ROYAL MONACO RIVIERA WEB MAGAZINE

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PAGINA WEB AMBASCIATA D'ITALIA NEL PRINCIPATO DI MONACO   
  ►http://www.ambprincipatomonaco.esteri.it/Ambasciata_Monaco/ 

MEDICINE & CHINESE TRADITIONAL MEDICINE

Luigi Mattera is a certified by CERFPA (St. Laurent du Var-France) in HOMEOPATHY & ZUO TUINA MASSAGE OF TRADITIONAL CHINESE MEDICINE - Online certificate from TEXAS CHIROPRACTIC COLLEGE (Pasadena-Texas 2007) in CHIROPRACTIC SPORTS & CHIROPRACTIC TREATMENT OF GOLF INJURIES.

In the past, has been Capitain aboard tanker ships where helped care crew when needed. He got a doctorate in Foreigner and Litterature Languages (IULM Milano - Italy) and 3 years University Diploma  in Public Relations and Discipline Administration (IULM Milano)

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PRESENTS:

ROS generation via NOX4 and its utility in the cytological diagnosis of urothelial carcinoma of the urinary bladder

Keiji Shimada , Tomomi Fujii , Satoshi Anai , Kiyohide Fujiimoto and Noboru Konishi

BMC Urology 2011, 11:22doi:10.1186/1471-2490-11-22

Abstract (provisional)

Background

Reactive oxygen species (ROS) production via NADPH oxidase (NOX) contributes to various types of cancer progression. In the present research, we examined the pathobiological role of NADPH oxidase (NOX)4-mediated generation of reactive oxygen species (ROS) in urothelial carcinoma (UC) of the urinary bladder, and demonstrated the utility of ROS labeling in urine cytology.

Methods

NOX4 gene was silenced in vivo and in vitro by NOX4 siRNA transfection with or without atlocollagen. Cell cycle and measurement of ROS were analyzed by flowcytometry. Orthotopic implantation animal model was used in vivo experiment. NOX4 expression in urothelial carcinoma cells was observed by immunohistochemical analysis using surgical specimens of human bladder cancer. Urine cytology was performed after treatment with ROS detection reagents in addition to Papanicolaou staining.

Results

NOX4 was overexpressed in several UC cell lines and the NOX inhibitor, diphenylene iodonium reduced intracellular ROS and induced p16-dependent cell cycle arrest at the G1 phase. Moreover, silencing of NOX4 by siRNA significantly reduced cancer cell growth in vivo as assessed in an orthotopic mouse model. Immunohistochemistry demonstrated high expression of NOX4 in low grade/non-invasive and high grade/invasive UC including precancerous lesions such as dysplasia but not in normal urothelium. Then, we assessed the usefulness of cytological analysis of ROS producing cells in urine (ROS-C). Urine samples obtained from UC cases and normal controls were treated with fluorescent reagents labeling the hydrogen peroxide/superoxide anion and cytological atypia of ROS positive cells were analyzed. As a result, the sensitivity for detection of low grade, non-invasive UC was greatly increased (35% in conventional cytology (C-C) vs. 75% in ROS-C), and the specificity was 95%. Through ROS-C, we observed robust improvement in the accuracy of follow-up urine cytology for cases with previously diagnosed UC, especially in those with low grade/non-invasive cancer recurrence (0% in C-C vs. 64% in ROS-C).

Conclusions

This is the first report demonstrating that ROS generation through NOX4 contributes to an early step of urothelial carcinogenesis and cancer cell survival. In addition, cytology using ROS labeling could be a useful diagnostic tool in human bladder cancer.

The complete article is available as a provisional PDF. The fully formatted PDF and HTML versions are in production.

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