ArticleBMC cancer2024
Efficacy and safety of RET-TKI in advanced RET-rearranged non-small cell lung cancer in China: a real-world retrospective chart review.
Article in BMC cancer, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundSelective RET inhibitors have been approved by the Chinese government for the treatment of RET-rearranged non-small cell lung cancer. This study aimed to illustrate the efficacy and safety of selective RET inhibitors in a real-world clinical context in China.
methodsPatients with locally advanced or metastatic non-small cell lung cancer (NSCLC) harboring RET rearrangement and receiving RET tyrosine kinase inhibitors (RET-TKI) in the real world were enrolled in this retrospective study. Clinical data, including baseline clinicopathological information, efficacy parameters such as objective response rate (ORR) and progression-free survival (PFS), and adverse events (AEs), were collected from the electronic medical record system. The pattern of treatment failure of first-line RET-TKI was also described.
resultsFifty-one patients were enrolled in this study. RET-TKI induced an ORR of 73.1% and a median PFS (mPFS) of 22.7 months (95%CI, 11.7-33.7) in the first-line setting. The ORR and mPFS were 58.3% and 17.7 months (95%CI, 9.1-26.2), 55.6% and 14.7 months (95%CI, 12.6-16.8) in the second-line and later-line settings, respectively. No significant difference was observed among different application lines with respect to the ORR (P = 0.534) or PFS (P = 0.795). In the first-line setting, RET-TKI significantly prolonged PFS compared to other regimens including chemotherapy-based regimens, multikinase inhibitors and other systemic regimens without chemotherapy (P < 0.05). Poor ECOG performance status was related to shorter PFS (P = 0.018). The most common AEs of grade 3 or worse were a decreased neutrophil count (11.4%) and anemia (11.4%). No new AEs or grade 5 AEs were observed. Brain metastasis was one of the most common patterns of treatment failure. In patients with baseline brain metastasis, the intracranial ORR was 50%, and the DCR was 100%.
conclusionsRET-TKI had favorable efficacy and safety in real-world contexts in China and should be considered the preferred choice for first-line treatment in RET-rearranged NSCLC patients.
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