Summary

Количественные оценки миграции клеток в Phagokinetic анализа подвижности трек

Published: December 04, 2012
doi:

Summary

Phagokinetic анализа трек подвижности является метод, используемый для оценки движения клеток. В частности, анализ мер хемокинез (случайный подвижность клеток) с течением времени в количественном выражении. Анализ использует способность клеток для создания измеримых отслеживать их движение на коллоидное золото покрытием покровные.

Abstract

Cellular motility is an important biological process for both unicellular and multicellular organisms. It is essential for movement of unicellular organisms towards a source of nutrients or away from unsuitable conditions, as well as in multicellular organisms for tissue development, immune surveillance and wound healing, just to mention a few roles1,2,3. Deregulation of this process can lead to serious neurological, cardiovascular and immunological diseases, as well as exacerbated tumor formation and spread4,5. Molecularly, actin polymerization and receptor recycling have been shown to play important roles in creating cellular extensions (lamellipodia), that drive the forward movement of the cell6,7,8. However, many biological questions about cell migration remain unanswered.

The central role for cellular motility in human health and disease underlines the importance of understanding the specific mechanisms involved in this process and makes accurate methods for evaluating cell motility particularly important. Microscopes are usually used to visualize the movement of cells. However, cells move rather slowly, making the quantitative measurement of cell migration a resource-consuming process requiring expensive cameras and software to create quantitative time-lapsed movies of motile cells. Therefore, the ability to perform a quantitative measurement of cell migration that is cost-effective, non-laborious, and that utilizes common laboratory equipment is a great need for many researchers.

The phagokinetic track motility assay utilizes the ability of a moving cell to clear gold particles from its path to create a measurable track on a colloidal gold-coated glass coverslip9,10. With the use of freely available software, multiple tracks can be evaluated for each treatment to accomplish statistical requirements. The assay can be utilized to assess motility of many cell types, such as cancer cells11,12, fibroblasts9, neutrophils13, skeletal muscle cells14, keratinocytes15, trophoblasts16, endothelial cells17, and monocytes10,18-22. The protocol involves the creation of slides coated with gold nanoparticles (Au°) that are generated by a reduction of chloroauric acid (Au3+) by sodium citrate. This method was developed by Turkevich et al. in 195123 and then improved in the 1970s by Frens et al.24,25. As a result of this chemical reduction step, gold particles (10-20 nm in diameter) precipitate from the reaction mixture and can be applied to glass coverslips, which are then ready for use in cellular migration analyses9,26,27.

In general, the phagokinetic track motility assay is a quick, quantitative and easy measure of cellular motility. In addition, it can be utilized as a simple high-throughput assay, for use with cell types that are not amenable to time-lapsed imaging, as well as other uses depending on the needs of the researcher. Together, the ability to quantitatively measure cellular motility of multiple cell types without the need for expensive microscopes and software, along with the use of common laboratory equipment and chemicals, make the phagokinetic track motility assay a solid choice for scientists with an interest in understanding cellular motility.

Protocol

1. Подготовка желатин покрытием Покровные Место кислотно-промытый покровные стекла (15 мм в диаметре) в стерильный пластиковый 100 мм блюдо (а). Поместите 8-9 покровных на блюдо и убедиться, что они не соприкасаются друг с другом или сторон блюдо .. Примечание:</stron…

Representative Results

Показанный пример фотографии, сделанные под световым микроскопом показывает трек область очищена одна ячейка (моноцитов из наших экспериментах показано на рисунке 2). Non-подвижных клеток создают характерный небольшие, овальной или круг формы участки вокруг себя указывает на ?…

Discussion

Phagokinetic анализа подвижности дорожки представленные в этой статье является простой и очень эффективный метод для количественного анализа миграции клеток. Потому что несколько типов клеток могут быть проанализированы 9-17, этот метод имеет потенциал широкого использования несколь…

Divulgazioni

The authors have nothing to disclose.

Acknowledgements

Эта работа была поддержана грантами от Национального института здоровья (AI050677, HD-051998, и GM103433), Малкольм Feist сердечно-сосудистых исследований в общении и Американской ассоциации сердца predoctoral стипендий (10PRE4200007).

Materials

Name of the reagent Company Catalog number Comments
Glass Coverslips (15 mm) Fisher Scientific 12-545-83  
Gelatin 300 Bloom Sigma-Aldrich G-1890  
Tetrachloroauric Acid Trihydrate Fisher Chemical G54-1 14.5 mM (a final working solution)
Sodium Citrate Fisher Scientific BP327-500 0.5% (a final working solution)
Paraformaldehyde Fisher Scientific O4042 3% (a final working solution)
100 mm Tissue Culture Dish Sarstedt 83.1802  
12-Well Plates Fisher Scientific 08-772-29  
24-Well Plates Fisher Scientific 07-200-84  
Techne Oven Hybridiser HB-1D LabPlanet 2040500 The standard laboratory oven will suffice
10 ml Serological Pipettes Sarstedt 86.1254.001  
Pipet-Aid Filler/Dispenser Drummond 13-681-15  
P200 Single-Channel Manual Pipette Rainin PR-200  
200 ml Barrier Tips CLP BT200  
ImageJ software http://rsb.info.nih.gov/ij/   License: Public Domain
Nikon Eclipse TE300 with a photometrics CoolSNAPfx monochrome 12-bit CCD camera Nikon   Discontinued; The most comparable specification has Nikon Eclipse Ti, but a lower end Nikon 80i will be suitable as well. Other brands also provide comparable microscopes.
      Note: The reagents and equipment listed below have been utilized by us in our various studies. Other supplies, suppliers, reagents, and equipment can be used, as long as they have similar specifications.

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Citazione di questo articolo
Nogalski, M. T., Chan, G. C., Stevenson, E. V., Collins-McMillen, D. K., Yurochko, A. D. A Quantitative Evaluation of Cell Migration by the Phagokinetic Track Motility Assay. J. Vis. Exp. (70), e4165, doi:10.3791/4165 (2012).

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