1
|
Ren QW, Liu TY, Lan HJ, Li ZC, Huang MJ, Zhao YT, Chen Y, Liao LN, Ma XH, Liu JZ. Partially knocking out NtPDK1a/1b/1c/1d simultaneously in Nicotiana tabacum using CRISPR/CAS9 technology results in auxin-related developmental defects. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2024; 343:112057. [PMID: 38460553 DOI: 10.1016/j.plantsci.2024.112057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 02/07/2024] [Accepted: 03/02/2024] [Indexed: 03/11/2024]
Abstract
The eukaryotic AGC protein kinase subfamily (protein kinase A/ protein kinase G/ protein kinase C-family) is involved in regulating numerous biological processes across kingdoms, including growth and development, and apoptosis. PDK1(3-phosphoinositide-dependent protein kinase 1) is a conserved serine/threonine kinase in eukaryotes, which is both a member of AGC kinase and a major regulator of many other downstream AGC protein kinase family members. Although extensively investigated in model plant Arabidopsis, detailed reports for tobacco PDK1s have been limited. To better understand the functions of PDK1s in tobacco, CRISPR/CAS9 transgenic lines were generated in tetraploid N. tabacum, cv. Samsun (NN) with 5-7 of the 8 copies of 4 homologous PDK1 genes in tobacco genome (NtPDK1a/1b/1c/1d homologs) simultaneously knocked out. Numerous developmental defects were observed in these NtPDK1a/1b/1c/1d CRISPR/CAS9 lines, including cotyledon fusion leaf shrinkage, uneven distribution of leaf veins, convex veins, root growth retardation, and reduced fertility, all of which reminiscence of impaired polar auxin transport. The severity of these defects was correlated with the number of knocked out alleles of NtPDK1a/1b/1c/1d. Consistent with the observation in Arabidopsis, it was found that the polar auxin transport, and not auxin biosynthesis, was significantly compromised in these knockout lines compared with the wild type tobacco plants. The fact that no homozygous plant with all 8 NtPDK1a/1b/1c/1d alleles being knocked out suggested that knocking out 8 alleles of NtPDK1a/1b/1c/1d could be lethal. In conclusion, our results indicated that NtPDK1s are versatile AGC kinases that participate in regulation of tobacco growth and development via modulating polar auxin transport. Our results also indicated that CRISPR/CAS9 technology is a powerful tool in resolving gene redundancy in polyploidy plants.
Collapse
Affiliation(s)
- Qian-Wei Ren
- College of Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
| | - Tian-Yao Liu
- College of Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
| | - Hu-Jiao Lan
- College of Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
| | - Zhen-Chao Li
- College of Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
| | - Min-Jun Huang
- College of Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
| | - Ya-Ting Zhao
- College of Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
| | - Yu Chen
- College of Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
| | - Li-Na Liao
- College of Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
| | - Xiao-Han Ma
- College of Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
| | - Jian-Zhong Liu
- College of Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004, China; Zhejiang Provincial Key Laboratory of Biotechnology on Specialty Economic Plants, Zhejiang Normal University, Jinhua, Zhejiang 321004, China; Institute of Genetics and Developmental Biology, Zhejiang Normal University, Jinhua, Zhejiang 321004, China.
| |
Collapse
|
2
|
Wu F, Chen R, Li Y, Wan Y, Hu J. Unregistered Hexaphenoxycyclotriphosphazene and Its Metabolite Antagonize Retinoic Acid and Retinoic X Receptors and Cause Early Developmental Damage. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:20551-20558. [PMID: 38037888 DOI: 10.1021/acs.est.3c07997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
Hexaphenoxycyclotriphosphazene (HPCTP), an unregistered chemical, has been used as a substitute for triphenyl phosphate in flame retardants and plasticizers. Here, we identified its metabolite, pentaphenoxycyclotriphosphazene (PPCTP) in the liver of Japanese medaka exposed to HPCTP. When sexually mature female medaka were exposed to HPCTP at 37.0, 90.4, and 465.4 ng/L for 35 days, the HPCTP concentration (642.1-2531.9 ng/g lipid weight [lw]) in the embryos considerably exceeded that (34.7-298.1 ng/g lw) in the maternal muscle, indicating remarkable maternal transfer. During 0-9 days postfertilization, the HPCTP concentration in the embryos decreased continuously, while the PPCTP concentration increased. HPCTP and PPCTP antagonized the retinoic X receptor with 50% inhibitory concentrations (IC50) of 34.8 and 21.2 μM, respectively, and PPCTP also antagonized the retinoic acid receptor with IC50 of 2.79 μM. Such antagonistic activities may contribute to eye deformity (4.7% at 465.4 ng/L), body malformation (2.1% at 90.4 ng/L and 6.8% at 465.4 ng/L), and early developmental mortality (11.6-21.7% in all exposure groups) of the embryos. HPCTP was detected in a main tributary of the Yangtze River Basin. Thus, HPCTP poses a risk to wild fish populations, given the developmental toxicities associated with this chemical and its metabolite.
Collapse
Affiliation(s)
- Feifan Wu
- MOE Laboratory for Earth Surface Process, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Ruichao Chen
- MOE Laboratory for Earth Surface Process, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Yu Li
- MOE Laboratory for Earth Surface Process, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Yi Wan
- MOE Laboratory for Earth Surface Process, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Jianying Hu
- MOE Laboratory for Earth Surface Process, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| |
Collapse
|
3
|
Zheng N, Wei J, Wu D, Xu Y, Guo J. Master kinase PDK1 in tumorigenesis. Biochim Biophys Acta Rev Cancer 2023; 1878:188971. [PMID: 37640147 DOI: 10.1016/j.bbcan.2023.188971] [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: 05/11/2023] [Revised: 07/13/2023] [Accepted: 08/05/2023] [Indexed: 08/31/2023]
Abstract
3-phosphoinositide-dependent protein kinase 1 (PDK1) is considered as master kinase regulating AGC kinase family members such as AKT, SGK, PLK, S6K and RSK. Although autophosphorylation regulates PDK1 activity, accumulating evidence suggests that PDK1 is manipulated by many other mechanisms, including S6K-mediated phosphorylation, and the E3 ligase SPOP-mediated ubiquitination and degradation. Dysregulation of these upstream regulators or downstream signals involves in cancer development, as PDK1 regulating cell growth, metastasis, invasion, apoptosis and survival time. Meanwhile, overexpression of PDK1 is also exposed in a plethora of cancers, whereas inhibition of PDK1 reduces cell size and inhibits tumor growth and progression. More importantly, PDK1 also modulates the tumor microenvironments and markedly influences tumor immunotherapies. In summary, we comprehensively summarize the downstream signals, upstream regulators, mouse models, inhibitors, tumor microenvironment and clinical treatments for PDK1, and highlight PDK1 as a potential cancer therapeutic target.
Collapse
Affiliation(s)
- Nana Zheng
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou 215006, China
| | - Jiaqi Wei
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou 215006, China
| | - Depei Wu
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou 215006, China.
| | - Yang Xu
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou 215006, China.
| | - Jianping Guo
- Institute of Precision Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510275, China.
| |
Collapse
|
4
|
Zhang Y, Nong H, Bai Y, Zhou Q, Zhang Q, Liu M, Liu P, Zeng G, Zong S. Conditional knockout of PDK1 in osteoclasts suppressed osteoclastogenesis and ameliorated prostate cancer-induced osteolysis in murine model. Eur J Med Res 2023; 28:433. [PMID: 37828580 PMCID: PMC10571267 DOI: 10.1186/s40001-023-01425-8] [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: 12/02/2021] [Accepted: 10/03/2023] [Indexed: 10/14/2023] Open
Abstract
BACKGROUND The development and maintenance of normal bone tissue is maintained by balanced communication between osteoblasts and osteoclasts. The invasion of cancer cells disrupts this balance, leading to osteolysis. As the only bone resorbing cells in vivo, osteoclasts play important roles in cancer-induced osteolysis. However, the role of 3-phosphoinositide-dependent protein kinase-1 (PDK1) in osteoclast resorption remains unclear. METHODS In our study, we used a receptor activator of nuclear factor-kappa B (RANK) promoter-driven Cre-LoxP system to conditionally delete the PDK1 gene in osteoclasts in mice. We observed the effect of osteoclast-specific knockout of PDK1 on prostate cancer-induced osteolysis. Bone marrow-derived macrophage cells (BMMs) were extracted and induced to differentiate osteoclasts in vitro to explore the role of PDK1 in osteoclasts. RESULTS In this study, we found that PDK1 conditional knockout (cKO) mice exhibited smaller body sizes when compared to the wild-type (WT) mice. Moreover, deletion of PDK1 in osteoclasts ameliorated osteolysis and rPDK1educed bone resorption markers in the murine model of prostate cancer-induced osteolysis. In vivo, we discovered that osteoclast-specific knockout of suppressed RANKL-induced osteoclastogenesis, bone resorption function, and osteoclast-specific gene expression (Ctsk, TRAP, MMP-9, NFATc1). Western blot analyses of RANKL-induced signaling pathways showed that conditional knockout of PDK1 in osteoclasts inhibited the early nuclear factor κB (NF-κB) activation, which consequently suppressed the downstream induction of NFATc1. CONCLUSION These findings demonstrated that PDK1 performs an important role in osteoclastogenesis and prostate cancer-induced osteolysis by modulating the PDK1/AKT/NF-κB signaling pathway.
Collapse
Affiliation(s)
- Yanan Zhang
- Guangxi Collaborative Innovation Center for Biomedicine, Guangxi Medical University, Nanning, China
- Department of Spine Osteopathia, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Haibin Nong
- Department of Spine Osteopathia, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Yiguang Bai
- Department of Spine Osteopathia, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
- Department of Orthopaedics, Nanchong Central Hospital, The Second Clinical Institute of North Sichuan Medical College, Nanchong, China
| | - Quan Zhou
- Guangxi Collaborative Innovation Center for Biomedicine, Guangxi Medical University, Nanning, China
| | - Qiong Zhang
- College of Public Hygiene of Guangxi Medical University, Nanning, China
| | - Mingfu Liu
- Department of Spine Osteopathia, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Pan Liu
- Department of Spine Osteopathia, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Gaofeng Zeng
- College of Public Hygiene of Guangxi Medical University, Nanning, China.
| | - Shaohui Zong
- Department of Spine Osteopathia, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.
- Research Centre for Regenerative Medicine and Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi, China.
| |
Collapse
|
5
|
Luo H, Yang Z, Li J, Jin H, Jiang M, Shan C. Deletion of PDK 1 Caused Cardiac Malmorphogenesis and Heart Defects Due to Profound Protein Phosphorylation Changes Mediated by SHP 2. J Cardiovasc Transl Res 2023; 16:1220-1231. [PMID: 36988860 DOI: 10.1007/s12265-023-10380-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 03/14/2023] [Indexed: 03/30/2023]
Abstract
Phosphoinositide-dependent protein kinase-1 (PDK1), a master kinase and involved in multiple signaling transduction, participates in regulating embryonic cardiac development and postnatal cardiac remodeling. Germline PDK1 knockout mice displayed no heart development; in this article, we deleted PDK1 in heart tissue with different cre to characterize the temporospatial features and find the relevance with congenital heart disease(CHD), furthermore to investigate the underlying mechanism. Knocking out PDK1 with Nkx2.5-cre, the heart showed prominent pulmonic stenosis. Ablated PDK1 with Mef2cSHF-cre, the second heart field (SHF) exhibited severe hypoplasia. And deleted PDK1 with αMHC-cre, the mice displayed dilated heart disease, protein analysis indicated PI3K and ERK were activated; meanwhile, PDK1-AKT-GSK3, and S6K-S6 were disrupted; phosphorylation level of Akt473, S6k421/424, and Gsk3α21 enhanced; however, Akt308, S6k389, and Gsk3β9 decreased. In mechanism investigation, we found SHP2 membrane localization and phosphorylation level of SHP2542 elevated, which suggested SHP2 likely mediated the disruption.
Collapse
Affiliation(s)
- Hongmei Luo
- Guangdong Medical University, Guangdong Dongguan, 523808, China.
- Model Animal Research Center, Nanjing University, Jiangsu Nanjing, 210028, China.
| | - Zhongzhou Yang
- Model Animal Research Center, Nanjing University, Jiangsu Nanjing, 210028, China
| | - Jie Li
- Model Animal Research Center, Nanjing University, Jiangsu Nanjing, 210028, China
| | - Hengwei Jin
- Model Animal Research Center, Nanjing University, Jiangsu Nanjing, 210028, China
| | - Mingyang Jiang
- Model Animal Research Center, Nanjing University, Jiangsu Nanjing, 210028, China
| | - Congjia Shan
- Model Animal Research Center, Nanjing University, Jiangsu Nanjing, 210028, China
| |
Collapse
|
6
|
Green JR, Mahalingaiah PKS, Gopalakrishnan SM, Liguori MJ, Mittelstadt SW, Blomme EAG, Van Vleet TR. Off-target pharmacological activity at various kinases: Potential functional and pathological side effects. J Pharmacol Toxicol Methods 2023; 123:107468. [PMID: 37553032 DOI: 10.1016/j.vascn.2023.107468] [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: 03/23/2023] [Revised: 06/16/2023] [Accepted: 08/01/2023] [Indexed: 08/10/2023]
Abstract
In drug discovery, during the lead optimization and candidate characterization stages, novel small molecules are frequently evaluated in a battery of in vitro pharmacology assays to identify potential unintended, off-target interactions with various receptors, transporters, ion channels, and enzymes, including kinases. Furthermore, these screening panels may also provide utility at later stages of development to provide a mechanistic understanding of unexpected safety findings. Here, we present a compendium of the most likely functional and pathological outcomes associated with interaction(s) to a panel of 95 kinases based on an extensive curation of the scientific literature. This panel of kinases was designed by AbbVie based on safety-related data extracted from the literature, as well as from over 20 years of institutional knowledge generated from discovery efforts. For each kinase, the scientific literature was reviewed using online databases and the most often reported functional and pathological effects were summarized. This work should serve as a practical guide for small molecule drug discovery scientists and clinical investigators to predict and/or interpret adverse effects related to pharmacological interactions with these kinases.
Collapse
Affiliation(s)
- Jonathon R Green
- Departments of Preclinical Safety, AbbVie, 1 North Waukegan Road, North Chicago, IL 60064, United States.
| | | | - Sujatha M Gopalakrishnan
- Drug Discovery Science and Technology, AbbVie, 1 North Waukegan Road, North Chicago, IL 60064, United States
| | - Michael J Liguori
- Departments of Preclinical Safety, AbbVie, 1 North Waukegan Road, North Chicago, IL 60064, United States
| | - Scott W Mittelstadt
- Departments of Preclinical Safety, AbbVie, 1 North Waukegan Road, North Chicago, IL 60064, United States
| | - Eric A G Blomme
- Departments of Preclinical Safety, AbbVie, 1 North Waukegan Road, North Chicago, IL 60064, United States
| | - Terry R Van Vleet
- Departments of Preclinical Safety, AbbVie, 1 North Waukegan Road, North Chicago, IL 60064, United States
| |
Collapse
|
7
|
Li C, Zhou Y, Niu Y, He W, Wang X, Zhang X, Wu Y, Zhang W, Zhao L, Zheng H, Song W, Gao H. Deficiency of Pdk1 drives heart failure by impairing taurine homeostasis through Slc6a6. FASEB J 2023; 37:e23134. [PMID: 37561545 DOI: 10.1096/fj.202300272r] [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: 02/14/2023] [Revised: 06/19/2023] [Accepted: 07/27/2023] [Indexed: 08/11/2023]
Abstract
3-Phosphoinositide-dependent protein kinase-1 (Pdk1) as a serine/threonine protein kinase plays a critical role in multiple signaling pathways. Analysis of the gene expression omnibus database showed that Pdk1 was significantly downregulated in patients with heart diseases. Gene set enrichment analysis of the proteomics dataset identified apoptotic- and metabolism-related signaling pathways directly targeted by Pdk1. Previously, our research indicated that Pdk1 deletion-induced metabolic changes might be involved in the pathogenesis of heart failure; however, the underlying mechanism remains elusive. Here, we demonstrated that deficiency of Pdk1 resulted in apoptosis, oxidative damage, and disturbed metabolism, both in vivo and in vitro. Furthermore, profiling of metabonomics by 1 H-NMR demonstrated that taurine was the major differential metabolite in the heart of Pdk1-knockout mice. Taurine treatment significantly reduced the reactive oxygen species production and apoptosis, improved cardiac function, and prolonged the survival time in Pdk1 deficient mice. Proteomic screening identified solute carrier family 6 member 6 (Slc6a6) as the downstream that altered taurine levels in Pdk1-expression cells. Consistently, cellular apoptosis and oxidative damage were rescued by Slc6a6 in abnormal Pdk1 expression cells. These findings collectively suggest that Pdk1 deficiency induces heart failure via disturbances in taurine homeostasis, triggered by Slc6a6.
Collapse
Affiliation(s)
- Chen Li
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
- Key Laboratory of Alzheimer's Disease of Zhejiang Province, Institute of Aging, Wenzhou Medical University, Wenzhou, China
- Key Laboratory of Efficacy Evaluation of Traditional Chinese Medicine and Encephalopathy Research of Zhejiang Province, Wenzhou, China
| | - Yi Zhou
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Yan Niu
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Wenting He
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Xinyi Wang
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Xi Zhang
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Yali Wu
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Wenli Zhang
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Liangcai Zhao
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Hong Zheng
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Weihong Song
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
- Key Laboratory of Alzheimer's Disease of Zhejiang Province, Institute of Aging, Wenzhou Medical University, Wenzhou, China
| | - Hongchang Gao
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
- Key Laboratory of Alzheimer's Disease of Zhejiang Province, Institute of Aging, Wenzhou Medical University, Wenzhou, China
- Key Laboratory of Efficacy Evaluation of Traditional Chinese Medicine and Encephalopathy Research of Zhejiang Province, Wenzhou, China
| |
Collapse
|
8
|
Qin J, Cao M, Hu X, Tan W, Ma B, Cao Y, Chen Z, Li Q, Hu G. Dual inhibitors of ASK1 and PDK1 kinases: Design, synthesis, molecular docking and mechanism studies of N-benzyl pyridine-2-one containing derivatives as anti-fibrotic agents. Eur J Med Chem 2023; 247:115057. [PMID: 36603508 DOI: 10.1016/j.ejmech.2022.115057] [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: 11/10/2022] [Revised: 12/22/2022] [Accepted: 12/26/2022] [Indexed: 12/31/2022]
Abstract
Utilizing fragment-based hybrid designing strategies, 24 N-benzyl pyridine-2-one containing derivatives were synthesized by successfully incorporating 6-(4H-1,2,4-triazol-3-yl) pyridin-2-amine of scaffold of ASK1 inhibitor (GS-444217). These newly synthesized compounds were screened in cell-free ASK1 and PDK1 kinase and cellular vitality assays. Among all compounds tested, both 21c and 21d displayed single digit potency of 9.13, 1.73 nM in inhibiting ASK1, and exhibited excellent enzyme inhibitory activity against PDK1 (the inhibition rates at 10 μM were 13.63% and 23.80%, respectively). Specifically, both compounds inhibited the TGF-β1 induced fibrotic response and blocked the up-regulated protein expression levels of ASK1-p38/JNK signaling pathways and possessed the potency in reducing PDK1/Akt phosphorylation. The results herein showed the potential lead characteristics of 21c or 21d as dual inhibitors ASK1/PDK1 kinases.
Collapse
Affiliation(s)
- Jia Qin
- Department of Medicinal Chemistry, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410013, Hunan, China; Hunan Key Laboratory of Small Molecules for Diagnosis and Treatment of Chronic Disease, Changsha, 410013, Hunan, China; Hunan Key Laboratory of Organ Fibrosis, Changsha, 410013, Hunan, China
| | - Meng Cao
- Department of Medicinal Chemistry, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410013, Hunan, China; Hunan Key Laboratory of Small Molecules for Diagnosis and Treatment of Chronic Disease, Changsha, 410013, Hunan, China; Hunan Key Laboratory of Organ Fibrosis, Changsha, 410013, Hunan, China
| | - Xinlan Hu
- Department of Medicinal Chemistry, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410013, Hunan, China; Hunan Key Laboratory of Small Molecules for Diagnosis and Treatment of Chronic Disease, Changsha, 410013, Hunan, China; Hunan Key Laboratory of Organ Fibrosis, Changsha, 410013, Hunan, China
| | - Wenhua Tan
- Department of Medicinal Chemistry, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410013, Hunan, China; Hunan Key Laboratory of Small Molecules for Diagnosis and Treatment of Chronic Disease, Changsha, 410013, Hunan, China; Hunan Key Laboratory of Organ Fibrosis, Changsha, 410013, Hunan, China
| | - Binghao Ma
- Department of Medicinal Chemistry, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410013, Hunan, China; Hunan Key Laboratory of Small Molecules for Diagnosis and Treatment of Chronic Disease, Changsha, 410013, Hunan, China; Hunan Key Laboratory of Organ Fibrosis, Changsha, 410013, Hunan, China
| | - Yuanyuan Cao
- Department of Medicinal Chemistry, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410013, Hunan, China; Hunan Key Laboratory of Small Molecules for Diagnosis and Treatment of Chronic Disease, Changsha, 410013, Hunan, China; Hunan Key Laboratory of Organ Fibrosis, Changsha, 410013, Hunan, China
| | - Zhuo Chen
- Department of Medicinal Chemistry, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410013, Hunan, China; Hunan Key Laboratory of Small Molecules for Diagnosis and Treatment of Chronic Disease, Changsha, 410013, Hunan, China; Hunan Key Laboratory of Organ Fibrosis, Changsha, 410013, Hunan, China
| | - Qianbin Li
- Department of Medicinal Chemistry, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410013, Hunan, China; Hunan Key Laboratory of Small Molecules for Diagnosis and Treatment of Chronic Disease, Changsha, 410013, Hunan, China; Hunan Key Laboratory of Organ Fibrosis, Changsha, 410013, Hunan, China.
| | - Gaoyun Hu
- Department of Medicinal Chemistry, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410013, Hunan, China; Hunan Key Laboratory of Small Molecules for Diagnosis and Treatment of Chronic Disease, Changsha, 410013, Hunan, China; Hunan Key Laboratory of Organ Fibrosis, Changsha, 410013, Hunan, China.
| |
Collapse
|
9
|
Hu YJ, Song GY, Zhang F, Zhang N, Wang F, Wang JL, Wang X, Wang TY, Li YF, Yan YD, Dou WT, Cheng CY, Xu P. Activation of long-non-coding RNA NEAT1 sponging microRNA-147 inhibits radiation damage by targeting PDPK1 in troxerutin radioprotection. iScience 2023; 26:105932. [PMID: 36698722 PMCID: PMC9868541 DOI: 10.1016/j.isci.2023.105932] [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] [Received: 05/11/2022] [Revised: 11/26/2022] [Accepted: 01/03/2023] [Indexed: 01/06/2023] Open
Abstract
A better understanding of the molecular mechanism involving the lncRNA-miRNA-mRNA network underlying radiation damage can be beneficial for radioprotection. This study was designed to investigate the potential role of lncRNA NEAT1, miR-147 and Phosphoinositide Dependent Protein Kinase 1 (PDPK1) interaction in radioprotection by troxerutin (TRT). We first demonstrated that NEAT1 sponged miR-147, and PDPK1 mRNA was the primary target of miR-147. In the cells, the NEAT1 and PDPK1 levels were downregulated after the radiation but increased after the treatment with TRT. The miR-147 level was significantly induced by radiation and inhibited by TRT. NEAT1 negatively regulated the expression of miR-147, whereas miR-47 targeted PDPK1 to downregulate its expression. In radioprotection, TRT effectively upregulated NEAT1 to inhibit miR-147 and to upregulate PDPK1. We concluded that TRT could promote radioprotection by stimulating NEAT1 to upregulate PDPK1 expression by suppressing miR-147. NEAT1 could be a critical therapeutic target of radiation damage.
Collapse
Affiliation(s)
- Yong-jian Hu
- School of Food and Biomedicine, Zaozhuang University, Zaozhuang, Shandong 277160, China,Henan Key Laboratory of Medical Tissue Regeneration, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Gui-yuan Song
- School of Food and Biomedicine, Zaozhuang University, Zaozhuang, Shandong 277160, China,School of Public Health, Weifang Medical University, Weifang, Shandong 261000, China,Radiology Laboratory, Central Laboratory, Rizhao People’s Hospital, Rizhao, Shandong 276800, China
| | - Fan Zhang
- School of Food and Biomedicine, Zaozhuang University, Zaozhuang, Shandong 277160, China,Henan Key Laboratory of Medical Tissue Regeneration, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Nan Zhang
- School of Food and Biomedicine, Zaozhuang University, Zaozhuang, Shandong 277160, China
| | - Fei Wang
- School of Food and Biomedicine, Zaozhuang University, Zaozhuang, Shandong 277160, China
| | - Jing-long Wang
- School of Food and Biomedicine, Zaozhuang University, Zaozhuang, Shandong 277160, China
| | - Xia Wang
- College of Medical Laboratory, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Tao-yang Wang
- School of Food and Biomedicine, Zaozhuang University, Zaozhuang, Shandong 277160, China,Henan Key Laboratory of Medical Tissue Regeneration, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Yu-feng Li
- Radiology Laboratory, Central Laboratory, Rizhao People’s Hospital, Rizhao, Shandong 276800, China
| | - Yi-di Yan
- Basic Medical School, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Wen-tao Dou
- Basic Medical School, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Chen-yi Cheng
- Basic Medical School, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Ping Xu
- School of Food and Biomedicine, Zaozhuang University, Zaozhuang, Shandong 277160, China,Henan Key Laboratory of Medical Tissue Regeneration, Xinxiang Medical University, Xinxiang, Henan 453003, China,Corresponding author
| |
Collapse
|
10
|
Scalia P, Williams SJ, Fujita-Yamaguchi Y, Giordano A. Cell cycle control by the insulin-like growth factor signal: at the crossroad between cell growth and mitotic regulation. Cell Cycle 2023; 22:1-37. [PMID: 36005738 PMCID: PMC9769454 DOI: 10.1080/15384101.2022.2108117] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
In proliferating cells and tissues a number of checkpoints (G1/S and G2/M) preceding cell division (M-phase) require the signal provided by growth factors present in serum. IGFs (I and II) have been demonstrated to constitute key intrinsic components of the peptidic active fraction of mammalian serum. In vivo genetic ablation studies have shown that the cellular signal triggered by the IGFs through their cellular receptors represents a non-replaceable requirement for cell growth and cell cycle progression. Retroactive and current evaluation of published literature sheds light on the intracellular circuitry activated by these factors providing us with a better picture of the pleiotropic mechanistic actions by which IGFs regulate both cell size and mitogenesis under developmental growth as well as in malignant proliferation. The present work aims to summarize the cumulative knowledge learned from the IGF ligands/receptors and their intracellular signaling transducers towards control of cell size and cell-cycle with particular focus to their actionable circuits in human cancer. Furthermore, we bring novel perspectives on key functional discriminants of the IGF growth-mitogenic pathway allowing re-evaluation on some of its signal components based upon established evidences.
Collapse
Affiliation(s)
- Pierluigi Scalia
- ISOPROG-Somatolink EPFP Research Network, Philadelphia, PA, USA, Caltanissetta, Italy,CST, Biology, Sbarro Institute for Cancer Research and Molecular Medicine, Temple University, Philadelphia, PA, United states,CONTACT Pierluigi Scalia ISOPROG-Somatolink EPFP Research Network, Philadelphia, PA9102, USA
| | - Stephen J Williams
- ISOPROG-Somatolink EPFP Research Network, Philadelphia, PA, USA, Caltanissetta, Italy,CST, Biology, Sbarro Institute for Cancer Research and Molecular Medicine, Temple University, Philadelphia, PA, United states
| | - Yoko Fujita-Yamaguchi
- Arthur Riggs Diabetes & Metabolism Research Institute, Beckman Research Institute of City of Hope, Duarte, CA, USA
| | - Antonio Giordano
- ISOPROG-Somatolink EPFP Research Network, Philadelphia, PA, USA, Caltanissetta, Italy,School of Medical Biotechnology, University of Siena, Italy
| |
Collapse
|
11
|
De Novo Transcriptome Assembly and Analysis of Longevity Genes Using Subterranean Termite ( Reticulitermes chinensis) Castes. Int J Mol Sci 2022; 23:ijms232113660. [PMID: 36362447 PMCID: PMC9657995 DOI: 10.3390/ijms232113660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 10/20/2022] [Accepted: 10/31/2022] [Indexed: 11/09/2022] Open
Abstract
The longevity phenomenon is entirely controlled by the insulin signaling pathway (IIS-pathway). Both vertebrates and invertebrates have IIS-pathways that are comparable to one another, though no one has previously described de novo transcriptome assembly of IIS-pathway-associated genes in termites. In this research, we analyzed the transcriptomes of both reproductive (primary kings “PK” and queens “PQ”, secondary worker reproductive kings “SWRK” and queens “SWRQ”) and non-reproductive (male “WM” and female “WF” workers) castes of the subterranean termite Reticulitermes chinensis. The goal was to identify the genes responsible for longevity in the reproductive and non-reproductive castes. Through transcriptome analysis, we annotated 103,589,264 sequence reads and 184,436 (7G) unigenes were assembled, GC performance was measured at 43.02%, and 64,046 sequences were reported as CDs sequences. Of which 35 IIS-pathway-associated genes were identified, among 35 genes, we focused on the phosphoinositide-dependent kinase-1 (Pdk1), protein kinase B2 (akt2-a), tuberous sclerosis-2 (Tsc2), mammalian target of rapamycin (mTOR), eukaryotic translation initiation factor 4E (EIF4E) and ribosomal protein S6 (RPS6) genes. Previously these genes (Pdk1, akt2-a, mTOR, EIF4E, and RPS6) were investigated in various organisms, that regulate physiological effects, growth factors, protein translation, cell survival, proliferation, protein synthesis, cell metabolism and survival, autophagy, fecundity rate, egg size, and follicle number, although the critical reason for longevity is still unclear in the termite castes. However, based on transcriptome profiling, the IIS-pathway-associated genes could prolong the reproductive caste lifespan and health span. Therefore, the transcriptomic shreds of evidence related to IIS-pathway genes provide new insights into the maintenance and relationships between biomolecular homeostasis and remarkable longevity. Finally, we propose a strategy for future research to decrypt the hidden costs associated with termite aging in reproductive and non-reproductive castes.
Collapse
|
12
|
Ye X, Chen L, Wang H, Peng S, Liu M, Yao L, Zhang Y, Shi YS, Cao Y, Yang JJ, Chen G. Genetic inhibition of PDK1 robustly reduces plaque deposition and ameliorates gliosis in the 5×FAD mouse model of Alzheimer's disease. Neuropathol Appl Neurobiol 2022; 48:e12839. [PMID: 35881686 DOI: 10.1111/nan.12839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 05/05/2022] [Accepted: 07/04/2022] [Indexed: 11/28/2022]
Abstract
AIMS Abundant recent evidence has shown that 3-phosphoinositide-dependent protein kinase 1 (PDK1) is activated in Alzheimer's disease (AD). However, it remains unknown whether inhibition of PDK1 in neurons may affect AD-like pathology in animal models of AD. Here, we aim to examine the effects of specific inactivation of neuronal PDK1 on pathology and behaviour in 5×FAD mice and to identify the underlying molecular mechanisms. METHODS The Cre-loxP system was employed to generate Pdk1 cKO/5×FAD mice, in which PDK1 is inactivated in excitatory neurons in the adult forebrain. Cellular and behavioural techniques were used to examine plaque burden, inflammatory responses and spatial working memory in mice. Biochemical and molecular analyses were conducted to investigate relevant mechanisms. RESULTS First, Aβ deposition was massively decreased and gliosis was highly attenuated in Pdk1 cKO/5×FAD mice compared with 5×FAD mice. Second, memory deficits were significantly improved in Pdk1 cKO/5×FAD mice. Third, APP levels were notably decreased in Pdk1 cKO/5×FAD mice. Fourth, mammalian target of rapamycin (mTOR) signalling and ribosome biogenesis were reduced in Pdk1 cKO/5×FAD mice. CONCLUSIONS Neuron-specific deletion of PDK1 robustly ameliorates AD-like pathology and improves spatial working memory in 5×FAD mice. We propose that genetic approach to inhibit PDK1 may be an effective strategy to slow AD.
Collapse
Affiliation(s)
- Xiaolian Ye
- MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, Nanjing, China
| | - Lu Chen
- MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, Nanjing, China
| | - He Wang
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Shixiao Peng
- MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, Nanjing, China
| | - Mengjia Liu
- MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, Nanjing, China
| | - Liyang Yao
- MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, Nanjing, China
| | - Yizhi Zhang
- MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, Nanjing, China
| | - Yun Stone Shi
- MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, Nanjing, China
| | - Ying Cao
- MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, Nanjing, China
| | - Jian-Jun Yang
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Guiquan Chen
- MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, Nanjing, China
| |
Collapse
|
13
|
Perry CH, Mullins NA, Sweileh RB, Shendy NA, Roberto PA, Broadhurst AL, Nelson HA, Miranda-Carboni GA, Abell AN. MAP3K4 promotes fetal and placental growth by controlling the receptor tyrosine kinases IGF1R/IR and Akt signaling pathway†. J Biol Chem 2022; 298:102310. [PMID: 35921893 PMCID: PMC9463538 DOI: 10.1016/j.jbc.2022.102310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 07/12/2022] [Accepted: 07/14/2022] [Indexed: 11/08/2022] Open
Abstract
Disruption of fetal growth results in severe consequences to human health, including increased fetal and neonatal morbidity and mortality, as well as potential lifelong health problems. Molecular mechanisms promoting fetal growth represent potential therapeutic strategies to treat and/or prevent fetal growth restriction (FGR). Here, we identify a previously unknown role for the mitogen-activated protein kinase kinase kinase 4 (MAP3K4) in promoting fetal and placental growth. We demonstrate that inactivation of MAP3K4 kinase activity causes FGR due in part to placental insufficiency. Significantly, MAP3K4 kinase–inactive mice display highly penetrant lethality prior to weaning and persistent growth reduction of surviving adults. Additionally, we elucidate molecular mechanisms by which MAP3K4 promotes growth through control of the insulin-like growth factor 1 receptor (IGF1R), insulin receptor (IR), and Akt signaling pathway. Specifically, MAP3K4 kinase inactivation in trophoblast stem (TS) cells results in reduced IGF1R and IR expression and decreased Akt activation. We observe these changes in TS cells also occur in differentiated trophoblasts created through in vitro differentiation of cultured TS cells and in vivo in placental tissues formed by TS cells. Furthermore, we show that MAP3K4 controls this pathway by promoting Igf1r transcript expression in TS cells through activation of CREB-binding protein (CBP). In the MAP3K4 kinase–inactive TS cells, Igf1r transcripts are repressed because of reduced CBP activity and increased histone deacetylase 6 expression and activity. Together, these data demonstrate a critical role for MAP3K4 in promoting fetal and placental growth by controlling the activity of the IGF1R/IR and Akt signaling pathway.
Collapse
|
14
|
Alam SS, Kumar S, Beauchamp MC, Bareke E, Boucher A, Nzirorera N, Dong Y, Padilla R, Zhang SJ, Majewski J, Jerome-Majewska LA. Snrpb is required in murine neural crest cells for proper splicing and craniofacial morphogenesis. Dis Model Mech 2022; 15:275486. [PMID: 35593225 PMCID: PMC9235875 DOI: 10.1242/dmm.049544] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 05/05/2022] [Indexed: 12/18/2022] Open
Abstract
Heterozygous mutations in SNRPB, an essential core component of the five small ribonucleoprotein particles of the spliceosome, are responsible for cerebrocostomandibular syndrome (CCMS). We show that Snrpb heterozygous mouse embryos arrest shortly after implantation. Additionally, heterozygous deletion of Snrpb in the developing brain and neural crest cells models craniofacial malformations found in CCMS, and results in death shortly after birth. RNAseq analysis of mutant heads prior to morphological defects revealed increased exon skipping and intron retention in association with increased 5′ splice site strength. We found increased exon skipping in negative regulators of the P53 pathway, along with increased levels of nuclear P53 and P53 target genes. However, removing Trp53 in Snrpb heterozygous mutant neural crest cells did not completely rescue craniofacial development. We also found a small but significant increase in exon skipping of several transcripts required for head and midface development, including Smad2 and Rere. Furthermore, mutant embryos exhibited ectopic or missing expression of Fgf8 and Shh, which are required to coordinate face and brain development. Thus, we propose that mis-splicing of transcripts that regulate P53 activity and craniofacial-specific genes contributes to craniofacial malformations. This article has an associated First Person interview with the first author of the paper. Summary: We report the first mouse model for cerebrocostomandibular syndrome, showing that mis-splicing of transcripts that regulate P53 activity and craniofacial-specific genes contributes to craniofacial malformations.
Collapse
Affiliation(s)
- Sabrina Shameen Alam
- Research Institute of the McGill University Health Centre at Glen Site, Montreal, QC H4A 3J1, Canada.,Department of Human Genetics, McGill University, Montreal, QC H3A 0G1, Canada
| | - Shruti Kumar
- Research Institute of the McGill University Health Centre at Glen Site, Montreal, QC H4A 3J1, Canada.,Department of Human Genetics, McGill University, Montreal, QC H3A 0G1, Canada
| | - Marie-Claude Beauchamp
- Research Institute of the McGill University Health Centre at Glen Site, Montreal, QC H4A 3J1, Canada
| | - Eric Bareke
- Department of Human Genetics, McGill University, Montreal, QC H3A 0G1, Canada
| | - Alexia Boucher
- Research Institute of the McGill University Health Centre at Glen Site, Montreal, QC H4A 3J1, Canada.,Department of Anatomy and Cell Biology, McGill University, Montreal, QC H3A 2B2, Canada
| | - Nadine Nzirorera
- Research Institute of the McGill University Health Centre at Glen Site, Montreal, QC H4A 3J1, Canada.,Department of Human Genetics, McGill University, Montreal, QC H3A 0G1, Canada
| | - Yanchen Dong
- Research Institute of the McGill University Health Centre at Glen Site, Montreal, QC H4A 3J1, Canada.,Department of Human Genetics, McGill University, Montreal, QC H3A 0G1, Canada
| | - Reinnier Padilla
- Department of Human Genetics, McGill University, Montreal, QC H3A 0G1, Canada
| | - Si Jing Zhang
- Department of Human Genetics, McGill University, Montreal, QC H3A 0G1, Canada
| | - Jacek Majewski
- Department of Human Genetics, McGill University, Montreal, QC H3A 0G1, Canada
| | - Loydie A Jerome-Majewska
- Research Institute of the McGill University Health Centre at Glen Site, Montreal, QC H4A 3J1, Canada.,Department of Human Genetics, McGill University, Montreal, QC H3A 0G1, Canada.,Department of Anatomy and Cell Biology, McGill University, Montreal, QC H3A 2B2, Canada.,Department of Pediatrics, McGill University, Montreal, QC H4A 3J1, Canada
| |
Collapse
|
15
|
Activation of the essential kinase PDK1 by phosphoinositide-driven trans-autophosphorylation. Nat Commun 2022; 13:1874. [PMID: 35387990 PMCID: PMC8986801 DOI: 10.1038/s41467-022-29368-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 03/08/2022] [Indexed: 12/18/2022] Open
Abstract
3-phosphoinositide-dependent kinase 1 (PDK1) is an essential serine/threonine protein kinase, which plays a crucial role in cell growth and proliferation. It is often referred to as a ‘master’ kinase due to its ability to activate at least 23 downstream protein kinases implicated in various signaling pathways. In this study, we have elucidated the mechanism of phosphoinositide-driven PDK1 auto-activation. We show that PDK1 trans-autophosphorylation is mediated by a PIP3-mediated face-to-face dimer. We report regulatory motifs in the kinase-PH interdomain linker that allosterically activate PDK1 autophosphorylation via a linker-swapped dimer mechanism. Finally, we show that PDK1 is autoinhibited by its PH domain and that positive cooperativity of PIP3 binding drives switch-like activation of PDK1. These results imply that the PDK1-mediated activation of effector kinases, including Akt, PKC, Sgk, S6K and RSK, many of whom are not directly regulated by phosphoinositides, is also likely to be dependent on PIP3 or PI(3,4)P2. The essential protein kinase PDK1 is activated by phospoinositide-mediated dimerization and trans-autophosphorylation. Here, the authors show that in the absence of PIP3 or PI(3,4)P2 phosphoinositides, PDK1 is maintained in an inactive, autoinhibited conformation in the cytosol.
Collapse
|
16
|
S6K1-mediated phosphorylation of PDK1 impairs AKT kinase activity and oncogenic functions. Nat Commun 2022; 13:1548. [PMID: 35318320 PMCID: PMC8941131 DOI: 10.1038/s41467-022-28910-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Accepted: 02/16/2022] [Indexed: 12/13/2022] Open
Abstract
Functioning as a master kinase, 3-phosphoinositide-dependent protein kinase 1 (PDK1) plays a fundamental role in phosphorylating and activating protein kinases A, B and C (AGC) family kinases, including AKT. However, upstream regulation of PDK1 remains largely elusive. Here we report that ribosomal protein S6 kinase beta 1 (S6K1), a member of AGC kinases and downstream target of mechanistic target of rapamycin complex 1 (mTORC1), directly phosphorylates PDK1 at its pleckstrin homology (PH) domain, and impairs PDK1 interaction with and activation of AKT. Mechanistically, S6K1-mediated phosphorylation of PDK1 augments its interaction with 14-3-3 adaptor protein and homo-dimerization, subsequently dissociating PDK1 from phosphatidylinositol 3,4,5 triphosphate (PIP3) and retarding its interaction with AKT. Pathologically, tumor patient-associated PDK1 mutations, either attenuating S6K1-mediated PDK1 phosphorylation or impairing PDK1 interaction with 14-3-3, result in elevated AKT kinase activity and oncogenic functions. Taken together, our findings not only unravel a delicate feedback regulation of AKT signaling via S6K1-mediated PDK1 phosphorylation, but also highlight the potential strategy to combat mutant PDK1-driven cancers. The direct upstream regulation of PDK1 is not fully understood. Here the authors demonstrate that S6K1 directly phosphorylates PDK1 to inhibit AKT kinase activity and its ability to drive tumourigenesis.
Collapse
|
17
|
Yang S, Yang G, Wu H, Kang L, Xiang J, Zheng P, Qiu S, Liang Z, Lu Y, Jia L. MicroRNA-193b impairs muscle growth in mouse models of type 2 diabetes by targeting the PDK1/Akt signalling pathway. Diabetologia 2022; 65:563-581. [PMID: 34913989 PMCID: PMC8803817 DOI: 10.1007/s00125-021-05616-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 08/03/2021] [Indexed: 12/18/2022]
Abstract
AIMS/HYPOTHESIS Type 2 diabetes is associated with a reduction in skeletal muscle mass; however, how the progression of sarcopenia is induced and regulated remains largely unknown. We aimed to find out whether a specific microRNA (miR) may contribute to skeletal muscle atrophy in type 2 diabetes. METHODS Adeno-associated virus (AAV)-mediated skeletal muscle miR-193b overexpression in C57BLKS/J mice, and skeletal muscle miR-193b deficiency in db/db mice were used to explore the function of miR-193b in muscle loss. In C57BL/6 J mice, tibialis anterior-specific deletion of 3-phosphoinositide-dependent protein kinase-1 (PDK1), mediated by in situ AAV injection, was used to confirm whether miR-193b regulates muscle growth through PDK1. Serum miR-193b levels were also analysed in healthy individuals (n = 20) and those with type 2 diabetes (n = 20), and correlations of miR-193b levels with HbA1c, fasting blood glucose (FBG), body composition, triacylglycerols and C-peptide were assessed. RESULTS In this study, we found that serum miR-193b levels increased in individuals with type 2 diabetes and negatively correlated with muscle mass in these participants. Functional studies further showed that AAV-mediated overexpression of miR-193b induced muscle loss and dysfunction in healthy mice. In contrast, suppression of miR-193b attenuated muscle loss and dysfunction in db/db mice. Mechanistic analysis revealed that miR-193b could target Pdk1 expression to inactivate the Akt/mammalian target of rapamycin (mTOR)/p70S6 kinase (S6K) pathway, thereby inhibiting protein synthesis. Therefore, knockdown of PDK1 in healthy mice blocked miR-193b-induced inactivation of the Akt/mTOR/S6K pathway and impairment of muscle growth. CONCLUSIONS/INTERPRETATION Our results identified a previously unrecognised role of miR-193b in muscle function and mass that could be a potential therapeutic target for treating sarcopenia.
Collapse
Affiliation(s)
- Shu Yang
- Department of Endocrinology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, China
- Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University, Guangzhou, China
| | - Guangyan Yang
- Department of Endocrinology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, China
| | - Han Wu
- Department of Endocrinology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, China
- Department of Endocrinology, Key Laboratory of Endocrinology, National Health Commission, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Lin Kang
- Department of Endocrinology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, China
| | - Jiaqing Xiang
- Department of Endocrinology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, China
| | - Peilin Zheng
- Department of Endocrinology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, China
| | - Shanhu Qiu
- Department of Endocrinology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, China
| | - Zhen Liang
- Department of Geriatrics, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, China.
| | - Yan Lu
- Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai, China.
| | - Lijing Jia
- Department of Endocrinology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, China.
| |
Collapse
|
18
|
Han X, Wei Y, Ba R, Sun L, Zhao C. PDK1 Regulates the Lengthening of G1 Phase to Balance RGC Proliferation and Differentiation during Cortical Neurogenesis. Cereb Cortex 2021; 32:3488-3500. [PMID: 34918060 DOI: 10.1093/cercor/bhab428] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 11/02/2021] [Accepted: 11/02/2021] [Indexed: 12/11/2022] Open
Abstract
During cortical development, the balance between progenitor self-renewal and neurogenesis is critical for determining the size/morphology of the cortex. A fundamental feature of the developing cortex is an increase in the length of G1 phase in RGCs over the course of neurogenesis, which is a key determinant of progenitor fate choice. How the G1 length is temporally regulated remains unclear. Here, Pdk1, a member of the AGC kinase family, was conditionally disrupted by crossing an Emx1-Cre mouse line with a Pdk1fl/fl line. The loss of Pdk1 led to a shorter cell cycle accompanied by increased RGC proliferation specifically at late rather than early/middle neurogenic stages, which was attributed to impaired lengthening of G1 phase. Coincidently, apical-to-basal interkinetic nuclear migration was accelerated in Pdk1 cKO cortices. Consequently, we detected an increased neuronal output at P0. We further showed the significant upregulation of the cell cycle regulator cyclin D1 and its activator Myc in the cKO cortices relative to those of control animals. Overall, we have identified a novel role for PDK1 in cortical neurogenesis. PDK1 functions as an upstream regulator of the Myc-cyclin D1 pathway to control the lengthening of G1 phase and the balance between RGC proliferation and differentiation.
Collapse
Affiliation(s)
- Xiaoning Han
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing 210009, China.,Institute of Biomedical Engineering and Health Science, Changzhou University, Changzhou 213164, China
| | - Yongjie Wei
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing 210009, China
| | - Ru Ba
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing 210009, China
| | - Lijuan Sun
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing 210009, China
| | - Chunjie Zhao
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing 210009, China
| |
Collapse
|
19
|
Cuthbert JM, Russell SJ, Polejaeva IA, Meng Q, White KL, Benninghoff AD. Comparing mRNA and sncRNA profiles during the maternal-to-embryonic transition in bovine IVF and scNT embryos. Biol Reprod 2021; 105:1401-1415. [PMID: 34514499 DOI: 10.1093/biolre/ioab169] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 07/09/2021] [Accepted: 09/02/2021] [Indexed: 12/14/2022] Open
Abstract
Production of embryos with high developmental competence by somatic cell nuclear transfer (scNT) is far less efficient than for in vitro fertilized (IVF) embryos, likely due to an accumulation of errors in genome reprogramming that results in aberrant expression of RNA transcripts, including messenger RNAs (mRNA) and, possibly, microRNAs (miRNA). Thus, our objectives were to use RNAseq to determine the dynamics of mRNA expression in early developing scNT and IVF embryos in the context of the maternal-to-embryonic transition (MET) and to correlate apparent transcriptional dysregulation in cloned embryos with miRNA expression profiles. Comparisons between scNT and IVF embryos indicated large scale transcriptome differences, which were most evident at the 8-cell and morula stages for genes associated with biological functions critical for the MET. For two miRNAs previously identified as differentially expressed in scNT morulae, miR-34a and miR-345, negative correlations with some predicted mRNA targets were apparent, though not widespread among the majority of predicted targets. Moreover, although large-scale aberrations in expression of mRNAs were evident during the MET in cattle scNT embryos, these changes were not consistently correlated with aberrations in miRNA expression at the same developmental stage, suggesting that other mechanisms controlling gene expression may be involved.
Collapse
Affiliation(s)
- Jocelyn M Cuthbert
- Department of Animal, Dairy and Veterinary Sciences, 4815 Old Main Hill, Utah State University, Logan, Utah 84322, USA
| | - Stewart J Russell
- CReATe Fertility Centre, 790 Bay St. #1100, Toronto, M5G 1N8, Canada
| | - Irina A Polejaeva
- Department of Animal, Dairy and Veterinary Sciences, 4815 Old Main Hill, Utah State University, Logan, Utah 84322, USA
| | - Qinggang Meng
- Department of Animal, Dairy and Veterinary Sciences, 4815 Old Main Hill, Utah State University, Logan, Utah 84322, USA
| | - Kenneth L White
- Department of Animal, Dairy and Veterinary Sciences, 4815 Old Main Hill, Utah State University, Logan, Utah 84322, USA
| | - Abby D Benninghoff
- Department of Animal, Dairy and Veterinary Sciences, 4815 Old Main Hill, Utah State University, Logan, Utah 84322, USA
| |
Collapse
|
20
|
Jiang Q, Zheng N, Bu L, Zhang X, Zhang X, Wu Y, Su Y, Wang L, Zhang X, Ren S, Dai X, Wu D, Xie W, Wei W, Zhu Y, Guo J. SPOP-mediated ubiquitination and degradation of PDK1 suppresses AKT kinase activity and oncogenic functions. Mol Cancer 2021; 20:100. [PMID: 34353330 PMCID: PMC8340461 DOI: 10.1186/s12943-021-01397-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 07/24/2021] [Indexed: 12/25/2022] Open
Abstract
Background 3-phosphoinositide-dependent protein kinase-1 (PDK1) acts as a master kinase of protein kinase A, G, and C family (AGC) kinase to predominantly govern cell survival, proliferation, and metabolic homeostasis. Although the regulations to PDK1 downstream substrates such as protein kinase B (AKT) and ribosomal protein S6 kinase beta (S6K) have been well established, the upstream regulators of PDK1, especially its degrader, has not been defined yet. Method A clustered regularly interspaced short palindromic repeats (CRISPR)-based E3 ligase screening approach was employed to identify the E3 ubiquitin ligase for degrading PDK1. Western blotting, immunoprecipitation assays and immunofluorescence (IF) staining were performed to detect the interaction or location of PDK1 with speckle-type POZ protein (SPOP). Immunohistochemistry (IHC) staining was used to study the expression of PDK1 and SPOP in prostate cancer tissues. In vivo and in vitro ubiquitination assays were performed to measure the ubiquitination conjugation of PDK1 by SPOP. In vitro kinase assays and mass spectrometry approach were carried out to identify casein kinase 1 (CK1) and glycogen synthase kinase 3 (GSK3)-mediated PDK1 phosphorylation. The biological effects of PDK1 mutations and correlation with SPOP mutations were performed with colony formation, soft agar assays and in vivo xenograft mouse models. Results We identified that PDK1 underwent SPOP-mediated ubiquitination and subsequent proteasome-dependent degradation. Specifically, SPOP directly bound PDK1 by the consensus degron in a CK1/GSK3β-mediated phosphorylation dependent manner. Pathologically, prostate cancer patients associated mutations of SPOP impaired PDK1 degradation and thus activated the AKT kinase, resulting in tumor malignancies. Meanwhile, mutations that occurred around or within the PDK1 degron, by either blocking SPOP to bind the degron or inhibiting CK1 or GSK3β-mediated PDK1 phosphorylation, could markedly evade SPOP-mediated PDK1 degradation, and played potently oncogenic roles via activating the AKT kinase. Conclusions Our results not only reveal a physiological regulation of PDK1 by E3 ligase SPOP, but also highlight the oncogenic roles of loss-of-function mutations of SPOP or gain-of-function mutations of PDK1 in tumorigenesis through activating the AKT kinase. Supplementary Information The online version contains supplementary material available at 10.1186/s12943-021-01397-5.
Collapse
Affiliation(s)
- Qiwei Jiang
- Institute of Precision Medicine, the First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510275, Guangdong, China
| | - Nana Zheng
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Lang Bu
- Institute of Precision Medicine, the First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510275, Guangdong, China
| | - Xiaomei Zhang
- Institute of Precision Medicine, the First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510275, Guangdong, China
| | - Xiaoling Zhang
- Key Laboratory of Organ Regeneration and Transplantation of the Ministry of Education, Institute of Immunology, The First Hospital, Jilin University, Jilin, Changchun, China.,National-Local Joint Engineering Laboratory of Animal Models for Human Diseases, Jilin, Changchun, China
| | - Yuanzhong Wu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University Cancer Center, Guangzhou, 510060, Guangdong, China
| | - Yaqing Su
- Institute of Precision Medicine, the First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510275, Guangdong, China
| | - Lei Wang
- Institute of Precision Medicine, the First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510275, Guangdong, China
| | - Xiaomin Zhang
- Department of Urology, Shanghai Changhai Hospital, Shanghai, 200433, China
| | - Shancheng Ren
- Department of Urology, Shanghai Changhai Hospital, Shanghai, 200433, China
| | - Xiangpeng Dai
- Key Laboratory of Organ Regeneration and Transplantation of the Ministry of Education, Institute of Immunology, The First Hospital, Jilin University, Jilin, Changchun, China.,National-Local Joint Engineering Laboratory of Animal Models for Human Diseases, Jilin, Changchun, China
| | - Depei Wu
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Wei Xie
- Institute of Precision Medicine, the First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510275, Guangdong, China
| | - Wenyi Wei
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, 02215, USA.
| | - Yasheng Zhu
- Department of Urology, Shanghai Changhai Hospital, Shanghai, 200433, China.
| | - Jianping Guo
- Institute of Precision Medicine, the First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510275, Guangdong, China.
| |
Collapse
|
21
|
Kong W, Tan S, Zhao Q, Lin DL, Xu ZH, Friml J, Xue HW. mRNA surveillance complex PELOTA-HBS1 regulates phosphoinositide-dependent protein kinase1 and plant growth. PLANT PHYSIOLOGY 2021; 186:2003-2020. [PMID: 33930167 PMCID: PMC8331137 DOI: 10.1093/plphys/kiab199] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 04/15/2021] [Indexed: 05/06/2023]
Abstract
The quality control system for messenger RNA (mRNA) is fundamental for cellular activities in eukaryotes. To elucidate the molecular mechanism of 3'-phosphoinositide-dependent protein kinase1 (PDK1), a master regulator that is essential throughout eukaryotic growth and development, we employed a forward genetic approach to screen for suppressors of the loss-of-function T-DNA insertion double mutant pdk1.1 pdk1.2 in Arabidopsis thaliana. Notably, the severe growth attenuation of pdk1.1 pdk1.2 was rescued by sop21 (suppressor of pdk1.1 pdk1.2), which harbors a loss-of-function mutation in PELOTA1 (PEL1). PEL1 is a homolog of mammalian PELOTA and yeast (Saccharomyces cerevisiae) DOM34p, which each form a heterodimeric complex with the GTPase HBS1 (HSP70 SUBFAMILY B SUPPRESSOR1, also called SUPERKILLER PROTEIN7, SKI7), a protein that is responsible for ribosomal rescue and thereby assures the quality and fidelity of mRNA molecules during translation. Genetic analysis further revealed that a dysfunctional PEL1-HBS1 complex failed to degrade the T-DNA-disrupted PDK1 transcripts, which were truncated but functional, and thus rescued the growth and developmental defects of pdk1.1 pdk1.2. Our studies demonstrated the functionality of a homologous PELOTA-HBS1 complex and identified its essential regulatory role in plants, providing insights into the mechanism of mRNA quality control.
Collapse
Affiliation(s)
- Wei Kong
- National Key Laboratory of Plant Molecular Genetics, CAS Centre for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Shutang Tan
- School of Life Sciences, Division of Life Sciences and Medicine, and Division of Molecular & Cell Biophysics, Hefei National Science Centre for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230027, China
- Institute of Science and Technology Austria (IST Austria), Am Campus 1, Klosterneuburg, 3400, Austria
| | - Qing Zhao
- National Key Laboratory of Plant Molecular Genetics, CAS Centre for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 200032, China
| | - De-Li Lin
- Joint Centre for Single Cell Biology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Zhi-Hong Xu
- National Key Laboratory of Plant Molecular Genetics, CAS Centre for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Jiří Friml
- Institute of Science and Technology Austria (IST Austria), Am Campus 1, Klosterneuburg, 3400, Austria
| | - Hong-Wei Xue
- Joint Centre for Single Cell Biology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China
- Author for communication:
| |
Collapse
|
22
|
Song F, Cai A, Ye Q, Chen X, Lin L, Hao X. MiR-34b-3p Impaired HUVECs Viability and Migration via Targeting PDK1 in an In Vitro Model of Gestational Diabetes Mellitus. Biochem Genet 2021; 59:1381-1395. [PMID: 33856598 DOI: 10.1007/s10528-021-10064-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Accepted: 03/25/2021] [Indexed: 12/28/2022]
Abstract
Gestational diabetes mellitus (GDM) leads to poor pregnancy outcomes. The methods for GDM early diagnosis and treatment are still unknown. This study aimed to investigate the expression and diagnostic potential of miR-34b-3p in GDM patients and further analyzed the effects of miR-34b-3p on HUVECs viability and migration. The expression of miR-34b-3p was detected in HUVECs of GDM and normal pregnant women by qRT-PCR. Then the HUVECs were isolated from normal pregnant women. High glucose (HG) was used to treat the HUVECs to mimic the GDM in vitro. The cell viability and migration were determined by MTT, wound healing assay, and transwell assay. The interaction between miR-34b-3p and PDK1 was evaluated by luciferase activity assay. Our results showed that miR-34b-3p was up-regulated in HUVECs of GDM patients. Then the HUVECs were isolated from normal pregnant women and they were treated with HG to mimic the GDM in vitro. Interestingly, knockdown of miR-34b-3p restored the impairment of HG treatment-induced effects in HUVECs. More importantly, PDK1 was proved to be a potential target of miR-34b-3p. Finally, the rescue experiments confirmed that miR-34b-3p impaired cell viability and migration ability in HUVECs by targeting PDK1. These findings concluded that miR-34b-3p impaired HUVECs viability and migration in GDM by targeting PDK1, which might provide a novel perspective for the pathogenesis and underlying therapeutic target for GDM.
Collapse
Affiliation(s)
- Feiluan Song
- Department of Obstetrics and Gynecology, Ruian People's Hospital, No. 108 Wansong Road, Yuhai Street, Ruian City, Wenzhou City, 325200, Zhejiang Province, China
| | - Anli Cai
- Department of Obstetrics and Gynecology, Ruian People's Hospital, No. 108 Wansong Road, Yuhai Street, Ruian City, Wenzhou City, 325200, Zhejiang Province, China.
| | - Qianwen Ye
- Department of Obstetrics and Gynecology, Ruian People's Hospital, No. 108 Wansong Road, Yuhai Street, Ruian City, Wenzhou City, 325200, Zhejiang Province, China
| | - Xiang Chen
- Department of Obstetrics and Gynecology, Ruian People's Hospital, No. 108 Wansong Road, Yuhai Street, Ruian City, Wenzhou City, 325200, Zhejiang Province, China
| | - Lin Lin
- Department of Obstetrics and Gynecology, Ruian People's Hospital, No. 108 Wansong Road, Yuhai Street, Ruian City, Wenzhou City, 325200, Zhejiang Province, China
| | - Xi Hao
- Department of Obstetrics and Gynecology, Ruian People's Hospital, No. 108 Wansong Road, Yuhai Street, Ruian City, Wenzhou City, 325200, Zhejiang Province, China
| |
Collapse
|
23
|
Tang Q, Xu Q, Ding C, Zhang H, Ling Y, Wu C, Fang M. HIF-1 regulates energy metabolism of the Tibetan chicken brain during embryo development under hypoxia. Am J Physiol Regul Integr Comp Physiol 2021; 320:R704-R713. [PMID: 33596720 DOI: 10.1152/ajpregu.00052.2020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The Tibetan chicken (Gallus gallus; TBC) is an indigenous breed found in the Qinghai-Tibet Plateau that are well adapted to a hypoxic environment. The energy metabolism of embryonic brains in TBCs under hypoxia has been little reported. This study investigated changes in energy metabolism of the TBC brain during embryo development under hypoxia. We found that TBCs exhibited a change of glycolysis and the tricarboxylic acid cycle during embryo development under hypoxia. Hypoxia-inducible factor (HIF)-1 was potentially involved in this by directly inducing overexpression of pyruvate dehydrogenase kinase 1 (PDK1) and the glycolytic genes hexokinase 1 (HK1) and lactate dehydrogenase A (LDHA) to increase glycolysis of TBCs to adapt to hypoxia. Although these may not be unique to TBCs, as we had also found similar results in Dwarf Laying Chickens, a lowland chicken breed, TBCs had a stronger regulating ability. In summary, our study revealed that HIF-1 induced energy metabolism changes in the TBC brain via upregulating expressions of PDK1 and other HIF-1 target genes like HK1 and LDHA to increase glycolysis for TBC hypoxic adaptations during embryo development. It indicates the potential application of TBC energy metabolism research for other animals living on the Qinghai-Tibet Plateau.
Collapse
Affiliation(s)
- Qiguo Tang
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Qinqin Xu
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Cui Ding
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Hao Zhang
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Yao Ling
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Changxin Wu
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Meiying Fang
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| |
Collapse
|
24
|
Sun Z, Yao Y, You M, Liu J, Guo W, Qi Z, Wang Z, Wang F, Yuan W, Yu S. The kinase PDK1 is critical for promoting T follicular helper cell differentiation. eLife 2021; 10:61406. [PMID: 33595435 PMCID: PMC7889074 DOI: 10.7554/elife.61406] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 02/08/2021] [Indexed: 01/03/2023] Open
Abstract
The kinase PDK1 is a crucial regulator for immune cell development by connecting PI3K to downstream AKT signaling. However, the roles of PDK1 in CD4+ T cell differentiation, especially in T follicular helper (Tfh) cell, remain obscure. Here we reported PDK1 intrinsically promotes the Tfh cell differentiation and germinal center responses upon acute infection by using conditional knockout mice. PDK1 deficiency in T cells caused severe defects in both early differentiation and late maintenance of Tfh cells. The expression of key Tfh regulators was remarkably downregulated in PDK1-deficient Tfh cells, including Tcf7, Bcl6, Icos, and Cxcr5. Mechanistically, ablation of PDK1 led to impaired phosphorylation of AKT and defective activation of mTORC1, resulting in substantially reduced expression of Hif1α and p-STAT3. Meanwhile, decreased p-AKT also suppresses mTORC2-associated GSK3β activity in PDK1-deficient Tfh cells. These integrated effects contributed to the dramatical reduced expression of TCF1 and ultimately impaired the Tfh cell differentiation.
Collapse
Affiliation(s)
- Zhen Sun
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Yingpeng Yao
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Menghao You
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Jingjing Liu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Wenhui Guo
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Zhihong Qi
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Zhao Wang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Fang Wang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Weiping Yuan
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, and Center for Stem Cell Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Shuyang Yu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| |
Collapse
|
25
|
Wang H, Liu M, Zou G, Wang L, Duan W, He X, Ji M, Zou X, Hu Y, Yang J, Chen G. Deletion of PDK1 in oligodendrocyte lineage cells causes white matter abnormality and myelination defect in the central nervous system. Neurobiol Dis 2020; 148:105212. [PMID: 33276084 DOI: 10.1016/j.nbd.2020.105212] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 11/17/2020] [Accepted: 11/29/2020] [Indexed: 12/01/2022] Open
Abstract
PDK1 (3-Phosphoinositide dependent protein kinase-1) is a member in the PI3K (phosphatidylinositol 3 kinase) pathway and is implicated in neurodevelopmental disease with microcephaly. Although the role of PDK1 in neurogenesis has been broadly studied, it remains unknown how PDK1 may regulate oligogenesis in the central nervous system (CNS). To address this question, we generated oligodendrocyte (OL) lineage cells specific PDK1 conditional knockout (cKO) mice. We find that PDK1 cKOs display abnormal white matter (WM), massive loss of mature OLs and severe defect in myelination in the CNS. In contrast, these mutants exhibit normal neuronal development and unchanged apoptosis in the CNS. We demonstrate that deletion of PDK1 severely impairs OL differentiation. We show that genetic or pharmacological inhibition of PDK1 causes deficit in the mammalian target of rapamycin (mTor) signaling and down-regulation of Sox10. Together, these results highlight a critical role of PDK1 in OL differentiation during postnatal CNS development.
Collapse
Affiliation(s)
- He Wang
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, No. 1 East Jianshe Road, Zhengzhou 450052, China
| | - Mengjia Liu
- State Key Laboratory of Pharmaceutical Biotechnology, MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Nanjing University, 12 Xuefu Avenue, Nanjing, Jiangsu Province 210061, China
| | - Gang Zou
- Department of Anesthesiology, The Second Affiliated Hospital, Nanjing Medical University, 121 Jiangjiayuan Avenue, Nanjing, Jiangsu Province 210003, China
| | - Long Wang
- State Key Laboratory of Pharmaceutical Biotechnology, MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Nanjing University, 12 Xuefu Avenue, Nanjing, Jiangsu Province 210061, China
| | - Wenbin Duan
- Department of General Surgery, The Second Clinical Medical College, Shenzhen People's Hospital, Jinan University, Shenzhen 518000, China
| | - Xue He
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, No. 1 East Jianshe Road, Zhengzhou 450052, China
| | - Muhuo Ji
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, No. 1 East Jianshe Road, Zhengzhou 450052, China
| | - Xiaochuan Zou
- State Key Laboratory of Pharmaceutical Biotechnology, MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Nanjing University, 12 Xuefu Avenue, Nanjing, Jiangsu Province 210061, China
| | - Yimin Hu
- Department of General Surgery, The Second Clinical Medical College, Shenzhen People's Hospital, Jinan University, Shenzhen 518000, China.
| | - Jianjun Yang
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, No. 1 East Jianshe Road, Zhengzhou 450052, China.
| | - Guiquan Chen
- State Key Laboratory of Pharmaceutical Biotechnology, MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Nanjing University, 12 Xuefu Avenue, Nanjing, Jiangsu Province 210061, China.
| |
Collapse
|
26
|
Kim H, Cho SC, Jeong HJ, Lee HY, Jeong MH, Pyun JH, Ryu D, Kim M, Lee YS, Kim MS, Park SC, Lee YI, Kang JS. Indoprofen prevents muscle wasting in aged mice through activation of PDK1/AKT pathway. J Cachexia Sarcopenia Muscle 2020; 11:1070-1088. [PMID: 32096917 PMCID: PMC7432593 DOI: 10.1002/jcsm.12558] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 01/15/2020] [Accepted: 01/30/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Muscle wasting, resulting from aging or pathological conditions, leads to reduced quality of life, increased morbidity, and increased mortality. Much research effort has been focused on the development of exercise mimetics to prevent muscle atrophy and weakness. In this study, we identified indoprofen from a screen for peroxisome proliferator-activated receptor γ coactivator α (PGC-1α) inducers and report its potential as a drug for muscle wasting. METHODS The effects of indoprofen treatment on dexamethasone-induced atrophy in mice and in 3-phosphoinositide-dependent protein kinase-1 (PDK1)-deleted C2C12 myotubes were evaluated by immunoblotting to determine the expression levels of myosin heavy chain and anabolic-related and oxidative metabolism-related proteins. Young, old, and disuse-induced muscle atrophic mice were administered indoprofen (2 mg/kg body weight) by gavage. Body weight, muscle weight, grip strength, isometric force, and muscle histology were assessed. The expression levels of muscle mass-related and function-related proteins were analysed by immunoblotting or immunostaining. RESULTS In young (3-month-old) and aged (22-month-old) mice, indoprofen treatment activated oxidative metabolism-related enzymes and led to increased muscle mass. Mechanistic analysis using animal models and muscle cells revealed that indoprofen treatment induced the sequential activation of AKT/p70S6 kinase (S6K) and AMP-activated protein kinase (AMPK), which in turn can augment protein synthesis and PGC-1α induction, respectively. Structural prediction analysis identified PDK1 as a target of indoprofen and, indeed, short-term treatment with indoprofen activated the PDK1/AKT/S6K pathway in muscle cells. Consistent with this finding, PDK1 inhibition abrogated indoprofen-induced AKT/S6K activation and hypertrophic response. CONCLUSIONS Our findings demonstrate the effects of indoprofen in boosting skeletal muscle mass through the sequential activation of PDK1/AKT/S6K and AMPK/PGC-1α. Taken together, our results suggest that indoprofen represents a potential drug to prevent muscle wasting and weakness related to aging or muscle diseases.
Collapse
Affiliation(s)
- Hyebeen Kim
- Department of Molecular Cell Biology, Single Cell Network Research Center, Sungkyunkwan University, Suwon, South Korea
| | - Sung Chun Cho
- Well Aging Research Center, Division of Biotechnology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, South Korea
| | - Hyeon-Ju Jeong
- Department of Molecular Cell Biology, Single Cell Network Research Center, Sungkyunkwan University, Suwon, South Korea
| | - Hye-Young Lee
- Department of Molecular Cell Biology, Single Cell Network Research Center, Sungkyunkwan University, Suwon, South Korea
| | - Myong-Ho Jeong
- Department of Molecular Cell Biology, Single Cell Network Research Center, Sungkyunkwan University, Suwon, South Korea
| | - Jung-Hoon Pyun
- Department of Molecular Cell Biology, Single Cell Network Research Center, Sungkyunkwan University, Suwon, South Korea
| | - Dongryeol Ryu
- Department of Molecular Cell Biology, Single Cell Network Research Center, Sungkyunkwan University, Suwon, South Korea.,Samsung Biomedical Research Institute, Samsung Medical Center, Seoul, South Korea
| | - MinSeok Kim
- School of Undergraduate Studies, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, South Korea
| | - Young-Sam Lee
- Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, South Korea
| | - Minseok S Kim
- Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, South Korea
| | - Sang Chul Park
- Well Aging Research Center, Division of Biotechnology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, South Korea
| | - Yun-Il Lee
- Well Aging Research Center, Division of Biotechnology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, South Korea
| | - Jong-Sun Kang
- Department of Molecular Cell Biology, Single Cell Network Research Center, Sungkyunkwan University, Suwon, South Korea.,Samsung Biomedical Research Institute, Samsung Medical Center, Seoul, South Korea
| |
Collapse
|
27
|
PDK1 Regulates the Maintenance of Cell Body and the Development of Dendrites of Purkinje Cells by pS6 and PKCγ. J Neurosci 2020; 40:5531-5548. [PMID: 32487697 DOI: 10.1523/jneurosci.2496-19.2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 05/20/2020] [Accepted: 05/21/2020] [Indexed: 01/09/2023] Open
Abstract
3-Phosphoinositide-dependent protein kinase-1 (PDK1) plays a critical role in the development of mammalian brain. Here, we investigated the role of PDK1 in Purkinje cells (PCs) by generating the PDK1-conditional knock-out mice (cKO) through crossing PV-cre or Pcp2-cre mice with Pdk1fl/fl mice. The male mice were used in the behavioral testing, and the other experiments were performed on mice of both sexes. These PDK1-cKO mice displayed decreased cerebellar size and impaired motor balance and coordination. By the electrophysiological recording, we observed the reduced spontaneous firing of PCs from the cerebellar slices of the PDK1-cKO mice. Moreover, the cell body size of PCs in the PDK1-cKO mice was time dependently reduced compared with that in the control mice. And the morphologic complexity of PCs was also decreased after PDK1 deletion. These effects may have contributed to the reduction of the rpS6 (reduced ribosomal protein S6) phosphorylation and the PKCγ expression in PDK1-cKO mice since the upregulation of pS6 by treatment of 3-benzyl-5-((2-nitrophenoxy) methyl)-dihydrofuran-2(3H)-1, the agonist of mTOR1, partly rescued the reduction in the cell body size of the PCs, and the delivery of recombinant adeno-associated virus-PKCγ through cerebellar injection rescued the reduced complexity of the dendritic arbor in PDK1-cKO mice. Together, our data suggest that PDK1, by regulating rpS6 phosphorylation and PKCγ expression, controls the cell body maintenance and the dendritic development in PCs and is critical for cerebellar motor coordination.SIGNIFICANCE STATEMENT Here, we show the role of 3-phosphoinositide-dependent protein kinase-1 (PDK1) in Purkinje cells (PCs). The ablation of PDK1 in PCs resulted in a reduction of cell body size, and dendritic complexity and abnormal spontaneous firing, which attributes to the motor defects in PDK1-conditional knock-out (cKO) mice. Moreover, the ribosomal protein S6 (rpS6) phosphorylation and the expression of PKCγ are downregulated after the ablation of PDK1. Additionally, upregulation of rpS6 phosphorylation by3-benzyl-5-((2-nitrophenoxy) methyl)-dihydrofuran-2(3H)-1 partly rescued the reduction in cell body size of PCs, and the overexpression of PKCγ in PDK1-KO PCs rescued the reduction in the dendritic complexity. These findings indicate that PDK1 contributes to the maintenance of the cell body and the dendritic development of PCs by regulating rpS6 phosphorylation and PKCγ expression.
Collapse
|
28
|
Wei Y, Han X, Zhao C. PDK1 regulates the survival of the developing cortical interneurons. Mol Brain 2020; 13:65. [PMID: 32366272 PMCID: PMC7197138 DOI: 10.1186/s13041-020-00604-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Accepted: 04/22/2020] [Indexed: 01/08/2023] Open
Abstract
Inhibitory interneurons are critical for maintaining the excitatory/inhibitory balance. During the development cortical interneurons originate from the ganglionic eminence and arrive at the dorsal cortex through two tangential migration routes. However, the mechanisms underlying the development of cortical interneurons remain unclear. 3-Phosphoinositide-dependent protein kinase-1 (PDK1) has been shown to be involved in a variety of biological processes, including cell proliferation and migration, and plays an important role in the neurogenesis of cortical excitatory neurons. However, the function of PDK1 in interneurons is still unclear. Here, we reported that the disruption of Pdk1 in the subpallium achieved by crossing the Dlx5/6-Cre-IRES-EGFP line with Pdk1fl/fl mice led to the severely increased apoptosis of immature interneurons, subsequently resulting in a remarkable reduction in cortical interneurons. However, the tangential migration, progenitor pools and cell proliferation were not affected by the disruption of Pdk1. We further found the activity of AKT-GSK3β signaling pathway was decreased after Pdk1 deletion, suggesting it might be involved in the regulation of the survival of cortical interneurons. These results provide new insights into the function of PDK1 in the development of the telencephalon.
Collapse
Affiliation(s)
- Yongjie Wei
- Key Laboratory of Developmental Genes and Human Diseases, MOE, School of Medicine, Southeast University, Nanjing, 210009, China
| | - Xiaoning Han
- Key Laboratory of Developmental Genes and Human Diseases, MOE, School of Medicine, Southeast University, Nanjing, 210009, China
| | - Chunjie Zhao
- Key Laboratory of Developmental Genes and Human Diseases, MOE, School of Medicine, Southeast University, Nanjing, 210009, China.
| |
Collapse
|
29
|
Xiao Y, Offringa R. PDK1 regulates auxin transport and Arabidopsis vascular development through AGC1 kinase PAX. NATURE PLANTS 2020; 6:544-555. [PMID: 32393878 DOI: 10.1038/s41477-020-0650-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 03/25/2020] [Indexed: 06/11/2023]
Abstract
The 3-phosphoinositide-dependent protein kinase 1 (PDK1) is a conserved master regulator of AGC kinases in eukaryotic organisms. pdk1 loss of function causes a lethal phenotype in animals and yeasts, but only mild phenotypic defects in Arabidopsis thaliana (Arabidopsis). The Arabidopsis genome contains two PDK1-encoding genes, PDK1 and PDK2. Here, we used clustered regularly interspaced short palindromic repeat (CRISPR)/CRISPR-associated protein 9 (Cas9) to generate true loss-of-function pdk1 alleles, which, when combined with pdk2 alleles, showed severe developmental defects including fused cotyledons, a short primary root, dwarf stature and defects in male fertility. We obtained evidence that PDK1 is responsible for AGC1 kinase PROTEIN KINASE ASSOCIATED WITH BRX (PAX) activation by phosphorylation during vascular development, and that the PDK1 phospholipid-binding Pleckstrin Homology domain is not required for this process. Our data indicate that PDK1 regulates polar auxin transport by activating AGC1 clade kinases, resulting in PIN phosphorylation.
Collapse
Affiliation(s)
- Yao Xiao
- Plant Developmental Genetics, Institute of Biology Leiden, Leiden University, Leiden, the Netherlands
- Plant Systems Biology, TUM School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
| | - Remko Offringa
- Plant Developmental Genetics, Institute of Biology Leiden, Leiden University, Leiden, the Netherlands.
| |
Collapse
|
30
|
Tan S, Zhang X, Kong W, Yang XL, Molnár G, Vondráková Z, Filepová R, Petrášek J, Friml J, Xue HW. The lipid code-dependent phosphoswitch PDK1-D6PK activates PIN-mediated auxin efflux in Arabidopsis. NATURE PLANTS 2020; 6:556-569. [PMID: 32393881 DOI: 10.1038/s41477-020-0648-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Accepted: 03/25/2020] [Indexed: 06/11/2023]
Abstract
Directional intercellular transport of the phytohormone auxin mediated by PIN-FORMED (PIN) efflux carriers has essential roles in both coordinating patterning processes and integrating multiple external cues by rapidly redirecting auxin fluxes. PIN activity is therefore regulated by multiple internal and external cues, for which the underlying molecular mechanisms are not fully elucidated. Here, we demonstrate that 3'-PHOSPHOINOSITIDE-DEPENDENT PROTEIN KINASE1 (PDK1), which is conserved in plants and mammals, functions as a molecular hub that perceives upstream lipid signalling and modulates downstream substrate activity through phosphorylation. Using genetic analysis, we show that the loss-of-function Arabidopsis pdk1.1 pdk1.2 mutant exhibits a plethora of abnormalities in organogenesis and growth due to defective polar auxin transport. Further cellular and biochemical analyses reveal that PDK1 phosphorylates D6 protein kinase, a well-known upstream activator of PIN proteins. We uncover a lipid-dependent phosphorylation cascade that connects membrane-composition-based cellular signalling with plant growth and patterning by regulating morphogenetic auxin fluxes.
Collapse
Affiliation(s)
- Shutang Tan
- Institute of Science and Technology Austria (IST Austria), Klosterneuburg, Austria
| | - Xixi Zhang
- Institute of Science and Technology Austria (IST Austria), Klosterneuburg, Austria
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | - Wei Kong
- National Key Laboratory of Plant Molecular Genetics, CAS Centre for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
| | - Xiao-Li Yang
- National Key Laboratory of Plant Molecular Genetics, CAS Centre for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
| | - Gergely Molnár
- Institute of Science and Technology Austria (IST Austria), Klosterneuburg, Austria
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | - Zuzana Vondráková
- Institute of Experimental Botany, The Czech Academy of Sciences, Prague, Czech Republic
| | - Roberta Filepová
- Institute of Experimental Botany, The Czech Academy of Sciences, Prague, Czech Republic
| | - Jan Petrášek
- Institute of Experimental Botany, The Czech Academy of Sciences, Prague, Czech Republic
| | - Jiří Friml
- Institute of Science and Technology Austria (IST Austria), Klosterneuburg, Austria.
| | - Hong-Wei Xue
- National Key Laboratory of Plant Molecular Genetics, CAS Centre for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China.
- Joint Center for Single Cell Biology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China.
| |
Collapse
|
31
|
Chan TO, Armen RS, Yadav S, Shah S, Zhang J, Tiegs BC, Keny N, Blumhof B, Deshpande DA, Rodeck U, Penn RB. A tripartite cooperative mechanism confers resistance of the protein kinase A catalytic subunit to dephosphorylation. J Biol Chem 2020; 295:3316-3329. [PMID: 31964716 DOI: 10.1074/jbc.ra119.010004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 12/28/2019] [Indexed: 11/06/2022] Open
Abstract
Phosphorylation of specific residues in the activation loops of AGC kinase group (protein kinase A, G, and C families) is required for activity of most of these kinases, including the catalytic subunit of PKA (PKAc). Although many phosphorylated AGC kinases are sensitive to phosphatase-mediated dephosphorylation, the PKAc activation loop uniquely resists dephosphorylation, rendering it "constitutively" phosphorylated in cells. Previous biophysical experiments and structural modeling have suggested that the N-terminal myristoylation signal and the C-terminal FXXF motif in PKAc regulate its thermal stability and catalysis. Here, using site-directed mutagenesis, molecular modeling, and in cell-free and cell-based systems, we demonstrate that substitutions of either the PKAc myristoylation signal or the FXXF motif only modestly reduce phosphorylation and fail to affect PKAc function in cells. However, we observed that these two sites cooperate with an N-terminal FXXW motif to cooperatively establish phosphatase resistance of PKAc while not affecting kinase-dependent phosphorylation of the activation loop. We noted that this tripartite cooperative mechanism of phosphatase resistance is functionally relevant, as demonstrated by changes in morphology, adhesion, and migration of human airway smooth muscle cells transfected with PKAc variants containing amino acid substitutions in these three sites. These findings establish that three allosteric sites located at the PKAc N and C termini coordinately regulate the phosphatase sensitivity of this enzyme. This cooperative mechanism of phosphatase resistance of AGC kinase opens new perspectives toward therapeutic manipulation of kinase signaling in disease.
Collapse
Affiliation(s)
- Tung O Chan
- Center for Translational Medicine and Korman Respiratory Institute, Department of Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania 19107; Sydney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania 19107.
| | - Roger S Armen
- Department of Pharmaceutical Sciences, College of Pharmacy, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
| | - Santosh Yadav
- Center for Translational Medicine and Korman Respiratory Institute, Department of Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
| | - Sushrut Shah
- Center for Translational Medicine and Korman Respiratory Institute, Department of Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
| | - Jin Zhang
- Center for Translational Medicine and Korman Respiratory Institute, Department of Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
| | - Brian C Tiegs
- Center for Translational Medicine and Korman Respiratory Institute, Department of Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
| | - Nikhil Keny
- Center for Translational Medicine and Korman Respiratory Institute, Department of Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
| | - Brian Blumhof
- Center for Translational Medicine and Korman Respiratory Institute, Department of Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
| | - Deepak A Deshpande
- Center for Translational Medicine and Korman Respiratory Institute, Department of Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
| | - Ulrich Rodeck
- Sydney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania 19107; Department of Dermatology and Cutaneous Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
| | - Raymond B Penn
- Center for Translational Medicine and Korman Respiratory Institute, Department of Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
| |
Collapse
|
32
|
Xiao D, Zhou Q, Gao Y, Cao B, Zhang Q, Zeng G, Zong S. PDK1 is important lipid kinase for RANKL-induced osteoclast formation and function via the regulation of the Akt-GSK3β-NFATc1 signaling cascade. J Cell Biochem 2020; 121:4542-4557. [PMID: 32048762 DOI: 10.1002/jcb.29677] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 01/16/2020] [Indexed: 12/17/2022]
Abstract
Perturbations in the balanced process of osteoblast-mediated bone formation and osteoclast-mediated bone resorption leading to excessive osteoclast formation and/or activity is the cause of many pathological bone conditions such as osteoporosis. The osteoclast is the only cell in the body capable of resorbing and degrading the mineralized bone matrix. Osteoclast formation from monocytic precursors is governed by the actions of two key cytokines macrophage-colony-stimulating factor and receptor activator of nuclear factor-κB ligand (RANKL). Binding of RANKL binding to receptor RANK initiates a series of downstream signaling responses leading to monocytic cell differentiation and fusion, and subsequent mature osteoclast bone resorption and survival. The phosphoinositide-3-kinase (PI3K)-protein kinase B (Akt) signaling cascade is one such pathway activated in response to RANKL. The 3-phosphoinositide-dependent protein kinase 1 (PDK1), is considered the master upstream lipid kinase of the PI3K-Akt cascade. PDK1 functions to phosphorylate and partially activate Akt, triggering the activation of downstream effectors. However, the role of PDK1 in osteoclasts has yet to be clearly defined. In this study, we specifically deleted the PDK1 gene in osteoclasts using the cathepsin-K promoter driven Cre-LoxP system. We found that the specific genetic ablation of PDK1 in osteoclasts leads to an osteoclast-poor osteopetrotic phenotype in mice. In vitro cellular assays further confirmed the impairment of osteoclast formation in response to RANKL by PDK1-deficient bone marrow macrophage (BMM) precursor cells. PDK1-deficient BMMs exhibited reduced ability to reorganize actin cytoskeleton to form a podosomal actin belt as a result of diminished capacity to fuse into giant multinucleated osteoclasts. Notably, biochemical analyses showed that PDK1 deficiency attenuated the phosphorylation of Akt and downstream effector GSK3β, and reduced induction of NFATc1. GSK3β is a reported negative regulator of NFATc1. GSK3β activity is inhibited by Akt-dependent phosphorylation. Thus, our data provide clear genetic and mechanistic insights into the important role for PDK1 in osteoclasts.
Collapse
Affiliation(s)
- Dongliang Xiao
- Department of Spine Osteopathia, The First Affiliated Hospital of Guangxi Medical University, Guangxi Medical University, Nanning, Guangxi, China
| | - Quan Zhou
- Collaborative Innovation Center of Guangxi Biological Medicine, Guangxi Medical University, Nanning, Guangxi, China
| | - Yunbing Gao
- Department of Spine Osteopathia, The First Affiliated Hospital of Guangxi Medical University, Guangxi Medical University, Nanning, Guangxi, China
| | - Baichuan Cao
- Department of Spine Osteopathia, The First Affiliated Hospital of Guangxi Medical University, Guangxi Medical University, Nanning, Guangxi, China
| | - Qiong Zhang
- College of Public Hygiene of Guangxi Medical University, Guangxi, China
| | - Gaofeng Zeng
- College of Public Hygiene of Guangxi Medical University, Guangxi, China
| | - Shaohui Zong
- Department of Spine Osteopathia, The First Affiliated Hospital of Guangxi Medical University, Guangxi Medical University, Nanning, Guangxi, China.,Research Centre for Regenerative Medicine and Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi, China
| |
Collapse
|
33
|
Pivotal role of PDK1 in megakaryocyte cytoskeletal dynamics and polarization during platelet biogenesis. Blood 2019; 134:1847-1858. [DOI: 10.1182/blood.2019000185] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 08/20/2019] [Indexed: 12/31/2022] Open
Abstract
The investigators explore the role of PDK1 (phosphoinositide-dependent protein kinase 1) in the cytoskeletal regulation of platelet production and furnish new insights into megakaryocyte maturation and proplatelet formation.
Collapse
|
34
|
Han X, Wei Y, Wu X, Gao J, Yang Z, Zhao C. PDK1 Regulates Transition Period of Apical Progenitors to Basal Progenitors by Controlling Asymmetric Cell Division. Cereb Cortex 2019; 30:406-420. [DOI: 10.1093/cercor/bhz146] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 06/09/2019] [Accepted: 06/09/2019] [Indexed: 12/18/2022] Open
Abstract
Abstract
The six-layered neocortex consists of diverse neuron subtypes. Deeper-layer neurons originate from apical progenitors (APs), while upper-layer neurons are mainly produced by basal progenitors (BPs), which are derivatives of APs. As development proceeds, an AP generates two daughter cells that comprise an AP and a deeper-layer neuron or a BP. How the transition of APs to BPs is spatiotemporally regulated is a fundamental question. Here, we report that conditional deletion of phoshpoinositide-dependent protein kinase 1 (PDK1) in mouse developing cortex achieved by crossing Emx1Cre line with Pdk1fl/fl leads to a delayed transition of APs to BPs and subsequently causes an increased output of deeper-layer neurons. We demonstrate that PDK1 is involved in the modulation of the aPKC-Par3 complex and further regulates the asymmetric cell division (ACD). We also find Hes1, a downstream effecter of Notch signal pathway is obviously upregulated. Knockdown of Hes1 or treatment with Notch signal inhibitor DAPT recovers the ACD defect in the Pdk1 cKO. Thus, we have identified a novel function of PDK1 in controlling the transition of APs to BPs.
Collapse
Affiliation(s)
- Xiaoning Han
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing 210009, China
| | - Yongjie Wei
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing 210009, China
| | - Xiaojing Wu
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing 210009, China
| | - Jun Gao
- Department of Neurobiology
- Key Laboratory of Human Functional Genomics of Jiangsu, Nanjing Medical University, Nanjing 211166, China
| | - Zhongzhou Yang
- State Key Laboratory of Pharmaceutical Biotechnology
- Ministry of Education Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Nanjing Biomedical Research Institute, Nanjing University, Nanjing 210061, China
| | - Chunjie Zhao
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing 210009, China
| |
Collapse
|
35
|
Pan W, Li W, Zhao J, Huang Z, Zhao J, Chen S, Wang C, Xue Y, Huang F, Fang Q, Wang J, Brand D, Zheng SG. lncRNA-PDPK2P promotes hepatocellular carcinoma progression through the PDK1/AKT/Caspase 3 pathway. Mol Oncol 2019; 13:2246-2258. [PMID: 31368655 PMCID: PMC6763783 DOI: 10.1002/1878-0261.12553] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 04/29/2019] [Accepted: 07/30/2019] [Indexed: 12/14/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is a malignancy with one of the worst prognoses. Long noncoding RNA (lncRNA) are emerging as an important regulator of gene expression and function, leading to the development of cancer. The aim of this study was to determine the relationship between lncRNA and HCC and to further guide clinical therapy. lncRNA in HCC and adjacent tissues were screened, and the correlation between lncRNA-PDPK2P expression in liver tissues and the pathological characteristics and severity of HCC was assessed. The effects of PDPK2P on HCC proliferation, apoptosis, metastasis, and invasion were also systematically investigated via CCK-8 assay, flow cytometry, scratch wound healing, and transwell assay, respectively. The relationship between PDPK2P and PDK1 was verified by RNA pull-down, rescue experiments and western blot. lncRNA-PDPK2P was highly expressed in HCC tissues with a distinct positive correlation between PDPK2P and PDK1, and the upregulation was clinically associated with a larger tumor embolus, low differentiation, and poor survival. Mechanistically, lncRNA-PDPK2P interacted with PDK1 and promoted HCC progression through the PDK1/AKT/caspase 3 signaling pathway. lncRNA-PDPK2P can promote HCC progression, suggesting it may be a clinically valuable biomarker and serve as a molecular target for the diagnosis, prognosis, and therapy of hepatocellular carcinoma.
Collapse
Affiliation(s)
- Weidong Pan
- Department of Hepatobiliary Surgery, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Wen Li
- Department of Hepatobiliary Surgery, the Second Affiliated Hospital of Nanchang University, China
| | - Jun Zhao
- Department of Clinical Immunology, Third Hospital of Sun Yat-sen University, Guangzhou, China
| | - Zhiyi Huang
- Department of Clinical Immunology, Third Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jingyuan Zhao
- Department of Hepatobiliary Surgery, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Shuxian Chen
- Department of Hepatobiliary Surgery, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Chusi Wang
- Department of Hepatobiliary Surgery, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Youqiu Xue
- Department of Clinical Immunology, Third Hospital of Sun Yat-sen University, Guangzhou, China.,Department of Internal Medicine, Ohio State University College of Medicine, Columbus, OH, USA
| | - Feng Huang
- Department of Clinical Immunology, Third Hospital of Sun Yat-sen University, Guangzhou, China
| | - Qiannan Fang
- Department of Clinical Immunology, Third Hospital of Sun Yat-sen University, Guangzhou, China
| | - Julie Wang
- Department of Internal Medicine, Ohio State University College of Medicine, Columbus, OH, USA
| | - David Brand
- Research Service, Memphis VA Medical Center, Memphis, TN, USA
| | - Song Guo Zheng
- Department of Internal Medicine, Ohio State University College of Medicine, Columbus, OH, USA
| |
Collapse
|
36
|
He J, Yu S, Guo C, Tan L, Song X, Wang M, Wu J, Long Y, Gong D, Zhang R, Cao Z, Li Y, Peng C. Polyphyllin I induces autophagy and cell cycle arrest via inhibiting PDK1/Akt/mTOR signal and downregulating cyclin B1 in human gastric carcinoma HGC-27 cells. Biomed Pharmacother 2019; 117:109189. [PMID: 31387191 DOI: 10.1016/j.biopha.2019.109189] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 06/17/2019] [Accepted: 06/28/2019] [Indexed: 12/25/2022] Open
Abstract
Paris polyphylla. is a traditional medicinal herb that has long been used to prevent cancer in many Asian countries. Polyphyllin I (PPI), an important bioactive constituent of Paris polyphylla, has been found to exhibit a wide variety of anticancer activities in many types of cancer cells. However, the effects of PPI on human gastric carcinoma cells and its mechanism of action remain unclear. In this study, we examined the effective anti-gastric carcinoma activity of PPI and its underlying mechanism of action in HGC-27 cells. In vitro, sub-micromolar concentrations of PPI inhibited HGC-27 cell proliferation with an IC50 of 0.34 ± 0.06 μM after a 72-h treatment. In vivo, 3 mg/kg PPI significantly inhibited proliferation of HGC-27 tumor cells, with a 78.8% inhibition rate compared to paclitaxel, and demonstrated higher safety. Analysis of MDC and mGFP-LC3 fluorescence, Western blotting and flow cytometry indicated that PPI induced cell cycle arrest in HGC-27 cells by promoting the conversion of LC3-I to LC3-II and by downregulating cyclin B1. Furthermore, Western blotting showed that PPI inhibited the autophagy-regulating PDK1/Akt/mTOR signaling pathway in vitro and in vivo. In addition, immunohistochemistry and TUNEL staining revealed that PPI decreased Ki67 expression and increased the percentage of apoptotic cells in HGC-27 xenograft tumors. These data indicate that PPI is an PDK1/Akt/mTOR signaling inhibitor and of therapeutic relevance for gastric cancer treatment and that the rhizome of Paris polyphylla deserves further clinical investigation as an alternative therapy for gastric cancer.
Collapse
Affiliation(s)
- Junlin He
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, National Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu 611137, China
| | - Si Yu
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, National Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu 611137, China; Chengdu Medical College, Chengdu 610500, China
| | - Chuanjie Guo
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, National Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu 611137, China
| | - Lu Tan
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, National Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu 611137, China
| | - Xiaominting Song
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, National Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu 611137, China
| | - Miao Wang
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, National Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu 611137, China
| | - Jing Wu
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, National Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu 611137, China
| | - Yuling Long
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, National Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu 611137, China
| | - Daoyin Gong
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, National Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu 611137, China
| | - Ruoqi Zhang
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, National Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu 611137, China
| | - Zhixing Cao
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, National Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu 611137, China
| | - Yuzhi Li
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, National Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu 611137, China.
| | - Cheng Peng
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, National Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu 611137, China.
| |
Collapse
|
37
|
Jin H, Wang H, Li J, Yu S, Xu M, Qiu Z, Xia M, Zhu J, Feng Q, Xie J, Xu B, Yang Z. Differential contribution of the two waves of cardiac progenitors and their derivatives to aorta and pulmonary artery. Dev Biol 2019; 450:82-89. [DOI: 10.1016/j.ydbio.2019.03.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Revised: 03/07/2019] [Accepted: 03/27/2019] [Indexed: 10/27/2022]
|
38
|
Sun XL, Wang L, Yuan WP, Wang WL. [The role of PDK1 in the transition of endothelial to hematopoietic cells]. ZHONGHUA XUE YE XUE ZA ZHI = ZHONGHUA XUEYEXUE ZAZHI 2019; 39:709-716. [PMID: 30369179 PMCID: PMC7342253 DOI: 10.3760/cma.j.issn.0253-2727.2018.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
目的 研究磷酸肌醇依赖性激酶1(PDK1)在内皮细胞向造血细胞转化阶段对造血干细胞(HSC)发生的影响。 方法 应用Vec-Cre在内皮细胞中特异性敲除PDK1基因,取对照组PDK1fl/fl、PDK1fl/+小鼠及敲除组Vec-Cre;PDK1fl/fl小鼠胚胎的主动脉-性腺-中肾区(AGM区)细胞进行集落形成实验,检测PDK1基因对造血祖细胞功能的影响;取对照组和敲除组AGM区细胞行移植实验,检测PDK1对HSC功能的影响;取对照组和敲除组AGM区细胞,通过流式细胞术检测PDK1对能够向造血转化的CD31+c-Kithigh细胞群比例、细胞周期及细胞凋亡的影响;分选对照组和敲除组AGM区CD31+c-Kithigh细胞群,通过Real-time PCR检测PDK1对内皮向造血转换相关的转录因子(RUNX1、P2-RUNX1、GATA2)的影响。 结果 PDK1敲除后,造血祖细胞形成的克隆形态变小,数目减少[敲除组CFU-GM为(24±5)个/ee,对照组为(62±1)个/ee,P=0.001];破坏了造血干细胞重建造血及多向分化的能力(敲除组移植5只,0只重建,对照组移植7只,5只重建,P=0.001);AGM区CD31+c-Kithigh比例降低[敲除组CD31+c-Kithigh比例为(0.145±0.017)%,对照组比例为(0.385±0.04)%,P=0.001];并且AGM区由内皮细胞向造血细胞转换的关键转录因子表达下降,但对CD31+c-Kithigh细胞的增殖和凋亡无明显影响。 结论 在内皮细胞中特异敲除PDK1基因,导致具有向造血转化的内皮细胞群比例降低,影响了HSC的发生,破坏了HSC重建造血的能力。
Collapse
Affiliation(s)
- X L Sun
- Institute of Hematology & Blood Diseases Hospital, CAMS & PUMC, State Key Laboratory of Experimental Hematology, Tianjin 300020, China
| | | | | | - W L Wang
- Institute of Hematology & Blood Diseases Hospital, CAMS & PUMC, State Key Laboratory of Experimental Hematology, Tianjin 300020, China
| |
Collapse
|
39
|
Scholz S, Pleßmann J, Enugutti B, Hüttl R, Wassmer K, Schneitz K. The AGC protein kinase UNICORN controls planar growth by attenuating PDK1 in Arabidopsis thaliana. PLoS Genet 2019; 15:e1007927. [PMID: 30742613 PMCID: PMC6386418 DOI: 10.1371/journal.pgen.1007927] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 02/22/2019] [Accepted: 01/02/2019] [Indexed: 11/19/2022] Open
Abstract
Tissue morphogenesis critically depends on the coordination of cellular growth patterns. In plants, many organs consist of clonally distinct cell layers, such as the epidermis, whose cells undergo divisions that are oriented along the plane of the layer. The developmental control of such planar growth is poorly understood. We have previously identified the Arabidopsis AGCVIII-class protein kinase UNICORN (UCN) as a central regulator of this process. Plants lacking UCN activity show spontaneous formation of ectopic multicellular protrusions in integuments and malformed petals indicating that UCN suppresses uncontrolled growth in those tissues. In the current model UCN regulates planar growth of integuments in part by directly repressing the putative transcription factor ABERRANT TESTA SHAPE (ATS). Here we report on the identification of 3-PHOSPHOINOSITIDE-DEPENDENT PROTEIN KINASE 1 (PDK1) as a novel factor involved in UCN-mediated growth control. PDK1 constitutes a basic component of signaling mediated by AGC protein kinases throughout eukaryotes. Arabidopsis PDK1 is implied in stress responses and growth promotion. Here we show that loss-of-function mutations in PDK1 suppress aberrant growth in integuments and petals of ucn mutants. Additional genetic, in vitro, and cell biological data support the view that UCN functions by repressing PDK1. Furthermore, our data indicate that PDK1 is indirectly required for deregulated growth caused by ATS overexpression. Our findings support a model proposing that UCN suppresses ectopic growth in integuments through two independent processes: the attenuation of the protein kinase PDK1 in the cytoplasm and the repression of the transcription factor ATS in the nucleus.
Collapse
Affiliation(s)
- Sebastian Scholz
- Entwicklungsbiologie der Pflanzen, Wissenschaftszentrum Weihenstephan, Technische Universität München, Freising, Germany
| | - Janys Pleßmann
- Entwicklungsbiologie der Pflanzen, Wissenschaftszentrum Weihenstephan, Technische Universität München, Freising, Germany
| | - Balaji Enugutti
- Entwicklungsbiologie der Pflanzen, Wissenschaftszentrum Weihenstephan, Technische Universität München, Freising, Germany
| | - Regina Hüttl
- Entwicklungsbiologie der Pflanzen, Wissenschaftszentrum Weihenstephan, Technische Universität München, Freising, Germany
| | - Katrin Wassmer
- Entwicklungsbiologie der Pflanzen, Wissenschaftszentrum Weihenstephan, Technische Universität München, Freising, Germany
| | - Kay Schneitz
- Entwicklungsbiologie der Pflanzen, Wissenschaftszentrum Weihenstephan, Technische Universität München, Freising, Germany
- * E-mail:
| |
Collapse
|
40
|
Han T, Wu N, Wang Y, Shen W, Zou J. miR‑16‑2‑3p inhibits cell proliferation and migration and induces apoptosis by targeting PDPK1 in maxillary primordium mesenchymal cells. Int J Mol Med 2019; 43:1441-1451. [PMID: 30664182 PMCID: PMC6365086 DOI: 10.3892/ijmm.2019.4070] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 01/16/2019] [Indexed: 12/19/2022] Open
Abstract
MicroRNAs (miRNAs) post-transcriptionally regulate gene expression by targeting the 3′ untranslated region (UTR) of target genes, and serve diverse roles in cell proliferation, differentiation and apoptosis. However, the association between miR-16-2-3p and 3-phosphoinositide-dependent protein kinase-1 (PDPK1) in nonsyndromic cleft lip (NSCL) remains unclear. In the present study, a luciferase activity assay indicated that miR-16-2-3p negatively regulated PDPK1 in maxillary primordium mesenchymal cells (MPMCs). In addition, it was confirmed that the expression levels of miR-16-2-3p was markedly increased in cleft lip tissues compared with those in adjacent normal lip tissues. A negative correlation between miR-16-2-3p and PDPK1 in cleft lip tissues was observed. Furthermore, miR-16-2-3p inhibited cell proliferation and migration, and induced apoptosis of MPMCs via repressing PDPK1. Finally, miR-16-2-3p exerted its suppressive role in MPMCs by inhibiting the PDPK1/protein kinase B signaling pathway. These results indicate that miR-16-2-3p may inhibit cell proliferation and migration, and promote apoptosis in MPMCs through repression of PDPK1 and may be a potential target for future clinical prevention and treatment of NSCL.
Collapse
Affiliation(s)
- Tao Han
- Department of Burns and Plastic Surgery, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
| | - Ni Wu
- Department of Burns and Plastic Surgery, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
| | - Youjing Wang
- Department of Burns and Plastic Surgery, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
| | - Weimin Shen
- Department of Burns and Plastic Surgery, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
| | - Jijun Zou
- Department of Burns and Plastic Surgery, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
| |
Collapse
|
41
|
Xing T, Hass DT, Zhang SS, Barnstable CJ. The 3-Phosphoinositide-Dependent Protein Kinase 1 Inhibits Rod Photoreceptor Development. Front Cell Dev Biol 2018; 6:134. [PMID: 30364083 PMCID: PMC6191476 DOI: 10.3389/fcell.2018.00134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 09/24/2018] [Indexed: 01/30/2023] Open
Abstract
The transition of rod precursor cells to post-mitotic rod photoreceptors can be promoted by extrinsic factors such as insulin-like growth factor 1 (IGF-1), which regulates phosphatidylinositide concentration, and consequently the 3-phosphoinositide-dependent protein kinase-1 (PDPK-1). PDPK-1 is a 63 kDa cytoplasmic kinase that controls cell proliferation and differentiation. In the mouse retina, PDPK-1 and its phosphorylated derivative p-PDPK-1 (Ser241), showed peak expression during the first postnatal (PN) day with a substantial decline by PN7 and in the adult retina. Though initially widely distributed among cell types, PDPK-1 expression decreased first in the inner retina and later in the outer retina. When PDPK-1 is inhibited in neonatal retinal explants by BX795, there is a robust increase in rod photoreceptor numbers. The increase in rods depended on the activity of PKC, as BX795 had no effect when PKC is inhibited. Inhibition of PDPK-1-dependent kinases, such as P70-S6K, but not others, such as mTORC-1, stimulated rod development. The P70-S6K-dependent increase in rods appears to be correlated with phosphorylation of Thr252 and not at Thr389, a substrate of mTORC-1. This pathway is also inactive while PKC activity is inhibited. We also found that inhibition of the kinase mTORC-2, also stimulated by insulin activity, similarly increased rod formation, and this effect appears to be independent of PKC activity. This may represent a novel intracellular signaling pathway that also stimulates photoreceptor development. Consistent with previous studies, stimulation of STAT3 activity is sufficient to prevent any PDPK-1, P70-S6K, or mTORC2-dependent increase in rods. Together the data indicate that PDPK-1 and other intrinsic kinases downstream of IGF-1 are key regulators of rod photoreceptor formation.
Collapse
Affiliation(s)
- Tiaosi Xing
- Department of Anatomy and Cell Biology, East Carolina University, Greenville, NC, United States
| | - Daniel T Hass
- Department of Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, PA, United States
| | - Samuel S Zhang
- Department of Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, PA, United States
| | - Colin J Barnstable
- Department of Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, PA, United States
| |
Collapse
|
42
|
Mucha BE, Banka S, Ajeawung NF, Molidperee S, Chen GG, Koenig MK, Adejumo RB, Till M, Harbord M, Perrier R, Lemyre E, Boucher RM, Skotko BG, Waxler JL, Thomas MA, Hodge JC, Gecz J, Nicholl J, McGregor L, Linden T, Sisodiya SM, Sanlaville D, Cheung SW, Ernst C, Campeau PM. A new microdeletion syndrome involving TBC1D24, ATP6V0C, and PDPK1 causes epilepsy, microcephaly, and developmental delay. Genet Med 2018; 21:1058-1064. [DOI: 10.1038/s41436-018-0290-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 08/17/2018] [Indexed: 12/17/2022] Open
|
43
|
Wang W, Sun X, Hu T, Wang L, Dong S, Gu J, Chu Y, Wang X, Li Y, Ru Y, Cheng T, Yuan W. PDK1 regulates definitive HSCs via the FOXO pathway during murine fetal liver hematopoiesis. Stem Cell Res 2018; 30:192-200. [PMID: 29960148 DOI: 10.1016/j.scr.2018.05.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 05/29/2018] [Accepted: 05/30/2018] [Indexed: 12/13/2022] Open
Abstract
PDK1 (phosphoinositide dependent kinase-1) plays an important regulatory role in B cells, T cells and platelets. Less is known about how PDK1 acts in hematopoietic stem cells (HSCs), especially in the fetal liver (FL) during embryonic hematopoiesis, as the FL is the primary fetal hematopoietic organ and the main site of HSC expansion and differentiation. Here, we deleted the PDK1 gene in hematopoietic cells by crossing Vav-Cre transgenic mice with PDK1f/f mice. Using a transplantation assay, we found that HSCs from the E15.5 FL of Vav-Cre;PDK1f/f embryos are severely impaired compared when compared with HSCs from PDK1f/f or PDK1f/+ FLs. Additionally, we found that there were more FL HSCs in an apoptotic state and active cell cycle in PDK1-deficient embryos than in control embryos. By comparing the expression profiles of FL-derived LSKs in Vav-Cre;PDK1f/f embryos to the controls, we found that the BH3-only protein PUMA and the cyclin family proteins were expressed higher in the Vav-Cre;PDK1f/f group, which may account for the increased apoptosis and activated cell cycle in the deficient HSCs. Furthermore, we demonstrated that the expression of FoxO3a was higher in PDK1-deficient LSKs, indicating that the Akt-FoxO3a-PUMA axis may participate in regulating LSKs apoptosis in the E15.5 FL. In contrast, FoxO1 expression was lower in PDK1-deficient LSK cells, suggesting that Akt-FoxO1-CCND may regulate the HSC cell cycle. Taken together, our findings support a critical role for PDK1 in maintaining FL hematopoiesis via regulating apoptosis and cell cycle of definitive hematopoiesis by the Akt-FOXO signaling pathways.
Collapse
Affiliation(s)
- Weili Wang
- State Key Laboratory of Experimental Hematology, Center for Stem Cell Medicine, Chinese Academy of Medical Sciences, Peking Union Medical College, Institute of Hematology and Blood Diseases Hospital, Tianjin 300020, China
| | - Xiaolu Sun
- State Key Laboratory of Experimental Hematology, Center for Stem Cell Medicine, Chinese Academy of Medical Sciences, Peking Union Medical College, Institute of Hematology and Blood Diseases Hospital, Tianjin 300020, China
| | - Tianyuan Hu
- State Key Laboratory of Experimental Hematology, Center for Stem Cell Medicine, Chinese Academy of Medical Sciences, Peking Union Medical College, Institute of Hematology and Blood Diseases Hospital, Tianjin 300020, China
| | - Le Wang
- State Key Laboratory of Experimental Hematology, Center for Stem Cell Medicine, Chinese Academy of Medical Sciences, Peking Union Medical College, Institute of Hematology and Blood Diseases Hospital, Tianjin 300020, China
| | - Shuxu Dong
- State Key Laboratory of Experimental Hematology, Center for Stem Cell Medicine, Chinese Academy of Medical Sciences, Peking Union Medical College, Institute of Hematology and Blood Diseases Hospital, Tianjin 300020, China
| | - Jie Gu
- State Key Laboratory of Experimental Hematology, Center for Stem Cell Medicine, Chinese Academy of Medical Sciences, Peking Union Medical College, Institute of Hematology and Blood Diseases Hospital, Tianjin 300020, China
| | - Yajing Chu
- State Key Laboratory of Experimental Hematology, Center for Stem Cell Medicine, Chinese Academy of Medical Sciences, Peking Union Medical College, Institute of Hematology and Blood Diseases Hospital, Tianjin 300020, China
| | - Xiaomin Wang
- State Key Laboratory of Experimental Hematology, Center for Stem Cell Medicine, Chinese Academy of Medical Sciences, Peking Union Medical College, Institute of Hematology and Blood Diseases Hospital, Tianjin 300020, China
| | - Yanhan Li
- State Key Laboratory of Experimental Hematology, Center for Stem Cell Medicine, Chinese Academy of Medical Sciences, Peking Union Medical College, Institute of Hematology and Blood Diseases Hospital, Tianjin 300020, China
| | - Yongxin Ru
- State Key Laboratory of Experimental Hematology, Center for Stem Cell Medicine, Chinese Academy of Medical Sciences, Peking Union Medical College, Institute of Hematology and Blood Diseases Hospital, Tianjin 300020, China
| | - Tao Cheng
- State Key Laboratory of Experimental Hematology, Center for Stem Cell Medicine, Chinese Academy of Medical Sciences, Peking Union Medical College, Institute of Hematology and Blood Diseases Hospital, Tianjin 300020, China
| | - Weiping Yuan
- State Key Laboratory of Experimental Hematology, Center for Stem Cell Medicine, Chinese Academy of Medical Sciences, Peking Union Medical College, Institute of Hematology and Blood Diseases Hospital, Tianjin 300020, China.
| |
Collapse
|
44
|
Dinsmore CJ, Soriano P. MAPK and PI3K signaling: At the crossroads of neural crest development. Dev Biol 2018; 444 Suppl 1:S79-S97. [PMID: 29453943 DOI: 10.1016/j.ydbio.2018.02.003] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 02/06/2018] [Accepted: 02/06/2018] [Indexed: 02/08/2023]
Abstract
Receptor tyrosine kinase-mediated growth factor signaling is essential for proper formation and development of the neural crest. The many ligands and receptors implicated in these processes signal through relatively few downstream pathways, frequently converging on the MAPK and PI3K pathways. Despite decades of study, there is still considerable uncertainty about where and when these signaling pathways are required and how they elicit particular responses. This review summarizes our current understanding of growth factor-induced MAPK and PI3K signaling in the neural crest.
Collapse
Affiliation(s)
- Colin J Dinsmore
- Department of Cell, Developmental and Regenerative Biology, Tisch Cancer Institute, Icahn School of Medicine at Mt. Sinai, New York, NY 10029, USA
| | - Philippe Soriano
- Department of Cell, Developmental and Regenerative Biology, Tisch Cancer Institute, Icahn School of Medicine at Mt. Sinai, New York, NY 10029, USA.
| |
Collapse
|
45
|
Xu M, Han X, Liu R, Li Y, Qi C, Yang Z, Zhao C, Gao J. PDK1 Deficit Impairs the Development of the Dentate Gyrus in Mice. Cereb Cortex 2018; 29:1185-1198. [DOI: 10.1093/cercor/bhy024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Indexed: 12/22/2022] Open
Affiliation(s)
- Min Xu
- Department of Neurobiology, Nanjing Medical University, Nanjing, China
- Key Laboratory of Human Functional Genomics of Jiangsu, Nanjing Medical University, Nanjing, China
| | - Xiaoning Han
- Key Laboratory of Developmental Genes and Human Diseases, MOE, Department of Histology and Embryology, School of Medicine, Southeast University, Nanjing, China
| | - Rui Liu
- Department of Neurobiology, Nanjing Medical University, Nanjing, China
- Key Laboratory of Human Functional Genomics of Jiangsu, Nanjing Medical University, Nanjing, China
| | - Yanjun Li
- Model Animal Research Center of Nanjing University and MOE Key Laboratory of Model Animals for Disease Study, Nanjing, China
| | - Cui Qi
- Department of Neurobiology, Nanjing Medical University, Nanjing, China
- Key Laboratory of Human Functional Genomics of Jiangsu, Nanjing Medical University, Nanjing, China
| | - Zhongzhou Yang
- Model Animal Research Center of Nanjing University and MOE Key Laboratory of Model Animals for Disease Study, Nanjing, China
| | - Chunjie Zhao
- Key Laboratory of Developmental Genes and Human Diseases, MOE, Department of Histology and Embryology, School of Medicine, Southeast University, Nanjing, China
- Center of Depression, Beijing Institute for Brain Disorders, Beijing, China
| | - Jun Gao
- Department of Neurobiology, Nanjing Medical University, Nanjing, China
- Key Laboratory of Human Functional Genomics of Jiangsu, Nanjing Medical University, Nanjing, China
| |
Collapse
|
46
|
Gagliardi PA, Puliafito A, Primo L. PDK1: At the crossroad of cancer signaling pathways. Semin Cancer Biol 2018; 48:27-35. [DOI: 10.1016/j.semcancer.2017.04.014] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 03/28/2017] [Accepted: 04/26/2017] [Indexed: 12/28/2022]
|
47
|
Wang LJ, Li NN, Xu SJ, Zhang F, Hao MH, Yang XJ, Cai XH, Qiu PY, Ji HL, Xu P. A new and important relationship between miRNA-147a and PDPK1 in radiotherapy. J Cell Biochem 2018; 119:3519-3527. [PMID: 29144017 DOI: 10.1002/jcb.26523] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 11/13/2017] [Indexed: 11/06/2022]
Abstract
It was found that the expression level of miR-147a was significantly increased and the pathway of PI3K/AKT was dramatically inhibited after radiation. In view of the relationship between miRNA and target genes, we put forward the question, what is the relationship between PI3K/AKT and miR-147a? In order to find the answer to the question, we used bioinformatics techniques to analyze the relationship between miR-147 (a or b) and PI3K/AKT signaling pathway. miR-147a overexpression plasmid and PDPK1 3'UTR luciferase reporter gene plasmid were constructed. Dual luciferase reporter gene system validation experiments were carried out on miR-147a and PDPK1 relationship. The verification experiments were also carried out. Bioinformatics analysis showed that there is a miR-147a binding site in the non-coding region (3'UTR) of PDPK1. In the experimental groups transfected with wild type PDPK1 gene of 3'UTR plasmid, the luciferase activity decreased (or increased) significantly in miR-147a (or inhibitor) group compared with miR-NC (or anti-miR-NC); There was no significant difference between the miR-147a group (or inhibitor) and the miR-NC group (or anti-miR-NC) in the transfection of PDPK1-3'UTR-Mut gene vector. PDPK1 was a target gene for direct regulation of miR-147a downstream. Verifying test results showed that the expression of PDPK1 mRNA and protein was reduced after overexpression of miR-147a, which was up-regulated after silencing miR-147a in TC, and V79 cells. These results suggest that miR-147a could be involved in the regulation of PDPK1 transcription by binding to the target site in PDPK1 mRNA 3'UTR, and then regulated AKT.
Collapse
Affiliation(s)
- Li-Juan Wang
- Department of Pharmacy, Xinxiang Medical University, Xinxiang, Henan, China
| | - Na-Na Li
- Henan Key Laboratory of Medical Tissue Regeneration, Xinxiang Medical University, Xinxiang, Henan, China
| | - Sai-Juan Xu
- Department of Pharmacy, Xinxiang Medical University, Xinxiang, Henan, China
| | - Fan Zhang
- Department of Pharmacy, Xinxiang Medical University, Xinxiang, Henan, China
| | - Ming-Hua Hao
- Department of Pharmacy, Xinxiang Medical University, Xinxiang, Henan, China
| | - Xian-Jun Yang
- International Joint Research Laboratory for Recombiant Pharmaceutical Protein Expression System of Henan, Xinxiang Medical University, Xinxiang, Henan, China
| | - Xin-Hua Cai
- Henan Key Laboratory of Medical Tissue Regeneration, Xinxiang Medical University, Xinxiang, Henan, China
| | - Pei-Yong Qiu
- Department of Pharmacy, Xinxiang Medical University, Xinxiang, Henan, China
| | - Hong-Long Ji
- Institute of Lung and Molecular Therapy, Xinxiang Medical University, Xinxiang, Henan, China
| | - Ping Xu
- Department of Pharmacy, Xinxiang Medical University, Xinxiang, Henan, China
| |
Collapse
|
48
|
Lucena R, Alcaide-Gavilán M, Schubert K, He M, Domnauer MG, Marquer C, Klose C, Surma MA, Kellogg DR. Cell Size and Growth Rate Are Modulated by TORC2-Dependent Signals. Curr Biol 2017; 28:196-210.e4. [PMID: 29290562 DOI: 10.1016/j.cub.2017.11.069] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Revised: 10/19/2017] [Accepted: 11/30/2017] [Indexed: 02/05/2023]
Abstract
The size of all cells, from bacteria to vertebrates, is proportional to the growth rate set by nutrient availability, but the underlying mechanisms are unknown. Here, we show that nutrients modulate cell size and growth rate via the TORC2 signaling network in budding yeast. An important function of the TORC2 network is to modulate synthesis of ceramide lipids, which play roles in signaling. TORC2-dependent control of ceramide signaling strongly influences both cell size and growth rate. Thus, cells that cannot make ceramides fail to modulate their growth rate or size in response to changes in nutrients. PP2A associated with the Rts1 regulatory subunit (PP2ARts1) is embedded in a feedback loop that controls TORC2 signaling and helps set the level of TORC2 signaling to match nutrient availability. Together, the data suggest a model in which growth rate and cell size are mechanistically linked by ceramide-dependent signals arising from the TORC2 network.
Collapse
Affiliation(s)
- Rafael Lucena
- Department of Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Maria Alcaide-Gavilán
- Department of Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Katherine Schubert
- Department of Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Maybo He
- Department of Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Matthew G Domnauer
- Department of Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Catherine Marquer
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University Medical Center, New York, NY 10032, USA; Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY 10032, USA
| | | | | | - Douglas R Kellogg
- Department of Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, Santa Cruz, CA 95064, USA.
| |
Collapse
|
49
|
Targeting PDK1 for Chemosensitization of Cancer Cells. Cancers (Basel) 2017; 9:cancers9100140. [PMID: 29064423 PMCID: PMC5664079 DOI: 10.3390/cancers9100140] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 10/18/2017] [Accepted: 10/19/2017] [Indexed: 01/01/2023] Open
Abstract
Despite the rapid development in the field of oncology, cancer remains the second cause of mortality worldwide, with the number of new cases expected to more than double in the coming years. Chemotherapy is widely used to decelerate or stop tumour development in combination with surgery or radiation therapy when appropriate, and in many cases this improves the symptomatology of the disease. Unfortunately though, chemotherapy is not applicable to all patients and even when it is, there are many cases where a successful initial treatment period is followed by chemotherapeutic drug resistance. This is caused by a number of reasons, ranging from the genetic background of the patient (innate resistance) to the formation of tumour-initiating cells (acquired resistance). In this review, we discuss the potential role of PDK1 in the development of chemoresistance in different types of malignancy, and the design and application of potent inhibitors which can promote chemosensitization.
Collapse
|
50
|
Xu C, Yu L, Hou J, Jackson RJ, Wang H, Huang C, Liu T, Wang Q, Zou X, Morris RG, Spires-Jones TL, Yang Z, Yin Z, Xu Y, Chen G. Conditional Deletion of PDK1 in the Forebrain Causes Neuron Loss and Increased Apoptosis during Cortical Development. Front Cell Neurosci 2017; 11:330. [PMID: 29104535 PMCID: PMC5655024 DOI: 10.3389/fncel.2017.00330] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 10/05/2017] [Indexed: 12/26/2022] Open
Abstract
Decreased expression but increased activity of PDK1 has been observed in neurodegenerative disease. To study in vivo function of PDK1 in neuron survival during cortical development, we generate forebrain-specific PDK1 conditional knockout (cKO) mice. We demonstrate that PDK1 cKO mice display striking neuron loss and increased apoptosis. We report that PDK1 cKO mice exhibit deficits on several behavioral tasks. Moreover, PDK1 cKO mice show decreased activities for Akt and mTOR. These results highlight an essential role of endogenous PDK1 in the maintenance of neuronal survival during cortical development.
Collapse
Affiliation(s)
- Congyu Xu
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study, Nanjing University, Nanjing, China
| | - Linjie Yu
- Department of Neurology, Nanjing Drum Tower Hospital, Nanjing University Medical School, Nanjing, China
| | - Jinxing Hou
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study, Nanjing University, Nanjing, China
| | - Rosemary J Jackson
- Centre for Cognitive and Neural Systems, University of Edinburgh, Edinburgh, United Kingdom
| | - He Wang
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study, Nanjing University, Nanjing, China
| | - Chaoli Huang
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study, Nanjing University, Nanjing, China
| | - Tingting Liu
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study, Nanjing University, Nanjing, China
| | - Qihui Wang
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study, Nanjing University, Nanjing, China
| | - Xiaochuan Zou
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study, Nanjing University, Nanjing, China
| | - Richard G Morris
- Centre for Cognitive and Neural Systems, University of Edinburgh, Edinburgh, United Kingdom.,Consejo Superior de Investigaciones Científicas, Universidad Miguel Hernández, Instituto de Neurociencias, Alicante, Spain
| | - Tara L Spires-Jones
- Centre for Cognitive and Neural Systems, University of Edinburgh, Edinburgh, United Kingdom.,Centre for Dementia Prevention, University of Edinburgh, Edinburgh, United Kingdom.,Euan MacDonald Centre for Motor Neurone Disease Research, University of Edinburgh, Edinburgh, United Kingdom
| | - Zhongzhou Yang
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study, Nanjing University, Nanjing, China
| | - Zhenyu Yin
- Department of Geriatrics, Nanjing Drum Tower Hospital, Nanjing University Medical School, Nanjing, China
| | - Yun Xu
- Department of Neurology, Nanjing Drum Tower Hospital, Nanjing University Medical School, Nanjing, China
| | - Guiquan Chen
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study, Nanjing University, Nanjing, China
| |
Collapse
|