Abstract:
:Neutrophil apoptosis is a constitutive process that can be enhanced or delayed by various stimuli. In this study, the effect of brefeldin A (BFA), which affects the biological process of secretion, on constitutive and delayed apoptosis of neutrophils was investigated. Neutrophil apoptosis was determined after culturing for 20 h in vitro by morphological changes, annexin V staining, and DNA electrophoresis. BFA dose-dependently increased the constitutive apoptotic rate of neutrophils. The delay of apoptosis induced by granulocyte-macrophage colony-stimulating factor (GM-CSF) and lipopolysaccharide (LPS) was also blocked by BFA. However, this effect of BFA was less marked when neutrophils were treated with dexamethasone, interleukin-8 (IL-8), or dibutyryl cAMP (dbcAMP). Moreover, the delay of neutrophil apoptosis induced by rottlerin, a specific inhibitor of protein kinase C (PKC)-delta, was significantly abrogated by BFA. Although BFA-induced apoptosis was not blocked by the caspase-3 inhibitor, zDEVD-fmk, myeloid cell leukemia-1 (Mcl-1) expression levels were downregulated by BFA. These results suggest that derangement of vesicular protein transport may be involved in the apoptosis of neutrophils, and that the action of BFA on apoptosis is dependent on changes in the expression of Mcl-1.
journal_name
Int Immunopharmacoljournal_title
International immunopharmacologyauthors
Lee MJ,Park JY,Lee SY,Lee JS,Jung DK,Bae YS,Kwak JYdoi
10.1016/S1567-5769(03)00052-3keywords:
subject
Has Abstractpub_date
2003-06-01 00:00:00pages
835-43issue
6eissn
1567-5769issn
1878-1705pii
S1567-5769(03)00052-3journal_volume
3pub_type
杂志文章abstract::Distinct effect of ent-Kaurene Diterpenoids from Isodon serra on abnormal proliferation of murine lymphocytes was examined with MTT assay and Flow Cytometry Analyses (FCAS). After choosing the most appropriate monomer from these Diterpenoids, we introduced mouse tumescence model to investigate whether it could impact ...
journal_title:International immunopharmacology
pub_type: 杂志文章
doi:10.1016/j.intimp.2005.06.016
更新日期:2005-12-01 00:00:00
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journal_title:International immunopharmacology
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journal_title:International immunopharmacology
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doi:10.1016/j.intimp.2008.07.006
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journal_title:International immunopharmacology
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journal_title:International immunopharmacology
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pub_type: 临床试验,杂志文章,随机对照试验
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