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The Effect of Retinoic Acid on Neutrophil Innate Immune Interactions With Cutaneous Bacterial Pathogens

Infectious Microbes & Diseases 2024年第2期6卷 65-73页

作者： Alexandra Stream ross Corriden Simon Döhrmann Richard L.Gallo Victor Nizet Ericka L.Anderson Division of Host-Microbe Systems and Therapeutics Department of PediatricsUniversity of California San Diego School of MedicineLa JollaCaliforniaUSA Department of Dermatology University of California San Diego School of MedicineLa JollaCaliforniaUSA Skaggs School of Pharmacy and Pharmaceutical Sciences University of California San DiegoLa JollaCaliforniaUSA

Vitamin A and its biologically active derivative,retinoic acid(RA),are important for many immune ***,in particular,is essential for the development of immune cells,including neutrophils,which serve as a front-line defense against *** vitamin A deficiency has been linked to higher susceptibility to infections,the precise role of vitamin A/RA in host-pathogen interactions remains poorly ***,we provided evidence that RA boosts neutrophil killing of methicillin-resistant Staphylococcus aureus(MRSA).RA treatment stimulated primary human neutrophils to produce reactive oxygen species,neutrophil extracellular traps and the antimicrobial peptide cathelicidin(LL-37).Because RA treatment was insufficient to reduce MRSA burden in an in vivo murine model of skin infection,we expanded our analysis to other infectious *** did not affect the growth of a number of common bacterial pathogens,including MRSA,Escherichia coli K1 and Pseudomonas aeruginosa;however,RA directly inhibited the growth of group A Streptococcus(GAS).This antimicrobial effect,likely in combination with RA-mediated neutrophil boosting,resulted in substantial GAS killing in neutrophil killing assays conducted in the presence of ***,in a murine model of GAS skin infection,topical RA treatment showed therapeutic potential by reducing both skin lesion size and bacterial *** findings suggest that RA may hold promise as a therapeutic agent against GAS and perhaps other clinically significant human pathogens.

关键词： retinoic acid neutrophil bacterial infection Staphylococcus aureus group A Streptococcus neutrophil extracellular traps antimicrobial peptide cathelicidin

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Public health importance of light intensity physical activity

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Journal of Sport and Health Science 2024年第5期13卷 674-675页

作者： Robert ross Ian Janssen Mark S.Tremblay School of Kinesiology and Health Studies Queen’s UniversityKingstonON K7L 3N6Canada School of Medicine Division of Endocrinology and MetabolismQueen’s UniversityKingstonON K7L 3N6Canada Healthy Active Living and Obesity Research Group Children’s Hospital of Eastern Ontario Research InstituteOttawaON K1H 8L1Canada Department of Pediatrics University of OttawaOttawaON K1H 8L1Canada

*** intensity physical activity(PA)benefits health PA guidelines worldwide recommend that adults accumulate 150 min of moderate intensity or 75 min of vigorous intensity PA(moderate-to-vigorous PA(MVPA))weekly to achieve health benefits.1-3 Absent from these guidelines are recommendations for light intensity PA(LPA,e.g.,walking at a leisurely pace of 3 km/h or less,equivalent to 1.5-2.9 metabolic equivalents).

关键词： intensity light benefits

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Spatial analysis of the osteoarthritis microenvironment: techniques, insights, and applications

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Bone Research 2024年第1期12卷 1-19页

作者： Xiwei Fan Antonia Rujia Sun Reuben S.E.Young Isaac O.Afara Brett R.Hamilton Louis Jun Ye Ong ross Crawford Indira Prasadam Centre for Biomedical Technologies Queensland University of TechnologyBrisbaneQLDAustralia School of Mechanical Medical&Process EngineeringQueensland University of TechnologyBrisbaneQLDAustralia Central Analytical Research Facility Queensland University of TechnologyBrisbaneQLDAustralia Molecular Horizons University of WollongongWollongongNSWAustralia Department of Technical Physics University of Eastern FinlandKuopioFinland School of Electrical Engineering and Computer Science Faculty of EngineeringArchitecture and Information TechnologyUniversity of QueenslandBrisbaneQLDAustralia Centre for Microscopy and Microanalysis University of QueenslandBrisbaneQLDAustralia The Prince Charles Hospital BrisbaneQLDAustralia

Osteoarthritis(OA)is a debilitating degenerative disease affecting multiple joint tissues,including cartilage,bone,synovium,and adipose *** presents diverse clinical phenotypes and distinct molecular endotypes,including inflammatory,metabolic,mechanical,genetic,and synovial ***,innovative technologies are needed to support the development of effective diagnostic and precision therapeutic *** analysis of bulk OA tissue extracts has limitations due to technical constraints,causing challenges in the differentiation between various physiological and pathological phenotypes in joint *** issue has led to standardization difficulties and hindered the success of clinical *** insights into the spatial variations of the cellular and molecular structures in OA tissues,encompassing DNA,RNA,metabolites,and proteins,as well as their chemical properties,elemental composition,and mechanical attributes,can contribute to a more comprehensive understanding of the disease *** resolved biology enables biologists to investigate cells within the context of their tissue microenvironment,providing a more holistic view of cellular *** advances in innovative spatial biology techniques now allow intact tissue sections to be examined using various-omics lenses,such as genomics,transcriptomics,proteomics,and metabolomics,with spatial *** fusion of approaches provides researchers with critical insights into the molecular composition and functions of the cells and tissues at precise spatial ***,advanced imaging techniques,including high-resolution microscopy,hyperspectral imaging,and mass spectrometry imaging,enable the visualization and analysis of the spatial distribution of biomolecules,cells,and *** these molecular imaging outputs to conventional tissue histology can facilitate a more comprehensive characterization of disease *** review summarizes the rec

关键词： insight Spatial enable

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Application of Cooperative Learning and Flipped Classrooms in University Basketball Courses in China

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Journal of Contemporary Educational Research 2024年第6期8卷 36-43页

作者： Yun-Jie Li Wan Norizan Wan Hashim ross Azura Zahit Faculty of Cognitive Sciences and Human Development Universiti Malaysia Sarawak94300 Kota SamarahanSarawakMalaysia Qilu Institute of Technology Jinan 250200Shandong ProvinceChina

This study investigates the application of the teaching model combining cooperative learning and flipped classrooms in university basketball courses in *** analyzing the advantages and disadvantages of the traditional basketball teaching model and students’satisfaction with the course,the necessity of implementing cooperative learning and flipped classrooms is *** study planned in detail the implementation strategies before class,in the classroom,and after class,and compared them with the control group through an experimental *** experimental results showed that the new teaching mode demonstrated significant advantages in terms of learning outcomes,student satisfaction,and teacher *** study provides a valuable reference for the future reform of the physical education curriculum.

关键词： Cooperative learning Flipped classroom Teaching reform Basketball course Online publication:July 3,2024

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Infant feces-derived Bifidobacterium breve CCFM1078 inhibits the occurrence of rheumatoid cachexia by IRS1/PI3K/Akt signaling pathway

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Food Science and Human Wellness 2024年

作者： Bowen Li Mengfan Ding Chen Chi Guoxun Shi Xiaoming Liu Jianxin Zhao Paul ross Catherine Stanton Wei Chen Bo Yang State Key Laboratory of Food Science and Resources， Jiangnan University School of Food Science and Technology， Jiangnan University Department of Rheumatology， Jiangnan University Medical Center International Joint Research Center for Probiotics & Gut Health， Jiangnan University APC Microbiome Ireland， University College Cork Teagasc Food Research Centre National Engineering Research Center for Functional Food， Jiangnan University

This study aimed to investigate the effects of infant feces-derived Bifidobacterium breve CCFM1078 on rheumatoid cachexia （RC）. Twenty-four female Wistar rats were assigned to three groups: CON group （normal saline by gavage）， CIA group （collagen-induced arthritis， normal saline by gavage）， and CCFM1078 group (collagen-induced arthritis， 3×109CFU/rat/day B breve CCFM1078 gavage). The results demonstrated that B. breve CCFM1078 not only improved skeletal muscle function in CIA rats， but also modulated the gut microbiota， skeletal muscle metabolism and hormone levels， reduced inflammation in the knee joint and skeletal muscles， decreased activity of the NF-κB inflammatory signaling pathway， enhanced the IRS1/PI3K/Akt signaling pathway， promoted skeletal muscle differentiation， and maintained skeletal muscle fiber diameter， consequently slowing down the progression of RC. These findings suggested that B. breve CCFM1078 may have a beneficial role as part of a dietary intervention for RC， enhancing overall therapeutic effects.

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Lactobacillus acidophilus and Bifidobacterium breve alleviate neonatal maternal separation induced visceral hypersensitivity and non-spatial memory impairment in rats by the NGF/TrkA pathway

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Food Science and Human Wellness 2024年

作者： Chi Chen Bowen Li Mengfan Ding Huizhen Li Jianxin Zhao R.Paul ross Catherine Stanton Wei Chen Bo Yang State Key Laboratory of Food Science and Resources， Jiangnan University School of Food Science and Technology， Jiangnan University International Joint Research Center for Probiotics & Gut Health， Jiangnan University APC Microbiome Ireland， University College Cork Teagasc Food Research Centre， Moorepark National Engineering Research Center for Functional Food， Jiangnan University

Irritable bowel syndrome-diarrhea （IBS-D） is a prevalent functional bowel disease severely impairs the quality of life of patients. Visceral hypersensitivity （VH） is the main symptom of IBS-D. Probiotics have been found to effectively alleviate VH. In this study， neonatal maternal separation （NMS） was used to induce VH in 72 rats and investigated the effects of daily gavage of 3*109CFU of Lactobacillus and Bifidobacterium on alleviating the symptoms of IBS-D and behavioral interventions， as well as exploring potential mechanisms. The results demonstrated that Lactobacillus acidophilus and Bifidobacterium breve could alleviate the symptoms of IBS-D such as VH and increased frequency of bowel movements， as well as improving non-spatial memory in NMS rats. These effects were achieved by modulating the composition of gut microbiota and metabolites （including short-chain fatty acids， deoxycholic acid and adenosine）， and by regulating the expression of genes and proteins associated with the NGF/TrkA signaling pathway， tryptophan metabolism， and inflammatory factors in the hippocampus. This finding suggests that Lactobacillus acidophilus and Bifidobacterium breve have promising potential for the alleviation of IBS.

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Bifidobacterium longum subsp. infantis CCFM1269 promotes intestinal barrier and release of IFN-β through TLR4-TRIF dependent way in growing mice

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Food Science and Human Wellness 2024年

作者： Mengfan Ding Bo Yang Bowen Li Haiqin Chen Renqiang Yu R.Paul ross Catherine Stanton Shilong Jiang Jianxin Zhao Wei Chen State Key Laboratory of Food Science and Resources， Jiangnan University Teagasc Food Research Centre Nutrition and Metabolism Research Division， Innovation Center， Heilongjiang Feihe Dairy Co.， Ltd. Department of Neonatology， Wuxi Maternity and Child Health Care Hospital， Affiliated Women's Hospital of Jiangnan University National Engineering Research Center for Functional Food， Jiangnan University School of Food Science and Technology， Jiangnan University PKUHSC-China Feihe Joint Research Institute of Nutrition and Healthy Lifespan Development International Joint Research Center for Probiotics & Gut Health， Jiangnan University APC Microbiome Ireland， University College Cork

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 × 109CFU/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.

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Bifidobacterium breve CCFM1078 regulates bone development in growing BALB/c mice via gut microbiota and metabolites to balance bone formation and resorption

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Food Science and Human Wellness 2024年

作者： Bowen Li Mengfan Ding Xiaoming Liu Haiqin Chen Jianxin Zhao R.Paul ross Catherine Stanton Shilong Jiang Wei Chen Bo Yang Nutrition and Metabolism Research Division， Innovation Center， Heilongjiang Feihe Dairy Co.， Ltd. National Engineering Research Center for Functional Food， Jiangnan University State Key Laboratory of Food Science and Technology， Jiangnan University PKUHSC-China Feihe Joint Research Institute of Nutrition and Healthy Lifespan Development APC Microbiome Ireland， University College Cork School of Food Science and Technology， Jiangnan University International Joint Research Center for Probiotics & Gut Health， Jiangnan University Teagasc Food Research Centre

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 × 109CFU/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 GH/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.

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小苏打牙膏去除牙菌斑的机理研究

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口腔护理用品工业 2024年第4期34卷 22-24页

作者：史运明高兆鑫 ross Strand 北京宝洁技术有限公司北京101312 宝洁新加坡研发中心新加坡

目的:构建人原位牙菌斑生物膜模型,获得48小时菌斑生物膜,通过体外牙膏浆处理来研究小苏打(碳酸氢钠)牙膏去除牙菌斑的工作机理。方法:按纳入标准选取4名志愿者,将刻有凹槽的羟基磷灰石圆片固定于活动夹板,配戴夹板,于48小时后取出圆片... 详细信息

目的:构建人原位牙菌斑生物膜模型,获得48小时菌斑生物膜,通过体外牙膏浆处理来研究小苏打(碳酸氢钠)牙膏去除牙菌斑的工作机理。方法:按纳入标准选取4名志愿者,将刻有凹槽的羟基磷灰石圆片固定于活动夹板,配戴夹板,于48小时后取出圆片,经小苏打牙膏浆或磷酸缓冲液处理后于激光共聚焦显微镜下观察生物膜结构,检测生物膜厚度,以及其中钙离子荧光密度。进行随机区组单因素方差分析,SNK法进行均数两两比较。结果:小苏打牙膏浆处理前和处理后的48小时菌斑生物膜厚度分别为30.8±3.5μm和12.1±2.4μm,二者有显著统计学差异(P<0.05)。此外生物膜经小苏打牙膏浆处理后出现钙离子荧光密度密度明显降低(P<0.05)。结论:本实验通过体内收集自然完整的菌斑生物膜,观察小苏打牙膏对牙菌斑的去除效果。进一步发现菌斑的去除伴随着生物膜里的钙离子密度降低,说明小苏打牙膏不但机械去除菌斑,还能通过减少菌斑中钙离子从而有效化学瓦解牙菌斑。

关键词：牙菌斑模型菌斑生物膜小苏打碳酸氢钠激光共聚焦

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The Moon

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Acta Geochimica 2016年第1期35卷 1-13页

作者： ross taylor australian national university CanberraAustralia

Recent geochemical and geophysical data from the Moon enable a revision of earlier interpretations regarding lunar origin, structure and bulk composition. Earth and Moon show many similarities among their isotopic compositions, but they have evolved in totally dissimilar ways, probably related to the deficiency of water and volatile elements in the Moon as well as the vast differences in size and internal pressure. Some global geochemical differences from the Earth such as volatile depletion based on K/U ratios have been established. However, all current lunar samples come from differentiated regions, making the establishment of a bulk composition more reliant on bulk geophysical properties or isotopic similarities; it remains unclear how the latter arose or relate to whole Moon composition. The lack of fractionation effects among the refractory and super-refractory elements indicates that the proto-lunar material seems unlikely to have been vaporized while the presence of volatile elements may place lower limits on proto-lunar temperatures. The apparent lack of geochemical evidence of an impacting body enables other possible impactors, such as comets, to be considered. Although the origin of the Moon remains currently unknown, it is generally believed that the Moon originated as the result of a giant impact on the Earth.

关键词： Lunar origin Grand tack model Apollo Volatite elements

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