Effect of leukotactin-1 on the protection in vivo of myeloid progenitor cells against cytotoxic chemotherapeutics

Won Y. Kim, Hal E. Broxmeyer, In Seob Han, Doo H. Park, Ki Man Lee, Dass S. Vinay, Byoung S. Kwon

Research output: Contribution to journalArticle

7 Scopus citations


Leukotactin-1 (Lkn-1) is a human CC chemokine that induces chemotaxis of neutrophils, monocytes, eosinophils, and lymphocytes and suppresses colony formation of myeloid progenitor cells in vitro. Present studies evaluated the myeloprotective capabilities of Lkn-1 in vivo against Ara-C and 5-fluorouracil (5-FU). The effect of Lkn-1 on myelopoiesis was first assessed in vivo by injecting recombinant Lkn-1 in C3H/HeJ mice. Lkn-1 rapidly decreased cycling rates and absolute numbers of myeloid progenitor cells in marrow. Lkn-1 administration prior to and during the chemotherapeutics treatment resulted in increased progenitors for colony-forming units-granulocyte/macrophage (CFU-GM), colony-forming units-granulocyte/erythroid/megakaryocyte/macrophage (CFU-GEMM), and burst-forming units-erythroid (BFU-E) compared with a saline-treated group. The protective effects lasted until day 3 after the termination of Ara-C administration and until day 7 after the termination of 5-FU administration. The results indicate that Lkn-1 protects bone marrow myeloid progenitor cells when cytotoxic chemotherapeutics are used in a preclinical setting. These results may be of use in clinical treatment for myeloprotection.

Original languageEnglish (US)
Pages (from-to)107-113
Number of pages7
JournalJournal of Hematotherapy and Stem Cell Research
Issue number1
StatePublished - Feb 1 2003

ASJC Scopus subject areas

  • Immunology
  • Hematology

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