scholarly journals Frequent Quantitation of Circulating Tumor Cells Predictive of Real-Time Therapy Response

2022 ◽  
Author(s):  
Christine M Lim ◽  
Junli Shi ◽  
Jess Vo ◽  
Wai Min Phyo ◽  
Min Hu ◽  
...  
Keyword(s):  
Treatment Response ◽  
Real Time ◽  
Tumor Cells ◽  
Circulating Tumor Cells ◽  
Tumor Staging ◽  
Therapy Response ◽  
Continuous Treatment ◽  
Image Analysis System ◽  
Breast Cancers ◽  
Cancer Management

Precision medicine is playing an increasingly important role in cancer management and treatment. Specifically in the field of oncology, circulating tumor cells (CTCs) hold significant promise in enabling non-invasive prognostication and near real-time monitoring to individualize treatments. In this study, we present strong associations between CTC subtype counts with treatment response and tumor staging in lung, nasopharyngeal and breast cancers. Longitudinal analysis of CTC count changes over short-time windows further reveals the ability to predict treatment response close to real-time. Our findings demonstrate the suitability of CTCs as a definitive blood-based metric for continuous treatment monitoring. Robust processing of high-throughput image data, explainable classification of CTC subtypes and accurate quantification were achieved using an in-house image analysis system CTC-Quant, which showed excellent agreement with expert opinion upon extensive validation.

Circulating Tumor Cells in HER-2 Positive Metastatic Breast Cancer Patients Treated with Trastuzumab and Chemotherapy

2009 ◽  
Vol 24 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Raquel A. Nunes ◽  
Xiaochun Li ◽  
Soonmo Peter Kang ◽  
Harold Burstein ◽  
Lisa Roberts ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Metastatic Breast Cancer ◽  
Treatment Response ◽  
Cancer Patients ◽  
Tumor Cells ◽  
Circulating Tumor Cells ◽  
Peripheral Blood ◽  
Metastatic Breast ◽  
Breast Cancer Patients ◽  
Her 2

The detection of circulating tumor cells (CTCs) in peripheral blood may have important prognostic and predictive implications in breast cancer treatment. A limitation in this field has been the lack of a validated method of accurately measuring CTCs. While sensitivity has improved using RT-PCR, specificity remains a major challenge. The goal of this paper is to present a sensitive and specific methodology of detecting CTCs in women with HER-2-positive metastatic breast cancer, and to examine its role as a marker that tracks disease response during treatment with trastuzumab-containing regimens. The study included patients with HER-2-positive metastatic breast cancer enrolled on two different clinical protocols using a trastuzumab-containing regimen. Serial CTCs were measured at planned time points and clinical correlations were made. Immunomagnetic selection of circulating epithelial cells was used to address the specificity of tumor cell detection using cytokeratin 19 (CK19). In addition, the extracellular domain of the HER-2 protein (HER-2/ECD) was measured to determine if CTCs detected by CK19 accurately reflect tumor burden. The presence of CTCs at first restaging was associated with disease progression. We observed an association between CK19 and HER-2/ECD. The association of HER-2/ECD with clinical response followed a similar pattern to that seen with CK19. Finally, the absence of HER-2/ECD at best overall response and a change of HER-2/ECD from positive at baseline to negative at best overall response was associated with favorable treatment response. Our study supports the prognostic and predictive role of the detection of CTCs in treatment of HER-2-positive metastatic breast cancer patients. The association between CK19 and markers of disease burden is in line with the concept that CTCs may be a reliable measure of tumor cells in the peripheral blood of patients with metastatic breast cancer. The association of CTCs at first restaging with treatment failure indicates that CTCs may have a role as surrogate markers to monitor treatment response.

scholarly journals Dysmetabolic Circulating Tumor Cells Are Prognostic in Metastatic Breast Cancer

Cancers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1005 ◽  
Author(s):  
Giulia Brisotto ◽  
Eva Biscontin ◽  
Elisabetta Rossi ◽  
Michela Bulfoni ◽  
Aigars Piruska ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Metastatic Breast Cancer ◽  
Tumor Cells ◽  
Circulating Tumor Cells ◽  
Metastatic Breast ◽  
Therapy Response ◽  
Label Free ◽  
Breast Cancer Patients ◽  
Combining Data ◽  
Definition Of

Circulating tumor cells (CTCs) belong to a heterogeneous pool of rare cells, and a unequivocal phenotypic definition of CTC is lacking. Here, we present a definition of metabolically-altered CTC (MBA-CTCs) as CD45-negative cells with an increased extracellular acidification rate, detected with a single-cell droplet microfluidic technique. We tested the prognostic value of MBA-CTCs in 31 metastatic breast cancer patients before starting a new systemic therapy (T0) and 3–4 weeks after (T1), comparing results with a parallel FDA-approved CellSearch (CS) approach. An increased level of MBA-CTCs was associated with: i) a shorter median PFS pre-therapy (123 days vs. 306; p < 0.0001) and during therapy (139 vs. 266 days; p = 0.0009); ii) a worse OS pre-therapy (p = 0.0003, 82% survival vs. 20%) and during therapy (p = 0.0301, 67% survival vs. 38%); iii) good agreement with therapy response (kappa = 0.685). The trend of MBA-CTCs over time (combining data at T0 and T1) added information with respect to separate evaluation of T0 and T1. The combined results of the two assays (MBA and CS) increased stratification accuracy, while correlation between MBA and CS was not significant, suggesting that the two assays are detecting different CTC subsets. In conclusion, this study suggests that MBA allows detection of both EpCAM-negative and EpCAM-positive, viable and label-free CTCs, which provide clinical information apparently equivalent and complementary to CS. A further validation of proposed method and cut-offs is needed in a larger, separate study.

1327 Real-time risk evaluation of metastasis using circulating tumor cells

2009 ◽  
Vol 7 (2) ◽  
pp. 147 ◽  
Author(s):  
A. de Albuquerque ◽  
S. Kaul ◽  
N. Fersis ◽  
D. Ernst ◽  
A. Teubner ◽  
...  
Keyword(s):  
Real Time ◽  
Tumor Cells ◽  
Circulating Tumor Cells ◽  
Risk Evaluation

In vitro culturing of circulating tumor cells in lung cancer management

Lung Cancer ◽  
2012 ◽  
Vol 77 ◽  
pp. S23
Author(s):  
Katarína Kološtová ◽  
Marián Liberko ◽  
Eva Hroncová ◽  
Robert M. Hoffman ◽  
Vladimír Bobek
Keyword(s):  
Lung Cancer ◽  
Tumor Cells ◽  
Circulating Tumor Cells ◽  
Cancer Management
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