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Mixed-mode pattern in Doublefoot mutant mouse limb--Turing reaction-diffusion model on a growing domain during limb
Takashi Miura1, Kohei Shiota, Gillian Morriss-Kay
1Congenital Anomaly Research Center, Kyoto University Graduate School of Medicine, Yoshida Konoe-chou, Sakyo-Ku, 606-8501, Japan. miura-takashi@umin.ac.jp
Journal of Theoretical Biology
|December 21, 2005
Summary
The Turing reaction-diffusion model explains limb development anomalies in Doublefoot mutant mice, where numerical simulations replicate observed supernumerary digits. This study provides experimental evidence for the model
Area of Science:
- Developmental biology
- Mathematical biology
- Genetics
Background:
- The Turing reaction-diffusion model is hypothesized to regulate limb development.
- Experimental evidence supporting this model in limb development has been scarce.
Purpose of the Study:
- To investigate the applicability of the Turing reaction-diffusion model to limb development using a mouse model.
- To provide experimental evidence for the Turing model in the context of limb bud growth and digit formation.
Main Methods:
- Studied Doublefoot mutant mice exhibiting supernumerary digits due to limb bud overexpansion.
- Performed numerical simulations of the simplest Turing reaction-diffusion model on a growing domain.
- Analyzed activator kinetics and pattern formation within the model.
Main Results:
- Observed thin digits in the proximal limb bud of mutants, abruptly normalizing distally.
- Successfully reproduced this digit patterning phenomenon using numerical simulations of the Turing model.
- Linked the observed pattern to activator kinetics saturation in the reaction-diffusion model.
Conclusions:
- The Turing reaction-diffusion model can explain digit abnormalities in limb development.
- The model accounts for experimentally observed phenomena in limb bud development.
- The study offers testable predictions for future experimental validation.