Journal: bioRxiv
Article Title: Identification of Alpha-Gal conjugated Lipids in Saliva of Lone-Star Tick ( Amblyomma americanum )
doi: 10.1101/2024.02.22.581476
Figure Lengend Snippet: Flow cytometric analysis of human basophil activation by salivary total proteins of silenced tissues, lipids, and protein fractions of tick Amblyomma Americanum (Am. Americanum) saliva and salivary glands. Basophils from a healthy, non-allergic control subject, depleted of IgE, were overnight primed with plasma from an individual with α-gal syndrome (α-gal sIgE = 53.7 IU/ml, total IgE = 74.8 IU/ml). These sensitized cells were then exposed to various stimuli for 30 minutes, including (A) RPMI media, (B) crosslinking anti-IgE antibody (used as a positive control), (C) protein fraction left after extraction of lipid from partially blood feed Am. americanum . tick salivary gland, (D) lipid isolated from partially blood-feed Am americanum tick salivary glands, (E) protein fraction left after extraction of lipid from saliva, (F) lipid isolated from partially blood-feed Am americanum . tick saliva,. Flow cytometry was utilized to assess CD63 expression on lineage-1 - HLA-DR - CD123 + CD203c + basophils. Results are representative of three biological replicates.
Article Snippet: Stimulation reactions were halted with 20 mM EDTA, and PBMCs were stained with fluorescently labeled antibodies targeting CD123 (from BioLegend in San Diego, CA, USA), human lineage 1 markers (CD3, CD14, CD16, CD19, CD20, CD56, from BD Biosciences in San Jose, CA, USA), HLA-DR, CD63 (from eBiosciences ThermoFisher in Waltham, MA, USA), and CD203c (from IOTest Beckman Coulter in Marseille, France).
Techniques: Activation Assay, Positive Control, Extraction, Isolation, Flow Cytometry, Expressing