Ensemble des articles de QIMA Life Sciences traitant de la biologie de la peau ainsi que des modèles cellulaires et tests in vitro d’intérêts pour l’évaluation de l’efficacité des produits et ingrédients cosmétiques

Newtone Technologies - clinical imaging - skin and hair appearance - ColorFace

Comparative analysis of original face and skin-warped average face images for the scoring of skin attributes

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In the cosmetic field, claim substantiations face several challenges.One that could seem trivial is illustrating the performance of a product. With the growing awareness of subjects’ image rights and the implementation of more regulations to protect personal data, presenting the effects of a product using the very image of a subject becomes increasingly complicated.

Neryl acetate, the major component of Corsican Helichrysum italicum essential oil, mediates its biological activities on skin barrier

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Helichrysum italicum (Roth) G. Don subsp. italicum (H. italicum italicum) from the Asteraceae family grows on dry, rocky or sandy ground around the Mediterranean Basin and is commonly known as the everlasting plant.

Evaluation of a new connected portable camera for the analysis of skin microrelief and the assessment of the effect of skin moisturisers

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The skin surface roughness is an indicator of interest for dermatology and cosmetology. Increased in xerotic skin or irritation, it is one of the most common frequent dermatological disorders.

Analysis of correlation and construction of a predictive model of skin transparency using parameters from digital images of the face

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Skin transparency is a cosmetic asset highly considered by Asian women. Resulting from complex light interactions within the skin, but still not fully understood, there is no simplemethod to measure it objectively.

Metrology and sensors as dermo-cosmetic technology opportunities for a change of paradigm

According to the International Bureau of Weights and Measurements, metrology, the study of measurement, is becoming an essential aspect of all industries today in creating value.

Canitie et pigmentation des cheveux

La canitie (grisonnement des cheveux) a un large impact social et cosmétique. QIMA Life Sciences présente ici sa physiopathologie, ses causes sous-jacentes et ses traitements.

Profiling TLR agonist activity in keratinocytes and link to bacteria-induced innate immunity activation

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In this study, our goal was first to functionally profile and characterize the response of normal human keratinocytes (NHEK) to microbial patterns (TLR agonists) and IL-1α in parallel. To do so, the effects of multiple TLR agonists and IL-1α were evaluated on the gene expression profile, on signal transduction (NF-ƘB translocation) and also on IL-8 and IL-6 release. Secondly, we also tried to link these responses to those of pathogens of interest in skin microbiota (namely, C. acnes, S. aureus and P. aeruginosa), by evaluating the effect on IL-8 release by NHEK infected with living bacteria from these 3 strains...

Facial skin mapping: from single point bio‐instrumental evaluation to continuous visualization of skin hydration, barrier function, skin surface pH, and sebum in different ethnic skin types

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Dry skin is one of the most important concerns of consumers worldwide. Despite huge efforts over several decades, the personal care industry still does not offer a perfect solution to satisfy the unmet needs of consumers for moisturising treatments in different ethnic groups.

Innate immunity activation of sebocyte cells by living bacteria. Evidence of a potential immunosuppressive effect of DHT.

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Acne is a skin pathology targeting the pilosebaceous unit…sebum hypersecretion and bacterial infection. We studied the effects of living bacteria on the induction of an innate immune response in a sebocyte cell line.

Androgens activate lipogenesis through an AKT-independent mTOR pathway stimulation and a limitation of autophagy in an androgen-sensitive sebocyte cell line.

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Androgens are key regulators of sebaceous function... A link between mTOR and androgen signaling has previously been reported...as well as a link between these processes and lipid synthesis...Here we aimed at confirming that DHT-induced lipid synthesis/accumulation is at least in part dependent on mTOR activation in the SEBO662AR cell line and that the autophagic process is consequently modified by the androgenic treatment.
in vitro and ex vivo assays: skin protection and immune defense system

Pollution and epigenetics: Histone H3 modifications in keratinocytes after exposure to urban dust and Benzo(a)pyrene

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In this work, human epidermal keratinocytes were used to study the effects of urban dust and benzo(a)pyrene on the epigenetic pattern of the histone H3 protein. The assay was then used to screen a series of plant extracts in order to find cosmetic actives to protect the skin against air pollution.
Dog Skin - Epidermal Cornification Proteins

Pseudomonas aeruginosa flagellum is critical for invasion, cutaneous persistence and induction of inflammatory response of skin epidermis

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Pseudomonas aeruginosa, an opportunistic pathogen involved in skin and lung diseases, possesses numerous virulence factors, including type 2 and 3 secretion systems (T2SS and T3SS) and its flagellum, whose functions remain poorly known during cutaneous infection.

New Biological Activities of Lythrum salicaria L.

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The perennial and widespread herb Lythrum salicaria L., also called purple loosestrife, is a plant that is traditionally used in European medicine.

Acné vulgaris : Physiopathologie et mécanismes cellulaires

L’acné vulgaris est une pathologie inflammatoire chronique cutanée localisée au niveau du follicule pilo-sébacé. Elle apparaît suite à une surproduction de sébum liée à des dysfonctionnements d’origine hormonale (androgène), environnementale (pollution…) et à la colonisation du follicule pilo-sébacé par certaines bactéries (P. acnes). (Dans ce contexte), QIMA Life Sciences a développé un panel de tests originaux destinés à la découverte et l’évaluation de composés pour le traitement de l’acné.
glande sébacée

La glande sébacée : Physiologie et fonctions

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La glande sébacée est un organe localisé au niveau du derme. Elle est responsable de la synthèse et de la sécrétion du sébum qui entre dans la composition du film hydrolipidique. Le rôle du sébum est de protéger la peau des agressions extérieures et de la déshydratation. Le sébum permet également d’entretenir la souplesse de la peau et des cheveux.