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Chemoradiation and Endothelial Progenitor Cells in Colorectal Cancer

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified March 2006 by Mackay Memorial Hospital.
Recruitment status was:  Recruiting
Information provided by:
Mackay Memorial Hospital Identifier:
First received: May 12, 2006
Last updated: NA
Last verified: March 2006
History: No changes posted

Colorectal cancer (CRC) is one of the common malignancies worldwide, accounting for a significant percentage of cancer mortality. Concurrent chemoradiation (CCRT) is now a standard treatment for unresectable malignancies of anorectum. To improve quality of life, CCRT is also commonly applied in treatment of lower rectal and anal canal cancer to preserve anal sphincter function. The most commonly used chemotherapeutic drugs combined with radiation as radiosensitizers is 5-fluorouracil (5-FU). Circulating endothelial progenitor cells (EPC), which contribute to the tumor vessel formation, reflect the response to chemotherapy both in animal model and clinical trial. Thus, circulating EPC can be used as a marker for optimizing and monitoring the anti-angiogenesis therapy including angiogenesis inhibitors and chemotherapy. Whether circulating EPC can be served as a marker of CCRT efficacy or not remains undetermined. Since CCRT is now a standard treatment of locally advanced and high-risk CRC, the development of a surrogate marker for monitoring CCRT response and optimize treatment intensity is very important.

In this grant we intent to monitor the levels of circulating EPC in locally advanced and high-risk CRC patients before, during and after CCRT. To further characterize the changes in function and biology of EPC caused by CCRT, a syngeneic animal model will be also used to evaluate the clonogenecity and specific gene expression of EPC in tumor-bearing mice receiving CCRT.

Condition Intervention
Colorectal Cancer
Procedure: concurrent chemoradiation

Study Type: Observational
Study Design: Observational Model: Case Control
Time Perspective: Longitudinal
Time Perspective: Prospective
Official Title: The Effect of Concurrent Chemoradiation on Circulating Endothelial Progenitor Cells in Colorectal Cancer

Resource links provided by NLM:

Further study details as provided by Mackay Memorial Hospital:

Estimated Enrollment: 30
Study Start Date: April 2006
  Show Detailed Description


Ages Eligible for Study:   30 Years to 60 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Colorectal cancer patients indicated for chemoradiation

Exclusion Criteria:

  • With major systemic disease including other cancer, diabetes, cardiovacular disease.
  • Received prior chemotherapy or radiotherapy within 1 month
  • Receiving immunosuppressants
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00325871

Contact: Yu-Jen Chen, MD, PhD 886 2 28094661 ext 3060

Mackay Memorial Hospital Recruiting
Taipei, Taiwan, 104
Contact: Yu-Jen Chen, MD, PhD    886 2 28094661 ext 3060   
Principal Investigator: Yu-Jen Chen, MD, PhD         
Sponsors and Collaborators
Mackay Memorial Hospital
Principal Investigator: Yu-Jen Chen, MD, PhD Department of Radiation Oncology, Mackay Memorial Hospital
  More Information

Publications automatically indexed to this study by Identifier (NCT Number): Identifier: NCT00325871     History of Changes
Other Study ID Numbers: MMH-I-S-243 
Study First Received: May 12, 2006
Last Updated: May 12, 2006

Additional relevant MeSH terms:
Colorectal Neoplasms
Intestinal Neoplasms
Gastrointestinal Neoplasms
Digestive System Neoplasms
Neoplasms by Site
Digestive System Diseases
Gastrointestinal Diseases
Colonic Diseases
Intestinal Diseases
Rectal Diseases processed this record on February 24, 2017