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Table 1 Inhibition of DPP-IV, -8 and -9 activity by 1,3-dihydroisoindoline derivatives 4, their metabolic clearance by rat and human and their enzyme-inducing (CYP1A, CYP2B, and CYP3A) capacity

From: Synthesis and pharmacological characterization of potent, selective, and orally bioavailable isoindoline class dipeptidyl peptidase IV inhibitors

Compound 4

R

IC50 (nM)

CL'int (L/h/Kg)

Enzyme induction (rat)

  

DPP-IV

DPP8

DPP9

Rat

Human

CYP1A

CYP2B

CYP3A

a

-H

2.3

> 100,000

> 100,000

1.3

0.2

+

+

+

b

5-Me

3.4 (28)c

59,000

> 100,000

2.3

0.1

-

-

-

c

5-F

1.9

> 100,000

> 100,000

2.6

4.8

-

+

N.T.b

d

5-Br

3.0

36,000

> 100,000

N.T.b

N.T.b

-

+

N.T.b

e

5-Cl

4.8

44,000

> 100,000

N.T.b

N.T.b

-

+

N.T.b

f

5-CF3

5.4

> 100,000

> 100,000

N.T.b

N.T.b

+

+

N.T.b

g

4-F

2.6

> 100,000

> 100,000

N.T.b

N.T.b

-

+

N.T.b

h

4-Me

4.0

> 100,000

> 100,000

N.T.b

N.T.b

-

+

N.T.b

i

4,7-diCl

2.6

> 100,000

> 100,000

N.T.b

N.T.b

+

-

N.T.b

j

5,6-diCl

22

> 100,000

74,000

N.T.b

N.T.b

+

+

N.T.b

k

4-MeO-6-Me

16

> 100,000

> 100,000

N.T.b

N.T.b

-

+

N.T.b

l

5-CH2OH

1.9a

N.T.b

N.T.b

N.T.b

N.T.b

-

-

N.T.b

  1. aIC50 determined with respect to human plasma DPP-IV in separate experiments.
  2. bNot tested.