Genotyping of four HapMap derived tagging SNPs in the MMP-9 gene was performed using MALDI-TOF MS in three cross sectional study populations of German children (age 9-11; N = 4,264) phenotyped for asthma and atopic diseases according to ISAAC standard procedures.
Functionally, MMP-9-deficient mice had more acute allergic inflammation than wild-type mice, suggesting that MMP-9 was protective against experimentally induced asthma.
Expression levels of ORMDL3, phosphorylated (p)‑ERK and MMP‑9 were significantly greater in the asthma‑model group; however, in the group pretreated with budesonide their expression was reduced.
AMs of asthma with a fast FEV<sub>1</sub> decline released a higher level of MMP-9 (8.52 ± 3.53 pg/mL, <i>p</i> < 0.05) than those of a slow FEV<sub>1</sub> decline (0.99 ± 0.20 pg/mL).
A water extract of Samchulkunbi-tang attenuates airway inflammation by inhibiting inos and MMP-9 activities in an ovalbumin-induced murine asthma model.
MMP-9 (gelatinase B) is recognized in chronic obstructive pulmonary disease (COPD) and now asthma as playing a central role in matrix degradation in injury, as well as contributing to the remodeling process.
MMP-9 -1562C>T and 836G>A (Arg279Gln) were not associated with asthma (p> or =0.15) or asthma severity (p> or =0.13), and TIMP-1 434T>C (Phe124Phe) was not associated with asthma in women (p = 0.094) or men (p = 0.207).