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Li M, Jiang L, Li X, Li T, Yi P, Li X, Zhang L, Li L, Wang Z, Zhang X, Wang A, Li J. Wide-Size Range and High Robustness Self-Assembly Micropillars for Capturing Microspheres. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38684027 DOI: 10.1021/acsami.4c02749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Capillary force driven self-assembly micropillars (CFSA-MP) holds immense promise for the manipulation and capture of cells/tiny objects, which has great demands of wide size range and high robustness. Here, we propose a novel method to fabricate size-adjustable and highly robust CFSA-MP that can achieve wide size range and high stability to capture microspheres. First, we fabricate a microholes template with an adjustable aspect ratio using the spatial-temporal shaping femtosecond laser double-pulse Bessel beam-assisted chemical etching technique, and then the micropillars with adjustable aspect ratio are demolded by polydimethylsiloxane (PDMS). We fully demonstrated the advantages of the Bessel optical field by using the spatial-temporal shaping femtosecond laser double-pulse Bessel beams to broaden the height range of the micropillars, which in turn expands the size range of the captured microspheres, and finally achieving a wide range of capturing microspheres with a diameter of 5-410 μm. Based on the inverted mold technology, the PDMS micropillars have ultrahigh mechanical robustness, which greatly improves the durability. CFSA-MP has the ability to capture tiny objects with wide range and high stability, which indicates great potential applications in the fields of chemistry, biomedicine, and microfluidics.
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Affiliation(s)
- Min Li
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Lan Jiang
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
- Yangtze Delta Region Academy of Beijing Institute of Technology, Jiaxing 314019, China
- Institute of Technology Chongqing Innovation Center, Chongqing 401120, China
| | - Xiaowei Li
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
- Yangtze Delta Region Academy of Beijing Institute of Technology, Jiaxing 314019, China
| | - Taoyong Li
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Peng Yi
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Xibiao Li
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Leyi Zhang
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Luqi Li
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Zhi Wang
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Xiangyu Zhang
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Andong Wang
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Jiafang Li
- School of Physics, Beijing Institute of Technology, Beijing 100081, China
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Singh S, Sahani H. Current Advancement and Future Prospects: Biomedical Nanoengineering. Curr Radiopharm 2024; 17:120-137. [PMID: 38058099 DOI: 10.2174/0118744710274376231123063135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 10/19/2023] [Accepted: 10/27/2023] [Indexed: 12/08/2023]
Abstract
Recent advancements in biomedicine have seen a significant reliance on nanoengineering, as traditional methods often fall short in harnessing the unique attributes of biomaterials. Nanoengineering has emerged as a valuable approach to enhance and enrich the performance and functionalities of biomaterials, driving research and development in the field. This review emphasizes the most prevalent biomaterials used in biomedicine, including polymers, nanocomposites, and metallic materials, and explores the pivotal role of nanoengineering in developing biomedical treatments and processes. Particularly, the review highlights research focused on gaining an in-depth understanding of material properties and effectively enhancing material performance through molecular dynamics simulations, all from a nanoengineering perspective.
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Affiliation(s)
- Sonia Singh
- Institute of Pharmaceutical Research, GLA University, 17 km Stone, NH-2, Mathura-Delhi Road Mathura, Chaumuhan, Uttar Pradesh, 281406, India
| | - Hrishika Sahani
- Lifecell International Pvt. Ltd., NSP Office, Pearls Business Park, 8th Floor Office No-804, Netaji Subhash Palace Delhi, 110034, India
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Li J, Huang X, Yang Y, Zhou J, Yao K, Li J, Zhou Y, Li M, Wong TH, Yu X. Wearable and battery-free wound dressing system for wireless and early sepsis diagnosis. Bioeng Transl Med 2023; 8:e10445. [PMID: 38023725 PMCID: PMC10658553 DOI: 10.1002/btm2.10445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/18/2022] [Accepted: 10/30/2022] [Indexed: 02/04/2023] Open
Abstract
Sepsis is a severe organ dysfunction typically caused by wound infection which leads to septic shock, organ failure or even death if no early diagnosis and property medical treatment were taken. Herein, we report a soft, wearable and battery-free wound dressing system (WDS) for wireless and real-time monitoring of wound condition and sepsis-related biomarker (procalcitonin [PCT]) in wound exudate for early sepsis detection. The battery-free WDS powered by near-field communication enables wireless data transmission, signal processing and power supply, which allows portable intelligent wound caring. The exudate collection associates with soft silicone based microfluidic technologies (exudate collection time within 15 s), that can filtrate contamination at the cell level and enable a superior filtration rate up to 95% with adopting microsphere structures. The battery-free WDS also includes state-of-the-art biosensors, which can accurate detect the pH value, wound temperature, and PCT level and thus for sepsis diagnosis. In vivo studies of SD rats prove the capability of the WDS for continuously monitoring wound condition and PCT concentration in the exudate. As a result, the reported fully integrated WDS provides a potential solution for further developing wearable, multifunctional and on-site disease diagnosis.
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Affiliation(s)
- Jiyu Li
- Department of Biomedical EngineeringCity University of Hong KongKowloon TongHong Kong
- Hong Kong Center for Cerebra‐Cardiovascular Health EngineeringHong Kong Science ParkNew TerritoriesHong Kong
| | - Xingcan Huang
- Department of Biomedical EngineeringCity University of Hong KongKowloon TongHong Kong
| | - Yawen Yang
- Department of Biomedical EngineeringCity University of Hong KongKowloon TongHong Kong
| | - Jingkun Zhou
- Department of Biomedical EngineeringCity University of Hong KongKowloon TongHong Kong
- Hong Kong Center for Cerebra‐Cardiovascular Health EngineeringHong Kong Science ParkNew TerritoriesHong Kong
| | - Kuanming Yao
- Department of Biomedical EngineeringCity University of Hong KongKowloon TongHong Kong
| | - Jian Li
- Department of Biomedical EngineeringCity University of Hong KongKowloon TongHong Kong
- Hong Kong Center for Cerebra‐Cardiovascular Health EngineeringHong Kong Science ParkNew TerritoriesHong Kong
| | - Yingying Zhou
- Department of Biomedical EngineeringHong Kong Polytechnic UniversityKowloonHong Kong
| | - Meixi Li
- Leshan Hospital of Traditional Chinese MedicineLeshanChina
| | - Tsz Hung Wong
- Department of Biomedical EngineeringCity University of Hong KongKowloon TongHong Kong
| | - Xinge Yu
- Department of Biomedical EngineeringCity University of Hong KongKowloon TongHong Kong
- Hong Kong Center for Cerebra‐Cardiovascular Health EngineeringHong Kong Science ParkNew TerritoriesHong Kong
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Selective single-bacteria extraction based on capture and release of microemulsion droplets. Sci Rep 2022; 12:15461. [PMID: 36104374 PMCID: PMC9474873 DOI: 10.1038/s41598-022-19844-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Accepted: 09/05/2022] [Indexed: 12/02/2022] Open
Abstract
Human host-associated microbial communities in body sites can reflect health status based on the population distribution and specific microbial properties in the heterogeneous community. Bacteria identification at the single-cell level provides a reliable biomarker and pathological information for clinical diagnosis. Nevertheless, biosamples obtained from some body sites cannot offer sufficient sample volume and number of target cells as required by most of the existing single-cell isolation methods such as flow cytometry. Herein we report a novel integrated microfluidic system, which consists of a microemulsion module for single-bacteria encapsulation and a sequential microdroplet capture and release module for selectively extracting only the single-bacteria encapsulated in microdroplets. We optimize the system for a success rate of the single-cell extraction to be > 38%. We further verify applicability of the system with prepared cell mixtures (Methylorubrum extorquens AM1 and Methylomicrobium album BG8) and biosamples collected from human skin, to quantify the population distribution of multiple key species in a heterogeneous microbial community. Results indicate perfect viability of the single-cell extracts and compatibility with downstream analyses such as PCR. Together, this research demonstrates that the reported single-bacteria extraction system can be applied in microbiome and pathology research and clinical diagnosis as a clinical or point-of-care device.
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Szittner Z, Péter B, Kurunczi S, Székács I, Horváth R. Functional blood cell analysis by label-free biosensors and single-cell technologies. Adv Colloid Interface Sci 2022; 308:102727. [DOI: 10.1016/j.cis.2022.102727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 05/25/2022] [Accepted: 06/27/2022] [Indexed: 11/01/2022]
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Tian Y, Xu C, Feng J, Huangfu Y, Wang K, Zhang ZL. Personalized gel-droplet monocyte vaccines for cancer immunotherapy. LAB ON A CHIP 2021; 21:4414-4426. [PMID: 34676383 DOI: 10.1039/d1lc00646k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Among the numerous forms of cancer immunotherapy, cancer vaccines have attracted increasing attention because of their ability to elicit sustained antitumor immune responses and durable tumor regression. Here, a personalized gel-droplet monocyte vaccine (GEMA) derived from host blood was reported. A streamlined microfluidic vaccine production platform was designed to combine the separation of monocytes from host blood and the encapsulation of monocytes in an alginate gel droplet, which simplified the handling of the blood product and permitted the rapid preparation of vaccines. In addition, the application of alginate gel encapsulation not only improved the efficiency of antigen uptake by monocytes, but it also promoted the production of antigen-specific CD8+ T cells in the spleen, resulting in an intense cytotoxic T lymphocyte (CTL) response. Moreover, depending on the disease profile of a specific patient, different adjuvant- and antigen-loaded monocytes could be simultaneously encapsulated in gel droplets to prepare a cocktail vaccine based on patient needs. In this study, anti-PD-1 antibodies were encapsulated in gel droplets as a model adjuvant to obtain a cocktail vaccine, and this demonstrated enhanced antitumor efficacy in a 4T1 breast tumor model. In summary, this study provided a unique vaccine production strategy and an efficient combination therapy approach, holding great promise for the development of personalized cancer vaccines.
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Affiliation(s)
- Yishen Tian
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China.
| | - Chunmiao Xu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China.
| | - Jiao Feng
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China.
| | - Yueyue Huangfu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China.
| | - Kai Wang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China.
| | - Zhi-Ling Zhang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China.
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Li P, Yu H, Wang X, Wen Y, Zhao W, Luo H, Ge Z, Liu L. Self-assembled microcage fabrication for manipulating and selectively capturing microparticles and cells. OPTICS EXPRESS 2021; 29:11144-11157. [PMID: 33820233 DOI: 10.1364/oe.420033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 03/18/2021] [Indexed: 06/12/2023]
Abstract
Single-cell-scale selective manipulation and targeted capture play a vital role in cell behavior analysis. However, selective microcapture has primarily been performed in specific circumstances to maintain the trapping state, making the subsequent in situ characterization and analysis of specific particles or cells difficult and imprecise. Herein, we propose a novel method that combines femtosecond laser two-photon polymerization (TPP) micromachining technology with the operation of optical tweezers (OTs) to achieve selective and targeted capture of single particles and cells. Diverse ordered microcages with different shapes and dimensions were self-assembled by micropillars fabricated via TPP. The micropillars with high aspect ratios were processed by single exposure, and the parameters of the micropillar arrays were investigated to optimize the capillary-force-driven self-assembly process of the anisotropic microcages. Finally, single microparticles and cells were selectively transported to the desired microcages by manipulating the flexibly of the OTs in a few minutes. The captured microparticles and cells were kept trapped without additional forces.
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Liu L, Hu D, Lam RHW. Microfluidic Viscometer Using a Suspending Micromembrane for Measurement of Biosamples. MICROMACHINES 2020; 11:mi11100934. [PMID: 33066536 PMCID: PMC7602240 DOI: 10.3390/mi11100934] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 10/13/2020] [Accepted: 10/13/2020] [Indexed: 01/26/2023]
Abstract
The viscosity of biofluids such as blood and saliva can reflect an individual’s health conditions, and viscosity measurements are therefore considered in health monitoring and disease diagnosis. However, conventional viscometers can only handle a larger liquid volume beyond the quantity that can be extracted from a person. Though very effective, micro-sensors based on electrokinetic, ultrasonic, or other principles often have strict requirements for the supporting equipment and complicated procedures and signal processing. Sample contamination is always an important issue. In this paper, we report a microfluidic viscometer requiring a small volume of biosamples (<50 µL) and straightforward operation procedures. It is fabricated with low-cost and biocompatible polymeric materials as one-time-use devices, such that contamination is no longer the concern. It contains a suspending micromembrane located along a microchannel. Under a steady driving pressure, the membrane displacement is a function of viscosity of the liquid sample being tested. We derived a simple analytical relation and perform a simulation for converting the membrane displacement to the sample viscosity. We conducted experiments with liquids (water and mineral oil) with defined properties to verify such a relation. We further applied the micro-viscometer to measure bovine blood samples with different hematocrit levels. It can be concluded that the microfluidic viscometer has a high compatibility with a broad range of biomedical applications.
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Affiliation(s)
- Lelin Liu
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, China; (L.L.); (D.H.)
| | - Dinglong Hu
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, China; (L.L.); (D.H.)
- Institute of Biointelligence Technology, BGI-Shenzhen, Shenzhen 518083, China
| | - Raymond H. W. Lam
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, China; (L.L.); (D.H.)
- City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China
- Centre for Biosystems, Neuroscience, and Nanotechnology, City University of Hong Kong, Hong Kong, China
- Centre for Robotics and Automation, City University of Hong Kong, Hong Kong, China
- Correspondence: ; Tel.: +852-3442-8577
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