RT Journal Article
SR Electronic
T1 Age-dependent changes in protein incorporation into collagen-rich tissues of mice by in vivo pulsed SILAC labelling
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 2021.01.13.426496
DO 10.1101/2021.01.13.426496
A1 Yoanna Ariosa-Morejon
A1 Alberto Santos
A1 Roman Fischer
A1 Simon Davis
A1 Philip Charles
A1 Rajesh Thakker
A1 Angus Wann
A1 Tonia L. Vincent
YR 2021
UL http://biorxiv.org/content/early/2021/01/13/2021.01.13.426496.abstract
AB Collagen-rich tissues have poor reparative capacity that is further impaired with age, predisposing to common age-related disorders such as osteoporosis and osteoarthritis. We used in vivo pulsed SILAC labelling to quantify new protein incorporation into cartilage, bone, skin and plasma of mice across the life course. We report highly dynamic matrisome turnover in bone and cartilage during skeletal maturation, which was markedly reduced after skeletal maturity. Comparing young adult with older adult mice, new protein incorporation was reduced in all tissues. STRING clustering revealed epigenetic modulation across all tissues, a decline in chondroprotective growth factors such as FGF2 and TGFb in cartilage, and clusters indicating mitochondrial dysregulation and reduced collagen synthesis in bone. Several of these pathways have been associated with age-related disease. Fewer changes were observed for skin and plasma. This methodology provides dynamic protein data at a tissue level, uncovering age-related molecular changes that may predispose to disease.Competing Interest StatementThe authors have declared no competing interest.