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Biomedical subjects

M David

Publications and source records attributed to M David.

At least 703 records · Page 39Linked to original sources
PubMed1975

Stimulation of protein synthesis in cultured heart muscle cells by glucose.

Glucose stimulated the rate of incorporation of [3H]leucine into HCLO4-insoluble fraction of cultured rat heart muscle cells under both aerobic and anaerobic conditions. In the aerobic system the incorporation proceeded at a constant rate during 3h of incubation with and without glucose whereas in the anaeorbic system the incorporation ceased after approx. 60 min and could be renewed only by the addition of glucose. No correlation was found to exist between the above effect of glucose on protein synthesis and glucose-dependent changes in the intracellular ATP concentration. The extent of the stimulation of protein synthesis was related to the concentration of glucose. The effect of glucose was suppressed by cycloheximide but was not affected by actinomycin D. Glucose had no effect on the rate of transport of alpha-aminoisobutyric acid. Mannose also stimulated [3H]leucine incorporation. Substances that did not produce lactate were ineffective. Iodoacetate inhibited the stimulatory effect of glucose, but pyruvate, which by itself had no apprecialbe stimulatory action, relieved the inhibition induced by iodoacetate. There was no concomitant change in the concentration of ATP when iodoacetate inhibition was reversed by pyruvate. L-Lactate or other intermediates of energy metabolism could not relieve the inhibitory effect of iodoacetate.

Adenosine Triphosphate↗
PubMed1975

[2 cases of trisomy 11q(q23.2-- qter) with the same abnormality of external genitalia].

Two unrelated individuals are reported with the same clinical picture and trisomic for the same segment of chromosome 11 (q23 leads to qter). That both were seen because of micropenis raises the possibility that genes interfering with the reproductive function are located on chromosome 11 and that the q23 band might be a preferential breakage point of chromosome 11. Certain earlier reports support such a possibility.

Abnormalities, Multiple↗
PubMed1975

[Congenital adrenal hypoplasia of cytomegalic type. Recessive, sex-linked form. Apropos of 3 cases].

Three personal cases, and the cases of literature of congenital adrenal hypoplasia with cytomegaly allow an histological definition. Clinical and biological findings are described. In 2 cases, a diffused hypertrophy of the cells responsible for corticotrope or melanotrope secretion was discovered; it confirmed the peripheral adrenal origin of the condition, as well as high plasmatic level of ACTH, in the third case. Sex-bound cytomegalic adrenal hypoplasia is differenciated from other cortico-adrenal insufficiencies with cytomegaly.

Adrenal Cortex↗