PMID- 15645422 OWN - NLM STAT- MEDLINE DCOM- 20050516 LR - 20160303 IS - 0020-7136 (Print) IS - 0020-7136 (Linking) VI - 114 IP - 6 DP - 2005 May 10 TI - Anti-tumor efficacy of the nucleoside analog 1-(2-deoxy-2-fluoro-4-thio-beta-D-arabinofuranosyl) cytosine (4'-thio-FAC) in human pancreatic and ovarian tumor xenograft models. PG - 1002-9 AB - 1-(2-deoxy-2-fluoro-4-thio-beta-D-arabinofuranosyl) cytosine (4'-thio-FAC) is a deoxycytidine analog that has been shown previously to have impressive anti-proliferative and cytotoxic effects in vitro and in vivo toward colorectal and gastric tumors. In our present studies, the pharmacokinetic behavior in nude mice and the effectiveness of 4'-thio-FAC against human pancreatic and ovarian tumor growth were assessed in comparison with standard chemotherapeutic agents. Potent in vitro anti-proliferative effects were observed against pancreatic (Capan-1, MIA-PaCa-2, BxPC-3) and ovarian (SK-OV-3, OVCAR-3, ES-2) cancer cell lines with IC(50) of 0.01-0.2 microM. In vivo anti-tumor activity was evaluated in nude mice bearing subcutaneously (s.c.) implanted human pancreatic tumor xenografts or intraperitoneally (i.p.) disseminated human ovarian xenografted tumors. Oral daily administration of 4'-thio-FAC for 8-10 days significantly inhibited the growth of gemcitabine-resistant BxPC-3 pancreatic tumors and induced regression of gemcitabine-refractory Capan-1 tumors. 4'-Thio-FAC was also a highly effective inhibitor of ovarian peritoneal carcinomatosis. In the SK-OV-3 and ES-2 ovarian cancer models, 4'-thio-FAC prolonged survival to a greater extent than that observed with gemcitabine. Furthermore, the superiority of 4'-thio-FAC to carboplatin and paclitaxel was demonstrated in the ES-2 clear cell ovarian carcinoma model. Studies provide evidence that 4'-thio-FAC is a promising new alternative to gemcitabine and other chemotherapeutic drugs in the treatment of a variety of tumor indications, including pancreatic and ovarian carcinoma. FAU - Zajchowski, Deborah A AU - Zajchowski DA AD - Department of Cancer Research, Berlex Biosciences, Richmond, CA 97808, USA. Deb_zajchowski@berlex.com FAU - Biroc, Sandra L AU - Biroc SL FAU - Liu, Hsaio-Lai AU - Liu HL FAU - Chesney, Steven K AU - Chesney SK FAU - Hoffmann, Jens AU - Hoffmann J FAU - Bauman, John AU - Bauman J FAU - Kirkland, Thomas AU - Kirkland T FAU - Subramanyam, Babu AU - Subramanyam B FAU - Shen, Jun AU - Shen J FAU - Ho, Elena AU - Ho E FAU - Tseng, Jih-Lie AU - Tseng JL FAU - Dinter, Harald AU - Dinter H LA - eng PT - Journal Article PL - United States TA - Int J Cancer JT - International journal of cancer JID - 0042124 RN - 0 (1-(2-deoxy-2-fluoro-4-thio-arabinofuranosyl)cytosine) RN - 04079A1RDZ (Cytarabine) SB - IM MH - Animals MH - Carcinoma/*drug therapy/pathology/veterinary MH - Cytarabine/*analogs & derivatives/*pharmacology MH - Disease Models, Animal MH - Female MH - Mice MH - Mice, Nude MH - Ovarian Neoplasms/*drug therapy/pathology/veterinary MH - Pancreatic Neoplasms/*drug therapy/pathology/veterinary MH - Transplantation, Heterologous MH - Tumor Cells, Cultured EDAT- 2005/01/13 09:00 MHDA- 2005/05/17 09:00 CRDT- 2005/01/13 09:00 PHST- 2005/01/13 09:00 [pubmed] PHST- 2005/05/17 09:00 [medline] PHST- 2005/01/13 09:00 [entrez] AID - 10.1002/ijc.20835 [doi] PST - ppublish SO - Int J Cancer. 2005 May 10;114(6):1002-9. doi: 10.1002/ijc.20835.