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Msx1/2 Stem Cells Spur Nerve-Independent Digit Regeneration

5/10/2026

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Summary

Msx1 Cells Regenerate

Researchers found Msx1- and Msx2-overexpressing bone marrow mesenchymal stem cells generate blastema-like cells and boost digit tip regeneration in mice.
Extracellular vesicles from Msx1-overexpressing cells further enhanced regeneration in an amputee mouse model.
BMP2, BMP4, BMP9 and FGF8 signaling induced segment-specific skeletal and joint regeneration by forming new endochondral ossification centers.
Hyperbaric oxygen promoted bone growth and organized collagen deposition, while denervation did not inhibit digit tip regeneration, indicating nerve independence.

Summary

Urodele Limbs Regenerate

Butler (1955) showed urodele forelimbs regenerate after reversal of their proximo-distal axis.
Mariani, Ahn and Martin (2008) gave genetic evidence that fibroblast growth factors direct proximal-distal limb patterning.
Jazwinska and Sallin (2016) compared regeneration with scarring across vertebrate appendages and the heart.
Satoh et al. (2010) identified mechanisms controlling proximal-distal intercalation during axolotl limb regeneration.
Muneoka and Dawson (2021) traced the evolutionary emergence of epimorphic regeneration within mammalian lineages.

Summary

Guidelines Standardize

Bouxsein et al. published 2010 guidelines that standardize micro-computed tomography protocols for rodent bone microstructure assessment.
Doube et al. introduced BoneJ in 2010 as a free, extensible ImageJ plug-in for quantitative bone image analysis.
Yu et al. reported in 2014 that angiogenesis functions as an inhibitory factor during mammalian digit regeneration.
Franzen, Gan & Bjorkegren launched PanglaoDB in 2019, a web server for exploring mouse and human single-cell RNA-seq data.

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Msx1 Cells Regenerate

Researchers found Msx1- and Msx2-overexpressing bone marrow mesenchymal stem cells generate blastema-like cells and boost digit tip regeneration in mice.
Extracellular vesicles from Msx1-overexpressing cells further enhanced regeneration in an amputee mouse model.
BMP2, BMP4, BMP9 and FGF8 signaling induced segment-specific skeletal and joint regeneration by forming new endochondral ossification centers.
Hyperbaric oxygen promoted bone growth and organized collagen deposition, while denervation did not inhibit digit tip regeneration, indicating nerve independence.

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