cancer-research-structural-biochemistry-2019-posters

Page 63

Volume 3

August 5-6, 2019 | Singapore

CANCER RESEARCH AND PHARMACOLOGY

STRUCTURAL BIOCHEMISTRY, STEM CELLS AND MOLECULAR BIOLOGY

International Conference on

International Congress on

Cancer Research 2019 & Structural Biochemistry 2019

August 5-6, 2019

Journal of Cancer and Metastasis Research

Melatonin improves therapeutic potential of mesenchymal stem cells- derived exosomes

against renal ischemia-reperfusion injury in rats

Faisal A Alzahrani

King Abdulaziz University, KSA

Background

: Renal ischemia-reperfusion injury (RIRI) is one of the main causes for acute kidney injury (AKI). Many previous

attempts failed to adopt a suitable treatment regimen for AKI. Recently, combined melatonin (Mel) and mesenchymal stem

cell (MSC)-derived exosomes (Exo) therapy gave a promising therapeutic option for acute liver ischemic injury, however this

treatment approach has not been tested against RIRI yet.

Aim

: This study tested the hypothesis that administration of exosomes derived from MSCs preconditioned with Mel gave best

protection against RIRI as compared to therapy by MSCs or exosomes derived from non-preconditioned MSCs. Materials and

Methods: Female adult rats (n = 50) equally divided into control group, sham group, RIRI group (induced by bilateral renal

arteries clamping), RIRI + MSCs group (1 x10 6 bone marrow derived MSCs), RIRI + Exo group (250 μg Exo derived from no-

preconditioned MSCs), and RIRI + Mel + Exo group (250 μg Exo derived from Mel preconditioned MSCs). MSCs or Exo was

bilaterally injected once in each renal artery during reperfusion.

Results

: The obtained results revealed notable improvement in RIRI following all treatment (MSCs, Exo, and Exo+Mel) with

best improvement in Exo+Mel group as evidenced by: 1) decreased kidney injury histopathological score; 2) reduced blood

levels of kidney damage markers [blood urea nitrogen (BUN) and creatinine]; 3) declined oxidative stress status (MDA level,

HIF1α gene, and NOX2 protein); 4) increased anti-oxidant status (HO1 gene, and SOD, CAT, GPx activities); 5) declined

apoptosis (caspase 3 activity and mRNA, and PARP1, Bax genes), 6) induced anti- apoptotic effect (Bcl2 gene); 7) inhibition

of inflammation (decreased ICAM1, IL1β, NFκB and increased IL10 genes); 8) improved regeneration (bFGF, HGF and SOX9

proteins); and 9) enhanced angiogenesis (VEGF gene).

Conclusion

: Treatment with exosomes derived from MSCs preconditioned with melatonin gave best protective effect against

renal ischemia-reperfusion injury as compared to therapy by non-preconditioned MSCs or their exosomes.