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Università degli Studi di Milano

15 ARTICLES PUBLISHED IN JoVE

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Biology

A Novel Method for the Culture and Polarized Stimulation of Human Intestinal Mucosa Explants
Katerina Tsilingiri 1, Angelica Sonzogni 2, Flavio Caprioli 3, Maria Rescigno 1
1Department of Experimental Oncology, European Institute of Oncology, 2Department of Pathology and Laboratory Medicine, European Institute of Oncology, 3U.O. Gastroenterologia 2, IRCCS Ca' Granda, Ospedale Policlinico di Milano

We introduce a novel method for the maintenance of human intestinal mucosa in culture and monitoring of the response to various types of stimuli over at least 24 hrs. With our method, the polarity of the tissue is maintained, allowing for a physiological stimulation via the apical route.

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Biology

Visualization of Endoplasmic Reticulum Subdomains in Cultured Cells
Matteo Fossati 1,2,3, Nica Borgese 2,3,4, Sara Francesca Colombo 2,3, Maura Francolini 1,2
1Fondazione Filarete, 2Department of Biotechnology and Translational Medicine, University of Milan, 3Neuroscience Institute, National Research Council (CNR), 4Department of Health Science, "Magna Graecia" University of Catanzaro

We describe the imaging approaches we use to investigate the distribution and mobility of the transfected fluorescent proteins resident in the endoplasmic reticulum (ER) by means of the confocal imaging of living cells. We also ultrastructurally analyze the effect of their expression on the architecture of this subcellular compartment.

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Neuroscience

TIRFM and pH-sensitive GFP-probes to Evaluate Neurotransmitter Vesicle Dynamics in SH-SY5Y Neuroblastoma Cells: Cell Imaging and Data Analysis
Federica Daniele 1, Eliana S. Di Cairano 1, Stefania Moretti 1, Giovanni Piccoli 2, Carla Perego 1,3
1Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, 2San Raffaele Scientific Institute and Vita-Salute University, 3CEND Center of Excellence in Neurodegenerative Diseases, Università degli Studi di Milano

This paper provides a method for investigating neurotransmitter vesicle dynamics in neuroblastoma cells, using a synaptobrevin2-pHluorin construct and Total Internal Reflection Fluorescence Microscopy. The strategy developed for image processing and data analysis is also reported.

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Developmental Biology

Epigenetic Conversion as a Safe and Simple Method to Obtain Insulin-secreting Cells from Adult Skin Fibroblasts
Tiziana A.L. Brevini 1, Georgia Pennarossa 1, Sara Maffei 1, Alessandro Zenobi 1, Fulvio Gandolfi 1
1Laboratory of Biomedical Embryology, Unistem, Centre for Stem Cell Research, Università degli Studi di Milano

Here, a new method that allows the conversion of adult skin fibroblasts into insulin-secreting cells is presented. This technique is based on epigenetic conversion, does not involve the use of retroviral vectors nor the acquisition of a stable pluripotent state. It is therefore highly promising for translational medicine applications.

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JoVE Core

Biosensing Motor Neuron Membrane Potential in Live Zebrafish Embryos
Lorena Benedetti 1,2,3, Anna Ghilardi 4, Laura Prosperi 4, Maura Francolini *1, Luca Del Giacco *4
1Department of Medical Biotechnology and Translational Medicine, Università degli Studi di Milano, 2Department of Neuroscience; Department of Cell Biology, Howard Hughes Medical Institute, Yale University School of Medicine, 3Program in Cellular Neuroscience, Neurodegeneration and Repair, Yale University School of Medicine, 4Department of BioSciences, Università degli Studi di Milano

Protocols described here allow for the study of the electrical properties of excitable cells in the most non-invasive physiological conditions by employing zebrafish embryos in an in vivo system together with a fluorescence resonance energy transfer (FRET)-based genetically encoded voltage indicator (GEVI) selectively expressed in the cell type of interest.

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Medicine

Autologous Microfractured and Purified Adipose Tissue for Arthroscopic Management of Osteochondral Lesions of the Talus
Riccardo D'Ambrosi 1,2, Cristian Indino 1, Camilla Maccario 1, Luigi Manzi 1, Federico Giuseppe Usuelli 1
1IRCCS Istituto Ortopedico Galeazzi - C.A.S.C.O. Piede e Caviglia, 2Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano

The aim of this study is to report a protocol for the arthroscopic treatment of osteochondral lesions of the talus using microfractured and purified adipose-derived stem cells.

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Behavior

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach
Federico G. Usuelli 1, Riccardo D'Ambrosi 1,2, Luigi Manzi 1, Camilla Maccario 1,2, Cristian Indino 1
1Galeazzi Orthopedic Institute for Research and Care, 2Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano

We present our preoperative, operative, and postoperative protocols for the treatment of osteoarthritis of the ankle with total ankle replacement via lateral transfibular approach.

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Developmental Biology

Isolation and Characterization of Cardiac Mesenchymal Stromal Cells from Endomyocardial Bioptic Samples of Arrhythmogenic Cardiomyopathy Patients
Chiara Assunta Pilato *1,2, Ilaria Stadiotti *1, Angela Serena Maione 1, Valentina Saverio 1, Valentina Catto 3, Fabrizio Tundo 3, Antonio Dello Russo 3, Claudio Tondo 2,3, Giulio Pompilio 1,2, Michela Casella *3, Elena Sommariva *1
1Vascular Biology and Regenerative Medicine Unit, Centro Cardiologico Monzino-IRCCS, 2Department of Clinical Sciences and Community Health, Università degli Studi di Milano, 3Heart Rhythm Center, Centro Cardiologico Monzino-IRCCS

In this article, a method to isolate cardiac mesenchymal stromal cells from endomyocardial bioptic samples of arrhythmogenic cardiomyopathy patients is provided. Their characterization and the protocol to boost their adipogenic differentiation are described.

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Immunology and Infection

Using Robotic Systems to Process and Embed Colonic Murine Samples for Histological Analyses
Fulvia Milena Cribiù *1, Claudia Burrello *2, Roberta Tacchi 1, Francesca Boggio 1, Dario Ricca 1, Flavio Caprioli 3,4, Stefano Ferrero 1, Federica Facciotti 2
1Pathology Unit, Fondazione IRCCS Cà Granda, Ospedale Maggiore Policlinico, 2Department of Experimental Oncology, European Institute of Oncology, 3Gastroenterology and Endoscopy Unit, Fondazione IRCCS Cà Granda, Ospedale Maggiore Policlinico, 4Department of Pathophysiology and Transplantation, Università degli Studi di Milano

Lack of standardization for murine tissue processing reduces the quality of murine histopathological analysis as compared to human specimens. Here, we present a protocol to perform histopathological examination of murine inflamed and uninflamed colonic tissues to show the feasibility of robotic systems routinely used for processing and embedding human samples.

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Immunology and Infection

Phage Therapy Application to Counteract Pseudomonas aeruginosa Infection in Cystic Fibrosis Zebrafish Embryos
Marco Cafora 1,2, Francesca Forti 3, Federica Briani 3, Daniela Ghisotti 3, Anna Pistocchi 2
1Dipartimento di Scienze Cliniche e Comunità, Università degli Studi di Milano, 2Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, LITA, 3Dipartimento di Bioscienze, Università degli Studi di Milano

Presented here is a protocol for Pseudomonas aeruginosa infection and phage therapy application in cystic fibrosis (CF) zebrafish embryos.

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Developmental Biology

Minimum Volume Vitrification of Immature Feline Oocytes
Martina Colombo 1, Gaia C. Luvoni 1
1Dipartimento di Scienze Veterinarie per la Salute, la Produzione Animale e la Sicurezza Alimentare 'Carlo Cantoni', Università degli Studi di Milano

This manuscript describes a protocol for the minimum volume vitrification of immature cat oocytes with laboratory-made media on commercial supports. It covers every step from oocyte isolation from ex vivo gonads to vitrification and warming.

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Biology

A Two-Step Strategy that Combines Epigenetic Modification and Biomechanical Cues to Generate Mammalian Pluripotent Cells
Georgia Pennarossa 1, Sergio Ledda 2, Sharon Arcuri 1, Fulvio Gandolfi 3, Tiziana A. L. Brevini 1
1Laboratory of Biomedical Embryology, Department of Health, Animal Science and Food Safety and Center for Stem Cell Research, Università degli Studi di Milano, 2Department of Veterinary Medicine, University of Sassari, 3Department of Agricultural and Environmental Sciences - Production, Landscape, Agroenergy and Center for Stem Cell Research, Università degli Studi di Milano

We here present a method that combines the use of chemical epigenetic erasing with mechanosensing-related cues to efficiently generate mammalian pluripotent cells, without the need of gene transfection or retroviral vectors. This strategy is, therefore, promising for translational medicine and represents a notable advancement in stem cell organoid technology.

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Biology

Microvascular and Macrovascular Endothelial Cell Isolation and Purification from Lung-Derived Samples
Roberto Plebani 1,2, Alessandra D'Alessandro 2, Paola Lanuti 2,3, Pasquale Simeone 2,3, Massimiliano Cinalli 1, Ilaria Righi 4, Alessandro Palleschi 4,5, Matteo Mucci 1,2, Marco Marchisio 2,3, Francesco Cappabianca 1, Marina Camera 6,7, Felice Mucilli 1, Mario Romano 1,2
1Department of Medical, Oral and Biotechnological Sciences, “G. d’Annunzio” University of Chieti-Pescara, 2Center on Advanced Studies and Technology (CAST), “G. d’Annunzio” University of Chieti-Pescara, 3Department of Medicine and Aging Sciences, University “G. d’Annunzio” of Chieti-Pescara, 4U.O. di Chirurgia Toracica e dei Trapianti di Polmone, Fondazione IRCCS Ca’ Granda - Ospedale Maggiore Policlinico di Milano, 5Dipartimento di Fisiopatologia Medico-Chirurgica e dei Trapianti, Università degli Studi di Milano, 6Department of Pharmaceutical Sciences, Università degli Studi di Milano, 7Unit of Cell and Molecular Biology in Cardiovascular Diseases, Centro Cardiologico Monzino IRCCS

Although challenging, the isolation of pulmonary endothelial cells is essential for studies on lung inflammation. The present protocol describes a procedure for the high-yield, high-purity isolation of macrovascular and microvascular endothelial cells.

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Engineering

A Computer Vision System for the Assessment of Ice Cream Melting Behavior
Eleonora Loffredi 1, Cristina Alamprese 1
1Department of Food, Environmental and Nutritional Sciences (DeFENS), Università degli Studi di Milano

Here, we present a protocol based on a computer vision system (CVS) to determine the melting behavior of multi-phase food systems.

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Biology

Flow Cytometry Analysis of Tissue Factor Expression in Human Platelets
Marta Brambilla 1, Alessia Becchetti 1, Kevin Nallio 1, Marina Camera 1,2
1Centro Cardiologico Monzino IRCCS, 2Department of Pharmaceutical Sciences, Università degli Studi di Milano

This article outlines the protocol for quantifying the percentage of Tissue Factor (TF)-positive platelets using whole blood flow cytometry, assessing the protein: (1) intracellularly in resting conditions, and (2) on the cell surface, in both resting and activated conditions. Guidance is also provided for evaluating TF-positive platelets in platelet-rich plasma.

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