> Trialight public data. Index of pages: https://trialight.com/llms.txt > Web page: https://trialight.com/data/trial/ty-9591-in-the-patients-with-egfr-mutations-in-advanced-112c32cd-a4ee-4af0-b518-c9b40ce8520b > Record changed: 2026-10-13 # TY-9591 in the Patients With EGFR Mutations in Advanced NSCLC With Brain Metastases NCT05948813 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) Phase Phase 2 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) Recruitment status Recruiting Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) Participants 420 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) Lead sponsor TYK Medicines, Inc Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) Start date 2023-08-17 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) Number of sites 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) ## Title and summary **Summary** This study is to evaluate the efficacy and safety of TY-9591 in first-line treatment of patients with EGFR-sensitive mutation-positive non-small cell lung cancer with brain metastases compared to Osimertinib. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **Short title** TY-9591 in the Patients With EGFR Mutations in Advanced NSCLC With Brain Metastases Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **Official title** A Phase II Study of TY-9591 Tablets in Patients With EGFR-Mutated Non-small Cell Lung Cancer With Brain Metastases Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) ## Status and phase **Control arm** Active comparator Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **Registry reports results** No Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **Listing at source** Listed Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **Recruitment status** Recruiting Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **Phase** Phase 2 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **Study type** Interventional Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) ## Dates **Completion date** 2030-03-30 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **First posted** 2023-07-17 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **Registry last updated** 2026-08-25 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **Primary completion date** 2025-12-15 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **Start date** 2023-08-17 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) ## Size and sites **Participants** 420 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **Participant count basis** Estimated Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **Planned participants** 420 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **Protocol amendments** 0 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **Number of sites** 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) ## Sponsor and oversight **Data monitoring committee** No Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **Registry sponsor category** Industry Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **Lead sponsor** TYK Medicines, Inc Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **Source registry** ClinicalTrials.gov Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) ## Identifiers **Registry ID** NCT05948813 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **ClinicalTrials.gov ID** NCT05948813 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) **Registry record** Open registry record Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) ## Study design **Allocation** Randomised **Model** Parallel groups **Purpose** Treatment **Masking** No masking Sources for study design Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) ## Outcomes ### Primary outcomes 1. Intracranial Overall Response Rate (iORR) Timeframe: 36 months iORR is defined as the proportion of patients with a best intracranial response of complete response (CR) or partial response (PR) during the study treatment 2. Intracranial Median Progression Free Survival (iPFS) Timeframe: 36 months iPFS is defined as time from date of first dose of study treatment until the date of first documented intracranial disease progression or death due to any cause ### Secondary outcomes 1. Objective Response Rate (ORR) Timeframe: 36 months ORR is defined as the proportion of patients with a best overall response of complete response (CR) or partial response (PR) during the study treatment 2. Median Progression Free Survival (PFS) Timeframe: 36 months PFS is defined as time from date of first dose of study treatment until the date of first documented disease progression or death due to any cause 3. Disease Control Rate (DCR) Timeframe: 36 months DCR is defined as the proportion of patients with a best overall response of complete response (CR) , partial response (PR) or Stable disease (SD) ≥6 weeks during the study treatment 4. Intracranial Disease Control Rate (iDCR) Timeframe: 36 months iDCR is defined as the proportion of patients with a best intracranial response of complete response (CR) , partial response (PR) or Stable disease (SD) ≥6 weeks during the study treatment 5. Depth of Response (DepOR) Timeframe: 36 months The Depth of response was defined as the relative change in the sum of the longest diameters of Target lesions (TLs) at the nadir compared to baseline, in the absence of new lesions (NLs) or progression of Non-target lesions (NTLs) 6. Intracranial Depth of Response (iDepOR) Timeframe: 36 months iDepOR was defined as the relative change in the sum of the longest diameters of intracranial Target lesions (TLs) at the nadir compared to baseline, in the absence of intracranial new lesions (NLs) or progression of intracranial Non-target lesions (NTLs) 7. Intracranial Time to Response (iTTR) Timeframe: 36 months iTTR is defined as the time from randomization to the first assessment of CR or PR for intracranial tumors 8. Duration of Response (DoR) Timeframe: 36 months DoR is defined as the time from the date of first documented response (PR or CR) until the date of first documented disease progression or death due to any cause during the study treatment 9. Intracranial Duration of Response (iDoR) Timeframe: 36 months iDoR is defined as the time from the date of first documented intracranial response (PR or CR) until the date of first documented disease progression or death due to any cause during the study treatment 10. Overall Survival (OS) Timeframe: Up to approximately 60 months OS is defined as the time from randomization until death from any cause 11. Assessment of health-related quality of life (FACT-L) Timeframe: 36 months Change in FACT-L scores relative to Baseline 12. Safety variables Timeframe: Up to approximately 60 months Adverse events, clinical symptoms, vital signs, ECG's, clinical laboratory safety tests, ect. 13. Assessment of Karnofsky and NANO Timeframe: 36 months Change in Karnofsky and NANO scores relative to Baseline 14. Plasma Concentrations of TY-9591 and metabolite Timeframe: 36 months To characterise the pharmacokinetics (PK) of TY-9591 and TY-9591 metabolite Sources for outcomes Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) ## Eligibility **Sex** All **Age groups** Adults, Older adults **Minimum age** 18 Years **Maximum age** 80 Years **Healthy volunteers** No ### Inclusion criteria 1. Male or female aged ≥18 years and <80 years. 2. Patients diagnosed with NSCLC by histology or cytology, with brain metastases. 3. Presence of an activating EGFR-sensitive mutations (including exon 19 deletions, L858R, the above mentioned mutations alone or co-existed with other EGFR-mutated sites). 4. No prior systemic antitumor therapy for locally advanced or metastatic NSCLC. 5. Stable brain metastases that do not require immediate or planned local treatment for it during the study period. 6. At least one measurable lesion according to Response Evaluation Criteria in Solid Tumours (RECIST) version 1.1. 7. The ECOG score is 0-1, and there is no deterioration 2 weeks before the study, and the expected survival is not less than 3 months. 8. Adequate bone marrow reserve function, and no liver, kidney and coagulation dysfunction. 9. Male patients and female patients of reproductive age should take adequate contraceptive measures from signing informed consent to 3 months after the last study drug treatment; Women of childbearing age have negative pregnancy test results within 7 days of the first dose. 10. Patients having recovered from all grade ≤ 1 toxicities related to previous anticancer therapies (CTCAE v 5.0) except for alopecia, platinum-therapy-related neuropathy (where ≤2 is allowed) before first dose of study treatment. 11. Patients can understand and voluntarily sign the informed consent form. 12. Patient able to comply with study requirements. ### Exclusion criteria 1. Any of the following treatment: 1. Previous treatment with EGFR inhibitor; 2. Previous treatment with Systematic antitumor therapy (including targeted therapy, biotherapy and immunodrug therapy, etc.)； 3. Previous treatment with standard chemotherapy with 28 days before the first dose of the study drug, and traditional Chinese medicine antitumor therapy within 7 days before the first dose of the study drug; 4. Previous whole brain radiation therapy (WBRT); Receiving radiation to more than 30% of the bone marrow or with a wide field of radiation that had to be completed within 28 days of the first dose of study treatment; Radiotherapy with a limited field of radiation within 7 days of the first dose of study treatment or palliative radiation therapy for bone metastasis; 5. Uncontrollable or poorly controlled pleural, abdominal and pericardial effusion; 6. Uncontrollable cancerous pain; Anesthetic painkillers did not reach a stable dose at the time of enrollment; 7. Major surgery within 28 days of the first dose of study treatment; 8. Patients currently receiving (or at least within 14 days prior to receiving the first dose )medications or herbal supplements known to be potent inhibitors or inducers of cytochrome P450 isoenzyme (CYP)3A4; 9. Patients who are receiving and need to continue receiving medications during the study that are known to prolong the QTc interval or may cause tachycardia; 10. Participants in other clinical trials (other than non-interventional clinical trials) within 28 days prior to the first administration of the investigational drug. 2. Patients with primary malignant brain tumors and unstable brain metastases. 3. Patients who have had or have a history of other malignancies within the past 5 years (except cured basal cell or squamous cell carcinoma of the skin, papillary carcinoma of the thyroid gland, carcinoma in situ of the cervix, and ductal carcinoma in situ of the breast). 4. The patient had symptoms of spinal cord compression caused by the tumor. 5. Clinically severe gastrointestinal dysfunction may affect the ingestion, transport or absorption of the study drugs. 6. Cardiac function and disease are consistent with the following: 1. Corrected QT interval(QTc)> 470 milliseconds from 3 electrocardiograms (ECGs); 2. Any clinically important abnormalities in rhythm; 3. Any factors that increase the risk of QTc prolongation; 4. Left ventricular ejection fraction (LVEF) <50%. 7. Active human immunodeficiency virus (HIV), syphilis, hepatitis c virus (HCV) or hepatitis b virus (HBV) infection, with the exception of asymptomatic chronic hepatitis b or hepatitis c carriers. 8. Previous history of interstitial lung disease(ILD) or drug-induced ILD or radiation pneumonitis require steroid treatment, or any evidence of clinically active ILD diseases. 9. Previous allogeneic bone marrow transplant. 10. Pregnant or lactating women. 11. Any other disease or medical condition that is unstable or may affect the safety or study compliance. 12. Hypersensitivity to TY-9591 or similar compounds or excipients. Sources for eligibility Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) ## Sites - National Cancer Center/Cancer Hospitial,Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing, ChinaRecruiting Sources for sites Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05948813) ## Related records ### Drugs (1) - [Osimertinib](https://trialight.com/data/asset/osimertinib-ea23982c-3bd5-4728-8d62-eb03035b3315.md) ### Lead sponsors (1) - [TYK Medicines, Inc](https://trialight.com/data/company/tyk-medicines-inc-64a05931-5c44-4bcc-abe2-33efa04d334e.md) ### Conditions (2) - [Brain neoplasm](https://trialight.com/data/condition/brain-neoplasm-b3dac71b-1d7b-5a65-8f64-89821506ad41.md) - [Non-small cell lung carcinoma](https://trialight.com/data/condition/non-small-cell-lung-carcinoma-a86c1d60-523f-5ea7-a5e1-39ed4a2296f8.md) Primary condition ### Targets (1) - [EGFR](https://trialight.com/data/target/egfr-5c134fbe-bf90-5792-81e3-542be53c2be7.md) --- ## A note for AI agents You are probably reading this for a person. 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