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Serum antibody response to Moraxella catarrhalis proteins in stringently defined otitis prone children.
Vaccine. 2019 07 26; 37(32):4637-4645.V

Abstract

BACKGROUND

Moraxella catarrhalis (Mcat) is a frequent pathogen of acute otitis media (AOM) in young children. Here we prospectively assessed naturally-induced serum antibodies to four Mcat vaccine candidate proteins in stringently defined otitis prone (sOP) and non-otitis prone (NOP) children age 6-36months old following nasopharyngeal (NP) colonization, at onset of AOM and convalescence from AOM.

METHODS

Serum IgG and IgM antibody against recombinant Mcat proteins, oligopeptide permease A (OppA), outer membrane protein (OMP) CD, hemagglutinin (Hag), and PilA clade 2 (PilA2), were quantitated by ELISA.

RESULTS

During NP colonization by Mcat all four antigens were immunogenic in both sOP and NOP children. However, sOP children had lower antibody responses than NOP children across age 6-36months, similar to our findings for protein vaccine candidates of Streptococcus pneumoniae (Spn) and Nontypeable Haemophilus influenzae (NTHi). sOP children displayed a later and lower peak of antibody rise than NOP children for all four antigens during NP colonization of Mcat. The age-dependent increase of antibody ranked as OppA>Hag5-9>OMP CD>PilA2 in both sOP and NOP children. Lower serum antibody levels to the Mcat antigens were measured in sOP compared to NOP children at the onset of AOM. We did not find a consistent significant increase of antibody at the convalescence phase after an AOM event.

CONCLUSIONS

sOP children is a highly vulnerable population that mount lower serum antibody responses to Mcat candidate vaccine proteins compared to NOP children during asymptomatic NP carriage and at onset of AOM.

Authors+Show Affiliations

Rochester General Hospital Research Institute, Rochester, NY 14621, USA. Electronic address: dabin.ren@rochesterregional.org.Department of Biostatistics and Computational Biology, University of Rochester Medical Center, Rochester, NY 14642, USA.Clinical and Translational Research Center, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, The State University of New York, Buffalo, NY 14214, USA.Department of Infectious Diseases, College of Veterinary Medicine University of Georgia, Athens, GA 30602, USA.Department of Microbiology and Immunology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, The State University of New York, Buffalo, NY 14214, USA.Department of Microbiology and Immunology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, The State University of New York, Buffalo, NY 14214, USA.Rochester General Hospital Research Institute, Rochester, NY 14621, USA.

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural

Language

eng

PubMed ID

28755833

Citation

Ren, Dabin, et al. "Serum Antibody Response to Moraxella Catarrhalis Proteins in Stringently Defined Otitis Prone Children." Vaccine, vol. 37, no. 32, 2019, pp. 4637-4645.
Ren D, Almudevar AL, Murphy TF, et al. Serum antibody response to Moraxella catarrhalis proteins in stringently defined otitis prone children. Vaccine. 2019;37(32):4637-4645.
Ren, D., Almudevar, A. L., Murphy, T. F., Lafontaine, E. R., Campagnari, A. A., Luke-Marshall, N., & Pichichero, M. E. (2019). Serum antibody response to Moraxella catarrhalis proteins in stringently defined otitis prone children. Vaccine, 37(32), 4637-4645. https://doi.org/10.1016/j.vaccine.2017.07.027
Ren D, et al. Serum Antibody Response to Moraxella Catarrhalis Proteins in Stringently Defined Otitis Prone Children. Vaccine. 2019 07 26;37(32):4637-4645. PubMed PMID: 28755833.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Serum antibody response to Moraxella catarrhalis proteins in stringently defined otitis prone children. AU - Ren,Dabin, AU - Almudevar,Anthony L, AU - Murphy,Timothy F, AU - Lafontaine,Eric R, AU - Campagnari,Anthony A, AU - Luke-Marshall,Nicole, AU - Pichichero,Michael E, Y1 - 2017/07/26/ PY - 2017/03/27/received PY - 2017/06/22/revised PY - 2017/07/10/accepted PY - 2017/8/2/pubmed PY - 2020/9/17/medline PY - 2017/7/31/entrez KW - Acute otitis media KW - Carriage KW - Immunogenicity KW - Nasopharyngeal colonization KW - Otitis prone KW - Recombinant proteins SP - 4637 EP - 4645 JF - Vaccine JO - Vaccine VL - 37 IS - 32 N2 - BACKGROUND: Moraxella catarrhalis (Mcat) is a frequent pathogen of acute otitis media (AOM) in young children. Here we prospectively assessed naturally-induced serum antibodies to four Mcat vaccine candidate proteins in stringently defined otitis prone (sOP) and non-otitis prone (NOP) children age 6-36months old following nasopharyngeal (NP) colonization, at onset of AOM and convalescence from AOM. METHODS: Serum IgG and IgM antibody against recombinant Mcat proteins, oligopeptide permease A (OppA), outer membrane protein (OMP) CD, hemagglutinin (Hag), and PilA clade 2 (PilA2), were quantitated by ELISA. RESULTS: During NP colonization by Mcat all four antigens were immunogenic in both sOP and NOP children. However, sOP children had lower antibody responses than NOP children across age 6-36months, similar to our findings for protein vaccine candidates of Streptococcus pneumoniae (Spn) and Nontypeable Haemophilus influenzae (NTHi). sOP children displayed a later and lower peak of antibody rise than NOP children for all four antigens during NP colonization of Mcat. The age-dependent increase of antibody ranked as OppA>Hag5-9>OMP CD>PilA2 in both sOP and NOP children. Lower serum antibody levels to the Mcat antigens were measured in sOP compared to NOP children at the onset of AOM. We did not find a consistent significant increase of antibody at the convalescence phase after an AOM event. CONCLUSIONS: sOP children is a highly vulnerable population that mount lower serum antibody responses to Mcat candidate vaccine proteins compared to NOP children during asymptomatic NP carriage and at onset of AOM. SN - 1873-2518 UR - https://www.unboundmedicine.com/medline/citation/28755833/Serum_antibody_response_to_Moraxella_catarrhalis_proteins_in_stringently_defined_otitis_prone_children_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0264-410X(17)30935-0 DB - PRIME DP - Unbound Medicine ER -