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ABSTRACT: Human papillomavirus (HPV) is known to cause cervical cancer. Because it has been detected in lesions of Bowenoid papulosis, Bowen's disease, and Bowen's carcinoma, HPV infection has been implicated in the pathogenesis of these diseases.
A 44-year-old man was diagnosed clinicopathologically with Bowen's carcinoma of the right great toe. He developed multiple organ metastases and died. We examined HPV DNA in skin biopsy specimens from the primary and skin metastatic lesions by polymerase chain reaction (PCR) and in situ hybridization (ISH). The PCR assay was carried out using primer sets specifically designed for detecting the E6 and E7 genes of the HPV types associated with malignancy. Purified and cloned PCR products were subjected to DNA sequence analysis. The ISH studies used INFORM(®) HPV III probes.
We found HPV DNA in specimens from both the primary and the skin metastatic lesions. DNA sequencing detected HPV type 16. We compared the base sequences of viral DNA from the primary and metastatic lesions. Point mutations of the base sequences of the E6 and E7 genes were observed in viral DNA from metastases but not in that from primary lesions. The E6 gene had mutated from G to A in the 383rd base sequence, causing a Glu-to-Lys amino acid change. Results of ISH showed punctuate signals in the nuclei of tumor cells.
We suspect an association between HPV 16 infection and the development of this malignant occurrence.
International journal of dermatology 07/2012; 51(7):804-8. · 1.18 Impact Factor
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ABSTRACT: Although various cultured cells are used for propagating influenza A viruses, the types of cells which can support replication of and plaque production by low pathogenic avian influenza (LPAI) viruses without supplementary trypsin are limited. In this study, the infectivity and growth kinetics of as well as plaque production by LPAI viruses in Caco-2 cells were investigated. The suitability of this cell line for virus isolation was examined and compared with virus isolation in embryonated chicken eggs. Generation of Caco-2 mediated viral variants, if any, was assessed phenotypically and genotypically. It was found that Caco-2 cells can readily support continued replication of LPAI viruses without supplementary trypsin. Viruses replicate to high titer compared to embryonated chicken eggs, and more efficiently than in MDCK cells, without trypsin. Also, LPAI viruses produced plaques in Caco-2 cells. However, these cells were found to be less sensitive than embryonated chicken eggs for virus isolation. Notably, no phenotypic and genotypic changes of the viruses were observed during viral passages (at least up to 10th passage) in Caco-2 cells. These findings indicate that Caco-2 cells may provide an appropriate substrate for studying and cultivating AIVs.
Journal of virological methods 10/2010; 169(1):232-8. · 2.13 Impact Factor
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Hidero Kitasato,
Shinichiro Takahashi,
Makoto Ohbu,
Fumiya Obata,
Zensuke Ogawa,
Yuichi Sato,
Manabu Hattori,
Tatsuo Saito-Taki, Kazuya Hara,
Tetsuroh Okano, [......],
Hiroko Maruyama,
Benio Tsuchiya,
Toshio Okazaki,
Naohito Ishii,
Yukari Nishimura,
Nobukazu Takada,
Michiko Abe,
Kazuo Hachimura,
Kozo Tanigawa,
Masato Katagiri
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ABSTRACT: The aim of education in the Medical Laboratory Science course, Kitasato University School of Allied Health Sciences, is to bring up train students who have Kitasato spirit, for careers in laboratory medicine of hospital or scientific staff of medical companies or as researchers. General and enlightening education concerning "Kitasato spirit" and professional education composed of major subjects was carried out in the first and during the 2nd and two third of 3rd grade, respectively. Medical practice and research training were alternatively carried out for 6 months between November of the 3rd year and November of the 4th year, in order to gain practical experience. Two problem-based learning (PBL) tutorial courses, "Infectious Diseases Course" and "Team Medical Care--Interprofessional Collaborations" were also carried out at the end of the 3rd and beginning of the 4th years, respectively, in order to convert a memory to knowledge. Team medical care course enrolls 1000 students at the School of Allied Health Sciences, Medicine, Nursing, Pharmacy and Kitasato College Applied Clinical Dietetics Course, is now one of special courses available at our university. This attempt is thought to result in a way of thinking that recognizes the importance of co-operation as a team member and personal contributions to actual team medical care.
Rinsho byori. The Japanese journal of clinical pathology 08/2008; 56(7):606-11.
