FIB-4 as a screening and disease monitoring method in pre-fibrotic stages of metabolic dysfunction-associated fatty liver disease (MASLD).

AIMS: Guidelines emphasize screening high-risk patients for metabolic dysfunction-associated steatotic liver disease (MASLD) with a calculated FIB-4 score for therapy to reverse fibrosis. We aimed to determine whether FIB-4 can effectively screen and monitor changes in steatohepatitis (MASH).

METHODS

Data were retrieved from the NIDDK-CR R4R central repository, of the CRN/PIVENS (pioglitazone vs vitamin E vs placebo) trial of adult patients without diabetes mellitus and with MASLD.

RESULTS

220 patients with MASLD had alanine transaminase (ALT), aspartate aminotransferase (AST) and platelet count, to calculate FIB-4, and repeat liver biopsies for histological MASLD activity scores (NAS). Compared to NAS score of 2, Fib-4 was higher at NAS 5) (p = 0.03), and NAS score of 6 (p = 0.02). FIB-4 correlated with cellular ballooning (r = 0.309, p < 0.001). Levels of ALT (ANOVA, p = 0.016) and AST (ANOVA p = 0.0008) were associated with NAS. NAS improved with pioglitazone by 39 %, p < 0.001 and with vitamin E by 36 %, p < 0.001. Pioglitazone and vitamin E both improved histological sub-scores for steatosis, and inflammation, without statistical changes in fibrosis grade. Changes in FIB-4 correlated with changes in NAS (r = 0.237, p < 0.001).

CONCLUSIONS

In this post hoc analysis, changes in FIB-4 were associated with changes of steatohepatitis. Medication known to treat steatohepatitis, may be considered, before the onset of advanced fibrosis.