In addition, it is interesting selleck chemicals Ganetespib to know that the up regulation of PlGF is identified in an ovalbumin induced asthma mice model wherein PlGF promotes neutrophilic chemota is. Therefore, the positive feedback loop between NE and PlGF in the pathogenesis of COPD warrants further investigation. Because of frequently ignored early symptoms and irreversible pulmonary damage, COPD remains a major cause of death worldwide. As a chronic disease with insidious pathogenesis, COPD is difficult to diagnose early. Useful diagnostic markers will help in the early diagnosis, early treatment, and reduction of mortality and morbidity. A previous report indicates that the NE digested product, A Val360, may be a marker for COPD. However, endogenous elastin fragments can disturb the utility of A Val360 for predicting COPD.
The present study demonstrates that PlGF, which physiologically appears only in the embryonic stage, may be a suitable candidate as a diagnostic marker of early COPD. Based on the IHC results and BAL data in a previous study, COPD patients secrete and e press more PlGF compared to non COPD controls. Other than COPD, the up regulation of PlGF is also associated with higher risk of several human diseases, including age related macular degradation, sickle cell disease, and most kinds of tumors. As PlGF e pression is barely detectable in healthy adults, further investigation regarding the association between PlGF and COPD may therefore support PlGF as a candidate marker for early COPD.
A previous study indicates that mouse PlGF activates p38 MAPK and JNK signaling pathway in mouse alveolar epithelial cells, and that MLE 15 and human PlGF activates the p38 MAPK and JNK signaling pathway in BEAS 2B. In the present study, PlGF promotes only JNK and PKC in AEC II cell. The difference in cell systems may e plain why PlGF acts through different down stream signaling pathways. However, the JNK, p38 MAPK, and PKC signaling pathways should all be considered as potential therapeutic targets aside from PlGF for COPD therapy. Conclusions Using human and mouse LE cells as well as an in vivo model, this study demonstrates that NE challenge stimulates PlGF e pression and secretion, and that PlGF promotes LE cell apoptosis Drug_discovery via the JNK and PKC signaling pathways. Thus, PlGF and the downstream JNK PKC signaling pathways participate in the pathogenesis of CS related COPD and should be considered potential therapeutic targets for COPD therapy.
Background The DEP domain is a globular EPZ-5676 domain containing ap pro imately 90 amino acids, which was first discovered in 3 proteins Drosophila disheveled, Caenorhabditis elegans EGL 10, and mammalian Pleckstrin. hence the term, DEP. The DEP domain was observed to play a function in mediating membrane localization and regulating a broad range of cellular functions, from the determin ation of cell polarity to highly specialized signals in pho toreceptors of the retina.