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Drug Response Testing and Repurposing Using Glioblastoma Organoid

Study Purpose

The aim of this observational study, based on a prospectively collected cohort, is to evaluate the prognostic value of patient-derived organoids in predicting responses to conventional and repurposing drugs, including temozolomide, in patients with primary or recurrent glioblastoma. The primary question is whether the patient's response to temozolomide is recapitulated in their corresponding patient-derived glioblastoma organoid (GBO). Patient drug responses are evaluated using survival data, while GBO drug responses are assessed through a drug-response testing platform utilizing cell viability assays. Additionally, this platform is used to explore the potential application of various chemotherapeutic agents.

Recruitment Criteria

Accepts Healthy Volunteers Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms	No
Study Type An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes. An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes. Searching Both is inclusive of interventional and observational studies.	Observational [Patient Registry]
Eligible Ages	N/A and Over
Gender	All

More Inclusion & Exclusion Criteria

Inclusion Criteria:

- primary or recurrent glioblastoma.

- patients treated with standard treatment including surgery and temozolomide based chemoradiation therapy.

- sufficient tumor sample is available for organoid culture.

Exclusion Criteria:

- patients who are not underwent concurrent chemoradiation therapy (CCRT) following surgery.

- failed to obtain MRI scan after CCRT.

- patients refusal

Trial Details

Trial ID: This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.	NCT06782984
Phase Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans. Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data. Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs. Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.
Lead Sponsor The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.	Chungnam National University Hospital
Principal Investigator The person who is responsible for the scientific and technical direction of the entire clinical study.	Kyung Hwan Kim, MD, PhDKijoon Yoon, PhD
Principal Investigator Affiliation	Department of Neurosurgery, Chungnam National University HospitalKorea Advanced Institute of Science and Technology
Agency Class Category of organization(s) involved as sponsor (and collaborator) supporting the trial.	Other
Overall Status	Recruiting
Countries	Korea, Republic of
Conditions The disease, disorder, syndrome, illness, or injury that is being studied.	Glioblastoma, Organoid

Additional Details

Glioblastoma multiforme (GBM) remains a highly aggressive brain tumor with limited treatment options and a poor prognosis. Temozolomide (TMZ) is the only approved first-line therapy, but frequent resistance limits its efficacy, highlighting the urgent need for alternative treatments. Patient-derived glioblastoma organoids (GBOs) offer a promising preclinical model for personalized drug testing and therapy development. In our previous study, we established 20 GBO lines using a serum-free protocol, preserving the histopathological and genomic features of the parental tumors. Additionally, GBO Drug Sensitivity Testing (GBO-DST) was developed to evaluate TMZ responsiveness and to screen several FDA-approved drugs, including Lazertinib and Regorafenib. The GBO-DST was successfully validated by correlating IC50 values with progression-free survival, GBO size measurement after treatment, and histopathological evaluation. The goal of this study is to investigate whether a preclinical model using GBOs can eventually replace clinical trials. Therefore, it is necessary to collect diverse genetic information from patients in a multicenter setting, along with corresponding GBOs that recapitulate the patient tumors. Using GBO-DST, external cohort validation will be performed. Concurrently, the study aims to predict the potency of multi-kinase inhibitors or EGFR-TKIs, which are expected to show efficacy based on prior research, and compare these predictions against clinical outcomes. This study aims to establish 100 GBO lines, targeting the enrollment of 150 patients, considering a previous success rate of 66.7% for GBO establishment. Since the study requires tumor tissue and genetic information from patients, IRB approvals from multiple institutions have been secured (including five tertiary hospitals in South Korea: Chungnam National University Hospital, Soonchunhyang University Hospital, Keimyung University Hospital, Yeungnam University Hospital, and Dong-A University Hospital). However, as this study retrospectively correlates patient clinical outcomes with GBO-DST results, it does not involve direct interventions with patients. Specifically, GBO-DST results for multiple candidate drugs will not be used to alter patients' treatment regimens. The study collects clinical information and genetic data from patients, with clinical outcomes defined as progression-free survival and overall survival. Radiologic data will be prospectively collected to achieve these objectives. Through this study, we aim to validate the findings of previous research by confirming that GBO-DST accurately recapitulates patients' drug responses. Furthermore, we seek to establish GBO-DST as a preclinical trial platform capable of replacing traditional clinical trials.

Arms & Interventions

Arms

: glioblastoma

prospectively enrolled

Interventions

Other: - Organoid-based drug sensitivity test

The intervention in this study involves utilizing glioblastoma organoids (GBOs) to perform an organoid-based drug sensitivity test (DST) and retrospectively comparing the results with clinical outcomes. Notably, no interventions will be applied to participants based on GBO-DST results; the study is limited to retrospective analysis. The GBO-DST is conducted by performing a drug response assay with temozolomide to determine the half-maximal inhibitory concentration (IC50), which serves to classify GBOs as TMZ-sensitive or TMZ-resistant. This classification is further validated through GBO cell survival analysis.

Contact a Trial Team

If you are interested in learning more about this trial, find the trial site nearest to your location and contact the site coordinator via email or phone. We also strongly recommend that you consult with your healthcare provider about the trials that may interest you and refer to our terms of service below.

International Sites

Chungnam National University Hospital, Daejeon, Chungnam, Korea, Republic of

Status

Recruiting

Address

Chungnam National University Hospital

Daejeon, Chungnam, 35015

Site Contact

Kyung Hwan Kim, MD, PhD

[email protected]

82-42-280-7367

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