Bifidobacterium longum subsp.infantis is a commensal bacterium that predominates in the infant gut,playing a critical role in both preventing foreign infections and facilitating immune development.This study aimed to ...Bifidobacterium longum subsp.infantis is a commensal bacterium that predominates in the infant gut,playing a critical role in both preventing foreign infections and facilitating immune development.This study aimed to explore the effects of B.longum subsp.infantis supplementation on interferon-beta(IFN-β)secretion and intestinal barrier improvement in growing mice.Female and male mice were orally administered either saline or B.longum subsp.infantis CCFM1269 or I5TI(1×10^(9) CFU/mice per day,n=8)from 1-week-age until 3-,4-,and 5-week-age.RNA sequencing analysis revealed that CCFM1269 exhibited potential antiviral capacity through increasing 2'-5'oligoadenylate synthetase(OAS).Additionally,CCFM1269 supplementation significantly increased colonic IFN-β levels which combined with OAS in 3-week-old female and male mice by activating the TLR4-TRIF-dependent signaling pathway.However,this effect was not observed in 4-and 5-week-old mice.Furthermore,both CCFM1269 were found to modulate the gut microbiota composition and enhance the intestinal barrier function in 3-,4-,and 5-week-old mice.In summary,the results of this study suggested that B.longum subsp.infantis CCFM1269 promoting intestinal barrier and releasing IFN-β in growing mice was in a strain-specific and time-dependent manner.展开更多
Water extract of Cortex toosendan (1∶1) was given by oral admistration to the pregnant mice on day 7 in order to study its toxicity. Embryo livability was examined. The natural killer cells in the uterine decidua wer...Water extract of Cortex toosendan (1∶1) was given by oral admistration to the pregnant mice on day 7 in order to study its toxicity. Embryo livability was examined. The natural killer cells in the uterine decidua were detected by immunohistochemistry. The Th1 cytokines IFN-γ and TNF-α in the uterine lysates were analyzed by ELISA. The results showed that Cortex toosendan is toxic to embryo, and that the toxicity is related to the enhancement of Th1 responses at the maternal-fetal interface, with the increase of NK cell counts, IFN-γ and TNF-α concentrations in pregnant uterus.展开更多
基金funded by the National Key R&D Program of China(2021YFD2100700)National Natural Science Foundation of China(32021005)+1 种基金111 project(BP0719028)Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province。
文摘Bifidobacterium longum subsp.infantis is a commensal bacterium that predominates in the infant gut,playing a critical role in both preventing foreign infections and facilitating immune development.This study aimed to explore the effects of B.longum subsp.infantis supplementation on interferon-beta(IFN-β)secretion and intestinal barrier improvement in growing mice.Female and male mice were orally administered either saline or B.longum subsp.infantis CCFM1269 or I5TI(1×10^(9) CFU/mice per day,n=8)from 1-week-age until 3-,4-,and 5-week-age.RNA sequencing analysis revealed that CCFM1269 exhibited potential antiviral capacity through increasing 2'-5'oligoadenylate synthetase(OAS).Additionally,CCFM1269 supplementation significantly increased colonic IFN-β levels which combined with OAS in 3-week-old female and male mice by activating the TLR4-TRIF-dependent signaling pathway.However,this effect was not observed in 4-and 5-week-old mice.Furthermore,both CCFM1269 were found to modulate the gut microbiota composition and enhance the intestinal barrier function in 3-,4-,and 5-week-old mice.In summary,the results of this study suggested that B.longum subsp.infantis CCFM1269 promoting intestinal barrier and releasing IFN-β in growing mice was in a strain-specific and time-dependent manner.
文摘Water extract of Cortex toosendan (1∶1) was given by oral admistration to the pregnant mice on day 7 in order to study its toxicity. Embryo livability was examined. The natural killer cells in the uterine decidua were detected by immunohistochemistry. The Th1 cytokines IFN-γ and TNF-α in the uterine lysates were analyzed by ELISA. The results showed that Cortex toosendan is toxic to embryo, and that the toxicity is related to the enhancement of Th1 responses at the maternal-fetal interface, with the increase of NK cell counts, IFN-γ and TNF-α concentrations in pregnant uterus.
