The hydraulic influence in androgen-related hair growth: implications in autoimmune disease.

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Med Hypotheses 2002 Nov;59(5):522-6

The hydraulic influence in androgen-related hair growth: implications in autoimmune disease.

Androgen-related changes in hair growth represent something of a mystery. Through the action of dihydrotestosterone (DHT), hair growth is increased in specific areas of the body. Elevated levels of DHT produce a general increase over the larger part of the body, often accompanied by hair loss in specific areas of the scalp. Because of this 'opposite' effect, a genetic difference in the hair follicles is proposed. This view is supported through the success of the 'plug graft' transplantation technique. However, this is unsatisfactory, because transplantation procedures that should work well according to this theory, ultimately fail. There is an alternative 'mechanism', that demonstrates its origins in the prime function of hair as an insulator. This simple mechanism makes sense of all the recognized effects of DHT in the dermal system, and throughout the body. In DHT-related hair growth it can be directly observed. The implication is that DHT achieves its effects through a primary physiological action that can be easily tested given the necessary expertise. Given existing knowledge, such a proven action of DHT would have serious implications for further understanding of female susceptibility to autoimmune disease.

Dermatol Surg 2002 Aug;28(8):720-8

Follicular unit extraction: minimally invasive surgery for hair transplantation.

BACKGROUND: Follicular Unit Transplantation (FUT) is performed using large numbers of naturally occuring individual follicular units obtained by single-strip harvesting and stereo-microscopic dissection. Donor wound scarring from strip excision, although an infrequent complication, still concerns enough patients that an alternative solution is warranted. OBJECTIVE: The purpose of this paper is to introduce Follicular Unit Extraction (The FOX Procedure), in which individual follicular units are removed directly from the donor region through very small punch excisions, and to describe a test (The FOX Test) that determines which patients are candidates for this procedure. This paper explores the nuances, limitations, and practical aspects of Follicular Unit Extraction (FUE). METHODS: FUE was performed using 1-mm punches to separate follicular units from the surrounding tissue down to the level of the mid dermis. This was followed by extraction of the follicular units with forceps. The FOX test was developed to determine which patients would be good candidates for the procedure. The test was performed on 200 patients. Representative patients who were FOX-positive and FOX-negative were studied histologically. RESULTS: The FOX Test can determine which patients are suitable candidates for FUE. Approximately 25% of the patients biopsied were ideal candidates for FUE and 35% of the patients biopsied were good candidates for extraction. CONCLUSION: FUE is a minimally invasive approach to hair transplantation that obviates the need for a linear donor incision. This technique can serve as an important alternative to traditional hair transplantation in certain patients.

J Am Acad Dermatol 2002 Apr;46(4):517-23

Changes in hair weight and hair count in men with androgenetic alopecia after treatment with finasteride, 1 mg, daily.

BACKGROUND: Finasteride, a type II 5alpha-reductase inhibitor, reduces scalp and serum dihydrotestosterone and has been shown to be effective in men with androgenetic alopecia (AGA). OBJECTIVE: The purpose of this study was to determine the effect of finasteride on scalp hair weight in men with AGA. METHODS: Sixty-six men with AGA received finasteride, 1 mg/d, or placebo in a 48-week study, and 49 men continued in a 48-week extension. Efficacy was assessed by scalp hair weights and hair counts. RESULTS: As expected, hair counts improved with finasteride (net mean percent change +/- SE [95% CI] compared with placebo = 9.2% +/- 2.8% [3.8, 14.6] and 15.4% +/- 3.2% [9.1, 21.7] at 48 and 96 weeks, respectively; P <.01 for both time points), and net improvements in hair weight were greater (25.6% +/- 3.6% [18.5, 32.7] and 35.8% +/- 4.6% [26.7, 44.8] at 48 and 96 weeks, respectively; P <.001 for both time points). Finasteride was generally well tolerated. CONCLUSION: In this study, finasteride, 1 mg, increased hair weight in men with AGA. Hair weight increased to a larger extent than hair count, implying that factors other than the number of hairs, such as increased growth rate (length) and thickness of hairs, contribute to the beneficial effects of finasteride in treated men.

Dermatol Clin 2001 Oct;19(4):711-26, ix

Hair and systemic disease.

Hair loss (alopecia) occurs as a manifestation of numerous systemic diseases, but usually can be categorized into one of five general groups: telogen effluvium, anagen arrest, follicular destruction, hair miniaturization, and hair shaft defects. An excess of hair also can be evidence of internal disease, and there are two general categories of increased hair density: hypertrichosis and hirsutism. The basic categories of hair disease and the systemic conditions associated with them are discussed. The history, physical examination, and histopathologic data usually are sufficient to categorize the form of hair disorder and may provide a clue to the nature of the underlying systemic disease.

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DHEA has been suggested to provide numerous potential benefits. DHEA (or dehydroepiandrosterone) is converted into androgens (male hormones) or estrogens (female hormones) in the cells. Our bodies produce decreasing amount of DHEA as we get older. various health benefits: To deter aging, improve sexual function/erectile dysfunction, treat cognitive decline, enhance athletic performance, facilitate weight loss, improve strength, prevent osteoporosis, enhance immunomodulation for rheumatic conditions, and treat depression.

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