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Zhang Z, Dai C, Huang J, Wang X, Liu J, Ru C, Pu H, Xie S, Zhang J, Moskovtsev S, Librach C, Jarvi K, Sun Y. Robotic Immobilization of Motile Sperm for Clinical Intracytoplasmic Sperm Injection. IEEE Trans Biomed Eng 2018; 66:444-452. [PMID: 29993453 DOI: 10.1109/tbme.2018.2848972] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE In clinical intracytoplasmic sperm injection (ICSI), a motile sperm must be immobilized before insertion into an oocyte. This paper aims to develop a robotic system for automated tracking, orientation control, and immobilization of motile sperms for clinical ICSI applications. METHODS We adapt the probabilistic data association filter by adding sperm head orientation into state variables for robustly tracking the sperm head and estimating sperm tail positions under interfering conditions. The robotic system also utilizes a motorized rotational microscopy stage and a new visual servo control strategy that predicts and compensates for sperm movements to actively adjust sperm orientation for immobilizing a sperm swimming in any direction. RESULTS The system robustly tracked sperm head with a tracking success rate of 96.0% and estimated sperm tail position with an accuracy of 1.08 μm under clinical conditions where the occlusion of the target sperm and interference from other sperms occur. Experimental results from robotic immobilization of 400 sperms confirmed that the system achieved a consistent immobilization success rate of 94.5%, independent of sperm velocity or swimming direction. CONCLUSION Our adapted tracking algorithm effectively distinguishes the target sperm from interfering sperms. Predicting and compensating for sperm movements significantly reduce the positioning error during sperm orientation control. These features make the robotic system suitable for automated sperm immobilization. SIGNIFICANCE The robotic system eliminates stringent skill requirements in manual sperm immobilization. It is capable of manipulating sperms swimming in an arbitrary direction with a high success rate.
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Palacios-Cuesta M, Cortajarena AL, García O, Rodríguez-Hernández J. Patterning of individual Staphylococcus aureus bacteria onto photogenerated polymeric surface structures. Polym Chem 2015. [DOI: 10.1039/c4py01629g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This manuscript describes the fabrication of bacterial surface arrays by using photolithographic techniques having in addition some particularly interesting features.
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Affiliation(s)
- Marta Palacios-Cuesta
- Department of Chemistry and Properties of Polymers
- Instituto de Ciencia y Tecnología de Polímeros
- (ICTP-CSIC)
- 28006-Madrid
- Spain
| | - Aitziber L. Cortajarena
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia) & CNB-CSIC-IMDEA Nanociencia Associated Unit “Unidad de Nanobiotecnología”
- 28049 Madrid
- Spain
| | - Olga García
- Department of Chemistry and Properties of Polymers
- Instituto de Ciencia y Tecnología de Polímeros
- (ICTP-CSIC)
- 28006-Madrid
- Spain
| | - Juan Rodríguez-Hernández
- Department of Chemistry and Properties of Polymers
- Instituto de Ciencia y Tecnología de Polímeros
- (ICTP-CSIC)
- 28006-Madrid
- Spain
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Qiu ZY, Chen C, Wang XM, Lee IS. Advances in the surface modification techniques of bone-related implants for last 10 years. Regen Biomater 2014; 1:67-79. [PMID: 26816626 PMCID: PMC4668999 DOI: 10.1093/rb/rbu007] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2014] [Revised: 08/22/2014] [Accepted: 08/23/2014] [Indexed: 12/20/2022] Open
Abstract
At the time of implanting bone-related implants into human body, a variety of biological responses to the material surface occur with respect to surface chemistry and physical state. The commonly used biomaterials (e.g. titanium and its alloy, Co-Cr alloy, stainless steel, polyetheretherketone, ultra-high molecular weight polyethylene and various calcium phosphates) have many drawbacks such as lack of biocompatibility and improper mechanical properties. As surface modification is very promising technology to overcome such problems, a variety of surface modification techniques have been being investigated. This review paper covers recent advances in surface modification techniques of bone-related materials including physicochemical coating, radiation grafting, plasma surface engineering, ion beam processing and surface patterning techniques. The contents are organized with different types of techniques to applicable materials, and typical examples are also described.
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Affiliation(s)
- Zhi-Ye Qiu
- Institute for Regenerative Medicine and Biomimetic Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China, Beijing Allgens Medical Science and Technology Co., Ltd, Beijing 100176, China, Bio-X Center, School of Life Science, Zhejiang Sci-Tech University, Hangzhou 310018, China, and Institute of Natural Sciences, Yonsei University, Seoul 120-749, Korea
| | - Cen Chen
- Institute for Regenerative Medicine and Biomimetic Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China, Beijing Allgens Medical Science and Technology Co., Ltd, Beijing 100176, China, Bio-X Center, School of Life Science, Zhejiang Sci-Tech University, Hangzhou 310018, China, and Institute of Natural Sciences, Yonsei University, Seoul 120-749, Korea
| | - Xiu-Mei Wang
- Institute for Regenerative Medicine and Biomimetic Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China, Beijing Allgens Medical Science and Technology Co., Ltd, Beijing 100176, China, Bio-X Center, School of Life Science, Zhejiang Sci-Tech University, Hangzhou 310018, China, and Institute of Natural Sciences, Yonsei University, Seoul 120-749, Korea
| | - In-Seop Lee
- Institute for Regenerative Medicine and Biomimetic Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China, Beijing Allgens Medical Science and Technology Co., Ltd, Beijing 100176, China, Bio-X Center, School of Life Science, Zhejiang Sci-Tech University, Hangzhou 310018, China, and Institute of Natural Sciences, Yonsei University, Seoul 120-749, Korea
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Arrabito G, Reisewitz S, Dehmelt L, Bastiaens PI, Pignataro B, Schroeder H, Niemeyer CM. Biochips for cell biology by combined dip-pen nanolithography and DNA-directed protein immobilization. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:4243-4249. [PMID: 23881817 DOI: 10.1002/smll.201300941] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Indexed: 06/02/2023]
Abstract
A general methodology for patterning of multiple protein ligands with lateral dimensions below those of single cells is described. It employs dip pen nanolithography (DPN) patterning of DNA oligonucleotides which are then used as capture strands for DNA-directed immobilization (DDI) of oligonucleotide-tagged proteins. This study reports the development and optimization of PEG-based liquid ink, used as carrier for the immobilization of alkylamino-labeled DNA oligomers on chemically activated glass surfaces. The resulting DNA arrays have typical spot sizes of 4-5 μm with a pitch of 12 μm micrometer. It is demonstrated that the arrays can be further functionalized with covalent DNA-streptavidin (DNA-STV) conjugates bearing ligands recognized by cells. To this end, biotinylated epidermal growth factor (EGF) is coupled to the DNA-STV conjugates, the resulting constructs are hybridized with the DNA arrays and the resulting surfaces used for the culturing of MCF-7 (human breast adenocarcinoma) cells. Owing to the lateral diffusion of transmembrane proteins in the cell's plasma membrane, specific recruitment and concentration of EGF receptor can be induced specifically at the sites where the ligands are bound on the solid substrate. This is a clear demonstration that this method is suitable for precise functional manipulations of subcellular areas within living cells.
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Affiliation(s)
- Giuseppe Arrabito
- Technische Universität Dortmund, Fakultät Chemie, Biologisch-Chemische Mikrostrukturtechnik, Otto Hahn Str. 6, 44227 Dortmund, Germany; Karlsruhe Institute of Technology (KIT), Institute for Biological Interfaces (IBG 1), Hermann-von-Helmholtz-Platz, D-76344 Eggenstein-Leopoldshafen, Germany; Scuola Superiore di Catania, Via Valdisavoia 9, 95123 Catania, Italy
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Wu CC, Reinhoudt DN, Otto C, Subramaniam V, Velders AH. Strategies for patterning biomolecules with dip-pen nanolithography. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2011; 7:989-1002. [PMID: 21400657 DOI: 10.1002/smll.201001749] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Indexed: 05/30/2023]
Abstract
Dip-pen nanolithography (DPN) is an atomic force microscopy (AFM)-based lithography technique, which has the ability to fabricate patterns with a feature size down to approximately 15 nm using both top-down and bottom-up approaches. DPN utilizes the water meniscus formed between an AFM tip and a substrate to transfer ink molecules onto surfaces. A major application of this technique is the fabrication of micro- and nano-arrays of patterned biomolecules. To achieve this goal, a variety of chemical approaches has been used. This review concisely describes the development of DPN in the past decade and presents the related chemical strategies that have been reported to fabricate biomolecular patterns with DPN at micrometer and nanometer scale, classified into direct- and indirect DPN methodologies, discussing tip-functionalization strategies as well.
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Affiliation(s)
- Chien-Ching Wu
- Laboratory for Supramolecular Chemistry and Technology, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500AE, Enschede, The Netherlands
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