Objective:To determine the inhibition mechanisms of secretome protein extracted from Paenibacillus polymyxa Kp10(Kp10)and Lactococcus lactis Gh1(Gh1)against methicillin-resistant Staphylococcus aureus(MRSA)and vancomy...Objective:To determine the inhibition mechanisms of secretome protein extracted from Paenibacillus polymyxa Kp10(Kp10)and Lactococcus lactis Gh1(Gh1)against methicillin-resistant Staphylococcus aureus(MRSA)and vancomycin-resistant Enterococcus(VRE).Methods:The sensitivity and viability of MRSA and VRE treated with secretome proteins of Kp10 and Gh1 were determined using minimal inhibitory concentration,minimum bactericidal concentration,and time-to-kill assays.The morphological changes were observed using scanning electron microscopy and transmission electron microscopy.To elucidate the antimicrobial mechanism of secretome protein of Kp10 and Gh1 against MRSA and VRE,2D gel proteomic analysis using liquid chromatography-mass spectrometry was run by comparing upregulated and downregulated proteins,and the proton motive force study including the efflux of ATP,pH gradient,and the membrane potential study were conducted.Results:MRSA and VRE were sensitive to Kp10 and Gh1 secretome protein extracts and displayed apparent morphological and internal composition changes.Several proteins associated with cellular component functions were either downregulated or upregulated in treated MRSA and VRE by changing the membrane potential gradient.Conclusions:Kp10 and Gh1 secretome proteins reduce the growth of VRE and MRSA by damaging the cell membrane.Cell division,cell wall biosynthesis,and protein synthesis are involved in the inhibition mechanism.展开更多
This study endeavors to investigate the effects of Bifidobacterium breve CCFM1078 on bone formation and resorption balance in growing BALB/c mice.Newborn BALB/c mice were assigned to the control group(administration s...This study endeavors to investigate the effects of Bifidobacterium breve CCFM1078 on bone formation and resorption balance in growing BALB/c mice.Newborn BALB/c mice were assigned to the control group(administration saline)and the CCFM1078 group(administration B.breve CCFM1078,3×10^(9) CFU/day)in 3-,4-,and 5-week tests.All the groups have male and female distinctions.Our findings demonstrate that B.breve CCFM1078 exerts on the dynamic equilibrium between bone formation and resorption during the critical period of growth in mice by modulating the composition of gut microbiota and metabolites(hexadecanamide,linoleoyl ethanolamide,and palmitoyl ethanolamide),the genes and proteins expression related to the growth hormone(GH)/insulin-like growth factors-1(IGF-1)axis and Gs/PKA/CREB signaling pathways,as well as downstream osteogenic and osteoclastic differentiation factors.The effects of B.breve CCFM1078 were different with age and gender dependent.This finding suggests B.breve CCFM1078 may have potential applications in regulating bone metabolism in the growth period population.展开更多
目的评估GH/IGF-1轴与幼龄脑瘫儿童粗大运动功能与认知发育的关系。方法纳入2012年1月至2014年12月新桥医院儿科住院的1-4岁脑瘫儿童71例作为脑瘫组,按体格发育落后与否划分为脑瘫伴发育迟滞组（cerebral palsy with retardation,CP-R...目的评估GH/IGF-1轴与幼龄脑瘫儿童粗大运动功能与认知发育的关系。方法纳入2012年1月至2014年12月新桥医院儿科住院的1-4岁脑瘫儿童71例作为脑瘫组,按体格发育落后与否划分为脑瘫伴发育迟滞组（cerebral palsy with retardation,CP-R）50例及脑瘫发育正常组（cerebral palsy with normal growth,CP-N）21例;按粗大运动功能分类系统（gross motor function classification system,GMFCS）划分为Ⅰ-Ⅱ级组20例（CP-GMFCSⅠ-Ⅱ）,Ⅲ-Ⅴ级组51例（CP-GMFCSⅢ-Ⅴ）;按Bayley评分划分智力发育指数（mental development index,MDI）≥70组15例（CP-MDI≥70）,MDI〈70组56例（CP-MDI〈70）。健康对照组为同期体检的健康儿童15例。观察上述儿童的血浆GH基础值及激发值、胰岛素样生长因子-1（insulin-like growth factorⅠ,IGF-1）、类胰岛素生长因子结合蛋白3（insulin-like growth factor-binding protein 3,IGFBP-3）水平作对照研究。结果 1CP-R组较CP-N组GH峰值显著降低,上述2组均较健康对照组GH峰值和IGF-1值显著降低（P〈0.05）。2CP-GMFCSⅠ-Ⅱ组和CP-GMFCSⅢ-Ⅴ组较健康对照组GH峰值和IGF-1值显著降低,CP-GMFCSⅢ-Ⅴ组较CPGMFCSⅠ-Ⅱ组GH峰值和IGF-1值显著降低（P〈0.05）。3CP-MDI〈70组和CP-MDI≥70组较健康对照组GH峰值显著降低（P〈0.05）;CP-MDI〈70组较CP-MDI≥70组和健康对照组IGF-1值显著降低（P〈0.05）。结论脑瘫伴体格发育迟缓、重度粗大运动功能障碍及明显MDI指数落后的儿童存在GH/IGF-1轴受损,提示GH、IGF-1低下可能是脑瘫儿童运动伴认知水平低下的原因之一。展开更多
基金supported by the funds of Ministry of Higher Education,Malaysia and Universiti Putra Malaysia through Fundamental Research Grant Scheme (FRGS/1/2017/SKK11/UPM/01/1) and Putra Grant (GP/2017/9571800)
文摘Objective:To determine the inhibition mechanisms of secretome protein extracted from Paenibacillus polymyxa Kp10(Kp10)and Lactococcus lactis Gh1(Gh1)against methicillin-resistant Staphylococcus aureus(MRSA)and vancomycin-resistant Enterococcus(VRE).Methods:The sensitivity and viability of MRSA and VRE treated with secretome proteins of Kp10 and Gh1 were determined using minimal inhibitory concentration,minimum bactericidal concentration,and time-to-kill assays.The morphological changes were observed using scanning electron microscopy and transmission electron microscopy.To elucidate the antimicrobial mechanism of secretome protein of Kp10 and Gh1 against MRSA and VRE,2D gel proteomic analysis using liquid chromatography-mass spectrometry was run by comparing upregulated and downregulated proteins,and the proton motive force study including the efflux of ATP,pH gradient,and the membrane potential study were conducted.Results:MRSA and VRE were sensitive to Kp10 and Gh1 secretome protein extracts and displayed apparent morphological and internal composition changes.Several proteins associated with cellular component functions were either downregulated or upregulated in treated MRSA and VRE by changing the membrane potential gradient.Conclusions:Kp10 and Gh1 secretome proteins reduce the growth of VRE and MRSA by damaging the cell membrane.Cell division,cell wall biosynthesis,and protein synthesis are involved in the inhibition mechanism.
基金supported 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This study endeavors to investigate the effects of Bifidobacterium breve CCFM1078 on bone formation and resorption balance in growing BALB/c mice.Newborn BALB/c mice were assigned to the control group(administration saline)and the CCFM1078 group(administration B.breve CCFM1078,3×10^(9) CFU/day)in 3-,4-,and 5-week tests.All the groups have male and female distinctions.Our findings demonstrate that B.breve CCFM1078 exerts on the dynamic equilibrium between bone formation and resorption during the critical period of growth in mice by modulating the composition of gut microbiota and metabolites(hexadecanamide,linoleoyl ethanolamide,and palmitoyl ethanolamide),the genes and proteins expression related to the growth hormone(GH)/insulin-like growth factors-1(IGF-1)axis and Gs/PKA/CREB signaling pathways,as well as downstream osteogenic and osteoclastic differentiation factors.The effects of B.breve CCFM1078 were different with age and gender dependent.This finding suggests B.breve CCFM1078 may have potential applications in regulating bone metabolism in the growth period population.
文摘目的评估GH/IGF-1轴与幼龄脑瘫儿童粗大运动功能与认知发育的关系。方法纳入2012年1月至2014年12月新桥医院儿科住院的1-4岁脑瘫儿童71例作为脑瘫组,按体格发育落后与否划分为脑瘫伴发育迟滞组（cerebral palsy with retardation,CP-R）50例及脑瘫发育正常组（cerebral palsy with normal growth,CP-N）21例;按粗大运动功能分类系统（gross motor function classification system,GMFCS）划分为Ⅰ-Ⅱ级组20例（CP-GMFCSⅠ-Ⅱ）,Ⅲ-Ⅴ级组51例（CP-GMFCSⅢ-Ⅴ）;按Bayley评分划分智力发育指数（mental development index,MDI）≥70组15例（CP-MDI≥70）,MDI〈70组56例（CP-MDI〈70）。健康对照组为同期体检的健康儿童15例。观察上述儿童的血浆GH基础值及激发值、胰岛素样生长因子-1（insulin-like growth factorⅠ,IGF-1）、类胰岛素生长因子结合蛋白3（insulin-like growth factor-binding protein 3,IGFBP-3）水平作对照研究。结果 1CP-R组较CP-N组GH峰值显著降低,上述2组均较健康对照组GH峰值和IGF-1值显著降低（P〈0.05）。2CP-GMFCSⅠ-Ⅱ组和CP-GMFCSⅢ-Ⅴ组较健康对照组GH峰值和IGF-1值显著降低,CP-GMFCSⅢ-Ⅴ组较CPGMFCSⅠ-Ⅱ组GH峰值和IGF-1值显著降低（P〈0.05）。3CP-MDI〈70组和CP-MDI≥70组较健康对照组GH峰值显著降低（P〈0.05）;CP-MDI〈70组较CP-MDI≥70组和健康对照组IGF-1值显著降低（P〈0.05）。结论脑瘫伴体格发育迟缓、重度粗大运动功能障碍及明显MDI指数落后的儿童存在GH/IGF-1轴受损,提示GH、IGF-1低下可能是脑瘫儿童运动伴认知水平低下的原因之一。
