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Vaccine. 2014 Feb 7;32(7):881-7. doi: 10.1016/j.vaccine.2013.12.009. Epub 2013 Dec 18.

Leptin and leptin-related gene polymorphisms, obesity, and influenza A/H1N1 vaccine-induced immune responses in older individuals.

Author information

1
Mayo Clinic Vaccine Research Group, Mayo Clinic, Rochester, MN, USA; Program in Translational Immunovirology and Biodefense, Mayo Clinic, Rochester, MN, USA.
2
Mayo Clinic Vaccine Research Group, Mayo Clinic, Rochester, MN, USA.
3
Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA.
4
Mayo Clinic Vaccine Research Group, Mayo Clinic, Rochester, MN, USA; Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, MN, USA.
5
Mayo Clinic Vaccine Research Group, Mayo Clinic, Rochester, MN, USA; Program in Translational Immunovirology and Biodefense, Mayo Clinic, Rochester, MN, USA; Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, MN, USA. Electronic address: poland.gregory@mayo.edu.

Abstract

Obesity is a risk factor for complicated influenza A/H1N1 disease and poor vaccine immunogenicity. Leptin, an adipocyte-derived hormone/cytokine, has many immune regulatory functions and therefore could explain susceptibility to infections and poor vaccine outcomes. We recruited 159 healthy adults (50-74 years old) who were immunized with inactivated TIV influenza vaccine that contained A/California/7/2009/H1N1 virus. We found a strong correlation between leptin concentration and BMI (r=0.55, p<0.0001), but no association with hemagglutination antibody inhibition (HAI), B-cell, or granzyme B responses. We found a slight correlation between leptin concentration and an immunosenescence marker (TREC: T-cell receptor excision circles) level (r=0.23, p=0.01). We found eight SNPs in the LEP/LEPR/GHRL genes that were associated with leptin levels and four SNPs in the PTPN1/LEPR/STAT3 genes associated with peripheral blood TREC levels (p<0.05). Heterozygosity of the synonymous variant rs2230604 in the PTPN1 gene was associated with a significantly lower (531 vs. 259, p=0.005) TREC level, as compared to the homozygous major variant. We also found eight SNPs in the LEP/PPARG/CRP genes associated with variations in influenza-specific HAI and B-cell responses (p<0.05). Our results suggest that specific allelic variations in the leptin-related genes may influence adaptive immune responses to influenza vaccine.

KEYWORDS:

A/H1N1 virus; Adipocyte; BMI; Immune response; Immunosenescence; Influenza vaccine; Leptin; Obese; SNPs

PMID:
24360890
PMCID:
PMC3922536
DOI:
10.1016/j.vaccine.2013.12.009
[Indexed for MEDLINE]
Free PMC Article
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