title: Relation between maternal serum adenosine deaminase and plasma adenosine levels in twin pregnancies.
abstract: OBJECTIVE
  The relationship between adenosine deaminase activity and plasma adenosine was examined in non-pregnancy as well as in singleton and twin pregnancies.
  
  
  METHODS
  Whole-blood samples were taken from 11 singleton and 11 dichorionic twin pregnant women during the third trimester. The plasma adenosine levels were assayed with a modified high-performance liquid chromatographic method, while the adenosine deaminase levels were measured enzymatically.
  
  
  RESULTS
  The adenosine deaminase and plasma adenosine levels were both higher in twin pregnancies compared to singleton and non-pregnancies.
  
  
  CONCLUSIONS
  Increased plasma adenosine is not due to decreased serum adenosine deaminase levels in twin pregnant women.
authors.affiliation: Department of Obstetrics and Gynecology, Tokyo Rinkai Hospital, Tokyo 113-8603, Japan.
authors.forename: Shunji
authors.initials: S
authors.lastname: Suzuki
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Yoneyama
authors.forename: Rintaro
authors.initials: R
authors.lastname: Sawa
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Araki
mesh_terms: D000241:Adenosine / Q000097:blood*; D000243:Adenosine Deaminase / Q000097:blood*; D000328:Adult; D005260:Female; D006801:Humans; D011247:Pregnancy; D011272:Pregnancy, Multiple / Q000097:blood*; D014427:Twins
chemical_list: D000243:Adenosine Deaminase; D000241:Adenosine