Background:Silicosis is an occupational lung disease that is caused by chronic expo-sure to silica dust.Silica-exposed workers are at higher risk of developing TB,resulting in lung fibrosis and significant respiratory...Background:Silicosis is an occupational lung disease that is caused by chronic expo-sure to silica dust.Silica-exposed workers are at higher risk of developing TB,resulting in lung fibrosis and significant respiratory dysfunction.Diosgenin is a steroidal sapo-nin that has been shown to exert a therapeutic effect on lung injury.Therefore,we investigated the potential efficacy of diosgenin in treating silicotuberculosis by evalu-ating its effectiveness against Mycobacterium smegmatis,as well as its antifibrotic and antioxidant effects in silica-induced TB in rats.Methods:Silicosis was induced by intratracheal instillation of 50 mg/kg crystalline sil-ica in Sprague-Dawley rats.Rats were grouped into 7(10 per group).Different doses of diosgenin(1,10,and 20 mg/kg)and saline were administered for 30 days.Afterwards,five rats from each group were sacrificed,and the five remaining rats in each group,except the control,received Mycobacterium smegmatis.Treatment continued until the 50th day,and the animals were sacrificed at the end of the experiment.The result was analyzed using a one-way analysis of variance(ANOVA)with GraphPad Prism.Results:At a half-maximal inhibition concentration of 0.006043μg/mL,diosgenin inhib-ited the growth of Mycobacterium smegmatis.Oxidative stress markers such as malon-dialdehyde were significantly reduced.The health-enhancing effects of catalase and superoxide dismutase were elevated.Additionally,histological findings demonstrated a significant improvement in respiratory function following diosgenin treatment.Conclusion:Diosgenin treatment inhibited the growth of Mycobacterium smegmatis,leading to a reduction in the susceptibility of rats to infection and improved pulmo-nary function through its antioxidant effect.展开更多
Introduction: Human leukocyte antigen G (HLA-G) is a non-classical major histocompatibility complex (MHC) class Ib antigen characterized by a limited polymorphism. The expression of HLA-G at immune privileged sites an...Introduction: Human leukocyte antigen G (HLA-G) is a non-classical major histocompatibility complex (MHC) class Ib antigen characterized by a limited polymorphism. The expression of HLA-G at immune privileged sites and its ability to inhibit the effectors functions of immune cells has set HLA-G as a molecule of immune tolerance. This expression pattern is unique among HLA genes and suggests that HLA-G may be involved in interactions that are critical in establishing and/or maintaining pregnancy. Methods: Soluble HLA-G (sHLA-G) levels were measured using a BioVendor sHLA-G ELISA kit following the manufacturer’s protocol. The study participants include women undergoing spontaneous abortion, non-pregnant women, males and an archive sample of women who had normal vaginal deliveries without any complications and any history of malaria infection from gestation to delivery. Results: Soluble HLA-G levels were higher among women undergoing spontaneous abortion as compared to women who had normal vaginal delivery and non-pregnant women. Soluble HLA-G levels were also higher in second trimester as compared to first trimester in both women who had spontaneous abortions and women who had normal delivery. Conclusion: Although sHLA-G levels were higher among women undergoing spontaneous abortion as compared to non-pregnant women and women who had normal delivery, this may be playing a role in the maintenance of maternal immune tolerance to fetal antigen, since plasma sHLA-G levels increased with increasing trimester in both women who had normal delivery and women undergoing spontaneous abortion.展开更多
文摘Background:Silicosis is an occupational lung disease that is caused by chronic expo-sure to silica dust.Silica-exposed workers are at higher risk of developing TB,resulting in lung fibrosis and significant respiratory dysfunction.Diosgenin is a steroidal sapo-nin that has been shown to exert a therapeutic effect on lung injury.Therefore,we investigated the potential efficacy of diosgenin in treating silicotuberculosis by evalu-ating its effectiveness against Mycobacterium smegmatis,as well as its antifibrotic and antioxidant effects in silica-induced TB in rats.Methods:Silicosis was induced by intratracheal instillation of 50 mg/kg crystalline sil-ica in Sprague-Dawley rats.Rats were grouped into 7(10 per group).Different doses of diosgenin(1,10,and 20 mg/kg)and saline were administered for 30 days.Afterwards,five rats from each group were sacrificed,and the five remaining rats in each group,except the control,received Mycobacterium smegmatis.Treatment continued until the 50th day,and the animals were sacrificed at the end of the experiment.The result was analyzed using a one-way analysis of variance(ANOVA)with GraphPad Prism.Results:At a half-maximal inhibition concentration of 0.006043μg/mL,diosgenin inhib-ited the growth of Mycobacterium smegmatis.Oxidative stress markers such as malon-dialdehyde were significantly reduced.The health-enhancing effects of catalase and superoxide dismutase were elevated.Additionally,histological findings demonstrated a significant improvement in respiratory function following diosgenin treatment.Conclusion:Diosgenin treatment inhibited the growth of Mycobacterium smegmatis,leading to a reduction in the susceptibility of rats to infection and improved pulmo-nary function through its antioxidant effect.
文摘Introduction: Human leukocyte antigen G (HLA-G) is a non-classical major histocompatibility complex (MHC) class Ib antigen characterized by a limited polymorphism. The expression of HLA-G at immune privileged sites and its ability to inhibit the effectors functions of immune cells has set HLA-G as a molecule of immune tolerance. This expression pattern is unique among HLA genes and suggests that HLA-G may be involved in interactions that are critical in establishing and/or maintaining pregnancy. Methods: Soluble HLA-G (sHLA-G) levels were measured using a BioVendor sHLA-G ELISA kit following the manufacturer’s protocol. The study participants include women undergoing spontaneous abortion, non-pregnant women, males and an archive sample of women who had normal vaginal deliveries without any complications and any history of malaria infection from gestation to delivery. Results: Soluble HLA-G levels were higher among women undergoing spontaneous abortion as compared to women who had normal vaginal delivery and non-pregnant women. Soluble HLA-G levels were also higher in second trimester as compared to first trimester in both women who had spontaneous abortions and women who had normal delivery. Conclusion: Although sHLA-G levels were higher among women undergoing spontaneous abortion as compared to non-pregnant women and women who had normal delivery, this may be playing a role in the maintenance of maternal immune tolerance to fetal antigen, since plasma sHLA-G levels increased with increasing trimester in both women who had normal delivery and women undergoing spontaneous abortion.
