BAFF	B-cell activating factor
BALF	Bronchoalveolar lavage fluid
BOS	Bronchiolitis obliterans syndrome
CCL	C-C Motif Chemokine Ligand
CD	Cluster of differentiation
CF	Cystic Fibrosis
CLAD	Chronic lung allograft dysfunction
COPD	Chronic obstructive pulmonary disease
CS	Cigarette smoke
CXCL-8	C-X-C motif chemokine ligand 8
DC-SIGN	Dendritic cell specific ICAM-3 grabbing nonintegrin
d-IgA	Dimeric IgA
DLL4	Delta-like canonical ligand 4
ECP	Eosinophil cationic protein
EDN	Eosinophil-derived neurotoxin
EPO	Eosinophil peroxydase
Fab	Antigen-binding fragment
Fc	Antigen crystallizable fragment
FcαRI	Fc receptor for IgA
FEV	Forced expiratory volume
FVC	Forced vital capacity
IFN	Interferon
IFN-γ	Interferon γ
Ig	Immunoglobulin
IgA	Immunoglobulin A
IgG	Immunoglobulin G
IgM	Immunoglobulin M
IL-1	Interleukin 1
IL-4	Interleukin 4
IL-8	Interleukin 8
IRF-1	IFN regulatory factor 1
J chain	Joining chain
LT	Lung transplantation
MALT	Mucosa-associated lymphoid tissue
MAMP	Microbe-associated molecular pattern
MEF	Maximal expiratory flow
m-IgA	Monomeric IgA
NF-κB	Nuclear Factor κB
Pa	Pseudomonas aeruginosa
p-IgA	Polymeric IgA
pIgR	Polymeric immunoglobulin receptor
RAS	Restrictive allograft syndrome
RNA	Ribonucleic acid
SC	Secretory component
S-IgA	Secretory IgA
STAT6	Signal transducer and activator of transcription 6
TGF-β	Transforming growth factor β
TLR	Toll-like receptor
TNF-α	Tumour necrosis factor α
Treg	Regulatory T cell