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1.  Genetics and skin aging 
Dermato-endocrinology  2012;4(3):280-284.
Skin aging is a complex process and underlies multiple influences with the probable involvement of heritable and various environmental factors. Several theories have been conducted regarding the pathomechanisms of aged skin, however fundamental mechanisms still remain poorly understood. This article addresses the influence of genetics on skin aging and in particular deals with the differences observed in ethnic populations and between both genders. Recent studies indicate that male and female aged skin differs as far as the type, the consistency and the sensitivity to external factors is concerned. The same has been also documented between elderly people of different origin. Consequently, the aging process taking place in both genders and in diverse ethnic groups should be examined separately and products specialized to each population should be developed in order to satisfy the special needs.
doi:10.4161/derm.22372
PMCID: PMC3583889  PMID: 23467395
skin; aging; genetics; gender; biomarkers; ethnic differences
2.  Cutaneous infection by Mycobacterium haemophilum and kansasii in an IgA-deficient man 
BMC Dermatology  2011;11:3.
Background
The prevalence of infections by nontuberculous mycobacteria (NTM) has steadily increased over the past decades, especially in immunocompromised patients.
Case presentation
We present a patient with IgA-deficiency and mixed cutaneous infection by two slowly growing mycobacteria, Mycobacterium (M.) haemophilum and M. kansasii.
Conclusions
Cutaneous M. haemophilum infections most often result from HIV or transplantation-associated immunosuppression. Rarely, M. haemophilum may also infect healthy patients or iatrogenically immunosuppressed patients without transplantation. M. kansasii is one of the most frequent NTM and large awareness exists about its involvement in human diseases. Mycobacterial diagnosis of cutaneous infections should be considered in long-lasting skin lesions.
doi:10.1186/1471-5945-11-3
PMCID: PMC3038168  PMID: 21269422

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