ArticleHepatology communications2025
LECT2 promotes liver regeneration across developmental stages by activating the ADAM10-NOTCH signaling pathway.
Article in Hepatology communications, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundLiver regeneration is a highly complex biological process, and the molecular mechanisms governing regenerative capacity exhibit significant divergence across distinct developmental stages. This study aimed to developmentally conserve pro-regenerative regulators of the liver and elucidate their mechanistic roles in the developmental stages of liver regeneration.
methodsWild-type mice at distinct developmental stages, including 1-month-old (adolescent), 4-month-old (adult), 12-month-old (middle-aged), and 20-month-old (aged), underwent sham surgery or 2/3 partial hepatectomy. RNA sequencing and scRNA-seq identified the target gene and spatial expression. Hepatocyte proliferation was assessed by Ki-67, PCNA staining, and hematoxylin and eosin staining. Functional and mechanistic studies have employed bioinformatics, IF, coimmunoprecipitation, quantitative real-time PCR, and small-molecule inhibition.
resultsRNA sequencing across age groups identified leukocyte cell-derived chemotaxin 2 (LECT2) as a functionally significant mediator in liver regeneration processes. Longitudinal assessment of murine liver regeneration models and patients who underwent hepatectomy revealed dynamic LECT2 expression patterns. LECT2 expression positively correlated with regeneration markers Ki-67 and PCNA. Lect2-KO mice in 4 age groups exhibited impaired liver regeneration. Immunofluorescence staining and single-cell RNA sequencing demonstrated predominant hepatocyte-specific expression of LECT2. Hepatocyte-specific Lect2 knockout significantly impaired liver regeneration following 2/3 partial hepatectomy. Interestingly, there appeared to be no difference in the level of regeneration in mice with suppressed A Disintegrin and Metalloproteinase Domain 10 (ADAM10) expression despite Lect2 overexpression. Mechanistic investigations revealed that LECT2 potentiates hepatic regeneration by activating the ADAM10-NOTCH signaling pathway. Finally, our in vivo therapeutic model demonstrated that adeno-associated virus-mediated Lect2 overexpression significantly enhanced the posthepatectomy regenerative capacity.
conclusionsLECT2 promotes liver regeneration across developmental stages by activating the ADAM10-NOTCH signaling pathway, providing a promising therapeutic target for enhancing hepatic repair.
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