10,270 results match your criteria Pharmacologic Stress Testing

A case report: adenosine triggered myocardial infarction during myocardial perfusion stress test imaging in a diabetic patient.

Eur Heart J Case Rep 2021 Apr 30;5(4):ytab133. Epub 2021 Apr 30.

Department of Cardiology, Amphia Hospital, Breda, Amphia Ziekenhuis, Molengracht 21, 4818 CK, Breda, The Netherlands.

Background: Myocardial perfusion imaging (MPI) using single-photon emission computed tomography (SPECT) can in general be used safely in daily clinical practice. However, under the right circumstances, it can lead to serious complications.

Case Summary: A 68-year-old female patient with diabetes and a history of inferior ST-elevation myocardial infarction 8 years earlier, visited our outpatient clinic with atypical chest discomfort. Read More

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The Benefits of High-Intensity Interval Training on Cognition and Blood Pressure in Older Adults With Hypertension and Subjective Cognitive Decline: Results From the Heart & Mind Study.

Front Aging Neurosci 2021 15;13:643809. Epub 2021 Apr 15.

Centre for Studies in Family Medicine, Department of Family Medicine, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada.

The impact of exercise on cognition in older adults with hypertension and subjective cognitive decline (SCD) is unclear. We determined the influence of high-intensity interval training (HIIT) combined with mind-motor training on cognition and systolic blood pressure (BP) in older adults with hypertension and SCD. We randomized 128 community-dwelling older adults [age mean (SD): 71. Read More

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Hydrocephalus Following Experimental Subarachnoid Hemorrhage in Rats with Different Aerobic Capacity.

Int J Mol Sci 2021 Apr 26;22(9). Epub 2021 Apr 26.

Department of Neurosurgery, University of Michigan, Ann Arbor, MI 48109, USA.

Low aerobic capacity is considered to be a risk factor for stroke, while the mechanisms underlying the phenomenon are still unclear. The current study looked into the impacts of different aerobic capacities on early brain injury in a subarachnoid hemorrhage (SAH) model using rats bred for high and low aerobic capacity (high-capacity runners, HCR; low-capacity runners, LCR). SAH was modeled with endovascular perforation in HCR and LCR rats. Read More

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Co-released norepinephrine and galanin act on different timescales to promote stress-induced anxiety-like behavior.

Neuropsychopharmacology 2021 Apr 28. Epub 2021 Apr 28.

Department of Human Genetics, Emory University, Atlanta, GA, USA.

Both the noradrenergic and galaninergic systems have been implicated in stress-related neuropsychiatric disorders, and these two neuromodulators are co-released from the stress-responsive locus coeruleus (LC); however, the individual contributions of LC-derived norepinephrine (NE) and galanin to behavioral stress responses are unclear. Here we aimed to disentangle the functional roles of co-released NE and galanin in stress-induced behavior. We used foot shock, optogenetics, and behavioral pharmacology in wild-type (WT) mice and mice lacking either NE (Dbh) or galanin (Gal) specifically in noradrenergic neurons to isolate the roles of these co-transmitters in regulating anxiety-like behavior in the elevated zero maze (EZM) either immediately or 24 h following stress. Read More

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A novel homozygous missense mutation p.P388S in causes protein instability and retinitis pigmentosa.

Mol Vis 2021 2;27:179-190. Epub 2021 Apr 2.

Department of Ophthalmology, University of Texas Southwestern Medical Center, Dallas, Texas, United States.

Purpose: Retinitis pigmentosa (RP) is an inherited retinal disorder that results in the degeneration of photoreceptor cells, ultimately leading to severe visual impairment. We characterized a consanguineous family from Southern India wherein a 25 year old individual presented with night blindness since childhood. The purpose of this study was to identify the causative mutation for RP in this individual as well as characterize how the mutation may ultimately affect protein function. Read More

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Stress testing and myocardial perfusion imaging for patients after recovery from severe COVID-19 infection requiring hospitalization: A single-center experience.

J Nucl Cardiol 2021 Apr 26. Epub 2021 Apr 26.

Division of Cardiovascular Disease, Department of Medicine, University of Alabama at Birmingham, LHRB 326, 701 19th Street South, Birmingham, AL, 35294, USA.

Background: As the coronavirus pandemic progresses, patients that have recovered from COVID-19-related hospitalization require resumption of care for other medical issues. Thus far, the literature has not detailed the experience of stress testing in this patient population.

Methods: We retrospectively reviewed patients that recovered from COVID-19-related hospitalizations and underwent SPECT MPI studies at the University of Alabama at Birmingham Medical Center. Read More

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Peak Oxygen Consumption Achieved at the End of Cardiac Rehabilitation Predicts Long-Term Survival in Patients with Coronary Heart Disease.

Eur Heart J Qual Care Clin Outcomes 2021 Apr 24. Epub 2021 Apr 24.

John Ochsner Heart and Vascular Institute, Ochsner Clinical School-the University of Queensland School of Medicine, New Orleans, LA.

Background: Cardiac rehabilitation (CR) improves survival in patients with coronary heart disease (CHD), which is largely mediated by the improvements in cardiorespiratory fitness (CRF) defined as peak oxygen consumption (VO2). Therefore, measuring CRF is essential to predict long-term outcomes in this population. It is unclear, however, whether peak VO2 achieved at the end of CR (END-peak VO2) predicts survival or whether the changes of CRF achieved during CR provide a greater prognostic value. Read More

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Fat-body brummer lipase determines survival and cardiac function during starvation in .

iScience 2021 Apr 9;24(4):102288. Epub 2021 Mar 9.

Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Pharmacology, Center for Cardiovascular Research, CCR, Hessische Str. 3-4, 10115 Berlin, Germany.

The cross talk between adipose tissue and the heart has an increasing importance for cardiac function under physiological and pathological conditions. This study characterizes the role of fat body lipolysis for cardiac function in . Perturbation of the function of the key lipolytic enzyme, (), an ortholog of the mammalian (adipose triglyceride lipase) exclusively in the fly's fat body, protected the heart against starvation-induced dysfunction. Read More

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LKB1 down-modulation by miR-17 identifies NSCLC patients with worse prognosis eligible for energy-stress based treatments.

J Thorac Oncol 2021 Apr 19. Epub 2021 Apr 19.

Tumor Genomics Unit, Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori, 20133 Milan, Italy.

Introduction: Preclinical models recently unveiled vulnerability of LKB1/KRAS co-mutated non-small cell lung cancer (NSCLC) to metabolic stress-based treatments. Since miR-17 is a potential epigenetic regulator of LKB1, we hypothesized that wild type LKB1 NSCLC with high miR-17 expression may be sensitive to energetic stress condition, and eligible for metabolic frailties-based therapeutic intervention.

Methods: We took advantage of NSCLC cell lines with different combinations of KRAS mutation and LKB1 deletion, and of patient-derived xenografts (PDXs) with high (L/miR17H) or low (L/miR17L) miR-17 expression. Read More

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New Formula to Predict Heart Rate at Anaerobic Threshold That Considers the Effects of β-Blockers in Patients With Myocardial Infarction: MULTI-INSTITUTIONAL RETROSPECTIVE CROSS-SECTIONAL STUDY.

J Cardiopulm Rehabil Prev 2021 Apr 16. Epub 2021 Apr 16.

Department of Rehabilitation Medicine, St Marianna University School of Medicine Yokohama City Seibu Hospital, Yokohama, Japan (Drs Nemoto and Kasahara); Department of Rehabilitation Sciences, Kitasato University Graduate School of Medical Sciences, Sagamihara, Japan (Drs Nemoto, Kamiya, and Matsunaga); Department of Public Health, Kobe University Graduate School of Health Sciences, Kobe, Japan (Dr Izawa); Department of Rehabilitation Medicine, St Marianna University School of Medicine Hospital, Kawasaki, Japan (Messrs Watanabe and Takeichi); Department of Rehabilitation Medicine, Kawasaki Municipal Tama Hospital, Kawasaki, Japan (Mr Yoshizawa); Division of Cardiology, Department of Internal Medicine, St Marianna University School of Medicine Hospital, Kawasaki, Japan (Drs Suzuki and Akashi); Department of Internal Medicine, Shimazu Medical Clinic, Yokohama, Japan (Dr Omiya); and Department of Pharmacology, St Marianna University School of Medicine, Kawasaki, Japan (Dr Kida).

Purpose: It is recommended that patients with myocardial infarction (MI) be prescribed exercise by target heart rate (HR) at the anaerobic threshold (AT) via cardiopulmonary exercise testing (CPX). Although percent HR reserve using predicted HRmax (%HRRpred) is used to prescribe exercise if CPX or an exercise test cannot be performed, %HRRpred is especially difficult to use when patients take β-blockers. We devised a new formula to predict HR at AT (HRAT) that considers β-blocker effects in MI patients and validated its accuracy. Read More

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A novel approach to improve detection of glucocorticoid doping in sport with new guidance for physicians prescribing for athletes.

Br J Sports Med 2021 Apr 20. Epub 2021 Apr 20.

International Testing Agency, Lausanne, Switzerland

The systemic effect of glucocorticoids (GCs) following injectable routes of administration presents a potential risk to both improving performance and causing harm to health in athletes. This review evaluates the current GC antidoping regulations defined by the World Anti-Doping Agency and presents a novel approach for defining permitted and prohibited use of glucocorticoids in sport based on the pharmacological potential for performance enhancement (PE) and risk of adverse effects on health. Known performance-enhancing doses of glucocorticoids are expressed in terms of cortisol-equivalent doses and thereby the dose associated with a high potential for PE for any GC and route of administration can be derived. Read More

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Extreme blood lactate rising after very short efforts in top-level track and field male sprinters.

Res Sports Med 2021 Apr 20:1-7. Epub 2021 Apr 20.

Centre of Research, Education, Innovation and Intervention in Sport (CIFI2D) and Faculty of Sport, University of Porto, Porto, Portugal.

Two top-level (10"04 and 10"13 in 100-m dash) and 2 sub-elite (10"97 and 11"44 in 100-m dash) male sprinters completed, after a standardised warm-up, various jump, sprint and weightlifting exercises in two consecutive days at the start of pre-season. Before and 30 s after the tests, the [La] were measured with a portable lactate analyser. The top-level sprinters exhibited much larger [La] than the sub-elite sprinters (< 5 mmol·L) after all the exercise tests. Read More

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Intrinsic exercise capacity induces divergent vascular plasticity via arachidonic acid-mediated inflammatory pathways in female rats.

Vascul Pharmacol 2021 Apr 16:106862. Epub 2021 Apr 16.

Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA. Electronic address:

Metabolic syndrome prevalence has increased among US adults, particularly among non-hispanic white and black women. Sedentary behavior often leads to chronic inflammation, a triggering factor of metabolic syndrome. Given that intrinsic exercise capacity is genetically inherited, we questioned if low-grade chronic inflammation would be present in a female rat model of low intrinsic exercise capacity-induced metabolic syndrome, while beneficial increase of resolution of inflammation would be present in a female rat model of high intrinsic exercise capacity. Read More

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Exercise and fluoxetine treatment during adolescence protect against early life stress-induced behavioral abnormalities in adult rats.

Pharmacol Biochem Behav 2021 Apr 15;205:173190. Epub 2021 Apr 15.

Department of Pharmacology, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran. Electronic address:

Depression is a psychiatric disorder with several comorbidities that has a complicated pathophysiology. Multiple mechanisms such as abnormal hypothalamic-pituitary adrenal (HPA) axis activity, neurotransmission (namely serotonin), and immune-inflammatory responses are involved in the pathophysiology of disease. In this study, we hypothesized that applying exercise (running wheel (RW) and treadmill (TM)) or fluoxetine (FLX) during adolescence could protect adult rats against the negative impact of early-life stress. Read More

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Cardiovascular and Autonomic Responses after a Single Bout of Resistance Exercise in Men with Untreated Stage 2 Hypertension.

Int J Hypertens 2021 29;2021:6687948. Epub 2021 Mar 29.

Laboratory of Exercise Sciences, Department of Physiology and Pharmacology, Fluminense Federal University, Niteroi, State of Rio de Janeiro, Brazil.

The aim of this paper is to assess the integrated responses of ambulatory blood pressure (BP), cardiac autonomic modulation, spontaneous baroreflex sensitivity (BRS), and vascular reactivity after a single bout of resistance exercise (RE) in men with stage 2 hypertension who have never been treated before. Ten hypertensive men were subjected to a RE session of three sets of 20 repetitions and an intensity of 40% of the 1-repetition maximum (RM) test in seven different exercises. For the control (CTR) session, the volunteers were positioned on the exercise machines but did not perform any exercise. Read More

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Photobiomodulation prevents PTSD-like memory impairments in rats.

Mol Psychiatry 2021 Apr 15. Epub 2021 Apr 15.

Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, Augusta University, Augusta, GA, USA.

A precise fear memory encoding a traumatic event enables an individual to avoid danger and identify safety. An impaired fear memory (contextual amnesia), however, puts the individual at risk of developing posttraumatic stress disorder (PTSD) due to the inability to identify a safe context when encountering trauma-associated cues later in life. Although it is gaining attention that contextual amnesia is a critical etiologic factor for PTSD, there is no treatment currently available that can reverse contextual amnesia, and whether such treatment can prevent the development of PTSD is unknown. Read More

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Multi-ancestry genome-wide gene-sleep interactions identify novel loci for blood pressure.

Mol Psychiatry 2021 Apr 15. Epub 2021 Apr 15.

Department of Epidemiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.

Long and short sleep duration are associated with elevated blood pressure (BP), possibly through effects on molecular pathways that influence neuroendocrine and vascular systems. To gain new insights into the genetic basis of sleep-related BP variation, we performed genome-wide gene by short or long sleep duration interaction analyses on four BP traits (systolic BP, diastolic BP, mean arterial pressure, and pulse pressure) across five ancestry groups in two stages using 2 degree of freedom (df) joint test followed by 1df test of interaction effects. Primary multi-ancestry analysis in 62,969 individuals in stage 1 identified three novel gene by sleep interactions that were replicated in an additional 59,296 individuals in stage 2 (stage 1 + 2 P < 5 × 10), including rs7955964 (FIGNL2/ANKRD33) that increases BP among long sleepers, and rs73493041 (SNORA26/C9orf170) and rs10406644 (KCTD15/LSM14A) that increase BP among short sleepers (P < 5 × 10). Read More

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Increased MMP-9 levels with strain-dependent stress resilience and tunnel handling in mice.

Behav Brain Res 2021 Jun 6;408:113288. Epub 2021 Apr 6.

Georgetown University Medical Center, Department of Neuroscience, Washington D.C., United States. Electronic address:

Increased perineuronal net (PNN) deposition has been observed in association with corticosteroid administration and stress in rodent models of depression. PNNs are a specialized form of extracellular matrix (ECM) that may enhance GABA-mediated inhibitory neurotransmission to potentially restrict the excitation and plasticity of pyramidal glutamatergic neurons. In contrast, antidepressant administration increases levels of the PNN-degrading enzyme matrix metalloproteinase-9 (MMP-9), which enhances glutamatergic plasticity and neurotransmission. Read More

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Altered acoustic startle, prepulse facilitation, and object recognition memory produced by corticosterone withdrawal in male rats.

Behav Brain Res 2021 Jun 6;408:113291. Epub 2021 Apr 6.

Division of Medical Sciences, University of Victoria, Victoria, BC, V8W 2Y2, Canada.

The symptoms of human depression often include cognitive deficits. However, cognition is not frequently included in the behavioral assessments conducted in preclinical models of depression. For example, it is well known that repeated corticosterone (CORT) injections in rodents produce depression-like behavior as measured by the forced swim test, sucrose preference test, and tail suspension test, but the cognitive impairments produced by repeated CORT have not been thoroughly examined. Read More

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Identification of loss-of-function RyR2 mutations associated with idiopathic ventricular fibrillation and sudden death.

Biosci Rep 2021 Apr;41(4)

The Libin Cardiovascular Institute, Department of Physiology and Pharmacology, University of Calgary, Calgary, AB, Canada.

Mutations in cardiac ryanodine receptor (RyR2) are linked to catecholaminergic polymorphic ventricular tachycardia (CPVT). Most CPVT RyR2 mutations characterized are gain-of-function (GOF), indicating enhanced RyR2 function as a major cause of CPVT. Loss-of-function (LOF) RyR2 mutations have also been identified and are linked to a distinct entity of cardiac arrhythmia termed RyR2 Ca2+ release deficiency syndrome (CRDS). Read More

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Effects of Chronic Supplementation of L-Arginine on Physical Fitness in Water Polo Players.

Oxid Med Cell Longev 2021 15;2021:6684568. Epub 2021 Mar 15.

Department of Advanced Biomedical Sciences, Federico II University of Naples, Italy.

Background: Ergogenic nutritional supplementation is sought by professional athletes for improving physical performance; nevertheless, scientific evidence to support the chronic use of L-Arginine among water polo players is missing.

Methods: Seventeen male professional water polo players were randomly assigned to assume 5 grams per day of L-Arginine ( = 9) or placebo ( = 8) for 4 weeks. The players' fitness level was assessed in the maximal speed swimming test. Read More

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Nutrition and Exercise in a Case of Carnitine Palmitoyl-Transferase II Deficiency.

Front Physiol 2021 17;12:637406. Epub 2021 Mar 17.

Criams-Sport Medicine Centre Voghera, University of Pavia, Pavia, Italy.

In the mild subtype of inherited carnitine palmitoyltransferase II (CPTII) deficiency, muscular mitochondrial fatty acid β-oxidation is impaired. In this condition, interventions involve daily dietary restriction of fats and increase of carbohydrates, whereas physical exercise is commonly contraindicated due to the risk of muscle pain and rhabdomyolysis. We present the case of a 14-year-old female with CPTII deficiency who underwent a 1-h session of unsupervised exercise training for 6 months, 3 days per week, including interval and resistance exercises, after diet assessment and correction. Read More

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Cumulative Effects of Strontium Ranelate and Impact Exercise on Bone Mass in Ovariectomized Rats.

Int J Mol Sci 2021 Mar 16;22(6). Epub 2021 Mar 16.

I3MTO, Université d'Orléans, 45000 Orléans, France.

Objective: To explore the effect of physical exercise (EXE), strontium ranelate (SR), or their combination on bone status in ovariectomized (OVX) rats.

Design: Sixty female Wistar rats were randomized to one of five groups: sham (Sh), OVX (O), OVX+EXE (OE), OVX+SR (OSR), and OVX+EXE+SR (OESR). Animals in EXE groups were subjected to 10 drops per day (45 cm in height); rats in SR groups received 625 mg/kg/day of SR, 5 days/week for 8 weeks. Read More

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Could Small Heat Shock Protein HSP27 Be a First-Line Target for Preventing Protein Aggregation in Parkinson's Disease?

Int J Mol Sci 2021 Mar 16;22(6). Epub 2021 Mar 16.

Institute of Biomedical Research of Murcia (IMIB), Campus de Ciencias de la Salud, 30120 Murcia, Spain.

Small heat shock proteins (HSPs), such as HSP27, are ubiquitously expressed molecular chaperones and are essential for cellular homeostasis. The major functions of HSP27 include chaperoning misfolded or unfolded polypeptides and protecting cells from toxic stress. Dysregulation of stress proteins is associated with many human diseases including neurodegenerative diseases, such as Parkinson's disease (PD). Read More

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Increased Stress Resistance and Lifespan in Wildtype and Knockout Mutants-Implications for Depression Treatment by Medicinal Herbs.

Molecules 2021 Mar 24;26(7). Epub 2021 Mar 24.

Department of Pharmaceutical Biology, Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University, Staudinger Weg 5, 55128 Mainz, Germany.

Depression and anxiety disorders are widespread diseases, and they belong to the leading causes of disability and greatest burdens on healthcare systems worldwide. It is expected that the numbers will dramatically rise during the COVID-19 pandemic. Established medications are not sufficient to adequately treat depression and are not available for everyone. Read More

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Glucocorticoid Receptor Antagonist Mifepristone Does Not Alter Innate Anxiety-Like Behavior in Genetically-Selected Marchigian Sardinian (msP) Rats.

Int J Mol Sci 2021 Mar 18;22(6). Epub 2021 Mar 18.

Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA.

Marchigian Sardinian alcohol-preferring (msP) rats serve as a unique model of heightened alcohol preference and anxiety disorders. Their innate enhanced stress and poor stress-coping strategies are driven by a genetic polymorphism of the corticotropin-releasing factor receptor 1 () in brain areas involved in glucocorticoid signaling. The activation of glucocorticoid receptors (GRs) regulates the stress response, making GRs a candidate target to treat stress and anxiety. Read More

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Pro-Oxidant/Antioxidant Balance during a Prolonged Exposure to Moderate Altitude in Athletes Exhibiting Exercise-Induced Hypoxemia at Sea-Level.

Life (Basel) 2021 Mar 11;11(3). Epub 2021 Mar 11.

Laboratoire Européen Performance Santé Altitude (LEPSA), EA 4604, Université de Perpignan Via Domitia, 66120 Font Romeu, France.

This study examined to what extent athletes exhibiting exercise-induced hypoxemia (EIH) possess an altered redox status at rest, in response to exercise at sea level (SL) and during moderate altitude exposure. EIH was defined as a fall in arterial O saturation of at least 4% during exercise. Nine endurance athletes with EIH and ten without (NEIH) performed a maximal incremental test under three conditions: SL, one (H1) and five (H2) days after arrival to 2400 m. Read More

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Sotatercept for the Treatment of Pulmonary Arterial Hypertension.

N Engl J Med 2021 04;384(13):1204-1215

From the Department of Respiratory and Intensive Care Medicine, Hôpital Bicêtre, Assistance Publique-Hôpitaux de Paris, INSERM Unité Mixte de Recherche 999, Université Paris-Saclay, Le Kremlin-Bicêtre, France (M.H., D.M.); the Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan Health System, Ann Arbor (V.M.); the National Heart and Lung Institute, Imperial College London, and the National Pulmonary Hypertension Service, Hammersmith Hospital, Imperial College Healthcare NHS Trust, London (J.S.R.G.); the Department of Medicine, George Washington University, Washington, DC (M.G.-M.); the Department of Respiratory Medicine, Hannover Medical School, and the German Center for Lung Research - both in Hannover, Germany (M.M.H., K.M.O.); the Division of Pulmonary, Critical Care and Sleep Medicine, Tufts Medical Center (I.R.P.), and the Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital (A.W.), Boston, and Acceleron Pharma, Cambridge (S.M., J.B., P.G.L., J.O.P.) - all in Massachusetts; the Pulmonary Division-Heart Institute, University of São Paulo Medical School, São Paulo (R.S.), and Complexo Hospitalar Santa Casa de Porto Alegre, Pulmonary Vascular Research Institute, Porto Alegre (G.M.) - both in Brazil; the Department of Cardiology, Centro de Investigación en Red en Enfermedades Cardiovasculares, Hospital Universitario 12 de Octubre, Universidad Complutense, Madrid (P.E.S.); Arizona Pulmonary Specialists, Phoenix (J.F.); and the Divisions of Pulmonary Sciences and Critical Care Medicine, and Cardiology, University of Colorado, Anschutz Medical Campus, Aurora (D.B.B.).

Background: Pulmonary arterial hypertension is characterized by pulmonary vascular remodeling, cellular proliferation, and poor long-term outcomes. Dysfunctional bone morphogenetic protein pathway signaling is associated with both hereditary and idiopathic subtypes. Sotatercept, a novel fusion protein, binds activins and growth differentiation factors in the attempt to restore balance between growth-promoting and growth-inhibiting signaling pathways. Read More

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RNA-sequencing and behavioral testing reveals inherited physical inactivity co-selects for anxiogenic behavior without altering depressive-like behavior in Wistar rats.

Neurosci Lett 2021 05 27;753:135854. Epub 2021 Mar 27.

Department of Biomedical Sciences, University of Missouri, Columbia, MO 65211, USA; Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO 65211, USA; Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, MO 65211, USA; Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO 65211, USA.

Physical inactivity is positively associated with anxiety and depression. Considering physical inactivity, anxiety, and depression each have a genetic basis for inheritance, our lab used artificial selectively bred low-voluntary running (LVR) and wild type (WT) female Wistar rats to test if physical inactivity genes selected over multiple generations would lead to an anxiety or depressive-like phenotype. We performed next generation RNA sequencing and immunoblotting on the dentate gyrus to reveal key biological functions from heritable physical inactivity. Read More

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An open-source device for measuring food intake and operant behavior in rodent home-cages.

Elife 2021 03 29;10. Epub 2021 Mar 29.

Department of Psychiatry, Washington University in St. Louis, St. Louis, United States.

Feeding is critical for survival, and disruption in the mechanisms that govern food intake underlies disorders such as obesity and anorexia nervosa. It is important to understand both food intake and food motivation to reveal mechanisms underlying feeding disorders. Operant behavioral testing can be used to measure the motivational component to feeding, but most food intake monitoring systems do not measure operant behavior. Read More

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