{"id":794,"date":"2026-09-01T17:35:05","date_gmt":"2026-09-01T17:35:05","guid":{"rendered":"https:\/\/nhdbio.com\/resources\/oxytocin-nonapeptide-disulfide-stability-quality-guide\/"},"modified":"2026-09-08T07:30:41","modified_gmt":"2026-09-08T07:30:41","slug":"oxytocin-nonapeptide-disulfide-stability-quality-guide","status":"publish","type":"post","link":"https:\/\/nhdbio.com\/fr\/oxytocin-nonapeptide-disulfide-stability-quality-guide\/","title":{"rendered":"Guide d'identit\u00e9 de l'ocytocine\u00a0: nonapeptide, disulfure et stabilit\u00e9"},"content":{"rendered":"<p class=\"pim-standfirst wp-block-paragraph\">L'ocytocine est un nonapeptide cyclique avec un pont disulfure Cys1 \u2013 Cys6 et un amide C-terminal. La s\u00e9quence, l'\u00e9tat disulfure, le contre-ion, l'agr\u00e9gation et la puissance sont des attributs de qualit\u00e9 distincts.<\/p><div class=\"wp-block-group pim-key-takeaways\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Les preuves en un coup d'\u0153il<\/h2><ul class=\"wp-block-list\"><li>PubChem r\u00e9pertorie la s\u00e9quence CYIQNCPLG, la formule C43H66N12O12S2 et le poids mol\u00e9culaire 1007.2 g\/mol.<\/li><li>Une \u00e9tude de d\u00e9gradation a r\u00e9v\u00e9l\u00e9 la perte d'ocytocine intacte la plus rapide au pH 9.0 et la plus lente parmi les conditions test\u00e9es au pH 4.5.<\/li><li>Les voies de d\u00e9gradation identifi\u00e9es comprenaient la d\u00e9samidation, l'alt\u00e9ration des ponts de soufre, les dim\u00e8res, la b\u00eata-\u00e9limination et les agr\u00e9gats plus gros.<\/li><\/ul><\/div><\/div><figure class=\"wp-block-image size-full pim-article-figure\"><img loading=\"lazy\" decoding=\"async\" width=\"1672\" height=\"941\" src=\"http:\/\/nhdbio.com\/wp-content\/uploads\/2026\/09\/oxytocin-quality.webp\" alt=\"Stabilit\u00e9 documentaire des peptides et flux de travail HPLC\" class=\"wp-image-778\" srcset=\"https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/09\/oxytocin-quality.webp 1672w, https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/09\/oxytocin-quality-300x169.webp 300w, https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/09\/oxytocin-quality-1024x576.webp 1024w, https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/09\/oxytocin-quality-768x432.webp 768w, https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/09\/oxytocin-quality-1536x864.webp 1536w\" sizes=\"auto, (max-width: 1672px) 100vw, 1672px\" \/><figcaption class=\"wp-element-caption\">Illustration \u00e9ditoriale g\u00e9n\u00e9r\u00e9e par AI illustrant un flux de travail analytique. Il ne repr\u00e9sente pas un produit fourni, un lot lib\u00e9r\u00e9, une formulation approuv\u00e9e ou un r\u00e9sultat d'analyse.<\/figcaption><\/figure><h2 class=\"wp-block-heading\">Fiche d'identit\u00e9<\/h2><p class=\"wp-block-paragraph\">La d\u00e9signation ac\u00e9tate d\u00e9crit le contexte du contre-ion et doit \u00eatre incluse dans les calculs du contenu. L\u2019amide C-terminal du peptide et le disulfure intramol\u00e9culaire correct sont essentiels \u00e0 l\u2019identit\u00e9 de r\u00e9f\u00e9rence.<\/p><div class=\"wp-block-group pim-evidence-table\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\"><div class=\"pim-evidence-row\"><strong>S\u00e9quence<\/strong><span>Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH2<\/span><\/div><div class=\"pim-evidence-row\"><strong>Anneau<\/strong><span>Pont disulfure entre Cys1 et Cys6<\/span><\/div><div class=\"pim-evidence-row\"><strong>Formule et masse<\/strong><span>C43H66N12O12S2\u00a0; 1007.2g\/mol<\/span><\/div><div class=\"pim-evidence-row\"><strong>PubChem<\/strong><span>CID 439302<\/span><\/div><div class=\"pim-evidence-row\"><strong>Critique QC<\/strong><span>Masse intacte, \u00e9tat disulfure, peptides associ\u00e9s, agr\u00e9gation, contenu, puissance et stabilit\u00e9<\/span><\/div><\/div><\/div><h2 class=\"wp-block-heading\">Limite analytique et de preuve<\/h2><p class=\"wp-block-paragraph\">D\u00e9gradation acc\u00e9l\u00e9r\u00e9e au pH 2.0, 4.5, 7.0 et 9.0 ont montr\u00e9 une perte de pseudo-premier ordre d\u00e9pendant du pH et de la temp\u00e9rature. RP-HPLC, les m\u00e9thodes d'exclusion de taille et MS\/MS ont r\u00e9pondu \u00e0 des questions compl\u00e9mentaires sur les peptides intacts et les produits de d\u00e9gradation.<\/p><p class=\"wp-block-paragraph\">Une solution claire et une masse mol\u00e9culaire correspondante n\u2019\u00e9tablissent pas la puissance biologique et n\u2019excluent pas les agr\u00e9gats de faible niveau. Les unit\u00e9s USP du m\u00e9dicament fini appartiennent \u00e0 une formulation valid\u00e9e et ne doivent pas \u00eatre d\u00e9duites de mat\u00e9riel de recherche non li\u00e9.<\/p><h2 class=\"wp-block-heading\">R\u00e8gle \u00e9ditoriale<\/h2><p class=\"wp-block-paragraph\">Indiquez le mat\u00e9riau exact, la forme, le mod\u00e8le ou la population et le point final pris en charge par l'enregistrement cit\u00e9. Ne convertissez pas la plausibilit\u00e9 m\u00e9caniste, un r\u00e9sultat animal, une \u00e9tiquette officielle d'un m\u00e9dicament fini ou un test analytique en une all\u00e9gation concernant un lot du catalogue sans rapport.<\/p>","protected":false},"excerpt":{"rendered":"<p>L'ocytocine est un nonapeptide cyclique avec un pont disulfure Cys1 \u2013 Cys6 et un amide C-terminal. La s\u00e9quence, l'\u00e9tat disulfure, le contre-ion, l'agr\u00e9gation et la puissance sont des attributs de qualit\u00e9 distincts.<\/p>","protected":false},"author":1,"featured_media":778,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"pim_family_ids":"354","pim_article_type":"Evidence and material-quality guide","pim_evidence_level":"PubChem and DailyMed identity plus primary degradation-kinetics research","pim_reviewer":"Site evidence editorial team","pim_reviewed_date":"2026-09-02","pim_editorial_note":"Source-checked on 2026-09-02. Null results, sample size, model\/population limits and regulatory scope are retained. This is not medical advice, a customer case or validation of a catalog lot.","pim_review_status":"reviewed","pim_review_reason":"Primary and official sources, numerical results, null findings, limitations, product-evidence boundary and image disclosure checked for batch 4.","pim_creation_method":"This article discusses the source records listed below, with the study models and limitations stated alongside the findings. AI-assisted drafting and image generation were used. The reference list identifies the records behind this article; it is not an independent peer review or verification of a supplied catalog lot.","pim_sources":"[{\"title\":\"DailyMed Oxytocin Injection, USP label\",\"url\":\"https:\/\/dailymed.nlm.nih.gov\/dailymed\/lookup.cfm?setid=4c4c4b69-8bf7-472c-aafe-29805ba5c965&version=2\",\"note\":\"Official U.S. prescription label, updated March 2025.\"},{\"title\":\"Oxytocin physiology, pharmacology and labor management\",\"url\":\"https:\/\/pubmed.ncbi.nlm.nih.gov\/37460365\/\",\"note\":\"2024 clinical review; PMID 37460365.\"},{\"title\":\"Oxytocin degradation kinetics and products\",\"url\":\"https:\/\/pubmed.ncbi.nlm.nih.gov\/19343484\/\",\"note\":\"Primary formulation-degradation study; PMID 19343484.\"},{\"title\":\"PubChem Oxytocin record\",\"url\":\"https:\/\/pubchem.ncbi.nlm.nih.gov\/compound\/439302\",\"note\":\"Sequence, disulfide, formula and molecular weight; CID 439302.\"}]","footnotes":""},"categories":[20],"tags":[],"class_list":["post-794","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-evidence-quality-guides"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Oxytocin Identity Guide: Nonapeptide, Disulfide and Stability<\/title>\n<meta name=\"description\" content=\"Oxytocin is a cyclic nonapeptide with a Cys1\u2013Cys6 disulfide bridge and a C-terminal amide. 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