Mechanism | Phenotype | Assessment |
---|---|---|
Inherent resistance | ER negativity | ER measurement |
 | Defective ER | ER read-outs |
 | Alternative growth signalling | GF/receptor assays |
ER modified | ER phosphorylation | Phosphorylation status |
 | ER co-activators | ER read-outs |
 | ER co-repressors |  |
Ineffective treatment | Inherent lack of potency | Target read-outs |
 | Compensatory mechanisms | Target read-outs |
 | Poor pharmacokinetics | Pharmacogenetics |