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Identification of histamine receptor subtypes in skeletal myogenesis.

Chen, Y. and Stegaev, V. and Kouri, V.P. and Sillat, T. and Chazot, P.L. and Stark, H. and Wen, J.G. and Konttinen, Y.T. (2015) 'Identification of histamine receptor subtypes in skeletal myogenesis.', Molecular medicine reports., 11 (4). pp. 2624-2630.


investigated in mouse skeletal myogenesis. Therefore, the present study aimed to investigate the HR‑subtypes in skeletal myogenesis. The myogenesis of C2C12 skeletal myoblasts was evaluated using desmin, myogenin and myosin heavy chain (Myh) as early, intermediate and late differentiation markers, respectively. Reverse transcription‑quantitative polymerase chain reaction and immunostaining were performed and the messenger RNA (mRNA) expression levels of the HR‑subtypes and markers were determined. H1R mRNA was found to be highly expressed in myoblasts at day 0; however, the expression levels were reduced as differentiation progressed. By contrast, H2R mRNA expression remained constant, while H3R mRNA expression increased by 28‑, 103‑ and 198‑fold at days 2, 4 and 6 compared with the baseline level (day 0), respectively. In addition, Myh expression increased by 7,718‑, 94,487‑ and 286,288‑fold on days 2, 4 and 6 compared with the baseline expression level (day 0). Weak positive staining of the cells for H3R protein was observed on day 2, whereas highly positive staining was observed on days 4 and 6. HR expression during myogenesis was, in part, regulated by the stage of differentiation. These results along with previous findings indicated possible involvement of H1R in the regulation of progenitor cell mitogenesis and of H2R in the relaxation of acetylcholine‑stimulated contraction of muscle cells, following the activation of professional histamine‑producing cells, including mast cells. By contrast, H3R may participate in the regulation of specialized myocyte functions, potentially by maintaining the relaxed state under the influence of constitutive H3R activity and low histamine concentrations, locally produced/released by non‑professional histamine‑producing cells.

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Publisher statement:Copyright: © Chen et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
Date accepted:20 November 2014
Date deposited:24 May 2016
Date of first online publication:10 December 2014
Date first made open access:No date available

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