Autoradiographic study of3H-lysine uptake by superior cervical and stellate ganglia in prehypertensive spontaneously hypertensive rats

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Abstract
In order to compare the functional state of sympathetic ganglia in spontaneously hypertensive (SHR) with those in normotensive Wistar Kyoto rats (WKY), protein synthetic acitivity was examined by light microscopic autoradiography with3H-lysine. The number of silver grains over the cytoplasm of ganglion cells in the superior cervical and stellate ganglia of newborn and 30-day-old animals were counted on photographic enlargements. In both sympathetic ganglia there were significantly more silver grains over ganglion cells in SHR compared with age-matched WKY at 15, 60, and 120 min after injection of3H-lysine. The increased incorporation of the label by both sympathetic ganglia was more marked in newborn than in 30-day-old animals. This result shows that protein synthetic activity in these ganglion cells is increased in SHR from the newborn stage. It is suggested that a congenital hyperfunction of sympathetic ganglia occurs in SHR.

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