Effects of miR-190a-3p on Sevoflurane-induced postoperative cognitive dysfunction (POCD)

Area of Science:

• Neuroscience
• Molecular Biology
• Pharmacology

Background:

• Postoperative cognitive dysfunction (POCD) is a common complication following anesthesia, particularly Sevoflurane.
• Oxidative stress (OS) and inflammation are key contributors to POCD pathogenesis.
• The therapeutic potential of miR-190a-3p in cognitive dysfunction is emerging, but its role in POCD remains undefined.

Purpose of the Study:

• To investigate the protective effects and underlying mechanisms of miR-190a-3p in a rat model of Sevoflurane-induced POCD.
• To explore miR-190a-3p as a potential biomarker and therapeutic target for POCD.

Main Methods:

• Sevoflurane administration was used to establish a POCD rat model.
• Rats were treated with miR-190a-3p mimics or a negative control.
• Cognitive function, OS markers, inflammatory cytokines, and key signaling pathways (Nrf2/TLR4/NF-κB) were assessed.

Main Results:

• miR-190a-3p was downregulated in POCD rats, and its administration reversed cognitive deficits.
• miR-190a-3p treatment reduced OS markers (MDA, SOD, GSH) and suppressed inflammation (proinflammatory cytokines).
• miR-190a-3p administration restored Nrf2 levels and inhibited TLR4/NF-κB signaling activation.

Conclusions:

• miR-190a-3p exhibits significant protective effects against Sevoflurane-induced POCD in rats.
• The mechanism involves the repression of oxidative stress and inflammation via the Nrf2 pathway.
• miR-190a-3p represents a promising therapeutic candidate for preventing and treating POCD.