Longitudinal controlled attenuation parameter and liver stiffness in children with and without perinatal HIV infection in South Africa.

Objectives: Metabolic dysfunction-associated steatotic liver disease (MASLD) is an emerging cause of liver disease in HIV. Transient elastography (TE) with controlled attenuation parameter (CAP) measures liver stiffness as a marker of liver fibrosis and CAP as a measure of hepatic steatosis. Our aim was to evaluate longitudinal CAP and liver stiffness in children with perinatally acquired HIV (PHIV) on antiretroviral therapy (ART) from early life compared to children without HIV (HU).

Design: Prospective cohort study.

Methods: PHIV and HU were followed annually for two years. During the study, 60% of PHIV switched from older ART regimens to tenofovir disoproxil, lamivudine and dolutegravir (TLD). Longitudinal evolution of CAP and liver stiffness were investigated in two PHIV groups - on older ART and on TLD - compared to HU children using linear mixed effects models.

Results: 263 children and adolescents (112 PHIV, 151 HU) aged 7-20 years were followed. PHIV on older ART had CAP 8.61% (95% CI 4.42-12.97, P  < 0.001) greater than HU and no significant difference in CAP between PHIV on TLD and HU. No significant difference in liver stiffness was found between PHIV on older ART regimens and PHIV on TLD compared to HU.

Conclusion: PHIV on older ART had higher CAP than HU, whereas in PHIV switched to TLD there was no difference in CAP compared to HU. There was no difference in liver stiffness between either PHIV group and HU. This suggests starting ART early in life might protect PHIV from developing hepatic fibrosis.