Dermatitis de contacto alérgica por fragancias. Parte I

A review of the key ingredients in industrial formulations of baby wet wipes

The skin of newborns is classified as sensitive, with a higher risk of skin barrier disruption and irritation of a diapered area. Despite dermatologist recommendations to use only water and a cloth for cleaning, most of the population still relies on the comforts of modern parenting, which includes intensive daily usage of baby wet wipes. Novel baby formulations are designed following the concept of infant skin health, containing a gentle cleanser, suitable emollient, and buffer system enabling a slightly acidic pH value and they are free of ethyl alcohol. Thus, it is important to understand the chemical background of such a complex liquid formulation, with emphasis on its safety. In line with this, the present paper discusses the scientific background of various chemical compounds found in baby wipe formulations to improve the understanding of wet wipe designs and direct them toward more skin-friendly solutions.

Analysis of preservatives and fragrances in topical medical devices: The need for more stringent regulation

INTRODUCTION

Medical devices (MDs) have a long history of use, and come with regulatory frameworks to ensure user safety. Although topically applied MDs in the form of gels and creams might be used on damaged skin, their composition is often similar to that of cosmetic products applicable to intact skin, especially in terms of preservatives and fragrances. However, unlike cosmetics, these products are not subject to compound-specific restrictions when used in MDs.

OBJECTIVE

This study aimed to identify and quantify preservatives and fragrances in topically applied MDs and assess their safety towards the Cosmetic Regulation (EC) 1223/2009.

METHOD

Sixty-nine MDs available on the EU market were subjected to previously validated liquid chromatography tandem mass spectrometry (LC-MS/MS) and gas chromatography-mass spectrometry (GC-MS) methods to identify and quantify occurring preservatives and fragrances.

RESULTS

Findings revealed that 32% of the examined MDs did not provide comprehensive ingredient lists, leaving users uninformed about potential risks associated with product use. Furthermore, 30% of these MDs would not meet safety standards for cosmetic products and, most significantly, 13% of the analysed samples contained ingredients that are prohibited in leave-on cosmetics.

CONCLUSION

Results highlight the pressing demand for more stringent requirements regarding the labelling and composition of MDs to enhance patient safety. Improved regulation and transparency can mitigate potential risks associated with the use of topically applied MDs.

Analysis of Hypersensitivity in Fragrance Series by Patch Testing

Introduction:

Allergic contact dermatitis (ACD) is an inflammatory disorder, which occurs as a result of repeated contact with an allergen. Fragrances are the products obtained naturally or produced synthetically. The purpose of this study is to detect the fragrance allergens producing ACD.

Materials and Methods:

This is an open-label prospective observational study. Patients of age above 18 years with history of using cosmetic products with dermatitis lesions over face, neck, axilla and hands were included. Patch testing was done with fragrance series by using the standard technique. The results were interpreted on day 2 and day 4 as recommended by International Contact Dermatitis Research Group criteria.

Results:

Totally 27 patients were included in this study. Of them, 12 were males and 15 were females; the mean age was 43 years. The mean duration of symptoms was 12.5 months. The most common site of involvement was hands. Housewives and office workers were the most commonly affected occupational groups. The most commonly used category of cosmetic product was talcum powders by 13 (48.1%) patients. In this study, 85.18% patients showed at least one fragrance antigen positivity. Fragrance mix II is the most frequent allergen in this study.

Discussion:

We conclude that the fragrance mix II is an important marker to find out fragrance allergy. Hand dermatitis is the most common presentation in patients with fragrance allergy. Perfumed talcum powders, soaps and perfumes are the leading sources of sensitization to fragrance allergens.

Positive results of patch tests with fragrance markers: analysis of a 15-year period at a Brazilian dermatology center

Fragrances may cause allergic contact dermatitis. Data on patients who were patch tested, between 2000 and 2015, with fragrance allergens included in the Brazilian baseline series (balsam of Peru, colophony and fragrance mix I), were collected and analyzed. Of these patients, 258 (13.8%) were positive for fragrance markers, 9.8% being positive for fragrance mix I. Among these 258 there was a predominance of women in their 40s, with hand eczema. The frequency of sensitization to fragrances, as well as the epidemiological profile, was supported by the literature. Fragrance mix I was the main marker. It is important to expand the fragrance markers used in the Brazilian baseline series of patch tests.

Extractions of oil from Descurainia sophia seed using supercritical CO2, chemical compositions by GC-MS and evaluation of the anti-tussive, expectorant and anti-asthmatic activities

Descurainia sophia is widely distributed in China and is one of the most troublesome annual weeds. It has diverse medicinal usage. D. sophia has abundant oil, making it an important oil plant in China. The main goal of this study was to obtain the maximum yield of the oil by an optimal selection of supercritical fluid extraction parameters. According to the central composite design and response surface methodology for supercritical fluid extraction method, a quadratic polynomial model was used to predict the yield of D. sophia seed oil. A series of runs was performed to assess the optimal extraction conditions. The results indicated that the extraction pressure had the greatest impact on oil yield within the range of the operating conditions studied. A total of approximately 67 compounds were separated in D. sophia seed oil by GC-MS, of which 51 compounds represented 98.21% of the total oils, for the first time. This study was also aimed at evaluating the anti-asthmatic, anti-tussive and expectorant activities in vivo of D. sophia seed oil which supplied for further research on bioactive constituents and pharmacological mechanisms.