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Review of UCN‐01 Development: A Lesson in the Importance of Clinical Pharmacology
Author(s) -
Fuse Eiichi,
Kuwabara Takashi,
Sparreboom Alex,
Sausville Edward A.,
Figg William D.
Publication year - 2005
Publication title -
the journal of clinical pharmacology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 116
eISSN - 1552-4604
pISSN - 0091-2700
DOI - 10.1177/0091270005274549
Subject(s) - clinical pharmacology , pharmacology , medicine
UCN‐01 is a protein kinase inhibitor under development as a novel anticancer drug. The initial pharmacologic features in patients were not predicted from preclinical experiments. The distribution volume and the systemic clearance were much lower than those in experimental animals (mice, rats, and dogs), and the elimination half‐life was unusually long (>200 hours). The unbound fraction in human plasma was also much smaller than that in dogs, rats and mice, as was the binding of UCN‐01 to human alpha‐1 acid glycoprotein much stronger than that to human serum albumin or human γ‐globulin. The association constants for alpha‐1 acid glycoprotein and human plasma were approximately 8 × 10 8 (mol/L) −1 , indicating extremely high affinity. In this review article, the authors discuss the pharmacologic features of UCN‐01 across species and provide a perspective on how this information could be applied prospectively to the future development of this agent.