Abstract
Background and Objectives
20(S)-Ginsenoside Rg3 could significantly inhibit tumor growth and metastasis in animals and in in vitro tumor cell invasion. This first-in-human pharmacokinetic study investigated the pharmacokinetics of 20(S)-ginsenoside Rg3 (hip intramuscular injection) in healthy Chinese volunteers.
Methods
Study 1 investigated single, ascending intramuscular doses of 10–60 mg of 20(S)-ginsenoside Rg3 in 24 healthy adults; study 2 evaluated multiple intramuscular doses of 30 mg of 20(S)-ginsenoside Rg3 administered for 15 days in 9 healthy adults.
Results
In both studies, 20(S)-ginsenoside Rg3 was rapidly absorbed, with a time to reach maximum plasma concentration (T max) of 4 h. After single-dose administration, elimination half-life t ½ was 32.0 ± 26.7, 51.7 ± 15.4 and 53.9 ± 25.7 h; maximum plasma concentration (C max) was 135.4 ± 35.3, 162.1 ± 47.2 and 399.8 ± 217.0 ng/mL; area under the plasma concentration-time curve (AUC) from time zero to infinity (AUC0–∞) was 3474.1 ± 1312.3, 8156.5 ± 1782.7 and 25,666.8 ± 9401.1 ng·h/mL; clearance CL/F was 3.2 ± 0.9, 3.8 ± 0.7 and 2.7 ± 1.3 L/h; urine excretion percentage during 72 h was 0.5 ± 0.1, 0.4 ± 0.1 and 0.4 ± 0.2 % after 10, 30 and 60 mg 20(S)-ginsenoside Rg3, respectively. After multiple-dose administration, C max was 457.0 ± 165.7 and 770.2 ± 275.4 ng/mL; AUC0–48h was 10,530.0 ± 4073.9 and 16,871.3 ± 6939.3 ng·h/mL after the first and the last 20(S)-ginsenoside Rg3 doses, respectively; fluctuation percentage was 183.0 ± 46.3 %. Accumulation ratio was 1.7 ± 0.6 at steady state.
Conclusions
20(S)-ginsenoside Rg3 was generally well tolerated. In these studies, 20(S)-ginsenoside Rg3 exhibited a pharmacokinetic profile suitable for once-every-2-days dosing.
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Acknowledgments
The authors would like to thank staff in the study team and all study subjects. This study was sponsored by Beijing Xinliheng Pharmaceutical Technology Development Co., Ltd.
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The work was supported by a grant from the National Program on Key Research Project of New Drug Innovation (No. 2008ZX09312 and No. 2012ZX09303006-002).
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Qian Zhao, Pingya Li, Ji Jiang and Pei Hu declare no conflict of interest.
Ethical approval
Study protocols and the informed consent forms were approved by the independent ethics committee of Peking Union Medical College Hospital (PUMCH).
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Subjects provided written informed consent before study participation.
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Zhao, Q., Li, P., Jiang, J. et al. Pharmacokinetics of Single Ascending Doses and Multiple Doses of 20(S)-Ginsenoside Rg3 in Chinese Healthy Volunteers. Eur J Drug Metab Pharmacokinet 41, 845–853 (2016). https://doi.org/10.1007/s13318-015-0304-3
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DOI: https://doi.org/10.1007/s13318-015-0304-3