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DOI: 10.3791/68124-v
Sachin S. Surwase*1,2,3, Xin Ming M. Zhou*3,4, Kathryn M. Luly1,2,3, Qingfeng Zhu5,6,7, Niki Talebian6, Robert A. Anders5,6,7,8,9, Jordan J. Green1,2,3,5,8,9,10,11,12, Stephany Y. Tzeng1,2,3, Joel C. Sunshine1,3,4,5,6,8,9
1Department of Biomedical Engineering,Johns Hopkins University, 2Translational Tissue Engineering Center,Johns Hopkins University, 3Johns Hopkins Translational ImmunoEngineering Center,Johns Hopkins University, 4Department of Dermatology,Johns Hopkins University, 5Department of Oncology,Johns Hopkins University, 6Department of Pathology,Johns Hopkins University, 7Convergence Institute,Sidney Kimmel Comprehensive Cancer Center Johns Hopkins University School of Medicine, 8Bloomberg Kimmel Institute for Cancer Immunotherapy, Sidney Kimmel Comprehensive Cancer Center,Johns Hopkins University School of Medicine, 9Sidney Kimmel Comprehensive Cancer Center,Johns Hopkins University School of Medicine, 10Institute for Nanobiotechnology,Johns Hopkins University, 11Departments of Neurosurgery and Ophthalmology,Johns Hopkins University School of Medicine, 12Departments of Materials Science & Engineering and Chemical & Biomolecular Engineering,Johns Hopkins University
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Questo protocollo fornisce una guida passo passo per la progettazione di un pannello di anticorpi in immunofluorescenza multiplex per l'imaging basato su codici a barre del DNA di tessuti murini di melanoma FFPE. Descriviamo anche una pipeline di analisi delle immagini utilizzando strumenti open-source per generare approfondimenti di proteomica spaziale nel microambiente immunitario del tumore del melanoma murino.
Presentiamo un protocollo per lo sviluppo e la validazione di un pannello di immunofluorescenza multiplex per studiare i tessuti FFPE di topo e dimostriamo la sua utilità studiando campioni da un modello di melanoma trattato con nanoparticelle che rilasciano DNA plasmatico, codificando segnali immunologici per la riprogrammazione del microambiente tumorale. Nel campo mancavano protocolli di immunofluorescenza multiplex rigorosamente sviluppati e convalidati compatibili con i tessuti FFPE di topo fissati in formalina e inclusi in paraffina.
L'inclusione di paraffina fissata in formalina preserva la morfologia dei tessuti a lungo termine, è facile da maneggiare e conservare e consente la creazione di microarray di tessuti per la visualizzazione di più campioni su un singolo vetrino.
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