These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Lisofylline inhibits transforming growth factor beta release and enhances trilineage hematopoietic recovery after 5-fluorouracil treatment in mice.
    Author: Clarke E, Rice GC, Weeks RS, Jenkins N, Nelson R, Bianco JA, Singer JW.
    Journal: Cancer Res; 1996 Jan 01; 56(1):105-12. PubMed ID: 8548748.
    Abstract:
    The effectiveness of endogenous or exogenously administered colony-stimulating factors may be modulated by the presence of hematopoietic inhibitory molecules. Cytotoxic therapy may result in the induction of hematopoietic inhibitors contributing to prolonged myelosuppression, whereas preventing the induction of such inhibitors may accelerate multilineage recovery. Lisofylline [LSF; (R)-1-(5-hydroxyhexyl)-3,7, dimethyl-xanthine], inhibits the signaling and/or release of certain hematopoietic inhibitory molecules such as tumor necrosis factor alpha, macrophage inflammatory protein 1 alpha, transforming growth factor beta, and IFN-gamma. Treatment of murine bone marrow cells with the cytotoxic agent 5-fluorouracil (5-FU) results in the release of a nondialyzable inhibitor of progenitor (colony-forming unit-granulocyte macrophage; CFU-GM) proliferation. When murine bone marrow cells were treated with 5-FU plus LSF, release of this inhibitor of CFU-GM proliferation was blocked. Neutralizing antibody and Western blot analysis indicated that the inhibitor was TGF-beta. We tested the effect of LSF (100 mg/kg i.p., b.i.d.) on multilineage regeneration after high-dose 5-FU or thiotepa treatment in BALB/c mice. In 4 of 5 experiments, LSF significantly accelerated neutrophil recovery (P < or = 0.05, Wilcoxon paired-signed test). In addition, platelet, reticulocyte, and CFU-GM regeneration were significantly accelerated in mice treated with LSF compared to control mice (P < or = 0.05). LSF had no significant effects on the ability of 5-FU to kill hematopoietic progenitor cells, nor did LSF stimulate or inhibit proliferation of CFU-GM. LSF had no effect on chemotherapy-induced killing of tumor cells in vitro, nor on the antitumor activity of 5-FU or thiotepa in BALB/c mice implanted with P388 leukemia cells. Inhibition of hematopoietic inhibitor release may accelerate multilineage recovery after cytotoxic therapy and, as such, may represent an alternative or additional therapy to the use of positively acting lineage specific colony-stimulating factors.
    [Abstract] [Full Text] [Related] [New Search]