Oseltamivir phosphateOseltamivir phosphate
MedChemExpress (MCE)
HY-17016
204255-11-8
GS 4104 phosphate
99.91%
4°C, sealed storage, away from moisture *In solvent : -80°C, 6 months
-20°C, 1 month (sealed storage, away from moisture)
Room temperature in continental US
may vary elsewhere.
Oseltamivir phosphate (GS 4104) is a neuraminidase inhibitor recommended for the treatment and prophylaxis of influenza A and B.
Oseltamivir phosphate (OP) is a prodrug that is readily absorbed from the gastrointestinal tract after oral administration and is extensively converted predominantly by hepatic esterases to Oseltamivir carboxylate (OC)[1]. Oseltamivir phosphate is a widely used anti-influenza sialidase inhibitor. The metabolic activity of CMA07 and CMT-U27 cell lines is significantly decreased with 305 μM Oseltamivir phosphate treatment (p=0.005 and p[2].
Oseltamivir phosphate-treated mice present significantly more inflammatory infiltrate in primary tumors (p=0.01). Ki-67 antigen and caspase-3 protein are used to assess CMT-U27 xenograft tumor cell proliferation and apoptosis respectively. Virtually no differences are found in Ki-67 and caspase 3 (p=0.2) expression between Oseltamivir-treated and non-treated mice[2].
Mice[2] Female NIH(S)II-nu/nu nude mice, aged 4-6 weeks, are orthotopically inoculated with 1×106 viable CMT-U27 canine breast cancer cells in the mammary fat pad using a 25 gauge needle. A total of 8 mice are inoculated. When nodules reached a volume of approximately 500 mm3, mice (n=8) are randomized and divided into control group (n=4) and treatment group (n=4).The animals receive intraperitoneally (IP) dailly either 100 μL of PBS (control group) or 100mg/Kg of Oseltamivir phosphate, diluted in PBS (treatment group) until time of death. Tumor size is measured using calipers, and tumor volume (mm3) is estimated by width×length×height.
CMA07 and CMT-U27 cells are cultured in 24-well plates in triplicate for each condition: 0.305 μM, 3.05 μM, 30.5 μM and 305 μM Oseltamivir phosphate and PBS is used as control. Cells are counted every day for 7 days in a Neubauer’s chamber in a 1:2 dilution of cells in 0.4% trypan blue and cell count is done using the volume conversion factor for 1 mm3, which is 1×104. This assay is repeated 3 times and growth curves are traced[2].
Influenza A and B[1] Cellular Effect Cell Line Type Value Description References
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[1]. Huang H, et al. Transplacental transfer of Oseltamivir phosphate and its metabolite Oseltamivir carboxylate using the ex vivo human placenta perfusion model in Chinese Hans population. J Matern Fetal Neonatal Med. 2016 Aug 8:1-5. [Content Brief]
[2]. de Oliveira JT, et al. Anti-influenza neuraminidase inhibitor Oseltamivir phosphate induces canine mammary cancer cell aggressiveness. PLoS One. 2015 Apr 7
10(4):e0121590. [Content Brief]
[3]. Li P, et al. A Simple and Robust Approach for Evaluation of Antivirals Using a Recombinant Influenza Virus Expressing Gaussia Luciferase. Viruses. 2018 Jun 13
10(6). pii: E325. [Content Brief]