Retained Myogenic Potency of Human Satellite Cells from Torn Rotator Cuff Muscles Despite Fatty Infiltration.

Retained Myogenic Potency of Human Satellite Cells from Torn Rotator Cuff Muscles Despite Fatty Infiltration.
Tohoku J Exp Med. 2018;244(1):15-24
Authors: Koide M, Hagiwara Y, Tsuchiya M, Kanzaki M, Hatakeyama H, Tanaka Y, Minowa T, Takemura T, Ando A, Sekiguchi T, Yabe Y, Itoi E
Abstract
Rotator cuff tears (RCTs) are a common shoulder problem in the elderly that can lead to both muscle atrophy and fatty infiltration due to less physical load. Satellite cells, quiescent cells under the basal lamina of skeletal muscle fibers, play a major role in muscle regeneration. However, the myogenic potency of human satellite cells in muscles with fatty infiltration is unclear due to the difficulty in isolating from small samples, and the mechanism of the progression of fatty infiltration has not been elucidated. The purpose of this study was to analyze the population of myogenic and adipogenic cells in disused supraspinatus (SSP) and intact subscapularis (SSC) muscles of the RCTs from the same patients using fluorescence-activated cell sorting. The microstructure of the muscle with fatty infiltration was observed as a whole mount condition under multi-photon microscopy. Myogenic differentiation potential and gene expression were evaluated in satellite cells. The results showed that the SSP muscle with greater fatty infiltration surrounded by collagen fibers compared with the SSC muscle under multi-photon microscopy. A positive correlation was o...

Source: The Tohoku Journal of Experimental Medicine - January 10, 2018 Category: Research Authors: Koide M, Hagiwara Y, Tsuchiya M, Kanzaki M, Hatakeyama H, Tanaka Y, Minowa T, Takemura T, Ando A, Sekiguchi T, Yabe Y, Itoi E Tags: Tohoku J Exp Med Source Type: research