○ Evidence tier 7 — In vitro / ex vivo

Record verify: verified against primary source

DesignPreclinical mechanism (cell culture)
DOI10.1111/acel.12445
Citation statusdoi verified via Crossref 2026-07-12 (Aging Cell 2016;15(3):428-435, Zhu et al.)

Identifiers: DOI verified; PMID not reported; trial registry id not applicable to this study type. Record-level verification and identifier-level status are separate: a record can be fully verified against its primary publication while an identifier that cannot apply to the study type — a trial registry ID for an animal study, for instance — is marked not applicable. No identifier is fabricated, and none is left in a “pending” state.

Five-qualifier claim

Species / populationCultured senescent human and mouse cells.
Exposure, route, scheduleABT-263 (navitoclax) in vitro.
Comparator / durationNon-senescent vs senescent cells.
Endpoint / numeric resultNavitoclax selectively killed senescent cells by inhibiting Bcl-2/Bcl-xL, establishing a targeted senolytic mechanism.
What it did NOT establishIn vitro / mechanism; no human senolytic outcome.