Seventeen cases of alopecia areata: combination of SADBE topical immunotherapy with other therapies.

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J Dermatol 2002 Oct;29(10):661-4

Seventeen cases of alopecia areata: combination of SADBE topical immunotherapy with other therapies.

Topical immunotherapy is effective for severe alopecia areata. However, there are patients with alopecia areata refractory to topical immunotherapy alone. We tried SADBE (squaric acid dibutylester) topical immunotherapy combined with topical dry ice cryotherapy, carpronium chloride (a parasympathetic nerve stimulant) and/or oral cepharanthin (a biscoclaur alkaloid) in alopecia areata refractory to topical SADBE. Seventeen patients with alopecia areata (3 multiple, 3 ophiasis, 5 totalis and 6 universalis) were treated with SADBE in our department in 1999 to 2001. In 3 cases (2 multiple and 1 universalis) out of the 17 cases, cosmetically acceptable regrowth of hair was observed in several months with topical SADBE alone. In the other 14 cases, the SADBE therapy alone for several months (mean: 6.9 months) resulted in no or poor regrowth of hair. However, with subsequent combination therapy of topical SADBE for several months (mean: 7.6 months), satisfactory regrowth of hair was observed in 6 of the 14 cases. Our cases indicate that combination therapy of topical SADBE with other therapies can be a choice for alopecia areata which is refractory to topical SADBE therapy alone.

FASEB J 2002 Dec;16(14):1967-9

Androgen-inducible TGF-beta1 from balding dermal papilla cells inhibits epithelial cell growth: a clue to understand paradoxical effects of androgen on human hair growth.

We attempted establishing an in vitro coculture system by using human dermal papilla cells (DPCs) from androgenetic alopecia (AGA) and keratinocytes (KCs) to explore the role of androgens in hair growth regulation. Androgen showed no significant effect on the growth of KCs when they were cocultured with DPCs from AGA. Because the expressions of mRNA of androgen receptor (AR) decreased during subcultivation of DPCs in vitro, we transiently transfected the AR expression vector into the DPCs and cocultured them with KCs. In this modified coculture, androgen significantly suppressed the growth of KCs by approximately 50%, indicating that overexpression of AR can restore the responsiveness of the DPCs to androgen in vivo. We found that androgen stimulated the expression of TGF-beta1 mRNA in the cocultured DPCs. ELISA assays demonstrated that androgen treatment increased the secretion of both total and active TGF-beta1 in the conditioned medium. Moreover, the neutralizing anti-TGF-beta1 antibody reversed the androgen-elicited growth inhibition of KCs in a dose-dependent manner. These findings suggest that androgen-inducible TGF-beta1 derived from DPCs of AGA is involved in epithelial cell growth suppression in our coculture system, providing the clue to understand the paradoxical effects of androgens for human hair growth.

Dermatol Surg 2002 Sep;28(9):804-7

A random study of Asian male androgenetic alopecia in Bangkok, Thailand.

BACKGROUND: Androgenetic alopecia remains the most common cause of male pattern baldness (MPB) in all races. The prevalence of MPB in Caucasians is well documented. The prevalence of MPB in Asians is believed to be very low, only one-fourth to one-third on average compared to Caucasians. However, according to my previous study, there is a clear trend indicating that it is approaching that of Caucasians. OBJECTIVE: To assess the prevalence of MPB in the Asian population in Bangkok, Thailand; to compare this prevalence to previous studies conducted on Asians; and to compare the results to previous studies conducted on Caucasian. METHODS: This study was conducted by two physicians and assisted by two registered nurses. The questionnaire included age, sex, Norwood classification, diet, family history of baldness, income, and education. The physicians examined the scalp of each interviewee upon completion of each questionnaire. The ethnic focus group in this study was Thai and Chinese who reside in Bangkok, Thailand. The interviews were conducted in hospitals, nursing homes, classroom, medical meetings, temples, parks, and villages. RESULTS: A total of 1124 men were randomized in this study. The prevalence of cosmetically significant MPB (Norwood III-VII) was 38.52% and steadily increasing with age, approaching that of Caucasians. Variant MPB was found to be 0.67% and other types of androgenetic alopecia was 0.6%. From an ethnic point of view, the majority of the groups were of mixed blood and mostly of Chinese origin, thus we were unable to distinguish between Chinese and Thai. CONCLUSION: This study shows that the prevalence of MPB in Asians is not as low as previously thought. The cause of this increasing prevalence is uncertain. There are no past studies in Thailand for comparison, however, it can be extrapolated that the socioeconomic environment and westernized diet may contribute to this prevalence.

Dermatology 2002;204(1):33-6

Perception of baldness and hair density.

BACKGROUND: Androgenetic alopecia needs to be scored precisely. OBJECTIVE: A possible measure is the ratio between the hair density in the parietal area and that in the occipital area which, being not affected by baldness, supposedly has a 'normal' density. METHODS: On the vertex and just below the occipital protuberance of 109 men, two 1-cm(2) areas were identified. In both areas, hairs were clipped short and photographed by a videomicroscope. Hairs were then counted within a 30-mm(2)-wide central square section. RESULTS: In the occipital area, the average count was 127/cm(2), without differences among the Hamilton/Norwood classes. In the parietal area, the average density significantly diminished from 138 to 47/cm(2). A main difference was found between classes 1-3 vertex and classes 4-6. CONCLUSIONS: The parietal/occipital ratio decreased significantly only when baldness was clinically manifest. The parietal/occipital ratio cannot be a better measure of baldness severity than the rough Hamilton/Norwood scale. The perception of early baldness does not depend on the diminished hair density, but also on the progressive thinning of the hair shafts.

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