OBJECTIVE: To investigate the changes of knee menisci in osteoarthritis (OA) in human. METHODS: OA and control menisci were obtained from 42 end-stage OA knees with medial involvement and 28 non-arthritic knees of age-matched donors, respectively. The change of menisci in OA was evaluated by histology, and gene expression of major matrix components and anabolic factors was analyzed in the anterior horn segments by quantitative PCR (qPCR). In those regions of menisci, the rate of collagen neo-synthesis was evaluated by [(3)H]proline incorporation, and the change of matrix was investigated by ultrastructural observation and biomechanical measurement. RESULTS: In OA menisci, the change in histology was rather moderate in the anterior horn segments. However, despite the modest change in histology, the expression of type I, II, III procollagens was dramatically increased in those regions. The expression of insulin-like growth factor 1 (IGF-1) was markedly enhanced in OA menisci, which was considered to be responsible, at least partly, for the increase in procollagen gene expression. Interestingly, in spite of marked increase in procollagen gene expression, incorporation of [(3)H]proline increased only modestly in OA menisci, and impaired collagen synthesis was suggested. This finding was consistent with the results of ultrastructural observation and biomechanical measurement, which indicated that the change of meniscal matrix was modest in the macroscopically preserved areas of OA menisci. CONCLUSION: Although the expression of major matrix components was markedly enhanced, matrix synthesis was enhanced only modestly, and the changes of matrix in human OA menisci were rather modest in the non-degenerated areas. Copyright 2010 Osteoarthritis Research Society International. Published by Elsevier Ltd. All rights reserved.
OBJECTIVE: To investigate the changes of knee menisci in osteoarthritis (OA) in human. METHODS: OA and control menisci were obtained from 42 end-stage OA knees with medial involvement and 28 non-arthritic knees of age-matched donors, respectively. The change of menisci in OA was evaluated by histology, and gene expression of major matrix components and anabolic factors was analyzed in the anterior horn segments by quantitative PCR (qPCR). In those regions of menisci, the rate of collagen neo-synthesis was evaluated by [(3)H]proline incorporation, and the change of matrix was investigated by ultrastructural observation and biomechanical measurement. RESULTS: In OA menisci, the change in histology was rather moderate in the anterior horn segments. However, despite the modest change in histology, the expression of type I, II, III procollagens was dramatically increased in those regions. The expression of insulin-like growth factor 1 (IGF-1) was markedly enhanced in OA menisci, which was considered to be responsible, at least partly, for the increase in procollagen gene expression. Interestingly, in spite of marked increase in procollagen gene expression, incorporation of [(3)H]proline increased only modestly in OA menisci, and impaired collagen synthesis was suggested. This finding was consistent with the results of ultrastructural observation and biomechanical measurement, which indicated that the change of meniscal matrix was modest in the macroscopically preserved areas of OA menisci. CONCLUSION: Although the expression of major matrix components was markedly enhanced, matrix synthesis was enhanced only modestly, and the changes of matrix in human OA menisci were rather modest in the non-degenerated areas. Copyright 2010 Osteoarthritis Research Society International. Published by Elsevier Ltd. All rights reserved.
Authors: Qing Li; Basak Doyran; Laura W Gamer; X Lucas Lu; Ling Qin; Christine Ortiz; Alan J Grodzinsky; Vicki Rosen; Lin Han Journal: J Biomech Date: 2015-03-11 Impact factor: 2.712
Authors: A J Grodzinsky; R M Porter; A G Bajpayee; R E De la Vega; M Scheu; N H Varady; I A Yannatos; L A Brown; Y Krishnan; T J Fitzsimons; P Bhattacharya; E H Frank Journal: Eur Cell Mater Date: 2017-12-05 Impact factor: 3.942
Authors: C Pauli; S P Grogan; S Patil; S Otsuki; A Hasegawa; J Koziol; M K Lotz; D D D'Lima Journal: Osteoarthritis Cartilage Date: 2011-06-01 Impact factor: 6.576
Authors: Sven Nebelung; Lisa Dötsch; Dhaval Shah; Daniel Benjamin Abrar; Kevin Linka; Matthias Knobe; Philipp Sewerin; Johannes Thüring; Christiane Kuhl; Daniel Truhn Journal: Sci Rep Date: 2020-02-12 Impact factor: 4.379