The Detection of Circulating Tumor Cells (CTCs) in Patients With Renal Cancer Undergoing Cryosurgery Combined With DC-CIK Treatment


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 renal 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 renal 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.

Study Type

  • Study Type: Observational
  • Study Design
    • Time Perspective: Prospective
  • Study Primary Completion Date: December 2015

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 renal 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.


  • Other: Flow cytometry (FCM)
    • Use FCM to test PBMCs/CTCs from volunteers/patients.
  • Other: RT-PCR
    • Use RT-PCR to test PBMCs/CTCs from volunteers/patients.

Arms, Groups and Cohorts

  • Control
    • Use Flow cytometry (FCM) and RT-PCR to test peripheral blood mononuclear cells(PBMCs) from healthy volunteer.
  • Cryosurgery group
    • Use Flow cytometry (FCM) and RT-PCR to test CTCs from patients who received cryosurgery only, 1 day before and 2 days after the cryosurgery.
  • DC-CIK treatment group
    • Use Flow cytometry (FCM) and RT-PCR to test CTCs from patients who received DC-CIK treatment only, 1 day before and 2 days after the DC-CIK treatment.
  • Cryosurgery with DC-CIK treatment group
    • Use Flow cytometry (FCM) and RT-PCR to test CTCs from patients received cryosurgery and DC-CIK treatment both, 1 day before and 2 days after the cryosurgery with DC-CIK treatment.

Clinical Trial Outcome Measures

Primary Measures

  • The number of Circulating Tumor Cells (CTCs)
    • Time Frame: Up to 6 months

Participating in This Clinical Trial

Inclusion Criteria

1. Age:18-75

2. Karnofsky performance status >60

3. Diagnosis of renal 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 renal cancer

2. History of coagulation disorders or anemia

Gender Eligibility: All

Minimum Age: 18 Years

Maximum Age: 75 Years

Are Healthy Volunteers Accepted: Accepts Healthy Volunteers

Investigator Details

  • Lead Sponsor
    • Fuda Cancer Hospital, Guangzhou
  • Provider of Information About this Clinical Study
    • Sponsor


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.

Clinical trials entries are delivered from the US National Institutes of Health and are not reviewed separately by this site. Please see the identifier information above for retrieving further details from the government database.

At, we keep tabs on over 200,000 clinical trials in the US and abroad, using medical data supplied directly by the US National Institutes of Health. Please see the About and Contact page for details.