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L Safta

Publications and source records attributed to L Safta.

At least 37 records · Page 2Linked to original sources
PubMedDate not supplied

Reflex and neuro-humoral pressor action of the hypertonic solutions.

The intraarterial injections of 50% urea or 20% NaCl induced a rise of the systemic arterial blood pressure simultaneously with a constriction of the vessels of the legs. The mechanism which is responsible for these phenomena is very complex. It includes a reflex arising from the arterial wall, which is mediated through the spinal cord, the release of catecholamines and of some still nonidentified pressor substances and a central component which is normally masked by the depressor sinus reflex.

Animals↗
PubMedDate not supplied

The effect of some enkephalins on calcitonin secretion.

Synthetic enkephalins: 5 metenkephalin, D2 proenkephalin and 5 leuenkephalin and morphine were injected into cerebral ventricles of rats. After 30 minutes the rats were sacrificed and the calcitonin content of the thyroid was assayed. As compared to the controls, morphine reduced significantly the secretion of calcitonin. Of the enkephalins, only 5 leuenkephalin had a borderline effect on calcitonin secretion, stimulating to a significant degree the rise of the hormone. The data obtained demonstrate the selective effect of opiates on calcitonin secretion.

Animals↗