Table 2 Dose-limiting toxicities in dose-escalation cohorts

From: A phase Ib study of entinostat plus lapatinib with or without trastuzumab in patients with HER2-positive metastatic breast cancer that progressed during trastuzumab treatment

 

Cohort

Entinostat dose every other week (mg)

Lapatinib once daily (mg)

Trastuzumab every 3 weeks (mg/kg)

Patients, n

Patients with DLT, n

DLT(s)

Dose level

1

5

1250

NA

3

0

 
 

2

8

1250

NA

3

0

 
 

3

10

1250

NA

3

0

 
 

4

12

1250

NA

3

0

*

 

5

15

1250

NA

2

0

 
 

6

12

1000

8->6

6

1

Hypokalaemia

 

7

15

1000

8->6

5

2

Thrombocytopenia, diarrhoea

Expansion

6

12

1000

8->6

10

1

Diarrhoea

  1. DLT dose-limiting toxicity, NA not applicable. *One patient from cohort 4 withdrew after confirmation of negative HER2 status but did not have DLT, and the next patient was accrued to the next dose level cohort