keyword
MENU ▼
Read by QxMD icon Read
search

sympathetic nerve

keyword
https://www.readbyqxmd.com/read/28350577/reliability-of-heart-rate-as-neuroadrenergic-marker-in-the-metabolic-syndrome
#1
Fosca Quarti Trevano, Gino Seravalle, Mario Macchiarulo, Paolo Villa, Carlo Valena, Raffaella Dell'Oro, Giuseppe Mancia, Guido Grassi
BACKGROUND: Metabolic syndrome is characterized by a pronounced sympathetic overactivity as documented by the marked increase in muscle sympathetic nerve traffic (MSNA) as well as in plasma norepinephrine values reported in this condition. Whether and to what extent heart rate (HR) reflects the abovementioned adrenergic alterations in metabolic syndrome remains largely undefined. It is also undefined the validity of the abovementioned adrenergic markers in reflecting the main features of the metabolic syndrome...
March 27, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28344733/an-acute-bout-of-a-controlled-breathing-frequency-lowers-sympathetic-neural-outflow-but-not-blood-pressure-in-healthy-normotensive-subjects
#2
Shannon L McClain, Alexa M Brooks, Sara S Jarvis
Controlled or paced breathing is often used as a stress reduction technique but the impact on blood pressure (BP) and sympathetic outflow have not been consistently reported. The purpose of this study was to determine whether a controlled breathing (12 breaths/min, CB) rate would be similar to an individual's spontaneous breathing (SB) rate. Secondly, would a CB rate of 12 breaths/min alter heart rate (HR), BP, and indices of muscle sympathetic nerve activity (MSNA). Twenty-one subjects (10 women, 11 men) performed two trials: SB, where the subject chose a comfortable breathing rate; and CB, where the subject breathed at a pace of 12 breaths/min...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28338871/renal-sympathetic-denervation-a-viable-option-for-treating-resistant-hypertension
#3
Markus P Schlaich
Accumulating evidence from mainly uncontrolled clinical studies with various types of ablation catheters have shown that renal denervation (RDN) can be applied safely and is effective in lowering blood pressure (BP) in patients with treatment-resistant hypertension. Sustained BP lowering has been documented up to 3 years. Furthermore, RDN has been associated with regression of target organ damage, such as left ventricular hypertrophy, arterial stiffness, and others. Several studies indicate potential benefit in other common clinical conditions associated with increased sympathetic tone including chronic kidney disease and heart failure...
March 1, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28338768/integrative-blood-pressure-response-to-upright-tilt-post-renal-denervation
#4
Erin J Howden, Cara East, Justin S Lawley, Abigail S L Stickford, Myrthe Verhees, Qi Fu, Benjamin D Levine
BACKGROUND: Whether renal denervation (RDN) in patients with resistant hypertension normalizes blood pressure (BP) regulation in response to routine cardiovascular stimuli such as upright posture is unknown. We conducted an integrative study of BP regulation in patients with resistant hypertension who had received RDN to characterize autonomic circulatory control. METHODS: Twelve patients (60 ± 9 [SD] years, n = 10 males) who participated in the Symplicity HTN-3 trial were studied and compared to 2 age-matched normotensive (Norm) and hypertensive (unmedicated, HTN) control groups...
February 20, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28336370/purinergic-p2y6-receptors-a-new-therapeutic-target-of-age-dependent-hypertension
#5
REVIEW
Caroline Sunggip, Akiyuki Nishimura, Kakeru Shimoda, Takuro Numaga-Tomita, Makoto Tsuda, Motohiro Nishida
Aging has a remarkable effect on cardiovascular homeostasis and it is known as the major non-modifiable risk factor in the development of hypertension. Medications targeting sympathetic nerve system and/or renin-angiotensin-aldosterone system are widely accepted as a powerful therapeutic strategy to improve hypertension, although the control rates remain unsatisfactory especially in the elder patients with hypertension. Purinergic receptors, activated by adenine, uridine nucleotides and nucleotide sugars, play pivotal roles in many biological processes, including platelet aggregation, neurotransmission and hormone release, and regulation of cardiovascular contractility...
March 20, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28333375/renal-nerves-and-long-term-control-of-arterial-pressure
#6
John W Osborn, Jason D Foss
The objective of this review is to provide an in-depth evaluation of how renal nerves regulate renal and cardiovascular function with a focus on long-term control of arterial pressure. We begin by reviewing the anatomy of renal nerves and then briefly discuss how the activity of renal nerves affects renal function. Current methods for measurement and quantification of efferent renal-nerve activity (ERNA) in animals and humans are discussed. Acute regulation of ERNA by classical neural reflexes as well and hormonal inputs to the brain is reviewed...
March 16, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28330967/muscle-sympathetic-nerve-activity-response-to-heat-stress-is-attenuated-in-chronic-heart-failure-patients
#7
Jian Cui, John Boehmer, Cheryl A Blaha, Lawrence I Sinoway
Heat stress evokes significant increases in muscle sympathetic nerve activity (MSNA) in healthy individuals. The MSNA response to heat stress in chronic heart failure (CHF) is unknown. We hypothesized that the MSNA response to heat stress is attenuated in CHF. Passive whole body heating was applied with water-perfused suits on 13 patients (61 ± 2 years) with stable class II-III CHF, 12 age-matched (62 ± 2 years) healthy subjects, and 14 young (24 ± 1 years) healthy subjects. Mild heating (i.e. increases in skin temperature ΔTsk ~2-4 °C, internal temperature ΔTcore <0...
March 22, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28328124/exome-sequencing-identifies-novel-ntrk1-mutations-in-patients-with-hsan-iv-phenotype
#8
Ruqaiah Altassan, Haya Al Saud, Tariq Ahmad Masoodi, Haya Al Dosssari, Ola Khalifa, Hamad Al-Zaidan, Nadia Sakati, Zuhair Rhabeeni, Zuhair Al-Hassnan, Yousef Binamer, Nadia Alhashemi, William Wade, Zayed Al-Zayed, Moeen Al-Sayed, Mohamed A Al-Muhaizea, Brian Meyer, Mohammad Al-Owain, Salma M Wakil
Hereditary sensory autonomic neuropathy type IV (HSAN-IV) is a rare autosomal recessive disorder that usually begins in infancy and is characterized by anhidrosis, insensitivity to noxious stimuli leading to self-mutilating behavior, and intellectual disability. HSAN-IV is caused by mutations in the neurotrophic tyrosine kinase receptor type 1 gene, NTRK1, encoding the high-affinity receptor of nerve growth factor (NGF) which maps to chromosome 1q21-q22. Patients with HSAN-IV lack all NGF-dependent neurons, the primary afferents and sympathetic postganglionic neurons leading to lack of pain sensation and the presence of anhidrosis, respectively...
April 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28324630/morphological-and-neurochemical-differences-in-peptidergic-nerve-fibres-of-the-mouse-vagina
#9
Christine Barry, Esther Ji, Harman Sharma, Lara Beukes, Pat Vilimas, Yvette DeGraaf, Dusan Matusica, Rainer V Haberberger
The vagina is innervated by a complex arrangement of sensory, sympathetic and parasympathetic nerve fibres that contain classical transmitters plus an array of neuropeptides and enzymes known to regulate diverse processes including blood flow and nociception. The neurochemical characteristics and distributions of peptide-containing nerves in the mouse vagina are unknown. This study used multiple labelling immunohistochemistry, confocal imaging and analysis to investigate the presence and colocalization of the peptides vasoactive intestinal polypeptide (VIP), calcitonin-gene related peptide (CGRP), substance P (SP), neuropeptide tyrosine (NPY) and the nitric oxide synthesizing enzyme neuronal nitric oxide synthase (nNOS) in nerve fibres of the murine vaginal wall...
March 21, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28323975/muscle-sympathetic-nerve-activity-is-associated-with-elements-of-the-plasma-lipidomic-profile-in-young-asian-adults
#10
Nina Eikelis, Elisabeth A Lambert, Sarah Phillips, Carolina Ika Sari, Piyushkumar A Mundra, Jacquelyn M Weir, Kevin Huynh, Mariee T Grima, Nora E Straznicky, John B Dixon, Markus P Schlaich, Peter J Meikle, Gavin W Lambert
Background: Asian subjects are at increased cardio-metabolic risk at comparatively lower BMI compared with Caucasians. Sympathetic nervous system activation and dyslipidaemia, both characteristics of increased adiposity, appear to be related. We therefore analysed the association of muscle sympathetic nerve activity (MSNA) with the plasma lipidomic profile in young Asian and Caucasian subjects. Methods: Blood samples were collected from 101 participants of either Asian or Caucasian background, aged 18-30, BMI 28...
March 15, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28323007/intrathecal-application-of-the-microglial-inhibitor-minocycline-attenuates-sympathoexcitatory-and-proarrhythmogenic-changes-in-rats-with-chronic-temporal-lobe-epilepsy
#11
Amol M Bhandare, Komal Kapoor, Kim L Powell, Emma Braine, Pablo Casillas-Espinosa, Terence J O'Brien, Melissa M J Farnham, Paul M Pilowsky
The incidence of sudden unexpected death in epilepsy (SUDEP) is highest in people with chronic and drug-resistant epilepsy. Chronic spontaneous recurrent seizures cause cardiorespiratory autonomic dysfunctions. Pituitary adenylate cyclase-activating polypeptide (PACAP) is neuroprotective, whereas microglia produce both pro- and anti-inflammatory effects in the CNS. During acute seizures in rats, PACAP and microglia produce sympathoprotective effect at the intermediolateral cell column (IML), whereas their action on the presympathetic rostral ventrolateral medulla (RVLM) neurons mediates proarrhythmogenic changes...
March 18, 2017: Neuroscience
https://www.readbyqxmd.com/read/28322043/-18-f-fluoro-hydroxyphenethylguanidines-efficient-synthesis-and-comparison-of-two-structural-isomers-as-radiotracers-of-cardiac-sympathetic-innervation
#12
Yong-Woon Jung, Keun Sam Jang, Guie Gu, Robert A Koeppe, Phillip S Sherman, Carole A Quesada, David M Raffel
Fluorine-18 labeled phenethylguanidines are currently under development in our laboratory as radiotracers for quantifying regional cardiac sympathetic nerve density using PET imaging techniques. In this study, we report an efficient synthesis of (18)F-hydroxyphenethylguanidines consisting of nucleophilic aromatic [(18)F]fluorination of a protected diaryliodonium salt precursor followed by a single deprotection step to afford the desired radiolabeled compound. This approach has been shown to reliably produce 4-[(18)F]fluoro-m-hydroxyphenethylguanidine ([(18)F]4F-MHPG, [(18)F]1) and its structural isomer 3-[(18)F]fluoro-p-hydroxyphenethylguanidine ([(18)F]3F-PHPG, [(18)F]2) with good radiochemical yields...
March 27, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28315122/cardio-oncology-the-nuclear-option
#13
REVIEW
Jorge A Alvarez, Raymond R Russell
PURPOSE OF REVIEW: Cardio-oncology focuses increased effort to decrease cancer treatment-related cardiotoxicity while continuing to improve outcomes. We sought to synthesize the latest in nuclear cardiology as it pertains to the assessment of left ventricular function in preventative guidelines and comparison to other modalities, novel molecular markers of pre-clinical cardiotoxicity, and its role in cardiac amyloid diagnosis. RECENT FINDINGS: Planar ERNA (equilibrium radionuclide angiocardiography) provides a reliable and proven means of monitoring and preventing anthracycline cardiotoxicity, and SPECT ERNA using solid-state gamma cameras may provide reproducible assessments of left ventricular function with reduced radiation exposure...
April 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28315049/antihypertensive-effects-of-probiotics
#14
REVIEW
Iñaki Robles-Vera, Marta Toral, Miguel Romero, Rosario Jiménez, Manuel Sánchez, Francisco Pérez-Vizcaíno, Juan Duarte
PURPOSE OF REVIEW: The present review focuses in the hypertension-associated changes in the microbiota and the current insights regarding the impact of probiotics on blood pressure in animal models and in human hypertensive patients. RECENT FINDINGS: Gut dysbiosis in hypertension is characterized by (i) the gut microbioma that is less diverse and less rich with an increased Firmicutes/Bacteroidetes ratio and (ii) a decrease in acetate- and butyrate-producing bacteria and an increase in lactate-producing bacterial populations...
April 2017: Current Hypertension Reports
https://www.readbyqxmd.com/read/28314642/hypotensive-effects-of-renal-denervation-in-spontaneously-hypertensive-rat-based-on-ultrasonic-contrast-imaging
#15
Ke Li, Jinwen Tian, Yuxiao Zhang, Qiao Xue, Caiyi Lu
BACKGROUND: Sympathetic nerves-fire rate is generally enhanced in some types of hypertension models. Renal sympathetic denervation(RSD) by the radiofrequency ablation was used to treat the hypertension has achieved curative effect.HTN-1 and HTN-2 trial reported catheter-based renal denervation may cause substantial and sustained blood-pressure reduction in patients with resistant hypertension. However, recent controlled HTN-3 trial questioned the BP lowering effect of Renal denervation treatment...
February 9, 2017: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://www.readbyqxmd.com/read/28301919/clostridium-difficile-toxin-a-induces-reactive-oxygen-species-production-and-p38mapk-activation-to-exert-cellular-toxicity-in-neuronal-cells
#16
Peng Zhang, Ji Hong, I Na Yoon, Jin Ku Kang, Jae Sam Hwang, Ho Kim
Clostridium difficile releases two exotoxins, toxin A and toxin B, which disrupt the epithelial cell barrier in the gut to increase mucosal permeability and trigger inflammation with severe diarrhea. Many studies have suggested that enteric nerves are also directly involved in the progression of this toxin-mediated inflammation and diarrhea. C. difficile toxin A is known to enhance neurotransmitter secretion, increase gut motility, and suppress sympathetic neurotransmission in the guinea pig colitis model. Although previous studies have examined the pathophysiological role of enteric nerves in gut inflammation, the direct effect of toxins on neuronal cells and the molecular mechanisms underlying toxin-induced neuronal stress remained to be unveiled...
March 17, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28300321/skeletal-colonization-by-breast-cancer-cells-is-stimulated-by-an-osteoblast-and-%C3%AE-2ar-dependent-neo-angiogenic-switch
#17
Patrick L Mulcrone, J Preston Campbell, Lise Clément-Demange, Ana Lia Anbinder, Alyssa R Merkel, Rolf A Brekken, Julie A Sterling, Florent Elefteriou
The skeleton is a common site for breast cancer metastasis. Although significant progress has been made to manage osteolytic bone lesions, the mechanisms driving the early steps of the bone metastatic process are still not sufficiently understood to design efficacious strategies needed to inhibit this process and offer preventative therapeutic options. Progression and recurrence of breast cancer, as well as reduced survival of patients with breast cancer, are associated with chronic stress, a condition known to stimulate sympathetic nerve outflow...
March 16, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28299616/promise-of-sglt2-inhibitors-in-heart-failure-diabetes-and-beyond
#18
REVIEW
Pieter Martens, Chantal Mathieu, Frederik H Verbrugge
This review provides mechanistic insight in the pleiotropic effects of sodium-glucose transporter-2 (SGLT-2) inhibitors with particular interest to the pathophysiology of heart failure. The SGLT-2 inhibitor empagliflozin has recently demonstrated an unprecedented 38% reduction in cardiovascular mortality in patients with diabetes. Despite modest effects on long-term glycemic control, highly significant reductions in heart failure admissions and end-stage kidney disease were observed. SGLT-2 inhibitors are the latest approved class of glucose-lowering agents...
March 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28293196/muscle-sympathetic-nerve-activity-is-associated-with-liver-insulin-sensitivity-in-obese-non-diabetic-men
#19
Daniel L T Chen, Rachael Brown, Carsten Liess, Anne Poljak, Aimin Xu, Jialiang Zhang, Michael Trenell, Arthur Jenkins, Donald Chisholm, Dorit Samocha-Bonet, Vaughan G Macefield, Jerry R Greenfield
Introduction: Muscle sympathetic nerve activity (MSNA) may play a role in insulin resistance in obesity. However, the direction and nature of the relationship between MSNA and insulin resistance in obesity remain unclear. We hypothesized that resting MSNA would correlate inversely with both muscle and liver insulin sensitivity and that it would be higher in insulin-resistant vs. insulin-sensitive subjects. Materials and methods: Forty-five non-diabetic obese subjects were studied. As no significant relationships were found in women, the data presented in on 22 men aged 48 ± 12 years...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28292315/anatomical-organization-and-neural-pathways-of-the-ovarian-plexus-nerve-in-rats
#20
César F Pastelín, Nora H Rosas, Leticia Morales-Ledesma, Rosa Linares, Roberto Domínguez, Carolina Morán
BACKGROUND: In this work, a detailed anatomical description of the ovarian plexus nerve (OPN) in rats is presented. The distribution of the OPN was analyzed by gross anatomy; the features of the superior mesenteric ganglion (SMG) were determined by histological studies; and the localization of the postganglionic neurons innervating the ovary were identified with retrograde tracer. We studied 19 adult cyclic rats of the CIIZ-V strain. RESULTS: We found that the right OPN originates from the celiac ganglion, the lumbar ganglion of the sympathetic trunk (LGST) and the SMG...
March 14, 2017: Journal of Ovarian Research
keyword
keyword
41468
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"