title: Sulfane sulfur deficiency in malignant cells, increasing the inhibiting action of acetone cyanohydrin in tumor growth.
abstract: OBJECTIVE
  To demonstrate the irreversible poisoning action of the acetone cyanohydrin (AC) in malignant cells.
  
  
  METHODS
  Thirty male Swiss mice were inoculated with 1 x 10³ Ehrlich tumor (ET) cells. The mice were divided into three groups (n=10): CG (saline); ACG1 (1.864 mg/Kg of AC) and ACG2 (2.796 mg/Kg of AC), treated every 48 hours from day 3 until day 13. On day 15 the mice were euthanized and the number of viable cells in ascites was determined. In the meantime, ET cells were incubated with AC (0.5, 1.0, 2.0 μg/mL). Cell viability and percentage of growth inhibition (PGI) were checked after one, two, three, four, 18 and 24 hours.
  
  
  RESULTS
  There was reduction in volume and number of viable cells in ACG1 and ACG2 compared to CG. In ACG1 one of the animals did not present ascites. In ACG2 two mice did not present ascites and in CG none of the mice present ascites. The action of AC was dose and time dependent and there was no significant difference among the three doses.
  
  
  CONCLUSIONS
  The acetone cyanohydrin promoted reduction of the tumor and also prevented tumor development in 20% of the treated animals.
authors.forename: Rondon Tosta
authors.initials: RT
authors.lastname: Ramalho
authors.forename: Ricardo Dutra
authors.initials: RD
authors.lastname: Aydos
authors.forename: Iandara
authors.initials: I
authors.lastname: Schettert
authors.forename: Peterson Vieira de
authors.initials: PV
authors.lastname: Assis
authors.forename: Pedro Carvalho
authors.initials: PC
authors.lastname: Cassino
mesh_terms: D000818:Animals; D016588:Anticarcinogenic Agents / Q000627:therapeutic use*; D002286:Carcinoma, Ehrlich Tumor / Q000473:pathology / Q000517:prevention & control*; D002452:Cell Count; D002470:Cell Survival; D003486:Cyanides / Q000633:toxicity*; D006131:Growth Inhibitors / Q000627:therapeutic use*; D008297:Male; D051379:Mice; D009570:Nitriles / Q000627:therapeutic use*; D010534:Peritoneal Neoplasms / Q000473:pathology / Q000517:prevention & control*; D011897:Random Allocation; D013457:Sulfur Compounds / Q000378:metabolism*
chemical_list: D016588:Anticarcinogenic Agents; D003486:Cyanides; D006131:Growth Inhibitors; D009570:Nitriles; D013457:Sulfur Compounds; C010833:acetone cyanohydrin