1
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Rondón Ortiz AN, Zhang L, Ash PE, Basu A, Puri S, van der Spek SJ, Dorrian L, Emili A, Wolozin B. Proximity labeling reveals dynamic changes in the SQSTM1 protein network. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.12.12.571324. [PMID: 38168279 PMCID: PMC10760047 DOI: 10.1101/2023.12.12.571324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Sequestosome1 (SQSTM1) is an autophagy receptor that mediates degradation of intracellular cargo, including protein aggregates, through multiple protein interactions. These interactions form the SQSTM1 protein network that are mediated by SQSTM1 functional interaction domains, which include LIR, PB1, UBA and KIR. Despite various attempts to unravel the complexity of the SQSTM1 protein network, our understanding of the relationship of various components in cellular physiology and disease states continues to evolve. To investigate the SQSTM1 protein interaction network, we performed proximity profile labeling by fusing TurboID with the human protein SQSTM1 (TurboID::SQSTM1). This chimeric protein displayed well-established SQSTM1 features including: production of SQSTM1 intracellular bodies, binding to known SQSTM1 interacting partners via defined functional SQSTM1 interacting domains and capture of novel SQSTM1 interactors. Strikingly, aggregated tau protein altered the protein interaction network of SQSTM1 to include many stress-associated proteins. Overall, our work reveals the dynamic landscape of the SQSTM1 protein network and offers a resource to study SQSTM1 function in cellular physiology and disease state.
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Affiliation(s)
- Alejandro N. Rondón Ortiz
- Department of Biology, Boston University, Boston, MA 02215, USA
- Center for Network Systems Biology, Boston University, Boston, MA 02215, USA
- Departments of Anatomy & Neurobiology, Boston University, Boston, MA 02215, USA
| | - Lushuang Zhang
- Departments of Anatomy & Neurobiology, Boston University, Boston, MA 02215, USA
| | - Peter E.A. Ash
- Departments of Anatomy & Neurobiology, Boston University, Boston, MA 02215, USA
| | - Avik Basu
- Center for Network Systems Biology, Boston University, Boston, MA 02215, USA
- Department of Biochemistry, Boston University, Boston, MA 02115, USA
- Department of Chemical Physiology & Biochemistry, Oregon Health Sciences University, Portland, OR 97239, USA
| | - Sambhavi Puri
- Departments of Anatomy & Neurobiology, Boston University, Boston, MA 02215, USA
| | | | - Luke Dorrian
- Departments of Anatomy & Neurobiology, Boston University, Boston, MA 02215, USA
| | - Andrew Emili
- Center for Network Systems Biology, Boston University, Boston, MA 02215, USA
- Department of Biochemistry, Boston University, Boston, MA 02115, USA
- Department of Chemical Physiology & Biochemistry, Oregon Health Sciences University, Portland, OR 97239, USA
| | - Benjamin Wolozin
- Departments of Anatomy & Neurobiology, Boston University, Boston, MA 02215, USA
- Center for Systems Neuroscience, Boston University, Boston, MA 02115, USA
- Center for Neurophotonics, Boston University, Boston, MA 02115, USA
- Department of Neurology, Boston University, Boston, MA 02115, USA
- Department of Pharmacology, Physiology and Biophysics
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2
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Liu T, Wetzel L, Zhu Z, Kumaraguru P, Gorthi V, Yan Y, Bukhari MZ, Ermekbaeva A, Jeon H, Kee TR, Woo JAA, Kang DE. Disruption of Mitophagy Flux through the PARL-PINK1 Pathway by CHCHD10 Mutations or CHCHD10 Depletion. Cells 2023; 12:2781. [PMID: 38132101 PMCID: PMC10741529 DOI: 10.3390/cells12242781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 11/21/2023] [Accepted: 12/03/2023] [Indexed: 12/23/2023] Open
Abstract
Coiled-coil-helix-coiled-coil-helix domain-containing 10 (CHCHD10) is a nuclear-encoded mitochondrial protein which is primarily mutated in the spectrum of familial and sporadic amyotrophic lateral sclerosis (ALS)-frontotemporal dementia (FTD). Endogenous CHCHD10 levels decline in the brains of ALS-FTD patients, and the CHCHD10S59L mutation in Drosophila induces dominant toxicity together with PTEN-induced kinase 1 (PINK1), a protein critical for the induction of mitophagy. However, whether and how CHCHD10 variants regulate mitophagy flux in the mammalian brain is unknown. Here, we demonstrate through in vivo and in vitro models, as well as human FTD brain tissue, that ALS/FTD-linked CHCHD10 mutations (R15L and S59L) impair mitophagy flux and mitochondrial Parkin recruitment, whereas wild-type CHCHD10 (CHCHD10WT) normally enhances these measures. Specifically, we show that CHCHD10R15L and CHCHD10S59L mutations reduce PINK1 levels by increasing PARL activity, whereas CHCHD10WT produces the opposite results through its stronger interaction with PARL, suppressing its activity. Importantly, we also demonstrate that FTD brains with TAR DNA-binding protein-43 (TDP-43) pathology demonstrate disruption of the PARL-PINK1 pathway and that experimentally impairing mitophagy promotes TDP-43 aggregation. Thus, we provide herein new insights into the regulation of mitophagy and TDP-43 aggregation in the mammalian brain through the CHCHD10-PARL-PINK1 pathway.
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Affiliation(s)
- Tian Liu
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA (Z.Z.); (Y.Y.)
| | - Liam Wetzel
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA (Z.Z.); (Y.Y.)
| | - Zexi Zhu
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA (Z.Z.); (Y.Y.)
| | - Pavan Kumaraguru
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA (Z.Z.); (Y.Y.)
| | - Viraj Gorthi
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA (Z.Z.); (Y.Y.)
| | - Yan Yan
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA (Z.Z.); (Y.Y.)
- Byrd Alzheimer’s Center & Research Institute, Department of Molecular Medicine, USF Health Morsani College of Medicine, Tampa, FL 33613, USA
| | - Mohammed Zaheen Bukhari
- Byrd Alzheimer’s Center & Research Institute, Department of Molecular Medicine, USF Health Morsani College of Medicine, Tampa, FL 33613, USA
| | - Aizara Ermekbaeva
- Byrd Alzheimer’s Center & Research Institute, Department of Molecular Medicine, USF Health Morsani College of Medicine, Tampa, FL 33613, USA
| | - Hanna Jeon
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA (Z.Z.); (Y.Y.)
| | - Teresa R. Kee
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA (Z.Z.); (Y.Y.)
- Byrd Alzheimer’s Center & Research Institute, Department of Molecular Medicine, USF Health Morsani College of Medicine, Tampa, FL 33613, USA
| | - Jung-A Alexa Woo
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA (Z.Z.); (Y.Y.)
| | - David E. Kang
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA (Z.Z.); (Y.Y.)
- Louis Stokes Cleveland VA Medical Center, Cleveland, OH 44106, USA
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3
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Lin YW, Lin TT, Chen CH, Wang RH, Lin YH, Tseng TY, Zhuang YJ, Tang SY, Lin YC, Pang JY, Chakravarthy RD, Lin HC, Tzou SC, Chao JI. Enhancing Efficacy of Albumin-Bound Paclitaxel for Human Lung and Colorectal Cancers through Autophagy Receptor Sequestosome 1 (SQSTM1)/p62-Mediated Nanodrug Delivery and Cancer therapy. ACS NANO 2023; 17:19033-19051. [PMID: 37737568 DOI: 10.1021/acsnano.3c04739] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
Selective autophagy is a defense mechanism by which foreign pathogens and abnormal substances are processed to maintain cellular homeostasis. Sequestosome 1 (SQSTM1)/p62, a vital selective autophagy receptor, recruits ubiquitinated cargo to form autophagosomes for lysosomal degradation. Nab-PTX is an albumin-bound paclitaxel nanoparticle used in clinical cancer therapy. However, the role of SQSTM1 in regulating the delivery and efficacy of nanodrugs remains unclear. Here we showed that SQSTM1 plays a crucial role in Nab-PTX drug delivery and efficacy in human lung and colorectal cancers. Nab-PTX induces SQSTM1 phosphorylation at Ser403, which facilitates its incorporation into the selective autophagy of nanoparticles, known as nanoparticulophagy. Nab-PTX increased LC3-II protein expression, which triggered autophagosome formation. SQSTM1 enhanced Nab-PTX recognition to form autophagosomes, which were delivered to lysosomes for albumin degradation, thereby releasing PTX to induce mitotic catastrophe and apoptosis. Knockout of SQSTM1 downregulated Nab-PTX-induced mitotic catastrophe, apoptosis, and tumor inhibition in vitro and in vivo and inhibited Nab-PTX-induced caspase 3 activation via a p53-independent pathway. Ectopic expression of SQSTM1 by transfection of an SQSTM1-GFP vector restored the drug efficacy of Nab-PTX. Importantly, SQSTM1 is highly expressed in advanced lung and colorectal tumors and is associated with poor overall survival in clinical patients. Targeting SQSTM1 may provide an important strategy to improve nanodrug efficacy in clinical cancer therapy. This study demonstrates the enhanced efficacy of Nab-PTX for human lung and colorectal cancers via SQSTM1-mediated nanodrug delivery.
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Affiliation(s)
- Yu-Wei Lin
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 30068, Taiwan
| | - Tzu-Ting Lin
- Institute of Molecular Medicine and Bioengineering, National Yang Ming Chiao Tung University, Hsinchu 30068, Taiwan
| | - Chien-Hung Chen
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 30068, Taiwan
| | - Rou-Hsin Wang
- Institute of Molecular Medicine and Bioengineering, National Yang Ming Chiao Tung University, Hsinchu 30068, Taiwan
| | - Ya-Hui Lin
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 30068, Taiwan
| | - Tzu-Yen Tseng
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 30068, Taiwan
| | - Yan-Jun Zhuang
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 30068, Taiwan
| | - Sheng-Yueh Tang
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 30068, Taiwan
| | - Yen-Cheng Lin
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 30068, Taiwan
| | - Jiun-Yu Pang
- Institute of Molecular Medicine and Bioengineering, National Yang Ming Chiao Tung University, Hsinchu 30068, Taiwan
| | - Rajan Deepan Chakravarthy
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan
| | - Hsin-Chieh Lin
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan
| | - Shey-Cherng Tzou
- Institute of Molecular Medicine and Bioengineering, National Yang Ming Chiao Tung University, Hsinchu 30068, Taiwan
| | - Jui-I Chao
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 30068, Taiwan
- Institute of Molecular Medicine and Bioengineering, National Yang Ming Chiao Tung University, Hsinchu 30068, Taiwan
- Center For Intelligent Drug Systems and Smart Bio-devices, National Yang Ming Chiao Tung University, Hsinchu 30068, Taiwan
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4
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Khan S, Yang J, Cobo ER, Wang Y, Xu M, Wang T, Shi Y, Liu G, Han B. Streptococcus uberis induced expressions of pro-inflammatory IL-6, TNF-α, and IFN-γ in bovine mammary epithelial cells associated with inhibited autophagy and autophagy flux formation. Microb Pathog 2023; 183:106270. [PMID: 37499842 DOI: 10.1016/j.micpath.2023.106270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Revised: 07/16/2023] [Accepted: 07/24/2023] [Indexed: 07/29/2023]
Abstract
Autophagy is a highly conserved cellular defensive mechanism that can eliminate bacterial pathogens such as Streptococcus uberis, that causes mastitis in cows. However, S. uberis induced autophagy is still unclear. In this study, we tested if certain inflammatory cytokines such as IL-6, TNF-α, and IFN-γ, critical in mastitis due to S. uberis infection, regulate autophagy activation in bovine mammary epithelial cells (bMECs). Using Western blot and laser scanning confocal microscope in bMECs challenged by S. uberis, showed that the expression of IL-6, TNF-α, IFN-γ oscillated with the expressions of autophagic Atg5, ULK1, PTEN, P62, and LC3ӀӀ/LC3Ӏ. S. uberis infection induced autophagosomes and LC3 puncta in bMECs with upregulation of Atg5, ULK1, PTEN, LC3ӀӀ/LC3Ӏ, and downregulation of P62. The levels of IL-6, TNF-α, and IFN-γ increased during autophagy flux formation to decrease during autophagy induction. Autophagy inhibition increased the expression of IL-6, TNF-α, and IFN-γ and increased S. uberis burden. This study indicates autophagy is induced during S. uberis infection and IL-6, TNF-α, and IFN-γ contribute to autophagy and autophagy flux formation.
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Affiliation(s)
- Sohrab Khan
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, 100193, PR China
| | - Jingyue Yang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, 100193, PR China
| | - Eduardo R Cobo
- Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, T2N 4N1, Canada
| | - Yue Wang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, 100193, PR China
| | - Maolin Xu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, 100193, PR China
| | - Tian Wang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, 100193, PR China
| | - Yuxiang Shi
- College of Life Sciences and Food Engineering, Hebei University of Engineering, Handan, 056038, Hebei, China
| | - Gang Liu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, 100193, PR China.
| | - Bo Han
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, 100193, PR China.
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5
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Cazzaro S, Woo JAA, Wang X, Liu T, Rego S, Kee TR, Koh Y, Vázquez-Rosa E, Pieper AA, Kang DE. Slingshot homolog-1-mediated Nrf2 sequestration tips the balance from neuroprotection to neurodegeneration in Alzheimer's disease. Proc Natl Acad Sci U S A 2023; 120:e2217128120. [PMID: 37463212 PMCID: PMC10374160 DOI: 10.1073/pnas.2217128120] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 06/16/2023] [Indexed: 07/20/2023] Open
Abstract
Oxidative damage in the brain is one of the earliest drivers of pathology in Alzheimer's disease (AD) and related dementias, both preceding and exacerbating clinical symptoms. In response to oxidative stress, nuclear factor erythroid 2-related factor 2 (Nrf2) is normally activated to protect the brain from oxidative damage. However, Nrf2-mediated defense against oxidative stress declines in AD, rendering the brain increasingly vulnerable to oxidative damage. Although this phenomenon has long been recognized, its mechanistic basis has been a mystery. Here, we demonstrate through in vitro and in vivo models, as well as human AD brain tissue, that Slingshot homolog-1 (SSH1) drives this effect by acting as a counterweight to neuroprotective Nrf2 in response to oxidative stress and disease. Specifically, oxidative stress-activated SSH1 suppresses nuclear Nrf2 signaling by sequestering Nrf2 complexes on actin filaments and augmenting Kelch-like ECH-associated protein 1 (Keap1)-Nrf2 interaction, independently of SSH1 phosphatase activity. We also show that Ssh1 elimination in AD models increases Nrf2 activation, which mitigates tau and amyloid-β accumulation and protects against oxidative injury, neuroinflammation, and neurodegeneration. Furthermore, loss of Ssh1 preserves normal synaptic function and transcriptomic patterns in tauP301S mice. Importantly, we also show that human AD brains exhibit highly elevated interactions of Nrf2 with both SSH1 and Keap1. Thus, we demonstrate here a unique mode of Nrf2 blockade that occurs through SSH1, which drives oxidative damage and ensuing pathogenesis in AD. Strategies to inhibit SSH1-mediated Nrf2 suppression while preserving normal SSH1 catalytic function may provide new neuroprotective therapies for AD and related dementias.
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Affiliation(s)
- Sara Cazzaro
- Department of Pathology, Case Western Reserve University, School of Medicine, Cleveland, OH44106
- Department of Molecular Medicine, University of South Florida Health College of Medicine, Tampa, FL33620
| | - Jung-A A. Woo
- Department of Pathology, Case Western Reserve University, School of Medicine, Cleveland, OH44106
| | - Xinming Wang
- Department of Pathology, Case Western Reserve University, School of Medicine, Cleveland, OH44106
| | - Tian Liu
- Department of Pathology, Case Western Reserve University, School of Medicine, Cleveland, OH44106
| | - Shanon Rego
- Department of Molecular Medicine, University of South Florida Health College of Medicine, Tampa, FL33620
| | - Teresa R. Kee
- Department of Pathology, Case Western Reserve University, School of Medicine, Cleveland, OH44106
- Department of Molecular Medicine, University of South Florida Health College of Medicine, Tampa, FL33620
| | - Yeojung Koh
- Department of Pathology, Case Western Reserve University, School of Medicine, Cleveland, OH44106
- Department of Psychiatry, Case Western Reserve University, School of Medicine, Cleveland, OH44106
- Institute for Transformative Molecular Medicine, Case Western Reserve University, School of Medicine, Cleveland, OH44106
| | - Edwin Vázquez-Rosa
- Department of Psychiatry, Case Western Reserve University, School of Medicine, Cleveland, OH44106
- Institute for Transformative Molecular Medicine, Case Western Reserve University, School of Medicine, Cleveland, OH44106
| | - Andrew A. Pieper
- Department of Psychiatry, Case Western Reserve University, School of Medicine, Cleveland, OH44106
- Institute for Transformative Molecular Medicine, Case Western Reserve University, School of Medicine, Cleveland, OH44106
- Department of Neuroscience, Case Western Reserve University, School of Medicine, Cleveland, OH44106
- Geriatric Psychiatry, Geriatric Research Education and Clinical Center, Louis Stokes Cleveland Veteran Affairs Medical Center, Cleveland, OH44106
- Brain Health Medicines, Center Harrington Discovery Institute, Cleveland, OH44106
| | - David E. Kang
- Department of Pathology, Case Western Reserve University, School of Medicine, Cleveland, OH44106
- Louis Stokes Cleveland Veteran Affairs Medical Center, Cleveland, OH44106
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6
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Cazzaro S, Zhao X, Zhao VK, Kim YK, Woo JAA. Slingshot homolog-1 amplifies mitochondrial abnormalities by distinctly impairing health and clearance of mitochondria. Hum Mol Genet 2023; 32:1660-1672. [PMID: 36637427 PMCID: PMC10162431 DOI: 10.1093/hmg/ddad006] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 12/23/2022] [Accepted: 01/10/2023] [Indexed: 01/14/2023] Open
Abstract
Accumulating toxic protein assemblies, including Aβ and tau, and dysfunctional mitochondria are associated with synaptic and neuronal loss in Alzheimer's disease (AD). Such accumulations are thought to be owing to clearance defects in the autophagy-lysosome pathway. Mitochondrial dysfunction is evident in AD brains and animal models at multiple levels, such as mitochondrial genomic mutations, disrupted bioenergetics, deregulated mitochondrial dynamics and impaired clearance of damaged mitochondria (mitophagy). Slingshot homolog-1 (SSH1) is a phosphatase activated by oxidative stress, high intracellular levels of Ca2+ and Aβ42 oligomers (Aβ42O), known for its function to dephosphorylate/activate cofilin through the N-terminal region. SSH1-mediated cofilin dephosphorylation results in Ab42O-induced severing of F-actin and translocation of cofilin to mitochondria, which promotes mitochondria-mediated apoptosis, synaptic loss and synaptic deficits. On the other hand, SSH1-mediated dephosphorylation/deactivation of the autophagy-cargo receptor p62 (SQSTM1), through its C-terminal region, inhibits p62 autophagy flux. However, the interplay between these two different activities of SSH1 in Aβ42O-induced mitochondrial toxicity remains unclear. In this study, we assessed the role of endogenous SSH1 and different regions of SSH1 in regulating mitochondrial health, mitochondrial respiration, clearance of damaged mitochondria and synaptic integrity in vitro and in vivo. Our results indicate that SSH1 suppresses mitochondrial health and respiration through the cofilin-binding N-terminal region, whereas SSH1 impairs mitophagy through a newly identified ~ 100 residue p62-binding domain in the C-terminal region. These results indicate that both N-terminal and C-terminal regions negatively impact mitochondria by distinct and independent modalities to amplify mitochondrial abnormalities, making SSH1 an excellent target to mitigate AD pathogenesis.
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Affiliation(s)
- Sara Cazzaro
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA
- Department of Molecular Medicine, Byrd Alzheimer’s Center & Research Institute, USF Health Morsani College of Medicine, Tampa, FL 33613, USA
| | - Xingyu Zhao
- Department of Molecular Medicine, Byrd Alzheimer’s Center & Research Institute, USF Health Morsani College of Medicine, Tampa, FL 33613, USA
| | - Victoria K Zhao
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Yenna K Kim
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Jung-A A Woo
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA
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7
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Yan Y, Wang X, Chaput D, Shin MK, Koh Y, Gan L, Pieper AA, Woo JAA, Kang DE. X-linked ubiquitin-specific peptidase 11 increases tauopathy vulnerability in women. Cell 2022; 185:3913-3930.e19. [PMID: 36198316 PMCID: PMC9588697 DOI: 10.1016/j.cell.2022.09.002] [Citation(s) in RCA: 41] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 07/31/2022] [Accepted: 08/31/2022] [Indexed: 01/26/2023]
Abstract
Although women experience significantly higher tau burden and increased risk for Alzheimer's disease (AD) than men, the underlying mechanism for this vulnerability has not been explained. Here, we demonstrate through in vitro and in vivo models, as well as human AD brain tissue, that X-linked ubiquitin specific peptidase 11 (USP11) augments pathological tau aggregation via tau deubiquitination initiated at lysine-281. Removal of ubiquitin provides access for enzymatic tau acetylation at lysines 281 and 274. USP11 escapes complete X-inactivation, and female mice and people both exhibit higher USP11 levels than males. Genetic elimination of usp11 in a tauopathy mouse model preferentially protects females from acetylated tau accumulation, tau pathology, and cognitive impairment. USP11 levels also strongly associate positively with tau pathology in females but not males. Thus, inhibiting USP11-mediated tau deubiquitination may provide an effective therapeutic opportunity to protect women from increased vulnerability to AD and other tauopathies.
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Affiliation(s)
- Yan Yan
- Department of Pathology, Case Western Reserve University, School of Medicine, Cleveland, OH, USA; Department of Molecular Medicine, USF Health College of Medicine, Tampa, FL, USA
| | - Xinming Wang
- Department of Pathology, Case Western Reserve University, School of Medicine, Cleveland, OH, USA
| | - Dale Chaput
- Department of Molecular Medicine, USF Health College of Medicine, Tampa, FL, USA
| | - Min-Kyoo Shin
- Department of Psychiatry, Case Western Reserve University, School of Medicine, Cleveland, OH, USA; Harrington Discovery Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Yeojung Koh
- Department of Pathology, Case Western Reserve University, School of Medicine, Cleveland, OH, USA; Department of Psychiatry, Case Western Reserve University, School of Medicine, Cleveland, OH, USA; Harrington Discovery Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Li Gan
- Helen and Robert Appel Alzheimer's Disease Research Institute, Weill Cornell Medicine, New York, NY, USA
| | - Andrew A Pieper
- Department of Psychiatry, Case Western Reserve University, School of Medicine, Cleveland, OH, USA; Department of Neuroscience, Case Western Reserve University, School of Medicine, Cleveland, OH, USA; Institute for Transformative Molecular Medicine, Case Western Reserve University, School of Medicine, Cleveland, OH, USA; Geriatric Psychiatry, GRECC, Cleveland, Louis Stokes Cleveland VA Medical Center, OH, USA; Harrington Discovery Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Jung-A A Woo
- Department of Pathology, Case Western Reserve University, School of Medicine, Cleveland, OH, USA; Department of Molecular Medicine, USF Health College of Medicine, Tampa, FL, USA.
| | - David E Kang
- Department of Pathology, Case Western Reserve University, School of Medicine, Cleveland, OH, USA; Louis Strokes Cleveland VA Medical Center, Cleveland, OH, USA; Department of Molecular Medicine, USF Health College of Medicine, Tampa, FL, USA.
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8
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Zhao W, Xu M, Barkema HW, Xie X, Lin Y, Khan S, Kastelic JP, Wang D, Deng Z, Han B. Prototheca bovis induces autophagy in bovine mammary epithelial cells via the HIF-1α and AMPKα/ULK1 pathway. Front Immunol 2022; 13:934819. [PMID: 36148236 PMCID: PMC9486811 DOI: 10.3389/fimmu.2022.934819] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 08/10/2022] [Indexed: 11/29/2022] Open
Abstract
Prototheca bovis, a highly contagious pathogen, causes bovine mastitis, resulting in premature culling of affected cows and severe economic losses. Infection with P. bovis caused oxidative stress and apoptosis in bovine mammary epithelial cells (bMECs); however, mechanisms underlying P. bovis-induced autophagy remain unclear. Therefore, the autophagy flux induced by P. bovis in bMECs was analyzed by Western blot and laser scanning confocal microscopy. Expression levels of proteins in the HIF-1α and AMPKα/ULK1 pathway, including HIF-1α, AMPKα, p-AMPKα, ULK1, p-ULK1, mTOR, and p-mTOR, plus expression of autophagy-related genes including SQSTM1/p62, Atg5, Beclin1, and LC3II/LC3I, were quantified with Western blot. Infection with P. bovis induced autophagosomes and LC3 puncta in bMECs that were detected using transmission electron microscopy and laser scanning confocal microscopy, respectively. In addition, lysosome-associated proteins Rab7 and LAMP2a, and lysosomal activity were measured with Western blot and laser scanning confocal microscopy. Infection with P. bovis induced an unobstructed autophagic flux, increased protein expression of LC3II/LC3I, and decreased SQSTM1/p62 protein expression at 6 hpi. Furthermore, P. bovis upregulated protein expression in the HIF-1α and AMPKα/ULK1 pathway and increased the ratio of LC3II/LC3I, implying autophagy was activated in bMECs. However, deletion of AMPKα or ULK1 decreased LC3II/LC3I expression levels and LC3 puncta numbers, suggesting that autophagy was inhibited in bMECs. Additionally, deficiency of HIF-1α decreased protein expression of AMPKα and ULK1 as well as LC3 puncta numbers, and autophagy induced by P. bovis was also inhibited in bMECs. At 6 hpi, lysosome-associated protein Rab7 was decreased and LAMP2a was increased, indicating normal autophagy. In contrast, at 12 hpi, expression of Rab7 and LAMP2a proteins indicated that autophagy was inhibited in bMECs at that time. Therefore, we confirmed that P. bovis infection induced autophagy in bMECs via the HIF-1α and AMPKα/ULK1 pathway, with involvement of lysosome-associated protein Rab7 and LAMP2a.
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Affiliation(s)
- Wenpeng Zhao
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Maolin Xu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Herman W. Barkema
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Xiaochen Xie
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Yushan Lin
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Sohrab Khan
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - John P. Kastelic
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Dong Wang
- College of Life Science, Ningxia University, Yinchuan, China
| | - Zhaoju Deng
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, China
- *Correspondence: Zhaoju Deng, ; Bo Han,
| | - Bo Han
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, China
- *Correspondence: Zhaoju Deng, ; Bo Han,
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Cazzaro S, Fang C, Khan H, Witas R, Kee TR, Woo JAA, Kang DE. Slingshot homolog-1 mediates the secretion of small extracellular vesicles containing misfolded proteins by regulating autophagy cargo receptors and actin dynamics. Front Aging Neurosci 2022; 14:933979. [PMID: 36092812 PMCID: PMC9452914 DOI: 10.3389/fnagi.2022.933979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 08/08/2022] [Indexed: 11/16/2022] Open
Abstract
Increasing evidence indicates that the accumulation misfolded proteins in Alzheimer's disease (AD) arises from clearance defects in the autophagy-lysosome pathway. Misfolded proteins such as Aβ and tau are secreted in small extracellular vesicles (i.e., exosomes) and are propagated from cell to cell in part through secreted small extracellular vesicles (sEVs). Recent studies suggest that autophagic activity and exosome secretion are coregulated events, and multiple autophagy-related proteins are found in sEVs, including the cargo receptors Sqstm1/p62 and optineurin. However, whether and how autophagy cargo receptors per se regulate the secretion of sEVs is unknown. Moreover, despite the prominent role of actin dynamics in secretory vesicle release, its role in EV secretion is unknown. In this study, we leveraged the dual axes of Slingshot Homolog-1 (SSH1), which inhibits Sqstm1/p62-mediated autophagy and activates cofilin-mediated actin dynamics, to study the regulation of sEV secretion. Here we show that cargo receptors Sqstm1/p62 and optineurin inhibit sEV secretion, an activity that requires their ability to bind ubiquitinated cargo. Conversely, SSH1 increases sEV secretion by dephosphorylating Sqstm1/p62 at pSer403, the phospho-residue that allows Sqstm1/p62 to bind ubiquitinated cargo. In addition, increasing actin dynamics through the SSH1-cofilin activation pathway also increases sEV secretion, which is mimicked by latrunculin B treatment. Finally, Aβ42 oligomers and mutant tau increase sEV secretion and are physically associated with secreted sEVs. These findings suggest that increasing cargo receptor engagement with autophagic cargo and reducing actin dynamics (i.e., SSH1 inhibition) represents an attractive strategy to promote misfolded protein degradation while reducing sEV-mediated cell to cell spread of pathology.
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Affiliation(s)
- Sara Cazzaro
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH, United States
- Department of Molecular Medicine, USF Health Morsani College of Medicine, Tampa, FL, United States
| | - Cenxiao Fang
- Department of Molecular Medicine, USF Health Morsani College of Medicine, Tampa, FL, United States
| | - Hirah Khan
- Department of Molecular Medicine, USF Health Morsani College of Medicine, Tampa, FL, United States
| | - Richard Witas
- Department of Molecular Medicine, USF Health Morsani College of Medicine, Tampa, FL, United States
| | - Teresa R. Kee
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH, United States
- Department of Molecular Medicine, USF Health Morsani College of Medicine, Tampa, FL, United States
| | - Jung-A. A. Woo
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - David E. Kang
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH, United States
- Louis Stokes Cleveland VA Medical Center, Cleveland, OH, United States
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Bamburg JR, Minamide LS, Wiggan O, Tahtamouni LH, Kuhn TB. Cofilin and Actin Dynamics: Multiple Modes of Regulation and Their Impacts in Neuronal Development and Degeneration. Cells 2021; 10:cells10102726. [PMID: 34685706 PMCID: PMC8534876 DOI: 10.3390/cells10102726] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 10/06/2021] [Accepted: 10/07/2021] [Indexed: 02/06/2023] Open
Abstract
Proteins of the actin depolymerizing factor (ADF)/cofilin family are ubiquitous among eukaryotes and are essential regulators of actin dynamics and function. Mammalian neurons express cofilin-1 as the major isoform, but ADF and cofilin-2 are also expressed. All isoforms bind preferentially and cooperatively along ADP-subunits in F-actin, affecting the filament helical rotation, and when either alone or when enhanced by other proteins, promotes filament severing and subunit turnover. Although self-regulating cofilin-mediated actin dynamics can drive motility without post-translational regulation, cells utilize many mechanisms to locally control cofilin, including cooperation/competition with other proteins. Newly identified post-translational modifications function with or are independent from the well-established phosphorylation of serine 3 and provide unexplored avenues for isoform specific regulation. Cofilin modulates actin transport and function in the nucleus as well as actin organization associated with mitochondrial fission and mitophagy. Under neuronal stress conditions, cofilin-saturated F-actin fragments can undergo oxidative cross-linking and bundle together to form cofilin-actin rods. Rods form in abundance within neurons around brain ischemic lesions and can be rapidly induced in neurites of most hippocampal and cortical neurons through energy depletion or glutamate-induced excitotoxicity. In ~20% of rodent hippocampal neurons, rods form more slowly in a receptor-mediated process triggered by factors intimately connected to disease-related dementias, e.g., amyloid-β in Alzheimer’s disease. This rod-inducing pathway requires a cellular prion protein, NADPH oxidase, and G-protein coupled receptors, e.g., CXCR4 and CCR5. Here, we will review many aspects of cofilin regulation and its contribution to synaptic loss and pathology of neurodegenerative diseases.
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Affiliation(s)
- James R. Bamburg
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523, USA; (L.S.M.); (O.W.); (L.H.T.); (T.B.K.)
- Correspondence: ; Tel.: +1-970-988-9120; Fax: +1-970-491-0494
| | - Laurie S. Minamide
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523, USA; (L.S.M.); (O.W.); (L.H.T.); (T.B.K.)
| | - O’Neil Wiggan
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523, USA; (L.S.M.); (O.W.); (L.H.T.); (T.B.K.)
| | - Lubna H. Tahtamouni
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523, USA; (L.S.M.); (O.W.); (L.H.T.); (T.B.K.)
- Department of Biology and Biotechnology, The Hashemite University, Zarqa 13115, Jordan
| | - Thomas B. Kuhn
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523, USA; (L.S.M.); (O.W.); (L.H.T.); (T.B.K.)
- Department of Chemistry and Biochemistry, University of Alaska, Fairbanks, AK 99775, USA
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Festa BP, Barbosa AD, Rob M, Rubinsztein DC. The pleiotropic roles of autophagy in Alzheimer's disease: From pathophysiology to therapy. Curr Opin Pharmacol 2021; 60:149-157. [PMID: 34419832 PMCID: PMC8519395 DOI: 10.1016/j.coph.2021.07.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 07/19/2021] [Indexed: 01/02/2023]
Abstract
Autophagy is a lysosomal degradation pathway and the main clearance route of many toxic protein aggregates. The molecular pathology of Alzheimer's disease (AD) manifests in the form of protein aggregates-extracellular amyloid-β depositions and intracellular tau neurofibrillary tangles. Perturbations at different steps of the autophagy pathway observed in cellular and animal models of AD might contribute to amyloid-β and tau accumulation. Increased levels of autophagosomes detected in patients' brains suggest an alteration of autophagy in human disease. Autophagy is also involved in the fine-tuning of inflammation, which increases in the early stages of AD and possibly drives its pathogenesis. Mounting evidence of a causal link between impaired autophagy and AD pathology uncovers an exciting opportunity for the development of autophagy-based therapeutics.
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Affiliation(s)
- Beatrice Paola Festa
- Department of Medical Genetics, Cambridge Institute for Medical Research (CIMR), University of Cambridge, Cambridge, UK; UK Dementia Research Institute, Cambridge Institute for Medical Research (CIMR), University of Cambridge, Cambridge, UK
| | - Antonio Daniel Barbosa
- Department of Medical Genetics, Cambridge Institute for Medical Research (CIMR), University of Cambridge, Cambridge, UK; UK Dementia Research Institute, Cambridge Institute for Medical Research (CIMR), University of Cambridge, Cambridge, UK
| | - Matea Rob
- Department of Medical Genetics, Cambridge Institute for Medical Research (CIMR), University of Cambridge, Cambridge, UK; UK Dementia Research Institute, Cambridge Institute for Medical Research (CIMR), University of Cambridge, Cambridge, UK
| | - David C Rubinsztein
- Department of Medical Genetics, Cambridge Institute for Medical Research (CIMR), University of Cambridge, Cambridge, UK; UK Dementia Research Institute, Cambridge Institute for Medical Research (CIMR), University of Cambridge, Cambridge, UK.
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Lin CQ, Chen LK. Effect of differential hypoxia-related gene expression on glioblastoma. J Int Med Res 2021; 49:3000605211013774. [PMID: 34024193 PMCID: PMC8150423 DOI: 10.1177/03000605211013774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Objective Glioblastoma (GB) is a refractory malignancy with a high rate of recurrence and treatment resistance. Hypoxia-related genes are promising prognostic indicators for GB, so we herein developed a reliable hypoxia-related gene risk scoring model to predict the prognosis of patients with GB. Method Gene expression profiles and corresponding clinicopathological features of patients with GB were obtained from the Cancer Genome Atlas (TCGA; n = 160) and Gene Expression Omnibus (GEO) GSE7696 (n = 80) databases. Univariate and multivariate Cox regression analyses of differentially expressed hypoxia-related genes were performed using R 3.5.1 software. Result Fourteen prognosis-related genes were identified and used to construct a risk signature. Patients with high-risk scores had significantly lower overall survival (OS) than those with low-risk scores. The median risk score was used as a critical value and for OS prediction in an independent external verification GSE7696 cohort. Risk score was not significantly affected by clinical-related factors. We also developed a prediction nomogram based on the TCGA training set to predict survival rates, and included six independent prognostic parameters in the TCGA prediction model. Conclusion We determined a reliable hypoxia-related gene risk scoring model for predicting the prognosis of patients with GB.
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Affiliation(s)
- Chao-Qun Lin
- School of Medicine, Southeast University, Nanjing, Jiangsu, China
| | - Lu-Kui Chen
- School of Medicine, Southeast University, Nanjing, Jiangsu, China.,Department of Neurosurgery, Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
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