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Brainstem mechanisms of amylin-induced anorexia
2010, Physiology and BehaviorCitation Excerpt :Furthermore, a large number of projections from the AP and NTS to the LPB are noradrenergic [67] or serotoninergic [68]. Interestingly, about 20% of AP noradrenergic neurons contain also 5-HT, and about 40% of these show projections to the parabrachial nucleus [69]. Our recent immunohistochemical studies indicate that neurons of these phenotypes are specifically activated by amylin.
Activation of α <inf>2</inf>-adrenergic receptors into the lateral parabrachial nucleus enhances NaCl intake in rats
2004, NeuroscienceCitation Excerpt :Therefore, the enhancement of 1.8% NaCl intake during FURO+CAP treatment did not result from further unloading of volume receptors. The LPBN receives many fibers from AP/mNTS (Norgren, 1981; Shapiro and Miselis, 1985) and serotonergic, adrenergic and noradrenergic neurons are present in the projection from AP/NTS to the LPBN (Lança and van der Kooy, 1985; Miceli et al., 1987; Herbert and Flugge, 1995; Talley et al., 1996). It is possible that injections of moxonidine into the LPBN, perhaps interacting with 5-HT or CCK, acts by removing inhibitory signals from cardiovascular receptors running through the AP/mNTS, thus reinforcing the effects of mild hypotension on the circuits subserving sodium intake as already suggested for the blockade of the LPBN serotonergic and CCKergic mechanisms (Menani et al., 1996, 2000; Menani and Johnson, 1998).
Peripheral secretin-induced Fos expression in the rat brain is largely vagal dependent
2004, NeuroscienceCitation Excerpt :The observation that Fos expression in these nuclei, except the AP, was abolished or strongly diminished by vagotomy supports this view. Moreover, the significant Fos expression in the AP, but not the NTS, induced by secretin after vagotomy suggests that NTS activation by secretin is not mediated through the known AP projections to the NTS (Cunningham et al., 1994; Miceli et al., 1987; Shapiro and Miselis, 1985; van der Kooy and Koda, 1983). The high level of interconnectivity between the PBel, LC and CeA has been ascribed to augment the integrative processing of visceral sensory inputs and the relay of information in several autonomic regulatory mechanisms that elicit visceral reflex (Curtis et al., 2002).
The parabrachial nucleus and conditioned taste aversion
1999, Brain Research Bulletin