waynakyo
Experienced Member
- Reaction score
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http://www.ncbi.nlm.nih.gov/pubmed/25085659
[FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]Arch Pharm Res. 2014 Aug 2. [Epub ahead of print][/FONT]
[h=1][FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]Enhanced skin permeation of 5α-reductase inhibitors entrapped into surface-modified liquid crystalline nanoparticles.[/FONT][/h][FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]Madheswaran T1, Baskaran R, Sundaramoorthy P, Yoo BK.[/FONT]
[h=3][FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]Author information[/FONT][/h]
[h=3][FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]Abstract[/FONT][/h][FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]The objective of this study is to enhance skin permeation of finasteride and dutasteride for the treatment of androgeneticalopecia using surface-modified liquid crystalline nanoparticle (sm-LCN) dispersion. LCN entrapped with the drugs was prepared by using monoolein as a liquid crystal former, and surface modification was performed by treatment of the LCN dispersion with same volume of 1 % v/v acetic acid solution containing chitosan. Physicochemical properties of the LCN's were studied with regard to particle size, polydispersity index, zeta potential, and release of the drugs. Skin permeation of drugs entrapped into the LCN and sm-LCN was investigated with porcine abdominal skin using Franz diffusion cell. Cytotoxicity of the LCN's was also studied using human skin keratinocytes. The particle size and zeta potential of the LCN were 197.9 ± 2.5 nm and -20.2 ± 1.9 mV, respectively, and sm-LCN showed slightly bigger size and positive zeta potential due to the presence of thin coating on the surface of the nanoparticles. Compared to LCN, sm-LCN resulted in significantly enhanced skin permeation of the drugs whereas in vitro release was significantly reduced. Cell viability as a measure of cytotoxicity was above 80 % up to 20 μg/ml concentration of both LCN and sm-LCN. In conclusion, sm-LCN may provide a strategy to maximize therapeutic efficacy minimizing unwanted systemic side effects associated with the use of the drugs for the treatment of androgenetic alopecia.[/FONT]
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My opinion: to minimize finasteride's side effects you not only want to make a topical formulation, but you have to somehow reduce its ability to go systemic... but it seems to be the above article only focus on the first, so not sure why they claim what they do..
[FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]Arch Pharm Res. 2014 Aug 2. [Epub ahead of print][/FONT]
[h=1][FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]Enhanced skin permeation of 5α-reductase inhibitors entrapped into surface-modified liquid crystalline nanoparticles.[/FONT][/h][FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]Madheswaran T1, Baskaran R, Sundaramoorthy P, Yoo BK.[/FONT]
[h=3][FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]Author information[/FONT][/h]
[h=3][FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]Abstract[/FONT][/h][FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]The objective of this study is to enhance skin permeation of finasteride and dutasteride for the treatment of androgeneticalopecia using surface-modified liquid crystalline nanoparticle (sm-LCN) dispersion. LCN entrapped with the drugs was prepared by using monoolein as a liquid crystal former, and surface modification was performed by treatment of the LCN dispersion with same volume of 1 % v/v acetic acid solution containing chitosan. Physicochemical properties of the LCN's were studied with regard to particle size, polydispersity index, zeta potential, and release of the drugs. Skin permeation of drugs entrapped into the LCN and sm-LCN was investigated with porcine abdominal skin using Franz diffusion cell. Cytotoxicity of the LCN's was also studied using human skin keratinocytes. The particle size and zeta potential of the LCN were 197.9 ± 2.5 nm and -20.2 ± 1.9 mV, respectively, and sm-LCN showed slightly bigger size and positive zeta potential due to the presence of thin coating on the surface of the nanoparticles. Compared to LCN, sm-LCN resulted in significantly enhanced skin permeation of the drugs whereas in vitro release was significantly reduced. Cell viability as a measure of cytotoxicity was above 80 % up to 20 μg/ml concentration of both LCN and sm-LCN. In conclusion, sm-LCN may provide a strategy to maximize therapeutic efficacy minimizing unwanted systemic side effects associated with the use of the drugs for the treatment of androgenetic alopecia.[/FONT]
- - - Updated - - -
My opinion: to minimize finasteride's side effects you not only want to make a topical formulation, but you have to somehow reduce its ability to go systemic... but it seems to be the above article only focus on the first, so not sure why they claim what they do..
