TY - JOUR
T1 - Pericyte transplantation improves skeletal muscle recovery following hindlimb immobilization
AU - Munroe, Michael
AU - Dvoretskiy, Svyatoslav
AU - Lopez, Amber
AU - Leong, Jiayu
AU - Dyle, Michael C.
AU - Kong, Hyunjoon
AU - Adams, Christopher M.
AU - Boppart, Marni D.
N1 - Publisher Copyright:
© FASEB
PY - 2019/6/1
Y1 - 2019/6/1
N2 - Conditions of extended bed rest and limb immobilization can initiate rapid and significant loss of skeletal muscle mass and function. Physical rehabilitation is standard practice following a period of disuse, yet mobility may be severely compromised, and recovery is commonly delayed or incomplete in special populations. Thus, a novel approach toward recovery of muscle mass is highly desired. Pericytes [neuron-glial antigen 2 (NG2)+CD31−CD45−(Lineage− [Lin−]) and CD146+Lin−] demonstrate capacity to facilitate muscle repair, yet the ability to enhance myofiber growth following disuse is unknown. In the current study, 3–4-mo-old mice were unilaterally immobilized for 14 d (IM) or immobilized for 14 d followed by 14 d of remobilization (RE). Flow cytometry and targeted gene expression analyses were completed to assess pericyte quantity and function following IM and RE. In addition, a transplantation study was conducted to assess the impact of pericytes on recovery. Results from targeted analyses suggest minimal impact of disuse on pericyte gene expression, yet NG2+Lin− pericyte quantity is reduced following IM (P < 0.05). Remarkably, pericyte transplantation recovered losses in myofiber cross-sectional area and the capillary-to-fiber ratio following RE, whereas deficits remained with vehicle alone (P = 0.01). These findings provide the first evidence that pericytes effectively rehabilitate skeletal muscle mass following disuse atrophy.—Munroe, M., Dvoretskiy, S., Lopez, A., Leong, J., Dyle, M. C., Kong, H., Adams, C. M., Boppart, M. D. Pericyte transplantation improves skeletal muscle recovery following hindlimb immobilization. FASEB J. 33, 7694–7706 (2019). www.fasebj.org.
AB - Conditions of extended bed rest and limb immobilization can initiate rapid and significant loss of skeletal muscle mass and function. Physical rehabilitation is standard practice following a period of disuse, yet mobility may be severely compromised, and recovery is commonly delayed or incomplete in special populations. Thus, a novel approach toward recovery of muscle mass is highly desired. Pericytes [neuron-glial antigen 2 (NG2)+CD31−CD45−(Lineage− [Lin−]) and CD146+Lin−] demonstrate capacity to facilitate muscle repair, yet the ability to enhance myofiber growth following disuse is unknown. In the current study, 3–4-mo-old mice were unilaterally immobilized for 14 d (IM) or immobilized for 14 d followed by 14 d of remobilization (RE). Flow cytometry and targeted gene expression analyses were completed to assess pericyte quantity and function following IM and RE. In addition, a transplantation study was conducted to assess the impact of pericytes on recovery. Results from targeted analyses suggest minimal impact of disuse on pericyte gene expression, yet NG2+Lin− pericyte quantity is reduced following IM (P < 0.05). Remarkably, pericyte transplantation recovered losses in myofiber cross-sectional area and the capillary-to-fiber ratio following RE, whereas deficits remained with vehicle alone (P = 0.01). These findings provide the first evidence that pericytes effectively rehabilitate skeletal muscle mass following disuse atrophy.—Munroe, M., Dvoretskiy, S., Lopez, A., Leong, J., Dyle, M. C., Kong, H., Adams, C. M., Boppart, M. D. Pericyte transplantation improves skeletal muscle recovery following hindlimb immobilization. FASEB J. 33, 7694–7706 (2019). www.fasebj.org.
KW - capillary
KW - disuse atrophy
KW - growth
KW - muscle
KW - rehabilitation
KW - stem cells
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UR - http://www.scopus.com/inward/citedby.url?scp=85067267368&partnerID=8YFLogxK
U2 - 10.1096/fj.201802580R
DO - 10.1096/fj.201802580R
M3 - Article
C2 - 31021652
AN - SCOPUS:85067267368
SN - 0892-6638
VL - 33
SP - 7694
EP - 7706
JO - FASEB Journal
JF - FASEB Journal
IS - 6
ER -