A Phase 1 interventional study of TLN-499 and Venetoclax in Small Cell Lung Cancer ( SCLC ), Neuroendocrine Cancer and Malignant Pleural Mesotheliomas (Mpm), sponsored by Treeline Biosciences, Inc.. Recruiting at 3 sites in Australia. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-10-01.
Sponsored by Treeline Biosciences, Inc. · Phase 1, Interventional, and Treatment
The purpose of this first-in-human study is to evaluate the safety, tolerability, pharmacokinetics, and preliminary antitumor activity of TLN-499 in combination with venetoclax in participants with relapsed/refractory solid tumors.
1,301 studies on the registry are indexed under Small Cell Lung Carcinoma; 367 are open to participants now.
This study's planned enrollment of 120 is above the median of 56 across 1,077 interventional studies indexed under Small Cell Lung Carcinoma.
Browse Small Cell Lung Carcinoma studies →Treeline Biosciences, Inc. is the lead sponsor of 4 studies on the registry; 3 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).
Your pathology report is the document that shows this.
Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.
The amount of disease can be tracked with a defined measurement, so the study can see whether it shrinks or grows. It might be a tumour measured on a scan or, in some blood cancers such as myeloma, a marker measured in blood or urine.
The criteria or the study team say which measurement counts — having no tumour visible on a scan does not by itself rule you out.
The standard rules for measuring tumours on CT or MRI scans, to tell whether a cancer is shrinking, stable or growing during treatment.
“Measurable disease per RECIST 1.1” usually means at least one tumour 10 mm or more at its longest on a CT scan, or a lymph node 15 mm or more across its short axis.
Versions of RECIST adapted to particular cases. iRECIST is for immunotherapy, where a tumour can look bigger for a while before it shrinks, so growth has to be confirmed on a later scan. mRECIST usually means the version for liver cancer (hepatocellular carcinoma), which measures only the part of a tumour that still has a blood supply.
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Cancer deposits in the brain from a cancer that started elsewhere in the body (CNS metastases include the spinal cord).
Studies differ: some leave out any brain metastases, some accept ones treated and stable for some weeks. Check what this study allows.
Histologically or cytologically confirmed
The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).
Your pathology report is the document that shows this.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Relapsed and refractory
Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Measurable disease
The amount of disease can be tracked with a defined measurement, so the study can see whether it shrinks or grows. It might be a tumour measured on a scan or, in some blood cancers such as myeloma, a marker measured in blood or urine.
The criteria or the study team say which measurement counts — having no tumour visible on a scan does not by itself rule you out.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
RECIST
The standard rules for measuring tumours on CT or MRI scans, to tell whether a cancer is shrinking, stable or growing during treatment.
“Measurable disease per RECIST 1.1” usually means at least one tumour 10 mm or more at its longest on a CT scan, or a lymph node 15 mm or more across its short axis.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
iRECIST and mRECIST
Versions of RECIST adapted to particular cases. iRECIST is for immunotherapy, where a tumour can look bigger for a while before it shrinks, so growth has to be confirmed on a later scan. mRECIST usually means the version for liver cancer (hepatocellular carcinoma), which measures only the part of a tumour that still has a blood supply.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ECOG performance status
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Life expectancy
The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Brain metastases
Cancer deposits in the brain from a cancer that started elsewhere in the body (CNS metastases include the spinal cord).
Studies differ: some leave out any brain metastases, some accept ones treated and stable for some weeks. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Drug: TLN-499 · Drug: Venetoclax
Specified dose on specified days
Specified dose on specified days
Incidence of Dose-Limiting Toxicities (DLTs)
Number of patients experiencing adverse events (AEs) that meet protocol-defined dose-limiting toxicity (DLT) criteria following administration of TLN-499
Time frame: First 35 days of treatment
Incidence of Adverse Events and Serious Adverse Events
Incidence of treatment-emergent adverse events (AEs), serious adverse events (SAEs), adverse events leading to discontinuation, and deaths.
Time frame: Up to approximately 2 years
Overall Response Rate (ORR)
ORR assessed according to RECIST v1.1 (or mRECIST for mesothelioma)
Time frame: Up to approximately 2 years
Maximum Observed Plasma Concentration (Cmax) of TLN-499
Time frame: Up to approximately 2 years
Time to Peak Drug Concentration (Tmax) of TLN-499
Time frame: Up to approximately 2 years
Minimum Observed Plasma Concentration (Cmin) of TLN-499
Time frame: Up to approximately 2 years
Area Under the Plasma Concentration-Time Curve (AUC) of TLN-499
Time frame: Up to approximately 2 years
Duration of Response (DOR)
Time frame: Up to approximately 2 years
Progression-Free Survival (PFS)
Time frame: Up to approximately 2 years
Overall Survival (OS)
Time frame: Up to approximately 2 years
Plan to share: No
No publications or documents are linked to this record.
Started Aug 2026 (actual). Primary completion is estimated for Aug 2030, 48 months after the start.
Of 111 industry-sponsored phase 1 interventional studies under Small Cell Lung Carcinoma, half reached primary completion within 44 months of starting (the median), counting those still running; a quarter within 29 and three quarters within 63. This study's planned 48 months is close to that.
Counting every sponsor, half of 143 studies reached it within 46 months; a quarter within 29 and three quarters within 64.
Start moved once since we started tracking on Sep 25, 2026: Jul 2026 → Aug 2026, on Oct 1, 2026.
Earlier changes are on the record history on ClinicalTrials.gov ↗
How these figures are worked out, and which studies are left out of them.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
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Treeline Biosciences, Inc.