What question did this study set out to answer?

This research aims to define the in vivo expression and function of IL-13 in the context of asthma and allergen exposure.

IL-13 expression at the sites of allergen challenge in patients with asthma

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Randomized trial examines IL-13 expression in allergen-challenged patients, suggesting its role in asthma inflammation.

This research aims to define the in vivo expression and function of IL-13 in the context of asthma and allergen exposure.
Used a segmental allergen challenge model to assess IL-13 expression in bronchoalveolar lavage (BAL) cells.
Compared IL-13 transcripts and protein levels in allergen-challenged and saline-challenged BAL samples.
Identified cellular sources of IL-13 mRNA in mononuclear cells from allergen-challenged BAL.
Significant enhancement of IL-13 transcripts and secreted proteins in allergen-challenged BAL compared to saline-challenged controls.
IL-13 expression was not detectable in BAL of normal subjects after ragweed allergen challenge.
The main source of increased IL-13 mRNA in allergen-challenged BAL was identified as mononuclear cells.

Huang et al. (1995) studied this question.

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