Dose-dependent effects of ethanol and E. coli on gut permeability and cytokine production.
J Surg Res
; 157(2): 187-92, 2009 Dec.
Article
en En
| MEDLINE
| ID: mdl-19482301
ABSTRACT
INTRODUCTION:
The gut may prime inflammatory responses following shock/trauma insults. Ethanol (EtOH) use is common in trauma patients and may impair intestinal barrier function. We compared varying concentrations of EtOH on proinflammatory cytokine production of Caco2 cell monolayers and the resultant changes in barrier function. We hypothesized that even low concentrations of EtOH would cause significant cytokine release and barrier dysfunction in vitro. MATERIALS ANDMETHODS:
Confluent Caco2 cell monolayers were grown in a two-chamber culture system and exposed to varying concentrations of EtOH (0.1%, 0.5%, 1.0%, 1.5%, and 2.0%) with/without Escherichia coli C-25 (EC). Supernatants were collected and TNF and IL6 quantified by ELISA (pg/mL). Monolayer integrity was assessed by apoptosis and permeability measurements.RESULTS:
Caco2 production of TNF-alpha increased in a dose-dependent manner when incubated with increasing concentrations of EtoH. A synergistic effect was seen when E. coli was added to the apical chamber. A similar result was seen with the production of IL-6. A dose-dependent effect was also noted with EtOH with or without E. coli on apoptosis and permeability measurements.CONCLUSION:
In addition to alterations in gut permeability, increasing concentrations of ethanol have a synergistic effect with E. coli on Caco2 production of proinflammatory cytokines TNF and IL-6. The creation of a proinflammatory cytokine milieu with an altered barrier integrity may be a mechanism by which ethanol may increase septic complications in the injured patient.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Contexto en salud:
3_ND
Problema de salud:
3_neglected_diseases
/
3_zoonosis
Asunto principal:
Permeabilidad de la Membrana Celular
/
Depresores del Sistema Nervioso Central
/
Citocinas
/
Etanol
/
Escherichia coli
/
Mucosa Intestinal
Límite:
Humans
Idioma:
En
Revista:
J Surg Res
Año:
2009
Tipo del documento:
Article
País de afiliación:
Estados Unidos