Preparación y mantenimiento de las neuronas dorsales ganglios de raíz en las culturas con compartimientos

Biology

Your institution must subscribe to JoVE's Biology section to access this content.

Fill out the form below to receive a free trial or learn more about access:

Welcome!

Enter your email below to get your free 10 minute trial to JoVE!





By clicking "Submit", you agree to our policies.

 

Summary

A continuación se describe la técnica de preparación y mantenimiento de cámaras de compartimentos de las neuronas sensoriales de cultivo de los ganglios de la raíz dorsal.

Cite this Article

Copy Citation | Download Citations

F. Pazyra-Murphy, M., A. Segal, R. Preparation and Maintenance of Dorsal Root Ganglia Neurons in Compartmented Cultures. J. Vis. Exp. (20), e951, doi:10.3791/951 (2008).

Please note that all translations are automatically generated.

Click here for the english version. For other languages click here.

Abstract

Las neuronas se extienden axones que están muy lejos del cuerpo celular para inervar los tejidos diana, donde objetivo de factores de crecimiento derivados son necesarios para la supervivencia neuronal y la función. Las neurotrofinas son especialmente necesarias para mantener la supervivencia y la diferenciación de las neuronas sensoriales que inervan pero la pregunta de cómo estas neurotrofinas derivadas de objetivos comunicar al cuerpo celular de las neuronas que inervan ha sido un área de investigación activa por más de 30 años. El modelo más comúnmente aceptada de cómo las señales de neurotrofinas llegar al cuerpo de la célula se propone que la señalización endosomas llevar a esta señal de forma retrógrada a lo largo del axón. A fin de estudiar el transporte retrógrado, un sistema de cultivo fue concebido originalmente por Robert Campenot, en el que los cuerpos celulares están aislados de sus axones. La técnica de preparación de estas cámaras de compartimentos para el cultivo de neuronas sensoriales recapitula la estimulación selectiva de terminales de las neuronas que se produce la liberación in vivo de los siguientes derivados de objetivos neurotrofinas. Retrógrada eventos de señalización que requieren transporte a larga distancia microtúbulos retrógrada dependientes tienen importantes implicaciones para el tratamiento de enfermedades neurodegenerativas.

Protocol

Preparación de los reactivos

  1. Revestimiento de colágeno: el colágeno capa p35 placas de cultivo de tejidos y colocar en un horno a 37 ° C durante 2 días antes de engrasar los divisores. La concentración final de colágeno debe estar en 0,71 mg / ml diluida en 0,001 N HCl. A continuación, añadir 1 ml de la mezcla por placa.
  2. Cargadores de grasa: A fin de llenar el cargador de grasa, una jeringa de 60 ml debe ser llenado con grasa de vacío Corning. Use la jeringa para llenar el cargador de grasa, lo envuelve en papel de aluminio y luego autoclave durante 45 minutos.
  3. Separadores de teflón: los separadores se pueden volver a utilizarse después de cada experimento, pero primero debe limpiarse de forma correcta. Retire el separador de la placa, limpie toda la grasa restante y el lugar en ácido sulfúrico durante 2 días. Después de la eliminación del ácido, enjuagar con agua 3 veces, hacer hervir durante 20 minutos, deje que se seque, coloque en un recipiente de vidrio p100 Petri y autoclave durante 20 minutos.
  4. N2-metil: Pesar 1,5 g de metilcelulosa y colocarlo en un frasco de 500 ml. Añadir una barra de agitación y autoclave durante 20 minutos en seco (a partir de este momento todo el trabajo debe ser estéril). A continuación, añadir 500 ml de suero libre de los medios de comunicación (N 2), y revuelva en una cámara frigorífica hasta que se disuelva. Alícuota en 50 ml conicals y congelar a -20 ° C. Para las acciones de trabajo, alícuota de una de las 50 conicals mL en tubos de 1 ml y congelar a -20 ° C.
  5. DRG los medios de comunicación: DMEM, 5% de suero de caballo inactivado por calor, y el 1% de penicilina estreptomicina.
  6. 100ng/mL DRGN los medios de comunicación: La concentración de acciones de ambas factor de crecimiento nervioso (NGF) y el cerebro-factor neurotrófico derivado (BDNF) es 1mg/ml. Diluir cada una de las neurotrofinas 1:10.000 en los medios de comunicación DRG. Las culturas pueden ser cultivadas en NGF solo, lo que altera el complemento de las neuronas que sobreviven en los cultivos.

    Nota: Cuando sea necesario, la concentración de (arabinósido de citosina) es AraC 1um y se utiliza a una concentración final de 0.3uM. Esto inhibe el crecimiento de las células de Schwann y la glía otros.

  7. 10ng/ml DRGN los medios de comunicación: Diluir el 100ng/mL DRGN los medios de comunicación (1:10) con los medios de comunicación DRG.

    Figura 1


    Figura 1. Herramientas necesarias para la puesta en marcha

Configuración de las cámaras de compartimentos (iniciar este proceso de 1-2 días antes de la disección)

  1. Hacer un rasguño en el medio de un colágeno recubiertas p35 plato con un movimiento hacia afuera.
  2. 30ul lugar de N2-metil-celulosa en el medio de la nada. Set platos a un lado hasta divisor es engrasada.
  3. Conecte un adaptador de calibre 23 stub luer al cargador de grasa. Sujete el separador de teflón con un par de pinzas hemostáticas 90 º de ángulo y déjelo con el divisor hacia arriba con un microscopio. Trazar la divisoria con la grasa de asegurarse de que cada vez que el adaptador se coloca en un nuevo punto de partida se inserta el adaptador en la grasa del paso anterior para que haya una línea continua de grasa (ver diagrama). Una vez que la grasa se aplica a la división entera, a su vez uno de los platos preparados p35 boca abajo y colocarlo de modo que el N2-metil-celulosa es el compartimiento medio. Presione sobre el fondo del plato con un par de pinzas. Asegúrese de presionar en el interior de la división en las cuatro esquinas (arriba a la izquierda, abajo a la derecha, parte superior derecha, inferior izquierda, se indica en el diagrama de "X").

    Figura 2

    Figura 2: Pasos para engrasar el divisor

    Nota: Es importante que se mantenga la firmeza necesaria para que la grasa hace que el sellado completo con el plato, pero si la presión se agrega demasiado, los axones no se cruzarán en los compartimientos laterales.

    Levante el hemostatos, dale la vuelta y despinzar el divisor. Por último, coloque el plato con el divisor firmemente bajo el microscopio se centra en la parte inferior del compartimento del medio. Con el cargador de la grasa, hacer una pequeña barrera (0,25 cm), de modo que una vez que las células se colocan en el compartimiento medio que no pueda escapar.
  4. Después de haber creado varias culturas, los medios de comunicación en lugar DRG cada uno de los compartimentos laterales y colocar en una incubadora en la que las células se mantendrá. Permita que las culturas a sentarse por varias horas y luego compruebe si hay fugas. Si los medios de comunicación se ha filtrado en el compartimiento del medio, entonces la cultura no se puede utilizar.

    Nota: La primera vez que el aprendizaje de esta técnica, es importante crear más cultivos que se necesitan para un experimento, ya que varios se gotean.

    Figura 3

    Figura 3: "Good vs fugas" cultura

El mantenimiento de las neuronas DRG en las culturas en compartimentos

  1. Día 1: Reemplazar DRG los medios de comunicación en los compartimientos del lado de los medios de comunicación 100ng/mL DRGN + AraC. Realizar la disección y añadir las células en el compartimiento central (100.000 células).
  2. Día 2: Agregar 10ng/ml los medios de comunicación + AraC en el exterior de la división de teflón hasta que los medios de comunicación fluye sobre la barrera de grasa y fluido intercambio con el compartimiento central.
  3. Día 3: Vuelva a colocar los medios de comunicación en los compartimientos de un lado a 100ng/mL DRGN omitiendo el AraC y alrededor de las con 10ng/ml DRGN omitiendo el AraC.
  4. Día 6: Vuelva a colocar los medios de comunicación en los compartimientos de un lado a 1ng/ml + AraC y rodearse de los medios de comunicación DRG + AraC.
  5. Día 9: El uso de la experimentación.


    Figura 4

    Figura 4: las imágenes IHC de los cuerpos celulares y axones distales



    Nota: Al cambiar los medios de comunicación, es importante para aspirar el líquido de la parte superior del compartimento de cada lado. Además, nunca cambiar los medios de comunicación desde el compartimento del medio en sí, sólo desde la rodean, y dejar que fluya sobre la barrera de grasa en el centro.

Subscription Required. Please recommend JoVE to your librarian.

Discussion

En este video, nos han demostrado cómo preparar y mantener cámaras de compartimentos para su uso en el cultivo de neuronas DRG. Hecho correctamente, este sistema permite la separación del cuerpo celular del axón con el fin de estudiar los mecanismos por los cuales las neurotrofinas señal a través de los axones largos. Dado que no es el aislamiento de fluidos entre los compartimientos, permite la estimulación selectiva o el tratamiento de un compartimiento sin los otros compartimientos se vean afectados. Culturas compartimentados cámara puede soportar otros tipos de células incluyendo neuronas simpáticas de los ganglios cervicales superiores, las neuronas ganglionares de la retina y las neuronas corticales. Comprensión espacial de la transducción de señales de neurotrofinas pueden proporcionar nuevos conocimientos sobre los tratamientos de los trastornos neurodegenerativos. Varias enfermedades neurodegenerativas, incluyendo la enfermedad de Alzheimer, enfermedad de Huntington y la enfermedad de la neurona motora, están asociados con defectos en el transporte axonal. Estudios recientes han utilizado cámaras de microfluidos en lugar de estas cámaras de compartimentos. Las cámaras de 4,5 microfluidos tienen varias ventajas para el análisis de imágenes.

Estudios anteriores han probado la capacidad de estas culturas para evitar la difusión entre el axón y el compartimiento del cuerpo de la célula 1,3,6. Esto puede ser probado mediante la adición de bajas concentraciones de un medio de contraste, como azul de tripano a un compartimiento único, y buscar la difusión del colorante. Debe haber poca difusión o no visibles dentro de las 24 horas.

Subscription Required. Please recommend JoVE to your librarian.

Acknowledgements

Nos gustaría dar las gracias a Katharina Cosker Courchesne y Stephanie útil para los debates.

Materials

Name Type Company Catalog Number Comments
collagen Reagent BD Biosciences 354249
N2-methylcellulose 400CPS Reagent Sel-Win Chemicals
Teflon divider Other Tyler Research CAMP10 many other types of dividers are available
Pin rake Tool Tyler Research Camp-PR
Grease loader Tool Tyler Research Camp-GLSS
DMEM Reagent Fisher Scientific MT10017CV
NGF Reagent PeproTech Inc 450-01
BDNF Reagent PeproTech Inc 450-02
High vacuum grease Reagent Fisher Scientific 14-635-5D
AraC Reagent Sigma-Aldrich C-1768
23 gauge luer stub adapter Tool Fisher Scientific 427565
90° angle hemostats Tool Roboz Surgical Instruments Co. RS-7035

DOWNLOAD MATERIALS LIST

References

  1. Campenot, R. B. Independent Control of the Local Environment of Somas and Neurites. Methods in Enzymology. 58, 302-307 (1979).
  2. Watson, F. L., et al. Neurotrophins use the Erk5 pathway to mediate a retrograde survival response. Nature Neuroscience. 4, 981-988 (2001).
  3. Heerssen, H. M., et al. Dynein motors transport activated Trks to promote survival of target-dependent neurons. Nature Neuroscience. 7, 596-603 (2004).
  4. Taylor, A. M., et al. A microfluidic culture platform for CNS axonal injury, regeneration and transport. Nature Methods. 2, 599-605 (2006).
  5. Park, J. W., et al. Microfluidic culture platform for neuroscience research. Nat Protoc. 4, 2128-2136 (2006).
  6. Ure, D. R., et al. Retrograde transport and steady-state distribution of 125I-nerve growth factor in rat sympathetic neurons in compartmented cultures. J Neuroscience. 4, 1282-1290 (1997).

Comments

49 Comments

  1. Hi I have just watch your presentaion on the Preparation and Maintenance of Dorsal Root Ganglia Neurons in Compartmented Cultures and it was very impressive. I am intersted in the function of the methylcellulose, dŒs it provide a space through which the axons can pass, do the cell bodies settle on the collagen surface. Regards Paul

    Reply
    Posted by: Anonymous
    November 19, 2008 - 7:27 AM
  2. Hi Paul-
    Thank you for your comment.  The cell bodies do settle onto the collagen surface.  As for the small amount of N²-methylcellulose that is placed on the center of the scratch, the media acts as a space for the axons to extend easily on and the methylcellulose is used to thicken the media slightly. 

    Good Luck,
    Maria

    Reply
    Posted by: Anonymous
    December 15, 2008 - 3:06 PM
  3. Hi, your method looks simple and powerfull. It's possible to make an immuno staining without to remove the teflon divider? DŒs the divider cause troubles during immunofluorescence staining for example? Regards Giuseppe 

    Reply
    Posted by: Anonymous
    December 13, 2008 - 7:35 AM
  4. Hi Giuseppe-
    Thank you for your comment. Fix, wash and add antibodies as usual within the compartments for immunostaining. Remove the divider, carefully wipe away excess grease and coverslip before imaging.

    Good Luck,
    Maria

    Reply
    Posted by: Anonymous
    December 15, 2008 - 3:52 PM
  5. Hi Maria,

    I had a question about immunostaining. So in reference to your above comment, you keep the teflon dividers in place when you fix and add antibodies, and only remove it at the end of immunostaining? Is anything else different?

    Thanks,
    Supraja.

    Reply
    Posted by: Anonymous
    October 22, 2010 - 7:01 PM
  6. Hi Supraja-
    Yes, only remove the divider at the end of the immunostaining. Everything else is done exactly the same.

    Good Luck,
    Maria

    Reply
    Posted by: Anonymous
    October 25, 2010 - 3:42 PM
  7. Hi, beautiful work, congratulations! Have you tried to cultivate adult DRG also? Best regards and good luck! Otilia

    Reply
    Posted by: Anonymous
    February 5, 2009 - 6:34 AM
  8. Hi Otilia- Thank you for your comment.  We have not tried cultivating adult DRGs in this system.   Good Luck, Maria

    Reply
    Posted by: Anonymous
    March 19, 2009 - 12:03 PM
  9. Dear Otilia,

    I too was really impressed by Maria's work and wanted to use the technique for my work. I just wanted to let you know that I have been using adult DRGs in this system and it still works brilliantly.

    Best regards,

    Philippa

    Reply
    Posted by: Anonymous
    September 2, 2009 - 1:02 PM
  10. Thanks a lot, Philippa!

    Reply
    Posted by: Anonymous
    January 18, 2010 - 4:08 PM
  11. Hi, I hvae not been able to watch the video.  Could you please email me  a copy. Sincerely, Supinder Bedi, Ph.D. University of Texas, Houston

    Reply
    Posted by: Anonymous
    February 11, 2009 - 3:39 PM
  12. Hi, We are very interested in your method, that’s great!
    We have one question: on day1, how do you "perform dissection and add cells to center compartment (100,000cells)"?  Can you please provide more details? Best regards Yi

    Reply
    Posted by: Anonymous
    March 5, 2009 - 3:52 PM
  13. Hi Amazing video; really impressive and well constructed. I'm hoping to use the compartmented culture system for some of my experiments and so am currently trying to set it up however as i hope to do immunostaining of the cultures I was just wondering whether you use just normal polystyrene cell culture dishes or glass-bottomed dishes/ dishes with a glass coverlip plated in it? If you use glass what thickness and type of glass do you use? The reason I ask is I've been seeing whether I can coat glass coverslips with collagen in order to be able to detach them from the dishes and mount them onto microscope slides later however I don't seem to be able to coat the borosilicate glass coverslips that I have. I've tried all sorts of methods including your protocol here but it seems that the collagen dŒsn't want to stick to the glass. They are definitely degreased throughly therefore I was wondering whether it was an issue with the charge of the glass and whether there was a different sort of glass I should be using. Any suggestions would be really appreciated. Best regards, Philippa

    Reply
    Posted by: Philippa M.
    March 19, 2009 - 7:25 AM
  14. Hi Philippa- Thank you for your comment.  We only use polystyrene cell culture dishes that have been coated with collagen.  It is impossible to make the necessary scratches on the glass.  We often do immunostaining and image with this system, however, there is another system, microfluidic chambers, that may give you higher quality images. Good Luck, Maria  

    Reply
    Posted by: Anonymous
    March 19, 2009 - 11:56 AM
  15. Dear Philippa, I have seen the video and read your comment only yesterday, but maybe this can help: at www.mattek.com, you can order 35mm or 50mm dishes with a partially glass bottom (coverslip that you can even take out afterwards and that is either uncoated or coated with collagen or poly-D-lysine). We have been using them on a regular basis for live cell imaging and they're very useful. From my side, I was wondering if you made any progress with scratching glass dishes, because I would like to do this for my particular experiment. Best regards, Katrien

    Reply
    Posted by: Katrien J.
    August 28, 2009 - 5:01 AM
  16. Hi Katrien,

    Thank you for your suggestions. In answer to your question unfortunately I wasn't able to scratch the glass coverslips. Unfortunately I think it would be a case of having to get them engraved independently. I've been using the polystyrene cell culture dishes since and although maybe the optics aren't as good as they could I'm actually still able to obtain very good images after immunostaining with the inverted microscope. So if this is similar to what you plan to do it might be worth a try. Best of luck.

    Philippa

    Reply
    Posted by: Anonymous
    September 2, 2009 - 3:29 AM
  17. Hi Philippa, thanks for your answer. Would it be possible to let me know what magnification objective you use and what kind of structures you are looking at, just to have an idea if this might work for me as well?
    Thank you and best regards, katrien

    Reply
    Posted by: Katrien J.
    September 2, 2009 - 3:38 AM
  18. Of course: I work with a ²0x magnification and take a series of consecutive images of the neurites that have extended into the side compartments in order to reconstruct the whole image and assess neurite outgrowth before and after a treatment. I would prefer to use 10x magnification but we don't have the lens for it. Hope that helps. Philippa

    Reply
    Posted by: Anonymous
    September 2, 2009 - 12:59 PM
  19. Hi Amazing video; really impressive and well constructed. I'm hoping to use the compartmented culture system for some of my experiments and so am currently trying to set it up however as i hope to do immunostaining of the cultures I was just wondering whether you use just normal polystyrene cell culture dishes or glass-bottomed dishes/ dishes with a glass coverlip plated in it? If you use glass what thickness and type of glass do you use? The reason I ask is I've been seeing whether I can coat glass coverslips with collagen in order to be able to detach them from the dishes and mount them onto microscope slides later however I don't seem to be able to coat the borosilicate glass coverslips that I have. I've tried all sorts of methods including your protocol here but it seems that the collagen dŒsn't want to stick to the glass. They are definitely degreased throughly therefore I was wondering whether it was an issue with the charge of the glass and whether there was a different sort of glass I should be using. Any suggestions would be really appreciated. Best regards, Philippa

    Reply
    Posted by: Philippa M.
    March 19, 2009 - 8:12 AM
  20. Hi Amazing video; really impressive and well constructed. I'm hoping to use the compartmented culture system for some of my experiments and so am currently trying to set it up however as i hope to do immunostaining of the cultures I was just wondering whether you use just normal polystyrene cell culture dishes or glass-bottomed dishes/ dishes with a glass coverlip plated in it? If you use glass what thickness and type of glass do you use? The reason I ask is I've been seeing whether I can coat glass coverslips with collagen in order to be able to detach them from the dishes and mount them onto microscope slides later however I don't seem to be able to coat the borosilicate glass coverslips that I have. I've tried all sorts of methods including your protocol here but it seems that the collagen dŒsn't want to stick to the glass. They are definitely degreased throughly therefore I was wondering whether it was an issue with the charge of the glass and whether there was a different sort of glass I should be using. Any suggestions would be really appreciated. Best regards, Philippa

    Reply
    Posted by: Philippa M.
    March 19, 2009 - 2:04 PM
  21. Hi,   Could you please elaborate a bit more on the DRG dissection and how you get to 100,000 cells please Thanks,   Gustavo Ayala R. Clarence and Irene H Fullbright Chair in Pathology Professor Baylor College of Medcine  

    Reply
    Posted by: Anonymous
    March 24, 2009 - 4:58 PM
  22. hi, thank you for the presentation, your novel model for preparation of drg neurons seem to be very efficient. can you please elaborate how did you get the neurons and how old was the rat fetus? thanks ahead, Amit Moran, moranamit@gmail.com    

    Reply
    Posted by: Anonymous
    March 30, 2009 - 11:58 PM
  23. It is very interesting. I am wondering regarding the use of NGF. You have used Recombinant human beta NGF. Is there any special reason you used human NGF? or is it ok that we can use rat NGF?

    Reply
    Posted by: Anonymous
    June 23, 2009 - 3:16 PM
  24. Hi Anand-

    We prefer to use the recombinant human NGF but it is certainly okay to use rat NGF.

    Good Luck,
    Maria

    Reply
    Posted by: Anonymous
    June 30, 2009 - 12:51 PM
  25. Thanks for your presentation. Have you ever tried cultivating hippocampal neurons? If it 's, what did you coated with your dish, collagen or poly-l-lysine?

    Regards


    Mei

    Reply
    Posted by: Anonymous
    August 18, 2009 - 4:35 PM
  26. Hi Mei-

    Sorry, we have never cultivated hippocampal neurons using this system. There is a paper, Ivins et al., 1998, that uses a modified compartmented culture system that you may find helpful.

    Good Luck,
    Maria

    Reply
    Posted by: Anonymous
    August 21, 2009 - 1:39 PM
  27. Dear colleges, thank you very much for nice performance and demonstration of this method!
    I have a question. How do you think could I use this compartmented culture to investigated axonal degeneration. If I will add a substance under the investigation to axonal part of chamber, how could I be sure that this compound dŒs not penetrate to cell body part?
    Thank you very much for answer beforehand and good luck in your future experiment!!!

    Reply
    Posted by: Liudmila E.
    September 28, 2009 - 9:17 AM
  28. Hi Lula-
    If set up properly (no leakage) these chambers are fluidically isolated.

    Good Luck,
    Maria

    Reply
    Posted by: Anonymous
    January 13, 2010 - 2:54 PM
  29. Ok, how it could be isolated?: side parts and middle parts fluidically, if even neurites can pass through this barrier. That means that compounds (chemical substance) can do it also. am I wrong?

    Reply
    Posted by: Anonymous
    January 14, 2010 - 4:49 AM
  30. Hi Maria,
    I will like to confirm the concentration of collagen coating that you use have on the protocol (0,71mg/mL diluted in 0,001N HCl). In our lab we use collagen coating for cultures and the concentration is very less.
    Regards
    AleMorán

    Reply
    Posted by: Anonymous
    September 28, 2009 - 1:09 PM
  31. Hi Alemor-
    Yes, that is the correct concentration of collagen.
    Good Luck,
    Maria

    Reply
    Posted by: Anonymous
    January 13, 2010 - 2:39 PM
  32. Thanks Maria,
    I would like to ask you a new cuestion. Did you cut de needle to avoid de sharp point?
    Regards

    Reply
    Posted by: Anonymous
    March 30, 2010 - 11:29 AM
  33. Hi-
    The adapter that we use has a blunt end. It's a ²3 gauge luer stub adapter (Fisher cat #4²7565).
    Good Luck,
    Maria

    Reply
    Posted by: Anonymous
    March 30, 2010 - 2:55 PM
  34. Hi, It is quite interesting. I need some help in isolating DRG. I tried. But not able to identify them. Can you pls help me.
    Thanks in advance.

    Reply
    Posted by: Anonymous
    October 26, 2009 - 3:44 PM
  35. Hi Anand-
    The DRGs are located along each side of the spinal cord. In the E15 rats, the DRGs are clearly visible as ganglia along the spinal cord. At older ages the DRGs are encased within the vertebrae.
    Good Luck,
    Maria

    Reply
    Posted by: Anonymous
    January 13, 2010 - 2:42 PM
  36. Hi,
    Great presentation!
    I was wondering, what antibodies did you use for the IHC images?

    Thanks,
    Amy

    Reply
    Posted by: Amy M.
    December 1, 2009 - 8:43 PM
  37. Hi,

    many thanks for posting this really helpful video. When you apply the grease on the divider do you work under a hood? If not, how do you maintain sterility? I have tried working outside a hood and I have had problem of contamination (all solutions, and tools have been either filtered or autoclaved)

    Kind regards,

    Ale

    Reply
    Posted by: Anonymous
    January 13, 2010 - 11:31 AM
  38. Hi Ale-
    It would be best if you set up the cultures in a dissecting hood if you are having problems with contamination. We use UV to sterilize the area but the hood that we work under has no air flow and is therefore not a completely sterile environment.

    Good Luck,
    Maria

    Reply
    Posted by: Anonymous
    January 13, 2010 - 2:51 PM
  39. Hi
    Beautiful work! And I have been tried to constructed the compartmented cultures for many times but failed .I don't know why. I wonder how do you get to 100,000 cells .Could you please elaborate a bit more on the DRG dissection .In my compartmented cultures ,there are only a few axons across the barrier and get to the distal compartment.I have tried it for many times but the results are the same.I guss if the cell differentiation is not good enough or something wrong with the applying grease.I have no idea .So i think if you can give me your email and I have many problems to ask you.My email is jjdongch@gmail .com. I am looking forward to your reply .Thank you!

    Reply
    Posted by: jingjing d.
    May 17, 2012 - 7:39 AM
  40. Hi!, excellent video!. We are reproducing this system, but now, we have problem with collagen coating. It does not gelled 3 or 5 days after!, in fact, it does not change. We´re using the same collagen (BD Bioscience ,354249) and your final concentration (0.71mg/ml diluted in 0.001N HCl). What recommendations do you have?.

    Kind Regards!

    Reply
    Posted by: DIANA M.
    January 9, 2014 - 1:00 PM
  41. Hi Diana-
    The plates need to be put in a dry oven at 37 degrees for 3 days. Are you doing that? Also, the collagen doesn't gel, it dries completely. Good luck and feel free to email me with any additional questions. maria_pazyra@dfci.harvard.edu

    Reply
    Posted by: Anonymous
    January 9, 2014 - 1:29 PM
  42. Great article. What are the product numbers and companies for methylcellulose and N2 serum free media?

    Reply
    Posted by: Eric W.
    June 17, 2014 - 3:04 PM
  43. Hi Eric- The methylcellulose we currently use is from Xenex (catalog # E4M) and the serum free media is just plain DMEM. Good Luck, Maria

    Reply
    Posted by: Anonymous
    June 17, 2014 - 3:21 PM
  44. Hi, Maria
    Your article and video in jove helped our research a lot, excellent!
    I have one question. Are you still using N2-MC? Please let me know, if there is better one that can prevents grease from closing grooves.
    Thank you
    S
    Thank you

    Reply
    Posted by: Shingo K.
    October 13, 2015 - 11:31 AM
  45. Hi Shingo-
    I'm not sure I understand your question. Are your axons not growing through the grooves? The N2 is used to help the axons slide under the grease and we still use the Xenex brand. If your axons are not growing through it is probably more about how much pressure you are applying when you press the dish to the teflon divider.

    Good Luck,
    Maria

    Reply
    Posted by: Anonymous
    October 13, 2015 - 11:54 AM
  46. Hi Maria-
    Thanks for your quick reply.
    Axons do grow well into the next chamber with N2-MC, but not through all the grooves I made (~50%). I am wondering if there is other potential substance (i.e., one with higher viscosity) that I can try...
    I am expecting more... or do you think ~50% is OK ?
    shingo

    Reply
    Posted by: Shingo K.
    October 13, 2015 - 1:53 PM
  47. Shingo-
    My suggestion would be to add more N2 to cover more of the grooves. I don't know of any other substance that would work. 50% is actually pretty good.

    Best,
    Maria

    Reply
    Posted by: Anonymous
    October 13, 2015 - 2:09 PM
  48. Hi Maria,

    Thank you for publishing this protocol. I have been trying to grow cortical neurons in a custom made Teflon divider (1.5mm width of central compartment and 0.8mm height of divider), without much success. The cell bodies leak in the side compartments.
    I have coated the dish with poly-d-lysine instead of collagen do you think this can affect the chamber set up? Have you ever tried to culture cortical neurons in this chamber or know someone who has? I'm thinking that perhaps the cell body of cortical neurons is smaller than DRGs and this could cause leakage, what do you think?

    Regarding the methylcellulose step. I diluted it in Neurobasal (already supplemented with Pen Strep and Glutamax). I've added it on the middle of the scratched region and then applied the divider with grease in the same way as you explain in the video.I removed it before adding the cells but I did not let it dry. Are you supposed to leave the drop medium with methylcellulose when cells are added? How long do the cells need before they attach to the dish completely?

    Any advice on how to improve my method would be highly appreciated.

    Thanks a lot in advance,

    Anna

    Reply
    Posted by: University of Aberdeen .
    April 5, 2016 - 2:05 PM
  49. Hi Anna-
    We have never cultured cortical neurons in this system before but I do think that the collagen or matrigel (that's what we use now) is essential. I don't think the size of the cells is a factor. It's probably more about the grease. And mastering that only comes with lots and lots of practice. Are you using these for biochemistry? If you are using them for staining or imaging you should look into microfluidic chambers. We use those in the lab too. We leave the methylcellulose in the center compartment so no need to remove it before plating the cells....and the cells should attach within a couple of hours. Good luck and please feel free to email me with any further questions. maria_pazyra@dfci.harvard.edu

    Best,
    Maria

    Reply
    Posted by: Anonymous
    April 5, 2016 - 3:34 PM

Post a Question / Comment / Request

You must be signed in to post a comment. Please or create an account.

Usage Statistics