The level of apoptosis has been investigated in thyroid tissue from eight patients with Graves's disease, one with Hashitoxicosis, three with Hashimoto's thyroiditis, and five patients with multinodular goitre, using flow cytometry and an in situ immunofluorescence technique. Cryostat sections have also been studied for Bcl-2 and APO-1/Fas expression in the thyrocytes and infiltrating lymphocytes, to determine their susceptibility to apoptosis. An increased level of apoptosis was detected in Hashimoto's glands. This was associated with decreased Bcl-2 staining and a patchy APO-1/Fas reactivity on thyrocytes. In addition, APO-1/Fas expression was noted within the germinal centres of lymphoid follicles. It is suggested that the dysregulation of apoptosis-related genes could be an important factor in the progression of destructive thyroid autoimmune disease.
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Hammond et al. (1997) studied this question.
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