Serum DNA Analysis: Potential Application for Diagnosis and Prognosis in Brain Cancer.

December 13, 2005 updated by: Hadassah Medical Organization

Numerous studies document the ability of tumors to shed DNA into the blood stream. Circulating DNA can thus be recovered for analyses, representing a surrogate tumor material to test for potential applications in disease diagnosis and prognosis.

Detection of genetic alternation is one of the most important tests for cancer patient since they offen correlated with the clinical course, prognosis and chemosensitivity of primary brain tumors. Currently in brain tumor patients these molecular aberrations can be analyzed only on tumor tissue that was obtained at surgery or biopsy.

Paucity of pathologic samples or poor fixation technique often make the tissue samples unassessable for molecular aberrations.

Therefore, the ability to extract tumor DNA from peripheral blood holds a great clinical significance. Still, the molecular aberration evaluated on serum DNA should be correlated and verified by comparison to standard evaluations performed on tumor samples. Our study aim is to evaluate the feasibility of using serum DNA for routine diagnosis of tumor molecular aberrations.

Study Overview

Status

Unknown

Conditions

Detailed Description

Backround:

Genetic and epigenetic abrasions like loss of hetherozygosity and hypermethylation of gene promoters are common aberration in gliomas. Detection of these aberrations serves as diagnostic and prognostic tool. Examples: 1. oligodendrogliomas patients with combined 1p/19q LOH within the tumor respond better to chemotherapy and have better prognosis, whereas LOH on chromosome 10q is a marker for worse prognosis. 2. GBM patients with hypermethylation of the promoter of methyl-guanine-methyl-transferase (MGMT) in the tumor respond better to alkylating agent and have better prognosis.

As sample materials for diagnosis should be easily accessible by a minimally invasive procedure, there has been much interest in the potential use of nucleic acid markers in the blood of patients with cancer.

It was demonstrated that LOH as well as hypermethylation could be detected in the plasma/serum of patients with a variety of malignancies, suggesting that circulating tumor-associated DNA in the blood of patients can be a key determinant in predicting genetic and epigenetic abrasions in the tumor.

Objectives of the study:

Main objective: to find whether genetic abrasions in serum DNA represent the tumor DNA in patients with brain tumor.

Is tumor DNA can be detected in the serum of only high grade tumors or also in low grade tumor?

Methods:

Blood serum and tumor of patients are obtained anonymously, after the patient has signed a consent form, prior to surgery as part of the procedure for tissue collection for the brain tumor bank at Hadassah.

Part of the tumor is stained with hematoxylin-and-eosin and Histopathologic diagnosis is performed by a pathologist.

DNA is extracted from whole blood, serum and tumor of all patients with low grade or high grade gliomas.

In order to determine whether serum DNA represents the tumor DNA, LOH of 1p,19q,10q,17p,13q, 9p as well as methylation status of MGMT promoter will be tested in DNA samples from blood, serum and tumor.

Study Type

Observational

Enrollment (Anticipated)

60

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Israel
      • Jerusalem, Israel, 91120
        • Hdassah Medical Organization

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

LOW AND HIGH GRADE GLIOMAS

Exclusion Criteria:

NON GLIAL TUMORS

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Hadassah Medical Organization

Investigators

  • Principal Investigator: TALI SIEGAL, MD, Hadassah Medical Organization
  • Study Director: IRIS LAVON, PHD, Hadassah Medical Organization

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

January 1, 2006

Study Registration Dates

First Submitted

December 13, 2005

First Submitted That Met QC Criteria

December 13, 2005

First Posted (Estimate)

December 14, 2005

Study Record Updates

Last Update Posted (Estimate)

December 14, 2005

Last Update Submitted That Met QC Criteria

December 13, 2005

Last Verified

November 1, 2005

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • IRISL1-HMO-CTIL

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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