Tags

Type your tag names separated by a space and hit enter

5-HT 3 receptors mediate the time-dependent vagal afferent modulation of nociception during chronic food allergen-sensitized visceral hyperalgesia in rats.
Neurogastroenterol Motil 2009; 21(11):1222-e113NM

Abstract

Converging lines of evidence demonstrate a vagally mediated antinociceptive pathway in animals undergoing acute visceral insults, the contribution of this system to visceral pain following chronic noxious stimuli is unknown. 5-HT(3) receptor (5-HT(3)Rs) on spinal afferents are crucially involved in nociceptive processing, the role of 5-HT(3)Rs on vagal afferents is unclear. The aim of the present study was to determine the contribution of vagal afferents to visceral nociception in rats undergoing chronic luminal allergen stimulation and whether it involves vagal 5-HT(3)Rs. Sensitized rats received chicken egg albumin (EA, 1 mg mL(-1)) in drinking water for 2 weeks (day 1-14). Visceromotor response (VMR) to colorectal distension [colorectal distension (CRD), 60 mmHg] and the levels of mRNA encoding 5-HT(3)R (including 3A and 3B subunits) in the nodose ganglia (NG) were evaluated on day 2, 4, 8 and 15. Chronic EA challenge induced gradually increased visceral nociception, with a peak on day 15. Subdiaphragmatic vagotomy or functional deafferentation with capsaicin abolished this time-dependent manner, inducing hyperalgesia from day 2, lasting to day 15. Intraluminal infusion of a 5-HT(3)R antagonist (granisetron), whether alone or infused after local mucosa anaesthetic with 1% lidocaine, mimicked the effects of vagotomy. The mRNA levels for 5-HT(3B) or 5-HT(3A) subunit in the NG showed an opposite time-course to that of visceral pain, which increased from day 2, then decreased gradually to levels lower than those of controls. Our results demonstrate a time-dependent vagal afferent modulation of chronic allergen-sensitized visceral hyperalgesia, which may involve a 5-HT(3)R pathway.

Authors+Show Affiliations

Department of Gastroenterology, Shanghai Institute of Digestive Disease, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China. chenslmd@yahoo.com.cnNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19558425

Citation

Chen, S, et al. "5-HT 3 Receptors Mediate the Time-dependent Vagal Afferent Modulation of Nociception During Chronic Food Allergen-sensitized Visceral Hyperalgesia in Rats." Neurogastroenterology and Motility : the Official Journal of the European Gastrointestinal Motility Society, vol. 21, no. 11, 2009, pp. 1222-e113.
Chen S, Li J, Zhang L, et al. 5-HT 3 receptors mediate the time-dependent vagal afferent modulation of nociception during chronic food allergen-sensitized visceral hyperalgesia in rats. Neurogastroenterol Motil. 2009;21(11):1222-e113.
Chen, S., Li, J., Zhang, L., Dong, X., Gao, W., Mo, J., ... Li, Y. (2009). 5-HT 3 receptors mediate the time-dependent vagal afferent modulation of nociception during chronic food allergen-sensitized visceral hyperalgesia in rats. Neurogastroenterology and Motility : the Official Journal of the European Gastrointestinal Motility Society, 21(11), pp. 1222-e113. doi:10.1111/j.1365-2982.2009.01335.x.
Chen S, et al. 5-HT 3 Receptors Mediate the Time-dependent Vagal Afferent Modulation of Nociception During Chronic Food Allergen-sensitized Visceral Hyperalgesia in Rats. Neurogastroenterol Motil. 2009;21(11):1222-e113. PubMed PMID: 19558425.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - 5-HT 3 receptors mediate the time-dependent vagal afferent modulation of nociception during chronic food allergen-sensitized visceral hyperalgesia in rats. AU - Chen,S, AU - Li,J, AU - Zhang,L, AU - Dong,X, AU - Gao,W, AU - Mo,J, AU - Chen,H, AU - Xiao,S, AU - Li,Y, Y1 - 2009/05/26/ PY - 2009/6/30/entrez PY - 2009/6/30/pubmed PY - 2009/12/16/medline SP - 1222 EP - e113 JF - Neurogastroenterology and motility : the official journal of the European Gastrointestinal Motility Society JO - Neurogastroenterol. Motil. VL - 21 IS - 11 N2 - Converging lines of evidence demonstrate a vagally mediated antinociceptive pathway in animals undergoing acute visceral insults, the contribution of this system to visceral pain following chronic noxious stimuli is unknown. 5-HT(3) receptor (5-HT(3)Rs) on spinal afferents are crucially involved in nociceptive processing, the role of 5-HT(3)Rs on vagal afferents is unclear. The aim of the present study was to determine the contribution of vagal afferents to visceral nociception in rats undergoing chronic luminal allergen stimulation and whether it involves vagal 5-HT(3)Rs. Sensitized rats received chicken egg albumin (EA, 1 mg mL(-1)) in drinking water for 2 weeks (day 1-14). Visceromotor response (VMR) to colorectal distension [colorectal distension (CRD), 60 mmHg] and the levels of mRNA encoding 5-HT(3)R (including 3A and 3B subunits) in the nodose ganglia (NG) were evaluated on day 2, 4, 8 and 15. Chronic EA challenge induced gradually increased visceral nociception, with a peak on day 15. Subdiaphragmatic vagotomy or functional deafferentation with capsaicin abolished this time-dependent manner, inducing hyperalgesia from day 2, lasting to day 15. Intraluminal infusion of a 5-HT(3)R antagonist (granisetron), whether alone or infused after local mucosa anaesthetic with 1% lidocaine, mimicked the effects of vagotomy. The mRNA levels for 5-HT(3B) or 5-HT(3A) subunit in the NG showed an opposite time-course to that of visceral pain, which increased from day 2, then decreased gradually to levels lower than those of controls. Our results demonstrate a time-dependent vagal afferent modulation of chronic allergen-sensitized visceral hyperalgesia, which may involve a 5-HT(3)R pathway. SN - 1365-2982 UR - https://www.unboundmedicine.com/medline/citation/19558425/5_HT_3_receptors_mediate_the_time_dependent_vagal_afferent_modulation_of_nociception_during_chronic_food_allergen_sensitized_visceral_hyperalgesia_in_rats_ L2 - https://doi.org/10.1111/j.1365-2982.2009.01335.x DB - PRIME DP - Unbound Medicine ER -