1
|
Cefis M, Chaney R, Quirié A, Santini C, Marie C, Garnier P, Prigent-Tessier A. Endothelial cells are an important source of BDNF in rat skeletal muscle. Sci Rep 2022; 12:311. [PMID: 35013359 PMCID: PMC8748777 DOI: 10.1038/s41598-021-03740-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 12/09/2021] [Indexed: 12/27/2022] Open
Abstract
BDNF (brain-derived neurotrophic factor) is present in skeletal muscle, controlling muscular metabolism, strength and regeneration processes. However, there is no consensus on BDNF cellular source. Furthermore, while endothelial tissue expresses BDNF in large amount, whether endothelial cells inside muscle expressed BDNF has never been explored. The aim of the present study was to provide a comprehensive analysis of BDNF localization in rat skeletal muscle. Cellular localization of BDNF and activated Tropomyosin-related kinase B (TrkB) receptors was studied by immunohistochemical analysis on soleus (SOL) and gastrocnemius (GAS). BDNF and activated TrkB levels were also measured in muscle homogenates using Western blot analysis and/or Elisa tests. The results revealed BDNF immunostaining in all cell types examined with a prominent staining in endothelial cells and a stronger staining in type II than type I muscular fibers. Endothelial cells but not other cells displayed easily detectable activated TrkB receptor expression. Levels of BDNF and activated TrkB receptors were higher in SOL than GAS. In conclusion, endothelial cells are an important and still unexplored source of BDNF present in skeletal muscle. Endothelial BDNF expression likely explains why oxidative muscle exhibits higher BDNF levels than glycolytic muscle despite higher the BDNF expression by type II fibers.
Collapse
Affiliation(s)
- Marina Cefis
- INSERM UMR1093-CAPS, Université Bourgogne Franche-Comté, UFR Des Sciences de Santé, 21000, Dijon, France
| | - Remi Chaney
- INSERM UMR1093-CAPS, Université Bourgogne Franche-Comté, UFR Des Sciences de Santé, 21000, Dijon, France
| | - Aurore Quirié
- INSERM UMR1093-CAPS, Université Bourgogne Franche-Comté, UFR Des Sciences de Santé, 21000, Dijon, France
| | - Clélia Santini
- INSERM UMR1093-CAPS, Université Bourgogne Franche-Comté, UFR Des Sciences de Santé, 21000, Dijon, France
| | - Christine Marie
- INSERM UMR1093-CAPS, Université Bourgogne Franche-Comté, UFR Des Sciences de Santé, 21000, Dijon, France
| | - Philippe Garnier
- INSERM UMR1093-CAPS, Université Bourgogne Franche-Comté, UFR Des Sciences de Santé, 21000, Dijon, France
- Département Génie Biologique, IUT, 21000, Dijon, France
| | - Anne Prigent-Tessier
- INSERM UMR1093-CAPS, Université Bourgogne Franche-Comté, UFR Des Sciences de Santé, 21000, Dijon, France.
- UFR Des Sciences de Santé, 7 boulevard Jeanne d'Arc, 21078, Dijon, France.
| |
Collapse
|