Alteration of the relative levels of iNKT cell subsets is associated with chronic mycobacterial infections

  • Jin S. Im
  • , Tae Jin Kang
  • , Seong Beom Lee
  • , Chi Hong Kim
  • , Sang Haak Lee
  • , Manjunatha M. Venkataswamy
  • , Evan R. Serfass
  • , Bing Chen
  • , Petr A. Illarionov
  • , Gurdyal S. Besra
  • , William R. Jacobs
  • , Gue Tae Chae
  • , Steven A. Porcelli

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

CD1d-restricted invariant natural killer T cells (iNKT cells) have been identified as an important type of effector and regulatory T cell, but their roles in the chronic infectious diseases caused by Mycobacterium tuberculosis and Mycobacterium leprae remain poorly defined. Here, we studied circulating human iNKT cells in blood samples from tuberculosis (TB) and leprosy patients. We found that the percentages of iNKT cells among total circulating T cells in TB and leprosy patients were not significantly different from those in normal controls. However, both TB and leprosy patients showed a selective reduction of the proinflammatory CD4-CD8β- (DN) iNKT cells with a proportionate increase in the CD4+ iNKT cells. Similar phenotypic alterations in circulating iNKT cells were observed in a mouse model of M. tuberculosis infection. Taken together, these findings indicate that the selective reduction of circulating DN iNKT cells is associated with chronic infections caused by M. tuberculosis and M. leprae.

Original languageEnglish
Pages (from-to)214-224
Number of pages11
JournalClinical Immunology
Volume127
Issue number2
DOIs
StatePublished - May 2008

Bibliographical note

Funding Information:
This work was supported by grants to S.A.P. from the NIH (AI063537 and AI45889). S.A.P. received partial support from an Irma T. Hirschl Career Scientist Award. GSB acknowledges support in the form of a Personal Research Chair from Mr. James Bardrick, a Royal Society Wolfson Research Merit Award, as a former Lister Institute-Jenner Research Fellow, the Medical Research Council (G9901077 and G0500590) and The Wellcome Trust (081569/2/06/2). E.S. was supported by the Medical Scientist Training Program of the Albert Einstein College of Medicine. Flow cytometry studies were supported by the FACS Core Facilities of the Center for AIDS Research at the Albert Einstein College of Medicine and Montefiore Medical Center (NIH/NIAID AI51519) and the Albert Einstein Cancer Center (NIH/NCI P30 CA13330).

Keywords

  • CD1d
  • Glycolipid
  • Invariant natural killer T cells
  • Leprosy
  • Mycobacteria
  • Tuberculosis
  • α-Galactosylceramide

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