Evidence map›Paper›PMID 19257882›Full record

ArticleBMC plant biology2009

Characterization of PR-10 genes from eight Betula species and detection of Bet v 1 isoforms in birch pollen.

Martijn F Schenk, Jan H G Cordewener, Antoine H P America, Wendy P C Van't Westende, Marinus J M Smulders, Luud J W J Gilissen

Open access · goldAbstract read
In one paragraph

Article in BMC plant biology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
2.0field-weighted citation impact, top 14% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

19 citing papers in PubMed, 60 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Martijn F SchenkPlant Research International, Wageningen UR, Wageningen, the Netherlands. martijn.schenk@wur.nl
Jan H G Cordewener
Antoine H P America
Wendy P C Van't Westende
Marinus J M Smulders
Luud J W J Gilissen

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundBet v 1 is an important cause of hay fever in northern Europe. Bet v 1 isoforms from the European white birch (Betula pendula) have been investigated extensively, but the allergenic potency of other birch species is unknown. The presence of Bet v 1 and closely related PR-10 genes in the genome was established by amplification and sequencing of alleles from eight birch species that represent the four subgenera within the genus Betula. Q-TOF LC-MSE was applied to identify which PR-10/Bet v 1 genes are actually expressed in pollen and to determine the relative abundances of individual isoforms in the pollen proteome.

resultsAll examined birch species contained several PR-10 genes. In total, 134 unique sequences were recovered. Sequences were attributed to different genes or pseudogenes that were, in turn, ordered into seven subfamilies. Five subfamilies were common to all birch species. Genes of two subfamilies were expressed in pollen, while each birch species expressed a mixture of isoforms with at least four different isoforms. Isoforms that were similar to isoforms with a high IgE-reactivity (Bet v 1a = PR-10.01A01) were abundant in all species except B. lenta, while the hypoallergenic isoform Bet v 1d (= PR-10.01B01) was only found in B. pendula and its closest relatives.

conclusionQ-TOF LC-MSE allows efficient screening of Bet v 1 isoforms by determining the presence and relative abundance of these isoforms in pollen. B. pendula contains a Bet v 1-mixture in which isoforms with a high and low IgE-reactivity are both abundant. With the possible exception of B. lenta, isoforms identical or very similar to those with a high IgE-reactivity were found in the pollen proteome of all examined birch species. Consequently, these species are also predicted to be allergenic with regard to Bet v 1 related allergies.

Indexed as

AllergensAmino Acid SequenceAntigens, PlantBetulaCloning, MolecularDNA, PlantGenes, PlantGenomicsImmunoglobulin EMolecular Sequence DataMultigene FamilyPhylogenyPlant ProteinsPollenProtein IsoformsProteomicsAllergensAntigens, PlantBet v 1 allergen, BetulaDNA, PlantImmunoglobulin EPlant ProteinsProtein Isoforms

Identifiers

PMID19257882
PMCPMC2671506
OpenAlexW1972231576

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.