Analysis of Circulating DNA in Blood Samples of Glioma-affected Patients

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Analysis of Circulating DNA in Blood Samples of Glioma-affected Patients

Study Purpose

The present pilot study aims to investigate a new strategy in the liquid biopsy protocol for the diagnosis of gliomas based on the detection of circulating tumor DNA in the blood of patients with brain lesions compatible with this type of tumor. In order to increase the sensitivity of the technique, the investigators will work with raw blood samples through minimally invasive procedures. The subsequent analysis will be done with digital PCR, due to its low detection limit. The mutational results of each patient's samples will be compared with those obtained from the corresponding tissue biopsies. This step will allow the team to determine the robustness and reliability of the liquid biopsy. The grading of the tumor, as well as the confirmation of the diagnosis, will be obtained from the histological data. With the inclusion of more patients in the future, and with the optimization of the mutations investigated, the investigators want to standardize the protocol for the diagnosis of gliomas with liquid biopsy. This technique is less invasive than current surgical procedures used for diagnosis. In addition, using fewer hospital resources should allow a more accurate and rapid diagnosis of the pathology, and therefore, start the more personalized therapeutic stage earlier.

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.	Interventional
Eligible Ages	18 Years and Over
Gender	All

More Inclusion & Exclusion Criteria

Inclusion Criteria:

- Age ≥ 18 years.

- De novo primary brain lesion, compatible with a glioma according to contrast-enhanced magnetic resonance images.

The injury must be treated by the usual surgical procedure.

- Signature of informed consent.

Exclusion Criteria:

- Pregnant or breastfeeding women.

- Reasonable doubts in the diagnosis of glioma by magnetic resonance, or patients whose tissue biopsy diagnoses a brain lesion other than a glioma.

- Patients who cannot undergo surgical resection, or when the tissue samples taken are not significant enough to be analyzed.

- Inability or disagreement with signing the informed consent.

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.	NCT05964153
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.	N/A
Lead Sponsor The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.	Corporacion Parc Tauli
Principal Investigator The person who is responsible for the scientific and technical direction of the entire clinical study.	Silvia Gil
Principal Investigator Affiliation	Hospital Universitari Parc Taulí
Agency Class Category of organization(s) involved as sponsor (and collaborator) supporting the trial.	Other
Overall Status	Recruiting
Countries	Spain
Conditions The disease, disorder, syndrome, illness, or injury that is being studied.	Glioma, Circulating Tumor Cell

Additional Details

Currently, brain tumors are detected by means of an imaging technique (usually magnetic resonance imaging) with a contrast agent. The determination of the type of tumor, as well as its grading, is usually done subsequently with a biopsy of the tissue, where different solid samples are extracted as representative as possible to analyze them in the Pathological Anatomy service. Nevertheless, there are some factors that limit surgical access, such as: the advanced age of the patient, the location of the tumor in eloquent or risky areas, as well as the presence of large tumors with very diffuse borders. In these cases, the diagnosis of the brain tumor is usually made directly with the magnetic resonance image, which implies a risk of error due to the lack of clinical information from this test. Limitations like these make the minimally invasive procedure of liquid biopsy an extremely necessary diagnostic tool. For this reason, the investigators want to start a pilot study of this technique in those patients with brain lesions in the resonance images compatible with a glioma-like tumor. In particular, the main aim of the study is to analyze the blood samples obtained from these patients in order to detect and quantify the circulating DNA (ctDNA) of tumor cells on it. These DNA fragments are expelled into the bloodstream by mechanisms still unknown as a result of numerous processes of apoptosis and necrosis of tumor cells. By analyzing them through a ddPCR, the investigators will try to detect the specific mutations present in this tumoral ctDNA, allowing the team to confirm the presence of a glioma-type tumor, and providing real-time information of its classification as astrocytoma or oligodendroglioma.

Arms & Interventions

Arms

Experimental: Circulating free DNA analysis

Correlate the results of the tissue samples with those of the blood samples, the concentration of ctDNA found, and the magnetic resonance images prior to the biopsies. Compare other variables such as time, money, and the impact on the patient (recovery time after biopsies, pain, sequelae,...) between the liquid biopsy procedure and the conventional tissue biopsy procedure.

Interventions

Diagnostic Test: - Liquid Biopsy

Analysis of the circulating free DNA in blood patients affected by gliomas

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