A member of the cathelicidin family of antimicrobial peptides is produced in the upper airway of the chinchilla and its mRNA expression is altered by common viral and bacterial co-pathogens of otitis media.

A member of the cathelicidin family of antimicrobial peptides is produced in the upper airway of the chinchilla and its mRNA expression is altered by common viral and bacterial co-pathogens of otitis media. Research Abstract Details 

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A member of the cathelicidin family of antimicrobial peptides is produced in the upper airway of the chinchilla and its mRNA expression is altered by common viral and bacterial co-pathogens of otitis media. Abstract Text:

Glen McGillivary,William C Ray,Charles L Bevins,Robert S Munson,Lauren O Bakaletz,

Cationic antimicrobial peptides (AMPs), a component of the innate immune system, play a major role in defense of mucosal surfaces against a wide spectrum of microorganisms such as viral and bacterial co-pathogens of the polymicrobial disease otitis media (OM). To further understand the role of AMPs in OM, we cloned a cDNA encoding a cathelicidin homolog (cCRAMP) from upper respiratory tract (URT) mucosae of the chinchilla, the predominant host used to model experimental OM. Recombinant cCRAMP exhibited alpha-helical secondary structure and killed the three main bacterial pathogens of OM. In situ hybridization showed cCRAMP mRNA production in epithelium of the chinchilla Eustachian tube and RT-PCR was used to amplify cCRAMP mRNA from several other tissues of the chinchilla URT. Quantitative RT-PCR analysis of chinchilla middle ear epithelial cells (CMEEs) incubated with either viral (influenza A virus, adenovirus, or RSV) or bacterial (nontypeable H. influenzae, M. catarrhalis, or S. pneumoniae) pathogens associated with OM demonstrated distinct microbe-specific patterns of altered expression. Collectively, these data showed that viruses and bacteria modulate AMP messages in the URT, which likely contributes to the disease course of OM.

A member of the cathelicidin family of antimicrobial peptides is produced in the upper airway of the chinchilla and its mRNA expression is altered by common viral and bacterial co-pathogens of otitis media. Publishing Authors By Initials

G McGillivary,WC Ray,CL Bevins,RS Munson,LO Bakaletz,

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A member of the cathelicidin family of antimicrobial peptides is produced in the upper airway of the chinchilla and its mRNA expression is altered by common viral and bacterial co-pathogens of otitis media. Journal Published:

PUBLICATION TYPE: Research Support, N.I.H., Extr

Journal: Molecular immunology

VOLUME: 44

Page Numbers: 2446-58

Journal Abbreviation: Mol. Immunol.

ISSN: 0161-5890

DAY: 20

MONTH: 11

YEAR: 2006

A member of the cathelicidin family of antimicrobial peptides is produced in the upper airway of the chinchilla and its mRNA expression is altered by common viral and bacterial co-pathogens of otitis media. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 7905289

A member of the cathelicidin family of antimicrobial peptides is produced in the upper airway of the chinchilla and its mRNA expression is altered by common viral and bacterial co-pathogens of otitis media. Keywords Mesh Terms:

KEYWORDS: Viruses

MESH TERMS: metabolism

Chemical & Substance for Abstract: A member of the cathelicidin family of antimicrobial peptides is produced in the upper airway of the chinchilla and its mRNA expression is altered by common viral and bacterial co-pathogens of otitis media. Information

Substance Name: CAP18 lipopolysaccharide-binding protein

Registry Number: 143108-26-3

Grant and Affiliation Information for A member of the cathelicidin family of antimicrobial peptides is produced in the upper airway of the chinchilla and its mRNA expression is altered by common viral and bacterial co-pathogens of otitis media.

AFFILIATION: Columbus Children's Research Institute, Center for Microbial Pathogenesis and The Ohio State University College of Medicine & Public Health, 700 Children's Drive, Rm. W591, Columbus, OH 43205, USA.

Country: England

AGENCY: United States NIDCD

GRANT: R01 DC005847-04

ACRONYM: DC

MEDLINETA: Mol Immunol

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ACCESSION NUMBER: DQ097506

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