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Irradiation Modulates the Pharmacokinetics of Anticancer Drugs

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 January 2014 by Far Eastern Memorial Hospital.
Recruitment status was:  Enrolling by invitation
Information provided by (Responsible Party):
Far Eastern Memorial Hospital Identifier:
First received: December 19, 2012
Last updated: January 19, 2014
Last verified: January 2014

Radiation therapy (RT) is used as an effective local treatment modality to inhibit cell proliferation, induce cell death and suppress tumor growth. To improve the treatment outcome, in terms of both locoregional control and survival, the concurrent use of chemotherapy during radiation therapy (CCRT) is now the standard treatment for various malignancies, especially locally advanced cancers. Among the drugs used to enhance RT effect, 5-fluorouracil (5-FU) is one of the most commonly used chemotherapeutic agents of CCRT.

In the past, RT was solely used as a local treatment and its effect was estimated by local effect model. However, growing evidence shows that irradiation has direct DNA damage-dependent effects as well as sending signals to neighboring cells. Recently, we reported that abdominal irradiation could significantly modulate the systemic pharmacokinetics of 5-FU at 0.5 Gy, off-target area in clinical practice, and at 2 Gy, the daily treatment dose for target treatment in an experimental rat model. Additionally, the results from a clinical investigation showed that colorectal cancer patients with lower AUC of 5-FU during adjuvant chemotherapy had lower disease-free survival. Taken together, these lines of evidence support the importance and necessity to search for the mediators responsible for the unexpected effect of local RT on systemic pharmacokinetics of chemotherapeutic agents, such as 5-FU.

In the present study, the investigators investigated whether the phenomena and mechanism of RT-PK is a fact for different anticancer drugs in human.

Rectal Cancer
Cervical Cancer

Study Type: Observational
Study Design: Observational Model: Case Control
Time Perspective: Prospective

Further study details as provided by Far Eastern Memorial Hospital:

Primary Outcome Measures:
  • all cause mortality [ Time Frame: one year ]

Biospecimen Retention:   Samples With DNA
whole blood collection

Estimated Enrollment: 40
Study Start Date: July 2011
Estimated Primary Completion Date: December 2015 (Final data collection date for primary outcome measure)
C/T-RT group
Chemotherapy (C/T) is applied in the morning. After 2-4 hrs, radiotherapy (RT) is delivered (according to the clinical practice)
RT-C/T group
Radiotherapy (RT) is delivered in the morning. After 2-4 hrs, chemotherapy (C/T) is applied (according to the clinical practice).


Ages Eligible for Study:   18 Years to 80 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Chemotherapy-naive patients with histologically confirmed, locally advanced rectal adenocarcinoma and cervical cancer, who were prepared for concurrent chemoradiation therapy, were consecutively enrolled in this study

Inclusion Criteria:

  • World Health Organization (WHO) performance status of 0 or 1
  • Age 18-80 years
  • Locally advanced rectal cancer
  • Locally advanced cervical cancer

Exclusion Criteria:

  • Cancer history
  • Abnormal liver and renal disease
  • Immune disease
  • Hematological disease
  Contacts and Locations
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No Contacts or Locations Provided
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Far Eastern Memorial Hospital Identifier: NCT01755585     History of Changes
Other Study ID Numbers: FEMH No. 099148-F
Study First Received: December 19, 2012
Last Updated: January 19, 2014

Keywords provided by Far Eastern Memorial Hospital:
Radiation therapy
Matrix Metalloproteinase

Additional relevant MeSH terms:
Rectal Neoplasms
Uterine Cervical Neoplasms
Colorectal Neoplasms
Intestinal Neoplasms
Gastrointestinal Neoplasms
Digestive System Neoplasms
Neoplasms by Site
Digestive System Diseases
Gastrointestinal Diseases
Intestinal Diseases
Rectal Diseases
Uterine Neoplasms
Genital Neoplasms, Female
Urogenital Neoplasms
Uterine Cervical Diseases
Uterine Diseases
Genital Diseases, Female processed this record on April 28, 2017