A Virtual-Droplet System for Sensing MMP9 Activity of Single Suspended and Adhered Cancer Cells

Publication date: Available online 21 January 2020Source: Sensors and Actuators B: ChemicalAuthor(s): Ying Li, Pengchao Zhang, Tao Li, Rui Hu, Jiang Zhu, Ting He, Yunhuang Yang, Maili LiuAbstractCancer cells’ MMP9 activity plays vital roles in tumor development. Tumor cells are in an adhesion profile during cell-cell and cell-matrix interaction. However, it is challenging for current platforms (e.g., typical droplet systems) to measure MMP9 secreted by single cells in an adhesion profile and retrieve the cells of interest for downstream analysis. Herein, we report a single-cell protease sensor (SCPS) based on ‘virtual droplet’ that can fulfill the above two requirements. SCPS can form 648 virtual droplets within one minute as a one-cell-per-droplet profile, which offers an isolated space with a substrate to support cells’ adhesion and enables MMP9 measurement for hundreds of single adhered cells within two hours. In addition to high cellular heterogeneity of cancer cells in MMP9 production, we also found that adhered MDA-MB-231 cells produced relatively more MMP9 than that done by suspended cells. Furthermore, the cells producing high MMP9 and low MMP9 were retrieved and mRNA-sequence was performed on them. The results demonstrated that some KEGG pathways associated with cell migration and invasion were enriched and a few related genes (e.g., FYN, MAPK3, RAF) were upregulated in high-MMP9 cells. This SCPS system provides a promising strategy for measur...
Source: Sensors and Actuators B: Chemical - Category: Chemistry Source Type: research

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Publication date: Available online 26 February 2020Source: Meta GeneAuthor(s): Salma Begum Bhyan, YongKiat Wee, Mingyu Luo, Yining Liu, Min Zhao
Source: Meta Gene - Category: Genetics & Stem Cells Source Type: research
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Source: Molecular Genetics & Genomic Medicine - Category: Genetics & Stem Cells Authors: Tags: ORIGINAL ARTICLE Source Type: research
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Source: Molecular Genetics & Genomic Medicine - Category: Genetics & Stem Cells Authors: Tags: CLINICAL REPORT Source Type: research
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Source: Molecular Genetics & Genomic Medicine - Category: Genetics & Stem Cells Authors: Tags: REVIEW ARTICLE Source Type: research
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Source: Molecular Genetics & Genomic Medicine - Category: Genetics & Stem Cells Authors: Tags: ORIGINAL ARTICLE Source Type: research
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Source: Urology Case Reports - Category: Urology & Nephrology Source Type: research
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Source: Andrology - Category: Urology & Nephrology Authors: Tags: ORIGINAL ARTICLE Source Type: research
Discussion and conclusionsA schema showing the time from initiation of therapy at which specific antineoplastic agents can cause significant levels of genetic damage in conceptuses and live offspring was developed. The estimates and methods for computing the level of such risk from an individual patient's treatment regimen will enable patients and counselors to make informed decisions on the use of spermatozoa or continuation of a pregnancy.
Source: Andrology - Category: Urology & Nephrology Authors: Tags: REVIEW ARTICLE Source Type: research
Publication date: Available online 26 February 2020Source: European UrologyAuthor(s): Wei Liu, Xiaoping Liu, Sheng Li
Source: European Urology - Category: Urology & Nephrology Source Type: research
INTRODUCTION: Long-term childhood cancer survivors (CCS) are at risk for physical and psychosocial late effects. Previous research has attested to increased rates of suicidal ideation (SI) in CCS, an especially dangerous indicator of distress. However, lit...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Risk Factor Prevalence, Injury Occurrence Source Type: news
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