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 JoVE Immunology and Infection

Isolamento de células de camundongo Peritoneal Cavity

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BloodCenter of Wisconsin, Blood Research Institute

 

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Cite this Article: Isolamento de células de camundongo Peritoneal Cavity

Ray, A., Dittel, B. N. Isolation of Mouse Peritoneal Cavity Cells. J. Vis. Exp. (35), e1488, doi:10.3791/1488 (2010).

Abstract: Isolamento de células de camundongo Peritoneal Cavity

A cavidade peritoneal é uma cavidade ligada à membrana e cheias de líquido abdominal dos mamíferos, que contém o fígado, baço, a maior parte do trato gastro-intestinal e outras vísceras. Abriga uma série de células do sistema imunológico, incluindo macrófagos, células B e células T. A presença de um elevado número de macrófagos naïve na cavidade peritoneal torna um local preferido para a coleção de macrófagos teciduais naïve residente (1). A cavidade peritoneal também é importante para o estudo das células B por causa da presença de um único subconjunto de células da cavidade peritoneal residente B conhecidas como células B1, além de células B2 convencionais. Células B1 são subdivididas em B1a e B1b células, que podem ser distinguidas pela expressão de superfície de CD11b e CD5. Células B1 são uma importante fonte de IgM natural, proporcionando proteção precoce de uma variedade de patógenos (2-4). Estas células são auto-reativos na natureza (5), mas como eles são controlados para evitar a auto-imunidade ainda não é totalmente entendido. Pelo contrário, CD5

Protocol: Isolamento de células de camundongo Peritoneal Cavity

  1. Antes de iniciar o processo, os seguintes itens precisam ser coletados e preparados:
    • Gelo
    • Seringa de 5 ml com agulha 27g
    • Seringa de 5 ml com agulha 25g
    • Bloco de isopor e pinos para a montagem do rato
    • Bandeja em que o bloco de montagem pode ser colocado
    • Tesouras e pinças
    • Tubos de coleta
    • Etanol 70%
    • PBS com 3% de soro fetal bovino (FCS) (Pré-refrigerado e mantido em gelo)
  2. Euthanize o mouse, pulverizá-lo com etanol 70% e montá-la no bloco de isopor em sua parte traseira.
  3. Usando uma tesoura e uma pinça cortar a pele externa do peritônio e puxe-o de volta para expor a pele interna que reveste a cavidade peritoneal.
  4. Injectar 5 ml de PBS gelado (com FCS 3%) na cavidade peritoneal, utilizando uma agulha 27G. Empurre a agulha devagar no peritônio tomando cuidado para não perfurar nenhum órgão.
  5. Após a injeção, massagear suavemente o peritônio para desalojar quaisquer células anexado na solução PBS.
  6. Inserir uma agulha de 25 g de bisel, para cima, ligada a uma seringa de 5 ml no peritônio e recolher o líquido enquanto se move a ponta da agulha com cuidado para evitar o entupimento pelo tecido adiposo ou outros órgãos. Recolher o líquido tanto quanto possível, e depositar a suspensão de células coletadas em tubos mantidos em gelo depois de retirar a agulha da seringa.
    Opcional: Repita o passo 4-6
  7. Faça uma incisão na pele interna do peritônio e, mantendo a pele com uma pinça use um plástico Pasteur pipeta para coletar o líquido restante da cavidade.
  8. Se no passo 6 ou 7 de contaminação por sangue visível é detectada em seguida, a amostra contaminada deve ser descartada.
  9. Gire a suspensão de células coletadas em 1500 RPM por 8 minutos, descartar o sobrenadante e ressuspender as células em meios de comunicação desejado ou PBS para contagem.

Protocolo alternativo para a obtenção tioglicolato provocou macrófagos:

Este método é usado para obter um maior rendimento dos macrófagos.

  1. Injectar 5 ml de 3% (w / v) Brewer tioglicolato médio (7) na cavidade peritoneal de cada rato.
  2. Aguarde 3-5 dias, e avance para o passo 1 acima para a recolha das células.

Comparação com a abordagem nonelicited, aproximadamente 10 vezes mais macrófagos podem ser coletados. A única preocupação é que os macrófagos obtidos por este procedimento diferem em algumas de suas propriedades fisiológicas.

Resultados representativos:

De um mouse não-manipulado, 5-10 milhões de células da cavidade peritoneal pode ser obtida com um protocolo de um bom isolamento. Entre todas as células vivas, 50-60% são células B, macrófagos ~ 30% e 5-10% são células T (Fig. 1).

Figura 1
Figura 1. Fenótipo de células isoladas da cavidade peritoneal. Após o isolamento de células cavidade peritoneal foram corados com anti-rato TCRβ-FITC, B220-PE-Texas vermelho, azul-Pacífico CD11b, CD23-PE-Cy7 e CD5-APC. Parcelas fluxo representante citometria mostram porcentagens de células B e T (a), macrófagos (b), B1 e B2 células (c) e células B1a e B1b (d).

Discussion: Isolamento de células de camundongo Peritoneal Cavity

Isolamento de células da cavidade peritoneal é uma técnica importante para o estudo das diferentes células do sistema imunológico, principalmente macrófagos e subpopulações de células B específicas. Embora este seja um processo simples, existem alguns passos críticos envolvidos. Presença de contaminação de sangue na amostra coletada deve ser evitada para obter uma população de células pura peritoneal da cavidade. Eutanásia por deslocamento cervical deve ser feito com cuidado para evitar a contaminação de sangue na cavidade peritoneal. Alternativamente CO 2 pode ser usado. Além disso, durante o procedimento adequado de cuidados devem ser tomados para evitar a perfuração da bexiga ou quaisquer outros órgãos na cavidade peritoneal. Recuperar a maior parte do fluido injetado é também importante para o rendimento das células.

Este procedimento é amplamente utilizado para estudar a biologia dos macrófagos desde números moderados de residentes, macrófagos unstimulated pode ser facilmente obtida a partir da cavidade peritoneal, em contraste com a laboriosa tarefa de diferenciar as células progenitoras mielóides em macrófagos maduros in vitro, usando fator estimulador de colônias de macrófagos (8 , 9). O rendimento de macrófagos da cavidade peritoneal pode ser melhorada usando o método de elicitação de tioglicolato, embora o uso tioglicolato pode alterar as propriedades fisiológicas dos macrófagos (7).

Células B são uma parte importante do nosso sistema imunológico jogar um papel crucial em ambos os imunidade inata e adaptativa. Em subpopulações de células diferentes B, células B1 compõem um único subconjunto de células B envolvidos na imunidade inata, auto-imunidade e regulação imune. Células B1 estão localizados principalmente na cavidade peritoneal e estão reabastecendo self. Eles são uma das principais produtoras de IgM natural que fornece a primeira linha de defesa contra uma série de vírus e bactérias (10-12). Células B1 também são uma importante fonte de IL-10 (6), que é uma importante citocina envolvida na regulação imune. Embora vários estudos tenham sido prosseguida com as células B1, ainda há espaço para uma avaliação mais aprofundada das suas funções contrastantes, especialmente o seu papel regulador. Peritoneal cavidade método de isolamento de células proporciona a oportunidade única de estudar as funções das células B1.

Disclosures: Isolamento de células de camundongo Peritoneal Cavity

Acknowledgements: Isolamento de células de camundongo Peritoneal Cavity

Este trabalho foi financiado em parte pelo NIH conceder AI069358 ea Fundação de Pesquisas BloodCenter.

Materials: Isolamento de células de camundongo Peritoneal Cavity

Name Company Catalog Number Comments
Thioglycollate Medium, Brewer Modified BD Biosciences 211716

References: Isolamento de células de camundongo Peritoneal Cavity

  1. Zhang, X., Goncalves, R. and Mosser, D.M. The isolation and characterization of murine macrophages. Current Protocols in Immunology (2008).
  2. Boes, M., Prodeus, A.P., Schmidt, T., Carroll, M.C. and Chen, J. A critical role of natural immunoglobulin M in immediate defense against systemic bacterial infection. J. Exp. Med. 188, 2381-2386 (1998).
  3. Mc Daniel, L.S., Benjamin, W.H., Forman, C. and Briles, D.E. Blood clearance by anti-phosphocholine antibodies as a mechanism of protection in experimental pneumococcal bacteremia. J. Immunol. 133, 3308-3312 (1984).
  4. Paciorkowski, N., Porte, P., Shultz, L.D. and Rajan, T.V. B1 B lymphocytes play a critical role in host protection against lymphatic filarial parasites. J. Exp. Med. 191, 731-736 (2000).
  5. Mercolino, T.J., Arnold, L.W., Hawkins, L.A. and Haughton, G. Normal mouse peritoneum contains a large population of Ly-1+ (CD5) B cells that recognize phosphatidyl choline: relationship to cells that secrete hemolytic antibody specific for autologous erythrocytes. J. Exp. Med. 168, 687-698 (1988).
  6. O'Garra, A., Chang, R., Go, N., Hastings, R., Haughton, G. and Howard, M. Ly-1 B (B-1) cells are the main source of B cell derived interleukin 10. Eur. J. Immunol.  22, 711-717 (1992).
  7. Hoover, D.L. and Nacy, C.A. Macrophage activation to kill Leishmania tropica: Defective intracellular killing of amastigotes by macrophages elicited with sterile inflammatory agents. J. Immunol. 132, 1487-1491 (1984).
  8. Austin, P.E., McCulloch, E.A. and Till, J.E. Characterization of the factor in L-cell conditioned medium capable of stimulating colony formation by mouse marrow cells in culture. J. Cell Physiol. 77, 121-134 (1971).
  9. Stanley, E.R. The macrophage colony-stimulating factor, CSF-1. Methods Enzymol. 116, 564-587 (1985).
  10. Baumgarth, N., Chen, J., Herman, O.C., Jager, G.C. and Herzenberg, L.A. The role of B-1 and B-2 cells in immune protection from influenza virus infection. Curr. Top. Microbiol. Immunol. 252, 163-169 (2000).
  11. Baumgarth, N., Herman, O.C., Jager, G.C., Brown, L.E., Herzenberg, L.A. and Chen, J. B-1 and B-2 cell-derived immunoglobulin M antibodies are nonredundant components of the protective response to influenza virus infection. J. Exp. Med. 192, 271-280 (2000).
  12. Berland, R. and Wortis, H.H. Origins and functions of B-1 cells with notes on the role of CD5. Annu. Rev. Immunol. 20, 253-300 (2002).

Ask the Author: Isolamento de células de camundongo Peritoneal Cavity

29 Comments

Hello Dr. Ray,
Thank you for your beautiful demo & the theory.
I have 2 questions:
1. How can one differentiate between the B & T-cells & macrophages without using FACS ?
2. Is there a way to get only the macrophages ?
Thanks.
Chandra

1

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Posted by: ChandraMarch 10, 2010, 8:29 AM

1.FACS buffer is just PBS with 2%FBS. Actually, you can only use PBS for isolating the peritoneal cells. However, I don't understand what you are asking.
2. You can get macrophages by letting cells adhere to the plate for 2 hours, and wash the cells with PBS 2 times. Since macrophages are the only cells that can adhere to the plate, other cells are gonna be washed off.

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Posted by: Shan Y.May 5, 2010, 8:38 PM

Dear Chandra:
You can use magnetic cell sorting to obtain the different cell populations post isolation from the peritoneal cavity and through thioglycollate elicitation you will obtain more macrophages. You can purify the macrophages either by adhering them to petri dishes or through cell sorting.
Thanks,
Avijit

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Posted by: Bonnie D.June 8, 2010, 5:13 PM

Beautiful tutorial! Thank you!

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Posted by: AnonymousApril 29, 2010, 6:00 PM

Thanks

2.1

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Posted by: Bonnie D.June 8, 2010, 5:01 PM

Thank you. Great job.
How would you store the isolated cells and for how long?

3

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Posted by: AnonymousMay 1, 2010, 7:08 AM

These are primary cells and we use them for phenotypic analysis or culture them immediately after isolation.

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Posted by: Bonnie D.June 8, 2010, 5:00 PM

Dear Dr. Ray,

My PI was wondering where you purchased the antibodies used for your figures. Thanks for the demo!
Thanks so much,

-Mike

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Posted by: MikeJune 8, 2010, 11:26 AM

Dear Mike:
The antibodies were obtained from ebioscience and BD Biosciences.
B220 (BD Biosciences); TCR beta (ebioscience); CD5 (BD Biosciences); CD11b (ebioscience); CD23 (ebioscience).
Thanks,

Avijit

4.1

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Posted by: Bonnie D.June 8, 2010, 4:49 PM

Thanks so much!

4.1.1

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Posted by: MikeJune 9, 2010, 4:42 PM

Dear Dr. Ray,

Thank you for this great video!

I am isolating macrophages from the periotoneal cavity the same way you do it. But after a week, when I do Inmunocitochemistry I found Desmin+/ smooth muscle+ cells... and I am wondering why?? other cells could be contaminating my cultures???
May I fail during the wash step and not removing all the non-adherent cells??

Other questions is, how long do this cells live in culture??

I will apreciatte your help!

Diana.

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Posted by: DIANA S.July 12, 2010, 9:38 AM

Dear Dr.Avijit Ray,
My name is Salman Khan and Im PhD course student in South Korea. Currently, Im working on primary culturing of macrophages for the measurment of nitric oxide and PGE2 production in the culture media. For my experiment, I followed all your discribed procedure for the isolation of peritonial macrophages and seeded in 24 well plate, and incubate for two hours in 37C. I treat the cells with my samples and stimulated with LPS (1ug/ml) for 20 h. When, I cheched the nitric oxide concentration (using griess reagent method), but there was no LPS stimulation. would you mind to give me some propoer and nice suggestion??
I will be realy grateful to you.
Thank you so much.

Salman

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Posted by: AnonymousSeptember 14, 2010, 2:54 AM

Dear Mr. Salman Khan:
My suggestion would be to culture cells at a concentration of 1 million cells per ml in 96 well flat-bottom microtiter plate and stimulate them with 5-10 ug/ml LPS for 24h. Post culture centrifuge the samples and collect cell free supernatant. Aliquot 50ul of this supernatant from each sample in a 96 well plate and add equal amount of Griess reagent to each sample. Incubate for 10 min at room temperature and measure absorbance.

Thanks,

Avijit Ray

6.1

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Posted by: Bonnie D.September 14, 2010, 2:50 PM

Dear Dr. Avijit Ray
my name is Jameel, I am a Ph.D student in Jordan, currently I am working on murine peritoneal macrophages for the measurement IL-6, TNF-alpha and IL1 Beta after stimulation with LPS , what is the best LPS concentration to be used and the best cell density / well (96 well plate) and the incubation time. Second question is can I use peritoneal macrophages to measure PIP3 level by ELISA after stimulatin with LPS and with what conditions, thank you

6.1.1

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Posted by: JameelJanuary 3, 2011, 9:21 AM

Dear Dr.Avijit Ray,
My name is Salman Khan and Im PhD course student in South Korea. Currently, Im working on primary culturing of macrophages for the measurment of nitric oxide and PGE2 production in the culture media. For my experiment, I followed all your discribed procedure for the isolation of peritonial macrophages and seeded in 24 well plate, and incubate for two hours in 37C. I treat the cells with my samples and stimulated with LPS (1ug/ml) for 20 h. When, I cheched the nitric oxide concentration (using griess reagent method), but there was no LPS stimulation. would you mind to give me some propoer and nice suggestion??
I will be realy grateful to you.
Thank you so much.

Salman

7

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Posted by: AnonymousSeptember 14, 2010, 4:02 AM

Dear Dr.Avijit Ray,
My name is Salman Khan and Im PhD course student in South Korea. Currently, Im working on primary culturing of macrophages for the measurment of nitric oxide and PGE2 production in the culture media. For my experiment, I followed all your discribed procedure for the isolation of peritonial macrophages and seeded in 24 well plate, and incubate for two hours in 37C. I treat the cells with my samples and stimulated with LPS (1ug/ml) for 20 h. When, I cheched the nitric oxide concentration (using griess reagent method), but there was no LPS stimulation. would you mind to give me some propoer and nice suggestion??
I will be realy grateful to you.
Thank you so much.

Salman

8

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Posted by: AnonymousSeptember 14, 2010, 5:02 AM

Dr.Ray,
Thank for you nice suggestion previously.
Now my question is??
After 2 h incubation of primary cells in 24 well plate I treated with my sample and incubate for 2h. Then, stimulated with 10 ug/ml LPS for 20h, and 20h and 24h. I determined NO assay after 20 h, and 24h incubations after LPS stimulation, but, no stimulation with LPS were observed. While I used DMEM media and balb c mouse.
Would you mind to give me proper suggestion in order to proceed my experiments?
Thank you so much.
Salman

9

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Posted by: Salman KhanSeptember 22, 2010, 5:29 AM

First of all, Balc mice are much less responsive to LPS than C57B6. Second, 10 ug/mL LPS is a VERY high concentration, and 20 hr is a VERY long stimulation. In my hand, I can get a very robust response with 1 ng/mL LPS. In term of serected cytokine levels, black 6 macrophage secreted 3 times more than Balbc ones. I would suggest you try to run a time course first to determine the optimal time point for medium collection.

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Posted by: Zhifei S.September 22, 2012, 11:53 PM

Dear Dr. Ray,

My name is Branislav and I am a PhD student working
in an immunology lab in Jena, Germany. We are also focused
on different B cells populations including B1 cells and Marginal zone B cells.
My current aim is to perform a peritoneal B cell transfer from one mouse to another,
and for this I would like to use magnetic negative selection, depletion of all non-B cells
in the peritoneal wash. What markers would you use to effectively remove all T cells and macrophages
from the peritoneal exudate? I guess TCRab would be enough for T cells? And what about periotoneal macrophages,
do they have any specific markers, different from B1 cells?

Thank you very much in advance,
I am looking forward to your answer.
Best regards,

Branislav
Fritz Lipmann Institute
Jena, Germany

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Posted by: Branislav K.October 28, 2010, 5:00 PM

Dear Dr. Ray, it is a wonderful presentation. Thank you very much indeed. I am working in Mexico City. I want to isolate peritoneal macrophages and know how many type 2 and typ2 macrophages I have after producing surgical peritoneal adhesion (time course after surgery). I would like to know if I can also take some of the aspirated liquid to measure interleukins 1, 6 and 10 (same animal). May I measure interleukins in the centrifuge supernatant? can I do immunohistochemistry of the isolated macrophages? Thank you very much and please receive my best regards from Mexico

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Posted by: Cleva VillanuevaNovember 2, 2010, 2:38 PM

Hi, do you have a similar video for isolation of primary sinovial fibroblasts from mouse joints ??!!

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Posted by: AnonymousDecember 4, 2010, 7:07 AM

I am sorry, but we do not have a prootcol for the isolation of joint fibroblasts.

12.1

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Posted by: AnonymousDecember 6, 2010, 10:42 AM

Dear Dr. Ray, I want to isolate mouse peritoneal macrophages to check some signaling pathway. Can you tell me how to make 3% brewer thioglycollate medium?? what is its solvent?? Waitng for kind reply.

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Posted by: Md. Jamal UddinApril 19, 2011, 10:31 PM

Dear Jamal,

You can follow the method as mentioned in ref # 7.

Thanks,

Avijit

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Posted by: Avijit RayJune 19, 2011, 5:05 PM

Dear Dr. Ray,

Thank you for this great video!
We previously make it in dd water after boiling and autoclave. But the peritoneal macrophage cells are conglobated. I'm not sure whether we had something wrong in making the 3% (w/v) Brewer thioglycollate medium. Do you have any suggestions for us?

Thank you very much!

Ivy

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Posted by: IvyJune 13, 2011, 4:19 AM

Dear Ivy,

Dissolve thioglycollate medium in DD water and autoclave it.
It is not uncommon to have some globular macrophages. Did you check by flow cytometric staining whether the conglobated cells as obtained by you are macrophages? You may get some neutrophils and lymphocytes depending on the time between thioglycollate injection and collection of cells. Collect PerC cells 3-4 days after thioglycollate injection to obtain optimal yield of macrophages.

Thanks,

Avijit

14.1

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Posted by: Avijit RayJune 19, 2011, 5:48 PM

Hello, all!
I am very new in this field, and please tell me
1. Why it takes 3-5 days after injection thioglycollate medium? May I collect peritoneal fluid directly after injection thioglycollate medium same as PBS?
2. What does the mean "macrophages obtained by this procedure differ in some of their physiological properties."?

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Posted by: dashaJune 17, 2011, 2:12 AM

Dear Dasha,

Thioglycollate medium is not used for collecting cells unlike PBS. It is used to elicit macrophages to obtain better yield and 3-4 days is the optimal time. You can collect peritoneal macrophages without using thioglycollate. Only the yield will be less.
Check ref # 7 for altered macrophage properties using thioglycollate.

Thanks,

Avijit

15.1

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Posted by: Avijit RayJune 19, 2011, 5:57 PM

hello!!
can we use 1%starch instead of thioglycollate?? if ;yes which one is preferable?/

16

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Posted by: Meena KusiJuly 19, 2011, 5:48 AM

Hi,

Starch can be used but I prefer thioglycollate.

Thanks,

Avijit

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Posted by: Avijit RayJuly 19, 2011, 10:28 AM

Hi,

Great video! How long can we keep these cells in culture for, and how often do you feed/passage them?

Thanks,

Stefanny

18

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Posted by: stefannySeptember 14, 2011, 3:50 PM

Hi Stefanny,

The macrophages can be can be kept in culture using medium containing colony stimulating factors (CSFs). Media should be changed depending on the viability of the cells. Without CSFs the cells can be cultured for 48-72 hrs.

Thanks,

Avijit

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Posted by: Avijit RaySeptember 18, 2011, 3:52 PM

Respected Sir,
I am Kiran Kundu. Now I am a project assistant at National Brain Research Centre, India. I am working upon Japanese Encephalitis using peritoneal macrophage. But during isolation of peritoneal macrophage from 3 to 4 weeks mice yield or number of cells is very low.So I want your suggestion to get a good result.
Yours Obediently
Kiran Kundu

19

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Posted by: Kiran K.February 8, 2012, 11:50 AM

Dear Kiran,

Macrophage yeild from peritoneal cavity varies with mouse strain, age and sex. You may obtain more cells using 6-8 weeks old mice. Perform steps 4-6 twice and try to collect most of the fluid from the peritoneal cavity.

Thanks,

Avijit

19.1

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Posted by: Avijit RayFebruary 19, 2012, 1:20 PM

Dear Dr. Avijit
I am researching on macrophages are obtained from peritoneal cavity in mouse. According to your presentation, I have some question;
Can I mix 3-5 fluid together and make a pool of them?
Can I use CD14 for detecting of macrophages of mouse; I mean CD 14 is specific to human?
Can I treated on mouse in vivo and investigate morphology and immunology parameter in vitro? i mean they may keep their changes in vitro as clear as in vivo?
How can I stain them? Which of these? Trypan Blue or Giemsa or Hematoxylin?
Sincerely
Latifeh,IRAN

20

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Posted by: latifehFebruary 19, 2012, 8:56 AM

Dear Latifeh,

Do you mean mixing cells from 3-5 mice? If so, depending on your experimental design you can.
Mouse cells express CD14. I would suggest using CD14 in combination with CD11b and B220 (to gate out B cells) for the detection of peritoneal cavity macrophages.
You can treat mice in vivo and isolate PerC macrophages to study immune parameters depending on your experimental design.
Use Trypan blue to determine cell viability and use Wright-Giemsa staining for morphological studies.

Thanks,

Avijit

20.1

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Posted by: Avijit RayFebruary 19, 2012, 1:48 PM

Is it possible to lyse the red blood cells in your cell preparation if you do get some contamination? I use ACK lysis buffer when isolating spleen cells for this same purpose. Thank you for your video and helpful advice!

21

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Posted by: MorrisMarch 1, 2012, 4:37 PM

Dear Morris,

It is possible to lyse RBCs using ACK lysis buffer, but you cant get rid of the contaminating WBCs and you will obtain a mixed population of cells from peritoneal cavity and blood.

Thanks,

Avijit

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Posted by: Avijit RayMarch 2, 2012, 5:51 PM

Dear Dr. Avijit
how can i get rid of the contaminating WBCs?

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Posted by: latifehMarch 7, 2012, 5:08 AM

Dear Latifeh,

You can't get rid of the contaminating blood WBCs. If pure PerC cell population is required discard any sample that is contaminated with blood.

Thanks,

Avijit

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Posted by: Avijit RayMarch 7, 2012, 11:37 AM

Dear Dr. Ray,

I am isolating macrophages from the periotoneal cavity the same way you do it. I have put cell 2 hours in incubator and washed with PBS. When I saw plate, many cells were attached to plate. Then I centrifuged at 1700 rpm 10 min, but I almost could not get pellet...pellet was very less and on the wall only...Please tell me what I did wrong?


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Posted by: dashaMarch 27, 2012, 4:51 AM

Dear Dasha,

Post incubation, discard the non-adherent cells and gently wash the petri dish with PBS (PBS should be at room temperature). Harvest the adhered cells from the petri dish using a cell scraper and cold PBS. Repeat the process once and centrifuge the collected cells in a polypropylene tube.

Thanks,

Avijit

25

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Posted by: Avijit RayMarch 27, 2012, 4:39 PM

Dear Dr.Ray,

Thanks for the great video. Should the isolation of peritoneal cells be done in sterile condition (i.e. laminar hood)? Thanks.

26

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Posted by: shien l.February 26, 2013, 8:59 AM

Hi Shien,

If you want to use the isolated peritoneal cavity cells for in vitro cell culture, the procedure should be performed under sterile conditions.

Thanks,

Avijit

26.1

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Posted by: AnonymousFebruary 28, 2013, 1:02 PM

Dear Dr.Ray,

Thanks for helping me to improve my mouse peritoneal macrophages isolation.
I have an issue that i would like to discuss with you.

1)Do you simply distinguish the different cell populations by adherence? Is it trustable that B and T cells do not adhere to the plates?

2)Can you distinguish between the different macrophage populations, that is, do you know if is possible to assess which type of macrophage is present? I know there are CD markers characteristic of each macrophage, but i read that they are not specific..

Thank you very much!
Sincerely

27

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Posted by: Inês S.March 20, 2013, 9:18 AM

An enriched macrophage population (90-95%) is obtained by adherence to petri dishes, which can be further sorted to attain a higher purity.

You can use CD markers to distinguish the different macrophage populations.

Thanks,

Avijit

27.1

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Posted by: AnonymousApril 1, 2013, 2:11 PM

An enriched macrophage population (90-95%) is obtained by adherence to petri dishes, which can further sorted to attain a higher purity.

You can use CD markers to distinguish the different macrophage populations.

Thanks,

Avijit

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Posted by: AnonymousApril 1, 2013, 2:03 PM

Dear Dr Ray,

When i isolate peritoneal macrophages, i immediately plaque 200x10^3 cells, but it is a bit difficult to distinguish and therefore count macrophages at microscope. On microscope i observe two different populations: big and small spheres. I consider that the big spheres are macrophages. So, only after count the cells and plaque them, i am able to observe their adherence. My doubt on this procedure is, how can i ensure that the cells i am counting are macrophages? I know that after 1 day, they adhere to the plaque, but the number may not be right.

Thank you very much!

29

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Posted by: Inês S.April 2, 2013, 5:38 AM

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