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[Vasoactive intestinal peptide (VIP) concentration in ischemic rat brain microvessels]
1PUMC Hospital, Beijing.
Summary
Vasoactive intestinal peptide (VIP) levels increase in brain microvessels during ischemia. This rise in VIP may trigger vasodilation, potentially protecting the brain from ischemic injury.
Area of Science:
- Neuroscience
- Vascular Biology
- Biochemistry
Context:
- Vasoactive intestinal peptide (VIP) is found in neurons innervating cerebral vasculature.
- VIP is a known vasodilator of cerebral vessels.
- Understanding VIP's role in cerebral ischemia is crucial for neuroprotection.
Purpose:
- To investigate VIP content in brain microvessels.
- To determine changes in VIP levels during incomplete brain ischemia.
Summary:
- VIP was measured in rat and gerbil brain microvessels subjected to ischemic conditions.
- Following 30 minutes of ischemia, VIP content significantly increased in rat brain microvessels.
- Ischemic gerbils also showed significantly higher VIP levels compared to controls.
Impact:
- VIP is present in brain microvessels of rats and gerbils.
- Increased VIP during ischemia may induce vasodilation and enhance cerebral blood flow.
- This response could be an autoregulatory mechanism to protect the ischemic brain.