Chronobiological Analysis of Changes in Circadian Rhythm of Anterior Pituitary Hormones Level During Glycemia Normalization by Means of Biostator

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Abstract
We compared the circadian rhythms of anterior pituitary hormones in 15 patients with noncompensated insulin-dependent diabetes on first and second day treatment with Biostator. The rhythm was evaluated by means of a least squares analysis and presented as the circle of cosinors. In noncompensated diabetes the TSH and prolactin rhythm was maintained, whereas other hormones of the anterior pituitary showed no significant rhythm. In the course of one-day normalization of glycemia by means of Biostator the TSH and prolactin rhythm was maintained, whereas the circadian rhythm of growth hormone and ACTH levels appeared with acrophase at 18.47 and 19.59 hour, respectively. The LH rhythm did not exist, whereas the FSH rhythm was dubious. One may assume that noncompensated diabetes results in the impairment of certain pituitary hormonal rhythms and these disturbances are reversible after restoring of normoglycemia.

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