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A long‐acting pegylated recombinant human growth hormone (Jintrolong ® ) in healthy adult subjects: Two single‐dose trials evaluating safety, tolerability and pharmacokinetics
Author(s) -
Guan Y.,
He F.,
Wu J.,
Zhao L.,
Wang X.,
Huang L.,
Zeng G.,
Ren B.,
Chen J.,
Liao X.,
Ma Z.,
Chen X.,
Zhong G.,
Huang M.,
Zhao X.
Publication year - 2018
Publication title -
journal of clinical pharmacy and therapeutics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.622
H-Index - 73
eISSN - 1365-2710
pISSN - 0269-4727
DOI - 10.1111/jcpt.12732
Subject(s) - tolerability , pharmacokinetics , medicine , adverse effect , placebo , pharmacology , pharmacodynamics , randomized controlled trial , anesthesia , urology , pathology , alternative medicine
Summary What is known and objective Jintrolong ® is a pegylated recombinant human growth hormone (rhGH) (PEG‐rhGH) developed for weekly subcutaneous (sc) injection. The current human tolerability trial and pharmacokinetics (PK) trial evaluated the safety, tolerability and PK of single‐dose Jintrolong ® injection in healthy adult subjects. Methods Both trials were single‐centre, randomized, open‐label and single‐dose studies. In the human tolerability trial, 34 healthy subjects were randomized to receive single‐dose Jintrolong ® sc injection (0.01, 0.06, 0.2, 0.5 or 0.8 mg/kg) or placebo. In the PK study, 30 healthy male subjects were evenly randomized into 3 groups to receive single‐dose Jintrolong ® sc injection (0.1, 0.2 or 0.4 mg/kg), and the subjects receiving 0.4 mg/kg Jintrolong ® were given a single sc injection of conventional rhGH (0.067 mg/kg) after a 14‐day washout period. Safety and PK profiles of Jintrolong ® were evaluated. Results and discussion Jintrolong ® was well tolerated with no serious adverse events or local injection responses. The PK trial showed that the plasma growth hormone concentration elevated quickly and stayed at peak level between 12 and 48 hours post‐Jintrolong ® injection, then decreased gradually back to baseline within 168 hours. Compared to single‐dose conventional rhGH, Jintrolong ® at all doses demonstrated significantly longer half time and time to maximum plasma concentration, lower clearance and higher systemic drug exposure, indicating prolonged presence of GH in the subjects’ circulation. Additionally, systemic exposure to Jintrolong ® increased in a dose‐dependent manner. What is new and conclusion Single‐dose Jintrolong ® injection was well tolerated in healthy adult subjects, and the maximum tolerable dose was no lower than 0.8 mg/kg. Jintrolong ® was long‐acting with the potential for weekly administration.