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Related Experiment Videos

Hematopoietic augmentation by a beta-(1,4)-linked mannan

S F Egger1, G S Brown, L S Kelsey

  • 1Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha 68198-5660, USA.

Cancer Immunology, Immunotherapy : CII
|December 1, 1996
PubMed
Summary
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CARN 750, derived from Aloe barbadensis, significantly boosts blood cell production and hematopoietic progenitors in mice. This acemannan compound shows greater efficacy than G-CSF in restoring blood cell counts after myelosuppression.

Area of Science:

  • Biochemistry
  • Immunology
  • Hematology

Background:

  • Acemannan (CARN 750) from Aloe barbadensis exhibits diverse therapeutic properties, including wound repair and anti-neoplastic activity.
  • CARN 750 is known to activate macrophages, suggesting immunomodulatory functions.
  • Its potential hematoaugmenting properties have not been fully elucidated.

Purpose of the Study:

  • To investigate the hematoaugmenting effects of CARN 750 in a mouse model of myelosuppression.
  • To compare the efficacy of CARN 750 with granulocyte-colony-stimulating factor (G-CSF) in restoring hematopoietic parameters.

Main Methods:

  • Subcutaneous administration of CARN 750 to myelosuppressed (7 Gy irradiation) C57BL/6 mice.
  • Assessment of splenic and peripheral blood cellularity.

Related Experiment Videos

  • Quantification of hematopoietic progenitors using interleukin-3-responsive CFU assays and high-proliferative-potential colony-forming-cell (HPP-CFC) assays.
  • Comparative study with G-CSF treatment.

    • Main Results:

    • CARN 750 significantly increased splenic and peripheral blood cellularity and hematopoietic progenitors in bone marrow and spleen.
    • Optimal hematoaugmenting effects were observed at a dose of 1 mg CARN 750/animal following sublethal irradiation.
    • CARN 750 demonstrated equal or superior efficacy to G-CSF in increasing cellularity and HPP-CFCs, with broader activity across multiple cell lineages (PMN, lymphocytes, monocytes, platelets).

    Conclusions:

    • CARN 750 possesses significant hematoaugmenting properties, effectively stimulating hematopoiesis in myelosuppressed mice.
    • CARN 750 exhibits a broader spectrum of hematopoietic stimulation compared to G-CSF, impacting multiple cell lineages.
    • These findings highlight CARN 750 as a promising agent for managing myelosuppression and related conditions.