ArticleJournal of medical microbiology2013
Absence of high molecular weight proteins 1 and/or 2 is associated with decreased adherence among non-typeable Haemophilus influenzae clinical isolates.
Article in Journal of medical microbiology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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The trial behind it
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Who cites it
5 citing papers in PubMed.
- A 5'-UTR cis-acting RNA element targeted by RNase III is essential for DNA simple sequence repeat-dependent phase variation in Haemophilus influenzae.Nucleic acids research · 2025Article
- Insights on persistent airway infection by non-typeable Haemophilus influenzae in chronic obstructive pulmonary disease.Pathogens and disease · 2017Review
- Transformed Recombinant Enrichment Profiling Rapidly Identifies HMW1 as an Intracellular Invasion Locus in Haemophilus influenza.PLoS pathogens · 2016Article
- Naturally Acquired HMW1- and HMW2-Specific Serum Antibodies in Adults and Children Mediate Opsonophagocytic Killing of Nontypeable Haemophilus influenzae.Clinical and vaccine immunology : CVI · 2016Article
- Antibodies to the HMW1/HMW2 and Hia adhesins of nontypeable haemophilus influenzae mediate broad-based opsonophagocytic killing of homologous and heterologous strains.Clinical and vaccine immunology : CVI · 2014Article
Corrections and comments
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Authors and funding
8 authors.
Funding
Abstract
High molecular weight (Hmw) proteins 1 and 2, type IV pilin protein (PilA), outer-membrane protein P5 (OmpP5), Haemophilus protein D (Hpd) and Haemophilus adhesive protein (Hap) are surface proteins involved in the adherence of non-typeable Haemophilus influenzae. One hundred clinical isolates were evaluated for the presence of the genes encoding these proteins by PCR and for their adherence capacity (AC) to Detroit 562 nasopharyngeal cells (D562). The majority of isolates were from blood (77/100); other sites were also represented. Confluent D562 monolayers (1.2×10(5) cells per well) were inoculated with standardized minimal infective doses (m.o.i.) of 10(2), 10(3) or 10(4) c.f.u. per well. The AC was categorized as low (<10 %) or high (≥10 %) depending on the percentage of c.f.u. adhering per well. All the isolates evaluated showed adherence: 69/100 (69 %) demonstrated high adherence, while 31/100 (31 %) showed low adherence. Of all the genes evaluated, hmw1A and/or hmw2A were detected in 69/100 (69 %) of isolates. The presence of hmw1A and/or hmw2A was associated with increased adherence to D562 cells (P≤0.001). Dot immunoblots were performed to detect protein expression using mAbs 3D6, AD6 and 10C5. Among the high-adherence isolates (n = 69), 72 % reacted with 3D6 and 21 % with 10C5. Our data indicate that the absence of Hmw1 and/or Hmw2 was associated with decreased adherence to D562 cells.
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