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Dynamic changes in butyrate levels regulate satellite cell homeostasis by preventing spontaneous activation during aging

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Science China(Life Sciences) 2024年第4期67卷 745-764页

作者： Shujie Chen Liujing Huang Bingdong Liu Huimin Duan Ze Li Yifan Liu Hu Li Xiang Fu Jingchao Lin Yinlan Xu Li Liu Dan Wan Yulong Yin Liwei Xie Department of Endocrinology and Metabolism Zhujiang HospitalSouthern Medical UniversityGuangzhou 510280China State Key Laboratory of Applied Microbiology Southern China Guangdong Provincial Key Laboratory of Microbial Culture Collection and ApplicationGuangdong Open Laboratory of Applied MicrobiologyInstitute of MicrobiologyGuangdong Academy of SciencesGuangzhou 510070China School of Public Health Xinxiang Medical UniversityXinxiang 453003China Department of Infectious Diseases Nanfang HospitalSouthern Medical UniversityGuangzhou 510515China Metabo-Profile Biotechnology(Shanghai)Co.Ltd. Shanghai 201315China Institute of Aging Research Guangdong Provincial Key Laboratory of Medical Molecular DiagnosticsSchool of Medical TechnologyGuangdong Medical UniversityDongguan 524023China Department of Rehabilitation Medicine Nanfang HospitalSouthern Medical UniversityGuangzhou 510000China Laboratory of Animal Nutritional physiology and Metabolic Process Key Laboratory of Agro-ecological Processes in Subtropical RegionInstitute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125China Bioland Laboratory Guangzhou Regenerative Medicine and Health Guangdong LaboratoryGuangzhou 510005China

The gut microbiota plays a pivotal role in systemic metabolic processes and in particular functions,such as developing and preserving the skeletal muscle ***,the interplay between gut microbiota/metabolites and the regulation of satellite cell(SC)homeostasis,particularly during aging,remains *** propose that gut microbiota and its metabolites modulate SC physiology and homeostasis throughout skeletal muscle development,regeneration,and aging *** investigation reveals that microbial dysbiosis manipulated by either antibiotic treatment or fecal microbiota transplantation from aged to adult mice,leads to the activation of SCs or a significant reduction in the total ***,employing multi-omics(e.g.,RNA-seq,16S r RNA gene sequencing,and metabolomics)and bioinformatic analysis,we demonstrate that the reduced butyrate levels,alongside the gut microbial dysbiosis,could be the primary factor contributing to the reduction in the number of SCs and subsequent impairments during skeletal muscle ***,butyrate supplementation can mitigate the antibiotics-induced SC activation irrespective of gut microbiota,potentially by inhibiting the proliferation and differentiation of SCs/*** butyrate effect is likely facilitated through the monocarboxylate transporter 1(Mct1),a lactate transporter enriched on membranes of SCs and *** a result,butyrate could serve as an alternative strategy to enhance SC homeostasis and function during skeletal muscle *** findings shed light on the potential application of microbial metabolites in maintaining SC homeostasis and preventing skeletal muscle aging.

关键词： gut microbiota aging satellite cells butyrate Slc16a1(Mct1)

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Changes of macromolecular organizations in nonjunctional sarcolemmas after cross-innervation──a study offast-and slow-twitch muscle fibres in rats

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Cell Research 1995年第2期5卷 143-154页

作者： LU JIANLI TIEFENG ZHANG FUJIN QU BEIHUA QIAN SHIKAI HUANG(Shanghai Institute of physiology, Chinesc Academy of Scicnces, 320 Yue-Yang Road, Shanghai 200031, China) Shanghai Institute of physiology Chinese Academy of Sciences Shanghai China

The purpose of the present study was to analyse the changes of macromolecular organizations in nonjunctional sarcolemmas of different types of skeletal muscle fibres after cross-innervation. In normal rats the mean density of square arrays (6 nm particles organized in orthogonal arrays) was 9.02/μm2 for the nonjunctional sarcolemmas of fast-twitch extensor digitorum longus (control EDL,CE) nuscle fibres and 0.34/μm2 for the nonjunctional sarcolemmas of slow-twitch soleus (control SOL, CS) muscle fibres. After cross-innervation between the fast-twitch EDL and slow-twitch SOL muscle fibres by slow and fast muscle merves respectively for three months, the mean density was 0.45/μm2 for the nonjunetional sarcolemmas of the operated-EDL (OE) and 8.3/μm2 for the nonjunctional sarcolemmas of the operated SOL (OS). This indicates that the cross-innervation causes a reciprocal transformation of the number and distribution of such macromolecular organizations in the electrically excitable nonjunctional sarcolemmas.

关键词： Sarcolemma square array cross-innervation freeze-fracturing rat(Wistar)

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Gestational heat stress alters skeletal muscle gene expression profiles and vascularity in fetal pigs in a sexually dimorphic manner

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Journal of Animal Science and Biotechnology 2022年第6期13卷 1785-1798页

作者： Weicheng Zhao Mark P.Green Christina D.Marth Fan Liu Hieu H.Le Gordon S.Lynch Alan W.Bell Brian J.Leury Frank R.Dunshea Jeremy J.Cottrell School of Agriculture and Food Faculty of Veterinary and Agricultural SciencesThe University of MelbourneParkvilleVIC 3010Australia School of BioSciences Faculty of ScienceThe University of MelbourneParkvilleVIC 3010Australia Melbourne Veterinary School Faculty of Veterinary and Agricultural SciencesThe University of MelbourneWerribeeVIC 3030Australia Rivalea Australia Pty Ltd CorowaNSW 2646Australia Centre for muscle Research Department of Anatomy and PhysiologyThe University of MelbourneParkville 3010Australia Department of Animal Science Cornell UniversityIthacaNY 14853-4801USA Faculty of Biological Sciences The University of LeedsLeeds LS29JTUK

Background: There is evidence that sow heat stress(HS) during gestation affects fetal development with implications for impaired muscle growth. We have previously demonstrated that maternal HS during early to midgestation compromised muscle fibre hyperplasia in developing fetal pigs. Thus, we hypothesised these phenotypic changes are associated with a change in expression of genes regulating fetal skeletal muscle development and metabolism. To test this, at d 60 of gestation, RNA sequencing and immunohistochemistry were performed on fetal longissimus dorsi(LD) muscle biopsies collected from pregnant gilts that had experienced either thermoneutral control(CON, 20 ℃, n = 7 gilts, 18 LD samples) or controlled HS(cyclic 28 to 33 ℃, n = 8 gilts, 23 LD samples)conditions for 3 ***: A total of 282 genes were differentially expressed between the HS and CON groups in female LD muscles(false discovery rate(FDR) ≤ 0.05), whereas no differentially expressed genes were detected in male LD muscles between the two groups(FDR > 0.05). Gestational HS increased the expression of genes associated with transcription corepressor activity, adipogenesis cascades, negative regulation of angiogenesis and pro-inflammatory signalling in female LD muscles. Immunohistochemical analyses revealed a decreased muscle vascularity density in fetuses from HS group for both sexes compared to those from the CON group(P = 0.004).Conclusions: These results reveal gilt HS during early to mid-gestation altered gene expression profiles in fetal LD muscles in a sexually dimorphic manner. The molecular responses, including transcription and angiogenesis repressions and enhanced adipogenesis cascades, were exclusively observed in females. However, the associated reductions in muscle vascularity were observed independently of sexes. Collectively this may indicate female fetal pigs are more adaptive to gestational HS in terms of gene expression changes, and/or there may be sexually dimorphic differences

关键词： Adipogenesis Angiogenesis Fetal pig Gestation Heat stress Sexual dimorphism skeletal muscle Sows

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Effect of electrical stimulation on neural regeneration via the p38-RhoA and ERK1/2-Bcl-2 pathways in spinal cord-injured rats

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Neural Regeneration Research 2018年第2期13卷 340-346页

作者： Min Cheol Joo Chul Hwan Jang Jong Tae Park Seung Won Choi Seungil Ro Min Seob Kim Moon Young Lee Department of Rehabilitation Medicine and Institute of Wonkwang Medical Science School of Medicine Wonkwang University Department of Neurosurgery School of Medicine Wonkwang University Department of Anesthesiology and Pain Medicine School of Medicine Wonkwang University Department of physiology and Cell Biology School of Medicine University of Nevada Department of physiology and Institute of Wonkwang Medical Science School of Medicine Wonkwang University

Although electrical stimulation is therapeutically applied for neural regeneration in patients, it remains unclear how electrical stimulation exerts its effects at the molecular level on spinal cord injury （SCI）. To identify the signaling pathway involved in electrical stimulation improving the function of injured spinal cord, 21 female Sprague-Dawley rats were randomly assigned to three groups： control （no surgical intervention, n = 6）, SCI （SCI only, n = 5）, and electrical simulation （ES; SCI induction followed by ES treatment, n = 10）. A complete spinal cord transection was performed at the 10^th thoracic level. Electrical stimulation of the injured spinal cord region was applied for 4 hours per day for 7 days. On days 2 and 7 post SCI, the Touch-Test Sensory Evaluators and the Basso-Beattie-Bresnahan locomotor scale were used to evaluate rat sensory and motor function. Somatosensory-evoked potentials of the tibial nerve of a hind paw of the rat were measured to evaluate the electrophysiological function of injured spinal cord. Western blot analysis was performed to measure p38-RhoA and ERK1/2-Bcl-2 pathways related protein levels in the injured spinal cord. Rat sensory and motor functions were similar between SCI and ES groups. Com- pared with the SCI group, in the ES group, the latencies of the somatosensory-evoked potential of the tibial nerve of rats were significantly shortened, the amplitudes were significantly increased, RhoA protein level was significantly decreased, protein gene product 9.5 expression, ERK1/2, p38, and Bcl-2 protein levels in the spinal cord were significantly increased. These data suggest that ES can promote the recovery of electrophysiological function of the injured spinal cord through regulating p38-RhoA and ERK1/2-Bcl-2 pathway-related protein levels in the injured spinal cord.

关键词： Bcl-2 ERKI/2 p38 PGP9.5 RhoA spinal cord injury somatosensory evoked potential muscle contraction electrical impulses neural regeneration

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Exercise-induced oxidative stress:Friend or foe?

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Journal of Sport and Health Science 2020年第5期9卷 415-425页

作者： Scott K.Powers Rafael Deminice Mustafa Ozdemir Toshinori Yoshihara Matthew P.Bomkamp Hayden Hyatt Department of Applied physiology and Kinesiology University of FloridaGainesvilleFL32608USA Department of Physical Education State University of LondrinaLondrina10011Brazil Department of Exercise and Sport Sciences Hacettepe UniversityAnkara06800Turkey Department of Exercise physiology Juntendo UniversityTokyo270-1695Japan

The first report demonstrating that prolonged endurance exercise promotes oxidative stress in humans was published more than 4 decades *** this discovery,many ensuing investigations have corroborated the fact that muscular exercise increases the production of reactive oxygen species(ROS)and results in oxidative stress in numerous tissues including blood and skeletal *** several tissues may contribute to exercise-induced ROS production,it is predicted that muscular contractions stimulate ROS production in active muscle fibers and that skeletal muscle is a primary source of ROS production during *** contraction-induced ROS generation is associated with(1)oxidant damage in several tissues(e.g.,increased protein oxidation and lipid peroxidation),(2)accelerated muscle fatigue,and(3)activation of biochemical signaling pathways that contribute to exercise-induced adaptation in the contracting muscle *** our understanding of exercise and oxidative stress has advanced rapidly during the last decades,questions remain about whether exercise-induced increases in ROS production are beneficial or harmful to *** review addresses this issue by discussing the site(s)of oxidant production during exercise and detailing the health consequences of exercise-induced ROS production.

关键词： Hormesis Oxidants Radicals Reactive oxygen species skeletal muscle

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Alterations in renin-angiotensin receptors are not responsible for exercise preconditioning of skeletal muscle fibers

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Sports Medicine and Health Science 2021年第3期3卷 148-156页

作者： Branden L.Nguyen Toshinori Yoshihara Rafael Deminice Jensen Lawrence Mustafa Ozdemir Hayden Hyatt Scott K.Powers Department of Applied physiology and Kinesiology University of FloridaGainesville32611FloridaUSA Department of Exercise physiology Juntendo UniversityTokyo270-1695Japan Department of Physical Education University of Estadual of LondrinaLondrina10011Brazil

Endurance exercise training promotes a protective phenotype in skeletal muscle known as exercise *** preconditioning protects muscle fibers against a variety of threats including inactivity-induced muscle *** mechanism(s)responsible for exercise preconditioning remain unknown and are explored in these ***,we investigated the impact of endurance exercise training on key components of the renin-angiotensin system(RAS).The RAS was targeted because activation of the classical axis of the RAS pathway via angiotensinⅡtypeⅠreceptors(AT1Rs)promotes muscle atrophy whereas activation of the non-classical RAS axis via Mas receptors(MasRs)inhibits the atrophic signaling of the classical RAS *** by prior studies,we hypothesized that an exercise-induced decrease in AT1Rs and/or increases in MasRs in skeletal muscle fibers is a potential mechanism responsible for exercise *** endurance exercise training in rats,we examined the abundance of AT1Rs and MasRs in both locomotor and respiratory *** results indicate that endurance exercise training does not alter the protein abundance of AT1Rs or MasRs in muscle fibers from the diaphragm,plantaris,and soleus muscles compared to sedentary controls(p>0.05).Furthermore,fluorescent angiotensinⅡ(AngⅡ)binding analyses confirm our results that exercise pre-conditioning does not alter the protein abundance of AT1Rs in the diaphragm,plantaris,and soleus(p>0.05).This study confirms that exercise-induced changes in RAS receptors are not a key mechanism that contributes to the beneficial effects of exercise preconditioning in skeletal muscle fibers.

关键词： Exercise preconditioning Renin-angiotensin system skeletal muscle disuse atrophy skeletal muscle

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Contribution of Water and Lipid Soluble Substances in the Relaxant Effects of Tymus Vulgaris Extract on Guinea Pig Tracheal Smooth muscle in Vitro

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Chinese Journal of Integrative Medicine 2016年第5期22卷 377-383页

作者： Rana Keyhanmanesh Mohammad Hossien Boskabady Mohammad Ali Ebrahimi Saadatloo Morteza Boskabady Drug Applied Research Center Tabriz University of Medical Sciences Tuberculosis and Lung Research Center Tabriz University of Medical Sciences Department of physiology Tabriz University of Medical Sciences Department of physiology School of MedicineMashhad University of Medical Sciences Neurogenic Inflammation Research Center Mashhad University of Medical Sciences Department of Basic sciences Islamic Azad University

Objective： To examine the relaxant effects of hydro-ethanolic, macerated aqueous （MA） and lipid- free macerated aqueous （LFMA） extract of Tymus vulgaris on tracheal chains of guinea pigs. Methods： The relaxant effects of five cumulative concentrations of each extract （0.4, 0.8, 1.2, 1.6 and 2.0 g/100 mL） were compared with saline as negative control and five cumulative concentrations of theophylline （0.1, 0.2, 0.4, 0.6 and 0.8 mmol/L） on precontracted tracheal smooth muscle of guinea pig with 60 mmol/L KCl （group 1） and 10 μmol/L methacholine （group 2, n=6 for each group）. Results： In group 1 all concentrations of theophylline, three higher concentrations of hydro-ethanolic, two concentrations of LFMA and last concentration of MA extracts showed significant relaxant effects compared with that of saline （P〈0.05 or P〈0.01）. Two lower concentrations of LFMA and all concentrations of MA except higher one caused contraction compared with saline （P〈0.05 or 0.01）. In group 2 experiments, all concentrations of theophylline, hydro-ethanolic, MA and LFMA extracts showed significant relaxant effects compared to that of saline （P〈0.05 or P〈0.01）. In both groups, the relaxant effect of all concentrations of hydro-ethanolic extract were significantly higher than most concentrations of others （P〈0.05 or P〈0.01）. The relaxant effect of different concentrations of three extracts were significantly greater in group 2 compared with group 1 experiments （all P〈0.01）. There were significantly positive correlations between the relaxant effects and concentrations for theophylline and all extracts in both groups （P〈0.05 or P〈0.01）. Conclusion： Hydro-ethanolic extract has a potent weaker relaxant effect for other extracts from Tymus vulgaris on tracheal chains of guinea pigs.

关键词： Tymus vulgaris hydro-ethanolic extract macerated aqueous extract lipid-free macerated aqueous extract relaxant effect guinea pig tracheal

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Potential immunomodulation effect of the extract of Nigella sativa on ovalbumin sensitized guinea pigs

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第3期12卷 201-209页

作者： Mohammad-Hossein BOSKABADY Rana KEYHANMANESH Saeed KHAMENEH Yousef DOOSTDAR Mohammad-Reza KHAKZAD Pharmaceutical Research Centre Department of PhysiologySchool of MedicineMashhad University of Medical Sciences Department of physiology Tabriz University of Medical Sciences Tuberculosis and Lung Research Centre Tabriz University of Medical Sciences Drug Applied Research Centre Tabriz University of Medical Sciences Department of Pathology Islamic Azad University Zakaria Research Center Islamic Azad University

Several different pharmacological effects have been described for Nigella sativa(Siah-Daneh) ,including an anti-inflammatory *** the present study,the effect of the extract of *** on lung pathology and blood interleukin-4(IL-4) and interferon-γ(IFN-γ) of sensitized guinea pigs was *** groups(n=8 for each group) of guinea pigs sensitized to ovalbumin(OA) were given drinking water alone,and drinking water containing low and high concentrations of the plant extract,*** animals of the control group(n=8) were treated with saline instead of OA and were given drinking *** pathological changes of the lung,including infiltration of eosinophils and lymphocytes,local epithelial necrosis,the presence of oedema,thickening of the basement membrane,smooth muscle layer hypertrophy,mucosal secretion,and the presence of mucosal plug,and blood IL-4 and IFN-γof sensi-tized guinea pigs were *** lungs of the sensitized group showed significant pathological changes(Pgroup treated with low concentration of the extract,but an increased IFN-γ.These results confirm a preventive effect of *** extract on lung inflammation of sensitized guinea pigs.

关键词： Nigella sativa Asthma Sensitization Inflammation Cytokine

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Loss of cavin1 and expression of p-caveolin-1 in pulmonary hypertension: Possible role in neointima formation

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World Journal of Hypertension 2019年第2期9卷 17-29页

作者： Jing Huang Rajamma Mathew Department of Pediatrics New York Medical College Department of physiology New York Medical College

BACKGROUND Pulmonary hypertension(PH) is a progressive disease with a high morbidity and mortality rate; and neointima formation leads to the irreversibility of the *** have previously reported that in rats, monocrotaline(MCT) injection leads to progressive disruption of endothelial cells(EC), and endothelial caveolin-1(cav-1) loss, accompanied by the activation of pro-proliferative pathways leading to PH. Four weeks post-MCT, extensive endothelial cav-1 loss is associated with increased cav-1 expression in smooth muscle cells(SMC). Exposing the MCTtreated rats to hypoxia hastens the disease process; and at 4 wk, neointimal lesions and occlusion of the small arteries are *** To identify the alterations that occur during the progression of PH that lead to neointima *** Male Sprague-Dawley rats(150-175 g) were divided in 4 groups(n = 6-8 per group): controls(C); MCT(M, a single sc injection 40 mg/kg); Hypoxia(H,hypobaric hypoxia); MCT + hypoxia(M+H, MCT-injected rats subjected to hypobaric hypoxia starting on day1). Four weeks later, right ventricular systolic pressure(RVSP), right ventricular hypertrophy(RVH), lung histology, and cav-1 localization using immunofluorescence technique were analyzed. In addition, the expression of cav-1, tyrosine 14 phosphorylated cav-1(p-cav-1), caveolin-2(cav-2), cavin-1, vascular endothelial cadherin(VE-Cad) and p-ERK1/2 in the lungs were examined, and the results were compared with the *** PH and right ventricular hypertrophy were present in M and H groups [RVSP, mmHg, M 54±5~*, H 45±2~*, vs C 20±1, P group [RVSP 69±9 mmHg, RV/LV 0.59±0.01 P groups revealed medial hypertrophy; but only M+H group exhibited small occluded arteries and neointimal lesions. Immunofluorescence studies revealed endothelial cav-1 loss and increased cav-1 e

关键词： Caveolin-1 Cavin-1 Neointima Phospho-caveolin1 Pulmonary hypertension

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Mechanism of hypothalamic paraventricular nucleus in regulating asthmatic attack

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Neural Regeneration Research 2006年第7期1卷 593-596页

作者： Jia Liu Rong Dong Jian Xiao Nina Liu Department of physiology and Pharmacology School of Basic Medical SciencesSoutheast UniversityNanjing 210009Jiangsu ProvinceChina

BACKGROUND:It has been confirmed that c-fos expression increased markedly in hypothalamic paraventricular nucleus(PVN)during asthmatic attack in rats,and PVN has extensive physiological functions,involving in the regulation of respiratory system,***:To observe the alteration of electroencephalogram(EEG)and power spectra in PVN during the asthmatic attack,and the alteration of lung function and diaphragmatic muscle discharge after bilateral PVN lesion in asthmatic ***:A randomized control ***:Laboratory of physiology and Pharmacology,School of Basic Medical Sciences,Southeast ***:Forty-eight male adult SD rats of 260-300 g were *** rats were randomly divided into 6 groups(n=8):control group,asthma group,electrolytic lesion of PVN group,KA-induced lesion of PVN group,sham electrolytic lesion of PVN group and sham kainic acid(KA)-induced lesion of PVN ***,chicken ovalbumin and aluminum hydroxide were purchased from American Sigma *** pertussis vaccine(Institute of Biological Products of Shanghai);stereotaxic apparatus(JiangwanⅡ,China);lesion-producing device(YC-2 programmable stimulato,Chengdu Instrument Company);MD2000 signal processing system(Nanjing Medical School);data acquisition system(RM6240B,Chengdu Instrument Company).METHODs:The experiments were carried out in the Laboratory of physiology and Pharmacology,School of Basic Medical Sciences,Southeast University from January to August in 2006.①Rats except for control group were sensitized with an intraperitoneal injection of 100 mg chicken ovalbumin and 100 mg aluminum hydroxide and Bordetella pertussis vaccine containing 5×10^(9) heat-killed in 1 mL of sterile *** the fifteenth to seventeenth days rats received three times aerosolized ovalbumin *** rats of the control group and asthma group three steel electrodes were placed into the left PVN(AP-1.8 mm,LR 0.4 mm,OH-7.9 mm),parietal cortex and subcutaneous tissue in lower limb.

关键词： PVN Mechanism of hypothalamic paraventricular nucleus in regulating asthmatic attack

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