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Biomedical subjects

E Levin

Publications and source records attributed to E Levin.

At least 91 records · Page 5Linked to original sources
PubMed1976

[Treatment of depressive and anxiety neurosis with a new psychotropic drug: Nomifensin].

The effect of Nomifensin (Hoechst 36984), a new psychotropic agent different from tricyclics and MAO inhibitors, was studied in patients with depressive-anxiety syndromes. Thirty three patients (22 female, 11 male), average age 40 years, were studied for five weeks in an open trial. The educational and occupational levels of the samples were determined. Follow-up was carried out with Wittenborn Psychiatric Rating Scale, Hamilton Rating Scale for Depression, Zung Self-Rating Scale and PEN Personality Inventory. No other drug was allowed to be taken along with Nomifensin, except for a benzodiazepine derivate in case of disturbed sleep. The average dose was 67 mg/day. The changes in Hamilton and Zung Scales were statistically significant, after the first week of treatment with Nomifensin. Only the N Scale of the PEN showed a a before/after treatment significant difference. The r=0.63 correlation obtained between Zung and Hamilton Scales is discussed. The drug showed to have thymoleptic action within the first week of treatment and an additional on the anxiety symptoms, frequently associated to reactive depressions.

Adolescent↗
PubMed1974

Lactic acid translocation: terminal step in glycolysis by Streptococcus faecalis.

Streptococcus faecalis obtains metabolic energy chiefly from the conversion of glucose to lactic acid; the present experiments deal with the mechanism of lactic acid translocation across the cytoplasmic membrane. Efflux of [(14)C]lactate from preloaded cells was accelerated by raising the external pH, and also by the ionophores nigericin and valinomycin. These results suggest that lactate leaves the cell by an electroneutral process, presumably as lactic acid. Further evidence was obtained by studying the entry of [(14)C]lactate into nonmetabolizing cells. It appears that the membrane is essentially impermeable to the lactate anion, but allows passage of lactic acid. The most persuasive evidence is that, upon establishment of a pH gradient such that the cytoplasm was alkaline, l-[(14)C]lactate accumulated in the cells against the concentration gradient. Accumulation was transient, and dissipated in parallel with the collapse of the pH gradient. The concentration gradient attained at the peak was a function of the pH difference. Ionophores which are known to collapse a pH gradient, such as nigericin and valinomycin, abolished accumulation of l-lactate. We infer that lactic acid translocation, whether into the cells or outward, is an electroneutral process and for that reason the distribution of lactic acid across the membrane is a function of the pH of cytoplasm and medium. The specificity of translocation and its kinetic parameters suggest that it is mediated by a carrier of low specificity.

Carbon Radioisotopes↗