RESUMO
OBJECTIVE: The mouse mammary tumor virus (MMTV) is the well-established etiological agent of mammary tumors in mice. A series of studies have implicated that a human murine mammary tumor virus-like virus occurs in human breast cancer, but it is unclear whether it has any causal role. METHODS: The aim of the present study was to investigate the presence of MMTV env gene-like sequences in a group of Iranian women with or without breast cancer. A total of 65 breast cancer and 65 noncancerous breast specimens from the Department of Pathology of Tabriz University in East Azerbaijan, Iran, were analyzed by nested PCR. RESULTS: All breast cancer and benign breast samples were negative for MMTV env gene-like DNA. CONCLUSION: These results indicate that the MMTV env gene-like virus may not play a significant role in the etiology of breast cancer among Iranian women.
Assuntos
Neoplasias da Mama/virologia , Genes env , Vírus do Tumor Mamário do Camundongo/genética , Adulto , Animais , Feminino , Humanos , Irã (Geográfico) , Células MCF-7 , Camundongos , Pessoa de Meia-Idade , Reação em Cadeia da PolimeraseRESUMO
The presence of viral DNA in breast cancer cells is controversial. However, some studies have revealed a possible role for the human papillomavirus in the pathogenesis of breast cancer. The aim of the present study was to investigate the presence of HPV-DNA in breast tissue in a group of Iranian women with and without breast cancer and identification of the detected HPV types. Paraffin-embedded specimens from 65 malignant breast cancer cases and 65 cases with benign breast lesions were investigated for presence of HPV-DNA by nested polymerase chain reaction. We found HPV-DNA in 22 (33.8%) of the breast cancer specimens. All non-cancerous specimens were negative. Low and high-risk HPV types, including HPV-6 (26.2%), HPV-16 (1.5%), HPV-35 (1.5%), HPV-52 (1.5%), and HPV-11 (1.5%) were detected in our study. HPV-6 was the most prevalent type in the breast cancer specimens. Although high-risk HPV types have been shown to have a major role in cervix cancer, there have been no data that support the same relevance for other types of malignancies. Furthermore, presence of low-risk HPV types in malignancies still is a matter of debate. The data presented in this study indicates a strong need for epidemiological studies correlating different HPV types in human breast cancer.
Assuntos
Neoplasias da Mama/virologia , DNA Viral/isolamento & purificação , Papillomavirus Humano 11/genética , Papillomavirus Humano 16/genética , Papillomavirus Humano 6/genética , Adulto , Sequência de Bases , Mama/patologia , Mama/virologia , Neoplasias da Mama/genética , DNA Viral/genética , Feminino , Humanos , Irã (Geográfico) , Pessoa de Meia-Idade , Infecções por Papillomavirus/virologia , Análise de Sequência de DNA , Preservação de TecidoRESUMO
Mucoepidermoid carcinoma is a relatively common salivary glands tumor. This tumor is characterized by mucus secretion, cell type can be intermediate or squamous. Mucoepidermoid carcinoma of the bronchi and especially trachea is very unusual. We are reporting the case of a 22 years old female who presented with main complaint of exertional dyspnea and stridor for about 2 month. Bronchoscopy examination showed a mass with smooth surface in trachea. After surgery a low grade mucoepidermoid carcinoma was confirmed by pathological examination.
