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2015 ; 10
(9
): e0136549
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English Wikipedia
Serum IgE Induced Airway Smooth Muscle Cell Remodeling Is Independent of
Allergens and Is Prevented by Omalizumab
#MMPMID26332463
Roth M
; Zhao F
; Zhong J
; Lardinois D
; Tamm M
PLoS One
2015[]; 10
(9
): e0136549
PMID26332463
show ga
BACKGROUND: Airway wall remodeling in allergic asthma is reduced after treatment
with humanized anti-IgE-antibodies. We reported earlier that purified IgE,
without the presence of allergens, is sufficient to induce airway wall remodeling
due to airway smooth muscle cell (ASMC) activity deposing extracellular matrix.
OBJECTIVE: We postulate that IgE contained in serum of allergic asthma patients,
in the absence of allergens, stimulates ASMC remodeling activities and can be
prevented by anti-IgE antibodies. METHODS: Isolated human ASMC were exposed to
serum obtained from: (i) healthy controls, or patients with (ii) allergic asthma,
(iii) non-allergic asthma, and (iv) atopic non-asthma patients. Proliferation and
the deposition of collagens and fibronectin were determined after 3 and 5 days.
RESULTS: Serum from patients with allergies significantly stimulated: (i) ASMC
proliferation, (ii) deposition of collagen type-I (48 hours) and (iii) of
fibronectin (24 hours). One hour pre-incubation with Omalizumab prevented these
three effects of allergic serum, but had no significant effect on serum from
healthy donors or non-allergic asthma patients. Interestingly, the addition of
allergens did not further increase any of the IgE effects. CONCLUSION AND
CLINICAL RELEVANCE: Our data provides experimental evidence that the beneficial
effect of Omalizumab on airway wall remodeling and improved lung function may be
due to its direct action on IgE bound ASMC.