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https://www.readbyqxmd.com/read/28732009/effects-of-local-cardiac-denervation-on-cardiac-innervation-and-ventricular-arrhythmia-after-chronic-myocardial-infarction
#1
Xudong Liu, Lin Sun, Jugang Chen, Yingying Jin, Qing Liu, Zhongnan Xia, Liang Wang, Jingjie Li
BACKGROUND: Modulation of the autonomic nervous system (ANS) has already been demonstrated to display antiarrhythmic effects in patients and animals with MI. In this study, we investigated whether local cardiac denervation has any beneficial effects on ventricular electrical stability and cardiac function in the chronic phase of MI. METHODS: Twenty-one anesthetized dogs were randomly assigned into the sham-operated, MI and MI-ablation groups, respectively. Four weeks after local cardiac denervation, LSG stimulation was used to induce VPCs and VAs...
2017: PloS One
https://www.readbyqxmd.com/read/28727480/pilot-study-of-propranolol-premedication-to-reduce-fdg-uptake-in-brown-adipose-tissue-on-pet-scans-of-adolescent-and-young-adult-oncology-patients
#2
Anil George, Partha Sinha, Gary Conrad, Aum A Memon, Emily V Dressler, Lars M Wagner
OBJECTIVE: Physiologic uptake of (18)F-fluorodeoxyglucose (FDG) in brown adipose tissue (adipose tissue) of cancer patients may confound interpretation of positron emission tomography (PET) scans. Uptake in adipose tissue occurs in up to half of pediatric oncology patients undergoing PET scans, and is especially common in adolescents. adipose tissue is innervated by the sympathetic nervous system, and beta blockers such as propranolol have shown efficacy in reducing adipose tissue uptake on PET scans done in older adult oncology patients...
July 20, 2017: Pediatric Hematology and Oncology
https://www.readbyqxmd.com/read/28726661/-heart-rate-variability-in-children-with-false-chords-in-the-left-cardiac-ventricular
#3
A Kuleshov
We examined 64 children with false tendons in the left cardiac ventricular. The research included evaluation of time and frequency domain parameters of the heart rhythm with cardiointervalography. The parameter changes were noted. Thus, sympathetic vegetative system (VS) part prevalence was present in boys and characterized by decreasing of SDNN when compared with control data (85,4±5,8 и 158,2 ±25,6, р<0,05). rMSSD and PNN50%, which are responsible for parasympathetic VS part have the tendency to increasing in girls...
June 2017: Georgian Medical News
https://www.readbyqxmd.com/read/28725599/effects-of-metformin-on-endothelial-health-and-erectile-dysfunction
#4
REVIEW
Jay Pravin Patel, Eric Hweegeun Lee, Carlos Ignacio Mena, Charles N Walker
Erectile dysfunction (ED) affects approximately 18 million American men. ED may be attributed to several etiologies, including arteriogenic, psychogenic, neurogenic, hormonal, drug-induced, and systemic disease or aging related factors. Specific to arteriogenic ED, three major mechanisms have been identified: (I) endothelium-dependent vasodilatory impairment; (II) sympathetic nerve activity elevation; (III) atherosclerotic luminal narrowing. Additionally, these insults have been linked to the insulin resistant state, which in turn is comorbid with obesity, dyslipidemia, diabetes, and hypertension...
June 2017: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28724789/red-blood-cell-%C3%AE-adrenergic-receptors-contribute-to-diet-induced-energy-expenditure-by-increasing-o2-supply
#5
Eun Ran Kim, Shengjie Fan, Dmitry Akhmedov, Kaiqi Sun, Hoyong Lim, William O'Brien, Yuanzhong Xu, Leandra R Mangieri, Yaming Zhu, Cheng-Chi Lee, Yeonseok Chung, Yang Xia, Yong Xu, Feng Li, Kai Sun, Rebecca Berdeaux, Qingchun Tong
Diet-induced obesity (DIO) represents the major cause for the current obesity epidemic, but the mechanism underlying DIO is unclear. β-Adrenergic receptors (β-ARs) play a major role in sympathetic nervous system-mediated (SNS-mediated) diet-induced energy expenditure (EE). Rbc express abundant β-ARs; however, a potential role for rbc in DIO remains untested. Here, we demonstrated that high-fat, high-caloric diet (HFD) feeding increased both EE and blood O2 content, and the HFD-induced increases in blood O2 level and in body weight gain were negatively correlated...
July 20, 2017: JCI Insight
https://www.readbyqxmd.com/read/28720479/interaction-between-prenatal-risk-and-infant-parasympathetic-and-sympathetic-stress-reactivity-predicts-early-aggression
#6
J Suurland, K B Van der Heijden, S C J Huijbregts, S H M Van Goozen, H Swaab
Nonreciprocal action of the parasympathetic (PNS) and sympathetic (SNS) nervous systems, increases susceptibility to emotional and behavioral problems in children exposed to adversity. Little is known about the PNS and SNS in interaction with early adversity during infancy. Yet this is when the physiological systems involved in emotion regulation are emerging and presumably most responsive to environmental influences. We examined whether parasympathetic respiratory sinus arrhythmia (RSA) and sympathetic pre-ejection period (PEP) response and recovery at six months, moderate the association between cumulative prenatal risk and physical aggression at 20 months (N=113)...
July 15, 2017: Biological Psychology
https://www.readbyqxmd.com/read/28717053/pure-autonomic-failure
#7
REVIEW
Thomas P Brown
Pure autonomic failure is a degenerative disorder of the peripheral autonomic nervous system. Patients experience symptomatic hypotension that requires them to sit, squat or lie down to prevent syncope. It is associated with characteristic histopathological findings, resulting in neuronal cytoplasmic inclusions in the peripheral autonomic nerves. These lesions are responsible for defects in the synthesis and release of norepinephrine from sympathetic nerve terminals, resulting in significant hypotension. Patients with autonomic failure also have exaggerated blood pressure responses to common stimuli such as food or fluid intake, heat, exercise and medications...
July 17, 2017: Practical Neurology
https://www.readbyqxmd.com/read/28717028/the-norepinephrine-metabolite-3-4-dihydroxymandelic-acid-is-produced-by-the-commensal-microbiota-and-promotes-chemotaxis-and-virulence-gene-expression-in-enterohemorrhagic-escherichia-coli
#8
Nitesh Sule, Sasi Pasupuleti, Nandita Kohli, Rani Menon, Lawrence J Dangott, Michael D Manson, Arul Jayaraman
Enterohemorrhagic E. coli (EHEC) is a commonly occuring foodborne pathogen responsible for numerous multistate outbreaks in the US. It is known to infect the host gastrointestinal tract, specifically in locations associated with lymphoid tissue. These niches serve as sources of enteric neurotransmitters such as epinephrine and norepinephrine that are known to increase virulence in several pathogens, including enterohemorrhagic E. coli The mechanisms that allow pathogens to target these niches are poorly understood...
July 17, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28716800/relationship-between-vascular-resistance-and-sympathetic-nerve-fiber-density-in-arterial-vessels-in-children-with-sleep-disordered-breathing
#9
Anna Kontos, Kurt Lushington, James Martin, Quenten Schwarz, Ryan Green, David Wabnitz, Xiangjun Xu, Elke M Sokoya, Scott Willoughby, Mathias Baumert, Antonio Ferrante, Melissa La Forgia, Declan Kennedy
BACKGROUND: Sleep disordered breathing in children is associated with increased blood flow velocity and sympathetic overactivity. Sympathetic overactivity results in peripheral vasoconstriction and reduced systemic vascular compliance, which increases blood flow velocity during systole. Augmented blood flow velocity is recognized to promote vascular remodeling. Importantly, increased vascular sympathetic nerve fiber density and innervation in early life plays a key role in the development of early-onset hypertension in animal models...
July 17, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28715351/interacting-influences-of-gender-and-chronic-pain-status-on-parasympathetically-mediated-heart-rate-variability-in-adolescents-and-young-adults
#10
Lynn S Walker, Amanda L Stone, Craig A Smith, Stephen Bruehl, Judy Garber, Martina Puzanovova, André Diedrich
Considerable research links chronic pain to autonomic nervous system (ANS) dysfunction, specifically low heart rate variability (HRV) mediated by reduced parasympathetic activity. However, little is known about factors that influence ANS function in chronic pain. The ANS is the primary pathway for brain-gut communication, making it of particular interest in gastrointestinal disorders, such as irritable bowel syndrome, characterized by functional abdominal pain (FAP). We evaluated the relation of sex, pain severity, and psychological stress to ANS function in adolescents/young adults from a database of pediatric FAP and control participants enrolled 8 years earlier in a prospective study of pain...
August 2017: Pain
https://www.readbyqxmd.com/read/28714862/a-leptin-regulated-circuit-controls-glucose-mobilization-during-noxious-stimuli
#11
Jonathan N Flak, Deanna Arble, Warren Pan, Christa Patterson, Thomas Lanigan, Paulette B Goforth, Jamie Sacksner, Maja Joosten, Donald A Morgan, Margaret B Allison, John Hayes, Eva Feldman, Randy J Seeley, David P Olson, Kamal Rahmouni, Martin G Myers
Adipocytes secrete the hormone leptin to signal the sufficiency of energy stores. Reductions in circulating leptin concentrations reflect a negative energy balance, which augments sympathetic nervous system (SNS) activation in response to metabolically demanding emergencies. This process ensures adequate glucose mobilization despite low energy stores. We report that leptin receptor-expressing neurons (LepRb neurons) in the periaqueductal gray (PAG), the largest population of LepRb neurons in the brain stem, mediate this process...
July 17, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28714262/baroreflex-mediated-sympathetic-overactivation-induced-by-mental-stress-in-post-traumatic-stress-disorder-depends-on-the-type-of-stressor
#12
Luiz Eduardo Virgilio Silva, Pedro Lourenço Katayama
Sympathetic overactivation has long been recognized as a deleterious condition, involved in the physiopathology of several diseases. The overactivity of sympathetic nervous system (SNS) may be the consequence of different conditions and an intriguing question that still remains is whether diseases, such as hypertension and heart failure, are induced by increased SNS or increased SNS is a consequence of the disease progression. This article is protected by copyright. All rights reserved.
July 17, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28714085/neural-control-of-sweat-secretion-a-review
#13
REVIEW
Y Hu, C Converse, M C Lyons, W H Hsu
Humans have 4 million exocrine sweat glands, which can be classified into two types: eccrine and apocrine glands. Sweat secretion is a constitutive feature, which is directly involved in thermoregulation and metabolism. Sweat secretion is regulated by both the central nervous system(1) and autonomic nervous system.(2) In peripheral areas, the ANS, especially the sympathetic nervous system (SNS), mediates the transmission of neurotransmitters to sweat glands. Two principal chemical mediators, acetylcholine and noradrenaline (NA)/adrenaline (ADR), are released by the SNS, which stimulate sweat secretion...
July 17, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28713844/epidemiology-diagnosis-and-management-of-neurogenic-orthostatic-hypotension
#14
Jose-Alberto Palma, Horacio Kaufmann
BACKGROUND: Orthostatic hypotension (OH) is a sustained fall in blood pressure on standing which can cause symptoms of organ hypoperfusion. OH is associated with increased morbidity and mortality and leads to a significant number of hospital admissions particularly in the elderly (233 per 100,000 patients over 75 years of age in the US). OH can be due to volume depletion, blood loss, large varicose veins, medications, or due to defective activation of sympathetic nerves and reduced norepinephrine release upon standing (i...
May 2017: Movement Disorders Clinical Practice
https://www.readbyqxmd.com/read/28713263/the-frequency-dependent-aerobic-exercise-effects-of-hypothalamic-gabaergic-expression-and-cardiovascular-functions-in-aged-rats
#15
Yan Li, Ziqi Zhao, Jiajia Cai, Boya Gu, Yuanyuan Lv, Li Zhao
A decline in cardiovascular modulation is a feature of the normal aging process and associated with cardiovascular diseases (CVDs) such as hypertension and stroke. Exercise training is known to promote cardiovascular adaptation in young animals and positive effects on motor and cognitive capabilities, as well as on brain plasticity for all ages in mice. Here, we examine the question of whether aerobic exercise interventions may impact the GABAergic neurons of the paraventricular nucleus (PVN) in aged rats which have been observed to have a decline in cardiovascular integration function...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28713088/-pathogenic-factors-of-regulatory-mechanisms-of-organism-adaptation-to-conditions-with-a-high-level-of-psychoemotional-load
#16
Oksana V Gorsha, Vasily I Gorsha
INTRODUCTION: The urgency of the issue is determined by the value of the stress impact of environmental conditions on workers of the operator personnel contingent, because the deterioration of their health and well-being is a factor in dangerous situations. However, the search for early diagnostic markers forming diseases, with a view to their prevention, is still a challenge. The aim was to establish the most important (among studied) pathogenetic factors of status of regulatory mechanisms of adaptation of individuals with a high level of psychoemotional load that is conditional upon profession...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28712414/anxiety-during-pregnancy-and-autonomic-nervous-system-activity-a-longitudinal-observational-and-cross-sectional-study
#17
Taeko Mizuno, Koji Tamakoshi, Keiko Tanabe
OBJECTIVES: To assess the longitudinal change in autonomic nervous system (ANS) activity during pregnancy and the association between anxiety during pregnancy and ANS activity. METHODS: Pregnant Japanese women with a singleton fetus and normal pregnancy were recruited (n=65). ANS activity and anxiety were measured using a self-rating questionnaire at approximately 20, 30, and 36weeks of gestation. Very low (VLF) and high (HF) frequency bands of heart rate variability spectrums were used...
August 2017: Journal of Psychosomatic Research
https://www.readbyqxmd.com/read/28712386/neuropeptide-y-improves-cisplatin-induced-bone-marrow-dysfunction-without-blocking-chemotherapeutic-efficacy-in-a-cancer-mouse-model
#18
Min Hee Park, In Kyung Jung, Woo-Kie Min, Jin Ho Choi, Gyu Man Kim, Hee Kyung Jin, Jae-Sung Bae
Cisplatin is the most effective and widely used chemotherapeutic agent for many types of cancer. Unfortunately, its clinical use is limited by its adverse effects, notably bone marrow suppression leading to abnormal hematopoiesis. We previously revealed that neuropeptide Y (NPY) is responsible for the maintenance of hematopoietic stem cell (HSC) function by protecting the sympathetic nervous system (SNS) fibers survival from chemotherapy-induced bone marrow impairment. Here, we show the NPY-mediated protective effect against bone marrow dysfunction due to cisplatin in an ovarian cancer mouse model...
July 17, 2017: BMB Reports
https://www.readbyqxmd.com/read/28711699/lower-catecholamine-activity-is-associated-with-greater-levels-of-anger-in-adults
#19
Joseph A Schwartz, Jill Portnoy
Previous research has revealed a consistent association between heart rate at rest and during stress and behavioral problems, potentially implicating autonomic nervous system (ANS) functioning in the etiological development of antisocial behavior. A complementary line of research has focused on the potential independent and interactive role of the two subsystems that comprise the ANS, the parasympathetic nervous system (PNS) and the sympathetic nervous system (SNS), on behavioral problems. The current study aims to contribute to the existing literature by examining the influence of heart rate (HR) reactivity, high-frequency heart rate variability (HF-HRV) reactivity, and catecholamine activity on a comprehensive measure of anger in a large, nationally-representative sample of adults from the United States...
July 12, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28711635/a-new-pupillary-measure-to-assess-pain-a-prospective-study
#20
David J Charier, Daniel Zantour, Vincent Pichot, Florian Chouchou, Jean-Claude M Barthelemy, Frederic Roche, Serge B Molliex
Pupillary diameter (PD) varies under the influence of both the sympathetic and parasympathetic systems, increasing proportionally to pain intensity. Such variations however should not be confused with pupillary fluctuations, which refer to the fast and permanent PD fluctuations induced by the ongoing interplay between the sympathetic and parasympathetic systems, which we propose to measure using the Variation Coefficient of Pupillary Diameter (VCPD). This study aimed first at correlating both PD, PD increase during a contraction, and VCPD, with pain as rated with the Numerical Rating Scale (NRS) during obstetrical labor, and then at comparing such correlations with one another...
July 12, 2017: Journal of Pain: Official Journal of the American Pain Society
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