ArticleTranslational cancer research2026
Targeting LRPPRC lactylation disrupts metabolic-immune crosstalk and restores antitumor immunity in hepatocellular carcinoma.
Article in Translational cancer research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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4 authors.
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Abstract
Background: The Warburg effect drives lactate accumulation in the tumor microenvironment (TME), where it functions as a signaling molecule. Lactate-derived lysine lactylation (Kla) is a novel post-translational modification (PTM) implicated in regulating immune cell function. Leucine-rich pentatricopeptide repeat-containing protein (LRPPRC) is overexpressed in hepatocellular carcinoma (HCC) and plays key roles in mitochondrial metabolism and immune evasion. However, whether and how LRPPRC is regulated by lactylation to coordinate metabolic-immune crosstalk in HCC remains unknown. This study aims to investigate the role and mechanism of LRPPRC lactylation in linking tumor glycolysis to macrophage polarization in HCC. Methods: Bioinformatics analysis identified lactate metabolism-related genes and hub nodes in HCC datasets. LRPPRC lactylation was detected via immunoprecipitation and western blot using pan-Kla antibody. The specific lactylation site was mapped by prediction database and validated by site-directed mutagenesis (K326R). Functional impacts of LRPPRC-Kla Results: LRPPRC was identified as a hub gene among lactate metabolism-related genes in HCC and was upregulated in tumor tissues, correlating with poor prognosis. LRPPRC undergoes lactylation in a lactate-dependent manner, with K326 being the major modification site. The LRPPRC Conclusions: Lactate-induced lactylation of LRPPRC at K326 serves as a critical metabolic-immune switch in HCC. It enhances tumor glycolysis and simultaneously drives M2-like macrophage polarization, fostering an immunosuppressive TME conducive to tumor progression. Targeting the LRPPRC-Kla
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