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MALDI-MS-imaging of whole human lens capsule

Citation

Ronci, M and Sharma, S and Chataway, T and Burdon, KP and Martin, S and Craig, JE and Voelcker, NH, MALDI-MS-imaging of whole human lens capsule, Journal of Proteome Research, 10, (8) pp. 3522-3529. ISSN 1535-3893 (2011) [Refereed Article]

Copyright Statement

Copyright 2011 American Chemical Society

DOI: doi:10.1021/pr200148k

Abstract

The ocular lens capsule is a smooth, transparent basement membrane that encapsulates the lens and is composed of a rigid network of interacting structural proteins and glycosaminoglycans. During cataract surgery, the anterior lens capsule is routinely removed in the form of a circular disk. We considered that the excised capsule could be easily prepared for matrix-assisted laser desorption/ionization time-of-flight mass spectrometry imaging (MALDI-MSI) analysis. MALDI-MSI is a powerful tool to elucidate the spatial distribution of small molecules, peptides, and proteins within tissues. Here, we apply this molecular imaging technique to analyze the freshly excised human lens capsule en face. We demonstrate that novel information about the distribution of proteins by MALDI-MSI can be obtained from this highly compact connective tissue, having no evident histo-morphological characteristics. Trypsin digestion carried out on-tissue is shown to improve MALDI-MSI analysis of human lens capsules and affords high repeatability. Most importantly, MALDI-MSI analysis reveals a concentric distribution pattern of proteins such as apolipoprotein E (ApoE) and collagen IV alpha-1 on the anterior surface of surgically removed lens capsule, which may indicate direct or indirect effects of environmental and mechanical stresses on the human ocular lens.

Item Details

Item Type:Refereed Article
Keywords:apolipoprotein E; collagen IV alpha-1; human lens capsule; MALDI-MSI; proteomics; trypsin digestion
Research Division:Medical and Health Sciences
Research Group:Ophthalmology and Optometry
Research Field:Ophthalmology
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Hearing, Vision, Speech and Their Disorders
Author:Burdon, KP (Associate Professor Kathryn Burdon)
ID Code:90644
Year Published:2011
Web of Science® Times Cited:16
Deposited By:Menzies Institute for Medical Research
Deposited On:2014-04-15
Last Modified:2017-11-06
Downloads:0

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