胸腺と副腎の関連性より見た内分泌腺臓器重量に就て

概要

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Endocrine glands and a few other organ weight had been measured in order to clarify the relationship between thymus and adrenal gland. 1) Body weight of the Wistar strain rats increased at the rate of about 15 gr. per 10 days until 50 days old after birth, and between 51 and 80 days, it showed comparatively rapid increase at the rate of about 30 gr. per 10 days, but after 81 days the increase of body weight became more slowly. 2) Adrenal weight was parallel to the body weight, but maximum increasing rate of the thymus weight was observed between 61 and 70 days after birth, and it began to atrophy after 81 days old. 3) Adrenal and thymus weight per 100gr. body weight decreased every 10 days and it became 47% of new born between 81 and 100 days after birth. 4) The ratio of thymus to adrenal weight per 100gr. body weight was 1 : 8 until 40 days after birth, and between 41 and 80 days it increased to 1 : 8.8-9.6 and after that the ratio began to show the gradual decrease again. 5) The rat thymus weight 7 days after adrenalectomy gained 1.9 times of unoperated, and lymphatic gland weight also showed such increase as 65-58% as compared with unoperated rats. 6) Adrenal and testis weight of thymectomized rats showed slight increasing tendency 7 days after operation.