双光子光刻制造的确定性横向位移微流控系统用于癌症治疗中的高效微型细胞净化

IF 3.3 4区 医学 Q3 ENGINEERING, BIOMEDICAL
Sharaj Hegde Sharavu, Sagar Bhagwat, Sebastian Kluck, Büsra Merve Kirpat Konak, Barbara Di Ventura, Pegah Pezeshkpour, Bastian E. Rapp
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引用次数: 0

摘要

无染色体微细胞源于细菌细胞的异常极性分裂事件,由于其独特的特性,已成为靶向癌症药物递送的有前途的纳米载体。其纯化过程中的一个主要挑战是如何有效地将这种球形微型细胞(< 1 μm)与其杆状亲本细胞(1 - 10 μm)分离开来。本研究探讨了确定性横向位移(DLD)微流控系统在微型细胞净化中的应用,利用双光子光刻(TPL)技术对为此目的优化的高分辨率设计进行快速成型。在层流条件下,我们研究了DLD的关键设计参数,包括对称和非对称柱间隙、出口宽度、双柱阵列、流阻优化设计。为了提高分离效率,我们研制了一种由螺旋惯性芯片和优化DLD芯片串联而成的两级微流控分离系统。利用高分辨率TPL技术制备了具有12螺旋的惯性芯片和具有2 μm下游后隙的非对称DLD芯片,分离效率达到94%。利用微流体分离不同形状和大小的细胞,实现了这种高效率,证明了先进的微流体系统在细胞分选中的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Two-photon lithography-fabricated deterministic lateral displacement microfluidic system for efficient minicell purification in cancer therapy

Chromosome-less minicells, derived from aberrant polar division events of bacterial cells, have emerged as promising nanocarriers for targeted cancer drug delivery due to their unique characteristics. A major challenge in their purification process lies in effectively isolating such spherical minicells (< 1 μm) from their rod-shaped parental cells (1–10 μm). This study investigates the use of Deterministic Lateral Displacement (DLD) microfluidic systems for minicell purification, leveraging Two-Photon Lithography (TPL) for the rapid prototyping of high-resolution designs optimized for this purpose. Under laminar flow conditions, we investigated key DLD design parameters including symmetric and asymmetric post gaps, outlet widths, dual post arrays, fluidic-resistance-optimized design. To enhance separation efficiency, we developed a two-stage microfluidic separation system combining a spiral inertial chip and an optimized DLD chip in series. Utilizing high-resolution TPL for chip fabrication of an inertial chip with 12 spirals and an asymmetric DLD chip with a 2 μm downstream post gap, we achieved a separation efficiency of 94%. This high efficiency achieved using microfluidics for the separation of cells differing in both shape and size, demonstrates the potential of advanced microfluidic systems in cell sorting.

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来源期刊
Biomedical Microdevices
Biomedical Microdevices 工程技术-工程:生物医学
CiteScore
6.90
自引率
3.60%
发文量
32
审稿时长
6 months
期刊介绍: Biomedical Microdevices: BioMEMS and Biomedical Nanotechnology is an interdisciplinary periodical devoted to all aspects of research in the medical diagnostic and therapeutic applications of Micro-Electro-Mechanical Systems (BioMEMS) and nanotechnology for medicine and biology. General subjects of interest include the design, characterization, testing, modeling and clinical validation of microfabricated systems, and their integration on-chip and in larger functional units. The specific interests of the Journal include systems for neural stimulation and recording, bioseparation technologies such as nanofilters and electrophoretic equipment, miniaturized analytic and DNA identification systems, biosensors, and micro/nanotechnologies for cell and tissue research, tissue engineering, cell transplantation, and the controlled release of drugs and biological molecules. Contributions reporting on fundamental and applied investigations of the material science, biochemistry, and physics of biomedical microdevices and nanotechnology are encouraged. A non-exhaustive list of fields of interest includes: nanoparticle synthesis, characterization, and validation of therapeutic or imaging efficacy in animal models; biocompatibility; biochemical modification of microfabricated devices, with reference to non-specific protein adsorption, and the active immobilization and patterning of proteins on micro/nanofabricated surfaces; the dynamics of fluids in micro-and-nano-fabricated channels; the electromechanical and structural response of micro/nanofabricated systems; the interactions of microdevices with cells and tissues, including biocompatibility and biodegradation studies; variations in the characteristics of the systems as a function of the micro/nanofabrication parameters.
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