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Wang W, Li Y, Tang L, Shi Y, Li W, Zou L, Zhang L, Cheng Y, Yuan Z, Zhu F, Duan Q. Cross-talk between BCKDK-mediated phosphorylation and STUB1-dependent ubiquitination degradation of BCAT1 promotes GBM progression. Cancer Lett 2024; 591:216849. [PMID: 38621458 DOI: 10.1016/j.canlet.2024.216849] [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: 01/15/2024] [Revised: 03/18/2024] [Accepted: 04/01/2024] [Indexed: 04/17/2024]
Abstract
Branched-chain amino acid transferase 1 (BCAT1) is highly expressed in multiple cancers and is associated with poor prognosis, particularly in glioblastoma (GBM). However, the post-translational modification (PTM) mechanism of BCAT1 is unknown. Here, we investigated the cross-talk mechanisms between phosphorylation and ubiquitination modifications in regulating BCAT1 activity and stability. We found that BCAT1 is phosphorylated by branched chain ketoacid dehydrogenase kinase (BCKDK) at S5, S9, and T312, which increases its catalytic and antioxidant activity and stability. STUB1 (STIP1 homology U-box-containing protein 1), the first we found and reported E3 ubiquitin ligase of BCAT1, can also be phosphorylated by BCKDK at the S19 site, which disrupts the interaction with BCAT1 and inhibits its degradation. In addition, we demonstrate through in vivo and in vitro experiments that BCAT1 phosphorylation inhibiting its ubiquitination at multiple sites is associated with GBM proliferation and that inhibition of the BCKDK-BCAT1 axis enhances the sensitivity to temozolomide (TMZ). Overall, we identified novel mechanisms for the regulation of BCAT1 modification and elucidated the importance of the BCKDK-STUB1-BCAT1 axis in GBM progression.
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Affiliation(s)
- Wei Wang
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China.
| | - Youwei Li
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Department of Pain Management, Affiliated ZhongDa Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China.
| | - Liu Tang
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China.
| | - Yue Shi
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China.
| | - Wensheng Li
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China.
| | - Ling Zou
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China.
| | - Liyuan Zhang
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China.
| | - Yue Cheng
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China.
| | - Zheng Yuan
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China.
| | - Feng Zhu
- Translational Medicine Center, Huaihe Hospital of Henan University, Kaifeng, Henan, 475000, China; The Zhongzhou Laboratory for Integrative Biology, Zhengzhou, Henan, 450000, China; Medical and Industry Crossover Research Institute of Medical College, Henan University, Kaifeng, Henan, 475000, China.
| | - Qiuhong Duan
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Translational Medicine Center, Huaihe Hospital of Henan University, Kaifeng, Henan, 475000, China; The Zhongzhou Laboratory for Integrative Biology, Zhengzhou, Henan, 450000, China; Medical and Industry Crossover Research Institute of Medical College, Henan University, Kaifeng, Henan, 475000, China.
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Gao Z, Gao Y, Li Y, Zhou J, Li G, Xie S, Jia R, Wang L, Jiang Z, Liang M, Du C, Chen Y, Liu Y, Du L, Wang C, Dou S, Lv Z, Wang L, Wang R, Shen B, Wang Z, Li Y, Han G. 5-HT 7R enhances neuroimmune resilience and alleviates meningitis by promoting CCR5 ubiquitination. J Adv Res 2024:S2090-1232(24)00079-1. [PMID: 38432392 DOI: 10.1016/j.jare.2024.02.017] [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: 01/23/2024] [Revised: 02/22/2024] [Accepted: 02/22/2024] [Indexed: 03/05/2024] Open
Abstract
INTRODUCTION Excessive immune activation induces tissue damage during infection. Compared to external strategies to reconstruct immune homeostasis, host balancing ways remain largely unclear. OBJECTIVES Here we found a neuroimmune way that prevents infection-induced tissue damage. METHODS By FACS and histopathology analysis of brain Streptococcus pneumonia meningitis infection model and behavioral testing. Western blot, co-immunoprecipitation, and ubiquitination analyze the Fluoxetine initiate 5-HT7R-STUB1-CCR5 K48-linked ubiquitination degradation. RESULTS Fluoxetine, a selective serotonin reuptake inhibitor, or the agonist of serotonin receptor 5-HT7R, protects mice from meningitis by inhibiting CCR5-mediated excessive immune response and tissue damage. Mechanistically, the Fluoxetine-5-HT7R axis induces proteasome-dependent degradation of CCR5 via mTOR signaling, and then recruits STUB1, an E3 ubiquitin ligase, to initiate K48-linked polyubiquitination of CCR5 at K138 and K322, promotes its proteasomal degradation. STUB1 deficiency blocks 5-HT7R-mediated CCR5 degradation. CONCLUSION Our results reveal a neuroimmune pathway that balances anti-infection immunity via happiness neurotransmitter receptor and suggest the 5-HT7R-CCR5 axis as a potential target to promote neuroimmune resilience.
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Affiliation(s)
- Zhenfang Gao
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China
| | - Yang Gao
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China
| | - Yuxiang Li
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China
| | - Jie Zhou
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China
| | - Ge Li
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China
| | - Shun Xie
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China
| | - Ruiyan Jia
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China
| | - Lanying Wang
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China
| | - Ziying Jiang
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China
| | - Meng Liang
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China
| | - Chunxiao Du
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China
| | - Yaqiong Chen
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China
| | - Yinji Liu
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China
| | - Lin Du
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China
| | - Cong Wang
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China
| | - Shuaijie Dou
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China
| | - Zhonglin Lv
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China
| | - Lubin Wang
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China
| | - Renxi Wang
- Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100069, China
| | - Beifen Shen
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China
| | - Zhiding Wang
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China.
| | - Yunfeng Li
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China.
| | - Gencheng Han
- Beijing Institute of Basic Medical Sciences, Beijing 100850, China.
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3
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Kim C, Wang XD, Liu Z, Hao J, Wang S, Li P, Zi Z, Ding Q, Jang S, Kim J, Luo Y, Huffman KE, Pal Choudhuri S, del Rio S, Cai L, Liang H, Drapkin BJ, Minna JD, Yu Y. Induced degradation of lineage-specific oncoproteins drives the therapeutic vulnerability of small cell lung cancer to PARP inhibitors. SCIENCE ADVANCES 2024; 10:eadh2579. [PMID: 38241363 PMCID: PMC10798557 DOI: 10.1126/sciadv.adh2579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 12/20/2023] [Indexed: 01/21/2024]
Abstract
Although BRCA1/2 mutations are not commonly found in small cell lung cancer (SCLC), a substantial fraction of SCLC shows clinically relevant response to PARP inhibitors (PARPis). However, the underlying mechanism(s) of PARPi sensitivity in SCLC is poorly understood. We performed quantitative proteomic analyses and identified proteomic changes that signify PARPi responses in SCLC cells. We found that the vulnerability of SCLC to PARPi could be explained by the degradation of lineage-specific oncoproteins (e.g., ASCL1). PARPi-induced activation of the E3 ligase HUWE1 mediated the ubiquitin-proteasome system (UPS)-dependent ASCL1 degradation. Although PARPi induced a general DNA damage response in SCLC cells, this signal generated a cell-specific response in ASCL1 degradation, leading to the identification of HUWE1 expression as a predictive biomarker for PARPi. Combining PARPi with agents targeting these pathways markedly improved therapeutic response in SCLC. The degradation of lineage-specific oncoproteins therefore represents a previously unidentified mechanism for PARPi efficacy in SCLC.
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Affiliation(s)
- Chiho Kim
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Department of Molecular Pharmacology and Therapeutics, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
| | - Xu-Dong Wang
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Department of Molecular Pharmacology and Therapeutics, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
| | - Zhengshuai Liu
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Department of Molecular Pharmacology and Therapeutics, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
| | - Jianwei Hao
- Department of Molecular Pharmacology and Therapeutics, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
| | - Shuai Wang
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Peng Li
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Zhenzhen Zi
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Qing Ding
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Seoyeon Jang
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Jiwoong Kim
- Quantitative Biomedical Research Center, Department of Population and Data Sciences, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Yikai Luo
- Department of Bioinformatics and Computational Biology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Kenneth E. Huffman
- Hamon Center for Therapeutic Oncology Research, Simmons Comprehensive Cancer Center, Departments of Internal Medicine and Pharmacology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Shreoshi Pal Choudhuri
- Hamon Center for Therapeutic Oncology Research, Simmons Comprehensive Cancer Center, Departments of Internal Medicine and Pharmacology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Sofia del Rio
- Department of Molecular Pharmacology and Therapeutics, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
| | - Ling Cai
- Quantitative Biomedical Research Center, Department of Population and Data Sciences, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Han Liang
- Department of Bioinformatics and Computational Biology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Benjamin J. Drapkin
- Hamon Center for Therapeutic Oncology Research, Simmons Comprehensive Cancer Center, Departments of Internal Medicine and Pharmacology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - John D. Minna
- Hamon Center for Therapeutic Oncology Research, Simmons Comprehensive Cancer Center, Departments of Internal Medicine and Pharmacology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Yonghao Yu
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Department of Molecular Pharmacology and Therapeutics, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
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4
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Kim C, Wang XD, Jang S, Yu Y. PARP1 inhibitors induce pyroptosis via caspase 3-mediated gasdermin E cleavage. Biochem Biophys Res Commun 2023; 646:78-85. [PMID: 36706709 PMCID: PMC9933147 DOI: 10.1016/j.bbrc.2023.01.055] [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: 01/04/2023] [Revised: 01/11/2023] [Accepted: 01/19/2023] [Indexed: 01/22/2023]
Abstract
The identification of PARP1 as a therapeutic target for BRCA1/2-deficient cells has led to a paradigm shift for the treatment of human malignancies with BRCA1/2 mutations. However, our understanding of the mechanism of action of PARP1 inhibitors (PARPi) is still evolving. It is being increasingly appreciated that the immunomodulatory function of PARPi is a critical contributor of the anti-tumor effects of these compounds. Here, we identify a novel cell death effector pathway for PARPi where PARPi induces inflammatory pyroptosis that is mediated by caspase 3-dependent cleavage of GSDME. Caspase 3 is activated upon PARPi treatment which directly cleaves GSDME and, subsequently induces pyroptosis. Genetic and pharmacological experiments show that the presence of the PARP1 protein with uncompromised DNA binding capability is required for PARPi-induced pyroptosis, suggesting that PARP1 trapping is a key driver of this phenomenon. Importantly, we show that PARPi-induced GSDME cleavage and pyroptosis occurred only in the BRCA1-deficient cells, but not in those reconstituted with BRCA1 wild-type (WT). These findings suggest that pyroptosis could be a novel aspect of the immunomodulatory function of PARPi. Our studies could also offer new insights to the potential biomarkers and therapeutic strategies to achieve better anti-tumor effects of PARPi for BRCA-deficient tumors with low GSDME expression.
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Affiliation(s)
- Chiho Kim
- Department of Molecular Pharmacology and Therapeutics, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Xu-Dong Wang
- Department of Molecular Pharmacology and Therapeutics, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Seoyeon Jang
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Yonghao Yu
- Department of Molecular Pharmacology and Therapeutics, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, NY, 10032, USA.
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5
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Backe SJ, Woodford MR, Ahanin E, Sager RA, Bourboulia D, Mollapour M. Impact of Co-chaperones and Posttranslational Modifications Toward Hsp90 Drug Sensitivity. Subcell Biochem 2023; 101:319-350. [PMID: 36520312 PMCID: PMC10077965 DOI: 10.1007/978-3-031-14740-1_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Posttranslational modifications (PTMs) regulate myriad cellular processes by modulating protein function and protein-protein interaction. Heat shock protein 90 (Hsp90) is an ATP-dependent molecular chaperone whose activity is responsible for the stabilization and maturation of more than 300 client proteins. Hsp90 is a substrate for numerous PTMs, which have diverse effects on Hsp90 function. Interestingly, many Hsp90 clients are enzymes that catalyze PTM, demonstrating one of the several modes of regulation of Hsp90 activity. Approximately 25 co-chaperone regulatory proteins of Hsp90 impact structural rearrangements, ATP hydrolysis, and client interaction, representing a second layer of influence on Hsp90 activity. A growing body of literature has also established that PTM of these co-chaperones fine-tune their activity toward Hsp90; however, many of the identified PTMs remain uncharacterized. Given the critical role of Hsp90 in supporting signaling in cancer, clinical evaluation of Hsp90 inhibitors is an area of great interest. Interestingly, differential PTM and co-chaperone interaction have been shown to impact Hsp90 binding to its inhibitors. Therefore, understanding these layers of Hsp90 regulation will provide a more complete understanding of the chaperone code, facilitating the development of new biomarkers and combination therapies.
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Affiliation(s)
- Sarah J Backe
- Department of Urology, SUNY Upstate Medical University, Syracuse, NY, USA.,Department of Biochemistry and Molecular Biology, SUNY Upstate Medical University, Syracuse, NY, USA.,Upstate Cancer Center, SUNY Upstate Medical University, Syracuse, NY, USA
| | - Mark R Woodford
- Department of Urology, SUNY Upstate Medical University, Syracuse, NY, USA.,Department of Biochemistry and Molecular Biology, SUNY Upstate Medical University, Syracuse, NY, USA.,Upstate Cancer Center, SUNY Upstate Medical University, Syracuse, NY, USA
| | - Elham Ahanin
- Department of Urology, SUNY Upstate Medical University, Syracuse, NY, USA.,Department of Biochemistry and Molecular Biology, SUNY Upstate Medical University, Syracuse, NY, USA.,Upstate Cancer Center, SUNY Upstate Medical University, Syracuse, NY, USA
| | - Rebecca A Sager
- Department of Urology, SUNY Upstate Medical University, Syracuse, NY, USA.,Department of Biochemistry and Molecular Biology, SUNY Upstate Medical University, Syracuse, NY, USA.,Upstate Cancer Center, SUNY Upstate Medical University, Syracuse, NY, USA
| | - Dimitra Bourboulia
- Department of Urology, SUNY Upstate Medical University, Syracuse, NY, USA.,Department of Biochemistry and Molecular Biology, SUNY Upstate Medical University, Syracuse, NY, USA.,Upstate Cancer Center, SUNY Upstate Medical University, Syracuse, NY, USA
| | - Mehdi Mollapour
- Department of Urology, SUNY Upstate Medical University, Syracuse, NY, USA. .,Department of Biochemistry and Molecular Biology, SUNY Upstate Medical University, Syracuse, NY, USA. .,Upstate Cancer Center, SUNY Upstate Medical University, Syracuse, NY, USA.
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6
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Kal S, Chakraborty S, Karmakar S, Ghosh MK. Wnt/β-catenin signaling and p68 conjointly regulate CHIP in colorectal carcinoma. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2022; 1869:119185. [PMID: 34890713 DOI: 10.1016/j.bbamcr.2021.119185] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 11/23/2021] [Accepted: 11/28/2021] [Indexed: 12/12/2022]
Abstract
Emerging evidences suggest abundant expression of Carboxy terminus of Hsc70 Interacting Protein or CHIP (alias STIP1 Homology and U-box Containing Protein 1 or STUB1) in colorectal carcinoma, but the mechanistic detail of this augmented expression pattern is unclear. The signature driver of canonical Wnt pathway, β-catenin, and its co-activator RNA helicase p68, are also overexpressed in colorectal carcinoma. In this study, we describe a novel mechanism of Wnt/β-catenin and p68 mediated transcriptional activation of CHIP gene leading to enhanced proliferation of colorectal carcinoma cells. Bioinformatic analyses reconfirmed an elevated CHIP expression level in colorectal carcinoma datasets. Wnt3A treatment and pharmacological activation of canonical Wnt signaling pathway resulted in increased nuclear translocation of β-catenin, augmenting CHIP expression. Likewise, immunoblotting and Real time PCR following overexpression and knockdown of β-catenin and p68 demonstrated upregulated and downregulated CHIP expression, respectively, at both mRNA and protein levels. p68 along with β-catenin were found to occupy Transcription Factor 4 (TCF4) binding sites on endogenous CHIP promoter and regulate its transcription. After cloning CHIP promoter, the increased and decreased promoter activities of CHIP induced by overexpression and knockdown of either β-catenin or p68 further confirmed transcriptional regulation of CHIP gene by Wnt/β-catenin signaling cascade. Finally, enhanced cellular propagation and migration of colorectal carcinoma cells induced by 'Wnt/β-catenin-p68-CHIP' axis established the significance of this pathway in oncogenesis. To the best of our knowledge, this is the first report elucidating the mechanistic details of transcriptional regulation of CHIP (STUB1) gene expression.
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Affiliation(s)
- Satadeepa Kal
- Cancer Biology and Inflammatory Disorder Division, Council of Scientific and Industrial Research-Indian Institute of Chemical Biology (CSIR-IICB), TRUE Campus, CN-6, Sector-V, Salt Lake, Kolkata- 700091 & 4, Raja S.C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Shrabastee Chakraborty
- Cancer Biology and Inflammatory Disorder Division, Council of Scientific and Industrial Research-Indian Institute of Chemical Biology (CSIR-IICB), TRUE Campus, CN-6, Sector-V, Salt Lake, Kolkata- 700091 & 4, Raja S.C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Subhajit Karmakar
- Cancer Biology and Inflammatory Disorder Division, Council of Scientific and Industrial Research-Indian Institute of Chemical Biology (CSIR-IICB), TRUE Campus, CN-6, Sector-V, Salt Lake, Kolkata- 700091 & 4, Raja S.C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Mrinal K Ghosh
- Cancer Biology and Inflammatory Disorder Division, Council of Scientific and Industrial Research-Indian Institute of Chemical Biology (CSIR-IICB), TRUE Campus, CN-6, Sector-V, Salt Lake, Kolkata- 700091 & 4, Raja S.C. Mullick Road, Jadavpur, Kolkata 700032, India.
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7
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Kumar S, Basu M, Ghosh MK. Chaperone-assisted E3 ligase CHIP: A double agent in cancer. Genes Dis 2021; 9:1521-1555. [PMID: 36157498 PMCID: PMC9485218 DOI: 10.1016/j.gendis.2021.08.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 08/06/2021] [Indexed: 12/11/2022] Open
Abstract
The carboxy-terminus of Hsp70-interacting protein (CHIP) is a ubiquitin ligase and co-chaperone belonging to Ubox family that plays a crucial role in the maintenance of cellular homeostasis by switching the equilibrium of the folding-refolding mechanism towards the proteasomal or lysosomal degradation pathway. It links molecular chaperones viz. HSC70, HSP70 and HSP90 with ubiquitin proteasome system (UPS), acting as a quality control system. CHIP contains charged domain in between N-terminal tetratricopeptide repeat (TPR) and C-terminal Ubox domain. TPR domain interacts with the aberrant client proteins via chaperones while Ubox domain facilitates the ubiquitin transfer to the client proteins for ubiquitination. Thus, CHIP is a classic molecule that executes ubiquitination for degradation of client proteins. Further, CHIP has been found to be indulged in cellular differentiation, proliferation, metastasis and tumorigenesis. Additionally, CHIP can play its dual role as a tumor suppressor as well as an oncogene in numerous malignancies, thus acting as a double agent. Here, in this review, we have reported almost all substrates of CHIP established till date and classified them according to the hallmarks of cancer. In addition, we discussed about its architectural alignment, tissue specific expression, sub-cellular localization, folding-refolding mechanisms of client proteins, E4 ligase activity, normal physiological roles, as well as involvement in various diseases and tumor biology. Further, we aim to discuss its importance in HSP90 inhibitors mediated cancer therapy. Thus, this report concludes that CHIP may be a promising and worthy drug target towards pharmaceutical industry for drug development.
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8
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RING-finger protein 166 plays a novel pro-apoptotic role in neurotoxin-induced neurodegeneration via ubiquitination of XIAP. Cell Death Dis 2020; 11:939. [PMID: 33130818 PMCID: PMC7603511 DOI: 10.1038/s41419-020-03145-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 10/14/2020] [Accepted: 10/16/2020] [Indexed: 12/16/2022]
Abstract
The dopaminergic neurotoxin, 6-hydroxydopamine (6-OHDA), has been widely utilized to establish experimental models of Parkinson disease and to reveal the critical molecules and pathway underlying neuronal death. The profile of gene expression changes following 6-OHDA treatment of MN9D dopaminergic neuronal cells was investigated using a TwinChip Mouse-7.4K microarray. Functional clustering of altered sets of genes identified RING-finger protein 166 (RNF166). RNF166 is composed of an N-terminal RING domain and C-terminal ubiquitin interaction motif. RNF166 localized in the cytosol and nucleus. At the tissue level, RNF166 was widely expressed in the central nervous system and peripheral organs. In the cerebral cortex, its expression decreased over time. In certain conditions, overexpression of RNF166 accelerates the naturally occurring neuronal death and 6-OHDA-induced MN9D cell death as determined by TUNEL and annexin-V staining, and caspase activation. Consequently, 6-OHDA-induced apoptotic cell death was attenuated in RNF166-knockdown cells. In an attempt to elucidate the mechanism underlying this pro-apoptotic activity, binding protein profiles were assessed using the yeast two-hybrid system. Among several potential binding candidates, RNF166 was shown to interact with the cytoplasmic X-linked inhibitor of apoptosis (XIAP), inducing ubiquitin-dependent degradation of XIAP and eventually accelerating caspase activation following 6-OHDA treatment. RNF166's interaction with and resulting inhibition of the XIAP anti-caspase activity was further enhanced by XIAP-associated factor-1 (XAF-1). Consequently, depletion of RNF166 suppressed 6-OHDA-induced caspase activation and apoptotic cell death, which was reversed by XIAP knockdown. In summary, our data suggest that RNF166, a novel E3 ligase, plays a pro-apoptotic role via caspase activation in neuronal cells.
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9
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Ranek MJ, Oeing C, Sanchez-Hodge R, Kokkonen-Simon KM, Dillard D, Aslam MI, Rainer PP, Mishra S, Dunkerly-Eyring B, Holewinski RJ, Virus C, Zhang H, Mannion MM, Agrawal V, Hahn V, Lee DI, Sasaki M, Van Eyk JE, Willis MS, Page RC, Schisler JC, Kass DA. CHIP phosphorylation by protein kinase G enhances protein quality control and attenuates cardiac ischemic injury. Nat Commun 2020; 11:5237. [PMID: 33082318 PMCID: PMC7575552 DOI: 10.1038/s41467-020-18980-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 09/23/2020] [Indexed: 12/11/2022] Open
Abstract
Proteotoxicity from insufficient clearance of misfolded/damaged proteins underlies many diseases. Carboxyl terminus of Hsc70-interacting protein (CHIP) is an important regulator of proteostasis in many cells, having E3-ligase and chaperone functions and often directing damaged proteins towards proteasome recycling. While enhancing CHIP functionality has broad therapeutic potential, prior efforts have all relied on genetic upregulation. Here we report that CHIP-mediated protein turnover is markedly post-translationally enhanced by direct protein kinase G (PKG) phosphorylation at S20 (mouse, S19 human). This increases CHIP binding affinity to Hsc70, CHIP protein half-life, and consequent clearance of stress-induced ubiquitinated-insoluble proteins. PKG-mediated CHIP-pS20 or expressing CHIP-S20E (phosphomimetic) reduces ischemic proteo- and cytotoxicity, whereas a phospho-silenced CHIP-S20A amplifies both. In vivo, depressing PKG activity lowers CHIP-S20 phosphorylation and protein, exacerbating proteotoxicity and heart dysfunction after ischemic injury. CHIP-S20E knock-in mice better clear ubiquitinated proteins and are cardio-protected. PKG activation provides post-translational enhancement of protein quality control via CHIP.
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Affiliation(s)
- Mark J Ranek
- Division of Cardiology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD, 21205, USA
| | - Christian Oeing
- Division of Cardiology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD, 21205, USA
| | - Rebekah Sanchez-Hodge
- Division of Cardiology, McAllister Heart Institute, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Kristen M Kokkonen-Simon
- Division of Cardiology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD, 21205, USA
| | - Danielle Dillard
- Division of Cardiology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD, 21205, USA
| | - M Imran Aslam
- Division of Cardiology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD, 21205, USA
| | - Peter P Rainer
- Division of Cardiology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD, 21205, USA
- Division of Cardiology, Department of Medicine, Medical University of Graz, 8036, Graz, Austria
| | - Sumita Mishra
- Division of Cardiology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD, 21205, USA
| | - Brittany Dunkerly-Eyring
- Division of Cardiology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD, 21205, USA
| | - Ronald J Holewinski
- Cedar Sinai Medical Center, Advanced Clinical Biosystems Research Institute, The Smidt Heart Institute, 8700 Beverly Blvd, AHSP A9229, Los Angeles, CA, 90048, USA
| | - Cornelia Virus
- Division of Cardiology, McAllister Heart Institute, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Huaqun Zhang
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH, 45056, USA
| | - Matthew M Mannion
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH, 45056, USA
| | - Vineet Agrawal
- Division of Cardiology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD, 21205, USA
| | - Virginia Hahn
- Division of Cardiology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD, 21205, USA
| | - Dong I Lee
- Division of Cardiology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD, 21205, USA
| | - Masayuki Sasaki
- Division of Cardiology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD, 21205, USA
| | - Jennifer E Van Eyk
- Cedar Sinai Medical Center, Advanced Clinical Biosystems Research Institute, The Smidt Heart Institute, 8700 Beverly Blvd, AHSP A9229, Los Angeles, CA, 90048, USA
| | - Monte S Willis
- Division of Cardiology, McAllister Heart Institute, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Richard C Page
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH, 45056, USA
| | - Jonathan C Schisler
- Division of Cardiology, McAllister Heart Institute, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Department of Pharmacology, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - David A Kass
- Division of Cardiology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD, 21205, USA.
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10
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Kim C, Wang XD, Yu Y. PARP1 inhibitors trigger innate immunity via PARP1 trapping-induced DNA damage response. eLife 2020; 9:60637. [PMID: 32844745 PMCID: PMC7486119 DOI: 10.7554/elife.60637] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 08/25/2020] [Indexed: 12/12/2022] Open
Abstract
It is being increasingly appreciated that the immunomodulatory functions of PARP1 inhibitors (PARPi) underlie their clinical activities in various BRCA-mutated tumors. PARPi possess both PARP1 inhibition and PARP1 trapping activities. The relative contribution of these two mechanisms toward PARPi-induced innate immune signaling, however, is poorly understood. We find that the presence of the PARP1 protein with uncompromised DNA-binding activities is required for PARPi-induced innate immune response. The activation of cGAS-STING signaling induced by various PARPi closely depends on their PARP1 trapping activities. Finally, we show that a small molecule PARP1 degrader blocks the enzymatic activity of PARP1 without eliciting PARP1 trapping or cGAS-STING activation. Our findings thus identify PARP1 trapping as a major contributor of the immunomodulatory functions of PARPi. Although PARPi-induced innate immunity is highly desirable in human malignancies, the ability of ‘non-trapping’ PARP1 degraders to avoid the activation of innate immune response could be useful in non-oncological diseases.
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Affiliation(s)
- Chiho Kim
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, United States
| | - Xu-Dong Wang
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, United States
| | - Yonghao Yu
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, United States
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11
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Ko YU, Song HY, Kim WK, Yune TY, Yun N, Oh YJ. Calpain-mediated cleavage of Fbxw7 during excitotoxicity. Neurosci Lett 2020; 736:135265. [PMID: 32707070 DOI: 10.1016/j.neulet.2020.135265] [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: 03/16/2020] [Revised: 07/14/2020] [Accepted: 07/17/2020] [Indexed: 12/13/2022]
Abstract
Neuronal cell death induced by ischemic injury has been attributed to glutamate receptor-mediated excitotoxicity, which is known to be accompanied by Ca2+ overload in the cytoplasm with concomitant activation of calcium-dependent mechanisms. More specifically, the overactivation of calpains, calcium-dependent cysteine proteases, have been associated with neuronal cell death following glutamate treatment. Previously, we observed decreased expression levels of F-box/WD repeat domain-containing protein 7 (Fbxw7) after the hyperactivation of cyclin-dependent kinase 5 (Cdk5) in cortical neurons challenged with glutamate. As determined using in vitro calpain cleavage assays, we demonstrated that the cleavage of Fbxw7 was mediated by activated calpain and attenuated in the presence of the calpain inhibitor, calpeptin. Using the rat middle cerebral artery occlusion model, we confirmed that Fbxw7 was indeed cleaved by activated calpain in the ipsilateral cortex. Based on our data, we hypothesize that the negative regulation of Fbxw7 by calpain may contribute to neuronal cell death and that the preservation of Fbxw7 by the inhibition of calpain, Cdk5, or both composes a novel protective mechanism following excitotoxicity.
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Affiliation(s)
- Yeon Uk Ko
- Department of Systems Biology, Yonsei University College of Life Science and Biotechnology, Seoul 03722, South Korea
| | - Hwa Young Song
- Department of Neuroscience, College of Medicine, Korea University, Seoul 02841, South Korea
| | - Won-Ki Kim
- Department of Neuroscience, College of Medicine, Korea University, Seoul 02841, South Korea
| | - Tae Young Yune
- Age-Related and Brain Diseases Research Center, Kyung Hee University, Seoul 02447, South Korea
| | - Nuri Yun
- Department of Systems Biology, Yonsei University College of Life Science and Biotechnology, Seoul 03722, South Korea.
| | - Young J Oh
- Department of Systems Biology, Yonsei University College of Life Science and Biotechnology, Seoul 03722, South Korea.
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12
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Wang Y, Li L, Liu G, Xu T, Xiao D, Zhang L, Wan Q, Chang W, An Y, Wang J. Baicalein protects cardiomyocytes from oxidative stress induced programmed necrosis by stabilizing carboxyl terminus of Hsc70-interacting protein. Int J Cardiol 2020; 311:83-90. [PMID: 32291174 DOI: 10.1016/j.ijcard.2020.03.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 01/21/2020] [Accepted: 03/11/2020] [Indexed: 12/30/2022]
Abstract
Cardiomyocyte necrosis has been reported to be a major component in pathogenesis of cardiac diseases. We noticed that baicalein, a kind of principal components in the roots of Scutellaria baicalensis Georgi, exerts cardioprotective effects by inhibiting oxidative stress and apoptosis of Cardiomyocytes. However, it is rarely reported whether baicalein exerts myocardial protection by inhibiting necrosis. In addition, the death receptor-dependent necrotic cell death is mediated by receptor interacting serine/threonine kinase 1/3(RIPK1/RIPK3). Thus, targeting RIPK1/RIPK3 may represent potential preventive and therapeutic opportunities of necrosis-related cardiac diseases. Carboxyl terminus of Hsc70-interacting protein (CHIP) has been reported to play a significant role on cardiac protection through its E3 ubiquitin ligase activity, but it is not clear whether CHIP regulates RIP1K/RIPK3 in cardiomyocytes necrosis. In our study, we firstly found that baicalein attenuated myocardial necrosis in vitro and in vivo, and it significantly suppressed myocardial necrosis induced by oxidative stress through disturbing RIPK1/RIPK3 necrososme formation in vitro. Besides, we verified that CHIP suppressed myocardial necrosis through ubiquitylation-dependent degradation of RIPK3. And then we firstly speculated that baicalein may promote stability of CHIP to exert cardioprotective effects, and we also found that baicalein promoted the E3 ubiquitin ligase activity of CHIP to negatively regulate RIPK3. Taken together, our results for the first time reveal a pivotal role of baicalein in stabilizing CHIP activity to promote RIPK1/RIPK3 ubiquination and degradation in order to attenuate Cardiomyocyte necrosis.
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Affiliation(s)
- Yu Wang
- School of Basic Medical Sciences, Qingdao University, Qingdao 266071, China; Institute for Translational Medicine, Qingdao University, Qingdao 266021, China
| | - Ling Li
- School of Basic Medical Sciences, Qingdao University, Qingdao 266071, China
| | - Gaoli Liu
- Affiliated Hospital, Qingdao University, Qingdao 266003, China
| | - Tao Xu
- Institute for Translational Medicine, Qingdao University, Qingdao 266021, China
| | - Dandan Xiao
- Institute for Translational Medicine, Qingdao University, Qingdao 266021, China
| | - Liwei Zhang
- Institute for Translational Medicine, Qingdao University, Qingdao 266021, China
| | - Qinggong Wan
- Institute for Translational Medicine, Qingdao University, Qingdao 266021, China
| | - Wenguang Chang
- Institute for Translational Medicine, Qingdao University, Qingdao 266021, China
| | - Yi An
- Affiliated Hospital, Qingdao University, Qingdao 266003, China
| | - Jianxun Wang
- School of Basic Medical Sciences, Qingdao University, Qingdao 266071, China; Institute for Translational Medicine, Qingdao University, Qingdao 266021, China.
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13
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Ko YU, Kim SJ, Lee J, Song MY, Park KS, Park JB, Cho HS, Oh YJ. Protein kinase A-induced phosphorylation at the Thr154 affects stability of DJ-1. Parkinsonism Relat Disord 2019; 66:143-150. [DOI: 10.1016/j.parkreldis.2019.07.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 06/28/2019] [Accepted: 07/22/2019] [Indexed: 10/26/2022]
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Site-specific phosphorylation of Fbxw7 by Cdk5/p25 and its resulting decreased stability are linked to glutamate-induced excitotoxicity. Cell Death Dis 2019; 10:579. [PMID: 31371703 PMCID: PMC6675790 DOI: 10.1038/s41419-019-1818-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 07/08/2019] [Accepted: 07/17/2019] [Indexed: 12/22/2022]
Abstract
Cyclin-dependent kinase 5 (Cdk5) is a serine/threonine protein kinase that regulates brain development and neurodegeneration. Cdk5 is activated by p25 that is generated from calpain-dependent cleavage of p35. The generation of p25 is responsible for the aberrant hyper-activation of Cdk5, which causes neurodegeneration. Using in vitro assays, we discovered that F-box/WD repeat-containing protein 7 (Fbxw7) is a new substrate of Cdk5. Additionally, Cdk5-dependent phosphorylation of Fbxw7 was detected in the presence of p25, and two amino acid residues (S349 and S372) were determined to be major phosphorylation sites. This phosphorylation was eventually linked to decreased stability of Fbxw7. Using a culture model of cortical neurons challenged with glutamate, we confirmed that decreased stability of Fbxw7 was indeed Cdk5-dependent. Furthermore, diminished levels of Fbxw7 led to increased levels of transcription factor AP-1 (c-Jun), a known substrate of Fbxw7. Given that previous reports demonstrate that c-Jun plays a role in accelerating neuronal apoptosis in these pathological models, our data support the concepts of a molecular cascade in which Cdk5-mediated phosphorylation of Fbxw7 negatively regulates Fbxw7 expression, thereby contributing to neuronal cell death following glutamate-mediated excitotoxicity.
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15
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Xiang XJ, Song L, Deng XJ, Tang Y, Min Z, Luo B, Wen QX, Li KY, Chen J, Ma YL, Zhu BL, Yan Z, Chen GJ. Mitochondrial methionine sulfoxide reductase B2 links oxidative stress to Alzheimer's disease-like pathology. Exp Neurol 2019; 318:145-156. [DOI: 10.1016/j.expneurol.2019.05.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 04/10/2019] [Accepted: 05/08/2019] [Indexed: 01/25/2023]
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Abstract
The maturation of dendritic cells is critical for chronic rhinosinusitis with nasal polyps (CRSwNPs), especially eosinophilic chronic rhinosinusitis with nasal polyps (EosCRSwNPs), but the regulation mechanism of dendritic cells (DCs) maturation is still unclear. We identified nasal mucosa of 20 patients with EosCRSwNP, 16 non-EosCRSwNP patients, and inferior turbinate of 14 patients with nasal septum deviation after surgery. The expression of cyclin-dependent kinase 5 (CDK5) and programmed cell death 1 ligand 1 (PD-L1) were detected by immunofluorescent, real-time quantitative PCR, and Western blot in EosCRSwNP. The level of dendritic cell maturation was detected by flow cytometry and immunofluorescence staining after CDK5 expression interference with small interfering RNA (siRNA). The expression of CDK5 and PD-L1 in EosCRSwNP nasal mucosal tissue was significantly higher than that of non-EosCRSwNP and inferior turbinate nasal mucosa tissue, and there was a positive correlation between them. Immunofluorescence staining showed that CDK5 and PD-L1 were co-localized in dendritic cells. Synergistic stimulation of dendritic cells with LPS and TNF-α promotes the maturation of dendritic cells and increases the expression of CDK5 and PD-L1. However, blocking the expression of CDK5 in dendritic cells with siRNAs leads to a blockage of cell maturation. CDK5 can regulate the expression of PD-L1, and its presence is critical for the maturation of dendritic cells. CDK5 may play an important role in the pathogenesis of CRSwNP disease.
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17
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Zeb A, Son M, Yoon S, Kim JH, Park SJ, Lee KW. Computational Simulations Identified Two Candidate Inhibitors of Cdk5/p25 to Abrogate Tau-associated Neurological Disorders. Comput Struct Biotechnol J 2019; 17:579-590. [PMID: 31073393 PMCID: PMC6495220 DOI: 10.1016/j.csbj.2019.04.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 04/14/2019] [Accepted: 04/17/2019] [Indexed: 01/26/2023] Open
Abstract
Deregulation of Cdk5 is a hallmark in neurodegenerative diseases and its complex with p25 forms Cdk5/p25, thereby causes severe neuropathological insults. Cdk5/p25 abnormally phosphorylates tau protein, and induces tau-associated neurofibrillary tangles in neurological disorders. Therefore, the pharmacological inhibition of Cdk5/p25 alleviates tau-associated neurological disorders. Herein, computational simulations probed two candidate inhibitors of Cdk5/p25. Structure-based pharmacophore investigated the essential complementary chemical features of ATP-binding site of Cdk5 in complex with roscovitine. Resultant pharmacophore harbored polar interactions with Cys83 and Asp86 residues and non-polar interactions with Ile10, Phe80, and Lys133 residues of Cdk5. The chemical space of selected pharmacophore was comprised of two hydrogen bond donors, one hydrogen bond acceptor, and three hydrophobic features. Decoy test validation of pharmacophore obtained highest Guner-Henry score (0.88) and enrichment factor score (7.23). The screening of natural product drug-like databases by validated pharmacophore retrieved 1126 compounds as candidate inhibitors of Cdk5/p25. The docking of candidate inhibitors filtered 10 molecules with docking score >80.00 and established polar and non-polar interactions with the ATP-binding site residues of Cdk5/p25. Finally, molecular dynamics simulation and binding free energy analyses identified two candidate inhibitors of Cdk5/p25. During 30 ns simulation, the candidate inhibitors established <3.0 Å root mean square deviation and stable hydrogen bond interactions with the ATP-binding site residues of Cdk5/p25. The final candidate inhibitors obtained lowest binding free energies of -122.18 kJ/mol and - 117.26 kJ/mol with Cdk5/p25. Overall, we recommend two natural product candidate inhibitors to target the pharmacological inhibition of Cdk5/p25 in tau-associated neurological disorders.
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Key Words
- 2D, Two-dimentional
- 3D, Three-dimentional
- AD, Alzheimer's disease
- ADMET, Absorption, distribution, metabolism, excretion, and toxicity
- ASP, Astex statistical potential
- Aβ, Amyloid beta
- BBB, Blood-brain barrier
- CGMC, Cyclin-dependent kinases, mitogen-activated protein kinases, glycogen synthase kinases, and Cdk-like kinases
- Cdk5, Cyclin-dependent kinase 5
- Cdk5/p25 inhibitors
- Cdks, Cyclin-dependent kinases
- DS, Discovery Studio
- EF, Enrichment factor
- GA, Genetic algorithm
- GFA, Genetic Function Approximation
- GH, Guner-Henry
- GOLD, Genetic optimization of ligand docking
- GROMACS, Groningen Machine for Chemical Simulation
- H-bond, Hydrogen bond
- HBA, Hydrogen bond acceptor
- HBD, Hydrogen bond donor
- HD, Hungtington's disease
- HYP, Hydrophobic
- IBS, InterBioScreen
- K, kelvin
- MD, Molecular dynamics
- MPTP, 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine
- Molecular docking
- Molecular dynamics simulation
- NPT, Number particle, pressure, and temperature
- NVT, Number of particles, volume, and temperature
- P5, A 24-residues mimetic peptide of p35
- PD, Parkinson's disease
- PDB, Protein databank
- PLP, Piecewise linear potential
- PME, Particle mesh ewald
- RMSD, Root mean square deviation
- ROF, Rule of five
- Structure-based pharmacophore modeling
- TAT, Twin-arginine targeting
- TIP3P, Transferable intermolecular potential with 3 points
- Tau-pathogenesis
- ZNPD, Zinc Natural Product Database
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Affiliation(s)
- Amir Zeb
- Division of Life Science, Division of Applied Life Sciences (BK21 Plus), Research Institute of Natural Sciences (RINS), Gyeongsang National University (GNU), 501 Jinju-daero, Jinju 52828, Gyeongnam, Republic of Korea
| | - Minky Son
- Division of Life Science, Division of Applied Life Sciences (BK21 Plus), Research Institute of Natural Sciences (RINS), Gyeongsang National University (GNU), 501 Jinju-daero, Jinju 52828, Gyeongnam, Republic of Korea
| | - Sanghwa Yoon
- Division of Life Science, Division of Applied Life Sciences (BK21 Plus), Research Institute of Natural Sciences (RINS), Gyeongsang National University (GNU), 501 Jinju-daero, Jinju 52828, Gyeongnam, Republic of Korea
| | - Ju Hyun Kim
- Department of Chemistry (BK21 Plus), Research Institute of Natural Science (RINS), Geyongsang National University (GNU), 501 Jinju-daero, Jinju 52828, Gyeongnam, Republic of Korea
| | - Seok Ju Park
- Department of Internal Medicine, College of Medicine, Busan Paik Hospital, Inje University, Busan 47392, Republic of Korea
| | - Keun Woo Lee
- Division of Life Science, Division of Applied Life Sciences (BK21 Plus), Research Institute of Natural Sciences (RINS), Gyeongsang National University (GNU), 501 Jinju-daero, Jinju 52828, Gyeongnam, Republic of Korea
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18
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The acetylation of cyclin-dependent kinase 5 at lysine 33 regulates kinase activity and neurite length in hippocampal neurons. Sci Rep 2018; 8:13676. [PMID: 30209341 PMCID: PMC6135752 DOI: 10.1038/s41598-018-31785-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 08/19/2018] [Indexed: 01/06/2023] Open
Abstract
Cyclin-dependent kinase 5 (CDK5) plays a pivotal role in neural development and neurodegeneration. CDK5 activity can be regulated by posttranslational modifications, including phosphorylation and S-nitrosylation. In this study, we demonstrate a novel mechanism by which the acetylation of CDK5 at K33 (Ac-CDK5) results in the loss of ATP binding and impaired kinase activity. We identify GCN5 and SIRT1 as critical factor controlling Ac-CDK5 levels. Ac-CDK5 achieved its lowest levels in rat fetal brains but was dramatically increased during postnatal periods. Intriguingly, nuclear Ac-CDK5 levels negatively correlated with neurite length in embryonic hippocampal neurons. Either treatment with the SIRT1 activator SRT1720 or overexpression of SIRT1 leads to increases in neurite length, whereas SIRT1 inhibitor EX527 or ectopic expression of acetyl-mimetic (K33Q) CDK5 induced the opposite effect. Furthermore, the expression of nuclear-targeted CDK5 K33Q abolished the SRT1720-induced neurite outgrowth, showing that SIRT1 positively regulates neurite outgrowth via deacetylation of nuclear CDK5. The CDK5 activity-dependent increase of neurite length was mediated by enhanced transcriptional regulation of BDNF via unknown mechanism(s). Our findings identify a novel mechanism by which acetylation-mediated regulation of nuclear CDK5 activity plays a critical role in determining neurite length in embryonic neurons.
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Seo J, Lee EW, Shin J, Seong D, Nam YW, Jeong M, Lee SH, Lee C, Song J. K6 linked polyubiquitylation of FADD by CHIP prevents death inducing signaling complex formation suppressing cell death. Oncogene 2018; 37:4994-5006. [PMID: 29795330 DOI: 10.1038/s41388-018-0323-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 03/06/2018] [Accepted: 03/28/2018] [Indexed: 01/21/2023]
Abstract
Fas-associated death domain (FADD) is an adaptor protein recruiting complexes of caspase 8 to death ligand receptors to induce extrinsic apoptotic cell death in response to a TNF superfamily member. Although, formation of the complex of FADD and caspase 8 upon death stimuli has been studied in detail, posttranslational modifications fine-tuning these processes have yet to be identified. Here we revealed that K6-linked polyubiquitylation of FADD on lysines 149 and 153 mediated by C terminus HSC70-interacting protein (CHIP) plays an important role in preventing formation of the death inducing signaling complex (DISC), thus leading to the suppression of cell death. Cells depleted of CHIP showed higher sensitivity toward death ligands such as FasL and TRAIL, leading to upregulation of DISC formation composed of a death receptor, FADD, and caspase 8. CHIP was able to bind to FADD, induce K6-linked polyubiquitylation of FADD, and suppress DISC formation. By mass spectrometry, lysines 149 and 153 of FADD were found to be responsible for CHIP-mediated FADD ubiquitylation. FADD mutated at these sites was capable of more potent cell death induction as compared with the wild type and was no longer suppressed by CHIP. On the other hand, CHIP deficient in E3 ligase activity was not capable of suppressing FADD function and of FADD ubiquitylation. CHIP depletion in ME-180 cells induced significant sensitization of these cells toward TRAIL in xenograft analyses. These results imply that K6-linked ubiquitylation of FADD by CHIP is a crucial checkpoint in cytokine-dependent extrinsic apoptosis.
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Affiliation(s)
- Jinho Seo
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, 03722, Korea
| | - Eun-Woo Lee
- Metabolic Regulation Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Korea
| | - Jihye Shin
- Center for Theragnosis, Korea Institute of Science and Technology, 5 Hwarang-ro-14-gil, Seoul, 02792, Korea
| | - Daehyeon Seong
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, 03722, Korea
| | - Young Woo Nam
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, 03722, Korea
| | - Manhyung Jeong
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, 03722, Korea
| | - Seon-Hyeong Lee
- Cancer Cell & Molecular Biology Branch, Division of Cancer Biology, National Cancer Center, Goyang, 10408, Korea
| | - Cheolju Lee
- Center for Theragnosis, Korea Institute of Science and Technology, 5 Hwarang-ro-14-gil, Seoul, 02792, Korea
| | - Jaewhan Song
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, 03722, Korea.
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20
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Yoo L, Yoon AR, Yun CO, Chung KC. Covalent ISG15 conjugation to CHIP promotes its ubiquitin E3 ligase activity and inhibits lung cancer cell growth in response to type I interferon. Cell Death Dis 2018; 9:97. [PMID: 29367604 PMCID: PMC5833375 DOI: 10.1038/s41419-017-0138-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 11/10/2017] [Accepted: 11/10/2017] [Indexed: 12/20/2022]
Abstract
The carboxyl terminus of Hsp70-interacting protein (CHIP) acts as a ubiquitin E3 ligase and a link between the chaperones Hsp70/90 and the proteasome system, playing a vital role in maintaining protein homeostasis. CHIP regulates a number of proteins involved in a myriad of physiological and pathological processes, but the underlying mechanism of action via posttranslational modification has not been extensively explored. In this study, we investigated a novel modulatory mode of CHIP and its effect on CHIP enzymatic activity. ISG15, an ubiquitin-like modifier, is induced by type I interferon (IFN) stimulation and can be conjugated to target proteins (ISGylation). Here we demonstrated that CHIP may be a novel target of ISGylation in HEK293 cells stimulated with type I IFN. We also found that Lys143/144/145 and Lys287 residues in CHIP are important for and target residues of ISGylation. Moreover, ISGylation promotes the E3 ubiquitin ligase activity of CHIP, subsequently causing a decrease in levels of oncogenic c-Myc, one of its many ubiquitination targets, in A549 lung cancer cells and inhibiting A549 cell and tumor growth. In conclusion, the present study demonstrates that covalent ISG15 conjugation produces a novel CHIP regulatory mode that enhances the tumor-suppressive activity of CHIP, thereby contributing to the antitumor effect of type I IFN.
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Affiliation(s)
- Lang Yoo
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, 03722, Korea
| | - A-Rum Yoon
- Department of Bioengineering, College of Engineering, Hanyang University, Seoul, 04763, Korea
| | - Chae-Ok Yun
- Department of Bioengineering, College of Engineering, Hanyang University, Seoul, 04763, Korea
| | - Kwang Chul Chung
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, 03722, Korea.
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Kanungo J, Goswami MT, Pant HC. Notch and Cdk5 in Zebrafish Mindbomb Mutant: Co-regulation or Coincidence? Folia Biol (Praha) 2018; 64:35-40. [PMID: 30338754 PMCID: PMC6196738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Notch signalling is critical for the development of the nervous system. In the zebrafish mindbomb mutants, disruption of E3 ubiquitin ligase activity inhibits Notch signalling. In these mutant embryos, precocious development of primary neurons leading to depletion of neural progenitor cells results in a neurogenic phenotype characterized by defects in neural patterning and brain development. Cyclin-dependent kinase 5 (Cdk5), a predominant neuronal kinase, is involved in a variety of essential functions of the nervous system. Most recently, mammalian studies on Notch and Cdk5 regulating each other's function have been emerging. The status of Cdk5 in the mindbomb mutant embryos with excessive primary neurons is not known. In situ hybridization of the zebrafish mindbomb mutant embryos uncovered a robust upregulation in Cdk5 expression but with a reduced Cdk5 activity. The implications of these findings in both the mammalian system and zebrafish are discussed in this mini-review to provide a glimpse into the relationship between Notch and Cdk5 that may explain certain neurodevelopmental defects associated with either mutations in ubiquitin ligase or altered expression of Cdk5.
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Affiliation(s)
- J Kanungo
- Division of Neurotoxicology, National Center for Toxicological Research, US Food and Drug Administration, Jefferson, AR, USA
- National Institute of Neuronal Disorders and Stroke, National Institute of Health, Bethesda, MD, USA
| | - M T Goswami
- National Institute of Children's Health and Development, National Institute of Health, Bethesda, MD, USA
| | - H C Pant
- National Institute of Neuronal Disorders and Stroke, National Institute of Health, Bethesda, MD, USA
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22
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Kim C, Lee J, Ko YU, Oh YJ. Cyclin-dependent kinase 5-mediated phosphorylation of CHIP promotes the tAIF-dependent death pathway in rotenone-treated cortical neurons. Neurosci Lett 2018; 662:295-301. [PMID: 29111393 DOI: 10.1016/j.neulet.2017.10.053] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 10/21/2017] [Accepted: 10/26/2017] [Indexed: 12/21/2022]
Abstract
Cyclin-dependent kinase 5 (Cdk5) is a proline-directed serine/threonine kinase. Its dysregulation has been implicated in various neurodegenerative diseases. We previously reported that phosphorylation of the C-terminus of the Hsc70-interacting protein (CHIP) by Cdk5 promotes truncated apoptosis-inducing factor (tAIF)-mediated neuronal death induced by oxidative stress. Here, we determined whether this Cdk5-dependent cell death signaling pathway is present in experimental models of Parkinson's disease. First, we showed that rotenone activates Cdk5 in primary cultures of cortical neurons and causes tAIF-dependent neuronal cell death. This event was attenuated by negative regulation of endogenous Cdk5 activity by the pharmacological Cdk5 inhibitor, roscovitine, or by lentiviral knockdown of Cdk5. Cdk5 phosphorylates CHIP at Ser20 in rotenone-treated neurons. Consequently, overexpression of CHIPS20A, but not CHIPWT, attenuates tAIF-induced cell death in rotenone-treated cortical neurons. Taken together, these results indicate that phosphorylation of CHIP at Ser20 by Cdk5 activation inhibits CHIP-mediated tAIF degradation, thereby contributing to tAIF-induced neuronal cell death following rotenone treatment.
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Affiliation(s)
- Chiho Kim
- Department of Systems Biology, Yonsei University College of Life Science and Biotechnology, Seoul 120-749, Republic of Korea; Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Juhyung Lee
- Department of Systems Biology, Yonsei University College of Life Science and Biotechnology, Seoul 120-749, Republic of Korea; Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Yeon Uk Ko
- Department of Systems Biology, Yonsei University College of Life Science and Biotechnology, Seoul 120-749, Republic of Korea
| | - Young J Oh
- Department of Systems Biology, Yonsei University College of Life Science and Biotechnology, Seoul 120-749, Republic of Korea.
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23
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Pokrzywa W, Lorenz R, Hoppe T. Chaperone-directed ubiquitylation maintains proteostasis at the expense of longevity. WORM 2017; 6:e1371403. [PMID: 28959501 PMCID: PMC5612283 DOI: 10.1080/21624054.2017.1371403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 08/18/2017] [Indexed: 11/24/2022]
Abstract
The integrity of the cellular proteome is supported by quality control networks, which govern protein synthesis, folding, and degradation. It is generally accepted that an age-related decline in protein homeostasis (proteostasis) contributes to protein aggregation diseases. However, the mechanistic principles underlying proteostasis imbalance and the impact on life expectancy are not well understood. We recently demonstrated that this interrelation is affected by chaperone-directed ubiquitylation, shifting the amount of the conserved DAF-2/insulin receptor both in Caenorhabditis elegans and Drosophila melanogaster. The ubiquitin ligase CHIP either targets the membrane bound insulin receptor or misfolded proteins for degradation, which depends on the cellular proteostasis status. Increased proteotoxicity triggers chaperone-assisted redirection of CHIP toward protein aggregates, limiting its capacity to degrade the insulin receptor and prevent premature aging. In light of these findings, we discuss a new concept for understanding the impact of proteome imbalance on longevity risk.
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Affiliation(s)
- Wojciech Pokrzywa
- Institute for Genetics and Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany.,International Institute of Molecular and Cell Biology, Warsaw, Poland
| | - Robin Lorenz
- Institute for Genetics and Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Thorsten Hoppe
- Institute for Genetics and Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
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24
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Sarkar S, Brautigan DL, Larner JM. Aurora Kinase A Promotes AR Degradation via the E3 Ligase CHIP. Mol Cancer Res 2017; 15:1063-1072. [PMID: 28536143 DOI: 10.1158/1541-7786.mcr-17-0062] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 04/28/2017] [Accepted: 05/17/2017] [Indexed: 01/08/2023]
Abstract
Reducing the levels of the androgen receptor (AR) is one of the most viable approaches to combat castration-resistant prostate cancer. Previously, we observed that proteasomal-dependent degradation of AR in response to 2-methoxyestradiol (2-ME) depends primarily on the E3 ligase C-terminus of HSP70-interacting protein (STUB1/CHIP). Here, 2-ME stimulation activates CHIP by phosphorylation via Aurora kinase A (AURKA). Aurora A kinase inhibitors and RNAi knockdown of Aurora A transcript selectively blocked CHIP phosphorylation and AR degradation. Aurora A kinase is activated by 2-ME in the S-phase as well as during mitosis, and phosphorylates CHIP at S273. Prostate cancer cells expressing an S273A mutant of CHIP have attenuated AR degradation upon 2-ME treatment compared with cells expressing wild-type CHIP, supporting the idea that CHIP phosphorylation by Aurora A activates its E3 ligase activity for the AR. These results reveal a novel 2-ME→Aurora A→CHIP→AR pathway that promotes AR degradation via the proteasome that may offer novel therapeutic opportunities for prostate cancer. Mol Cancer Res; 15(8); 1063-72. ©2017 AACR.
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Affiliation(s)
- Sukumar Sarkar
- Department of Radiation Oncology, University of Virginia School of Medicine, Charlottesville, Virginia
| | - David L Brautigan
- Center for Cell Signaling, Department of Microbiology, Immunology & Cancer Biology, University of Virginia School of Medicine, Charlottesville, Virginia
| | - James M Larner
- Department of Radiation Oncology, University of Virginia School of Medicine, Charlottesville, Virginia.
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25
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Liu W, Li J, Song YS, Li Y, Jia YH, Zhao HD. Cdk5 links with DNA damage response and cancer. Mol Cancer 2017; 16:60. [PMID: 28288624 PMCID: PMC5348798 DOI: 10.1186/s12943-017-0611-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 02/05/2017] [Indexed: 12/17/2022] Open
Abstract
As an atypical member of cyclin dependent kinase family, Cyclin dependent kinase 5 (Cdk5) is considered as a neuron-specific kinase in the past decade due to the abundant existence of its activator p35 in post-mitotic neurons. Recent studies show that Cdk5 participates in a series of biological and pathological processes in non-neuronal cells, and is generally dysregulated in various cancer cells. The inhibition or knockdown of Cdk5 has been proven to play an anti-cancer role through various mechanisms, and can synergize the killing effect of chemotherapeutics. DNA damage response (DDR) is a series of regulatory events including DNA damage, cell-cycle arrest, regulation of DNA replication, and repair or bypass of DNA damage to ensure the maintenance of genomic stability and cell viability. Here we describe the regulatory mechanisms of Cdk5, its controversial roles in apoptosis and focus on its links to DDR and cancer.
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Affiliation(s)
- Wan Liu
- Department of Breast Surgery, The Second Affiliated Hospital of Dalian Medical University, Zhongshan Road 467, Dalian, 116023, China
| | - Jun Li
- Department of Breast Surgery, The Second Affiliated Hospital of Dalian Medical University, Zhongshan Road 467, Dalian, 116023, China
| | - Yu-Shu Song
- Department of Breast Surgery, The Second Affiliated Hospital of Dalian Medical University, Zhongshan Road 467, Dalian, 116023, China
| | - Yue Li
- Department of Breast Surgery, The Second Affiliated Hospital of Dalian Medical University, Zhongshan Road 467, Dalian, 116023, China
| | - Yu-Hong Jia
- Department of Pathophysiology, Dalian Medical University, Lvshun South Road West 9, Dalian, 116044, China.
| | - Hai-Dong Zhao
- Department of Breast Surgery, The Second Affiliated Hospital of Dalian Medical University, Zhongshan Road 467, Dalian, 116023, China.
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26
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Wang Y, Veremeyko T, Wong AHK, El Fatimy R, Wei Z, Cai W, Krichevsky AM. Downregulation of miR-132/212 impairs S-nitrosylation balance and induces tau phosphorylation in Alzheimer's disease. Neurobiol Aging 2016; 51:156-166. [PMID: 28089352 DOI: 10.1016/j.neurobiolaging.2016.12.015] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 12/16/2016] [Accepted: 12/18/2016] [Indexed: 01/31/2023]
Abstract
MicroRNA-132 is markedly downregulated in Alzheimer's disease (AD) and related tauopathies, and its levels are closely associated with tau pathology in AD. Whether and how miR-132 contributes to pathology in these neurodegenerative diseases remains unclear. Here, we show that miR-132 and its paralogue miR-212 directly regulate the expression of neuronal nitric oxide synthase (NOS1) through the primate-specific binding site. Inhibition of miR-132 in primary human neurons and neural cells leads to increased NOS1 levels and triggers excessive production of nitric oxide, followed by aberrant S-nitrosylation (SNO) of specific proteins associated with neurodegeneration and tau pathology, such as cyclin-dependent kinase 5, dynamin-related protein 1, and glyceraldehyde-3-phosphate dehydrogenase. This, in turn, increases tau phosphorylation at disease associated Ser396, Ser404, and Ser202 sites, and impairs neural viability. Our findings indicate that downregulation of miR-132/212 disturbs the balance of S-nitrosylation and induces tau phosphorylation in a NOS1-dependent way, and thereby may contribute to the pathogenesis of AD and other tauopathies.
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Affiliation(s)
- Yang Wang
- Department of Pediatric Surgery, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China; Department of Neurology, Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Tatiana Veremeyko
- Department of Neurology, Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Andus Hon-Kit Wong
- Department of Neurology, Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Rachid El Fatimy
- Department of Neurology, Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Zhiyun Wei
- Department of Neurology, Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Wei Cai
- Department of Pediatric Surgery, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Anna M Krichevsky
- Department of Neurology, Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
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27
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Joshi V, Amanullah A, Upadhyay A, Mishra R, Kumar A, Mishra A. A Decade of Boon or Burden: What Has the CHIP Ever Done for Cellular Protein Quality Control Mechanism Implicated in Neurodegeneration and Aging? Front Mol Neurosci 2016; 9:93. [PMID: 27757073 PMCID: PMC5047891 DOI: 10.3389/fnmol.2016.00093] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 09/20/2016] [Indexed: 01/13/2023] Open
Abstract
Cells regularly synthesize new proteins to replace old and abnormal proteins for normal cellular functions. Two significant protein quality control pathways inside the cellular milieu are ubiquitin proteasome system (UPS) and autophagy. Autophagy is known for bulk clearance of cytoplasmic aggregated proteins, whereas the specificity of protein degradation by UPS comes from E3 ubiquitin ligases. Few E3 ubiquitin ligases, like C-terminus of Hsc70-interacting protein (CHIP) not only take part in protein quality control pathways, but also plays a key regulatory role in other cellular processes like signaling, development, DNA damage repair, immunity and aging. CHIP targets misfolded proteins for their degradation through proteasome, as well as autophagy; simultaneously, with the help of chaperones, it also regulates folding attempts for misfolded proteins. The broad range of CHIP substrates and their associations with multiple pathologies make it a key molecule to work upon and focus for future therapeutic interventions. E3 ubiquitin ligase CHIP interacts and degrades many protein inclusions formed in neurodegenerative diseases. The presence of CHIP at various nodes of cellular protein-protein interaction network presents this molecule as a potential candidate for further research. In this review, we have explored a wide range of functionality of CHIP inside cells by a detailed presentation of its co-chaperone, E3 and E4 enzyme like functions, with central focus on its protein quality control roles in neurodegenerative diseases. We have also raised many unexplored but expected fundamental questions regarding CHIP functions, which generate hopes for its future applications in research, as well as drug discovery.
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Affiliation(s)
- Vibhuti Joshi
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur Rajasthan, India
| | - Ayeman Amanullah
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur Rajasthan, India
| | - Arun Upadhyay
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur Rajasthan, India
| | - Ribhav Mishra
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur Rajasthan, India
| | - Amit Kumar
- Centre for Biosciences and Biomedical Engineering, Indian Institute of Technology Indore Madhya Pradesh, India
| | - Amit Mishra
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur Rajasthan, India
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