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

NCT ID: NCT05964153

Last Updated: 2023-08-30

Basic Information

• Recruitment Status: UNKNOWN
• Clinical Phase: NA
• Total Enrollment: 10 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2023-01-31
• Study Completion Date: 2024-01-31

Brief Summary

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.

Detailed Description

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.

Conditions

Glioma; Circulating Tumor Cell

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: DIAGNOSTIC
• Blinding Strategy: NONE

Study Groups

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.

Group Type: EXPERIMENTAL

Liquid Biopsy

Intervention Type: DIAGNOSTIC_TEST

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

Interventions

Liquid Biopsy

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

Intervention Type: DIAGNOSTIC_TEST

Eligibility 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.

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Corporacion Parc Tauli

OTHER

Sponsor Role: lead

Responsible Party

Silvia Gil-Duran

Principal Investigator

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Silvia Gil

Role: PRINCIPAL_INVESTIGATOR

Hospital Universitari Parc Taulí

Locations

Hospital Universitari Parc Taulí

Sabadell, Barcelona, Spain

Site Status: RECRUITING

Countries

Spain

Central Contacts

Coloma Moreno

Role: CONTACT

cmoreno@tauli.cat

+34937231010

Facility Contacts

Silvia Gil, PhD

Role: primary

sgil@tauli.cat

+34937231010

Other Identifiers

I3PT_SG2022_01

Identifier Type: -

Identifier Source: org_study_id