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Li Y, Tian X, Zhang Q, Yan C, Han Y. A novel function of CREG in metabolic disorders. MEDICAL REVIEW (BERLIN, GERMANY) 2021; 1:18-22. [PMID: 37724076 PMCID: PMC10388757 DOI: 10.1515/mr-2021-0031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 12/13/2021] [Indexed: 09/20/2023]
Abstract
Metabolic disorders are public health problems that require prevention and new efficient drugs for treatment. Cellular repressor of E1A-stimulated genes (CREG) is ubiquitously expressed in mature tissues and cells in mammals and plays a critical role in keeping cells or tissues in a mature, homeostatic state. Recently, CREG turns to be an important mediator in the development of metabolic disorders. Here in this review, we briefly discuss the structure and molecular regulation of CREG along with the therapeutic strategy to combat the metabolic disorders.
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Affiliation(s)
- Yang Li
- Cardiovascular Research Institute and Department of Cardiology, General Hospital of Northern Theater Command, Shenyang 110016, Liaoning, China
| | - Xiaoxiang Tian
- Cardiovascular Research Institute and Department of Cardiology, General Hospital of Northern Theater Command, Shenyang 110016, Liaoning, China
| | - Quanyu Zhang
- Cardiovascular Research Institute and Department of Cardiology, General Hospital of Northern Theater Command, Shenyang 110016, Liaoning, China
| | - Chenghui Yan
- Cardiovascular Research Institute and Department of Cardiology, General Hospital of Northern Theater Command, Shenyang 110016, Liaoning, China
| | - Yaling Han
- Cardiovascular Research Institute and Department of Cardiology, General Hospital of Northern Theater Command, Shenyang 110016, Liaoning, China
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Yang L, Wang W, Wang X, Zhao J, Xiao L, Gui W, Fan H, Xia J, Li Z, Yan J, Alasbahi A, Zhu Q, Hou X. Creg in Hepatocytes Ameliorates Liver Ischemia/Reperfusion Injury in a TAK1-Dependent Manner in Mice. Hepatology 2019; 69:294-313. [PMID: 30076625 DOI: 10.1002/hep.30203] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Accepted: 06/26/2018] [Indexed: 12/16/2022]
Abstract
Hepatic ischemia/reperfusion (I/R) is a major challenge for liver surgery and specific severe conditions of chronic liver disease. Current surgical and pharmacological strategies are limited to improve liver function after hepatic I/R injury. Thus, an in-depth understanding of the liver I/R mechanism is pivotal to develop new therapeutic methods. The cellular repressor of E1A-stimulated genes (Creg), a key regulator of cellular proliferation, exerts protective roles in cardiovascular diseases and participates in lipid accumulation and inflammatory response in the liver. However, the role of Creg in hepatic I/R remains largely unknown. A genetic engineering technique was used to explore the function of Creg in hepatic I/R injury. Hepatocyte-specific Creg knockout (CregΔHep ) and transgenic mice were generated and subjected to hepatic I/R injury, as were the controls. Creg in hepatocytes prevented against liver I/R injury by suppressing cell death and inflammation. In vitro studies were performed using primary hepatocytes isolated from CregΔHep that were challenged by hypoxia/reoxygenation insult. These cells exhibited more cell death and inflammatory cytokines production similar to observations in vivo. Moreover, further molecular experiments showed that Creg suppressed mitogen-activated protein kinase (MAPK) signaling by inhibiting TAK1 (TGF-β-activated kinase 1) phosphorylation. Inhibiting TAK1 by 5Z-7-ox or mutating the TAK1-binding domain of Creg abolished the protective role of Creg indicating that Creg binding to TAK1 was required for prevention against hepatic I/R injury. Conclusion: These data demonstrate that Creg prevents hepatocytes from liver I/R injury. The Creg-TAK1 interaction inhibited the phosphorylation of TAK1 and the activation of MAPK signaling, which protected against cell death and inflammation during hepatic I/R injury.
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Affiliation(s)
- Ling Yang
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Weijun Wang
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaozhan Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Jinfang Zhao
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Li Xiao
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wenfang Gui
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Huiqian Fan
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jing Xia
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhonglin Li
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jingjing Yan
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Afnan Alasbahi
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | | | - Xiaohua Hou
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Li Y, Yan CH, Han YL. CREG mediated adventitial fibroblast phenotype modulation: A possible therapeutic target for proliferative vascular disease. Med Hypotheses 2012; 79:95-7. [DOI: 10.1016/j.mehy.2012.04.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Accepted: 04/03/2012] [Indexed: 11/16/2022]
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Buschke DG, Squirrell JM, Fong JJ, Eliceiri KW, Ogle BM. Cell death, non-invasively assessed by intrinsic fluorescence intensity of NADH, is a predictive indicator of functional differentiation of embryonic stem cells. Biol Cell 2012; 104:352-64. [PMID: 22304470 DOI: 10.1111/boc.201100091] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Accepted: 01/31/2012] [Indexed: 12/13/2022]
Abstract
BACKGROUND INFORMATION Continued advances in stem cell biology and stem cell transplantation rely on non-invasive biomarkers to characterise cells and stem cell aggregates. The non-invasive quality of such biomarkers is essential because exogenous labels, probes or reporters can unintentionally and dramatically alter stem cell state as can disruption of cell-cell and cell-matrix interactions. Here, we investigate the utility of the autofluorescent metabolite, nicotinamide adenine dinucleotide (NADH), as a non-invasive, intrinsic biomarker of cell death when detected with multi-photon optical-based approaches. To test this possibility, cell death was induced in murine embryoid bodies (EBs) at an early stage (day 3) of differentiation using staurosporine, an ATP-competitive kinase inhibitor of electron transport. Several hours after staurosporine treatment, EBs were stained with a single-colour, live/dead probe. A single-cross-sectional plane of each EB was imaged to detect the fluorescence intensity of the live/dead probe (extrinsic fluorescence) as well as the fluorescence intensity of NADH (intrinsic fluorescence). EBs were assessed at subsequent time points (days 6-12) for the formation of beating areas as an indicator of functional differentiation. RESULTS Statistical comparison indicated a strong positive correlation between extrinsic fluorescence intensity of the live/dead stain and intrinsic fluorescence of NADH, suggesting that the intensity of NADH fluorescence could be used to reliably and non-invasively assess death of cells of EBs. Furthermore, EBs that had high levels of cell death soon after aggregate formation had limited ability to give rise to functional cardiomyocytes at later time points. CONCLUSIONS We demonstrate the utility of NADH fluorescence intensity as a non-invasive indicator of cell death in stem cell aggregates when measured using multi-photon excitation. In addition, we show that the degree of stem cell death at early stages of differentiation is predictive for the formation of functional cardiomyocytes.
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Affiliation(s)
- David G Buschke
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
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Oh SI, Lee CK, Cho KJ, Lee KO, Cho SG, Hong S. Technological progress in generation of induced pluripotent stem cells for clinical applications. ScientificWorldJournal 2012; 2012:417809. [PMID: 22536140 PMCID: PMC3317624 DOI: 10.1100/2012/417809] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2011] [Accepted: 10/18/2011] [Indexed: 12/29/2022] Open
Abstract
Reprogramming of somatic cells into induced pluripotent stem cells (iPSCs) is achieved by viral-mediated transduction of defined transcription factors. Generation of iPSCs is of great medical interest as they have the potential to be a source of patient-specific cells. For the eventual goal of clinical application, it is necessary to overcome the limitations of low reprogramming efficiency and chromosomal abnormalities due to viral DNA integration. In this paper, we summarize the current state of reprogramming technology for generation of iPSCs and also discuss potential approaches to the development of safe iPSCs for personalized cell-based replacement therapy.
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Affiliation(s)
- Seung-Ick Oh
- Department of Biomedical Science, College of Health Science, Korea University, Jeongneung-dong, Sungbuk-gu, Seoul 136-703, Republic of Korea
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