Abstract：
:Ustekinumab, a human immunoglobulin G1 kappa (IgG1k) monoclonal antibody that binds with high affinity to human interleukin-12 and interleukin-23, has demonstrated efficacy in patients with psoriasis. The objective of this study was to perform exposure-response modeling to increase the understanding of reduction in disease severity following treatment with ustekinumab in patients with moderate to severe psoriasis who participate in two phase III studies (PHOENIX 1 and PHOENIX 2). Patients were randomly assigned to receive ustekinumab 45 mg or 90 mg (n = 1312; 11,624 Psoriasis Area and Severity Index [PASI] scores) or placebo (n = 665; 3278 PASI scores). Disease severity was assessed using PASI scores. A population mechanism-based exposure-response model of ustekinumab using NONMEM was developed using serum ustekinumab concentrations and PASI scores. The pharmacodynamic response effect was the reduction in PASI score. The placebo effect, although minor, was also integrated into the model. None of the covariate factors evaluated (eg, demographics, baseline disease characteristics, comorbidities) significantly contributed to the between-subject variability in the pharmacodynamic parameters. The developed exposure-response model can serve as a basis to support future alternative dosing regimens for ustekinumab in patients with moderate to severe plaque psoriasis. A robust exposure-response relationship has been confirmed for ustekinumab in psoriasis.
journal_name
J Clin Pharmacoljournal_title
Journal of clinical pharmacologyauthors
Zhou H,Hu C,Zhu Y,Lu M,Liao S,Yeilding N,Davis HMdoi
10.1177/0091270009343695subject
Has Abstractpub_date
2010-03-01 00:00:00pages
257-67issue
3eissn
0091-2700issn
1552-4604pii
0091270009343695journal_volume
50pub_type
杂志文章,多中心研究,随机对照试验abstract：:Although physiologic modeling has not gained the widespread acceptance that was originally projected, it may serve as the basis for future PK/PD modeling approaches. In addition, with more effort applied to developing in vitro and animal-to-human predictions, physiologic modeling may assume a higher position in the ph...
journal_title：Journal of clinical pharmacology
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