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Etude descriptive du vieillissement cutané au sein d'une cohorte de 209 sujets et relations avec le système nerveux autonome

Abstract : Background : The autonomic nervous system (ANS) is the most powerful marker of the overall body aging, especially for what concerns the vascular aging of the heart and the brain. Although the skin is richly innervated by ANS nerves and the ANS controls many skin functions, the relation between the ANS and skin aging has not been studied. Methods : We evalusated skin aging of 209 elderly subjects (105 women and 104 men, mean age 77.5 years) belonging to the PROOF (PROgnostic indicator OF cardiovascular and cerebrovascular events) cohort of Saint-Etienne which explores the functionality of the ANS. Skin aging was measured by the clinical score SCINEXA (SCore for INtrinsic and EXtrinsic skin Aging), by VISIA, videodermoscopy and cutometry. The ANS status was measuredby the heart rate variability on a 24 hours recording of the electrocardiogram. Results : A relation between ANS and SCINEXA could not be demonstrated. However, a relation between the activity of the ANS and some items of SCINEXA and certain parameters of VISIA, videodermoscopy and cutometry was found. In particular, the analysis of VISIA parameters showed a relation between elevated porphyrins and a decreased sympathetic activity of the ANS. Discussion and conclusion : Although we did not find a relationship between overall skin aging and ANS activity, ANS might play a role in intrinsic skin aging, albeit marginally if compared to external factors such a sun exposure. Moreover, the intrinsic part of the skin aging and the ANS, our study encourages further research on the influence of the ANS on the various components of skin aging.
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Élisa Cinotti. Etude descriptive du vieillissement cutané au sein d'une cohorte de 209 sujets et relations avec le système nerveux autonome. Médecine humaine et pathologie. Université de Lyon, 2016. Français. ⟨NNT : 2016LYSES022⟩. ⟨tel-01774158⟩

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