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Li X, Zhuo S, Cho YS, Liu Y, Yang Y, Zhu J, Jiang J. YAP antagonizes TEAD-mediated AR signaling and prostate cancer growth. EMBO J 2023; 42:e112184. [PMID: 36588499 PMCID: PMC9929633 DOI: 10.15252/embj.2022112184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 12/08/2022] [Accepted: 12/09/2022] [Indexed: 01/03/2023] Open
Abstract
Hippo signaling restricts tumor growth by inhibiting the oncogenic potential of YAP/TAZ-TEAD transcriptional complex. Here, we uncover a context-dependent tumor suppressor function of YAP in androgen receptor (AR) positive prostate cancer (PCa) and show that YAP impedes AR+ PCa growth by antagonizing TEAD-mediated AR signaling. TEAD forms a complex with AR to enhance its promoter/enhancer occupancy and transcriptional activity. YAP and AR compete for TEAD binding and consequently, elevated YAP in the nucleus disrupts AR-TEAD interaction and prevents TEAD from promoting AR signaling. Pharmacological inhibition of MST1/2 or LATS1/2, or transgenic activation of YAP suppressed the growth of PCa expressing therapy resistant AR splicing variants. Our study uncovers an unanticipated crosstalk between Hippo and AR signaling pathways, reveals an antagonistic relationship between YAP and TEAD in AR+ PCa, and suggests that targeting the Hippo signaling pathway may provide a therapeutical opportunity to treat PCa driven by therapy resistant AR variants.
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Affiliation(s)
- Xu Li
- Department of Molecular BiologyUniversity of Texas Southwestern Medical CenterDallasTXUSA
| | - Shu Zhuo
- Department of Molecular BiologyUniversity of Texas Southwestern Medical CenterDallasTXUSA
- Center for Cancer Targeted Therapies, Signet Therapeutics Inc.Research Institute of Tsinghua University in ShenzhenShenzhenChina
| | - Yong Suk Cho
- Department of Molecular BiologyUniversity of Texas Southwestern Medical CenterDallasTXUSA
| | - Yuchen Liu
- Department of Developmental BiologyHarvard School of Dental MedicineBostonMAUSA
- Harvard Stem Cell InstituteBostonMAUSA
- Dana‐Farber/Harvard Cancer CenterBostonMAUSA
| | - Yingzi Yang
- Department of Developmental BiologyHarvard School of Dental MedicineBostonMAUSA
- Harvard Stem Cell InstituteBostonMAUSA
- Dana‐Farber/Harvard Cancer CenterBostonMAUSA
| | - Jian Zhu
- Department of Molecular BiologyUniversity of Texas Southwestern Medical CenterDallasTXUSA
- Department of General Surgery, The Second Hospital, Cheeloo College of MedicineShandong UniversityJinanChina
| | - Jin Jiang
- Department of Molecular BiologyUniversity of Texas Southwestern Medical CenterDallasTXUSA
- Department of PharmacologyUniversity of Texas Southwestern Medical CenterDallasTXUSA
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2
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Li Z, Su P, Ding Y, Gao H, Yang H, Li X, Yang X, Xia Y, Zhang C, Fu M, Wang D, Zhang Y, Zhuo S, Zhu J, Zhuang T. RBCK1 is an endogenous inhibitor for triple negative breast cancer via hippo/YAP axis. Cell Commun Signal 2022; 20:164. [PMID: 36280829 PMCID: PMC9590148 DOI: 10.1186/s12964-022-00963-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 08/17/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Triple negative breast cancer (TNBC) is one of the most lethal breast cancer subtypes. Due to a lack of effective therapeutic targets, chemotherapy is still the main medical treatment for TNBC patients. Thus, it is important and necessary to find new therapeutic targets for TNBC. Recent genomic studies implicated the Hippo / Yap signal is over activated in TNBC, manifesting it plays a key role in TNBC carcinogenesis and cancer progression. RBCK1 was firstly identified as an important component for linear ubiquitin assembly complex (LUBAC) and facilitates NFKB signaling in immune response. Further studies showed RBCK1 also facilitated luminal type breast cancer growth and endocrine resistance via trans-activation estrogen receptor alpha. METHODS RBCK1 and YAP protein expression levels were measured by western blotting, while the mRNA levels of YAP target genes were measured by RT-PCR. RNA sequencing data were analyzed by Ingenuity Pathway Analysis. Identification of Hippo signaling activity was accomplished with luciferase assays, RT-PCR and western blotting. Protein stability assays and ubiquitin assays were used to detect YAP protein degradation. Ubiquitin-based immunoprecipitation assays were used to detect the specific ubiquitination modification on the YAP protein. RESULTS In our current study, our data revealed an opposite function for RBCK1 in TNBC progression. RBCK1 over-expression inhibited TNBC cell progression in vitro and in vivo, while RBCK1 depletion promoted TNBC cell invasion. The whole genomic expression profiling showed that RBCK1 depletion activated Hippo/YAP axis. RBCK1 depletion increased YAP protein level and Hippo target gene expression in TNBC. The molecular biology studies confirmed that RBCK1 could bind to YAP protein and enhance the stability of YAP protein by promoting YAP K48-linked poly-ubiquitination at several YAP lysine sites (K76, K204 and K321). CONCLUSION Our study revealed the multi-faced RBCK1 function in different subtypes of breast cancer patients and a promising therapeutic target for TNBC treatment. Video abstract.
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Affiliation(s)
- Zhongbo Li
- grid.412990.70000 0004 1808 322XXinxiang Key Laboratory of Tumor Migration and Invasion Precision Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, 453003 Henan Province People’s Republic of China
| | - Peng Su
- grid.27255.370000 0004 1761 1174Department of Pathology, Shandong University Qilu Hospital, Cheeloo College of Medicine, Shandong University, Shandong, Shandong Province People’s Republic of China
| | - Yinlu Ding
- grid.27255.370000 0004 1761 1174Department of General Surgery, The Second Hospital, Cheeloo College of Medicine, Shandong University, Shandong, Shandong Province People’s Republic of China
| | - Honglei Gao
- grid.416966.a0000 0004 1758 1470Department of General Surgery, Weifang People’s Hospital, Shandong, Shandong Province People’s Republic of China
| | - Huijie Yang
- grid.412990.70000 0004 1808 322XXinxiang Key Laboratory of Tumor Migration and Invasion Precision Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, 453003 Henan Province People’s Republic of China
| | - Xin Li
- grid.412990.70000 0004 1808 322XXinxiang Key Laboratory of Tumor Migration and Invasion Precision Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, 453003 Henan Province People’s Republic of China
| | - Xiao Yang
- grid.412990.70000 0004 1808 322XXinxiang Key Laboratory of Tumor Migration and Invasion Precision Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, 453003 Henan Province People’s Republic of China
| | - Yan Xia
- grid.412990.70000 0004 1808 322XXinxiang Key Laboratory of Tumor Migration and Invasion Precision Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, 453003 Henan Province People’s Republic of China
| | - Chenmiao Zhang
- grid.412990.70000 0004 1808 322XXinxiang Key Laboratory of Tumor Migration and Invasion Precision Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, 453003 Henan Province People’s Republic of China
| | - Mingxi Fu
- grid.412990.70000 0004 1808 322XXinxiang Key Laboratory of Tumor Migration and Invasion Precision Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, 453003 Henan Province People’s Republic of China
| | - Dehai Wang
- grid.27255.370000 0004 1761 1174Department of General Surgery, The Second Hospital, Cheeloo College of Medicine, Shandong University, Shandong, Shandong Province People’s Republic of China
| | - Ye Zhang
- grid.412990.70000 0004 1808 322XXinxiang Key Laboratory of Tumor Migration and Invasion Precision Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, 453003 Henan Province People’s Republic of China
| | - Shu Zhuo
- Signet Therapeutics Inc., Shenzhen, 518017 People’s Republic of China
| | - Jian Zhu
- grid.412990.70000 0004 1808 322XXinxiang Key Laboratory of Tumor Migration and Invasion Precision Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, 453003 Henan Province People’s Republic of China ,grid.27255.370000 0004 1761 1174Department of General Surgery, The Second Hospital, Cheeloo College of Medicine, Shandong University, Shandong, Shandong Province People’s Republic of China
| | - Ting Zhuang
- grid.412990.70000 0004 1808 322XXinxiang Key Laboratory of Tumor Migration and Invasion Precision Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, 453003 Henan Province People’s Republic of China
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3
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Li X, Cho YS, Zhu J, Zhuo S, Jiang J. The Hippo pathway effector YAP inhibits HIF2 signaling and ccRCC tumor growth. Cell Discov 2022; 8:103. [PMID: 36202785 PMCID: PMC9537283 DOI: 10.1038/s41421-022-00465-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 08/29/2022] [Indexed: 12/04/2022] Open
Affiliation(s)
- Xu Li
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Yong Suk Cho
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Jian Zhu
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA.,Department of General Surgery, Central Hospital Affiliated to Shandong First Medical University, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Shu Zhuo
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA. .,Signet Therapeutics Inc, Research Institute of Tsinghua University in Shenzhen, Shenzhen, Guangdong, China.
| | - Jin Jiang
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA. .,Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, TX, USA.
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4
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Kaniga K, Lounis N, Zhuo S, Bakare N, Andries K. Impact of Rv0678 mutations on patients with drug-resistant TB treated with bedaquiline. Int J Tuberc Lung Dis 2022; 26:571-573. [PMID: 35650698 PMCID: PMC9165736 DOI: 10.5588/ijtld.21.0670] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Affiliation(s)
- K Kaniga
- Johnson & Johnson Global Public Health, Titusville, NJ, USA
| | - N Lounis
- Janssen Pharmaceutica, Beerse, Belgium
| | - S Zhuo
- Janssen Research & Development, Titusville, NJ, USA, IQVIA, Durham, NC, USA
| | - N Bakare
- Janssen Research & Development, Titusville, NJ, USA
| | - K Andries
- Janssen Pharmaceutica, Beerse, Belgium
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5
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Liu Y, Zhuo S, Zhou Y, Ma L, Sun Z, Wu X, Wang XW, Gao B, Yang Y. Yap-Sox9 signaling determines hepatocyte plasticity and lineage-specific hepatocarcinogenesis. J Hepatol 2022; 76:652-664. [PMID: 34793870 PMCID: PMC8858854 DOI: 10.1016/j.jhep.2021.11.010] [Citation(s) in RCA: 41] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 10/14/2021] [Accepted: 11/04/2021] [Indexed: 12/29/2022]
Abstract
BACKGROUND & AIMS Primary liver tumors comprise distinct subtypes. A subset of intrahepatic cholangiocarcinoma (iCCA) can arise from cell fate reprogramming of mature hepatocytes in mouse models. However, the underpinning of cell fate plasticity during hepatocarcinogenesis is still poorly understood, hampering therapeutic development for primary liver cancer. As YAP activation induces liver tumor formation and cell fate plasticity, we investigated the role of Sox9, a transcription factor downstream of Yap activation that is expressed in biliary epithelial cells (BECs), in Yap-induced cell fate plasticity during hepatocarcinogenesis. METHODS To evaluate the function of Sox9 in YAP-induced hepatocarcinogenesis in vivo, we used several genetic mouse models of inducible hepatocyte-specific YAP activation with simultaneous Sox9 removal. Cell fate reprogramming was determined by lineage tracing and immunohistochemistry. The molecular mechanism underlying Yap and Sox9 function in hepatocyte plasticity was investigated by transcription and transcriptomic analyses of mouse and human liver tumors. RESULTS Sox9, a marker of liver progenitor cells (LPCs) and BECs, is differentially required in YAP-induced stepwise hepatocyte programming. While Sox9 has a limited role in hepatocyte dedifferentiation to LPCs, it is required for BEC differentiation from LPCs. YAP activation in Sox9-deficient hepatocytes resulted in more aggressive HCC with enhanced Yap activity at the expense of iCCA-like tumors. Furthermore, we showed that 20% of primary human liver tumors were associated with a YAP activation signature, and tumor plasticity is highly correlated with YAP activation and SOX9 expression. CONCLUSION Our data demonstrated that Yap-Sox9 signaling determines hepatocyte plasticity and tumor heterogeneity in hepatocarcinogenesis in both mouse and human liver tumors. We identified Sox9 as a critical transcription factor required for Yap-induced hepatocyte cell fate reprogramming during hepatocarcinogenesis. LAY SUMMARY Sox9, a marker of liver progenitor cells and bile duct lining cells, is a downstream target of YAP protein activation. Herein, we found that YAP activation in hepatocytes leads to a transition from mature hepatocytes to liver progenitor cells and then to bile duct lining cells. Sox9 is required in the second step during mouse hepatocarcinogenesis. We also found that human YAP and SOX9 may play similar roles in liver cancers.
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Affiliation(s)
- Yuchen Liu
- Department of Developmental Biology, Harvard School of Dental Medicine, 188 Longwood Ave. Boston, MA 02115
| | - Shu Zhuo
- Department of Developmental Biology, Harvard School of Dental Medicine, 188 Longwood Ave. Boston, MA 02115
| | - Yaxing Zhou
- Department of Developmental Biology, Harvard School of Dental Medicine, 188 Longwood Ave. Boston, MA 02115
| | - Lichun Ma
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, MD 20892
| | - Zhonghe Sun
- Cancer Research Technology Program, Frederick National Laboratory for Cancer, Leidos Biomedical Research, Inc., Frederick, MD, 21702
| | - Xiaolin Wu
- Cancer Research Technology Program, Frederick National Laboratory for Cancer, Leidos Biomedical Research, Inc., Frederick, MD, 21702
| | - Xin Wei Wang
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, MD 20892
| | - Bin Gao
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism; National Institutes of Health, 5625 Fishers Lane, Room 2S-33, Bethesda, MD 20892
| | - Yingzi Yang
- Department of Developmental Biology, Harvard School of Dental Medicine, 188 Longwood Ave. Boston, MA 02115, USA; Harvard Stem Cell Institute, Dana-Farber/Harvard Cancer Center, 188 Longwood Ave. Boston, MA 02115, USA; Program in Gastrointestinal Malignancies, Dana-Farber/Harvard Cancer Center, 188 Longwood Ave. Boston, MA 02115, USA.
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6
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Li X, Niu Z, Sun C, Zhuo S, Yang H, Yang X, Liu Y, Yan C, Li Z, Cao Q, Ji G, Ding Y, Zhuang T, Zhu J. Regulation of P53 signaling in breast cancer by the E3 ubiquitin ligase RNF187. Cell Death Dis 2022; 13:149. [PMID: 35165289 PMCID: PMC8844070 DOI: 10.1038/s41419-022-04604-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 01/19/2022] [Accepted: 02/01/2022] [Indexed: 01/15/2023]
Abstract
The tumor suppressor P53 plays critical role in preventing cancer. P53 is rarely mutated and remains functional in luminal-type breast cancer(1). According to current knowledge, wild-type P53 function is tightly controlled by posttranslational modifications, such as ubiquitination. Several ubiquitin ligases have been shown to regulate P53 ubiquitination and protein stability. Here, we report that RNF187, a RING family ubiquitin ligase, facilitates breast cancer growth and inhibits apoptosis by modulating P53 signaling. RNF187 expression was elevated in breast cancer and correlated with breast cancer survival only in the P53 wild-type groups. Bioinformatic analysis showed that the expression of RNF187 was negatively correlated with the expression of P53 target genes, such as IGFBP3 and FAS, in breast cancer. RNF187 depletion inhibited breast cancer growth and facilitated cell death. RNA sequencing analysis indicated that RNF187 could be an important modulator of P53 signaling. Further experiments showed that RNF187 interacts with P53 and promotes its degradation by facilitating its polyubiquitination in breast cancer cells. Interestingly, the in vitro ubiquitin assay showed that RNF187 can directly ubiquitinate P53 in a manner independent of MDM2. These findings reveal a novel direct P53 regulator and a potential therapeutic target for breast cancer.
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7
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Yang B, Jia Y, Meng Y, Xue Y, Liu K, Li Y, Liu S, Li X, Cui K, Shang L, Cheng T, Zhang Z, Hou Y, Yang X, Yan H, Duan L, Tong Z, Wu C, Liu Z, Gao S, Zhuo S, Huang W, Gao GF, Qi J, Shang G. SNX27 suppresses SARS-CoV-2 infection by inhibiting viral lysosome/late endosome entry. Proc Natl Acad Sci U S A 2022; 119:e2117576119. [PMID: 35022217 PMCID: PMC8794821 DOI: 10.1073/pnas.2117576119] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Accepted: 12/08/2021] [Indexed: 12/28/2022] Open
Abstract
After binding to its cell surface receptor angiotensin converting enzyme 2 (ACE2), severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) enters the host cell through directly fusing with plasma membrane (cell surface pathway) or undergoing endocytosis traveling to lysosome/late endosome for membrane fusion (endocytic pathway). However, the endocytic entry regulation by host cell remains elusive. Recent studies show ACE2 possesses a type I PDZ binding motif (PBM) through which it could interact with a PDZ domain-containing protein such as sorting nexin 27 (SNX27). In this study, we determined the ACE2-PBM/SNX27-PDZ complex structure, and, through a series of functional analyses, we found SNX27 plays an important role in regulating the homeostasis of ACE2 receptor. More importantly, we demonstrated SNX27, together with retromer complex (the core component of the endosomal protein sorting machinery), prevents ACE2/virus complex from entering lysosome/late endosome, resulting in decreased viral entry in cells where the endocytic pathway dominates. The ACE2/virus retrieval mediated by SNX27-retromer could be considered as a countermeasure against invasion of ACE2 receptor-using SARS coronaviruses.
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Affiliation(s)
- Bo Yang
- Shanxi Academy of Advanced Research and Innovation, Taiyuan 030032, China
- Shanxi Provincial Key Laboratory for Major Infectious Disease Response, Taiyuan 030012, China
| | - Yuanyuan Jia
- Shanxi Academy of Advanced Research and Innovation, Taiyuan 030032, China
| | - Yumin Meng
- Chinese Academy of Sciences Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Ying Xue
- Shanxi Academy of Advanced Research and Innovation, Taiyuan 030032, China
| | - Kefang Liu
- Chinese Academy of Sciences Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yan Li
- Chinese Academy of Sciences Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Shichao Liu
- Shanxi Academy of Advanced Research and Innovation, Taiyuan 030032, China
| | - Xiaoxiong Li
- Shanxi Academy of Advanced Research and Innovation, Taiyuan 030032, China
| | - Kaige Cui
- Shanxi Academy of Advanced Research and Innovation, Taiyuan 030032, China
| | - Lina Shang
- Shanxi Academy of Advanced Research and Innovation, Taiyuan 030032, China
| | - Tianyou Cheng
- Shanxi Academy of Advanced Research and Innovation, Taiyuan 030032, China
| | - Zhichao Zhang
- Shanxi Academy of Advanced Research and Innovation, Taiyuan 030032, China
| | - Yingxiang Hou
- Shanxi Academy of Advanced Research and Innovation, Taiyuan 030032, China
- Institutes of Biomedical Sciences, Shanxi University, Taiyuan 030006, China
| | - Xiaozhu Yang
- Shanxi Academy of Advanced Research and Innovation, Taiyuan 030032, China
| | - Hong Yan
- Shanxi Academy of Advanced Research and Innovation, Taiyuan 030032, China
| | - Liqiang Duan
- Shanxi Academy of Advanced Research and Innovation, Taiyuan 030032, China
| | - Zhou Tong
- Shanxi Academy of Advanced Research and Innovation, Taiyuan 030032, China
- Chinese Academy of Sciences Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Changxin Wu
- Shanxi Academy of Advanced Research and Innovation, Taiyuan 030032, China
- Institutes of Biomedical Sciences, Shanxi University, Taiyuan 030006, China
| | - Zhida Liu
- Shanxi Academy of Advanced Research and Innovation, Taiyuan 030032, China
| | - Shan Gao
- Shanxi Academy of Advanced Research and Innovation, Taiyuan 030032, China
| | - Shu Zhuo
- Signet Therapeutics Inc, Shenzhen 518000, China
| | - Weijin Huang
- Division of HIV/AIDS and Sex-Transmitted Virus Vaccines, National Institutes for Food and Drug Control, Beijing 102629, China
| | - George Fu Gao
- Shanxi Academy of Advanced Research and Innovation, Taiyuan 030032, China;
- Chinese Academy of Sciences Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jianxun Qi
- Chinese Academy of Sciences Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China;
| | - Guijun Shang
- Shanxi Academy of Advanced Research and Innovation, Taiyuan 030032, China;
- Shanxi Provincial Key Laboratory for Major Infectious Disease Response, Taiyuan 030012, China
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8
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Niu Z, Li X, Dong S, Gao J, Huang Q, Yang H, Qian H, Zhuo S, Zhuang T, Zhu J, Ding Y, Xu W. The E3 Ubiquitin Ligase HOIP inhibits Cancer Cell Apoptosis via modulating PTEN stability. J Cancer 2021; 12:6553-6562. [PMID: 34659546 PMCID: PMC8489130 DOI: 10.7150/jca.61996] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Accepted: 08/30/2021] [Indexed: 11/22/2022] Open
Abstract
Chemotherapy is widely used in a variety of solid tumors, such as lung cancer, gastric cancer and breast cancer. The genotoxic drugs, such as cisplatin, suppress cancer progression either by inhibition cell proliferation or facilitating apoptosis. However, the chemotherapy resistance remains an urgent challenge in cancer therapy, especially in advanced stages. Several studies showed that the activation of pro-survival pathways, such as PI3K-AKT, participated in mediating chemotherapy resistance. The insights into the molecular mechanisms for underlying chemotherapy resistance are of great importance to improve cancer patient survival in advanced stages. The HOIP protein belongs to the RING family E3 ubiquitin ligases and modulates several atypical ubiquitination processes in cellular signaling. Previous studies showed that HOIP might be an important effector in modulating cancer cell death under genotoxic drugs. Here, we report that HOIP associates with PTEN and facilitates PTEN degradation in cancer cells. Depletion of HOIP causes cell cycle arrest and apoptosis, which effects could be rescued by PTEN silencing. Besides, the survival data from public available database show that HOIP expression correlates with poor survival in several types of chemotherapy-treated cancer patients. In conclusion, our study establishes a novel mechanism by which HOIP modulates PTEN stability and facilitates chemotherapy resistance in malignancies.
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Affiliation(s)
- Zhiguo Niu
- Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, 212000, China.,Henan Key Laboratory of Immunology and Targeted Drugs, School of Laboratory Medicine, Xinxiang Medical University, 453000, China
| | - Xin Li
- Henan Key Laboratory of Immunology and Targeted Drugs, School of Laboratory Medicine, Xinxiang Medical University, 453000, China
| | - Shuxiao Dong
- Department of Gastroenterology surgery, Shandong Provincial Third Hospital, Jinan, 250000, China
| | - Jianhui Gao
- Henan Key Laboratory of Immunology and Targeted Drugs, School of Laboratory Medicine, Xinxiang Medical University, 453000, China
| | - Qingsong Huang
- Henan Key Laboratory of Immunology and Targeted Drugs, School of Laboratory Medicine, Xinxiang Medical University, 453000, China
| | - Huijie Yang
- Henan Key Laboratory of Immunology and Targeted Drugs, School of Laboratory Medicine, Xinxiang Medical University, 453000, China
| | - Hui Qian
- Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, 212000, China
| | - Shu Zhuo
- Signet Therapeutics Inc, Shenzhen, China. Research Institute of Tsinghua University in Shenzhen, Shenzhen, 518000, China
| | - Ting Zhuang
- Henan Key Laboratory of Immunology and Targeted Drugs, School of Laboratory Medicine, Xinxiang Medical University, 453000, China
| | - Jian Zhu
- Henan Key Laboratory of Immunology and Targeted Drugs, School of Laboratory Medicine, Xinxiang Medical University, 453000, China.,Department of general surgery, the Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250033, China
| | - Yinlu Ding
- Department of general surgery, the Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250033, China
| | - Wenrong Xu
- Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, 212000, China
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9
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Moodliar R, Aksenova V, Frias MVG, van de Logt J, Rossenu S, Birmingham E, Zhuo S, Mao G, Lounis N, Kambili C, Bakare N. Bedaquiline for multidrug-resistant TB in paediatric patients. Int J Tuberc Lung Dis 2021; 25:716-724. [PMID: 34802493 PMCID: PMC8412106 DOI: 10.5588/ijtld.21.0022] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND: TMC207-C211 (NCT02354014) is a Phase 2, open-label, multicentre, single-arm study to evaluate pharmacokinetics, safety/tolerability, antimycobacterial activity and dose selection of bedaquiline (BDQ) in children (birth to <18 years) with multidrug-resistant-TB (MDR-TB). METHODS: Patients received 24 weeks’ BDQ with an anti-MDR-TB background regimen (BR), followed by 96 weeks of safety follow-up. Results of the primary analysis are presented based on data up to 24 weeks for Cohort 1 (≥12–<18 years; approved adult tablet at the adult dosage) and Cohort 2 (≥5–<12 years; age-appropriate 20 mg tablet at half the adult dosage). RESULTS: Both cohorts had 15 patients, of whom respectively 53% and 40% of Cohort 1 and Cohort 2 children had confirmed/probable pulmonary MDR-TB. Most patients completed 24 weeks’ BDQ/BR treatment (Cohort 1: 93%; Cohort 2: 67%). Geometric mean BDQ area under the curve 168h values of 119,000 ng.h/mL (Cohort 1) and 118,000 ng.h/mL (Cohort 2) at Week 12 were within 60–140% (86,200–201,000 ng.h/mL) of adult target values. Few adverse event (AE) related discontinuations or serious AEs, andnoQTcF >460 ms during BDQ/BR treatment or deaths occurred. Of MGIT-evaluable patients, 6/8 (75%) Cohort 1 and 3/3 (100%) Cohort 2 culture converted. CONCLUSION: In children and adolescents aged ≥5–<18 years with MDR-TB, including pre-extensively drug-resistant-TB (pre-XDR-TB) or XDR-TB, 24 weeks of BDQ provided a comparable pharmacokinetic and safety profile to adults.
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Affiliation(s)
- R Moodliar
- Tuberculosis and HIV Investigative Network, King Dinuzulu Hospital, Sydenham, Durban, South Africa
| | - V Aksenova
- National Medical Research Center for Phthisiopulmonology and Infectious Diseases, Moscow, Russian Federation
| | - M V G Frias
- De La Salle Health Sciences Institute, Dasmariñas City, Cavite, the Philippines
| | - J van de Logt
- Janssen Research & Development, Leiden, The Netherlands
| | - S Rossenu
- Janssen Pharmaceutica, Beerse, Belgium
| | | | - S Zhuo
- Janssen Research & Development, Titusville, NJ, IQVIA, NC
| | - G Mao
- Janssen Research & Development, Titusville, NJ
| | - N Lounis
- Janssen Pharmaceutica, Beerse, Belgium
| | - C Kambili
- Johnson & Johnson Global Public Health, New Brunswick, NJ, USA
| | - N Bakare
- Janssen Research & Development, Titusville, NJ
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10
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Zhu T, Zhao J, Zhuo S, Hu Z, Ouyang S, Wunier, Yu S, Chen Y, Li Y, Le Y. High Fat Diet and High Cholesterol Diet Reduce Hepatic Vitamin D-25-Hydroxylase Expression and Serum 25-Hydroxyvitamin D 3 Level through Elevating Circulating Cholesterol, Glucose, and Insulin Levels. Mol Nutr Food Res 2021; 65:e2100220. [PMID: 34448353 DOI: 10.1002/mnfr.202100220] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 08/04/2021] [Indexed: 12/20/2022]
Abstract
SCOPE Low circulating 25-hydroxyvitamin D (25(OH)D) levels associate with obesity, diabetes, and hyperlipidemia, but the underlying mechanisms remain uncertain. As energy-dense diet contributes to these disorders, this study investigates whether diet could impair vitamin D metabolism. METHODS AND RESULTS Compared with control chow-fed mice, high fat diet (HFD)-fed mice show lower serum 25(OH)D3 and 1,25(OH)2 D3 levels, lower hepatic vitamin D 25-hydroxylase Cyp2r1 expression but comparable renal vitamin D metabolic enzymes expression. Time course studies show that after HFD feeding, the serum concentrations of cholesterol, triglycerides, fatty acids, glucose, and insulin elevate sequentially and before the reduction of hepatic Cyp2r1 expression and serum 25(OH)D3 levels. Hepatic Cyp2r1 expression also reduces after consuming high fat and high sucrose diet. After high cholesterol diet feeding, serum total cholesterol rises and hepatic Cyp2r1 expression decreases ahead of the reduction of serum 25(OH)D3 . In vitro studies demonstrate that high concentrations of cholesterol, glucose, and insulin significantly inhibit Cyp2r1expression in primary murine hepatocytes. Further studies show that dietary restriction in HFD-fed mice ameliorates hypercholesterolemia, hyperglycemia, and hypertriglyceridemia, and elevates hepatic Cyp2r1 expression and serum 25(OH)D3 level. CONCLUSION These findings suggest that diet-induced elevation of circulating cholesterol, glucose, and insulin reduces serum 25(OH)D3 level through suppressing hepatic Cyp2r1 expression.
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Affiliation(s)
- Tengfei Zhu
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, China.,School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Jingyu Zhao
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Shu Zhuo
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Zhimin Hu
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Shuyu Ouyang
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Wunier
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Shuting Yu
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Yan Chen
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Yu Li
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Yingying Le
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, China.,Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing, 100021, China
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11
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Cho YS, Li S, Wang X, Zhu J, Zhuo S, Han Y, Yue T, Yang Y, Jiang J. CDK7 regulates organ size and tumor growth by safeguarding the Hippo pathway effector Yki/Yap/Taz in the nucleus. Genes Dev 2019; 34:53-71. [PMID: 31857346 PMCID: PMC6938674 DOI: 10.1101/gad.333146.119] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 11/25/2019] [Indexed: 01/09/2023]
Abstract
Hippo signaling controls organ size and tumor progression through a conserved pathway leading to nuclear translocation of the transcriptional effector Yki/Yap/Taz. Most of our understanding of Hippo signaling pertains to its cytoplasmic regulation, but how the pathway is controlled in the nucleus remains poorly understood. Here we uncover an evolutionarily conserved mechanism by which CDK7 promotes Yki/Yap/Taz stabilization in the nucleus to sustain Hippo pathway outputs. We found that a modular E3 ubiquitin ligase complex CRL4DCAF12 binds and targets Yki/Yap/Taz for ubiquitination and degradation, whereas CDK7 phosphorylates Yki/Yap/Taz at S169/S128/S90 to inhibit CRL4DCAF12 recruitment, leading to Yki/Yap/Taz stabilization. As a consequence, inactivation of CDK7 reduced organ size and inhibited tumor growth, which could be reversed by restoring Yki/Yap activity. Our study identifies an unanticipated layer of Hippo pathway regulation, defines a novel mechanism by which CDK7 regulates tissue growth, and implies CDK7 as a drug target for Yap/Taz-driven cancer.
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Affiliation(s)
- Yong Suk Cho
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Shuang Li
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Xiaohui Wang
- Department of Developmental Biology, Harvard School of Dental Medicine, Boston, Massachusetts 02215, USA.,Harvard Stem Cell Institute, Boston, Massachusetts 02215, USA
| | - Jian Zhu
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Shu Zhuo
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Yuhong Han
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Tao Yue
- Center for the Genetics and Host Defense, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Yingzi Yang
- Department of Developmental Biology, Harvard School of Dental Medicine, Boston, Massachusetts 02215, USA.,Harvard Stem Cell Institute, Boston, Massachusetts 02215, USA
| | - Jin Jiang
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.,Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
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12
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Dai C, Wang X, Wu Y, Xu Y, Zhuo S, Qi M, Ji W, Zhan L. Polarity Protein AF6 Controls Hepatic Glucose Homeostasis and Insulin Sensitivity by Modulating IRS1/AKT Insulin Pathway in an SHP2-Dependent Manner. Diabetes 2019; 68:1577-1590. [PMID: 31127058 DOI: 10.2337/db18-0695] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 05/21/2019] [Indexed: 11/13/2022]
Abstract
Insulin resistance is a major contributing factor in the development of metabolic disease. Although numerous functions of the polarity protein AF6 (afadin and MLLT4) have been identified, a direct effect on insulin sensitivity has not been previously described. We show that AF6 is elevated in the liver tissues of dietary and genetic mouse models of diabetes. We generated liver-specific AF6 knockout mice and show that these animals exhibit enhanced insulin sensitivity and liver glycogen storage, whereas overexpression of AF6 in wild-type mice by adenovirus-expressing AF6 led to the opposite phenotype. Similar observations were obtained from in vitro studies. In addition, we discovered that AF6 directly regulates IRS1/AKT kinase-mediated insulin signaling through its interaction with Src homology 2 domain-containing phosphatase 2 (SHP2) and its regulation of SHP2's tyrosine phosphatase activity. Finally, we show that knockdown of hepatic AF6 ameliorates hyperglycemia and insulin resistance in high-fat diet-fed or db/db diabetic mice. These results demonstrate a novel function for hepatic AF6 in the regulation of insulin sensitivity, providing important insights about the metabolic role of AF6.
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Affiliation(s)
- Cheng Dai
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Xinyu Wang
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Yanjun Wu
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Yi Xu
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Shu Zhuo
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Meiyan Qi
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Weiwei Ji
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Lixing Zhan
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
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13
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Chen X, Zhuo S, Zhu T, Yao P, Yang M, Mei H, Li N, Ma F, Wang JM, Chen S, Ye RD, Li Y, Le Y. Fpr2 Deficiency Alleviates Diet-Induced Insulin Resistance Through Reducing Body Weight Gain and Inhibiting Inflammation Mediated by Macrophage Chemotaxis and M1 Polarization. Diabetes 2019; 68:1130-1142. [PMID: 30862681 PMCID: PMC6905484 DOI: 10.2337/db18-0469] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 02/17/2019] [Indexed: 12/15/2022]
Abstract
Obesity and related inflammation are critical for the pathogenesis of insulin resistance, but the underlying mechanisms are not fully understood. Formyl peptide receptor 2 (FPR2) plays important roles in host immune responses and inflammation-related diseases. We found that Fpr2 expression was elevated in the white adipose tissue of high-fat diet (HFD)-induced obese mice and db/db mice. The systemic deletion of Fpr2 alleviated HFD-induced obesity, insulin resistance, hyperglycemia, hyperlipidemia, and hepatic steatosis. Furthermore, Fpr2 deletion in HFD-fed mice elevated body temperature, reduced fat mass, and inhibited inflammation by reducing macrophage infiltration and M1 polarization in metabolic tissues. Bone marrow transplantations between wild-type and Fpr2-/- mice and myeloid-specific Fpr2 deletion demonstrated that Fpr2-expressing myeloid cells exacerbated HFD-induced obesity, insulin resistance, glucose/lipid metabolic disturbances, and inflammation. Mechanistic studies revealed that Fpr2 deletion in HFD-fed mice enhanced energy expenditure probably through increasing thermogenesis in skeletal muscle; serum amyloid A3 and other factors secreted by adipocytes induced macrophage chemotaxis via Fpr2; and Fpr2 deletion suppressed macrophage chemotaxis and lipopolysaccharide-, palmitate-, and interferon-γ-induced macrophage M1 polarization through blocking their signals. Altogether, our studies demonstrate that myeloid Fpr2 plays critical roles in obesity and related metabolic disorders via regulating muscle energy expenditure, macrophage chemotaxis, and M1 polarization.
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Affiliation(s)
- Xiaofang Chen
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Shu Zhuo
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Tengfei Zhu
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Pengle Yao
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Mengmei Yang
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Hong Mei
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Na Li
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Fengguang Ma
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Ji Ming Wang
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD
| | - Shiting Chen
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Richard D Ye
- Institute of Chinese Medical Sciences, University of Macau, Macau Special Administrative Region, China
| | - Yu Li
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Yingying Le
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
- Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing, China
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14
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Li N, Wang T, Li Z, Ye X, Deng B, Zhuo S, Yao P, Yang M, Mei H, Chen X, Zhu T, Chen S, Wang H, Wang J, Le Y. Dorsomorphin induces cancer cell apoptosis and sensitizes cancer cells to HSP90 and proteasome inhibitors by reducing nuclear heat shock factor 1 levels. Cancer Biol Med 2019; 16:220-233. [PMID: 31516744 PMCID: PMC6713636 DOI: 10.20892/j.issn.2095-3941.2018.0235] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Objective Heat shock factor 1 (HSF1), a transcriptional regulator of heat shock proteins (HSPs), is an attractive therapeutic target for cancer. However, only a few HSF1 inhibitors have been identified so far. Methods The mRNA and protein levels of HSF1, HSPs, cleaved PARP, and phosphorylated HSF1 were examined by real-time PCR and Western blot. Forced expression, RNA interference, and immunofluorescence assay were used for mechanistic studies. Cell viability and apoptosis were measured by WST-8 assay and flow cytometry, respectively. Xenograft studies were performed in nude mice to evaluate the effect of dorsomorphin and an HSP90 inhibitor on tumor growth. Results Dorsomorphin suppressed multiple stimuli-induced and constitutive HSPs expression in cancer cells. Mechanistic studies revealed that dorsomorphin reduced heat-induced HSP expression independent of adenosine monophosphate activated protein kinase. Dorsomorphin reduced heat-stimulated HSF1 Ser320 phosphorylation and nuclear translocation, as well as resting nuclear HSF1 levels in cancer cells. Dorsomorphin induced cancer cell apoptosis by inhibiting HSF1 expression. A structure-activity study revealed that the 4-pyridyl at the 3-site of the pyrazolo [1, 5-a]pyrimidine ring is critical for the anti-HSF1 activities of dorsomorphin. Dorsomorphin sensitized cancer cells to HSP90 and proteasome inhibitors and inhibited HSP70 expression induced by these inhibitors in vitro. In tumor-bearing nude mice, dorsomorphin enhanced HSP90 inhibitor-induced cancer cell apoptosis, tumor growth inhibition, and HSP70 expression.
Conclusions Dorsomorphin is an HSF1 inhibitor. It induces cancer cell apoptosis, sensitizes cancer cells to both HSP90 and proteasome inhibitors, and suppresses HSP upregulation by these drugs, which may prevent the development of drug resistance. Hence, dorsomorphin and its derivates may serve as potential precursors for developing drugs against cancer.
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Affiliation(s)
- Na Li
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences; University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Ting Wang
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences; University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Zongmeng Li
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences; University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Xiaoli Ye
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences; University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Bo Deng
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences; University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Shu Zhuo
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences; University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Pengle Yao
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences; University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Mengmei Yang
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences; University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Hong Mei
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences; University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Xiaofang Chen
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences; University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Tengfei Zhu
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences; University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Shiting Chen
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences; University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Hui Wang
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences; University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China.,Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing 100022, China
| | - Jiming Wang
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute at Frederick, Frederick 21702, MD, USA
| | - Yingying Le
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences; University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China.,Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing 100022, China
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15
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Hou Y, Li X, Li Q, Xu J, Yang H, Xue M, Niu G, Zhuo S, Mu K, Wu G, Li X, Wang H, Zhu J, Zhuang T. STAT1 facilitates oestrogen receptor α transcription and stimulates breast cancer cell proliferation. J Cell Mol Med 2018; 22:6077-6086. [PMID: 30334368 PMCID: PMC6237559 DOI: 10.1111/jcmm.13882] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 07/25/2018] [Indexed: 12/12/2022] Open
Abstract
Oestrogen receptor α (ERα) is overexpressed in two‐thirds of all breast cancer cases and is involved in breast cancer development and progression. Although ERα ‐positive breast cancer can be effectively treated by endocrine therapy, endocrine resistance is an urgent clinical problem. Thus, further understanding of the underlying mechanisms involved in ERα signalling is critical in dealing with endocrine resistance in patients with breast cancer. In the present study, unbiased RNA sequence analysis was conducted between the MCF‐7 and MCF‐7 tamoxifen‐resistant (LCC2) cell lines in order to identify differentially expressed genes. The whole transcriptomic data indicated that the JAK‐STAT pathway is markedly up‐regulated, particularly the ISGF3 complex. As the critical effectors, STAT1 and IRF9 were up‐regulated 5‐ and 20‐fold, respectively, in LCC2 cells. The biological experiments indicated that STAT1 is important for ERα signalling. Depletion of STAT1 or inhibition of STAT1 function significantly decreased levels of ERα protein, ERα ‐target gene expression and cell proliferation in both the MCF‐7 and LCC2 cell lines. Chromatin immunoprecipitation revealed that ERα transcription is associated with STAT1 recruitment to the ERα promoter region, suggesting that transcriptional regulation is one mechanism by which STAT1 regulates ERα mRNA levels and ERα signalling in breast cancer cells. The present study reveals a possible endocrine‐resistant mechanism by which STAT1 modulates ERα signalling and confers tamoxifen resistance. Targeting of STAT1 is a potential treatment strategy for endocrine‐resistant breast cancers.
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Affiliation(s)
- Yingxiang Hou
- Laboratory of Molecular Oncology, Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, Henan, China.,Henan Key Laboratory of Immunology and Targeted Drugs, Xinxiang Medical University, Xinxiang, Henan, China.,Institute of Lung and Molecular Therapy (ILMT), Xinxiang Medical University, Xinxiang, Henan, China
| | - Xin Li
- Laboratory of Molecular Oncology, Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, Henan, China.,Henan Key Laboratory of Immunology and Targeted Drugs, Xinxiang Medical University, Xinxiang, Henan, China.,Institute of Lung and Molecular Therapy (ILMT), Xinxiang Medical University, Xinxiang, Henan, China
| | - Qianhua Li
- Department of Pathology, Shandong University School of Medicine, Jinan, Shandong, China
| | - Juntao Xu
- Rhil Rivers Technology (Beijing) Ltd, Beijing, China.,Department of Cancer Genomics, LemonData Biotech (Shenzhen), Shenzhen, China
| | - Huijie Yang
- Laboratory of Molecular Oncology, Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, Henan, China.,Henan Key Laboratory of Immunology and Targeted Drugs, Xinxiang Medical University, Xinxiang, Henan, China.,Institute of Lung and Molecular Therapy (ILMT), Xinxiang Medical University, Xinxiang, Henan, China
| | - Min Xue
- Laboratory of Molecular Oncology, Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, Henan, China.,Henan Key Laboratory of Immunology and Targeted Drugs, Xinxiang Medical University, Xinxiang, Henan, China.,Institute of Lung and Molecular Therapy (ILMT), Xinxiang Medical University, Xinxiang, Henan, China
| | - Gang Niu
- Rhil Rivers Technology (Beijing) Ltd, Beijing, China.,Department of Cancer Genomics, LemonData Biotech (Shenzhen), Shenzhen, China
| | - Shu Zhuo
- Department of Molecular Biology, UT Southwestern Medical Center, Dallas, Texas
| | - Kun Mu
- Department of Pathology, Shandong University School of Medicine, Jinan, Shandong, China
| | - Gaosong Wu
- Department of Thyroid and Breast Surgery, Zhongnan Hospital, Wuhan University, Wuhan, Hubei, China
| | - Xiumin Li
- Institute of Lung and Molecular Therapy (ILMT), Xinxiang Medical University, Xinxiang, Henan, China.,Center for Cancer Research, Xinxiang Medical University, Xinxiang, Henan, China
| | - Hui Wang
- Laboratory of Molecular Oncology, Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, Henan, China.,Henan Key Laboratory of Immunology and Targeted Drugs, Xinxiang Medical University, Xinxiang, Henan, China
| | - Jian Zhu
- Department of Molecular Biology, UT Southwestern Medical Center, Dallas, Texas
| | - Ting Zhuang
- Laboratory of Molecular Oncology, Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, Henan, China.,Henan Key Laboratory of Immunology and Targeted Drugs, Xinxiang Medical University, Xinxiang, Henan, China.,Institute of Lung and Molecular Therapy (ILMT), Xinxiang Medical University, Xinxiang, Henan, China
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16
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Mei H, Yao P, Wang S, Li N, Zhu T, Chen X, Yang M, Zhuo S, Chen S, Wang JM, Wang H, Xie D, Wu Y, Le Y. Chronic Low-Dose Cadmium Exposure Impairs Cutaneous Wound Healing With Defective Early Inflammatory Responses After Skin Injury. Toxicol Sci 2017; 159:327-338. [PMID: 28666365 PMCID: PMC6256962 DOI: 10.1093/toxsci/kfx137] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Impairment of the immune system is a developing concern in evaluating the toxicity of cadmium (Cd). In the present study, we investigated if Cd could impair cutaneous wound healing through interfering with inflammation after injury. We found that exposure of mice to CdCl2 through drinking water at doses of 10, 30, and 50 mg/l for 8 weeks significantly impaired cutaneous wound healing. Chronic 30 mg/l CdCl2 treatment elevated murine blood Cd level comparable to that of low dose Cd-exposed humans, had no effect on blood total and differential leukocyte counts, but reduced neutrophil infiltration, chemokines (CXCL1 and CXCL2), and proinflammatory cytokines (TNFα, IL-1β, and IL-6) expression in wounded tissue at early stage after injury. Wounded tissue homogenates from CdCl2-treated mice had lower chemotactic activity for neutrophils than those from untreated mice. Mechanistic studies showed that chronic Cd treatment suppressed ERK1/2 and NF-κB p65 phosphorylation in wounded tissue at early stage after injury. Compared with neutrophils isolated from untreated mice, neutrophils from CdCl2 treated mice and normal neutrophils treated with CdCl2 invitro both had lower chemotactic response, calcium mobilization and ERK1/2 phosphorylation upon chemoattractant stimulation. Collectively, our study indicate that chronic low-dose Cd exposure impaired cutaneous wound healing by reducing neutrophil infiltration through inhibiting chemokine expression and neutrophil chemotactic response, and suppressing proinflammatory cytokine expression. Cd may suppress chemokine and proinflammatory expression through inactivating ERK1/2 and NF-κB, and inhibit neutrophil chemotaxis by attenuating calcium mobilization and ERK1/2 phosphorylation in response to chemoattractants.
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Affiliation(s)
- Hong Mei
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences; University of the Chinese Academy of Sciences, Shanghai 200031, China
| | - Pengle Yao
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences; University of the Chinese Academy of Sciences, Shanghai 200031, China
| | - Shanshan Wang
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences; University of the Chinese Academy of Sciences, Shanghai 200031, China
| | - Na Li
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences; University of the Chinese Academy of Sciences, Shanghai 200031, China
| | - Tengfei Zhu
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences; University of the Chinese Academy of Sciences, Shanghai 200031, China
| | - Xiaofang Chen
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences; University of the Chinese Academy of Sciences, Shanghai 200031, China
| | - Mengmei Yang
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences; University of the Chinese Academy of Sciences, Shanghai 200031, China
| | - Shu Zhuo
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences; University of the Chinese Academy of Sciences, Shanghai 200031, China
| | - Shiting Chen
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences; University of the Chinese Academy of Sciences, Shanghai 200031, China
| | - Ji Ming Wang
- Laboratory of Molecular Immunoregulation, Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702
| | - Hui Wang
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences; University of the Chinese Academy of Sciences, Shanghai 200031, China
- Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing 100021, China
| | - Dong Xie
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences; University of the Chinese Academy of Sciences, Shanghai 200031, China
- Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing 100021, China
| | - Yongning Wu
- Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing 100021, China
| | - Yingying Le
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences; University of the Chinese Academy of Sciences, Shanghai 200031, China
- Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing 100021, China
- Institute for Hand Surgery, Ruihua Affiliated Hospital of Soochow University, Suzhou 215104, China
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Yao PL, Zhuo S, Mei H, Chen XF, Li N, Zhu TF, Chen ST, Wang JM, Hou RX, Le YY. Androgen alleviates neurotoxicity of β-amyloid peptide (Aβ) by promoting microglial clearance of Aβ and inhibiting microglial inflammatory response to Aβ. CNS Neurosci Ther 2017; 23:855-865. [PMID: 28941188 DOI: 10.1111/cns.12757] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 08/30/2017] [Accepted: 09/01/2017] [Indexed: 12/24/2022] Open
Abstract
AIMS Lower androgen level in elderly men is a risk factor of Alzheimer's disease (AD). It has been reported that androgen reduces amyloid peptides (Aβ) production and increases Aβ degradation by neurons. Activated microglia are involved in AD by either clearing Aβ deposits through uptake of Aβ or releasing cytotoxic substances and pro-inflammatory cytokines. Here, we investigated the effect of androgen on Aβ uptake and clearance and Aβ-induced inflammatory response in microglia, on neuronal death induced by Aβ-activated microglia, and explored underlying mechanisms. METHODS Intracellular and extracellular Aβ were examined by immunofluorescence staining and Western blot. Amyloid peptides (Aβ) receptors, Aβ degrading enzymes, and pro-inflammatory cytokines were detected by RT-PCR, real-time PCR, and ELISA. Phosphorylation of MAP kinases and NF-κB was examined by Western blot. RESULTS We found that physiological concentrations of androgen enhanced Aβ42 uptake and clearance, suppressed Aβ42 -induced IL-1β and TNFα expression by murine microglia cell line N9 and primary microglia, and alleviated neuronal death induced by Aβ42 -activated microglia. Androgen administration also reduced Aβ42 -induced IL-1β expression and neuronal death in murine hippocampus. Mechanistic studies revealed that androgen promoted microglia to phagocytose and degrade Aβ42 through upregulating formyl peptide receptor 2 and endothelin-converting enzyme 1c expression, and inhibited Aβ42 -induced pro-inflammatory cytokines expression via suppressing MAPK p38 and NF-κB activation by Aβ42 , in an androgen receptor independent manner. CONCLUSION Our study demonstrates that androgen promotes microglia to phagocytose and clear Aβ42 and inhibits Aβ42 -induced inflammatory response, which may play an important role in reducing the neurotoxicity of Aβ.
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Affiliation(s)
- Peng-Le Yao
- Key Laboratory of Food Safety Research, Chinese Academy of Sciences, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Shu Zhuo
- Key Laboratory of Food Safety Research, Chinese Academy of Sciences, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Hong Mei
- Key Laboratory of Food Safety Research, Chinese Academy of Sciences, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Xiao-Fang Chen
- Key Laboratory of Food Safety Research, Chinese Academy of Sciences, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Na Li
- Key Laboratory of Food Safety Research, Chinese Academy of Sciences, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Teng-Fei Zhu
- Key Laboratory of Food Safety Research, Chinese Academy of Sciences, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Shi-Ting Chen
- Key Laboratory of Food Safety Research, Chinese Academy of Sciences, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Ji-Ming Wang
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD, USA
| | - Rui-Xing Hou
- Ruihua Affiliated Hospital of Soochow University, Suzhou, China
| | - Ying-Ying Le
- Key Laboratory of Food Safety Research, Chinese Academy of Sciences, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Shanghai, China.,Ruihua Affiliated Hospital of Soochow University, Suzhou, China
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Chen Y, Du W, Shen G, Zhuo S, Zhu X, Shen H, Huang Y, Su S, Lin N, Pei L, Zheng X, Wu J, Duan Y, Wang X, Liu W, Wong M, Tao S. Household air pollution and personal exposure to nitrated and oxygenated polycyclic aromatics (PAHs) in rural households: Influence of household cooking energies. Indoor Air 2017; 27:169-178. [PMID: 27008622 DOI: 10.1111/ina.12300] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Accepted: 03/15/2016] [Indexed: 05/22/2023]
Abstract
Residential solid fuels are widely consumed in rural China, contributing to severe household air pollution for many products of incomplete combustion, such as polycyclic aromatic hydrocarbons (PAHs) and their polar derivatives. In this study, concentrations of nitrated and oxygenated PAH derivatives (nPAHs and oPAHs) for household and personal air were measured and analyzed for influencing factors like smoking and cooking energy type. Concentrations of nPAHs and oPAHs in kitchens were higher than those in living rooms and in outdoor air. Exposure levels measured by personal samplers were lower than levels in indoor air, but higher than outdoor air levels. With increasing molecular weight, individual compounds tended to be more commonly partitioned to particulate matter (PM); moreover, higher molecular weight nPAHs and oPAHs were preferentially found in finer particles, suggesting a potential for increased health risks. Smoking behavior raised the concentrations of nPAHs and oPAHs in personal air significantly. People who cooked food also had higher personal exposures. Cooking and smoking have a significant interaction effect on personal exposure. Concentrations in kitchens and personal exposure to nPAHs and oPAHs for households using wood and peat were significantly higher than for those using electricity and liquid petroleum gas (LPG).
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Affiliation(s)
- Y Chen
- Laboratory of Earth Surface Processes, College of Urban and Environmental Science, Peking University, Beijing, China
| | - W Du
- Laboratory of Earth Surface Processes, College of Urban and Environmental Science, Peking University, Beijing, China
| | - G Shen
- Laboratory of Earth Surface Processes, College of Urban and Environmental Science, Peking University, Beijing, China
| | - S Zhuo
- Laboratory of Earth Surface Processes, College of Urban and Environmental Science, Peking University, Beijing, China
| | - X Zhu
- Laboratory of Earth Surface Processes, College of Urban and Environmental Science, Peking University, Beijing, China
| | - H Shen
- Laboratory of Earth Surface Processes, College of Urban and Environmental Science, Peking University, Beijing, China
| | - Y Huang
- Laboratory of Earth Surface Processes, College of Urban and Environmental Science, Peking University, Beijing, China
| | - S Su
- Laboratory of Earth Surface Processes, College of Urban and Environmental Science, Peking University, Beijing, China
| | - N Lin
- Laboratory of Earth Surface Processes, College of Urban and Environmental Science, Peking University, Beijing, China
| | - L Pei
- Institute of Population Research, Peking University, Beijing, China
| | - X Zheng
- Institute of Population Research, Peking University, Beijing, China
| | - J Wu
- Institute of Population Research, Peking University, Beijing, China
| | - Y Duan
- College of Resources and Environment, Shanxi Agricultural University, Shanxi, China
| | - X Wang
- Laboratory of Earth Surface Processes, College of Urban and Environmental Science, Peking University, Beijing, China
| | - W Liu
- Laboratory of Earth Surface Processes, College of Urban and Environmental Science, Peking University, Beijing, China
| | - M Wong
- Consortium on Health, Environment, Education and Research (CHEER), Department of Science and Environmental Studies, Hong Kong Institute of Education, Hong Kong, China
| | - S Tao
- Laboratory of Earth Surface Processes, College of Urban and Environmental Science, Peking University, Beijing, China
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Zhuo S, Yang M, Zhao Y, Chen X, Zhang F, Li N, Yao P, Zhu T, Mei H, Wang S, Li Y, Chen S, Le Y. MicroRNA-451 Negatively Regulates Hepatic Glucose Production and Glucose Homeostasis by Targeting Glycerol Kinase-Mediated Gluconeogenesis. Diabetes 2016; 65:3276-3288. [PMID: 27495223 DOI: 10.2337/db16-0166] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 07/19/2016] [Indexed: 11/13/2022]
Abstract
MicroRNAs (miRNAs) are a new class of regulatory molecules implicated in type 2 diabetes, which is characterized by insulin resistance and hepatic glucose overproduction. We show that miRNA-451 (miR-451) is elevated in the liver tissues of dietary and genetic mouse models of diabetes. Through an adenovirus-mediated gain- and loss-of-function study, we found that miR-451 negatively regulates hepatic gluconeogenesis and blood glucose levels in normal mice and identified glycerol kinase (Gyk) as a direct target of miR-451. We demonstrate that miR-451 and Gyk regulate hepatic glucose production, the glycerol gluconeogenesis axis, and the AKT-FOXO1-PEPCK/G6Pase pathway in an opposite manner; Gyk could reverse the effect of miR-451 on hepatic gluconeogenesis and AKT-FOXO1-PEPCK/G6Pase pathway. Moreover, overexpression of miR-451 or knockdown of Gyk in diabetic mice significantly inhibited hepatic gluconeogenesis, alleviated hyperglycemia, and improved glucose tolerance. Further studies showed that miR-451 is upregulated by glucose and insulin in hepatocytes; the elevation of hepatic miR-451 in diabetic mice may contribute to inhibiting Gyk expression. This study provides the first evidence that miR-451 and Gyk regulate the AKT-FOXO1-PEPCK/G6Pase pathway and play critical roles in hepatic gluconeogenesis and glucose homeostasis and identifies miR-451 and Gyk as potential therapeutic targets against hyperglycemia in diabetes.
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Affiliation(s)
- Shu Zhuo
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Shanghai, China
- Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing, China
| | - Mengmei Yang
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Shanghai, China
| | - Yanan Zhao
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Shanghai, China
| | - Xiaofang Chen
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Shanghai, China
| | - Feifei Zhang
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Na Li
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Shanghai, China
| | - Pengle Yao
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Shanghai, China
| | - Tengfei Zhu
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Shanghai, China
| | - Hong Mei
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Shanghai, China
| | - Shanshan Wang
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Shanghai, China
| | - Yu Li
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Shiting Chen
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Shanghai, China
- Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing, China
| | - Yingying Le
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Shanghai, China
- Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing, China
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Chen X, Zhang F, Gong Q, Cui A, Zhuo S, Hu Z, Han Y, Gao J, Sun Y, Liu Z, Yang Z, Le Y, Gao X, Dong LQ, Gao X, Li Y. Hepatic ATF6 Increases Fatty Acid Oxidation to Attenuate Hepatic Steatosis in Mice Through Peroxisome Proliferator-Activated Receptor α. Diabetes 2016; 65:1904-15. [PMID: 27207533 DOI: 10.2337/db15-1637] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 04/06/2016] [Indexed: 11/13/2022]
Abstract
The endoplasmic reticulum quality control protein activating transcription factor 6 (ATF6) has emerged as a novel metabolic regulator. Here, we show that adenovirus-mediated overexpression of the dominant-negative form of ATF6 (dnATF6) increases susceptibility to develop hepatic steatosis in diet-induced insulin-resistant mice and fasted mice. Overexpression of dnATF6 or small interfering RNA-mediated knockdown of ATF6 decreases the transcriptional activity of peroxisome proliferator-activated receptor α (PPARα)/retinoid X receptor complex, and inhibits oxygen consumption rates in hepatocytes, possibly through inhibition of the binding of PPARα to the promoter of its target gene. Intriguingly, ATF6 physically interacts with PPARα, enhances the transcriptional activity of PPARα, and triggers activation of PPARα downstream targets, such as CPT1α and MCAD, in hepatocytes. Furthermore, hepatic overexpression of the active form of ATF6 promotes hepatic fatty acid oxidation and protects against hepatic steatosis in diet-induced insulin-resistant mice. These data delineate the mechanism by which ATF6 controls the activity of PPARα and hepatic mitochondria fatty acid oxidation. Therefore, strategies to activate ATF6 could be used as an alternative avenue to improve liver function and treat hepatic steatosis in obesity.
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Affiliation(s)
- Xuqing Chen
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China College of Life and Environmental Sciences, Shanghai Normal University, Shanghai, China
| | - Feifei Zhang
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Qi Gong
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Aoyuan Cui
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Shu Zhuo
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Zhimin Hu
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Yamei Han
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Jing Gao
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Yixuan Sun
- Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Zhengshuai Liu
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Zhongnan Yang
- College of Life and Environmental Sciences, Shanghai Normal University, Shanghai, China
| | - Yingying Le
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Xianfu Gao
- Key Laboratory of Systems Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Lily Q Dong
- Department of Cellular and Structural Biology, University of Texas Health Science Center at San Antonio, San Antonio, TX
| | - Xin Gao
- Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yu Li
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
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21
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Wang Y, Hu Y, Sun C, Zhuo S, He Z, Wang H, Yan M, Liu J, Luan Y, Dai C, Yang Y, Huang R, Zhou B, Zhang F, Zhai Q. Down-regulation of Risa improves insulin sensitivity by enhancing autophagy. FASEB J 2016; 30:3133-45. [PMID: 27251173 DOI: 10.1096/fj.201500058r] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 05/23/2016] [Indexed: 01/05/2023]
Abstract
It has been reported that some small noncoding RNAs are involved in the regulation of insulin sensitivity. However, whether long noncoding RNAs also participate in the regulation of insulin sensitivity is still largely unknown. We identified and characterized a long noncoding RNA, regulator of insulin sensitivity and autophagy (Risa), which is a poly(A)(+) cytoplasmic RNA. Overexpression of Risa in mouse primary hepatocytes or C2C12 myotubes attenuated insulin-stimulated phosphorylation of insulin receptor, Akt, and Gsk3β, and knockdown of Risa alleviated insulin resistance. Further studies showed that overexpression of Risa in hepatocytes or myotubes decreased autophagy, and knockdown of Risa up-regulated autophagy. Moreover, knockdown of Atg7 or -5 significantly inhibited the effect of knockdown of Risa on insulin resistance, suggesting that knockdown of Risa alleviated insulin resistance via enhancing autophagy. In addition, tail vein injection of adenovirus to knock down Risa enhanced insulin sensitivity and hepatic autophagy in both C57BL/6 and ob/ob mice. Taken together, the data demonstrate that Risa regulates insulin sensitivity by affecting autophagy and suggest that Risa is a potential target for treating insulin-resistance-related diseases.-Wang, Y., Hu, Y., Sun, C., Zhuo, S., He, Z., Wang, H., Yan, M., Liu, J., Luan, Y., Dai, C., Yang, Y., Huang, R., Zhou, B., Zhang, F., Zhai, Q. Down-regulation of Risa improves insulin sensitivity by enhancing autophagy.
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Affiliation(s)
- Yuangao Wang
- Key Laboratory of Nutrition and Metabolism, CAS Center for Excellence in Molecular Cell Science, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China; and
| | - Yanan Hu
- Key Laboratory of Nutrition and Metabolism, CAS Center for Excellence in Molecular Cell Science, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China; and
| | - Chenxia Sun
- Key Laboratory of Nutrition and Metabolism, CAS Center for Excellence in Molecular Cell Science, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China; and
| | - Shu Zhuo
- Key Laboratory of Nutrition and Metabolism, CAS Center for Excellence in Molecular Cell Science, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China; and
| | - Zhishui He
- Key Laboratory of Nutrition and Metabolism, CAS Center for Excellence in Molecular Cell Science, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China; and
| | - Hui Wang
- Key Laboratory of Nutrition and Metabolism, CAS Center for Excellence in Molecular Cell Science, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China; and
| | - Menghong Yan
- Key Laboratory of Nutrition and Metabolism, CAS Center for Excellence in Molecular Cell Science, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China; and
| | - Jun Liu
- Key Laboratory of Nutrition and Metabolism, CAS Center for Excellence in Molecular Cell Science, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China; and
| | - Yi Luan
- Key Laboratory of Nutrition and Metabolism, CAS Center for Excellence in Molecular Cell Science, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China; and
| | - Changgui Dai
- Key Laboratory of Nutrition and Metabolism, CAS Center for Excellence in Molecular Cell Science, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China; and
| | - Yonggang Yang
- Key Laboratory of Nutrition and Metabolism, CAS Center for Excellence in Molecular Cell Science, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China; and
| | - Rui Huang
- Key Laboratory of Nutrition and Metabolism, CAS Center for Excellence in Molecular Cell Science, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China; and
| | - Ben Zhou
- Key Laboratory of Nutrition and Metabolism, CAS Center for Excellence in Molecular Cell Science, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China; and
| | - Fang Zhang
- Key Laboratory of Nutrition and Metabolism, CAS Center for Excellence in Molecular Cell Science, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China; and
| | - Qiwei Zhai
- Key Laboratory of Nutrition and Metabolism, CAS Center for Excellence in Molecular Cell Science, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China; and School of Life Science and Technology, ShanghaiTech University, Shanghai, China
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Wang X, Xu TY, Liu XZ, Zhang SL, Wang P, Li ZY, Guan YF, Wang SN, Dong GQ, Zhuo S, Le YY, Sheng CQ, Miao CY. Discovery of Novel Inhibitors and Fluorescent Probe Targeting NAMPT. Sci Rep 2015; 5:12657. [PMID: 26227784 PMCID: PMC4521150 DOI: 10.1038/srep12657] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 07/01/2015] [Indexed: 12/11/2022] Open
Abstract
Nicotinamide phosphoribosyltransferase (NAMPT) is a promising antitumor target. Novel NAMPT inhibitors with diverse chemotypes are highly desirable for development of antitumor agents. Using high throughput screening system targeting NAMPT on a chemical library of 30000 small-molecules, we found a non-fluorescent compound F671-0003 and a fluorescent compound M049-0244 with excellent in vitro activity (IC50: 85 nM and 170 nM respectively) and anti-proliferative activity against HepG2 cells. These two compounds significantly depleted cellular NAD levels. Exogenous NMN rescued their anti-proliferative activity against HepG2 cells. Structure-activity relationship study proposed a binding mode for NAMPT inhibitor F671-0003 and highlighted the importance of hydrogen bonding, hydrophobic and π-π interactions in inhibitor binding. Imaging study provided the evidence that fluorescent compound M049-0244 (3 μM) significantly stained living HepG2 cells. Cellular fluorescence was further verified to be NAMPT dependent by using RNA interference and NAMPT over expression transgenic mice. Our findings provide novel antitumor lead compounds and a "first-in-class" fluorescent probe for imaging NAMPT.
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Affiliation(s)
- Xia Wang
- Department of Pharmacology, Second Military Medical University, Shanghai, China
| | - Tian-Ying Xu
- Department of Pharmacology, Second Military Medical University, Shanghai, China
| | - Xin-Zhu Liu
- Department of Pharmacology, Second Military Medical University, Shanghai, China
| | - Sai-Long Zhang
- Department of Pharmacology, Second Military Medical University, Shanghai, China
| | - Pei Wang
- Department of Pharmacology, Second Military Medical University, Shanghai, China
| | - Zhi-Yong Li
- Department of Pharmacology, Second Military Medical University, Shanghai, China
| | - Yun-Feng Guan
- Department of Pharmacology, Second Military Medical University, Shanghai, China
| | - Shu-Na Wang
- Department of Pharmacology, Second Military Medical University, Shanghai, China
| | - Guo-Qiang Dong
- Department of Medicinal Chemistry, Second Military Medical University, Shanghai, China
| | - Shu Zhuo
- 1] Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences. [2] Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing 100021, China
| | - Ying-Ying Le
- 1] Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences. [2] Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing 100021, China
| | - Chun-Quan Sheng
- Department of Medicinal Chemistry, Second Military Medical University, Shanghai, China
| | - Chao-Yu Miao
- Department of Pharmacology, Second Military Medical University, Shanghai, China
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Zhu X, Tang Y, Chen J, Xiong S, Zhuo S, Chen J. Monitoring wound healing of elastic cartilage using multiphoton microscopy. Osteoarthritis Cartilage 2013; 21:1799-806. [PMID: 23973917 DOI: 10.1016/j.joca.2013.08.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Revised: 08/06/2013] [Accepted: 08/12/2013] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To demonstrate the ability of multiphoton microscopy (MPM) for monitoring wound healing of elastic cartilage. METHOD In a rabbit ear model, four cartilage specimen groups at 1-day, 1-, 4-, 20-week healing time points as well as a normal elastic cartilage were examined with MPM without using labeling agents. MPM images at wound margins were obtained from specimens at different healing stages, compared with the Hematoxylin and Eosin (H&E) stained images. Image analysis was performed to characterize the collagen morphology for quantifying the wound healing progression of elastic cartilage. RESULTS MPM provided high-resolution images of elastic cartilage at varying depths. Comparisons of the images of specimens at different healing stages show obvious cell growth and matrix deposition. The results are consistent with the histological results. Moreover, quantitative analysis results show significant alteration in the collagen cavity size or collagen orientation index during wound healing of elastic cartilage, indicating the possibility to act as indicators for monitoring wound healing. CONCLUSION Our results suggested that MPM has the ability to monitor the wound healing progression of elastic cartilage, based on the visualization of cell growth and proliferation and quantitative characterization of collagen morphology during wound healing.
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Affiliation(s)
- X Zhu
- Institute of Laser and Optoelectronics Technology, Fujian Provincial Key Laboratory for Photonics Technology, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Normal University, Fuzhou 350007, PR China.
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Mou H, Li Z, Yao P, Zhuo S, Luan W, Deng B, Qian L, Yang M, Mei H, Le Y. Knockdown of FAM3B triggers cell apoptosis through p53-dependent pathway. Int J Biochem Cell Biol 2013; 45:684-91. [DOI: 10.1016/j.biocel.2012.12.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Revised: 11/28/2012] [Accepted: 12/03/2012] [Indexed: 01/08/2023]
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Abstract
OBJECTIVE Toll-like receptor 4 (TLR4) has been reported to induce insulin resistance through inflammation in high-fat-fed mice. However, the physiological role of TLR4 in metabolism is unknown. Here, we investigated the involvement of TLR4 in fasting metabolism. RESEARCH DESIGN AND METHODS Wild-type and TLR4 deficient (TLR4(-/-)) mice were either fed or fasted for 24 h. Glucose and lipid levels in circulation and tissues were measured. Glucose and lipid metabolism in tissues, as well as the expression of related enzymes, was examined. RESULTS Mice lacking TLR4 displayed aggravated fasting hypoglycemia, along with normal hepatic gluconeogenesis, but reversed activity of pyruvate dehydrogenase complex (PDC) in skeletal muscle, which might account for the fasting hypoglycemia. TLR4(-/-) mice also exhibited higher lipid levels in circulation and skeletal muscle after fasting and reversed expression of lipogenic enzymes in skeletal muscle but not liver and adipose tissue. Adipose tissue lipolysis is normal and muscle fatty acid oxidation is increased in TLR4(-/-) mice after fasting. Inhibition of fatty acid synthesis in TLR4(-/-) mice abolished hyperlipidemia, hypoglycemia, and PDC activity increase, suggesting that TLR4-dependent inhibition of muscle lipogenesis may contribute to glucose and lipid homeostasis during fasting. Further studies showed that TLR4 deficiency had no effect on insulin signaling and muscle proinflammatory cytokine production in response to fasting. CONCLUSIONS These data suggest that TLR4 plays a critical role in glucose and lipid metabolism independent of insulin during fasting and identify a novel physiological role for TLR4 in fuel homeostasis.
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Affiliation(s)
- Shanshan Pang
- From the Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China; and the Graduate School of Chinese Academy of Sciences, Shanghai, China
| | - Haiqing Tang
- From the Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China; and the Graduate School of Chinese Academy of Sciences, Shanghai, China
| | - Shu Zhuo
- From the Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China; and the Graduate School of Chinese Academy of Sciences, Shanghai, China
| | - Ying Qin Zang
- From the Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China; and the Graduate School of Chinese Academy of Sciences, Shanghai, China
- Corresponding author: Yingying Le, , or Ying Qin Zang,
| | - Yingying Le
- From the Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China; and the Graduate School of Chinese Academy of Sciences, Shanghai, China
- Corresponding author: Yingying Le, , or Ying Qin Zang,
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Chen G, Chen J, Zhuo S, Xiong S, Zeng H, Jiang X, Chen R, Xie S. Nonlinear spectral imaging of human hypertrophic scar based on two-photon excited fluorescence and second-harmonic generation. Br J Dermatol 2009; 161:48-55. [PMID: 19309369 DOI: 10.1111/j.1365-2133.2009.09094.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND A noninvasive method using microscopy and spectroscopy for analysing the morphology of collagen and elastin and their biochemical variations in skin tissue will enable better understanding of the pathophysiology of hypertrophic scars and facilitate improved clinical management and treatment of this disease. OBJECTIVE To obtain simultaneously microscopic images and spectra of collagen and elastin fibres in ex vivo skin tissues (normal skin and hypertrophic scar) using a nonlinear spectral imaging method, and to compare the morphological structure and spectral characteristics of collagen and elastin fibres in hypertrophic scar tissues with those of normal skin, to determine whether this approach has potential for in vivo assessment of the pathophysiology of human hypertrophic scars and for monitoring treatment responses as well as for tracking the process of development of hypertrophic scars in clinic. METHODS Ex vivo human skin specimens obtained from six patients aged from 10 to 50 years old who were undergoing skin plastic surgery were examined. Five patients had hypertrophic scar lesions and one patient had no scar lesion before we obtained his skin specimen. A total of 30 tissue section samples of 30 mum thickness were analysed by the use of a nonlinear spectral imaging system consisting of a femtosecond excitation light source, a high-throughput scanning inverted microscope, and a spectral imaging detection system. The high-contrast and high-resolution second harmonic generation (SHG) images of collagen and two-photon excited fluorescence (TPEF) images of elastin fibres in hypertrophic scar tissues and normal skin were acquired using the extracting channel tool of the system. The emission spectra were analysed using the image-guided spectral analysis method. The depth-dependent decay constant of the SHG signal and the image texture characteristics of hypertrophic scar tissue and normal skin were used to quantitatively assess the amount, distribution and orientation of their collagen and elastin components. RESULTS Our experiments and data analyses demonstrated apparent differences between hypertrophic scar tissue and normal skin in terms of their morphological structure and the spectral characteristics of collagen and elastin fibres. These differences can potentially be used to distinguish hypertrophic scar tissues from normal skin and to evaluate treatment responses. CONCLUSIONS All the measurements were performed in backscattering geometry and demonstrated that nonlinear spectral imaging has the ability to differentiate hypertrophic scar tissue from normal skin based on noninvasive SHG imaging, and TPEF imaging revealed the microstructure and spectral features of collagen and elastin fibres. With the advances in spectral imaging apparatus miniaturization, we have good reason to believe that this approach can become a valuable tool for the in vivo pathophysiology study of human skin hypertrophic scars and for assessing the treatment responses of this disfiguring disease in clinic. It can also be used to track the development of hypertrophic scars and to study wound healing processes in a noninvasive fashion without biopsy, fixation, sectioning and the use of exogenous dyes or stains.
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Affiliation(s)
- G Chen
- Key Laboratory of Optoelectronic Science and Technology for Medicine Fujian Normal University, Ministry of Education, and Fujian Provincial Key Laboratory of Photonic Technology, Fuzhou 350007, China
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Papkoff J, Strelow A, Lee S, Nguyen A, Diedrich G, Zhuo S, Liu W. 204 POSTER Discovery and validation of a promising new target for therapeutic monoclonal antibodies: a type II transmembrane serine protease overexpressed in human ovarian and pancreatic cancers. EJC Suppl 2006. [DOI: 10.1016/s1359-6349(06)70209-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Papkoff J, Liu W, Tang T, Munteanu A, Zhuo S, Liu Y, Salceda S, Macina R, Pilkington G, Corral L. 301 Genomic discovery, characterization and validation of a transmembrane protein overexpressed in human ovarian and pancreatic cancers: a promising new target for therapeutic monoclonal antibodies. EJC Suppl 2004. [DOI: 10.1016/s1359-6349(04)80309-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Sun B, Harrowe G, Reinhard C, Yoshihara C, Chu K, Zhuo S. Modulation of human cytomegalovirus immediate-early gene enhancer by mitogen-activated protein kinase kinase kinase-1. J Cell Biochem 2002; 83:563-73. [PMID: 11746500 DOI: 10.1002/jcb.1251] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The immediate-early (IE) promoter of human cytomegalovirus (HCMV) constitutes a primary genetic switch, which determines the progression of viral infection. Earlier reports by others have shown mitogen-activated protein kinase kinase kinase-1 (MEKK1) to be able to up-regulate HCMV-IE promoter through downstream mitogen-activated protein kinase (MAPK) pathways. However, we noticed that the activation of the HCMV-IE promoter by constitutively active MEKK1 (MEKK1-TRU) might not be through the MAPK pathways. Using a HCMV-IE enhancer/promoter (- 522 to + 72) driving a luciferase reporter, we demonstrated that the downstream MAPK activation actually repressed the up-regulation of the promoter by MEKK1 in CHO-K1 and human 293 cells. We further found that the up-regulation of HCMV-IE promoter by MEKK1 could be in great extent suppressed by over-expression of IkappaBalpha. Deletion of the NFkappaB/rel sites in the HCMV-IE enhancer region by mutagenesis proportionally reduced the transcriptional activation by MEKK1-TRU, whereas deletion of the ATF/CREB binding sites or cyclic AMP response elements (CRE) had no effects. Furthermore, the NFkappaB/rel deletion mutant also showed repression on the basic transcription activity of the HCMV-IE promoter. Our results indicate that the NFkappaB/rel sites are not only responsible for the modulation of HCMV-IE enhancer activity by MEKK1 but also control the basic transcription activity of the HCMV-IE promoter. On the other hand, the four consensus CRE sites were found to have no function in the activation of the promoter by MEKK1.
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Affiliation(s)
- B Sun
- Chiron Corporation, 4560 Horton Street, Emeryville, California 94608-2916, USA
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Waltz DA, Fujita RM, Yang X, Natkin L, Zhuo S, Gerard CJ, Rosenberg S, Chapman HA. Nonproteolytic role for the urokinase receptor in cellular migration in vivo. Am J Respir Cell Mol Biol 2000; 22:316-22. [PMID: 10696068 DOI: 10.1165/ajrcmb.22.3.3713] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The urokinase receptor (uPAR) binds and localizes urokinase activity at cellular surfaces, facilitating fibrinolysis and cellular migration at sites of tissue injury. uPAR also participates in cellular signaling and regulates integrin-dependent adhesion and migration in vitro. We now report evidence that uPAR occupancy regulates cellular migration in vivo in the absence of functional urokinase. Recombinant murine KC (1.5 microg), a potent neutrophil chemoattractant, was delivered to the lungs of wild-type, urokinase-deficient or uPAR-deficient mice 18 h after intraperitoneal injection of 200 microg human immunoglobulin G (IgG) or a fusion protein composed of an amino-terminal receptor-binding fragment of urokinase and a human IgG Fc fragment (GFD-Fc). Whole lung lavage for recovery of leukocytes was performed 4 h later. KC treatment resulted in a 100-fold increase in lavage neutrophils. GFD-Fc injection resulted in >50% reduction in neutrophil influx in both wild-type and urokinase-deficient animals but had no effect on uPAR -/- mice. A concomitant reduction in alveolar protein leakage but no change in numbers of circulating neutrophils accompanied this attenuated inflammatory response. The reduction in neutrophil influx induced by GFD-Fc is thus related to uPAR occupancy and yet not due to disruption of uPAR-mediated proteolysis. These observations verify that protease-independent functions of uPAR operate in vivo and identify uPAR as a potential target for regulation of inflammatory processes characterized by neutrophil-mediated injury.
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Affiliation(s)
- D A Waltz
- Department of Medicine, Children's Hospital, Boston, Massachusetts 02115, USA.
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Tao G, Ji A, Zhuo S. [FPMULTI--a software for multi-layer composition and thickness analysis and its applications]. Guang Pu Xue Yu Guang Pu Fen Xi 1999; 19:215-218. [PMID: 15819013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Main features of FPMULTI, a software for analyzing composition and thickness of multi-layer samples simultaneously using XRF, are briefly described in this paper. Based on fundamental parameter method, the software has the capability of determining multi-layer samples containing up to 10 layers and 25 elements. Calibration standards can be bulk or multi-layer of pure element or multi-element standards. Application examples for tin-plates, hot dip galvanized zinc-plates and 'fingerprint-resistant' plates were given. FPMULTI is used to predict the relationship between intensities of different X-ray lines and the thickness first and then to analyze those samples. When using only few calibration standards, the results from FPMULTI are much better than those from linear regression method, and this reflects the advantages of the fundamental parameter approach.
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Affiliation(s)
- G Tao
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, 200050 Shanghai
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Tressler RJ, Pitot PA, Stratton JR, Forrest LD, Zhuo S, Drummond RJ, Fong S, Doyle MV, Doyle LV, Min HY, Rosenberg S. Urokinase receptor antagonists: discovery and application to in vivo models of tumor growth. APMIS 1999; 107:168-73. [PMID: 10190294 DOI: 10.1111/j.1699-0463.1999.tb01540.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Urokinase receptor antagonists based on the growth factor domains of both human and murine urokinase which show sub-nanomolar affinities for their homologous receptors have been expressed as recombinant proteins. Further modification of these molecules by preparing fusions with the constant region of human IgG has led to molecules with high affinities and long in vivo half-lives. Smaller peptidic inhibitors have been obtained by a combination of bacteriophage display and peptide analog synthesis. All of these molecules inhibit the binding of the growth factor domain of uPA to the uPA receptor and enhance binding of the uPA receptor to vitronectin. Protein uPA receptor antagonists were tested in an in vivo tumor model using the human breast carcinoma MDAmb231 in immunodeficient mice. Both human and murine receptor antagonists showed significant inhibition of primary tumor growth, demonstrating that in vivo, both tumor and stromal cell uPA receptor dependent plasminogen activation can modulate tumor growth.
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Affiliation(s)
- R J Tressler
- Chiron Corporation, Emeryville, California 94608, USA
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Zhuo S, Dixon JE. Effects of sulfhydryl regents on the activity of lambda Ser/Thr phosphoprotein phosphatase and inhibition of the enzyme by zinc ion. Protein Eng 1997; 10:1445-52. [PMID: 9543006 DOI: 10.1093/protein/10.12.1445] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Sulfhydryl reagents, such as dithiothreitol (DTT), affected the activity of Ser/Thr phosphoprotein phosphatases. Addition of DTT to the assay buffer increased the affinity of lambda Ser/Thr phosphoprotein phosphatase (lambda-PPase) for its Mn2+ cofactor. On the other hand, the enzyme was found to be inactivated simply by dilution in Tris buffer. The inactivation could be completely prevented by the presence of DTT or Mn2+ in the buffer. Further studies showed that oxidation or reduction of cysteine residues in lambda-PPase may not be the cause of the change in the enzyme activity. Without exception, mutation of all cysteine residues in lambda-PPase to serine did not convert the enzyme into a thiol-insensitive mutant. By careful examination of the effects of different sulfhydryl reagents, metal ion cofactors and substrates on lambda-PPase, it was found that the role of sulfhydryl reagents was the chelation of small amounts of inhibitory metal ions, which were present in plastic laboratory ware, such as disposable cuvets and tubes, with prevention of the enzyme from inactivation. One of the main contaminants found in plastic cuvets was Zn2+, which is a potent inhibitor of lambda-PPase. The inhibition of lambda-PPase by Zn2+ was characterized. Pre-treatment of the enzyme (1-4 nM) with 1 microM of ZnCl2 almost completely inhibited the enzymatic activity in response to 2 mM Mn2+. However, no significant inhibition was found when the enzyme was added to the assay mixture containing 1 microM Zn2+ and 2 mM Mn2+ . This confirms the sensitivity of the holoenzyme to inhibitory metal ions in vitro. The kinetic analysis indicated that the inhibitory metal ion might compete with Mn2+ to bind to the active site of lambda-PPase. This was further supported by the mutation of metal cofactor binding amino acid residues of the enzyme. Mutants which have less affinity for Mn2+ are also less sensitive to Zn2+. Our results suggest that inhibitory metal ions may induce a different structural conformation for lambda-PPase.
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Affiliation(s)
- S Zhuo
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, 48109-0606, USA
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Xiao S, Shi Z, Zhuo S, Wang C, Zhang Z, Chu B, Zhen J, Chen M. Field studies on the preventive effect of oral artemether against schistosomal infection. Chin Med J (Engl) 1996; 109:272-5. [PMID: 8758286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
OBJECTIVE To study the preventive effect of oral artemether (Art) against schistosomal infection in the field. METHODS In Minglang District of Yiyang City, Hunan Province, there is an islet with embankment type endemic area in the southern Dongting Lake region. From August to October 1994 the residents who frequently contacted the infested water were selected for study and allocated to the Art group and the control group. About one month before the preventive Art administration, all the residents understudied were examined by stool hatching technique, and then treated orally with praziquantel at a single dose of 40 mg/kg in stool egg-negative residents and 50 mg/kg in stool egg-positive ones. In the Art group, the first dose of 6 mg/kg was given at the end of August, followed by 3 repeated doses every 15 days. Placebo (starch) was given to the control group at the same time as in the Art group. The preventive efficacy was evaluated by stool examination 25-32 days after the last medication. RESULTS In the Art group, 20 out of 365 studied residents became stool positive with an infection rate of 5.5%, while in the control group, 51 out of 376 studied residents were stool positive with an infection rate of 13.6%. The egg count per gram of feces (EPG) determined by the Kato-Katz method was 122 +/- 79 in the Art group and 681 +/- 909 in the control group. Meanwhile, two cases of acute schistosomiasis were found in the control group, but none was observed in the Art group. No apparent adverse side effect was seen during the treatment with Art. CONCLUSION Oral Art exhibited apparent preventive effect on the residents who contacted the infested water in schistosomiasis endemic area.
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Affiliation(s)
- S Xiao
- Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, Shanghai
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Abstract
The biosynthesis of 6(R)-5,6,7,8-tetrahydrobiopterin (BH4) in murine erythroleukemia (MEL) cells is almost completely inhibited by 10 mM, 2,4-diamino-6-hydroxypyrimidine (DAHP), which targets GTP cyclohydrolase. The inhibition results in dephosphorylation of the retinoblastoma gene product, prolongation of the G1-phase in the cell cycle, and subsequent commitment to terminal differentiation of MEL cells. Reversal of the processes by repletion of cellular BH4 with biopterin-related compounds including BH4, 7,8-dihydrobiopterin (7,8-BH2), sepiapterin, and 7,8-dihydroneopterin has generated complicated results. Low micromolar exogenous pterin compounds had little or no effect. At 300 microM or higher, the synthesis of hemoglobin by DAHP-induced MEL cells is significantly inhibited by 7,8-dihydrobiopterin and sepiapterin. However, further cell cycle analysis shows that the inhibition of cell differentiation by 7,8-BH2 and sepiapterin may not be due to the reversal of cell proliferation. Inhibition of BH4 biosynthesis in MEL cells by inhibitors of sepiapterin reductase has also been studied. None of the inhibitors that were tested, including N-chloroacetyl-dopamine and N-acetylserotonin, which are specific for sepiapterin reductase, can block MEL cells in G1-phase or induce the cells to commit to terminal differentiation. Furthermore, inhibitors of sepiapterin reductase are found to reduce or to abolish hemoglobin synthesis in differentiating MEL cells induced by hexamethylene bisacetamide. The mechanism for this is not clear. Not all of the effects caused by the depletion of BH4 synthesis can be rescued by repletion of BH4. These results suggest that BH4 may not regulate proliferation or differentiation of MEL cells as previously thought. Its function in MEL cells is still not clear.
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Affiliation(s)
- S Zhuo
- Laboratory of Neurochemistry, National Institute of Mental Health, National Institute of Health, Bethesda, Maryland 20892-4096, USA
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Zhuo S, Fan S, Huang S, Kaufman S. Study of the role of retinoblastoma protein in terminal differentiation of murine erythroleukemia cells. Proc Natl Acad Sci U S A 1995; 92:4234-8. [PMID: 7753788 PMCID: PMC41918 DOI: 10.1073/pnas.92.10.4234] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Hexamethylenebisacetamide-induced terminal differentiation of Friend virus-transformed murine erythroleukemia (MEL) cells can be inhibited by okadaic acid, an inhibitor of type 1 and type 2A protein phosphatases. The inhibition is shown to be correlated with prevention of dephosphorylation of retinoblastoma protein (pRB) in cells and bypass of G1 prolongation in the cell cycle. These results suggest that pRB-mediated G1 prolongation is necessary for MEL cells to commit to terminal differentiation. However, further experiments demonstrate that the simple cell cycle exit is not sufficient for commitment to terminal differentiation. Induction of dephosphorylation of pRB and subsequent G1 prolongation by forskolin does not lead MEL cells to differentiate. Additional pRB has been expressed in MEL cells by transfection with a neo-resistant plasmid containing RB cDNA under the control of a cytomegalovirus promoter. Exogenously expressed pRB is hyperphosphorylated in logarithmically growing MEL cells without any noticeable change in growth rate between the transfected cell line and the parental cell line. This result suggests that pRB in MEL cells is regulated by protein kinases and protein phosphatases and not by transcription.
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Affiliation(s)
- S Zhuo
- Laboratory of Neurochemistry, National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892, USA
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Xiao S, Shi Z, Zhuo S, Wang C, Zhang Z, Chu B, Zheng J, Chen M. [Field studies on preventive effect of artemether against infection with Schistosoma japonicum]. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 1995; 13:170-173. [PMID: 8556789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
From August to October 1994, a field trial of preventive treatment with artemether (Art) was carried out in Minglang District of Yiyang City, Hunan Province, an islet with embankment type endemic area nearby southern Donting Lake region. The residents who frequently contacted with the infested water were selected for study and allocated to the Art group and the control group in reference to paired methods of randomization table. About one month before administration of Art, all residents under study were examined by stool hatching technique after nylon-bag concentration to determine the infection rate of each group, and then treated with praziquantel at a single dose of 40 mg/kg in stool egg-negative residents and 50 mg/kg in stool egg-positive ones. In Art group, the first dose of 6 mg/kg was given in late August, followed by repeated dosing every 15 days for 3 times. Placebo (starch) was given to the study residents in the control group at the same time as in Art group. The efficacy was evaluated by stool examination 25-32 days after the last medication. The results showed that after the preventive administration of Art, 20 out of 365 study residents in Art group revealed stool positive with an infection rate of 5.5%, while in the control group 51 out of 376 study residents showed stool positive with an infection rate of 13.6%. The difference between the two groups was statistically significant. Meantime, two cases of acute schistosomiasis were seen in the control group, but none was observed in Art group. The egg per gram of feces (EPG) determined with the Kato-Katz method was 122 +/- 79 (range 12-192) in Art group and 681 +/- 909 (range 12-2,760) in the control group. No apparent adverse side effect was seen during the treatment with Art, and no abnormal change in liver and renal function was detected after the last medication. The preliminary study indicates that application of the preventive administration of Art in the endemic area during the transmission season may effectively reduce both the infection rate and intensity of schistosomiasis.
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Affiliation(s)
- S Xiao
- Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, Shanghai
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Zhuo S, Clemens JC, Stone RL, Dixon JE. Mutational analysis of a Ser/Thr phosphatase. Identification of residues important in phosphoesterase substrate binding and catalysis. J Biol Chem 1994; 269:26234-8. [PMID: 7929339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The Ser/Thr phosphoprotein phosphatases (PPases) display similarities in amino acid sequence and biochemical properties. Most members of this family require transition metal ions for activity. The smallest family member, the bacteriophage lambda PPase (lambda-PPase), has been successfully overexpressed in Escherichia coli, purified, and characterized (Zhuo, S., Clemens, J.C., Hakes, D.J., Barford, D., and Dixon, J. E. (1993) J. Biol. Chem. 268, 17754-17761). Site-directed mutagenesis has now been employed to define amino acid residues in lambda-PPase required for metal ion binding and catalysis. Conservative amino acid substitutions at residues Asp20, His22, Asp49, His76, and Glu77 affected lambda-PPase catalysis and metal ion binding, whereas substitutions at residues Arg53 and Arg73 affected catalysis and substrate binding. Each of these residues is invariant in all phosphoprotein phosphatases, suggesting that these residues may play important roles in binding and catalysis in all of the PPases. Computer-assisted sequence alignment further revealed that lambda-PPase residues Asp20, His22, Asp49, His76, Arg53, and Arg73 lie within three larger regions of PPase sequence identity with the consensus sequence (DXH-(approximately 25)-GDXXD-(approximately 25)-GNHD/E). This motif can be found in a wide variety of phosphoesterases unrelated to the PPases and defines structural and catalytic features utilized by a diverse group of enzymes for the hydrolysis of phosphate esters.
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Affiliation(s)
- S Zhuo
- Department of Biological Chemistry, University of Michigan, Ann Arbor 48109
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Zhuo S, Clemens JC, Hakes DJ, Barford D, Dixon JE. Expression, purification, crystallization, and biochemical characterization of a recombinant protein phosphatase. J Biol Chem 1993; 268:17754-61. [PMID: 8394350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
A protein phosphatase (PPase) from the bacteriophage lambda was overexpressed in Escherichia coli. The recombinant enzyme was purified to homogeneity yielding approximately 17 mg of enzyme from a single liter of bacterial culture. Biochemical characterization of the enzyme showed that it required Mn2+ or Ni2+ as an activator. The recombinant enzyme was active toward serine, threonine, and tyrosine phosphoproteins and phosphopeptides. Surprisingly, the bacterial histidyl phosphoprotein, NRII, was also dephosphorylated by the lambda-PPase. The lambda-PPase shares a number of kinetic and structural properties with the eukaryotic Ser/Thr phosphatases, suggesting that the lambda-PPase will serve as a good model for structure-function studies. Crystallization of the recombinant purified lambda-PPase yielded monoclinic crystals. The crystals diffract to 4.0 A when exposed to synchrotron x-ray radiation.
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Affiliation(s)
- S Zhuo
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor 48109-0606
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Zhuo S, Paik SR, Register JA, Allison WS. Photoinactivation of the bovine heart mitochondrial F1-ATPase by [14C]dequalinium cross-links phenylalanine-403 or phenylalanine-406 of an alpha subunit to a site or sites contained within residues 440-459 of a beta subunit. Biochemistry 1993; 32:2219-27. [PMID: 8443163 DOI: 10.1021/bi00060a013] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Synthesis of [14C]dequalinium, 1,1'-(1,10-[1,10-14C]decanediyl)bis[4-amino-2-methylquinolinium ], is described, which photoinactivates the bovine heart mitochondrial F1-ATPase (MF1). Maximal photoinactivation occurs on incorporation of about 1.5 mol of [14C]dequalinium/mol of MF1. Three radioactive species were resolved when photoinactivated enzyme was submitted to polyacrylamide gel electrophoresis at pH 4.0 in the presence of tetradecyltrimethylammonium bromide, which correspond to the alpha and beta subunits and a cross-linked species with an M(r) of 116,000. Fractionation of a tryptic digest of photoinactivated enzyme by high-performance liquid chromatography led to isolation of a radioactive peptide which contains residues 399-420 of a alpha subunit. Two fragments containing equal amounts of radioactivity were obtained on fractionation of an endoproteinase Asp-N digest of the isolated radioactive tryptic peptide by high-performance liquid chromatography. Amino acid sequence analysis showed that both fragments contained residues 399-408 of the alpha subunit, but one was missing Phe-alpha 403 and the other was lacking Phe-alpha 406. Fractionation of a cyanogen bromide digest of photoinactivated enzyme followed by trypsin digestion of partially purified cyanogen bromide fragments and fractionation of the resulting radioactive tryptic fragments yielded several radioactive species comprised of residues 399-420 of the alpha subunit cross-linked to residues 440-459 of the beta subunit and a radioactive fragment containing residues 399-420 of the alpha subunit. Partial sequence analyses of the cross-linked fragments suggest that Phe-alpha 403 and Phe-alpha 406 participate in cross-links, whereas no information was obtained on the site or sites of cross-linking in the beta subunit fragment.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- S Zhuo
- Department of Chemistry, University of California, San Diego, La Jolla 92093-0601
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Abstract
This review focuses on the location and interaction of three functional sites in F1-ATPases. These are catalytic sites which are located in beta subunits, noncatalytic nucleotide-binding sites which are located at interfaces of alpha and beta subunits and modulate the hydrolytic activity of the enzyme, and a site that binds inhibitory amphipathic cations which is at an interface of alpha and beta subunits. The latter site may participate in transmission of conformational signals between catalytic sites in F1 and the proton-conducting apparatus of F0 in the intact ATP synthases.
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Affiliation(s)
- W S Allison
- Department of Chemistry, University of California, San Diego, La Jolla 92093-0601
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Zhuo S, Garrod S, Miller P, Allison WS. Irradiation of the bovine mitochondrial F1-ATPase previously inactivated with 5'-p-fluorosulfonylbenzoyl-8-azido-[3H]adenosine cross-links His-beta 427 to Tyr-beta 345 within the same beta subunit. J Biol Chem 1992; 267:12916-27. [PMID: 1320008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The bovine heart mitochondrial F1-ATPase (MF1) is inactivated by 5'-p'-fluorosulfonylbenzoyl-8-azidoadenosine (8-N3-FSBA) with an apparent Kd of 0.47 mM at pH 8.0 and 23 degrees C in the absence of light. Irradiation of dark-inactivated enzyme with long-wavelength UV light produced cross-linked dimers and, to a lesser extent, trimers made up of alpha and beta subunits. Two major radioactive peptides were resolved by high-performance liquid chromatography from tryptic digests of MF1 which had been inactivated with 8-N3-FSB[3H]A at pH 8.0 in the dark. Sequence analysis revealed that one contained Tyr-beta 368 and the other contained His-beta 427 which were labeled in the ratio of 18:15. Sequence analysis of radioactive tryptic peptides isolated from digests of irradiated MF1 derivatized with 8-N3-FSB[3H]A showed that photolysis induced cross-linking of His-427 to Tyr-345 within the same beta subunit in high yield. When MF1 derivatized with 8-N3-FSB[3H]A was irradiated in the presence of beta-mercaptoethanol, alpha-beta cross-links were eliminated, whereas those between His-beta 427 and Tyr-beta 345 were unaffected. Analysis of radioactive peptides in tryptic digests of MF1 derivatized with 8-N3-FSB[3H]A and then irradiated in the presence or absence of beta-mercaptoethanol showed that the nitrene generated from reagent attached to Tyr-beta 368 participates in formation of alpha-beta cross-links in the absence of beta-mercaptoethanol. Therefore, the nitrene generated from reagent tethered to His-beta 427 is shielded from solvent and reacts with the side chain of Tyr-beta 345. In contrast, the nitrene generated from reagent attached to Tyr-beta 368 is exposed to solvent, but in the absence of scavengers reacts with side chains present in the alpha subunit. Irradiation of MF1, partially inactivated with 8-N3-FSBA, led to loss of residual ATPase activity without affecting residual ITPase activity. The amount of photoinactivation was greater when partial dark inactivation was performed at pH 6.9, where modification of His-beta 427 predominates, than when performed at pH 8.0, where modification of Tyr-beta 368 predominates. This suggests that cross-linking of His-beta 427 to Tyr-beta 345, and not cross-linking of alpha and beta subunits, is responsible for the augmented inactivation induced by irradiation.
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Affiliation(s)
- S Zhuo
- Department of Chemistry, University of California, La Jolla 92093-0601
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Abstract
The bovine heart mitochondrial F1-ATPase is inhibited in the dark by the amphipathic cation, dequalinium, with a I0.5 of about 12 microM at pH 7.5. When illuminated at 350 nm in the presence of 1.7 microM dequalinium, the F1-ATPase is inactivated with a pseudo-first order rate constant of 7.9 X 10(-3) min-1. The apparent Kd of the dequalinium-enzyme complex was estimated to be about 12.5 microM by examining the rate of inactivation of the ATPase with 1.7-16.7 microM dequalinium. ATP, ADP, Pi, and Mg2+, singly or in combination, protected the ATPase against photoinactivation, with Mg2+ plus Pi being the most effective.
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Affiliation(s)
- S Zhuo
- Department of Chemistry, University of California at San Diego, La Jolla 92093
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