title: A study of three polymorphic sites of ADA gene in colon cancer.
abstract: Adenosine inhibits the immune response in tumors. Adenosine deaminase (ADA) controls adenosine level and as ecto-enzyme acts as costimulatory molecule of adenosine receptors and/or CD26. We examined ADA₁, ADA₂, ADA₆ polymorphic sites of ADA gene in 109 subjects with colon cancer from Rome's population and in 246 blood donors as controls from the same population. In colon cancer ADA₁*2/ADA₂*1 haplotype is more represented, while ADA₁*2/ADA₂*2 is less represented than in controls. ADA₂*2/ADA₆*2 is less represented in patients than in controls. Polymorphic sites of ADA might influence cell-mediated anti-tumor immune responses controlling adenosine level and extraenzymatic protein functions.
authors.affiliation: Department of Surgery, University of Rome Tor Vergata, Rome, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Spina
authors.forename: P
authors.initials: P
authors.lastname: Saccucci
authors.forename: E
authors.initials: E
authors.lastname: Cozzoli
authors.forename: E
authors.initials: E
authors.lastname: Bottini
authors.forename: F
authors.initials: F
authors.lastname: Gloria-Bottini
mesh_terms: D000241:Adenosine / Q000235:genetics / Q000378:metabolism; D000243:Adenosine Deaminase / Q000235:genetics*; D000368:Aged; D003110:Colonic Neoplasms / Q000201:enzymology / Q000235:genetics*; D005260:Female; D005838:Genotype; D006801:Humans; D008297:Male; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D020641:Polymorphism, Single Nucleotide
chemical_list: C548482:ADA protein, human; D000243:Adenosine Deaminase; D000241:Adenosine