Being interested in the broad-ranged individual variation of excretory 17-ketosteroids (17-kS) in urine on persons less than 10 years of age whose 17-KS are almost regarded as those derived from the adrenal cortex, I examined these daily excretions in urine of 22 normal and healthy children of aged from 6 years 9 months to 7 years 10 months (aver. 7 years 4 months) and, made a consideration about their individual variation.
1) measured 17-KS by the modified Holtorff-Koch's method with dehydro-iso-androsterone as standard.
2) The values of daily excretions in urines of these substances ranged from 1.4mg to 6.5mg (mean, 3.7mg: 3.2mg≤M≤4.2mg, α=0.05) in this age.
3) The extent of age of 14 months did not display a significant variation in these 22 cases.
4) The difference between boys and girls could also not be found.
5) I divided these children into two groups by the table of testing diathetic tendency used in our department. One group consists of those individuals whose bodies are more sensitive to various stimuli, and the other consists of those individuals whose bodies are not so sensitive, then I found significant lower values of 17-KS excretions in the former group.
According to the Sayers and Sayers' theory in which PERIPHERAL-HUMORAL-MECHANISM of homeostasis between ACTH and adrenocortical hormone plays a greater part in the PITUITARY ADRENAL SYSTEM, it could be said that individuals possessing fewer cortical hormones will deplete greater parts of these hormones and will induce larger proportions of ACTH from the pituitary under various kinds of stressful conditions, if surmised that the same quantities of cortical hormones in the tissue cells are utilized by the same quantities of stimuli. In other words, those individuals will produce the alarm reactions (Selye) more easily and more severely.
It may be of interest that individual variation of adrenal cortical hormones in bodies would indicate the degree of individual response to stimuli.
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