Abstract:
:Immortalized cloned human chondrocytes isolated from a normal (Ch-4, 8, N) and an osteoarthritis patient (Ch-8-OA) were established by introduction of recombinant SV40-adenovirus vector containing SV40 early gene. These cells exhibited continuous proliferative capacity in monolayer culture and showed chondrocytic characteristics in that they were positive for alkaline phosphatase and collagen type II. When cells were treated with IL-1alpha, the growth was inhibited. IL-1alpha induced the production of IL-6, GM-CSF and TNFalpha from immortalized chondrocytes. Significantly high amounts of cytokines including IL-6, GM-CSF and TNFalpha were produced from Ch-8-OA cells, even in the absence of IL-1alpha stimulation. Interestingly, TNFalpha, exogenously added into the culture, inhibited the growth of Ch-8-OA cells. Further studies are required to clarify the different mechanisms on chondrocytes originating from osteoarthritis cartilage underlying the biological reaction to various cytokines and the production of these cytokines as compared with chondrocytes from normal cartilages. However, the novel chondrocyte cell lines established in the present study may provide researchers with a useful model for studying the pathogenesis of osteoarthritis.
journal_name
Int J Mol Medjournal_title
International journal of molecular medicineauthors
Yoshimatsu T,Saitoh A,Ryu JN,Shima D,Handa H,Hiramoto M,Kawakami Y,Aizawa Sdoi
10.3892/ijmm.8.4.345subject
Has Abstractpub_date
2001-10-01 00:00:00pages
345-51issue
4eissn
1107-3756issn
1791-244Xjournal_volume
8pub_type
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