Proof of concept pilot study: prevalence of grass virus infection and the potential for effects on the allergenic potency of pollen.

Background: Wild plants harbour a variety of viruses and these have the potential to alter the composition of pollen. The potential consequences of virus infection of grasses on pollen-induced allergic disease are not known.

Methods: We have collected pollen from Dactylis glomerata (cocksfoot; a grass species implicated as a trigger of allergic rhino-conjunctivitis) from Wytham Wood, Oxfordshire UK.

Free secretory component from cystic fibrosis sputa displays the cystic fibrosis glycosylation phenotype.

Secretory IgA contributes to humoral defense mechanisms against pathogens targeting mucosal surfaces, and secretory component (SC) fulfills multiple roles in this defense. The aims of this study were to quantify total SC and to analyze the form of free SC in sputa from normal subjects, subjects with asthma, and subjects with cystic fibrosis (CF). Significantly higher levels of SC were detected in CF compared with both other groups.

Growth factors in cystic fibrosis - when more is not enough.

In the airways of patients with cystic fibrosis, repeated cycles of infection and inflammation are responsible for bronchial wall thickening, a major determinant of loss of FEV(1) and progressive damage to the small and large airways. Proteolytic degradation of elastin, collagen and fibronectin fibrils in the tissue matrix leads to the loss of normal tissue architecture and the development of bronchiectasis, the most commonly observed morphological change on high-resolution computed tomography examination. We have reviewed the evidence for increased expression of growth factors (TGF, HGF, FGF, EGF, VEGF) and activation of tissue repair processes in cystic fibrosis.