High viral load of Merkel cell polyomavirus DNA sequences in Langerhans cell sarcoma tissues. - Archive ouverte HAL Access content directly
Journal Articles Infectious Agents and Cancer Year : 2014

High viral load of Merkel cell polyomavirus DNA sequences in Langerhans cell sarcoma tissues.

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Takeshi Iwasaki
  • Function : Author
  • PersonId : 956327
Satoshi Kuwamoto
  • Function : Author
  • PersonId : 956328
Masako Kato
  • Function : Author
  • PersonId : 956329
Yasushi Horie
  • Function : Author
  • PersonId : 956330
Kazuhiko Hayashi
  • Function : Author
  • PersonId : 956331
Shu Nakamoto
  • Function : Author
  • PersonId : 956334
Mitsunori Yamakawa
  • Function : Author
  • PersonId : 956335
Hirokazu Nakamine
  • Function : Author
  • PersonId : 956336
Katsuyoshi Takata
  • Function : Author
  • PersonId : 956337
Takashi Oka
  • Function : Author
  • PersonId : 956338
Tadashi Yoshino
  • Function : Author
  • PersonId : 956339

Abstract

BACKGROUND: Langerhans cell (LC) sarcoma (LCS) is a high-grade neoplasm with overtly malignant cytologic features and an LC phenotype. We very recently suggested that LC behaves as a reservoir for common dermotropic Merkel cell polyomavirus (MCPyV) and determined the relationship between LC histiocytosis (LCH), which has an underlining oncogenic capacity, and MCPyV as a trigger for a reactive process rather than a neoplastic process. We propose LC to be a reservoir for MCPyV and hypothesize that some LCS subtypes may be related to the MCPyV agent. FINDINGS: We examined seven LCS tissues using multiplex quantitative PCR (Q-PCR) and immunohistochemistry with anti MCPyV large-T (LT) antigen antibody. High viral loads of MCPyV DNA sequences (viral load = relative levels of MCPyV) were detected (0.328-0.772 copies/cell (Merkel cell carcinoma (MCC) = 1.0)) using Q-PCR in 43% (3/7) tissues, but LT antigen expression was not observed (0/7). CONCLUSIONS: Frequent MCPyV-DNA amplification suggests that LCS in some patients may be related to MCPyV infection. Moreover, the higher viral load of LCS (median, 0.453 copies/cell) than low load of LCH (0.003, median of 12 cases) (P < 0.01) may suggest a virally induced tumorigenic process in some LCS. Although the absence of LT antigen expression may indicate a different role for MCPyV in this pathology, some subtypes of LCS may develop in the background of MCPyV-infected LC. To the best of our knowledge, this is the first report on the relationship between MCPyV and LCS. The recent discovery of MCPyV opened new therapeutic avenues for MCC. These data open novel possibilities for therapeutic interventions against LCS.
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Dates and versions

inserm-00991784 , version 1 (16-05-2014)

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Ichiro Murakami, Michiko Matsushita, Takeshi Iwasaki, Satoshi Kuwamoto, Masako Kato, et al.. High viral load of Merkel cell polyomavirus DNA sequences in Langerhans cell sarcoma tissues.. Infectious Agents and Cancer, 2014, 9 (1), pp.15. ⟨10.1186/1750-9378-9-15⟩. ⟨inserm-00991784⟩
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