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https://www.readbyqxmd.com/read/28535093/the-effects-of-crushed-ice-ingestion-prior-to-steady-state-exercise-in-the-heat
#1
Matthew Zimmermann, Grant Landers, Karen E Wallman, Jacinta Saldaris
This study examined the physiological effects of crushed ice ingestion before steady state exercise in the heat. Ten healthy males with age (23 ± 3 y), height (176.9 ± 8.7 cm), body-mass (73.5 ± 8.0 kg), VO2peak (48.5 ± 3.6 mL∙kg∙min(-1)) participated in the study. Participants completed 60 min of cycling at 55% of their VO2peak preceded by 30 min of precooling whereby 7 g∙kg(-1) of thermoneutral water (CON) or crushed ice (ICE) was ingested. The reduction in Tc at the conclusion of precooling was greater in ICE (-0...
June 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28528375/hypothalamic-signaling-in-body-fluid-homeostasis-and-hypertension
#2
REVIEW
Brian J Kinsman, Haley N Nation, Sean D Stocker
PURPOSE OF REVIEW: The central nervous system plays a pivotal role in the regulation of extracellular fluid volume and consequently arterial blood pressure. Key hypothalamic regions sense and integrate neurohumoral signals to subsequently alter intake (thirst and salt appetite) and output (renal excretion via neuroendocrine and autonomic function). Here, we review recent findings that provide new insight into such mechanisms that may represent new therapeutic targets. RECENT FINDINGS: Implementation of cutting edge neuroscience approaches such as opto- and chemogenetics highlight pivotal roles of circumventricular organs to impact body fluid homeostasis...
June 2017: Current Hypertension Reports
https://www.readbyqxmd.com/read/28512433/reported-hydration-beliefs-and-behaviors-without-effect-on-plasma-sodium-in-endurance-athletes
#3
Daniela Chlíbková, Pantelis T Nikolaidis, Thomas Rosemann, Beat Knechtle, Josef Bednář
Purpose: Little information is available on the association of hydration beliefs and behaviors in endurance athletes and exercise-associated hyponatremia (EAH). The aim of the present study was to determine hydration beliefs and behaviors in endurance athletes. Method: A 100 and 38 recreational athletes [107 mountain bikers (MTBers) and 31 runners] competing in seven different endurance and ultra-endurance races completed pre- and post-race questionnaires, and a subgroup of 113 (82%) participants (82 MTBers and 31 runners) also provided their blood samples...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28512417/a-case-of-paraneoplastic-cushing-syndrome-presenting-as-hyperglycemic-hyperosmolar-nonketotic-syndrome
#4
Christina E Brzezniak, Nicole Vietor, Patricia E Hogan, Bryan Oronsky, Bennett Thilagar, Carolyn M Ray, Scott Caroen, Michelle Lybeck, Neil Oronsky, Corey A Carter
Carcinoid tumors are neuroendocrine tumors that mainly arise in the gastrointestinal tract, lungs, and bronchi. Bronchopulmonary carcinoids have been associated with Cushing syndrome, which results from ectopic adrenocorticotrophic hormone (ACTH) secretion. We report the case of a 65-year-old man, a colonel in the US Air Force, with metastatic bronchopulmonary carcinoid tumors treated on a clinical trial who was hospitalized for complaints of increasing thirst, polydipsia, polyuria, weakness, and visual changes...
January 2017: Case Reports in Oncology
https://www.readbyqxmd.com/read/28497286/the-influence-of-drinking-fluid-on-endurance-cycling-performance-a-meta-analysis
#5
REVIEW
Justin J Holland, Tina L Skinner, Christopher G Irwin, Michael D Leveritt, Eric D B Goulet
BACKGROUND: Fluid replacement during cycling exercise evolves on a spectrum from simply drinking to thirst to planned structured intake, with both being appropriate recommendations. However, with mixed findings suggesting fluid intake may or may not improve endurance cycling performance (ECP) in a diverse range of trained individuals, there is a clear need for summarised evidence regarding the effect of fluid consumption on ECP. OBJECTIVES: (1) Determine the magnitude of the effect of drinking fluid on performance during cycling exercise tasks of various durations, compared with no drinking; (2) examine the relationship between rates of fluid intake and ECP; and (3) establish fluid intake recommendations based on the observations between rates of fluid intake and ECP...
May 12, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28487877/preoperative-fasting-among-adult-patients-for-elective-surgery-in-a-kenyan-referral-hospital
#6
George Njoroge, Lucy Kivuti-Bitok, Samuel Kimani
Background. Preoperative fasting (POF) is physiologically and precautionary important during anesthesia and surgery. POF from midnight has been practiced despite the recommended shorter practice. Objective. Assessing preoperative fasting among adult patients scheduled for elective surgery at Kenyatta National Hospital (KNH). Methods. A descriptive cross-sectional study involving 65 surgical patients. A questionnaire of mixed questions on demographics, reasons, source of instructions, opinion on instructions, time, premedication practices, outcome, and complains on NPO was used...
2017: International Scholarly Research Notices
https://www.readbyqxmd.com/read/28483362/adipsic-diabetes-insipidus-revealing-a-bifocal-intracranial-germinoma
#7
Julie Kreutz, Iulia Potorac, Laurence Lutteri, Christine Gennigens, Didier Martin, Adrian F Daly, Jean-Francois Bonneville, Luaba Tshibanda, Albert Beckers
Adipsic diabetes insipidus is a rare complication of intracranial tumors in which impaired antidiuretic hormone secretion is associated with the loss of thirst sensation. Here, we present the case of a patient with bifocal intracranial germinoma, diagnosed due to symptoms mainly caused by adipsic diabetes insipidus. This is, to our knowledge, the first case of adipsic diabetes insipidus revealing an intracranial germinoma reported in the literature. We describe the diagnostic procedures and the three-year follow-up of this patient...
May 5, 2017: Annales D'endocrinologie
https://www.readbyqxmd.com/read/28471221/the-salience-of-a-reward-cue-can-outlast-reward-devaluation
#8
Matteo De Tommaso, Tommaso Mastropasqua, Massimo Turatto
Reward cues can be perceived as highly attractive stimuli because of their acquired motivational properties. However, because the motivational value of reward changes after reward receipt, a debated question is whether the attentional salience of reward cues changes accordingly. In Experiment 1, thirsty participants learned 3 cue-reward associations involving different contingencies. Then, while thirsty, participants performed a visual-search task under extinction, during which the previous reward cues appeared as irrelevant stimuli containing target and distractor items...
May 4, 2017: Behavioral Neuroscience
https://www.readbyqxmd.com/read/28469924/anorexia-cachexia-syndrome-like-hypothalamic-neuroendocrine-dysfunction-in-a-patient-with-a-papillary-craniopharyngioma
#9
Lourdes Balcázar-Hernández, Guadalupe Vargas-Ortega, Yelitza Valverde-García, Victoria Mendoza-Zubieta, Baldomero González-Virla
The craniopharyngiomas are solid cystic suprasellar tumors that can present extension to adjacent structures, conditioning pituitary and hypothalamic dysfunction. Within hypothalamic neuroendocrine dysfunction, we can find obesity, behavioral changes, disturbed circadian rhythm and sleep irregularities, imbalances in the regulation of body temperature, thirst, heart rate and/or blood pressure and alterations in dietary intake (like anorexia). We present a rare case of anorexia-cachexia syndrome like a manifestation of neuroendocrine dysfunction in a patient with a papillary craniopharyngioma...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28426322/formative-research-to-design-a-promotional-campaign-to-increase-drinking-water-among-central-american-latino-youth-in-an-urban-area
#10
Nicole Barrett, Uriyoán Colón-Ramos, Allison Elkins, Ivonne Rivera, W Douglas Evans, Mark Edberg
Latinos consume more sugary drinks and less water than other demographic groups. Our objective was to understand beverage choice motivations and test promotional concepts that can encourage Central American Latino urban youth to drink more water. Two rounds of focus group discussions were conducted (n = 10 focus groups, 61 participants, 6-18 years old). Data were transcribed verbatim and analyzed using inductive and deductive coding approaches. Youth motivations for drinking water were shaped by level of thirst, weather, energy, and perceptions of health benefits...
April 20, 2017: Journal of Health Communication
https://www.readbyqxmd.com/read/28424587/interactions-of-the-mechanosensitive-channels-with-extracellular-matrix-integrins-and-cytoskeletal-network-in-osmosensation
#11
REVIEW
Runsheng Jiao, Dan Cui, Stephani C Wang, Dongyang Li, Yu-Feng Wang
Life is maintained in a sea water-like internal environment. The homeostasis of this environment is dependent on osmosensory system translation of hydromineral information into osmotic regulatory machinery at system, tissue and cell levels. In the osmosensation, hydromineral information can be converted into cellular reactions through osmoreceptors, which changes thirst and drinking, secretion of antidiuretic vasopressin (VP), reabsorption of water and salt in the kidneys at systemic level as well as cellular metabolic activity and survival status at tissue level...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28411128/the-effects-of-experimental-gestational-hypertension-on-maternal-blood-pressure-and-fluid-intake-and-pre-weanling-hypothalamic-neuronal-activity
#12
Juan Arguelles, Carmen Perillan, Terry G Beltz, Baojian Xue, Daniel Badaue-Passos, Jose A Vega, Alan Kim Johnson
To examine the fetal programming effects of maternal hypertension, natriophilia and hyperreninemia [experimentally induced in rats by partial inter-renal aortic ligature (PAL) prior to mating] fos immunoreactivity was studied in 6-day-old offspring of PAL and control mothers. The purposes of the present set of experiments were twofold. The first was to characterize the effects of PAL on the mother's arterial blood pressure and intake of salt (1.8% NaCl solution) and water over the course of gestation. Second, was to study the pattern of neuronal activation in key brain areas of 6-day-old offspring treated with the dipsogen isoproterenol that were from PAL and control mothers...
April 12, 2017: Appetite
https://www.readbyqxmd.com/read/28376976/environmental-tobacco-smoke-relationship-to-early-pregnancy-discomforts
#13
Hui-Jung Hung, Chiu-Ying Chen, Shu-Li Wang, Trong-Neng Wu, Chiu-Hsiang Lee, Shi-Yann Cheng
OBJECTIVES: We assessed environmental tobacco smoke (ETS) and examined its association with pregnancy discomforts. METHODS: We used structured questionnaires to interview a convenience sample of 139 pregnant women (8-20 weeks of gestation) recruited from 2 hospitals in central Taiwan. RESULTS: We found that 84% of the participants experienced ETS exposure in their households, workplaces, and/or public areas. Bivariate analyses showed the severity of pregnancy discomforts in the participants exposed to a high level of ETS was higher than that in those exposed to a low level of ETS...
May 1, 2017: American Journal of Health Behavior
https://www.readbyqxmd.com/read/28372632/renal-compensatory-adaptation-for-water-handling-in-a-patient-with-adipsic-diabetes-insipidus-after-clipping-of-a-ruptured-aneurysm-of-the-anterior-communicating-artery%C3%A2
#14
Eri Imai, Shuzo Kaneko, Yusuke Tsukamoto
A 38-year-old Japanese man who had undergone clipping surgery for a ruptured aneurysm of the anterior communicating artery 2 days prior, suddenly developed refractory hypernatremia (serum sodium (Na) 156 - 162 mmol/L). Symptoms included low plasma vasopressin, fluctuating urine osmolality (120 - 710 mOsm/kg) and lack of thirst, all suggesting adipsic diabetes insipidus (ADI). Hypernatremia was corrected by scheduled water intake with desmopressin administration. During 1-year follow-up after the surgery, his serum Na level normalized despite the suspension of desmopressin, but neither thirst nor osmolality-dependent vasopressin release recovered...
April 4, 2017: Clinical Nephrology
https://www.readbyqxmd.com/read/28358037/type-1-diabetes-mellitus
#15
REVIEW
Anastasia Katsarou, Soffia Gudbjörnsdottir, Araz Rawshani, Dana Dabelea, Ezio Bonifacio, Barbara J Anderson, Laura M Jacobsen, Desmond A Schatz, Åke Lernmark
Type 1 diabetes mellitus (T1DM), also known as autoimmune diabetes, is a chronic disease characterized by insulin deficiency due to pancreatic β-cell loss and leads to hyperglycaemia. Although the age of symptomatic onset is usually during childhood or adolescence, symptoms can sometimes develop much later. Although the aetiology of T1DM is not completely understood, the pathogenesis of the disease is thought to involve T cell-mediated destruction of β-cells. Islet-targeting autoantibodies that target insulin, 65 kDa glutamic acid decarboxylase, insulinoma-associated protein 2 and zinc transporter 8 - all of which are proteins associated with secretory granules in β-cells - are biomarkers of T1DM-associated autoimmunity that are found months to years before symptom onset, and can be used to identify and study individuals who are at risk of developing T1DM...
March 30, 2017: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/28319257/hunger-and-thirst-interact-to-regulate-ingestive-behavior-in-flies-and-mammals
#16
REVIEW
Nicholas Jourjine
In animals, nervous systems regulate the ingestion of food and water in a manner that reflects internal metabolic need. While the coordination of these two ingestive behaviors is essential for homeostasis, it has been unclear how internal signals of hunger and thirst interact to effectively coordinate food and water ingestion. In the last year, work in insects and mammals has begun to elucidate some of these interactions. As reviewed here, these studies have identified novel molecular and neural mechanisms that coordinate the regulation of food and water ingestion behaviors...
March 20, 2017: BioEssays: News and Reviews in Molecular, Cellular and Developmental Biology
https://www.readbyqxmd.com/read/28316971/exercise-associated-hyponatremia-2017-update
#17
REVIEW
Tamara Hew-Butler, Valentina Loi, Antonello Pani, Mitchell H Rosner
Exercise-associated hyponatremia (EAH) was initially described in the 1980s in endurance athletes, and work done since then has conclusively identified that overdrinking beyond thirst and non-osmotic arginine vasopressin release are the most common etiologic factors. In recent years, EAH has been described in a broader variety of athletic events and also has been linked to the development of rhabdomyolysis. The potential role of volume and sodium depletion in a subset of athletes has also been described. This review focuses on the most recent literature in the field of EAH and summarizes key new findings in the epidemiology, pathophysiology, treatment, and prevention of this condition...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28303369/clinical-aspects-of-changes-in-water-and-sodium-homeostasis-in-the-elderly
#18
REVIEW
Christian A Koch, Tibor Fulop
The population of elderly individuals is increasing worldwide. With aging, various hormonal and kidney changes occur, both affecting water homeostasis. Aging is a risk factor for chronic kidney disease (CKD) and many features of CKD are reproduced in the aging kidney. Dehydration and hyperosmolarity can be triggered by diminished thirst perception in this population. Elderly with dementia are especially susceptible to abnormalities of their electrolyte and body water homeostasis and should be (re-)assessed for polypharmacy...
March 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28302238/gitelman-syndrome
#19
Qurat Ul Ain Mustafa, Zujaja Hina Haroon, Aamir Ijaz, Muhammad Tanveer Sajid, Muhammad Ayyub
Gitelman syndrome (GS) is the most frequently inherited renal salt-wasting tubulointerstitial disease. It follows variable but usually asymptomatic benign course. We present a rare case of GS that remained clinical enigma. A 22-year male presented with severe episodic fatigue involving all limbs associated with episodes of sinking, palpitations, salt craving, increased thirst and frequent micturition hampering his routine daily activities. Laboratory workup revealed serum potassium, 2.7 mmol/L, serum magnesium, 0...
March 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28282222/a-life-course-theory-approach-to-understanding-eritrean-refugees-perceptions-of-preventive-health-care-in-the-united-states
#20
Heidi J Worabo
Thousands of Eritreans flee their homes each month, embarking on dangerous journeys. With these extreme life experiences in mind, this qualitative study aimed to better understand Eritrean resettled refugees' perceptions of United States (US) preventive health care through the lens of the Life Course Theory. Through secondary thematic analysis of narrative data, two over-arching themes emerged: 1) a thirst for information, understanding and affordable health care and 2) attitudes of gratitude and hope despite lack of information and funding...
April 2017: Issues in Mental Health Nursing
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