ArticleSignal transduction and targeted therapy2024
First-in-human, phase 1 dose-escalation and dose-expansion study of a RET inhibitor SY-5007 in patients with advanced RET-altered solid tumors.
Article in Signal transduction and targeted therapy, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05278364 (A Phase I/II, Open-Label, Single-arm, Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Antineoplastic Activity of SY-5007 in Patients With RET-altered Advanced Solid Tumor.), which is not on this map. Cited by 5 papers.
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The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
A Phase I/II, Open-Label, Single-arm, Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Antineoplastic Activity of SY-5007 in Patients With RET-altered Advanced Solid Tumor.
Who cites it
5 citing papers in PubMed.
- Safety, pharmacokinetics and efficacy of HA121-28 in patients with advanced solid tumors and RET fusion-positive non-small-cell lung cancer: a multicenter, open-label, single-arm phase 1/2 trial.Signal transduction and targeted therapy · 2025Trial
- Targeted therapies in the management of advanced medullary thyroid cancer.The oncologist · 2026Review
- The use of pharmacodynamic results for recommended phase II decision making in oncology clinical trials.Cancer chemotherapy and pharmacology · 2026Review
- Advances in targeted therapies for pediatric tumors.Acta pharmacologica Sinica · 2026Article
- Targeted therapy in thyroid cancer: molecular alterations and clinical management.Frontiers in endocrinology · 2026Review
Corrections and comments
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Authors and funding
16 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Oncogenic RET alteration is an important, tissue-agnostic therapeutic target across diverse cancers. We conducted a first-in-human phase 1 study on SY-5007, a potent and selective RET inhibitor, in patients with RET-altered solid tumors. Primary endpoints were safety, maximum tolerated dose (MTD), and recommended phase 2 dose (RP2D). Secondary endpoints included pharmacokinetics and preliminary anti-tumor activity. A total of 122 patients were enrolled (17 in dose-escalation phase and 105 in dose-expansion phase), including 91 with non-small cell lung cancer, 23 with medullary thyroid cancer, 7 with papillary thyroid cancer and 1 with gastric cancer. Treatment-related adverse events (TRAEs) were reported in 96.7% of patients, with the most common grade ≥ 3 TRAEs being hypertension (22.1%), diarrhea (16.4%), hypertriglyceridemia (6.6%), and neutropenia (6.6%). The exposure to SY-5007 was dose proportional. Among the 116 efficacy-evaluable patients, the overall objective response rate (ORR) was 57.8%, with 70.0% in treatment-naïve patients and 51.3% in previously treated patients. The median progression-free survival (PFS) was 21.1 months. Efficacy was observed regardless of tumor types and previous therapies. Biomarker analysis of 61 patients with circulating tumor DNA (ctDNA)-detectable RET alterations showed an ORR of 57.4% and median PFS of 13.8 months. Rapid ctDNA clearance of RET alteration correlated with faster responses and improved outcomes. In relapsed patients, off-target induced resistance was observed in 57.1% (12/21), with no on-target RET alterations identified. In conclusion, SY-5007 was well-tolerated and showed promising efficacy in patients with RET-altered solid tumors. Serial ctDNA monitoring may unveil treatment response and potential resistance mechanisms (NCT05278364).
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