人重组γ-干扰素对兔妊娠的影响

ao et al. (1999) reported that human recombinet interferon gamma (hrIFN γ) exerted a certain anti contraceptive effect on the pregnant rabbit. In order to investigate the possible mechanisms by which interferon gamma (IFN γ) exerts its deleterious effect on pregnancy, 12 New Zealand breed rabbits were used as an animal model. One day (Day 1) after the females were mated with male animals, They were randomly divided into 3 groups. There were control, hrIFN γ 50 000 IU and hrIFN γ 100 000 IU groups. Saline and hrIFN γ of different doses were administered respectively to control and experimental rabbits via vaginal muscular injection on Day 6 and were killed on Day 12 of pregnancy. The fetus and placenta were weighed. The blood was collected before injection and at various intervals(6, 12, 24, 48 and 96 h) after injection. The concentration of serum progesterone were measured by radioimmunoassay. The apoptosis in placenta were examined by DNA fragmentation analysis. The results were as folloows: 1) In control, 50 000 IU and 100 000 IU hrIFN γ groups, progesterone level in serum were 26 20±0 74 ng/ml,17 81±0 55 ng/ml and 10 97±0 84 ng/ml respectively at 96 h after injection. In contrast with control group, progesterone production dropped significantly in rabbits treated with hrIFN γ, especially 100 000 IU hrIFN γ. 2) Apoptotic fragmentation of DNA(180 bp units) in placenta were detected both in control and experimental groups. The scan density of degraded DNA fragmentation in experimental group was higher than that in control, which suggested that apoptosis in placenta was further induced by hrIFN γ, especially by high dose hrIFN γ. In addition, the weight of placenta in rabbits treated with hrIFN γ reduced significantly as compared with that in control group( P <0 01). We suggest that hrIFN γ inhibits the secretion of progesterone, as a result of inducing apoptosis in placenta.

重组γ-干扰素作用人Tenons囊成纤维细胞体外研究

目的 体外研究人重组γ－干扰素对人Ｔｅｎｏｎｓ囊成纤维细胞作用。方法 以人Ｔｅｎｏｎｓ囊成纤维细胞作为实验对象，分别加入０．１～１０＾６ Ｕ／ｍｌ人重组γ－干扰素（ＩＦＮ－γ）、０．００１～１０ｍｇ／Ｌ丝裂霉素（ＭＭＣ）、０．１～１０３ｍｇ／Ｌ５－氟尿嘧啶（５－Ｆｕ）孵育４８ｈ，然后以ＭＴＴ法进行检测。结果 高浓度和低浓度ＩＦＮ－γ实验组ＯＤ值较对照组升高（Ｐ〈０．０５）。

CO_2激光联合白介素-2或γ-干扰素治疗复发性尖锐湿疣

目的探讨女性复发性尖锐湿疣(CA)难治原因及临床治愈的有效方法。方法对复发性63例女性CA用CO2激光烧灼祛除疣体后辅以人重组γ-干扰素(INF-γ)、白介素-2(IL-2)治疗,同时对合并的淋菌、解脲脲支原体(Uu)、沙眼衣原体(Ct)、白色念珠菌、滴虫、阴道加德纳菌进行化验检查及治疗。结果63例患者的CA病变及合并症同时治愈,但IL-2组一次激光治愈率显著高于INF-γ组(P<0.05)。结论对复发性CA患者首先用CO2激光烧灼祛除疣体,辅以IL-2或INF-γ治疗以调节机体免疫功能、增强抗病毒能力,同时重视合并症的治疗是快速治愈CA、防止其复发的行之有效的方法。

hrIFN-γ和hrIL-4对人早孕滋养层细胞形态改变的研究

目的 研究人重组γ 干扰素 (hrIFN γ)和白细胞介素 4(hrIL 4)对人早孕滋养层细胞形态的作用。方法 采用人工流产方法取得绒毛膜组织 ,加入hrIFN γ和hrIL 42 4h短期组织培养 ,通过光镜和透射电镜观察滋养层细胞形态学变化。结果 hrIFN γ组滋养层细胞核由圆形变为扁圆形 ,细胞界限不清 ,滋养层细胞数目明显减少 ;hrIL 4组滋养层细胞核多呈圆形或椭圆形 ,滋养层细胞数目明显增多至数层。结论 外源性Th1。

HrIFN-γ和hrIL-4对体外培养人早孕滋养层细胞PCNA和bcl-2表达的影响

【目的】研究人重组γ-干扰素(hrIFN-γ)和白细胞介素4(hrIL-4)对人早孕滋养层细胞PCNA和bcl-2表达的影响。【方法】采用人工流产方法提取绒毛膜组织,在体外培养条件下加入hrIFN-γ和hrIL-4,继续培养24 h,用倒置光显微镜和透射电镜观察绒毛膜组织形态学变化,应用免疫组织化学法检测绒毛膜组织滋养层细胞PCNA和bcl-2蛋白表达。【结果】hrIFN-γ处理的滋养层细胞PCNA和bcl-2表达均较对照组弱;hrIL-4处理的滋养层细胞PCNA和bcl-2表达较对照组增强。【结论】hrIFN-γ抑制滋养层细胞的增殖,hrIL-4促进滋养层细胞的增殖。