J Periodontal Implant Sci.  2015 Oct;45(5):178-183. 10.5051/jpis.2015.45.5.178.

Humoral immune responses to periodontal pathogens in the elderly

Affiliations
  • 1Department of Oral & Maxillofacial Surgery, Chonnam National University School of Dentistry, Gwangju, Korea.
  • 2Department of Periodontology, Chonnam National University School of Dentistry, Gwangju, Korea. swlee@chonnam.ac.kr
  • 3Department of Orthodontics, Chonnam National University School of Dentistry, Gwangju, Korea.
  • 4Department of Preventive Medicine, Chonnam National University Medical School, Gwangju, Korea.
  • 5Department of Dental Education, Dental Science Research Institute, Chonnam National University School of Dentistry, Gwangju, Korea.

Abstract

PURPOSE
Elderly people are thought to be more susceptible to periodontal disease due to reduced immune function associated with aging. However, little information is available on the nature of immune responses against putative periodontal pathogens in geriatric patients. The purpose of this study was to evaluate the serum IgG antibody responses to six periodontal pathogens in geriatric subjects.
METHODS
The study population consisted of 85 geriatric patients and was divided into three groups: 29 mild (MCP), 27 moderate (MoCP) and 29 severe (SCP) chronic periodontitis patients. Serum levels of IgG antibody to Porphyromonas gingivalis, Tannerella forsythia, Treponema denticola, Aggregatibacter actinomycetemcomitans, Fusobacterium nucleatum and Prevotella intermedia were measured by enzyme-linked immunosorbent assay (ELISA) and compared among the groups.
RESULTS
All three groups showed levels of serum IgG in response to P. gingivalis, A. actinomycetemcomitans, and P. intermedia that were three to four times higher than levels of IgG to T. forsythia, T. denticola, and F. nucleatum. There were no significant differences among all three groups in IgG response to P. gingivalis (P=0.065), T. forsythia (P=0.057), T. denticola (P=0.1), and P. intermedia (P=0.167), although the IgG levels tended to be higher in patients with SCP than in those with MCP or MoCP (with the exception of those for P. intermedia). In contrast, there were significant differences among the groups in IgG levels in response to F. nucleatum (P=0.001) and A. actinomycetemcomitans (P=0.003). IgG levels to A. actinomycetemcomitans were higher in patients with MCP than in those with MoCP or SCP.
CONCLUSIONS
When IgG levels were compared among three periodontal disease groups, only IgG levels to F. nucleatum significantly increased with the severity of disease. On the contrary, IgG levels to A. actinomycetemcomitans decreased significantly in patients with SCP compared to those with MCP. There were no significant differences in the IgG levels for P. gingivalis, T. forsythia, T. denticola, and P. intermedia among geriatric patients with chronic periodontitis.

Keyword

Chronic periodontitis; Disease progression; Enzyme-Linked Immunosorbent Assay; Geriatrics; Immunoglobulin G

MeSH Terms

Aged*
Aggregatibacter actinomycetemcomitans
Aging
Antibody Formation
Chronic Periodontitis
Disease Progression
Enzyme-Linked Immunosorbent Assay
Forsythia
Fusobacterium nucleatum
Geriatrics
Humans
Immunity, Humoral*
Immunoglobulin G
Periodontal Diseases
Porphyromonas gingivalis
Prevotella intermedia
Treponema denticola
Immunoglobulin G

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