| EGFR | Epidermal growth factor receptors |
| SphK | Sphingosine kinase |
| S1P | Sphingosine-1-phosphate |
| S1PRn (n = 1–5) | Sphingosine-1-phosphate receptor |
| S1PR1 | S1P receptor 1 |
| S1PR3 | S1P receptor 3 |
| S1PR2 | S1P receptor 2 |
| S1PR4 | S1P receptor 4 |
| S1PR5 | S1P receptor 5 |
| IHC | Immunohistochemistry |
| MAPK | Mitogen-activated protein kinase |
| Erk1/2 | Extracellular signal-regulated kinase 1/2 |
| ER | Estrogen Receptor |
| Ca2+ | Calcium ions |
| TAM | Tamoxifen |
| MPA | Medroxy-progesterone acetate |
| GPR | G-protein coupled receptor |
| hTERT | human telomerase reverse transcriptase |
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