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flag Arrowhead's RNAi drugs ARO-INHBE and ARO-ALK7 showed strong early weight loss and fat reduction in obese patients when combined with tirzepatide, with no serious safety issues.

flag Arrowhead Pharmaceuticals reported promising early results from Phase 1/2a trials of two RNAi therapies, ARO-INHBE and ARO-ALK7, for treating obesity. flag When combined with tirzepatide, ARO-INHBE led to nearly double the weight loss and tripled reductions in visceral, total, and liver fat compared to tirzepatide alone, with up to 9.4% weight loss and 77% liver fat reduction in patients with type 2 diabetes. flag ARO-INHBE also significantly lowered Activin E levels and increased lean tissue. flag ARO-ALK7 showed dose-dependent gene silencing and a 14.1% reduction in visceral fat. flag Both therapies were well-tolerated with no serious safety concerns. flag Results are preliminary, and additional data are expected in 2026.

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