title: Serum adenosine deaminase activity in monitoring disease activity and response to therapy in severe psoriasis.
abstract: OBJECTIVE
  Activity of Serum Adenosine Deaminase (ADA), a main enzyme in purine degradation and considered as a marker for non-specific T cell activation, in psoriasis has been investigated in a few studies with conflicting results.
  
  
  METHODS
  To evaluate the significance of serum ADA activity in psoriasis, and analyze whether ADA activity may be related to disease activity, we performed a prospective study with 38 cases of psoriasis and 24 healthy volunteers. Patients were divided into two groups as cases with local and stable lesions (Group i, n: 20) and severe cases with extensive involvement (Group ii, n: 18). Serum ADA activity was determined by modified Guisti procedure.
  
  
  RESULTS
  When taken into consideration of all patients--regardless of the severity of the disease--the mean serum ADA activity of psoriatics did not differ significantly from that of controls (p > 0.05). However, it was higher in Group ii than in Group i and healthy controls (respectively p < 0.001 and p < 0.05). A significant decrease was observed also after therapy only in Group ii (p < 0.001).
  
  
  CONCLUSIONS
  Serum ADA activity may be correlated to the disease activity of severe psoriasis. We suggest that it might be a serologic marker for follow-up of in such cases. It could be used in predicting relapses before clinical findings as well as in deciding to stop or decrease systemic therapies at the right time, which have potential to cause severe systemic side effects when given for a long period. Further studies with larger case populations are required to support our findings.
authors.affiliation: Gaziantep University, Department of Dermatology, Medical Faculty, Gaziantep, Turkey. zerbagci@yahoo.com
authors.forename: Zülal
authors.initials: Z
authors.lastname: Erbagci
authors.forename: A Binnur
authors.initials: AB
authors.lastname: Erbagci
authors.forename: Oya
authors.initials: O
authors.lastname: Köylüoglu
authors.forename: A Almila
authors.initials: AA
authors.lastname: Tuncel
mesh_terms: D000243:Adenosine Deaminase / Q000097:blood*; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015415:Biomarkers / Q000097:blood*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011565:Psoriasis / Q000473:pathology / Q000628:therapy*
chemical_list: D015415:Biomarkers; D000243:Adenosine Deaminase