Non-adrenergic non-cholinergic relaxation of the rat stomach.
1. Receptive and adaptive relaxations of the proximal third of the stomach are reflex responses that enable the stomach to accommodate large volumes with minimal increases in intraluminal pressure. The smooth muscle relaxations are termed non-adrenergic non-cholinergic (NANC). 2. Nitric oxide (NO) and vasoactive intestinal polypeptide (VIP) are considered to be the principal neurotransmitters of NANC relaxation of the rat stomach. NO appears to be mainly responsible for the speed of the relaxation and VIP appears to be responsible for the duration. 3. Studies indicate that inhibitory neurons may also release other neurotransmitters, such as adenosine triphosphate (ATP) and peptide histidine isoleucine (PHI). 4. NANC relaxation of the rat stomach is a complex phenomenon that appears to involve many neurotransmitters, each with a specific role.
Currò
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Institute of Pharmacology, Catholic University School of Medicine, Rome, Italy.
Preziosi
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D000255:Adenosine Triphosphate / Q000502:physiology; D000818:Animals; D004558:Electric Stimulation; D005753:Gastric Mucosa / Q000378:metabolism; D066298:In Vitro Techniques; D009126:Muscle Relaxation / Q000502:physiology; D009130:Muscle, Smooth / Q000294:innervation / Q000378:metabolism / Q000502:physiology*; D009474:Neurons / Q000378:metabolism; D018377:Neurotransmitter Agents / Q000378:metabolism*; D009569:Nitric Oxide / Q000502:physiology; D051381:Rats; D012018:Reflex / Q000502:physiology; D013270:Stomach / Q000294:innervation / Q000502:physiology*; D014660:Vasoactive Intestinal Peptide / Q000502:physiology
D018377:Neurotransmitter Agents; D009569:Nitric Oxide; D014660:Vasoactive Intestinal Peptide; D000255:Adenosine Triphosphate