Journal of Gastroenterology

, Volume 41, Issue 6, pp 524–532

Activated platelets as a possible early marker to predict clinical efficacy of leukocytapheresis in severe ulcerative colitis patients

  • Ken Fukunaga
  • Yoshihiro Fukuda
  • Yoko Yokoyama
  • Kunio Ohnishi
  • Takeshi Kusaka
  • Tadashi Kosaka
  • Nobuyuki Hida
  • Yoshio Ohda
  • Hiroto Miwa
  • Takayuki Matsumoto
Article

Abstract

Background

Leukocytapheresis (LCAP) is an effective adjunct for patients with active ulcerative colitis (UC). Because LCAP may have the potential to remove and modulate not only leukocytes but also platelets, we evaluated the correlation between activated platelets and the therapeutic response to LCAP.

Methods

Fourteen patients with severe UC received weekly LCAP for 5 consecutive weeks. Their average clinical activity index (CAI) and endoscopic index (EI) were 9.6 ± 3.4 and 10.9 ± 1.0, respectively. Their peripheral blood was sampled before and after every LCAP and stained with fluorescent antibodies to the activation-dependent surface antigens of platelets (CD63, CD62-P) prior to flow cytometry. Endoscopic evaluations were performed after the last LCAP.

Results

Clinical remission (CAI < 4) was induced in 50% of the patients (7/14) after 5 weeks, and there were no significant differences observed in clinical background between the responder group (RG) and the nonresponder group (NG). In the RG, the populations of CD63+ (P < 0.03) and CD62-P+ (P < 0.05) platelets were significantly decreased after the first LCAP, and their reduction ratio decreased gradually with repeated LCAP. A significant improvement of the EI score, especially mucosal damage, was achieved in RG (P < 0.04) but not in NG.

Conclusions

These results indicate that the therapeutic responses to LCAP were reflected in modulations of population and/or platelet functions, especially after the first session. The decrease of such activated platelets immediately after the first LCAP may be an early marker for predicting the response in patients with severe UC.

Key words

ulcerative colitis platelets P-selectin leukocytapheresis inflammatory bowel disease 

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Copyright information

© Springer-Verlag Tokyo 2006

Authors and Affiliations

  • Ken Fukunaga
    • 1
  • Yoshihiro Fukuda
    • 1
  • Yoko Yokoyama
    • 1
  • Kunio Ohnishi
    • 1
  • Takeshi Kusaka
    • 1
  • Tadashi Kosaka
    • 1
  • Nobuyuki Hida
    • 1
  • Yoshio Ohda
    • 1
  • Hiroto Miwa
    • 2
  • Takayuki Matsumoto
    • 1
  1. 1.Division of Lower Gastroenterology, Department of Internal MedicineHyogo College of MedicineNishinomiyaJapan
  2. 2.Division of Upper Gastroenterology, Department of Internal MedicineHyogo College of MedicineNishinomiyaJapan

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