Background: Treatment with integrase strand transfer inhibitors (INSTIs) has been associated with excess weight gain, however the long-term effect of INSTI-based regimens on adipose tissue (AT) compartments remains unknown. Objectives: To evaluate the effect of switching to an INSTI on visceral (VAT) and subcutaneous (SAT) AT in virologically-suppressed adults with HIV. Methods: We performed a retrospective observational cohort study of ART experienced adults referred to the metabolic Clinic of the University of Modena and Reggio Emilia who had ≥2 assessments of body composition by abdominal computed tomography. An interrupted time series model with mixed-effect model incorporated was used to calculate VAT and SAT change rate, adjusting for smoking status, use of alcohol, and physical activity. Results: A total of 698 patients were included: 156 who switched to an INSTI-based regimen and 542 who did not. After switch to INSTI, mean SAT area increased approximately 3-fold (before 0.27 vs after 0.73 cm2/month; p = 0.011), and VAT area 7-fold (0.18 vs 1.30 cm2/month; p < 0.001).Conclusions: Among PLWH on ART, both SAT and VAT gain accelerated after switching to an INSTI-based regimen. The associations between INSTIs and central adiposity require further investigation.
Background: Treatment with integrase strand transfer inhibitors (INSTIs) has been associated with excess weight gain, however the long-term effect of INSTI-based regimens on adipose tissue (AT) compartments remains unknown. Objectives: To evaluate the effect of switching to an INSTI on visceral (VAT) and subcutaneous (SAT) AT in virologically-suppressed adults with HIV. Methods: We performed a retrospective observational cohort study of ART experienced adults referred to the metabolic Clinic of the University of Modena and Reggio Emilia who had ≥2 assessments of body composition by abdominal computed tomography. An interrupted time series model with mixed-effect model incorporated was used to calculate VAT and SAT change rate, adjusting for smoking status, use of alcohol, and physical activity. Results: A total of 698 patients were included: 156 who switched to an INSTI-based regimen and 542 who did not. After switch to INSTI, mean SAT area increased approximately 3-fold (before 0.27 vs after 0.73 cm2/month; p = 0.011), and VAT area 7-fold (0.18 vs 1.30 cm2/month; p < 0.001).Conclusions: Among PLWH on ART, both SAT and VAT gain accelerated after switching to an INSTI-based regimen. The associations between INSTIs and central adiposity require further investigation.
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