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Association of MSI, TS, DPD, MVD and EGFR With Chemosensitivity in Stage IV in Colorectal Cancer

The recruitment status of this study is unknown because the information has not been verified recently.
Verified July 2002 by National Taiwan University Hospital.
Recruitment status was  Active, not recruiting
Sponsor:
Information provided by:
National Taiwan University Hospital
ClinicalTrials.gov Identifier:
NCT00173472
First received: September 12, 2005
Last updated: November 23, 2005
Last verified: July 2002

September 12, 2005
November 23, 2005
July 2002
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Complete list of historical versions of study NCT00173472 on ClinicalTrials.gov Archive Site
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Association of MSI, TS, DPD, MVD and EGFR With Chemosensitivity in Stage IV in Colorectal Cancer
Association of MSI, TS, DPD, MVD and EGFR With Chemosensitivity in Stage IV in Colorectal Cancer

The present project will follow our previous phaseⅡ study of FOLFOX regimens for the treatment of stage Ⅳ colorectal cancer. We will recruit at least 200 patients for this study. The selection of patients will be based on rigorous eligibility criteria. The patients will be allocated based on the expression of each molecular marker (MSI, TS, DPD, MVD and EGFR) and the implementation of chemotherapy. For example, in the examination for the clinical implications of EGFR, the patients will be classified into four groups: EGFR(+) chemotherapy(+); EGFR(+) chemotherapy(-); EGFR(-) chemotherapy(+); EGFR(-) chemotherapy(-). Base on the analysis of this 2×2 table, we will clarify the prognostic significance of a specific molecular marker is due to whether the specific molecular marker predicts biological invasiveness and/or chemosensitivity. We believe the present study will have the following significance: (1)To further clarify the mechanisms for the carcinogenesis and progression of CRC; (2)To facilitate the development of novel chemotherapeutic agents; and (3) To gain the experience for the practice of evidence-based medicine.

Stage IV disease represented approximately 25% of all colorectal cancer (CRC) cases. The mainstay treatment for stage IV CRC is chemotherapy and surgery is only for palliation of symptoms including colorectal bleeding and obstruction. If patients with stage IV CRC were not treated, the average survival time was 6 months. Recently, with the progress of chemotherapeutic agents, such as oxaliplatin and irinotecan, the stage IV patients’ average survival time considerably increased to 18 months. However, the currently utilized chemotherapeutic regimens, including FOLFOX (Folinic acid + 5-Fu +oxaliplatin) and FOLFIRI (Folinic acid + 5-Fu + irinotecan), their response rate was only around 50-60%. Moreover, these agents had several severe side-effects, such as neurotoxicity and diarrhea. Therefore, it is mandatory for us to seek clinicopathogical parameters or novel molecular markers that predicted chemosensitivity, in terms of increase of response rate and avoidance of side-effects. Recently, the carcinogenesis of CRC was better clarified than before. Some molecular markers, such as p53, K-ras, microsatellite instability (MSI), microvessel density(MVD), and epidermal growth factor receptor(EGFR), and their relation to survival of colorectal cancer patients have become the focus of research.

The present project basically follows our previous study that p53 overexpression predict poorer chemosensitivity(Liang et al. Int. J. Cancer 2002; 97: 451-457), and we plan to further explore the association between chemosensitivity with MSI-H, MVD, and EGFR. In fact, in either FOLFOX or FOLFIRI, they all belong to 5-Fu-based therapy. Therefore, the tumor expression of enzymes related to the metabolism of 5-Fu, such as thymidylate synthase(TS)and dipyrimidine dehydrogenase(DPD), have also become the hot issue of research. In this project, we will explore the clinical implications of MSI, TS, DPD, MVD, and EGFR. This is because our previous study has indicated that MSI-H is a marker of mutator phenotype of colorectal cancer, i.e., colorectal cancers with MSI-H tend to have multiple mutations of downstream genes, especially those with repetitive microsatellite sequences within the genes. Our previous study has shown MSI-H predicted better chemosensitivity(Liang et al. Int. J. Cancer 2002; 101: 519-525). Therefore, we are curious to know that if MSI-H is related to the alterations of TS and DPD in the tumor, i.e., if the alterations for the tumor levels of TS and DPD is one of the mechanisms for the better chemosensitivity in tumors with MSI-H. On the other hand, it has been known that EGFR is related to tumor growth, invasion, angiogenesis, and metastasis of colorectal cancers. Therefore, it is mandatory to further dissect the correlation between EGFR and MVD. To the best of our knowledge, this has not been published before.

The present project will follow our previous phaseⅡ study of FOLFOX regimens for the treatment of stage Ⅳ colorectal cancer. We will recruit at least 200 patients for this study. The selection of patients will be based on rigorous eligibility criteria. The patients will be allocated based on the expression of each molecular marker and the implementation of chemotherapy. For example, in the examination for the clinical implications of EGFR, the patients will be classified into four groups: EGFR(+) chemotherapy(+); EGFR(+) chemotherapy(-); EGFR(-) chemotherapy(+); EGFR(-) chemotherapy(-). Base on the analysis of this 2×2 table, we will clarify the prognostic significance of a specific molecular marker is due to whether the specific molecular marker predicts biological invasiveness and/or chemosensitivity. After the analysis of prognostic significance of each molecular marker, we will explore the interrelationship between these molecular markers. Also, all these 5 molecular markers and various clinicopathological factors will be subjected to multivariate analysis. Because the survival of stage Ⅳ CRC patients will generally not exceed 30 months, the patients study will not have to be followed up for a long time before the final study result appears. We believe the present study will have the following significance: (1)To further clarify the mechanisms for the carcinogenesis and progression of CRC; (2)To facilitate the development of novel chemotherapeutic agents; and (3) To gain the experience for the practice of evidence-based medicine.

Observational
Observational Model: Defined Population
Primary Purpose: Screening
Time Perspective: Longitudinal
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Colorectal Cancer
Drug: Chemotherapy
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*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Active, not recruiting
200
July 2005
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Inclusion Criteria:

  • The patients recruited met the following eligibility criteria: (1) The sporadic primary colorectal cancer could be palliatively resected and pathologically confirmed as adenocarcinoma; (2) The metastatic lesions were measurable but unresectable; (3) Karnofsky performance status was ≧50%; (4) The life expectancy was greater than 12 weeks; (5) WBC count was ≧4,000/μL, platelet count was ≧100,000/μL, serum bilirubin was ≦2.0 mg/dL, and serum glucose and electrolyte were normal.

Exclusion Criteria:

  • Patients with evident family history of colorectal cancer suggestive of familial adenomatous polyposis (FAP) or hereditary nonpolyposis colorectal cancer (HNPCC) were excluded from this study. Moreover, patients with evident carcinosis peritonitis were excluded from this study because their bowel function could not be restored through palliative operation and their prognosis was considered as very poor.
Both
18 Years to 75 Years
No
Contact information is only displayed when the study is recruiting subjects
Taiwan
 
NCT00173472
9461700674
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National Taiwan University Hospital
Not Provided
Principal Investigator: Jin-Tung Liang, M.D., Ph.D. Department of Surgery, National Taiwan University Hospital, No.7, Chung-Shan South Road, Taipei, TAIWAN, R.O.C.
National Taiwan University Hospital
July 2002

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP