Li L, Ding X, Zhang X, Kong S, Chen M. Clinical significance of thyroid autoantibodies in differential diagnosis and predicting the course of programmed cell death protein-1 inhibitor-induced thyroid dysfunction.
Endocr Pract 2024:S1530-891X(24)00661-X. [PMID:
39216687 DOI:
10.1016/j.eprac.2024.08.012]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2024] [Revised: 08/15/2024] [Accepted: 08/23/2024] [Indexed: 09/04/2024]
Abstract
BACKGROUND
Thyroid immune-related thyrotoxicosis is one of the most common adverse effects in patients treated with programmed cell death protein-1 (PD-1) inhibitors. We investigated the significance of levels of serum anti-thyroglobulin antibodies (TgAbs), anti-thyroid peroxidase antibodies (TPOAbs), and TSH receptor antibodies (TRAbs) in the identification of anti-PD-1-induced thyroid thyrotoxicosis.
METHODS
We divided 161 patients with thyroid dysfunction who received PD-1 inhibitors at our hospital between January 2022 and June 2024 into three groups: primary hypothyroidism group, primary hyperthyroidism group, and destructive thyroiditis group. The characteristics of the three groups were determined, and the positivity rates of serum TgAbs, TPOAbs, and TRAbs were assessed. An additional 42 patients diagnosed with Hashimoto's thyroiditis were selected as the control group for PD-1 inhibition-induced destructive thyroiditis. Age, sex, and time of transition from thyrotoxicosis to hypothyroidism in the two groups were compared.
RESULTS
In the primary hypothyroidism group, only one case was TPOAbs-positive (1/1%). In the destructive thyroiditis group, the positivity rate for TPOAbs or TgAbs was 92.9%, and TPOAbs and TgAbs were negative in the primary hyperthyroidism group. TRAbs were undetectable in all three groups. There were statistically significant differences in age, sex, and time from thyrotoxicosis to hypothyroidism in the PD-1 induced destructive thyroiditis and Hashimoto's thyroiditis groups.
CONCLUSIONS
In patients with thyrotoxicosis caused by PD-1 inhibitors, serum TgAb and TPOAb levels can be used to distinguish between primary hyperthyroidism and destructive thyroiditis. This study provides insights into novel treatment targets and effective management strategies for PD-1-induced thyrotoxicosis.
Collapse