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Published ahead of print on April 27, 2006, doi:10.1165/rcmb.2005-0451OC

Am. J. Respir. Cell Mol. Biol., Volume 35, Number 3, September 2006, 357-365

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Submitted on December 7, 2005
Revised on April 27, 2006

Gob-5 Contributes to Goblet Cell Hyperplasia and Modulates Pulmonary Tissue Inflammation

Andrew J Long1*, Joseph P Sypek1, Roger Askew1, Susan C Fish1, Lawrence E Mason1, Cara M. M. Williams1, and Samuel J Goldman1

1 Respiratory Disease, Wyeth Research, Cambridge, MA, USA

* To whom correspondence should be addressed. E-mail: along{at}wyeth.com.

Gob-5 is a member of the calcium activated chloride channel family and has been associated with allergic response in mouse models of pulmonary inflammation. Gene expression of Gob-5 has been shown to be induced in allergic airways and has been strongly associated with mucin gene regulation and goblet cell hyperplasia. We investigated the physiologic role of Gob-5 in murine models of pulmonary inflammation using mice deficient in Gob-5. After sensitization and aerosol challenge with ovalbumin (OVA), Gob-5 knockout mice exhibit significantly increased bronchoalveolar lavage (BAL) inflammation as compared to wild type controls. The augmented inflammation in BAL consisted of predominantly neutrophils. Examination of perivascular inflammation revealed that tissue inflammation was decreased in OVA challenged Gob-5 -/- mice. OVA challenged Gob-5 knockout mice also had decreased goblet cell hyperplasia as well as decreased mucus production. These mice also had decreased airway hypersensitivity after cholinergic provocation with methacholine. Gob-5 knockout mice were also challenged via intranasal LPS, a TLR-4 agonist. Gob-5 -/- mice responded with increased neutrophilic BAL inflammation and decreased perivascular tissue inflammation as compared with wild type controls. There was little effect on goblet cell hyperplasia and mucus production after LPS challenge. These observations reinforce findings that associate Gob-5 with goblet cell hyperplasia and mucus production in the allergic immune response but also implicate Gob-5 in the regulation of tissue inflammation in the innate immune response.




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