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Repotrectinib (TPX-0005) Is a Next-Generation ROS1/TRK/ALK Inhibitor That Potently Inhibits ROS1/TRK/ALK Solvent- Front Mutations
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Abstract
The use of tyrosine kinase inhibitors (TKI) with activity against ALK, ROS1, or TRKA–C can result in significant clinical benefit in patients with diverse tumors harboring ALK, ROS1, or NTRK1–3 rearrangements; however, resistance invariably develops. The emergence of on-target kinase domain mutations represents a major mechanism of acquired resistance. Solvent-front substitutions such as ALKG1202R, ROS1G2032R or ROS1D2033N, TRKAG595R, and TRKCG623R are among the most recalcitrant of these mechanisms. Repotrectinib (TPX-0005) is a rationally designed, low-molecular-weight, macrocyclic TKI that is selective and highly potent against ROS1, TRKA–C, and ALK. Importantly, repotrectinib exhibits activity against a variety of solvent-front substitutions in vitro and in vivo. As clinical proof of concept, in an ongoing first-in-human phase I/II trial, repotrectinib achieved confirmed responses in patients with ROS1 or NTRK3 fusion–positive cancers who had relapsed on earlier-generation TKIs due to ROS1 or TRKC solvent-front substitution-mediated resistance. Significance: Repotrectinib (TPX-0005), a next-generation ROS1, pan-TRK, and ALK TKI, overcomes resistance due to acquired solvent-front mutations involving ROS1, NTRK1–3, and ALK. Repotrectinib may represent an effective therapeutic option for patients with ROS1-, NTRK1–3-, or ALK-rearranged malignancies who have progressed on earlier-generation TKIs. Cancer Discov; 8(10); 1227–36. ©2018 AACR. This article is highlighted in the In This Issue feature, p. 1195
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“Repotrectinib, recently FDA-approved for advanced ROS1+ NSCLC,9 has CNS activity and was designed to be effective against ROS1 resistance mutations.16,17”
From Taletrectinib in ROS1 + Non–Small Cell Lung Cancer: TRUST (2025) · cites this paper as [16]
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“Prior studies have elucidated mechanisms of on-target resistance mediated by a spectrum of ROS1 kinase domain mutations (e.g., ROS1 G2032R) 6 – 9 , motivating the clinical development of next-generation ROS1 inhibitors 10 – 13 .”
BackgroundSelf-citationVilla, M., Malighetti, F., Sala, E., Sharma, G. G., Arosio, G., Gemelli, M., Manfroni, C., Fontana, D., Cordani, N., Meneveri, R., et al. (2024) · npj Precision Oncology · doi:10.1038/s41698-024-00498-w · Cited by 11
“As C1237Y and L1196P mutants appeared to resist all clinical inhibitors, we tested their sensitivity to two novel investigational drugs, zotizalkib (TPX-0131) 16 and repotrectinib (TPX-0005) 17 and compared the compounds activity with their close structural analogue, lorlatinib.”
The role of plasma genotyping in ALK- and ROS1-rearranged lung cancer
Dagogo‐Jack, I., & Ritterhouse, L. L. (2020) · Translational Lung Cancer Research · doi:10.21037/tlcr-2019-cnsclc-09 · Cited by 11
“Current understanding of key molecular drivers of relapse in ROS1+ NSCLC is not as robust, but several studies suggest that secondary kinase domain mutations play a critical role in relapses and that next-generation ROS1 TKIs may be able to overcome certain acquired kinase domain mutations (80,89-91).”
BackgroundLi, W., Sparidans, R. W., Lebre, M. C., Beijnen, J. H., & Schinkel, A. H. (2021) · Pharmaceutics · doi:10.3390/pharmaceutics13111761 · Cited by 11
“Importantly, the systemic exposure in wild-type mice dosed with repotrectinib at 10 mg/kg reached clinically relevant exposure levels, similar to those in patients taking repotrectinib at 160 mg once daily [10].”
BackgroundSuzuki, C., Nishiyama, A., Arai, S., Tange, S., Tajima, A., Tanimoto, A., Fukuda, K., Takumi, Y., Kotani, H., Takeuchi, S., et al. (2022) · Cancer Science · doi:10.1111/cas.15354 · Cited by 10
Safety of current treatment options for NTRK fusion-positive cancers
Yang, A. T., & Laetsch, T. W. (2023) · Expert Opinion on Drug Safety · doi:10.1080/14740338.2023.2274426 · Cited by 10
“…larotrectinib, solvent-front substitutions in entrectinib-treated disease resulted in resistance; second-generation multikinase inhibitors like repo-trectinib (targets ROS1, TRK, ALK) are in development that have been reported to inhibit clinically refractory solvent front substituted disease [57].”
BackgroundMichels, S. Y. F., Massutí, B., Vasyliv, I., Stratmann, J., Frank, J., Adams, A., Felip, E., Grohé, C., Rodríguez‐Abreu, D., Bischoff, H. G., et al. (2024) · ESMO Open · doi:10.1016/j.esmoop.2024.102237 · Cited by 10
“13,14 In 2019, we reported a median progression-free survival (PFS) of 20.0 months for ROS1 fusion-positive patients treated with crizotinib in the EUCROSS trial.”
BackgroundInfluentialZhou, Y., Kang, J., & Lu, X. (2024) · Journal of Medicinal Chemistry · doi:10.1021/acs.jmedchem.4c00361 · Cited by 14
Desîlets, A., Repetto, M., & Drilon, A. E. D. C. (2024) · Clinical and Translational Medicine · doi:10.1002/ctm2.70017 · Cited by 10
“19 Preclinical studies first reported the high potency of repotrectinib against ROS1 and TRK, with a 15-fold kinase specificity index when compared to ALK, as well as tumour regressions in xenograft models of both CD74-ROS1 fusion WT and ROS1 G2032R-mutant tumours.”
BackgroundInfluentialSelf-citationMacrocycles for Conventionally Druggable Targets: Lessons from Macrocyclic Kinase Inhibitors
Viarengo‐Baker, L. A., & Whitty, A. (2025) · Journal of Medicinal Chemistry · doi:10.1021/acs.jmedchem.4c02886 · Cited by 10
Neurotrophic receptor tyrosine kinase (NTRK) fusions and their role in cancer
Ruiz‐Cordero, R., & Ng, D. L. (2020) · Cancer Cytopathology · doi:10.1002/cncy.22350 · Cited by 10
Type I inhibitors of tropomyosin receptor kinase (Trk): a 2020–2022 patent update
Jaworski, C., Iliev, P., Wängler, C., Wängler, B., Page, B. D. G., Schirrmacher, R., & Bailey, J. J. (2023) · Expert Opinion on Therapeutic Patents · doi:10.1080/13543776.2023.2262136 · Cited by 10
“To overcome these challenges, the second-generation type I inhibitors, selitrectinib and repotrectinib, were designed as compact macrocycles to limit their surface area in the active site and retain efficacy against resistance mutations (Figure 2(b)) [5,6].”
BackgroundLarotrectinib in a Patient With Advanced Pleomorphic Liposarcoma of the Uterus
Valenciaga, A., Iwenofu, O. H., & Tinoco, G. (2021) · Journal of the National Comprehensive Cancer Network · doi:10.6004/jnccn.2021.7039 · Cited by 10
Fan, Y., Zhang, Y. J., Liu, Y., Jiang, H., Zhou, Y., Tang, C., & Fan, W. (2022) · Bioorganic & Medicinal Chemistry Letters · doi:10.1016/j.bmcl.2022.128646 · Cited by 10
Naito, Y., Mishima, S., Akagi, K., Hayashi, N., Hirasawa, A., Hishiki, T., Igarashi, A., Ikeda, M., Kadowaki, S., Kajiyama, H., et al. (2023) · International Journal of Clinical Oncology · doi:10.1007/s10147-023-02345-7 · Cited by 9
Balasundaram, A., & Doss, C. G. P. (2024) · Frontiers in Molecular Biosciences · doi:10.3389/fmolb.2023.1306046 · Cited by 10
ERK signaling promotes resistance to TRK kinase inhibition in NTRK fusion-driven glioma mouse models
Schmid, S., Russell, Z. R., Yamashita, A. S., West, M. E., Parrish, A. G., Walker, J. R., Rudoy, D., Yan, J. Z., Quist, D. C., Gessesse, B. N., et al. (2024) · Cell Reports · doi:10.1016/j.celrep.2024.114829 · Cited by 9
Kubota, Y., Kawano, M., Iwasaki, T., Itonaga, I., Kaku, N., Ozaki, T., & Tanaka, K. (2025) · Japanese Journal of Clinical Oncology · doi:10.1093/jjco/hyaf015 · Cited by 10
“Although second-generation TRK inhibitors are under development [113,114], they have not yet been approved for routine clinical use.”
Unraveling the therapeutic landscape of approved non-peptide macrocycles
Li, Z., Zhang, Z., & Yu, B. (2025) · Acta Pharmaceutica Sinica B · doi:10.1016/j.apsb.2025.04.021 · Cited by 10
Cho, H., Kim, N., Murakami, T., & Sim, T. (2021) · Frontiers in Oncology · doi:10.3389/fonc.2021.757598 · Cited by 9
NTRK-fusions in pediatric thyroid tumors: Current state and future perspectives
Casado‐Medrano, V., O’Neill, A., Halada, S., Laetsch, T. W., Bauer, A. J., & Franco, A. T. (2022) · Cancer Genetics · doi:10.1016/j.cancergen.2022.02.009 · Cited by 9
Dazio, G., Epistolio, S., Frattini, M., & Saletti, P. (2022) · Journal of Clinical Medicine · doi:10.3390/jcm11247523 · Cited by 10
Progress in clinical diagnosis and treatment of colorectal cancer with rare genetic variants
Chen, S.-Y., Gu, J., Wu, K., Zhao, X., & Lu, Y. (2024) · Cancer Biology and Medicine · doi:10.20892/j.issn.2095-3941.2024.0026 · Cited by 9
“ALK inhibitors are expected to be used for the treatment of patients with ROS1 gene rearranged mCRC 57,61,67 .”
BackgroundTreatment of anaplastic lymphoma kinase-positive non-small cell lung cancer: update and perspectives
Ryser, C. O., Diebold, J., & Gautschi, O. P. (2018) · Current Opinion in Oncology · doi:10.1097/cco.0000000000000494 · Cited by 9
Li, W., Perpinioti, N., Schinkel, A. H., Beijnen, J. H., & Sparidans, R. W. (2020) · Journal of Chromatography B · doi:10.1016/j.jchromb.2020.122098 · Cited by 9
“In line with this, repotrectinib has displayed highly potent antiproliferative activity against wild-type fusion proteins and their solvent front mutations involving ROS1, TRK and ALK in cellular inhibitory assays and xenograft models in multiple preclinical models [8].”
BackgroundMethodInfluentialROS1-rearranged Non–small Cell Lung Cancer
Giustini, N., & Bazhenova, L. A. (2020) · Thoracic surgery clinics/Thorac. surg. clin. · doi:10.1016/j.thorsurg.2020.01.007 · Cited by 9
Hanf, D., Heining, C., Laaber, K., Nebelung, H., Uhrig, S., Hutter, B., Jahn, A., Richter, D., Aust, D. E., Herbst, F., et al. (2021) · JCO Precision Oncology · doi:10.1200/po.20.00278 · Cited by 9
“Currently, there is no approved NTRK inhibitor to overcome acquired resistance conveyed by the NTRK3 substitution,(14) while the potential of next-generation inhibitors such as LOXO-195 and repotrectinib is investigated in clinical trials.(12,15,26,27) To our knowledge, there are no data on the”
BackgroundKubota, Y., Kawano, M., Iwasaki, T., Itonaga, I., Tsumura, H., Kaku, N., & Tanaka, K. (2023) · Medicine · doi:10.1097/md.0000000000036232 · Cited by 8
“…tumors is effective for on-target resistance to the first-generation ALK inhibitor, [12] the second-generation TRK inhibitor selitrectinib [13] or repotrectinib [14] have been developed together with the first-generation TRK inhibitor, and their phase I/II trials are currently being conducted.”
BackgroundConformational adjustment overcomes multiple drug-resistance mutants of tropomyosin receptor kinase
Mei, L., Zhuo, L., Xu, H.-C., Huang, W., Hao, G., & Yang, G. (2022) · European Journal of Medicinal Chemistry · doi:10.1016/j.ejmech.2022.114406 · Cited by 9
Song, X., Wu, Y., Xiao-juan, Q., & Jiang, B. (2023) · MedComm – Oncology · doi:10.1002/mog2.50 · Cited by 8
Histology Agnostic Drug Development: An Updated Review
Nguyen, K., Fama, K. B., Mercado, G., Myat, Y. M., & Thein, K. Z. (2024) · Cancers · doi:10.3390/cancers16213642 · Cited by 9
Zidesamtinib Selective Targeting of Diverse ROS1 Drug-Resistant Mutations
Tangpeerachaikul, A., Mente, S., Magrino, J., Gu, F., Horan, J. C., & Pelish, H. E. (2025) · Molecular Cancer Therapeutics · doi:10.1158/1535-7163.mct-25-0025 · Cited by 8
“Taletrectinib (100 mg/kg once daily) and repotrectinib [15 and 75 mg/kg twice daily, matching doses used in other preclinical studies (15, 77, 78)] showed initial suppression of brain tumors, but their efficacy was short-lived.”
Xiao, X., Xu, Y., Yu, X., Chen, Y., Zhao, W., Xie, Z., Zhu, X., Xu, H., Yang, Y., & Zhang, P. (2023) · Bioorganic & Medicinal Chemistry Letters · doi:10.1016/j.bmcl.2023.129309 · Cited by 8
Xu, L., Wang, G., Rong, N., Gu, Y., Hu, L., You, H., & Yin, Q. (2023) · Organic Process Research & Development · doi:10.1021/acs.oprd.3c00152 · Cited by 8
ALK-based dual inhibitors: Focus on recent development for non-small cell lung cancer therapy
Liu, Q.-G., Wu, J., Wang, Z., Chen, B., Du, Y., Niu, J.-B., Song, J. H., & Zhang, S. (2025) · European Journal of Medicinal Chemistry · doi:10.1016/j.ejmech.2025.117646 · Cited by 8
Dimou, A., Ou, S. I., & Doebele, R. C. (2019) · JCO Precision Oncology · doi:10.1200/po.19.00013 · Cited by 8
“Repotrectinib is another potent ROS1 inhibitor with activity against many of these secondary mutations; it is not shown in the figure because the RP2D is not known yet for this drug.(29) Cave values were calculated as the ratio of the area under the curve for 0 to 24 hours to 24 hours of the drug at steady state in pa…”
MethodSelf-citationShulman, D. S., Kiwinda, L. V., Edwards, S., Clinton, C. M., Hunt, S., Greenspan, L., Lawler, K., Reaman, G. H., Al‐Sayegh, H., Bona, K. O., et al. (2021) · Cancer Medicine · doi:10.1002/cam4.3791 · Cited by 8
Targeted Therapies in Rare Brain Tumours
Bruno, F., Pellerino, A., Bertero, L., Soffietti, R., & Rudà, R. (2021) · International Journal of Molecular Sciences · doi:10.3390/ijms22157949 · Cited by 8
“A second-generation of NTRK inhibitors includes repotrectinib-TPX-0005 and LOXO195-BAY2731954, that are being explored in clinical trials in order to compare their efficacy with first-generation drugs and, more importantly, to tackle tumour resistance to first line compounds [71,72].”
BackgroundThe oncogenic roles of NTRK fusions and methods of molecular diagnosis
Aref‐Eshghi, E., Lin, F., Li, M. M., & Zhong, Y. (2021) · Cancer Genetics · doi:10.1016/j.cancergen.2021.10.005 · Cited by 8
Recent advances in lung cancer genomics: Application in targeted therapy
Pathak, N., Chitikela, S. D., & Malik, P. S. (2021) · Advances in genetics · doi:10.1016/bs.adgen.2021.08.004 · Cited by 9
Metadata
- Authors
- Drilon, A., Ou, S.-H. I., Cho, B. C., Kim, D.-W., Lee, J., Lin, J. J., Zhu, V. W., Ahn, M.-J., Camidge, D. R., Nguyen, J., Zhai, D., Deng, W., Huang, Z., Rogers, E., Liu, J., Whitten, J., Lim, J. K., Stopatschinskaja, S., Hyman, D. M., Doebele, R. C., Cui, J. J., & Shaw, A. T.
- Affiliations
- Memorial Sloan Kettering Cancer Center (US)
- University of California, Irvine (US)
- Yonsei University (KR)
- Seoul National University Hospital (KR)
- Samsung Medical Center (KR)
- Harvard University (US)
- University of Colorado Anschutz (US)
- 8TP Therapeutics Inc., San Diego, California.
- Corresponding author
- Cui, J. Jean
- Shaw, Alice T.
- ORCID
- Venue
- Cancer Discovery
- Published
- 2018-10-01
- Volume
- 8
- Issue
- 10
- Pages
- 1227-1236
- ISSN
- 2159-8274 (ISSN-L)
- 2159-8290
- OpenAlex
- W2885875860
- Cited by
- 504
- References
- 23
- Citations by year
- 2026: 48 · 2025: 64 · 2024: 71 · 2023: 66 · 2022: 69 · 2021: 83 · 2020: 62 · 2019: 37 · 2018: 4
- FWCI
- 35.60
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Cancer Discovery (publishedVersion)
- PubMed (publishedVersion)
- Seoul National University Open Repository (Seoul National University) (submittedVersion)
- Topics
- Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer Mechanisms and Therapy
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer Genomics and Diagnostics
- Keywords
- repotrectinib, ROS1, TRK, anaplastic lymphoma kinase, tyrosine kinase inhibitors, solvent-front mutations, acquired drug resistance, NTRK3 fusion, kinase domain mutations
- MeSH terms
- Humans, Mutation, Protein-Tyrosine Kinases, Proto-Oncogene Proteins, Protein Kinase Inhibitors
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