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Yamaji D, Soliman MM, Kamikawa A, Ito T, Ahmed MM, Okamatsu-Ogura Y, Saito M, Kimura K. Species-specific control of hepatocyte growth factor expression and production in adipocytes in a differentiation-dependent manner. Domest Anim Endocrinol 2018; 62:39-48. [PMID: 29040876 DOI: 10.1016/j.domaniend.2017.09.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 08/22/2017] [Accepted: 09/06/2017] [Indexed: 01/09/2023]
Abstract
Hepatocyte growth factor (HGF) is a mesenchymal cell-derived factor that regulates cell growth, cell motility, and morphogenesis. Since there are conflicting reports on HGF-producing cells, we herein examined HGF activity in conditioned medium (CM) of bovine and mouse preadipocytes before and after adipogenic differentiation. CM of bovine adipocytes and mouse preadipocytes induced the morphogenesis of mammary epithelial cells that was inhibited by an NK4 HGF antagonist, whereas CM of bovine preadipocytes and mouse adipocytes did not. HGF mRNA expression was increased by a treatment with dexamethasone and isobutylmethylxanthine in bovine as well as human cells, whereas it was decreased in rodent cells. It was unfortunate that HGF gene promoter activity failed to reflect HGF mRNA expression in these cells. After actinomycin D treatment, expression of HGF mRNA remained stable in pre- and differentiated bovine adipocytes and mouse preadipocytes, whereas rapidly decreased in mouse-differentiated adipocytes. These results indicate that expression and production of HGF are regulated in a species-specific adipogenic differentiation-dependent manner and suggest that the decrease in HGF mRNA in mouse differentiated adipocytes is, at least in part, mediated by differentiation-dependent loss of its stability.
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Affiliation(s)
- D Yamaji
- Laboratory of Biochemistry, Department of Biomedical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
| | - M M Soliman
- Laboratory of Biochemistry, Department of Biomedical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
| | - A Kamikawa
- Laboratory of Biochemistry, Department of Biomedical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
| | - T Ito
- Laboratory of Biochemistry, Department of Biomedical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
| | - M M Ahmed
- Laboratory of Biochemistry, Department of Biomedical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
| | - Y Okamatsu-Ogura
- Laboratory of Biochemistry, Department of Biomedical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
| | - M Saito
- Laboratory of Biochemistry, Department of Biomedical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
| | - K Kimura
- Laboratory of Biochemistry, Department of Biomedical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan.
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Tang R, Ma F, Li W, Ouyang S, Liu Z, Wu J. miR-206-3p Inhibits 3T3-L1 Cell Adipogenesis via the c-Met/PI3K/Akt Pathway. Int J Mol Sci 2017; 18:ijms18071510. [PMID: 28708070 PMCID: PMC5536000 DOI: 10.3390/ijms18071510] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 07/06/2017] [Accepted: 07/06/2017] [Indexed: 12/16/2022] Open
Abstract
MicroRNAs (miRNAs) are important post-transcriptional regulators during adipocyte adipogenesis. MiR-206-3p, a tissue-specific miRNA, is absent in white adipocytes. In this study, we examined the roles of mmu-miR-206-3p in the adipogenic differentiation of 3T3-L1 preadipocytes. The miR-206-3p expression has shown an apparent decreasing trend after induction, and sustained low expression throughout the differentiation of 3T3-L1 cells. miR-206-3p blocked the adipogenic differentiation of 3T3-L1 cells by attenuating c-Met expression; the inhibition effect of miR-206 to the adipogenic differentiation can be counteracted by restoring c-Met expression. In addition, miR-206-3p decreased the phosphorylation of Akt, which is the downstream effector of c-Met in the PI3K/Akt signaling pathway. These data indicate that miR-206-3p inhibits adipocyte adipogenesis through silencing c-Met and subsequently inactivating the PI3K/Akt signaling pathway.
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Affiliation(s)
- Renqiao Tang
- Graduate School of Peking Union Medical College, NO. 9, Dongdansantiao, Dongcheng District, Beijing 100730, China.
- Department of Biochemistry, Capital Institute of Pediatrics, NO. 2, Yabao Road, Chaoyang District, Beijing 100020, China.
| | - Feifei Ma
- Department of Biochemistry, Capital Institute of Pediatrics, NO. 2, Yabao Road, Chaoyang District, Beijing 100020, China.
| | - Wei Li
- Graduate School of Peking Union Medical College, NO. 9, Dongdansantiao, Dongcheng District, Beijing 100730, China.
- Department of Biochemistry, Capital Institute of Pediatrics, NO. 2, Yabao Road, Chaoyang District, Beijing 100020, China.
| | - Shengrong Ouyang
- Department of Biochemistry, Capital Institute of Pediatrics, NO. 2, Yabao Road, Chaoyang District, Beijing 100020, China.
| | - Zhuo Liu
- Department of Biochemistry, Capital Institute of Pediatrics, NO. 2, Yabao Road, Chaoyang District, Beijing 100020, China.
| | - Jianxin Wu
- Graduate School of Peking Union Medical College, NO. 9, Dongdansantiao, Dongcheng District, Beijing 100730, China.
- Department of Biochemistry, Capital Institute of Pediatrics, NO. 2, Yabao Road, Chaoyang District, Beijing 100020, China.
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Zhang YQ, Hu SY, Chen YD, Guo MZ, Wang S. Hepatocyte growth factor inhibits hypoxia/reoxygenation-induced activation of xanthine oxidase in endothelial cells through the JAK2 signaling pathway. Int J Mol Med 2016; 38:1055-62. [PMID: 27573711 PMCID: PMC5029971 DOI: 10.3892/ijmm.2016.2708] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 07/19/2016] [Indexed: 11/05/2022] Open
Abstract
Vascular endothelial cells (ECs) appear to be one of the primary targets of hypoxia/reoxygenation (H/R) injury. In our previous study, we demonstrated that hepatocyte growth factor (HGF) exhibited a protective effect in cardiac microvascular endothelial cells (CMECs) subjected to H/R by inhibiting xanthine oxidase (XO) by reducing the cytosolic Ca2+ concentration increased in response to H/R. The precise mechanisms through which HGF inhibits XO activation remain to be determined. In the present study, we examined the signaling pathway through which HGF regulates Ca2+ concentrations and the activation of XO during H/R in primary cultured rat CMECs. CMECs were exposed to 4 h of hypoxia and 1 h of reoxygenation. The protein expression of XO and the activation of the phosphoinositide 3-kinase (PI3K), janus kinase 2 (JAK2) and p38 mitogen-activated protein kinase (p38 MAPK) signaling pathways were detected by western blot analysis. Cytosolic calcium (Ca2+) concentrations and reactive oxygen species (ROS) levels were measured by flow cytometry. The small interfering RNA (siRNA)‑mediated knockdown of XO inhibited the increase in ROS production induced by H/R. LY294002 and AG490 inhibited the H/R-induced increase in the production and activation of XO. The PI3K and JAK2 signaling pathways were activated by H/R. The siRNA‑mediated knockdown of PI3K and JAK2 also inhibited the increase in the production of XO protein. HGF inhibited JAK2 activation whereas it had no effect on PI3K activation. The siRNA-mediated knockdown of JAK2 prevented the increase in cytosolic Ca2+ induced by H/R. Taken together, these findings suggest that H/R induces the production and activation of XO through the JAK2 and PI3K signaling pathways. Furthermore, HGF prevents XO activation following H/R primarily by inhibiting the JAK2 signaling pathway and in turn, inhibiting the increase in cytosolic Ca2+.
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Affiliation(s)
- Ying Qian Zhang
- Department of Cardiology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Shun Ying Hu
- Department of Cardiology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Yun Dai Chen
- Department of Cardiology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Ming Zhou Guo
- Department of Gastroenterology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Shan Wang
- Central Laboratory, Chinese PLA General Hospital, Beijing 100853, P.R. China
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Mendonça F, Soares R. Obesity and cancer phenotype: Is angiogenesis a missed link? Life Sci 2015; 139:16-23. [PMID: 26297445 DOI: 10.1016/j.lfs.2015.08.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 07/28/2015] [Accepted: 08/14/2015] [Indexed: 12/13/2022]
Abstract
Obesity remains nowadays one of the main threats to human health, being a problem of worldwide proportions. It is characterized by augmented storage of fatty acids in an enlarged adipose tissue. This process is possible thanks to a rich capillary network, supported by a mechanism that has also a crucial role on cancer: angiogenesis. Given that several studies point obesity as a risk factor for cancer development, angiogenesis may be approached as the missed link between these two pathologies. Understanding the different pathways behind angiogenesis becomes essential to break this link by developing new anti-angiogenic therapies or improving the actual ones. In the first phase, this paper will focus the structural and cellular changes that adipose tissue suffers in obesity. Then, the main pro-angiogenic players will be reviewed, taking into account the pathways that explain their putative role in obesity-cancer link. Finally, the clinical implications of the presented mechanisms will also be regarded, being the main focus on the anti-angiogenic therapies.
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Affiliation(s)
- Fernando Mendonça
- Department of Biochemistry, Faculty of Medicine, University of Porto, Portugal
| | - Raquel Soares
- Department of Biochemistry, Faculty of Medicine, University of Porto, Portugal; Instituto de Investigação e Inovação em Saúde da Universidade do Porto, Portugal.
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