Table IV.

TZD concentrations in plasma and in vitro

TZD In vivo/clinical  Bilayer experiments Vesicle experiments  
 Total plasma concentration Free plasma concentrationa Nominal [TZD]b [TZD]ac {TZD}mc mTZDc [TZD]ac {TZD}mc mTZDc 
 µM nM µM nM moles/cm2  nM moles/cm2  
Troglitazone 2–6.4d 2–64 80 5 × 10−13 2 × 10−3 130 9 × 10−13 4 × 10−3 
Rosiglitazone 0.4–1.7d 4–17 30 18,000 6 × 10−12 2 × 10−2 22,100 8 × 10−13 3 × 10−2 
Pioglitazone 1.5–4.4e 36 10 5,600f 2 × 10−12 10−2 6,900 3 × 10−12 10−2 
Ciglitazone 37–90g 1,900–2,700 5f 5 × 10−13 2 × 10−3 10−12 4 × 10−3 
TZD In vivo/clinical  Bilayer experiments Vesicle experiments  
 Total plasma concentration Free plasma concentrationa Nominal [TZD]b [TZD]ac {TZD}mc mTZDc [TZD]ac {TZD}mc mTZDc 
 µM nM µM nM moles/cm2  nM moles/cm2  
Troglitazone 2–6.4d 2–64 80 5 × 10−13 2 × 10−3 130 9 × 10−13 4 × 10−3 
Rosiglitazone 0.4–1.7d 4–17 30 18,000 6 × 10−12 2 × 10−2 22,100 8 × 10−13 3 × 10−2 
Pioglitazone 1.5–4.4e 36 10 5,600f 2 × 10−12 10−2 6,900 3 × 10−12 10−2 
Ciglitazone 37–90g 1,900–2,700 5f 5 × 10−13 2 × 10−3 10−12 4 × 10−3 
a

Estimated based on protein binding.

b

[TZD] where gA channel function is altered.

c

Estimated as described in Eqs. A7–A9.

d

FDA (five of the links where the information can be accessed).

e

Xue et al., 2003.

f

Based on clogP (legend to Fig. 1).

g

Torii et al., 1984, and Aleo et al., 2005; values for rats.

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