Human ß-defensin-2 induction in nasal mucosa after administration of bacterial lysates.
Arch Med Res
; 42(3): 189-94, 2011 Apr.
Article
em En
| MEDLINE
| ID: mdl-21722813
ABSTRACT
BACKGROUND AND AIMS:
The airway epithelium produces antimicrobial peptides (AMPs) that prevent colonization of host tissues by a wide range of pathogens. Human ß-defensin 2 (hBD-2) is one of the most well-documented AMPs in humans. Several bacterial products can induce production of this peptide. Bacterial immunostimulants containing bacterial lysates have long been used in the treatment of respiratory infections, but their effects on hBD-2 release have not been investigated. We undertook this study to induce production of hBD-2 after stimulation of the nasal mucosa with bacterial lysates.METHODS:
A nasal lavage (NL) was performed in 12 healthy volunteers under basal conditions and after a nasal challenge with separate and subsequent stimuli with either bacterial lysates (20 million), cholecalciferol (400 IU), or sham-challenge with glycerol plus isotonic saline solution. Immunohistochemistry was performed in nasal biopsies 48 h after stimulation with bacterial lysates to identify the presence of hBD-2.RESULTS:
Increased levels of hBD-2 (4668.99 ± 2829.33 pg/mL) were measured with ELISA in NL fluids following bacterial challenge. However, hBD-2 concentrations were below the limit of detection in NL fluids at baseline and after the administration of cholecalciferol or the sham-challenge. Through immunohistochemistry, hBD-2 was predominantly localized to the epithelium.CONCLUSIONS:
hBD-2 can be induced in the nasal mucosa after administration of bacterial lysates. Stimulation of the innate immune system to produce hBD-2 could be used to prevent or even treat infections caused by respiratory pathogens.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Bactérias
/
Extratos Celulares
/
Beta-Defensinas
/
Mucosa Nasal
Limite:
Adolescent
/
Adult
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
Arch Med Res
Assunto da revista:
MEDICINA
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
México