cell population | abbreviation | description | cell diameter (μm) | cell volume (pL) | number of colonies in soft agar | tumor size (mm2) in BALB/c nu/nu | cell doubling time (h) |
---|---|---|---|---|---|---|---|
Primary MEF | Prim-MEF | Isolated from 12–14.5 day-old embyos | 16.3 ± 1.0 (3) | 2.6 ± 0.5 (3) | none | n.a. | 20.5 ± 0.7 (6) |
Immortalized MEF (spontaneous) | Imm-MEF | Senescence bypass (3T3 passaging) | 16.5 ± 0.7 (3) | 2.7 ± 0.3 (3) | none | n.a. | 24.1 ± 1.1 (6) |
Immortalized MEF (TBX2) | TBX2-MEF | Retroviral transducton TBX2 gene | 15.5 ± 0.3 (4) | 2.1 ± 0.1 (4) | none | n.a. | 19.9 ± 0.9 (6) |
RasV12/E1A MEF (low passage) | RAS-LP | Retroviral transducton E1A/RasV12 | 11.0 ± 1.0 ** (4) | 0.82 ± 0.2 ** (4) | 131 ± 68 (5) | 131 ± 62 (9) | 16.8 ± 1.6 # (6) |
RasV12/E1A MEF (high passage) | RAS-HP | Retroviral transducton E1A/RasV12 | 10.1 ± 0.4 *** (4) | 0.58 ± 0.1 *** (4) | 880 ± 164 †† (5) | 497 ± 182 † (9) | 12.2 ± 0.7*** ‡ (8) |
RasV12/E1A MEF (tumor) | Ras-TUM | RAS-HP passage in BALB/c nu/nu mice | 10.5 ± 0.3 *** (3) | 0.65 ± 0.1 *** (3) | 705 ± 146 †† (7) | n.a. | 15.0 ± 1.0 ** (7) |