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Tundra Space

Clinical Research Directory

Browse clinical research sites, groups, and studies.

3 clinical studies listed.

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Cell Free DNA

Tundra lists 3 Cell Free DNA clinical trials. Each listing includes eligibility criteria, study locations, and direct links to research sites in the Tundra directory.

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RECRUITING

NCT07493928

HPV After chemoRadioTherapy

The HART (HPV After chemoRadiotherapy) study is a prospective multicenter observational trial designed to evaluate the clinical utility of HPV testing in the follow-up of patients treated with definitive chemoradiotherapy (CRT) for cervical cancer. Current surveillance after CRT relies mainly on clinical examination and imaging, while the role of HPV-based molecular monitoring remains insufficiently defined. The study plans to enroll 120 patients with FIGO stage IB-IVA cervical cancer treated with primary radiotherapy with curative intent. HPV detection will be performed using two complementary approaches: PCR-based detection of HPV DNA from a cervical swab and analysis of circulating HPV tumor DNA (ctDNA) in peripheral blood. Samples will be collected before treatment and during follow-up at 3, 12, and 24 months after completion of CRT. The primary objective is to determine the sensitivity of these methods for detecting disease recurrence during a two-year follow-up period. Secondary objectives include evaluation of HPV clearance after treatment, comparison of HPV genotypes before and after therapy in cases of persistence, and comparison of the diagnostic performance of cervical HPV testing and ctDNA detection. The study aims to generate evidence supporting the integration of HPV-based molecular monitoring into routine follow-up, potentially enabling earlier detection of recurrence and more individualized surveillance strategies for patients after CRT for cervical cancer.

Gender: FEMALE

Ages: 18 Years - Any

Updated: 2026-03-25

Cervical Cancer Recurrent
Radiotherapy
Cell Free DNA
+1
RECRUITING

NCT07471373

Pesticides and Infertility: Oxidative Stress Via Circulating Cell-free DNA and Gut/Genital Microbiome Signatures in Women With Endometriosis

This project PestiEndoMicro aims to provide an innovative approach, studying endometriosis under the genital and gut microbiota scope. To realize this project, the investigators are planning to dose cfDNA to assess the oxidative stress caused by endometriosis and study its epigenetics. At the same time, the investigators will take a pragmatic approach by assessing pesticide exposure in these patients and estimate the correlation between gut or genital dysbiosis and chemical agent exposure. Also, the investigators will take the initiative to use classic culture, qPCR techniques, and NGS to establish signatures in vaginal, endometrial and gut microbiota in patients with endometriosis. With these approaches, the goal is to gain more knowledge about endometriosis and optimize early diagnosis by establishing a signature in the genital and gut microbiota, but also by dosing the cfDNA. By doing so the investigators could open new opportunities to develop new therapeutic strategies for endometriosis.

Gender: FEMALE

Ages: 18 Years - 43 Years

Updated: 2026-03-13

Endometriosis
Infertility
Female Fertility
+7
ACTIVE NOT RECRUITING

NCT07224854

Epigenetic Signature for CRC Early Detection

The epiCED is a noninvasive blood-based assay designed for early detection of colorectal cancer (CRC) using circulating cell-free DNA (cfDNA) 5-methylcytosine (5mC) and 5-hydroxymethylcytosine (5hmC) epigenetic markers. This study leverages retrospective, multi-center cohorts of CRC patients and non-cancer controls to discover and validate a robust cfDNA methylation signature. Small-scale sequencing and machine learning-based modeling will be applied to identify a minimal panel of methylation markers that can accurately discriminate CRC from non-cancer individuals, including early-stage disease. The ultimate goal is to develop a clinically practical, noninvasive screening tool that enables population-level early detection and improves patient outcomes.

Gender: All

Ages: 18 Years - Any

Updated: 2025-11-10

1 state

Colorectal Cancer (Diagnosis)
Non-cancer Controls
DNA Methylation
+2