Table 2 Impact of erlotinib (E) and combinatorial treatments (ET, EP, TP, TPE) on long-term signaling in SKBR3 cells and HCC1954 cells (Figure 4)

From: Strong EGFR signaling in cell line models of ERBB2-amplified breast cancer attenuates response towards ERBB2-targeting drugs

Cell line

SKBR3

HCC1954

 

pRPS6

pRB

pRPS6

pRB

Hours

12

24

12

24

12

24

12

24

Control

64.6

28.6

87.0

93.7

43.8

12.6

59.9

42.2

E

19.5

13.0

46.9

46.6

12.4

0.7

36.4

10.6

ET

3.1

0

50.4

14.3

8.5

0.4

37.3

8.6

EP

53.4

10.4

70.0

26.8

14.1

0

37.1

4.4

TP

59.0

5.7

78.2

77.7

96.5

20.5

100.0

65.3

TPE

12.5

0.1

74.7

57.6

21.2

3.9

51.2

18.2

  1. Abbreviations: E, erlotinib; EP, erlotinib+pertuzumab; ET, erlotinib+trastuzumab; P, pertuzumab; T, trastuzumab; TP, trastuzumab+pertuzumab; TPE, trastuzumab+pertuzumab+erlotinib.
  2. Scales ranging 0–100% were generated target protein-specific. Maximal readings of normalized fluorescent intensities of a certain time course were set to equal 100% and the minimum was set to equal 0%.