An Analysis of the Response of Human Tumor Microvascular Endothelium to Ionizing Radiation

July 23, 2014 updated by: Memorial Sloan Kettering Cancer Center
Doctors will take some tissue from the tissue removed during surgery in order to study how the blood vessels of the tumor respond to radiation therapy. The tissue obtained will be used to determine how these tumor blood vessels respond to radiation therapy delivered to the tumor, after it has been removed. This radiation is delivered in the research lab. This research is being conducted in order to develop new methods to treat tumors by radiation therapy. No additional surgery will be performed to obtain these samples, and only materials that remain after all diagnostic testing has been completed will be used.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

The goal of this study is to determine if concepts established in mouse models of the tumor microvascular response to ionizing radiation (IR) therapy are applicable to human tumors in order to begin to establish that the engagement of the endothelial response is a valid target for IR in human tumors. A portion of tumor will be isolated from individuals who have signed informed consent for this protocol and are undergoing surgery on the Neurosurgery, Colorectal, and Gynecology, Head and Neck, Urology, and Hepatobiliary Services at Memorial Sloan-Kettering Cancer Center. Tumor tissue will be obtained from the surgical sample in pathology after adequate specimens have been obtained for diagnostic purposes. Tumor tissue will be irradiated ex vivo and the microvascular endothelial response will be determined. From specimens of adequate size, a pure tumor endothelial cell population will be isolated and the response to IR will be determined.

Primary Outcomes:

  • To determine if human tumor microvascular endothelium displays similar dose parameters as mouse tumor endothelium.

Secondary Outcomes:

  • To determine if tumor endothelium isolated to near homogeneity demonstrates dose parameters similar to those used in single dose radiotherapy of brain tumors.
  • To determine if the microvascular endothelium of tumors of different types behaves in a similar fashion in its response to IR.

Study Type

Observational

Enrollment (Actual)

149

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

  • United States
    • New York
      • New York, New York, United States, 10065
        • Memorial Sloan-Kettering Cancer Center

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

19 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

undergoing surgery on the Neurosurgery, Hepatobiliary, Colorectal, Urology, Head and Neck, Gynecology, GMT and Thoracic Services at Memorial Sloan- Kettering Cancer Center.

Description

Inclusion Criteria:

  • Patients who are felt to have adequate tumor volume for these studies, at least a 2 x 2 x 2 cm3 tumor by physical exam, imaging studies or colonoscopy reports
  • Primary or recurrent tumors are eligible
  • Patients must be suitable candidates for surgery
  • Patients who have signed the informed consent

Exclusion Criteria:

  • Patients who are not considered suitable candidates for surgery
  • Patients who have received prior radiation therapy to the tumor being removed
  • Patients who have received chemotherapy within 6 months of tumor removal
  • Patients who are pregnant
  • Patients may choose to be excluded at any time
  • Minors are excluded from this study because there are expected to be very few minors with the tumor types which the investigators are evaluating in this study

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

  • Observational Models: Cohort
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
A
The experiments in Group A will be conducted in order to determine if human tumor microvascular endothelium displays similar dose parameters as mouse tumor endothelium, and if the microvascular endothelium of tumors of different types behaves in a similar fashion in its response to IR.
Radiation: Ionizing radiation (IR) therapy
Tumors will be sliced into 0.5cm fragments, incubated in culture medium and then irradiated to evaluate the kinetics and dose-dependencies of the endothelial apoptotic response. We will irradiate tumor fragments ex vivo at 0, 7, 13, 15, 17, and 25 Gy.
B
The experiments in Group B will be conducted in order to determine if tumor endothelium isolated to near homogeneity demonstrates dose parameters similar to those used in single dose radiotherapy of brain tumors.
Radiation: Ionizing radiation (IR)
Tissue fragments of a total quantity of at least a 4x4x4 cm3 will be required. For each tumor a paraffin block will also be made for routine staining and IHC. Endothelial cell populations (at least 500 cells) will then be exposed to radiation at 0, 7, 11, 13, 15, 17, and 25 Gy and harvested at 4, 5 and 8 hours post IR.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
apoptotic response
Time Frame: 2 years
The peak apoptotic radiation response will be obtained for each of the tumor type and the result compared to that of the mouse experiments in Garcia-Barros (no formal testing only qualitative statements).
2 years

Collaborators and Investigators

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

Sponsor

Memorial Sloan Kettering Cancer Center

Collaborators

National Cancer Institute (NCI)

Investigators

  • Principal Investigator: Michael Zelefsky, M.D., Memorial Sloan Kettering Cancer Center

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

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

August 1, 2004

Primary Completion (Actual)

July 1, 2014

Study Completion (Actual)

July 1, 2014

Study Registration Dates

First Submitted

August 18, 2005

First Submitted That Met QC Criteria

August 19, 2005

First Posted (Estimate)

August 22, 2005

Study Record Updates

Last Update Posted (Estimate)

July 24, 2014

Last Update Submitted That Met QC Criteria

July 23, 2014

Last Verified

July 1, 2014

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 04-109

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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