目的 Pru p 3是桃主要致敏蛋白,目前尚未见桃Pru p 3 T细胞表位在我国桃过敏反应中的研究,本研究探讨桃主要致敏蛋白Pru p 3 T细胞表位。方法纳入蒿花粉相关桃过敏患者20例和健康对照者10人,采集受检者的外周血单个核细胞(PBMC),将PBMC...目的 Pru p 3是桃主要致敏蛋白,目前尚未见桃Pru p 3 T细胞表位在我国桃过敏反应中的研究,本研究探讨桃主要致敏蛋白Pru p 3 T细胞表位。方法纳入蒿花粉相关桃过敏患者20例和健康对照者10人,采集受检者的外周血单个核细胞(PBMC),将PBMC分别与8条Pru p 3来源的肽段共同孵育,比较桃过敏患者和健康对照者PBMC受各肽段刺激后的增生水平,分析不同肽段的变应原性。结果肽段Pru p 367-82对桃过敏患者PBMC的活化程度最高,20例桃过敏患者中对该肽段刺激指数(SI)阳性者14例,占70%; Pru p 323-38对桃过敏患者PBMC的活化率为55%(11/20)。Pru p 367-82与Art v 390-105氨基酸序列的一致率为81%。结论 Pru p 323-38和Pru p 367-82是引起我国桃过敏反应的主要T细胞表位,Pru p 367-82可能是参与蒿花粉-桃交叉反应的T细胞表位。展开更多
Background:Few investigations of genotype II of Toxoplasma gondii,the most preva-lent form of the Toxoplasma parasite in humans,have been carried out on due to the rapid conversion of tachyzoites to bradyzoites in its...Background:Few investigations of genotype II of Toxoplasma gondii,the most preva-lent form of the Toxoplasma parasite in humans,have been carried out on due to the rapid conversion of tachyzoites to bradyzoites in its life cycle.The current study aimed to create animal and in vitro models for production of the tachyzoites of the Prugniaud(PRU)genotype II strain.Methods:To develop an immunocompromised model and obtain tachyzoites of the PRU strain,BALB/c mice were orally treated with dexamethasone(10 mg/kg),cyclo-phosphamide(36 mg/kg),and cyclosporine(18 mg/kg)from 5 days prior to inocula-tion.Then,10-15 tissue cysts of PRU strain were inoculated intraperitoneally into the mice.The tachyzoites obtained from mice were then cultivated in a HeLa cell culture.The resulting yield of tachyzoites was cryopreserved in 92%fetal calf serum,8%dimethyl sulfoxide.The infectivity of these tachyzoites was evaluated using in vivo and in vitro examinations.Results:Numerous tachyzoites were observed in the peritoneal fluid of the immuno-suppressed mice within 10-15 days after inoculation,and many tachyzoites were har-vested from the HeLa cell culture.Trypan Blue staining showed 80%viability of the tachyzoites recovered from cryopreservation and this was confirmed by HeLa cell culture.In addition,mice infected intraperitoneally with the recovered tachyzoites presented with cysts in the brain after 2 months.Conclusion:We have developed an animal model for mass production of T.gondii tachyzoites of the PRU strain.This method can provide fresh viable tachyzoites of Toxoplasma gondii for use as and when required in future investigations.展开更多
文摘目的 Pru p 3是桃主要致敏蛋白,目前尚未见桃Pru p 3 T细胞表位在我国桃过敏反应中的研究,本研究探讨桃主要致敏蛋白Pru p 3 T细胞表位。方法纳入蒿花粉相关桃过敏患者20例和健康对照者10人,采集受检者的外周血单个核细胞(PBMC),将PBMC分别与8条Pru p 3来源的肽段共同孵育,比较桃过敏患者和健康对照者PBMC受各肽段刺激后的增生水平,分析不同肽段的变应原性。结果肽段Pru p 367-82对桃过敏患者PBMC的活化程度最高,20例桃过敏患者中对该肽段刺激指数(SI)阳性者14例,占70%; Pru p 323-38对桃过敏患者PBMC的活化率为55%(11/20)。Pru p 367-82与Art v 390-105氨基酸序列的一致率为81%。结论 Pru p 323-38和Pru p 367-82是引起我国桃过敏反应的主要T细胞表位,Pru p 367-82可能是参与蒿花粉-桃交叉反应的T细胞表位。
基金This research was funded by the project 97-01-01-18897 from Shiraz University of Medical Sciences,Shiraz,Iran.
文摘Background:Few investigations of genotype II of Toxoplasma gondii,the most preva-lent form of the Toxoplasma parasite in humans,have been carried out on due to the rapid conversion of tachyzoites to bradyzoites in its life cycle.The current study aimed to create animal and in vitro models for production of the tachyzoites of the Prugniaud(PRU)genotype II strain.Methods:To develop an immunocompromised model and obtain tachyzoites of the PRU strain,BALB/c mice were orally treated with dexamethasone(10 mg/kg),cyclo-phosphamide(36 mg/kg),and cyclosporine(18 mg/kg)from 5 days prior to inocula-tion.Then,10-15 tissue cysts of PRU strain were inoculated intraperitoneally into the mice.The tachyzoites obtained from mice were then cultivated in a HeLa cell culture.The resulting yield of tachyzoites was cryopreserved in 92%fetal calf serum,8%dimethyl sulfoxide.The infectivity of these tachyzoites was evaluated using in vivo and in vitro examinations.Results:Numerous tachyzoites were observed in the peritoneal fluid of the immuno-suppressed mice within 10-15 days after inoculation,and many tachyzoites were har-vested from the HeLa cell culture.Trypan Blue staining showed 80%viability of the tachyzoites recovered from cryopreservation and this was confirmed by HeLa cell culture.In addition,mice infected intraperitoneally with the recovered tachyzoites presented with cysts in the brain after 2 months.Conclusion:We have developed an animal model for mass production of T.gondii tachyzoites of the PRU strain.This method can provide fresh viable tachyzoites of Toxoplasma gondii for use as and when required in future investigations.
