come dicevo prima sono pochi....
Anche nell'articolo che avevo citato prima si legge:
Citazione:F. Clinical hair growth effects of estrogens
There are only a few reports on the use of systemic estrogens for hair loss management. Estrogens have been used for topical treatment of hair diseases for more than half a century (284) and constitute a firm staple of management strategies for female pattern androgenetic alopecia in central Europe (88). Orentreich observed in 1969 a decrease in daily effluvium during therapy with systemic estrogens (285), which were reported to increase the proliferation rate, slow down differentiation, and, thus, postpone telogen effluvium (286). On this basis, even intralesional stilbene administration was once recommended for the treatment of alopecia areata (287). Some studies have reported an increased anagen and decreased telogen rate after treatment with estrogens, compared with placebo (288, 289). However, professionally executed, double-blind, placebo-controlled, randomized, prospective clinical trials on the efficacy of topical E2 in the treatment of androgenetic alopecia and non-androgen-dependent telogen effluvium are still painfully missing.
Since the studies of Hamilton, we know that androgens play a crucial role in the onset and progression of androgenetic alopecia (290). Androgenetic alopecia occurs in genetically susceptible individuals and in androgen-sensitive hair follicles when testosterone is transformed to 5{alpha}-dihydrotestosterone by 5{alpha}-reductase (88, 291). This conversion is inhibited inter alia by E2 (288, 292). For the treatment of androgenetic alopecia in women, solutions containing estradiol benzoate, estradiol valerate, or 17{alpha}-estradiol are commercially available in Europe. Due to unwanted side effects like gynecomastia, E2 should not be used in men because very high topical doses seem to be required to obtain measurable hair growth effects (84), whereas the inactive stereoisomer 17{alpha}-estradiol may also be prescribed for men.
Its claimed efficacy for male or female pattern balding (290), however, remains as yet unsupported by solid, professionally designed and executed, prospective, double-blind, placebo-controlled long-term clinical trials. However, that 17{alpha}-estradiol has been reported to induce aromatase activity in organ-cultured human anagen hair follicles, with the consequence of an increased conversion of testosterone to E2 and androstenedione (293) certainly encourages one to systematically explore the use of 17{alpha}-estradiol for androgenetic alopecia in men and women.
Gi studi a cui fanno riferimento sono quelli nelle note cioè:
# Orentreich N 1969 Scalp hair replacement in man. Adv Biol Skin 9:99–108
# Moretti G 1977 Hormone und Haarwachstum beim Menschen. Hautarzt 28:619–625[Medline]
# Winkler K 1969 Hormonbehandlung in der Dermatologie. Berlin: de Gruyter
# Orfanos CE, Wustner H 1975 Penetration and side effects of local estrogen application in alopecia androgenetica. Hautarzt 26:367–369[Medline]
# Orfanos CE, Vogels L 1980 Local therapy of androgenetic alopecia with 17 {alpha}-estradiol in a controlled, randomized double-blind study. Dermatologica 161:124–132[Medline]
# Hamilton JB 1951 Patterned loss of hair in man; types and incidence. Ann NY Acad Sci 53:708–728[Medline]
# Jamin C 2002 Androgenetic alopecia. Ann Dermatol Venereol 129:801–803[Medline]
# Nukui F 1997 Effect of chlormadinone acetate and ethinylestradiol treatment on epididymal 5 {alpha}-reductase activities in patient with prostate cancer. Endocr J 44:127–132[Medline]
# Hoffmann R, Niiyama S, Huth A, Kissling S, Happle R 2002 17{alpha}-Estradiol induces aromatase activity in intact human anagen hair follicles ex vivo. Exp Dermatol 4:376–380[CrossRef]
Ma da quanto ho capito a parte quelli sul 17 alfa estradiolo (che trovi nella homepage sotto al'Ell Cranell Alpha http://www.calvizie.net/documento.asp?args=1.1.705
non ce ne sono molti altri a meno che non sia uscita qualche novità che dovrei cercare....