Anti-neutrophil antibody enhances the neuroprotective effects of G-CSF by decreasing number of neutrophils in hypoxic ischemic neonatal rat model
| Autor: | Jiping Tang, Li Li, Desislava Doycheva, Richard Lee Applegate, Tiffany Hadley, John H. Zhang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Neutrophils
Severity of Illness Index Rats Sprague-Dawley Leukocyte Count Random Allocation Neonatal Granulocyte Colony-Stimulating Factor Lung biology Neutrophil Brain Granulocyte-colony stimulating factor Combined Modality Therapy Granulocyte colony-stimulating factor Stroke medicine.anatomical_structure Neuroprotective Agents Neurology 5.1 Pharmaceuticals Neurological Hypoxia-Ischemia Brain medicine.symptom Antibody Development of treatments and therapeutic interventions Granulocyte-colony stimulating factor (G-CSF) Clinical Sciences Ischemia Spleen Neuroprotection Article Antibodies lcsh:RC321-571 Neurological function Atrophy Hypoxia-Ischemia medicine Animals lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry Anti-neutrophil cytoplasmic antibody Neurology & Neurosurgery business.industry Animal Neurosciences Hypoxia–ischemia (HI) Anti-neutrophil antibody Recovery of Function medicine.disease Newborn Neutrophilia Hypoxia–ischemia Rats Brain Disorders Disease Models Animal Animals Newborn Anti-neutrophil antibody (Ab) Immunology Disease Models biology.protein Sprague-Dawley business |
| Zdroj: | Neurobiology of Disease, Vol 69, Iss, Pp 192-199 (2014) |
| Popis: | Objectives: Neonatal hypoxia ischemia (HI) is an injury that can lead to neurological impairments such as behavioral and learning disabilities. Granulocyte-colony stimulating factor (G-CSF) has been demonstrated to be neuroprotective in ischemic stroke however it has also been shown to induce neutrophilia, ultimately exacerbating neuronal injury. Our hypothesis is that coadministration of anti-neutrophil antibody (Ab) with G-CSF will decrease blood neutrophil counts thereby reducing infarct volume and improving neurological function post HI brain injury. Methods: Rat pups were subjected to unilateral carotid artery ligation followed by 2.5 h of hypoxia. Animals were randomly assigned to five groups: Sham (n = 15), vehicle (HI, n = 15), HI with G-CSF treatment (n = 15), HI with G-CSF + Ab treatment (n = 15), and HI with Ab treatment (n = 15). Ab (325 μg/kg) was administered intraperitoneally while G-CSF (50 μg/kg) was administered subcutaneously 1 h post HI followed by daily injections for 3 consecutive days. Animals were euthanized at 96 h post HI for blood neutrophil counts and brain infarct volume measurements as well as at 5 weeks for neurological function testing and brain weight measurements. Lung and spleen weights at both time points were further analyzed. Results: The G-CSF treatment group showed tendencies to reduce infarct volume and improve neurological function while significantly increasing neutrophil counts. On the other hand, the G-CSF + Ab group significantly reduced infarct volume, improved neurological function and decreased neutrophil counts. The Ab alone group showed reversal of the neuroprotective effects of the G-CSF + Ab group. No significant differences were found in peripheral organ weights between groups. Conclusion: Our data suggest that coadministration of G-CSF with Ab not only prevented brain atrophy but also significantly improved neurological function by decreasing blood neutrophil counts. Hence the neuroprotective effects of G-CSF may be further enhanced if neutrophilia is avoided. |
| Databáze: | OpenAIRE |
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