In order to investigate the IFN-γ and IL-4 expression of CD8^＋T lymphoeytes in the peripheral blood from patients with recurrent genital herpes （RGH） at different clinical periods and their relationship with the p...In order to investigate the IFN-γ and IL-4 expression of CD8^＋T lymphoeytes in the peripheral blood from patients with recurrent genital herpes （RGH） at different clinical periods and their relationship with the pathogenesis of RGH, flow cytometry was used to detect the intracellular cytokines （IFN-γ and IL-4） of CD8^＋ T lymphocytes in the peripheral blood of 30 patients with RGH at acute period, 20 patients with RGH at recovery period and 15 healthy volunteers. The results showed that RGH patients at acute period had a lower percentage of Tcl subsets in peripheral blood than that of healthy controls （P〈0. 001）, especially a remarkable decreased percentage of Tc1 subsets （P〈0. 001） among those RGH patients with recurrent number more than 3 in the recent half a year. Tc1/Tc2 ratio in the RGH patients at acute period was significantly decreased as conapared with normal control group （P〈0.05）. The recurrent number of acute patients in the recent half a year was significantly correlated with the percentage of Tc1 subsets and the ratio of Tc1/Tc2 （P〈 0.05）. A decreased percentage of Tc1 subsets was found among the RGH patients with recurrent number more than 3 in the recent half a year at recovery period in comparison with healthy volunteers （P〈0.05）, and it was significantly correlated with the recurrent number in the recent half a year （P〈0.05）. It is concluded that there are Tc1/Tc2 imbalance and a low level of Tc1 subsets in RGH patients who are relapsing repeatedly in the near period. The low level of Tc1 subsets may be an important factor for the recurrence of RGH and the reactivation of latent herpesvirus infection.展开更多
Childhood leukemia bottleneck phenomenon is the most mysterious corollary of the prenatal origin discovery of leukemogenic chromosome translocations. The bottleneck is evidence that leukemia initiation, by in utero ac...Childhood leukemia bottleneck phenomenon is the most mysterious corollary of the prenatal origin discovery of leukemogenic chromosome translocations. The bottleneck is evidence that leukemia initiation, by in utero acquired chromosome translocations that generate functional fusion genes, is far more common than the incidence rate of corresponding leukemia. For childhood TEL-AML1 ^＋ acute lymphoblastic leukemia （ALL） this equates to approximately 100 times. Practically this means that among a hundred children born with TEL-AML1 fusion gene, only one child will later in its life develop ALL. The key data necessary for unraveling of this mystery were discovered in 2002. It was the level of TEL-AML1^＋cells＇ frequency. The bottleneck is caused by the very low body TEL-AML1^＋cell count. Only one out of a thousand B cells carries TEL-AML1 fusion gene. TEL-AML1^＋body cell count is low because TEL-AML1 fusion is generated at cell level of 103 to 104 just during the late fetal lymphopoiesis i.e. after the 36th gestational week.展开更多
文摘In order to investigate the IFN-γ and IL-4 expression of CD8^＋T lymphoeytes in the peripheral blood from patients with recurrent genital herpes （RGH） at different clinical periods and their relationship with the pathogenesis of RGH, flow cytometry was used to detect the intracellular cytokines （IFN-γ and IL-4） of CD8^＋ T lymphocytes in the peripheral blood of 30 patients with RGH at acute period, 20 patients with RGH at recovery period and 15 healthy volunteers. The results showed that RGH patients at acute period had a lower percentage of Tcl subsets in peripheral blood than that of healthy controls （P〈0. 001）, especially a remarkable decreased percentage of Tc1 subsets （P〈0. 001） among those RGH patients with recurrent number more than 3 in the recent half a year. Tc1/Tc2 ratio in the RGH patients at acute period was significantly decreased as conapared with normal control group （P〈0.05）. The recurrent number of acute patients in the recent half a year was significantly correlated with the percentage of Tc1 subsets and the ratio of Tc1/Tc2 （P〈 0.05）. A decreased percentage of Tc1 subsets was found among the RGH patients with recurrent number more than 3 in the recent half a year at recovery period in comparison with healthy volunteers （P〈0.05）, and it was significantly correlated with the recurrent number in the recent half a year （P〈0.05）. It is concluded that there are Tc1/Tc2 imbalance and a low level of Tc1 subsets in RGH patients who are relapsing repeatedly in the near period. The low level of Tc1 subsets may be an important factor for the recurrence of RGH and the reactivation of latent herpesvirus infection.
文摘Childhood leukemia bottleneck phenomenon is the most mysterious corollary of the prenatal origin discovery of leukemogenic chromosome translocations. The bottleneck is evidence that leukemia initiation, by in utero acquired chromosome translocations that generate functional fusion genes, is far more common than the incidence rate of corresponding leukemia. For childhood TEL-AML1 ^＋ acute lymphoblastic leukemia （ALL） this equates to approximately 100 times. Practically this means that among a hundred children born with TEL-AML1 fusion gene, only one child will later in its life develop ALL. The key data necessary for unraveling of this mystery were discovered in 2002. It was the level of TEL-AML1^＋cells＇ frequency. The bottleneck is caused by the very low body TEL-AML1^＋cell count. Only one out of a thousand B cells carries TEL-AML1 fusion gene. TEL-AML1^＋body cell count is low because TEL-AML1 fusion is generated at cell level of 103 to 104 just during the late fetal lymphopoiesis i.e. after the 36th gestational week.
