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  1. Article ; Online: Protective Properties of Botanical Extracts against 5G Radiation-induced Damage to Human Skin, as Demonstrated in Preliminary Data from a Keratinocyte Cell Culture Model.

    Havas, Fabien / Cohen, Moshe / Krispin, Shlomo / Attia-Vigneau, Joan

    Frontiers in bioscience (Landmark edition)

    2024  Volume 29, Issue 1, Page(s) 31

    Abstract: Background: Next-generation 5G communication technology involves increasing use of 3-100 GHz wireless bands in population centers. Though still non-ionizing, this implies higher radiation energy vs. existing bands. The range is also shorter, needing ... ...

    Abstract Background: Next-generation 5G communication technology involves increasing use of 3-100 GHz wireless bands in population centers. Though still non-ionizing, this implies higher radiation energy vs. existing bands. The range is also shorter, needing more numerous emitters, closer to the user-resulting in higher electromagnetic energy exposure. With no universal consensus regarding exposure risks, there is some concern among the public and the scientific community, following indications that 5G radiation can impact immune function, trigger inflammatory responses, and influence expression of genes affecting protein folding, oxidative stress, tissue/extracellular matrix (ECM) matrix turnover, and more. This work aims at identifying botanical extracts for protection of human skin from these impacts, based on a preliminary cell culture-based model.
    Methods: We irradiated human epidermal keratinocytes at 6 GHz, evaluating effects on Interleukin1-α (IL1-α), a key inflammatory cytokine; TIMP metallopeptidase inhibitor 1 (TIMP1), shown to inhibit collagenase; Angiopoietin-like protein 4 (ANGPLT4), which plays a role in wound healing and epidermal differentiation; and S100 calcium-binding protein A9 (S100A9), involved in immune recruitment during injury, by enzyme-linked immunosorbent assay (ELISA) and immunostaining. We next used this model to identify substances able to mitigate the effects of 5G irradiation, through the evaluation of the influence of treatment by one of several botanical extracts on the observed effects of 5G irradiation.
    Results: After a remarkably short 1-h exposure, clear effects on keratinocyte function were observed: increased inflammatory cytokine IL1-α; reduced collagenase inhibitor TIMP1; increased wound healing/differentiation facilitator ANGPLT4; and increased SA100A9, involved in immune recruitment during injury. On this basis, we then showed the protective effects of selected botanical extracts, capable of reducing the increase in IL1-α induced by 5G exposure, possibly in part due to anti-inflammatory and anti-oxidant properties of compounds present in these extracts.
    Conclusions: Our results show a clear influence of 5G irradiation on the keratinocytes, possibly indicating injury and damage responses. What's more, we showed how these preliminary data can be used to identify botanical extracts capable of offering some protection against these effects for users of 5G technology, e.g., when employed as active ingredients in protective cosmetic applications.
    MeSH term(s) Humans ; Preliminary Data ; Skin ; Keratinocytes/metabolism ; Cytokines/metabolism ; Cell Culture Techniques
    Chemical Substances Cytokines
    Language English
    Publishing date 2024-02-10
    Publishing country Singapore
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2704569-9
    ISSN 2768-6698 ; 2768-6698
    ISSN (online) 2768-6698
    ISSN 2768-6698
    DOI 10.31083/j.fbl2901031
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Lysine-Dendrimer, a New Non-Aggressive Solution to Rebalance the Microbiota of Acne-Prone Skin.

    Leignadier, Julie / Drago, Marie / Lesouhaitier, Olivier / Barreau, Magalie / Dashi, Albert / Worsley, Oliver / Attia-Vigneau, Joan

    Pharmaceutics

    2023  Volume 15, Issue 8

    Abstract: Acne is a chronic inflammatory skin disease that affects the quality of life of patients. Several treatments exist for acne, but their effectiveness tends to decrease over time due to increasing resistance to treatment and associated side effects. To ... ...

    Abstract Acne is a chronic inflammatory skin disease that affects the quality of life of patients. Several treatments exist for acne, but their effectiveness tends to decrease over time due to increasing resistance to treatment and associated side effects. To circumvent these issues, a new approach has emerged that involves combating the pathogen
    Language English
    Publishing date 2023-08-03
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527217-2
    ISSN 1999-4923
    ISSN 1999-4923
    DOI 10.3390/pharmaceutics15082083
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. 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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  4. 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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  5. 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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  6. Article ; Online: Regeneration of human dermis by a multi-headed peptide.

    Attia-Vigneau, Joan / Terryn, Christine / Lorimier, Sandrine / Sandre, Jerome / Antonicelli, Frank / Hornebeck, William

    The Journal of investigative dermatology

    2013  Volume 134, Issue 1, Page(s) 58–67

    Abstract: Skin aging is characterized by deterioration of the dermal collagen fiber network due to both decreased collagen expression and increased collagenolytic activity. We designed and evaluated in vitro and ex vivo the efficacy of a trifunctional peptide (TFP) ...

    Abstract Skin aging is characterized by deterioration of the dermal collagen fiber network due to both decreased collagen expression and increased collagenolytic activity. We designed and evaluated in vitro and ex vivo the efficacy of a trifunctional peptide (TFP) to restore collagen and elastin fibers. TFP was constituted of an elastokine motif (VGVAPG)3, able to increase matrix constituent expression through the stimulation of the elastin-binding protein receptor, a GIL tripeptide occupying matrix metalloproteinase-1 subsites, and a RVRL linker domain acting as a competitive substrate for urokinase. The effects of TFP on type I, type III collagens, and elastin expression in dermal fibroblasts were determined by quantitative real-time reverse-transcriptase-PCR and western blotting. TFP's inhibitory capacity against MMP-1, plasmin, and urokinase was assessed using synthetic substrates, immunohistochemistry, and skin tissue sections as natural substrates. A skin explant model was used to recapitulate aging-induced dermal changes along culture extent. Collagen and elastin fiber structure was analyzed by two-photon fluorescence, second harmonic generation, and confocal microscopies. Compared with the different sections constituting the full peptide, we found that TFP activated the production of matrix constituents while inhibiting MMP-1 in vitro and ex vivo. It also induced a proper fiber network organization, reflecting the potency of TFP in skin remodeling and regeneration.
    MeSH term(s) Biopsy ; Cells, Cultured ; Collagen/genetics ; Collagen/metabolism ; Dermis/cytology ; Dermis/drug effects ; Dermis/physiology ; Drug Design ; Elastic Tissue/metabolism ; Elastin/genetics ; Elastin/metabolism ; Fibroblasts/cytology ; Fibroblasts/drug effects ; Fibroblasts/physiology ; Humans ; Matrix Metalloproteinase 1/genetics ; Matrix Metalloproteinase 1/metabolism ; Matrix Metalloproteinase 3/genetics ; Matrix Metalloproteinase 3/metabolism ; Peptides/pharmacology ; Regeneration/drug effects ; Regeneration/genetics ; Regeneration/physiology ; Skin Aging/drug effects ; Skin Aging/genetics ; Skin Aging/physiology
    Chemical Substances Peptides ; Collagen (9007-34-5) ; Elastin (9007-58-3) ; MMP3 protein, human (EC 3.4.24.17) ; Matrix Metalloproteinase 3 (EC 3.4.24.17) ; MMP1 protein, human (EC 3.4.24.7) ; Matrix Metalloproteinase 1 (EC 3.4.24.7)
    Language English
    Publishing date 2013-06-28
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 80136-7
    ISSN 1523-1747 ; 0022-202X
    ISSN (online) 1523-1747
    ISSN 0022-202X
    DOI 10.1038/jid.2013.290
    Database MEDical Literature Analysis and Retrieval System OnLINE

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