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The relationship between humoral stimulating activity and colony stimulating factor
Experimental Hematology
|August 1, 1983
Summary
Humoral stimulatory activity (HSA) in neutropenic patients is linked to colony-stimulating factors (CSF). This study shows drug-induced HSA in humans and rodents cross-reacts with CSF, suggesting a shared mechanism.
Area of Science:
- Hematology
- Immunology
- Pharmacology
Background:
- Humoral stimulatory activity (HSA) is observed in neutropenic individuals.
- Colony-stimulating activity (CSA) is also elevated in these patients.
- The relationship between HSA and CSA remains unclear.
Purpose of the Study:
- To investigate the relationship between drug-induced HSA and CSF.
- To determine if HSA and CSF share cross-reactive properties.
Main Methods:
- Sera from cyclophosphamide-treated mice, rats, and humans were analyzed.
- Sera were incubated with antiserum against mouse L-cell CSF.
- Effects on marrow cell [3H] TdR incorporation and granulocyte colony formation were measured.
Main Results:
- Antiserum against CSF neutralized HSA in rodent and human sera.
- Neutralization was dose-dependent and specific.
- Human HSA effects on proliferation correlated with granulocyte colony formation.
Conclusions:
- Drug-induced HSA in humans and rodents is cross-reactive with CSF.
- This cross-reactivity can be detected using a simple proliferation assay.
- HSA and CSF likely share common antigenic determinants or functional pathways.