An interventional study of Liquid Biopsy in Glioma and Circulating Tumor Cell, sponsored by Corporacion Parc Tauli. Recruiting at 1 site in Spain. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2023-08-30.
Sponsored by Corporacion Parc Tauli · Not applicable, Interventional, and Diagnostic
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.
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.
Exclusion Criteria:
* 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.
Diagnostic Test: Liquid Biopsy
Analysis of the circulating free DNA in blood patients affected by gliomas
Circulating free DNA detection
Circulating free DNA detection in blood samples of patients by means of a ddPCR
Time frame: 1 year (2023-2024)
Plan to share: No
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Corporacion Parc Tauli