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- W2077973372 abstract "Some years ago, we reported that colloid goiters could be produced experimentally in mice and rats by injection of TSH over a few days in the presence of ample iodine supply. This clearly showed that colloid accumulation and intense TSH stimulation are not mutually exclusive. In the present study, large colloid goiters, sharing many morphological and biochemical characteristics with human colloid goiters, were induced in rats and mice by treatment with 5,5-diphenyl-2-thiohydantoin (DPTH). This drug increases fecal loss of thyroid hormone and inhibits conversion of T4 to T3. Thus, DPTH raises TSH and induces macrofollicular colloid-rich goiters. In contrast to this, goiters induced by combined treatment with methimazole (MMI) or sodium perchlorate and DPTH are microfollicular, although serum TSH is increased to the same level as in rats treated with DPTH alone. The degree of iodine organification obviously determines if the follicle will sprout and form daughter follicles or if it will expand its hull. Thyroglobulin content of DPTH goiters is lower than that of normal glands but considerably higher than after MMI treatment, whereas total iodine content of DPTH goiters is only slightly lower than in normal glands, but also much higher than in MMI goiters. In DPTH goiters, a high proportion of total iodine is in the particulate fraction which probably contains the periodic acid Schiff-positive bodies floating in the colloid of DPTH treated glands. Acute DPTH administration does not inhibit iodide organification, but after treatment with DPTH for 1 day, chromatography suggests some inhibition of iodine organification and hormone synthesis by DPTH, but much less than by MMI. DPTH treatment causes considerable tissue damage and repair, such as follicular cell necrosis and invasion of the colloid by macrophages and granulation tissue. Therefore, DPTH goiters might well be a useful model not only for colloid goiter formation but also for inflammatory processes in the thyroid gland." @default.
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- W2077973372 date "1994-12-01" @default.
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- W2077973372 title "Transformation of normal thyroids into colloid goiters in rats and mice by diphenylthiohydantoin." @default.
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- W2077973372 doi "https://doi.org/10.1210/endo.135.6.7988459" @default.
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