AIDS	Acquired immune deficiency syndrome
AC	Adenylate cyclase
BALF	Broncho-alveolar lung fluid
BM-MSCs	Bone marrow-mesenchymal stem cells
CC16	Club cell-16
CDK9	Cyclin-dependent kinase 9
COPD	Chronic obstructive pulmonary disease
CS	Cigarette smoke
CSE	Cigarette smoke extract
CT	Computed tomography
DAMPs	Damage-associated molecular patterns
DPPIV	Dipeptidyl peptidase-4
ECLIPSE	Evaluation of COPD Longitudinally to Identify Predictive Surrogate End-points
ECM	Extracellular matrix
EPCs	Endothelial progenitor cells
FDA	Food and drug administration
FEV1	Forced expiratory volume in one second
FEV1/FVC FLAME	Forced expiratory volume in one second/forced volume vital capacity EFfect of Indacaterol Glycopyronium Vs Fluticasone Salmeterol on COPD Exacerbations
GAGs	Glycosaminoglycans
GDP	Guanosine-5′-diphosphate
GPCRs	G-protein coupled receptors
GTP	Guanosine-5′-triphosphate
16-HBE	16-human bronchial epithelial cells
HMGB1	High mobility group box 1 protein
HIV	Human immunodeficiency virus
HPCs	Hematopoietic progenitor cells
IFN-γ IMPACT	Interferon-γ InforMing the PAthway of COPD Treatment
IRF3	IFN regulatory factor III
IL	Interleukine
IP3	Inositol trisphosphate
JAK/STAT	Janus kinase/signaling transducer and activator of transcription
kDa	kilo Daltons
LPS	Lipopolysaccharide
MAPK/Erk	Mitogen activated protein kinase/extracellular signal-regulated kinase
MCP-1	Monocyte chemotactic protein 1
MMP	Matrix metalloproteinase
PBMC	Peripheral blood mononucleated cells
PI3K	Phosphoinositide 3-kinase
PKC	Protein kinase C
PLC	Phosphoinositide-specific phospholipase C
PPE	Porcine pancreatic elastase
PRRs	Pattern recognition receptors
SNP	Single nucleotide polymorphism
SP-D	Surfactant protein D
sRAGE SUMMIT	Soluble receptor for advanced glycation end-products Study to Understand Mortality and Morbidity in COPD
TNF-α TORCH	Tumor necrosis factor-α TOwards a Revolution in COPD Health
TSG-6 UPLIFT	TNF-stimulated gene/protein-6 Understanding Potential Long-term Impacts on Function with Tiotropium
VEGF	Vascular endothelial growth factor