Group 2 innate lymphoid cells (ILC2s) mediate rapid immune responses against microbial infection by secreting large amounts of T helper type 2 (Th2) cytokines. Exposure to environmental stimuli including parasites, viruses, bacteria and protease allergens, damages epithelial cells, resulting in the secretion of thymic stromal lymphopoietin (TSLP), interleukin (IL)-25 and IL-33. These cytokines ...

purpose: in the present work, clinical symptoms, serum immunoglobuline alteration and eosinophil count were investigated in the patients infected with giardia lamblia. materials and methods: in this regard, 50 persons infected with giardia and 50 healthy individuals were selected as the study and control groups respectively in tehran. sera of the groups were tested for igg, ige, iga levels and...

In experiments using an immunofluorescent method to localize human eosinophil granule major basic protein (MBP) in cells and tissues, a small number of cells stained for MBP that subsequently could not be identified as eosinophils. Because the Charcot-Leyden crystal protein, another eosinophil protein, was recently identified in basophils, we tested whether MBP might also be a constituent of bl...

IL-5 plays a pivotal role in growth and differentiation of eosinophils. The signal transduction mechanism of IL-5Ralpha is largely unknown. We have demonstrated that IL-5 induces tyrosine phosphorylation of IL-5Ralpha in eosinophils. To identify IL-5Ralpha-associated tyrosine kinases, we have examined the expression of Src family tyrosine kinases in eosinophils. Among the Src family members, Ly...

Eosinophil accumulation is a defining feature of the immune response to parasitic worm infection. Tissue-resident cells, such as epithelial cells, are thought to initiate eosinophil recruitment. However, direct recognition of worms by eosinophils has not been explored as a mechanism for amplifying eosinophil accumulation. Here, we report that eosinophils rapidly migrate toward diverse nematode ...

the pathogenetic mechanism of nasal polyps remains unknown, although allergy has been cited as an important factor in the etiology of nasal polyposis. currently there is no definite histological criterion for differentiation of allergic from inflammatory nasal polyp. however, in a few studies, tissue eosinophil count has been used for this. this study aimed to find out the agreement rate of ski...

Peripheral blood and tissue eosinophilia is a prominent feature in allergic diseases and helminth infections. In cancer patients, tumor-associated tissue eosinophilia is frequently observed. Tumor-associated tissue eosinophilia can be associated with a favorable prognosis, notably in colorectal carcinoma. However, underlying mechanisms of eosinophil contribution to antitumor responses are poorl...

The aim of the present study was to explore the roles of OX40/OX40 ligand (OX40L) signaling and OX40+ T cells in ovalbumin (OVA)‑induced mouse asthma model. Asthma was induced by OVA exposure and subsequent co‑treatment with OX40L protein, neutralizing anti‑OX40L blocking antibody, OX40+ T cells or PBS. The protein expression levels of interleukin (IL)‑4, IL‑6, IL‑13, IL‑17, tumor necrosis fact...

Interleukin-9 (IL-9) has been implicated in the pathogenesis of allergic disorders. To examine the interaction between IL-9 and eosinophils, we evaluated mature peripheral blood eosinophils for their expression of the specific alpha-subunit of the IL-9 receptor (IL-9R-alpha). The expression of IL-9R-alpha by human eosinophils was detected at the messenger RNA (mRNA) and protein levels by revers...