PNPLA3 rs738409 Genetic Variant Inversely Correlates with Platelet Count, Thereby Affecting the Performance of Noninvasive Scores of Hepatic Fibrosis

Author:

Meroni Marica1ORCID,Dongiovanni Paola1ORCID

Affiliation:

1. Medicine and Metabolic Diseases, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Via Francesco Sforza 35, 20122 Milan, Italy

Abstract

Noninvasive tests (NITs) including platelets (PLTs) have been proposed to replace hepatic biopsy for the diagnosis of nonalcoholic fatty liver disease (NAFLD), or as more recently redefined, metabolic dysfunction-associated steatotic liver disease (MASLD). There has been reported an inverse correlation between PLTs and progressive MASLD, which is also affected by the patatin-like phospholipase domain-containing protein 3 (PNPLA3) rs738409 C>G mutation. However, the correlation between low PLTs and PNPLA3 genotype has been poorly investigated. We stratified 1155 biopsy-proven MASLD patients according to PNPLA3 genotype. The hepatic expression of genes involved in megakaryopoiesis was investigated in n = 167 bariatric patients by RNAseq. PLT count progressively decreased according to the number of PNPLA3 at-risk alleles, irrespective of the presence of advanced fibrosis. The hepatic expression of genes involved in PLT biogenesis was associated with the PNPLA3 GG genotype. Finally, the presence of the PNPLA3 homozygosity flattened the accuracy of fibrosis-4 (FIB-4) in discriminating histological fibrosis stages. The PNPLA3 GG genotype may underpower the accuracy of NITs which include PLT count in identifying those patients with potentially reversible stages of fibrosis.

Publisher

MDPI AG

Subject

Inorganic Chemistry,Organic Chemistry,Physical and Theoretical Chemistry,Computer Science Applications,Spectroscopy,Molecular Biology,General Medicine,Catalysis

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