“In anesthetized, spontaneously breathing rats, intravenous infusion of bombesin or GRP significantly amplified the pulmonary chemoreflex responses to chemical stimulants such as capsaicin and ATP.”
“This sensitizing effect was further demonstrated in patch-clamp recording studies; the sensitivities of these neurons to both chemical capsaicin and ATP) and electrical stimuli were significantly enhanced by the presence of either bombesin or GRP.”