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Current Pharmaceutical Design

Editor-in-Chief

ISSN (Print): 1381-6128
ISSN (Online): 1873-4286

Research Article

Novel Insights into the Molecular Mechanisms Involved in the Neuroprotective Effects of C-Phycocyanin against Brain Ischemia in Rats

Author(s): Javier Marín-Prida, José Luiz Liberato, Alexey Llópiz-Arzuaga, Karina Stringhetta-Padovani, Nancy Pavón-Fuentes, Andréia Machado Leopoldino, Osmany Guirola Cruz, Ignacio Hernández González, Mariela León Pérez, Antoni Camins, Wagner Ferreira dos Santos, Sergio Akira Uyemura, Gilberto L. Pardo-Andreu and Giselle Pentón-Rol*

Volume 28, Issue 14, 2022

Published on: 02 June, 2022

Page: [1187 - 1197] Pages: 11

DOI: 10.2174/1381612828666220506145542

Price: $65

Abstract

Background: Ischemic stroke produces a large health impact worldwide, with scarce therapeutic options.

Objective: This study aimed to reveal the role of NADPH oxidase and neuroinflammatory genes in the cerebral anti-ischemic effects of C-Phycocyanin (C-PC), the chief biliprotein of Spirulina platensis.

Methods: Rats with either focal cerebral ischemia/reperfusion (I/R) or acute brain hypoperfusion, received C-PC at different doses, or a vehicle, for up to 6 h post-stroke. Neurological, behavioral and histochemical parameters were assessed in I/R rats at 24 h. Cerebral gene expression and hippocampal neuron viability were evaluated in hypoperfused rats at acute (24 h) or chronic phases (30 days), respectively. A molecular docking analysis of NOX2 and C-PC-derived Phycocyanobilin (PCB) was also performed.

Results: C-PC, obtained with a purity of 4.342, significantly reduced the infarct volume and neurological deficit in a dose-dependent manner, and improved the exploratory activity of I/R rats. This biliprotein inhibited NOX2 expression, a crucial NADPH oxidase isoform in the brain, and the superoxide increase produced by the ischemic event. Moreover, C-PC-derived PCB showed a high binding affinity in silico with NOX2. C-PC downregulated the expression of pro-inflammatory genes (IFN-γ, IL-6, IL-17A, CD74, CCL12) and upregulated immune suppressive genes (Foxp3, IL-4, TGF-β) in hypoperfused brain areas. This compound also decreased chronic neuronal death in the hippocampus of hypoperfused rats.

Conclusion: These results suggest that the inhibition of cerebral NADPH oxidase and the improvement of neuroinflammation are key mechanisms mediating the neuroprotective actions of C-PC against brain ischemia.

Keywords: C-Phycocyanin, ischemic stroke, NADPH oxidase, neuroprotection, neuroinflammation, brain ischemia.

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