Ibtrozi (taletrectinib)

Crizotinib first demonstrated substantial clinical benefit, but its limitations, including poor central nervous system (CNS) penetration and acquired resistance, highlighted the need for next-generation inhibitors. Several agents have since been developed, including entrectinib, lorlatinib, repotrectinib, taletrectinib, and zidesamtinib, each offering improved intracranial (IC) activity and efficacy against resistance mutations, notably ROS1^G2032R. Despite these advances, optimal sequencing strategies remain undefined, and resistance ultimately emerges in most patients. This review provides an updated overview of ROS1 biology, diagnostic approaches, clinical outcomes with currently available TKIs, mechanisms of resistance, and ongoing challenges, emphasizing the rapidly evolving therapeutic landscape.

Findings show that taletrectinib has a promising anticancer impact, good CNS penetration, and a solid safety record, especially in patients with brain metastases. These results imply that ROS1-positive cancers may benefit from taletrectinib as a treatment.

P2, N=217, Active, not recruiting, Nuvation Bio Inc. | Recruiting --> Active, not recruiting | Trial completion date: Jun 2027 --> Dec 2027

P=N/A, N=50, Not yet recruiting, Innovent Biologics (Suzhou) Co. Ltd.

Systemic SAEs exhibited greater variability across agents, ranging from 29% to 47%: crizotinib, 43% (95% CI, 36%-49%); ceritinib, 41% (95% CI, 37%-45%); lorlatinib, 39% (95% CI, 25%-55%); entrectinib, 32% (95% CI, 28%-36%); repotrectinib, 29% (95% CI, 24%-33%); iruplinalkib, 44% (95% CI, 38%-50%); and unecritinib, 47% (95% CI, 38%-56%)...Taletrectinib and unecritinib were notably associated with hepatotoxicity...These findings will guide drug selection and safety monitoring, emphasizing the necessity of considering patients' health status, potential risk factors, and the characteristics of ROS1-TKI-related adverse reactions. https://www.crd.york.ac.uk/PROSPERO/view/CRD42024551353, identifier CRD42024551353.

P3, N=180, Recruiting, Nuvation Bio Inc.

P=N/A, N=100, Recruiting, Innovent Biologics (Suzhou) Co. Ltd. | Not yet recruiting --> Recruiting

P=N/A, N=100, Not yet recruiting, Innovent Biologics (Suzhou) Co. Ltd.

Moreover, the effect of taletrectinib in promoting pyroptosis was reversed by treatment with the SRC agonist, tolimidone, both in vitro and in vivo. Overall, our findings suggest that taletrectinib suppresses tumor growth by inducing GSDME-mediated pyroptosis via the SRC/AKT/mTOR signaling pathway, indicating that taletrectinib shows potential as a promising therapeutic agent against CRC.