| Abstract: |
Adipose mesenchymal stem cell-derived exosomes and the
PDE4 inhibitor roflumilast (ROF) are investigated as potential treatments for
chronic kidney disease (CKD). The exosomes are extracted and analyzed using
electron microscopy and flow cytometry, then employed with ROF for in vivo
implantation in a CKD animal model. Animals aredivided into seven groups.
Group (I) Control; (II) exosomes; (III) ROF; (IV) Adriamycin (ADR); (V) ADR
+ exosomes, (VI) ADR + ROF, and (VII) ADR + Exosomes+ ROF. Biochemical
serum indicators (creatinine, BUN), antioxidant status (GSH, MDA),
and the mRNA expressions of TGF-𝜷1, Smad3, IL-6, BAX, Wnt-7, FN, and
miRNA145-5p are determined using qRT-PCR. Histology assessment using
H&E staining, ultrastructural observation using TEM, and protein expression
in kidney tissue (FN1 and BAX) are assessed. The isolated exosomes showed
cup-shaped morphologyand expressed CD81, CD9, and CD63. Exosomes and
ROF increased glutathione (GSH) levels while decreasing malondialdehyde
(MDA) levels. Further, ROF and exosomes treatment lowered
the expression of the apoptotic indicators BAX, the fibrotic markers TGF𝜷1,
Smad3, Wnt7a, and FN1, and the inflammatory marker IL6, and increased
the expression of miRNA-145. Moreover, ROF and exosomes improved
histological and ultrastructural examination. In conclusion, exosomes
and ROF can protect against CKD by reducing apoptosis and fibrosis.
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