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Ann Dermatol Venereol 2002 May;129(5 Pt 2):841-4
The hair follicle as a target for gene therapy
The hair follicle possesses progenitor cells required for continuous hair follicle cycling and for epidermal keratinocytes, melanocytes and Langerhans cells. These different cell types can be the target of topical gene delivery in the skin of the mouse. Using a combination of liposomes and DNA, we demonstrate the feasibility of targeting hair follicle cells in human scalp xenografts. We consider liposome composition and stage of the hair cycle as important parameters influencing transfection of human hair follicles. Transfection is possible only during the early anagen phase. Factors and obstacles for the use of gene therapy in treating alopecia and skin diseases are discussed. A theoretical framework for future treatment of cutaneous and systemic disorders using gene therapy is presented.
Rev Med Chir Soc Med Nat Iasi 2001 Oct-Dec;105(4):760-2
Treatment of alopecia areata with diphencyprone
Topic immunotherapy in alopecia areata consist in a mild contact dermatitis with help of a chemical substances, with a high potency of sensitization, such as dinytroclorbenzenul (DNCB), squaric acid dibutylester (SADBE) and diphencypronil (DPCP). Eight patients with alopecia areata, 3 with mild form and 5 with severe form was treated with DPCP in acetone solution. We have obtained a positive result in 3 cases (37.5%), one with total regrows and 2 with partial regrows and a negative result in 5 cases, 3 with partial regrows and loss of the hair in other areas and 2 cases with no response after 24 weeks. We consider this method like an alternative therapy in severe alopecia areata resistant at other treatments.
J Altern Complement Med 2002 Apr;8(2):143-52
A randomized, double-blind, placebo-controlled trial to determine the effectiveness of botanically derived inhibitors of 5-alpha-reductase in the treatment of androgenetic alopecia.
BACKGROUND: Androgenetic alopecia (AGA) is characterized by the structural miniaturization of androgen-sensitive hair follicles in susceptible individuals and is anatomically defined within a given pattern of the scalp. Biochemically, one contributing factor of this disorder is the conversion of testosterone (T) to dihydrotestosterone (DHT) via the enzyme 5-alpha reductase (5AR). This metabolism is also key to the onset and progression of benign prostatic hyperplasia (BPH). Furthermore, AGA has also been shown to be responsive to drugs and agents used to treat BPH. Of note, certain botanical compounds have previously demonstrated efficacy against BPH. Here, we report the first example of a placebo-controlled, double-blind study undertaken in order to examine the benefit of these botanical substances in the treatment of AGA. OBJECTIVES: The goal of this study was to test botanically derived 5AR inhibitors, specifically the liposterolic extract of Serenoa repens (LSESr) and beta-sitosterol, in the treatment of AGA. Subjects: Included in this study were males between the ages of 23 and 64 years of age, in good health, with mild to moderate AGA. RESULTS: The results of this pilot study showed a highly positive response to treatment. The blinded investigative staff assessment report showed that 60% of (6/10) study subjects dosed with the active study formulation were rated as improved at the final visit. CONCLUSIONS: This study establishes the effectiveness of naturally occurring 5AR inhibitors against AGA for the first time, and justifies the expansion to larger trials.
Am Fam Physician. 2003 Mar 1;67(5):1007-14.
Alopecia in women.
Alopecia can be divided into disorders in which the hair follicle is normal but the cycling of hair growth is abnormal and disorders in which the hair follicle is damaged. Androgenetic alopecia is the most common cause of hair loss in women. Other disorders include alopecia areata, telogen effluvium, cicatricial alopecia, and traumatic alopecias. The diagnosis is usually based on a thorough history and a focused physical examination. In some patients, selected laboratory tests or punch biopsy may be necessary. Topically administered minoxidil is labeled for the treatment of androgenetic alopecia in women. Corticosteroids and other agents are typically used in women with alopecia areata. Telogen effluvium is often a self-limited disorder. Because alopecia can be devastating to women, management should include an assessment for psychologic effects.
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