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Cosmetic application of the stem-bark extract of Bertholletia excelsa H.B.K / Marcia J. A. Silva in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 46, N° 5 (10/2024)
[article]
Titre : Cosmetic application of the stem-bark extract of Bertholletia excelsa H.B.K Type de document : texte imprimé Auteurs : Marcia J. A. Silva, Auteur ; Leonard D. R. Acho, Auteur ; Simone B. Carneiro, Auteur ; Anderson C. Guimaraes, Auteur ; Emerson S. Lima, Auteur Année de publication : 2024 Article en page(s) : p. 643-656 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antiâge
Biomolécules actives
Cellules -- Cultures et milieux de culture
Cellules -- Prolifération
Cosmétiques
Dermo-cosmétologie
Extraits de plantes:Extraits (pharmacie)
Noyer du Brésil et constituants
Peau -- Anatomie
Peau -- Physiologie
Peau -- Soins et hygiène
Photovieillissement (dermatologie)Index. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : The Amazon has a rich biodiversity where many different plant species can be found. This diversity is an important source of bioactive substances, mainly due to the different structural components of their phytometabolites. Research for natural products is a strategy for the development of new agents in therapeutic applications, especially cosmetic applications, that have better pharmacological potential. Within this perspective, the objective of the study was to investigate the cosmetic application (anti-aging potential) of the stem-bark extract of Bertholletia excelsa H.B.K – (SBEBE), popularly known as the Brazil nut tree, here called SBEBE, a noble plant species of the Amazon that is rich in selenium.
- Methods : Enzymatic, glycation, proliferation, cell-healing, collagen quantification, toxicity and genotoxicity assays were used.
- Results : Among the enzymes involved in the extracellular matrix of the skin, SBEBE was able to inhibit only elastase (62.67 ± 3.75) when compared to the standard sivelestat (89.04 ± 0.53), and the extract was also able to inhibit both the oxidative and the non-oxidative pathway. When cell toxicity in fibroblasts (MRC-5) and keratinocytes (HACAT) was evaluated, SBEBE did not present toxicity in 24 h of incubation. After this period, the extract showed average cytotoxicity in 48 and 72 h, but not enough to reach the concentration of 50% of MRC-5 fibroblasts. In the trypan blue assay, the extract promoted fibroblast proliferation in 24, 48 and 72 h of incubation, which was evaluated through exponential cell growth, with emphasis mainly on the lowest concentration with results higher than the standard. When the cell healing capacity was evaluated, in 48 h of exposure to fibroblast, SBEBE was able to induce a cell carpet (cell film) in the cell monolayer scratch assay.
- Conclusions : SBEBE stimulated collagen production at all concentrations tested. In the alkaline comet assay, at the lowest concentration, the extract did not induce DNA damage when compared to the reference drug doxorubicin. This study proved that SBEBE extract can be considered an ally in the treatment of skin anti-ageing as a possible biotechnological, phytocosmetic product.Note de contenu : - MATERIALS AND METHODS :
- Acquisition of the extract
- Inhibition of collagenase
- Inhibition of elastase
- Inhibition of hyaluronidase
- Inhibition of tyrosinase
- Antiglycation activity : Oxidative pathway
- Antiglycation activity : Non-oxidativepathway
- Cell lines and culture
- Assessment of cell viability
- Quantification of collagen from fibroblast cell culture
- Evaluation of genotoxicity
- RESULTS AND DISCUSSION :
- Enzymatic assays
- Oxidative and non-oxidative antiglycation activity in vitro
- Effect of B. excelsa stem-bark extract on cell viability
- Effect of B. excelsa on cell proliferation – Trypan blue
- Evaluation of B. excelsa in the in vitro cell-motility/migration assay
- Quantification of collagen in fibroblast cell culture
- Genotoxicity assessment via the comet assay
- Table 1 : Result of the stem bark of SBEBE when evaluated for enzyme inhibition capacityDOI : https://doi.org/10.1111/ics.12945 En ligne : https://drive.google.com/file/d/12t1yjHY_LxKnhL26TbI_ucZqPkOM8ZRl/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41560
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 46, N° 5 (10/2024) . - p. 643-656[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Physiological and cell biological properties in vitro of collagen isolated from calf limed splits / G. I. Ly in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 2 (03-04/2004)
[article]
Titre : Physiological and cell biological properties in vitro of collagen isolated from calf limed splits Type de document : texte imprimé Auteurs : G. I. Ly, Auteur ; Shigeharu Fukunaga, Auteur ; K. Takenouchi, Auteur ; F. Nakamura, Auteur Année de publication : 2004 Article en page(s) : p. 66-71 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cellules -- Adhésivité
Cellules -- Prolifération
CollagénasesLes collagénases sont des enzymes capables de rompre les liaisons peptidiques du collagène. Elles facilitent la destruction des structures extracellulaires lors de la pathogenèse bactérienne. Ce sont des exotoxines.
La production de collagénases peut être induite lors d'une réponse immunitaire, par les cytokines qui stimulent les cellules telles que les fibroblastes et les ostéoplastes et occasionnent indirectement des lésions tissulaires.
Collagène -- Analyse
Collagène -- Solubilité
Cuirs et peaux de veaux
Fibrilles de collagèneLa fibrille de collagène est une structure constituée d'un assemblage de fibres de tropocollagène (assemblage de 3 protéines de collagène alpha (alpha 1 - alpha 1 - alpha 2) en une hélice droite.
KératinocytesLes kératinocytes sont des cellules constituant 90 % de la couche superficielle de la peau (épiderme) et des phanères (ongles, cheveux, poils, plumes, écailles). Ils synthétisent la kératine (kératinisation), une protéine fibreuse et insoluble dans l'eau, qui assure à la peau sa propriété d'imperméabilité et de protection extérieure.
L'épiderme est divisé en 4 couches basées sur la morphologie des kératinocytes (de l'intérieur vers l'extérieur) :
1. stratum germinativum (couche basale à la jonction avec le derme)
2. stratum spinosum
3. stratum granulosum
4. stratum lucidum
5. stratum corneum
Les kératinocytes passent progressivement de la couche basale vers les couches supérieures par différenciation cellulaire jusqu'au stratum corneum ou ils forment une couche de cellules mortes nommées squames, par apoptose. Cette couche constitue une barrière de protection et réduit la perte d'eau de l'organisme.
Les kératinocytes sont en perpétuel renouvellement. Ils mettent environ 1 mois pour aller de la couche basale au stratum corneum mais ce processus peut être accéléré en cas d'hyperprolifération de kératinocyte (psoriasis).
Systèmes auto-assemblésIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Experiments on self-assembly, susceptibility to collagenase degradation and activity for cell adhesion were carried out to determine the differences between collagen isolated from calf limed splits with acetic acid, alkali or pepsin treatment and commercial type I collagen produced from fresh bovine skins with acetic acid. Self-assembly was observed in all collagen solutions; however, fibril formation of acetic acid-treated collagen and pepsin-treated collagen was observed at neutral pH, as was that of commercial type I collagen whereas, alkali-treated collagen lost its ability of assembly at neutral pH but was able to form fibrils under acidic conditions. Scanning electron microscopy showed that the assembled fibrils from acetic acid-treated collagen had a major fibrous and minor membranous structure similar to that of commercial type I collagen but that reconstructed fibrils from pepsin-treated collagen were more rectilinear and evenly dispersed than were those of other collagens. Analysis by sodium dodecyl sulphatepolyacrylamide gel electrophoresis revealed that matrix metalloproteinase (MMP-1) cleaved collagen isolated from limed splits at a similar locus to that of commercial type I collagen. Keratinocytes cultured on collagen showed increased rates of attachment and proliferation. Moreover, pepsin-treated collagen had more significant effects on cell attachment and proliferation than commercial acetic acid-extracted type I collagen. Note de contenu : - EXPERIMENTAL METHODS : Preparation of limed splits and solubilized collagen - Collagen fibril formation - Scanning electron microscopy - Collagen digestion with collagenase - Isolation and culture of keratinocytes - Cell adhesive assay - Cell viability and proliferation assay
- RESULTS AND DISCUSSION : Collagen self-assembly - Susceptibility to MMP-1 collagenase digestion - Cell adhesion to collagenEn ligne : https://drive.google.com/file/d/1oyUIZqFKFf7bHK5bSlsnMk8zFL2wJeYM/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39644
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 2 (03-04/2004) . - p. 66-71[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire A secretion of the mollusc Cryptomphalus aspersa promotes proliferation, migration and survival of keratinocytes and dermal fibroblasts in vitro / M. C. Iglesias-de la Cruz in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 34, N° 2 (04/2012)
[article]
Titre : A secretion of the mollusc Cryptomphalus aspersa promotes proliferation, migration and survival of keratinocytes and dermal fibroblasts in vitro Type de document : texte imprimé Auteurs : M. C. Iglesias-de la Cruz, Auteur ; F. Sanz-Rodriguez, Auteur ; A. Zamarrón, Auteur ; E. Reyes, Auteur ; E. Carrasco, Auteur ; S. Gonzà lez, Auteur ; A. Juarranz, Auteur Année de publication : 2012 Article en page(s) : p. 183-189 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cellules -- Adhésivité
Cellules -- Prolifération
Cryptomphalus aspersa
Cytosquelette
Dermatologie
Fibroblastes
KératinocytesLes kératinocytes sont des cellules constituant 90 % de la couche superficielle de la peau (épiderme) et des phanères (ongles, cheveux, poils, plumes, écailles). Ils synthétisent la kératine (kératinisation), une protéine fibreuse et insoluble dans l'eau, qui assure à la peau sa propriété d'imperméabilité et de protection extérieure.
L'épiderme est divisé en 4 couches basées sur la morphologie des kératinocytes (de l'intérieur vers l'extérieur) :
1. stratum germinativum (couche basale à la jonction avec le derme)
2. stratum spinosum
3. stratum granulosum
4. stratum lucidum
5. stratum corneum
Les kératinocytes passent progressivement de la couche basale vers les couches supérieures par différenciation cellulaire jusqu'au stratum corneum ou ils forment une couche de cellules mortes nommées squames, par apoptose. Cette couche constitue une barrière de protection et réduit la perte d'eau de l'organisme.
Les kératinocytes sont en perpétuel renouvellement. Ils mettent environ 1 mois pour aller de la couche basale au stratum corneum mais ce processus peut être accéléré en cas d'hyperprolifération de kératinocyte (psoriasis).Index. décimale : 668.5 Parfums et cosmétiques Résumé : Regenerative properties of skin decrease with age, and thus, the search for substances that minimize cutaneous ageing has increased in the last few years. The secretion of the mollusc Cryptomphalus Aspersa (SCA) is a natural product that bears regenerative properties when applied topically. The purpose of this work is to study the in vitro effects of SCA on cell proliferation and migration, as well as on cell–cell (E-cadherin and ?-catenin) and cell–substrate (vinculin and ?1-integrin) adhesion proteins expression, using a human keratinocyte cell line (HaCaT cells) and primary dermal fibroblasts (HF). We tested the effects of SCA on cell proliferation using a colorimetric assay. In addition, SCA-induced changes on cell migration were studied by wound-healing assays. Besides, Western blot and immunofluorescence microscopy were carried out to test the expression of different cell adhesion proteins. We found that SCA promotes proliferation and migration of HaCaT cells in a time- and dose-dependent manner. Moreover, treatment with SCA increases the migratory behaviour and the expression of adhesion molecules in both HaCaT and HF. Finally, SCA also improves cell survival and promotes phosphorylation of FAK and nuclear localization of ?-catenin. These results shed light on the molecular mechanisms underlying the regenerative properties of SCA, based on its promoting effect on skin cell migration, proliferation and survival. Moreover, these results support future clinical uses of SCA in the regeneration of wounded tissues. Note de contenu : - MATERIALS AND METHODS : SCA production - Cell cultures - MTT viability assay - Migration (wound-healing) assays - Immunostaining - Western blot analysis
- RESULTS : SCA treatment induces proliferation of HaCaT cells - SCA treatment stimulates migration of HaCaT cells and human fibroblasts - SCA treatment increases the expression of cell-cell and cell-substrate adhesion molecules - SCA treatment promotes the expression of survival molecules in keratinocytes and human fibroblastsDOI : 10.1111/j.1468-2494.2011.00699.x En ligne : https://onlinelibrary.wiley.com/doi/10.1111/j.1468-2494.2011.00699.x Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14390
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