Abstract：
:The effects of ryanodine on negative force staircase and potentiated rested-state contraction (RC) in rat myocardium were compared to the action of Ca release stimulator (caffeine) and inhibitors (local anesthetics). Only low ryanodine concentrations (0.1-0.5 mumol/l) were found to reverse anomalous mechanical patterns in rat myocardium to similar to those as generally observed in other mammalian species. Ryanodine-induced positive staircase and a weak RC were potentiated by noradrenaline. The results obtained seem to characterize ryanodine as a Ca2+ release stimulator rather than an inhibitor in this species and suggest different molecular substrates for ryanodine and caffeine inotropy in rat myocardium.
journal_name
Gen Physiol Biophysjournal_title
General physiology and biophysicsauthors
Saxon ME,Kobrinski EMsubject
Has Abstractpub_date
1988-02-01 00:00:00pages
39-49issue
1eissn
0231-5882issn
1338-4325journal_volume
7pub_type
杂志文章abstract：:The human pituitary tumor-transforming gene-1 (hPTTG1) has been found to be overexpressed in various cancers. Accumulated evidences implicate that some of protein kinases can specifically recognize two PXXP motifs at hPTTG1 C-terminus through their Src homology (SH3) domain and then phosphorylate the protein by their ...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2016035
更新日期：2017-01-01 00:00:00
abstract：:Ischemic/reperfusion brain injury (IRI) is a very severe event with the multiple etiopathogenesis. Ischemic preconditioning (IPC) is an important phenomenon of adaptation of CNS to subsequent ischemia. An altered cross-talk between intracellular calcium stores is presumed in the mechanisms of ischemic damage/protectio...
journal_title：General physiology and biophysics
pub_type： 杂志文章,评审
doi：
更新日期：2009-01-01 00:00:00
abstract：:The character of structural changes in thylakoid membranes caused by temperature variation was investigated. Experiments were performed on maize leaf segments in vivo and in a closed temperature cycle 24-50-24 degrees C. Two biophysical methods were used for detection: luminescence and EPR. Arrhenius plots of delayed ...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1993-02-01 00:00:00
abstract：:The hormone leptin, by binding to hypothalamic receptors, suppresses food intake and decreases body adiposity. Leptin receptors are also widely expressed in extra-hypothalamic areas such as hippocampus, amygdala and cerebellum, where leptin modulates synaptic transmission. Here we show that a defective leptin receptor...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2013056
更新日期：2014-01-01 00:00:00
abstract：:The role of viscosity in coupling between chemical reaction (complex formation) and diffusion in membranes has been investigated. The Fick law was replaced by the momentum balance equation with the viscous term. The irreversible thermodynamics admits coupling of the chemical reaction rate with the gradient of velocity...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1984-04-01 00:00:00
abstract：:The left and right ventricles fulfill different role in heart function. Here we compare chamber specific changes in local catecholamine concentrations; gene expression and the receptor protein amount of all three β-adrenoceptors (β-AR) in rat right heart ventricles exposed to acute (1 session) and repeated (7 sessions...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2014002
更新日期：2014-01-01 00:00:00
abstract：:Thermal inactivation of peroxidase (POD) in an extract of Picea omorika (Pancić) Purkyne needles initiated by heat treatment was studied. This is the first study of this kind on a conifer species. Non-linear regression analysis was applied on the inactivation rate data, combining Mitscherlich and Arrhenius equations, ...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2009_01_78
更新日期：2009-03-01 00:00:00
abstract：:In the present work have been made some modifications of Münch's model, which concerns the explanation of biophysical bases of the problem of transport of water and assimilates. Then, by using the thermodynamic formalism of Kedem and Katchalsky (1958), we have made a mathematical description of the model. On this basi...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1994-02-01 00:00:00
abstract：:The purpose of this study was to evaluate the effect of resveratrol on cytogenetic damages of iododeoxyuridine (IUdR) and x-ray megavoltage radiation (6 MV) in spheroid model of U87MG glioblastoma cancer cell line using clonogenic and alkaline comet assay. Cells were cultured as spheroids (350 µm) that were treated wi...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2014023
更新日期：2015-01-01 00:00:00
abstract：:The role of vascular endothelial growth factor (VEGF) in chronic stress and neurodevelopmental disorders is of growing research interest. Here we show that post-weaning isolation rearing of rats decreased gene expression of VEGF in the hippocampus. Gene expression of VEGF upstream regulator fibroblast growth factor-2 ...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2019019
更新日期：2019-07-01 00:00:00
abstract：:Glucagon-like peptide-1 (GLP-1) is an incretin hormone secreted from intestinal L cells upon nutrients ingestion, and is currently used for treating diabetes mellitus. It plays an important role in receptor modulation and cross talk with insulin at the coronary endothelium (CE) and cardiomyocytes (CM) in diabetic type...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2011_01_34
更新日期：2011-03-01 00:00:00
abstract：:Fractal analysis was applied to images of photochemical lignin polymer obtained using scanning tunneling microscope. We studied the polymer obtained in vitro by ionic mechanism through UV radiation--induced polymerization. The analysis showed the regularity of the lignin-like polymer at different levels of organizatio...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：2001-03-01 00:00:00
abstract：:Stationary and time-dependent fluorescence were measured for a donor/ acceptor (DA) pair bound to membrane proteins of bovine erythrocyte ghosts. The donor N-(p-(2-benzoxazolyl)phenyl)-maleimide (BMI) and the acceptor fluram bind to SH- and NH2-residues, respectively. The fluorescence spectra and the time-dependent em...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1997-03-01 00:00:00
abstract：:A possible mechanism is put forward to explain the sliding of thin filaments during muscle contraction. In our model, repulsion due to electrostatic forces is the mechanism which triggers crossbridges to cause the thin filaments to slide. The mechanism proposed could operate regardless of whether the myosin heads rota...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1996-12-01 00:00:00
abstract：:The polyamines spermine and spermidine and the diamine putrescine inhibit lipid peroxidation in phospholipid liposome suspensions and rat liver homogenates. Using the chemiluminescence technique the antioxidant activity of polyamines was found to be due to reactions with the free radical intermediates of lipid peroxid...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1992-04-01 00:00:00
abstract：:Hyperglycemia impairs oxidative capacity in skeletal muscle. Muscle oxidative capacity is regulated by peroxisome proliferator-activated receptor-γ co-activator-1α (PGC-1α). Transcutaneous carbon dioxide (CO2) enhances PGC-1α expression in skeletal muscle. Therefore, the aim of this study was to clarify the effects of...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2018048
更新日期：2019-05-01 00:00:00
abstract：:Two types of electrocardiographic data series were investigated using appropriate tests based on a selection of semi-quantitative analysis algorithms. Distribution histograms, power spectra, auto-correlation functions, state-space portraits, Lyapunov exponents and wavelet transformations were applied to electrocardiog...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：2006-06-01 00:00:00
abstract：:The existence of a high-conductance voltage sensitive chloride channel in BC3H1 myoblasts is documented. The conductance of the channel in symmetrical 150 mmol/l sodium chloride is around 400 pS. The probability of the channel being in the open state decreases with increasing of the imposed voltage from holding potent...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1993-04-01 00:00:00
abstract：:A new theory termed "tunnel-acid-group-potential" (TAGPT), explaining the effect of pHo and pH(i) on ion conductance through different membrane channels, is presented. It is suggested that shifts in pHo and pH(i) lead to changes in values of negative charges generated by acid groups of side chains of some polar (Glu-,...
journal_title：General physiology and biophysics
pub_type： 杂志文章,评审
doi：
更新日期：1996-10-01 00:00:00
abstract：:Homocysteine (Hcys) may be implicated in different diseases, especially in cardiovascular illnesses. The most reactive form of Hcys is its cyclic thioester-homocysteine thiolactone (HTL), which is formed in plasma and represents up to 0.29% of plasma total Hcys. Recently, it has been observed that Hcys and HTL may mod...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2010_02_186
更新日期：2010-06-01 00:00:00
abstract：:Culturing the fresh-water alga Hydrodictyon reticulatum for 9 days in the presence of 0.2 and 0.4 mmol/l Ba2+ increases the membrane potential about twice and the plasmalemma resistance 5-10 times without having any significant effect on the cell contents of water and Na+, K+ and Cl- ions. While in control cells the m...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1996-04-01 00:00:00
abstract：:Phosphorylation of P-glycoprotein (PGP) by some protein kinases may play an important role in the regulation of its drug transport activity, and may also be important for the development of multidrug resistance (MDR) phenotype. In the present study we investigated the expression of three groups of mitogen-activated pr...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1999-03-01 00:00:00
abstract：:The effect of melatonin on reperfusion arrhythmias and postischemic contractile dysfunction was studied in the isolated rat heart. 25 min global ischemia was induced and followed by 30 min of reperfusion. Melatonin (10 micromol/l) was present in the perfusion solution during the whole experiment. Experiment revealed p...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：2005-09-01 00:00:00
abstract：:Currents through DPI 201-106 modified single cardiac sodium channels in guinea pig ventricular cells were measured using the patch clamp technique in the cell-free configuration to control the sodium concentrations on both sides of the patch membrane. Current-voltage relationships of the single channels were obtained ...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1991-02-01 00:00:00
abstract：:Arachidonic, linolenic and linoleic acids decreased the binding of the m-cholinergic antagonist [3H] QNB and did not affect the ratio of high to low affinity binding sites to the agonist carbamoylcholine in rat brain synaptic membranes. In the presence of arachidonic acid, SH-reagent N-ethylmaleimide acquired the abil...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1986-06-01 00:00:00
abstract：:Malate dehydrogenases (MDH, L-malate:NAD oxidoreductase, EC 1.1.1.37), catalyze the NAD/NADH-dependent interconversion of the substrates malate and oxaloacetate. This reaction plays a key part in the malate/aspartate shuttle across the mitochondrial membrane, and in the tricarboxylic acid cycle within the mitochondria...
journal_title：General physiology and biophysics
pub_type： 杂志文章,评审
doi：
更新日期：2002-09-01 00:00:00
abstract：:The aim of this paper was to study the protein remodelling of the left ventricle following repeated administration of either daunorubicin (DNR) or DNR in combination with the cardioprotective agent dexrazoxane (DXZ). The experiment was carried out on three groups of Chinchilla male rabbits: 1. DNR (3 mg/kg i.v.), 2. D...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：2003-09-01 00:00:00
abstract：:Sodium nitroprusside (SNP) is a nitric oxide (•NO) donor in vitro and in vivo. In this paper the time variation of the intracellular water proton nuclear magnetic resonance (NMR) effective relaxation time T'(2a) in SNP-treated human erythrocyte suspensions, containing 10 mM membrane impermeable paramagnetic MnCl2, has...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2010_04_373
更新日期：2010-12-01 00:00:00
abstract：:A model for the dynamics of quasi-1D lipid structures in biological membranes is proposed. The model takes into account interactions between the lipid heads and hydro-carbon chains, the description of their relaxation dynamics being based on the phenomenological Ginzburg-Landau approach. It is shown that in lateral li...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1997-12-01 00:00:00
abstract：:This study was designed to investigate the possible effectiveness of chronic resveratrol administration on redox state, inflammatory mediators and apoptosis rate in diabetic rats. Male Wistar rats were divided into four groups (n = 6): normal control, diabetic control, normal rats treated with resveratrol, and diabeti...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2012_039
更新日期：2012-12-01 00:00:00
