| CLDN | Claudin |
| Ct | Threshold cycle |
| FBS | Fetal bovine serum |
| EBGP | Ethanol extract of Brazilian green propolis |
| H2DCFDA | 2′,7′-Dichlorodihydrofluorescein diacetate |
| H2O2 | Hydrogen peroxide |
| LY | Lucifer yellow |
| MβCD | Methyl-β-cyclodextrin |
| MDC | Monodansylcadaverine |
| p-Ser | Phosphoserine |
| p-Thr | Phosphothreonine |
| PCR | Polymerase chain reaction |
| PDZ | PSD95/Dlg/ZO-1 |
| PMA | Phorbol 12-myristate 13-acetate |
| pNPP | Paranitrophenylphosphate |
| PPs | Protein phosphatases |
| ROS | Reactive oxygen species |
| SDS-PAGE | SDS-polyacrylamide gel electrophoresis |
| siRNA | Small interfering RNA |
| TER | Transepithelial electrical resistance |
| TJ | Tight junction |
| UV | Ultraviolet |
| WST-1 | 2-(4-Iodophenyl)-3-(4-nitrophenyl)-5-(2,4-disulfophenyl)-2H-tetrazolium |
| WT | Wild-type |