24 citations
,
May 2010 in “Hautarzt” This review explores various hormone influences on hair growth and loss beyond androgens, noting that clinical hormone therapies for aging may impact hair due to associated hormone level reductions, but reports no new empirical results.
142 citations
,
January 2010 in “Journal of dermatological science” This review covers follicle-targeting drug delivery systems, exploring their potential for improving localized and systemic therapies, and highlights the need for further research into follicle penetration mechanisms.
55 citations
,
June 2009 in “Journal of Pharmaceutical Sciences” This study found that ethanol-containing formulations significantly increased minoxidil retention in the stratum corneum and appendages initially, while a propylene glycol-rich formulation enhanced deeper skin penetration over time.
82 citations
,
May 2009 in “BJCP. British journal of clinical pharmacology/British journal of clinical pharmacology” The study reported that combining the Follicular Closing Technique with the Franz diffusion cell is a valuable method for investigating follicular caffeine penetration in vitro, though kinetics differ from in vivo results.
98 citations
,
December 2008 in “Journal of Investigative Dermatology” This review discusses the possible impacts of prolactin on skin conditions like psoriasis, alopecia, and stress-related dermatoses, emphasizing the need for further research to explore its therapeutic potential.
49 citations
,
September 2008 in “International journal of pharmaceutics” This study suggests that artificial sebum L may serve as an effective substitute for human sebum in drug transport studies, due to its similar physicochemical properties.
16 citations
,
March 2008 in “International journal of pharmaceutics” This study found that formulation factors like pH, viscosity, and chemical enhancers can significantly influence intrafollicular hydrocortisone permeation in vitro, with higher pH and enhancers reducing follicular contribution.
19 citations
,
January 2008 in “Journal of Pharmacy and Pharmacology” This study found that porcine skin serves as a reliable model for studying drug absorption into human hair follicles, showing a strong correlation in follicular drug absorption between porcine and human skin.
182 citations
,
December 2007 in “BJCP. British journal of clinical pharmacology/British journal of clinical pharmacology” This study demonstrated that hair follicles significantly expedite the absorption of caffeine through the skin compared to interfollicular pathways.
8 citations
,
November 2007 in “Skin Pharmacology and Physiology” In this study, skin stretching significantly increased the delivery of retinyl ascorbate into the dermis, while sealing hair follicles did not affect absorption through native skin.
33 citations
,
June 2007 in “International Journal of Pharmaceutics” This study found that the sebum partition coefficient (K(sebum)) for some drugs differs from the stratum corneum partition coefficient (K(sc)), indicating its importance for targeted drug delivery into hair and sebaceous follicles.
29 citations
,
May 2007 in “International journal of pharmaceutics” This study found that drug transport through artificial sebum varies depending on the compound, suggesting that sebum-targeted delivery can be optimized by selecting compounds based on their distinct transport profiles in sebum versus skin.
93 citations
,
January 2007 in “Skin Pharmacology and Physiology” In this study, caffeine applied in a shampoo penetrated hair follicles faster and more effectively than through the skin surface within the first 20 minutes.
141 citations
,
November 2005 in “International journal of pharmaceutics” This review examines the role of hair follicles and sebaceous glands in percutaneous drug delivery but does not report new clinical results; it calls for further exploration of follicle-targeting therapies.
162 citations
,
August 2005 in “The journal of investigative dermatology/Journal of investigative dermatology” This study introduces a novel non-invasive method called "differential stripping" to quantify the penetration of topically applied substances into hair follicles.
36 citations
,
July 2004 in “Journal of Controlled Release” This study demonstrates that confocal laser scanning microscopy can effectively visualize the rapid diffusion and penetration pathway of a dye into the hair follicle in fresh human scalp skin.
253 citations
,
June 2004 in “Journal of Controlled Release” The research observed that 40-nm self-assembled nanoparticles enhanced minoxidil penetration in hairy guinea pig skin compared to 130-nm nanoparticles, but this size effect was absent in hairless skin.
405 citations
,
January 2004 in “Journal of Investigative Dermatology” This study found that hair follicle characteristics vary significantly across different body sites, with the forehead and calf showing the highest potential follicular reservoirs, challenging previous assumptions about skin appendage distribution.
13 citations
,
January 2001 in “Skin pharmacology and physiology” This article discusses a new device for visualizing and quantifying skin distribution of a radioactively labelled compound, but reports no new clinical results.
72 citations
,
January 2001 in “Drugs” This review discusses current and emerging drug therapies for treating androgenetic alopecia and alopecia areata, and reports no clinical results; it highlights a need for improved and novel treatments.
62 citations
,
May 1997 in “Journal of Pharmaceutical Sciences” This study concluded that sebaceous glands are the main pathway for the antiandrogen RU 58841 to permeate the skin, with liposomes enhancing localization in these glands.
37 citations
,
January 1997 in “Journal of Pharmaceutical Sciences” This study observed that hairless rat skin was more permeable to mannitol and progesterone than hairy rat skin, indicating that follicular structures significantly impact percutaneous absorption.
82 citations
,
January 1994 in “Skin Pharmacology and Physiology” This study found that human skin with hair follicles and sebaceous glands absorbed significantly more steroids than scar skin without these appendages, indicating their role in steroid penetration.