Combination therapy with pioglitazone/exenatide/metformin reduces the prevalence of hepatic fibrosis and steatosis: The efficacy and durability of initial combination therapy for type 2 diabetes (EDICT)

Olga Lavynenko, Muhammad Abdul-Ghani, Mariam Alatrach, Curtiss Puckett, John Adams, Siham Abdelgani, Naim Alkhouri, Curtis Triplitt, Geoffrey D. Clarke, Juan A. Vasquez, Jinqi Li, Eugenio Cersosimo, Amalia Gastaldelli, Ralph A. DeFronzo

Research output: Contribution to journalArticlepeer-review

Abstract

Aim: To compare the efficacy of triple therapy (metformin/exenatide/pioglitazone) versus stepwise conventional therapy (metformin → glipizide → glargine insulin) on liver fat content and hepatic fibrosis in newly diagnosed, drug-naïve patients with type 2 diabetes. Methods: Sixty-eight patients completed the 6-year follow-up and had an end-of-study (EOS) FibroScan to provide measures of steatosis (controlled attenuation parameter [CAP] in dB/m) and fibrosis (liver stiffness measurement [LSM] in kPa); 59 had magnetic resonance imaging-proton density fat fraction (MRI-PDFF) to measure liver fat. Results: At EOS, HbA1c was 6.8% and 6.0% in triple and conventional therapy groups, respectively (P =.0006). Twenty-seven of 39 subjects (69%) receiving conventional therapy had grade 2/3 steatosis (CAP, FibroScan) versus nine of 29 (31%) in triple therapy (P =.0003). Ten of 39 (26%) subjects receiving conventional therapy had stage 3/4 fibrosis (LSM) versus two of 29 (7%) in triple therapy (P =.04). Conventional therapy subjects had more liver fat (MRI-PDFF) than triple therapy (12.9% vs. 8.8%, P =.03). The severity of steatosis (CAP) (r = 0.42, P <.001) and fibrosis (LSM) (r = −0.48, P <.001) correlated inversely with the Matsuda Index of insulin sensitivity, but not with percentage body fat. Aspartate aminotransferase (AST) to Platelet Ratio Index (APRI), non-alcoholic fatty liver disease fibrosis score (NFS), plasma AST, and alanine aminotransferase (ALT) all decreased significantly with triple therapy, but only the decrease in plasma AST and ALT correlated with the severity of steatosis and fibrosis at EOS. Conclusions: At EOS, subjects with type 2 diabetes treated with triple therapy had less hepatic steatosis and fibrosis versus conventional therapy; the severity of hepatic steatosis and fibrosis were both strongly and inversely correlated with insulin resistance; and changes in liver fibrosis scores (APRI, NFS, Fibrosis-4, and AST/ALT ratio) have limited value in predicting response to therapy.

Original languageEnglish (US)
Pages (from-to)899-907
Number of pages9
JournalDiabetes, Obesity and Metabolism
Volume24
Issue number5
DOIs
StatePublished - May 2022
Externally publishedYes

Keywords

  • fatty liver disease
  • type 2 diabetes

ASJC Scopus subject areas

  • Internal Medicine
  • Endocrinology, Diabetes and Metabolism
  • Endocrinology

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