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Journal of Clinical Endocrinology & Metabolism, Vol 59, 427-431, Copyright © 1984 by Endocrine Society

ARTICLES

Increased micrococcal nuclease sensitivity and/or solubility in nuclei from Graves' disease thyroid tissue

M Inaba, N Hamada, H Morii, M Ohno, J Yamakawa, J No, T Mimura, K Ito and M Yukioka

The sensitivity of nuclei to micrococcal nuclease was compared in thyroid tissue obtained from euthyroid patients with solitary cold nodules and from patients with Graves' disease. A significant increase in the solubility and/or the sensitivity of nuclei to the nuclease was found in thyroid tissue from patients with Graves' disease. Electrophoretic analysis of DNA in chromatin solubilized by the nuclease revealed that the amount of oligonucleosomal DNA was increased, and that of polynucleosomal DNA was even more increased, in nuclei from Graves' thyroids than in those from normal thyroids. Polyacrylamide gel electrophoretic analysis in Triton acid-urea showed that the extent of histone acetylation in nuclei from Graves' thyroids was almost the same as in those from normal thyroids. These findings suggest that the state of chromatin organization in Graves' thyroid nuclei is different from that in normal thyroid nuclei and is independent of the extent of histone acetylation.




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Copyright © 1984 by The Endocrine Society