Mulheres negras e construção de sentidos de identidade na transição capilar / Mujeres negras y construcción de significados de identidad en la transición capilar / Black women and construction of meanings of identity in hair transition

Resumo Transição capilar é o processo de abdicação de alisamentos químicos ou físicos dos cabelos, reassumindo suas texturas naturais. A presente pesquisa, de natureza qualitativa, visou a investigar a construção dos sentidos de identidade em mulheres negras que passaram pela transição capilar. Participaram do estudo 12 mulheres negras com idades compreendidas entre 18 e 34 anos. Para a coleta de dados foram utilizadas entrevistas semiestruturadas que foram analisadas através da análise de posicionamento. A transição capilar mudou a forma de posicionamento em relação a si, ao cabelo, à sociedade e à construção da autoimagem. Além de elucidar o processo de reafirmação identitária das interlocutoras, o estudo fomenta a discussão do racismo na sociedade brasileira, ao tratar da desvalorização da estética negra e, por conseguinte, do enaltecimento da branquitude.

Abstract Hair transition is the process of abdicating chemical or physical hair straightening, resuming its natural textures. This qualitative research aimed at investigating the construction of the meanings of identity in black women who went through the hair transition. Twelve black women between the ages of 18 and 34 participated in the study. For the data collection, semi-structured interviews were used and analyzed through the positioning analysis. Hair transition has changed the way of positioning towards itself, hair, society and the construction of self-image. In addition to elucidating the identity affirmation process of the interviewees, the study instigates the discussion of racism in Brazilian society, by dealing with the devaluation of black aesthetics and, therefore, the praise of whiteness.

Resumen La transición capilar es el proceso de abdicar del alisado químico o físico del cabello, retomando sus texturas naturales. La presente investigación, de carácter cualitativo, tuvo como objetivo investigar la construcción de los significados de la identidad en mujeres negras que atravesaron la transición capilar. Participaron del estudio doce mujeres negras de entre 18 y 34 años. Para la recolección de datos se utilizaron entrevistas semiestructuradas, las cuales fueron analizadas mediante análisis de posicionamiento. La transición capilar cambió la forma de posicionamiento en relación con una misma, el cabello, la sociedad y la construcción de la autoimagen. Además de dilucidar el proceso de afirmación identitaria de las interlocutoras, el estudio fomenta la discusión del racismo en la sociedad brasileña, al abordar la devaluación de la estética negra y, por tanto, el elogio de la blancura.

Desenvolvimento e avaliação de eficácia de nanoemulsão catiônica bioativa na proteção capilar aos danos foto-oxidativos / Development and evaluation of the effectiveness of bioactive cationic nanoemulsion in protecting hair photo-oxidative damage

A radiação solar, composta por radiação ultravioleta (UV), visível (Vis) e infravermelho, é responsável por acelerar os processos de alteração de cor e do conteúdo proteico da fibra capilar. Visando contornar este problema, este trabalho propõe a incorporação do flavonoide quercetina, de reconhecida atividade antioxidante, em uma nanoemulsão catiônica de aplicação capilar. Para tanto, foram desenvolvidas formulações contendo quercetina a 0,5% (p/p) pelo método de baixa energia sub-PIT. A formulação de menor índice de polidispersão (IPD) foi selecionada e submetida à Avaliação de Estabilidade Normal. Neste ensaio, a nanoemulsão foi armazenada em diferentes condições de temperatura por 90 dias, sendo analisados: características organolépticas, valor de pH, atividade antioxidante, conteúdo de quercetina, diâmetro médio de gotícula e potencial zeta. A fotoestabilidade da nanoemulsão envolveu a determinação do perfil de absorção e da sua atividade antioxidante após períodos de exposição à radiação UV/Vis. Posteriormente, a nanoemulsão foi caracterizada quanto aos seguintes parâmetros: eficiência de encapsulamento, perfil reológico, morfologia das gotículas por Microscopia Eletrônica de Transmissão Criogênica e Microscopia de Força Atômica (AFM). A possível interação entre a quercetina e os demais tensoativos presentes na nanoemulsão foi avaliada por Microscopia Confocal de Fluorescência e Análise térmica. A segurança da nanoemulsão foi determinada pelo método in vitro HET-CAM e por biocompatibilidade cutânea, em voluntários. A eficácia da nanoemulsão catiônica na fotoproteção das características da fibra capilar descolorida tratada com tintura cores loiro (12.0) ou ruivo (6.66) foi determinada avaliando-se os parâmetros cor, tração à ruptura, penteabilidade, fricção, perda proteica, morfologia das cutículas e nível de melanina radical por Espectroscopia de Ressonância Paramagnética Eletrônica (EPR), sendo calculado o Fator de Proteção Radicalar (FPR). As mechas de cabelo tingidas foram expostas à radiação UV/Vis artificial (500 W/m2) por até 180 h, sendo os parâmetros analisados antes e após o período de exposição. A nanoemulsão selecionada pelo reduzido IPD apresentava diâmetro médio de gotícula e potencial zeta iguais a 24,97±0,30 nm e 19,6±2,19 mV, respectivamente. Na Avaliação de Estabilidade Normal, a nanoemulsão armazenada a 45,0±2,0° C apresentou alterações significativas de todos os parâmetros avaliados, exceto potencial zeta, sendo que a elevação do diâmetro médio de gotícula acarretou em perda da transparência. A oxidação da quercetina e a instabilidade do tipo Ostwald ripening (ω3) foram as responsáveis pelas modificações observadas. No armazenamento a 5,0±2,0° C, a nanoemulsão manteve todos os parâmetros inalterados, mas a 25±2,0° C houve elevação discreta do diâmetro médio de gotícula, sem perda da funcionalidade. A nanoemulsão apresentou elevada fotoestabilidade, sem alteração da atividade antioxidante após exposição ao UV/Vis. A caracterização da nanoemulsão mostrou que a eficiência de encapsulamento foi de 99,8%, no mínimo, a formulação apresentou típico comportamento newtoniano e as gotículas apresentavam formato esférico. As imagens obtidas por Microscopia Confocal de Fluorescência e o ensaio de Análise térmica mostraram que a quercetina se encontra dentro das gotícula atuando, também, como co-tensoativo, por interagir com os tensoativos, além de exercer sua função antioxidante. A nanoemulsão foi classificada como levemente irritante (método HET-CAM), sendo esse baixo potencial de irritação corroborado pelo teste de biocompatibilidade cutânea. Na avaliação de eficácia, observou-se que a nanoemulsão protegeu a cor total (dE*) do cabelo tingido de loiro em 54%, e elevou a alteração da cor do cabelo tingido de ruivo em 47% (t = 180 h) em comparação à mecha controle. Além disso, a nanoemulsão melhorou a penteabilidade e reduziu os coeficientes de fricção. A radiação UV/Vis provocou elevada perda proteica e redução da espessura das cutículas em aproximadamente 50%. Concluiu-se, pelos resultados obtidos, que as moléculas que compoem a tintura capilar, principalmente os pigmentos mais escuros, atuaram como filtros solares, pois elas protegeram as estruturas proteicas da fibra. A nanoemulsão apresentou FPR igual a 3,31 e 4,14, para as mechas tingidas de loiro e ruivo, respectivamente. O FPR indica a capacidade de uma formulação em reduzir o nível de radicais livres formados por indução da radiação UV/Vis, um dos fatores que induzem alterações na fibra capilar tingida. Assim, considerando que a radiação UV/Vis atua tanto por mecanismos diretos quanto indiretos, e que alterações significativas de cor foram observadas mesmo quando o nível de radicais livres foi reduzido pela ação da quercetina, deve ser incorporada à formulação fotoprotetora capilar filtros solares associados a antioxidantes nanoestruturados. Tais filtros devem ficar aderidos à cutícula, de modo a protegê-la da degradação proteica e reduzir a entrada de radiação para o interior da fibra capilar, local onde os antioxidantes nanoestruturados devem atuar como uma segunda linha de defesa

The solar radiation, comprising ultraviolet (UV), visible (VIS) and infrared, is responsible for accelerating color and protein content changes in the hair fiber. In order to avoid this problem, this work proposes the incorporation of the flavonoid quercetin, a recognized antioxidant molecule, in a cationic nanoemulsion for hair application. For this, formulations containing quercetin 0.5% (w/w) were developed by the low-energy sub-PIT method. The formulation with a lower polydispersity index (PDI), which had HLB value (Hydrophilic-Lipophilic Balance) equal to 12.5 was selected and subjected to the Normal Stability Test. In this assay, the nanoemulsion was stored under different temperature conditions for 90 days, and the following parameters were analyzed: organoleptic properties, pH, antioxidant activity, quercetin content, average droplet diameter and zeta potential. The photostability of the nanoemulsion involved the determination of the absorption profile and its antioxidant activity after periods of exposure to UV/Vis radiation. Subsequently, the nanoemulsion was characterized according to the following parameters: encapsulation efficiency, rheological profile, morphology of the droplets by Cryogenic Transmission Electron Microscopy and Atomic Force Microscopy (AFM). The possible interaction between quercetin and other surfactants present in the nanoemulsion was evaluated by Confocal Fluorescence Microscopy and thermal analysis. The safety of the nanoemulsion was assessed by the in vitro HET-CAM method and by cutaneous biocompatibility in volunteers. The photoprotection effectiveness of the bioactive cationic nanoemulsion was evaluated in blond (color 12.0) and auburn (color 6.66) dyed hair fibers by assessing the parameters: color, tensile break, combing, friction, protein loss, morphology of cuticles and level of melanin radical by Electron Paramagnetic Resonance Spectroscopy (EPR). The Radical Hair Protection Factor (RHF) was calculated. Dyed hair tresses were exposed to UV/Vis artificial radiation (500 W/m2) for 180 h. The parameters were analyzed before and after the exposure period. The nanoemulsion selected due to its reduced PDI had an average droplet diameter and zeta potential equal to 24.97±0.30 nm and 19.6±2.19 mV, respectively. In the Normal Stability Test, the nanoemulsion stored at 45.0 ± 2.0º C showed significant changes in all parameters except zeta potential, and the increase in the average droplet diameter resulted in the loss of transparency. Oxidation of quercetin and Ostwald ripening instability (ω3) were responsible for the changes. At 5.0 ± 2.0º C, the nanoemulsion kept all parameters unchanged, but at 25.0±2.0º C there was a slight increase in the average droplet diameter without loss of functionality. The nanoemulsion showed high photostability since antioxidant activity was not altered after UV/Vis exposure. The characterization of the nanoemulsion showed that the encapsulation efficiency was 99.8% at least, the formulation showed typical Newtonian behavior and droplets were spherical. The images obtained by Confocal Fluorescence Microscopy and thermal analysis showed that quercetin was within the droplet acting, also, as a cosurfactant, due to the interaction with the surfactants. The nanoemulsion was classified as slightly irritating (HET-CAM method), and this low irritation potential was supported by the cutaneous biocompatibility assay. The photoprotective effectiveness evaluation showed that the nanoemulsion protected the total color (dE*) of blond dyed hair in 54%, but raised the color change of auburn dyed hair in 47% (t = 180 h). In addition, the nanoemulsion improved combability and reduced coefficients of friction. UV/Vis radiation caused high protein loss and reduced cuticle thickness by approximately 50%. It was concluded that the molecules that compose hair dye, especially the darker pigments, acted as sun filters because they protected the protein structures of the hair fiber. The nanoemulsion showed RHF equal to 3.31 and 4.14 for blond and auburn dyed hair, respectively. The RHF indicates the ability of a formulation to reduce the level of free radicals formed by UV/Vis induction, one of the factors that induce changes in the dyed hair fibers. Thus, considering that the UV/Vis radiation acts by direct and indirect mechanisms and that significant changes in color were observed even when the level of free radicals has been reduced by the quercetin, chemical filters should be incorporated into hair formulations associated with nanostructured antioxidants in order to fully protect hair fiber. Such filters must be attached to the cuticle, protecting it from protein degradation and reducing the radiation input into the hair fiber, where the nanostructured antioxidants must act as a second line of defense

[ effect of oral administration of coated methionine on the female goats and suckling kids hair follicles: a histomorphometrical approach]

Using methionine in the diet of the small ruminants can induce the growth of follicles and their fibre growth. In this study, the effect of oral coated methionine on the hair follicles was determined in female Rayeni goats and their breastfed kids during the first 2 months of infancy. For this purpose, 60 healthy singleton born Rayeni goats, approximately 3 to 4 years of age with their one-day-old kids were randomly divided into 4 equal groups. The treated mothers group was given 3 gr/day pure oral methionine manually for 60 days. Skin samples of the 4 groups were taken from the middle of the left and right side, on zero, 30 and 60 days of experience. Routine histological processes were done. In each sample, primary and secondary follicles and skin follicles traits, the diameter of the primary and secondary follicles, the diameter of hair and cashmere, the diameter of dermal papilla of primary and secondary follicles and the number of primary and secondary follicles were measured respectively by linear graticule under light microscope. The diameter and percentages of the cashmere of mothers and kids, the firmness, and the length of the cashmere of kids were measured macroscopically. All data were analyzed with SPSS statistical software. The results showed that the oral coated methionine in the diet of the mothers could significantly increase the diameter of primary and secondary follicles and their dermal papilla. In the treated kids, the diameters of the primary and secondary follicles, the dermal papilla of the primary and secondary follicles and the number of secondary follicles showed significant change. According to the study, the oral coated methionine in the diet of the mothers during the first 2 months of infancy can significantly increase the diameter of primary and secondary follicles and their dermal papilla in the mothers and their treated kids. It can also increase the number of secondary follicles in the kids

La autoevaluación es un método poco confiable para establecer el desarrollo puberal en escolares / Self evaluation is not reliable for assessing puberal development in school-aged children

Introduction: Puberal development assessment (PDA) is performed according Tanner's method (TM). Objective: In order establish the coincidence between PDA determined by physicians and the self-evaluation by school-aged children. Material and Methods: 2 980 school children from Santiago, Chile, were assessed by means of TM, the development of the mammary gland (MD), male genitalia (MG) and pubic hair (PH) were assessed. PDA was simultaneously performed by physicians and by the school children. Results: Concordance between physicians and self assessment showed a kappa coefficient (KC) of 0.55, 0.45, and 0.51 in PH, MD and MG respectively, (acceptable KC > 0.61). Self-evaluation of PDA decreased as the age of children increased, with OR of 0.76 (95 percent IC 0.74 -0.79); 0.87 (95 percent IC 0.83 - 0.91) and 0.92 (95 percent IC 0.88 - 0.96) for PH, MD and MG respectively. An inverse relationship between nutritional status (NS) and PDA was observed only in PH, obese school children underscored their PH (OR 0.6; 95 percent IC 0.5 - 0.7). Multivariate analysis for gender and NS showed that only females overestimate their PH, OR of 1.15 (95 percent IC 1-1.32). Conclusions: PDA through self-assessment yields only moderate correlation coefficients, thus it is not reliable for making relevant clinical decisions.

Introducción: La determinación del desarrollo puberal (DDP) se evalúa según el método de Tanner (MT). Objetivo: Determinar la concordancia de la DDP entre médicos con la autoevaluación en escolares. Pacientes y Métodos: Se examinaron 2 980 escolares de Santiago de Chile. Se evalúo desarrollo mamario (DM), genitales masculinos (GM) y vello púbico (VP) mediante el MT. La DDP fue evaluada simultáneamente por un médico y por los escolares. Resultados: La concordancia entre médicos y la autoevaluación mostró un coeficiente kappa (CK) de 0,55, 0,45, 0,51 en VP, DM y GM respectivamente, (CK aceptable > 0,61). La autoevaluación del DDP disminuyo a medida que aumentaba la edad, con OR respectivos de 0,76 (95 por ciento IC 0,74-0,79); 0,87 (95 por ciento IC 0,83-0,91) y 0,92 (95 por ciento IC 0,88 -0,96) para VP, DM y GM. Se observo una relación inversa entre estado nutricional (EN) y DDP sólo en VP, escolares obesos subestimaban su VP (OR 0,6; 95 por ciento IC 0,5-0,7). El análisis multivariado de género y EN mostró que sólo las mujeres sobreestimaban su VP, OR de 1,15 (95 por ciento IC 1-1,32). Conclusiones: La DDP mediante autoevaluación obtiene coeficientes de correlación sólo moderados que no permiten confiar en este para establecer decisiones clínicas relevantes.

Tratamento hormonal do hirsutismo baseado em evidências / Evidence-based hormonal treatment of hirsutism

A revisão de estudos baseados em evidências mostra o melhor tratamento hormonal para o hirsutismo. Inicialmente, resumiu-se a fisiologia do pelo, caracterizou-se o hirsutismo, suas variantes e suas causas. Revelou-se que o tratamento hormonal do hirsutismo deve ser complementado pelo tratamento cosmético e não deve ser indicado para mulheres grávidas ou que desejam engravidar. A primeira opção é o contraceptivo hormonal oral, seguro para contracepção e eficaz para tratamento do hirsutismo. Após tempo estipulado, não ocorrendo resposta satisfatória, associar acetato de ciproterona ou espironolactona. A finasterida é indicada para hirsutismo idiopático e a flutamida, devido aos efeitos colaterais, ainda não é opção segura

An evidence-based review shows the best hormonal treatment of hirsutism. This paper summarized the physiology of the hair, characterized the hirsutism, its variants and etiologies. The study revealed that hormonal treatment of hirsutism has to be complemented by esthetic treatment, and it is not recommended for pregnant women or for those who want to get pregnant. The first option is hormonal oral contraceptive, which is safe for contraception and effective for treatment of hirsutism. After a established period of treatment, if good results do not occur, the association of cyproterone or spironolactone is recomended. Finasteride is the treatment of idiopathic hirsutism, and flutamide is not a safe option due to its side effects

Evaluation of hair growth activity of Buxus wallichiana Baill extract in rats

The aim of this study was to evaluate antioxidant and hair growth activities of Buxus wallichiana Baill [Buxaceae]. Petroleum ether, chloroform, methanol and aqueous extracts of Buxus wallichiana subjected to antioxidant activity by; 2, 2-diphenyl-1-picryl hydrazyl and nitric oxide methods. Methanol extract of Buxus wallichiana at 50, 100 mg/kg, ointment of methanol extract at 5 and 10% used for the evaluation of hair growth property. Methanol extract showed potential antioxidant activity. Methanol extract at 100 mg/kg showed consistent and significant increase in mean score of hair growth from day 3 to day 24. Whereas 50 mg/kg increased the mean score significantly, only from day 15 to day 24. When methanol extract at 10% applied topically, significant increase in mean hair score observed only from day 15, but at 5% showed considerable increase in mean hair score only from day 21 and 24, when compared to the control. Conclusion The result of this study suggests that Methanol extract of Buxus wallichiana possess good antioxidant and hair growth activity

Comparison of effectiveness of topical tacrolimus and betamethasone with soft paraffin in the treatment of patchy alopecia areata

To compare the effectiveness of Topical Tacrolimus and Betamethasone with soft paraffin in the treatment of patchy alopecia areata. Sixty patients with mild to moderate patchy alopecia areata were evaluated in a non-randomized, open label, intention to treat clinical trial. Patients were assigned to Tacrolimus [n=20] or to Betamethasone [n=20] or to soft paraffin [n=20]. All the three groups were advised to apply the treatment on the affected areas twice a day for 12 consecutive weeks. The primary study outcome was to compare the hair regrowth rate. Efficacy was evaluated at weeks 4, 8 and 12, using hair regrowth score [RGS] with a scale ranging from 0 [regrowth<10%] to 4 [regrowth>75%]. Fifty six subjects [93%] completed the study. At week 12, the RGS was 3.5 +/- 0.11in Betamethasone group [p<0.001], 2.2 +/- 0.15 in Tacrolimus group [p<0.005] and 0.85 +/- 0.08 [ns] in control group respectively. RGS>3 was observed in 70% of patients in Betamethasone group as compared to 45% in Tacrolimus group and none of the patients in control group. Betamethasone is more effective than Tacrolimus in promoting hair regrowth as compared with soft paraffin in patients with mild to moderate patchy alopecia areata

Utilidad y seguridad del 17-alfa-estradiol 0, 025 por ciento versus minoxidil 2 por ciento en el tratamiento de la alopecia androgenética / Usefulness and safety of 0.025 percent 17-alpha-estradiol versus 2 percent minoxidil in the treatment of androgenetic alopecia

Introducción: La calvicie más común es la alopecia androgenética, la cual consiste en una pérdida progresiva del cabello inducida por la acción de los andrógenos a nivel del folículo piloso. Objetivos: Evaluar la utilidad y seguridad del 17-alfa-estradiol al 0,025 por ciento en el tratamiento de la alopecia androgenética. Material y Métodos: Uso de una solución tópica capilar de 17-alfa-estradiol al 0,025 por ciento versus minoxidil al 2 por ciento en solución tópica capilar, durante 12 semanas, en pacientes chilenos con diagnóstico de alopecia androgenética mediante el análisis cuantitativo del videotricograma. Resultados: Se observó una tendencia al aumento de los cabellos en anágeno y disminución de los cabellos en telógeno en los pacientes tratados con 17-alfa-estradiol al 0,025 por ciento en la zona frontoparietal sin aparición de efectos adversos.

Introduction: Androgenetic alopecia is the most common cause of baldness. It consists of progressive hair loss induced by the action of androgens in the hair follicle. Aim: To evaluate usefulness and safety of 0.025 percent 17-alpha-estradiol in the treatment of androgenetic alopecia. Material and Methods: Use of a topic hair solution of 0.025 percent 17-alpha-estradiol versus 2 percent minoxidil topic hair solution for twelve weeks in Chilean patients with clinically diagnosed androgenetic alopecia through quantitative analysis with videotrichogram. Results: Patients treated with 0.025 percent 17-alpha-estradiol showed a tendency to increase the number of hair follicles in anagen phase and a decrease in telogen phase in the frontoparietal zone with no adverse events.

Puberdade precoce: a experiência de um ambulatório de Ginecologia Infanto-Puberal / Precocious puberty: the experience of o Pediatric and Adolescent Gynecology Clinic

OBJETIVO: avaliar os casos com suspeita de puberdade precoce, em relação à classificação diagnóstica e etiológica, atendidos no período compreendido entre os anos de 2000 e 2005. MÉTODOS: foram revisados os prontuários de 58 pacientes com suspeita diagnóstica de puberdade precoce atendidas no período compreendido entre os anos de 2000 e 2005 para análise de dados relevantes. Os critérios de inclusão foram desenvolvimento de mamas e/ou pêlos pubianos antes dos oito anos de idade. As pacientes foram classificadas de acordo com o quadro clínico e os exames complementares em uma das seguintes categorias: puberdade precoce central (PPC), pseudopuberdade precoce, telarca precoce e pubarca precoce. RESULTADOS: dos 58 casos revisados, 28 tiveram diagnóstico de PPC, um de pseudopuberdade precoce, dez de telarca precoce e 19 de pubarca precoce. Todos os casos de PPC foram de origem idiopática, com exceção de uma paciente em que houve ativação do eixo hipotálamo-hipófise-ovariano secundária a hiperplasia adrenal congênita. Houve um caso com suspeita diagnóstica de pseudopuberdade precoce devido à síndrome de McCune-Albright. Todos os casos de telarca precoce foram de origem idiopática, exceto um caso que foi associado a hipotireoidismo primário. Todos os casos de pubarca precoce foram de origem idiopática. CONCLUSÕES: dentre os casos atendidos com diagnóstico de puberdade precoce no período de cinco anos, o diagnóstico final predominante foi PPC e a grande maioria dos casos foi de origem idiopática, havendo baixa incidência de patologias orgânicas.

PURPOSE: to evaluate the classification and the etiology of girls attended in a Pediatric and Adolescent Gynecology Clinic. METHODS: The hospital charts of 58 female patients attended from 2000 to 2005 with diagnosis of probable precocious puberty were reviewed and relevant data analyzed. Inclusion criteria were breast and/or pubic hair growth before eight years old. The girls were classified according to the clinic aspects and the supplementary exams they had been submitted to, into one of the categories: central precocious puberty (CPP), precocious pseudopuberty, premature thelarche and premature pubarche. RESULTS: from the 58 reviewed cases, 28 girls were diagnosed as CPP, one as precocious pseudopuberty, ten as premature thelarche and 19 as premature pubarche. All the cases of CPP had an idiopathic etiology, except for one girl whose activation of the ypothalamic-pituitary-gonadal axis was secondary to congenital adrenal hyperplasia. There was one case of precocious pseudopuberty due to McCune-Albright syndrome. All the cases of premature thelarche had an idiopathic etiology, except for one girl who had primary hypothyroidism. All the cases of premature pubarche had an idiopathic etiology. CONCLUSIONS: among the cases diagnosed as precocious puberty, CPP was the leading diagnosis and most cases had an idiopathic etiology. Organic causes leading to precocious puberty were infrequent.

Experiencia clínica: análisis cuantitativo del cambio de videotricograma en pacientes chilenas con alopecia androgenética en respuesta a la utilización de una formulación a base de aminexil SP94® / Effect of a formulation using Aminexil SP94® in 48 chilean patients with androgenetic alopecia

Durante un período de 12 semanas se realizó un estudio clínico abierto, de tipo prospectivo, con el fin de evaluar la acción de una formulación a base de Aminexil SP94® en 48 pacientes con alopecia androgenética, diagnosticada clínicamente. Fue posible evaluar los efectos de la formulación sobre la fase anágena y telógena mediante la realización de videotricogramas, y conjuntamente se analizaron los efectos de la formulación sobre densidad capilar, sebumetría y presencia de halo-pericapilar. Se observó una mejoría significativa en cada uno de los parámetros medidos. Los efectos adversos se limitaron a la aparición de ardor en sólo un 4 por ciento de las pacientes, lo cual no derivó en la suspensión del tratamiento ni la eliminación del estudio. Se confirma la eficacia y seguridad de la formulación en el tratamiento de alopecia androgenética.

During twelve weeks, an open and prospective clinical study was performed in order to analyze the effect of a formulation using Aminexil SP94® in 48 patients with clinically diagnosed androgenetic alopecia. We evaluated effects during the telogen and anagen phase with video trichogram, and hair density, sebumetry and pericapillary halo were measured as well. There was a significant improvement in each of the parameters studied. Adverse effects were limited to mild itching in 4 percent of the patients. The efficacy and safety of the formulation in the treatment of androgenetic alopecia was confirmed.

effect of antimony on the vision, intraocular pressure and hair growth in a sample of Yemenis with myopia

Clinical trials were performed on a sample of twenty-six Yemenis with myopia to study the effect of antimony eye definer [painter] on vision and intraocular pressure [IOP]. In the first trial each patient applied traditional eye definer containing lead daily for three months, in the second trial each patient applied antimony eye definer daily for three months. Vision parameters including the IOP were measured before and after each trial, and a washout period of one month was kept between the two trials. The results showed that antimony eye definer did not change the power of spherical lenses in both eyes, while it significantly improved the power of cylindrical lenses by 20% in the right eye and 23% in the left eye. Moreover it lowered the IOP by 9% in both eyes, these results were statistically significant. The traditional eye definer containing lead did not change these parameters in the patients. Another trials were formed to the study the effect of antimony ointment 5% on human scalp hair growth, in another sample of healthy volunteers, the results revealed that this ointment has stimulated hair growth by 56%, while the standard trichogenic agent minoxidil 5% solution improved hair growth by 62%. In rabbits the effects were more dramatic, where antimony cream stimulates hair growth by 97%, while the standard trichogenic agent minoxidil 5% solution improved hair growth by 78%. Finally antimony did not show antibacterial effects when tested on streptococci [gram+ve] and E coli [gram-ve]

Aplicabilidad de la escala de Tanner para evaluar el desarrollo del vello púbico en adolescentes peruanos / Tanner' scale in assesment of breast and pubic hair puberal development in peruvian adolescents

Para comprobar si la escala de Tanner, de uso internacional, es o no aplicable para evaluar el desarrollo del vello púbico durante la pubertad en adolescentes peruanos de diferente tipo étnico, se determinó el estadio de este carácter sexual en un grupo de jóvenes de ambos sexos, blancos e indígenas, todos quienes estaban en el estadio 4 de desarrollo genital y mamario. Se hizo lo propio en un grupo de adultos. Los adolescentes indígenas de ambos sexos presentaron un desarrollo significativamente menor del vello púbico que los blancos, y en los indígenas adultos el vello fue también mucho más escaso. La similitud en el rango de edades en que los adolescentes de ambas razas alcanzaron el estadio genital y mamario 4, y la existencia para la edad de la menarquía, apoyan nuestras observaciones previas de que el desarrollo genital y mamario de nuestros jóvenes, cualquiera que sea su tipo étnico, corresponde a la escala de Tanner. Lo mismo ocurre con el vello púbico en la mayoría de nuestros adolescentes blancos. Nuestros hallazgos en los adultos indican que el atraso es definitivo en un alto porcentaje de indigenas. Se postula que las diferencias encontradas se deberían a una baja respuesta de la unidad pilosebácea del indígena ante un estímulo hormonal normal. Se concluye que la escala de Tanner no es aplicable para evaluar el desarrollo del vello púbico durante la pubertad en adolescentes peruanos de raza indígena, recomendándose guiarse por los otros caracteres sexuales secundarios para estimar el avance de su desarrollo puberal.

Transplante de supercílios utilizando seringa de insulina modificada / Supercilliary graft transplants using a modified insulin syringe

Apresentamos uma seringa de insulina modificada para transplante fio a fio de supercílio

Cabello crespo adquirido progresivo: una tricogrifosis adquirida / Acquired progressive unruly hair: an acquired trichogriphosis

Se presenta un caso de cabello crespo adquirido progresivo. Se corrobora la presencia de los pili canaliculati y la disminución de la velocidad de crecimiento del pelo en las zonas afectadas. Se ubica a la afección entre otras relacionadas y se sugiere la posibilidad de denominarlas en común: tricogrifosis