Maximus Peto’s Commentary
I wonder whether this interesting report of kidney regeneration might be relevant for repairing or rejuvenating dysfunctional kidneys in aging humans.
In vivo regeneration of interspecies chimeric kidneys using a nephron progenitor cell replacement system.
Sci Rep. 2019 May 6;9(1):6965.
Toshinari Fujimoto, Shuichiro Yamanaka, Susumu Tajiri, Tsuyoshi Takamura, Yatsumu Saito, Kei Matsumoto, Kentaro Takase, Shohei Fukunaga, Hirotaka James Okano, Takashi Yokoo
PubMed publication date (edat): 5/8/2019
…By transplanting exogeneous nephron progenitor cells (NPCs) into the metanephric mesenchyme of a xenogeneic foetus, we aimed to regenerate neo-kidneys that originate from transplanted NPCs. Previously, we generated a transgenic mouse model enabling drug-induced ablation of NPCs (the Six2-iDTR mouse). We demonstrated that eliminating existing native host NPCs allowed their 100% replacement with donor mouse or rat NPCs, which could generate neo-nephrons on a culture dish. To apply this method to humans in the future, we examined the possibility of the in vivo regeneration of nephrons between different species via NPC replacement. We injected NPCs-containing rat renal progenitor cells and diphtheria toxin below the renal capsule of E13.5 metanephroi (MNs) of Six2-iDTR mice; the injected MNs were then transplanted into recipient rats treated with immunosuppressants. Consequently, we successfully regenerated rat/mouse chimeric kidneys in recipient rats receiving the optimal immunosuppressive therapy. We revealed a functional connection between the neo-glomeruli and host vessels and proper neo-glomeruli filtration. In conclusion, we successfully regenerated interspecies kidneys in vivo that acquired a vascular system. This novel strategy may represent an effective method for human kidney regeneration.
Free Full-Text: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6502858/