The researches on chlamydia in recent years show that chlamydia bacteriophage may be a potential and effective means to solve the clinical infection of chlamydia trachomatis(Ct). We investigated the biological effec...The researches on chlamydia in recent years show that chlamydia bacteriophage may be a potential and effective means to solve the clinical infection of chlamydia trachomatis(Ct). We investigated the biological effect of chlamydiaphage phi CPG1 capsid protein Vp1 on Ct both in Mc Coy cells and genital tract of mice. Different concentrations of Vp1 were co-incubated with Ct E serotype strain in Mc Coy cells. Female BALB/c mice were used to establish Ct E strain-induced urogenital infection model. They were randomly divided into five groups and given different treatments on the fifth day after Ct inoculation. Animals in groups 1 and 2 were given 30 μL different concentrations of Vp1 in the genital tract respectively, those in group 3 were intramuscularly injected with 30 μL Vp1, those in the infected group did not receive any intervention, and those in the control group received 30 μL PBS in the genital tract. The vaginal discharge was collected to identify the live chlamydia by cell culture and gene fragment by real time PCR different days after infection. Inhibition rate of 100 μg/m L and 50 μg/m L Vp1 proteins against Ct E strain in the Mc Coy cell cultures was 91% and 79% respectively. The number of intracellular Ct inclusion in the Mc Coy cells co-cultured with vaginal discharge of group 1 and group 2 was less than in the infected group, and that in group 1 was less than in group 2, on the 7th day after Ct inoculation. Real-time PCR showed that chlamydia concentration of the vaginal discharge in group 2 was lower than in the infected group, and that in group 1 was lower than in group 2 on the 10 th day. It was suggested that Vp1 capsid proteins had inhibitory effect on the proliferation of Ct serovar E strain in cell culture and mouse genital tract.展开更多
To review the studies on the etiology of trachoma and to honor Professor Tang Feifan (Prof FF Tang) He is the first scientist who was successful in isolating and cultivating chlamydia trachomatis in 1946 Data sou...To review the studies on the etiology of trachoma and to honor Professor Tang Feifan (Prof FF Tang) He is the first scientist who was successful in isolating and cultivating chlamydia trachomatis in 1946 Data sources The principal literatures are cited from Tang's papers published from the 1930s to the 1950s Earlier literatures concerning early hypotheses for trachoma pathogenic agent are also studied Study selection and data extraction Only important and conclusive breakthroughs in Tang's papers are selected and extracted Results and conclusions In the 1930s Tang was intending to repeat Noguchi's experiments in isolating bacterium granulosis from cases of trachoma in China and to employ bacterium granulosis isolated by Noguchi in 1928 for reproducing experimental trachomatous human clinical manifestations in China Both experiments showed negative results In the 1950s, before isolated chlamydia trachomtas, Tang and his colleagues had finished two fundamental studies: (1) the histological nature of trachoma, their relationship to etiological agent as well as to the host cells; and (2) the clinical manifestations and the morphological pictures of trachoma in monkeys Eventually chlamydia trachomatis was isolated successfully and cultivated continuously展开更多
As a contagious bacterial infection that affects the conjunctival covering of the eye, the cornea and the eyelids, trachoma is controlled by an endorsed integrated strategy consisting of surgery for trichiasis, antibi...As a contagious bacterial infection that affects the conjunctival covering of the eye, the cornea and the eyelids, trachoma is controlled by an endorsed integrated strategy consisting of surgery for trichiasis, antibiotic therapy, facial cleanliness and environmental improvement, namely, the SAFE strategy developed by World Health Organization. Developed based on evidence from previous field trials and constantly modified in practice, SAFE strategy has greatly boosted the progress in trachoma control. Regardless of the fact that there are still many pending questions, national program coordinators are convinced that trachoma control initiative based on SAFE strategy would be effective.展开更多
基金supported by National Natural Science Foundation of China(No.31370211)
文摘The researches on chlamydia in recent years show that chlamydia bacteriophage may be a potential and effective means to solve the clinical infection of chlamydia trachomatis(Ct). We investigated the biological effect of chlamydiaphage phi CPG1 capsid protein Vp1 on Ct both in Mc Coy cells and genital tract of mice. Different concentrations of Vp1 were co-incubated with Ct E serotype strain in Mc Coy cells. Female BALB/c mice were used to establish Ct E strain-induced urogenital infection model. They were randomly divided into five groups and given different treatments on the fifth day after Ct inoculation. Animals in groups 1 and 2 were given 30 μL different concentrations of Vp1 in the genital tract respectively, those in group 3 were intramuscularly injected with 30 μL Vp1, those in the infected group did not receive any intervention, and those in the control group received 30 μL PBS in the genital tract. The vaginal discharge was collected to identify the live chlamydia by cell culture and gene fragment by real time PCR different days after infection. Inhibition rate of 100 μg/m L and 50 μg/m L Vp1 proteins against Ct E strain in the Mc Coy cell cultures was 91% and 79% respectively. The number of intracellular Ct inclusion in the Mc Coy cells co-cultured with vaginal discharge of group 1 and group 2 was less than in the infected group, and that in group 1 was less than in group 2, on the 7th day after Ct inoculation. Real-time PCR showed that chlamydia concentration of the vaginal discharge in group 2 was lower than in the infected group, and that in group 1 was lower than in group 2 on the 10 th day. It was suggested that Vp1 capsid proteins had inhibitory effect on the proliferation of Ct serovar E strain in cell culture and mouse genital tract.
文摘To review the studies on the etiology of trachoma and to honor Professor Tang Feifan (Prof FF Tang) He is the first scientist who was successful in isolating and cultivating chlamydia trachomatis in 1946 Data sources The principal literatures are cited from Tang's papers published from the 1930s to the 1950s Earlier literatures concerning early hypotheses for trachoma pathogenic agent are also studied Study selection and data extraction Only important and conclusive breakthroughs in Tang's papers are selected and extracted Results and conclusions In the 1930s Tang was intending to repeat Noguchi's experiments in isolating bacterium granulosis from cases of trachoma in China and to employ bacterium granulosis isolated by Noguchi in 1928 for reproducing experimental trachomatous human clinical manifestations in China Both experiments showed negative results In the 1950s, before isolated chlamydia trachomtas, Tang and his colleagues had finished two fundamental studies: (1) the histological nature of trachoma, their relationship to etiological agent as well as to the host cells; and (2) the clinical manifestations and the morphological pictures of trachoma in monkeys Eventually chlamydia trachomatis was isolated successfully and cultivated continuously
文摘As a contagious bacterial infection that affects the conjunctival covering of the eye, the cornea and the eyelids, trachoma is controlled by an endorsed integrated strategy consisting of surgery for trichiasis, antibiotic therapy, facial cleanliness and environmental improvement, namely, the SAFE strategy developed by World Health Organization. Developed based on evidence from previous field trials and constantly modified in practice, SAFE strategy has greatly boosted the progress in trachoma control. Regardless of the fact that there are still many pending questions, national program coordinators are convinced that trachoma control initiative based on SAFE strategy would be effective.