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Omentin-A Novel Adipokine in Respiratory Diseases.

ABSTRACT: Adipokines, secreted by the adipose tissue, are extensively involved in the regulation and maintenance of various physiological and pathological processes, including insulin sensitivity, energy expenditure, glucose and lipid metabolism, inflammatory activity, neuroendocrine activity, immunity, cancer, homeostasis, angiogenesis, cardiovascular function, breeding and bone metabolism, and all functions of the endocrine-reproductive system axis. Omentin is a recently identified adipokine, which has become a research hotspot due to its pleiotropic effects on various diseases. However, the specific receptor for omentin has not been identified so far. In this study, we report that omentin levels fluctuate in various diseases. In addition, we have focused on the pleiotropic roles of omentin in pulmonary diseases, as it may act as a biomarker for malignant pleural mesothelioma (MPM) and is related to disease severity. Omentin may play significant roles in other pulmonary diseases, such as asthma, obstructive sleep apnea syndrome (OSAS), pulmonary arterial hypertension (PAH), acute respiratory distress syndrome (ARDS), and chronic obstructive pulmonary disease (COPD). This review summarizes the advances in current knowledge and future trends, which may provide a concise and general view on omentin and its effects on pulmonary biology.

SUBMITTER: Zhou Y

PROVIDER: S-EPMC5796023 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature

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Omentin-A Novel Adipokine in Respiratory Diseases.

Zhou Yan Y Zhang Bo B Hao Caixia C Huang Xiaoting X Li Xiaohong X Huang Yanhong Y Luo Ziqiang Z

International journal of molecular sciences 20171228 1

Adipokines, secreted by the adipose tissue, are extensively involved in the regulation and maintenance of various physiological and pathological processes, including insulin sensitivity, energy expenditure, glucose and lipid metabolism, inflammatory activity, neuroendocrine activity, immunity, cancer, homeostasis, angiogenesis, cardiovascular function, breeding and bone metabolism, and all functions of the endocrine-reproductive system axis. Omentin is a recently identified adipokine, which has ...[more]

PMID: 29283409

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Project description:Omentin-1, a 34-kDa protein, has been demonstrated to be associated with colorectal cancer (CRC). Epidemiological and clinical studies have indicated that the levels of circulating omentin-1 are significantly increased in patients with CRC, but the cause of the high omentin-1 levels and whether CRC cells express this adipokine have not been determined. In the present study, human colorectal carcinoma and para-carcinoma tissues were collected from 24 patients with CRC. In addition, SW480 and HCT116 colon cancer cells were cultured in vitro. The expression and localization of omentin-1 protein in human CRC and para-carcinoma tissues were determined by immunohistochemistry. The mRNA and protein expression levels of omentin-1 in human CRC and para-carcinoma tissues were detected by reverse transcription-quantitative PCR (RT-qPCR) and western blotting, respectively. In addition, omentin-1 mRNA expression levels in SW480 and HCT116 cell lines were detected by RT-qPCR. Since SW480 cells exhibited higher omentin-1 mRNA levels compared with those of HCT116 cells, SW480 cells were selected for further experiments. The expression of omentin-1 protein in the supernatant and lysate of SW480 cells obtained at 6, 12, 24 and 48 h was determined by ELISA. The immunohistochemistry results demonstrated that the positive expression of omentin-1 protein was mainly located in the cytoplasm of cancer cells in human CRC tissues. The mRNA and protein expression levels of omentin-1 in the CRC tissues were higher compared with those in para-carcinoma tissues. The expression levels of omentin-1 were detected in the cell lysate and supernatant of SW480 cells; the expression level of omentin-1 protein in the cell lysate was higher compared with that in the supernatant. These results indicated that SW480 cells secret and express the adipokine omentin-1 endogenously. Omentin-1 may serve its potential carcinogenetic role in CRC through endocrine, autocrine and paracrine pathways.

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Omentin-A Novel Adipokine in Respiratory Diseases.

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Omentin-A Novel Adipokine in Respiratory Diseases.

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