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Upadhyay V, Singh AK, Sharma S, Sethi A, Srivastava S, Chowdhury S, Siddiqui S, Chattopadhyay N, Trivedi AK. RING finger E3 ligase, RNF138 inhibits osteoblast differentiation by negatively regulating Runx2 protein turnover. J Cell Physiol 2024; 239:e31217. [PMID: 38327035 DOI: 10.1002/jcp.31217] [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: 08/28/2023] [Revised: 01/23/2024] [Accepted: 01/27/2024] [Indexed: 02/09/2024]
Abstract
A few ubiquitin ligases have been shown to target Runx2, the key osteogenic transcription factor and thereby regulate bone formation. The regulation of Runx2 expression and function are controlled both at the transcriptional and posttranslational levels. Really interesting new gene (RING) finger ubiquitin ligases of which RNF138 is a member are important players in the ubiquitin-proteasome system, contributing to the regulation of protein turnover and cellular processes. Here, we demonstrated that RNF138 negatively correlated with Runx2 protein levels in osteopenic ovariectomized rats which implied its role in bone loss. Accordingly, RNF138 overexpression potently inhibited osteoblast differentiation of mesenchyme-like C3H10T1/2 as well primary rat calvarial osteoblast (RCO) cells in vitro, whereas overexpression of catalytically inactive mutant RNF138Δ18-58 (lacks RING finger domain) had mild to no effect. Contrarily, RNF138 depletion copiously enhanced endogenous Runx2 levels and augmented osteogenic differentiation of C3H10T1/2 as well as RCOs. Mechanistically, RNF138 physically associates within multiple regions of Runx2 and ubiquitinates it leading to its reduced protein stability in a proteasome-dependent manner. Moreover, catalytically active RNF138 destabilized Runx2 which resulted in inhibition of its transactivation potential and physiological function of promoting osteoblast differentiation leading to bone loss. These findings underscore the functional involvement of RNF138 in bone formation which is primarily achieved through its modulation of Runx2 by stimulating ubiquitin-mediated proteasomal degradation. Thus, our findings indicate that RNF138 could be a promising novel target for therapeutic intervention in postmenopausal osteoporosis.
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Affiliation(s)
- Vishal Upadhyay
- Division of Cancer Biology, CSIR-Central Drug Research Institute, Lucknow, Utter Pradesh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Anil Kumar Singh
- Division of Cancer Biology, CSIR-Central Drug Research Institute, Lucknow, Utter Pradesh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Shivani Sharma
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
- Division of Endocrinology, CSIR-Central Drug Research Institute, Lucknow, Utter Pradesh, India
| | - Arppita Sethi
- Division of Cancer Biology, CSIR-Central Drug Research Institute, Lucknow, Utter Pradesh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Swati Srivastava
- Division of Cancer Biology, CSIR-Central Drug Research Institute, Lucknow, Utter Pradesh, India
| | - Sangita Chowdhury
- Division of Cancer Biology, CSIR-Central Drug Research Institute, Lucknow, Utter Pradesh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Shumaila Siddiqui
- Division of Cancer Biology, CSIR-Central Drug Research Institute, Lucknow, Utter Pradesh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Naibedya Chattopadhyay
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
- Division of Endocrinology, CSIR-Central Drug Research Institute, Lucknow, Utter Pradesh, India
| | - Arun Kumar Trivedi
- Division of Cancer Biology, CSIR-Central Drug Research Institute, Lucknow, Utter Pradesh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
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Park SD, Saunders AS, Reidy MA, Bender DE, Clifton S, Morris KT. A review of granulocyte colony-stimulating factor receptor signaling and regulation with implications for cancer. Front Oncol 2022; 12:932608. [PMID: 36033452 PMCID: PMC9402976 DOI: 10.3389/fonc.2022.932608] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Accepted: 07/15/2022] [Indexed: 12/29/2022] Open
Abstract
Granulocyte colony-stimulating factor receptor (GCSFR) is a critical regulator of granulopoiesis. Studies have shown significant upregulation of GCSFR in a variety of cancers and cell types and have recognized GCSFR as a cytokine receptor capable of influencing both myeloid and non-myeloid immune cells, supporting pro-tumoral actions. This systematic review aims to summarize the available literature examining the mechanisms that control GCSFR signaling, regulation, and surface expression with emphasis on how these mechanisms may be dysregulated in cancer. Experiments with different cancer cell lines from breast cancer, bladder cancer, glioma, and neuroblastoma are used to review the biological function and underlying mechanisms of increased GCSFR expression with emphasis on actions related to tumor proliferation, migration, and metastasis, primarily acting through the JAK/STAT pathway. Evidence is also presented that demonstrates a differential physiological response to aberrant GCSFR signal transduction in different organs. The lifecycle of the receptor is also reviewed to support future work defining how this signaling axis becomes dysregulated in malignancies.
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Affiliation(s)
- Sungjin David Park
- Department of Surgery, University of Oklahoma Health Science Center, Oklahoma City, OK, United States
| | - Apryl S. Saunders
- Department of Surgery, University of Oklahoma Health Science Center, Oklahoma City, OK, United States
| | - Megan A. Reidy
- Department of Surgery, University of Oklahoma Health Science Center, Oklahoma City, OK, United States
| | - Dawn E. Bender
- Department of Surgery, University of Oklahoma Health Science Center, Oklahoma City, OK, United States
| | - Shari Clifton
- Department of Information Management, University of Oklahoma Health Science Center, Oklahoma City, OK, United States
| | - Katherine T. Morris
- Department of Surgery, University of Oklahoma Health Science Center, Oklahoma City, OK, United States
- *Correspondence: Katherine T. Morris,
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Mishra M, Sharma A, Thacker G, Trivedi AK. Nano-LC based proteomic approach identifies that E6AP interacts with ENO1 and targets it for degradation in breast cancer cells. IUBMB Life 2019; 71:1896-1905. [PMID: 31329371 DOI: 10.1002/iub.2132] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 07/01/2019] [Indexed: 12/11/2022]
Abstract
E6AP (E6 associated protein) is a HECT domain containing protein having dual E3 ligase and ERα coactivation activity in breast cancer cells. Although E6AP is known to possess antitumorigenic activity, the underlying molecular mechanism is poorly understood. In the present study, we applied nano-LC based proteomics approach to identify E6AP-interacting proteins where we performed GST-pull down using GST-E6AP from whole cell extracts of MCF7 cells, resolved the differentially interacting proteins on 1D-SDS-PAGE, excised the gel bands that were trypsin digested followed by fractionation and spotting on MALDI-TOF/TOF plate through Nano-LC MALDI spotter. Subsequently, fractionated and spotted peptides were identified using MALDI-TOF/TOF. We identified several E6AP interacting proteins including previously reported such as HSP70 and new ones such as Enolase-1. We further confirmed that E6AP and Enolase1 interacted and colocalized more in the cytoplasmic periphery in breast cancer cells and further demonstrated that E6AP also targeted ENO1 for ubiquitin-mediated degradation in these cells.
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Affiliation(s)
- Mukul Mishra
- Room No. LSS008, Biochemistry Division, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - Akshay Sharma
- Room No. LSS008, Biochemistry Division, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - Gatha Thacker
- Room No. LSS008, Biochemistry Division, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - Arun K Trivedi
- Room No. LSS008, Biochemistry Division, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
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Zhao Y, Zeng Y, Wu A, Yu C, Tang Y, Wang X, Xiong R, Chen H, Wu J, Qin D. Lychee Seed Fraction Inhibits Aβ(1-42)-Induced Neuroinflammation in BV-2 Cells via NF-κB Signaling Pathway. Front Pharmacol 2018; 9:380. [PMID: 29740316 PMCID: PMC5925968 DOI: 10.3389/fphar.2018.00380] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 04/03/2018] [Indexed: 12/13/2022] Open
Abstract
In our previous studies, an active fraction derived from lychee seed could inhibit β-amyloid-induced apoptosis of PC12 cells and neurons. The primarily microglia cells are recognized as the brain’s resident macrophages and thought to remodel of the brain by removing presumably redundant, apoptotic neurons. In the current study, we aimed to investigate the anti-neuroinflammation effect of lychee seed fraction (LSF) in Aβ(1-42)-induced BV-2 cells and the underlying mechanism. The morphology results displayed that LSF could improve the status of Aβ(1-42)-induced BV-2 cells. The enzyme-linked immunosorbent assay, real-time PCR, and Western blotting results showed that LSF could significantly reduce the release, mRNA levels, and protein expressions of the pro-inflammatory cytokines such as interleukin-1β (IL-1β), tumor necrosis factor alpha (TNF-α), cyclooxygenase-2 (COX-2), and inducible nitric oxide synthase (iNOS) in Aβ(1-42)-induced BV-2 cells, which were downregulated through suppressing the NF-κB signaling pathway. Furthermore, LSF could upregulate Bcl-2 and downregulate Bax, Caspase-3, and cleaved-PARP protein expressions. Taken together, our results first demonstrated that LSF could suppress the inflammatory response via inhibiting NF-κB signaling pathway, and inhibit apoptosis in Aβ(1-42)-induced BV-2 cells. Our findings further prove that LSF as a potential drug may be used for treating AD in the future.
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Affiliation(s)
- Ya Zhao
- Laboratory of Chinese Materia Medica, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Yuan Zeng
- Laboratory of Chinese Materia Medica, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China.,Department of Pharmacy, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Anguo Wu
- Laboratory of Chinese Materia Medica, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Chonglin Yu
- Department of Human Anatomy, School of Preclinical Medicine, Southwest Medical University, Luzhou, China
| | - Yong Tang
- Laboratory of Chinese Materia Medica, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Xiuling Wang
- Laboratory of Chinese Materia Medica, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Rui Xiong
- Laboratory of Chinese Materia Medica, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Haixia Chen
- Laboratory of Chinese Materia Medica, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Jianming Wu
- Laboratory of Chinese Materia Medica, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Dalian Qin
- Laboratory of Chinese Materia Medica, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
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