Visceral Afferent Neurons: Role in Gastric Mucosal Protection.

Role of afferent sensory neurones in gastric injury/protection.

The role of afferent sensory neurones in gastric mucosal protection is discussed. The principal effects of substance P and capsaicin on gastric motility and mucosal blood flow are taken in correlation with gastric mucosal injury. It seems likely that the protective effect of sensory neuropeptides is dependent on gastric mucosal blood flow and is mediated through the nitric oxide-generating syst...

Gastroprotective and vasodilatory effects of epidermal growth factor: the role of sensory afferent neurons.

Epidermal growth factor (EGF) has been shown to exert gastric hyperemic and gastroprotective effects via capsaicin-sensitive afferent neurons, including the release of calcitonin gene-related peptide (CGRP). We examined the protective and vasodilatory effects of EGF on the gastric mucosa and its interaction with sensory nerves, CGRP, and nitric oxide (NO) in anesthetized rats. Intragastric EGF ...

Role of transient receptor potential A1 in gastric nociception.

Afferent fibers innervating the gastrointestinal tract have major roles in consciously evoked sensations including pain. However, little is known about the molecules involved in mechanonociception from the upper gastrointestinal tract. We recently reported that activation of extracellular signal-regulated kinase 1/2 (ERK1/2), a member of the mitogen-activated protein kinase cascade in primary a...

The Role of Capsaicin-Sensitive Afferent Nerves in Gastric Mucosal Protection Initiated Centrally or Peripherally under Experimental Conditions

Neural aspects of prostaglandin involvement in gastric mucosal defense.

In rats, central vagal stimulation by thyrotropin-releasing hormone protects against ethanol-induced gastric damage by muscarinic release of prostaglandins. In contrast, gastroprotection following capsaicin-induced stimulation of afferent neurons is prostaglandin-independent. Capsaicin-evoked protection is abolished by blockade of calcitonin gene-related peptide (CGRP) receptors and inhibition ...