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Bone marrow-derived progenitor cells promote corneal wound healing following alkali injury

  • Juan Ye
  • Sang Yeul Lee
  • Koung Hoon KooK
  • Ke YaoEmail author
Trauma

Abstract

Purpose

To determine whether bone marrow-derived progenitor cells can be stimulated by inflammatory mediators and play a role in corneal wound healing following alkali injury.

Methods

Sixty rabbits were divided into two groups( Group I and Group II). Group I served as a bone marrow-suppression model, and received 200 mg/kg cyclophosphamide. Corneal alkali injury was created in one eye of each rabbit in each group; the other eye served as control. Three days after corneal burn, inflammatory cells in peripheral blood were counted. At the end of 4 weeks follow-up, corneas of all rabbits were subjected to histochemical examination to assess infiltrated CD34 and C-kit positive cells. Clinical outcome was determined at the end of 4 weeks.

Results

Cyclophosphamide suppressed bone marrow function in Group I by reducing cellularity by more than 30% and neutrophil distribution by 3.18 ± 1.83%. The number of bone marrow hematopoietic and mesenchymal progenitor cells were all suppressed by cyclophophamide, as demonstrated by statistically significant differences between Group I and Group II of CD34+ cells (t = −21.62, P < 0.01) and C-Kit cells (t = −21.62, P < 0.01). Fewer inflammatory cells were released into circulation in Group I (14.42 ± 5.70%) than in Group II (44.36 ± 8.64%). Clinical observation revealed that Group II rabbits had much greater reepithelization (t = 6.999, P < 0.01) and clearer corneas (X 2 = 4.417, P < 0.01) than Group I.

Conclusions

Corneal alkali injury is a stimulus that induces a rapid bone marrow reaction to release not only inflammatory cells but also progenitor cells into circulation. Migrated bone marrow-derived progenitor cells can home to local sites to promote wound healing.

Keywords

Stem cell Corneal wound healing Alkali injury 

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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Juan Ye
    • 1
    • 2
  • Sang Yeul Lee
    • 2
  • Koung Hoon KooK
    • 2
  • Ke Yao
    • 1
    Email author
  1. 1.Department of OphthalmologyThe 2nd Affiliated Hospital of Zhejiang University, College of Medicine, HangzhouZhejiangChina
  2. 2.Institute of Vision Research, Department of OphthalmologyYonsei University College of MedicineSeoulSouth Korea

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