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Table 6 Mean individual pharmacodynamic parameters and confidence intervals for IFNs alpha-2b and gamma

From: Pharmacokinetic and pharmacodynamic characterization of a novel formulation containing co-formulated interferons alpha-2b and gamma in healthy male volunteers

Parameter (units)

IFN alpha-2b

IFN gamma

Mean

95 % CI

Mean

95 % CI

Neopterin

 Smax

25.8

25.2–26.4

16.7

15.8–17.6

 SC50 (pg/mL)

15.5

14.8–16.1

19.5

13.8–25.3

 kin (h−1)

0.027

0.024–0.030

0.03

0.026–0.034

 kout (h−1)

0.022

0.022–0.022

0.0247

0.0247–0.0248

β2-microglobulin

 Smax

1.03

0.95–1.1

4.5

3.81–5.1

 SC50 (pg/mL)

0.31

0.03–0.58

76.4

37.2–115.7

 kin (h−1)

0.141

0.133–0.149

0.04

0.033–0.038

 kout (h−1)

0.070

0.067–0.073

0.0194

0.0190–0.0198

2′–5′ oligoadenylate synthetase

 S0 (ng/mL)

33.9

14.5–53.3

762

721–803

 Smax

25.8

10.6–41.0

104

39–169

 SC50 (pg/mL)

419

392–446

730

394–1066

 kin (h−1)

1990

1754–2226

237

188–285

 kout (h−1)

28.20

14.21–42.18

17.7

6.2–29.1

Body temperature

 S0 (°C)

35.9

35.9–35.9

36.2

36.0–36.2

 Smax

9.7

9.5–9.8

7.2

6.7–7.6

 SC50 (pg/mL)

252

239–264

374

254–493

 kin (h−1)

0.864

0.858–0.870

0.851

0.848–0.855

 kout (h−1)

1.0155

1.015–1.016

1.021

1.021–1.021

  1. S 0 baseline response, S max maximum stimulatory factor attributed to drug, SC50: drug concentration producing 50 % of maximum stimulation, k in the zero order rate constant for the production of response, k out the first order rate constant for loss of response