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Lymphocyte responses to Chlamydia antigens in patients with coronary heart disease

S Halme1, H Syrjälä, A Bloigu

  • 1National Public Health Institute, Oulu, Finland.

European Heart Journal
|July 1, 1997
PubMed

Insights

Chlamydia pneumoniae infection shows a strong immune response link to coronary heart disease (CHD) in males. This suggests Chlamydia

Area of Science:

  • Immunology
  • Cardiovascular Medicine
  • Infectious Diseases

Background:

  • Coronary atherosclerosis is a significant health concern.
  • The role of Chlamydia pneumoniae infection in cardiovascular disease is under investigation.
  • Understanding immune responses to Chlamydia may elucidate disease mechanisms.

Purpose of the Study:

  • To investigate the association between Chlamydia pneumoniae infection and coronary atherosclerosis.
  • To analyze cell-mediated and humoral immune responses to Chlamydia in patients with and without coronary heart disease.

Main Methods:

  • Studied 93 patients with coronary heart disease and 115 controls.
  • Assessed cell-mediated immunity via lymphocyte proliferation assays to C. pneumoniae and C. trachomatis antigens.
  • Measured Chlamydia-specific antibodies (IgG, IgA) using microimmunofluorescence.

Main Results:

  • Elevated IgG and IgA antibodies and strong lymphocyte proliferation to C. pneumoniae were associated with coronary heart disease in males.
  • Male patients with coronary heart disease exhibited robust cell-mediated responses to both C. pneumoniae and C. trachomatis.
  • Females with coronary heart disease showed stronger cell-mediated responses to C. pneumoniae than C. trachomatis, similar to controls.

Conclusions:

  • Marked cell-mediated and humoral immunity to C. pneumoniae in males with coronary heart disease suggests a contributing role in pathogenesis.
  • Immune mechanisms triggered by Chlamydia may be a factor in male coronary atherosclerosis.
  • Chlamydia-specific cell-mediated responses appear to be induced by cross-reactive antigens among Chlamydia species.
Abstract

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