Human papillomavirus(HPV) genital infection is a very common sexual transmitted disease.Mostly,the infection is transient and asymptomatic.The induction of effective immune responses usually allows the infection to be...Human papillomavirus(HPV) genital infection is a very common sexual transmitted disease.Mostly,the infection is transient and asymptomatic.The induction of effective immune responses usually allows the infection to be spontaneously cured.However,the infection sometimes can be responsible for an intraepithelial lesion,which may progress to be cervical cancer.Cervical cancer is one of the most common neoplastic diseases affecting women.It is clear that carcinogenic HPV infection is the necessary process for the development of cervical cancer.HPV infection is very frequent in young women aged less than 25 years and viral clearance lasts for 8 months in average.This clearance is the consequence of host immunity intervention,which leads to spontaneous regression of infection and the overwhelming majority of low-grade squamous intraepithelial lesions(more than 80% within a period of 2 years).The major factor,which permits the progression to high grade squamous intraepithelial lesions and invasive cervical cancer,is the persistent feature of HPV infection.HPV infection is usually transient,but several factors were identified as host factors(genetic,immunodepression,oral contraception and smoking) and viral factors(genotype,variants,viral load and integration) to increase the persistence.Cervical cancer is clearly the first virus-induced solid tumor discovered in human.Furthermore,it represents a woman death cause that can be avoided.展开更多
目的研究肺积方对吲哚胺-2,3-双加氧酶(indoleamine 2,3-dioxygenase,IDO)诱导Lewis肺癌(Lewis lung carcinoma,LL/2)小鼠模型免疫逃逸的影响。方法采用C57BL/6小鼠建立LL/2-增强型绿色荧光蛋白(enhanced green fluorescent protein,EGF...目的研究肺积方对吲哚胺-2,3-双加氧酶(indoleamine 2,3-dioxygenase,IDO)诱导Lewis肺癌(Lewis lung carcinoma,LL/2)小鼠模型免疫逃逸的影响。方法采用C57BL/6小鼠建立LL/2-增强型绿色荧光蛋白(enhanced green fluorescent protein,EGFP)-IDO模型48只,将小鼠按随机数字表分为模型组(灌胃生理盐水)、中药组[灌胃肺积方水煎液100mg/(g·d)]、1-甲基-D-色氨酸(1-methyl-D-tryptophan,1-MT)治疗组[灌胃1-MT混合液100mg/(kg·d)]和紫杉醇组[腹腔注射紫杉醇15mg/(kg·d)],每组12只。造模后第2日开始干预,其中24只观察小鼠生存期,余24只在造模并干预28日后采用流式细胞术检测脾脏CD4^+CD25^+FoxP3^+调节性T细胞(regulatory T cells,Treg)比例。结果与模型组比较,中药组、1-MT组生存期延长(P<0.01),中药组、1-MT组、紫杉醇组Treg比例降低(P<0.01)。与紫杉醇组比较,中药组、1-MT组生存期延长(P<0.01),1-MT组Treg比例降低(P<0.05)。结论肺积方能抑制肺癌细胞的增殖,抑制免疫逃逸,改善免疫功能,延长荷瘤小鼠生存期。展开更多
Interleukin-18 （IL-18） was discovered as an interferon-y-inducing factor and had a critical role in inflammatory and immune respouse. It stimulates natural killer （NK） and T cells and enhances Thl immune response....Interleukin-18 （IL-18） was discovered as an interferon-y-inducing factor and had a critical role in inflammatory and immune respouse. It stimulates natural killer （NK） and T cells and enhances Thl immune response. These activated immune cells eliminate cancer cells and virus-infected cells effectively. However, IL-18 has also been found to promote tumor progression. Higher expression or secretion level of IL-18 is detected in various cancer cells in comparison with normal control, and IL-18 is able to induce angiogenesis, migration/metastasis, proliferation and immune escape. These dual effects and the mechanism of IL-18 need to be investigated further as it relates to cancer.展开更多
文摘Human papillomavirus(HPV) genital infection is a very common sexual transmitted disease.Mostly,the infection is transient and asymptomatic.The induction of effective immune responses usually allows the infection to be spontaneously cured.However,the infection sometimes can be responsible for an intraepithelial lesion,which may progress to be cervical cancer.Cervical cancer is one of the most common neoplastic diseases affecting women.It is clear that carcinogenic HPV infection is the necessary process for the development of cervical cancer.HPV infection is very frequent in young women aged less than 25 years and viral clearance lasts for 8 months in average.This clearance is the consequence of host immunity intervention,which leads to spontaneous regression of infection and the overwhelming majority of low-grade squamous intraepithelial lesions(more than 80% within a period of 2 years).The major factor,which permits the progression to high grade squamous intraepithelial lesions and invasive cervical cancer,is the persistent feature of HPV infection.HPV infection is usually transient,but several factors were identified as host factors(genetic,immunodepression,oral contraception and smoking) and viral factors(genotype,variants,viral load and integration) to increase the persistence.Cervical cancer is clearly the first virus-induced solid tumor discovered in human.Furthermore,it represents a woman death cause that can be avoided.
文摘目的研究肺积方对吲哚胺-2,3-双加氧酶(indoleamine 2,3-dioxygenase,IDO)诱导Lewis肺癌(Lewis lung carcinoma,LL/2)小鼠模型免疫逃逸的影响。方法采用C57BL/6小鼠建立LL/2-增强型绿色荧光蛋白(enhanced green fluorescent protein,EGFP)-IDO模型48只,将小鼠按随机数字表分为模型组(灌胃生理盐水)、中药组[灌胃肺积方水煎液100mg/(g·d)]、1-甲基-D-色氨酸(1-methyl-D-tryptophan,1-MT)治疗组[灌胃1-MT混合液100mg/(kg·d)]和紫杉醇组[腹腔注射紫杉醇15mg/(kg·d)],每组12只。造模后第2日开始干预,其中24只观察小鼠生存期,余24只在造模并干预28日后采用流式细胞术检测脾脏CD4^+CD25^+FoxP3^+调节性T细胞(regulatory T cells,Treg)比例。结果与模型组比较,中药组、1-MT组生存期延长(P<0.01),中药组、1-MT组、紫杉醇组Treg比例降低(P<0.01)。与紫杉醇组比较,中药组、1-MT组生存期延长(P<0.01),1-MT组Treg比例降低(P<0.05)。结论肺积方能抑制肺癌细胞的增殖,抑制免疫逃逸,改善免疫功能,延长荷瘤小鼠生存期。
文摘Interleukin-18 （IL-18） was discovered as an interferon-y-inducing factor and had a critical role in inflammatory and immune respouse. It stimulates natural killer （NK） and T cells and enhances Thl immune response. These activated immune cells eliminate cancer cells and virus-infected cells effectively. However, IL-18 has also been found to promote tumor progression. Higher expression or secretion level of IL-18 is detected in various cancer cells in comparison with normal control, and IL-18 is able to induce angiogenesis, migration/metastasis, proliferation and immune escape. These dual effects and the mechanism of IL-18 need to be investigated further as it relates to cancer.
