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Physiological Research

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https://www.readbyqxmd.com/read/29303614/red-palm-oil-supplementation-does-not-increase-blood-glucose-or-serum-lipids-levels-in-wistar-rats-with-different-thyroid-status
#1
H Rauchová, M Vokurková, S Pavelka, I Vaněčková, N Tribulová, T Soukup
Red palm oil (RPO) is a rich natural source of antioxidant vitamins, namely carotenes, tocopherols and tocotrienols. However, it contains approximately 50 % saturated fatty acids the regular consumption of which could negatively modify lipid profile. The aim of our study was to test whether 7 weeks of RPO supplementation (1 g/kg body weight/day) would affect blood glucose and lipid metabolism in adult male Wistar rats with altered thyroid status. We induced hypothyroidism and hyperthyroidism in rats by oral administration of either methimazole or mixture of thyroid hormones...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29303613/cellular-differentiation-of-non-transformed-intestinal-epithelial-cells-is-regulated-by-lactobacillus-rhamnosus-and-l-casei-strains
#2
J Kolinska, M Zakostelecka, Z Zemanova, V Lisa, J Golias, H Kozakova, B Dvorak
The aim of this study was to characterize an in vitro modulating effect of three commensal Lactobacillus strains on cellular differentiation of non-transformed crypt-like rat small intestinal cell line IEC-18. IEC-18 was grown on extracellular matrix (ECM), with or without presence of Lactobacillus strains. Gene expression of IEC-18 bacterial detection system - such as Toll-like receptors TLR-2, TLR-4, signal adapter MyD88, cytoplasmic NOD2 receptor, inflammatory cytokines IL-18, IL-1beta, chemokine IL-8 and enzyme caspase-1 - was evaluated using real-time PCR...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29303612/the-effect-of-induction-therapy-on-established-cmv-specific-t-cell-immunity-in-living-donor-kidney-transplantation
#3
L Stranavova, P Hruba, E Girmanova, I Tycova, A Slavcev, J Fronek, J Slatinska, P Reinke, H-D Volk, O Viklicky
Cytomegalovirus (CMV) infection influences both short and long term outcomes in immunosuppressed organ transplant recipients. The aim of this study was to evaluate the effect of different induction immunosuppression regimens on CMV specific T cell response in patients with already established CMV immunity. In 24 seropositive living donor kidney recipients, the frequency of CMV specific T cells was determined by ELISPOT (Enzyme-Linked ImmunoSpot) assay prior and 6 months after transplantation. Recipients' peripheral blood mononuclear cells were stimulated with immediate-early (IE1) and phosphoprotein 65 (pp65) CMV-derived peptide pools and the number of cells producing interferon gamma (IFN-gamma) was assessed...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29303611/aldosterone-modulates-blood-homocysteine-and-cholesterol-in-coronary-artery-disease-patients-a-possible-impact-on-atherothrombosis
#4
K Karolczak, P Kubalczyk, R Glowacki, R Pietruszynski, C Watala
Aldosterone plays a key role in maintaining the homeostasis of the whole organism. Under some circumstances, aldosterone can contribute to the progression of cardiovascular diseases, including coronary artery disease. This study demonstrates that aldosterone associates negatively with some lipidogram parameters and positively with the concentration of homocysteine. This associations are characteristic for coronary artery disease and are not present in control subjects. The findings also indicate that in vitro aldosterone stimulates homocysteine production by rat adrenal glands, which may explain the associations observed with coronary artery disease...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29303610/how-to-interpret-elevated-plasmatic-level-of-high-sensitive-troponin-t-in-newborns-and-infants
#5
P Jehlicka, M Huml, D Rajdl, A Mockova, M Matas, J Dort, A Masopustova
Research and clinical implications on novel cardiac biomarkers has intensified significantly in the past few years. The high-sensitive troponin T (hscTnT) assay plays a dominant role in diagnostic algorithm regarding myocardial injury in adults. Despite generally accepted use of hscTnT there are no data about physiological concentrations and cut-off limits in neonates and infants to date. The aim of this study is to assess hscTnT levels in healthy newborns and infants. Consecutively 454 healthy full termed newborns and 40 healthy infants were enrolled in the study...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29303609/buffering-agent-induced-lactose-content-increases-via-growth-hormone-mediated-activation-of-gluconeogenesis-in-lactating-goats
#6
L Li, M L He, Y Liu, Y S Zhang
Dairy goats are often fed a high-concentrate (HC) diet to meet their lactation demands; however, long-term concentrate feeding is unhealthy and leads to milk yield and lactose content decreases. Therefore, we tested whether a buffering agent is able to increase the output of glucose in the liver and influence lactose synthesis. Eight lactating goats were randomly assigned to two groups: one group received a HC diet (Concentrate : Forage = 6:4, HG) and the other group received the same diet with a buffering agent added (0...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29303608/histidine-metabolism-after-bretschneider-cardioplegia-in-cardiac-surgical-patients
#7
J K Teloh, L Ansorge, M Petersen, E Demircioglu, I N Waack, S Brauckmann, H Jakob, D-S Dohle
Bretschneider (histidine-tryptophan-ketoglutarate) solution with its high histidine concentration (198 mM) is one of many cardioplegic solutions, which are routinely used for cardiac arrest. The aim of this study was to evaluate the physiological biochemical degradation of administered histidine to histamine and its major urinary metabolite N methylimidazole acetic acid. A total number of thirteen consecutive patients scheduled for elective isolated coronary artery bypass grafting with cardiopulmonary bypass were enrolled in the prospective observational designed study at the Department of Thoracic and Cardiovascular Surgery between 04/2016 and 06/2016...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29303607/immunity-a-significant-pathogenic-factor-as-well-as-an-integral-part-of-the-sychoneuroendocrine-immune-regulations
#8
F VoŽeh
Immunity plays an important role in the reactivity of the organism and, in this context, is an essential factor in the pathogenesis of many diseases. Basically, there is no system or organ in the body, whose dysfunction is not related to immunity consequences. In addition, there are also multisystem diseases simultaneously involving multiple body systems. They are not always caused by weak immunity, but also often by modified immune reactions known as overshooting. The essence of all these diseases is a change in the reactivity of the organism where immunity plays an important role...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29303606/potential-neuroprotective-and-anti-apoptotic-properties-of-a-long-lasting-stable-analog-of-ghrelin-an-in-vitro-study-using-sh-sy5y-cells
#9
A Popelová, A Kákonová, L Hrubá, J Kuneš, L Maletínská, B Železná
Neurodegenerative disorders, such as Alzheimer's disease (AD) and Parkinson's disease (PD), are increasing in prevalence. Currently, there are no effective and specific treatments for these disorders. Recently, positive effects of the orexigenic hormone ghrelin on memory and learning were demonstrated in mouse models of AD and PD. In this study, we tested the potential neuroprotective properties of a stable and long-lasting ghrelin analog, Dpr(3)ghrelin (Dpr(3)ghr), in SH-SY5Y neuroblastoma cells stressed with 1...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29303605/neonatal-hypoglycemia-early-onset-diabetes-and-hypopituitarism-due-to-the-mutation-in-eif2s3-gene-causing-mehmo-syndrome
#10
J Stanik, M Skopkova, D Stanikova, K Brennerova, L Barak, L Ticha, J Hornova, I Klimes, D Gasperikova
Recently, the genetic cause of several syndromic forms of glycemia dysregulation has been described. One of them, MEHMO syndrome, is a rare X-linked syndrome recently linked to the EIF2S3 gene mutations. MEHMO is characterized by Mental retardation, Epilepsy, Hypogonadism/hypogenitalism, Microcephaly, and Obesity. Moreover, patients with MEHMO had also diabetes and endocrine phenotype, but detailed information is missing. We aimed to provide more details on the endocrine phenotype in two previously reported male probands with MEHMO carrying a frame-shift mutation (I465fs) in the EIF2S3 gene...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29303604/study-on-effects-of-electrical-stimulation-on-rabbit-esophageal-body-motility-in-vivo
#11
Lili Zhang, Wei Zhao, Chunshan Zhao, Hong Jin, Bin Wang, Bangmao Wang
Electric stimulation (ES) could induce contraction of intestinal smooth muscle. The aim of this study was to analyze the effects of ES on esophageal motility and the underlying mechanism in vivo. Twenty-eight rabbits were equipped with a pair of subserosa electrodes (connected to an electrical stimulator) in the lower segment of the esophagus. The ES signal consisted of bipolar rectangular pulse trains, lasting for 3.0s, with different amplitudes (1mA, 3mA, 5mA and 10mA), and frequencies (10Hz, 20Hz and 50Hz)...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29303603/sleep-apnoea-in-patients-with-nocturnal-hypertension-a-multicentre-study-in-the-czech-republic
#12
M Hobzova, K Sonka, M Pretl, J Vaclavik, E Kriegova, M Radvansky, J Zapletalova, M Plackova, V Kolek
Sleep apnoea (SA) is common in patients with hypertension. Nowadays, limited data on the prevalence of SA in nocturnal hypertension (NH) exist. We, therefore, studied the occurrence of SA in Czech patients and its association with 24-hour ambulatory blood pressure monitoring (ABPM), breathing disturbances in sleep, anthropometric data, Mallampati score and Epworth sleepiness scale (ESS) using the Apnea Link device. Undiagnosed SA was found in 72.9% patients (29.3% mild, 26.6% moderate, 17.0% severe) of 188 patients with NH measured by ABPM...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29303602/melatonin-attenuates-chronic-cough-mediated-by-oxidative-stress-via-transient-receptor-potential-melastatin-2-in-guinea-pigs-exposed-to-particulate-matter-2-5
#13
Zhenjun Ji, Zhen Wang, Zhe Chen, Hao Jin, Chen Chen, Senlin Chai, Haining Lv, Ling Yang, Yakun Hu, Rong Dong, Kefang Lai
The aim of this study was to investigate the effects of melatonin on oxidative stress, the expression of transient receptor potential melastatin-2 (TRPM2) in guinea pig brains, and the influence of melatonin on oxidative stress in lungs and airway inflammation induced by particulate matter 2.5 (PM2.5). A particle suspension (0.1 g/ml) was nasally administered to the guinea pigs to prepare a PM2.5 exposure model. Cough frequency and cough incubation period were determined through RM6240B biological signal collection and disposal system...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29303601/the-effect-of-adrenalectomy-on-exercise-response-of-the-renin-angiotensin-aldosterone-system-and-exercise-tolerance-in-primary-aldosteronism
#14
V Tuka, M Matoulek, J Rosa, O Petrák, O Mikeš, Z Krátká, B Štrauch, R Holaj, T Zelinka, J Widimský
Primary aldosteronism (PA) is associated with objectively measured lower physical fitness and blunted response of the renin-angiotensin-aldosterone system to exercise. The purpose of this pilot study was to objectively measure exercise response of the renin-angiotensin-aldosterone system and cardiopulmonary fitness changes after laparoscopic adrenalectomy (ADE) in patients with unilateral PA. We examined a total of 14 patients with confirmed PA before and after ADE, by means of spiroergometry and hormonal evaluation...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29303600/aquaporin-expression-in-the-fetal-porcine-urinary-tract-changes-during-gestation
#15
L K Jakobsen, K Trelborg, P S Kingo, S Hoyer, K-E Andersson, J C Djurhuus, R Norregaard, L H Olsen
The expression of aquaporins (AQPs) in the fetal porcine urinary tract and its relation to gestational age has not been established. Tissue samples from the renal pelvis, ureter, bladder and urethra were obtained from porcine fetuses. Samples were examined by RT-PCR (AQPs 1-11), QPCR (AQPs positive on RT-PCR), and immunohistochemistry. Bladder samples were additionally examined by Western blotting. RNA was extracted from 76 tissue samples obtained from 19 fetuses. Gestational age was 60 (n=11) or 100 days (n=8)...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29303599/proteomic-analysis-of-peroxynitrite-induced-protein-nitration-in-isolated-beef-heart-mitochondria
#16
M Kohutiar, A Eckhardt, I Mikšík, P Šantorová, J Wilhelm
Mitochondria are exposed to reactive nitrogen species under physiological conditions and even more under several pathologic states. In order to reveal the mechanism of these processes we studied the effects of peroxynitrite on isolated beef heart mitochondria in vitro. Peroxynitrite has the potential to nitrate protein tyrosine moieties, break the peptide bond, and eventually release the membrane proteins into the solution. All these effects were found in our experiments. Mitochondrial proteins were resolved by 2D electrophoresis and the protein nitration was detected by immunochemical methods and by nano LC-MS/MS...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29303598/endolymph-composition-paradigm-or-inevitability
#17
H Gagov, M Chichova, M Mladenov
This review is focused on the unusual composition of the endolymph of the inner ear and its function in mechanoelectrical transduction. The role of K(+) and Ca(2+) in excitatory influx, the very low Na(+), Ca(2+) and Mg(2+) concentrations of endolymph, stereocilia structure of hair cells and some proteins involved in mechanosensory signal transduction with emphasis on auditory receptors are presented and analyzed in more details. An alternative hypothetical model of ciliary structure and endolymph with a 'normal' composition is discussed...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29137486/the-arteriolar-glycocalyx-plays-a-role-in-the-regulation-of-blood-flow-in-the-iliac-of-the-anaesthetised-pig
#18
T Ruane-O'Hora, F Markos
The role of the glycocalyx of arterial resistance vessels in regulating blood flow in vivo is not fully understood. Therefore, the effect of glycocalyx damage using two separate compounds, hyaluronidase and N-Formylmethionyl-leucyl-phenylalanine (fMLP), was evaluated in the iliac artery vascular bed of the anaesthetised pig. Blood flow and pressure were measured in the iliac, an adjustable snare was applied to the iliac above the pressure and flow measurement site to induce step decreases (3 occlusions at 3-4 min intervals were performed for each infusion) in blood flow, and hence iliac pressure, and vascular conductance (flow / pressure) was calculated...
November 10, 2017: Physiological Research
https://www.readbyqxmd.com/read/29137485/heat-stress-prevents-the-decrease-in-succinate-dehydrogenase-activity-in-the-extensor-digitorum-longus-of-streptozotocin-induced-diabetic-rats
#19
K Nonaka, S Une, M Komatsu, R Yamaji, J Akiyama
This study aimed to investigate whether heat stress (HS) prevents a decrease in succinate dehydrogenase (SDH) activity and heat shock protein 60 (HSP60) and superoxide dismutase 2 (SOD2) contents in the extensor digitorum longus of streptozotocin (STZ)-induced diabetic rats. Twelve-week-old male Wistar rats were assigned to one of the four groups (n=6/group): control (Con), HS, diabetes mellitus (DM), and diabetes mellitus and heat stress (DM+HS). Diabetes was induced by the administration of STZ (50 mg/kg)...
November 10, 2017: Physiological Research
https://www.readbyqxmd.com/read/29137484/the-role-of-endogenous-reactive-oxygen-species-in-cardiac-myocyte-autophagy
#20
J-P Wang, R-F Chi, J Liu, Y-Z Deng, X-B Han, F-Z Qin, B Li
Autophagy is implicated in the maintenance of cardiac homeostasis. Autophagy is activated in heart failure, in which reactive oxygen species (ROS) are increased. Exogenous ROS have been shown to induce cardiomyocyte autophagy alterations. However, little is known about the influences of physiological levels of endogenous ROS on cardiomyocyte autophagy. In the present study, we tested the hypothesis that endogenous ROS in cardiomyocytes play an important role in inducing autophagy. Cultured H9C2 cardiomyocytes or Sprague-Dawley rats were treated with the antioxidant N-acetyl-cysteine (NAC) or the superoxide dismutase mimic tempol under the basal or nutrient deprivation conditions...
November 10, 2017: Physiological Research
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