PMID- 24941918 OWN - NLM STAT- MEDLINE DCOM- 20141103 LR - 20191210 IS - 1423-0097 (Electronic) IS - 1018-2438 (Linking) VI - 164 IP - 2 DP - 2014 TI - Pomegranate ( Punica granatum L.) expresses several nsLTP isoforms characterized by different immunoglobulin E-binding properties. PG - 112-21 LID - 10.1159/000362761 [doi] AB - BACKGROUND: Pomegranate allergy is associated with sensitization to non-specific lipid transfer proteins (nsLTPs). Our aim was to identify and characterize the non-specific nsLTPs expressed in pomegranate at the molecular level and to study their allergenic properties in terms of immunoglobulin E (IgE)-binding and cross-reactivity with peach nsLTP (Pru p 3). METHODS: A non-equilibrium two-dimensional (2-D) electrophoretic approach based on acid-urea PAGE and sodium dodecyl sulfate PAGE was set up to separate pomegranate nsLTPs. Their immunoreactivity was tested by immunoblotting carried out with anti-Pru p 3 polyclonal antibodies and sera from pomegranate-allergic patients. For final identification, pomegranate nsLTPs were purified by chromatography and subjected to trypsin digestion and mass spectrometry (MS) analysis. For this purpose, the sequences obtained by cDNA cloning of three pomegranate nsLTPs were integrated in the database that was subsequently searched for MS data interpretation. RESULTS: Four nsLTPs were identified by 2-D immunoblotting. The detected proteins showed different IgE-binding capacity and partial cross-reactivity with Pru p 3. cDNA cloning and MS analyses led to the identification of three nsLTP isoforms with 66-68% amino acid sequence identity named Pun g 1.0101, Pun g 1.0201 and Pun g 1.0301. CONCLUSIONS: By 2-D electrophoresis, we could separate different nsLTP isoforms possessing different IgE-binding properties, which might reflect peculiar allergenic potencies. The contribution of Pru p 3 to prime sensitization is not central as in other plant nsLTPs. CI - (c) 2014 S. Karger AG, Basel. FAU - Bolla, Michela AU - Bolla M AD - Department of Biotechnology, University of Verona, Verona, Italy. FAU - Zenoni, Sara AU - Zenoni S FAU - Scheurer, Stephan AU - Scheurer S FAU - Vieths, Stefan AU - Vieths S FAU - San Miguel Moncin, Maria Del Mar AU - San Miguel Moncin Mdel M FAU - Olivieri, Mario AU - Olivieri M FAU - Antico, Andrea AU - Antico A FAU - Ferrer, Marta AU - Ferrer M FAU - Berroa, Felicia AU - Berroa F FAU - Enrique, Ernesto AU - Enrique E FAU - Avesani, Linda AU - Avesani L FAU - Marsano, Francesco AU - Marsano F FAU - Zoccatelli, Gianni AU - Zoccatelli G LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140617 PL - Switzerland TA - Int Arch Allergy Immunol JT - International archives of allergy and immunology JID - 9211652 RN - 0 (Allergens) RN - 0 (Antigens, Plant) RN - 0 (Carrier Proteins) RN - 0 (DNA, Complementary) RN - 0 (Plant Proteins) RN - 0 (Protein Isoforms) RN - 0 (sterol carrier proteins) RN - 37341-29-0 (Immunoglobulin E) SB - IM CIN - Int Arch Allergy Immunol. 2014;164(3):169-70. PMID: 25011525 MH - Adult MH - Allergens/genetics/immunology MH - Amino Acid Sequence MH - Antigens, Plant/immunology MH - Carrier Proteins/*genetics/*immunology MH - Cross Reactions/immunology MH - DNA, Complementary/genetics MH - Female MH - Food Hypersensitivity/genetics/immunology MH - Humans MH - Immunoglobulin E/*immunology MH - Lythraceae/genetics/*immunology MH - Middle Aged MH - Molecular Sequence Data MH - Plant Proteins/genetics/immunology MH - Protein Isoforms/*genetics/*immunology MH - Prunus/genetics/immunology MH - Sequence Alignment MH - Young Adult EDAT- 2014/06/20 06:00 MHDA- 2014/11/05 06:00 CRDT- 2014/06/20 06:00 PHST- 2013/11/08 00:00 [received] PHST- 2014/04/09 00:00 [accepted] PHST- 2014/06/20 06:00 [entrez] PHST- 2014/06/20 06:00 [pubmed] PHST- 2014/11/05 06:00 [medline] AID - 000362761 [pii] AID - 10.1159/000362761 [doi] PST - ppublish SO - Int Arch Allergy Immunol. 2014;164(2):112-21. doi: 10.1159/000362761. Epub 2014 Jun 17.