MTTP and metabolic dysfunction-associated steatohepatitis: Additionally, mRNA expression of VLDL secretion-related genes, including apolipoprotein B (Apob) and microsomal triglyceride transfer protein (Mttp), was significantly reduced by approximately 0.5-fold in the NASH group (0.48 ± 0.06-fold for Apob, 0.50 ± 0.01-fold for Mttp; p < 0.01 vs. control).