Telomere

Abaloparatide (Tymlos) is a synthetic 34-amino-acid analog of parathyroid hormone-related protein, PTHrP(1-34), engineered to bind the PTH1 receptor with a strong preference for its transient RG conformation rather than the long-lived R0 conformation favored by teriparatide. That receptor bias produces a shorter burst of signaling per injection - enough to drive osteoblast activity, but short enough to limit the bone resorption and calcium mobilization that follow a prolonged signal. In the 18-month Phase 3 ACTIVE trial in 2,463 postmenopausal women, abaloparatide 80 mcg daily reduced new morphometric vertebral fractures by 86% versus placebo, alongside significant reductions in nonvertebral, major osteoporotic and clinical fractures. The FDA approved Tymlos in April 2017; in December 2021 the osteosarcoma boxed warning and the two-year cumulative lifetime limit were both removed from the label.

A growth hormone releasing hormone analog studied for stimulating growth hormone secretion.

A long-acting GHRH analog with an extended half-life due to its Drug Affinity Complex modification.

A hexapeptide analog studied for cognitive enhancement via hepatocyte growth factor pathway activation.