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Physiological Research

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https://www.readbyqxmd.com/read/27824480/the-molecular-genetic-background-of-familial-hypercholesterolemia-data-from-the-slovak-nation-wide-survey
#1
D Gabčová, B Vohnout, D Staníková, M Hučkova, M Kadurová, M Debreová, M Kozárová, Ľ Fábryová, J Staník, I Klimeš, K Rašlová, D Gašperiková
Familial hypercholesterolemia (FH) is most frequently caused by LDLR or APOB mutations. Therefore, the aim of our study was to examine the genetic background of Slovak patients suspected of FH. Patients with clinical suspicion of FH (235 unrelated probands and 124 family relatives) were recruited throughout Slovakia during the years 2011-2015. The order of DNA analyses in probands was as follows: 1. APOB mutation p.Arg3527Gln by real-time PCR method, 2. direct sequencing of the LDLR gene 3. MLPA analysis of the LDLR gene...
November 8, 2016: Physiological Research
https://www.readbyqxmd.com/read/27782749/lower-physical-fitness-in-patients-with-primary-aldosteronism-is-linked-to-the-severity-of-hypertension-and-kalaemia
#2
V Tuka, M Matoulek, T Zelinka, J Rosa, O Petrák, O Mikeš, Z Krátká, B Štrauch, R Holaj, J Widimský
Hypokalaemia as a typical feature of primary aldosteronism (PA) is associated with muscle weakness and could contribute to lower cardiopulmonary fitness. The aim of this study was to describe cardiopulmonary fitness and exercise blood pressure and their determinants during a symptom-limited exercise stress test in patients with PA. We performed a cross-sectional study of patients with confirmed PA who were included before adrenal vein sampling on whom a symptom-limited exercise stress test with expired gas analysis was performed...
October 26, 2016: Physiological Research
https://www.readbyqxmd.com/read/27782748/connexin-50-mutation-lowers-blood-pressure-in-spontaneously-hypertensive-rat
#3
O Šeda, F Liška, M Pravenec, Z Vernerová, L Kazdová, D Křenová, V Zídek, L Šedová, M Krupková, V Křen
We assessed the effect of the previously uncovered gap junction protein alpha 8 (Gja8) mutation present in spontaneously hypertensive rat - dominant cataract (SHR-Dca) strain on blood pressure, metabolic profile, and heart and renal transcriptomes. Adult, standard chow-fed male rats of SHR and SHR-Dca strains were used. We found a significant, consistent 10-15 mmHg decrease in both systolic and diastolic blood pressures in SHR-Dca compared with SHR (P<0.01 and P<0.05, respectively; repeated measures analysis of variance (ANOVA))...
October 26, 2016: Physiological Research
https://www.readbyqxmd.com/read/27782747/three-types-of-ion-channels-in-the-cell-membrane-of-mouse-fibroblasts
#4
M Koselski, A Olszewska, A Hordyjewska, T Małecka-Massalska, K Trebacz
Patch clamp recordings carried out in the inside-out configuration revealed activity of three kinds of channels: nonselective cation channels, small-conductance K(+) channels, and large-conductance anion channels. The nonselective cation channels did not distinguish between Na(+) and K(+). The unitary conductance of these channels reached 28 pS in a symmetrical concentration of 200 mM NaCl. A lower value of this parameter was recorded for the small-conductance K(+) channels and in a 50-fold gradient of K(+) (200 mM/4 mM) it reached 8 pS...
October 26, 2016: Physiological Research
https://www.readbyqxmd.com/read/27782746/metabolic-status-and-ghrelin-regulate-plasma-levels-and-release-of-ovarian-hormones-in-layer-chicks
#5
A V Sirotkin, A H Harrath, R Grossmann
The aim of the present study was to examine the role of nutritional status, the metabolic hormone ghrelin and their interrelationships in the control of chicken hormones involved in the regulation of reproduction. For this purpose, we identified the effect of food deprivation, administration of ghrelin 1-18 and their combination on plasma levels of testosterone (T), estradiol (E), arginine-vasotocin (AVT) and growth hormone (GH) as well as the release of these hormones by isolated and cultured ovarian fragments...
October 26, 2016: Physiological Research
https://www.readbyqxmd.com/read/27782745/obestatin-modulates-ghrelin-s-effects-on-the-basal-and-stimulated-testosterone-secretion-by-the-testis-of-rat-an-in-vitro-study
#6
T Afsar, S Jahan, S Razak, A Almajwal, M Abulmeaty, H Wazir, A Majeed
The functional antagonism between obestatin and ghrelin in testis is under investigated. We investigated the ability of obestatin to counteract the inhibitory effect of ghrelin on basal and stimulated testosterone (T) secretion in vitro. Testicular strips from adult rats were incubated with 10 ng/ml and 100 ng/ml of obestatin alone, ghrelin alone and obestatin + ghrelin. Obestatin modulation of stimulated T secretion was evaluated by incubation of testicular samples with 10 ng/ml and 100 ng/ml obestatin, ghrelin and obestatin+ ghrelin in the absence and presence of 10 IU of human chorionic gonadotrophin (hCG)...
October 26, 2016: Physiological Research
https://www.readbyqxmd.com/read/27782744/efficacy-and-safety-of-human-mesenchymal-stromal-cells-in-healing-of-critical-size-bone-defects-in-immunodeficient-rats
#7
R Pytlík, C Rentsch, T Soukup, L Novotný, B Rentsch, V Kanderová, H Rychtrmocová, M Kalmárová, D Stehlík, M Trněný, O Slanař
To evaluate the preclinical efficacy and safety of human mesenchymal stem cells (hMSC) rapidly expanded in growth medium for clinical use with human serum and recombinant growth factors, we conducted a controlled, randomized trial of plasma clots with hMSC vs. plasma clots only in critical segmental femoral defects in rnu/rnu immunodeficient rats. X-ray, microCT and histomorphometrical evaluation were performed at 8 and 16 weeks. MSC were obtained from healthy volunteers and patients with lymphoid malignancy...
October 26, 2016: Physiological Research
https://www.readbyqxmd.com/read/27782743/the-labile-iron-pool-in-monocytes-reflects-the-activity-of-the-atherosclerotic-process-in-men-with-chronic-cardiovascular-disease
#8
P Riško, J Pláteník, R Buchal, J Potočková, P J Kraml
The study investigates the relationship between the labile iron pool (LIP) in circulating monocytes and markers of iron metabolism, inflammation, oxidative stress, endothelial dysfunction and arterial elasticity in patients with chronic cardiovascular disease and in healthy volunteers. The patients with a history of CVEs had significantly higher LIP values than did the control group (1.94+/-0.46 microM vs. 1.62+/-0.49 microM, p=0.02). Except for the leukocyte number (WBCs), the groups did not differ in other inflammatory markers (CRPus, CD 163, MPO, MMP-1)...
October 26, 2016: Physiological Research
https://www.readbyqxmd.com/read/27782742/short-term-administration-of-melatonin-or-ghrelin-on-diabetic-rats-effects-on-angiotensin-ii-and-vasopressin-induced-uterine-contractility
#9
T Georgiev, A Tolekova, R Kalfin, P Hadzhibozheva
The aim of the present study was to investigate the effects of Angiotensin II (AngII) and Arginin-Vasopressin (AVP) on contractility of non-pregnant uterus in diabetic Wistar rats and to explore whether one-week administration of Melatonin (MLT) or Ghrelin (GHR) will change the response of diabetic uterine muscle to AngII and AVP. Uterine horns, prepared by the method of isolated tissues were investigated as well as glycemic profile, blood pressure and body weight. The research of smooth muscle contractions was made by a new method of analysis, characterizing in detail the various phases of the myometrial activity...
October 26, 2016: Physiological Research
https://www.readbyqxmd.com/read/27782741/apocynin-ameliorates-pressure-overload-induced-cardiac-remodeling-by-inhibiting-oxidative-stress-and-apoptosis
#10
J-J Liu, Y Lu, N-N Ping, X Li, Y-X Lin, C F Li
Oxidative stress plays an important role in pressure overload-induced cardiac remodeling. The purpose of this study was to determine whether apocynin, a nicotinamide adenine dinucleotide phosphate (NADPH) oxidase inhibitor, attenuates pressure overload-induced cardiac remodeling in rats. After abdominal aorta constriction, the surviving rats were randomly divided into four groups: sham group, abdominal aorta constriction group, apocynin group, captopril group. Left ventricular pathological changes were studied using Masson's trichrome staining...
October 26, 2016: Physiological Research
https://www.readbyqxmd.com/read/27782740/vasodilatory-responses-of-renal-interlobular-arteries-to-epoxyeicosatrienoic-acids-analog-are-not-enhanced-in-ren-2-transgenic-hypertensive-rats-evidence-against-a-role-of-direct-vascular-effects-of-epoxyeicosatrienoic-acids-in-progression-of-experimental-heart
#11
A Sporková, Z Husková, P Škaroupková, N R Reddy, J R Falck, J Sadowski, L Červenka
Pathophysiological mechanisms underlying the development of renal dysfunction and progression of congestive heart failure (CHF) remain poorly understood. Recent studies have revealed striking differences in the role of epoxyeicosatrienoic acids (EETs), active products of cytochrome P-450-dependent epoxygenase pathway of arachidonic acid, in the progression of aorto-caval fistula (ACF)-induced CHF between hypertensive Ren-2 renin transgenic rats (TGR) and transgene-negative normotensive Hannover Sprague-Dawley (HanSD) controls...
October 26, 2016: Physiological Research
https://www.readbyqxmd.com/read/27782739/body-composition-is-associated-with-bone-and-glucose-metabolism-in-postmenopausal-women-with-type-2-diabetes-mellitus
#12
I Raška, M Rašková, V Zikán, J Škrha
Type 2 diabetes mellitus (T2DM) is associated with increased fracture risk; the underlying mechanism remains unexplained. This study aimed to investigate the relationships between body composition and bone and glucose metabolism in postmenopausal women with T2DM. Dual-energy X-ray absorptiometry was used to measure bone mineral density (BMD) and body composition. A total of 68 postmenopausal women with T2DM and 71 controls were eligible for the study. In contrast to normal BMD in T2DM, a similar prevalence of low-trauma fractures was observed in both groups...
October 26, 2016: Physiological Research
https://www.readbyqxmd.com/read/27782738/interleukin-10-is-differentially-expressed-in-the-small-intestine-and-the-colon-experiencing-chronic-inflammation-and-ulcerative-colitis-induced-by-dextran-sodium-sulfate-in-young-pigs
#13
D Lackeyram, D Young, C J Kim, C Yang, T L Archbold, Y Mine, M Z Fan
Intestinal inflammation induced with dextran sodium sulfate (DSS) is used to study acute or chronic ulcerative colitis in animal models. Decreased gut tissue anti-inflammatory cytokine IL-10 concentration and mRNA abundance are associated with the development of chronic bowel inflammation. Twelve piglets of 3 days old were fitted with an intragastric catheter and randomly allocated into control and DSS groups by administrating either sterile saline or 1.25 g of DSS/kg body weight (BW) in saline per day, respectively, for 10 days...
October 26, 2016: Physiological Research
https://www.readbyqxmd.com/read/27782737/resveratrol-alleviates-ethanol-induced-hormonal-and-metabolic-disturbances-in-the-rat
#14
K Szkudelska, M Deniziak, P Roś, K Gwóźdź, T Szkudelski
Resveratrol is a polyphenol found in different plant species and having numerous health-promoting properties in animals and humans. However, its protective action against deleterious effects of ethanol is poorly elucidated. In the present study, the influence of resveratrol (10 mg/kg/day) on some hormones and metabolic parameters was determined in rats ingesting 10% ethanol solution for two weeks. Blood levels of insulin, glucagon and adiponectin were affected by ethanol, however, resveratrol partially ameliorated these changes...
October 26, 2016: Physiological Research
https://www.readbyqxmd.com/read/27782736/effects-of-high-and-low-sodium-diet-on-blood-pressure-and-heart-rate-in-mice-lacking-the-functional-grainyhead-like-1-gene
#15
A Walkowska, M Pawlak, S M Jane, E Kompanowska-Jezierska, T Wilanowski
Hypertension is a major health problem throughout the world because of its high prevalence and its association with increased risk of cardiovascular disease. Two independent studies discovered a locus conferring susceptibility to essential hypertension on chromosome 2, in the 2p25 region, but the causative gene remains unknown. Grainyhead-like 1 (GRHL1) is one of the genes located in this region. Our experiments determined that the Grhl1-null mice, when fed standard diet, have the same blood pressure as their wild type littermate controls...
October 26, 2016: Physiological Research
https://www.readbyqxmd.com/read/27875900/effects-of-necrostatin-1-an-inhibitor-of-necroptosis-and-its-inactive-analogue-nec-1i-on-basal-cardiovascular-function
#16
A Szobi, T Rajtik, A Adameova
Inhibition of receptor-interacting serine/threonine-protein kinase 1 (RIP1) by necrostatin-1 (Nec-1) alleviates cardiac injury due to prevention of necroptotic cell death. Its inactive analogue necrostatin-1i (Nec-1i), lacking RIP1 activity, serves as a suitable control. It is unknown if these agents influence the heart function in the absence of damaging stimuli. For this purpose, we measured intraarterial blood pressure (systolic - sBP and diastolic - dBP) and ECG parameters after a bolus administration of Nec-1 and Nec-1i in rats during 30 min...
November 23, 2016: Physiological Research
https://www.readbyqxmd.com/read/27875899/amelioration-of-energy-metabolism-by-melatonin-in-skeletal-muscle-of-rats-with-lps-induced-endotoxemia
#17
E Ozkok, H Yorulmaz, G Ates, A Aksu, N Balkis, Ö Şahin, S Tamer
In the literature, few studies have investigated the effects of melatonin on energy metabolism in skeletal muscle in endotoxemia. We investigated the effects of melatonin on tissue structure, energy metabolism in skeletal muscle, and antioxidant level of rats with endotoxemia. We divided rats into 4 groups, control, lipopolysaccharide (LPS) (20 mg/kg, i.p., single dose), melatonin (10 mg/kg, i.p., three times), and melatonin + LPS. Melatonin was injected i.p. 30 min before and after the 2nd and 4th hours of LPS injection...
November 23, 2016: Physiological Research
https://www.readbyqxmd.com/read/27824481/novel-porcine-model-of-acute-severe-cardiogenic-shock-developed-by-upper-body-hypoxia
#18
P Ostadal, M Mlcek, S Strunina, M Hrachovina, A Kruger, D Vondrakova, M Janotka, P Hala, O Kittnar, P Neuzil
Despite the urgent need for experimental research in the field of acute heart failure and, particularly cardiogenic shock, currently there are only limited options in large animal models enabling research using devices applied to human subjects. The majority of available models are either associated with an unacceptably high rate of acute mortality or are incapable of developing sufficient severity of acute heart failure. The objective of our research was to develop a novel large animal model of acute severe cardiogenic shock...
November 8, 2016: Physiological Research
https://www.readbyqxmd.com/read/27775426/postural-stability-and-responses-to-vibrations-in-patients-after-anterior-cruciate-ligament-surgical-reconstruction
#19
Z Hirjaková, H Šingliarová, D Bzdúšková, J Kimijanová, K Bučková, P Valkovič, F Hlavačka
The aim of the study was to evaluate the effect of surgical reconstruction of anterior cruciate ligament (ACL) on postural stability and responses to lower limb (LL) muscles vibrations. Centre of pressure (CoP) was measured in 17 subjects during stance on firm/foam surface with eyes open/closed and during unilateral vibrations of LL muscles (m. triceps surae - TS, m. quadriceps femoris - Q, m. quadriceps femoris and hamstrings simultaneously - QH). The measurements were performed: 1) preoperatively, 2) six weeks and 3) three months after the reconstruction...
October 24, 2016: Physiological Research
https://www.readbyqxmd.com/read/27775425/effect-of-deuterium-depleted-water-on-selected-cardiometabolic-parameters-in-fructose-treated-rats
#20
R Rehakova, J Klimentova, M Cebova, A Barta, Z Matuskova, P Labas, O Pechanova
Deuterium-depleted water (DDW) has a lower concentration of deuterium than occurs naturally (less than 145 ppm). While effects of DDW on cancer started to be intensively studied, the effects on cardiovascular system are completely unknown. Thus, we aimed to analyze the effects of DDW (55+/-5 ppm) administration to 12-week-old normotensive Wistar-Kyoto rats (WKY) and spontaneously hypertensive rats (SHR) treated with 15 % fructose for 6 weeks. Blood pressure (BP) and selected biochemical parameters were measured together with determination of nitric oxide synthase (NOS) activity and iNOS and eNOS protein expressions in the left ventricle (LV) and aorta...
October 24, 2016: Physiological Research
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