Deep phenotyping of patients with MASLD upon high-intensity interval training

Area of Science:

• Hepatology
• Exercise Physiology
• Metabolic Diseases

Background:

• Exercise is crucial for managing metabolic dysfunction-associated steatotic liver disease (MASLD).
• Mechanisms and therapeutic effects of exercise on active MASLD (MASH) remain unclear.
• Multi-omic phenotyping was used to investigate exercise effects in MASLD-MASH patients.

Purpose of the Study:

• To evaluate the therapeutic effect of high-intensity interval training (HIIT) on MASLD.
• To characterize the underlying mechanisms of exercise intervention in MASLD-MASH.
• To assess changes in cardiorespiratory fitness and liver health markers.

Main Methods:

• 15 MASLD patients underwent 12 weeks of HIIT and home-based training.
• Evaluations included histology, transient elastography, and MRI for MASLD.
• Multi-omic analyses (RNA sequencing, metagenomics, metabolomics) were performed on various tissues and biofluids.

Main Results:

• HIIT significantly increased VO2max, indicating improved cardiorespiratory fitness.
• No histological improvements in steatosis, MASH, or fibrosis were observed.
• HIIT induced beneficial gene expression changes in adipose tissue and liver, and altered gut microbiota and metabolites.

Conclusions:

• HIIT enhances cardiorespiratory fitness and induces favorable molecular changes in MASLD patients.
• Exercise intervention did not translate to histological liver improvement in this trial.
• Further research with longer exercise interventions is necessary to confirm exercise's role in MASLD treatment.