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Updated: Jul 15, 2026
04:38
A Murine Tail Lymphedema Model
Published on: February 10, 2021
How regenerating lymphatics function: lessons from lizard tails.
Helen A Blacker1, Chris Tsopelas, Sandra Orgeig
1Environmental Biology, School of Earth and Environmental Sciences, University of Adelaide, Adelaide, Australia.
Anatomical Record (Hoboken, N.J. : 2007)
|April 19, 2007
Summary
Lizard tail regeneration offers insights into lymphangiogenesis. Smaller particles cleared faster in original gecko tails, while larger particles showed reduced migration during regeneration, indicating changes in lymphatic function.
Area of Science:
- * Regenerative Medicine
- * Comparative Physiology
- * Lymphatic Biology
Background:
- * Lymphoedema treatment requires understanding lymphangiogenesis.
- * Lizards regenerating non-lymphoedematous tails serve as models for lymphatic vessel regeneration.
- * Lymphatic function in regenerating tissues is not fully understood.
Purpose of the Study:
- * To evaluate lymphatic function in regenerating gecko tails using lymphoscintigraphy.
- * To compare lymphatic clearance and particle migration rates using tracers of different sizes.
- * To investigate how tail regeneration impacts lymphatic transport.
Main Methods:
- * Lymphoscintigraphy was performed on Australian marbled geckos (Christinus marmoratus) with original and regenerating tails (6, 9, 12, >24 weeks post-autotomy).
- * Three radioactive tracers were used: (99m)Tc-antimony trisulphide colloid (small, ~10 nm), (99m)Tc-tin fluoride colloid (large, ~2,000 nm), and (99m)Tc-diethylenetriaminepentaacetic acid (soluble).
- * Clearance rates and migration velocities of tracers were measured to assess lymphatic function.
Main Results:
- * Smaller radiocolloids showed greater clearance and faster lymph velocity in original tails compared to regenerated tails.
- * Clearance and migration of larger particles were higher in early regeneration, decreasing over time.
- * Large particles (99m)Tc-tin fluoride colloid did not migrate in fully regenerated or original tails, indicating impeded transport.
- * Soluble (99m)Tc-DTPA diffused rapidly via venous capillaries, confirming colloid clearance was lymphatic.
- * Differences in clearance and velocity suggest altered tissue density and lymphatic vessel porosity during regeneration.
Conclusions:
- * Tail regeneration in geckos involves dynamic changes in lymphatic function.
- * Lymphatic vessel porosity and tissue structure influence the transport of different-sized particles.
- * Gecko tail regeneration models provide valuable insights into lymphangiogenesis relevant to lymphoedema research.
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