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03.09.2019 | Original article

rAAV6-mediated miR-29b delivery suppresses renal fibrosis

verfasst von: Suguru Saito, Shin-ichiro Ohno, Yuichirou Harada, Keiki Oikawa, Koji Fujita, Shouichirou Mineo, Asako Gondo, Yoshihiko Kanno, Masahiko Kuroda

Erschienen in: Clinical and Experimental Nephrology | Ausgabe 12/2019

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Abstract

Background

Previous studies showed that microRNA-29b (miR-29b) inhibits renal fibrosis. Therefore, miR-29b replacement therapy represents a promising approach for treating renal fibrosis. However, an efficient method of kidney-targeted miRNA delivery has yet to be established. Recombinant adeno-associated virus (rAAV) vectors have great potential for clinical application. For kidney-targeted gene delivery, the most suitable AAV serotype has yet to be established. Here, we identified the most suitable AAV serotype for kidney-targeted gene delivery and determined that AAV-mediated miR-29b delivery can suppress renal fibrosis in vivo.

Method

To determine which AAV serotype is suitable for kidney cells, GFP-positive cells were identified by flow cytometry after the infection of rAAV serotype 1–9 vectors containing the EGFP gene. Next, we injected rAAV vectors into the renal pelvis to determine transduction efficiency in vivo. GFP expression was measured seven days after injecting rAAV serotype 1–9 vectors carrying the EGFP gene. Finally, we investigated whether rAAV6-mediated miR-29b delivery can suppress renal fibrosis in UUO mouse model.

Results

We found that rAAV6 vector is the most suitable for targeting kidney cells regardless of animal species in vitro and rAAV6 is the most suitable vector for kidney-targeted in vivo gene delivery in mice. Intra-renal pelvic injection of rAAV vectors can transduce genes into kidney TECs. Furthermore, rAAV6-mediated miR-29b delivery attenuated renal fibrosis in UUO model by suppressing Snail1 expression.

Conclusion

Our study has revealed that rAAV6 is the most suitable serotype for kidney-targeted gene delivery and rAAV6-mediated miR-29b delivery into kidney TECs can suppress established renal fibrosis.

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Titel: rAAV6-mediated miR-29b delivery suppresses renal fibrosis
verfasst von: Suguru Saito
Shin-ichiro Ohno
Yuichirou Harada
Keiki Oikawa
Koji Fujita
Shouichirou Mineo
Asako Gondo
Yoshihiko Kanno
Masahiko Kuroda
Publikationsdatum: 03.09.2019
Verlag: Springer Singapore
Erschienen in: Clinical and Experimental Nephrology / Ausgabe 12/2019
Print ISSN: 1342-1751
Elektronische ISSN: 1437-7799
DOI: https://doi.org/10.1007/s10157-019-01783-w

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rAAV6-mediated miR-29b delivery suppresses renal fibrosis

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