100,943 results match your criteria stress responses


Hormonal stress responses of growth hormone and insulin-like growth factor-I in highly resistance trained women and men.

Growth Horm IGF Res 2021 Jun 6;59:101407. Epub 2021 Jun 6.

Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA, USA.

The purpose of this study was to examine the responses of growth hormone (GH) and insulin-like growth factor-I (IGFI) to intense heavy resistance exercise in highly trained men and women to determine what sex-dependent responses may exist. Subjects were highly resistance trained men (N = 8, Mean ± SD; age, yrs., 21 ± 1, height, cm, 175. Read More

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Comparative analysis of alfalfa (Medicago sativa L.) seedling transcriptomes reveals genotype-specific drought tolerance mechanisms.

Plant Physiol Biochem 2021 May 29;166:203-214. Epub 2021 May 29.

Agricultural College, Ningxia University, Yinchuan, 750021, China. Electronic address:

Drought is one of the main abiotic factors that affect alfalfa yield. The identification of genes that control this complex trait can provide important insights for alfalfa breeding. However, little is known about how alfalfa responds and adapts to drought stress, particularly in cultivars of differing drought tolerance. Read More

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Orally administered nano-polystyrene caused vitellogenin alteration and oxidative stress in the red swamp crayfish (Procambarus clarkii).

Sci Total Environ 2021 May 29;791:147984. Epub 2021 May 29.

Dept. Life Sciences, University of Trieste, via L. Giorgieri 5, 34127 Trieste, Italy. Electronic address:

Nanoplastics (≤100 nm) represent the smallest fraction of plastic litter and may result in the aquatic environment as degradation products of larger plastic material. To date, few studies focused on the interactions of micro- and nanoplastics with freshwater Decapoda. The red swamp crayfish (Procambarus clarkii, Girard, 1852) is an invasive species able to tolerate highly perturbed environments. Read More

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Dysfunctional mitochondria as critical players in the inflammation of autoimmune diseases: Potential role in Sjögren's syndrome.

Autoimmun Rev 2021 Jun 9:102867. Epub 2021 Jun 9.

Programa de Biología Celular y Molecular, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile. Electronic address:

Relevant reviews highlight the association between dysfunctional mitochondria and inflammation, but few studies address the contribution of mitochondria and mitochondria-endoplasmic reticulum (ER) contact sites (MERCs) to cellular homeostasis and inflammatory signaling. The present review outlines the important role of mitochondria in cellular homeostasis and how dysfunctional mitochondrion can release and misplace mitochondrial components (cardiolipin, mitochondrial DNA (mtDNA), and mitochondrial formylated peptides) through multiple mechanisms. These components can act as damage-associated molecular patterns (DAMPs) and induce an inflammatory response via pattern recognition receptors (PRRs). Read More

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p53 regulated senescence mechanism and role of its modulators in age-related disorders.

Biochem Pharmacol 2021 Jun 9:114651. Epub 2021 Jun 9.

Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research- Raebareli, New Transit Campus, Bijnor-Sisendi Road, Sarojini Nagar, Near CRPF Base Camp, Lucknow Uttar Pradesh, 226301, India. Electronic address:

Multiple co-morbidities are associated with age, and there is a need for the broad-spectrum drug to prevent multiple regimens that may cause an adverse effect in the geriatric population. Cellular senescence is a primary mechanism for ageing in various tissues. p53, a tumor suppressor protein, plays a significant role in forming DNA damage foci and post different stress responses. Read More

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Cancer-induced muscle atrophy is determined by intrinsic muscle oxidative capacity.

FASEB J 2021 Jul;35(7):e21714

School of Physical Education and Sport, University of Sao Paulo, Sao Paulo, Brazil.

We tested the hypothesis that cancer cachexia progression would induce oxidative post-translational modifications (Ox-PTMs) associated with skeletal muscle wasting, with different responses in muscles with the prevalence of glycolytic and oxidative fibers. We used cysteine-specific isotopic coded affinity tags (OxICAT) and gel-free mass spectrometry analysis to investigate the cysteine Ox-PTMs profile in the proteome of both plantaris (glycolytic) and soleus (oxidative) muscles in tumor-bearing and control rats. Histological analysis revealed muscle atrophy in type II fibers in plantaris muscle, with no changes in plantaris type I fibers and no differences in both soleus type I and II fibers in tumor-bearing rats when compared to healthy controls. Read More

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Ecophysiological differentiation between life stages in filmy ferns (Hymenophyllaceae).

J Plant Res 2021 Jun 12. Epub 2021 Jun 12.

Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA, 02138, USA.

Desiccation tolerance was a key trait that allowed plants to colonize land. However, little is known about the transition from desiccation tolerant non-vascular plants to desiccation sensitive vascular ones. Filmy ferns (Hymenophyllaceae) represent a useful system to investigate how water-stress strategies differ between non-vascular and vascular stages within a single organism because they have vascularized sporophytes and nonvascular gametophytes that are each capable of varying degrees of desiccation tolerance. Read More

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Assessing Early Cardiac Outflow Tract Adaptive Responses Through Combined Experimental-Computational Manipulations.

Ann Biomed Eng 2021 Jun 11. Epub 2021 Jun 11.

Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, 304 Weill Hall, Ithaca, NY, 14853-7202, USA.

Mechanical forces are essential for proper growth and remodeling of the primitive pharyngeal arch arteries (PAAs) into the great vessels of the heart. Despite general acknowledgement of a hemodynamic-malformation link, the direct correlation between hemodynamics and PAA morphogenesis remains poorly understood. The elusiveness is largely due to difficulty in performing isolated hemodynamic perturbations and quantifying changes in-vivo. Read More

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LPMO-oxidized cellulose oligosaccharides evoke immunity in Arabidopsis conferring resistance towards necrotrophic fungus B. cinerea.

Commun Biol 2021 Jun 11;4(1):727. Epub 2021 Jun 11.

PhotoBioCatalysis Unit-BioCat, Crop Production and Biostimulation Laboratory CPBL and BTL, Université libre de Bruxelles, Brussels, Belgium.

Lytic Polysaccharide Monooxygenases (LPMOs) are powerful redox enzymes able to oxidatively cleave recalcitrant polysaccharides. Widely conserved across biological kingdoms, LPMOs of the AA9 family are deployed by phytopathogens to deconstruct cellulose polymers. In response, plants have evolved sophisticated mechanisms to sense cell wall damage and thus self-triggering Damage Triggered Immunity responses. Read More

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Delineation of an insula-BNST circuit engaged by struggling behavior that regulates avoidance in mice.

Nat Commun 2021 Jun 11;12(1):3561. Epub 2021 Jun 11.

Vanderbilt Center for Addiction Research, Vanderbilt University School of Medicine, Nashville, TN, USA.

Active responses to stressors involve motor planning, execution, and feedback. Here we identify an insular cortex to BNST (insula) circuit recruited during restraint stress-induced active struggling that modulates affective behavior. We demonstrate that activity in this circuit tightly follows struggling behavioral events and that the size of the fluorescent sensor transient reports the duration of the struggle event, an effect that fades with repeated exposure to the homotypic stressor. Read More

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BRS1 mediates plant redox regulation and cold responses.

BMC Plant Biol 2021 Jun 11;21(1):268. Epub 2021 Jun 11.

State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, China.

Background: Brassinosteroid-insensitive 1 suppressor 1 (BRS1) is a serine carboxypeptidase that mediates brassinosteroid signaling and participates in multiple developmental processes in Arabidopsis. However, little is known about the precise role of BRS1 in this context.

Results: In this study, we analyzed transcriptional and proteomic profiles of Arabidopsis seedlings overexpressing BRS1 and found that this gene was involved in both cold stress responses and redox regulation. Read More

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Circulating MicroRNA Responses to Postprandial Lipemia with or without Prior Exercise.

Int J Sports Med 2021 Jun 11. Epub 2021 Jun 11.

Department of Kinesiology, University of Maryland School of Public Health, College Park, United States.

Repeated exposure to a high-fat meal triggers inflammation and oxidative stress, contributing to the onset of cardiometabolic diseases. Regular exercise prevents cardiometabolic diseases and a prior bout of acute endurance exercise can counteract the detrimental cardiovascular effects of a subsequent high-fat meal. Circulating microRNAs (ci-miRs) are potential mediators of these vascular effects through regulation of gene expression at the posttranscriptional level. Read More

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Hypothalamic-Pituitary-Adrenal Axis Dysfunction by Early Life Stress.

Neurosci Lett 2021 Jun 8:136037. Epub 2021 Jun 8.

Centre for Affective Disorders, Institute of Psychiatry, Psychology and Neuroscience-King's College London, UK.

Evidence indicates that early life stress (ELS) may act as a risk factor for the development and maintenance of adulthood severe mental health disorders due to persistent dysregulation within the hypothalamic-pituitary-adrenal (HPA) axis. It is now broadly accepted that psychological stress may change the internal homeostatic state of an individual. The dysregulation seems to be a byproduct of changes noted in the HPA axis hormone's ability to bind to the glucocorticoid and mineralocorticoid receptors, crucial in maintaining homeostasis. Read More

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Signal transducer and activator of transcription 3 as a potential therapeutic target for Graves' orbitopathy.

Mol Cell Endocrinol 2021 Jun 8:111363. Epub 2021 Jun 8.

Department of Ophthalmology, Severance Hospital, Institute of Vision Research, Yonsei University College of Medicine, Seoul 03722, Korea. Electronic address:

The roles of signal transducer and activator of transcription 3 (STAT3) in inflammation, oxidative stress, and adipogenesis during Graves' orbitopathy (GO) are incompletely understood. Here, STAT3 expression in orbital tissues (from individuals with GO and healthy control subjects) was studied, and the role of STAT3 in GO pathogenesis was examined through small-interfering RNA (siRNA)-mediated silencing in primary orbital fibroblasts. STAT3 mRNA expression was significantly higher in GO orbital tissues than in non-GO tissues. Read More

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Stress, memory, and implications for major depression.

Behav Brain Res 2021 Jun 8:113410. Epub 2021 Jun 8.

Laboratory of Hormone Measures, Department of Physiology & Behavior, Federal University of Rio Grande do Norte, Natal, Brazil; Postgraduate Program of Psychobiology, Center for Biosciences, Federal University of Rio Grande do Norte, Natal, Brazil; National Science and Technology Institute for Translational Medicine, São Paulo, Brazil. Electronic address:

The stress response comprises a phylogenetically conserved set of cognitive, physiological, and behavioral responses that evolved as a survival strategy. In this context, the memory of stressful events would be adaptive as it could avoid re-exposure to an adverse event, otherwise the event would be facilitated in positively stressful or non-distressful conditions. However, the interaction between stress and memory comprises complex responses, some of them which are not yet completely understood, and which depend on several factors such as the memory system that is recruited, the nature and duration of the stressful event, as well as the timing in which this interaction takes place. Read More

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A copper-zinc-superoxide dismutase (CuZnSOD) from redlip mullet, Liza haematocheila: Insights to its structural characteristics, immune responses, antioxidant activity, and potent antibacterial properties.

Dev Comp Immunol 2021 Jun 8:104165. Epub 2021 Jun 8.

Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea; Marine Science Institute, Jeju National University, Jeju Self-Governing Province, 63333, Republic of Korea. Electronic address:

Copper-zinc superoxide dismutase (CuZnSOD) is a nuclear-encoded metalloenzyme responsible for scavenging harmful reactive oxygen species (ROS). In this study, the CuZnSOD homolog from redlip mullet (Liza haematochelia) (MuCuZnSOD) was structurally and functionally characterized to evaluate its antioxidant capacity, antibacterial properties, and protective level in various pathogenic stress conditions. Structural characteristics of MuCuZnSOD were evaluated using different bioinformatics tools. Read More

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Proteomic Characterization of Senescent Laryngeal Adductor and Plantaris Hindlimb Muscles.

Laryngoscope 2021 Jun 11. Epub 2021 Jun 11.

Department of Otolaryngology-Head and Neck Surgery, New York University Grossman School of Medicine, New York, New York, U.S.A.

Objectives: The goals of this study were to 1) compare global protein expression in muscles of the larynx and hindlimb and 2) investigate differences in protein expression between aged and nonaged muscle using label-free global proteomic profiling methods.

Methods: Liquid chromatography-mass spectrometry (LC-MS/MS) analysis was performed on thyroarytenoid intrinsic laryngeal muscle and plantaris hindlimb muscle from 10 F344xBN F1 male rats (5 old and 5 young). Protein expression was compared and pathway enrichment analysis performed for each muscle type (larynx and limb) and age group (old and young muscle). Read More

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Toward an Understanding of the Detection and Function of R-loops in Plants.

J Exp Bot 2021 Jun 11. Epub 2021 Jun 11.

State Key Laboratory for Crop Genetics and Germplasm Enhancement, JCIC-MCP, CIC-MCP, Nanjing Agricultural University, No.1 Weigang, Nanjing, Jiangsu 210095, P.R. China.

Although lagging behind studies in humans and other mammals, R-loop studies in plants have recently entered an exciting stage in which the roles of R-loops in gene expression, genome stability, epigenomic signatures, and plant development and stress responses are being elucidated. Here, we reviewed the strengths and weaknesses of existing methodologies, which were largely developed for R-loop studies in mammals, and then we discussed the potential challenges of applying these methodologies to R-loop studies in plants. We then focused on recent advances in the functional characterization of R-loops in Arabidopsis thaliana and rice. Read More

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Oxidative stress-induced senescence mediates inflammatory and fibrotic phenotypes in fibroblasts from systemic sclerosis patients.

Rheumatology (Oxford) 2021 Jun 11. Epub 2021 Jun 11.

Faculty of Pharmacy, Université de Montréal, Québec, Canada.

Objective: Systemic sclerosis (SSc) is an autoimmune connective tissue disorder characterized by inflammation and fibrosis. Although constitutive activation of fibroblasts is proposed to be responsible for the fibrotic and inflammatory features of the disease, the underlying mechanism remains elusive and, effective therapeutic targets are still lacking. The aim of this study was to evaluate the role of oxidative stress-induced senescence and its contribution to the pro-fibrotic and pro-inflammatory phenotypes of fibroblasts from SSc patients. Read More

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COVID-19 Pandemic Increased Anxiety Among Patients with Inflammatory Bowel Disease: A Patient Survey in a Tertiary Referral Center.

Dig Dis Sci 2021 Jun 11. Epub 2021 Jun 11.

Division of Gastroenterology and Hepatology, Department of Internal Medicine, Medical University of South Carolina, Charleston, SC, USA.

Background: COVID-19 is the first global pandemic in more than 100 years, and at its onset, the effects were largely unknown. Immunocompromised patients, including IBD, were presumed to have higher risk.

Aims: We hypothesized patients with IBD would have higher-than-baseline anxiety, high perceived vulnerability and significant lifestyle impacts as a result of the pandemic. Read More

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Plant tRNA-derived fragments: biogenesis and functions.

J Integr Plant Biol 2021 Jun 11. Epub 2021 Jun 11.

State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.

Processing of mature tRNAs produces complex populations of tRNA-derived fragments (tRFs). Emerging evidence shows that tRFs have important functions in bacteria, animals, and plants. Here, we review recent advances in understanding plant tRFs, focusing on their biological and cellular functions, such as regulating stress responses, mediating plant-pathogen interactions, and modulating posttranscriptional gene silencing and translation. Read More

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Type 2 diabetes impairs vascular responsiveness to nitric oxide, but not the venoarteriolar reflex or post-occlusive reactive hyperaemia in forearm skin.

Exp Dermatol 2021 Jun 11. Epub 2021 Jun 11.

Human and Environmental Physiology Research Unit, University of Ottawa, Ottawa, Canada.

The venoarteriolar reflex (VAR) is a local mechanism by which vasoconstriction is mediated in response to venous congestion. This response may minimize tissue overperfusion, preventing capillary damage and edema. Post-occlusive reactive hyperaemia (PORH) is used to appraise microvascular function performed by a brief local arterial occlusion resulting in a subsequent rapid transient vasodilation. Read More

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Antioxidant effects on hypoxia-induced oxidative stress and apoptosis in rat rotator cuff fibroblasts.

Eur Cell Mater 2021 Jun 11;41:680-693. Epub 2021 Jun 11.

Department of Orthopaedic Surgery, Gyeongsang National University School of Medicine and Gyeongsang National University Changwon Hospital, 11 Samjeongja-ro, Seongsan-gu, Changwon 51472, Republic of [email protected] gmail.com.

Most cells, highly sensitive to oxygen levels, undergo apoptosis under hypoxia. Therefore, the involvement of hypoxia in rotator cuff tendon degeneration has been proposed. While previous studies have reported that hypoxia induces apoptosis in rotator cuff fibroblasts (RCFs), little research has investigated whether antioxidants have cytoprotective effects against RCF apoptosis. Read More

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A Scoping Review of Non-Communicable Diseases and Maternal and Child Health Needs of Venezuelan Migrants in South America.

J Glob Health Rep 2021 15;5. Epub 2021 May 15.

Warren Alpert Medical School of Brown University, Providence, Rhode Island, United States.

Background: Migration of Venezuelan citizens to other South American countries has increased in recent years. While the prevalence, morbidity, and mortality of infectious diseases in Venezuelan migrants across South America appears to be well described, the non-communicable disease (NCD) and maternal and child health needs in this population is less clear. A scoping review of existing peer-reviewed primary research and grey literature describing the epidemiology of NCDs and maternal and child health needs in Venezuelan migrants in major South American host countries was performed in order to highlight important gaps in knowledge. Read More

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Tandem Mass Tag-Based Quantitative Proteomic Analysis of Chicken Bursa of Fabricius Infected With Reticuloendotheliosis Virus.

Front Vet Sci 2021 25;8:666512. Epub 2021 May 25.

College of Veterinary Medicine, Northeast Agricultural University, Harbin, China.

Reticuloendotheliosis virus (REV) is a type C avian retrovirus that causes immunosuppression, dwarf syndrome, and lymphoma in infected hosts. In this study, we used tandem mass tag (TMT) labeling and liquid chromatography-tandem mass spectrometry (LC-MS/MS) to characterize protein alterations in chicken bursa of Fabricius, before and after REV infection at 7, 14, 21, and 28 days. Our data showed that 1,127, 999, 910, and 1,138 differentially expressed proteins were significantly altered at 7, 14, 21, and 28 days after REV infection, respectively. Read More

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Vitamin D: Possible Therapeutic Roles in Hepatocellular Carcinoma.

Front Oncol 2021 25;11:642653. Epub 2021 May 25.

Department of Biochemistry, Covenant University, Ota, Nigeria.

Hepatocellular carcinoma (HCC) is a unique type of liver cancer instigated by underlying liver diseases. Pre-clinical evidence suggests that HCC progression, like other cancers, could be aided by vitamin D deficiency. Vitamin D is a lipid-soluble hormone usually obtained through sunlight. Read More

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Rhizospheric Protects cv. Geumsugangsan From Multiple Abiotic Stresses Multifarious Plant Growth-Promoting Attributes.

Front Plant Sci 2021 25;12:669693. Epub 2021 May 25.

Department of Applied Biosciences, Kyungpook National University, Daegu, South Korea.

Plant growth-promoting rhizobacteria (PGPR) are beneficial microorganisms that can be utilized to improve plant responses against biotic and abiotic stresses. In this study, we investigated whether PGPR () isolated from the endorhizosphere of have the potential to sustain pepper growth under drought, salinity, and heavy metal stresses. The bacterial strain was determined based on 16S rDNA and gyrB gene sequencing and characterized based on the following biochemical traits: nitrogen fixation; 1-aminocyclopropane-1-carboxylate deaminase activity; indole acetic acid production; inorganic phosphate, potassium, zinc, and silicon solubilization; and siderophore production. Read More

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Perceived Stress of Quarantine and Isolation During COVID-19 Pandemic: A Global Survey.

Authors:

Front Psychiatry 2021 25;12:656664. Epub 2021 May 25.

Understanding of the perceived stress and coping strategies adopted by people is important for contemplating the consequences of a pandemic on mental health of people globally. In this study, we intended to assess the perceived stress status under quarantine/isolation globally during the COVID-19 pandemic. This is a multicentre, multinational cross-sectional study that recruited isolated/quarantined individuals suspected or confirmed to have COVID-19 to assess the psychological impact of the quarantine/isolation experience by answering a survey distributed online. Read More

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Ameliorative Effect of Parishin C Against Cerebral Ischemia-Induced Brain Tissue Injury by Reducing Oxidative Stress and Inflammatory Responses in Rat Model.

Neuropsychiatr Dis Treat 2021 4;17:1811-1823. Epub 2021 Jun 4.

Department of Anesthesiology, the Second Affiliated Hospital of Hainan Medical University, Haikou, Hainan, 570311, People's Republic of China.

Background: Blume () is a widely used traditional Chinese herbal medicine in the clinical practice of China, to treat nervous headache, convulsions, dizziness, neurasthenia, and so on. Parishin C (Par C), one of the major bioactive components of Blume, is known to exert many different biological activities, including antipsychotic and neuroprotective effects. However, there is little research about its neuroprotective effect in an ischemic stroke model. Read More

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TLR4 signalling via Piezo1 engages and enhances the macrophage mediated host response during bacterial infection.

Nat Commun 2021 06 10;12(1):3519. Epub 2021 Jun 10.

State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiamen, Fujian, China.

TLR4 signaling plays key roles in the innate immune response to microbial infection. Innate immune cells encounter different mechanical cues in both health and disease to adapt their behaviors. However, the impact of mechanical sensing signals on TLR4 signal-mediated innate immune response remains unclear. Read More

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