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Biomedical subjects

K Geisen

Publications and source records attributed to K Geisen.

33 records · Page 2Linked to original sources
PubMed1978

Studies on the effect of tolbutamide, glibenclamide, HB 699, and glucose on serum insulin and blood glucose in gastro-enterectomized dogs.

The influence of intravenously administered tolbutamide, glibenclamide, HB 699, and glucose on serum insulin and blood glucose kinetics was examined in 36 enterectomized dogs. The substances induced an immediate and long-lasting insulin release even in the absence of all insulinotropic intestinal mediators. Maximum and mean insulin concentrations after treatment, measured for 180 minutes, were markedly higher in resected dogs than in sham operated or non-operated animals. The data suggest that intestinal mediators might be of no importance in vivo for the insulin-releasing activity of the compounds examined, at least in dogs.

Animals↗
PubMed1976

[(A1-beta-Alanine) insulin].

Starting from porcine insulin, A1-glycine was substituted by beta-alanine. The blood sugar lowering effect of the new analogue in the rabbit is about 45% of that of insulin. The half-maximal binding to partially purified rat liver receptors is about 46%, to transformed human lymphocytes about 54%, compared to insulin.

Alanine↗
PubMed1975

[(A1-D-alanine) insulin (author's transl)].

Starting from porcine insulin, A1-glycine was substituted by D-alanine and by L-alanine for comparison. Replacement of A1-glycine by L-alanine revealed the known decrease in the biological activity. [A1-D-Alanine]insulin, however, has the same blood sugar lowering activity as insulin and is slightly more active in its influence on the glucose uptake into the rat diaphragm. The specific binding to insulin receptors of rat liver is decreased as, compared to insulin, but increased as compared to the L-alanine analogue.

Alanine↗