Name: sirna transfection and emsa analyses on freshly isolated human villous cytotrophoblasts
Uploaded: 2016-09-20T08:00:00
Description: Watch this Scientific Journal Video about siRNA Transfection and EMSA Analyses on Freshly Isolated Human Villous Cytotrophoblasts at JoVE.com

עבודה זו נתמכה על ידי מענק מטעם הלאומית למדעים והנדסה מועצת המחקר של קנדה (NSERC) (# 298,527) (BB). CT נתמכה על ידי מלגת FARE מוסדית. AV נתמכה על ידי דוקטור NSERC גרהם בל מילגה. BB קיימה הקתדרה למחקר בקנדה ב Retrovirology האדם (Tier 2). הודות ביאטריקס Beisner לעזרה בתיקון הטקסט.

ועדת האתיקה UQAM אישרה הפרוטוקולים הללו, אשר נמצאים בהתאם להנחיות של ועדת האתיקה של סנט-לוק החולים של מונטריאול Universitaire Hospitalier מרכז (מונטריאול, קנדה). המשתתפים חתמו על טופס הסכמה מדעת. הכנת בינוני 1. ובידוד של ראשי Villous Cyto...

<ol>
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מחקרים על תפקוד השליה אנוש ופיתוח שופרו במידה רבה על ידי פרוטוקולים שמטרתן ייעול בידוד של אוכלוסיות תאי השליה שונות. אחת של אוכלוסיית תא שליה מיטב למד נשאר cytotrophoblasts villous, החקר אשר תועלת רבה פרוטוקולי אופטימיזציה המתירים בידוד יעיל ואמין. זו אפשרה עוד מספר ניסויים, כג?...

Human placental dysfunction is associated with the development of several pregnancy-associated diseases like preeclampsia and intrauterine growth restriction 1. An important cell constituent of the placenta is the trophoblasts, which can be classified as either extravillous or villous cytotrophoblasts. Upon fusion, villous cytotrophoblasts further differentiate into the syncytiotrophoblast layer, a multinuclear cell structure with an important role in feto-maternal exchange and hormone production 2. Human primary villous cytotrophoblasts and their differentiated counterparts represent important biological samples and allow researchers to study a number of placenta-related processes, such as cell fusion, in culture. Furthermore, substantial efforts are ongoing to identify markers that will facilitate appropriate management and improve preventive therapies specific to pregnancy-related diseases. Laboratories routinely isolate primary human villous cytotrophoblasts from fresh placentas, using a standard isolation procedure based on trypsin digestion of placenta villi 3. As cultured cytotrophoblasts lose their capacity to proliferate and quickly differentiate in a syncytiotrophoblast-like layer upon culture 4, very efficient transfection methods and optimized analysis approaches are needed. Previous studies have determined optimal conditions of transfection of these primary cytotrophoblasts 5. Herein, a different method of siRNA transfection, which has been previously tested in this cell type 6, is presented. In comparison to a lipofection-based approach, this microporation method improves transfection, as assessed by the extent of silencing of specific genes.
Promoter and gene expression studies also provide a better understanding of placental function. Although more difficult to use owing to the short time frame for which primary villous cytotrophoblasts can be cultured, promoter analyses using standard protocols can nonetheless be addressed, as previously published 7. Electrophoretic Mobility Shift Assay (EMSA) is one of these commonly used in vitro methods, allowing for fast and easy monitoring of DNA-protein interactions. Nuclear extracts from these primary trophoblasts were used to test a region of the Syncytin-2 promoter for specific interactions. Results revealed that bound factors could be detected at different time points of culture and in a specific and reproducible manner.
Data presented in this protocol confirm that our transfection approach and the EMSA protocol can be used for isolated primary villous cytotrophoblasts and will be of great use to study the diverse functions of villous cytotrophoblasts in normal or pathological conditions.

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sirna transfection and emsa analyses on freshly isolated human villous cytotrophoblasts

Human primary villous cytotrophoblasts are a very useful source of primary cells to study placental functions and regulatory mechanisms, and to comprehend diseases related to pregnancy. In this protocol, human primary villous cytotrophoblasts freshly isolated from placentas through a standard DNase/trypsin protocol are microporated with small interfering RNA (siRNA). This approach provided greater efficiency for siRNA transfection when compared to a lipofection-based method. Transfected cells can subsequently be analyzed by standard Western blot within a time frame of 3-4 days post-transfection. In addition, using cultured primary villous cytotrophoblasts, Electrophoretic Mobility Shift Assay (EMSA) analysis was optimized and performed on extracts from days 1 to 4. The use of these cultured primary cells and the protocol described allow for an evaluation of the implication of specific genes and transcription factors in the process of villous cytotrophoblast differentiation into a syncytiotrophoblast-like cell layer. However, the limited time span allowable in culture precludes the use of methods requiring more time, such as generation of a stable cell population. Therefore testing of this cell population requires highly optimized gene transfer protocols.

השליות טריות מן הריונות טווח שמשו לבודד cytotrophoblasts villous העיקרי אדם לנהל את מערך הניסויים שהוצגו באזור הפרוטוקול. בעקבות הבידוד שלהם, אנחנו ראשונים נתחו את טוהר cytotrophoblasts באמצעות השימוש בסמן cytokeratin-7 (איור 1). הכנות תא ובכך הוכתמו באמצעות נוגדן א...

Watch this Scientific Journal Video about siRNA Transfection and EMSA Analyses on Freshly Isolated Human Villous Cytotrophoblasts at JoVE.com

siRNA Transfection and EMSA Analyses on Freshly Isolated Human Villous Cytotrophoblasts

פרוטוקול זה מתאר שיטה יעילה transfecting siRNA ב cytotrophoblasts villous אדם המבודד טרי באמצעות microporation וזיהוי מתחמים-חלבון ה- DNA בתאים אלה. תאי transfected יכולים להיות במעקב על ידי כתם מערבי Emsa מנתח בזמן תרבות 4 ימים.

ניתוח Transfection siRNA ו Emsa על Cytotrophoblasts Villous אדם המבודד טרי

Human primary villous cytotrophoblasts are a very useful source of primary cells to study placental functions and regulatory mechanisms, and to comprehend ...

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מבחני מזווג Conjugative עבור ניתוח רצף ספציפי של חלבוני העברה מעורבים קוניוגציה

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Controllable Ion Channel Expression through Inducible Transient Transfection

ביטוי ערוץ יון לשליטה באמצעות Transfection ועין מתנהל חלוף

Transfection, the delivery of foreign nucleic acids into a cell, is a powerful tool in protein research. Through this method, ion channels can be ...

Single Molecule Analysis of Laser Localized Psoralen Adducts

ניתוח מולקולה בודדת של מותאמת לשפה לייזר Psoralen Adducts

The DNA Damage Response (DDR) has been extensively characterized in studies of double strand breaks (DSBs) induced by laser micro beam irradiation in live ...

Systemic Delivery of MicroRNA Using Recombinant Adeno-associated Virus Serotype 9 to Treat Neuromuscular Diseases in Rodents

משלוח מערכתית של MicroRNA באמצעות וירוס רקומביננטי Adeno-הקשורים Serotype 9 לטיפול מחלות נוירומוסקולריות אצל מכרסמים

RNA interference via the endogenous miRNA pathway regulates gene expression by controlling protein synthesis through post-transcriptional gene silencing. ...

A Standard Methodology to Examine On-site Mutagenicity As a Function of Point Mutation Repair Catalyzed by CRISPR/Cas9 and SsODN in Human Cells

מתודולוגיה סטנדרטי כדי לבדוק באתר המוטגניות כפונקציה של תיקון נקודת מוטציה על ידי CRISPR/Cas9 ו- SsODN בתאי אדם

Combinatorial gene editing using CRISPR/Cas9 and single-stranded oligonucleotides is an effective strategy for the correction of single-base point ...

Genetic Engineering of Dictyostelium discoideum Cells Based on Selection and Growth on Bacteria

Genetic Engineering of Dictyostelium discoideum Cells Based on Selection and Growth on Bacteria

הנדסה גנטית של Dictyostelium discoideum תאים בהתבסס על הבחירה וצמיחה על חיידקים

Dictyostelium discoideum is an intriguing model organism for the study of cell differentiation processes during development, cell signaling, and other ...

High-Throughput DNA Plasmid Multiplexing and Transfection Using Acoustic Nanodispensing Technology

התפוקה הגבוהה של DNA פלאגיסינג ומעבר באמצעות טכנולוגיית ננו-לחילוק אקוסטית

Cell transfection, indispensable for many biological studies, requires controlling many parameters for an accurate and successful achievement. Most often ...

Mass Spectrometry-Based Proteomics Analyses Using the OpenProt Database to Unveil Novel Proteins Translated from Non-Canonical Open Reading Frames

ניתוחים פרוטאומיקס מבוססי ספקטרומטר מסה משימוש במסד הנתונים OpenProt לחשוף את הרומן חלבונים מתורגם ממסגרות קאנונית קריאה פתוחה

Genome annotation is central to today's proteomic research as it draws the outlines of the proteomic landscape. Traditional models of open reading frame ...

Tumorsphere Derivation and Treatment from Primary Tumor Cells Isolated from Mouse Rhabdomyosarcomas

והטיפול מתאי הגידול הראשוניים מבודדים מעכבר תמס שריר

Rhabdomyosarcoma (RMS) is the most common soft tissue sarcoma in children. Although significant efforts have enabled the identification of common ...

Genetic Mapping of Thermotolerance Differences Between Species of Saccharomyces Yeast via Genome-Wide Reciprocal Hemizygosity Analysis

Genetic Mapping of Thermotolerance Differences Between Species of Saccharomyces Yeast via Genome-Wide Reciprocal Hemizygosity Analysis

מיפוי גנטי של הבדלי התרמוסבילות בין מינים של שמרים באמצעות הגנום ההופכי לניתוח המייזוליסיטי

A central goal of modern genetics is to understand how and why organisms in the wild differ in phenotype. To date, the field has advanced largely on the ...