Nwosu BU, Nilsson O, Mitchum RD, Coco M, Barnes KM, Baron J. Lack of telomere shortening with age in mouse resting zone chondrocytes.
HORMONE RESEARCH 2005;
63:125-8. [PMID:
15795509 DOI:
10.1159/000084687]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2004] [Accepted: 02/01/2005] [Indexed: 11/19/2022]
Abstract
BACKGROUND AND AIM
Telomeres are hexameric repeat sequences that flank eukaryotic chromosomes. The telomere hypothesis of cellular aging proposes that replication of normal somatic cells leads to progressive telomere shortening which induces replicative senescence. Previous studies suggest that growth plate chondrocytes have a finite proliferative capacity in vivo. We therefore hypothesized that telomere shortening in resting zone chondrocytes leads to replicative senescence.
METHOD
To test this hypothesis we compared the telomere restriction fragment (TRF) length of Mus casteneus at 1, 4, 8, and 56 weeks of age.
RESULTS AND CONCLUSIONS
We found that TRF length did not diminish measurably with age, suggesting that telomere shortening in resting zone chondrocytes is not the mechanism that limits proliferation of growth plate chondrocytes in vivo.
Collapse