Vasconcelos JCD, Siqueira IBD, Maia FFR, Parisi MCR, Zantut-Wittmann DE. Influence of thyroid hormone in the expression of the marker pro-apoptosis BID, in spite of the predominance of anti-apoptosis activation in intratiroidal lymphocytic infiltration in Hashimoto's thyroiditis.
Mol Cell Endocrinol 2021;
537:111421. [PMID:
34389447 DOI:
10.1016/j.mce.2021.111421]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Revised: 08/07/2021] [Accepted: 08/09/2021] [Indexed: 11/25/2022]
Abstract
UNLABELLED
Cell destruction in Hashimoto's thyroiditis (HT) involves autoantibodies and cytotoxic T lymphocytes. Thyrocytes maintenance occurs by pro-apoptotic, anti-apoptotic and cell proliferation balance.
OBJECTIVES
To characterize factors related to the mechanisms of apoptosis and cell proliferation in thyroid cells and intrathyroid lymphocytic infiltrate in HT.
METHODS
We assessed lymphocytic infiltrate and thyroid cells from HT and normal thyroid by immunohistochemical analysis of cell proliferation (Ki-67), antiproliferation (p27Kip1), pro-apoptosis (Fas, Fas-ligand, BID) and anti-apoptosis (MCL-1, BCL2) markers.
RESULTS
Lymphocytic infiltrate presented BCL2 and MCL-1 higher expression, Ki-67 and p27kip1 balance. Thyrocytes exhibited Fas and FasL balance, higher BID expression; MCL-1, BCL-2, Ki-67 similar to the normal thyroid. T4 and higher lymphocytes BID expression were associated.
CONCLUSIONS
In lymphocytic infiltrate predominated anti-apoptosis in relation to pro-apoptosis except for BID. Thyrocytes presented pro-apoptosis and anti-apoptosis balance and cell proliferation similar to normal thyroid. T4-associated BID expression in HT lymphocytes suggests the influence of thyroid hormone as a signal to up-regulate the BID pro-apoptotic protein and thus increase lymphocytic apoptosis rates.
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