The relationship among H₂S, neuroinflammation and MMP-9 in BBB injury following ischemic stroke

Area of Science:

• Neuroscience
• Biochemistry
• Pathology

Background:

• The blood-brain barrier (BBB) is crucial for central nervous system (CNS) homeostasis, but its damage is implicated in CNS diseases like ischemic stroke.
• Neuroinflammation and matrix metalloproteinases (MMPs) exacerbate BBB breakdown following cerebral ischemia, leading to neuronal injury and poor neurological outcomes.
• Hydrogen sulfide (H2S) is a gaseous signaling molecule with known neuroprotective properties.

Purpose of the Study:

• To review the detrimental roles of neuroinflammation and MMPs in BBB injury post-ischemic stroke.
• To provide an updated overview of H2S's protective mechanisms against BBB damage in ischemic stroke.
• To highlight H2S's potential in mitigating stroke-induced neuroinflammation and MMP activity.

Main Methods:

• Literature review of existing research on BBB function, ischemic stroke pathology, neuroinflammation, MMPs, and H2S.
• Analysis of studies investigating the molecular mechanisms underlying BBB breakdown during cerebral ischemia.
• Synthesis of evidence on the therapeutic potential of H2S in preclinical models of stroke.

Main Results:

• Neuroinflammation and MMPs, particularly MMP-9, are key contributors to BBB disruption following ischemic stroke.
• Low concentrations of H2S demonstrate significant neuroprotection against BBB damage.
• H2S exerts its protective effects by suppressing neuroinflammation and inhibiting MMP activity.

Conclusions:

• Targeting neuroinflammation and MMPs represents a viable therapeutic strategy for protecting the BBB after ischemic stroke.
• Hydrogen sulfide (H2S) shows promise as a neuroprotective agent against BBB injury by modulating these detrimental pathways.
• Further research into H2S-based therapies could lead to improved outcomes for patients suffering from ischemic stroke.