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https://www.readbyqxmd.com/read/28429515/a-device-to-measure-secretion-of-individual-sweat-glands-for-diagnosis-of-peripheral-neuropathy
#1
Adam J Loavenbruck, James S Hodges, Vincenzo Provitera, Maria Nolano, Gwen Wendelshafer-Crabb, William R Kennedy
INTRODUCTION: There is a need for quantitative, precise assessment of small fiber peripheral nerve function. We tested a customized camera device and protocol designed to quantify secretions of individual sweat glands (SGs). MATERIALS AND METHODS: Testing was performed on 178 healthy controls and 20 neuropathy subjects. Sweating was stimulated on a 2.25 cm(2) skin area by iontophoresis of pilocarpine. The camera imaged sweat from 50-400 sweat ducts. We calculated secretion rate of individual SGs, total sweat volume, and number of secreting SGs at four body sites...
April 21, 2017: Journal of the Peripheral Nervous System: JPNS
https://www.readbyqxmd.com/read/28421715/effect-of-water-bath-temperature-on-physiological-parameters-and-subjective-sensation-in-older-people
#2
Junji Ono, Nobuko Hashiguchi, Hiroyuki Sawatari, Tomoko Ohkusa, Mami Miyazono, Su-Young Son, Chie Magota, Yutaka Tochihara, Akiko Chishaki
AIM: In Japan, the incidence of water bathing-related cardiopulmonary accidents among older people is high in winter. The purpose of the present study was to investigate alterations in physiological characteristics and subjective thermal sensations of older people when bathing in a cool environment. METHODS: We assessed the skin temperature, rectal temperature, blood pressure, pulse rate, body fluid loss (sweat and urine), and subjective thermal responses of 11 older healthy male and 10 young male volunteers throughout 42°C and 39°C bathing in a room at 20°C with 50% humidity...
April 19, 2017: Geriatrics & Gerontology International
https://www.readbyqxmd.com/read/28419121/the-magnitude-of-ivacaftor-effects-on-fluid-secretion-via-r117h-cftr-channels-human-in-vivo-measurements
#3
Jessica E Char, Colleen Dunn, Zoe Davies, Carlos Milla, Richard B Moss, Jeffrey J Wine
We optically measured effects of orally available ivacaftor (Kalydeco®) on sweat rates of identified glands in 3 R117H subjects, each having a unique set of additional mutations, and compared them with 5 healthy control subjects tested contemporaneously. We injected β-adrenergic agonists intradermally to stimulate CFTR-dependent 'C-sweat' and methacholine to stimulate 'M-sweat', which persists in CF subjects. We focused on an R117H-7T/F508del subject who produced quantifiable C-sweat off ivacaftor and was available for 1 blinded, 3 off ivacaftor, and 3 on ivacaftor tests, allowing us to estimate in vivo fold-increase in sweat rates produced by ivacaftor's effect on the open probability (PO) of R117H-CFTR...
2017: PloS One
https://www.readbyqxmd.com/read/28416667/autonomous-sweat-extraction-and-analysis-applied-to-cystic-fibrosis-and-glucose-monitoring-using-a-fully-integrated-wearable-platform
#4
Sam Emaminejad, Wei Gao, Eric Wu, Zoe A Davies, Hnin Yin Yin Nyein, Samyuktha Challa, Sean P Ryan, Hossain M Fahad, Kevin Chen, Ziba Shahpar, Salmonn Talebi, Carlos Milla, Ali Javey, Ronald W Davis
Perspiration-based wearable biosensors facilitate continuous monitoring of individuals' health states with real-time and molecular-level insight. The inherent inaccessibility of sweat in sedentary individuals in large volume (≥10 µL) for on-demand and in situ analysis has limited our ability to capitalize on this noninvasive and rich source of information. A wearable and miniaturized iontophoresis interface is an excellent solution to overcome this barrier. The iontophoresis process involves delivery of stimulating agonists to the sweat glands with the aid of an electrical current...
April 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28414677/a-rare-case-of-tropical-pyomysitis-acquired-on-vacation-in-a-healthy-male
#5
K Poole, T Tran
INTRODUCTION: Pyomyositis has traditionally been considered a tropical disease. Increasing prevalence has been observed in more northern climates, especially with HIV, immunosuppression, and IV drug abuse as predisposing factors. Pyomyositis has the tendency to mimic other conditions, such as muscle contusion, necrotizing fasciitis, or septic arthritis. The rarity of this disease and non-specificity of its symptoms often lead to delay in appropriate diagnosis and treatment. CASE: 24-year-old man, seen 2 days prior in orthopedics clinic and the Emergency Department for persistent gluteal pain thought to be due to right-sided sciatica, was admitted following worsening pain, diffuse generalized weakness with polyarthralgias and myalgias These symptoms were associated with night sweats, shaking chills, and difficulty walking...
March 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28400505/no-effect-of-ascorbate-on-cutaneous-vasodilation-and-sweating-in-older-men-and-those-with-type-2-diabetes-exercising-in-the-heat
#6
Naoto Fujii, Robert D Meade, Pegah Akbari, Jeffrey C Louie, Lacy M Alexander, Pierre Boulay, Ronald J Sigal, Glen P Kenny
Aging and chronic disease such as type 2 diabetes (T2D) are associated with impairments in the body's ability to dissipate heat. To reduce the risk of heat-related injuries in these heat vulnerable individuals, it is necessary to identify interventions that can attenuate this impairment. We evaluated the hypothesis that intradermal administration of ascorbate improves cutaneous vasodilation and sweating in older adults via nitric oxide synthase (NOS)-dependent mechanisms during exercise in the heat and whether these improvements, if any, are greater in individuals with T2D...
April 2017: Physiological Reports
https://www.readbyqxmd.com/read/28369152/the-human-body-odor-compound-androstadienone-leads-to-anger-dependent-effects-in-an-emotional-stroop-but-not-dot-probe-task-using-human-faces
#7
Jonas Hornung, Lydia Kogler, Stephan Wolpert, Jessica Freiherr, Birgit Derntl
The androgen derivative androstadienone is a substance found in human sweat and thus is a putative human chemosignal. Androstadienone has been studied with respect to effects on mood states, attractiveness ratings, physiological and neural activation. With the current experiment, we aimed to explore in which way androstadienone affects attention to social cues (human faces). Moreover, we wanted to test whether effects depend on specific emotions, the participants' sex and individual sensitivity to smell androstadienone...
2017: PloS One
https://www.readbyqxmd.com/read/28357484/new-approach-for-cystic-fibrosis-diagnosis-based-on-chloride-potassium-ratio-analyzed-in-non-invasively-obtained-skin-wipe-sweat-samples-by-capillary-electrophoresis-with-contactless-conductometric-detection
#8
Pavol Ďurč, František Foret, Eva Pokojová, Lukáš Homola, Jana Skřičková, Vladimír Herout, Milan Dastych, Hana Vinohradská, Petr Kubáň
A new approach for sweat analysis used in cystic fibrosis (CF) diagnosis is proposed. It consists of a noninvasive skin-wipe sampling followed by analysis of target ions using capillary electrophoresis with contactless conductometric detection (C4D). The skin-wipe sampling consists of wiping a defined skin area with precleaned cotton swab moistened with 100 μL deionized water. The skin-wipe sample is then extracted for 3 min into 400 μL deionized water, and the extract is analyzed directly. The developed sampling method is cheap, simple, fast, and painless, and can replace the conventional pilocarpine-induced sweat chloride test commonly applied in CF diagnosis...
March 29, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28343568/thermogenic-and-psychogenic-recruitment-of-human-eccrine-sweat-glands-variations-between-glabrous-and-non-glabrous-skin-surfaces
#9
Christiano A Machado-Moreira, Nigel A S Taylor
Human eccrine sweat-gland recruitment and secretion rates were investigated from the glabrous (volar) and non-glabrous hand surfaces during psychogenic (mental arithmetic) and thermogenic stimuli (mild hyperthermia). It was hypothesised that these treatments would activate glands from both skin surfaces, with the non-thermal stimulus increasing secretion rates primarily by recruiting more sweat glands. Ten healthy men participated in two seated, resting trials in temperate conditions (25-26°C). Trials commenced under normothermic conditions during which the first psychogenic stress was applied...
April 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28295553/serum-carcinoembryonic-antigen-specifically-increases-among-various-serum-markers-of-adenocarcinoma-in-hypohidrosis-or-conditions-related-to-hypohidrosis
#10
Masaru Honma, Hiroyoshi Nozaki, Hiroko Nagahata, Mizue Fujii, Takashi Shibuya, Kyoko Kanno, Masako Minami-Hori, Akemi Ishida-Yamamoto
Anhidrosis/hypohidrosis are conditions presenting various level of sweating dysfunction. Among them, acquired idiopathic generalized anhidrosis (AIGA) presents inadequate decrease or loss of sweating without apparent neurological and dermatological symptoms except cholinergic urticaria. Recently, serum level of carcinoembryonic antigen (CEA), one of the most well-known tumor markers, has been proposed as a clinical marker reflecting activity of AIGA. This study was performed to verify the specificity and independence of serum CEA level from the other serum tumor markers especially related to adenocarcinoma...
March 11, 2017: Journal of Dermatology
https://www.readbyqxmd.com/read/28275061/impaired-sweating-responses-to-a-passive-whole-body-heat-stress-in-individuals-with-multiple-sclerosis
#11
Dustin R Allen, Mu Huang, Iqra M Parupia, Ariana R Dubelko, Elliot M Frohman, Scott L Davis
Multiple sclerosis (MS) is an autoimmune disease that affects the central nervous system (CNS), disrupting autonomic function. The aim of this study was to test the hypothesis that individuals with MS have blunted control of thermoregulatory reflex increases in sweat rate (SR) and cutaneous vasodilation compared to controls during a passive whole-body heat stress (WBH). Eighteen individuals with relapsing-remitting MS and 18 healthy controls (CON) participated in the study. Core temperature (Tcore), skin temperature, heart rate, arterial blood pressure (10 min intervals), skin blood flow (laser-Doppler flux: LDF), and SR were continuously measured during normothermic baseline (34 °C water perfusing a tube-lined suit) and WBH (increased Tcore 0...
March 8, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28272337/impact-of-isotonic-beverage-on-the-hydration-status-of-healthy-chinese-adults-in-air-conditioned-environment
#12
Phei Ching Siow, Wei Shuan Kimberly Tan, Christiani Jeyakumar Henry
People living in tropical climates spend much of their time in confined air-conditioned spaces, performing normal daily activities. This study investigated the effect of distilled water (W) or isotonic beverage (IB) on the hydration status in subjects living under these conditions. In a randomized crossover design, forty-nine healthy male subjects either consumed beverage or IB over a period of 8 h (8 h) in a controlled air-conditioned environment. Blood, urine, and saliva samples were collected at baseline and after 8 h...
March 7, 2017: Nutrients
https://www.readbyqxmd.com/read/28265410/adolescents-with-full-or-subthreshold-anorexia-nervosa-in-a-naturalistic-sample-characteristics-and-treatment-outcome
#13
Katarina Lindstedt, Lars Kjellin, Sanna Aila Gustafsson
BACKGROUND: Anorexia Nervosa (AN) destroys developmentally important early years of many young people and knowledge is insufficient regarding course, treatment outcome and prognosis. Only a few naturalistic studies have been conducted within the field of eating disorder (ED) research. In this naturalistic study we included adolescents with AN or subthreshold AN treated in outpatient care, and the overall aim was to examine sample characteristics and treatment outcome. Additional aims were to examine potential factors associated with remission as an outcome variable, and possible differences between three time periods for treatment onset...
2017: Journal of Eating Disorders
https://www.readbyqxmd.com/read/28256922/obese-adolescents-show-reduced-cognitive-processing-speed-compared-with-healthy-weight-peers
#14
Victoria Sweat, Kathy F Yates, Renee Migliaccio, Antonio Convit
BACKGROUND: Childhood obesity and obesity-associated diabetes and metabolic syndrome (MetS) continue to rise. Obesity has been linked to structural and functional brain abnormalities, particularly in the frontal lobe. METHODS: One hundred sixty-two adolescents (aged 19.53 ± 1.53 years) underwent medical, neurocognitive, and brain magnetic resonance imaging assessments. Participants were either healthy weight (BMI <25.0 kg/m(2) or BMI percentile <85%) or obese (BMI ≥30...
March 3, 2017: Childhood Obesity
https://www.readbyqxmd.com/read/28240705/skin-tattoos-alter-sweat-rate-and-na-concentration
#15
Maurie Joe Luetkemeier, Joseph Michael Hanisko, Kyle Mathiew Aho
The popularity of tattoos has increased tremendously in the last 10-years particularly among athletes and military personnel. The tattooing process involves permanently depositing ink under the skin at a similar depth as eccrine sweat glands (3-5 mm). PURPOSE: The purpose of this study was to compare the sweat rate and sweat Na concentration of tattooed vs. non-tattooed skin. METHODS: The participants were 10 healthy males (age = 21 ± 1 yr) all with a unilateral tattoo covering a circular area at least 5...
February 25, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28209466/pharmacokinetics-and-safety-of-cavosonstat-n91115-in-healthy-and-cystic-fibrosis-adults-homozygous-for-f508del-cftr
#16
Scott H Donaldson, George M Solomon, Pamela L Zeitlin, Patrick A Flume, Alicia Casey, Karen McCoy, Edith T Zemanick, Arun Mandagere, Janice M Troha, Steven A Shoemaker, James F Chmiel, Jennifer L Taylor-Cousar
BACKGROUND: Cavosonstat (N91115), an orally bioavailable inhibitor of S-nitrosoglutathione reductase, promotes cystic fibrosis transmembrane conductance regulator (CFTR) maturation and plasma membrane stability, with a mechanism of action complementary to CFTR correctors and potentiators. METHODS: A Phase I program evaluated pharmacokinetics, drug-drug interactions and safety of cavosonstat in healthy and cystic fibrosis (CF) subjects homozygous for F508del-CFTR...
February 13, 2017: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/28202441/effect-of-hypohydration-on-postsynaptic-cutaneous-vasodilation-and-sweating-in-healthy-men
#17
Matthew A Tucker, Ashley Six, Nicole E Moyen, Alf Z Satterfield, Matthew S Ganio
Hypohydration decreases cutaneous vasodilation and sweating during heat stress, but it is unknown if these decrements are from postsynaptic (i.e. sweat gland/blood vessel) alterations. PURPOSE: To determine if hypohydration affects postsynaptic cutaneous vasodilation and sweating responses. METHODS: 12 healthy men participated in euhydrated (EU) and hypohydrated (HY) trials, with hypohydration induced via fluid restriction and passive heat-stress. Changes in cutaneous vascular conductance (CVC; %max) in response to incremental intradermal infusion of the endothelium-independent vasodilator sodium nitroprusside (SNP) and the endothelium-dependent vasodilator methacholine chloride (MCh) were assessed by laser Doppler flowmetry...
February 15, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28197350/disseminated-mycobacterium-interjectum-infection-with-bacteremia-hepatic-and-pulmonary-involvement-associated-with-a-long-term-catheter-infection
#18
David Sotello, D Jane Hata, Mohammed Reza, Raj Satyanarayana, Vichaya Arunthari, Wendelyn Bosch
We present a 49-year-old female with one year of intermittent fevers, chills, night sweats, and significant weight loss. Liver and lung biopsy showed evidence of a granulomatous process. Blood and liver biopsy cultures yielded growth of presumed Mycobacterium interjectum, thought to be related to a disseminated long-term central venous catheter infection. She successfully received one year of combined antimicrobial therapy after catheter removal without recurrence of disease. M. interjectum has been previously described as a cause of lymphadenitis in healthy children and associated with pulmonary disease in adults, although other localized infections have been reported...
2017: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/28193033/wearable-potentiometric-chloride-sweat-sensor-the-critical-role-of-the-salt-bridge
#19
Dong-Hoon Choi, Jin Seob Kim, Garry R Cutting, Peter C Searson
The components of sweat provide an array of potential biomarkers for health and disease. Sweat chloride is of interest as a biomarker for cystic fibrosis, electrolyte metabolism disorders, electrolyte balance, and electrolyte loss during exercise. Developing wearable sensors for biomarkers in sweat is a major technological challenge. Potentiometric sensors provide a relatively simple technology for on-body sweat chloride measurement, however, equilibration between reference and test solutions has limited the time over which accurate measurements can be made...
December 20, 2016: Analytical Chemistry
https://www.readbyqxmd.com/read/28161081/validation-of-a-self-report-questionnaire-assessing-the-bodily-and-physiological-sensations-of-orgasm
#20
Samantha Dubray, Marina Gérard, Dominic Beaulieu-Prévost, Frédérique Courtois
INTRODUCTION: Despite a plethora of research on sexual functioning during the past decades, the field is still lacking standardized measurements specifically characterizing orgasm. Although several validated tools are available to assess sexual function in healthy and clinical populations, items on orgasm are limited to frequency or dichotomous responses. A neurophysiologic model of orgasm developed from previous research in able-bodied and spinally injured populations offers a promising framework for the construction of a new questionnaire...
February 2017: Journal of Sexual Medicine
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