ABSTRACT
Heat shock protein 90(Hsp90)is one of the most abundant molecular chaperones whose association is essential to maintain the stability and function of uumerous client proteins,and is the unique target protein for cancer therapy.Over the past years,most attention has been given to the study of the intracelhilar Hsp90.However,a pool of Hsp90 has been described to be present on the cell surface and even to be secreted extracellularly,which plays an important role in modulating cancer cell invasion in vitro and metastasis in vivo.
ABSTRACT
Objective To investigate the expression of type Ⅱ collagen in the articular chondrocyte of osteoarthritis (OA) patients and normal human. Methods The samples of articular cartilage were obtained from the patients undergoing total joint replacement, including 8 primary OA patients, 8 secondary OA patients and 9 normal subjects. Type Ⅱ collagen expression in chondrocyte was detected by reverse transcriptase polymerase chain reaction (RT-PCR). Results The expressin of type Ⅱ collagen mRNA in normal OA group was higher than that in primary OA group and secondary OA group with a statistical difference (P=0.014), while there was no statistical difference between primary OA group and secondary OA group(P=0.716). Conclusions The reduction of type Ⅱ collagen expression leads to the change of collagen directly and possibly plays an important role in OA, which is the common pathway of the occurrence of both the primary and secondary OA.