Avaliação da rotulagem de cosméticos clareadores de pele comercializados em Juazeiro, Bahia, Brasil / Evaluation of the labeling of skin lightening cosmetics marketed in Juazeiro, Bahia, Brazil

A hiperpigmentação da pele, principalmente na região facial, resulta em um incômodo estético que afeta a qualidade de vida do indivíduo, levando a busca por produtos clareadores. Este estudo avaliou a conformidade dos rótulos de cosméticos comercializados como "produtos clareadores de pele", bem como a existência de substâncias clareadoras proibidas neste tipo de produto. Foi realizada uma análise transversal descritiva qualitativa no período de abril a maio de 2022, em busca por cosméticos comercializados em estabelecimentos farmacêuticos e lojas de produtos cosméticos localizadas no município de Juazeiro/BA. Foram selecionados 18 produtos e os desvios de rotulagem identificados com base na legislação utilizada vigente à época do estudo, foram: ausência de informações sobre advertências/restrições de uso e número de registro incompleto, equivalente a 16,7% (n = 3) das amostras. A hidroquinona, proibida nesse tipo de produto, foi encontrada em um cosmético (5,5%). Embora a maioria das amostras analisadas esteja em conformidade com as exigências legais, os resultados evidenciam descumprimentos, indicando a necessidade de uma fiscalização mais rigorosa a fim de evitar possíveis danos à saúde do usuário. (AU)

Skin hyperpigmentation, particularly in the facial region, can be an aesthetic nuisance that affects an individual's quality of life, leading them to seek out whitening products. This study evaluated the compliance of cosmetics labels marketed as "skin lightening products", and assessed the presence of whitening substances prohibited in this type of product. A qualitative, descriptive, cross-sectional analysis was conducted between April and May 2022 in Juazeiro, Bahia, Brazil, focusing on cosmetics sold in pharmaceutical establishments and cosmetic product stores. Eighteen products were selected, and labeling deviations identified based on the legislation in force at the time of the study. These included a lack of information on warnings/use restrictions and incomplete registration numbers, affecting 16.7% (n = 3) of the samples. Hydroquinone, prohibited in this type of product by the legislation, was detected in one cosmetic (5.5%). Although most of the analyzed samples comply with legal requirements, the observed non-compliance highlights the need for more stringent inspection to prevent potential harm to user's health. (AU)

Avaliação da rotulagem de cosméticos clareadores de pele comercializados em Juazeiro, Bahia, Brasil / Evaluation of the labeling of skin lightening cosmetics marketed in Juazeiro, Bahia, Brazil

A hiperpigmentação da pele, principalmente na região facial, resulta em um incômodo estético que afeta a qualidade de vida do indivíduo, levando a busca por produtos clareadores. Este estudo avaliou a conformidade dos rótulos de cosméticos comercializados como "produtos clareadores de pele", bem como a existência de substâncias clareadoras proibidas neste tipo de produto. Foi realizada uma análise transversal descritiva qualitativa no período de abril a maio de 2022, em busca por cosméticos comercializados em estabelecimentos farmacêuticos e lojas de produtos cosméticos localizadas no município de Juazeiro/BA. Foram selecionados 18 produtos e os desvios de rotulagem identificados com base na legislação utilizada vigente à época do estudo, foram: ausência de informações sobre advertências/restrições de uso e número de registro incompleto, equivalente a 16,7% (n = 3) das amostras. A hidroquinona, proibida nesse tipo de produto, foi encontrada em um cosmético (5,5%). Embora a maioria das amostras analisadas esteja em conformidade com as exigências legais, os resultados evidenciam descumprimentos, indicando a necessidade de uma fiscalização mais rigorosa a fim de evitar possíveis danos à saúde do usuário.

Skin hyperpigmentation, particularly in the facial region, can be an aesthetic nuisance that affects an individual's quality of life, leading them to seek out whitening products. This study evaluated the compliance of cosmetics labels marketed as "skin lightening products", and assessed the presence of whitening substances prohibited in this type of product. A qualitative, descriptive, cross-sectional analysis was conducted between April and May 2022 in Juazeiro, Bahia, Brazil, focusing on cosmetics sold in pharmaceutical establishments and cosmetic product stores. Eighteen products were selected, and labeling deviations identified based on the legislation in force at the time of the study. These included a lack of information on warnings/use restrictions and incomplete registration numbers, affecting 16.7% (n = 3) of the samples. Hydroquinone, prohibited in this type of product by the legislation, was detected in one cosmetic (5.5%). Although most of the analyzed samples comply with legal requirements, the observed non-compliance highlights the need for more stringent inspection to prevent potential harm to user's health.

Inhibitory effect of Gastrodia elata Blume extract on alpha-melanocyte stimulating hormone-induced melanogenesis in murine B16F10 melanoma

BACKGROUND/OBJECTIVES: Gastrodia elata Blume (GEB), a traditional herbal medicine, has been used to treat a wide range of neurological disorders (e.g., paralysis and stroke) and skin problems (e.g., atopic dermatitis and eczema) in oriental medicine. This study was designed to investigate whether GEB extract inhibits melanogenesis activity in murine B16F10 melanoma. MATERIALS/METHOD: Murine B16F10 cells were treated with 0-5 mg/mL of GEB extract or 400 µg/mL arbutin (a positive control) for 72 h after treatment with/without 200 nM alpha-melanocyte stimulating hormone (α-MSH) for 24 h. Melanin concentration, tyrosinase activity, mRNA levels, and protein expression of microphthalmia-associated transcription factor (MITF), tyrosinase, tyrosinase-related protein (Trp)1, and Trp2 were analyzed in α-MSH-untreated and α-MSH-treated B16F10 cells. RESULTS: Treatment with 200 nM α-MSH induced almost 2-fold melanin synthesis and tyrosinase activity along with increased mRNA levels and protein expression of MITF, tyrosinase, Trp1 and Trp2. Irrespective of α-MSH stimulation, GEB extract at doses of 0.5-5 mg/mL inhibited all these markers for skin whitening in a dose-dependent manner. While lower doses (0.5-1 mg/mL) of GEB extract generally had a tendency to decrease melanogenesis, tyrosinase activity, and mRNA levels and protein expression of MITF, tyrosinase, Trp1, and Trp2, higher doses (2-5 mg/mL) significantly inhibited all these markers in α-MSH-treated B16F10 cells in a dose-dependent manner. These inhibitory effects of the GEB extract at higher concentrations were similar to those of 400 µg/mL arbutin, a well-known depigmenting agent. CONCLUSIONS: These results suggest that GEB displays dose-dependent inhibition of melanin synthesis through the suppression of tyrosinase activity as well as molecular levels of MITF, tyrosinase, Trp1, and Trp2 in murine B16F10 melanoma. Therefore, GEB may be an effective and natural skin-whitening agent for application in the cosmetic industry.

Activities of different types of Thai honey on pathogenic bacteria causing skin diseases, tyrosinase enzyme and generating free radicals

BACKGROUND: Honey is a natural product obtained from the nectar that is collected from flowers by bees. It has several properties, including those of being food and supplementary diet, and it can be used in cosmetic products. Honey imparts pharmaceutical properties since it has antibacterial and antioxidant activities. The antibacterial and antioxidant activities of Thai honey were investigated in this study. RESULTS: The honey from longan flower (source No. 1) gave the highest activity on MRSA when compared to the other types of honey, with a minimum inhibitory concentration of 12.5% (v/v) and minimum bactericidal concentration of 25% (v/v). Moreover, it was found that MRSA isolate 49 and S. aureus were completely inhibited by the 50% (v/v) longan honey (source No. 1) at 8 and 20 hours of treatment, respectively. Furthermore, it was observed that the honey from coffee pollen (source No. 4) showed the highest phenolic and flavonoid compounds by 734.76 mg gallic/kg of honey and 178.31 mg quercetin/kg of honey, respectively. The antioxidant activity of the honey obtained from coffee pollen was also found to be the highest, when investigated using FRAP and DPPH assay, with 1781.77 mg FeSO4•7H2O/kg of honey and 86.20 mg gallic/kg of honey, respectively. Additionally, inhibition of tyrosinase enzyme was found that honey from coffee flower showed highest inhibition by 63.46%. CONCLUSIONS: Honey demonstrates tremendous potential as a useful source that provides anti-free radicals, anti-tyrosinase and anti-bacterial activity against pathogenic bacteria causing skin diseases.

Etude des complications de la peau a Nouakchott; Mauritanie

Dans le but d'etudier les complications de la DA en Mauritanie; nous avons mene une enquete transversale descriptive chez les femmes consultant dans le service de Dermatologie du CHN de Nouakchott de Juillet a Septembre 2012. L'objectif de l'etude etait de determiner la prevalence des complications de la DA. Sur les 394 malades ayant consulte durant la periode d'etude; nous avons recense 164 utilisatrices de produits depigmentant. L'age moyen des utilisatrices de DA est de 30;38 ans avec des extremes de 13 et 70 ans. Les niveaux d'etude les plus representes sont le primaire dans 40;2 et le secondaire dans 41;5. La majorite des utilisatrices sont de l'ethnie maure blanc dans 34;8suivi de l'ethnie pulaar dans 26;8. 56 des patientes sont mariees suivi des celibataires dans 24. 52 des patientes mariees affirment que leurs conjoints desapprouvent cette pratique. 49;4 des patientes s'adonnent a la DA pour etre belle. 96;3 de ces utilisatrices avaient une ou plusieurs complications. Les complications notees lors de cette etude sont a type de dermatophyties (30;5); de folliculites superficielles ou profondes (7;9); de dermohypodermites bacteriennes (erysipele : 2;4); d'ochronose exogene (26;2); de taches noires (83;5. La principale motivation est esthetique (49;4). Parmi les utilisatrices; 73;8 connaissent les effets secondaires sans que cela ne les dissuadent de cette pratique. Le plus souvent ces effets secondaires ne motivent pas une consultation et sont bien supportes par les patients qui les acceptent en tan t que rancon de la DA. Malgre la prevalence elevee de sujets a peau claire en Mauritanie la DA reste une pratique courante

KHG26792 Inhibits Melanin Synthesis in Mel-Ab Cells and a Skin Equivalent Model

The purpose of this study is to characterize the effects of KHG26792 (3-(naphthalen-2-yl(propoxy) methyl)azetidine hydrochloride), a potential skin whitening agent, on melanin synthesis and identify the underlying mechanism of action. Our data showed that KHG26792 significantly reduced melanin synthesis in a dose-dependent manner. Additionally, KHG26792 downregulated microphthalmia-associated transcription factor (MITF) and tyrosinase, the rate-limiting enzyme in melanogenesis, although tyrosinase was not inhibited directly. KHG26792 activated extracellular signal-regulated kinase (ERK), whereas an ERK pathway inhibitor, PD98059, rescued KHG26792-induced hypopigmentation. These results suggest that KHG26792 decreases melanin production via ERK activation. Moreover, the hypopigmentary effects of KHG26792 were confirmed in a pigmented skin equivalent model using Cervi cornus Colla (deer antler glue), in which the color of the pigmented artificial skin became lighter after treatment with KHG26792. In summary, our findings suggest that KHG26792 is a novel skin whitening agent.

Experimental study on removal melanin granules from acellular dermal matrix of giant nevus / 中华整形外科杂志

<p><b>OBJECTIVE</b>To study the possibility of removal melanin granules from autogenic acellular dermal matrix of giant nevus tissue by H2O2 bleaching technique.</p><p><b>METHODS</b>A total of 32 skin specimens (0.5 cm x 0.5 cm) from giant nevus tissue and 1 piece (0.5 cm x 0.5 cm) of normal skin were obtained from the surgical removal. One giant nevus tissue was chosen as control. The others and the normal skin tissue were treated with solution of 0.25% Dispase II for digestion for 24 hours under normal temperature to remove epidermis. Then each piece was immerged into solution of 0.5% Triton X-100 for digestion for 48 hours in normal temperature. One giant nevus tissue and the normal skin tissue were chosen as control. The others were immerged into solution of different concentrations of H2O2, treated under different temperature and lasting for different period. Lastly, all specimens were treated with HE staining, immunohistochemical staining, light microscopy and so on.</p><p><b>RESULTS</b>After giant nevus tissues were treated with solution of 0.25% Dispase II and immerged into solution of 0.5% Triton X-100 in normal temperature, nevus cells and all other cellular components of pigmented nevus tissues can be effectively removed, there were the cavities left by removal of cells without any residual cell debris, but still remaining part of pigment. Then each specimen were immerged into solution of different concentrations of H2O2, under different temperature and lasting for different period which can remove residual melanin granules. In solution of 3% H2O2 for 36 h under 37 degrees C, can remove all the melanin particles, the content of collagen type I in the obtained specimen was not changed. Collagen fibers were uniform in thickness, regular in arrangement with no obvious degeneration.</p><p><b>CONCLUSIONS</b>With solution of 0.25% Dispase II and solution of 0.5% Triton X-100 in normal temperature, all cells in nevus tissue can be removed effectively. Further treatment with 3% H2O2 at 37 degrees C for 36 h can remove all the melanin particles, while collagen type I has no obvious change. The preparation of acellular dermal matrix of the giant nevus may possibly be applied as autologous tissue implant to repair tissue defects.</p>

'Fishy' make-up on the hook for mercury exposure: a case series / Maquillaje 'sospechoso' de anzuelo para la exposición al mercurio: un estudio de serie de casos

OBJECTIVE: This report examines the source and outcome of four Barbadian women with extremely high hair mercury concentrations (361-5617 ug/g inorganic mercury) due to topical application of mercury containing skin-lightening cosmetics. METHODS: Inorganic hair and urine mercury analysis was done at the toxicological centre laboratory of the Institut National de Santé Publique du Québec (Standard Council of Canada accredited). The clinical examinations were performed on location at the Queen Elizabeth Hospital of Barbados. RESULTS: Urine samples [7-135 ug/L, normal < 2 ug/L] revealed elevated mercury concentrations signifying systemic exposure. Reported symptoms during the clinical examination were consistent but nonspecific to chronic mercury exposure. CONCLUSION: Evidently, cosmetics containing dangerous levels of mercury are still available for purchase in Barbados and should be entirely banned.

OBJETIVO: Este reporte examina la fuente y evolución clínica de cuatro mujeres barbadenses con concentraciones de mercurio extremadamente altas (mercurio inorgánico de 361-5617 ug/g) en el pelo debido a la aplicación tópica de cosméticos para el aclaramiento de la piel, que contienen mercurio. MÉTODOS: Se realizó un análisis del mercurio inorgánico en el cabello y la orina, en el laboratorio del centro toxicológico del Institut National de Santé Publique du Quebec (acreditado por el Consejo de Normalización de Canadá). Los exámenes clínicos fueron realizados en el Hospital Queen Elizabeth de Barbados. RESULTADOS: Las muestras de orina [7-135 ug/L, normal < 2 ug/L] revelaron concentraciones elevadas de mercurio, indicando una exposición sistémica. Los síntomas reportados durante el examen clínico se correspondían, aunque no deforma específica, con una exposición crónica al mercurio. CONCLUSIÓN: Evidentemente, cosméticos que contienen niveles peligrosos de mercurio se hallan todavía disponibles a la venta en Barbados, y deben ser totalmente prohibidos.

Human Exposure and Health Effects of Inorganic and Elemental Mercury / 예방의학회지

Mercury is a toxic and non-essential metal in the human body. Mercury is ubiquitously distributed in the environment, present in natural products, and exists extensively in items encountered in daily life. There are three forms of mercury, i.e., elemental (or metallic) mercury, inorganic mercury compounds, and organic mercury compounds. This review examines the toxicity of elemental mercury and inorganic mercury compounds. Inorganic mercury compounds are water soluble with a bioavailability of 7% to 15% after ingestion; they are also irritants and cause gastrointestinal symptoms. Upon entering the body, inorganic mercury compounds are accumulated mainly in the kidneys and produce kidney damage. In contrast, human exposure to elemental mercury is mainly by inhalation, followed by rapid absorption and distribution in all major organs. Elemental mercury from ingestion is poorly absorbed with a bioavailability of less than 0.01%. The primary target organs of elemental mercury are the brain and kidney. Elemental mercury is lipid soluble and can cross the blood-brain barrier, while inorganic mercury compounds are not lipid soluble, rendering them unable to cross the blood-brain barrier. Elemental mercury may also enter the brain from the nasal cavity through the olfactory pathway. The blood mercury is a useful biomarker after short-term and high-level exposure, whereas the urine mercury is the ideal biomarker for long-term exposure to both elemental and inorganic mercury, and also as a good indicator of body burden. This review discusses the common sources of mercury exposure, skin lightening products containing mercury and mercury release from dental amalgam filling, two issues that happen in daily life, bear significant public health importance, and yet undergo extensive debate on their safety.

A descriptive study on the treatment strategies for melasma used in the Philippines

OBJECTIVE: To investigate the different treatment modalities employed for melasma by practicing dermatologists in the Philippines. BACKGROUND: Melasma is a prevalent skin condition among Filipinos due to our skin type and climate. To date, no local studies have been done investigating the different treatment regimens practiced/ employed by Filipino dermatologists in treating melasma. METHODS: This is a descriptive study investigating the different treatment strategies used by Filipino dermatologists using a questionnaire.The questionnaires were given to practicing Filipino dermatologists personally during conferences and conventions held in 2005 as well as to the different Philippine Dermatological Society accredited training institutions and private clinics of the doctors. The total sample size was 117. RESULTS: Melasma is frequently seen among Fitzpatrick skin type IV (50%),females, 41-50 year-old age group (50%) and commonly on the cheeks (98%). Grade 2 severity melasma was often seen by 75% of the respondents. The top 3 topical depigmenting agents of choice are tretinoin, hydroquinone and combination therapy. Microdermabrasion was preferred by 43.5% of the respondents over laser. Once combination treatment regimens fail, laser treatment more than doubled to 28.7%. Vitamin C (37.7%) and glutathione (31.6%) are the most common oral maintenance therapy given by the respondents. Half of all the respondents advise continuous maintenance therapy while a third of them advise maintenance for a year. The most common side effect of melasma treatment is erythema according to 51% of the respondents followed largely by hyperpigmentation (23%) and scaling (22%). More than half of the dermatologists surveyed stop the treatment regimen when side effects are observed. Almost all respondents advise patients to use sunblock daily and majority of respondents prescribe both UVB and UVA sunblocks.

Melasma

Melasma is a common acquired symmetric hypermelanosis characterized by irregular light to dark brown macules and patches on sunexposed areas of the skin. Its histopathologic characteristics are important for treatment. Melasma is characterized by epidermal hyperpigmentation possibly by both the increased number of melanocytes and the increased function of melanogenic enzymes over the dermal solar changes. Until now, curative measures are not available for melasma. Current therapies include topical agents (retinoic acid, hydroquinone, steroids), peeling (Combes solution, glycolic acid, TCA), and lasers(Co2, Erbium-Yag, Q-switched).