title: Diallyl disulfide suppresses the growth of human colon tumor cell xenografts in athymic nude mice.
abstract: The present studies examined the anti-proliferative effects of diallyl disulfide (DADS) on the growth of human colon tumor cell line, HCT-15, xenografts in 6-wk-old female NCr nu/nu mice with an initial body weight of 20-22 g. Intraperitoneal injection of 1 mg DADS thrice weekly reduced tumor volume by 69% (P < 0.05) without apparent ill consequences such as altered growth of the host. Providing this quantity of DADS intragastrically also inhibited growth of the HCT-15 tumor. At equivalent DADS dosages, intraperitoneal treatment was proportionately more effective (P < 0.05) in reducing tumor growth than gastric intubation. Tumor inhibition caused by DADS (0.5 mg thrice weekly) was similar to that occurring with 5-fluorouracil (5-FU) treatment (0.5 mg thrice weekly). Combining DADS and 5-FU was no more effective in inhibiting tumor growth than using either compound alone. However, concurrent DADS treatment significantly (P < 0.05) inhibited the depression in leukocyte counts and spleen weight and prevented the elevated plasma urea caused by 5-FU treatment. These data suggest that DADS, a constituent of garlic oil, reduces the toxicity of 5-FU and is an effective antitumorigenic agent against xenografts resulting from an established human colon tumor cell line.
authors.affiliation: Department of Nutrition, The Pennsylvania State University, University Park, 16802, USA.
authors.forename: S G
authors.initials: SG
authors.lastname: Sundaram
authors.forename: J A
authors.initials: JA
authors.lastname: Milner
mesh_terms: D000284:Administration, Oral; D000498:Allyl Compounds; D000818:Animals; D000970:Antineoplastic Agents / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use*; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D001835:Body Weight / Q000187:drug effects; D002455:Cell Division / Q000187:drug effects; D003110:Colonic Neoplasms / Q000188:drug therapy* / Q000473:pathology; D004220:Disulfides / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use*; D004305:Dose-Response Relationship, Drug; D004357:Drug Synergism; D005260:Female; D005472:Fluorouracil / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D006801:Humans; D007274:Injections, Intraperitoneal; D007962:Leukocytes; D051379:Mice; D008819:Mice, Nude; D009368:Neoplasm Transplantation; D010938:Plant Oils / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use*; D014183:Transplantation, Heterologous; D014407:Tumor Cells, Cultured; D014508:Urea / Q000097:blood
chemical_list: D000498:Allyl Compounds; D000970:Antineoplastic Agents; D004220:Disulfides; D010938:Plant Oils; C028009:diallyl disulfide; D014508:Urea; D005472:Fluorouracil