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Smith MR, Naeli P, Jafarnejad SM, Costa G. The scaffolding protein AKAP12 regulates mRNA localization and translation. Proc Natl Acad Sci U S A 2024; 121:e2320609121. [PMID: 38652739 DOI: 10.1073/pnas.2320609121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 03/22/2024] [Indexed: 04/25/2024] Open
Abstract
Regulation of subcellular messenger (m)RNA localization is a fundamental biological mechanism, which adds a spatial dimension to the diverse layers of post-transcriptional control of gene expression. The cellular compartment in which mRNAs are located may define distinct aspects of the encoded proteins, ranging from production rate and complex formation to localized activity. Despite the detailed roles of localized mRNAs that have emerged over the past decades, the identity of factors anchoring mRNAs to subcellular domains remains ill-defined. Here, we used an unbiased method to profile the RNA-bound proteome in migrating endothelial cells (ECs) and discovered that the plasma membrane (PM)-associated scaffolding protein A-kinase anchor protein (AKAP)12 interacts with various mRNAs, including transcripts encoding kinases with Actin remodeling activity. In particular, AKAP12 targets a transcript coding for the kinase Abelson Tyrosine-Protein Kinase 2 (ABL2), which we found to be necessary for adequate filopodia formation and angiogenic sprouting. Moreover, we demonstrate that AKAP12 is necessary for anchoring ABL2 mRNA to the PM and show that in the absence of AKAP12, the translation efficiency of ABL2 mRNA is reduced. Altogether, our work identified a unique post-transcriptional function for AKAP12 and sheds light into mechanisms of spatial control of gene expression.
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Affiliation(s)
- Madeleine R Smith
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University, Belfast BT9 7BL, United Kingdom
| | - Parisa Naeli
- The Patrick G Johnston Centre for Cancer Research, Queen's University, Belfast BT9 7BL, United Kingdom
| | - Seyed M Jafarnejad
- The Patrick G Johnston Centre for Cancer Research, Queen's University, Belfast BT9 7BL, United Kingdom
| | - Guilherme Costa
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University, Belfast BT9 7BL, United Kingdom
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2
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Qasim H, Rajaei M, Xu Y, Reyes-Alcaraz A, Abdelnasser HY, Stewart MD, Lahiri SK, Wehrens XHT, McConnell BK. AKAP12 Upregulation Associates With PDE8A to Accelerate Cardiac Dysfunction. Circ Res 2024; 134:1006-1022. [PMID: 38506047 DOI: 10.1161/circresaha.123.323655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 03/07/2024] [Indexed: 03/21/2024]
Abstract
BACKGROUND In heart failure, signaling downstream the β2-adrenergic receptor is critical. Sympathetic stimulation of β2-adrenergic receptor alters cAMP (cyclic adenosine 3',5'-monophosphate) and triggers PKA (protein kinase A)-dependent phosphorylation of proteins that regulate cardiac function. cAMP levels are regulated in part by PDEs (phosphodiesterases). Several AKAPs (A kinase anchoring proteins) regulate cardiac function and are proposed as targets for precise pharmacology. AKAP12 is expressed in the heart and has been reported to directly bind β2-adrenergic receptor, PKA, and PDE4D. However, its roles in cardiac function are unclear. METHODS cAMP accumulation in real time downstream of the β2-adrenergic receptor was detected for 60 minutes in live cells using the luciferase-based biosensor (GloSensor) in AC16 human-derived cardiomyocyte cell lines overexpressing AKAP12 versus controls. Cardiomyocyte intracellular calcium and contractility were studied in adult primary cardiomyocytes from male and female mice overexpressing cardiac AKAP12 (AKAP12OX) and wild-type littermates post acute treatment with 100-nM isoproterenol (ISO). Systolic cardiac function was assessed in mice after 14 days of subcutaneous ISO administration (60 mg/kg per day). AKAP12 gene and protein expression levels were evaluated in left ventricular samples from patients with end-stage heart failure. RESULTS AKAP12 upregulation significantly reduced total intracellular cAMP levels in AC16 cells through PDE8. Adult primary cardiomyocytes from AKAP12OX mice had significantly reduced contractility and impaired calcium handling in response to ISO, which was reversed in the presence of the selective PDE8 inhibitor (PF-04957325). AKAP12OX mice had deteriorated systolic cardiac function and enlarged left ventricles. Patients with end-stage heart failure had upregulated gene and protein levels of AKAP12. CONCLUSIONS AKAP12 upregulation in cardiac tissue is associated with accelerated cardiac dysfunction through the AKAP12-PDE8 axis.
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Affiliation(s)
- Hanan Qasim
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy (H.Q., M.R., Y.X., A.R.-A., H.Y.A., B.K.M.), University of Houston, TX
| | - Mehrdad Rajaei
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy (H.Q., M.R., Y.X., A.R.-A., H.Y.A., B.K.M.), University of Houston, TX
| | - Ying Xu
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy (H.Q., M.R., Y.X., A.R.-A., H.Y.A., B.K.M.), University of Houston, TX
| | - Arfaxad Reyes-Alcaraz
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy (H.Q., M.R., Y.X., A.R.-A., H.Y.A., B.K.M.), University of Houston, TX
| | - Hala Y Abdelnasser
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy (H.Q., M.R., Y.X., A.R.-A., H.Y.A., B.K.M.), University of Houston, TX
| | - M David Stewart
- Department of Biology and Biochemistry (M.D.S.), University of Houston, TX
| | - Satadru K Lahiri
- Cardiovascular Research Institute, Departments of Integrative Physiology, Medicine, Neuroscience, Pediatrics, and Center for Space Medicine, Baylor College of Medicine, Houston, TX (S.K.L., X.H.T.W.)
| | - Xander H T Wehrens
- Cardiovascular Research Institute, Departments of Integrative Physiology, Medicine, Neuroscience, Pediatrics, and Center for Space Medicine, Baylor College of Medicine, Houston, TX (S.K.L., X.H.T.W.)
| | - Bradley K McConnell
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy (H.Q., M.R., Y.X., A.R.-A., H.Y.A., B.K.M.), University of Houston, TX
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3
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Subramanian H, Nikolaev VO. AKAP12 Overexpression Affects Cardiac Function via PDE8. Circ Res 2024; 134:1023-1025. [PMID: 38603476 DOI: 10.1161/circresaha.124.324475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
Affiliation(s)
- Hariharan Subramanian
- Institute of Experimental Cardiovascular Research, University Medical Center Hamburg-Eppendorf, Germany (H.S., V.O.N.)
- German Center for Cardiovascular Research (DZHK), Partner Site Hamburg/Kiel/Lübeck, Germany (H.S., V.O.N.)
| | - Viacheslav O Nikolaev
- Institute of Experimental Cardiovascular Research, University Medical Center Hamburg-Eppendorf, Germany (H.S., V.O.N.)
- German Center for Cardiovascular Research (DZHK), Partner Site Hamburg/Kiel/Lübeck, Germany (H.S., V.O.N.)
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Liang Z, Dai C, He F, Wang Y, Huang Y, Li H, Wu Y, Hu Y, Xu K. AKAP3-mediated type I PKA signaling is required for mouse sperm hyperactivation and fertility†. Biol Reprod 2024; 110:684-697. [PMID: 38145487 DOI: 10.1093/biolre/ioad180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 11/14/2023] [Accepted: 12/19/2023] [Indexed: 12/27/2023] Open
Abstract
The protein kinase A (PKA) signaling pathway, which mediates protein phosphorylation, is important for sperm motility and male fertility. This process relies on A-kinase anchoring proteins that organize PKA and its signalosomes within specific subcellular compartments. Previously, it was found that the absence of A-kinase anchoring protein 3 (AKAP3) leads to multiple morphological abnormalities in mouse sperm. But how AKAP3 regulates sperm motility is yet to be elucidated. AKAP3 has two amphipathic domains, here named dual and RI, in its N-terminus. These domains are responsible for binding regulatory subunits I alpha (RIα) and II alpha (RIIα) of PKA and for RIα only, respectively. Here, we generated mutant mice lacking the dual and RI domains of AKAP3. It was found that the deletion of these domains caused male mouse infertile, accompanied by mild defects in the fibrous sheath of sperm tails. Additionally, the levels of serine/threonine phosphorylation of PKA substrates and tyrosine phosphorylation decreased in the mutant sperm, which exhibited a defect in hyperactivation under capacitation conditions. The protein levels of PKA subunits remained unchanged. But, interestingly, the regulatory subunit RIα was mis-localized from principal piece to midpiece of sperm tail, whereas this was not observed for RIIα. Further protein-protein interaction assays revealed a preference for AKAP3 to bind RIα over RIIα. Collectively, our findings suggest that AKAP3 is important for sperm hyperactivity by regulating type-I PKA signaling pathway mediated protein phosphorylation via its dual and RI domains.
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Affiliation(s)
- Zhongkun Liang
- Center for Reproductive Medicine, SunYat-Sen Memorial Hospital of SunYat-Sen University, Guangzhou 510120, China
| | - Chaowei Dai
- Department of Neurology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Fenfen He
- Department of Neurology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Yu Wang
- Prenatal Diagnostic Center of Obstetrics and Gynecology Department, Qilu Hospital of Shandong University, Jinan 250012, China
| | - Yihua Huang
- Department of Neurology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Heying Li
- Analysis and Testing Center, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510535, China
| | - Yongming Wu
- Department of Neurology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Yafang Hu
- Department of Neurology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Kaibiao Xu
- Department of Neurology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
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Kang M, Otani Y, Guo Y, Yan J, Goult BT, Howe AK. The focal adhesion protein talin is a mechanically gated A-kinase anchoring protein. Proc Natl Acad Sci U S A 2024; 121:e2314947121. [PMID: 38513099 PMCID: PMC10990152 DOI: 10.1073/pnas.2314947121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 02/22/2024] [Indexed: 03/23/2024] Open
Abstract
Protein kinase A (PKA) is a ubiquitous, promiscuous kinase whose activity is specified through subcellular localization mediated by A-kinase anchoring proteins (AKAPs). PKA has complex roles as both an effector and a regulator of integrin-mediated cell adhesion to extracellular matrix (ECM). Recent observations demonstrate that PKA is an active component of focal adhesions (FA), suggesting the existence of one or more FA AKAPs. Using a promiscuous biotin ligase fused to PKA type-IIα regulatory (RIIα) subunits and subcellular fractionation, we identify the archetypal FA protein talin1 as an AKAP. Talin is a large, mechanosensitive scaffold that directly links integrins to actin filaments and promotes FA assembly by recruiting additional components in a force-dependent manner. The rod region of talin1 consists of 62 α-helices bundled into 13 rod domains, R1 to R13. Direct binding assays and NMR spectroscopy identify helix41 in the R9 subdomain of talin as the PKA binding site. PKA binding to helix41 requires unfolding of the R9 domain, which requires the linker region between R9 and R10. Experiments with single molecules and in cells manipulated to alter actomyosin contractility demonstrate that the PKA-talin interaction is regulated by mechanical force across the talin molecule. Finally, talin mutations that disrupt PKA binding also decrease levels of total and phosphorylated PKA RII subunits as well as phosphorylation of VASP, a known PKA substrate, within FA. These observations identify a mechanically gated anchoring protein for PKA, a force-dependent binding partner for talin1, and a potential pathway for adhesion-associated mechanotransduction.
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Affiliation(s)
- Mingu Kang
- Department of Pharmacology, University of Vermont Larner College of Medicine, Burlington, VT05405
- Department of Molecular Physiology and Biophysics, University of Vermont Larner College of Medicine, Burlington, VT05405
- University of Vermont Cancer Center, Burlington, VT05405
| | - Yasumi Otani
- School of Biosciences, University of Kent, Canterbury, KentCT2 7NJ, United Kingdom
- Department of Biochemistry, Cell and Systems Biology, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, LiverpoolL69 7ZB, United Kingdom
| | - Yanyu Guo
- Department of Physics, Mechanobiology Institute, National University of Singapore, Singapore117542, Singapore
| | - Jie Yan
- Department of Physics, Mechanobiology Institute, National University of Singapore, Singapore117542, Singapore
| | - Benjamin T. Goult
- School of Biosciences, University of Kent, Canterbury, KentCT2 7NJ, United Kingdom
- Department of Biochemistry, Cell and Systems Biology, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, LiverpoolL69 7ZB, United Kingdom
| | - Alan K. Howe
- Department of Pharmacology, University of Vermont Larner College of Medicine, Burlington, VT05405
- Department of Molecular Physiology and Biophysics, University of Vermont Larner College of Medicine, Burlington, VT05405
- University of Vermont Cancer Center, Burlington, VT05405
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6
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Simmons SC, Flerlage WJ, Langlois LD, Shepard RD, Bouslog C, Thomas EH, Gouty KM, Sanderson JL, Gouty S, Cox BM, Dell'Acqua ML, Nugent FS. AKAP150-anchored PKA regulates synaptic transmission and plasticity, neuronal excitability and CRF neuromodulation in the mouse lateral habenula. Commun Biol 2024; 7:345. [PMID: 38509283 PMCID: PMC10954712 DOI: 10.1038/s42003-024-06041-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 03/08/2024] [Indexed: 03/22/2024] Open
Abstract
The scaffolding A-kinase anchoring protein 150 (AKAP150) is critically involved in kinase and phosphatase regulation of synaptic transmission/plasticity, and neuronal excitability. Emerging evidence also suggests that AKAP150 signaling may play a key role in brain's processing of rewarding/aversive experiences, however its role in the lateral habenula (LHb, as an important brain reward circuitry) is completely unknown. Using whole cell patch clamp recordings in LHb of male wildtype and ΔPKA knockin mice (with deficiency in AKAP-anchoring of PKA), here we show that the genetic disruption of PKA anchoring to AKAP150 significantly reduces AMPA receptor-mediated glutamatergic transmission and prevents the induction of presynaptic endocannabinoid-mediated long-term depression in LHb neurons. Moreover, ΔPKA mutation potentiates GABAA receptor-mediated inhibitory transmission while increasing LHb intrinsic excitability through suppression of medium afterhyperpolarizations. ΔPKA mutation-induced suppression of medium afterhyperpolarizations also blunts the synaptic and neuroexcitatory actions of the stress neuromodulator, corticotropin releasing factor (CRF), in mouse LHb. Altogether, our data suggest that AKAP150 complex signaling plays a critical role in regulation of AMPA and GABAA receptor synaptic strength, glutamatergic plasticity and CRF neuromodulation possibly through AMPA receptor and potassium channel trafficking and endocannabinoid signaling within the LHb.
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Affiliation(s)
- Sarah C Simmons
- Uniformed Services University of the Health Sciences, Department of Pharmacology and Molecular Therapeutics, Bethesda, MD, 20814, USA
| | - William J Flerlage
- Uniformed Services University of the Health Sciences, Department of Pharmacology and Molecular Therapeutics, Bethesda, MD, 20814, USA
| | - Ludovic D Langlois
- Uniformed Services University of the Health Sciences, Department of Pharmacology and Molecular Therapeutics, Bethesda, MD, 20814, USA
| | - Ryan D Shepard
- Uniformed Services University of the Health Sciences, Department of Pharmacology and Molecular Therapeutics, Bethesda, MD, 20814, USA
| | - Christopher Bouslog
- Uniformed Services University of the Health Sciences, Department of Pharmacology and Molecular Therapeutics, Bethesda, MD, 20814, USA
| | - Emily H Thomas
- Uniformed Services University of the Health Sciences, Department of Pharmacology and Molecular Therapeutics, Bethesda, MD, 20814, USA
| | - Kaitlyn M Gouty
- Uniformed Services University of the Health Sciences, Department of Pharmacology and Molecular Therapeutics, Bethesda, MD, 20814, USA
| | - Jennifer L Sanderson
- Department of Pharmacology, University of Colorado School of Medicine, Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Shawn Gouty
- Uniformed Services University of the Health Sciences, Department of Pharmacology and Molecular Therapeutics, Bethesda, MD, 20814, USA
| | - Brian M Cox
- Uniformed Services University of the Health Sciences, Department of Pharmacology and Molecular Therapeutics, Bethesda, MD, 20814, USA
| | - Mark L Dell'Acqua
- Department of Pharmacology, University of Colorado School of Medicine, Anschutz Medical Campus, Aurora, CO, 80045, USA.
| | - Fereshteh S Nugent
- Uniformed Services University of the Health Sciences, Department of Pharmacology and Molecular Therapeutics, Bethesda, MD, 20814, USA.
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7
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Omar MH, Byrne DP, Shrestha S, Lakey TM, Lee KS, Lauer SM, Collins KB, Daly LA, Eyers CE, Baird GS, Ong SE, Kannan N, Eyers PA, Scott JD. Discovery of a Cushing's syndrome protein kinase A mutant that biases signaling through type I AKAPs. Sci Adv 2024; 10:eadl1258. [PMID: 38381834 PMCID: PMC10881042 DOI: 10.1126/sciadv.adl1258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 01/18/2024] [Indexed: 02/23/2024]
Abstract
Adrenal Cushing's syndrome is a disease of cortisol hypersecretion often caused by mutations in protein kinase A catalytic subunit (PKAc). Using a personalized medicine screening platform, we discovered a Cushing's driver mutation, PKAc-W196G, in ~20% of patient samples analyzed. Proximity proteomics and photokinetic imaging reveal that PKAcW196G is unexpectedly distinct from other described Cushing's variants, exhibiting retained association with type I regulatory subunits (RI) and their corresponding A kinase anchoring proteins (AKAPs). Molecular dynamics simulations predict that substitution of tryptophan-196 with glycine creates a 653-cubic angstrom cleft between the catalytic core of PKAcW196G and type II regulatory subunits (RII), but only a 395-cubic angstrom cleft with RI. Endocrine measurements show that overexpression of RIα or redistribution of PKAcW196G via AKAP recruitment counteracts stress hormone overproduction. We conclude that a W196G mutation in the kinase catalytic core skews R subunit selectivity and biases AKAP association to drive Cushing's syndrome.
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Affiliation(s)
- Mitchell H. Omar
- Department of Pharmacology, University of Washington, Seattle, WA 98195, USA
| | - Dominic P. Byrne
- Department of Biochemistry, Cell and Systems Biology, University of Liverpool, Liverpool L69 7ZB, UK
| | - Safal Shrestha
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA 30602, USA
| | - Tyler M. Lakey
- Department of Pharmacology, University of Washington, Seattle, WA 98195, USA
| | - Kyung-Soon Lee
- Department of Pharmacology, University of Washington, Seattle, WA 98195, USA
| | - Sophia M. Lauer
- Department of Pharmacology, University of Washington, Seattle, WA 98195, USA
| | - Kerrie B. Collins
- Department of Pharmacology, University of Washington, Seattle, WA 98195, USA
| | - Leonard A. Daly
- Centre for Proteome Research, Department of Biochemistry, Cell and Systems Biology, University of Liverpool, Liverpool L69 7ZB, UK
| | - Claire E. Eyers
- Centre for Proteome Research, Department of Biochemistry, Cell and Systems Biology, University of Liverpool, Liverpool L69 7ZB, UK
| | - Geoffrey S. Baird
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA 98195, USA
| | - Shao-En Ong
- Department of Pharmacology, University of Washington, Seattle, WA 98195, USA
| | - Natarajan Kannan
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA 30602, USA
| | - Patrick A. Eyers
- Department of Biochemistry, Cell and Systems Biology, University of Liverpool, Liverpool L69 7ZB, UK
| | - John D. Scott
- Department of Pharmacology, University of Washington, Seattle, WA 98195, USA
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8
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Wang W, Dai X, Li Y, Li M, Chi Z, Hu X, Wang Z. The miR-669a-5p/G3BP/HDAC6/AKAP12 Axis Regulates Primary Cilia Length. Adv Sci (Weinh) 2024; 11:e2305068. [PMID: 38088586 PMCID: PMC10853727 DOI: 10.1002/advs.202305068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 11/13/2023] [Indexed: 02/10/2024]
Abstract
Primary cilia are conserved organelles in most mammalian cells, acting as "antennae" to sense external signals. Maintaining a physiological cilium length is required for cilium function. MicroRNAs (miRNAs) are potent gene expression regulators, and aberrant miRNA expression is closely associated with ciliopathies. However, how miRNAs modulate cilium length remains elusive. Here, using the calcium-shock method and small RNA sequencing, a miRNA is identified, namely, miR-669a-5p, that is highly expressed in the cilia-enriched noncellular fraction. It is shown that miR-669a-5p promotes cilium elongation but not cilium formation in cultured cells. Mechanistically, it is demonstrated that miR-669a-5p represses ras-GTPase-activating protein SH3-domain-binding protein (G3BP) expression to inhibit histone deacetylase 6 (HDAC6) expression, which further upregulates A-kinase anchor protein 12 (AKAP12) expression. This effect ultimately blocks cilia disassembly and leads to greater cilium length, which can be restored to wild-type lengths by either upregulating HDAC6 or downregulating AKAP12. Collectively, these results elucidate a previously unidentified miR-669a-5p/G3BP/HDAC6/AKAP12 signaling pathway that regulates cilium length, providing potential pharmaceutical targets for treating ciliopathies.
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Affiliation(s)
- Weina Wang
- School of Life SciencesInstitute of Life Science and Green DevelopmentHebei UniversityBaoding071002China
| | - Xuyao Dai
- School of Life SciencesInstitute of Life Science and Green DevelopmentHebei UniversityBaoding071002China
| | - Yue Li
- School of Life SciencesInstitute of Life Science and Green DevelopmentHebei UniversityBaoding071002China
| | - Mo Li
- School of Public HealthHebei UniversityBaoding071000China
| | - Zongqi Chi
- School of Public HealthHebei UniversityBaoding071000China
| | - Xiaoyu Hu
- School of Life SciencesInstitute of Life Science and Green DevelopmentHebei UniversityBaoding071002China
| | - Zhenshan Wang
- School of Life SciencesInstitute of Life Science and Green DevelopmentHebei UniversityBaoding071002China
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9
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Hermida A, Ader F, Jedraszak G, Viboud G, Fressart V, Bréhin AC, Gérard M, Khraiche D, Palmyre A, Paziaud O, Popescu E, Proukhnitzky J, Laredo M, Richard P, Vedrenne G, Vernier A, Charron P, Gandjbakhch E. Prevalence and Significance of Rare Genetic Variants in AKAP9 in Inherited Cardiac Diseases. Circ Genom Precis Med 2024; 17:e004260. [PMID: 38258564 DOI: 10.1161/circgen.123.004260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Affiliation(s)
- Alexis Hermida
- Cardiology, Arrhythmia, and Cardiac Stimulation Service, Amiens, France (A.H., G. Viboud)
- EA4666 Hématopoïèse et Immunologie, University of Picardie Jules Verne, Amiens, France (G.J.)
- Assistance Publique-Hôpitaux de Paris, Pitié-Salpêtrière Hospital, Institute of Cardiology, Institute for Cardiometabolism and Nutrition, Paris, France (A.H., J.P., M.L., P.C., E.G.)
| | - Flavie Ader
- Unité Pédagogique de Biochimie, Département des Sciences Biologiques et Médicales, Unité de Formation et de Recherche de Pharmacie-Faculté de Santé, Université Paris Cité, France (F.A.)
- Sorbonne Université, Institut National de la Santé et de la Recherche Médicale 1166, Paris, France (F.A., J.P., M.L., P.C., E.G.)
| | - Guillaume Jedraszak
- EA4666 Hématopoïèse et Immunologie, University of Picardie Jules Verne, Amiens, France (G.J.)
- Molecular Genetics Laboratory, Amiens-Picardie University Hospital, Amiens, France (G.J.)
| | - Guillaume Viboud
- Cardiology, Arrhythmia, and Cardiac Stimulation Service, Amiens, France (A.H., G. Viboud)
| | - Véronique Fressart
- Unité Fonctionnelle de Cardiogénétique et Myogénétique Moléculaire et Cellulaire, Département Médico-Universitaire Biogem, Service de Biochimie Métabolique, AP-HP-Sorbonne Université, Pitié-Salpêtrière-Charles Foix, Paris, France (V.F., P.R.)
| | - Anne-Claire Bréhin
- Service de génétique, Centre Hospitalier Universitairemn Rouen, France (A.-C.B.)
| | | | - Diala Khraiche
- Service de cardiologie pédiatrique, Hôpital Necker, APHP, Paris, France (D.K.)
| | - Aurélien Palmyre
- APHP, Ambroise Paré Hospital, Department of Genetics, Referral Center for Cardiac Hereditary Cardiac Diseases, Boulogne-Billancourt, Paris, France (A.P., P.C.)
| | - Olivier Paziaud
- Service de rythmologie, Centre Cardiologique du Nord, Saint-Denis, France (O.P.)
| | - Elena Popescu
- Service de cardiologie, Hôpital du Havre, France (E.P.)
| | - Julie Proukhnitzky
- Assistance Publique-Hôpitaux de Paris, Pitié-Salpêtrière Hospital, Institute of Cardiology, Institute for Cardiometabolism and Nutrition, Paris, France (A.H., J.P., M.L., P.C., E.G.)
- Sorbonne Université, Institut National de la Santé et de la Recherche Médicale 1166, Paris, France (F.A., J.P., M.L., P.C., E.G.)
- APHP, Pitié-Salpêtrière Hospital, Department of Genetics, Department of Cardiology, Referral Center for Hereditary Cardiac Diseases (J.P., P.C.)
| | - Mikael Laredo
- Assistance Publique-Hôpitaux de Paris, Pitié-Salpêtrière Hospital, Institute of Cardiology, Institute for Cardiometabolism and Nutrition, Paris, France (A.H., J.P., M.L., P.C., E.G.)
- Sorbonne Université, Institut National de la Santé et de la Recherche Médicale 1166, Paris, France (F.A., J.P., M.L., P.C., E.G.)
| | - Pascale Richard
- Unité Fonctionnelle de Cardiogénétique et Myogénétique Moléculaire et Cellulaire, Département Médico-Universitaire Biogem, Service de Biochimie Métabolique, AP-HP-Sorbonne Université, Pitié-Salpêtrière-Charles Foix, Paris, France (V.F., P.R.)
| | - Géraldine Vedrenne
- Service de Cardiologie, Hôpital Saint Joseph, Paris, France (G. Vedrenne)
| | - Agathe Vernier
- Cardiology department, Victor Pauchet Clinic, Amiens, 80000, France (A.V.)
| | - Philippe Charron
- Assistance Publique-Hôpitaux de Paris, Pitié-Salpêtrière Hospital, Institute of Cardiology, Institute for Cardiometabolism and Nutrition, Paris, France (A.H., J.P., M.L., P.C., E.G.)
- Sorbonne Université, Institut National de la Santé et de la Recherche Médicale 1166, Paris, France (F.A., J.P., M.L., P.C., E.G.)
- APHP, Ambroise Paré Hospital, Department of Genetics, Referral Center for Cardiac Hereditary Cardiac Diseases, Boulogne-Billancourt, Paris, France (A.P., P.C.)
- APHP, Pitié-Salpêtrière Hospital, Department of Genetics, Department of Cardiology, Referral Center for Hereditary Cardiac Diseases (J.P., P.C.)
| | - Estelle Gandjbakhch
- Assistance Publique-Hôpitaux de Paris, Pitié-Salpêtrière Hospital, Institute of Cardiology, Institute for Cardiometabolism and Nutrition, Paris, France (A.H., J.P., M.L., P.C., E.G.)
- Sorbonne Université, Institut National de la Santé et de la Recherche Médicale 1166, Paris, France (F.A., J.P., M.L., P.C., E.G.)
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10
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Reggi E, Kaiser S, Sahnane N, Uccella S, La Rosa S, Diviani D. AKAP2-anchored protein phosphatase 1 controls prostatic neuroendocrine carcinoma cell migration and invasion. Biochim Biophys Acta Mol Basis Dis 2024; 1870:166916. [PMID: 37827203 DOI: 10.1016/j.bbadis.2023.166916] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 09/20/2023] [Accepted: 10/06/2023] [Indexed: 10/14/2023]
Abstract
Prostate cancer (PC) is the second leading cause of cancer-related death in men. The growth of primary prostate cancer cells relies on circulating androgens and thus the standard therapy for the treatment of localized and advanced PC is the androgen deprivation therapy. Prostatic neuroendocrine carcinoma (PNEC) is an aggressive and highly metastatic subtype of prostate cancer, which displays poor prognosis and high lethality. Most of PNECs develop from prostate adenocarcinoma in response to androgen deprivation therapy, however the mechanisms involved in this transition and in the elevated biological aggressiveness of PNECs are poorly defined. Our current findings indicate that AKAP2 expression is dramatically upregulated in PNECs as compared to non-cancerous prostate tissues. Using a PNEC cell model, we could show that AKAP2 is localized both intracellularly and at the cell periphery where it colocalizes with F-actin. AKAP2 and F-actin interact directly through a newly identified actin-binding domain located on AKAP2. RNAi-mediated silencing of AKAP2 promotes the phosphorylation and deactivation of cofilin, a protein involved in actin turnover. This effect correlates with a significant reduction in cell migration and invasion. Co-immunoprecipitation experiments and proximity ligation assays revealed that AKAP2 forms a complex with the catalytic subunit of protein phosphatase 1 (PP1) in PNECs. Importantly, AKAP2-mediated anchoring of PP1 to the actin cytoskeleton regulates cofilin dephosphorylation and activation, which, in turn, enhances F-actin dynamics and favors migration and invasion. In conclusion, this study identified AKAP2 as an anchoring protein overexpressed in PNECs that controls cancer cell invasive properties by regulating cofilin phosphorylation.
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Affiliation(s)
- Erica Reggi
- Department of Biomedical Sciences, Faculty of Biology et Medicine, University of Lausanne, 1011 Lausanne, Switzerland
| | - Simon Kaiser
- Department of Biomedical Sciences, Faculty of Biology et Medicine, University of Lausanne, 1011 Lausanne, Switzerland
| | - Nora Sahnane
- Unit of Pathology, Department of Oncology, ASST Sette Laghi, Varese, Italy
| | - Silvia Uccella
- Department of Biomedical Sciences, Humanitas University, Milan, Italy; Pathology Service, Istituti di Ricovero e Cura a Carattere Scientifico (IRCCS), Humanitas Research Hospital, Milan, Italy
| | - Stefano La Rosa
- Unit of Pathology, Department of Oncology, ASST Sette Laghi, Varese, Italy; Unit of Pathology, Department of Medicine and Technological Innovation, University of Insubria, Varese, Italy
| | - Dario Diviani
- Department of Biomedical Sciences, Faculty of Biology et Medicine, University of Lausanne, 1011 Lausanne, Switzerland.
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11
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Soboska K, Kusiński M, Pawelczyk K, Migdalska-Sęk M, Brzeziańska-Lasota E, Czarnecka-Chrebelska KH. Expression of RASSF1A, DIRAS3, and AKAP9 Genes in Thyroid Lesions: Implications for Differential Diagnosis and Prognosis of Thyroid Carcinomas. Int J Mol Sci 2024; 25:562. [PMID: 38203733 PMCID: PMC10778957 DOI: 10.3390/ijms25010562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 12/25/2023] [Accepted: 12/27/2023] [Indexed: 01/12/2024] Open
Abstract
Thyroid carcinoma is the primary endocrine malignancy worldwide. The preoperative examination of thyroid tissue lesion is often unclear. Approximately 25% of thyroid cancers cannot be diagnosed definitively without post-surgery histopathological examination. The assessment of diagnostic and differential markers of thyroid cancers is needed to improve preoperative diagnosis and reduce unnecessary treatments. Here, we assessed the expression of RASSF1A, DIRAS3, and AKAP9 genes, and the presence of BRAF V600E point mutation in benign and malignant thyroid lesions in a Polish cohort (120 patients). We have also performed a comparative analysis of gene expression using data obtained from the Gene Expression Omnibus (GEO) database (307 samples). The expression of RASSF1A and DIRAS3 was decreased, whereas AKAP9's was increased in pathologically changed thyroid compared with normal thyroid tissue, and significantly correlated with e.g., histopathological type of lesion papillary thyroid cancer (PTC) vs follicular thyroid cancer (FTC), patient's age, tumour stage, or its encapsulation. The receiver operating characteristic (ROC) analysis for the more aggressive FTC subtype differential marker suggests value in estimating RASSF1A and AKAP9 expression, with their area under curve (AUC), specificity, and sensitivity at 0.743 (95% CI: 0.548-0.938), 82.2%, and 66.7%; for RASSF1A, and 0.848 (95% CI: 0.698-0.998), 54.8%, and 100%, for AKAP9. Our research gives new insight into the basis of the aggressiveness and progression of thyroid cancers, and provides information on potential differential markers that may improve preoperative diagnosis.
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Affiliation(s)
- Kamila Soboska
- Department of Biomedicine and Genetics, Medical University of Lodz, 251 Str. Pomorska, 92-213 Lodz, Poland (M.M.-S.)
- Department of Oncobiology and Epigenetics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland;
| | - Michał Kusiński
- Department of Endocrine, General and Vascular Surgery, Medical University of Lodz, 62 Str. Pabianicka, 93-513 Lodz, Poland;
| | - Karol Pawelczyk
- Department of Biomedicine and Genetics, Medical University of Lodz, 251 Str. Pomorska, 92-213 Lodz, Poland (M.M.-S.)
- Faculty of Medicine, Medical University of Lodz, Av. Kościuszki 4, 90-419 Lodz, Poland
| | - Monika Migdalska-Sęk
- Department of Biomedicine and Genetics, Medical University of Lodz, 251 Str. Pomorska, 92-213 Lodz, Poland (M.M.-S.)
| | - Ewa Brzeziańska-Lasota
- Department of Biomedicine and Genetics, Medical University of Lodz, 251 Str. Pomorska, 92-213 Lodz, Poland (M.M.-S.)
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12
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Li X, Dong H, Zheng Y, Ding S, Li Y, Li H, Huang H, Zhong C, Xie T, Xu Y. AKAP12 inhibits esophageal squamous carcinoma cell proliferation, migration, and cell cycle via the PI3K/AKT signaling pathway. Mol Cell Probes 2023; 72:101939. [PMID: 37879503 DOI: 10.1016/j.mcp.2023.101939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 10/12/2023] [Accepted: 10/17/2023] [Indexed: 10/27/2023]
Abstract
Esophageal squamous cell carcinoma (ESCC) consistently ranks as one of the most challenging variants of squamous cell carcinomas, primarily due to the lack of effective early detection strategies. We herein aimed to elucidate the underlying mechanisms and biological role associated with A-kinase anchoring protein 12 (AKAP12) in the context of ESCC. Bioinformatic analysis had revealed significantly lower expression level of AKAP12 in ESCC tissue samples than in their non-cancerous counterparts. To gain deeper insights into the potential role of AKAP12 in the progression of ESCC, we conducted a single-gene set enrichment analysis of AKAP12 on ESCC datasets. Our findings suggested that AKAP12 exhibits functions inhibiting cell cycle progression, tumor proliferation, and epithelial-mesenchymal transition. To further validate our findings, we subjected ESCC cell lines to AKAP12 overexpression using CRISPR/Cas9-SAM. In vitro analyses demonstrated that increased expression of AKAP12 significantly reduced cell proliferation, migration, and cell cycle progression. Simultaneously, genes associated with this biological role undergo corresponding regulatory shifts. These observations provided valuable insights into the biological role played by AKAP12 in ESCC progression. In summary, AKAP12 shows promise as a new potential biomarker for early ESCC diagnosis, offering potential advantages for subsequent therapeutic intervention and disease management.
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Affiliation(s)
- Xingyi Li
- Department of Thoracic and Cardiovascular Surgery, The Second Affiliated Hospital of Nantong University, The First People's Hospital of Nantong, 226001, Nantong, China; Department of Thoracic and Cardiovascular Surgery, First Affiliated Hospital of Huzhou Teachers College, The First Hospital of Huzhou, 313000, Huzhou, China
| | - Hao Dong
- Department of Thoracic and Cardiovascular Surgery, The Second Affiliated Hospital of Nantong University, The First People's Hospital of Nantong, 226001, Nantong, China
| | - Yifan Zheng
- Department of Thoracic and Cardiovascular Surgery, The Second Affiliated Hospital of Nantong University, The First People's Hospital of Nantong, 226001, Nantong, China
| | - Shengguang Ding
- Department of Thoracic and Cardiovascular Surgery, The Second Affiliated Hospital of Nantong University, The First People's Hospital of Nantong, 226001, Nantong, China
| | - Yan Li
- Department of Thoracic and Cardiovascular Surgery, The Second Affiliated Hospital of Nantong University, The First People's Hospital of Nantong, 226001, Nantong, China
| | - Hefei Li
- Department of Thoracic and Cardiovascular Surgery, The Third Affiliated Hospital of Nantong University, The Third People's Hospital of Nantong, 226001, Nantong, China
| | - HaiTao Huang
- Department of Thoracic and Cardiovascular Surgery, The Second Affiliated Hospital of Nantong University, The First People's Hospital of Nantong, 226001, Nantong, China
| | - Congjun Zhong
- Department of Thoracic and Cardiovascular Surgery, The Second Affiliated Hospital of Nantong University, The First People's Hospital of Nantong, 226001, Nantong, China
| | - Tian Xie
- Department of Cardiothoracic Surgery, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210002, China.
| | - Yiming Xu
- Department of Thoracic and Cardiovascular Surgery, The Second Affiliated Hospital of Nantong University, The First People's Hospital of Nantong, 226001, Nantong, China.
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13
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Luo M, Hu Z, Liu Z, Tian X, Chen J, Yang J, Liu L, Lin C, Li D, He Q. Methyl protodioscin reduces c-Myc to ameliorate diabetes mellitus erectile dysfunction via downregulation of AKAP12. Diabetes Res Clin Pract 2023; 206:111012. [PMID: 37967586 DOI: 10.1016/j.diabres.2023.111012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 10/12/2023] [Accepted: 11/13/2023] [Indexed: 11/17/2023]
Abstract
BACKGROUND Diabetes mellitus erectile dysfunction (DMED) is one of common complications of diabetes. We aimed to investigate the potential efficacy of methyl protodioscin (MPD) in DMED and explored the underlying mechanism. METHODS Diabetic mice were induced by streptozotocin, while vascular endothelial cells (VECs) and vascular smooth muscle cells (VSMCs) were stimulated with high glucose. MPD was administrated in vitro and in vivo to verify its efficacy on DMED. The interaction of c-Myc and AKAP12 was determined by luciferase reporter assay and chromatin immunoprecipitation assay. RESULTS c-Myc and AKAP12 were upregulated in penile tissues in DMED mice. In high glucose-stimulated VSMCs or VECs, MPD intervention enhanced cell viability, inhibited apoptosis, decreased c-Myc and AKAP12, as well as elevated p-eNOS Ser1177. MPD-induced apoptosis inhibition, AKAP12 reduction and p-eNOSSer1177 elevation were reversed by AKAP12 overexpression. c-Myc functioned as a positive regulator of AKAP12. Overexpression of c-Myc reversed the effects induced by MPD in vitro, which was neutralized by AKAP12 silencing. MPD ameliorated erectile function in diabetic mice via inhibiting AKAP12. CONCLUSIONS MPD improved erectile dysfunction in streptozotocin-caused diabetic mice by regulating c-Myc/AKAP12 pathway, indicating that MPD could be developed as a promising natural agent for the treatment of DMED.
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Affiliation(s)
- Min Luo
- Hunan Engineering Research Center of Internet-Chinese and Western Medicine Collaboration-Health Service, Hunan University of Medicine, Huaihua 418000, Hunan Province, PR China; Department of Rehabilitation Medicine and Health Care, Hunan University of Medicine, Huaihua 418000, Hunan Province, PR China; Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha 410011, Hunan Province, PR China
| | - Zongren Hu
- Hunan Engineering Research Center of Internet-Chinese and Western Medicine Collaboration-Health Service, Hunan University of Medicine, Huaihua 418000, Hunan Province, PR China; Department of Rehabilitation Medicine and Health Care, Hunan University of Medicine, Huaihua 418000, Hunan Province, PR China; College of Integrated Traditional Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha 410208, Hunan Province, PR China
| | - Ziyu Liu
- College of Integrated Traditional Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha 410208, Hunan Province, PR China
| | - Xiaoying Tian
- Hunan Engineering Research Center of Internet-Chinese and Western Medicine Collaboration-Health Service, Hunan University of Medicine, Huaihua 418000, Hunan Province, PR China; Department of Rehabilitation Medicine and Health Care, Hunan University of Medicine, Huaihua 418000, Hunan Province, PR China
| | - Jisong Chen
- Hunan Engineering Research Center of Internet-Chinese and Western Medicine Collaboration-Health Service, Hunan University of Medicine, Huaihua 418000, Hunan Province, PR China; Department of Rehabilitation Medicine and Health Care, Hunan University of Medicine, Huaihua 418000, Hunan Province, PR China
| | - Jichang Yang
- Hunan Engineering Research Center of Internet-Chinese and Western Medicine Collaboration-Health Service, Hunan University of Medicine, Huaihua 418000, Hunan Province, PR China; Department of Rehabilitation Medicine and Health Care, Hunan University of Medicine, Huaihua 418000, Hunan Province, PR China; Gooeto Internet-Based Hospital, Changsha 410217, Hunan Province, PR China
| | - Lumei Liu
- College of Integrated Traditional Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha 410208, Hunan Province, PR China
| | - Chengxiong Lin
- Huairen Hospital of Traditional Chinese Medicine, Huaihua 418099, Hunan Province, PR China
| | - Dian Li
- Department of Ophthalmology, The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha 410007, Hunan Province, PR China
| | - Qinghu He
- Hunan Engineering Research Center of Internet-Chinese and Western Medicine Collaboration-Health Service, Hunan University of Medicine, Huaihua 418000, Hunan Province, PR China; Department of Rehabilitation Medicine and Health Care, Hunan University of Medicine, Huaihua 418000, Hunan Province, PR China; College of Integrated Traditional Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha 410208, Hunan Province, PR China.
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14
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Wei H, Zhang X, Wang C, Wang J, Li T, Chen S, Li H, Wang B. A pathogenic AKAP4 variant, p.R429H, causes male in/subfertility in humans and mice. Clin Transl Med 2023; 13:e1463. [PMID: 38050179 PMCID: PMC10696161 DOI: 10.1002/ctm2.1463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 10/09/2023] [Accepted: 10/16/2023] [Indexed: 12/06/2023] Open
Affiliation(s)
- Han Wei
- Center for GeneticsNational Research Institute for Family PlanningBeijingChina
- Graduate SchoolChinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina
- Center for Reproductive and Genetic MedicineDalian Municipal Women and Children's Medical CenterDalianChina
| | - Xiaohui Zhang
- Key Laboratory of Cell Proliferation and Regulation BiologyMinistry of EducationDepartment of BiologyCollege of Life SciencesBeijing Normal UniversityBeijingChina
| | - Chunyan Wang
- Center for GeneticsNational Research Institute for Family PlanningBeijingChina
- Graduate SchoolChinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina
| | - Jing Wang
- Department of Medical Genetics and Developmental BiologySchool of Basic Medical SciencesCapital Medical UniversityBeijingChina
| | - Tengyan Li
- Center for GeneticsNational Research Institute for Family PlanningBeijingChina
| | - Suren Chen
- Key Laboratory of Cell Proliferation and Regulation BiologyMinistry of EducationDepartment of BiologyCollege of Life SciencesBeijing Normal UniversityBeijingChina
| | - Hongjun Li
- Graduate SchoolChinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina
- Department of UrologyPeking Union Medical College HospitalBeijingChina
| | - Binbin Wang
- Center for GeneticsNational Research Institute for Family PlanningBeijingChina
- Graduate SchoolChinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina
- NHC Key Laboratory of Reproductive Health Engineering Technology Research (NRIFP)BeijingChina
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15
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Li K, Wu X, Li Y, Hu TT, Wang W, Gonzalez FJ, Liu W. AKAP12 promotes cancer stem cell-like phenotypes and activates STAT3 in colorectal cancer. Clin Transl Oncol 2023; 25:3263-3276. [PMID: 37326825 DOI: 10.1007/s12094-023-03230-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Accepted: 05/16/2023] [Indexed: 06/17/2023]
Abstract
BACKGROUND Cancer stem cells (CSCs) have unique biological characteristics, including tumorigenicity, immortality, and chemoresistance. Colorectal CSCs have been identified and isolated from colorectal cancers by various methods. AKAP12, a scaffolding protein, is considered to act as a potential suppressor in colorectal cancer, but its role in CSCs remains unknown. In this study, we investigated the function of AKAP12 in Colorectal CSCs. METHODS Herein, Colorectal CSCs were enriched by cell culture with a serum-free medium. CSC-associated characteristics were evaluated by Flow cytometry assay and qPCR. AKAP12 gene expression was regulated by lentiviral transfection assay. The tumorigenicity of AKAP12 in vivo by constructing a tumor xenograft model. The related pathways were explored by qPCR and Western blot. RESULTS The depletion of AKAP12 reduced colony formation, sphere formation, and expression of stem cell markers in colorectal cancer cells, while its knockdown decreased the volume and weight of tumor xenografts in vivo. AKAP12 expression levels also affected the expression of stemness markers associated with STAT3, potentially via regulating the expression of protein kinase C. CONCLUSION This study suggests Colorectal CSCs overexpress AKAP12 and maintain stem cell characteristics through the AKAP12/PKC/STAT3 pathway. AKAP12 may be an important therapeutic target for blocking the development of colorectal cancer in the field of cancer stem cells.
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Affiliation(s)
- Ke Li
- Department of Laboratory Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, People's Republic of China
| | - Xuan Wu
- Department of Laboratory Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, People's Republic of China
- Department of Laboratory Medicine, Shanghai Tenth People's Hospital Affiliated to Tongji University, Shanghai, 200070, People's Republic of China
| | - Yuan Li
- Department of Laboratory Medicine, Shanghai Tenth People's Hospital Affiliated to Tongji University, Shanghai, 200070, People's Republic of China
| | - Ting-Ting Hu
- Department of Laboratory Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, 200040, People's Republic of China
| | - Weifeng Wang
- Department of Laboratory Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, People's Republic of China
| | - Frank J Gonzalez
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Weiwei Liu
- Department of Laboratory Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, People's Republic of China.
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20892, USA.
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16
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Kim N, Kwon J, Shin US, Jung J. Fisetin induces the upregulation of AKAP12 mRNA and anti-angiogenesis in a patient-derived organoid xenograft model. Biomed Pharmacother 2023; 167:115613. [PMID: 37801904 DOI: 10.1016/j.biopha.2023.115613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 09/22/2023] [Accepted: 09/27/2023] [Indexed: 10/08/2023] Open
Abstract
Colorectal cancer (CRC) is associated with high incidence and mortality rates. Targeted therapies for CRC cause various adverse effects, necessitating the development of novel approaches to control CRC progression. In this milieu, we investigated the anti-CRC effects of fisetin, a natural plant flavonoid. Cytotoxicity was performed in CRC patient-derived organoids (30 T and 33 T). Fisetin-induced tumor growth was evaluated in a CRC patient-derived organoid xenograft (PDOX) model. RNA sequencing, immunohistochemistry, and western blotting were performed subsequently. Fisetin significantly decreased organoid viability in a dose-dependent manner. In the PDOX model, fisetin significantly delayed tumor growth, showing a decrease in Ki-67 expression and the induction of apoptosis. In tumor tissues, four genes were identified as differentially expressed between the control and fisetin-treated groups. Among these, A-kinase anchoring protein 12 (AKAP12) level was significantly increased by fisetin treatment (fold change > 2, p < 0.05). Notably, fisetin significantly inhibited vascular endothelial growth factor (VEGF) and epithelial cell adhesion molecule (EpCAM) via upregulation of AKAP12. Our results demonstrate the upregulation of AKAP12 mRNA and inhibition of angiogenesis by fisetin as a therapeutic strategy against CRC.
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Affiliation(s)
- Nayun Kim
- Duksung Innovative Drug Center, Duksung Women's University, Seoul 01369, the Republic of Korea; College of Pharmacy, Duksung Women's University, Seoul 01369, the Republic of Korea
| | - Junhye Kwon
- Department of Radiological & Clinical Research, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences (KIRAMS), Seoul 01812, the Republic of Korea
| | - Ui Sup Shin
- Department of Surgery, Korea Cancer Center Hospital, KIRAMS, Seoul 01812, the Republic of Korea
| | - Joohee Jung
- Duksung Innovative Drug Center, Duksung Women's University, Seoul 01369, the Republic of Korea; College of Pharmacy, Duksung Women's University, Seoul 01369, the Republic of Korea.
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17
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Chen J, Wang Y, Wu B, Shi H, Wang L. Experimental and molecular support for Cfap70 as a causative gene of 'multiple morphological abnormalities of the flagella' with male infertility†. Biol Reprod 2023; 109:450-460. [PMID: 37458246 DOI: 10.1093/biolre/ioad076] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 06/20/2023] [Accepted: 07/12/2023] [Indexed: 10/17/2023] Open
Abstract
Multiple morphological abnormalities of the flagella, a severe form of asthenozoospermia, can lead to male infertility. Recent studies have implicated an association between human CFAP70 deficiency and multiple morphological abnormalities of the flagella; however, the underlying biological mechanism and supporting experimental evidence in animal models remain unclear. To address this gap, we used CRISPR/Cas9 technology to generate Cfap70-deficient mice to investigate the relationship between Cfap70 deficiency and multiple morphological abnormalities of the flagella. Our findings show that the loss of CFAP70 leads to multiple morphological abnormalities of the flagella and spermiogenesis defects. Specifically, the lack of CFAP70 impairs sperm flagellum biogenesis and head shaping during spermiogenesis. Late-step spermatids from Cfap70-deficient mouse testis exhibited club-shaped sperm heads and abnormal disassembly of the manchette. Furthermore, we found that CFAP70 interacts with DNAI1 and DNAI2; Cfap70 deficiency also reduces the level of AKAP3 in sperm flagella, indicating that CFAP70 may participate in the flagellum assembly and transport of flagellar components. These findings provide compelling evidence implicating Cfap70 as a causative gene of multiple morphological abnormalities of the flagella and highlight the consequences of CFAP70 loss on flagellum biogenesis.
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Affiliation(s)
- Jingwen Chen
- NHC Key Laboratory of Reproduction Regulation, Shanghai Engineering Research Center of Reproductive Health Drug and Devices, School of Pharmacy, Shanghai Institute for Biomedical and Pharmaceutical Technologies, Fudan University, Shanghai, China
| | - Yaling Wang
- Shanghai Key Laboratory of Metabolic Remodeling and Health, Institute of Metabolism and Integrative Biology, Institute of Reproduction and Development, Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
| | - Bangguo Wu
- NHC Key Laboratory of Reproduction Regulation, Shanghai Engineering Research Center of Reproductive Health Drug and Devices, School of Pharmacy, Shanghai Institute for Biomedical and Pharmaceutical Technologies, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Metabolic Remodeling and Health, Institute of Metabolism and Integrative Biology, Institute of Reproduction and Development, Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
| | - Huijuan Shi
- NHC Key Laboratory of Reproduction Regulation, Shanghai Engineering Research Center of Reproductive Health Drug and Devices, School of Pharmacy, Shanghai Institute for Biomedical and Pharmaceutical Technologies, Fudan University, Shanghai, China
| | - Lingbo Wang
- Shanghai Key Laboratory of Metabolic Remodeling and Health, Institute of Metabolism and Integrative Biology, Institute of Reproduction and Development, Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
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18
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Cash A, de Jager C, Brickler T, Soliman E, Ladner L, Kaloss AM, Zhu Y, Pridham KJ, Mills J, Ju J, Basso EKG, Chen M, Johnson Z, Sotiropoulos Y, Wang X, Xie H, Matson JB, Marvin EA, Theus MH. Endothelial deletion of EPH receptor A4 alters single-cell profile and Tie2/Akap12 signaling to preserve blood-brain barrier integrity. Proc Natl Acad Sci U S A 2023; 120:e2204700120. [PMID: 37796990 PMCID: PMC10576133 DOI: 10.1073/pnas.2204700120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 09/06/2023] [Indexed: 10/07/2023] Open
Abstract
Neurobiological consequences of traumatic brain injury (TBI) result from a complex interplay of secondary injury responses and sequela that mediates chronic disability. Endothelial cells are important regulators of the cerebrovascular response to TBI. Our work demonstrates that genetic deletion of endothelial cell (EC)-specific EPH receptor A4 (EphA4) using conditional EphA4f/f/Tie2-Cre and EphA4f/f/VE-Cadherin-CreERT2 knockout (KO) mice promotes blood-brain barrier (BBB) integrity and tissue protection, which correlates with improved motor function and cerebral blood flow recovery following controlled cortical impact (CCI) injury. scRNAseq of capillary-derived KO ECs showed increased differential gene expression of BBB-related junctional and actin cytoskeletal regulators, namely, A-kinase anchor protein 12, Akap12, whose presence at Tie2 clustering domains is enhanced in KO microvessels. Transcript and protein analysis of CCI-injured whole cortical tissue or cortical-derived ECs suggests that EphA4 limits the expression of Cldn5, Akt, and Akap12 and promotes Ang2. Blocking Tie2 using sTie2-Fc attenuated protection and reversed Akap12 mRNA and protein levels cortical-derived ECs. Direct stimulation of Tie2 using Vasculotide, angiopoietin-1 memetic peptide, phenocopied the neuroprotection. Finally, we report a noteworthy rise in soluble Ang2 in the sera of individuals with acute TBI, highlighting its promising role as a vascular biomarker for early detection of BBB disruption. These findings describe a contribution of the axon guidance molecule, EphA4, in mediating TBI microvascular dysfunction through negative regulation of Tie2/Akap12 signaling.
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Affiliation(s)
- Alison Cash
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, Blacksburg, VA24061
| | - Caroline de Jager
- Translational Biology Medicine and Health Graduate Program, Virginia Tech, Blacksburg, VA24061
| | - Thomas Brickler
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, Blacksburg, VA24061
| | - Eman Soliman
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, Blacksburg, VA24061
| | - Liliana Ladner
- Virginia Tech Carilion School of Medicine, Virginia Tech, Roanoke, VA24016
| | - Alexandra M. Kaloss
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, Blacksburg, VA24061
| | - Yumeng Zhu
- Department of Chemistry, Virginia Tech, Blacksburg, VA24061
| | - Kevin J. Pridham
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, Blacksburg, VA24061
| | - Jatia Mills
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, Blacksburg, VA24061
| | - Jing Ju
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, Blacksburg, VA24061
| | | | - Michael Chen
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, Blacksburg, VA24061
| | - Zachary Johnson
- Genetics, Bioinformatics and Computational Biology Program, Virginia Tech, Blacksburg, VA24061
- Epigenomics and Computational Biology Lab, Fralin Life Sciences Institute, Virginia Tech, Blacksburg, VA24061
| | - Yianni Sotiropoulos
- Summer Veterinary Student Research Program, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA24061
| | - Xia Wang
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, Blacksburg, VA24061
| | - Hehuang Xie
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, Blacksburg, VA24061
- Genetics, Bioinformatics and Computational Biology Program, Virginia Tech, Blacksburg, VA24061
- Epigenomics and Computational Biology Lab, Fralin Life Sciences Institute, Virginia Tech, Blacksburg, VA24061
- Center for Engineered Health, Virginia Tech, Blacksburg, VA24061
| | - John B. Matson
- Department of Chemistry, Virginia Tech, Blacksburg, VA24061
| | - Eric A. Marvin
- Virginia Tech Carilion School of Medicine, Virginia Tech, Roanoke, VA24016
| | - Michelle H. Theus
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, Blacksburg, VA24061
- Summer Veterinary Student Research Program, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA24061
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19
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Zhou L, Mei J, Cao R, Liu X, Fu B, Ma M, Gong B, Luo L, Liu Y, Zhu Q, Meng X. Integrative analysis identifies AKAP8L as an immunological and prognostic biomarker of pan-cancer. Aging (Albany NY) 2023; 15:8851-8872. [PMID: 37683130 PMCID: PMC10522372 DOI: 10.18632/aging.205003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 08/21/2023] [Indexed: 09/10/2023]
Abstract
A-kinase anchoring protein 8L (AKAP8L) belong to the A-kinase anchoring protein (AKAP) family. Recent studies have proved that AKAP8L is associated with the progression of various tumors. To establish a more complete understanding of the significance of AKAP8L across various types of cancers, we conducted a detailed analysis of multiple histological datasets, including the level of gene expression in pancancer, biological function, molecular characteristics, as well as the diagnostic and prognostic value of AKAP8L in pancancer. Furthermore, we focused on renal clear cell carcinoma (KIRC), and of explored the correlation of AKAP8L with clinical characteristics, prognosis of distinct patient subsets, co-expression genes and differentially expressed genes (DEG). We also performed the immunohistochemical staining and semi-quantitative verification of the monoclonal antibody established by AKAP8L. Our findings indicate that AKAP8L expression varied significantly not only across most cancer types, but also across different cancer molecules and immune subtypes. In addition, the robust ability to accurately predict cancer and its strong correlation with the prognosis of cancer strongly suggest that AKAP8L may be a potential biomarker for cancer diagnosis and prognosis. Furthermore, the high expression levels of AKAP8L were related to the worse overall survival (OS), disease-specific survival (DSS) as well as progression-free interval (PFI) of KIRC with statistical significance, especially among distinct clinical subgroups of KIRC. To sum up, AKAP8L has the potential to serve as a critical molecular biomarker for the diagnosis and prognosis of pancancer, an independent prognostic risk factor of KIRC, and a novel molecular target for cancer therapies.
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Affiliation(s)
- Libo Zhou
- Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, P.R. China
| | - Jinhong Mei
- Department of Pathology, The First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, P.R. China
| | - Runfu Cao
- Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, P.R. China
| | - Xiaoqiang Liu
- Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, P.R. China
| | - Bin Fu
- Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, P.R. China
| | - Ming Ma
- Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, P.R. China
| | - Binbin Gong
- Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, P.R. China
| | - Lianmin Luo
- Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, P.R. China
| | - Yifu Liu
- Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, P.R. China
| | - Qiqi Zhu
- Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, P.R. China
| | - Xuan Meng
- Department of Pathology, The First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, P.R. China
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20
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Golatkar V, Bhatt LK. mAKAPβ signalosome: A potential target for cardiac hypertrophy. Drug Dev Res 2023; 84:1072-1084. [PMID: 37203301 DOI: 10.1002/ddr.22081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 03/05/2023] [Accepted: 05/06/2023] [Indexed: 05/20/2023]
Abstract
Pathological cardiac hypertrophy is the result of a prolonged increase in the workload of the heart that activates various signaling pathways such as MAPK pathway, PKA-dependent cAMP signaling, and CaN-NFAT signaling pathway which further activates genes for cardiac remodeling. Various signalosomes are present in the heart that regulates the signaling of physiological and pathological cardiac hypertrophy. mAKAPβ is one such scaffold protein that regulates signaling pathways involved in promoting cardiac hypertrophy. It is present in the outer nuclear envelope of the cardiomyocytes, which provides specificity of the target toward the heart. In addition, nuclear translocation of signaling components and transcription factors such as MEF2D, NFATc, and HIF-1α is facilitated due to the localization of mAKAPβ near the nuclear envelope. These factors are required for activation of genes promoting cardiac remodeling. Downregulation of mAKAPβ improves cardiac function and attenuates cardiac hypertrophy which in turn prevents the development of heart failure. Unlike earlier therapies for heart failure, knockout or silencing of mAKAPβ is not associated with side effects because of its high specificity in the striated myocytes. Downregulating expression of mAKAPβ is a favorable therapeutic approach toward attenuating cardiac hypertrophy and hence preventing heart failure. This review discusses mAKAPβ signalosome as a potential target for cardiac hypertrophy intervention.
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Affiliation(s)
- Vaishnavi Golatkar
- Department of Pharmacology, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Vile Parle (W), Mumbai, India
| | - Lokesh K Bhatt
- Department of Pharmacology, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Vile Parle (W), Mumbai, India
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21
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Shi Y, Xu X, He Z, Tao H, Chen Y, Zhang L, Tao S, Ding B, Wang C, Yu L. AKAP12 and IGFBP4 Are Prognostic Factors for Chronic Lymphocytic Leukemia. Acta Haematol 2023; 146:473-480. [PMID: 37605556 DOI: 10.1159/000530618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Accepted: 03/23/2023] [Indexed: 08/23/2023]
Abstract
INTRODUCTION The aim of this study was to develop a prognostic model for chronic lymphocytic leukemia (CLL). METHODS GEO2R was used to retrieve the gene expression data of CLL and normal B cells from the Gene Expression Omnibus (GEO; GSE22529 and GSE50006 datasets) database. Practical Extraction and Report Language was used to extract the gene expression and overall survival (OS) data of CLL patients from the Chronic Lymphocytic Leukemia - ES (CLLE-ES) project in the International Cancer Genome Consortium (ICGC) database. Cox regression with Lasso was used to create and validate a prognostic model for CLL. RESULTS A total of 267 genes exhibited differential expression between CLL and normal B cells. Cox univariate analysis identified 14 DEGs that correlated with OS. Lasso multivariate evaluation demonstrated that AKAP12 and IGFBP4 are independent prognostic factors for CLL. Kaplan-Meier survival analysis revealed a significant association between the estimated risk score and survival. The area under the receiver operating characteristic curve was calculated to be 0.97, indicating high predictive accuracy. In addition, high AKAP12 and IGFBP4 risk scores were associated with the high incidence of trisomy 12q. CONCLUSION Taken together, AKAP12 and IGFBP4 are independent prognostic factors for CLL.
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Affiliation(s)
- Yuye Shi
- Department of Hematology, The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, Huai'an, China
| | - Xiaohu Xu
- Department of Hematology, The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, Huai'an, China
| | - Zhengmei He
- Department of Hematology, The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, Huai'an, China
| | - Hong Tao
- Department of Hematology, The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, Huai'an, China
| | - Yue Chen
- Department of Hematology, The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, Huai'an, China
| | - Lijuan Zhang
- Department of Hematology, The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, Huai'an, China
| | - Shandong Tao
- Department of Hematology, The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, Huai'an, China
| | - Banghe Ding
- Department of Hematology, The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, Huai'an, China
| | - Chunling Wang
- Department of Hematology, The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, Huai'an, China
| | - Liang Yu
- Department of Hematology, The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, Huai'an, China
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22
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Collins KB, Scott JD. Phosphorylation, compartmentalization, and cardiac function. IUBMB Life 2023; 75:353-369. [PMID: 36177749 PMCID: PMC10049969 DOI: 10.1002/iub.2677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 09/15/2022] [Indexed: 11/08/2022]
Abstract
Protein phosphorylation is a fundamental element of cell signaling. First discovered as a biochemical switch in glycogen metabolism, we now know that this posttranslational modification permeates all aspects of cellular behavior. In humans, over 540 protein kinases attach phosphate to acceptor amino acids, whereas around 160 phosphoprotein phosphatases remove phosphate to terminate signaling. Aberrant phosphorylation underlies disease, and kinase inhibitor drugs are increasingly used clinically as targeted therapies. Specificity in protein phosphorylation is achieved in part because kinases and phosphatases are spatially organized inside cells. A prototypic example is compartmentalization of the cyclic adenosine 3',5'-monophosphate (cAMP)-dependent protein kinase A through association with A-kinase anchoring proteins. This configuration creates autonomous signaling islands where the anchored kinase is constrained in proximity to activators, effectors, and selected substates. This article primarily focuses on A kinase anchoring protein (AKAP) signaling in the heart with an emphasis on anchoring proteins that spatiotemporally coordinate excitation-contraction coupling and hypertrophic responses.
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Affiliation(s)
- Kerrie B. Collins
- Department of Pharmacology, University of Washington, School of Medicine, 1959 NE Pacific Ave, Seattle WA, 98195
| | - John D. Scott
- Department of Pharmacology, University of Washington, School of Medicine, 1959 NE Pacific Ave, Seattle WA, 98195
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23
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Herzog LE, Wang L, Yu E, Choi S, Farsi Z, Song BJ, Pan JQ, Sheng M. Mouse mutants in schizophrenia risk genes GRIN2A and AKAP11 show EEG abnormalities in common with schizophrenia patients. Transl Psychiatry 2023; 13:92. [PMID: 36914641 PMCID: PMC10011509 DOI: 10.1038/s41398-023-02393-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 02/28/2023] [Accepted: 03/02/2023] [Indexed: 03/16/2023] Open
Abstract
Schizophrenia is a heterogeneous psychiatric disorder with a strong genetic basis, whose etiology and pathophysiology remain poorly understood. Exome sequencing studies have uncovered rare, loss-of-function variants that greatly increase risk of schizophrenia [1], including loss-of-function mutations in GRIN2A (aka GluN2A or NR2A, encoding the NMDA receptor subunit 2A) and AKAP11 (A-Kinase Anchoring Protein 11). AKAP11 and GRIN2A mutations are also associated with bipolar disorder [2], and epilepsy and developmental delay/intellectual disability [1, 3, 4], respectively. Accessible in both humans and rodents, electroencephalogram (EEG) recordings offer a window into brain activity and display abnormal features in schizophrenia patients. Does loss of Grin2a or Akap11 in mice also result in EEG abnormalities? We monitored EEG in heterozygous and homozygous knockout Grin2a and Akap11 mutant mice compared with their wild-type littermates, at 3- and 6-months of age, across the sleep/wake cycle and during auditory stimulation protocols. Grin2a and Akap11 mutants exhibited increased resting gamma power, attenuated auditory steady-state responses (ASSR) at gamma frequencies, and reduced responses to unexpected auditory stimuli during mismatch negativity (MMN) tests. Sleep spindle density was reduced in a gene dose-dependent manner in Akap11 mutants, whereas Grin2a mutants showed increased sleep spindle density. The EEG phenotypes of Grin2a and Akap11 mutant mice show a variety of abnormal features that overlap considerably with human schizophrenia patients, reflecting systems-level changes caused by Grin2a and Akap11 deficiency. These neurophysiologic findings further substantiate Grin2a and Akap11 mutants as genetic models of schizophrenia and identify potential biomarkers for stratification of schizophrenia patients.
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Affiliation(s)
- Linnea E Herzog
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA.
| | - Lei Wang
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Eunah Yu
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Soonwook Choi
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Zohreh Farsi
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Bryan J Song
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Jen Q Pan
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Morgan Sheng
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA.
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA.
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24
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Zhang Y, Jeske NA. A-kinase anchoring protein 79/150 coordinates α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor sensitization in sensory neurons. Mol Pain 2023; 19:17448069231222406. [PMID: 38073552 PMCID: PMC10722943 DOI: 10.1177/17448069231222406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 11/30/2023] [Accepted: 11/30/2023] [Indexed: 12/17/2023] Open
Abstract
Changes in sensory afferent activity contribute to the transition from acute to chronic pain. However, it is unlikely that a single sensory receptor is entirely responsible for persistent pain. It is more probable that extended changes to multiple receptor proteins expressed by afferent neurons support persistent pain. A-Kinase Anchoring Protein 79/150 (AKAP) is an intracellular scaffolding protein expressed in sensory neurons that spatially and temporally coordinates signaling events. Since AKAP scaffolds biochemical modifications of multiple TRP receptors linked to pain phenotypes, we probed for other ionotropic receptors that may be mediated by AKAP and contribute to persistent pain. Here, we identify a role for AKAP modulation of α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic Acid Receptor (AMPA-R) functionality in sensory neurons. Pharmacological manipulation of distinct AMPA-R subunits significantly reduces persistent mechanical hypersensitivity observed during hyperalgesic priming. Stimulation of both protein kinases C and A (PKC, PKA, respectively) modulate AMPA-R subunit GluR1 and GluR2 phosphorylation and surface expression in an AKAP-dependent manner in primary cultures of DRG neurons. Furthermore, AKAP knock out reduces sensitized AMPA-R responsivity in DRG neurons. Collectively, these data indicate that AKAP scaffolds AMPA-R subunit organization in DRG neurons that may contribute to the transition from acute-to-chronic pain.
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Affiliation(s)
- Yan Zhang
- Department of Oral and Maxillofacial Surgery, University of Texas Health San Antonio, San Antonio, TX, USA
| | - Nathaniel A Jeske
- Department of Oral and Maxillofacial Surgery, University of Texas Health San Antonio, San Antonio, TX, USA
- Department of Pharmacology, University of Texas Health San Antonio, San Antonio, TX, USA
- Department of Physiology, University of Texas Health San Antonio, San Antonio, TX, USA
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25
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Huynh MT, Proust A, Bouligand J, Popescu E. AKAP9-Related Channelopathy: Novel Pathogenic Variant and Review of the Literature. Genes (Basel) 2022; 13:2167. [PMID: 36421840 PMCID: PMC9690169 DOI: 10.3390/genes13112167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/16/2022] [Accepted: 11/18/2022] [Indexed: 08/30/2023] Open
Abstract
Disease-associated pathogenic variants in the A-Kinase Anchor Protein 9 (AKAP9) (MIM *604001) have been recently identified in patients with autosomal dominant long QT syndrome 11 (MIM #611820), lethal arrhythmia (ventricular fibrillation, polymorphic ventricular tachycardia), Brugada syndrome, and sudden unexpected death. However, AKAP9 sequence variations were rarely reported and AKAP9 was classified as a "disputed evidence" gene to support disease causation due to the insufficient genetic evidence and a limited number of reported AKAP9-mutated patients. Here, we describe a 47-year-old male carrying a novel frameshift AKAP9 pathogenic variant who presented recurrent syncopal attacks and sudden cardiac arrest that required a semi-automatic external defibrillator implant and an electric shock treatment of ventricular arrhythmia. This study provides insight into the mechanism underlying cardiac arrest and confirms that AKAP9 loss-of-function variants predispose to serious, life-threatening ventricular arrhythmias.
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Affiliation(s)
- Minh-Tuan Huynh
- Centre Hospitalier du Havre, Unité de Génétique Clinique, 29 Avenue Pierre Mendès-France, 76290 Montivilliers, France
- Laboratoire de Génétique Moléculaire, Pharmacogénétique et Hormonologie, Hôpital Bicêtre, APHP Université Paris Saclay, 94270 Le Kremlin-Bicêtre, France; Inserm UMR_S 1185, Faculté de Médecine Paris Saclay, Université Paris Saclay, 94270 Le Kremlin-Bicêtre, France
| | - Alexis Proust
- Laboratoire de Génétique Moléculaire, Pharmacogénétique et Hormonologie, Hôpital Bicêtre, APHP Université Paris Saclay, 94270 Le Kremlin-Bicêtre, France; Inserm UMR_S 1185, Faculté de Médecine Paris Saclay, Université Paris Saclay, 94270 Le Kremlin-Bicêtre, France
| | - Jérôme Bouligand
- Laboratoire de Génétique Moléculaire, Pharmacogénétique et Hormonologie, Hôpital Bicêtre, APHP Université Paris Saclay, 94270 Le Kremlin-Bicêtre, France; Inserm UMR_S 1185, Faculté de Médecine Paris Saclay, Université Paris Saclay, 94270 Le Kremlin-Bicêtre, France
| | - Elena Popescu
- Centre Hospitalier du Havre, Service de Cardiologie, 29 Avenue Pierre Mendès-France, 76290 Montivilliers, France
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Ramani K, Mavila N, Abeynayake A, Tomasi ML, Wang J, Matsuda M, Seki E. Targeting A-kinase anchoring protein 12 phosphorylation in hepatic stellate cells regulates liver injury and fibrosis in mouse models. eLife 2022; 11:e78430. [PMID: 36193675 PMCID: PMC9531947 DOI: 10.7554/elife.78430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 08/03/2022] [Indexed: 12/24/2022] Open
Abstract
Trans-differentiation of hepatic stellate cells (HSCs) to activated state potentiates liver fibrosis through release of extracellular matrix (ECM) components, distorting the liver architecture. Since limited antifibrotics are available, pharmacological intervention targeting activated HSCs may be considered for therapy. A-kinase anchoring protein 12 (AKAP12) is a scaffolding protein that directs protein kinases A/C (PKA/PKC) and cyclins to specific locations spatiotemporally controlling their biological effects. It has been shown that AKAP12's scaffolding functions are altered by phosphorylation. In previously published work, observed an association between AKAP12 phosphorylation and HSC activation. In this work, we demonstrate that AKAP12's scaffolding activity toward the endoplasmic reticulum (ER)-resident collagen chaperone, heat-shock protein 47 (HSP47) is strongly inhibited by AKAP12's site-specific phosphorylation in activated HSCs. CRISPR-directed gene editing of AKAP12's phospho-sites restores its scaffolding toward HSP47, inhibiting HSP47's collagen maturation functions, and HSC activation. AKAP12 phospho-editing dramatically inhibits fibrosis, ER stress response, HSC inflammatory signaling, and liver injury in mice. Our overall findings suggest a pro-fibrogenic role of AKAP12 phosphorylation that may be targeted for therapeutic intervention in liver fibrosis.
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Affiliation(s)
- Komal Ramani
- Karsh Division of Gastroenterology and Hepatology, Cedars-Sinai Medical CenterLos AngelesUnited States
- Applied Cell Biology Division, Department of Biomedical Sciences, Cedars-Sinai Medical CenterLos AngelesUnited States
| | - Nirmala Mavila
- Karsh Division of Gastroenterology and Hepatology, Cedars-Sinai Medical CenterLos AngelesUnited States
- Applied Cell Biology Division, Department of Biomedical Sciences, Cedars-Sinai Medical CenterLos AngelesUnited States
| | - Aushinie Abeynayake
- Karsh Division of Gastroenterology and Hepatology, Cedars-Sinai Medical CenterLos AngelesUnited States
| | - Maria Lauda Tomasi
- Karsh Division of Gastroenterology and Hepatology, Cedars-Sinai Medical CenterLos AngelesUnited States
- Applied Cell Biology Division, Department of Biomedical Sciences, Cedars-Sinai Medical CenterLos AngelesUnited States
| | - Jiaohong Wang
- Karsh Division of Gastroenterology and Hepatology, Cedars-Sinai Medical CenterLos AngelesUnited States
| | - Michitaka Matsuda
- Karsh Division of Gastroenterology and Hepatology, Cedars-Sinai Medical CenterLos AngelesUnited States
| | - Eki Seki
- Karsh Division of Gastroenterology and Hepatology, Cedars-Sinai Medical CenterLos AngelesUnited States
- Applied Cell Biology Division, Department of Biomedical Sciences, Cedars-Sinai Medical CenterLos AngelesUnited States
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27
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Ma N, Liu H, Zhang Y, Liu W, Liang Z, Wang Q, Sun Y, Wang L, Li Y, Ren H, Dong Y. Identification of CD8+ T-cell epitope from multiple myeloma-specific antigen AKAP4. Front Immunol 2022; 13:927804. [PMID: 35967402 PMCID: PMC9366082 DOI: 10.3389/fimmu.2022.927804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 07/06/2022] [Indexed: 11/13/2022] Open
Abstract
Multiple myeloma (MM) is a malignant plasma cell disorder affecting mainly the elderly population. Revolutionary progress in immunotherapy has been made recently, including monoclonal antibodies and chimeric antigen receptor T cell (CAR-T) therapies; however, the high relapse rate remains problematic. Therefore, combination therapies against different targets would be a reasonable strategy. In this study, we present a new X-chromosome encoded testis-cancer antigen (CTA) AKAP4 as a potential target for MM. AKAP4 is expressed in MM cell lines and MM primary malignant plasma cells. HLA-A*0201-restricted cytotoxic T lymphocytes (CTLs) induced by dendritic cells (DCs) transduced with an adenovirus vector encoding the full-length AKAP4 gene were demonstrated to lyse AKAP4+ myeloma cells. Seven of the 12 candidate epitopes predicated by the BIMAS and SYFPEITH algorithms were able to bind HLA-A*0201 in the T2 binding assay, of which only two peptides were able to induce CTL cytotoxicity in the co-culture of peptide-loaded human mature dendritic cells and the autologous peripheral blood mononuclear cells (PBMCs) from the same HLA-A*0201 donor. The AKAP4 630–638 VLMLIQKLL was identified as the strongest CTL epitope by the human IFN-γ ELISPOT assay. Finally, the VLMLIQKLL-specific CTLs can lyse the HLA-A*0201+AKAP4+ myeloma cell line U266 in vitro, and inhibit tumor growth in the mice bearing U266 tumors in vivo. These results suggest that the VLMLIQKLL epitope could be used to develop cancer vaccine or T-cell receptor transgenic T cells (TCR-T) to kill myeloma cells.
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Affiliation(s)
| | - Huihui Liu
- *Correspondence: Huihui Liu, ; Yujun Dong,
| | | | | | | | | | | | | | | | | | - Yujun Dong
- *Correspondence: Huihui Liu, ; Yujun Dong,
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28
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Abstract
A kinase anchoring protein (AKAP) 12 is a scaffolding protein that improves the specificity and efficiency of spatiotemporal signal through assembling intracellular signal proteins into a specific complex. AKAP12 is a negative mitogenic regulator that plays an important role in controlling cytoskeletal architecture, maintaining endothelial integrity, regulating glial function and forming blood-brain barrier (BBB) and blood retinal barrier (BRB). Moreover, elevated or reduced AKAP12 contributes to a variety of diseases. Complex connections between AKAP12 and various diseases including chronic liver diseases (CLDs), inflammatory diseases and a series of cancers will be tried to delineate in this paper. We first describe the expression, distribution and physiological function of AKAP12. Then we summarize the current knowledge of different connections between AKAP12 expression and various diseases. Some research groups have found paradoxical roles of AKAP12 in different diseases and further confirmation is needed. This paper aims to assess the role of AKAP12 in physiology and diseases to help lay the foundation for the design of small molecules for specific AKAP12 to correct the pathological signal defects.
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Affiliation(s)
- Hui Li
- Central Laboratory, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan Province, P. R. China
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29
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Abstract
In the current study, we aimed to study the effect of miR-146a on proliferation and migration in an in vitro diabetic foot ulcer (DFU) model by targeting A-kinase-anchoring protein 12 (AKAP12). An in vitro DFU model was initially established using HaCaT cells derived from human keratinocytes and induced by advanced glycation end products (AGEs). The effects of overexpression of miR-146a on proliferation and migration ability were analysed. The expression levels of miR-146a and AKAP12 were measured by quantitative real-time polymerase chain reaction (qRT-PCR), and AKAP12, hypoxia-inducible factor-1α (HIF-1α), Wnt3a and β-catenin protein levels were measured by western blotting. The cell proliferation ability was measured by MTT, and the migration ability was analysed by a cell scratch assay. The binding between miR-146a and AKAP12 was identified using a luciferase reporter assay. The results demonstrated that AGEs significantly suppressed cell proliferation and migration, while the expression of miR-146a decreased and the expression of AKAP12 increased. A luciferase reporter assay revealed that miR-146a could directly target AKAP12. Overexpression of miR-146a promoted cell proliferation and migration in an in vitro DFU model and also promoted the expression of HIF-1α, Wnt3a and β-catenin but suppressed the expression of AKAP12. Co-overexpression of miR-146a and AKAP12 reversed the effect of miR-146a on cell proliferation and migration. Our findings revealed that miR-146a directly targeted AKAP12 and promoted cell proliferation and migration in an in vitro DFU model. This study provides a new perspective for the study of miR-146a in the treatment of DFU.
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Affiliation(s)
- Han-Chong Zhang
- Department of Emergency Medicine, Second Xiangya Hospital, Central South University, Changsha 410011, Hunan Province, P.R. China
- Emergency Medicine and Difficult Diseases Institute, Second Xiangya Hospital, Central South University, Changsha 410011, Hunan Province, P.R. China
| | - Tie Wen
- Department of Emergency Medicine, Second Xiangya Hospital, Central South University, Changsha 410011, Hunan Province, P.R. China
- Emergency Medicine and Difficult Diseases Institute, Second Xiangya Hospital, Central South University, Changsha 410011, Hunan Province, P.R. China
| | - Yu-Zhong Cai
- Department of Emergency Medicine, Second Xiangya Hospital, Central South University, Changsha 410011, Hunan Province, P.R. China
- Emergency Medicine and Difficult Diseases Institute, Second Xiangya Hospital, Central South University, Changsha 410011, Hunan Province, P.R. China
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Maric D, Paterek A, Delaunay M, López IP, Arambasic M, Diviani D. A-Kinase Anchoring Protein 2 Promotes Protection against Myocardial Infarction. Cells 2021; 10:2861. [PMID: 34831084 PMCID: PMC8616452 DOI: 10.3390/cells10112861] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 10/20/2021] [Accepted: 10/21/2021] [Indexed: 12/25/2022] Open
Abstract
Myocardial infarction (MI) is a leading cause of maladaptive cardiac remodeling and heart failure. In the damaged heart, loss of function is mainly due to cardiomyocyte death and remodeling of the cardiac tissue. The current study shows that A-kinase anchoring protein 2 (AKAP2) orchestrates cellular processes favoring cardioprotection in infarcted hearts. Induction of AKAP2 knockout (KO) in cardiomyocytes of adult mice increases infarct size and exacerbates cardiac dysfunction after MI, as visualized by increased left ventricular dilation and reduced fractional shortening and ejection fraction. In cardiomyocytes, AKAP2 forms a signaling complex with PKA and the steroid receptor co-activator 3 (Src3). Upon activation of cAMP signaling, the AKAP2/PKA/Src3 complex favors PKA-mediated phosphorylation and activation of estrogen receptor α (ERα). This results in the upregulation of ER-dependent genes involved in protection against apoptosis and angiogenesis, including Bcl2 and the vascular endothelial growth factor a (VEGFa). In line with these findings, cardiomyocyte-specific AKAP2 KO reduces Bcl2 and VEGFa expression, increases myocardial apoptosis and impairs the formation of new blood vessels in infarcted hearts. Collectively, our findings suggest that AKAP2 organizes a transcriptional complex that mediates pro-angiogenic and anti-apoptotic responses that protect infarcted hearts.
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Affiliation(s)
- Darko Maric
- Department of Biomedical Sciences, Faculty of Biology and Medicine, University of Lausanne, 1011 Lausanne, Switzerland; (D.M.); (A.P.); (M.D.); (I.P.L.); (M.A.)
- Section of Medicine, Department of Endocrinology, Metabolism and Cardiovascular System, University of Fribourg, 1700 Fribourg, Switzerland
| | - Aleksandra Paterek
- Department of Biomedical Sciences, Faculty of Biology and Medicine, University of Lausanne, 1011 Lausanne, Switzerland; (D.M.); (A.P.); (M.D.); (I.P.L.); (M.A.)
| | - Marion Delaunay
- Department of Biomedical Sciences, Faculty of Biology and Medicine, University of Lausanne, 1011 Lausanne, Switzerland; (D.M.); (A.P.); (M.D.); (I.P.L.); (M.A.)
| | - Irene Pérez López
- Department of Biomedical Sciences, Faculty of Biology and Medicine, University of Lausanne, 1011 Lausanne, Switzerland; (D.M.); (A.P.); (M.D.); (I.P.L.); (M.A.)
| | - Miroslav Arambasic
- Department of Biomedical Sciences, Faculty of Biology and Medicine, University of Lausanne, 1011 Lausanne, Switzerland; (D.M.); (A.P.); (M.D.); (I.P.L.); (M.A.)
| | - Dario Diviani
- Department of Biomedical Sciences, Faculty of Biology and Medicine, University of Lausanne, 1011 Lausanne, Switzerland; (D.M.); (A.P.); (M.D.); (I.P.L.); (M.A.)
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Sanderson JL, Freund RK, Gorski JA, Dell'Acqua ML. β-Amyloid disruption of LTP/LTD balance is mediated by AKAP150-anchored PKA and Calcineurin regulation of Ca 2+-permeable AMPA receptors. Cell Rep 2021; 37:109786. [PMID: 34610314 PMCID: PMC8530450 DOI: 10.1016/j.celrep.2021.109786] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 07/02/2021] [Accepted: 09/10/2021] [Indexed: 01/28/2023] Open
Abstract
Regulated insertion and removal of postsynaptic AMPA glutamate receptors (AMPARs) mediates hippocampal long-term potentiation (LTP) and long-term depression (LTD) synaptic plasticity underlying learning and memory. In Alzheimer’s disease β-amyloid (Aβ) oligomers may impair learning and memory by altering AMPAR trafficking and LTP/LTD balance. Importantly, Ca2+-permeable AMPARs (CP-AMPARs) assembled from GluA1 subunits are excluded from hippocampal synapses basally but can be recruited rapidly during LTP and LTD to modify synaptic strength and signaling. By employing mouse knockin mutations that disrupt anchoring of the kinase PKA or phosphatase Calcineurin (CaN) to the postsynaptic scaffold protein AKAP150, we find that local AKAP-PKA signaling is required for CP-AMPAR recruitment, which can facilitate LTP but also, paradoxically, prime synapses for Aβ impairment of LTP mediated by local AKAP-CaN LTD signaling that promotes subsequent CP-AMPAR removal. These findings highlight the importance of PKA/CaN signaling balance and CP-AMPARs in normal plasticity and aberrant plasticity linked to disease. In Alzheimer’s disease, Aβ oligomers disrupt hippocampal neuronal plasticity and cognition. Sanderson et al. show how the postsynaptic scaffold protein AKAP150 coordinates PKA and Calcineurin regulation of Ca2+-permeable AMPA-type glutamate receptors to mediate disruption of synaptic plasticity by Aβ oligomers.
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Affiliation(s)
- Jennifer L Sanderson
- Department of Pharmacology, University of Colorado School of Medicine, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Ronald K Freund
- Department of Pharmacology, University of Colorado School of Medicine, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Jessica A Gorski
- Department of Pharmacology, University of Colorado School of Medicine, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Mark L Dell'Acqua
- Department of Pharmacology, University of Colorado School of Medicine, Anschutz Medical Campus, Aurora, CO 80045, USA; University of Colorado Alzheimer's and Cognition Center, Anschutz Medical Campus, Aurora, CO 80045, USA; Linda Crnic Institute for Down Syndrome, Anschutz Medical Campus, Aurora, CO 80045, USA.
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Cross CI, Driggers PH, McCarthy BE, Diab M, Brennan J, Segars JH. A-kinase anchoring protein 13 interacts with the vitamin D receptor to alter vitamin D-dependent gene activation in uterine leiomyoma cells. F S Sci 2021; 2:303-314. [PMID: 35560280 DOI: 10.1016/j.xfss.2021.04.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 04/08/2021] [Indexed: 06/15/2023]
Abstract
OBJECTIVE To determine if A-kinase anchoring protein 13 (AKAP13) interacts with the vitamin D receptor (VDR) to alter vitamin D-dependent signaling in fibroid cells. Uterine leiomyomas (fibroids) are characterized by a fibrotic extracellular matrix and are associated with vitamin D deficiency. Treatment with vitamin D (1,25-dihydroxyvitamin D3) reduces fibroid growth and extracellular matrix gene expression. A-kinase anchoring protein 13 is overexpressed in fibroids and interacts with nuclear hormone receptors, but it is not known whether AKAP13 may interact with the VDR to affect vitamin D signaling in fibroids. DESIGN Laboratory studies. SETTING Translational science laboratory. INTERVENTION(S) Human immortalized fibroid or myometrial cells were treated with 1,25-hydroxyvitamin D3 (1,25(OH)2D3) and transfected using expression constructs for AKAP13 or AKAP13 mutants, RhoQL, C3 transferase, or small interfering ribonucleic acids (RNAs). MAIN OUTCOME MEASURE(S) Messenger ribonucleic acid (mRNA) levels of AKAP13, fibromodulin, and versican as measured by quantitative real-time polymerase chain reaction. Glutathione S-transferase-binding assays. Vitamin D-dependent gene activation as measured by luciferase assays. RESULT(S) 1,25(OH)2D3 resulted in a significant reduction in mRNA levels encoding AKAP13, versican, and fibromodulin. Small interfering RNA silencing of AKAP13 decreased both fibromodulin and versican mRNA levels. Glutathione S-transferase-binding assays revealed that AKAP13 bound to the VDR through its nuclear receptor interacting region. Cotransfection of AKAP13 and VDR significantly reduced vitamin D-dependent gene activation. RhoA pathway inhibition partially relieved repression of vitamin D-dependent gene activation by AKAP13. CONCLUSION(S) These data suggest that AKAP13 inhibited the vitamin D receptor activation by a mechanism that required, at least in part, RhoA activation.
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Affiliation(s)
- Chantel I Cross
- Department of Gynecology and Obstetrics, Division of Reproductive Endocrinology and Infertility, Johns Hopkins University School of Medicine, Baltimore, Maryland.
| | - Paul H Driggers
- Department of Gynecology and Obstetrics, Division of Reproductive Sciences and Women's Health Research, Johns Hopkins Medicine, Baltimore, Maryland
| | - Breanne E McCarthy
- Department of Gynecology and Obstetrics, Division of Reproductive Endocrinology and Infertility, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Maya Diab
- BS, American University of Beirut Medical Center, Beirut, Lebanon
| | - Joshua Brennan
- Department of Gynecology and Obstetrics, Division of Reproductive Sciences and Women's Health Research, Johns Hopkins Medicine, Baltimore, Maryland
| | - James H Segars
- Department of Gynecology and Obstetrics, Division of Reproductive Sciences and Women's Health Research, Johns Hopkins Medicine, Baltimore, Maryland
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Kar P, Lin YP, Bhardwaj R, Tucker CJ, Bird GS, Hediger MA, Monico C, Amin N, Parekh AB. The N terminus of Orai1 couples to the AKAP79 signaling complex to drive NFAT1 activation by local Ca 2+ entry. Proc Natl Acad Sci U S A 2021; 118:e2012908118. [PMID: 33941685 PMCID: PMC8126794 DOI: 10.1073/pnas.2012908118] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
To avoid conflicting and deleterious outcomes, eukaryotic cells often confine second messengers to spatially restricted subcompartments. The smallest signaling unit is the Ca2+ nanodomain, which forms when Ca2+ channels open. Ca2+ nanodomains arising from store-operated Orai1 Ca2+ channels stimulate the protein phosphatase calcineurin to activate the transcription factor nuclear factor of activated T cells (NFAT). Here, we show that NFAT1 tethered directly to the scaffolding protein AKAP79 (A-kinase anchoring protein 79) is activated by local Ca2+ entry, providing a mechanism to selectively recruit a transcription factor. We identify the region on the N terminus of Orai1 that interacts with AKAP79 and demonstrate that this site is essential for physiological excitation-transcription coupling. NMR structural analysis of the AKAP binding domain reveals a compact shape with several proline-driven turns. Orai2 and Orai3, isoforms of Orai1, lack this region and therefore are less able to engage AKAP79 and activate NFAT. A shorter, naturally occurring Orai1 protein that arises from alternative translation initiation also lacks the AKAP79-interaction site and fails to activate NFAT1. Interfering with Orai1-AKAP79 interaction suppresses cytokine production, leaving other Ca2+ channel functions intact. Our results reveal the mechanistic basis for how a subtype of a widely expressed Ca2+ channel is able to activate a vital transcription pathway and identify an approach for generation of immunosuppressant drugs.
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Affiliation(s)
- Pulak Kar
- Department of Physiology, Anatomy and Genetics, Oxford University, Oxford OX1 3PT, United Kingdom
| | - Yu-Ping Lin
- Department of Physiology, Anatomy and Genetics, Oxford University, Oxford OX1 3PT, United Kingdom
- Laboratory of Signal Transduction, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC 27709
| | - Rajesh Bhardwaj
- Department of Nephrology and Hypertension, University Hospital Bern, Inselspital, 3010 Bern, Switzerland
| | - Charles J Tucker
- Laboratory of Signal Transduction, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC 27709
| | - Gary S Bird
- Laboratory of Signal Transduction, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC 27709
| | - Matthias A Hediger
- Department of Nephrology and Hypertension, University Hospital Bern, Inselspital, 3010 Bern, Switzerland
| | - Carina Monico
- Micron Oxford Advanced Bioimaging Unit, Department of Biochemistry, Oxford University, Oxford OX1 3QU, United Kingdom
| | - Nader Amin
- Department of Chemistry, Oxford University, Oxford OX1 3TA, United Kingdom
| | - Anant B Parekh
- Department of Physiology, Anatomy and Genetics, Oxford University, Oxford OX1 3PT, United Kingdom;
- Laboratory of Signal Transduction, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC 27709
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Wang B, Jiang B, Li Y, Dai Y, Li P, Li L, Xu J, Li L, Wu P. AKAP2 overexpression modulates growth plate chondrocyte functions through ERK1/2 signaling. Bone 2021; 146:115875. [PMID: 33571699 DOI: 10.1016/j.bone.2021.115875] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 01/02/2021] [Accepted: 01/29/2021] [Indexed: 10/22/2022]
Abstract
In our previous study, the mutation c.2645A > C (p. E882A) was found in the A-Kinase Anchoring Protein 2 (AKAP2) gene, which plays an important role in regulating the development of the skeletal system; however, the specific effect of AKAP2 on chondrocyte proliferation and differentiation and the potential mechanism are still not clear. In the present study, we investigated the effect of AKAP2 in vitro. We successfully isolated human growth plate chondrocytes (GPCs) from growth plate cartilage tissues and identified GPCs by aggrecan expression and flow cytometric analysis. AKAP2 overexpression significantly promoted GPC proliferation, enhanced GPC differentiation, and promoted extracellular matrix (ECM) synthesis, whereas AKAP2 silencing exerted the opposite effects on GPCs. AKAP2 overexpression increased, while AKAP2 silencing decreased, the protein levels of p-extracellular regulated protein kinases (ERK)1/2. More importantly, the promotive effects of AKAP2 overexpression on GPC proliferation, differentiation, and ECM synthesis were significantly reversed by the ERK1/2 signaling antagonist U0126, suggesting that AKAP2 enhances GPC functions through ERK1/2 signaling. In conclusion, we demonstrate AKAP2 overexpression-induced enhancement of GPC functions through ERK1/2 signaling. Considering the critical role of GPC functions in adolescent idiopathic scoliosis (AIS) pathogenesis, the application of AKAP2 targeting in AIS treatment should be investigated in future studies.
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Affiliation(s)
- Bing Wang
- Department of Spine Surgery, The Second Xiangya Hospital, Central South University, China
| | - Bin Jiang
- Department of Spine Surgery, The Second Xiangya Hospital, Central South University, China
| | - Yawei Li
- Department of Spine Surgery, The Second Xiangya Hospital, Central South University, China.
| | - Yuliang Dai
- Department of Spine Surgery, The Second Xiangya Hospital, Central South University, China
| | - Pengzhi Li
- Department of Spine Surgery, The Second Xiangya Hospital, Central South University, China
| | - Lei Li
- Department of Spine Surgery, The Second Xiangya Hospital, Central South University, China
| | - Jietao Xu
- Department of Spine Surgery, The Second Xiangya Hospital, Central South University, China
| | - Li Li
- Department of Spine Surgery, The Second Xiangya Hospital, Central South University, China
| | - Pengfei Wu
- Center for Medical Genetics, School of Life Sciences, Central South University, China
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Zhu M, Liang Q, Chen T, Kong Q, Ye G, Yu S, Li X, He Q, Liu H, Hu Y, Yu J, Li G. Identification and validation of methylated differentially expressed miRNAs and immune infiltrate profile in EBV-associated gastric cancer. Clin Epigenetics 2021; 13:22. [PMID: 33514440 PMCID: PMC7845045 DOI: 10.1186/s13148-020-00989-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 12/01/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND The recent discovery of cancer/tissue specificity of miRNA has indicated its great potential as a therapeutic target. In Epstein-Barr virus-associated gastric cancer (EBVaGC), host genes are affected by extensive DNA methylation, including miRNAs. However, the role of methylated miRNA in the development of EBVaGC and immune cell infiltration has largely remained elusive. RESULTS After crossmatching the DNA methylation and expression profile of miRNA and mRNA in the Gene Expression Omnibus (GEO) and the Cancer Genome Atlas Research Network (TCGA), we discovered that miR-129-2-3p was significantly suppressed due to hypermethylation on its enhancer in EBVaGC. The differentially expressed genes (DEGs) added up to 30, among which AKAP12 and LARP6 were predicted to be the target genes of miR-129-2-3p and negatively correlated with patients' survival. Accordingly, miR-129-2-3p was significantly down-regulated in tumor samples in 26 (65%) out of 40 cases in our cohort (P < 0.0001). The proliferation, migration and invasion functions of GC cells were significantly promoted when transfected with miR-129-2-3p inhibitor and suppressed when transfected with mimics or treated with 5-aza-2'-deoxycytidine. Moreover, a comprehensive regulation network was established by combining the putative transcription factors, miRNA-mRNA and protein-protein interaction (PPI) analysis. Pathway enrichment analysis showed that cytokine activity, especially CCL20, was the most prominent biological process in EBVaGC development. Immune cell infiltration analysis demonstrated CD4+ T cell, macrophage and dendritic cell infiltrates were significantly enriched for the prognostic-indicated hub genes. CONCLUSION This study has provided a comprehensive analysis of differentially expressed miRNAs and mRNAs associated with genome-wide DNA methylation by integrating multi-source data including transcriptome, methylome and clinical data from GEO and TCGA, QPCR of tumor samples and cell function assays. It also gives a hint on the relationships between methylated miRNA, DEGs and the immune infiltration. Further experimental and clinical investigations are warranted to explore the underlying mechanism and validate our findings.
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Affiliation(s)
- Mansheng Zhu
- Department of General Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, 510515, China
| | - Qixiang Liang
- Department of Stomatology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China
| | - Tao Chen
- Department of General Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, 510515, China.
| | - Qian Kong
- Department of Pediatrics, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China
| | - Gengtai Ye
- Department of General Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, 510515, China
| | - Shitong Yu
- Department of General Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, 510515, China
| | - Xunjun Li
- Department of General Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, 510515, China
| | - Qinglie He
- Department of General Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, 510515, China
| | - Hao Liu
- Department of General Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, 510515, China
| | - Yanfeng Hu
- Department of General Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, 510515, China
| | - Jiang Yu
- Department of General Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, 510515, China.
| | - Guoxin Li
- Department of General Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, 510515, China.
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Tenner B, Getz M, Ross B, Ohadi D, Bohrer CH, Greenwald E, Mehta S, Xiao J, Rangamani P, Zhang J. Spatially compartmentalized phase regulation of a Ca 2+-cAMP-PKA oscillatory circuit. eLife 2020; 9:e55013. [PMID: 33201801 PMCID: PMC7671691 DOI: 10.7554/elife.55013] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 10/07/2020] [Indexed: 01/31/2023] Open
Abstract
Signaling networks are spatiotemporally organized to sense diverse inputs, process information, and carry out specific cellular tasks. In β cells, Ca2+, cyclic adenosine monophosphate (cAMP), and Protein Kinase A (PKA) exist in an oscillatory circuit characterized by a high degree of feedback. Here, we describe a mode of regulation within this circuit involving a spatial dependence of the relative phase between cAMP, PKA, and Ca2+. We show that in mouse MIN6 β cells, nanodomain clustering of Ca2+-sensitive adenylyl cyclases (ACs) drives oscillations of local cAMP levels to be precisely in-phase with Ca2+ oscillations, whereas Ca2+-sensitive phosphodiesterases maintain out-of-phase oscillations outside of the nanodomain. Disruption of this precise phase relationship perturbs Ca2+ oscillations, suggesting the relative phase within an oscillatory circuit can encode specific functional information. This work unveils a novel mechanism of cAMP compartmentation utilized for localized tuning of an oscillatory circuit and has broad implications for the spatiotemporal regulation of signaling networks.
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Affiliation(s)
- Brian Tenner
- Department of Biophysics and Biophysical Chemistry, The Johns Hopkins University School of MedicineBaltimoreUnited States
- Department of Pharmacology, University of California, San DiegoLa JollaUnited States
| | - Michael Getz
- Chemical Engineering Graduate Program, University of California, San DiegoLa JollaUnited States
| | - Brian Ross
- Department of Pharmacology, University of California, San DiegoLa JollaUnited States
| | - Donya Ohadi
- Department of Mechanical and Aerospace Engineering, University of California, San DiegoLa JollaUnited States
| | - Christopher H Bohrer
- Department of Biophysics and Biophysical Chemistry, The Johns Hopkins University School of MedicineBaltimoreUnited States
| | - Eric Greenwald
- Department of Pharmacology, University of California, San DiegoLa JollaUnited States
| | - Sohum Mehta
- Department of Pharmacology, University of California, San DiegoLa JollaUnited States
| | - Jie Xiao
- Department of Biophysics and Biophysical Chemistry, The Johns Hopkins University School of MedicineBaltimoreUnited States
| | - Padmini Rangamani
- Chemical Engineering Graduate Program, University of California, San DiegoLa JollaUnited States
- Department of Mechanical and Aerospace Engineering, University of California, San DiegoLa JollaUnited States
| | - Jin Zhang
- Department of Pharmacology, University of California, San DiegoLa JollaUnited States
- Department of Chemistry and Biochemistry, University of California, San DiegoLa JollaUnited States
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Prada MP, Syed AU, Reddy GR, Martín-Aragón Baudel M, Flores-Tamez VA, Sasse KC, Ward SM, Sirish P, Chiamvimonvat N, Bartels P, Dickson EJ, Hell JW, Scott JD, Santana LF, Xiang YK, Navedo MF, Nieves-Cintrón M. AKAP5 complex facilitates purinergic modulation of vascular L-type Ca 2+ channel Ca V1.2. Nat Commun 2020; 11:5303. [PMID: 33082339 PMCID: PMC7575592 DOI: 10.1038/s41467-020-18947-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 09/22/2020] [Indexed: 02/08/2023] Open
Abstract
The L-type Ca2+ channel CaV1.2 is essential for arterial myocyte excitability, gene expression and contraction. Elevations in extracellular glucose (hyperglycemia) potentiate vascular L-type Ca2+ channel via PKA, but the underlying mechanisms are unclear. Here, we find that cAMP synthesis in response to elevated glucose and the selective P2Y11 agonist NF546 is blocked by disruption of A-kinase anchoring protein 5 (AKAP5) function in arterial myocytes. Glucose and NF546-induced potentiation of L-type Ca2+ channels, vasoconstriction and decreased blood flow are prevented in AKAP5 null arterial myocytes/arteries. These responses are nucleated via the AKAP5-dependent clustering of P2Y11/ P2Y11-like receptors, AC5, PKA and CaV1.2 into nanocomplexes at the plasma membrane of human and mouse arterial myocytes. Hence, data reveal an AKAP5 signaling module that regulates L-type Ca2+ channel activity and vascular reactivity upon elevated glucose. This AKAP5-anchored nanocomplex may contribute to vascular complications during diabetic hyperglycemia.
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Affiliation(s)
- Maria Paz Prada
- Department of Pharmacology, University of California Davis, Davis, CA, 95616, USA
| | - Arsalan U Syed
- Department of Pharmacology, University of California Davis, Davis, CA, 95616, USA
| | - Gopireddy R Reddy
- Department of Pharmacology, University of California Davis, Davis, CA, 95616, USA
| | | | | | | | - Sean M Ward
- Department of Physiology and Cell Biology, University of Nevada Reno, Reno, NV, 89557, USA
| | - Padmini Sirish
- Department of Internal Medicine, University of California Davis, Davis, CA, 95616, USA
| | - Nipavan Chiamvimonvat
- Department of Pharmacology, University of California Davis, Davis, CA, 95616, USA
- Department of Internal Medicine, University of California Davis, Davis, CA, 95616, USA
- VA Northern California Healthcare System, Mather, CA, 95655, USA
| | - Peter Bartels
- Department of Pharmacology, University of California Davis, Davis, CA, 95616, USA
| | - Eamonn J Dickson
- Department of Physiology and Membrane Biology, University of California Davis, Davis, CA, 95616, USA
| | - Johannes W Hell
- Department of Pharmacology, University of California Davis, Davis, CA, 95616, USA
| | - John D Scott
- Department of Pharmacology, University of Washington Seattle, Seattle, WA, 98195, USA
| | - Luis F Santana
- Department of Physiology and Membrane Biology, University of California Davis, Davis, CA, 95616, USA
| | - Yang K Xiang
- Department of Pharmacology, University of California Davis, Davis, CA, 95616, USA
- VA Northern California Healthcare System, Mather, CA, 95655, USA
| | - Manuel F Navedo
- Department of Pharmacology, University of California Davis, Davis, CA, 95616, USA.
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Bucko PJ, Garcia I, Manocha R, Bhat A, Wordeman L, Scott JD. Gravin-associated kinase signaling networks coordinate γ-tubulin organization at mitotic spindle poles. J Biol Chem 2020; 295:13784-13797. [PMID: 32732289 PMCID: PMC7535905 DOI: 10.1074/jbc.ra120.014791] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/21/2020] [Indexed: 01/16/2023] Open
Abstract
Mitogenic signals that regulate cell division often proceed through multienzyme assemblies within defined intracellular compartments. The anchoring protein Gravin restricts the action of mitotic kinases and cell-cycle effectors to defined mitotic structures. In this report we discover that genetic deletion of Gravin disrupts proper accumulation and asymmetric distribution of γ-tubulin during mitosis. We utilize a new precision pharmacology tool, Local Kinase Inhibition, to inhibit the Gravin binding partner polo-like kinase 1 at spindle poles. Using a combination of gene-editing approaches, quantitative imaging, and biochemical assays, we provide evidence that disruption of local polo-like kinase 1 signaling underlies the γ-tubulin distribution defects observed with Gravin loss. Our study uncovers a new role for Gravin in coordinating γ-tubulin recruitment during mitosis and illuminates the mechanism by which signaling enzymes regulate this process at a distinct subcellular location.
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Affiliation(s)
- Paula J Bucko
- Department of Pharmacology, University of Washington, Seattle, Washington, USA
| | - Irvin Garcia
- Department of Pharmacology, University of Washington, Seattle, Washington, USA
| | - Ridhima Manocha
- Department of Pharmacology, University of Washington, Seattle, Washington, USA
| | - Akansha Bhat
- Department of Pharmacology, University of Washington, Seattle, Washington, USA
| | - Linda Wordeman
- Department of Physiology and Biophysics, University of Washington, Seattle, Washington, USA
| | - John D Scott
- Department of Pharmacology, University of Washington, Seattle, Washington, USA.
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Schoenherr C, Byron A, Griffith B, Loftus A, Wills JC, Munro AF, von Kriegsheim A, Frame MC. The autophagy protein Ambra1 regulates gene expression by supporting novel transcriptional complexes. J Biol Chem 2020; 295:12045-12057. [PMID: 32616651 PMCID: PMC7443501 DOI: 10.1074/jbc.ra120.012565] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 06/24/2020] [Indexed: 12/13/2022] Open
Abstract
Ambra1 is considered an autophagy and trafficking protein with roles in neurogenesis and cancer cell invasion. Here, we report that Ambra1 also localizes to the nucleus of cancer cells, where it has a novel nuclear scaffolding function that controls gene expression. Using biochemical fractionation and proteomics, we found that Ambra1 binds to multiple classes of proteins in the nucleus, including nuclear pore proteins, adaptor proteins such as FAK and Akap8, chromatin-modifying proteins, and transcriptional regulators like Brg1 and Atf2. We identified biologically important genes, such as Angpt1, Tgfb2, Tgfb3, Itga8, and Itgb7, whose transcription is regulated by Ambra1-scaffolded complexes, likely by altering histone modifications and Atf2 activity. Therefore, in addition to its recognized roles in autophagy and trafficking, Ambra1 scaffolds protein complexes at chromatin, regulating transcriptional signaling in the nucleus. This novel function for Ambra1, and the specific genes impacted, may help to explain the wider role of Ambra1 in cancer cell biology.
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Affiliation(s)
- Christina Schoenherr
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Adam Byron
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Billie Griffith
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Alexander Loftus
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Jimi C Wills
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Alison F Munro
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Alex von Kriegsheim
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Margaret C Frame
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom.
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Pyfrom SC, Quinn CC, Dorando HK, Luo H, Payton JE. BCALM (AC099524.1) Is a Human B Lymphocyte-Specific Long Noncoding RNA That Modulates B Cell Receptor-Mediated Calcium Signaling. J Immunol 2020; 205:595-607. [PMID: 32571842 PMCID: PMC7372127 DOI: 10.4049/jimmunol.2000088] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 05/27/2020] [Indexed: 12/12/2022]
Abstract
Of the thousands of long noncoding RNAs (lncRNA) identified in lymphocytes, very few have defined functions. In this study, we report the discovery and functional elucidation of a human B cell-specific lncRNA with high levels of expression in three types of B cell cancer and normal B cells. The AC099524.1 gene is upstream of the gene encoding the B cell-specific phospholipase C γ 2 (PLCG2), a B cell-specific enzyme that stimulates intracellular Ca2+ signaling in response to BCR activation. AC099524.1 (B cell-associated lncRNA modulator of BCR-mediated Ca+ signaling [BCALM]) transcripts are localized in the cytoplasm and, as expected, CRISPR/Cas9 knockout of AC099524.1 did not affect PLCG2 mRNA or protein expression. lncRNA interactome, RNA immunoprecipitation, and coimmunoprecipitation studies identified BCALM-interacting proteins in B cells, including phospholipase D 1 (PLD1), and kinase adaptor proteins AKAP9 (AKAP450) and AKAP13 (AKAP-Lbc). These two AKAP proteins form signaling complexes containing protein kinases A and C, which phosphorylate and activate PLD1 to produce phosphatidic acid (PA). BCR stimulation of BCALM-deficient B cells resulted in decreased PLD1 phosphorylation and increased intracellular Ca+ flux relative to wild-type cells. These results suggest that BCALM promotes negative feedback that downmodulates BCR-mediated Ca+ signaling by promoting phosphorylation of PLD1 by AKAP-associated kinases, enhancing production of PA. PA activates SHP-1, which negatively regulates BCR signaling. We propose the name BCALM for B-Cell Associated LncRNA Modulator of BCR-mediated Ca+ signaling. Our findings suggest a new, to our knowledge, paradigm for lncRNA-mediated modulation of lymphocyte activation and signaling, with implications for B cell immune response and BCR-dependent cancers.
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Affiliation(s)
- Sarah C Pyfrom
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Chaz C Quinn
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Hannah K Dorando
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Hong Luo
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - Jacqueline E Payton
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
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Gabrovsek L, Collins KB, Aggarwal S, Saunders LM, Lau HT, Suh D, Sancak Y, Trapnell C, Ong SE, Smith FD, Scott JD. A-kinase-anchoring protein 1 (dAKAP1)-based signaling complexes coordinate local protein synthesis at the mitochondrial surface. J Biol Chem 2020; 295:10749-10765. [PMID: 32482893 PMCID: PMC7397098 DOI: 10.1074/jbc.ra120.013454] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 05/20/2020] [Indexed: 12/30/2022] Open
Abstract
Compartmentalization of macromolecules is a ubiquitous molecular mechanism that drives numerous cellular functions. The appropriate organization of enzymes in space and time enables the precise transmission and integration of intracellular signals. Molecular scaffolds constrain signaling enzymes to influence the regional modulation of these physiological processes. Mitochondrial targeting of protein kinases and protein phosphatases provides a means to locally control the phosphorylation status and action of proteins on the surface of this organelle. Dual-specificity protein kinase A anchoring protein 1 (dAKAP1) is a multivalent binding protein that targets protein kinase A (PKA), RNAs, and other signaling enzymes to the outer mitochondrial membrane. Many AKAPs recruit a diverse set of binding partners that coordinate a broad range of cellular processes. Here, results of MS and biochemical analyses reveal that dAKAP1 anchors additional components, including the ribonucleoprotein granule components La-related protein 4 (LARP4) and polyadenylate-binding protein 1 (PABPC1). Local translation of mRNAs at organelles is a means to spatially control the synthesis of proteins. RNA-Seq data demonstrate that dAKAP1 binds mRNAs encoding proteins required for mitochondrial metabolism, including succinate dehydrogenase. Functional studies suggest that the loss of dAKAP1-RNA interactions reduces mitochondrial electron transport chain activity. Hence, dAKAP1 plays a previously unappreciated role as a molecular interface between second messenger signaling and local protein synthesis machinery.
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Affiliation(s)
- Laura Gabrovsek
- Department of Pharmacology, University of Washington, Seattle, Washington, USA
- Program in Molecular and Cellular Biology, University of Washington, Seattle, Washington, USA
| | - Kerrie B Collins
- Department of Pharmacology, University of Washington, Seattle, Washington, USA
| | - Stacey Aggarwal
- Department of Pharmacology, University of Washington, Seattle, Washington, USA
| | - Lauren M Saunders
- Program in Molecular and Cellular Biology, University of Washington, Seattle, Washington, USA
- Department of Genome Sciences, University of Washington, Seattle, Washington, USA
| | - Ho-Tak Lau
- Department of Pharmacology, University of Washington, Seattle, Washington, USA
| | - Danny Suh
- Department of Pharmacology, University of Washington, Seattle, Washington, USA
| | - Yasemin Sancak
- Department of Pharmacology, University of Washington, Seattle, Washington, USA
| | - Cole Trapnell
- Department of Genome Sciences, University of Washington, Seattle, Washington, USA
| | - Shao-En Ong
- Department of Pharmacology, University of Washington, Seattle, Washington, USA
| | - F Donelson Smith
- Department of Pharmacology, University of Washington, Seattle, Washington, USA
| | - John D Scott
- Department of Pharmacology, University of Washington, Seattle, Washington, USA
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Qi B, He L, Zhao Y, Zhang L, He Y, Li J, Li C, Zhang B, Huang Q, Xing J, Li F, Li Y, Ji L. Akap1 deficiency exacerbates diabetic cardiomyopathy in mice by NDUFS1-mediated mitochondrial dysfunction and apoptosis. Diabetologia 2020; 63:1072-1087. [PMID: 32072193 DOI: 10.1007/s00125-020-05103-w] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 01/06/2020] [Indexed: 12/22/2022]
Abstract
AIMS/HYPOTHESIS Diabetic cardiomyopathy, characterised by increased oxidative damage and mitochondrial dysfunction, contributes to the increased risk of heart failure in individuals with diabetes. Considering that A-kinase anchoring protein 121 (AKAP1) is localised in the mitochondrial outer membrane and plays key roles in the regulation of mitochondrial function, this study aimed to investigate the role of AKAP1 in diabetic cardiomyopathy and explore its underlying mechanisms. METHODS Loss- and gain-of-function approaches were used to investigate the role of AKAP1 in diabetic cardiomyopathy. Streptozotocin (STZ) was injected into Akap1-knockout (Akap1-KO) mice and their wild-type (WT) littermates to induce diabetes. In addition, primary neonatal cardiomyocytes treated with high glucose were used as a cell model of diabetes. Cardiac function was assessed with echocardiography. Akap1 overexpression was conducted by injecting adeno-associated virus 9 carrying Akap1 (AAV9-Akap1). LC-MS/MS analysis and functional experiments were used to explore underlying molecular mechanisms. RESULTS AKAP1 was downregulated in the hearts of STZ-induced diabetic mouse models. Akap1-KO significantly aggravated cardiac dysfunction in the STZ-treated diabetic mice when compared with WT diabetic littermates, as evidenced by the left ventricular ejection fraction (LVEF; STZ-treated WT mice [WT/STZ] vs STZ-treated Akap1-KO mice [KO/STZ], 51.6% vs 41.6%). Mechanistically, Akap1 deficiency impaired mitochondrial respiratory function characterised by reduced ATP production. Additionally, Akap1 deficiency increased cardiomyocyte apoptosis via enhanced mitochondrial reactive oxygen species (ROS) production. Furthermore, immunoprecipitation and mass spectrometry analysis indicated that AKAP1 interacted with the NADH-ubiquinone oxidoreductase 75 kDa subunit (NDUFS1). Specifically, Akap1 deficiency inhibited complex I activity by preventing translocation of NDUFS1 from the cytosol to mitochondria. Akap1 deficiency was also related to decreased ATP production and enhanced mitochondrial ROS-related apoptosis. In contrast, restoration of AKAP1 expression in the hearts of STZ-treated diabetic mice promoted translocation of NDUFS1 to mitochondria and alleviated diabetic cardiomyopathy in the LVEF (WT/STZ injected with adeno-associated virus carrying gfp [AAV9-gfp] vs WT/STZ AAV9-Akap1, 52.4% vs 59.6%; KO/STZ AAV9-gfp vs KO/STZ AAV9-Akap1, 42.2% vs 57.6%). CONCLUSIONS/INTERPRETATION Our study provides the first evidence that Akap1 deficiency exacerbates diabetic cardiomyopathy by impeding mitochondrial translocation of NDUFS1 to induce mitochondrial dysfunction and cardiomyocyte apoptosis. Our findings suggest that Akap1 upregulation has therapeutic potential for myocardial injury in individuals with diabetes.
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Affiliation(s)
- Bingchao Qi
- Department of Cardiology, Tangdu Hospital, Fourth Military Medical University, 1 Xinsi Road, Xi'an, 710038, China
| | - Linjie He
- State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi'an, China
- Department of Physiology and Pathophysiology, Fourth Military Medical University, Xi'an, China
| | - Ya Zhao
- State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi'an, China
- Department of Physiology and Pathophysiology, Fourth Military Medical University, Xi'an, China
- Laboratory Animal Center, Fourth Military Medical University, Xi'an, China
| | - Ling Zhang
- Department of Cardiology, Xijing Hospital, Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, China
| | - Yuanfang He
- State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi'an, China
- Department of Physiology and Pathophysiology, Fourth Military Medical University, Xi'an, China
| | - Jun Li
- State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi'an, China
- Department of Physiology and Pathophysiology, Fourth Military Medical University, Xi'an, China
| | - Congye Li
- Department of Cardiology, Xijing Hospital, Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, China
| | - Bo Zhang
- State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi'an, China
- Department of Physiology and Pathophysiology, Fourth Military Medical University, Xi'an, China
| | - Qichao Huang
- State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi'an, China
- Department of Physiology and Pathophysiology, Fourth Military Medical University, Xi'an, China
| | - Jinliang Xing
- State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi'an, China
- Department of Physiology and Pathophysiology, Fourth Military Medical University, Xi'an, China
| | - Fei Li
- Department of Cardiology, Xijing Hospital, Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, China.
| | - Yan Li
- Department of Cardiology, Tangdu Hospital, Fourth Military Medical University, 1 Xinsi Road, Xi'an, 710038, China.
| | - Lele Ji
- Experimental Teaching Center of Basic Medicine, Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, China.
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Ottolini M, Hong K, Cope EL, Daneva Z, DeLalio LJ, Sokolowski JD, Marziano C, Nguyen NY, Altschmied J, Haendeler J, Johnstone SR, Kalani MY, Park MS, Patel RP, Liedtke W, Isakson BE, Sonkusare SK. Local Peroxynitrite Impairs Endothelial Transient Receptor Potential Vanilloid 4 Channels and Elevates Blood Pressure in Obesity. Circulation 2020; 141:1318-1333. [PMID: 32008372 PMCID: PMC7195859 DOI: 10.1161/circulationaha.119.043385] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Impaired endothelium-dependent vasodilation is a hallmark of obesity-induced hypertension. The recognition that Ca2+ signaling in endothelial cells promotes vasodilation has led to the hypothesis that endothelial Ca2+ signaling is compromised during obesity, but the underlying abnormality is unknown. In this regard, transient receptor potential vanilloid 4 (TRPV4) ion channels are a major Ca2+ influx pathway in endothelial cells, and regulatory protein AKAP150 (A-kinase anchoring protein 150) enhances the activity of TRPV4 channels. METHODS We used endothelium-specific knockout mice and high-fat diet-fed mice to assess the role of endothelial AKAP150-TRPV4 signaling in blood pressure regulation under normal and obese conditions. We further determined the role of peroxynitrite, an oxidant molecule generated from the reaction between nitric oxide and superoxide radicals, in impairing endothelial AKAP150-TRPV4 signaling in obesity and assessed the effectiveness of peroxynitrite inhibition in rescuing endothelial AKAP150-TRPV4 signaling in obesity. The clinical relevance of our findings was evaluated in arteries from nonobese and obese individuals. RESULTS We show that Ca2+ influx through TRPV4 channels at myoendothelial projections to smooth muscle cells decreases resting blood pressure in nonobese mice, a response that is diminished in obese mice. Counterintuitively, release of the vasodilator molecule nitric oxide attenuated endothelial TRPV4 channel activity and vasodilation in obese animals. Increased activities of inducible nitric oxide synthase and NADPH oxidase 1 enzymes at myoendothelial projections in obese mice generated higher levels of nitric oxide and superoxide radicals, resulting in increased local peroxynitrite formation and subsequent oxidation of the regulatory protein AKAP150 at cysteine 36, to impair AKAP150-TRPV4 channel signaling at myoendothelial projections. Strategies that lowered peroxynitrite levels prevented cysteine 36 oxidation of AKAP150 and rescued endothelial AKAP150-TRPV4 signaling, vasodilation, and blood pressure in obesity. Peroxynitrite-dependent impairment of endothelial TRPV4 channel activity and vasodilation was also observed in the arteries from obese patients. CONCLUSIONS These data suggest that a spatially restricted impairment of endothelial TRPV4 channels contributes to obesity-induced hypertension and imply that inhibiting peroxynitrite might represent a strategy for normalizing endothelial TRPV4 channel activity, vasodilation, and blood pressure in obesity.
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Affiliation(s)
- Matteo Ottolini
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
- Department of Pharmacology, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
| | - Kwangseok Hong
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
| | - Eric L. Cope
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
| | - Zdravka Daneva
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
| | - Leon J. DeLalio
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
| | - Jennifer D. Sokolowski
- Department of Neurological Surgery, University of Virginia, Charlottesville, VA, 22908, USA
| | - Corina Marziano
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
| | - Nhiem Y. Nguyen
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
| | - Joachim Altschmied
- IUF-Leibniz Research Institute for Environmental Medicine, Duesseldorf, 40021, Germany
| | - Judith Haendeler
- IUF-Leibniz Research Institute for Environmental Medicine, Duesseldorf, 40021, Germany
- Institute of Clinical Chemistry and Laboratory Diagnostic, Medical Faculty, University of Duesseldorf, Duesseldorf, 40021, Germany
| | - Scott R. Johnstone
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
| | - Mohammad Y. Kalani
- Department of Neurological Surgery, University of Virginia, Charlottesville, VA, 22908, USA
| | - Min S. Park
- Department of Neurological Surgery, University of Virginia, Charlottesville, VA, 22908, USA
| | - Rakesh P. Patel
- Department of Pathology and Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Wolfgang Liedtke
- Department of Neurology, Duke University School of Medicine, Durham, NC, 27710, USA
| | - Brant E. Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
| | - Swapnil K. Sonkusare
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
- Department of Pharmacology, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
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Jagadish N, Devi S, Gupta N, Suri V, Suri A. Knockdown of A-kinase anchor protein 4 inhibits proliferation of triple-negative breast cancer cells in vitro and in vivo. Tumour Biol 2020; 42:1010428320914477. [PMID: 32342732 DOI: 10.1177/1010428320914477] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Triple-negative breast cancers are the most aggressive subtypes with poor prognosis due to lack of targeted cancer therapy. Recently, we reported an association of A-kinase anchor protein 4 expression with various clinico-pathological parameters of breast cancer patients. In this context, we examined the effect of knockdown of A-kinase anchor protein 4 on cell cycle, apoptosis, cellular proliferation, colony formation, migration, and invasion in triple-negative breast cancer cells. We also examined the synergistic cytotoxic effect of paclitaxel on A-kinase anchor protein 4 downregulated triple-negative breast cancer cells. Knockdown of A-kinase anchor protein 4 resulted in significant reduction in cellular growth and migratory abilities. Interestingly, we also observed enhanced cell death in A-kinase anchor protein 4 downregulated cells treated with paclitaxel. Knockdown of A-kinase anchor protein 4 in cell cycle resulted in G0/G1 phase arrest. Knockdown of A-kinase anchor protein 4 also led to increased reactive oxygen species generation as a result of upregulation of NOXA and CHOP. In addition, levels of cyclins, cyclin-dependent kinases, anti-apoptotic molecules, and mesenchymal markers were reduced in A-kinase anchor protein 4 downregulated cells. Moreover, downregulation of A-kinase anchor protein 4 also caused tumor growth reduction in in vivo studies. These data together suggest that A-kinase anchor protein 4 downregulation inhibits various malignant properties and enhances the cytotoxic effect of paclitaxel, and this combinatorial approach could be useful for triple-negative breast cancer treatment.
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Affiliation(s)
- Nirmala Jagadish
- Cancer Research Program, Cancer Microarray, Genes and Proteins Laboratory, National Institute of Immunology, New Delhi, India
| | - Sonika Devi
- Cancer Research Program, Cancer Microarray, Genes and Proteins Laboratory, National Institute of Immunology, New Delhi, India
| | - Namita Gupta
- Cancer Research Program, Cancer Microarray, Genes and Proteins Laboratory, National Institute of Immunology, New Delhi, India
| | - Vitusha Suri
- Mahatma Gandhi Medical College & Hospital, Jaipur, India
- SMS Medical College and Hospital, Jaipur, India
| | - Anil Suri
- Cancer Research Program, Cancer Microarray, Genes and Proteins Laboratory, National Institute of Immunology, New Delhi, India
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Bucko PJ, Lombard CK, Rathbun L, Garcia I, Bhat A, Wordeman L, Smith FD, Maly DJ, Hehnly H, Scott JD. Subcellular drug targeting illuminates local kinase action. eLife 2019; 8:e52220. [PMID: 31872801 PMCID: PMC6930117 DOI: 10.7554/elife.52220] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 11/30/2019] [Indexed: 01/02/2023] Open
Abstract
Deciphering how signaling enzymes operate within discrete microenvironments is fundamental to understanding biological processes. A-kinase anchoring proteins (AKAPs) restrict the range of action of protein kinases within intracellular compartments. We exploited the AKAP targeting concept to create genetically encoded platforms that restrain kinase inhibitor drugs at distinct subcellular locations. Local Kinase Inhibition (LoKI) allows us to ascribe organelle-specific functions to broad specificity kinases. Using chemical genetics, super resolution microscopy, and live-cell imaging we discover that centrosomal delivery of Polo-like kinase 1 (Plk1) and Aurora A (AurA) inhibitors attenuates kinase activity, produces spindle defects, and prolongs mitosis. Targeted inhibition of Plk1 in zebrafish embryos illustrates how centrosomal Plk1 underlies mitotic spindle assembly. Inhibition of kinetochore-associated pools of AurA blocks phosphorylation of microtubule-kinetochore components. This versatile precision pharmacology tool enhances investigation of local kinase biology.
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Affiliation(s)
- Paula J Bucko
- Department of PharmacologyUniversity of WashingtonSeattleUnited States
| | - Chloe K Lombard
- Department of ChemistryUniversity of WashingtonSeattleUnited States
| | - Lindsay Rathbun
- Department of BiologySyracuse UniversitySyracuseUnited States
| | - Irvin Garcia
- Department of PharmacologyUniversity of WashingtonSeattleUnited States
| | - Akansha Bhat
- Department of PharmacologyUniversity of WashingtonSeattleUnited States
| | - Linda Wordeman
- Department of Physiology and BiophysicsUniversity of WashingtonSeattleUnited States
| | - F Donelson Smith
- Department of PharmacologyUniversity of WashingtonSeattleUnited States
| | - Dustin J Maly
- Department of ChemistryUniversity of WashingtonSeattleUnited States
| | - Heidi Hehnly
- Department of BiologySyracuse UniversitySyracuseUnited States
| | - John D Scott
- Department of PharmacologyUniversity of WashingtonSeattleUnited States
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Haushalter KJ, Schilling JM, Song Y, Sastri M, Perkins GA, Strack S, Taylor SS, Patel HH. Cardiac ischemia-reperfusion injury induces ROS-dependent loss of PKA regulatory subunit RIα. Am J Physiol Heart Circ Physiol 2019; 317:H1231-H1242. [PMID: 31674811 PMCID: PMC6962616 DOI: 10.1152/ajpheart.00237.2019] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 10/21/2019] [Accepted: 10/21/2019] [Indexed: 12/27/2022]
Abstract
Type I PKA regulatory α-subunit (RIα; encoded by the Prkar1a gene) serves as the predominant inhibitor protein of the catalytic subunit of cAMP-dependent protein kinase (PKAc). However, recent evidence suggests that PKA signaling can be initiated by cAMP-independent events, especially within the context of cellular oxidative stress such as ischemia-reperfusion (I/R) injury. We determined whether RIα is actively involved in the regulation of PKA activity via reactive oxygen species (ROS)-dependent mechanisms during I/R stress in the heart. Induction of ex vivo global I/R injury in mouse hearts selectively downregulated RIα protein expression, whereas RII subunit expression appears to remain unaltered. Cardiac myocyte cell culture models were used to determine that oxidant stimulus (i.e., H2O2) alone is sufficient to induce RIα protein downregulation. Transient increase of RIα expression (via adenoviral overexpression) negatively affects cell survival and function upon oxidative stress as measured by increased induction of apoptosis and decreased mitochondrial respiration. Furthermore, analysis of mitochondrial subcellular fractions in heart tissue showed that PKA-associated proteins are enriched in subsarcolemmal mitochondria (SSM) fractions and that loss of RIα is most pronounced at SSM upon I/R injury. These data were supported via electron microscopy in A-kinase anchoring protein 1 (AKAP1)-knockout mice, where loss of AKAP1 expression leads to aberrant mitochondrial morphology manifested in SSM but not interfibrillar mitochondria. Thus, we conclude that modification of RIα via ROS-dependent mechanisms induced by I/R injury has the potential to sensitize PKA signaling in the cell without the direct use of the canonical cAMP-dependent activation pathway.NEW & NOTEWORTHY We uncovered a previously undescribed phenomenon involving oxidation-induced activation of PKA signaling in the progression of cardiac ischemia-reperfusion injury. Type I PKA regulatory subunit RIα, but not type II PKA regulatory subunits, is dynamically regulated by oxidative stress to trigger the activation of the catalytic subunit of PKA in cardiac myocytes. This effect may play a critical role in the regulation of subsarcolemmal mitochondria function upon the induction of ischemic injury in the heart.
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Affiliation(s)
- Kristofer J Haushalter
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California
- Veterans Affairs San Diego Healthcare System, San Diego, California
| | - Jan M Schilling
- Veterans Affairs San Diego Healthcare System, San Diego, California
- Department of Anesthesiology, University of California, San Diego, La Jolla, California
| | - Young Song
- Veterans Affairs San Diego Healthcare System, San Diego, California
- Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - Mira Sastri
- Department of Pharmacology, University of California, San Diego, La Jolla, California
| | - Guy A Perkins
- National Center for Microscopy and Imaging Research, University of California, San Diego, La Jolla, California
| | - Stefan Strack
- Department of Pharmacology, University of Iowa Carver College of Medicine, Iowa City, Iowa
| | - Susan S Taylor
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California
- Department of Pharmacology, University of California, San Diego, La Jolla, California
| | - Hemal H Patel
- Veterans Affairs San Diego Healthcare System, San Diego, California
- Department of Anesthesiology, University of California, San Diego, La Jolla, California
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Yu Y, Fang H, Qiu Z, Xia Z, Zhou B. DHA Attenuates Hypoxia/Reoxygenation Injury by Activating SSeCKS in Human Cerebrovascular Pericytes. Neurochem Res 2019; 45:310-321. [PMID: 31776970 PMCID: PMC6985071 DOI: 10.1007/s11064-019-02915-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 11/07/2019] [Accepted: 11/18/2019] [Indexed: 12/11/2022]
Abstract
Docosahexaenoic acid (DHA) can alleviate cerebral ischemia/reperfusion injury by reducing blood–brain barrier permeability and maintaining its integrity, accompanied by an increased Ang-1/Ang-2 ratio; however, the underlying mechanisms of these effects remain unclear. Src-suppressed C kinase substrates (SSeCKS), a substrate of protein kinase C, plays an important role in maintaining cell junctions and cell morphology and regulating cell permeability. However, whether DHA can increase SSeCKS expression and then mediate the Ang-1/Ang-2 ratio still needs to be studied. Human cerebrovascular pericytes (HBVPs) cultured in vitro were divided into groups, treated with or without DHA along with SSeCKS siRNA to knockdown SSeCKS expression, and then subjected to 24 h of hypoxia followed by 6 h of reoxygenation. Cell viability; lactate dehydrogenase (LDH) release; and Ang-1, Ang-2 and VEGF activity were detected by using ELISA kits. The apoptosis rate was assessed by TUNEL flow cytometry. Expression of the SSeCKS, Ang-1, Ang-2 and VEGF proteins was evaluated by western blotting. Pretreatment with 10 μM or 40 μM DHA efficiently attenuated hypoxia/reoxygenation (H/R) injury by activating SSeCKS to increase the Ang-1/Ang-2 ratio and downregulate VEGF expression in HBVPs, as evidenced by decreased LDH release and apoptotic rates and increased HBVPs viability. Meanwhile, after we used SSeCKS siRNA to knock down SSeCKS protein expression, the protective effect of DHA on HBVPs following H/R injury was reversed. In conclusion, DHA can activate SSeCKS to increase the Ang-1/Ang-2 ratio and downregulate VEGF expression in HBVPs, thus reducing H/R injury.
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Affiliation(s)
- Yanli Yu
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei, China
| | - Haibin Fang
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei, China
| | - Zhen Qiu
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei, China
| | - Zhongyuan Xia
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei, China
| | - Bin Zhou
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei, China.
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Wieben ED, Baratz KH, Aleff RA, Kalari KR, Tang X, Maguire LJ, Patel SV, Fautsch MP. Gene Expression and Missplicing in the Corneal Endothelium of Patients With a TCF4 Trinucleotide Repeat Expansion Without Fuchs' Endothelial Corneal Dystrophy. Invest Ophthalmol Vis Sci 2019; 60:3636-3643. [PMID: 31469403 PMCID: PMC6716950 DOI: 10.1167/iovs.19-27689] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 07/31/2019] [Indexed: 01/18/2023] Open
Abstract
Purpose CTG trinucleotide repeat (TNR) expansion in an intron of the TCF4 gene is the most common genetic variant associated with Fuchs' endothelial corneal dystrophy (FECD). Although several mechanisms have been implicated in the disease process, their exact pathophysiologic importance is unclear. To understand events leading from TCF4 TNR expansion to disease phenotype, we characterized splicing, gene expression, and exon sequence changes in a rare cohort of patients with TNR expansions but no phenotypic FECD (RE+/FECD-). Methods Corneal endothelium and blood were collected from patients undergoing endothelial keratoplasty for non-FECD corneal edema. Total RNA was isolated from corneal endothelial tissue (n = 3) and used for RNASeq. Gene splicing and expression was assessed by Mixture of Isoforms (MISO) and MAP-RSeq software. Genomic DNA was isolated from blood mononuclear cells and used for whole genome exome sequencing. Base calling was performed using Illumina's Real-Time Analysis. Results Three genes (MBNL1, KIF13A, AKAP13) that were previously identified as misspliced in patients with a CTG TNR expansion and FECD disease (RE+/FECD+) were found normally spliced in RE+/FECD- samples. Gene expression differences in pathways associated with the innate immune response, cell signaling (e.g., TGFβ, WNT), and cell senescence markers were also identified between RE+/FECD- and RE+/FECD+ groups. No consistent genetic variants were identified in RE+/FECD- patient exomes. Conclusions Identification of novel splicing patterns and differential gene expression in RE+/FECD- samples provides new insights and more relevant gene targets that may be protective against FECD disease in vulnerable patients with TCF4 CTG TNR expansions.
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Affiliation(s)
- Eric D. Wieben
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, United States
| | - Keith H. Baratz
- Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota, United States
| | - Ross A. Aleff
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, United States
| | - Krishna R. Kalari
- Division of Biostatistics and Bioinformatics and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota, United States
| | - Xiaojia Tang
- Division of Biostatistics and Bioinformatics and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota, United States
| | - Leo J. Maguire
- Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota, United States
| | - Sanjay V. Patel
- Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota, United States
| | - Michael P. Fautsch
- Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota, United States
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Zhou HY, He JG, Hu ZL, Xue SG, Xu JF, Cui QQ, Gao SQ, Zhou B, Wu PF, Long LH, Wang F, Chen JG. A-Kinase Anchoring Protein 150 and Protein Kinase A Complex in the Basolateral Amygdala Contributes to Depressive-like Behaviors Induced by Chronic Restraint Stress. Biol Psychiatry 2019; 86:131-142. [PMID: 31076080 DOI: 10.1016/j.biopsych.2019.03.967] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 02/11/2019] [Accepted: 03/05/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND The basolateral amygdala (BLA) has been widely implicated in the pathophysiology of major depressive disorder. A-kinase anchoring protein 150 (AKAP150) directs kinases and phosphatases to synaptic glutamate receptors, controlling synaptic transmission and plasticity. However, the role of the AKAP150 in the BLA in major depressive disorder remains poorly understood. METHODS Depressive-like behaviors in C57BL/6J mice were developed by chronic restraint stress (CRS). Mice received either intra-BLA injection of lentivirus-expressing Akap5 short hairpin RNA or Ht-31, a peptide to disrupt the interaction of AKAP150 and protein kinase A (PKA), followed by depressive-like behavioral tests. Alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid glutamate receptor (AMPAR)-mediated miniature excitatory postsynaptic currents were recorded by whole-cell patch-clamp techniques. RESULTS Chronic stress exposure induced depressive-like behaviors, which were accompanied by an increase in total and synaptic AKAP150 expression in the BLA. Accordingly, CRS facilitated the association of AKAP150 with PKA, but not of calcineurin in the BLA. Intra-BLA infusion of lentivirus-expressing Akap5 short hairpin RNA or Ht-31 prevented depressive-like behaviors and normalized phosphorylation of serine 845 and surface expression of AMPAR subunit 1 (GluA1) in the BLA of CRS mice. Finally, blockage of AKAP150-PKA complex signaling rescued the changes in AMPAR-mediated miniature excitatory postsynaptic currents in depressive-like mice. CONCLUSIONS These results suggest that AKAP150-PKA directly modulates BLA neuronal synaptic strength, and that AKAP150-PKA-GluA1 streamline signaling complex is responsible for CRS-induced disruption of synaptic AMPAR-mediated transmission and depressive-like behaviors in mice.
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Affiliation(s)
- Hai-Yun Zhou
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jin-Gang He
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; Research Center for Depression, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; Laboratory of Neuropsychiatric Diseases, Institute of Brain Research, Huazhong University of Science and Technology, Wuhan, China; Hubei Key Laboratory of Drug Target Research and Pharmacodynamic Evaluation, Huazhong University of Science and Technology, Wuhan, China; Key Laboratory of Neurological Diseases, Huazhong University of Science and Technology, Ministry of Education of China, Wuhan, China
| | - Zhuang-Li Hu
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; Laboratory of Neuropsychiatric Diseases, Institute of Brain Research, Huazhong University of Science and Technology, Wuhan, China; Hubei Key Laboratory of Drug Target Research and Pharmacodynamic Evaluation, Huazhong University of Science and Technology, Wuhan, China; Key Laboratory of Neurological Diseases, Huazhong University of Science and Technology, Ministry of Education of China, Wuhan, China
| | - Shi-Ge Xue
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jun-Feng Xu
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qian-Qian Cui
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shuang-Qi Gao
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Bin Zhou
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Peng-Fei Wu
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; Laboratory of Neuropsychiatric Diseases, Institute of Brain Research, Huazhong University of Science and Technology, Wuhan, China; Hubei Key Laboratory of Drug Target Research and Pharmacodynamic Evaluation, Huazhong University of Science and Technology, Wuhan, China; Key Laboratory of Neurological Diseases, Huazhong University of Science and Technology, Ministry of Education of China, Wuhan, China
| | - Li-Hong Long
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; Laboratory of Neuropsychiatric Diseases, Institute of Brain Research, Huazhong University of Science and Technology, Wuhan, China; Hubei Key Laboratory of Drug Target Research and Pharmacodynamic Evaluation, Huazhong University of Science and Technology, Wuhan, China; Key Laboratory of Neurological Diseases, Huazhong University of Science and Technology, Ministry of Education of China, Wuhan, China
| | - Fang Wang
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; Research Center for Depression, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; Laboratory of Neuropsychiatric Diseases, Institute of Brain Research, Huazhong University of Science and Technology, Wuhan, China; Hubei Key Laboratory of Drug Target Research and Pharmacodynamic Evaluation, Huazhong University of Science and Technology, Wuhan, China; Key Laboratory of Neurological Diseases, Huazhong University of Science and Technology, Ministry of Education of China, Wuhan, China.
| | - Jian-Guo Chen
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; Research Center for Depression, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; Laboratory of Neuropsychiatric Diseases, Institute of Brain Research, Huazhong University of Science and Technology, Wuhan, China; Hubei Key Laboratory of Drug Target Research and Pharmacodynamic Evaluation, Huazhong University of Science and Technology, Wuhan, China; Key Laboratory of Neurological Diseases, Huazhong University of Science and Technology, Ministry of Education of China, Wuhan, China.
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50
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Zhang M, Lu M, Huang H, Liu X, Su H, Li H. Maturation of thalamocortical synapses in the somatosensory cortex depends on neocortical AKAP5 expression. Neurosci Lett 2019; 709:134374. [PMID: 31310785 DOI: 10.1016/j.neulet.2019.134374] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 07/01/2019] [Accepted: 07/09/2019] [Indexed: 11/18/2022]
Abstract
Sensory cortex topographic maps consist of organized arrays of thalamocortical afferents (TCAs) that project into distinct areas of the cortex. Formation of topographic maps in sensory cortices is a prerequisite for functional maturation of the neocortex. Studies have shown that the formation of topographic maps and the maturation of thalamocortical synapses in the somatosensory cortex depend on the cyclic adenosine 5'-monophosphate-(cAMP)-protein kinase A (PKA) signaling pathway. AKAP5 is a scaffold protein (also called AKAP79 in humans or AKAP150 in rodents; AKAP79/150) that serves as a signaling hub that links cAMP and PKA signaling. Whether AKAP5 plays a role in topographic map formation and the maturation of thalamocortical synapses during development of the somatosensory cortex is still unknown. Here, we generated cortex-specific AKAP5-knockout mice (CxAKAP5KO) to examine its roles in somatosensory cortex development. We found that CxAKAP5KO mice displayed impaired cortical barrel maps. Electrophysiological recordings showed that the AMPA/NMDA ratio was reduced, and silent synapses were increased in thalamocortical synapses of CxAKAP5KO mice during postnatal development. Morphological analysis of layer IV cortical neurons demonstrated that dendritic refinement of these neurons was abnormal. These results indicate that AKAP5 is necessary for both topographic map formation and maturation of thalamocortical synapses as well as morphological development of cortical neurons in the somatosensory cortex.
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Affiliation(s)
- Min Zhang
- Department of Physiology, Anhui Medical College, Anhui 230601, China
| | - Meifang Lu
- Department of Histology and Embryology, School of Basic Medical Sciences, Anhui Medical University, Anhui 230032, China
| | - Hao Huang
- Department of Histology and Embryology, School of Basic Medical Sciences, Anhui Medical University, Anhui 230032, China
| | - Xiaoyan Liu
- Department of Histology and Embryology, School of Basic Medical Sciences, Anhui Medical University, Anhui 230032, China
| | - Haoran Su
- Department of Electronic Engineering, City University of Hong Kong, Hong Kong, China
| | - Hong Li
- Department of Histology and Embryology, School of Basic Medical Sciences, Anhui Medical University, Anhui 230032, China.
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