title: Tea tree oil concentration in follicular casts after topical delivery: determination by high-performance thin layer chromatography using a perfused bovine udder model.
abstract: Tea tree oil, a popular antimicrobial agent is recommended for the treatment of acne vulgaris, a disease of the pilosebaceous unit. Tea tree oil formulations (colloidal bed, microemulsion, multiple emulsion, and liposomal dispersion containing 5% w/w tea tree oil) were applied to bovine udder skin. The follicular uptake of tea tree oil upon application was determined by a cyanoacrylate method. Tea tree oil was determined by quantifying terpinen-4-ol content using high-performance thin layer chromatography. The accumulation of tea tree oil in the follicular casts was 0.43 +/- 0.01, 0.41 +/- 0.009, 0.21 +/- 0.006, and 0.16 +/- 0.005 percentage by weight (milligram oil/gram of sebum plug) for microemulsion, liposomal dispersion, multiple emulsion, and colloidal bed, respectively. This is the first study of its kind to quantify tea tree oil concentration in the follicles.
authors.affiliation: Department of Pharmaceutics, Faculty of Pharmacy, Hamdard University, New Delhi 110 062, India. bijuss1@hotmail.com
authors.forename: S S
authors.initials: SS
authors.lastname: Biju
authors.forename: Alka
authors.initials: A
authors.lastname: Ahuja
authors.forename: Roop K
authors.initials: RK
authors.lastname: Khar
mesh_terms: D000269:Adhesives / Q000737:chemistry; D000279:Administration, Cutaneous; D000818:Animals; D000891:Anti-Infective Agents, Local / Q000494:pharmacology*; D002417:Cattle; D002851:Chromatography, High Pressure Liquid; D003102:Colloids; D003487:Cyanoacrylates / Q000737:chemistry; D004655:Emulsions; D005260:Female; D018859:Hair Follicle / Q000187:drug effects*; D008081:Liposomes; D008321:Mammary Glands, Animal / Q000187:drug effects*; D012869:Skin Absorption; D020947:Tea Tree Oil / Q000494:pharmacology*; D013729:Terpenes / Q000032:analysis
chemical_list: D000269:Adhesives; D000891:Anti-Infective Agents, Local; D003102:Colloids; D003487:Cyanoacrylates; D004655:Emulsions; D008081:Liposomes; D013729:Terpenes; C034019:terpinenol-4; D020947:Tea Tree Oil