Targeting HMGB1 to Attenuate Myocardial Ischaemia-reperfusion Injury (MIRI)-induced Cognitive Dysfunction

Area of Science:

• Cardiovascular Research
• Neuroscience
• Immunology

Background:

• Myocardial Ischaemia-Reperfusion Injury (MIRI) is a significant cause of cognitive dysfunction.
• High-Mobility Group Box 1 (HMGB1) acts as a key mediator in the heart-brain axis during MIRI.
• HMGB1 triggers inflammation and neuroinflammation, disrupting the Blood-Brain Barrier (BBB) and leading to cognitive impairment.

Purpose of the Study:

• To review the role of HMGB1 in MIRI and associated cognitive dysfunction.
• To elucidate the potential interplay between HMGB1 and Meteorin-like (Metrnl).
• To explore the HMGB1/Metrnl antagonism as a therapeutic target for MIRI-induced cognitive impairment.

Main Methods:

• Literature review of recent studies on HMGB1, MIRI, and cognitive dysfunction.
• Analysis of the molecular mechanisms involving HMGB1, TLR2/4, RAGE, and BBB integrity.
• Investigation of the potential functional antagonism between HMGB1 and Metrnl.

Main Results:

• HMGB1, released during MIRI, activates inflammatory pathways (TLR2/4, RAGE).
• This activation leads to neuroinflammation, BBB disruption, microglial activation, and synaptic dysfunction.
• Emerging evidence suggests Metrnl plays a critical role in both MIRI and cognitive function.

Conclusions:

• The HMGB1/Metrnl functional antagonism presents a promising therapeutic avenue for MIRI-induced cognitive impairment.
• Targeting this interplay could mitigate long-term disability and reduce socioeconomic burdens associated with MIRI.
• Further research into the HMGB1/Metrnl axis is crucial for developing effective treatments.