המחברים מבקשים להודות אלכסיי בוגדנוב עבור ייצור של תיקון, מהדק שבבי ב CPFC, וגוון טראן, פינג זאו ומתיו שיו לעזרה עם הרכבה. Naweed סייד נתמך על ידי המכון הקנדי לבריאות מחקר (CIHR) גרנט. קולין לוק הוא חתן NSERC ו אלברטה הקרן למורשת למחקר רפואי (AHFMR) studentships.

<ol>
	<li>Walz, W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Patch-Clamp+Analysis:+Advanced+Techniques.">Patch-Clamp Analysis: Advanced Techniques.</a> Neuromethods. , 38 (2007).</li><li>Neher, E., Sakmann, B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Single-channel+currents+recorded+from+membrane+of+denervated+frog+muscle+fibers.">Single-channel currents recorded from membrane of denervated frog muscle fibers.</a> Nature. 260, 799-802 (1976).</li><li>Behrends, J. C., Fertig, N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Ch.+14:+Planar+Patch-clamp.">Ch. 14: Planar Patch-clamp.</a> Neuromethods. , (2007).</li><li>Fertig, N., Tilke, A., Blick, R. H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Stable+integration+of+isolated+cell+membrane+patches+in+a+nanomachined+aperture.">Stable integration of isolated cell membrane patches in a nanomachined aperture.</a> Applied Physics Letters. 77, 1218-1220 (2000).</li><li>Dunlop, J., Bowlby, M., Peri, R., Vasilyev, D., Arias, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=High-throughput+electrophysiology:+an+emerging+paradigm+for+ion-channel+screening+and+hysiology.">High-throughput electrophysiology: an emerging paradigm for ion-channel screening and hysiology.</a> Nat. Rev. Drug. Discov. 7 (4), 358-368 (2008).</li><li>Py, C., Denhoff, M., Martina, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+novel+silicon+patch-clamp+chip+permits+high-fidelity+recording+of+ion+channel+activity+from+functionally+defined+neurons.">A novel silicon patch-clamp chip permits high-fidelity recording of ion channel activity from functionally defined neurons.</a> Biotechnology and Bioengineering. 107 (4), 593-600 (2010).</li><li>Martinez, D., Martina, M., Kremer, L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Development+of+patch-clamp+chips+for+mammalian+cell+applications.">Development of patch-clamp chips for mammalian cell applications.</a> Micro and Nanosystems. 2 (4), (2010).</li><li>Py, C., Salim, D., Monette, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Cell+to+aperture+interaction+in+patch-clamp+chips+visualized+by+fluorescence+microscopy+and+focused-ion+beam+sections.">Cell to aperture interaction in patch-clamp chips visualized by fluorescence microscopy and focused-ion beam sections.</a> Biotechnology &#38; Bioengineering. 108, 1395-1403 (2011).</li><li>Martina, M., Luk, C., Py, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Interrogation+of+Cultured+Neurons+using+Patch-Clamp+Chips.">Interrogation of Cultured Neurons using Patch-Clamp Chips.</a> Journal of Neural Engineering. 8, 034002 (2011).</li><li>Bell, H. J., Syed, N. I. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Hypoxia-induced+modulation+of+the+respiratory+CPG.">Hypoxia-induced modulation of the respiratory CPG.</a> Frontiers in bioscience : a journal and virtual library. 14, 3825-3835 (2009).</li><li>Syed, N. I., Bulloch, A. G. M., Lukowiak, K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=In+vitro+reconstruction+of+the+respiratory+central+pattern+generator+of+the+mollusk+Lymnaea.">In vitro reconstruction of the respiratory central pattern generator of the mollusk Lymnaea.</a> Science. 250, 282-285 (1990).</li><li>Syed, N. I., Zaidi, H., Lovell, P., Windhorst, U., Johansson, H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=In+vitro+reconstruction+of+neuronal+circuits:+A+simple+model+system+approach.">In vitro reconstruction of neuronal circuits: A simple model system approach.</a> Modern techniques in neuroscience research. , (1999).</li><li>Martina, M., Luk, C., Py, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Interrogation+of+Cultured+Neurons+using+Patch-Clamp+Chips.">Interrogation of Cultured Neurons using Patch-Clamp Chips.</a> Journal of Neural Engineering. 8, 034002 (2011).</li><li>Py, C., Denhoff, M., Martina, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Silicon+patch-clamp+chip+suitable+for+high-fidelity+recording+of+ion+channel+activity+from+cultured+neurons.">Silicon patch-clamp chip suitable for high-fidelity recording of ion channel activity from cultured neurons.</a> Biotechnology and Bioengineering. 107 (4), (2010).</li><li>Ong, W. -. L., Yobas, L., Ong, W. -. Y. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+missing+factor+in+chip-based+patch+clamp+assay:+gigaseal.">A missing factor in chip-based patch clamp assay: gigaseal.</a> Journal of Physics: Conference Series. 34, 187 (2006).</li><li>Charrier, A., Martinez, D., Monette, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Cell+placement+and+guidance+on+substrates+for+neurochip+interfaces.">Cell placement and guidance on substrates for neurochip interfaces.</a> Biotechnology and Bioengineering. 105, 368-373 (2010).</li><li>Diaz-Quijada, D., Maynard, C. C. o. m. a. s., Monette, T., Py, R., A, C. K. r. a. n. t. i. s., Mealing, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Surface+Patterning+with+Chemisorbed+Chemical+Cues+for+Advancing+Neurochip+Applications.">Surface Patterning with Chemisorbed Chemical Cues for Advancing Neurochip Applications.</a> Industrial &#38; Engineering Chemistry Research. 50 (17), 10029-10035 (2011).</li><li>Martinez, D., Py, C., Denhoff, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=High-fidelity+patch-clamp+recordings+from+neurons+cultured+on+a+polymer+microchip.">High-fidelity patch-clamp recordings from neurons cultured on a polymer microchip.</a> Biomedical Microdevices. 12, 977-97 (2010).</li><li>Taketani, M., Baudry, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> Advances in Network Electrophysiology: Using Multi-Electrode Arrays. , (2006).</li></ol>

אין ניגוד עניינים הצהיר.

תיקון-clamp של NRCC החקירה פלטפורמת השבבים הוא כלי רב עוצמה פוטנציאלי גבוהה מבחני תוכן ומידע התרופות לחקור במודלים חוץ גופית של המחלה. יתרונות לעומת בטפי להחדרת נוזלים זכוכית הם התנגדות גישה נמוכה, המהווה יתרון לחקור תאים גדולים, ולמרות קיבול מעט יותר תגרום דינמיקה דומה של תאים קטנים יותר. תא ספונטנית חותמות צוהר התקבלו באופן שגרתי, והכניסה לתא כולו נצפתה להיות ספונטנית 14. הבדל ברור בין שבבי ואת שיטת פיפטה זכוכית היא העובדה כי בדיקה הוא חלק מנה תרבית תאים ולא מובא באופן ידני במגע עם קרום התא. Culturing תאים, אולי חלק של רשתות פונקציונליות, התוצאות במודלים רלוונטיים מבחינה ביולוגית יותר כמודלים מחלות, מנגנון שונה לאבטחת התא גבוהה לחקור כלבי ים 16. עם זאת, בניגוד השעיות סלולריים, השאיפה cannoלא ניתן להשתמש כדי למקם את התא על החללית. נוירונים חילזון, כמו תאים גדולים אחרים, ניתנים המיקום ידנית על גבי החללית. עבור תאים קטנים הדורשים פעמים תרבות ארוכות יותר, יש לנו חסכה מניפולציה כלשהי ולשמור על הסתברות גבוהה של קבלת החותם של פוליפפטידים דפוסים הדבקה על גבי הבדיקות להציב תאים על גבי הבדיקות, והפגינו מיקום של תאים על בדיקה 17,18. NRCC היא גם מפתחת שבב polyimide microfluidic תיקון, מלחציים 19 עם קיבול דומה לזה של זכוכית פיפטה. המטרה הסופית של הפרויקט היא מרובה בדיקות תיקון-מהדק שבב המאפשר ניטור סימולטני של פעילות אלקטרו של נוירונים מספר העוסקים בהתנהגות רשת ברזולוציה של תעלות יונים בודדים 14. שיטה זו היא שיטה ברזולוציה גבוהה משלים מרובת אלקטרודה arrays 20.

culturing and electrophysiology of cells on nrcc patch-clamp chips

בשל הרגישות המעודן שלה ואת היכולת לפקח ולשלוט תאים בודדים ברמה של תעלות יונים, תיקון, הוא מהדק את תקן הזהב של electrophysiology ליישם מודלים מחלות ומסכי התרופות כאחד 1. השיטה המסורתית כוללת בעדינות ליצור קשר סלולרי עם טפטפת זכוכית מלאה של פתרון פיזיולוגי כדי לבודד את תיקון של קרום מתחת לשיאה 2. האלקטרודה הוכנס פיפטה לוכד יונים ערוצים הפעילות תוך תיקון קרום או, כאשר מקרע, לתא כולו. בעשור האחרון, תיקון, מהדק שבבי הוצעו גם חלופה 3, 4: הסרט הושעה מפריד בינוני פיזיולוגי ממדיום תרבות, צמצם microfabricated בסרט מחליף את שיאו של טפטפת. Patch-clamp שבבי השתלבו במערכות אוטומטיות ממוסחרים לסינון תפוקה גבוהה 5. כדי incrלהקל על התפוקה, הם כוללים משלוח fluidic של תאים מן ההשעיה, המיקום שלהם על הפתח על ידי שאיבה, ואת השגרה אוטומטיות לגילוי תאים ל-בדיקה חותמות ולהיכנס למצב התא כולו. יש לנו דיווח על ייצור של שבב סיליקון תיקון, מלחציים עם עכבה אופטימיזציה צורת פתח המאפשר הקלטה באיכות גבוהה של פוטנציאל פעולה של נוירונים בתרבית 6 חלזונות, לאחרונה, דיווחנו גם התקדמות לקראת לחקור נוירונים יונקים 7. שבבי תיקון, מהדק שלנו מיוצרים על הקנדי Photonics ייצור מרכז 8, היציקה מסחרי, והם זמינים בסדרה גדולה. נשמח לקיים שיתופי פעולה עם electrophysiologists כדי לאמת את השימוש בטכנולוגיה NRCC במודלים שונים. השבבים משמשים על פי התוכנית הכללית מיוצג באיור 1: שבב סיליקון היא בחלק התחתון של בקבוקון תרבות הפרספקס האחורי של הצמצם מחובר chann תת קרקעיאל מצויד עם צינורות בכל צד של החבילה. תאים בתרבית בבקבוקון ושל התא על גבי החללית מנוטר על ידי אלקטרודה המדידה מוכנס 2 channel.The מחוץ יציאות fluidic להקל על חילופי פתרון עם הפרעה מינימלית לתא, זה יתרון לעומת בטפי להחדרת נוזלים זכוכית עבור תאיים זלוף. <img alt="איור 1" src="/files/ftp_upload/3288/3288fig1.jpg" /> באיור 1. עקרון המדידה באמצעות שבב NRCC תיקון, מהדק אנחנו כאן בפירוט את הפרוטוקולים כדי לעקר וראש צ &#39;יפס, לטעון אותם עם צלחת בינונית, אותם תאים, ולבסוף להשתמש בהם הקלטות אלקטרו.

Watch this Scientific Journal Video about Culturing and Electrophysiology of Cells on NRCC Patch-clamp Chips at JoVE.com

Culturing and Electrophysiology of Cells on NRCC Patch-clamp Chips

אנחנו מראים איך מישורי תיקון, מהדק שבבי מפוברק המועצה הלאומית למחקר של קנדה מעוקרים, דרוך, עמוסה בינונית, מצופה בתאים, ושימשו הקלטות אלקטרו.

Culturing ו Electrophysiology של תאים על Patch-clamp צ&#39;יפס NRCC

Due to its exquisite sensitivity and the ability to monitor and control individual cells at the level of ion channels, patch-clamping is the gold standard ...

culturing-and-electrophysiology-of-cells-on-nrcc-patch-clamp-chips

Research

JoVE Journal

Neuroscience

15.6K Views.  National Research Council of Canada. אנחנו מראים איך מישורי תיקון, מהדק שבבי מפוברק המועצה הלאומית למחקר של קנדה מעוקרים, דרוך, עמוסה בינונית, מצופה בתאים, ושימשו הקלטות אלקטרו.

Video: Culturing and Electrophysiology of Cells on NRCC Patch-clamp Chips

Patch Clamp Recordings in Inner Ear Hair Cells Isolated from Zebrafish

Patch clamp analyses of the voltage-gated channels in sensory hair cells isolated from a variety of species have been described previously1-4 but this video represents the first application of those techniques to hair cells from zebrafish. Here we demonstrate a method to isolate healthy, intact hair cells from all of the inner ear end-organs: saccule, lagena, utricle and semicircular canals. Further, we demonstrate the diversity in hair cell size and morphology and give an example of the kinds of patch clamp recordings that can be obtained. The advantage of the use of this zebrafish model system over others stems from the availability of zebrafish mutants that affect both hearing and balance. In combination with the use of transgenic lines and other techniques that utilize genetic analysis and manipulation, the cell isolation and electrophysiological methods introduced here should facilitate greater insight into the roles hair cells play in mediating these sensory modalities.

The purpose of this video is to demonstrate procedures for obtaining healthy, intact hair cells from the inner ear organs of adult zebrafish and then using them for patch clamp studies aimed at characterizing the biophysical properties of their voltage-gated channels.

הקלטות קלאמפ תיקון בתאי שיער באוזן פנימיים מבודדות מדג הזברה

Patch  clamp analyses of the voltage-gated channels in sensory hair cells isolated  from a variety of species have been described previously1-4 but this  ...

Whole Cell Patch Clamp for Investigating the Mechanisms of Infrared Neural Stimulation

It has been demonstrated in recent years that pulsed, infrared laser light can be used to elicit electrical responses in neural tissue, independent of any further modification of the target tissue. Infrared neural stimulation has been reported in a variety of peripheral and sensory neural tissue in vivo, with particular interest shown in stimulation of neurons in the auditory nerve. However, while INS has been shown to work in these settings, the mechanism (or mechanisms) by which infrared light causes neural excitation is currently not well understood. The protocol presented here describes a whole cell patch clamp method designed to facilitate the investigation of infrared neural stimulation in cultured primary auditory neurons. By thoroughly characterizing the response of these cells to infrared laser illumination in vitro under controlled conditions, it may be possible to gain an improved understanding of the fundamental physical and biochemical processes underlying infrared neural stimulation.

Infrared nerve stimulation has been proposed as an alternative to electrical stimulation in a range of nerve types, including those associated with the auditory system. This protocol describes a patch clamp method for studying the mechanism of infrared nerve stimulation in a culture of primary auditory neurons.

הצמד תיקון נייד לכל חוקר את המנגנונים של גירוי עצבי אינפרא אדום

It has been  demonstrated in recent years that pulsed, infrared laser light can be used to  elicit electrical responses in neural tissue, independent of ...

Isolation of Sensory Neurons of Aplysia californica for Patch Clamp Recordings of Glutamatergic Currents

The marine gastropod mollusk Aplysia californica has a venerable history as a model of nervous system function, with particular significance in studies of learning and memory. The typical preparations for such studies are ones in which the sensory and motoneurons are left intact in a minimally dissected animal, or a technically elaborate neuronal co-culture of individual sensory and motoneurons. Less common is the isolated neuronal preparation in which small clusters of nominally homogeneous neurons are dissociated into single cells in short term culture. Such isolated cells are useful for the biophysical characterization of ion currents using patch clamp techniques, and targeted modulation of these conductances. A protocol for preparing such cultures is described. The protocol takes advantage of the easily identifiable glutamatergic sensory neurons of the pleural and buccal ganglia, and describes their dissociation and minimal maintenance in culture for several days without serum.

Isolation of Sensory Neurons of Aplysia californica for Patch Clamp Recordings of Glutamatergic Currents

We describe the dissection of the nervous system of the marine sea hare Aplysia after anesthesia, the isolation of neurons for short term-tissue culture, and recordings of single cell ion currents via the patch clamp technique.

בידוד של נוירונים חושיים של<em&gt; Aplysia californica</em&gt; להקלטות מהדק תיקון של זרמי glutamatergic

The marine gastropod mollusk Aplysia californica has a venerable  history as a model of nervous system function, with particular significance in  studies ...

Patch Clamp Recordings from Embryonic Zebrafish Mauthner Cells

Mauthner cells (M-cells) are large reticulospinal neurons located in the hindbrain of teleost fish. They are key neurons involved in a characteristic behavior known as the C-start or escape response that occurs when the organism perceives a threat. The M-cell has been extensively studied in adult goldfish where it has been shown to receive a wide range of excitatory, inhibitory and neuromodulatory signals1. We have been examining M-cell activity in embryonic zebrafish in order to study aspects of synaptic development in a vertebrate preparation. In the late 1990s Ali and colleagues developed a preparation for patch clamp recording from M-cells in zebrafish embryos, in which the CNS was largely intact2,3,4. The objective at that time was to record synaptic activity from hindbrain neurons, spinal cord neurons and trunk skeletal muscle while maintaining functional synaptic connections within an intact brain-spinal cord preparation. This preparation is still used in our laboratory today. To examine the mechanisms underlying developmental synaptic plasticity, we record excitatory (AMPA and NMDA-mediated)5,6 and inhibitory (GABA and glycine) synaptic currents from developing M-cells. Importantly, this unique preparation allows us to return to the same cell (M-cell) from preparation to preparation to carefully examine synaptic plasticity and neuro-development in an embryonic organism. The benefits provided by this preparation include 1) intact, functional synaptic connections onto the M-cell, 2) relatively inexpensive preparations, 3) a large supply of readily available embryos 4) the ability to return to the same cell type (i.e. M-cell) in every preparation, so that synaptic development at the level of an individual cell can be examined from fish to fish, and 5) imaging of whole preparations due to the transparent nature of the embryos.

We have developed an intact brain-spinal cord preparation to record and monitor electrical activity via patch clamp recording from the Mauthner neurons and other reticulospinal cells in zebrafish embryos. Thus, we are able to record excitatory and inhibitory synaptic currents, voltage-gated channel activity and action potentials from key neurons in a developing embryo.

תיקון הקלטות קלאמפ מתאים עוברי דג הזברה מאוטנר

Mauthner cells (M-cells) are large  reticulospinal neurons located in the hindbrain of teleost fish. They are key  neurons involved in a characteristic ...

A Computer-assisted Multi-electrode Patch-clamp System

The patch-clamp technique is today the most well-established method for recording electrical activity from individual neurons or their subcellular compartments. Nevertheless, achieving stable recordings, even from individual cells, remains a time-consuming procedure of considerable complexity. Automation of many steps in conjunction with efficient information display can greatly assist experimentalists in performing a larger number of recordings with greater reliability and in less time. In order to achieve large-scale recordings we concluded the most efficient approach is not to fully automatize the process but to simplify the experimental steps and reduce the chances of human error while efficiently incorporating the experimenter's experience and visual feedback. With these goals in mind we developed a computer-assisted system which centralizes all the controls necessary for a multi-electrode patch-clamp experiment in a single interface, a commercially available wireless gamepad, while displaying experiment related information and guidance cues on the computer screen. Here we describe the different components of the system which allowed us to reduce the time required for achieving the recording configuration and substantially increase the chances of successfully recording large numbers of neurons simultaneously.

Multi-electrode patch-clamp recordings constitute a complex task. Here we show how, by automating of many of the experimental steps, it is possible to accelerate the process leading to qualitative improvement in performance and number of recordings.

מערכת תיקון מהדק Multi-אלקטרודה בסיוע מחשב

The patch-clamp technique is today the most  well-established method for recording electrical activity from individual  neurons or their subcellular ...

Whole-cell Patch-clamp Recordings from Morphologically- and Neurochemically-identified Hippocampal Interneurons

GABAergic inhibitory interneurons play a central role within neuronal circuits of the brain. Interneurons comprise a small subset of the neuronal population (10-20%), but show a high level of physiological, morphological, and neurochemical heterogeneity, reflecting their diverse functions. Therefore, investigation of interneurons provides important insights into the organization principles and function of neuronal circuits. This, however, requires an integrated physiological and neuroanatomical approach for the selection and identification of individual interneuron types. Whole-cell patch-clamp recording from acute brain slices of transgenic animals, expressing fluorescent proteins under the promoters of interneuron-specific markers, provides an efficient method to target and electrophysiologically characterize intrinsic and synaptic properties of specific interneuron types. Combined with intracellular dye labeling, this approach can be extended with post-hoc morphological and immunocytochemical analysis, enabling systematic identification of recorded neurons. These methods can be tailored to suit a broad range of scientific questions regarding functional properties of diverse types of cortical neurons.

Cortical networks are controlled by a small, but diverse set of inhibitory interneurons. Functional investigation of interneurons therefore requires targeted recording and rigorous identification. Described here is a combined approach involving whole-cell recordings from single or synaptically-coupled pairs of neurons with intracellular labeling, post-hoc morphological and immunocytochemical analysis.

הקלטות תיקון מהדק כל התא מMorphologically- וinterneurons היפוקמפוס זיהה Neurochemically

GABAergic inhibitory interneurons play a central role within neuronal circuits of the brain. Interneurons comprise a small subset of the neuronal ...

Whole-cell Patch-clamp Recordings in Brain Slices

Whole-cell patch-clamp recording is an electrophysiological technique that allows the study of the&#160;electrical properties of a substantial part of the neuron. In this configuration, the micropipette is in tight contact with the cell membrane, which prevents current leakage and thereby provides more accurate ionic current measurements than the previously used intracellular sharp electrode recording method. Classically, whole-cell recording can be performed on neurons in various types of preparations, including cell culture models, dissociated neurons, neurons in brain slices, and in intact anesthetized or awake animals. In summary, this technique has immensely contributed to the understanding of passive and active biophysical properties of excitable cells. A major advantage of this technique is that it provides information on how specific manipulations (e.g., pharmacological, experimenter-induced plasticity) may alter specific neuronal functions or channels in real-time. Additionally, significant opening of the plasma membrane allows the internal pipette solution to freely diffuse into the cytoplasm, providing means for introducing drugs, e.g., agonists or antagonists of specific intracellular proteins, and manipulating these targets without altering their functions in neighboring cells. This article will focus on whole-cell recording performed on neurons in brain slices,&#160;a preparation that has the advantage of recording neurons in relatively well preserved brain circuits, i.e., in a physiologically relevant context. In particular,&#160;when combined with appropriate pharmacology, this technique is a powerful tool allowing identification of specific neuroadaptations that occurred following any type of experiences, such as learning, exposure to drugs of abuse, and stress. In summary, whole-cell patch-clamp recordings in brain slices provide means to measure in ex vivo preparation long-lasting changes in neuronal functions that have developed in intact awake animals.

This protocol describes basic procedural steps for performing whole-cell patch-clamp recordings. This technique allows the study of&#160;the electrical behavior of neurons, and when performed in brain slices, allows the assessment of various neuronal functions from neurons that are still integrated in relatively well preserved brain circuits.

הקלטות תיקון מהדק כל תא פרוסות המוח

Whole-cell patch-clamp recording is an electrophysiological technique that allows the study of the&#160;electrical properties of a substantial part of the ...

Subcellular Patch-clamp Recordings from the Somatodendritic Domain of Nigral Dopamine Neurons

Dendrites of dopaminergic neurons receive and convey synaptic input, support action potential back-propagation and neurotransmitter release. Understanding these fundamental functions will shed light on the information transfer in these neurons. Dendritic patch-clamp recordings provide the possibility to directly examine the electrical properties of dendrites and underlying voltage-gated ion channels. However, these fine structures are not easily accessible to patch pipettes because of their small diameter. This report describes a step-by-step procedure to collect stable and reliable recordings from the dendrites of dopaminergic neurons in acute slices. Electrophysiological measurements are combined with post hoc recovery of cell morphology. Successful experiments rely on improved preparation of slices, solutions and pipettes, adequate adjustment of the optics and stability of the pipette in contact with the recorded structure. Standard principles of somatic patch-clamp recording are applied to dendrites but with a gentler approach of the pipette. These versatile techniques can be implemented to address various questions concerning the excitable properties of dendrites.

Subcellular patch-clamp recordings offer the possibility to investigate the functional properties of dendrites. However these fine structures are not easily accessible due to their small diameter. The protocol described here aims to facilitate the collection of stable and reliable recordings from the dendrites of dopamine neurons in slices in vitro.

הקלטות תיקון מהדק subcellular מן האחוזה Somatodendritic של נוירונים Nigral דופמין

Dendrites of dopaminergic neurons receive and convey synaptic input, support action potential back-propagation and neurotransmitter release. Understanding ...

Patch Clamp Recording of Starburst Amacrine Cells in a Flat-mount Preparation of Deafferentated Mouse Retina

The mammalian retina is a layered tissue composed of multiple neuronal types. To understand how visual signals are processed within its intricate synaptic network, electrophysiological recordings are frequently used to study connections among individual neurons. We have optimized a flat-mount preparation for patch clamp recording of genetically marked neurons in both GCL (ganglion cell layer) and INL (inner nuclear layer) of mouse retinas. Recording INL neurons in flat-mounts is favored over slices because both vertical and lateral connections are preserved in the former configuration, allowing retinal circuits with large lateral components to be studied. We have used this procedure to compare responses of mirror-partnered neurons in retinas such as the cholinergic starburst amacrine cells (SACs).

This protocol demonstrates how to perform whole-cell patch clamp recording on retinal neurons from a flat-mount preparation.

צמד תיקון הקלטה של ​​תאי הקרנות amacrine בתוך הכנת שטוח הר Deafferentated רשתית העכבר

The mammalian retina is a layered tissue composed of multiple neuronal types. To understand how visual signals are processed within its intricate synaptic ...

Whole-cell Patch-clamp Recordings for Electrophysiological Determination of Ion Selectivity in Channelrhodopsins

Over the past decade, channelrhodopsins became indispensable in neuroscientific research where they are used as tools to non-invasively manipulate electrical processes in target cells. In this context, ion selectivity of a channelrhodopsin is of particular importance. This article describes the investigation of chloride selectivity for a recently identified anion-conducting channelrhodopsin of Proteomonas sulcata via electrophysiological patch-clamp recordings on HEK293 cells. The experimental procedure for measuring light-gated photocurrents demands a fast switchable &#8211; ideally monochromatic &#8211; light source coupled into the microscope of an otherwise conventional patch-clamp setup. Preparative procedures prior to the experiment are outlined involving preparation of buffered solutions, considerations on liquid junction potentials, seeding and transfection of cells, and pulling of patch pipettes. The actual recording of current-voltage relations to determine the reversal potentials for different chloride concentrations takes place 24 h to 48 h after transfection. Finally, electrophysiological data are analyzed with respect to theoretical considerations of chloride conduction.

This article describes how the ion selectivity of channelrhodopsin is determined with electrophysiological whole-cell patch-clamp recordings using HEK293 cells. Here, the experimental procedure for investigating chloride selectivity of an anion-selective channelrhodopsin is demonstrated. However, the procedure is transferable to other channelrhodopsins of distinct selectivity.

Culturing ו Electrophysiology של תאים על Patch-clamp צ'יפס NRCC

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Chapters in this video

הקלטות קלאמפ תיקון בתאי שיער באוזן פנימיים מבודדות מדג הזברה

הצמד תיקון נייד לכל חוקר את המנגנונים של גירוי עצבי אינפרא אדום

בידוד של נוירונים חושיים של

תיקון הקלטות קלאמפ מתאים עוברי דג הזברה מאוטנר

מערכת תיקון מהדק Multi-אלקטרודה בסיוע מחשב

הקלטות תיקון מהדק כל התא מMorphologically- וinterneurons היפוקמפוס זיהה Neurochemically

הקלטות תיקון מהדק כל תא פרוסות המוח

הקלטות תיקון מהדק subcellular מן האחוזה Somatodendritic של נוירונים Nigral דופמין

צמד תיקון הקלטה של תאי הקרנות amacrine בתוך הכנת שטוח הר Deafferentated רשתית העכבר

תא שלם תיקון מהדק הקלטות עבור קביעת electrophysiological של יון סלקטיביות ב Channelrhodopsins

Culturing ו Electrophysiology של תאים על Patch-clamp צ'יפס NRCC

Summary

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Chapters in this video

הקלטות קלאמפ תיקון בתאי שיער באוזן פנימיים מבודדות מדג הזברה

הצמד תיקון נייד לכל חוקר את המנגנונים של גירוי עצבי אינפרא אדום

בידוד של נוירונים חושיים של

תיקון הקלטות קלאמפ מתאים עוברי דג הזברה מאוטנר

מערכת תיקון מהדק Multi-אלקטרודה בסיוע מחשב

הקלטות תיקון מהדק כל התא מMorphologically- וinterneurons היפוקמפוס זיהה Neurochemically

הקלטות תיקון מהדק כל תא פרוסות המוח

הקלטות תיקון מהדק subcellular מן האחוזה Somatodendritic של נוירונים Nigral דופמין

צמד תיקון הקלטה של ​​תאי הקרנות amacrine בתוך הכנת שטוח הר Deafferentated רשתית העכבר

תא שלם תיקון מהדק הקלטות עבור קביעת electrophysiological של יון סלקטיביות ב Channelrhodopsins

צמד תיקון הקלטה של תאי הקרנות amacrine בתוך הכנת שטוח הר Deafferentated רשתית העכבר