Upregulation of Fas and downregulation of CD94?NKG2A inhibitory receptors on circulating natural killer cells in patients with new-onset psoriasis

Sang Wook Son, E. O. Kim, E. S. Ryu, T. J. Kim, J. N. Kim, J. E. Choi, Y. C. Kye, Kyung-Mi Lee

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Background Psoriasis has been considered as a T-helper 1 cell-mediated autoimmune disease driven by collaboration with multiple components of innate and acquired immune cells. Natural killer (NK) cells have been shown to bridge innate and acquired immunity, and thus could potentially contribute to the pathophysiology of psoriasis. Objectives To investigate the phenotypic changes of circulating NK cells in patients with new-onset psoriasis. Methods Fifteen patients with plaque psoriasis (eight women and seven men) who visited our clinic after their first episode of psoriasis and did not have a history of previous systemic therapy or phototherapy participated in this study. Peripheral blood mononuclear cells were isolated and stained with a panel of antibodies against cell surface receptors expressed on T and?or NK cells and analysed by flow cytometry. Results As compared with normal healthy volunteers, patients with new-onset psoriasis showed no significant changes in numbers of peripheral NK, NK-T or T cells. NK activating receptors 2B4, CD48, NKG2D, CD16 and CD56 were found to be unchanged in new-onset psoriasis. However, the expression of Fas (activationinduced death receptor) was upregulated, whereas the expression of the NK inhibitory receptors CD94 and NKG2A was dramatically reduced on NK cells of new-onset psoriasis. These changes occurred at the level of mean fluorescent intensity, but minimally affected percentages of cells expressing Fas, CD94 and NKG2A. Conclusions Our findings demonstrate that changes in the expression of Fas and CD94?NKG2A receptors on NK cells may occur during new-onset psoriasis, and are likely to contribute to the pathogenesis of psoriasis.

Original languageEnglish
Pages (from-to)281-288
Number of pages8
JournalBritish Journal of Dermatology
Volume161
Issue number2
DOIs
Publication statusPublished - 2009 Dec 1

Fingerprint

NK Cell Lectin-Like Receptor Subfamily C
Psoriasis
Natural Killer Cells
Up-Regulation
Down-Regulation
Healthy Volunteers
KIR Receptors
Death Domain Receptors
Th1 Cells
Phototherapy
Cell Surface Receptors
Adaptive Immunity
Innate Immunity
Autoimmune Diseases

Keywords

  • CD94?NKG2A
  • Fas
  • Natural killer cells
  • NK activating receptors
  • NK inhibitory receptors
  • Psoriasis

ASJC Scopus subject areas

  • Dermatology
  • Medicine(all)

Cite this

Upregulation of Fas and downregulation of CD94?NKG2A inhibitory receptors on circulating natural killer cells in patients with new-onset psoriasis. / Son, Sang Wook; Kim, E. O.; Ryu, E. S.; Kim, T. J.; Kim, J. N.; Choi, J. E.; Kye, Y. C.; Lee, Kyung-Mi.

In: British Journal of Dermatology, Vol. 161, No. 2, 01.12.2009, p. 281-288.

Research output: Contribution to journalArticle

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abstract = "Background Psoriasis has been considered as a T-helper 1 cell-mediated autoimmune disease driven by collaboration with multiple components of innate and acquired immune cells. Natural killer (NK) cells have been shown to bridge innate and acquired immunity, and thus could potentially contribute to the pathophysiology of psoriasis. Objectives To investigate the phenotypic changes of circulating NK cells in patients with new-onset psoriasis. Methods Fifteen patients with plaque psoriasis (eight women and seven men) who visited our clinic after their first episode of psoriasis and did not have a history of previous systemic therapy or phototherapy participated in this study. Peripheral blood mononuclear cells were isolated and stained with a panel of antibodies against cell surface receptors expressed on T and?or NK cells and analysed by flow cytometry. Results As compared with normal healthy volunteers, patients with new-onset psoriasis showed no significant changes in numbers of peripheral NK, NK-T or T cells. NK activating receptors 2B4, CD48, NKG2D, CD16 and CD56 were found to be unchanged in new-onset psoriasis. However, the expression of Fas (activationinduced death receptor) was upregulated, whereas the expression of the NK inhibitory receptors CD94 and NKG2A was dramatically reduced on NK cells of new-onset psoriasis. These changes occurred at the level of mean fluorescent intensity, but minimally affected percentages of cells expressing Fas, CD94 and NKG2A. Conclusions Our findings demonstrate that changes in the expression of Fas and CD94?NKG2A receptors on NK cells may occur during new-onset psoriasis, and are likely to contribute to the pathogenesis of psoriasis.",
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AU - Kim, T. J.

AU - Kim, J. N.

AU - Choi, J. E.

AU - Kye, Y. C.

AU - Lee, Kyung-Mi

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N2 - Background Psoriasis has been considered as a T-helper 1 cell-mediated autoimmune disease driven by collaboration with multiple components of innate and acquired immune cells. Natural killer (NK) cells have been shown to bridge innate and acquired immunity, and thus could potentially contribute to the pathophysiology of psoriasis. Objectives To investigate the phenotypic changes of circulating NK cells in patients with new-onset psoriasis. Methods Fifteen patients with plaque psoriasis (eight women and seven men) who visited our clinic after their first episode of psoriasis and did not have a history of previous systemic therapy or phototherapy participated in this study. Peripheral blood mononuclear cells were isolated and stained with a panel of antibodies against cell surface receptors expressed on T and?or NK cells and analysed by flow cytometry. Results As compared with normal healthy volunteers, patients with new-onset psoriasis showed no significant changes in numbers of peripheral NK, NK-T or T cells. NK activating receptors 2B4, CD48, NKG2D, CD16 and CD56 were found to be unchanged in new-onset psoriasis. However, the expression of Fas (activationinduced death receptor) was upregulated, whereas the expression of the NK inhibitory receptors CD94 and NKG2A was dramatically reduced on NK cells of new-onset psoriasis. These changes occurred at the level of mean fluorescent intensity, but minimally affected percentages of cells expressing Fas, CD94 and NKG2A. Conclusions Our findings demonstrate that changes in the expression of Fas and CD94?NKG2A receptors on NK cells may occur during new-onset psoriasis, and are likely to contribute to the pathogenesis of psoriasis.

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