alexa Preclinical Evaluation of Symmetrical Diiodinated Squaraine Dye on Experimental Animal Models | OMICS International | Abstract
ISSN: 2168-958X

Journal of Glycobiology
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Research Article

Preclinical Evaluation of Symmetrical Diiodinated Squaraine Dye on Experimental Animal Models

Soumya MS and Annie Abraham*
Department of Biochemistry, University of Kerala, Kariavattom, Thiruvananthapuram 695 581, Kerala, India
Corresponding Author : Dr. Annie Abraham
Professor, Department of Biochemistry
University of Kerala, Kariavattom
Thiruvananthapuram – 695 581, Kerala, India
Tel: +91-471-2418078; +91-9447246692
E-mail: [email protected]
Received February 28, 2013; Accepted May 26, 2013; Published May 28, 2013
Citation: Soumya MS, Abraham A (2013) Preclinical Evaluation of Symmetrical Diiodinated Squaraine Dye on Experimental Animal Models. J Glycobiol S1:003. doi:10.4172/2168-958X.S1-003
Copyright: © 2013 Soumya MS, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

Photodynamic therapy involves administration of a tumor localizing photosensitizing agent, followed by the activation of the agent by light of a specific wavelength. This therapy results in a sequence of photochemical and photobiological processes that cause irreversible photo damage to the tumor tissue. Only a few photosensitizers have received official approval around the world. But they are with some adverse side effects. Because of these draw backs search for new photosensitizers is in progress. The dye selected in our study- Symmetric diiodinated squaraine- is one of these newly developed photosensitizers. We have examined the in vivo distribution of the dye on normal and skin tumor induced animal models to check the retention time of the dye. The mechanism of action of photosensitizers in selective killing of cancer cells involves the generation of oxidative stress whereby the malignant cells are damaged, in presence of light of appropriate wavelength. Thus we also intended to study whether there is the initiation of oxidative damage in the normal tissues in the body of dye injected mice in the absence of light. The results show that maximum amount of the dye was accumulated in the different organs of the body 4 h after the administration. The compound is tumor specific since after 24 h of injection, it was retained only in the tumor site and in the immediate surroundings of the tumor. This shows the selectivity of the dye to tumor tissue. The administration of the squaraine dye in the system induces no significant change in the level of lipid peroxidation products and activity of antioxidant enzymes when compared to the control mice. This indicates that the squaraine dye does not induce any oxidative stress to the normal tissues in the body and hence the dye can be safely used for photodynamic therapy.

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