Abstract：
:Existing literature provides an equivocal picture of the behavior of mitochondrial synthesis during the time course of cardiac hypertrophy. Therefore, we examined the effect of cardiac hypertrophy on mitochondrial cytochrome c oxidase (CYTOX) activity, the content of CYTOX subunit VIc mRNA, and the expression of molecular chaperones. Adult male Sprague-Dawley rats were subjected to either abdominal aortic constriction to induce pressure overload (PO) or a sham operation (SH). Animals were studied 2, 4, 7, 14, 21, or 28 days after surgery. Aortic constriction resulted in a significant evaluation in arterial pressure by 4 days after surgery. Significant (p < 0.05) hypertrophy was attained by 4 days and was stabilized at 37% between 7 and 28 days. CYTOX activity (U/g) did not differ significantly between PO and SH animals at either early (< 7 days) or later time points, indicating that mitochondrial content increased in proportion to adaptive cellular hypertrophic growth. The concentration of the molecular chaperones HSP60 and GRP75 involved in mitochondrial protein import did not change with PO treatment. The levels of mRNAs encoding both CYTOX subunit VIc and HSP60 remained constant, in proportion to cardiac growth. This suggests that the accelerated synthesis of CYTOX and HSP60 during cardiac hypertrophy is regulated transcriptionally. The data help to resolve the controversy in the literature regarding mitochondrial biogenesis during moderate, stable cardiac hypertrophy, and they indirectly indicate that proportional mitochondrial synthesis relative to cellular hypertrophy is regulated at the transcriptional level.
journal_name
Can J Physiol Pharmacoljournal_title
Canadian journal of physiology and pharmacologyauthors
Nishio ML,Ornatsky OI,Craig EE,Hood DAdoi
10.1139/y95-080subject
Has Abstractpub_date
1995-05-01 00:00:00pages
630-7issue
5eissn
0008-4212issn
1205-7541journal_volume
73pub_type
杂志文章abstract：:Local microinjections of harmaline evoked sustained rhythmic activity in the inferior olive of decerebrate cats. Harmaline appears to exert its action within restricted areas of the inferior olivary complex: the caudal halves of the dorsal and medial accessory nuclei. Since the highly synchronized activity generated b...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y75-116
更新日期：1975-10-01 00:00:00
abstract：:Sequestration of nitric oxide (NO) by subcellular fractions isolated from bovine pulmonary arterial medial layer (BPA) and rabbit platelets (RP) was studied utilizing a novel chemiluminescence--headspace gas technique. Sequestration in all fractions was similarly rapid (5 min) and remained constant for at least 30 min...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y93-142
更新日期：1993-12-01 00:00:00
abstract：:Alterations in calcium metabolism and calcium-regulating hormones have been described in essential hypertension. However, the mechanisms that mediate these responses are unknown. In previous studies, using the genetically spontaneously hypertensive rat and the mineralocorticoid-salt (DOC-salt) hypertensive rat model, ...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y95-136
更新日期：1995-07-01 00:00:00
abstract：:The direct effects of extrinsic nerve stimulation on coronary artery tone are unclear because of the complications arising from alterations in myocardial dynamics which themselves alter flow. An isolated and perfused nonbeating slab of beef ventricle was utilized in the present experiments to eliminate secondary compl...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y79-043
更新日期：1979-03-01 00:00:00
abstract：:Gemcitabine, a nucleoside analogue for treating lung cancer, is clinically administered as an intravenous infusion. To achieve better patient compliance and more direct effect on the lung, we explored a new gemcitabine pulmonary delivery route and evaluated the pharmacokinetics and acute lung injury aspects in animals...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y08-039
更新日期：2008-05-01 00:00:00
abstract：:Initially the impetus to develop iron (Fe) chelators for clinical use was based upon the need for a drug to treat Fe-overload diseases such as beta-thalassemia. However, it has become clear that Fe chelators may be useful for the treatment of a wide variety of disease states, including cancer, malaria, and free radica...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章,评审
doi：
更新日期：1997-10-01 00:00:00
abstract：:The effect of estrogen on the passive characteristics of arteries is not known. We hypothesized that estrogen would increase arterial distensibility as part of its protective effect on the vasculature. Female Sprague-Dawley rats were ovariectomized at 11 weeks of age. One group received a placebo (n = 6), while two ot...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/cjpp-77-1-75
更新日期：1999-01-01 00:00:00
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journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y94-150
更新日期：1994-09-01 00:00:00
abstract：:The effects of neomycin sulfate were examined upon the discharge activity and electrical membrane properties of an isolated invertebrate sensory neuron, the crayfish stretch receptor neuron. Neomycin depressed cell discharge activity in a concentration-dependent manner over the concentration range of 0.01-1.0 mM. Sign...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y88-005
更新日期：1988-01-01 00:00:00
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journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：
更新日期：1997-06-01 00:00:00
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journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y84-138
更新日期：1984-07-01 00:00:00
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journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章,评审
doi：10.1139/y90-039
更新日期：1990-02-01 00:00:00
abstract：:In addition to bronchial smooth muscle, histamine and other mediators act in bronchial asthma on the microcirculation of pulmonary connective tissue. The mediators induce enhanced blood flow, and by acting on the blood-tissue barrier, they induce increase in vasopermeability with edema and in more severe injury microh...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章,评审
doi：10.1139/y87-077
更新日期：1987-03-01 00:00:00
abstract：:The neural connections from the medial prefrontal cortex to the ventral pallidum were investigated in urethane-anesthetized rats. Extracellular recordings were made from 124 spontaneously firing neurons in the ventral pallidum while the medial prefrontal cortex was electrically stimulated. The most frequent response t...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y93-053
更新日期：1993-05-01 00:00:00
abstract：:Barbiturate actions on excitatory synaptic responses in CA 1 and dentate regions of hippocampal slices were studied to determine whether different effects occur on anatomically distinct synaptic pathways. Pentobarbital facilitated transmission between stratum radiatum inputs and CA 1 neurons at low concentrations (0.0...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y87-065
更新日期：1987-03-01 00:00:00
abstract：:The ability of dystrophic hamsters to maintain their body temperature despite abnormal muscle and brown adipose tissue, two organs involved in thermoregulation, was evaluated. Dystrophic hamsters (CHF 146) between the ages of 30 and 160 days kept at 21 degrees C had core (rectal) temperatures (TR) that were 0.5-1.5 de...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y85-187
更新日期：1985-09-01 00:00:00
abstract：:Endothelin 1 (ET-1) is a potent vasoconstrictor implicated in the control of blood pressure and renal function. Its effects can be modulated by nitric oxide (NO), which inhibits ET-1 production and action. Recently, we reported that ET-1 production can also be modulated by angiotensin II (AngII) in vivo. To investigat...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/cjpp-77-1-8
更新日期：1999-01-01 00:00:00
abstract：:Our objective was to investigate the effects of chronic excess iodine intake on thyroid functions and thyroid oxidative stress state in hypothyroid rats. Sixty rats were divided into euthyroid and hypothyroid (thiocyanate-induced) groups with or without administration of excess iodine (3000 or 6000 μg/L) for 8 weeks. ...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y2012-046
更新日期：2012-05-01 00:00:00
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journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章,评审
doi：10.1139/y94-207
更新日期：1994-11-01 00:00:00
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journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y95-005
更新日期：1995-01-01 00:00:00
abstract：:In vivo fatty acid synthesis and the pathways of glycerol-3-phosphate (G3P) production were investigated in brown adipose tissue (BAT) from rats fed a cafeteria diet for 3 weeks. In spite of BAT activation, the diet promoted an increase in the carcass fatty acid content. Plasma insulin levels were markedly increased i...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y08-052
更新日期：2008-07-01 00:00:00
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journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章,评审
doi：10.1139/y92-246
更新日期：1992-01-01 00:00:00
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journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/cjpp-2016-0133
更新日期：2017-04-01 00:00:00
abstract：:Glucose utilization and insulin and growth hormone responses were evaluated in eight obese women by three rapid intravenous glucose tolerance tests (IVGTT): during a control period, and after 1 and 3 weeks of a 750 kcal/day protein-lipid diet (1 kcal = 4.1855 kJ). Weight loss averaged 454 g/day during the 1st week and...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y82-044
更新日期：1982-03-01 00:00:00
abstract：:Fluctuations in the concentrations of cortisol and progesterone in fetal plasma, maternal plasma, and amniotic and allantoic fluids were measured in samples taken at 10-min intervals over a 90-min period from three groups of sheep sampled at different times during late pregnancy. During the last 30 days of gestation t...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y81-041
更新日期：1981-03-01 00:00:00
abstract：:G protein-coupled receptors (GPCRs), including endothelin receptor A (ETA) and B (ETB), may form dimers or higher-order oligomers that profoundly influence signaling. Here we examined a PDZ finger motif within the C-terminus of ETA and its role in heterodimerization with ETB, and in homodimerization with itself, when ...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/Y08-050
更新日期：2008-08-01 00:00:00
abstract：:For 10 days, dogs were fed a normal salt diet containing 70 mequiv. Na+/day (NSD) followed by a high salt diet containing 170 mequiv. Na+/day (HSD) or 240 mequiv. Na+/day (VHSD), or the order was reversed. K+ in these diets was fixed at 40 mequiv./day. The different diets did not influence the basal level of serum cat...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y80-164
更新日期：1980-09-01 00:00:00
abstract：:Alterations in electrical conductivity between smooth muscle cells (SMCs) can alter the spread and effectiveness of electromechanical SMC contraction. We attempted to determine whether alterations in pressure-dependent constriction (PDC) occurring in relation to stroke development within the middle cerebral arteries (...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：
更新日期：1998-02-01 00:00:00
abstract：:This study examined whether the effects of FK506-binding protein dissociation from sarcoplasmic reticulum (SR) Ca(2+) release channels on excitation-contraction (EC) coupling changed when SR Ca(2+) reuptake and (or) the trans-sarcolemmal Ca(2+) extrusion were altered. The steady-state twitch Ca(2+) transient (CaT), ce...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y05-020
更新日期：2005-04-01 00:00:00
abstract：:Xerostomia is a self-conscious symptom. High-mobility group box 1 (HMGB1) promotes pro-inflammatory effects in many diseases. This study aimed to clarify the role of HMGB1 in Sjögren syndrome (SS)-triggered xerostomia. Nonobese diabetic (NOD)/Ltj mice were used to establish an SS-triggered xerostomia model. The result...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/cjpp-2019-0337
更新日期：2020-06-01 00:00:00
