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<dc:title xml:lang="fr">Etude de deux halophytes, Armeria maritima (Mill.) Willd. et Helichrysum stoechas (L.) Moench : exploration phytochimique, approche biotechnologique et valorisation dermo-cosmétique</dc:title>
<dcterms:alternative xml:lang="en">Study of two halophytes, Armeria maritima (Mill.) Willd. et Helichrysum stoechas (L.) Moench : phytochemical exploration, biotechnological approach and dermocosmetic valorization.</dcterms:alternative>
<dc:subject xml:lang="fr">Armeria maritima</dc:subject>
<dc:subject xml:lang="fr">Helichrysum stoechas</dc:subject>
<dc:subject xml:lang="fr">Flavonoïdes glycosylés</dc:subject>
<dc:subject xml:lang="fr">Phénols</dc:subject>
<dc:subject xml:lang="fr">Lignanes</dc:subject>
<dc:subject xml:lang="fr">Mégastigmanes</dc:subject>
<dc:subject xml:lang="fr">Cicatrisation</dc:subject>
<dc:subject xml:lang="fr">Cytokines pro-inflammatoires</dc:subject>
<dc:subject xml:lang="fr">Antioxydant</dc:subject>
<dc:subject xml:lang="fr">Collagénase</dc:subject>
<dc:subject xml:lang="fr">Callogénèse</dc:subject>
<dc:subject xml:lang="fr">Suspensions cellulaires</dc:subject>
<dc:subject xml:lang="fr">Élicitation</dc:subject>
<dc:subject xml:lang="en">Halophytes</dc:subject>
<dc:subject xml:lang="en">Armeria maritima</dc:subject>
<dc:subject xml:lang="en">Helichrysum stoechas</dc:subject>
<dc:subject xml:lang="en">Flavonoid glycosides</dc:subject>
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<dc:subject xml:lang="en">Lignans</dc:subject>
<dc:subject xml:lang="en">Megastigmanes</dc:subject>
<dc:subject xml:lang="en">Wound-healing</dc:subject>
<dc:subject xml:lang="en">Pro-inflammatory cytokines</dc:subject>
<dc:subject xml:lang="en">Antioxidant</dc:subject>
<dc:subject xml:lang="en">Collagenase</dc:subject>
<dc:subject xml:lang="en">Callogenesis</dc:subject>
<dc:subject xml:lang="en">Cell suspensions</dc:subject>
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<tef:elementdEntree autoriteExterne="027659690" autoriteSource="Sudoc">Pharmacognosie</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="050525166" autoriteSource="Sudoc">Chimie végétale</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">L'étude phytochimique d'Armeria maritima et d'Helichrysum stoechas a permis d'isoler pour la première fois 31 molécules dans le genre Armeria dont 4 nouveaux flavonols diglycosylés, ainsi que le développement d'une stratégie de déréplication pour l'étude d'H. stoechas. Dans les deux espèces, nous avons relevé une richesse en polyphénols, qui pourraient être extraits par des techniques respectueuses de l'environnement comme la SFE. En parallèle, ces deux halophytes ont montré un fort potentiel biologique avec des extraits et des molécules dotés d'activités anti-oxydante, anti-collagénase, anti-inflammatoire ou encore cicatrisante. De plus, nous avons initié pour la première fois des suspensions cellulaires d'A. maritima et identifié des éliciteurs comme le méthyl jasmonate permettant d’augmenter dans les cellules d'H. stoechas la teneur en acide 3,5-dicaféoylquinique, un bio-marqueur de l'activité anti-inflammatoire. La production de molécules bioactives dans des cultures végétales in vitro pourrait par la suite être transposée à plus grande échelle, afin d’amplifier le potentiel de valorisation de ces deux halophytes en dermo-cosmétique.</dcterms:abstract>
<dcterms:abstract xml:lang="en">The phytochemical study of Armeria maritima and Helichrysum stoechas led to the isolation of 31 molecules never reported before in the genus Armeria, 4 of which being new flavonol diglycosides, and to the development of a dereplication strategy for the study of H. stoechas. In both species, an abundance of polyphenols was observed, which could be extracted with eco-friendly methods like SFE. Both halophytes showed a strong biological potential as their extracts and molecules demonstrated antioxidant, anti-collagenase, anti-inflammatory and wound healing activities. Moreover, we initiated for the first time cell suspensions of A. maritima, and identified elicitors, such as methyl-jasmonate, which led to H. stoechas cell suspensions with an increased content in 3,5-dicaffeoylquinic acid, a bio-marker of anti-inflammatory activity. The production of bioactive molecules in "plant cell factories" could be scaled-up to enhance the valorization potential of both halophytes in dermocosmetics.</dcterms:abstract>
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