Clinical trial NCT02450422: The Detection of Circulating Tumor Cells (CTCs) in Patients With Colorectal Cancer Undergoing Cryosurgery Combined With DC-CIK Treatment
Official title: The Detection of Circulating Tumor Cells (CTCs) in Patients With Colorectal Cancer Undergoing Cryosurgery Combined With DC-CIK Treatment
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Neoplastic Cells, Circulating
Keywords: Colorectal Neoplasms
Circulating Tumor Cells
Lead sponsor: Fuda Cancer Hospital, Guangzhou
Sponsor class: OTHER
First posted: 2015-05-21
Enrollment: 60
Sex: ALL
Minimum age (years): 18
Maximum age (years): 75
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Observational model: COHORT
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Patients with Ⅱ,Ⅲ,Ⅳ stage colorectal cancer come to Fuda Hospital for treatment.

Brief summary: Circulating tumor cells (CTCs) have the potential to provide a surrogate for'real-time biopsy' of tumor biological activity. Enumeration and molecular characterization of CTCs in colorectal cancer could play an important role in diagnosis, predicting the risk for tumor recurrence, and providing novel target therapy biomarkers. In view of these facts, the investigators wanted to demonstrate the value of multiparameter flow cytometry in detecting human tumor cells of colorectal cancer in normal peripheral blood after cryosurgery with or without dendritic cell(DC)-cytokine-induced killers(CIK) treatment, and the investigators also compared the specificity with reverse transcriptase polymerase chain reaction (RT-PCR) method.

Detailed description: 1 day before and 2 days after cryosurgery with or without DC-CIK treatment，approximately 17-mL ethylene diamine tetraacetic acid(EDTA)-blood was drawn by vein puncture from patients with colorectal cancer and healthy volunteers. The blood of the healthy volunteers will be used to evaluate the sensitivity and specificity and as negative control cells. To avoid contamination with skin cells, 2 mL blood will be discarded before the study samples will be taken.Briefly, the mononucleate cells will be separated from the blood over Ficoll- Paque for 20 min with 1800g at 4℃. The interface cells will be removed and washed, and the red blood cells(RBCs) will be removed using a lysis buffer followed by a repeated wash. The mononuclear cells will be counted and aliquot for RT-PCR and multiparameter flow cytometry on the basis of at least 2-3×106 cells for each methodology. The cell pellet will be resuspended in phosphate-buffered saline for multiparameter flow cytometry and in Trizol reagent for RT-PCR. Aim : Identification of CTCs may lead to better diagnosis and prognosis and could help to choose an adequate therapy.

Eligibility criteria: Inclusion Criteria:

1. Age:18-75
2. Karnofsky performance status \>60
3. Diagnosis of colorectal cancer based on histology or the current accepted radiological measures.
4. Classification tumor,nodes,metastasis-classification(TNM) stage: Ⅱ,Ⅲ,Ⅳ
5. Will receive cryosurgery and/or DC-CIK treatment
6. Life expectancy: Greater than 3 months
7. Patients' routine blood test, liver function and kidney function have no obvious abnormalities
8. Ability to understand the study protocol and a willingness to sign a written informed consent document

Exclusion Criteria:

1. Patients with other primary tumor except colorectal cancer
2. History of coagulation disorders or anemia

Primary outcomes:
measure: The number of Circulating Tumor Cells (CTCs)
timeFrame: Up to 6 months
Secondary outcomes:
Other outcomes:
Locations:
city: Guangzhou
country: China
facility: Central laboratory in Fuda cancer hospital
state: Guangdong
Study officials:
References:
citation: Wang HY, Ahn S, Kim S, Park S, Park S, Han H, Sohn JH, Kim S, Lee H. Detection of circulating tumor cells in patients with breast cancer using the quantitative RT-PCR assay for monitoring of therapy efficacy. Exp Mol Pathol. 2014 Dec;97(3):445-52. doi: 10.1016/j.yexmp.2014.09.003. Epub 2014 Sep 10.