期刊
IMMUNOBIOLOGY
卷 217, 期 3, 页码 345-353出版社
ELSEVIER GMBH
DOI: 10.1016/j.imbio.2011.07.013
关键词
Systemic inflammation; Non-neuronal components of cholinergic system; Caspases; NE kappa B pathway
类别
资金
- Italian National Research Council (CNR)
- Boehringer Ingelheim Pharma GmbH & Co. KG, Germany [43018230]
Novel pharmacological strategies are aimed at the resolution of systemic inflammation in COPD potentiating peripheral blood T-cell (PBT-cell) apoptosis. Although muscarinic acetylcholine receptors (mAChRs) M-3 and choline-acetyltransferase (ChAT) participate in the airway inflammation of COPD, their role in NIT-cell apoptosis remains unexplained. We evaluated in PBT-cells from COPD patients, smoker (S) and control (C) subjects: (1) apoptosis (by annexin V binding), (2) mAChR M-3 and ChAT expression, acetylcholine (ACh)-binding; (3) choline levels in serum and PBT-cells extracts. We tested the effects of Tiotropium (Spiriva (R)) and hemicholinium-3 (HCh-3) on apoptosis, NF kappa B pathway, caspases 3 and 8 activity and choline levels, in PBT-cells from COPD patients. We showed that: (1) apoptosis, mAChR M3 and ChAT expression and the CD3+ and CD8+ ACh-binding are increased in PBT-cells from COPD patients when compared to C subjects, while CD4+/CD8+ ratio of ACh-binding to PBT cells was reduced in COPD; (2) choline levels are higher in serum and PBT-cells extracts from COPD patients than in S and C; (3) Tiotropium and HCh-3 reduced CD4+ and increased CD8+ apoptosis via caspases 3 and 8 activities and via I kappa B mediated mechanisms in COPD patients. This study suggests the involvement of non-neuronal components of cholinergic system in the regulation of PBT-cell apoptosis in COPD and demonstrates that Tiotropium regulates CD4+ and CD8+ PBT-cell apoptosis. It provides novel putative pharmacological targets for the resolution of systemic inflammation in COPD. (C) 2011 Elsevier GmbH. All rights reserved.
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