| Abs | antibodies |
| APC | antigenic-presenting cell |
| BAL | bronchoalveolar lavage |
| BSA | bovine serum albumin |
| HDM | high-density macrophage |
| LDM | low-density macrophage |
| LDN | low-density neutrophils |
| LPS | lipopolysaccharide |
| NDN | normal-density neutrophil |
| PBS | phosphate-buffered saline |
| PIPES | piperazine-1,4-bis (2-ethanesulfonic acid) |
| TLR4 | toll-like receptor 4 |