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[Pancreatic blood flow and its regulation]
1Zakładu Fizjologii Doświadczalnej, Instytutu Fizjologii, Collegium Medicum, Uniwersytetu Jagiellońskiego, Krakow.
Przeglad Lekarski
|January 1, 1994
Summary
The pancreas
Area of Science:
- Physiology
- Vascular Biology
- Neuroendocrinology
Context:
- Pancreatic circulation is regulated by complex hemodynamic, neural, and hormonal factors.
- Autonomic nervous system activity significantly impacts pancreatic blood flow (PBF).
- Vasoactive peptides, hormones, and local autoregulatory mechanisms also play crucial roles.
Purpose:
- To elucidate the intricate regulatory mechanisms governing pancreatic blood flow.
- To detail the roles of the autonomic nervous system and various vasoactive substances in controlling pancreatic circulation.
- To highlight the contribution of endothelium-derived nitric oxide (NO) in pancreatic vasodilation.
Summary:
- Sympathetic stimulation decreases PBF via norepinephrine and NPY release, while parasympathetic stimulation increases PBF through acetylcholine and other neuropeptides.
- Neurotransmitters from the non-adrenergic, non-cholinergic (NANC) system, including substance P (SP) and vasoactive intestinal peptide (VIP), act as potent vasodilators.
- Functional hyperemia in the pancreas is mediated by factors like low oxygen, ions, kinins, prostaglandins (PGs), nucleotides, gastrointestinal hormones, and importantly, endothelium-derived NO.
Impact:
- Provides a comprehensive overview of pancreatic circulation control, essential for understanding pancreatic physiology and disease.
- Identifies key molecular and neural pathways involved in regulating pancreatic blood flow, offering potential therapeutic targets.
- Emphasizes the significant role of nitric oxide in pancreatic vasodilation, opening avenues for further research in conditions affecting pancreatic perfusion.