Abstract
The influence of glucagone on the growth of « in vitro » explants from chick embryo heart has been studied by « roller-tubes » technique. Aim of the present paper is the identification of an eventual promoting action of glucagone on growth. The « in vitro » growth was evaluated by micrometric determination of the explants migration area in a 4 days old culture. Glucagone in concentration 1/1 100 000 was observed to be inactive; in concentration 1/200 000 it exerted a growth activation of the 28,65 per cent and in concentration 1/100 000 an activation of the 44,15 per cent. A certain parallelism may be found with « in vivo » observations according to which glucagone would represent a mediation of the somatotropic hormone effects.
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