scholarly journals Efficient Capture and Raman Analysis of Circulating Tumor Cells by Nano-Undulated AgNPs-rGO Composite SERS Substrates

Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5089
Author(s):  
Jong-Eun Park ◽  
Nuri Oh ◽  
Hyeono Nam ◽  
Ji-Ho Park ◽  
Sanha Kim ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Cancer Cells ◽  
Tumor Cells ◽  
Circulating Tumor Cells ◽  
Electric Fields ◽  
Indium Tin Oxide ◽  
Hot Spot ◽  
Silver Nanowire ◽  
Sers Substrate

The analysis of circulating tumor cells (CTCs) in the peripheral blood of cancer patients is critical in clinical research for further investigation of tumor progression and metastasis. In this study, we present a novel surface-enhanced Raman scattering (SERS) substrate for the efficient capture and characterization of cancer cells using silver nanoparticles-reduced graphene oxide (AgNPs-rGO) composites. A pulsed laser reduction of silver nanowire-graphene oxide (AgNW-GO) mixture films induces hot-spot formations among AgNPs and artificial biointerfaces consisting of rGOs. We also use in situ electric field-assisted fabrication methods to enhance the roughness of the SERS substrate. The AgNW-GO mixture films, well suited for the proposed process due to its inherent electrophoretic motion, is adjusted between indium tin oxide (ITO) transparent electrodes and the nano-undulated surface is generated by applying direct-current (DC) electric fields during the laser process. As a result, MCF7 breast cancer cells are efficiently captured on the AgNPs-rGO substrates, about four times higher than the AgNWs-GO films, and the captured living cells are successfully analyzed by SERS spectroscopy. Our newly designed bifunctional substrate can be applied as an effective system for the capture and characterization of CTCs.

scholarly journals The Mechanical Fingerprint of Circulating Tumor Cells (CTCs) in Breast Cancer Patients

Cancers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 1119
Author(s):  
Ivonne Nel ◽  
Erik W. Morawetz ◽  
Dimitrij Tschodu ◽  
Josef A. Käs ◽  
Bahriye Aktas
Keyword(s):  
Breast Cancer ◽  
Cancer Cells ◽  
Cancer Patients ◽  
Tumor Cells ◽  
Circulating Tumor Cells ◽  
Hematopoietic Cells ◽  
Surrogate Marker ◽  
Clinical Samples ◽  
Breast Cancer Patients ◽  
Shape Restoration

Circulating tumor cells (CTCs) are a potential predictive surrogate marker for disease monitoring. Due to the sparse knowledge about their phenotype and its changes during cancer progression and treatment response, CTC isolation remains challenging. Here we focused on the mechanical characterization of circulating non-hematopoietic cells from breast cancer patients to evaluate its utility for CTC detection. For proof of premise, we used healthy peripheral blood mononuclear cells (PBMCs), human MDA-MB 231 breast cancer cells and human HL-60 leukemia cells to create a CTC model system. For translational experiments CD45 negative cells—possible CTCs—were isolated from blood samples of patients with mamma carcinoma. Cells were mechanically characterized in the optical stretcher (OS). Active and passive cell mechanical data were related with physiological descriptors by a random forest (RF) classifier to identify cell type specific properties. Cancer cells were well distinguishable from PBMC in cell line tests. Analysis of clinical samples revealed that in PBMC the elliptic deformation was significantly increased compared to non-hematopoietic cells. Interestingly, non-hematopoietic cells showed significantly higher shape restoration. Based on Kelvin–Voigt modeling, the RF algorithm revealed that elliptic deformation and shape restoration were crucial parameters and that the OS discriminated non-hematopoietic cells from PBMC with an accuracy of 0.69, a sensitivity of 0.74, and specificity of 0.63. The CD45 negative cell population in the blood of breast cancer patients is mechanically distinguishable from healthy PBMC. Together with cell morphology, the mechanical fingerprint might be an appropriate tool for marker-free CTC detection.

scholarly journals Technical Insights into Highly Sensitive Isolation and Molecular Characterization of Fixed and Live Circulating Tumor Cells for Early Detection of Tumor Invasion

PLoS ONE ◽  
2017 ◽  
Vol 12 (1) ◽  
pp. e0169427 ◽  
Author(s):  
Sophie Laget ◽  
Lucile Broncy ◽  
Katia Hormigos ◽  
Dalia M. Dhingra ◽  
Fatima BenMohamed ◽  
...  
Keyword(s):  
Early Detection ◽  
Tumor Cells ◽  
Molecular Characterization ◽  
Circulating Tumor Cells ◽  
Tumor Invasion ◽  
Highly Sensitive

scholarly journals Aptamer-Conjugated Graphene Oxide Membranes for Highly Efficient Capture and Accurate Identification of Multiple Types of Circulating Tumor Cells

2015 ◽  
Vol 26 (2) ◽  
pp. 235-242 ◽  
Author(s):  
Bhanu Priya Viraka Nellore ◽  
Rajashekhar Kanchanapally ◽  
Avijit Pramanik ◽  
Sudarson Sekhar Sinha ◽  
Suhash Reddy Chavva ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Tumor Cells ◽  
Circulating Tumor Cells ◽  
Accurate Identification ◽  
Highly Efficient ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes

A Microfluidic Platform for On-Chip Analysis of Circulating Tumor Cells

2021 ◽  
Author(s):  
Jeff Darabi ◽  
Joseph Schober
Keyword(s):  
Cancer Cells ◽  
Tumor Cells ◽  
Circulating Tumor Cells ◽  
Whole Blood ◽  
Peripheral Blood ◽  
Automated Image Analysis ◽  
Rare Cancer ◽  
On Chip ◽  
Chip Analysis ◽  
Selection Of

Abstract Studies have shown that primary tumor sites begin shedding cancerous cells into peripheral blood at early stages of cancer, and the presence and frequency of circulating tumor cells (CTCs) in blood is directly proportional to disease progression. The challenge is that the concentration of the CTCs in peripheral blood may be extremely low. In the past few years, several microfluidic-based concepts have been investigated to isolate CTCs from whole blood. However, these devices are generally hampered by complex fabrication processes and very low volumetric throughputs, which may not be practical for rapid clinical applications. This paper presents a high-performance yet simple magnetophoretic microfluidic chip for the enrichment and on-chip analysis of rare CTCs from blood. Microscopic and flow cytometric assays developed for selection of cancer cell lines, selection of monoclonal antibodies, and optimization of bead coupling are discussed. Additionally, on-chip characterization of rare cancer cells using high resolution immunofluorescence microscopy and modeling results for prediction of CTC capture length are presented. The device has the ability to interface directly with on-chip pre and post processing modules such as mixing, incubation, and automated image analysis systems. These features will enable us to isolate rare cancer cells from whole blood and detect them on the chip with subcellular resolution.

Circulating Tumor Cells: Diagnostic and Therapeutic Applications

2018 ◽  
Vol 20 (1) ◽  
pp. 329-352 ◽  
Author(s):  
Eric Lin ◽  
Thong Cao ◽  
Sunitha Nagrath ◽  
Michael R. King
Keyword(s):  
Cancer Cells ◽  
Tumor Cells ◽  
Circulating Tumor Cells ◽  
Poor Prognosis ◽  
Experimental Therapeutics ◽  
Next Generation ◽  
Therapeutic Applications

Metastasis contributes to poor prognosis in many types of cancer and is the leading cause of cancer-related deaths. Tumor cells metastasize to distant sites via the circulatory and lymphatic systems. In this review, we discuss the potential of circulating tumor cells for diagnosis and describe the experimental therapeutics that aim to target these disseminating cancer cells. We discuss the advantages and limitations of such strategies and how they may lead to the development of the next generation of antimetastasis treatments.

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