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  1. Article: A Dunaliella salina Extract Counteracts Skin Aging under Intense Solar Irradiation Thanks to Its Antiglycation and Anti-Inflammatory Properties

    Havas, Fabien / Krispin, Shlomo / Cohen, Moshe / Loing, Estelle / Farge, Morgane / Suere, Thierry / Attia-Vigneau, Joan

    Marine drugs. 2022 Jan. 27, v. 20, no. 2

    2022  

    Abstract: Glycation, and the resulting buildup of advanced glycation end products (AGEs), is recognized as a key driver of cumulative skin damage and skin aging. Dunaliella salina is a halophile microalga adapted to intense solar radiation through the production ... ...

    Abstract Glycation, and the resulting buildup of advanced glycation end products (AGEs), is recognized as a key driver of cumulative skin damage and skin aging. Dunaliella salina is a halophile microalga adapted to intense solar radiation through the production of carotenoids. We present a natural supercritical CO₂ extract of Dunaliella salina rich in the colorless carotenoids phytoene and phytofluene. The extract exhibited antiglycation and anti-inflammatory activities in ex vivo testing, showing strongly reduced formation of N--carboxy-methyl-lysine with exposure to methylglyoxal, reduced AGE receptor levels, and significantly reduced interleukins 6 and 8. In a placebo-controlled clinical study under intense solar exposure, the extract significantly reduced the skin’s glycation scores and its sensitivity to histamine; key skin aging parameters were also significantly improved vs. placebo, including wrinkle counts and spots. These results demonstrate the value of this Dunaliella salina extract, rich in colorless carotenoids, as an antiglycative, anti-inflammatory, and antiaging active ingredient, including in high-irradiation contexts.
    Keywords Dunaliella salina ; active ingredients ; carbon dioxide ; carotenoids ; glycation ; halophiles ; histamine ; interleukins ; microalgae ; placebos ; receptors ; solar radiation
    Language English
    Dates of publication 2022-0127
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2175190-0
    ISSN 1660-3397
    ISSN 1660-3397
    DOI 10.3390/md20020104
    Database NAL-Catalogue (AGRICOLA)

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  2. Article ; Online: Polylysine dendrigraft is able to differentially impact Cutibacterium acnes strains preventing acneic skin.

    Attia-Vigneau, Joan / Barreau, Magalie / Le Toquin, Esther / Feuilloley, Marc G J / Loing, Estelle / Lesouhaitier, Olivier

    Experimental dermatology

    2022  Volume 31, Issue 7, Page(s) 1056–1064

    Abstract: With a view to reducing the impact of Cutibacterium acnes (C. acnes) on acne vulgaris, it now appears interesting to modify the balance between acneic and non-acneic strains of C. acnes using moderate approach. In the present study, we identified that a ... ...

    Abstract With a view to reducing the impact of Cutibacterium acnes (C. acnes) on acne vulgaris, it now appears interesting to modify the balance between acneic and non-acneic strains of C. acnes using moderate approach. In the present study, we identified that a G2 dendrigraft of lysine dendrimer (G2 dendrimer) was able to modify membrane fluidity and biofilm formation of a C. acnes acneic strain (RT5), whereas it appeared no or less active on a C. acnes non-acneic strain (RT6). Moreover, skin ex vivo data indicated that the G2 is able to decrease inflammation (IL1α and TLR-2) and improve skin desquamation after of C. acnes acneic strains colonization. Then, in vivo data confirmed, after C. acnes quantification by metagenomic analysis that the G2 cream after 28 days of treatment was able to increase the diversity of C. acnes strains versus placebo cream. The data also showed a modification of the balance expression between C. acnes phylotype IA1 and phylotype II abundances. Taken together, the results confirm the interest of using soft compounds in cosmetic product for modifying phylotype abundances and diversity of C. acnes strains could be a new strategy for prevent acne vulgaris outbreak.
    MeSH term(s) Acne Vulgaris/microbiology ; Acne Vulgaris/prevention & control ; Dendrimers ; Humans ; Polylysine ; Propionibacterium acnes ; Skin/microbiology
    Chemical Substances Dendrimers ; Polylysine (25104-18-1)
    Language English
    Publishing date 2022-03-09
    Publishing country Denmark
    Document type Journal Article
    ZDB-ID 1130936-2
    ISSN 1600-0625 ; 0906-6705
    ISSN (online) 1600-0625
    ISSN 0906-6705
    DOI 10.1111/exd.14554
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: A

    Havas, Fabien / Krispin, Shlomo / Cohen, Moshe / Loing, Estelle / Farge, Morgane / Suere, Thierry / Attia-Vigneau, Joan

    Marine drugs

    2022  Volume 20, Issue 2

    Abstract: Glycation, and the resulting buildup of advanced glycation end products (AGEs), is recognized as a key driver of cumulative skin damage and skin aging. ...

    Abstract Glycation, and the resulting buildup of advanced glycation end products (AGEs), is recognized as a key driver of cumulative skin damage and skin aging.
    MeSH term(s) Adult ; Anti-Inflammatory Agents/pharmacology ; Biological Products/pharmacology ; Double-Blind Method ; Female ; Glycation End Products, Advanced/drug effects ; Histamine/metabolism ; Humans ; Microalgae/chemistry ; Middle Aged ; Skin Aging/drug effects
    Chemical Substances Anti-Inflammatory Agents ; Biological Products ; Glycation End Products, Advanced ; Histamine (820484N8I3)
    Language English
    Publishing date 2022-01-27
    Publishing country Switzerland
    Document type Journal Article ; Randomized Controlled Trial
    ZDB-ID 2175190-0
    ISSN 1660-3397 ; 1660-3397
    ISSN (online) 1660-3397
    ISSN 1660-3397
    DOI 10.3390/md20020104
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: A Tissue-Engineered Human Psoriatic Skin Model to Investigate the Implication of cAMP in Psoriasis: Differential Impacts of Cholera Toxin and Isoproterenol on cAMP Levels of the Epidermis.

    Simard, Mélissa / Morin, Sophie / Rioux, Geneviève / Séguin, Rachelle / Loing, Estelle / Pouliot, Roxane

    International journal of molecular sciences

    2020  Volume 21, Issue 15

    Abstract: Pathological and healthy skin models were reconstructed using similar culture conditions according to well-known tissue engineering protocols. For both models, cyclic nucleotide enhancers were used as additives to promote keratinocytes' proliferation. ... ...

    Abstract Pathological and healthy skin models were reconstructed using similar culture conditions according to well-known tissue engineering protocols. For both models, cyclic nucleotide enhancers were used as additives to promote keratinocytes' proliferation. Cholera toxin (CT) and isoproterenol (ISO), a beta-adrenergic agonist, are the most common cAMP stimulators recommended for cell culture. The aim of this study was to evaluate the impact of either CT or ISO on the pathological characteristics of the dermatosis while producing a psoriatic skin model. Healthy and psoriatic skin substitutes were produced according to the self-assembly method of tissue engineering, using culture media supplemented with either CT (10
    MeSH term(s) Adenylyl Cyclases/metabolism ; Cholera Toxin/toxicity ; Cyclic AMP/metabolism ; Epidermis/metabolism ; Epidermis/pathology ; Female ; Humans ; Isoproterenol/administration & dosage ; Isoproterenol/pharmacology ; Male ; Middle Aged ; Models, Biological ; Psoriasis/metabolism ; Psoriasis/pathology ; Second Messenger Systems/drug effects ; Tissue Engineering
    Chemical Substances Cholera Toxin (9012-63-9) ; Cyclic AMP (E0399OZS9N) ; Adenylyl Cyclases (EC 4.6.1.1) ; adenylate cyclase 9 (EC 4.6.1.1) ; Isoproterenol (L628TT009W)
    Language English
    Publishing date 2020-07-23
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms21155215
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: A Rose Extract Protects the Skin against Stress Mediators: A Potential Role of Olfactory Receptors.

    Duroux, Romain / Mandeau, Anne / Guiraudie-Capraz, Gaelle / Quesnel, Yannick / Loing, Estelle

    Molecules (Basel, Switzerland)

    2020  Volume 25, Issue 20

    Abstract: Olfactory receptors (ORs) are expressed and active in various human tissues, including the skin. Although the sense of smell plays an important physiological role in the regulation of mood and stress, a link between olfactive compounds, ORs, and skin ... ...

    Abstract Olfactory receptors (ORs) are expressed and active in various human tissues, including the skin. Although the sense of smell plays an important physiological role in the regulation of mood and stress, a link between olfactive compounds, ORs, and skin stress has yet to be established. This study aims to investigate the role of newly identified skin ORs and agonists in the modulation of skin stress. Screening for odorant molecules was done with cAMP functional assay to identify OR agonists. RT-qPCR and immunofluorescence microscopy were conducted to identify and quantify ORs in epidermal keratinocytes (NHEKs) and human skin explants, as well as to evaluate specific markers (G6PDH, loricrin, and γH2AX) of stress-induced skin alterations. A randomized double-blinded, split-face clinical study was performed on a panel of stressed women to measure the benefits of OR agonist treatment for skin. Three new ORs (OR10A6, OR2AG2, and OR11H4) were identified in skin. A specific Rose extract and its major constituent (phenylethyl alcohol) were found to activate these ORs. The extract composition was revealed by both GC/FID and GC/MS analyses simultaneously and showed the presence of 34 volatiles molecules. Moreover, epinephrine induces a skin stress response characterized by increased expression of G6PD, loricrin, and γH2AX biomarkers, and a decrease of OR expression. These effects were prevented in the presence of rose extract and its benefits were confirmed clinically by a decrease in the appearance of under-eye dark circles. Altogether, our findings suggest that ORs may represent a new, promising way to treat stress-associated skin disorders.
    MeSH term(s) Gene Expression Regulation/drug effects ; Humans ; Keratinocytes/drug effects ; Plant Extracts/chemistry ; Plant Extracts/pharmacology ; Protective Agents/chemistry ; Protective Agents/pharmacology ; Receptors, Odorant/genetics ; Rosa/chemistry ; Signal Transduction/drug effects ; Skin/drug effects ; Skin/metabolism ; Volatile Organic Compounds/chemistry ; Volatile Organic Compounds/pharmacology
    Chemical Substances Plant Extracts ; Protective Agents ; Receptors, Odorant ; Volatile Organic Compounds
    Language English
    Publishing date 2020-10-16
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules25204743
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Unique natural exopolysaccharides for biomimetic protective effect against urban pollution.

    Borel, Magali / Lamarque, Elisabeth / Loing, Estelle

    Journal of cosmetic science

    2017  Volume 68, Issue 1, Page(s) 126–132

    Abstract: Through natural selection, living organisms have evolved well-adapted survival strategies over time. The shallow salt waters of Moorea lagoon are the site of accumulation of microbial mats called "Kopara," in the native Polynesian language. This unique ... ...

    Abstract Through natural selection, living organisms have evolved well-adapted survival strategies over time. The shallow salt waters of Moorea lagoon are the site of accumulation of microbial mats called "Kopara," in the native Polynesian language. This unique ecosystem is rich in film-forming exopolysaccharides (EPSs) secreted by microorganisms within the biofilm, as a mean to protect themselves from environmental stress (strong ultraviolet [UV], pH, salinity … ). Using blue biotechnology, a manufacturing process was developed to obtain an EPS with skin benefits. The active ingredient (EPS-229) protects against urban pollution, including free radicals, heavy metals, hydrocarbons, and PM
    Methods: The anti-lipid peroxidation action of EPS-229 was studied in an
    Results: In vitro
    Conclusion: Inspired by the French Polynesia Kopara unique ecosystem, a bioactive exopolysaccharide (EPS-229) has been developed that offers protection from environmental aggression. As a biomimetic shield at the surface of the skin, EPS-229 provides an immediate multiprotective action that efficiently fights the harmful effects of urban pollution and smog.
    MeSH term(s) Alteromonas/chemistry ; Alteromonas/metabolism ; Biomimetics ; Dermatologic Agents/chemistry ; Dermatologic Agents/pharmacology ; Environmental Pollutants/adverse effects ; Fermentation ; Free Radicals/adverse effects ; Humans ; Keratinocytes/drug effects ; Keratinocytes/metabolism ; Lipid Peroxidation/drug effects ; Metals, Heavy/toxicity ; Polysaccharides/pharmacology ; Protective Agents/pharmacology ; Skin/drug effects ; Skin Care ; Urban Health
    Chemical Substances Dermatologic Agents ; Environmental Pollutants ; Free Radicals ; Metals, Heavy ; Polysaccharides ; Protective Agents
    Language English
    Publishing date 2017-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1435667-3
    ISSN 1525-7886 ; 0037-9832
    ISSN 1525-7886 ; 0037-9832
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: New targets in the battle against dandruff.

    Loing, Estelle / Lamarque, Elisabeth / Borel, Magali

    Journal of cosmetic science

    2017  Volume 68, Issue 1, Page(s) 107–113

    Abstract: Dandruff is a scalp disorder characterized by flaking skin and itch of an excessive oily scalp skin. It affects 55% of the global youth and adult population. Seborrheic dermatitis is a similar scalp skin disorder with aggravated itchy rashes and flaking. ...

    Abstract Dandruff is a scalp disorder characterized by flaking skin and itch of an excessive oily scalp skin. It affects 55% of the global youth and adult population. Seborrheic dermatitis is a similar scalp skin disorder with aggravated itchy rashes and flaking. Different factors are identified in the dandruff development: increased sebum production, uncontrolled fungal growth of
    MeSH term(s) Adult ; Aged ; Anti-Inflammatory Agents, Non-Steroidal/therapeutic use ; Antioxidants/pharmacology ; Antioxidants/therapeutic use ; Dandruff/drug therapy ; Epilobium/chemistry ; Female ; Fungi/drug effects ; Healthy Volunteers ; Humans ; Hydrolyzable Tannins/pharmacology ; Hydrolyzable Tannins/therapeutic use ; Lipids/biosynthesis ; Malassezia/drug effects ; Malassezia/metabolism ; Male ; Middle Aged ; Phytotherapy ; Plant Extracts/therapeutic use ; Primary Cell Culture ; Skin/cytology ; Skin/microbiology ; Young Adult
    Chemical Substances Anti-Inflammatory Agents, Non-Steroidal ; Antioxidants ; Hydrolyzable Tannins ; Lipids ; Plant Extracts ; ellagitannin ; oenothein B (104987-36-2)
    Language English
    Publishing date 2017-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1435667-3
    ISSN 1525-7886 ; 0037-9832
    ISSN 1525-7886 ; 0037-9832
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: A new strategy to modulate alopecia using a combination of two specific and unique ingredients.

    Loing, Estelle / Lachance, Roger / Ollier, Virginie / Hocquaux, Michel

    Journal of cosmetic science

    2013  Volume 64, Issue 1, Page(s) 45–58

    Abstract: Male pattern hair loss is a major cosmetic concern affecting both genders with a preference for men. Major causes of hair loss in genetically predisposed individuals include hormonal dysfunction, loss of extracellular matrix (ECM) proteins in the ... ...

    Abstract Male pattern hair loss is a major cosmetic concern affecting both genders with a preference for men. Major causes of hair loss in genetically predisposed individuals include hormonal dysfunction, loss of extracellular matrix (ECM) proteins in the follicular bed, and localized microinflammation. Few options are yet available to correct the problem. For this purpose, a cosmetic active ingredient was developed by combining a Trifolium pratense flower extract and a biomimetic peptide and tested clinically for the prevention of hair loss. Thirty volunteers with recessing hair were recruited for this randomized, placebo-controlled study. Clinical efficacy, following daily topical application of the mixture to the scalp, was checked using TrichoScan™ for the measurement of human hair. Within 4 months of application, anagen hair increased at an average by +13%, telogen hair density decreased by -29%, and the anagen/telogen (A/T) ratio increased by +46% over baseline in the treated group. Results strongly differed from those of the placebo group (anagen, -2%; telogen, +23%; A/T ratio, -33%). Investigation of the potential mechanisms involved in the positive effects of the test product on hair growth pointed at inhibition of 5-α-reductase activity, reduction of inflammatory reactions, and stimulation of ECM protein synthesis in the vicinity of the hair follicle.
    MeSH term(s) Adult ; Alopecia/drug therapy ; Female ; Fibroblasts/drug effects ; Genistein ; Hair/growth & development ; Hair Follicle/drug effects ; Humans ; Male ; Medicago/chemistry ; Middle Aged ; Oligopeptides/pharmacology ; Plant Extracts/chemistry ; Plant Extracts/pharmacology
    Chemical Substances Oligopeptides ; Plant Extracts ; Genistein (DH2M523P0H) ; biochanin A (U13J6U390T)
    Language English
    Publishing date 2013-01
    Publishing country United States
    Document type Journal Article ; Randomized Controlled Trial
    ZDB-ID 1435667-3
    ISSN 1525-7886 ; 0037-9832
    ISSN 1525-7886 ; 0037-9832
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Development of a new resistant liposome coated with polysaccharide film for cosmetic application.

    Belhaj, Nabila / Arnaud, Jean Pierre / Loing, Estelle / Bézivin, Carine

    Journal of cosmetic science

    2014  Volume 65, Issue 4, Page(s) 225–238

    Abstract: The aim of our study was to elaborate a resistant liposome that can be used in cosmetic formulations containing high amounts of surfactants and electrolytes. The stability of liposomes was increased via hydrophobized polysaccharide (Stearoyl Inulin) by ... ...

    Abstract The aim of our study was to elaborate a resistant liposome that can be used in cosmetic formulations containing high amounts of surfactants and electrolytes. The stability of liposomes was increased via hydrophobized polysaccharide (Stearoyl Inulin) by anchoring its stearic acid tail into liposome bilayer. Coated and noncoated liposomes were prepared under the same conditions and their morphology, size, and resistance to surfactants and electrolytes were evaluated. We established that coated lipbsomes were more resistant to surfactants and electrolytes. It seems that a coating of polysaccharides prevents liposome destabilization in the presence of high amounts of surfactants and electrolytes. Moreover, the ability of coated liposomes to improve the skin delivery of active molecules was evaluated. Coated liposomes increased the efficacy of magnesium chloride by improving its skin availability.
    MeSH term(s) Cosmetics ; Freeze Fracturing ; Hydrophobic and Hydrophilic Interactions ; Liposomes ; Polysaccharides/chemistry
    Chemical Substances Cosmetics ; Liposomes ; Polysaccharides
    Language English
    Publishing date 2014-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1435667-3
    ISSN 1525-7886 ; 0037-9832
    ISSN 1525-7886 ; 0037-9832
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Clinical efficacy of a serum integrating multiple cosmetic ingredients in the management of erythema of the face in aging skin.

    Dupont, Eric / Léveillé, Claude / Gomez, Juan / Loigeret, Manuel / Loing, Estelle / Bilodeau, Diane

    Journal of cosmetic dermatology

    2012  Volume 11, Issue 3, Page(s) 207–212

    Abstract: Background: Skin redness is a common cosmetic concern affecting predominantly fair-skin individuals and often leading to rosacea. On the basis of the current scientific knowledge of the physiological mechanisms underlying the problem, a complex and ... ...

    Abstract Background: Skin redness is a common cosmetic concern affecting predominantly fair-skin individuals and often leading to rosacea. On the basis of the current scientific knowledge of the physiological mechanisms underlying the problem, a complex and integral skin care serum (100RXED2025) was developed and tested clinically for efficacy.
    Method: Forty-five healthy men and women volunteers, age 30-65, were recruited. All subjects had fair skin (phototype I, II, or III) and presented some degree of skin redness with telangiectasia on the cheeks, the nose, or the nose sides, at baseline. In the course of this open label study, subjects applied the test product on their face, twice daily for 56 days. For each subject, skin redness was evaluated through colorimetric and visual analysis of photographs taken under cross-polarized light at T = 28 (week 4) and T = 56 (week 8), then compared to baseline measurements obtained at day 0.
    Results: Forty-four volunteers completed the study. On visual evaluation, skin redness had decreased in average by 32.2% at T = 28 (P < 0.001) and by 48.0% at T = 56 (P < 0.001). Importantly, 91% of the subjects showed improvement of skin redness at T = 28, reaching 100% at T = 56. Colorimetric analysis gave an average reduction in redness of 11.6% at T = 28 (P < 0.001) and 13.7% at T = 56 (P < 0.001).
    Conclusion: The anti-redness efficacy of the test product was demonstrated after 28 days with further increase following 56 days of application.
    MeSH term(s) Administration, Cutaneous ; Adult ; Aged ; Colorimetry ; Cosmetics/therapeutic use ; Erythema/drug therapy ; Facial Dermatoses/drug therapy ; Female ; Humans ; Male ; Middle Aged ; Photography ; Skin Aging ; Statistics, Nonparametric ; Telangiectasis/drug therapy
    Chemical Substances Cosmetics
    Language English
    Publishing date 2012-09
    Publishing country England
    Document type Clinical Trial ; Journal Article
    ZDB-ID 2280551-5
    ISSN 1473-2165 ; 1473-2130
    ISSN (online) 1473-2165
    ISSN 1473-2130
    DOI 10.1111/j.1473-2165.2012.00623.x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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