5-Aminolevulinic Acid Fluorescence in Detection of Peritoneal Metastases

Yonemura, Yutaka; Canbay, Emel; Ishibashi, Haruaki; Nishino, Eisei; Endou, Yoshio; Sako, Shouzou; Ogura, Shun-Ichirou

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자료유형: 학술저널

저자정보: Yonemura, Yutaka (NPO Organization to Support Peritoneal Dissemination Treatment) Canbay, Emel (NPO Organization to Support Peritoneal Dissemination Treatment) Ishibashi, Haruaki (NPO Organization to Support Peritoneal Dissemination Treatment) Nishino, Eisei (Department of Pathology, Kishiwada Tokushukai Hospital) Endou, Yoshio (NPO Organization to Support Peritoneal Dissemination Treatment) Sako, Shouzou (Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Central Research Resource Branch) Ogura, Shun-Ichirou

저널정보: 아시아태평양암예방학회 Asian Pacific journal of cancer prevention : APJCP Asian Pacific journal of cancer prevention : APJCP 제17권 제4호

발행연도: 2016.1

수록면: 2,271 - 2,275 (5page)

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Background: The value of 5-aminolevulinic acid (ALA) in fluorescence detection of peritoneal metastases and the underlying mechanisms were evaluated in patients with peritoneal surface malignancies. Materials and Methods: Oral 5-ALA was administered at a concentration of 20 mg/kg body weight with 50 ml of water 2 hours prior to surgery (n=115). The diagnostic value of 5-ALA based fluorescence production was evaluated following white light inspection during prior to cytoreductive surgery and hyperthermic intraperitoneal chemotherapy. Then, peptide transporter PEPT1 (ALA influx transporter) and ATP-binding cassette transporter ABCG2 (porphyrin efflux transporter) gene expression was determined with quantitative real time (qRT)-PCR and pathological diagnoses confirmed for all tissue samples. Results: The 5-ALA based photodynamic detection rate was 17% for appendiceal mucinous neoplasms, 54% for colorectal cancers, 33% for gastric cancers, 67% for diffuse malign peritoneal mesotheliomas, and 89% for epithelial ovarian cancer of peritoneal metastases. 5-ALA was detected in all cases of peritoneal metastases originating from cholangiocarcinomas whereas it was not able to detect any in granulosa cell and gastrointestinal stromal tumor cases. Furthermore, PEPT1 was overexpressed whereas ABCG2 expression was downregulated in tumors detected with fluorescence. Conclusions: 5-ALA provided 100% specificity and high sensitivity to detect peritoneal metastases in subgroups of patients with peritoneal surface mailgnancies. ALA influx transporter PEPT1 and porphyrin efflux transporter ABCG2 genes are important in tumor specific 5-ALA induced fluorescence in vivo. Further studies should clarify diagnostic utility of 5-ALA in peritoneal surface malignancies.

#Aminolevulinic acid #photodynamic diagnosis #peritoneal surface malignancies #PEPT1 #ABCG2

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