The effect of continuous G-CSF application in human cyclic neutropenia: a model analysis
| Autor: | Stephan Schmitz, Horst Franke, Volker Diehl, H.-Erich Wichmann |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
medicine.medical_specialty
Periodicity Neutropenia Time Factors medicine.medical_treatment Granulopoiesis Models Biological Drug Administration Schedule Cyclic neutropenia Internal medicine Granulocyte Colony-Stimulating Factor medicine Humans Computer Simulation Severe neutropenia Leukopenia Dose-Response Relationship Drug business.industry Cell Cycle Hematology medicine.disease Granulocyte colony-stimulating factor Hematopoiesis Endocrinology medicine.anatomical_structure Cytokine Bone marrow medicine.symptom business |
| Zdroj: | British journal of haematology. 90(1) |
| ISSN: | 0007-1048 |
| Popis: | Human cyclic neutropenia (CN) is a rare haematological disorder characterized by oscillations of blood neutrophils at subnormal levels with a stable period of approximately 21 d. During the phase of severe neutropenia (neutrophils < 250 cells/microliters), which last 4-10 d, the patients are endangered by serious infections. Several authors report that continuous G-CSF application can elevate the blood neutrophils to such a level that the risk of infections is significantly reduced. Although the characteristic cycles are not eliminated by G-CSF, the period of the oscillations is shortened to 12-14 d. Based on a previously proposed computer-simulation model of human CN, the effects of continuous G-CSF application on CN are studied. It is shown how the known different cell-kinetic effects of G-CSF on granulopoiesis explain the clinical data in CN. The reduced length of the cycles emerges as a result of the transit time reduction of the post-mitotic granulopoietic cells by G-CSF. The measured increase of the neutrophil maxima is reproduced by the additional mitoses of the immature granulopoietic bone marrow cells induced by G-CSF. The slight elevation of the neutrophil nadirs can be attributed to a weak effect of G-CSF on the assumed underlying defect in CN (an abnormally small variance of the granulopoietic bone-marrow transit time). |
| Databáze: | OpenAIRE |
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