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https://www.readbyqxmd.com/read/27913787/safety-assessment-of-polyquaternium-22-and-polyquarternium-39-as-used-in-cosmetics
#1
Wilbur Johnson, Bart Heldreth, Wilma F Bergfeld, Donald V Belsito, Ronald A Hill, Curtis D Klaassen, Daniel C Liebler, James G Marks, Ronald C Shank, Thomas J Slaga, Paul W Snyder, F Alan Andersen
Polyquaternium-22 and polyquaternium-39 are polymers that function as antistatic agents, film formers, and hair fixatives in cosmetic products. These ingredients are being used at concentrations up to 2% (polyquaternium-22, in a rinse-off product) and up to 3% (polyquaternium-39, in rinse-off and leave-on products). The unreacted monomer content of these ingredients was considered low and of no toxicological concern. Limited data showed no skin irritation/sensitization. Although these ingredients were nongenotoxic in bacterial assays, mammalian genotoxicity, carcinogenicity, and reproductive and developmental toxicity data were not available...
November 2016: International Journal of Toxicology
https://www.readbyqxmd.com/read/27913772/safety-assessment-of-formic-acid-and-sodium-formate-as-used-in-cosmetics
#2
Wilbur Johnson, Bart Heldreth, Wilma F Bergfeld, Donald V Belsito, Ronald A Hill, Curtis D Klaassen, Daniel C Liebler, James G Marks, Ronald C Shank, Thomas J Slaga, Paul W Snyder, F Alan Andersen
Formic acid functions as a fragrance ingredient, preservative, and pH adjuster in cosmetic products, whereas sodium formate functions as a preservative. Because of its acidic properties, formic acid is a dermal and ocular irritant. However, when used as a pH adjuster in cosmetic formulations, formic acid will be neutralized to yield formate salts, for example, sodium formate, thus minimizing safety concerns. Formic acid and sodium formate have been used at concentrations up to 0.2% and 0.34%, respectively, with hair care products accounting for the highest use concentrations of both ingredients...
November 2016: International Journal of Toxicology
https://www.readbyqxmd.com/read/27913771/safety-assessment-of-methyl-glucose-polyethers-and-esters-as-used-in-cosmetics
#3
Wilbur Johnson, Bart Heldreth, Wilma F Bergfeld, Donald V Belsito, Ronald A Hill, Curtis D Klaassen, Daniel C Liebler, James G Marks, Ronald C Shank, Thomas J Slaga, Paul W Snyder, F Alan Andersen
The Cosmetic Ingredient Review Expert Panel (Panel) reviewed the safety of methyl glucose polyethers and esters which function in cosmetics as skin/hair-conditioning agents, surfactants, or viscosity increasing agents. The esters included in this assessment are mono-, di-, or tricarboxyester substituted methyl glucosides, and the polyethers are mixtures of various chain lengths. The Panel reviewed available animal and clinical data, including the molecular weights, log Kows, and other properties in making its determination of safety on these ingredients...
November 2016: International Journal of Toxicology
https://www.readbyqxmd.com/read/27910904/melanosome-transfer-to-keratinocyte-in-the-chicken-embryonic-skin-is-mediated-by-vesicle-release-associated-with-rho-regulated-membrane-blebbing
#4
Ryosuke Tadokoro, Hidetaka Murai, Ken-Ichiro Sakai, Takahiro Okui, Yasuhiro Yokota, Yoshiko Takahashi
During skin pigmentation in amniotes, melanin synthesized in the melanocyte is transferred to keratinocytes by a particle called the melanosome. Previous studies, mostly using dissociated cultured cells, have proposed several different models that explain how the melanosome transfer is achieved. Here, using a technique that labels the plasma membrane of melanocytes within a three-dimensional system that mimics natural tissues, we have visualized the plasma membrane of melanocytes with EGFP in chicken embryonic skin...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27899137/ethnobotanical-survey-of-cosmetic-plants-used-in-marquesas-islands-french-polynesia
#5
Xénia Jost, Jean-Luc Ansel, Gaël Lecellier, Phila Raharivelomanana, Jean-François Butaud
BACKGROUND: Cosmetic plants and their uses have often been neglected in ethnobotanical surveys which focus mainly on plants with medicinal or food uses. Thus, this survey was carried out to specifically investigate cosmetics in a small community and to establish a cosmetopoeia, based on the model of pharmacopoeia for medicinal plants. The geographic spread of the survey covered the Marquesas Islands, one of the five archipelagos of French Polynesia (Pacific Ocean). This archipelago was also recently investigated for its pharmacopoeia...
November 29, 2016: Journal of Ethnobiology and Ethnomedicine
https://www.readbyqxmd.com/read/27882588/clinical-and-epidemiological-analysis-in-149-cases-of-rhododendrol-induced-leukoderma
#6
Momoko Yoshikawa, Yasuyuki Sumikawa, Tokimasa Hida, Takafumi Kamiya, Kimi Kase, Yasue Ishii-Osai, Junji Kato, Yuji Kan, Shiori Kamiya, Yuki Sato, Toshiharu Yamashita
Rhododendrol-induced leukoderma is an acquired depigmentation that develops mainly at the contact site after repeated use of skin-whitening cosmetics containing rhododendrol. In most cases, cessation of further depigmentation or occurrence of repigmentation is observed after discontinuing the use of cosmetics. However, some patients develop vitiligo vulgaris through the spread of depigmentation into the non-exposed areas. Our study aims to investigate the patient-specific factors that may affect the extent of depigmentation or repigmentation, as well as development of vitiligo vulgaris...
November 24, 2016: Journal of Dermatology
https://www.readbyqxmd.com/read/27802065/a-review-on-laser-and-light-based-therapies-for-alopecia-areata
#7
Stephanie Mlacker, Adam Souhail Aldahan, Brian James Simmons, Vidhi Shah, Colin Andrew McNamara, Sahal Samarkandy, Keyvan Nouri
Alopecia areata is a form of non-scarring alopecia that results from a hyperactive immune response of T cells against hair follicles. Many patients with visible hair loss experience psychological and emotional distress, as a result of their cosmetic disfigurement, and frequently seek treatment. However, existing treatment methods, such as corticosteroids, topical irritants, sensitizing agents, immunosuppressants, and psoralen plus ultraviolet light A may result in various adverse effects and often lack efficacy...
November 1, 2016: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/27797711/influence-of-body-mass-index-on-hair-ethyl-glucuronide-concentrations
#8
Cleo L Crunelle, Hugo Neels, Kristof Maudens, Mireille De Doncker, Delphine Cappelle, Frieda Matthys, Geert Dom, Erik Fransen, Peter Michielsen, Steven De Keukeleire, Adrian Covaci, Michel Yegles
AIM: Analysis of ethyl glucuronide (EtG) concentrations in hair is increasingly used to estimate the consumption of alcohol of the prior months. Linear correlations between the amount of alcohol consumed and the concentration of EtG in hair have been reported, and several variables that may influence this correlation have been investigated: e.g. cosmetic hair treatments, gender influences or hair color. Here, we investigate the influence of body mass index (BMI) on this correlation. METHODS: A post hoc analysis on the influence of BMI on the relation between amounts of alcohol consumed and the measured EtG concentrations in hair in 199 participants...
October 20, 2016: Alcohol and Alcoholism: International Journal of the Medical Council on Alcoholism
https://www.readbyqxmd.com/read/27752680/a-new-oil-membrane-approach-for-integrated-sweat-sampling-and-sensing-sample-volumes-reduced-from-%C3%AE-l-s-to-nl-s-and-reduction-of-analyte-contamination-from-skin
#9
R Peng, Z Sonner, A Hauke, E Wilder, J Kasting, T Gaillard, D Swaille, F Sherman, X Mao, J Hagen, R Murdock, J Heikenfeld
Wearable sweat biosensensing technology has dominantly relied on techniques which place planar-sensors or fluid-capture materials directly onto the skin surface. This 'on-skin' approach can result in sample volumes in the μL regime, due to the roughness of skin and/or due to the presence of hair. Not only does this increase the required sampling time to 10's of minutes or more, but it also increases the time that sweat spends on skin and therefore increases the amount of analyte contamination coming from the skin surface...
October 18, 2016: Lab on a Chip
https://www.readbyqxmd.com/read/27749618/clinical-presentation-and-bacteriology-of-eyebrow-infections-the-massachusetts-eye-and-ear-infirmary-experience-2008-2015
#10
Anaïs L Carniciu, Jonathan Chou, Ilya Leskov, Suzanne K Freitag
PURPOSE: This study retrospectively reviews preseptal cellulitis and abscesses involving the eyebrow to elucidate the bacteriology and potential causative factors. METHODS: A retrospective chart review was conducted to identify patients who had been diagnosed with preseptal cellulitis or abscess involving the eyebrow at the Massachusetts Eye and Ear Infirmary between 2008 and 2015. Demographic, clinical, and microbiological data were collected. RESULTS: Eighty patients with eyebrow infections were identified, of whom 49 (61...
October 5, 2016: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27697004/intense-pulsed-light-from-the-past-to-the-future
#11
Dan Li, Shi-Bin Lin, Biao Cheng
BACKGROUND: For 20 years, intense pulsed light (IPL) technology has been used to treat various medical problems. IPL has since developed rapidly, becoming popular among patients worldwide. Recently, IPL has been used mainly for cosmetic purposes. Researchers are constantly seeking new applications of IPL to meet the increasing needs of patients. OBJECTIVE: This review summarizes the development of IPL devices, discusses the current literature on the clinical application of IPL to increase our understanding of IPL, and provides guidance for broadening its clinical applications...
October 2016: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/27676382/biosynthesis-of-silver-nanoparticles-using-aqueous-extract-of-silky-hairs-of-corn-and-investigation-of-its-antibacterial-and-anticandidal-synergistic-activity-and-antioxidant-potential
#12
Jayanta Kumar Patra, Kwang-Hyun Baek
This paper investigated the green synthesis of silver nanoparticles (AgNPs) using aqueous extract of silky hairs of corn (Zea mays L.) which is a waste material of the crop, as both a reducing and stabilising/capping agent. The AgNPs were characterised by UV-visible spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), thermogravimetric analysis (TGA), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The average size of AgNPs was found to be 249...
October 2016: IET Nanobiotechnology
https://www.readbyqxmd.com/read/27669632/a-global-assessment-of-phthalates-burden-and-related-links-to-health-effects
#13
Ioanna Katsikantami, Stavros Sifakis, Manolis N Tzatzarakis, Elena Vakonaki, Olga-Ioanna Kalantzi, Aristidis M Tsatsakis, Apostolos K Rizos
Phthalates are ubiquitous environmental contaminants which are used in industry as plasticizers and additives in cosmetics. They are classified as Endocrine Disrupting Chemicals (EDCs) which impair the human endocrine system inducing fertility problems, respiratory diseases, childhood obesity and neuropsychological disorders. The aim of this review is to summarize the current state of knowledge on the toxicity that phthalates pose in humans based on human biomonitoring studies conducted over the last decade...
September 23, 2016: Environment International
https://www.readbyqxmd.com/read/27663154/cutaneous-mycobacterium-abscessus-infection-following-hair-transplant
#14
K Eustace, V Jolliffe, A Sahota, K Gholam
A 28-year-old man presented with a 10-day history of scalp nodules. He had undergone hair transplantation 2 months previously. Incision and drainage of one of the nodules yielded gelatinous material, which was sent for microscopy and culture, including low-temperature culture. After 2 weeks of incubation, culture of the nodule yielded acid- and alcohol-fast bacilli, which were identified as Mycobacterium abscessus, a rapidly growing, nontuberculous mycobacterium, which has been reported to cause cutaneous, soft tissue and respiratory infections following trauma, surgery or injection with nonsterile needles...
October 2016: Clinical and Experimental Dermatology
https://www.readbyqxmd.com/read/27660477/effect-of-the-multifunctional-cosmetic-ingredient-sphinganine-on-hair-loss-in-males-and-females-with-diffuse-hair-reduction
#15
Nicole Gerlach, Matthias Mentel, Tim Köhler, Benjamin Tuchscherer, Birgit Garbe, Jasmina Ülker, Hagen Tronnier, Ulrike Heinrich, Mike Farwick
Sphingolipids are well known to promote keratinocyte differentiation and to induce ceramide production. In addition, they show anti-inflammatory and antimicrobial activities. Thus, the aim of this study is to investigate the potential effect of sphinganine on prolonging the hair anagen rate and improving the overall hair quality and scalp health. The inhibitory potential of sphinganine toward 5-α-reductase was studied using an in vitro assay. The stimulation of the antimicrobial peptide HBD2 by sphinganine was measured by real-time polymerase chain reaction and immunostaining...
2016: Clinical, Cosmetic and Investigational Dermatology
https://www.readbyqxmd.com/read/27659896/pregnancy-and-the-hair-growth-cycle-anagen-induction-against-hair-growth-disruption-using-nourkrin-%C3%A2-with-marilex-%C3%A2-a-proteoglycan-replacement-therapy
#16
Erling Thom
Postpartum effluvium is a well-known clinical fact. However, following some minor research activities in the 1960s, very little has happened on the research front of the subject. It was hypothesized that postpartum hair loss might be a manifestation of a change in the hair growth cycle occurring normally during pregnancy. Recently, new research has been published trying to explain the mechanism of action behind this frequently occurring hair growth disruption, and to develop a functional treatment schedule and regime...
September 23, 2016: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/27649771/human-hair-reconstruction-close-but-yet-so-far
#17
Parvaneh Mohammadi, Khalil Kass Youssef, Saeed Abbasalizadeh, Hossein Baharvand, Nasser Aghdami
Billions of dollars are annually invested in pharmaceutical industry and cosmetic sector with intent to develop new drugs and treatment strategies for alopecia. Because the hair looks an important characteristic of humans-an effective appendage in perception, expression of beauty, and preservation of self-esteem-the global market for hair loss treatment products is exponentially increasing. However, current methods to treat hair loss endure yet multiple challenges, such as unfavorable outcomes, nonpermanent and patient-dependent results, as well as unpredictable impacts, which limit their application...
December 1, 2016: Stem Cells and Development
https://www.readbyqxmd.com/read/27642030/cutaneous-adverse-events-of-new-anti-melanoma-therapies-classification-and-management
#18
S J E Hwang, R Anforth, G Carlos, P Fernandez-Peñas
Over the past decade, targeted therapies such as BRAF inhibitors, MEK inhibitors and immunotherapies such as anti-CTLA4 and anti-PD1 antibodies have emerged as novel treatments of advanced melanoma. Along with increased use of these therapies, a range of cutaneous adverse events have also emerged, varying from more serious and frequent cutaneous squamous cell carcinoma to mere cosmetic changes such as curly hair or rare severe toxic epidermal necrolysis. Early detection and management of these cutaneous adverse events will aid patients to receive accurate treatment, avoid unnecessary discontinuation of anti-tumour treatment and improve the patient's overall quality of life...
September 15, 2016: Actas Dermo-sifiliográficas
https://www.readbyqxmd.com/read/27613289/assessment-of-metals-in-cosmetics-commonly-used-in-saudi-arabia
#19
Ahmed K Salama
Cosmetics are one of the most important sources of releasing heavy metals. Different varieties of chemicals are used in cosmetic products as ingredients and some are used as preservatives. There are concerns regarding the presence of harmful chemicals in these products. Among the harmful chemicals, cosmetic products contain heavy metals. The present study was conducted to determine the content of certain heavy metals in the products made in different countries and marketed in Saudi Arabia. Thirty-one products of different brands or misbrands of commonly used cosmetic products (hair cream, beauty cream, skin cream, hair food formula, hair gel, whitening daily scrub, shampoo, shower gel, body care, body lotion, hand wash, daily fairness, shaving cream, toothpaste, germ and beauty soap, and cream soap) were purchased from local markets of Saudi Arabia...
December 0: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27601867/scanning-electron-microscopy-study-of-hair-shaft-damage-secondary-to-cosmetic-treatments-of-the-hair
#20
Feroze Kaliyadan, B B Gosai, Walid Naief Al Melhim, Kaberi Feroze, Habib Ahmad Qureshi, Sayed Ibrahim, Joel Kuruvilla
INTRODUCTION AND BACKGROUND: Cosmetic procedures for hair, such as bleaching, dyeing, and straightening, are commonly used around the world. It has been suggested that excessive use of such procedures can cause damage to the hair shaft. We aimed to assess hair shaft changes using scanning electron microscopy (SEM) in female volunteers who frequently use hair treatment procedures such as bleaching, dyeing, or straightening. METHODS: A cross-sectional, controlled study in a sample of 25 female volunteers (19 study group and 6 controls) in the age group of 18-45 years...
April 2016: International Journal of Trichology
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