{"id":2163,"date":"2025-12-11T04:13:22","date_gmt":"2025-12-11T04:13:22","guid":{"rendered":"https:\/\/subject157.com\/?p=2163"},"modified":"2025-12-19T03:04:34","modified_gmt":"2025-12-19T03:04:34","slug":"semax-e-a-modulacao-das-vias-melanocortinas-evidencia-em-neuroprotecao-bdnf-e-plasticidade-cognitiva-2025","status":"publish","type":"post","link":"https:\/\/subject157.com\/fr\/semax-e-a-modulacao-das-vias-melanocortinas-evidencia-em-neuroprotecao-bdnf-e-plasticidade-cognitiva-2025\/","title":{"rendered":"Semax et la modulation des voies m\u00e9lanocortines : preuves en mati\u00e8re de neuroprotection, BDNF et plasticit\u00e9 cognitive (2025)"},"content":{"rendered":"
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R\u00e9sum\u00e9<\/h2>\n\n\n\n

Semax est un heptapeptide d\u00e9riv\u00e9 de l'ACTH(4\u20137), modifi\u00e9 pour potentialiser les effets neuromodulateurs sans activation adr\u00e9nale p\u00e9riph\u00e9rique. Des \u00e9tudes publi\u00e9es entre 1990 et 2024 d\u00e9montrent que Semax augmente l'expression du BDNF, module les voies m\u00e9lanocortines, conf\u00e8re une neuroprotection contre l'hypoxie\/isch\u00e9mie et am\u00e9liore les param\u00e8tres d'attention, de m\u00e9moire et de traitement cognitif. Cette revue compile des preuves cliniques et pr\u00e9cliniques, en organisant les m\u00e9canismes biologiques centraux et les r\u00e9sultats exp\u00e9rimentaux.<\/p>\n\n\n\n

\n\n\n\n

1. Introduction<\/h2>\n\n\n\n

Semax a \u00e9t\u00e9 d\u00e9velopp\u00e9 \u00e0 l'Institut russe de recherche biom\u00e9dicale comme :<\/p>\n\n\n\n

    \n
  • Agent neuroprotecteur<\/li>\n\n\n\n
  • Modulateur cognitif<\/li>\n\n\n\n
  • R\u00e9gulateur du stress neuroendocrinien<\/li>\n<\/ul>\n\n\n\n

    Il est d\u00e9riv\u00e9 du fragment ACTH(4\u20137) avec une modification Pro-Gly-Pro qui augmente la stabilit\u00e9 et prolonge l'action centrale.<\/p>\n\n\n\n

    Contrairement \u00e0 l'ACTH compl\u00e8te :<\/p>\n\n\n\n

      \n
    • Non<\/strong> stimule le cortisol<\/li>\n\n\n\n
    • Non<\/strong> active l'axe HPA de mani\u00e8re syst\u00e9mique<\/li>\n\n\n\n
    • Agit principalement au niveau neurologique<\/li>\n<\/ul>\n\n\n\n

      Utilis\u00e9 \u00e0 titre exp\u00e9rimental dans :<\/p>\n\n\n\n

        \n
      • D\u00e9ficits cognitifs<\/li>\n\n\n\n
      • R\u00e9cup\u00e9ration apr\u00e8s hypoxie\/isch\u00e9mie<\/li>\n\n\n\n
      • Augmentation de l'attention ex\u00e9cutive<\/li>\n\n\n\n
      • \u00c9tats de stress<\/li>\n\n\n\n
      • Plasticit\u00e9 neuronale<\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n

        2. M\u00e9canismes biologiques fondamentaux<\/h2>\n\n\n\n

        2.1 Via la m\u00e9lanocortine (MC4R et MC5R)<\/h3>\n\n\n\n

        Semax interagit avec :<\/p>\n\n\n\n

          \n
        • R\u00e9cepteurs de la m\u00e9lanocortine MC4R<\/li>\n\n\n\n
        • R\u00e9cepteurs de la m\u00e9lanocortine MC5R<\/li>\n<\/ul>\n\n\n\n

          Effets :<\/p>\n\n\n\n

            \n
          • Augmentation contr\u00f4l\u00e9e de l'excitabilit\u00e9 neuronale<\/li>\n\n\n\n
          • R\u00e9gulation de l'\u00e9quilibre glutamate\/GABA<\/li>\n\n\n\n
          • Modulation de la r\u00e9ponse au stress<\/li>\n<\/ul>\n\n\n\n

            La voie de la m\u00e9lanocortine est essentielle pour :<\/p>\n\n\n\n

              \n
            • Cognition<\/li>\n\n\n\n
            • Humour<\/li>\n\n\n\n
            • Neuroplasticit\u00e9<\/li>\n\n\n\n
            • Hom\u00e9ostasie autonome<\/li>\n<\/ul>\n\n\n\n
              \n\n\n\n

              2.2 R\u00e9gulation \u00e0 la hausse du BDNF (l'effet le plus constant)<\/h3>\n\n\n\n

              BDNF (facteur neurotrophique d\u00e9riv\u00e9 du cerveau) :<\/p>\n\n\n\n

                \n
              • Soutient la croissance et la survie neuronales<\/li>\n\n\n\n
              • Module la formation des synapses<\/li>\n\n\n\n
              • Augmente l'apprentissage et la consolidation de la m\u00e9moire<\/li>\n<\/ul>\n\n\n\n

                Des \u00e9tudes montrent que :<\/p>\n\n\n\n

                  \n
                • \u2191 BDNF dans le cortex pr\u00e9frontal<\/li>\n\n\n\n
                • \u2191 BDNF dans l'hippocampe<\/li>\n\n\n\n
                • \u2191 expression du NGF dans certains mod\u00e8les<\/li>\n<\/ul>\n\n\n\n

                  Ces effets se produisent m\u00eame lors d'administrations de courte dur\u00e9e.<\/p>\n\n\n\n

                  \n\n\n\n

                  2.3 Plasticit\u00e9 synaptique<\/h3>\n\n\n\n

                  Semax active plusieurs voies :<\/p>\n\n\n\n

                    \n
                  • ERK<\/li>\n\n\n\n
                  • CREB<\/li>\n\n\n\n
                  • PI3K<\/li>\n\n\n\n
                  • mTOR (l\u00e9ger et d\u00e9pendant de la dose)<\/li>\n<\/ul>\n\n\n\n

                    Cons\u00e9quences :<\/p>\n\n\n\n

                      \n
                    • Am\u00e9lioration de la m\u00e9moire de travail<\/li>\n\n\n\n
                    • Am\u00e9lioration de l'apprentissage spatial<\/li>\n\n\n\n
                    • Augmentation de la synaptogen\u00e8se<\/li>\n\n\n\n
                    • R\u00e9cup\u00e9ration apr\u00e8s un stress<\/li>\n<\/ul>\n\n\n\n
                      \n\n\n\n

                      2.4 Neuroprotection contre l'hypoxie et l'isch\u00e9mie<\/h3>\n\n\n\n

                      Semax a d\u00e9montr\u00e9 sa capacit\u00e9 \u00e0 prot\u00e9ger les neurones dans les mod\u00e8les suivants :<\/p>\n\n\n\n

                        \n
                      • Interruption du flux sanguin<\/li>\n\n\n\n
                      • Enc\u00e9phalopathie hypoxique<\/li>\n\n\n\n
                      • Stress oxydatif<\/li>\n\n\n\n
                      • Inflammation induite<\/li>\n<\/ul>\n\n\n\n

                        Les m\u00e9canismes comprennent :<\/p>\n\n\n\n

                          \n
                        • R\u00e9duction des ROS<\/li>\n\n\n\n
                        • Augmentation des enzymes antioxydantes<\/li>\n\n\n\n
                        • R\u00e9gulation du glutamate<\/li>\n\n\n\n
                        • Inhibition de l'apoptose pr\u00e9coce<\/li>\n<\/ul>\n\n\n\n
                          \n\n\n\n

                          2.5 R\u00e9gulation de la r\u00e9ponse au stress<\/h3>\n\n\n\n

                          Semax :<\/p>\n\n\n\n

                            \n
                          • R\u00e9duit l'impact de l'hyperactivation de l'axe HPA<\/li>\n\n\n\n
                          • Peut normaliser les niveaux d'anxi\u00e9t\u00e9 induite<\/li>\n\n\n\n
                          • Am\u00e9liore l'attention soutenue dans les environnements stressants<\/li>\n<\/ul>\n\n\n\n

                            Des \u00e9tudes observationnelles montrent une am\u00e9lioration des performances cognitives sous pression.<\/p>\n\n\n\n

                            \n\n\n\n

                            3. Preuve pr\u00e9clinique et clinique<\/h2>\n\n\n\n

                            3.1 \u00c9tudes cognitives<\/h3>\n\n\n\n

                            Am\u00e9liorations observ\u00e9es dans :<\/p>\n\n\n\n

                              \n
                            • Vitesse de traitement<\/li>\n\n\n\n
                            • Attention ex\u00e9cutive<\/li>\n\n\n\n
                            • M\u00e9moire de travail<\/li>\n\n\n\n
                            • Performance dans les t\u00e2ches visuelles complexes<\/li>\n\n\n\n
                            • \u00c9tats post-stress aigu<\/li>\n<\/ul>\n\n\n\n
                              \n\n\n\n

                              3.2 \u00c9tudes sur les l\u00e9sions c\u00e9r\u00e9brales<\/h3>\n\n\n\n

                              Les mod\u00e8les d'isch\u00e9mie ont d\u00e9montr\u00e9 :<\/p>\n\n\n\n

                                \n
                              • R\u00e9duction de la perte neuronale<\/li>\n\n\n\n
                              • R\u00e9cup\u00e9ration fonctionnelle acc\u00e9l\u00e9r\u00e9e<\/li>\n\n\n\n
                              • R\u00e9duction de l'inflammation gliale<\/li>\n<\/ul>\n\n\n\n
                                \n\n\n\n

                                3.3 \u00c9tudes chez les personnes \u00e2g\u00e9es<\/h3>\n\n\n\n

                                Avantages :<\/p>\n\n\n\n

                                  \n
                                • Am\u00e9lioration de la m\u00e9moire \u00e9pisodique<\/li>\n\n\n\n
                                • Augmentation de la motivation et de l'\u00e9nergie mentale<\/li>\n\n\n\n
                                • R\u00e9duction du \u00ab ralentissement \u00bb cognitif<\/li>\n<\/ul>\n\n\n\n

                                  Effets attribu\u00e9s \u00e0 l'augmentation du BDNF + am\u00e9lioration synaptique.<\/p>\n\n\n\n

                                  \n\n\n\n

                                  4. Biodisponibilit\u00e9 et pharmacodynamique<\/h2>\n\n\n\n
                                    \n
                                  • Administration typique dans le cadre de la recherche : intranasale<\/li>\n\n\n\n
                                  • Absorption \u00e0 travers la lame cribl\u00e9e<\/li>\n\n\n\n
                                  • Action centrale rapide<\/li>\n\n\n\n
                                  • Demi-vie : estim\u00e9e entre 12 et 20 minutes<\/li>\n\n\n\n
                                  • Effets prolong\u00e9s via des cascades de signalisation<\/li>\n<\/ul>\n\n\n\n

                                    M\u00eame avec une demi-vie courte, il influence les heures de plasticit\u00e9.<\/p>\n\n\n\n

                                    \n\n\n\n

                                    5. Applications dans la recherche<\/h2>\n\n\n\n

                                    5.1 Cognition et performance intellectuelle<\/h3>\n\n\n\n

                                    Domaines dans lesquels Semax s'est r\u00e9v\u00e9l\u00e9 efficace :<\/p>\n\n\n\n

                                      \n
                                    • Apprentissage acc\u00e9l\u00e9r\u00e9<\/li>\n\n\n\n
                                    • T\u00e2ches n\u00e9cessitant une attention soutenue<\/li>\n\n\n\n
                                    • Charge cognitive \u00e9lev\u00e9e<\/li>\n\n\n\n
                                    • Ex\u00e9cution sous stress<\/li>\n<\/ul>\n\n\n\n
                                      \n\n\n\n

                                      5.2 Neuroprotection<\/h3>\n\n\n\n

                                      Des \u00e9tudes sugg\u00e8rent que Semax :<\/p>\n\n\n\n

                                        \n
                                      • R\u00e9duit l'apoptose<\/li>\n\n\n\n
                                      • Prot\u00e8ge contre l'hypoperfusion<\/li>\n\n\n\n
                                      • Am\u00e9liore la r\u00e9cup\u00e9ration motrice<\/li>\n\n\n\n
                                      • Stabilise la microglie r\u00e9active<\/li>\n<\/ul>\n\n\n\n
                                        \n\n\n\n

                                        5.3 Sant\u00e9 mentale et anxi\u00e9t\u00e9<\/h3>\n\n\n\n

                                        Remarques :<\/p>\n\n\n\n

                                          \n
                                        • R\u00e9duction de l'anxi\u00e9t\u00e9 l\u00e9g\u00e8re \u00e0 mod\u00e9r\u00e9e<\/li>\n\n\n\n
                                        • Am\u00e9lioration de l'humeur dans un contexte de stress<\/li>\n\n\n\n
                                        • Augmentation de la capacit\u00e9 de concentration<\/li>\n<\/ul>\n\n\n\n
                                          \n\n\n\n

                                          6. S\u00e9curit\u00e9, effets secondaires et contre-indications<\/h2>\n\n\n\n

                                          G\u00e9n\u00e9ralement bien tol\u00e9r\u00e9<\/h3>\n\n\n\n

                                          Effets d\u00e9crits :<\/p>\n\n\n\n

                                            \n
                                          • L\u00e9g\u00e8re irritation nasale<\/li>\n\n\n\n
                                          • L\u00e9g\u00e8re c\u00e9phal\u00e9e<\/li>\n\n\n\n
                                          • Stimulation mentale excessive \u00e0 fortes doses<\/li>\n\n\n\n
                                          • Insomnie en cas d'utilisation trop tardive<\/li>\n<\/ul>\n\n\n\n
                                            \n\n\n\n

                                            Contre-indications th\u00e9oriques<\/h3>\n\n\n\n
                                              \n
                                            • \u00c9pilepsie (en raison d'une augmentation de l'excitabilit\u00e9)<\/li>\n\n\n\n
                                            • \u00c9tats psychotiques ou maniaques<\/li>\n\n\n\n
                                            • Grossesse\/allaitement (donn\u00e9es inexistantes)<\/li>\n\n\n\n
                                            • Troubles anxieux s\u00e9v\u00e8res sans surveillance<\/li>\n<\/ul>\n\n\n\n
                                              \n\n\n\n

                                              7. Conclusion<\/h2>\n\n\n\n

                                              Semax est l'un des compos\u00e9s les plus \u00e9tudi\u00e9s dans le domaine de la neuromodulation peptidique. Les preuves indiquent des effets importants sur :<\/p>\n\n\n\n

                                                \n
                                              • BDNF<\/li>\n\n\n\n
                                              • Plasticit\u00e9 synaptique<\/li>\n\n\n\n
                                              • Neuroprotection<\/li>\n\n\n\n
                                              • Fonction cognitive<\/li>\n\n\n\n
                                              • R\u00e9sistance au stress<\/li>\n<\/ul>\n\n\n\n

                                                Bien qu'il n'existe pas encore de recherche occidentale \u00e0 grande \u00e9chelle, les r\u00e9sultats obtenus au cours des 30 derni\u00e8res ann\u00e9es montrent un profil prometteur pour les \u00e9tudes exploratoires en neurosciences appliqu\u00e9es.<\/p>\n\n\n\n

                                                \n\n\n\n
                                                \n
                                                \n
                                                \n
                                                \n

                                                R\u00e9f\u00e9rences<\/h2>\n\n\n\n
                                                  \n
                                                1. Ashmarin et al. (1995). D\u00e9veloppement et effets neurobiologiques du Semax.<\/em> Neurosciences et physiologie comportementale.<\/li>\n\n\n\n
                                                2. Dolotov et al. (2006). R\u00e9gulation \u00e0 la hausse du BDNF et du NGF induite par Semax.<\/em> Rapports sur la biologie mol\u00e9culaire.<\/li>\n\n\n\n
                                                3. Andreeva et al. (2010). Semax am\u00e9liore les fonctions cognitives dans des conditions de stress.<\/em> Neuroscience Letters.<\/li>\n\n\n\n
                                                4. Yarkova et al. (2013). Neuroprotection contre l'isch\u00e9mie via les voies de la m\u00e9lanocortine.<\/em> Recherche sur le cerveau.<\/li>\n\n\n\n
                                                5. Myasoedov et al. (2018). M\u00e9canismes d'action du Semax dans la plasticit\u00e9 synaptique.<\/em> Frontiers in Neuroscience.<\/li>\n<\/ol>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n

                                                  <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

                                                  Revue scientifique sur le Semax, abordant les voies m\u00e9lanocortines, l'augmentation du BDNF, la neuroprotection et les effets observ\u00e9s sur la fonction cognitive et la r\u00e9ponse au stress.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[10],"tags":[84,79,87,77,81,86,82,80,85,88,76,78,83],"class_list":["post-2163","post","type-post","status-publish","format-standard","hentry","category-journal","tag-aprendizagem","tag-bdnf","tag-cognicao","tag-isquemia","tag-mc4r","tag-mc5r","tag-melanocortinas","tag-neuromodulacao","tag-neuroprotecao","tag-peptideos-neurologicos","tag-plasticidade-neural","tag-semax","tag-stress-cognitivo"],"acf":[],"_links":{"self":[{"href":"https:\/\/subject157.com\/fr\/wp-json\/wp\/v2\/posts\/2163","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/subject157.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/subject157.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/subject157.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/subject157.com\/fr\/wp-json\/wp\/v2\/comments?post=2163"}],"version-history":[{"count":0,"href":"https:\/\/subject157.com\/fr\/wp-json\/wp\/v2\/posts\/2163\/revisions"}],"wp:attachment":[{"href":"https:\/\/subject157.com\/fr\/wp-json\/wp\/v2\/media?parent=2163"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/subject157.com\/fr\/wp-json\/wp\/v2\/categories?post=2163"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/subject157.com\/fr\/wp-json\/wp\/v2\/tags?post=2163"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}