scholarly journals Circulating Tumor Cells in Gastrointestinal Malignancies: Current Techniques and Clinical Implications

2010 ◽  
Vol 2010 ◽  
pp. 1-9 ◽  
Author(s):  
Georg Lurje ◽  
Marc Schiesser ◽  
Andreas Claudius Hoffmann ◽  
Paul Magnus Schneider
Keyword(s):  
Colorectal Cancer ◽  
Clinical Outcome ◽  
Disease Progression ◽  
Cancer Patients ◽  
Tumor Cells ◽  
Circulating Tumor Cells ◽  
Response To Therapy ◽  
Clinical Implications ◽  
Gastrointestinal Malignancies ◽  
Progression Of Disease

Since their introduction more than 50 years by Engell, circulating tumor cells (CTCs) have been evaluated in cancer patients and their detection has been correlated with clinical outcome, in esophageal, gastric, and colorectal cancer. With the availability of refined technologies, the identification of CTCs from peripheral blood is emerging as a useful tool for the detection of malignancy, monitoring disease progression, and measuring response to therapy. However, increasing evidence suggests a variety of factors to be responsible for disease progression. The analysis of a single CTC marker is therefore unlikely to accurately predict progression of disease with sufficient resolution and reproducibility. Here we discuss the current concept of CTCs, summarize the available techniques for their detection and characterization, and aim to provide a comprehensive update on the clinical implications of CTCs in gastrointestinal (GI) malignancies.

scholarly journals Gene Expression Signatures in Circulating Tumor Cells Correlate with Response to Therapy in Metastatic Breast Cancer

2017 ◽  
Vol 63 (10) ◽  
pp. 1585-1593 ◽  
Author(s):  
Maren Bredemeier ◽  
Philippos Edimiris ◽  
Pawel Mach ◽  
Mikael Kubista ◽  
Robert Sjöback ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Gene Expression ◽  
Metastatic Breast Cancer ◽  
Disease Progression ◽  
Tumor Cells ◽  
Circulating Tumor Cells ◽  
Metastatic Breast ◽  
Response To Therapy ◽  
Clinical Staging ◽  
Significant Differential Expression

Abstract BACKGROUND Circulating tumor cells (CTCs) are thought to be an ideal surrogate marker to monitor disease progression in metastatic breast cancer (MBC). We investigated the prediction of treatment response in CTCs of MBC patients on the basis of the expression of 46 genes. METHODS From 45 MBC patients and 20 healthy donors (HD), 2 × 5 mL of blood was collected at the time of disease progression (TP0) and at 2 consecutive clinical staging time points (TP1 and TP2) to proceed with the AdnaTest EMT-2/StemCellSelectTM (QIAGEN). Patients were grouped into (a) responder (R) and non-responder (NR) at TP1 and (b) overall responder (OR) and overall non-responder (ONR) at TP2. A 46-gene PCR assay was used for preamplification and high-throughput gene expression profiling. Data were analyzed by use of GenEx (MultiD) and SAS. RESULTS The CTC positivity was defined by the four-gene signature (EPCAM, KRT19, MUC1, ERBB2 positivity). Fourteen genes were identified as significantly differentially expressed between CTC+ and CTC− patients (KRT19, FLT1, EGFR, EPCAM, GZMM, PGR, CD24, KIT, PLAU, ALDH1A1, CTSD, MKI67, TWIST1, and ERBB2). KRT19 was highly expressed in CTC+ patients and ADAM17 in the NR at TP1. A significant differential expression of 4 genes (KRT19, EPCAM, CDH1, and SCGB2A2) was observed between OR and ONR when stratifying the samples into CTC+ or CTC−. CONCLUSIONS ADAM17 could be a key marker in distinguishing R from NR, and KRT19 was powerful in identifying CTCs.

Sign in / Sign up

Export Citation Format

Share Document