Pharmacokinetics and Biodistribution of Pegylated Methotrexate after IV Administration to Mice
| Author | Gholamhossein Yousefi | en |
| Author | Alireza Shafaati | en |
| Author | Afshin Zarghi | en |
| Author | Seyed Mohsen Foroutan | en |
| Issued Date | 2018-12-31 | en |
| Abstract | The efficacy of methotrexate (MTX) as an antimetabolite chemotherapeutic agent highly depends on its blood circulation half-life. In our previous study, different conjugates of MTX (MTX-PEG) were synthesized, their physicochemical properties were investigated and MTX-PEG5000 was finally selected as optimum drug-conjugate for further investigations. In the current work, first the stability of MTX-PEG5000 was studied at 37 °C and the results indicated its high stability in plasma (T1/2 = 144 h) and a relatively rapid degradation in tissue homogenate (T1/2 = 24 h). The study of protein binding pointed out that the conjugate was highly protein-bound (95%). The results of pharmacokinetic studies in mice indicated that MTX-PEG5000 had longer plasma distribution and elimination half-lives compared to free MTX (T1/2α 9.16 min for MTX-PEG5000 versus 2.45 min for MTX and T1/2β 88.44 for MTX-PEG5000 versus 24.33 min for MTX). Pharmacokinetic parameters also showed higher area under the curve (AUC) of conjugate compared to parent drug (12.33 mg.mL-1.min for MTX-PEG5000 versus 2.64 mg.mL-1.min for MTX). The biodistribution studies demonstrated that MTX-PEG5000 did not highly accumulate in liver and intestine and had a mild and balanced distribution to other organs. Also, the conjugate was measurable in tissues up to 48 h after injection and was detected in the brain, suggesting the possibility of delivering drug to brain tumors. | en |
| DOI | https://doi.org/10.22037/ijpr.2018.2370 | en |
| Keyword | Methotrexate | en |
| Keyword | Pegylation | en |
| Keyword | Pharmacokinetics | en |
| Keyword | Biodistribution | en |
| Keyword | Mice | en |
| Keyword | Stability | en |
| Publisher | Brieflands | en |
| Title | Pharmacokinetics and Biodistribution of Pegylated Methotrexate after IV Administration to Mice | en |
| Type | Original Article | en |
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