癌毒清颗粒对肝癌模型小鼠HIF-1α、VEGF、bFGF的影响

目的:研究癌毒清颗粒(AG)对肝癌(HCC)模型小鼠HIF-1α、VEGF、bFGF的影响,探讨AG抗HCC的作用机制。方法:昆明小鼠50只,腋下接种H22肝癌细胞,建立肝癌异位移植瘤模型。于接种24h后,将动物随机分为模型组,AG高、中、低剂量组,氟尿嘧啶组。AG各组给予AG灌胃,氟尿嘧啶组腹腔注射氟尿嘧啶。给药12d后,摘取眼球采血,剥取瘤组织,称取瘤重,瘤组织进行病理组织学检查;ELISA法检测小鼠血清中HIF-1α、VEGF、bFGF的水平。结果:H22肝癌小鼠异位移植瘤模型中,各组体重变化无统计学意义(P>0.05)。AG高、中、低剂量组抑瘤率分别为50.91%,35.25%,20.10%,氟尿嘧啶组为43.99%,与模型组比较差异有统计学意义(P<0.05),其中AG高剂量组抑瘤效果最佳。与模型组比较,各组小鼠血清HIF-1α、VEGF、bFGF浓度均下降,差异有统计学意义(P<0.05)。病理组织显示,AG三组肝癌细胞大小不等,肝癌细胞密度减少,肝癌细胞排列较分散,间质新生血管分布较少,肿瘤细胞坏死数量较多,细胞核着色欠均匀。结论:癌毒清颗粒能遏制H22肝癌小鼠异位移植瘤的生长,遏制程度和药物的剂量有关。癌毒清颗粒抗癌作用机制之一可能是通过下调缺氧微环境中血管生成促进因子VEGF、HIF-α、bFGF的表达,遏制肝癌移植瘤微血管生成。

The association between IgG1,IgG2 subclasses toward human papillomavirus 16-like particles in the serum and cervical intraepithelial neoplasia

Objective:The paper aimed to study the relationship between the expressions of immunoglobulin G(IgG) subclasses toward human papillomavirus 16-like particles(HPV16VLPs) in the serum of patients and different grades of cervical lesions.Methods:The expressions of IgG subclasses in 32 cases of human papillomavirus(HPV) infection,30 cervical intraepithelial neoplasia(CIN I),43 CIN Ⅱ-Ⅲ,and 24 hysteromyoma and chronic cervicitis were examined by ELISA.Results:The absorbance values of HPV16VLPs-IgG,IgG1 increased with the grade of CIN(P < 0.05).The IgG2 dominance(IgG2/IgG1 ratio > 1) from control group was 100%,87.50% for HPV infection group,75% for CIN I group,compared with that from CIN Ⅱ-Ⅲ patients(9.52%)(P < 0.05).The positive rates and absorbance values of HPV16VLPs-IgG,IgG1 and IgG2 from HPV16-DNA positive group were significantly higher than those from non-HPV16-DNA positive group(P < 0.05).There was a moderate correlation between the HPV16-DNA testing and detection of HPV16VLPs-IgG(r = 0.531,P < 0.05).Conclusion:An increase of the expressions of HPV16VLPs-IgG and its subclasses in the serum of the patients with cervical precancerous lesions,especially those with CIN II-III,might be associated with duration of HPV infection and severity of cervical lesions.An increase of the IgG2 dominance(IgG2/IgG1 > 1) in serum from low grade cervical lesions group and normal control group,might indicate the clearance of HPV infection and the regression of cervical lesions.