The effect of SRIH-14 or octreotide on the morphological characteristics of adrenal medulla using newcast
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The effects of chronic treatments with either SRIH-14 or octreotide on the adrenal medulla of male Wistar rats were examined. Adult males received subcutaneous (s.c.) injections of 20 μg/100 g body weight of either SRIH-14 or octreotide twice a day for 28 consecutive days. The absolute weights and the absolute volumes of the adrenal glands significantly (p<0.05) decreased after either treatment. The adrenal medulla was analyzed by histological and stereological methods using newCAST. Compared to the control, the relative volumes of the vascular tissues significantly (p < 0.05) decreased - by 40% and 25% in the SRIH-14- and octreotide-treated groups, respectively. In the SRIH-14- and octreotide-treated groups the relative volumes of chromaffin and interstitial tissue increased by 6% and 5% (p < 0.05), respectively. These findings show that both SRIH-14 and octreotide affect the morphological characteristics of the adrenal zona medullaris in a similar manner.