Tumor-Derived Lactate Drives Malignant Progression of Refractory Papillary Thyroid Carcinoma via the H3K18la-STAT1-LDHA Axis

作者：Zheng Zhou, Chaobin He, Xumeng Wang, Xinguang Jin, Liping Wen, Yan Yang, Quan Zhou, Weibin Wang, Lisong Teng · 发表于：International Journal of Biological Sciences · 年份：2025 · DOI：10.7150/ijbs.120277 · 被引用次数：7 · 研究领域：Cancer, Hypoxia, and Metabolism、Cancer-related Molecular Pathways、Chemical Reactions and Isotopes

Papillary thyroid carcinoma (PTC) remains among the most prevalent endocrine malignancies globally, with its incidence steadily rising. Although clinical outcomes are generally favorable, a clinically significant subset of patients exhibits highly aggressive tumor phenotypes, characterized by larger tumor size and increased lymph node metastasis. Accumulating evidence implicates metabolic reprogramming and epigenetic dysregulation as pivotal drivers of tumor progression. Lactate, one of the byproducts of tumor metabolism, has recently garnered attention for its regulatory functions beyond metabolism. Histone lactylation, a recently identified epigenetic modification dynamically regulated by intracellular lactate accumulation, has emerged as an important regulator of tumor proliferation, metastasis, immune evasion, and therapeutic resistance. However, the functional implications and mechanistic underpinnings of histone lactylation in PTC remain largely unexplored. Here, we report significantly elevated pan-lysine lactylation and histone H3 lysine 18 lactylation (H3K18la) levels in clinical PTC specimens, with tumor tissues exhibiting markedly higher levels compared to adjacent normal thyroid tissues., correlating positively with aggressive clinicopathological features. Relevant cellular phenotypic assays further support this conclusion. Mechanistically, we demonstrate that H3K18la modification directly facilitates the transcriptional activation of Signal Transducer and Activat...