Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0040822 (tremor)
 18,428 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Administration of 10 mg/kg TRH to mice was found to reduce the sleep and hypothermia induced by 4.7 g/kg ethanol. However, TRH did not reduce the sleep of mice that were given gamma-hydroxybutyric acid (GHBA), baclophen, or aminooxyacetic acid (AOAA) in combination with 3 g/kg/ ethanol. TRH also failed to reverse the hypothermia induced by the combination of ethanol and baclophen or GHBA, and the characteristic neurological effects of TRH e.g. tremor, increased muscle tone, and increased respiratory rate were reduced. In addition, TRH-induced locomotor stimulation was prevented by pretreatment with small doses of the GABA-ergic agents, and while 30 mg/kg TRH reduced the hypothermia produced by large doses of the GABA-ergic drugs, it did not antagonize the locomotor retardation produced by baclophen or GHBA. A hypothesis that the analeptic effects of TRH may be medicated via an inhibition of GABA systems is discussed.
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PMID:Antagonism of the analeptic activity of thyrotropin-releasing hormone (TRH) by agents which enhance GABA transmission. 1 50

The kinetics of growth of the Candida utilis chemostat culture 1668-3-37 was studied in a synthetic medium with ethanol at different values of pH and temperature. Chemostat curves were obtained for the pH of the medium of 4.5 and 3.0 and the temperature of 32 degrees C. The following growth characteristics were determined: the maximal growth rate (mumax), the economical coefficient (Y), the substrate (saturation) constant (Ks), the rate of ethanol uptake (q), maintenance energy (m). The minimal amount of ethanol inhibiting the yeast growth was assayed in short-term experiments under periodic conditions with shaking. The value of mumax was 0.35 hr-1 when the yeast was cultivated at 32 degrees C and the pH 4.5, and 0.32 hr-1 at the pH 3.0. The value of Ks varied by an order of magnitude at different pH values when the chemostat culture was grown at D=0.2 hr-1: 36.0 mg/litre at the pH of 3.0 and 3.75 mg/litre at the pH of 4.5. The value of m was close to 0 at the pH of 4.5 and equaled 5--7 mg of ethanol per gram of dry biomass per hour at the pH of 3.0; it was still higher when the temperature of cultivation was increased to 38 degrees C. The minimal substrate (ethanol) concentration inhibiting the yeast growth was constant at different cultivation conditions (pH 3.0 or 4.5 and temperature 32 or 38 degrees C), being equal to 0.45% (v/v) of ethanol.
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PMID:[Principle growth indices of a chemostat Candida utilis culture resistant to acid pH values]. 3 80

Chronic bipolar electrodes were implanted in cortical, limbic, diencephalic and mesencephalic regions of the rat. Following recovery from surgery the rats were maintained for 14--26 days on a liquid diet in which 35--42% of total calories were provided by ethanol. Following ethanol withdrawal, electrographic and behavioral monitoring was continued for 8--10 h. The withdrawal of ethanol resulted in the time-dependent appearance of a variety of withdrawal signs including tail arching, ataxia, rigidity, tremor and spontaneous and audiogenic convulsions. These behavioral signs were accompanied by the development of epileptiform abnormalities across wide-spread brain regions. Analysis of preconvulsive spike activity revealed a greater spike frequency in limbic, mesencephalic and non-specific diencephalic regions, as compared to those in cortex and specific diencephalon. Seizure discharge during the tonic-clonic phase of the primary audiogenic convulsion was initiated in the mesencephalon or amygdala, but spread rather extensively to the remainder of the brain. In those instances, however, where multiple convulsions occurred following the audiogenic convulsions, there was a marked decline in spread of seizure discharge to the cortex. These results were interpreted to support the notion that some degree of neuroanatomical specificity exists in the genesis of epileptiform abnormalities during ethanol withdrawal. A comparison of these results with those studying the neural mechanisms underlying other forms of generalized epilepsy was made. It is hypothesized that central pacemaking regions such as medial thalamus or reticular formation may serve to organize isolated epileptiform activity into coherent patterns of paroxysmal activity throughout the brain during the ethanol withdrawal syndrome.
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PMID:Ethanol dependence in the rat: role of non-specific and limbic regions in the withdrawal reaction. 8 50

The efficacy of lithium carbonate was studied in 18 chronic alcoholic male patients in withdrawal. In mild alcoholic withdrawal, oral lithium carbonate, 0.3 gm every 8 hr, diminishes subjective symptoms of withdrawal and normalizes performance on a motor tracking task. Patients who start lithium while drinking ethanol improve most probably because it takes longer than 3 days for lithium concentrations in the blood to plateau. Lithium does not importantly alter patterns of catecholamine excretion, blood pressures, heart rate, serum cyclic-adenosine monophosphate (AMP), serum dopamine beta-hydroxylase (DBH), sleep pattern, or tremor amplitude during withdrawal.
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PMID:Lithium treatment during alcoholic withdrawal. 18 Nov 93

The activity of fructose-1,6-bisphosphatase (FBP), a gluconeogenic enzyme, was determined in wild-type Saccharomyces cerevisiae X2180 grown in the presence of the glycolytic carbon sources, glucose, fructose, and galactose. The activities of phosphofructokinase (PFK), a glycolytic enzyme, and phosphoglucose isomerase (PGI), an enzyme functioning both in glycolysis and gluconeogenesis, were determined for purposes of comparison. A measurable amount of FBP activity was present in 20-h-old cells grown with moderate shaking in 1% glucose-nutrient or minimal medium. This activity increased significantly in 40 and 60-h-old cells. Similar levels of FBP activity were also present in 20-, 40-, and 60-h-old cells grown in 1% fructose-nutrient medium. A higher level of FBP activity was present in 20-h-old cells grown in 1% galactose-nutrient medium than in 20-h-old cells grown in 1% glucose- or fructose-nutrient medium. The FBP activity in glucose- or fructose-grown cells was higher than the corresponding activity in cells grown under similar conditions for 40 and 60 h in the presence of ethanol, a gluconeogenic carbon source. The PFK activity was significantly less in galactose- and ethanol-grown cells. The PGI activity was relatively constant in 20-, 40-, and 60-h-old cells grown in the presence of glucose, fructose, and galactose, but this activity was reduced approximately 50% in ethanol-grown cells. It is concluded from these results that, depending upon the concentration of carbon source and the time of incubation, FBP, a strictly gloconeogenic enzyme, is synthesized by S. cerevisiae grown in the presence of glycolytic carbon sources.
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PMID:Gluconeogenesis in Saccharomyces cerevisiae: determination of fructose-1,6-bisphosphatase activity in cells grown in the presence of glycolytic carbon sources. 19 Feb 13

1. Soy-peptone has been fractionated to yield a series of increasingly purified components which sharply increase the populations of Caenorhabditis briggsae and Caenorhabditis elegans when added to the basal medium. The nutritionally active material appears to be a small polypeptide. 2. C. briggsae and C. elegans routinely reach populations of 150,000/ml or greater in 9 days in still culture, starting from an inoculum of only 500 organisms per ml. C. elegans is particularly sensitive to the depth of the medium. However, large populations can be achieved in deep cultures if continuous shaking is carried out. 3. Panagrellus silusiae shows improved populations if the basal medium is supplemented with the nutritional factor from soy-peptone. However, 0.5% acetic acid or 1% ethanol added to the medium serves equally well. There is no additive effect of ethanol and the factor.
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PMID:Nutritional factors and conditions for the axenic culture of free-living nematodes. 31 68

The magnitude of the ethanol withdrawal reaction was assessed in rhesus monkeys (Macaca mulatta) following 96 hours of either constant or systematically fluctuating blood ethanol concentrations (BEC) using both physiological tremor and scores on a behavioral checklist as dependent measures. Although specific BEC (50, 100, 200 or 300 mg/dl) were not reliably related to changes in mean frequency of tremor, this measure was a statistically significant curvilinear function of time as measured before and after zero BEC during the withdrawal period. Further, scores from the behavioral checklist demonstrated a dose-response relationship with respect to BEC. The data also suggest that systematically fluctuating BEC are associated with less severe withdrawal reactions when compared with appropriate data from the constant BEC condition.
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PMID:Alcohol withdrawal reactions in rhesus monkeys. 41 38

The ethanol withdrawal syndrome in man and animals is characterized by signs of CNS hyperactivity although a direct measurement of a physiological variable reflecting this CNS hyperactivity has never been performed in untreated man or in animals. We induced ethanol dependence in the rat by means of intragastric intubation with a 20% w/v ethanol solution, thus keeping the animals in a state of continuous severe intoxication for 3--4 days; during the subsequent state of withdrawal characterized by tremor, rigidity, stereotyped movements and general seizures a 25% increase in cerebral oxygen consumption (CMRO2) could be measured; this increase was not due to catecholamines originating from adrenal medulla as adrenomedullectomized animals showed a similar increase in CMRO2 (28%); the withdrawing animals showed a corresponding cerebral blood flow (CBF) increase. The elevated CMRO2 and CBF could be reduced to normal by administration of a beta-adrenergic receptor blocker (propranolol 2 mg/kg i.v.), and hence the increased CMRO2 during ethanol withdrawal could be related to catecholaminergic systems in the brain, e.g. the noradrenergic locus coeruleus system which is anatomically well suited as a general activating system. This interpretation is supported by the earlier neurochemical finding of an increased cerebral noradrenaline turnover during ethanol withdrawal. The exact mechanism underlying the increased cerebral oxygen consumption during ethanol withdrawal and the effect of propranolol on cerebral function during this condition remains to be clarified.
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PMID:Cerebral blood flow and oxygen consumption during ethanol withdrawal in the rat. 57 52

An assay has been developed and evaluated that quantifies the surface tension lowering ability of amniotic fluid surfactant. The formation of stable foam following vigorous shaking of amniotic fluid was evaluated by the addition of various amounts of dipalmitoyl lecithin in a solution of ethanol and saline and by fine adjustments of the ethanol volume fraction in the final assay mixture. The foam stability index (FSI) for a particular sample of amniotic fluid was defined as the highest ethanol volume fraction that would permit the formation of stable foam after vigorously shaking a mixture of ethanol and amniotic fluid. The assay is referred to as the FSI test. We report the FSI values in amniotic fluid specimens from 59 patients obtained within 72 hours of delivery. The L/S ratio was measured in 50 of the same 59 specimens. We observed 6 cases of neonatal hyaline membrane disease (HMD) and 2 cases of transient tachypnea of the newborn (TTNB) in this study. No cases of HMD or TTNB occurred with FSI values of greater than 0.47, while 2 cases of HMD were recorded in association with L/S ratios of 2.5 and 2.8, respectively. The potential clinical value of the FSI test is discussed.
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PMID:Assessing fetal lung maturation by the foam stability index test. 58 10

We characterize two assays of total amniotic fluid surfactant that are based on function: the surface-tension lowering ability of extracts of amniotic fluid lipid (I) and the foam stability index test (II). I is determined on chloroform extracts of amniotic fluid. II is defined as the highest ethanol volume fraction of an amniotic fluid-ethanol mixture that will permit a stable foam to form after 30 s of vigorous shaking. The relationship of I to disaturated phosphatidylcholine concentrations (after osmium tetroxide treatment of the amniotic fluid lipid extract) is in the expected theoretical form of a hyperbolic function. The relation between values for II and disaturated phosphatidylcholine concentrations showed a consistent bias, suggesting that components other than disaturated phosphatidylcholine contribute to stable foam formation. Phosphatidylclycerol concentrations did not appear to account for this bias. The relation between I to II values suggest that both assays measure total surfactant. I, II, and concentration of disaturated phosphatidyl choline are all excellent indicators of fetal pulmonary maturity. From a practical standpoint, the foam stability index test is the most efficient approach to routine assessment of fetal pulmonary status.
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PMID:Evaluation of two assays of functional surfactant in amniotic fluid: surface-tension lowering ability and the foam stability index test. 58 78


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