CENP-O, a protein localized at the centromere throughout the cell cycle, is a novel target antigen in systemic sclerosis

Akiko Saito, Yoshinao Muro, Kazumitsu Sugiura, Masashi Ikeno, Kinya Yoda, Yasushi Tomita

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Objective. CENP-A, -B, and -C are major centromere components and the main targets of anticentromere antibodies (ACA). Many other proteins are also assembled around CENP-A nucleosomes in interphase nuclei to form the interphase centromere complex (ICEN). The CENP-O protein is a component of the ICEN that localizes at the centromere throughout the cell cycle. We investigated whether CENP-O is also targeted by sera from patients with systemic autoimmune diseases. Methods. Sera from 114 patients with ACA and 142 patients without ACA were analyzed. Western blotting and an ELISA with bacterially expressed recombinant CENP-O protein were performed to screen for the presence of anti-CENP-O antibodies. In addition, anti-CENP-O antibody-positive sera were tested by Western blotting HeLa cell extracts to examine reactivity with the major centromere antigens. Results. Four female patients with ACA had anti-CENP-O antibodies. There was no correlation of anti-CENP-O antibodies with specific clinical features or other serological features. However, one of the 4 patients, who showed a unique clinical course of scleroderma, had sera with markedly high reactivity to CENP-O. Conclusion. CENP-O protein is a novel centromere antigen that is recognized by a very minor population of ACA-positive patients with scleroderma. Because CENP-O is an ICEN component, ICEN may be a large antigenic structure in systemic autoimmunity. The Journal of Rheumatology

Original languageEnglish
Pages (from-to)781-786
Number of pages6
JournalJournal of Rheumatology
Volume36
Issue number4
DOIs
Publication statusPublished - 01-04-2009
Externally publishedYes

Fingerprint

Centromere
Systemic Scleroderma
Cell Cycle
Interphase
Antigens
Proteins
Antibodies
Serum
Western Blotting
Nucleosomes
Rheumatology
Cell Extracts
Autoimmunity
HeLa Cells
Autoimmune Diseases
Enzyme-Linked Immunosorbent Assay
anticentromere antibody

All Science Journal Classification (ASJC) codes

  • Rheumatology
  • Immunology and Allergy
  • Immunology

Cite this

Saito, Akiko ; Muro, Yoshinao ; Sugiura, Kazumitsu ; Ikeno, Masashi ; Yoda, Kinya ; Tomita, Yasushi. / CENP-O, a protein localized at the centromere throughout the cell cycle, is a novel target antigen in systemic sclerosis. In: Journal of Rheumatology. 2009 ; Vol. 36, No. 4. pp. 781-786.
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CENP-O, a protein localized at the centromere throughout the cell cycle, is a novel target antigen in systemic sclerosis. / Saito, Akiko; Muro, Yoshinao; Sugiura, Kazumitsu; Ikeno, Masashi; Yoda, Kinya; Tomita, Yasushi.

In: Journal of Rheumatology, Vol. 36, No. 4, 01.04.2009, p. 781-786.

Research output: Contribution to journalArticle

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T1 - CENP-O, a protein localized at the centromere throughout the cell cycle, is a novel target antigen in systemic sclerosis

AU - Saito, Akiko

AU - Muro, Yoshinao

AU - Sugiura, Kazumitsu

AU - Ikeno, Masashi

AU - Yoda, Kinya

AU - Tomita, Yasushi

PY - 2009/4/1

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N2 - Objective. CENP-A, -B, and -C are major centromere components and the main targets of anticentromere antibodies (ACA). Many other proteins are also assembled around CENP-A nucleosomes in interphase nuclei to form the interphase centromere complex (ICEN). The CENP-O protein is a component of the ICEN that localizes at the centromere throughout the cell cycle. We investigated whether CENP-O is also targeted by sera from patients with systemic autoimmune diseases. Methods. Sera from 114 patients with ACA and 142 patients without ACA were analyzed. Western blotting and an ELISA with bacterially expressed recombinant CENP-O protein were performed to screen for the presence of anti-CENP-O antibodies. In addition, anti-CENP-O antibody-positive sera were tested by Western blotting HeLa cell extracts to examine reactivity with the major centromere antigens. Results. Four female patients with ACA had anti-CENP-O antibodies. There was no correlation of anti-CENP-O antibodies with specific clinical features or other serological features. However, one of the 4 patients, who showed a unique clinical course of scleroderma, had sera with markedly high reactivity to CENP-O. Conclusion. CENP-O protein is a novel centromere antigen that is recognized by a very minor population of ACA-positive patients with scleroderma. Because CENP-O is an ICEN component, ICEN may be a large antigenic structure in systemic autoimmunity. The Journal of Rheumatology

AB - Objective. CENP-A, -B, and -C are major centromere components and the main targets of anticentromere antibodies (ACA). Many other proteins are also assembled around CENP-A nucleosomes in interphase nuclei to form the interphase centromere complex (ICEN). The CENP-O protein is a component of the ICEN that localizes at the centromere throughout the cell cycle. We investigated whether CENP-O is also targeted by sera from patients with systemic autoimmune diseases. Methods. Sera from 114 patients with ACA and 142 patients without ACA were analyzed. Western blotting and an ELISA with bacterially expressed recombinant CENP-O protein were performed to screen for the presence of anti-CENP-O antibodies. In addition, anti-CENP-O antibody-positive sera were tested by Western blotting HeLa cell extracts to examine reactivity with the major centromere antigens. Results. Four female patients with ACA had anti-CENP-O antibodies. There was no correlation of anti-CENP-O antibodies with specific clinical features or other serological features. However, one of the 4 patients, who showed a unique clinical course of scleroderma, had sera with markedly high reactivity to CENP-O. Conclusion. CENP-O protein is a novel centromere antigen that is recognized by a very minor population of ACA-positive patients with scleroderma. Because CENP-O is an ICEN component, ICEN may be a large antigenic structure in systemic autoimmunity. The Journal of Rheumatology

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