软骨保护剂对Hartley豚鼠软骨组织和血清蛋白多糖的影响

目的观察软骨保护剂氨基葡萄糖(GS)和硫酸软骨素(CS)对原发性骨关节炎(OA)模型雌性Hartley豚鼠膝关节软骨组织结构、组织成分以及血清中蛋白多糖含量的影响。方法120只2月龄雌性Hartley豚鼠,随机分为三个试验组和一个空白对照组。三个试验组分别为:1g/kg bw GS组,0.5g/kg bw CS组,GS1g/kg bw+CS0.5g/kg bw联合使用组和蒸馏水对照组。自由饮水给予受试物,连续5个月。分别于给药前,给药1个月、2个月、3个月、4个月和5个月后,每组各取5只动物膝关节进行组织病理学(HE染色)和组织化学(PAS、Alcian Blue、和Mallory染色)检查以及血清蛋白多糖含量的检测。结果病理及组化检查:对照组在实验开始1个月后软骨组织病理积分即不断增高;GS组在给药三个月后才开始上升;CS组在给药的5个月中病理积分增高缓慢,仅第4个月上升较明显;联合使用组在给药的5个月中病理积分一直没有增高,并且给药5个月后的病理积分显著低于同组给药前期的积分。血清蛋白多糖含量:给药4个月后,GS组,CS组和联合使用组血清中蛋白多糖含量下降减少,与各自同期对照组相比差异均有显著性(P<0.05)。结论氨基葡萄糖和硫酸软骨素对豚鼠原发性软骨组织退化的发生、发展,以及血清蛋白多糖含量的下降均有延缓及抑制作用。并且以两者的联合作用最强,显现出一定的修复作用。

Effect of cartilage protective agents on histopathological, histochemical features of articular cartilage and serum level of aggrecan in Hartley guinea pigs

OBJECTIVE: To observe the effect of glucosamine (GS) and chondroitin sulfate (CS) on histopathological, histochemical features of articular cartilage and on the aggrecan serum level in Hartley guinea pigs: a kind of primary OA animal model. METHODS: 120 female Hartley guinea pigs aged 2 months were randomly divided into 3 test groups and a control group, 30 animals for each group. The three test groups refer to GS group, CS group and combined group. GS group has been administrated with 1 g/kg bw GS, CS group administrated with 0.5 g/kg bw CS, combined group with 1 g/kg bw GS + 0.5 g/kg bw CS and a control group administrated with distilled water. The above four substances were treated via ad limbitum for a period of 5 months. Before dosing and after each monthly treatment during the five months, knee joints Cartilage specimens from 5 guinea pigs each group were examined through histopathological method (H. E stain) and histopathological method (Alcain Blue, PAS and Mallory stain), and the serum levels of aggrecan were detected synchronously. RESULTS: During the entire 5 months period, distinct pathological lesions appeared just after the first month in control group. And the distinct pathological lesions didn't appear until the third month ended in GS group. In CS group, moderate pathological lesions were observed in the fourth month, while there were almost no obviously pathological changes in combined group during the whole test period. The serum levels of aggrecan in all three test groups were all decreased slower after 4 months treatment than those in the control group, with a significant difference (P < 0.05). CONCLUSION: GS and CS can postpone and inhibit the pathological changes of articular cartilage, as well as serum aggrecan levels decrease in Hartley guinea pigs. The effect of GS and CS used in combination was stronger than individual GS and CS, showing a repair property.