Low prevalence of human mammary tumor virus (HMTV) in breast cancer patients from Myanmar

Thar Htet San, Masayoshi Fujisawa, Soichiro Fushimi, Teizo Yoshimura, Toshiaki Ohara, Lamin Soe, Ngu Wah Min, Ohnmar Kyaw, Xu Yang, Akihiro Matsukawa

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Background: Human mammary tumor virus (HMTV) is 90-95% homologous to mouse mammary tumor virus (MMTV), one of the causal agents of murine mammary tumors. HMTV (MMTV-like) sequences were reported to be present in human breast cancers from several populations with a prevalence range of 0-78%; however, the prevalence of HMTV in breast cancers from Myanmar remains unknown. Methods: Fifty-eight breast cancer samples from Myanmar women were examined in this study. DNA was isolated from formalin-fixed paraffin-embedded specimens, and HMTV envelope sequences were detected by semi-nested PCR. The sequence of the PCR products was also confirmed. Results: Only 1.7% (1 of 58) of the breast cancers were positive for HMTV, and the sequence of PCR products was 98.9% identical to the reference HMTV sequence (GenBank accession No. AF243039). The tumor with HMTV was grade III invasive ductal carcinoma, 7.0 cm in size with lymph node metastasis (T3, N1, M0). Conclusions: We, for the first time, investigated the presence of HMTV in Myanmar breast cancer patients. In accordance with other Asian studies, the prevalence of HMTV in Myanmar was quite low, supporting the hypothesis that Asian breast cancers have different etiologies than in Western countries, where HMTV is more prevalent.

Original languageEnglish
Article number20
JournalInfectious Agents and Cancer
Volume12
Issue number1
DOIs
Publication statusPublished - Apr 12 2017

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Myanmar
Oncogenic Viruses
Breast Neoplasms
Mouse mammary tumor virus
Polymerase Chain Reaction
Ductal Carcinoma

Keywords

  • Breast cancer
  • Human mammary tumor virus
  • Mouse mammary tumor virus

ASJC Scopus subject areas

  • Epidemiology
  • Oncology
  • Cancer Research
  • Infectious Diseases

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Low prevalence of human mammary tumor virus (HMTV) in breast cancer patients from Myanmar. / San, Thar Htet; Fujisawa, Masayoshi; Fushimi, Soichiro; Yoshimura, Teizo; Ohara, Toshiaki; Soe, Lamin; Min, Ngu Wah; Kyaw, Ohnmar; Yang, Xu; Matsukawa, Akihiro.

In: Infectious Agents and Cancer, Vol. 12, No. 1, 20, 12.04.2017.

Research output: Contribution to journalArticle

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abstract = "Background: Human mammary tumor virus (HMTV) is 90-95{\%} homologous to mouse mammary tumor virus (MMTV), one of the causal agents of murine mammary tumors. HMTV (MMTV-like) sequences were reported to be present in human breast cancers from several populations with a prevalence range of 0-78{\%}; however, the prevalence of HMTV in breast cancers from Myanmar remains unknown. Methods: Fifty-eight breast cancer samples from Myanmar women were examined in this study. DNA was isolated from formalin-fixed paraffin-embedded specimens, and HMTV envelope sequences were detected by semi-nested PCR. The sequence of the PCR products was also confirmed. Results: Only 1.7{\%} (1 of 58) of the breast cancers were positive for HMTV, and the sequence of PCR products was 98.9{\%} identical to the reference HMTV sequence (GenBank accession No. AF243039). The tumor with HMTV was grade III invasive ductal carcinoma, 7.0 cm in size with lymph node metastasis (T3, N1, M0). Conclusions: We, for the first time, investigated the presence of HMTV in Myanmar breast cancer patients. In accordance with other Asian studies, the prevalence of HMTV in Myanmar was quite low, supporting the hypothesis that Asian breast cancers have different etiologies than in Western countries, where HMTV is more prevalent.",
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AU - Fushimi, Soichiro

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AU - Ohara, Toshiaki

AU - Soe, Lamin

AU - Min, Ngu Wah

AU - Kyaw, Ohnmar

AU - Yang, Xu

AU - Matsukawa, Akihiro

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