Claudia Traidl-Hoffmann, MDa. , Anna Kasche, MDa

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Presentation transcript:

Lipid mediators from pollen act as chemoattractants and activators of polymorphonuclear granulocytes Claudia Traidl-Hoffmann, MDa*, Anna Kasche, MDa*, Thilo Jakob, MDa, Michael Huger, a, Sabine Plötz, MDa, Ivo Feussner, PhDc, Johannes Ring, MD, PhDb, Heidrun Behrendt, MDa Journal of Allergy and Clinical Immunology Volume 109, Issue 5, Pages 831-838 (May 2002) DOI: 10.1067/mai.2002.124655 Copyright © 2002 Mosby, Inc. Terms and Conditions

Fig. 1 Analysis of polyenoic fatty acid-derived oxylipin formation in pollen lipid extracts. Lipids were extracted, and free oxylipins were isolated by means of RP-HPLC. The regioisomers of hydroxy fatty acids were separated by means of straight-phase HPLC, and the enantiomers were analyzed by means of chiral-phase HPLC. The estimated ratio of the stereoisomers (S/R ratio) of HODEs and HOTEs are shown in the insets: A, birch; B, grass. Journal of Allergy and Clinical Immunology 2002 109, 831-838DOI: (10.1067/mai.2002.124655) Copyright © 2002 Mosby, Inc. Terms and Conditions

Fig. 2 Migratory response of PMN to APEs, lipid mediators from pollen, and LTB4. A, Dose-dependent migration of PMNs to APEs from birch and grass pollen in comparison with migration induced by LTB4. Data are presented as pooled migration indices from 3 donors with grass allergy, 9 donors with birch allergy, and 11 nonallergic donors (mean ± SEM). B, Influence of the LTB4 receptor antagonist LY293111 on PMN migration. For APEs, one representative experiment of 6 (3 allergic and 3 nonallergic donors) by using PMNs from one allergic donor is shown (mean and range of duplicates). For LTB4 and IL-8, one representative experiment of 3 (3 allergic donors) is shown. C and D, PMN migration to lipid extracts of pollen. The mean ± SEM of pooled data from 9 donors (3 nonallergic donors, 3 donors with birch allergy, and 3 donors with grass allergy) is shown. Journal of Allergy and Clinical Immunology 2002 109, 831-838DOI: (10.1067/mai.2002.124655) Copyright © 2002 Mosby, Inc. Terms and Conditions

Fig. 3 Intracellular calcium flux induced in PMNs by pollen extracts and lipid mediators. A, LTB4 (3.9 × 10−8 mol/L). B and C, Aqueous extracts (AE) from grass pollen and birch pollen, respectively. F through I, Calcium mobilization in PMNs by lipid extracts from pollen: HIP extracts from birch pollen (F); RP-phase from birch pollen (G); HIP extracts from grass pollen (H); and RP-phase from grass pollen (I) . For cross-sensitization experiments, PMNs were first stimulated with APEs of pollen, followed by LTB4 (B and C ) or vice versa (D and E ). Shown is 1 representative experiment (donor with grass allergy) of 6 performed with PMNs from different donors: 2 from donors with birch allergy, 2 from donors with grass allergy, and 2 from nonallergic donors. Journal of Allergy and Clinical Immunology 2002 109, 831-838DOI: (10.1067/mai.2002.124655) Copyright © 2002 Mosby, Inc. Terms and Conditions

Fig. 4 Upregulation of CD11b on PMNs by APEs and lipid mediators from pollen. A-F, Histograms of CD11b expression 1 hour after stimulation with 3.9 × 10−9 mol/L LTB4 (A) , APE 34 mg of grass pollen/mL (B) , APE 34 mg of birch pollen/mL (C) , 50 μg/mL rPhl p 5 (D) , HIP birch pollen extracts (E) , and RP-phase from birch pollen (F) . Numbers indicate net mean fluorescence intensity: left, unstimulated control; right, stimulated probe. Dotted lines indicate unstimulated control, and solid lines indicate stimulated probes. The experiment stands for 6 similar experiments performed from PMNs of 2 donors with grass allergy, 2 donors with birch allergy, and 2 nonallergic donors. Journal of Allergy and Clinical Immunology 2002 109, 831-838DOI: (10.1067/mai.2002.124655) Copyright © 2002 Mosby, Inc. Terms and Conditions