Subcellular Localization of Connexin 26 in Cardiomyocytes and in Cardiomyocyte-Derived Extracellular Vesicles
| Autor: | Margherita Bernardeschi, Antonella Cecchettini, Alessandra Falleni, Stefania Moscato, Letizia Mattii, Francesco Bianchi, Antonietta Raffaella Maria Sabbatini |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Immunoelectron microscopy
Cell Pharmaceutical Science Connexin Organic chemistry cardiomyocyte Article Analytical Chemistry Cell Line QD241-441 Cardiomy-ocyte immunoelectron microscopy Drug Discovery medicine otorhinolaryngologic diseases Animals Myocytes Cardiac Physical and Theoretical Chemistry Tissue homeostasis Chemistry Gap junction Connexin26 Extracellular vesicles H9c2 cells Rat heart Ultrastructure Gap Junctions Immunogold labelling Subcellular localization ultrastructure Cell biology Rats Connexin 26 medicine.anatomical_structure connexin26 Chemistry (miscellaneous) cardiovascular system rat heart Molecular Medicine |
| Zdroj: | Molecules, Vol 26, Iss 6726, p 6726 (2021) Molecules Volume 26 Issue 21 |
| ISSN: | 1420-3049 |
| Popis: | Connexins (Cxs) are a family of membrane-spanning proteins, expressed in vertebrates and named according to their molecular weight. They are involved in tissue homeostasis, and they function by acting at several communication levels. Cardiac Cxs are responsible for regular heart function and, among them, Cx26 and Cx43 are widely expressed throughout the heart. Cx26 is present in vessels, as well as in cardiomyocytes, and its localization is scattered all over the cell aside from at the intercalated discs as is the case for the other cardiac Cxs. However, having been found in cardiomyocytes only recently, both its subcellular localization and its functional characterization in cardiomyocytes remain poorly understood. Therefore, in this study we aimed to obtain further data on the localization of Cx26 at the subcellular level. Our TEM immunogold analyses were performed on rat heart ventricles and differentiated H9c2 cardiac cell sections as well as on differentiated H9c2 derived extracellular vesicles. The results confirmed the absence of Cx26 at intercalated discs and showed the presence of Cx26 at the level of different subcellular compartments. The peculiar localization at the level of extracellular vesicles suggested a specific role for cardiac Cx26 in inter-cellular communication in an independent gap junction manner. |
| Databáze: | OpenAIRE |
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