PMID- 24369111 OWN - NLM STAT- MEDLINE DCOM- 20150818 LR - 20191112 IS - 2212-3911 (Electronic) IS - 1574-8863 (Linking) VI - 9 IP - 2 DP - 2014 TI - Anti-cancer, pharmacokinetic and biodistribution studies of cremophor el free alternative paclitaxel formulation. PG - 145-55 AB - PURPOSE: The aim of the present investigation is to determine the in vivo potential of previously developed and optimized Cremophor EL free paclitaxel (CF-PTX) formulation consisting of soya phosphatidylcholine and biosurfactant sodium deoxycholate. CF-PTX was found to have drug loading of 6 mg/ml similar to Cremophor EL based marketed paclitaxel formulation. In the present study, intracellular uptake, repeated dose 28 days sub-acute toxicity, anti-cancer activity, biodistribution and pharmacokinetic studies were conducted to determine in vivo performance of CF-PTX formulation in comparison to marketed paclitaxel formulation. METHODS: Intracellular uptake of CF-PTX was studied using A549 cells by fluorescence activated cell sorting assay (FACS) and fluorescence microscopy. In vivo anti-cancer activity of CF-PTX was evaluated using Ehrlich ascites carcinoma (EAC) model in mice followed by biodistribution and pharmacokinetic studies. RESULTS: FACS investigation showed that fluorescence marker acridine orange (AO) solution showed only 19.8+/-1.1% intracellular uptake where as significantly higher uptake was observed in the case of AO loaded CF-PTX formulation (85.4+/-2.3%). The percentage reduction in tumor volume for CF-PTX (72.5+/-2.3%) in EAC bearing mice was found to be significantly (p<0.05) higher than marketed formulation (58.6+/-2.8%) on 14th day of treatment. Pharmacokinetic and biodistribution studies showed sustained plasma concentration of paclitaxel depicted by higher mean residence time (MRT; 18.2+/-1.8 h) and elimination half life (12.8+/-0.6 h) with CF-PTX formulation as compared to marketed formulation which showed 4.4+/-0.2 h MRT and 3.6+/-0.4 h half life. The results of the present study demonstrated better in vivo performance of CF-PTX and this formulation appears to be a promising carrier for sustained and targeted delivery of paclitaxel. FAU - Jain, Subheet K AU - Jain SK FAU - Utreja, Puneet AU - Utreja P FAU - Tiwary, Ashok K AU - Tiwary AK FAU - Mahajan, Mohit AU - Mahajan M FAU - Kumar, Nikhil AU - Kumar N FAU - Roy, Partha AU - Roy P AD - Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, 143 005, India. subheetjain@rediffmail.com. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United Arab Emirates TA - Curr Drug Saf JT - Current drug safety JID - 101270895 RN - 0 (Antineoplastic Agents, Phytogenic) RN - 6D4M1DAL6O (cremophor EL) RN - P88XT4IS4D (Paclitaxel) RN - PDC6A3C0OX (Glycerol) SB - IM MH - Animals MH - Antineoplastic Agents, Phytogenic/*administration & dosage MH - Carcinoma, Ehrlich Tumor/drug therapy MH - Chemistry, Pharmaceutical MH - Female MH - Glycerol/administration & dosage/*analogs & derivatives MH - Male MH - Mice MH - Paclitaxel/*administration & dosage/adverse effects/pharmacokinetics/pharmacology MH - Tissue Distribution EDAT- 2013/12/27 06:00 MHDA- 2015/08/19 06:00 CRDT- 2013/12/27 06:00 PHST- 2013/09/25 00:00 [received] PHST- 2013/12/10 00:00 [revised] PHST- 2013/12/13 00:00 [accepted] PHST- 2013/12/27 06:00 [entrez] PHST- 2013/12/27 06:00 [pubmed] PHST- 2015/08/19 06:00 [medline] AID - CDS-EPUB-58229 [pii] AID - 10.2174/1574886308666131223123218 [doi] PST - ppublish SO - Curr Drug Saf. 2014;9(2):145-55. doi: 10.2174/1574886308666131223123218.