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Annals of Clinical & Laboratory Science 34:271-276 (2004)
© 2004 Association of Clinical Scientists

Review

Arsenic Trioxide (As2O3) Sensitivity of Carcinoma Cell Lines and Cancer Cells from Patients with Carcinomatosis Peritonei

Yeonsook Moon1, Gyeongsin Park2, Yonggoo Kim2, Myungshin Kim2, Jihyang Lim2, Soo Hwan Pai1, Eun Jung Lee2, Chang Suk Kang2 and Kyungja Han2
1 Department of Clinical Pathology, Inha University Medical College, Seoul, Korea 2 Department of Clinical Pathology, Catholic University Medical College, Seoul, Korea

Address correspondence to Kyungja Han, M.D., Department of Clinical Pathology, Catholic University Medical College, St. Mary’s Hospital, Youngdeungpo-gu, Youido-dong 62, Seoul, Korea (South) 150-713; tel 82 2 3779 1297; fax 82 2 783 6648; e-mail: hankja{at}catholic.ac.kr.

The effectiveness of As2O3 treatment was studied in 3 carcinoma cell lines, LoVo, OVCAR-3, and PA-1, and in cancer cells obtained from ascites fluids of 8 patients with carcinomatosis peritonei. LoVo, OVCAR-3, and PA-1 cell lines, and cancer cells from the patients were cultured in As2O3 gradient media; As2O3 sensitivity was evaluated by trypan blue dye exclusion and by morphologic examination after Wright staining. PA-1 was the most sensitive cell line to As2O3; OVCAR-3 and LoVo were resistant to As2O3. Cancer cells from 2 of 8 patients were sensitive to As2O3. The in vivo tumoricidal effect of As2O3 (100 µg/day, ip) was studied in 30 BALB/c nude mice following ip implantation of PA-1 tumor cells. The 17 As2O3-injected mice died of extensive intratumoral hemorrhage, necrosis, and hemorrhagic ascites within 48 hr after initial treatment. In 10 As2O3-untreated tumor-bearing control mice, only focal intratumoral hemorrhage and necrosis were noted. In summary, solid tumor cell lines and cancer cells from patients showed various As2O3 sensitivities in vitro, and As2O3 had a marked tumoricidal effect on PA-1 cells in vivo. These results suggest that As2O3 treatment might possibly be beneficial in patients with carcinomatosis peritonei who are resistant to conventional therapy and whose tumors show in vitro sensitivity to As2O3. However, to minimize the life-threatening tumor lysis effect, it would be better to administer As2O3 after removal of the peritoneal tumor masses.

Keywords: As2O3, carcinoma cell lines, carcinomatosis peritonei, cancer chemotherapy






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