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Related Experiment Videos

The suppressor factor NBxFO is not species-specific.

B E Barton1

  • 1Department of Medicine, Stanford University Medical Center, CA 94305.

Developmental and Comparative Immunology
|January 1, 1989
PubMed
Summary

The NBxFO factor, derived from neonatal spleen cells, inhibits mixed lymphocyte reactions (MLR) across multiple species, including humans and rats. This non-species-specific immune-modulating factor also suppresses lectin-induced lymphocyte proliferation.

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Area of Science:

  • Immunology
  • Cell Biology

Background:

  • Neonatal spleen-myeloma fusions yield factors with immunomodulatory potential.
  • Previous studies identified NBxFO factor's ability to inhibit T cell line proliferation.

Purpose of the Study:

  • To investigate the species-specificity of the NBxFO factor's inhibitory activity.
  • To determine if NBxFO factor affects lectin-induced lymphocyte proliferation.

Main Methods:

  • Obtaining NBxFO factor from neonatal spleen:myeloma fusion supernatants.
  • Assessing NBxFO factor's effect on mixed lymphocyte reactions (MLR) in mice, humans, and rats.
  • Evaluating NBxFO factor's impact on lectin-induced mitogenesis.
  • Utilizing gel chromatography to determine molecular weight.

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Main Results:

  • NBxFO factor demonstrated inhibitory activity on MLR in mice, humans, and rats, indicating non-species-specific effects.
  • The factor also inhibited lectin-induced mitogenesis in these species.
  • Gel chromatography confirmed the molecular weight of the human lymphocyte mitogenesis suppressor is consistent with that of the mouse suppressor.

Conclusions:

  • The NBxFO factor exhibits broad-spectrum immunosuppressive activity across different mammalian species.
  • The molecular basis for NBxFO factor's inhibitory function appears conserved across species.