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ÖÐͼ·ÖÀàºÅ:R392.114
ÎÄÏ×±êʶÂë:A
ÎÄÕ±àºÅ:1673-8225
(2008)15-02829-05

ÊÕ¸åÈÕÆÚ£º2007-09-13 ÐÞ»ØÈÕÆÚ£º2007-12-15
(07-50-9-5024/WL¡¤A)


Influence of interferon-gamma in combination with methylprednisolone on the proliferation of human embryonic lung fibroblast

Abstract


AIM:The pathogenesis of interstitial lung disease is still uncertain. This study observed the effect of interferon-gamma (IFN-¦Ã) in combination with methylprednisolone (M-pred) on the proliferation of human embryonic lung fibroblast (HELF) to identify whether it can be used as an effective treatment of interstitial lung disease in clinic.
METHODS: The experiment was performed at the Research Laboratory of Cytobiology, Hebei Medical University from July 2005 to May 2006. ¢ÙThe eighth passage HELFs were cultured in vitro. According to the common dose range for human of IFN-¦Ã and M-pred, cells were divided into control group, M-pred (15 mg/L) group, IFN-¦Ã (250, 500, 750, 1 000, 1 250 U/mL) groups and combination group (IFN-¦Ã and M-pred). ¢ÚHELFs were incubated with IFN-¦Ã alone or combined with M-pred for 48 hours before they were harvested. ¢ÛMTT assay was used to measure the inhibition rate of M-pred combined with different concentrations of IFN-¦Ã on HELF. Flow cytometry was used to observe cell cycle distribution and the proliferation index of HELF. The expression of proliferating cell nuclear antigen (PCNA) was detected by immunocytochemistry.
RESULTS: ¢ÙBoth alone and combination usage of IFN-¦Ã and M-pred could inhibit HELF proliferation (P < 0.05), and there was promotion, even synergistic effect in combination group (Q > 0.85). ¢Ú IFN-¦Ã mainly acted on G1 and G2M periods, while M-pred on S period. The proliferation index decreased in combination group (P < 0.05). ¢ÛBoth alone and combination usage of IFN-¦Ã and M-pred could inhibit PCNA expression (P < 0.05), and the inhibitory effect was stronger in IFN-¦Ã and M-pred combination group (P < 0.05).
CONCLUSION: Both IFN-¦Ã and M-pred can inhibit the proliferation of HELF. There is synergism in the combination of IFN-¦Ã and M-pred. The anti-fibrous degeneration effect of combination usage may be better than alone usage of IFN-¦Ã or M-pred.

Li XM, Zhai LD. Influence of interferon-gamma in combination with methylprednisolone on the proliferation of human embryonic lung fibroblast.Zhongguo Zuzhi Gongcheng Yanjiu yu Linchuang Kangfu 2008;12(15):2829-2833(China)
[www.zglckf.com/zglckf/ejournal/upfiles/08-15/15k-2829(ps).pdf]

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