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Comparative genomic profiling of Dutch clinical Bordetella pertussis isolates using DNA microarrays: Identification of genes absent from epidemic strains

Identifieur interne : 002A00 ( Main/Exploration ); précédent : 002999; suivant : 002A01

Comparative genomic profiling of Dutch clinical Bordetella pertussis isolates using DNA microarrays: Identification of genes absent from epidemic strains

Auteurs : Audrey J. King [Pays-Bas] ; Tamara Van Gorkom [Pays-Bas] ; Jeroen La Pennings [Pays-Bas] ; Han Gj Van Der Heide [Pays-Bas] ; Qiushui He [Finlande] ; Dimitri Diavatopoulos [Australie] ; Kees Heuvelman [Pays-Bas] ; Marjolein Van Gent [Pays-Bas] ; Karin Van Leeuwen [Pays-Bas] ; Frits R. Mooi [Pays-Bas]

Source :

RBID : PMC:2481270

Descripteurs français

English descriptors

Abstract

Background

Whooping cough caused by Bordetella pertussis in humans, is re-emerging in many countries despite vaccination. Several studies have shown that significant shifts have occurred in the B. pertussis population resulting in antigenic divergence between vaccine strains and circulating strains and suggesting pathogen adaptation. In the Netherlands, the resurgence of pertussis is associated with the rise of B. pertussis strains with an altered promoter region for pertussis toxin (ptxP3).

Results

We used Multi-Locus Sequence Typing (MLST), Multiple-Locus Variable Number of Tandem Repeat Analysis (MLVA) and microarray-based comparative genomic hybridization (CGH) to characterize the ptxP3 strains associated with the Dutch epidemic. For CGH analysis, we developed an oligonucleotide (70-mers) microarray consisting of 3,581 oligonucleotides representing 94% of the gene repertoire of the B. pertussis strain Tohama I. Nine different MLST profiles and 38 different MLVA types were found in the period 1993 to 2004. Forty-three Dutch clinical isolates were analyzed with CGH, 98 genes were found to be absent in at least one of the B. pertussis strains tested, these genes were clustered in 8 distinct regions of difference.

Conclusion

The presented MLST, MLVA and CGH-analysis identified distinctive characteristics of ptxP3 B. pertussis strains -the most prominent of which was a genomic deletion removing about 23,000 bp. We propose a model for the emergence of ptxP3 strains.


Url:
DOI: 10.1186/1471-2164-9-311
PubMed: 18590534
PubMed Central: 2481270


Affiliations:


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Le document en format XML

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<nlm:aff id="I1">Laboratory for Infectious Diseases and Screening (LIS) Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands</nlm:aff>
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<term>Bordetella pertussis (génétique)</term>
<term>Bordetella pertussis (isolement et purification)</term>
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<term>ADN bactérien</term>
<term>Bordetella pertussis</term>
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<term>Bordetella pertussis</term>
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<term>Bordetella pertussis</term>
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<term>Oligonucleotide Array Sequence Analysis</term>
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<term>Coqueluche</term>
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<keywords scheme="MESH" qualifier="microbiology" xml:lang="en">
<term>Whooping Cough</term>
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<term>Coqueluche</term>
<term>Pays-Bas</term>
</keywords>
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<term>Alleles</term>
<term>Bacterial Typing Techniques</term>
<term>Cluster Analysis</term>
<term>Evolution, Molecular</term>
<term>Gene Expression Profiling</term>
<term>Gene Frequency</term>
<term>Genes, Bacterial</term>
<term>Genetic Heterogeneity</term>
<term>Genetic Variation</term>
<term>Humans</term>
<term>Models, Genetic</term>
<term>Nucleic Acid Hybridization</term>
<term>Point Mutation</term>
<term>Retrospective Studies</term>
<term>Sequence Analysis, DNA</term>
</keywords>
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<term>Allèles</term>
<term>Analyse de profil d'expression de gènes</term>
<term>Analyse de regroupements</term>
<term>Analyse de séquence d'ADN</term>
<term>Bordetella pertussis</term>
<term>Fréquence d'allèle</term>
<term>Gènes bactériens</term>
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<term>Hétérogénéité génétique</term>
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<front>
<div type="abstract" xml:lang="en">
<sec>
<title>Background</title>
<p>Whooping cough caused by
<italic>Bordetella pertussis </italic>
in humans, is re-emerging in many countries despite vaccination. Several studies have shown that significant shifts have occurred in the
<italic>B. pertussis </italic>
population resulting in antigenic divergence between vaccine strains and circulating strains and suggesting pathogen adaptation. In the Netherlands, the resurgence of pertussis is associated with the rise of
<italic>B. pertussis </italic>
strains with an altered promoter region for pertussis toxin (
<italic>ptxP3</italic>
).</p>
</sec>
<sec>
<title>Results</title>
<p>We used Multi-Locus Sequence Typing (MLST), Multiple-Locus Variable Number of Tandem Repeat Analysis (MLVA) and microarray-based comparative genomic hybridization (CGH) to characterize the
<italic>ptxP3 </italic>
strains associated with the Dutch epidemic. For CGH analysis, we developed an oligonucleotide (70-mers) microarray consisting of 3,581 oligonucleotides representing 94% of the gene repertoire of the
<italic>B. pertussis </italic>
strain Tohama I. Nine different MLST profiles and 38 different MLVA types were found in the period 1993 to 2004. Forty-three Dutch clinical isolates were analyzed with CGH, 98 genes were found to be absent in at least one of the
<italic>B. pertussis </italic>
strains tested, these genes were clustered in 8 distinct regions of difference.</p>
</sec>
<sec>
<title>Conclusion</title>
<p>The presented MLST, MLVA and CGH-analysis identified distinctive characteristics of
<italic>ptxP3 B. pertussis </italic>
strains -the most prominent of which was a genomic deletion removing about 23,000 bp. We propose a model for the emergence of
<italic>ptxP3 </italic>
strains.</p>
</sec>
</div>
</front>
<back>
<div1 type="bibliography">
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</back>
</TEI>
<affiliations>
<list>
<country>
<li>Australie</li>
<li>Finlande</li>
<li>Pays-Bas</li>
</country>
<region>
<li>Finlande occidentale</li>
<li>Victoria (État)</li>
</region>
<settlement>
<li>Melbourne</li>
<li>Turku</li>
</settlement>
<orgName>
<li>Université de Melbourne</li>
</orgName>
</list>
<tree>
<country name="Pays-Bas">
<noRegion>
<name sortKey="King, Audrey J" sort="King, Audrey J" uniqKey="King A" first="Audrey J" last="King">Audrey J. King</name>
</noRegion>
<name sortKey="Heuvelman, Kees" sort="Heuvelman, Kees" uniqKey="Heuvelman K" first="Kees" last="Heuvelman">Kees Heuvelman</name>
<name sortKey="Mooi, Frits R" sort="Mooi, Frits R" uniqKey="Mooi F" first="Frits R" last="Mooi">Frits R. Mooi</name>
<name sortKey="Pennings, Jeroen La" sort="Pennings, Jeroen La" uniqKey="Pennings J" first="Jeroen La" last="Pennings">Jeroen La Pennings</name>
<name sortKey="Van Der Heide, Han Gj" sort="Van Der Heide, Han Gj" uniqKey="Van Der Heide H" first="Han Gj" last="Van Der Heide">Han Gj Van Der Heide</name>
<name sortKey="Van Gent, Marjolein" sort="Van Gent, Marjolein" uniqKey="Van Gent M" first="Marjolein" last="Van Gent">Marjolein Van Gent</name>
<name sortKey="Van Gorkom, Tamara" sort="Van Gorkom, Tamara" uniqKey="Van Gorkom T" first="Tamara" last="Van Gorkom">Tamara Van Gorkom</name>
<name sortKey="Van Leeuwen, Karin" sort="Van Leeuwen, Karin" uniqKey="Van Leeuwen K" first="Karin" last="Van Leeuwen">Karin Van Leeuwen</name>
</country>
<country name="Finlande">
<region name="Finlande occidentale">
<name sortKey="He, Qiushui" sort="He, Qiushui" uniqKey="He Q" first="Qiushui" last="He">Qiushui He</name>
</region>
</country>
<country name="Australie">
<region name="Victoria (État)">
<name sortKey="Diavatopoulos, Dimitri" sort="Diavatopoulos, Dimitri" uniqKey="Diavatopoulos D" first="Dimitri" last="Diavatopoulos">Dimitri Diavatopoulos</name>
</region>
</country>
</tree>
</affiliations>
</record>

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