Introdução ao Equipamento <ol><li> Tecido é cuidadosamente dissociada, utilizando tubos de violeta C em uma única célula viável suspensões. </li><li> O PBS / BSA-tampão de EDTA é utilizado para dissociar as células. O buffer é preparada por adição de 1 parte de solução de BSA estoque para 20 partes de autoMACS lavagem solução contendo EDTA. </li><li> O MACS pré-separação Filtros são usados ​​para que as amostras de tecido dissociado estão livres de todos os aglomerados de células, promovendo a separação MACS sucesso e posterior análise. </li></ol> Dissociar as células do baço <ol><li> Baços todo são disscociated em uma única célula suspensões de esplenócitos usando o Dissociator gentleMACS. </li><li> Para iniciar o procedimento, coloque o tubo C com um volume de tampão de acordo com a massa do baço. Um baço saudável de um jovem adulto camundongo BALB / c fêmeas pesa cerca de 80-120 mg. Cada 1 a 2 baços dessa massa necessitam de 3 mL de tampão. Baços de animais mais velhos ou animais com infecções são muitas vezes maiores e devem ser pesados ​​em buffer. Os volumes de buffer deve ser adaptado em conformidade. Não exceder o volume total do buffer de 10 mL. </li><li> Adicione o baço dissecados para o tubo C contendo 3 ml de tampão. </li><li> Certifique-se de que a tampa do tubo C é apertado e conecte o tubo C ao dissociator com a tampa para baixo. </li><li> Ligue o dissociator. Por 1-2 baços, selecione m_spleen_01 programa. O programa terá 56 segundo para ser concluído. Se o número de baços é maior, usar o programa m_spleen_04; este programa pode ser usado para até 720 mg de tecido esplênico. </li><li> Após a conclusão do programa, o tecido do baço nativa é dissociada em uma suspensão esplenócitos. </li><li> Girar a suspensão de células inteiras em 300xg em temperatura ambiente por cerca de 30 seg. Isso irá garantir que o rotor eo estator são libertados de todas as células que são coletados na parte inferior do tubo C. </li><li> Retirar a amostra através do septo, selada abertura da tampa do tubo C usando uma pipeta 1000 microlitro. </li></ol> Etapa de filtração <ol><li> Para começar a etapa de filtração, aplicar o tecido dissociado para o Filtro de pré-separação ou um filtro de células com 30 mM tamanho dos poros. O filtro deve caber um tubo de 15 mL por 1-2 baços ou um tubo de 50 mL por mais de 2 baços. </li><li> Deixe a suspensão de células passar. Em seguida, lave o filtro através da aplicação de 5 mL de tampão. </li><li> Agora, centrifugar o tubo com a suspensão de células em 300xg, em temperatura ambiente por 10 minutos para coletar todos os esplenócitos em um baço pellet celular. </li><li> Agora, que temos uma pelota de esplenócitos dissociados, devemos aspirar o sobrenadante e ressuspender o pellet celular em uma quantidade adequada de buffer. </li></ol> Dissociação baço usando o Dissociator gentleMACS renderá uma elevada percentagem de esplenócitos viável, o que é demonstrado por citometria de fluxo usando o Analisador MACSQuant. Células mortas estão manchadas pelo iodeto de propídio. No exemplo fornecido, o atacante lado gráfico de pontos de dispersão mostra o esplenócitos preparado.

Todos os protocolos e fichas de dados estão disponíveis em<a href="http://www.miltenyibiotec.com"&gt; Http://www.miltenyibiotec.com.</a&gt;.

Para evitar dissociações manuais entediantes e muitas vezes doloroso, o Dissociator gentleMACS permite dissociar o tecido de forma muito eficiente sob condições controladas e reproduzíveis. O tecido procedimento de dissociação é suave para as células e suspensões colheitas de células com uma taxa alta viabilidade. O Dissociator gentleMACS em combinação com C Tubes é projetado para a preparação de uma única célula suspensões de vários tecidos. O instrumento é equipado com uma série de programas pré-definidos para dissociar baço mouse, fígado, pulmão, ou tecido neural. A gama de programas e protocolos será continuamente ampliado para incluir outros tecidos.

<table><tbody><tr><td>gentleMACS&amp;#8482; Starting Kit</td><td>Miltenyi Biotec</td><td>130-093-235</td><td>&lt;a href=&quot;http://www.miltenyibiotec.com/en/PG_709_763_gentleMACS_Dissociator.aspx&quot;&gt;http://www.miltenyibiotec.com/en/PG_709_763_gentleMACS_Dissociator.aspx&lt;/a&gt;</td></tr><tr><td>C Tubes</td><td>Miltenyi Biotec</td><td>130-093-237</td><td>&lt;a href=&quot;http://www.miltenyibiotec.com/en/PG_709_765_gentleMACS_C_Tubes.aspx&quot;&gt;http://www.miltenyibiotec.com/en/PG_709_765_gentleMACS_C_Tubes.aspx&lt;/a&gt;</td></tr><tr><td>13 mL Tubes</td><td>Miltenyi Biotec</td><td>130-091-596</td><td>&lt;a href=&quot;http://www.miltenyibiotec.com/en/PG_34_751_13_mL_Tubes_for_LS_Columns.aspx&quot;&gt;http://www.miltenyibiotec.com/en/PG_34_751_13_mL_Tubes_for_LS_Columns.aspx&lt;/a&gt;</td></tr><tr><td>autoMACS&amp;#8482; Rinsing Solution </td><td>Miltenyi Biotec</td><td>130-091-222</td><td>&lt;a href=&quot;http://www.miltenyibiotec.com/en/PG_134_155_autoMACS_Rinsing_Solution.aspx&quot;&gt;http://www.miltenyibiotec.com/en/PG_134_155_autoMACS_Rinsing_Solution.aspx&lt;/a&gt;</td></tr><tr><td>MACS&amp;#174; BSA Stock Solution</td><td>Miltenyi Biotec</td><td>130-091-376</td><td>&lt;a href=&quot;http://www.miltenyibiotec.com/en/PG_33_295_MACS_BSA_Stock_Solution.aspx&quot;&gt;http://www.miltenyibiotec.com/en/PG_33_295_MACS_BSA_Stock_Solution.aspx&lt;/a&gt;</td></tr><tr><td>Pre-Separation Filters </td><td>Miltenyi Biotec</td><td>130-041-407</td><td>&lt;a href=&quot;http://www.miltenyibiotec.com/en/PG_34_247_Pre_Separation_Filters.aspx&quot;&gt;http://www.miltenyibiotec.com/en/PG_34_247_Pre_Separation_Filters.aspx&lt;/a&gt;</td></tr><tr><td>MACSQuant Analyzer</td><td>Miltenyi Biotec</td><td>130-092-197</td><td></td></tr><tr><td>Propidium Iodide Solution</td><td>Miltenyi Biotec</td><td>130-093-233</td><td>&lt;a href=&quot;http://www.miltenyibiotec.com/en/PG_337_744_Propidium_Iodide_Solution.aspx&quot;&gt;http://www.miltenyibiotec.com/en/PG_337_744_Propidium_Iodide_Solution.aspx&lt;/a&gt;</td></tr></tbody></table>

preparation of single-cell suspensions from mouse spleen with the gentlemacs dissociator

De uma única célula suspensões são um pré-requisito para experimentos na separação de células, a análise de células e cultura de células. Para evitar dissociações manual tedioso e doloroso o Dissociator gentleMACS permite dissociar o tecido de forma muito eficiente sob condições controladas e reproduzíveis. O Dissociator gentleMACS pode perfeitamente dissociar baço mouse, combinando economia de tempo e padronização com segurança do usuário. Este vídeo descreve como dissociar baços mouse usando o Dissociator gentleMACS, um dispositivo de bancada automatizado que pode atrapalhar mecanicamente tecidos utilizando tubos especiais para produzir suspensões de células viáveis. Após a dissociação, baços são filtradas, centrifugadas e ressuspendidas para outras aplicações.

Watch this Scientific Journal Video about Preparation of Single-Cell Suspensions from Mouse Spleen with the gentleMACS Dissociator at JoVE.com

Preparation of Single-Cell Suspensions from Mouse Spleen with the gentleMACS Dissociator

Este vídeo descreve uma técnica simples e que economiza tempo para a dissociação de tecidos automatizado utilizando o Dissociator gentleMACS para preparar uma única célula suspensões de esplenócitos mouse.

Preparação de uma única célula Suspensões de Spleen rato com o Dissociator gentleMACS

Single-cell suspensions are a prerequisite for experiments in cell separation, cell analysis and cell culture.  To avoid tedious and often painful manual ...

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preparation-single-cell-suspensions-from-mouse-spleen-with-gentlemacs

Universidad de Cartagena UDEC

Research

JoVE Journal

Biology

37.6K visualizações.  Miltenyi Biotec,GmbH.  中文 JapaneseVersion 

Vídeo: Preparation of Single-Cell Suspensions from Mouse Spleen with the gentleMACS Dissociator

Preparation of Myeloid Derived Suppressor Cells (MDSC) from Naive and Pancreatic Tumor-bearing Mice using Flow Cytometry and Automated Magnetic Activated Cell Sorting (AutoMACS)

MDSC are a heterogeneous population of immature macrophages, dendritic cells and granulocytes that accumulate in lymphoid organs in pathological conditions including parasitic infection, inflammation, traumatic stress, graft-versus-host disease, diabetes and cancer1-7. In mice, MDSC express Mac-1 (CD11b) and Gr-1 (Ly6G and Ly6C) surface antigens7. It is important to note that MDSC are well studied in various tumor-bearing hosts where they are significantly expanded and suppress anti-tumor immune responses compared to na&iuml;ve counterparts7-10. However, depending on the pathological condition, there are different subpopulations of MDSC with distinct mechanisms and targets of suppression11,12. Therefore, effective methods to isolate viable MDSC populations are important in elucidating their different molecular mechanisms of suppression in vitro and in vivo.
Recently, the Ghansah group has reported the expansion of MDSC in a murine pancreatic cancer model. Our tumor-bearing MDSC display a loss of homeostasis and increased suppressive function compared to na&iuml;ve MDSC 13. MDSC percentages are significantly less in lymphoid compartments of na&iuml;ve vs. tumor-bearing mice. This is a major caveat, which often hinders accurate comparative analyses of these MDSC. Therefore, enriching Gr-1+ leukocytes from na&iuml;ve mice prior to Fluorescence Activated Cell Sorting (FACS) enhances purity, viability and significantly reduces sort time. However, enrichment of Gr-1+ leukocytes from tumor-bearing mice is optional as these are in abundance for quick FACS sorting. Therefore, in this protocol, we describe a highly efficient method of immunophenotyping MDSC and enriching Gr-1+ leukocytes from spleens of na&iuml;ve mice for sorting MDSC in a timely manner. Immunocompetent C57BL/6 mice are inoculated with murine Panc02 cells subcutaneously whereas na&iuml;ve mice receive 1XPBS. Approximately 30 days post inoculation; spleens are harvested and processed into single-cell suspensions using a cell dissociation sieve. Splenocytes are then Red Blood Cell (RBC) lysed and an aliquot of these leukocytes are stained using fluorochrome-conjugated antibodies against Mac-1 and Gr-1 to immunophenotype MDSC percentages using Flow Cytometry. In a parallel experiment, whole leukocytes from na&iuml;ve mice are stained with fluorescent-conjugated Gr-1 antibodies, incubated with PE-MicroBeads and positively selected using an automated Magnetic Activated Cell Sorting (autoMACS) Pro Separator. Next, an aliquot of Gr-1+ leukocytes are stained with Mac-1 antibodies to identify the increase in MDSC percentages using Flow Cytometry. Now, these Gr1+ enriched leukocytes are ready for FACS sorting of MDSC to be used in comparative analyses (na&iuml;ve vs. tumor- bearing) in in vivo and in vitro assays.

Preparation of Myeloid Derived Suppressor Cells MDSC from Naive and Pancreatic Tumor-bearing Mice using Flow Cytometry and Automated Magnetic Activated Cell Sorting AutoMACS

This is a rapid and comprehensive method of immunophenotyping Myeloid Derived Suppressor Cells (MDSC) and enriching Gr-1+ leukocytes from mouse spleens. This method uses flow cytometry and AutoMACS Cell Sorting to enrich for viable Gr-1+ leukocytes prior to FACS sorting of MDSC for use in vivo and in vitro assays.

Preparação de Mielóides derivadas de células supressoras (MDSC) de ingênuos e pâncreas Tumor-rolamento Ratos utilizando citometria de fluxo e separação de células automatizado magnético ativado (AutoMACS)

MDSC are a heterogeneous population of immature macrophages, dendritic cells and granulocytes that accumulate in lymphoid organs in pathological ...

Medicina

Standardized Preparation of Single-Cell Suspensions from Mouse Lung Tissue using the gentleMACS Dissociator

The preparation of single-cell suspensions from tissues is an important prerequisite for many experiments in cellular research. The process of dissociating whole organs requires specific parameters in order to obtain a high number of viable cells in a reproducible manner. The gentleMACS Dissociator optimizes this task with a simple, practical protocol. The instrument contains pre-programmed settings that are optimized for the efficient but gentle dissociation of a variety of tissue types, including mouse lungs. In this publication the use of the gentleMACS Dissociator on lung tissue derived from mice is demonstrated.

Dissociating cells from specific tissue types requires specific parameters for tissue agitation to obtain a high volume of viable, culturable cells. The Miltenyi gentleMACS dissociator optimizes this task with a simple, practical protocol. In this publication the use of this apparatus on lung tissue is explained.

Preparação padronizado de uma única célula Suspensões do tecido pulmonar do rato usando o Dissociator gentleMACS

The preparation of single-cell suspensions from tissues is an important prerequisite for many experiments in cellular research. The process of ...

Biologia

Generation of Single-Cell Suspensions from Mouse Neural Tissue

Within the nervous system, hundreds of neuronal and glial cell types have been described. Each specific cell type in the brain or spinal cord has a repertoire of cell surface molecules, or molecular determinants, through which it can be identified and characterized. Currently, robust cell identification and separation technologies require single-cell preparations to be generated while simultaneously limiting cell death and destruction of characteristic surface protein. The gentleMACS Dissociator, when used in combination with trypsin or papain-based dissociation kits, can effectively and gently dissociate brain tissue while preserving antigen epitopes and limiting cell loss. Standardized preparation of single-cell suspensions is achieved using C Tubes and optimized, preset gentleMACS Programs. Once generated, single-cell suspensions can be treated with monoclonal conjugates like Anti-Prominin-1 MicroBeads, which identify neural progenitors, or purified further using Myelin Removal Beads.

Dissociating cells from specific tissue types requires specific parameters for tissue aggitation to obtain a high volume of viable, culturable cells. The Miltenyi gentleMACS Dissociator optimizes this task with a simple, practical protocol. In this publication the use of this apparatus on nerual tissue is explained.

Geração de Single-Cell Tissue Suspensões de rato Neural

Within the nervous system, hundreds of neuronal and glial cell types have been described. Each specific cell type in the brain or spinal cord has a ...

Mouse Na&#239;ve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets

Antigen inexperienced (na&#239;ve) CD4+ T cells undergo expansion and differentiation to effector subsets at the time of T cell receptor (TCR) recognition of cognate antigen presented on MHC class II. The cytokine signals present in the environment at the time of TCR activation are a major factor in determining the effector fate of a na&#239;ve CD4+ T cell. Although the cytokine environment during na&#239;ve T cell activation may be complex and involve both redundant and opposing signals in vivo, the addition of various cytokine combinations during naive CD4+ T cell activation in vitro can readily promote the establishment of effector T helper lineages with hallmark cytokine and transcription factor expression. Such differentiation experiments are commonly used as a first step for the evaluation of targets believed to promote or inhibit the development of certain CD4+ T helper subsets. The addition of mediators, such as signaling agonists, antagonists, or other cytokines, during the differentiation process can also be used to study the influence of a particular target on T cell differentiation. Here, we describe a basic protocol for the isolation of na&#239;ve T cells from mouse and the subsequent steps necessary for polarizing na&#239;ve cells to various T helper effector lineages in vitro.

Mouse Na&#239;ve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets

Na&#239;ve CD4+ T cells polarize to various subsets depending on the environment at the time of activation. The differentiation of na&#239;ve CD4+ T cells to various effector subsets can be achieved in vitro through the addition of T cell receptor stimuli and specific cytokine signals.

Rato Naïve CD4<sup&gt; +</sup&gt; Isolamento de células T e<em&gt; In vitro</em&gt; Diferenciação em subpopulações de células T

Antigen inexperienced (na&#239;ve) CD4+ T cells undergo expansion and differentiation to effector subsets at the time of T cell receptor (TCR) recognition ...

Imunologia e Infecção

The Use of Flow Cytometry to Assess the State of Chromatin in T Cells

During a proper immune response, quiescent T cells become activated upon antigen presentation to their antigen-specific T cell receptor. This leads to clonal proliferation of only those T cells that bear a receptor that recognizes the antigen. Chromatin decondensation is a hallmark of T cell activation and is required for T cells to acquire the ability to proliferate after antigen engagement. This change in chromatin condensation can be detected using antibodies raised against histone proteins. These antibodies cannot bind to their epitopes in na&#239;ve T cells as well as they can in activated T cells. We describe how to simultaneously stain T cell-specific surface markers, track viability with a fixable dead cell stain, and measure chromatin status via intracellular staining of Histone H3 proteins. Stained cells are analyzed by flow cytometry and chromatin condensation status is measured as the mean fluorescence intensity (MFI) of the Histone H3 stain. Chromatin decondensation during T cell activation is demonstrated as an increase in the MFI

Flow cytometry can be utilized to assess the state of chromatin within T cells. This protocol allows scientists to interpret evidence of chromatin decondensation during T cell activation demonstrated by an increase in the mean florescence intensity (MFI) of fluorescent Histone H3 antibodies

A citometria de fluxo para avaliar o estado de cromatina em células T

During a proper immune response, quiescent T cells become activated upon antigen presentation to their antigen-specific T cell receptor. This leads to ...

Basement Membrane Matrix Encapsulated Cell Aggregation for Investigating Murine Spleen Tissue Formation

The spleen is an immune organ that plays a key role in blood-borne immune responses. The anatomical or functional loss of this tissue increases susceptibility to severe blood infections and sepsis. Auto-transplantation of spleen slices has been used clinically to replace lost tissue and restore immune function. However, the mechanism driving robust and immunologically functional spleen tissue regeneration has not been fully elucidated. Here, we aim to develop a method for aggregating and encapsulating spleen cells within a semi-solid matrix in order to investigate the cellular requirements for spleen tissue formation. Basement membrane matrix encapsulated cell constructs are amenable to both in vitro tissue culture of three-dimensional organoids as well as transplantation under the kidney capsule to directly assess in vivo tissue formation. By manipulating the input cells for aggregation and encapsulation, we demonstrate that graft-derived PDGFR&#946;+MAdCAM-1- neonatal stromal cells are required for spleen tissue regeneration under animal transplantation models.

This article describes a protocol for aggregating and encapsulating spleen cells within a semi-solid basement membrane matrix. Basement membrane matrix constructs can be used in three-dimensional culture for studying organoid development, or for in vivo transplantation and tissue regeneration studies.

Agregação celular encapsulada da matriz da membrana basal para investigação da formação do tecido do baço murino

The spleen is an immune organ that plays a key role in blood-borne immune responses. The anatomical or functional loss of this tissue increases ...

Biologia do Desenvolvimento

Isolation and Adoptive Transfer of High Salt Treated Antigen-presenting Dendritic Cells

Excess dietary salt intake contributes to inflammation and plays a vital role in the development of hypertension. We previously found that antigen-presenting dendritic cells (DCs) can sense elevated extracellular sodium leading to the activation of the NADPH oxidase and formation of isolevuglandin (IsoLG)-protein adducts. These IsoLG-protein adducts react with self-proteins and promote an autoimmune-like state and hypertension. We have developed and optimized state-of-the-art methods to study DC function in hypertension. Here, we provide a detailed protocol for isolation, in vitro treatment with elevated sodium, and adoptive transfer of murine splenic CD11c+ cells into recipient mice to study their role in hypertension.

Here, we present a protocol to isolate dendritic cells from murine spleens by magnetic cell sorting and subsequent adoptive transfer into na&#239;ve mice. The model of high-salt activated dendritic cells was chosen to explain the step-by-step procedures of adoptive transfer and flow cytometry.

Isolamento e transferência adotiva de sal alta trataram apresentadoras de células dendríticas

Excess dietary salt intake contributes to inflammation and plays a vital role in the development of hypertension. We previously found that ...

Flow Cytometric Characterization of Murine B Cell Development

Extensive studies have characterized the development and differentiation of murine B cells in secondary lymphoid organs. Antibodies secreted by B cells have been isolated and developed into well-established therapeutics. Validation of murine B cell development, in the context of autoimmune prone mice, or in mice with modified immune systems, is a crucial component of developing or testing therapeutic agents in mice and is an appropriate use of flow cytometry. Well established B cell flow cytometric parameters can be used to evaluate B cell development in the murine peritoneum, bone marrow, and spleen, but a number of best practices must be adhered to. In addition, flow cytometric analysis of B cell compartments should also complement additional readouts of B cell development. Data generated using this technique can further our understanding of wild type, autoimmune prone mouse models as well as humanized mice that can be used to generate antibody or antibody-like molecules as therapeutics.

We describe herein a simple analysis of the heterogeneity of the murine immune B cell compartment in the peritoneum, spleen, and bone marrow tissues by flow cytometry. The protocol can be adapted and extended to other mouse tissues.

Caracterização citométrica de fluxo do desenvolvimento de células B murinas

Extensive studies have characterized the development and differentiation of murine B cells in secondary lymphoid organs. Antibodies secreted by B cells ...

Optimized Protocol for Mouse Wound Healing Model with Stem Cell-Derived Exosomes

Mouse Wound Models and Preparation of Single-Cell Suspensions 

The management of acute full-thickness skin injuries presents a considerable challenge in clinical practice. The complexity of wound healing, involving diverse cell populations and the intricate wound microenvironment, complicates the assessment of treatment effects and their interactions using traditional experimental approaches. Single-cell transcriptome sequencing technology has revolutionized the understanding of cellular functions and mechanisms during wound healing. However, the variability in methodologies for creating mouse wound models introduces confounding factors that can impact experimental results. Furthermore, the process of dissociating mouse skin tissues presents significant technical hurdles, highlighting the critical need for high-quality single-cell suspensions for accurate transcriptome sequencing. Therefore, this study aims to optimize the construction of mouse wound models to accurately assess changes in wound closure while eliminating variables that could influence the subsequent sequencing result. Additionally, the preparation of single-cell suspensions was performed using both enzyme preparation protocols and test kit protocols to optimize cost and effectiveness.

Mouse Wound Models and Preparation of Single-Cell Suspensions

This study presents two crucial experimental techniques: the construction of a murine wound model for assessing wound closure and the preparation of single-cell suspensions from murine skin to preserve cellular viability.

The management of acute full-thickness skin injuries presents a considerable challenge in clinical practice. The complexity of wound healing, involving ...

T-Cell Enrichment: A Technique to Isolate T-Cells from Mixed Cell Population by Magnetic Separation

Source: Nguyen, H. D., et al. <a href="https://jove.unicartagenaproxy.elogim.com/t/60083">Bone Marrow Transplantation Platform to Investigate the Role of Dendritic Cells in Graft-versus-Host Disease.</a> J. Vis. Exp. (2020).
This video describes T-cells enrichment from the spleen of a mouse by negative selection using a magnetic separator. The technique involves targeting the other cells in the sample for depletion using antibodies or ligands directed against specific cell surface antigens.

Enriquecimento de células T: uma técnica para isolar células T da população de células mistas por separação magnética

Source: Nguyen, H. D., et al. Bone Marrow Transplantation Platform to Investigate the Role of Dendritic Cells in Graft-versus-Host Disease. J. Vis. Exp. ...

Preparação de uma única célula Suspensões de Spleen rato com o Dissociator gentleMACS

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