Skip to main content

Table 1 Single-node resistance mechanisms to PI3K inhibitors ordered by their effect on Apoptosis

From: A network modeling approach to elucidate drug resistance mechanisms and predict combinatorial drug treatments in breast cancer

Perturbation

Apoptosisnorm

Proliferationnorm

Mechanism

PI3K = 1,2; PIP3 = 1,2

0.00

0.50

PI3K

AKT = 1

0.00

0.50

AKT

HER2/HER3 = 2

0.00

0.50

RTK

PIM = 1

0.00

0.50

AKT

MAPK = 1

0.25

0.25

MAPK

MAPK = 2

0.00

0.25

MAPK

BIM = 0

0.25

0.25

Apoptosis

BAD = 0

0.25

0.25

Apoptosis

SGK1 = 1

0.25

0.25

AKT

FOXO3 = 0, FOXO3_Ub = 1

0.33

0.13

AKT

mTORC1 = 1

0.38

0.50

mTORC1

translation = 1

0.38

0.50

mTORC1

TSC = 0

0.38

0.50

mTORC1

PRAS40 = 0

0.38

0.50

mTORC1

MCL1 = 1

0.38

0.25

Apoptosis

BCL2 = 1

0.50

0.25

Apoptosis

pRb = 3

0.70

0.50

Proliferation

E2F = 3

0.70

0.50

Proliferation

cycE_CDK2 = 1

0.70

0.50

Proliferation

p21_p27 = 0

0.70

0.49

Proliferation

  1. The sustained state indicated in the first column yields a decrease in Apoptosisnorm from 0.7 and/or an increase in Proliferationnorm from 0.25, which are the activities of these nodes with only PI3K inhibition. Certain node perturbations that are equivalent in the network sense and lead to the same effect are grouped; specifically, PIP3 = 1 or 2 with PI3K = 1 or 2; FOXO3_Ub = ON with FOXO3 = OFF