Phase 1/2 Study of the Highly-selective RET Inhibitor, Pralsetinib (BLU-667), in Participants With Thyroid Cancer, Non-Small Cell Lung Cancer, and Other Advanced Solid Tumors

Summary

This is a Phase 1/2, open-label, first-in-human (FIH) study designed to evaluate the safety, tolerability, pharmacokinetics (PK), pharmacodynamics (PD), and preliminary antineoplastic activity of pralsetinib (BLU-667) administered orally in participants with medullary thyroid cancer (MTC), RET-altered NSCLC and other RET-altered solid tumors.

Timeline

Start

2017-03-17

Primary completion

2024-03-21

Completion

2024-03-21

Publications

• Besse B, Subbiah V, Curigliano G, Bowles DW, Doebele RC, Mansfield AS, Baik CS, de Lima Lopes G, Paz-Ares L, Taylor MH, Tan DSW, Alonso G, Gadgeel SM, Kalemkerian GP, Ou SI, van der Wekken AJ, Becerra CR, Evangelist M, Griesinger F, Liu SV, Lou Y, Mazieres J, Melear JM, Narang M, Saxena A, Thomas M, Wang S, Thomassen A, Lee DH, Kim DW, Gainor JF. Final Efficacy and Safety Data From the Phase I/II ARROW Study of Pralsetinib in Patients With Advanced RET Fusion-Positive Non-Small Cell Lung Cancer. J Clin Oncol. 2026 May;44(13):1190-1197. doi: 10.1200/JCO-25-01489. Epub 2026 Mar 26.
• Haddad RI, Bischoff L, Applewhite M, Bernet V, Blomain E, Brito M, Busaidy NL, Campbell M, DeLozier O, Duh QY, Ehya H, Grady E, Guo T, Haymart M, Hunt JP, Kandeel F, Kotwal A, Lamonica DM, Lorch J, Mandel SJ, Markovina S, Mydlarz W, Nabell L, Raeburn CD, Rezaee R, Ridge JA, Ritter H, Roth MY, Salgado SA, Scheri RP, Shah JP, Sipos JA, Sippel R, Sturgeon C, Wirth LJ, Wong RJ, Worden F, Yeh MW, Darlow S, Cassara CJ, Sliker B. NCCN Guidelines(R) Insights: Thyroid Carcinoma, Version 1.2025. J Natl Compr Canc Netw. 2025 Jul;23(7):e250033. doi: 10.6004/jnccn.2025.0033.
• Subbiah V, Hu MI, Mansfield AS, Taylor MH, Schuler M, Zhu VW, Hadoux J, Curigliano G, Wirth L, Gainor JF, Alonso G, Adkins D, Godbert Y, Ahn MJ, Cassier PA, Cho BC, Lin CC, Zalutskaya A, Barata T, Trask P, Scalori A, Bordogna W, Heinzmann S, Brose MS. Pralsetinib in Patients with Advanced/Metastatic Rearranged During Transfection (RET)-Altered Thyroid Cancer: Updated Efficacy and Safety Data from the ARROW Study. Thyroid. 2024 Jan;34(1):26-40. doi: 10.1089/thy.2023.0363.
• Subbiah V, Burris HA 3rd, Kurzrock R. Revolutionizing cancer drug development: Harnessing the potential of basket trials. Cancer. 2024 Jan;130(2):186-200. doi: 10.1002/cncr.35085. Epub 2023 Nov 7.
• Griesinger F, Curigliano G, Subbiah V, Baik CS, Tan DS, Lee DH, Misch D, Garralda E, Kim DW, van der Wekken AJ, Gainor JF, Paz-Ares L, Liu SV, Kalemkerian GP, Bowles DW, Mansfield AS, Lin JJ, Smoljanovic V, Rahman A, Zalutskaya A, Louie-Gao M, Boral AL, Mazieres J. Pralsetinib in patients with RET fusion-positive non-small-cell lung cancer: A plain language summary of the ARROW study. Future Oncol. 2024 Feb;20(6):297-306. doi: 10.2217/fon-2023-0155. Epub 2023 Nov 2.
• Zhou Q, Zhao J, Chang J, Wang H, Fan Y, Wang K, Wu G, Nian W, Sun Y, Sun M, Wang X, Shi H, Zheng X, Yao S, Qin M, Shen Z, Yang J, Wu YL. Efficacy and safety of pralsetinib in patients with advanced RET fusion-positive non-small cell lung cancer. Cancer. 2023 Oct 15;129(20):3239-3251. doi: 10.1002/cncr.34897. Epub 2023 Jun 6.
• Subbiah V, Cassier PA, Siena S, Garralda E, Paz-Ares L, Garrido P, Nadal E, Vuky J, Lopes G, Kalemkerian GP, Bowles DW, Seetharam M, Chang J, Zhang H, Green J, Zalutskaya A, Schuler M, Fan Y, Curigliano G. Pan-cancer efficacy of pralsetinib in patients with RET fusion-positive solid tumors from the phase 1/2 ARROW trial. Nat Med. 2022 Aug;28(8):1640-1645. doi: 10.1038/s41591-022-01931-y. Epub 2022 Aug 12.
• Popat S, Liu SV, Scheuer N, Hsu GG, Lockhart A, Ramagopalan SV, Griesinger F, Subbiah V. Addressing challenges with real-world synthetic control arms to demonstrate the comparative effectiveness of Pralsetinib in non-small cell lung cancer. Nat Commun. 2022 Jun 17;13(1):3500. doi: 10.1038/s41467-022-30908-1.
• Subbiah V, Hu MI, Wirth LJ, Schuler M, Mansfield AS, Curigliano G, Brose MS, Zhu VW, Leboulleux S, Bowles DW, Baik CS, Adkins D, Keam B, Matos I, Garralda E, Gainor JF, Lopes G, Lin CC, Godbert Y, Sarker D, Miller SG, Clifford C, Zhang H, Turner CD, Taylor MH. Pralsetinib for patients with advanced or metastatic RET-altered thyroid cancer (ARROW): a multi-cohort, open-label, registrational, phase 1/2 study. Lancet Diabetes Endocrinol. 2021 Aug;9(8):491-501. doi: 10.1016/S2213-8587(21)00120-0. Epub 2021 Jun 9.
• Gainor JF, Curigliano G, Kim DW, Lee DH, Besse B, Baik CS, Doebele RC, Cassier PA, Lopes G, Tan DSW, Garralda E, Paz-Ares LG, Cho BC, Gadgeel SM, Thomas M, Liu SV, Taylor MH, Mansfield AS, Zhu VW, Clifford C, Zhang H, Palmer M, Green J, Turner CD, Subbiah V. Pralsetinib for RET fusion-positive non-small-cell lung cancer (ARROW): a multi-cohort, open-label, phase 1/2 study. Lancet Oncol. 2021 Jul;22(7):959-969. doi: 10.1016/S1470-2045(21)00247-3. Epub 2021 Jun 9.

Drugs

Indications