NDLI: Microfluidic pillar array sandwich immunofluorescence assay for ocular diagnostics

Content Provider	Springer Nature Link
Author	Green, James V. Sun, Dawei Hafezi Moghadam, Ali Lashkari, Kameran Murthy, Shashi K.
Copyright Year	2011
Abstract	Uveitis and primary intraocular lymphoma (PIOL) are diseases associated with the invasion of lymphocytes into various regions of the eye, accompanied by expression of inflammatory cytokines. While these diseases are very different in terms of survivability and treatment options they have similar symptoms that make accurate diagnosis challenging. Furthermore, the diagnostic yield with state-of-the-art techniques for cell and cytokine analysis of vitreous and aqueous humor samples is under 20% due to inadequate sensitivity. This paper describes a simple sandwich immunofluorescence assay (sIFA) microfluidic device that is capable of identifying important analytes in ocular biopsies as a potential alternative to current diagnostic approaches. Detection is accomplished by capture of the target molecules on antibody-coated, vertical, oval shaped pillars in a microfluidic device followed by a biotinylated detection antibody and finally florescent avidin for target molecule quantification. Cytokine concentration measurements were carried out on aqueous humor samples from rats with endotoxin-induced uveitis as well as human cataract patients. Results correlated well with conventional protein quantification techniques and additionally, measurements from the human samples surpassed detection limits of current state-of-the-art immunoassay techniques. The single-digit femtomolar range of detection of this sIFA system provides lower limits of detection when compared to traditional techniques and allows for the mapping of the cytokine content of vitreous biopsies with detection limits that have yet to be realized using cost effective microfluidics. Furthermore, the relative simplicity of the device design, fabrication and ability to automate makes it easily translatable from the laboratory to a clinical setting.
Starting Page	573
Ending Page	583
Page Count	11
File Format	PDF
ISSN	13872176
Journal	Biomedical Microdevices
Volume Number	13
Issue Number	3
e-ISSN	15728781
Language	English
Publisher	Springer US
Publisher Date	2011-04-02
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Microfluidic Immunoassay Uveitis intraocular lymphoma Nanotechnology Engineering Fluid Dynamics Biophysics and Biological Physics Biomedical Engineering
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Molecular Biology Biomedical Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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