PMID- 23829943 OWN - NLM STAT- MEDLINE DCOM- 20140505 LR - 20211021 IS - 1756-8722 (Electronic) IS - 1756-8722 (Linking) VI - 6 DP - 2013 Jul 8 TI - A phase I study of ridaforolimus in adult Chinese patients with advanced solid tumors. PG - 48 LID - 10.1186/1756-8722-6-48 [doi] AB - PURPOSE: Ridaforolimus (AP23573, MK-8669 or deforolimus) is an inhibitor of mammalian target of rapamycin (mTOR), an important regulator in the cell survival pathway. This open-label, single center phase I study aimed to investigate the pharmacokinetic (PK) and safety profiles of ridaforolimus in Chinese patients with treatment-refractory advanced or relapsed solid tumors. The PK data generated from these Chinese patients were further compared with those previously reported in Caucasian and Japanese patient populations. EXPERIMENTAL DESIGN: The patients were given an oral dose of 40 mg of ridaforolimus on Day 1 of the study. On Day 8, patients were initiated on a treatment regimen that comprised a once daily dose of 40 mg of ridaforolimus for five consecutive days, followed by a 2-day off-drug interval. Patients repeated this regimen until disease progression or intolerance. Blood samples were collected at specific times pre- and post-treatment to establish the PK profile of ridaforolimus in all patients. RESULTS: Fifteen patients were given at least one dose of 40 mg of ridaforolimus. The median absorption lag-time was 2 hours, the median Tmax was 4 hours and the mean elimination half-life was 53 hours. The accumulation ratio for AUC(0-24hr) was 1.3 on day 19 (steady state)/day 1 (after a single dose). The most common drug-related adverse events (AEs) that occurred in >/=40% of patients were stomatitis, proteinuria, leukopenia, hyperglycemia, and pyrexia. Grade 3/4 drug-related AEs were anemia, stomatitis, fatigue, thrombocytopenia, constipation, gamma glutamyltransferase increase, and proteinuria. All 11 evaluable patients achieved stable disease. CONCLUSIONS: Oral ridaforolimus at a daily dose of 40 mg were generally well tolerated in Chinese patients with advanced or refractory solid tumors. Adverse events and PK profiles of ridaforolimus in this study were similar to those from Caucasian and Japanese patients reported previously. FAU - Liu, Lian AU - Liu L AD - Department of Medical Oncology, Fudan University Shanghai Cancer Center, Shanghai, China. FAU - Zhang, Wen AU - Zhang W FAU - Li, Wenhua AU - Li W FAU - Lv, Fangfang AU - Lv F FAU - Xia, Zuguang AU - Xia Z FAU - Zhang, Sheng AU - Zhang S FAU - Liu, Wen AU - Liu W FAU - Zandvliet, Anthe S AU - Zandvliet AS FAU - Waajen, Sylvia AU - Waajen S FAU - Zhang, Li Xin AU - Zhang LX FAU - Yan, Li AU - Yan L FAU - Li, Jin AU - Li J LA - eng PT - Clinical Trial, Phase I PT - Journal Article DEP - 20130708 PL - England TA - J Hematol Oncol JT - Journal of hematology & oncology JID - 101468937 RN - 48Z35KB15K (ridaforolimus) RN - W36ZG6FT64 (Sirolimus) SB - IM MH - Adult MH - Aged MH - Drug Administration Schedule MH - Female MH - Humans MH - Male MH - Middle Aged MH - Neoplasms/*drug therapy/metabolism/pathology MH - Sirolimus/adverse effects/*analogs & derivatives/pharmacokinetics/therapeutic use PMC - PMC3716995 EDAT- 2013/07/09 06:00 MHDA- 2014/05/06 06:00 PMCR- 2013/07/08 CRDT- 2013/07/09 06:00 PHST- 2013/06/21 00:00 [received] PHST- 2013/07/04 00:00 [accepted] PHST- 2013/07/09 06:00 [entrez] PHST- 2013/07/09 06:00 [pubmed] PHST- 2014/05/06 06:00 [medline] PHST- 2013/07/08 00:00 [pmc-release] AID - 1756-8722-6-48 [pii] AID - 10.1186/1756-8722-6-48 [doi] PST - epublish SO - J Hematol Oncol. 2013 Jul 8;6:48. doi: 10.1186/1756-8722-6-48.