We present a novel method for conducting true single-cell encapsulation at very high efficiency for the manipulation of precious samples. Our unique strategy is based on the sequential capture and original encapsulation of single-cells into a series of hydrodynamic traps. We identified two distinct modes of encapsulation and we established their associated design rules. We improved the trapping scheme to reach a near perfect capture efficiency and make it compatible with the encapsulation process. Finally, we developed the complete device operation that permits highly efficient single-cell encapsulation and droplet retrieval. This platform provides the foundation to a fully integrated multiparameter platform that will impact the analysis of tissues at single-cell resolution.
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http://dx.doi.org/10.1039/c7lc00283a | DOI Listing |
J Mater Chem B
January 2025
State Key Laboratory of Oral Disease & National Center for Stomatology & National Clinical Center for Oral Diseases & Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.
Bone defects are a prevalent issue resulting from various factors, such as trauma, degenerative diseases, congenital disabilities, and the surgical removal of tumors. Current methods for bone regeneration have limitations. In this context, the fusion of tissue engineering and microfluidics has emerged as a promising strategy in the field of bone regeneration.
View Article and Find Full Text PDFAdv Sci (Weinh)
January 2025
School of Integrated Circuits, Peking University, Beijing, 100871, China.
The efficient isolation and molecular analysis of circulating tumor cells (CTCs) from whole blood at single-cell level are crucial for understanding tumor metastasis and developing personalized treatments. The viability of isolated cells is the key prerequisite for the downstream molecular analysis, especially for RNA sequencing. This study develops a laser-induced forward transfer -assisted microfiltration system (LIFT-AMFS) for high-viability CTC enrichment and retrieval from whole blood.
View Article and Find Full Text PDFAnal Chim Acta
February 2025
Robotics and Microsystems Center, School of Mechanical and Electrical Engineering, Soochow University, Suzhou, 215000, China. Electronic address:
Background: Excessive alcohol consumption poses a significant threat to human health, leading to cellular dehydration, degeneration, and necrosis. Alcohol-induced cellular damage is closely linked to alterations in cellular mechanical properties. However, characterizing these changes following alcohol-related injury remains challenging.
View Article and Find Full Text PDFNano Lett
January 2025
Faculty of Hepato-Pancreato-Biliary Surgery, The First Medical Center of Chinese People's Liberation Army (PLA) General Hospital, Beijing 100853, P. R. China.
Portal vein tumor thrombus (PVTT) is a poor prognostic factor for hepatocellular carcinoma (HCC) patients, highlighting the need for an oral drug delivery system that combines convenience, simplicity, biosafety, and improved patient compliance. Leveraging the unique anatomy of the portal vein and insights from single-cell RNA sequencing of the PVTT tumor microenvironment, we developed oral pellets using CaCO@PDA nanoparticles (NPs) encapsulating both doxorubicin hydrochloride and low molecular weight heparin. These NPs target the tumor thrombus microenvironment, aiming to break down the thrombus barrier and turn the challenge of portal vein blockage into an advantage by enhancing drug delivery efficiency through oral administration.
View Article and Find Full Text PDFAppl Environ Microbiol
January 2025
McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas, USA.
Electroactive organisms contribute to metal cycling, pollutant removal, and other redox-driven environmental processes via extracellular electron transfer (EET). Unfortunately, developing genotype-phenotype relationships for electroactive organisms is challenging because EET is necessarily removed from the cell of origin. Microdroplet emulsions, which encapsulate individual cells in aqueous droplets, have been used to study a variety of extracellular phenotypes but have not been applied to investigate EET.
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