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Chen X, Pan H, Li J, Zhang G, Cheng S, Zuo N, Zhao Q, Peng Z. Inhibition of myeloid differentiation 1 specifically in colon with antisense oligonucleotide exacerbates dextran sodium sulfate-induced colitis. J Cell Biochem 2019; 120:16888-16899. [PMID: 31104313 DOI: 10.1002/jcb.28947] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 03/02/2019] [Accepted: 03/15/2019] [Indexed: 02/06/2023]
Abstract
Myeloid differentiation 1 (MD-1), also known as lymphocyte antigen 86 (Ly86), is a soluble protein homologous to MD-2 and forms a complex with radioprotective 105 (RP105). RP105/MD-1 complex negatively regulates toll-like receptor 4 (TLR4) signaling and is involved in several immune disorders. However, the precise role of MD-1 in inflammatory bowel diseases (IBD) remains poorly understood. To further investigate the involvement of MD-1 in IBD, we inhibited MD-1 in colon with antisense oligonucleotide (AS-ODN) and assessed the effect of MD-1 inhibition on dextran sodium sulfate (DSS)-induced colitis. We discovered that MD-1 protein expression was remarkably decreased in both patients with ulcerative colitis and mice with DSS-induced colitis. For the first time, we showed that oral administration of MD-1 AS-ODN to mice significantly suppressed the MD-1 protein levels in colon rather than systemic tissues. Subsequently, we found that MD-1 AS-ODN treated mice were more susceptible to DSS-induced colitis based on loss of body weight, colon length, histological scores, and disease activity index. MD-1 inhibition also significantly enhanced inflammatory cytokines production such as IL-6 and IL-1β in colons. Finally, mice treated with MD-1 AS-ODN exhibited increased messenger RNA levels of TLR4 and MyD88 after DSS exposure and showed enhanced nuclear factor (NF)-κB activation compared with the control. Taken together, specifically suppression of MD-1 in colon tissues with AS-ODN exacerbates DSS-induced experimental colitis in mice, which is possibly related to activation of TLR4/NF-κB signaling.
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Affiliation(s)
- Xiaoxing Chen
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People's Republic of China.,Hubei Clinical Center & Key Laboratory of Intestinal & Colorectal Diseases, Wuhan, Hubei, People's Republic of China
| | - Huaqin Pan
- Department of Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People's Republic of China
| | - Jin Li
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People's Republic of China.,Hubei Clinical Center & Key Laboratory of Intestinal & Colorectal Diseases, Wuhan, Hubei, People's Republic of China
| | - Guqin Zhang
- Department of Respiratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People's Republic of China
| | - Shizhe Cheng
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People's Republic of China.,Hubei Clinical Center & Key Laboratory of Intestinal & Colorectal Diseases, Wuhan, Hubei, People's Republic of China
| | - Na Zuo
- Department of Gynecological Oncology, Zhongnan Hospital of Wuhan University, Hubei Cancer Clinical Study Center, Hubei Key Laboratory of Tumor Biological Behaviors, Wuhan, Hubei, People's Republic of China
| | - Qiu Zhao
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People's Republic of China.,Hubei Clinical Center & Key Laboratory of Intestinal & Colorectal Diseases, Wuhan, Hubei, People's Republic of China
| | - Zhiyong Peng
- Department of Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People's Republic of China
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Xiong X, Liu Y, Mei Y, Peng J, Wang Z, Kong B, Zhong P, Xiong L, Quan D, Li Q, Wang G, Huang H. Novel Protective Role of Myeloid Differentiation 1 in Pathological Cardiac Remodelling. Sci Rep 2017; 7:41857. [PMID: 28165494 PMCID: PMC5292962 DOI: 10.1038/srep41857] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 12/29/2016] [Indexed: 12/22/2022] Open
Abstract
Myeloid differentiation 1 (MD-1), a secreted protein interacting with radioprotective 105 (RP105), plays an important role in Toll-like receptor 4 (TLR4) signalling pathway. Previous studies showed that MD-1 may be restricted in the immune system. In this study, we demonstrated for the first time that MD-1 was highly expressed in both human and animal hearts. We also discovered that cardiac-specific overexpression of MD-1 significantly attenuated pressure overload-induced cardiac hypertrophy, fibrosis, and dysfunction, whereas loss of MD-1 had the opposite effects. Similar results were observed for in vitro angiotensin II-induced neonatal rat cardiomyocyte hypertrophy. The antihypertrophic effects of MD-1 under hypertrophic stimuli were associated with the blockage of MEK-ERK 1/2 and NF-κB signalling. Blocking MEK-ERK 1/2 signalling with a pharmacological inhibitor (U0126) greatly attenuated the detrimental effects observed in MD-1 knockout cardiomyocytes exposed to angiotensin II stimuli. Similar results were observed by blocking NF-κB signalling with a pharmacological inhibitor (BAY11–7082). Our data indicate that MD-1 inhibits cardiac hypertrophy and suppresses cardiac dysfunction during the remodelling process, which is dependent on its modulation of the MEK-ERK 1/2 and NF-κB signalling pathways. Thus, MD-1 might be a novel target for the treatment of pathological cardiac hypertrophy.
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Affiliation(s)
- Xiaojv Xiong
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, PR China.,Cardiovascular Research Institute of Wuhan University, Wuhan, Hubei Province, PR China.,Hubei Key Laboratory of Cardiology, Wuhan 430060, Hubei Province, PR China
| | - Yu Liu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, PR China.,Cardiovascular Research Institute of Wuhan University, Wuhan, Hubei Province, PR China.,Hubei Key Laboratory of Cardiology, Wuhan 430060, Hubei Province, PR China
| | - Yang Mei
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, PR China.,Cardiovascular Research Institute of Wuhan University, Wuhan, Hubei Province, PR China.,Hubei Key Laboratory of Cardiology, Wuhan 430060, Hubei Province, PR China
| | - Jianye Peng
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, PR China.,Cardiovascular Research Institute of Wuhan University, Wuhan, Hubei Province, PR China.,Hubei Key Laboratory of Cardiology, Wuhan 430060, Hubei Province, PR China
| | - Zhiqiang Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, PR China.,Cardiovascular Research Institute of Wuhan University, Wuhan, Hubei Province, PR China.,Hubei Key Laboratory of Cardiology, Wuhan 430060, Hubei Province, PR China
| | - Bin Kong
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, PR China.,Cardiovascular Research Institute of Wuhan University, Wuhan, Hubei Province, PR China.,Hubei Key Laboratory of Cardiology, Wuhan 430060, Hubei Province, PR China
| | - Peng Zhong
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, PR China.,Cardiovascular Research Institute of Wuhan University, Wuhan, Hubei Province, PR China.,Hubei Key Laboratory of Cardiology, Wuhan 430060, Hubei Province, PR China
| | - Liang Xiong
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, PR China.,Cardiovascular Research Institute of Wuhan University, Wuhan, Hubei Province, PR China.,Hubei Key Laboratory of Cardiology, Wuhan 430060, Hubei Province, PR China
| | - Dajun Quan
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, PR China.,Cardiovascular Research Institute of Wuhan University, Wuhan, Hubei Province, PR China.,Hubei Key Laboratory of Cardiology, Wuhan 430060, Hubei Province, PR China
| | - Qi Li
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, PR China.,Cardiovascular Research Institute of Wuhan University, Wuhan, Hubei Province, PR China.,Hubei Key Laboratory of Cardiology, Wuhan 430060, Hubei Province, PR China
| | - Guangji Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, PR China.,Cardiovascular Research Institute of Wuhan University, Wuhan, Hubei Province, PR China.,Hubei Key Laboratory of Cardiology, Wuhan 430060, Hubei Province, PR China
| | - He Huang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, PR China.,Cardiovascular Research Institute of Wuhan University, Wuhan, Hubei Province, PR China.,Hubei Key Laboratory of Cardiology, Wuhan 430060, Hubei Province, PR China
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Gorczynski RM, Kai Y, Miyake K. MD1 expression regulates development of regulatory T cells. THE JOURNAL OF IMMUNOLOGY 2006; 177:1078-84. [PMID: 16818764 DOI: 10.4049/jimmunol.177.2.1078] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Intense interest has centered around the role of a subset of regulatory T cells, CD4+CD25+ Treg, in controlling the development of autoimmune disorders, allograft rejection, infection, malignancy, and allergy. We previously reported that MD1, a molecule known to be important in regulation of expression of RP105, also was important in regulating alloimmunity, and that blockade of expression of MD1 diminished graft rejection in vivo. One mechanism by which an MD1-RP105 complex exerts an effect on immune responses is through interference with an LPS-derived signal delivered through the CD14-MD-2-TLR4 complex. We show below that LPS signaling for Treg induction occurs at higher LPS thresholds that for effector T cell responses. In addition, blockade of MD1 functional activity in dendritic cells (using anti-MD1 mAbs, MD1 antisense deoxyoligonucleotides, or responder cells from mice with deletion of the MD1 gene), resulted in elevated Treg induction in response to allogeneic stimulation (in vivo or in vitro) in the presence of LPS. These data offer one mechanistic explanation for the augmented immunosuppression described following anti-MD1 treatment.
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Affiliation(s)
- Reginald M Gorczynski
- Departments of Surgery and Immunology, University Health Network and the Toronto Hospital, 200 Elizabeth Street, Toronto, Ontario, Canada.
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Abstract
The membrane glycoprotein CD200, which has a widespread but defined distribution and a structurally similar receptor (CD200R) that transmits an inhibitory signal to cells of the hematopoetic lineage, especially myeloid cells, has been characterized. CD200R expression is restricted predominantly to cells of the myeloid lineage indicating that this ligand/receptor pair has a specific role in controlling myeloid cell function. In addition to CD200R, several related genes have been identified. Whether these gene products also regulate immune function is controversial. CD200R is also expressed by certain subsets of T cells and CD200 may be expressed by antigen-presenting cells, adding additional layers of complexity to the CD200/CD200R axis. Because monocytic myeloid cells provide a link between the innate and adaptive immune response, mechanisms to control their function through receptors such as CD200R will have therapeutic potential. Regulation of immune responses is accomplished by the concerted, but opposing, activity of kinases and phosphatases, fine control often being achieved through paired receptors. In this review, we will consider whether CD200R signaling functions within a framework of paired activating and inhibitory receptors and whether the inhibitory signal delivered has functional consequences beyond inhibition of myeloid cell proinflammatory activation.
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Affiliation(s)
- Konstantinos Minas
- Department of Ophthalmology, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen, UK AB25 2ZD
| | - Janet Liversidge
- Department of Ophthalmology, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen, UK AB25 2ZD
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