Age-Related Changes in Male Skin: Quantitative Evaluation of One Hundred and Fifty Male Subjects.
ABSTRACT Background/Purpose: Modern men have changed their beauty and grooming habits, which has resulted in an increasing demand for cosmetics for men. However, very little information is available about the dermatological needs of male skin. Therefore, the aim of this present clinical study was to conduct the first systematic assessment of the skin physiology of men with special attention to lifetime changes. Methods: A total of 150 healthy male subjects (aged 20-70 years) were selected following strict criteria, including age, sun behavior and smoking habits. Transepidermal water loss (TEWL), hydration level, sebum production and pH values were measured with worldwide-acknowledged biophysical measuring methods at the forehead, cheek, neck, volar forearm and dorsum of hand. Results: TEWL and sebum production vary by localization, but generally not with increasing age, whereas stratum corneum (SC) hydration decreases significantly at the face and neck. The greatest decrease was assessed at the forehead. Skin surface pH significantly increases with aging in the face. Conclusion: The present study assigns for the first time systematic reference values for standardized biophysical measuring methods and localizations reflecting the skin physiology of men in relation to age. The results show that the physiology of male skin partly changes with aging. While SC hydration and skin surface pH are affected by the subject's age, TEWL and sebum production show only minor variations.
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ABSTRACT: In crime scene investigations, DNA left by touch on an object can be found frequently and the significant improvements in short tandem repeat (STR) amplification in recent years built up a high expectation to identify the individual(s) who touched the object by their DNA profile. Nevertheless, the percentage of reliably analysable samples varies considerably between different crime scenes even if the nature of the stains appears to be very similar. Here, it has been proposed that the amount and quality of DNA left at a crime scene may be influenced by external factors (like nature of the surface) and/or individual factors (like skin conditions). In this study, the influence of the age of an individual who left his DNA on an object is investigated. Handprints from 213 individuals (1 to 89 years old) left on a plastic syringe were analysed for DNA amount and STR alleles using Quantifiler® and PowerPlex® ESX 17. A full profile of the individual could be found in 75 % of all children up to 10 years, 9 % of adolescents (11 to 20 years), 25 % of adults (21 to 60 years) and 8 % of elderly people (older than 60 years). No person older than 80 years displayed a full profile. Drop-in and drop-out artefacts occurred frequently throughout the age groups. A dependency of quantity and quality of the DNA left on a touched object on the age of the individual could be clearly demonstrated at least for children and elderly people. An epithelial abrasion unexpectedly good to interpret may be derived from a child, whereas the suspected skin contact of an elderly person with an object may be impossible to prove.Deutsche Zeitschrift für die Gesamte Gerichtliche Medizin 09/2013; · 2.69 Impact Factor
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ABSTRACT: A series of cases of symmetric acral keratoderma have been recently described in China.However, no studies about its demographic information and epidermal barrier function have been documented.Objective To describe the clinical manifestation,demographic information,and clinicopathologic features of 71 cases with symmetric acral keratoderma. Seventy-one cases with symmetric acral keratoderma were retrospectively reviewed.Their demographic information, clinical manifestations,histopathology and epidermal barrier function were analyzed. Among these patients, there were 64 males and 7 females, ranging in age from 4 to 53 years with an average age at onset of 27.01 ± 8.86 years. The clinical manifestation was characterized by brown hyperkeratotie patches over the dorsum of the hands,palms and feet,dorsal digits and wrists,elbows,knees,and ankles.The lesions became dramatically whitish with mild swelling immediately after soaking in water and resolved spontaneously in winter.In patients, a moderate increase of transepidermal water loss(TEWL) from 16.16±6.15 to 9.9±4.21 g/m(2) h(P =0.0054) and a moderate decrease of skin hydration from 65.9±5.06 to 42.58±10.73(P < 0.01) in comparison with the control group were observed. Histopathological examination revealed epidermal hyperkeratosis, acanthosis and papillomatous hyperplasia as well as dermal infiltration with a few lymphocytes. Symmetric acral keratoderma is characterized by symmetry,acra,keratinization and mark seasonal changes.The epidermal barrier function of the skin was negatively affected. This article is protected by copyright. All rights reserved.British Journal of Dermatology 12/2013; · 3.76 Impact Factor