Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0011570 (depression)
 172,036 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Substitution therapy with thiamine, ATP and magnesium which, just like that with clomethiazole has a parasympathomimetic action, is based on the principle of suppression of the sympathetic system. If these patients are no longer capable for any reason of continuing to take the endogenous substances (thiamine, ATP and magnesium) by mouth, the treatment is continued with clomethiazole an an infusion. But since the intravenous administration of clomethiazole is not seldom accompanied by a parasympathetic coma with respiratory and cardiac depression and miosis, treatment of a sympathetic blockade with dextrose solution containing salt is proposed.
 ...
PMID:[Therapy of alcoholism. The use of thiamine, ATP and magnesium and the control of clomethiazole sympathetic blockade (author's transl)]. 30 66

The effects of exogenously applied adenosine on the membrane potentials, currents and tension components of the bullfrog double sucrose-gap method. Adenosine above 10(-3)M produced a prolongation of action potential accompanied by a slight augmentation of contraction which was followed by a sustained depression. The recovery was slow. Under voltage clamp conditions, adenosine merely produced a negative inotropic effect depressing Ica-dependent and -independent tensions. In the membrane currents, Inaf, Is(Ica), Ix and background current (Ib) were all depressed. In the presence of adrenaline, the increased Is, Ix and contraction were inhibited by adenosine in a lower dose (10(-5) -10 (-3) M), and the inhibition of Is and Ica-dependent tension were more prominent in the presence of than in the absence of adrenaline. Under the effect of ATP, which has a catecholamine-like action, similar selective inhibitions were observed. It was concluded that adenosine has a sustained stabilizing action on the myocardium to survive, especially in the presence of adrenaline, by depressing the augmented Ica and contraction.
 ...
PMID:Stabilizing effects of adenosine on the membrane currents and tension components of the bullfrog atrium. 31 Sep 4

The effects of the ionophores A-23187 and X-537 A on glucose metabolism, ATP content and sucrose permeability in pancreatic islets microdissected from obese-hyperglycemic mice were studied. The formation of 14CO2 from 10 mM D-[U-14C] GLUCOSE WAS INHIBITED BY OMISSION OF Ca2+ from the medium. A-23187 (10 muM) induced a further decrease of 14CO2 formation whereas X-537 A (10 muM) had no effect. At 20 mM glucose both A-23187 (48 muM) and X-537 A (43 muM) decreased the 14CO2 formation in the absence of Ca2+ whereas only X-537 A inhibited in the presence of Ca2+. X-537 A (43 muM) also decreased the formation of 3H2O from 20 mM D-[5-3H] glucose. The islet content of ATP was not changed after incubation in media deficient in either Mg2+ or Ca2+. However, omission of both Mg2+ and Ca2+ resulted in about 50% decrease of the ATP content. A-23187 and X-537 A induced dose-dependent decreases of the islet ATP content. X-537 A was much more potent than A-23187. Both ionophores induced stronger depression of the ATP content when Ca2+ was omitted. X-537 A (43 muM) but not A-23187 (48 muM) increased the beta-cell membrane permeability as indicated by an increased sucrose space in relation to the urea space of islets. Such an effect was not obtained with X-537 A at 1 muM or by omission of Ca2+. It is suggested that the marked metabolic effects of the ionophores reflect an impaired mitochondrial metabolism. These metabolic changes should be considered in interpretations of ionophore action on insulin secretion.
 ...
PMID:Metabolic characteristics of pancreatic beta-cells exposed to calcium-transporting ionophores. 31 39

ATP-Mg++ (10 mumoles/100 g, iv) increased the LD50 for Salmonella enteritidis lipopolysaccharide (endotoxin) in male Holtzman rats (300 +/- 10 g) from 1.3 to 6.0 mg/rat. While endotoxin at 3 mg/rat iv 5 hr previously induced hypoglycemia to 12 +/- 4 mg/dl, ATP cotreatment blunted the hypoglycemia; i.e., plasma glucose values were 78 +/- 6 mg/dl. ATP treatment prevented the depression in gluconeogenesis induced by endotoxin as evaluated in vivo by the conversion of 14C-alanine to 14C-glucose. ATP treatment also reduced the hypercatabolism of U-14 C-glucose to 14CO2 in vivo and by epididymal fat pads in vitro. A role for ATP in preventing disruption of glucose homeostasis and development of endotoxin shock via counteracting insulin is suggested.
 ...
PMID:Protection against endotoxin shock and impaired glucose homeostasis with ATP. 33 38

42 cases of acute hepatitis diagnosed from 1970 to 1974 were reviewed retrospectively. The effect of (+)-Cyanidanol-3 on the course of acute hepatitis was controlled on 35 patients in a double blind study. During acute hepatitis, bed rest had an essential influence on the time needed to normalize the transaminases. Based on these observations, we proved the effect, that during treatment with (+)-Cyanidanol-3 the patients showed a positive influence regarding the time for normalization of the transaminases in contrast to the placebo-group. During the first weeks the depression of the transaminase-activity in the blood was noticeable. Because of the small number of patients in that group, this effect could not yet been proved statistically. The stimulation of ATP synthesis as the main therapeutic principle can show a favourable result in the treatment of acute hepatitis.
 ...
PMID:[Influence of (+)-cyanidanol-3 on acute hepatitis. Results of a double blind study (author's transl)]. 33 45

An "endoneurial" preparation from a rabbit tibial nerve fascicle was used to study the ability of peripheral nerve axons and Schwann cells to derive their composite energy requirements from glucose, D-beta-hydroxybutyrate, or albumin-bound palmitate, and the effects of insulin in vitro on their composite glucose utilization. Samples incubated with 5 mM glucose for 2 h maintained a stable O2 uptake and P-creatine and ATP concentrations, and they exhibited a slight increase in P-creatine/creatine ratio (the electron microscopic appearance of the preparation was previously shown to be unaltered under these conditions). The rate of glucose oxidation required to account for the O2 uptake accounted for 61% of the glucose uptake. In samples incubated without substrate for 2 h, a marked fall in tissue glucose was associated with a 50% decrease in O2 uptake and with decreases in P-creatine, ATP, and in the P-creatine/creating ratio. In medium lacking glucose but containing 5 mM DL-beta-hydroxybutyrate, a stable rate of D-beta-hydroxybutyrate uptake was observed, and acetoacetate production accounted for only a small fraction; significant decreases in O2 uptake or ATP were prevented, and, although P-creatinde and the P-creatine/creatine ratio fell, they remained significantly higher than after incubation without substrate. An efficient blood-nerve barrier to albumin is known to exist. Medium containing albumin-bound palmitate with molar ratios or palmitate/albumin of 1 or 2 (highest FFA concentration, 1.32 meq/L) failed to prevent decreases in P-creatine, ATP, and in the P-creatine/creatine ratio during incubations without glucose; the associated O2 uptakes suggested that the tissue is susceptible to respiratory uncoupling and depression son exposure to albumin-blund palmitate as compared with non-neural tissue. Insulin (100 or 1000 microU/ml) had no detectable effects on glucose utilization in the endoneurial preparation during 2-h incubations with 5 mM glucose or (U-14C) glucose. In contrast, in epineurial tissue from rabbit sciatic nerve, insulin (100 micronU/ml) increased (U-14C) glucose incorporation into CO2 and total lipid. The neural components of peripheral nerve are probably dependent on glucose as their major substrate for energy production and respiration under most physiologic conditions in which elevated plasma ketone body concentrations are absent; their composite glucose utilization is not subject to acute, direct regulation by insulin in concentrations that might reasonably be derived from plasma insulin of pancreatic origin.
 ...
PMID:In vitro studies of the substrates for energy production and the effects of insulin on glucose utilization in the neural components of peripheral nerve. 47 82

The purpose of this controlled clinical trial was to demonstrate possible correlations between changes in bioenergetic metabolism and psychotropic drug administration in the treatment of functional psychosis. The study included twenty-six patients, eleven with schizophrenia, three with chronic atypical depression and twelve with drug-resistant endogenous depressions. All patients were kept on continuous psychotropic medication for at least 3 weeks before starting the trial, and piracetam was given additionally in a fixed dosage of 2400 mg daily; the same number of identical capsules was given during the pre- and post-treatment placebo periods. Psycho-pathological evaluation of the patients was by the BPRS; clinical and biochemical data were evaluated statistically by the analysis of regression. The results show that in schizophrenic patients an improvement was observed in those cases who had improved biochemically, i.e. where the ATP values had increased. In drug-resistant depressions there was a rapid and significant clinical improvement after piracetam co-administration, and this went in step with a significant rise in ATP levels.
 ...
PMID:Biological correlates of piracetam clinical effects in psychotic patients. 48 20

Acute experiments on rats showed that the intragastric administration of an aqueous solution of N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) elicited depression of the electrical activity of the gastric wall manifested by a decrease in the amplitude and frequency of the basic electrical rhythm and by its complete stopping in most cases. MNNG abolished the excitatory reaction caused both by the vagal electric stimulation and administration of carbacholine, but there persists an inhibitory reaction elicited both by the vagal stimulation and infusion of ATP.
 ...
PMID:[Effect of a carcinogen on the electric activity of the rat stomach]. 49 85

The effect of verapamil on Ca2+ and Mg2+ accumulation was investigated in isolated rat kidney cortex mitochondria. For the 50% inhibition of Ca2+ accumulation, 2 x 10(-4) M verapamil concentration was required in the presence of ATP (2 mM) and phosphate (5 mM). Omission of phosphate from the medium increased the inhibitory effect of verapamil on Ca2+ accumulation. Verapamil had no effect on Ca2+ accumulation in the presence of both ATP and succinate (7.8 mM), but further addition of phosphate resulted in a significant inhibition of Ca2+ accumulation by verapamil. Mg2+ accumulation of mitochondria was similarly depressed by verapamil. The same tendency was found as for the modification of verapamil effect by acetate in mitochondrial Ca2+ and Mg2+ accumulation. Succinate oxidation of mitochondria was not affected by verapamil in the absence of phosphate, but was inhibited by verapamil in the presence of phosphate. Therefore, it seemed reasonable to assume that the depression of Ca2+ and Mg2+ transport of mitochondria by verapamil is modulated by permeant anions.
 ...
PMID:Effect of verapamil on the calcium and magnesium transports of rat kidney cortex mitochondria. 53 83

Exogenous ATP has been shown earlier to activate a permeability change in transformed 3T3 cultures leading to massive efflux of the acid-soluble pools. This leads to reduction of the basal rate of glycolysis to a very low level so that glycolysis becomes almost totally dependent on the addition to the medium of glucose, inorganic phosphate and ADP in order to restore the rate to that of untreated cells. No such depression of glycolysis is observed in untreated transformed cells or in ATP-treated normal 3T3 cells. In such permeabilized cultures, phosphorylated intermediates such as glucose-6-phosphate and fructose-1,6-diphosphate can serve as effective substrates for lactic acid formation. ATP treatment of cultured cells also allows molecules as big as NADP to enter the cells and participate in the pentose phosphate shunt pathway. This ability to temporarily and differentially render transformed cells permeable allows a review of several aspects of cellular metabolism and biosynthesis in the intact cell where the cellular organization is maintained. Furthermore, it deserves serious consideration as a means to achieve differential cytotoxicity of transformed cells by chemotherapeutic agents which, on their own, are indiscriminate in their action.
 ...
PMID:Control of glycolysis and the pentose phosphate shunt in transformed 3T3 cultures rendered permeable by ATP. 56 77


<< Previous 1 2 3 4 5 6 7 8 9 10 Next >>