Effects of rhidosin on expression of fibroblast growth factor onolfactory bulb in rats and its relation with senile hyposmia

Objectives To determine the expression of fibroblast growth factor (FGF) on olfactory bulb in rats and its relation with senile hyposmia, and to discuss the effects of rhidosin on expression of FGF on olfactory bulb in senile rats and its significance Methods Four groups of rats, ie, young group, senile group, rhidosin group, and physiological saline control group were used in this study After the removal of the heads of these rats, olfactory mucosa and olfactory bulbs were immediately fixed with neutral formalin, followed with paraffin embedding, serial sectioning, immunohistochemical staining and light microscopic observation Results The positive expression rate of FGF on olfactory bulb in young group was significantly higher than that in senile group (P<0 01) The positive expression rate of FGF on olfactory bulb in rhidosin group was significantly higher than that in physiological saline control group (P<0 01) No positive expression of FGF on olfactory mucosa was observed in these four groups Conclusion These results suggest that the expression of FGF on olfactory bulb gradually decline with aging The decrease of expression of FGF on olfactory bulb may play a key role in the occurrence of senile hyposmia Rhidosin can increase the expression of FGF on olfactory bulbs in senile rats and this may be one of the mechanisms by which rhidosin promotes the growth of olfactory cells and inhibits aging effects on the olfactory system

红景天素对老龄大鼠嗅球中成纤维细胞生长因子表达的影响及意义

目的 探讨红景天素对老龄大鼠嗅球中成纤维细胞生长因子（ｆｉｂｒｏｂｌａｓｔｇｒｏｗｔｈ ｆａｃｔｏｒ，ＦＧＦ）表达的影响及意义。方法 将２０ 只老龄大鼠随机分成注射红景天素实验组（１０ 只） 和注射等量生理盐水对照组（１０ 只）。分别取嗅球和嗅粘膜，经石蜡包埋，连续切片，免疫组化染色，光镜观察。结果 实验组嗅球中ＦＧＦ阳性表达率明显高于对照组（ Ｐ＜ ０．０１） ，而２ 组嗅粘膜均未见ＦＧＦ表达。结论 红景天素能够提高老龄大鼠嗅球中ＦＧＦ的阳性表达率，提示其对嗅系统可能具有抗衰老作用。