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https://hdl.handle.net/2440/45435
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Type: | Journal article |
Title: | How regenerating lymphatics function: Lessons from lizard tails |
Author: | Blacker, H. Tsopelas, C. Orgeig, S. Daniels, C. Chatterton, B. |
Citation: | Anatomical Record, 2007; 290(1):108-114 |
Publisher: | Wiley-Liss |
Issue Date: | 2007 |
ISSN: | 1552-4906 1932-8494 |
Statement of Responsibility: | Helen A. Blacker, Chris Tsopelas, Sandra Orgeig, Christopher B. Daniels and Barry E. Chatterton |
Abstract: | Rational treatment of lymphoedema may be improved in the future with a better understanding of the physiological processes involved in the regeneration of new lymphatic vessels (lymphangiogenesis). Many lizard species undergo tail autotomy as a predator escape response and subsequently regenerate nonlymphoedematous tails. Such species may offer novel models for examining lymphangiogenesis. In this lymphoscintigraphic evaluation, three radioactive tracers were employed, (99m)Tc-antimony trisulphide colloid (approximately 10 nm diameter), (99m)Tc-tin fluoride colloid (approximately 2,000 nm; (99m)Tc-TFC), and (99m)Tc-diethylenetriaminepentaacetic acid (soluble; (99m)Tc-DTPA), to examine lymphatic function in regenerating tails of the Australian marbled gecko, Christinus marmoratus. Rate of local clearance and velocity of migration were determined in geckos with original tails and at 6, 9, 12, and >24 weeks after autotomy. In original-tailed geckos, the smaller radiocolloid was cleared to a greater extent and had a faster lymph velocity than in geckos with regenerated tails. The same parameters measured for larger particles were greater in early regeneration than later. (99m)Tc-TFC did not migrate from the injection site in fully regenerated and original gecko tails, which indicates that larger particles are increasingly impeded as tail regeneration progresses. Soluble (99m)Tc-DTPA diffused from the injection site extremely rapidly via venous capillaries in all tails, confirming that the slower clearance of the colloids is solely via the lymphatics. Differences in clearance and lymph velocity between differently sized colloids throughout tail regeneration may be influenced by changes in surrounding tissue structure density and the lymphatic vessel porosity. |
Keywords: | Intercellular Junctions Tail Lymphatic System Lymphatic Vessels Animals Lizards Technetium Radioactive Tracers Colloids Radionuclide Imaging Regeneration Cell Membrane Permeability |
Description: | Published in The Anatomical Record Part B: The New Anatomist, 2007; 290 (1):108-114 at www.interscience.wiley.com |
DOI: | 10.1002/ar.20410 |
Published version: | http://dx.doi.org/10.1002/ar.20410 |
Appears in Collections: | Aurora harvest 6 Earth and Environmental Sciences publications |
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