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Clin Exp Dermatol 2002 Jul;27(5):383-88
Female pattern hair loss.
Female pattern hair loss is a common condition characterized by a diffuse reduction in hair density over the crown and frontal scalp with retention of the frontal hairline. The prevalence increases with advancing age. It has been widely thought to be the female counterpart of male balding and is often referred to as female androgenetic alopecia. However, the role of androgens is not fully established. Scalp hair loss is undoubtedly a feature of hyperandrogenism in women but many women with female pattern hair loss have no other clinical or biochemical evidence of androgen excess. Female pattern hair loss is probably a multifactorial genetically determined trait and it is possible that both androgen-dependent and androgen-independent mechanisms contribute to the phenotype. In managing patients with female pattern hair loss the physician should be aware that the adverse effects on quality of life can be quite severe and do not necessarily correlate with the objective degree of hair loss. The treatment options are currently limited but modest improvements in hair density are achievable in some women.
Eur J Dermatol 2002 May-Jun;12(3):236-9
HLA class II alleles in patients with alopecia areata.
Our purpose was to determine which HLA class II alleles are associated with Turkish alopecia areata patients. Also we investigated whether there was a relationship between the age of onset and severity of disease and HLA alleles or not. Sixty-five patients with alopecia areata were included in this study, and 50 healthy transplant donors were used as a control group. The total group of alopecia areata patients as well as various subgroups according to scalp hair loss were compared to the control group. HLA DNA typing was performed by polymerase chain reaction/sequence specific primer method. The frequency of DQB1*03 allele was 86.1% in all patients compared to 62.0% in controls (P = 0.005). While the frequency of DQB1*03 was significantly increased, the frequency of DRB1*03 was decreased in the all patients group (4.6% versus 22.0%, P = 0.01). In the group of scalp hair loss less than 25%; the frequency of DRB1*03 was decreased (3.2%, P = 0.02). The group of patients with 25-75% scalp hair loss was compared to control group; the frequencies of DRB1*04 (66.7% versus 28.0%, P = 0.02) was increased. When the alopecia totalis, alopecia universalis or alopecia totalis/alopecia universalis group was compared to control group; DQB1*03 was associated with an increased frequency in this group versus control group (90.9%, P = 0.03). There were no significant differences for the other DQ alleles and the DR alleles tested in the patients and in the controls. When patients with early onset were compared to patients with late onset; no significant allele differences were found. Our findings suggested that DQB1*03 allele is a marker for general susceptibility to alopecia areata and may also serve as special genetic marker for susceptibility for the severe form of alopecia areata in our population. However, this association is not related to age at onset of the disease.
J Invest Dermatol 2002 Feb;118(2):216-25
Molecular mechanisms regulating hair follicle development.
Clinical conditions causing hair loss, such as androgenetic alopecia, alopecia areata, and scarring alopecia, can be psychologically devastating to individuals and are the target of a multimillion dollar pharmaceutical industry. The importance of the hair follicle in skin biology, however, does not rest solely with its ability to produce hair. Hair follicles are self-renewing and contain reservoirs of multipotent stem cells that are capable of regenerating the epidermis and are thought to be utilized in wound healing. Hair follicles are also the sites of origin of many neoplasias, including some basal cell carcinomas and pilomatricoma. These diseases result from inappropriate activation of signaling pathways that regulate hair follicle morphogenesis. Identification of the signaling molecules and pathways operating in developing and postnatal, cycling, hair follicles is therefore vital to our understanding of pathogenic states in the skin and may ultimately permit the development of novel therapies for skin tumors as well as for hair loss disease. The purpose of this review is to summarize recent progress in our understanding of the molecular mechanisms regulating hair follicle formation, and to discuss ways in which this information may eventually be utilized in the clinic.
Ann Dermatol Venereol. 2003 Mar;130(3):326-30.
Intravenous pulse methylprednisolone therapy for severe alopecia areata: an open study of 66 patients
INTRODUCTION: Treatment of alopecia areata is a difficult challenge. Some European publications have shown encouraging results with high dose pulse corticosteroid therapy in extensive plurifocal alopecia areata. We undertook a prospective open study between January 2000 and December 2001 using repeated pulse each month, with the aim of identifying the effects of this repetition and underlining the best indications. PATIENTS AND METHODS: Sixty-six patients aged 9 to 60 years old presenting an extensive alopecia areata exceeding 30% of the scalp surface (n=47), alopecia totalis (n=8), alopecia universalis (n=8), ophiasic alopecia (n=3), for less than 12 months entered this study. The administered treatment was methylprednisolone 500 mg/d during 3 days or 5 mg/kg twice per day during 3 days in children. These pulses were repeated after 4 and 8 weeks, then a second series was carried out or not according to cases. The main evaluation criterion was the percentage of new terminal hair appearing on the bald areas, appreciated by clinical and photographic evaluation at 3 and 6 months. RESULTS: Ophiasic alopecia areata did not respond to treatment. A quarter of patients presenting universal alopecia had a good response (higher than 80 p. 100) followed by a relapse in half the cases. Half of the patients presenting alopecia totalis had a good response, which was maintained three times out of four. Multifocal alopecia areata seems the best indication since the patients under study presented a good response in 63.8 p. 100 of cases (78 p. 100 when it was a first episode and 90.5 p. 100 if the treatment had been started in less than 3 months before). The repetition of the pulses did not appear to increase the number of responders. CONCLUSION: This study provides the best indication of pulse methylprednisolone therapy: first recent episode of extensive plurifocal alopecia areata. These results are less convincing in long term history or other forms of alopecia areata.
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