המחקר הנוכחי נתמך על ידי צ&#39;ארלס ריבר.

<ol>
	<li>Jacobson, R. H., 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=Principles+of+validation+of+diagnostic+assays+for+infectious+diseases.">Principles of validation of diagnostic assays for infectious diseases.</a> Manual of Standards for Diagnostic Tests and Vaccines. , 8-15 (1996).</li><li>Wright, P. F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=International+standards+for+test+methods+and+reference+sera+for+diagnostic+tests+for+antibody+detection.">International standards for test methods and reference sera for diagnostic tests for antibody detection.</a> Rev. sci. tech. Off. int. Epiz. 17 (2), 527-533 (1998).</li><li>Pepe, M. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> The Statistical Evaluation of Medical Tests for Classification and Prediction. , (2003).</li><li>Barr, M. C., 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=Comparison+and+interpretation+of+diagnostic+tests+for+feline+immunodeficiency+virus+infection.">Comparison and interpretation of diagnostic tests for feline immunodeficiency virus infection.</a> J. Am. Vet. Med. Assoc. 199, 1377-1381 (1991).</li></ol>

כל עבודת המחברים לצ&#39;ארלס ריבר RADS, ספקית גדולה של שירותי בעלי חי סרולוגיה בדיקות וחומרים כימיים.

תהליך בדיקת MFIA הוא יעיל ביותר, ודורש פחות ציוד ומדגם קטן יותר ומגיב יותר מכרכי בדיקות singleplex מסורתיות. הפונקציונליות של המערכת זמנית נותנת למשתמש את הגמישות למסך בו זמנית לזנים מרובים או זנים של סוכנים נפוצים במכרסמי מעבדה (קורונה כלומר, parvoviruses וכו &#39;). זה גם מאפשר לנו, לעצב פנלי חרוזים מותאמים אישית המבוססים על תחומי העניין (משפחת הווירוס ספציפי אני.) וניתן להתאמה לסוגי ההקרנה אחרים של ביומולקולות כולל ציטוקינים וסמנים ביולוגיים אחרים. בנוסף, היא מאפשרת לנו לשלב כמה מבחני בקרה פנימיים כדי לוודא מדגם והתאמת מערכת ובכך להבטיח את הדיוק של תוצאות. אלה כוללים שליטת רקמות ואימונוגלובולינים IgG נגד מבחן סרום מינים (αIg) ערכות חרוזים מצופות להעריך התאמתו מדגם. רקמת שליטת חרוז מזהה מחייב הלא ספציפי של אימונוגלובולינים סרום ושליטת αIg החרוז מאשרסרום שנוסף לו ומכיל ריכוז נוגדנים מספק. שליטת חרוז אחר, מצופה באימונוגלובולינים מיני סרום, מוכיח כי החומרים כימיים שכותרתו וקורא assay מתפקדים כראוי. מבחנים אחרים זמינים מסחרי זמנית בפורמט סרולוגיות (microarrays ie., ImmunoComb) לא יכולים להציע רמה זו של אישור תוצאה. היכולת לצמצם את המקור האפשרי לכישלון בדיקה לפני הבדיקה חוזרת יכולה לעזור חוקר לחסוך בזמן וחומרים. היבטים קריטיים של MFIA צריכים להיות מאושרים לפני חזרה מדגם נכשל. מאז הבדיקה מתבצעת בטמפרטורת סביבתו יש לוודא כי טמפרטורת המעבדה היא כ 27 ° C ± 2 מעלות צלזיוס, טמפרטורות גבוהות יותר יכולות להוביל לציונים נמוכים מצפויים לפקדים ודגימות. כביסה היא אולי השלב הקריטי ביותר בבדיקה. הם מבטיחים שצלחת המבחן היא שטפה כראוי, ומחק resuspended יכול לחסלהרוב המכריע של טעויות דגימה עקב ספירה נמוכה של חרוז (עקב חרוזים צבורים) או בנוסף מגיב מספיק (אבד ידי פתילה מתחתית מסנן צלחת בדיקה). אנו שגרתי לספור 25 חרוזים לבדיקה (סוכן) ולא מצאנו כל הבדל סטטיסטי בתוצאות על ידי ספירת מספר גבוה יותר של חרוזים שגם יובילו לזמן לקרוא עוד על הצלחת. יש לנו מחקרים שבוצעו אימות מקיפות של MFIA בכמה מינים של חיות מעבדה בשימוש נפוץ (עכבר, חולדה, אוגר, קביה וארנב) להפגין דיוק אבחון, שחזור, וקשיחות על ידי בדיקת מספר גדול של דגימות ידועות חיוביות ושליליות בסרום, ו השוואתם ELISA, תוצאות MFIA IFA ו. את מגבלות זיהוי (כלומר, נקודתי קצה טיטרציה רגילות חיסוניות סרום) של MFIA היו דומות ל, ובמקרים מסוימים עלו, אלה של ELISA המקביל. סגולי לאבחון, למדידה עם SPF מכרסם סרה, עלה 99%; betwee ההתכתבות הכלליתn ELISA וMFIA בוצעו על סרום ידוע חיובי ושלילי ידוע היו גדול יותר מאשר 95%. לסיכום, תוצאות המחקר הוכיחו כי MFIA זמנית היא חלופי טוב singleplex ELISA, והוא מתאים לשימוש, כלומר המיועד שלו בserosurveillance השגרתי של מושבות בעלי חיים במעבדה.

multiplexed fluorometric immunoassay testing methodology and troubleshooting

כדי להבטיח את האיכות של מודלים של בעלי חיים המשמשים במחקר ביו פתחנו מספר האסטרטגיות ושיטות אבחון בדיקות כדי לקבוע אם בעלי חיים שנחשפו לחומרים מזהמים adventitious (וירוסים, Mycoplasma ומיקרואורגניזמים אנינים אחרים). זיהומים של מערכת חיסון בעלי חיים הם בדרך כלל חולפים, עדיין תגובות נוגדנים בסרום לזיהום לעתים קרובות ניתן להבחין בתוך ימים עד שבועות ונמשכים לכל אורך החיים של המארח. סרולוגיה היא מתודולוגיה האבחון הראשונית שבאמצעותו חיות מעבדה נמצאות תחת פיקוח. מבחינה הסטורית assay immunosorbent אנזים הצמוד העקיף (ELISA) כבר שיטת ההקרנה העיקרית לserosurveillance. ELISA מתבצעת כsingleplex, שבתגובת מיקרוביאלי 1 אנטיגן נוגדן נמדדת לטוב. בהשוואת MFIA מבוצע כבדיקת multiplexed. מאז microspheres לבוא ב100 ערכות צבעים שונות, רבים כמו 100 מבחנים שונים ניתן לבצע simultaneously בmicroplate האחת טוב. חידוש זה מקטין את הכמות בסרום, ריאגנטים ומתכלה הנדרשים לבדיקה שגרתית, תוך הגדלת כמות המידע המתקבל מבדיקה אחת טובה. בנוסף, אנו מסוגלים לשלב חרוזי בקרה פנימיים מרובים כדי לוודא מדגם והתאמת מערכת ובכך להבטיח את הדיוק של תוצאות. אלה כוללים שליטת רקמות ואימונוגלובולינים IgG נגד מבחן סרום מינים (αIg) ערכות חרוזים מצופות להעריך התאמתו מדגם. כמו בELISA וIFA, שליטת הרקמה מזהה מחייב הלא ספציפי של אימונוגלובולינים בסרום. שליטת αIg (שליטת סרום) מאשרת כי סרום כבר הוסיף ומכילה ריכוז נוגדני IgG מספיק תוך שליטת החרוז (שליטת התאמת מערכת), מצופה באימונוגלובולינים מיני סרום, מוכיח כי החומרים כימיים שהכותרת וLuminex הקורא מתפקדים כראוי.

Watch this Scientific Journal Video about Multiplexed Fluorometric ImmunoAssay Testing Methodology and Troubleshooting at JoVE.com

Multiplexed Fluorometric ImmunoAssay Testing Methodology and Troubleshooting

שימוש בטכנולוגית microsphere Xmap של Luminex החברה, פתחתי immunoassay Fluorometric Multiplexed (MFIA) לserosurveillance של מיני בעלי חיים שונים במעבדה. MFIA הוא microarray השעיה בי אנטיגן, בקרת רקמה או נוגדנים קשורות קוולנטית לקלקר microspheres צבעים. שיטת בדיקת MFIA כמו גם נושאים שונים לפתרון בעיות מטופלות.

מתודולוגיה multiplexed Fluorometric immunoassay בדיקה ופתרון בעיות

To ensure the quality of animal models used in biomedical research we have developed a number of diagnostic testing strategies and methods to determine if ...

multiplexed-fluorometric-immunoassay-testing-methodology

Nanyang Technological University

Research

JoVE Journal

Biology

28.3K Views.  Charles River. שימוש בטכנולוגית microsphere Xmap של Luminex החברה, פתחתי immunoassay Fluorometric Multiplexed (MFIA) לserosurveillance של מיני בעלי חיים שונים במעבדה. MFIA הוא microarray השעיה בי אנטיגן, בקרת רקמה או נוגדנים קשורות קוולנטית לקלקר microspheres צבעים. שיטת בדיקת MFIA כמו גם נושאים שונים לפתרון בעיות מטופלות.

Video: Multiplexed Fluorometric ImmunoAssay Testing Methodology and Troubleshooting

Testing Visual Sensitivity to the Speed and Direction of Motion in Lizards

Testing visual sensitivity in any species provides basic information regarding behaviour, evolution, and ecology. However, testing specific features of the visual system provide more empirical evidence for functional applications. Investigation into the sensory system provides information about the sensory capacity, learning and memory ability, and establishes known baseline behaviour in which to gauge deviations (Burghardt, 1977). However, unlike mammalian or avian systems, testing for learning and memory in a reptile species is difficult. Furthermore, using an operant paradigm as a psychophysical measure of sensory ability is likewise as difficult. Historically, reptilian species have responded poorly to conditioning trials because of issues related to motivation, physiology, metabolism, and basic biological characteristics. Here, I demonstrate an operant paradigm used a novel model lizard species, the Jacky dragon (Amphibolurus muricatus) and describe how to test peripheral sensitivity to salient speed and motion characteristics. This method uses an innovative approach to assessing learning and sensory capacity in lizards. I employ the use of random-dot kinematograms (RDKs) to measure sensitivity to speed, and manipulate the level of signal strength by changing the proportion of dots moving in a coherent direction. RDKs do not represent a biologically meaningful stimulus, engages the visual system, and is a classic psychophysical tool used to measure sensitivity in humans and other animals. Here, RDKs are displayed to lizards using three video playback systems. Lizards are to select the direction (left or right) in which they perceive dots to be moving. Selection of the appropriate direction is reinforced by biologically important prey stimuli, simulated by computer-animated invertebrates.

Testing visual sensitivity in lizards using an operant conditioning paradigm that employs video playback of random-dot kinematograms and computer-generated invertebrates.

בדיקת רגישות חזותית על מהירות ועל כיוון התנועה של לטאות

Testing visual sensitivity in any species provides basic information regarding behaviour, evolution, and ecology. However, testing specific features of ...

Olfactory Behavioral Testing in the Adult Mouse

The rodent olfactory system is of increasing interest to scientists, studied, in part, in systems biology because of its stereotyped, yet accessible circuitry. In addition, this area's unique ability to generate new neurons throughout an organism's lifetime makes it an attractive system for developmental and regenerative biologists alike. Such interest necessitates a means for a quick, yet reliable assessment of olfactory function. Many tests of olfactory ability are complex, variable or not specifically designed for mice. Also, some tests are sensitive to memory deficits as well as defects in olfactory abilities, confounding obtained results.
Here, we describe a simple battery of tests designed to identify defects in olfactory sensitivity and preference. First, an initial general health assessment allows for the identification of animals suitable for further testing. Second, mice are exposed to various dilutions of scents to ascertain whether there is a threshold difference. Third, mice are presented with various scents, both attractive and aversive, that allow for the assessment of olfactory preference. These simple studies should make the initial characterization of olfactory behavior accessible for labs of varied resources and expertise.

Fundamental, yet unique properties of the rodent olfactory system have led to its increasing study among biologists. A relatively simple assessment of its function is then also needed. Here we describe sensitive tests for the characterization of mouse olfactory sensitivity and preference.

בדיקה התנהגותית חוש הריח של העכבר למבוגרים

The rodent olfactory system is of increasing interest to scientists, studied, in part, in systems biology because of its stereotyped, yet accessible ...

Induction and Testing of Hypoxia in Cell Culture

Hypoxia is defined as the reduction or lack of oxygen in organs, tissues, or cells. This decrease of oxygen tension can be due to a reduced supply in oxygen (causes include insufficient blood vessel network, defective blood vessel, and anemia) or to an increased consumption of oxygen relative to the supply (caused by a sudden higher cell proliferation rate). Hypoxia can be physiologic or pathologic such as in solid cancers 1-3, rheumatoid arthritis, atherosclerosis etc&#x2026; Each tissues and cells have a different ability to adapt to this new condition. During hypoxia, hypoxia inducible factor alpha (HIF) is stabilized and regulates various genes such as those involved in angiogenesis or transport of oxygen 4. The stabilization of this protein is a hallmark of hypoxia, therefore detecting HIF is routinely used to screen for hypoxia 5-7. 
In this article, we propose two simple methods to induce hypoxia in mammalian cell cultures and simple tests to evaluate the hypoxic status of these cells.

Here we propose simple methods to induce hypoxia in cell cultures and simple tests to evaluate the hypoxic status of the cultures.

אינדוקציה ובדיקה של היפוקסיה בתרבות התא

Hypoxia is defined as the reduction or lack of oxygen in organs, tissues, or cells.  This decrease of oxygen tension can be due to a reduced supply in ...

Polymerase Chain Reaction: Basic Protocol Plus Troubleshooting and Optimization Strategies

In the biological sciences there have been technological advances that catapult the discipline into golden ages of discovery. For example, the field of microbiology was transformed with the advent of Anton van Leeuwenhoek&#39;s microscope, which allowed scientists to visualize prokaryotes for the first time. The development of the polymerase chain reaction (PCR) is one of those innovations that changed the course of molecular science with its impact spanning countless subdisciplines in biology. The theoretical process was outlined by Keppe and coworkers in 1971; however, it was another 14 years until the complete PCR procedure was described and experimentally applied by Kary Mullis while at Cetus Corporation in 1985. Automation and refinement of this technique progressed with the introduction of a thermal stable DNA polymerase from the bacterium Thermus aquaticus, consequently the name Taq DNA polymerase.
PCR is a powerful amplification technique that can generate an ample supply of a specific segment of DNA (i.e., an amplicon) from only a small amount of starting material (i.e., DNA template or target sequence). While straightforward and generally trouble-free, there are pitfalls that complicate the reaction producing spurious results. When PCR fails it can lead to many non-specific DNA products of varying sizes that appear as a ladder or smear of bands on agarose gels. Sometimes no products form at all. Another potential problem occurs when mutations are unintentionally introduced in the amplicons, resulting in a heterogeneous population of PCR products. PCR failures can become frustrating unless patience and careful troubleshooting are employed to sort out and solve the problem(s). This protocol outlines the basic principles of PCR, provides a methodology that will result in amplification of most target sequences, and presents strategies for optimizing a reaction. By following this PCR guide, students should be able to: 
 
&#9679; Set up reactions and thermal cycling conditions for a conventional PCR experiment 
&#9679; Understand the function of various reaction components and their overall effect on a PCR experiment 
&#9679; Design and optimize a PCR experiment for any DNA template 
&#9679; Troubleshoot failed PCR experiments

PCR has emerged as a common technique in many molecular biology laboratories. Provided here is a quick guide to several conventional PCR protocols. Because each reaction is a unique experiment, optimal conditions required to generate a product vary. Understanding the variables in a reaction will greatly enhance troubleshooting efficiency, thereby increasing the chance to obtain the desired result.

תגובת שרשרת פולימרז: פרוטוקול בסיסי פלוס אסטרטגיות לפתרון בעיות ואופטימיזציה

In the biological sciences there have been technological advances that catapult the discipline into golden ages of discovery. For example, the field of ...

Solid Phase Synthesis of a Functionalized Bis-Peptide Using "Safety Catch" Methodology

In 1962, R.B. Merrifield published the first procedure using solid-phase peptide synthesis as a novel route to efficiently synthesize peptides. This technique quickly proved advantageous over its solution-phase predecessor in both time and labor. Improvements concerning the nature of solid support, the protecting groups employed and the coupling methods employed over the last five decades have only increased the usefulness of Merrifield's original system. Today, use of a Boc-based protection and base/nucleophile cleavable resin strategy or Fmoc-based protection and acidic cleavable resin strategy, pioneered by R.C. Sheppard, are most commonly used for the synthesis of peptides1.
Inspired by Merrifield's solid supported strategy, we have developed a Boc/tert-butyl solid-phase synthesis strategy for the assembly of functionalized bis-peptides2, which is described herein. The use of solid-phase synthesis compared to solution-phase methodology is not only advantageous in both time and labor as described by Merrifield1, but also allows greater ease in the synthesis of bis-peptide libraries. The synthesis that we demonstrate here incorporates a final cleavage stage that uses a two-step "safety catch" mechanism to release the functionalized bis-peptide from the resin by diketopiperazine formation.
Bis-peptides are rigid, spiro-ladder oligomers of bis-amino acids that are able to position functionality in a predictable and designable way, controlled by the type and stereochemistry of the monomeric units and the connectivity between each monomer. Each bis-amino acid is a stereochemically pure, cyclic scaffold that contains two amino acids (a carboxylic acid with an &alpha;-amine)3,4. Our laboratory is currently investigating the potential of functional bis-peptides across a wide variety of fields including catalysis, protein-protein interactions and nanomaterials.

The efficient solid-phase peptide synthesis of a functionalized bis-peptide trimer utilizing a "safety catch" cleavage procedure from HMBA resin is described.

סינתזה שלב מוצק של פפטיד Bis פונקציונליות שימוש &quot;בטיחות תפוס&quot; מתודולוגיה

In 1962, R.B. Merrifield published the first procedure using solid-phase peptide synthesis as a novel route to efficiently synthesize peptides. This ...

Design and Use of Multiplexed Chemostat Arrays

Chemostats are continuous culture systems in which cells are grown in a tightly controlled, chemically constant environment where culture density is constrained by limiting specific nutrients.1,2 Data from chemostats are highly reproducible for the measurement of quantitative phenotypes as they provide a constant growth rate and environment at steady state. For these reasons, chemostats have become useful tools for fine-scale characterization of physiology through analysis of gene expression3-6 and other characteristics of cultures at steady-state equilibrium.7 Long-term experiments in chemostats can highlight specific trajectories that microbial populations adopt during adaptive evolution in a controlled environment. In fact, chemostats have been used for experimental evolution since their invention.8 A common result in evolution experiments is for each biological replicate to acquire a unique repertoire of mutations.9-13 This diversity suggests that there is much left to be discovered by performing evolution experiments with far greater throughput. 
We present here the design and operation of a relatively simple, low cost array of miniature chemostats&mdash;or ministats&mdash;and validate their use in determination of physiology and in evolution experiments with yeast. This approach entails growth of tens of chemostats run off a single multiplexed peristaltic pump. The cultures are maintained at a 20 ml working volume, which is practical for a variety of applications. It is our hope that increasing throughput, decreasing expense, and providing detailed building and operation instructions may also motivate research and industrial application of this design as a general platform for functionally characterizing large numbers of strains, species, and growth parameters, as well as genetic or drug libraries.

We developed and validated a small-footprint array of miniature chemostats built from readily available parts for low cost. Physiological and experimental evolution results were similar to larger volume chemostats. The ministat array provides a compact, inexpensive, and accessible platform for traditional chemostat experiments, functional genomics, and chemical screening applications.

עיצוב ושימוש במערכי Chemostat Multiplexed

Chemostats are continuous culture systems in which cells are grown in a tightly controlled, chemically constant environment where culture density is ...

A Guide to Modern Quantitative Fluorescent Western Blotting with Troubleshooting Strategies

The late 1970s saw the first publicly reported use of the western blot, a technique for assessing the presence and relative abundance of specific proteins within complex biological samples. Since then, western blotting methodology has become a common component of the molecular biologists experimental repertoire. A cursory search of PubMed using the term &#8220;western blot&#8221; suggests that in excess of two hundred and twenty thousand published manuscripts have made use of this technique by the year 2014. Importantly, the last ten years have seen technical imaging advances coupled with the development of sensitive fluorescent labels which have improved sensitivity and yielded even greater ranges of linear detection. The result is a now truly Quantifiable Fluorescence based Western Blot (QFWB) that allows biologists to carry out comparative expression analysis with greater sensitivity and accuracy than ever before. Many &#8220;optimized&#8221; western blotting methodologies exist and are utilized in different laboratories. These often prove difficult to implement due to the requirement of subtle but undocumented procedural amendments. This protocol provides a comprehensive description of an established and robust QFWB method, complete with troubleshooting strategies.

The advancement of western blotting using fluorescence has allowed detection of subtle changes in protein expression enabling quantitative analyses. Here we describe a robust methodology for detection of a range of proteins across a variety of species and tissue types. A strategy to overcome common technical problems is also provided.

מדריך למודרני כמותי פלורסנט המערבי סופג עם אסטרטגיות לפתרון בעיות

The late 1970s saw the first publicly reported use of the western blot, a technique for assessing the presence and relative abundance of specific proteins ...

Genetic Barcoding with Fluorescent Proteins for Multiplexed Applications

Fluorescent proteins, fluorescent dyes and fluorophores in general have revolutionized the field of molecular cell biology. In particular, the discovery of fluorescent proteins and their genes have enabled the engineering of protein fusions for localization, the analysis of transcriptional activation and translation of proteins of interest, or the general tracking of individual cells and cell populations. The use of fluorescent protein genes in combination with retroviral technology has further allowed the expression of these proteins in mammalian cells in a stable and reliable manner. Shown here is how one can utilize these genes to give cells within a population of cells their own biosignature. As the biosignature is achieved with retroviral technology, cells are barcoded &#180;indefinitely&#180;. As such, they can be individually tracked within a mixture of barcoded cells and utilized in more complex biological applications. The tracking of distinct populations in a mixture of cells is ideal for multiplexed applications such as discovery of drugs against a multitude of targets or the activation profile of different promoters. The protocol describes how to elegantly develop and amplify barcoded mammalian cells with distinct genetic fluorescent markers, and how to use several markers at once or one marker at different intensities. Finally, the protocol describes how the cells can be further utilized in combination with cell-based assays to increase the power of analysis through multiplexing.

Since the discovery of the green fluorescent protein gene, fluorescent proteins have impacted molecular cell biology. This protocol describes how expression of distinct fluorescent proteins through genetic engineering is used for barcoding individual cells. The procedure enables tracking distinct populations in a cell mixture, which is ideal for multiplexed applications.

Barcoding הגנטי עם חלבונים ניאון עבור יישומי Multiplexed

Fluorescent proteins, fluorescent dyes and fluorophores in general have revolutionized the field of molecular cell biology. In particular, the discovery ...

Quantitation of Protein Expression and Co-localization Using Multiplexed Immuno-histochemical Staining and Multispectral Imaging

Immunohistochemistry is a commonly used clinical and research lab detection technique for investigating protein expression and localization within tissues. Many semi-quantitative systems have been developed for scoring expression using immunohistochemistry, but inherent subjectivity limits reproducibility and accuracy of results. Furthermore, the investigation of spatially overlapping biomarkers such as nuclear transcription factors is difficult with current immunohistochemistry techniques. We have developed and optimized a system for simultaneous investigation of multiple proteins using high throughput methods of multiplexed immunohistochemistry and multispectral imaging. Multiplexed immunohistochemistry is performed by sequential application of primary antibodies with secondary antibodies conjugated to horseradish peroxidase or alkaline phosphatase. Different chromogens are used to detect each protein of interest. Stained slides are loaded into an automated slide scanner and a protocol is created for automated image acquisition. A spectral library is created by staining a set of slides with a single chromogen on each. A subset of representative stained images are imported into multispectral imaging software and an algorithm for distinguishing tissue type is created by defining tissue compartments on images. Subcellular compartments are segmented by using hematoxylin counterstain and adjusting the intrinsic algorithm. Thresholding is applied to determine positivity and protein co-localization. The final algorithm is then applied to the entire set of tissues. Resulting data allows the user to evaluate protein expression based on tissue type (ex. epithelia vs. stroma) and subcellular compartment (nucleus vs. cytoplasm vs. plasma membrane). Co-localization analysis allows for investigation of double-positive, double-negative, and single-positive cell types. Combining multispectral imaging with multiplexed immunohistochemistry and automated image acquisition is an objective, high-throughput method for investigation of biomarkers within tissues.

Immunohistochemistry is a powerful lab technique for evaluating protein localization and expression within tissues. Current semi-automated methods for quantitation introduce subjectivity and often create irreproducible results. Herein, we describe methods for multiplexed immunohistochemistry and objective quantitation of protein expression and co-localization using multispectral imaging.

כימות של ביטוי חלבון ו Co-לוקליזציה שימוש חיסונית-histochemical Multiplexed מכתים והדמיה Multispectral

Immunohistochemistry is a commonly used clinical and research lab detection technique for investigating protein expression and localization within ...

Procedure and Key Optimization Strategies for an Automated Capillary Electrophoretic-based Immunoassay Method

New technologies that utilize capillary-based immunoassays promise faster and more quantitative protein assessment compared to traditional immunoassays. However, similar to other antibody-based protein assays, optimization of capillary-based immunoassay parameters, such as protein concentration, antibody dilution, and exposure time is an important prerequisite to the generation of meaningful and reliable data. Measurements must fall within the linear range of the assay where changes in signal are directly proportional to changes in lysate concentration. The process of choosing appropriate lysate concentrations, antibody dilutions, and exposure times in the human bronchial epithelial cell line, BEAS-2B, is demonstrated here. Assay linearity is shown over a range of whole cell extract protein concentrations with p53 and &#945;-tubulin antibodies. An example of signal burnout is seen at the highest concentrations with long exposure times, and an &#945;-tubulin antibody dilution curve is shown demonstrating saturation. In addition, example experimental results are reported for doxorubicin-treated cells using optimized parameters.

A capillary-based immunoassay using a commercial platform to measure target proteins from total protein preparations is demonstrated. In addition, assay parameters of exposure time, protein concentration, and antibody dilution are optimized for a cell culture model system.

הליך ואסטרטגיות אופטימיזציה מפתח שיטה אוטומטית נימי מתכלה מבוסס על Electrophoretic

New technologies that utilize capillary-based immunoassays promise faster and more quantitative protein assessment compared to traditional immunoassays. ...