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 JoVE Immunology and Infection

L'isolement des cellules de souris cavité péritonéale

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BloodCenter of Wisconsin, Blood Research Institute

 

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Cite this Article: L'isolement des cellules de souris cavité péritonéale

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

Abstract: L'isolement des cellules de souris cavité péritonéale

La cavité péritonéale est une cavité membranaires et remplis de fluide abdominal de mammifères, qui contient le foie, la rate, la plupart du tractus gastro-intestinal et d'autres viscères. Il abrite un certain nombre de cellules immunitaires, y compris les macrophages, les lymphocytes B et les lymphocytes T. La présence d'un nombre élevé de macrophages naïfs dans la cavité péritonéale en fait un site privilégié pour la collecte des naïfs macrophages résidents du tissu (1). La cavité péritonéale est également important pour l'étude des cellules B en raison de la présence d'une cavité péritonéale unique de sous-résident de cellules B ou cellules B1, en plus de cellules B2 conventionnels. Cellules B1 sont subdivisées en cellules B1a et B1b, qui peut être distingué par l'expression de surface de CD11b et CD5. Cellules B1 sont une source importante d'IgM naturels offrant une protection précoce d'une variété de pathogènes (2-4). Ces cellules sont autoréactifs dans la nature (5), mais comment ils sont contrôlés pour éviter l'auto-immunité n'est pas encore parfaitement compris. Au contraire, CD5

Protocol: L'isolement des cellules de souris cavité péritonéale

  1. Avant de commencer le processus, les éléments suivants doivent être recueillis et préparés à:
    • Glace
    • Seringue de 5 ml avec aiguille 27G
    • Seringue de 5 ml avec aiguille 25g
    • Styrofoam blocs et des épingles pour le montage de la souris
    • Plateau sur lequel le bloc de montage peut être placé
    • Ciseaux et pinces
    • Tubes de prélèvement
    • 70% d'éthanol
    • PBS avec 3% sérum de veau foetal (FCS) (pré refroidis et conservés sur glace)
  2. Euthanasier la souris, le vaporiser avec de l'éthanol 70% et le monter sur le bloc de styromousse sur le dos.
  3. En utilisant une paire de ciseaux et des pinces à couper la peau externe du péritoine et tirez en arrière pour exposer la peau intérieure tapissant la cavité péritonéale.
  4. Injecter 5 ml de PBS glacé (avec 3% de FCS) dans la cavité péritonéale à l'aide d'une aiguille 27G. Poussez l'aiguille lentement dans le péritoine en faisant attention à ne pas percer tous les organes.
  5. Après l'injection, masser doucement le péritoine pour déloger les cellules attachées dans la solution PBS.
  6. Insérer une aiguille de 25 g, biseau vers le haut, attachée à une seringue de 5 ml dans le péritoine et recueillir le liquide tout en déplaçant la pointe de l'aiguille doucement pour éviter le colmatage par le tissu adipeux ou d'autres organes. Recueillir autant de liquide que possible et le dépôt de la suspension cellulaire recueilli dans des tubes conservés sur la glace après avoir retiré l'aiguille de la seringue.
    En option: 4-6 Répétez l'étape
  7. Faire une incision dans la peau intérieure du péritoine et tout en maintenant la peau avec une pince utiliser une pipette Pasteur en plastique pour recueillir le liquide restant dans la cavité.
  8. Si à l'étape 6 ou 7 contamination du sang visible est détectée, alors l'échantillon contaminé doit être jeté.
  9. Faites tourner la suspension de cellules recueillies à 1500 RPM pendant 8 minutes, éliminer le surnageant et remettre en suspension les cellules dans les médias souhaités ou PBS pour le comptage.

Protocole alternatif pour obtenir thioglycolate suscité des macrophages:

Cette méthode est utilisée pour obtenir un rendement plus élevé des macrophages.

  1. Injecter 5 ml de 3% (p / v) Brewer milieu au thioglycolate (7) dans la cavité péritonéale de chaque souris.
  2. Attendre pendant 3-5 jours, et passez à l'étape 1 ci-dessus pour la collecte des cellules.

Comparativement à l'approche nonelicited, environ 10 fois plus de macrophages peuvent être collectées. Le seul souci est que les macrophages obtenus par cette procédure diffèrent dans certaines de leurs propriétés physiologiques.

Les résultats représentatifs:

De une souris non manipulée, 5-10 millions de cellules cavité péritonéale peut être obtenue avec un protocole de bonne isolation. Parmi toutes les cellules vivantes, 50-60% sont des cellules B, macrophages ~ 30% et 5-10% sont des cellules T (figure 1).

Figure 1
Figure 1. Phénotype des cellules isolées de la cavité péritonéale. Isolement de cellules Après la cavité péritonéale, ils ont été colorés avec anti-souris-FITC TCRβ, B220-PE-rouge Texas, CD11b-Pacifique bleu, CD23-PE-Cy7 et CD5-APC. Parcelles de flux représentant cytométrie montrent des pourcentages de cellules B et T (a), les macrophages (b), B1 et B2 cellules (c) et les cellules B1a et B1b (d).

Discussion: L'isolement des cellules de souris cavité péritonéale

Isolement de cellules cavité péritonéale est une technique importante pour l'étude des différentes cellules du système immunitaire, principalement les macrophages et les sous-ensembles spécifiques de cellules B. Bien que ce processus est simple, il ya quelques étapes essentielles impliquées. Présence de contamination du sang dans l'échantillon prélevé doit être évitée afin d'obtenir un pur population cellulaire péritonéale cavité. L'euthanasie par dislocation cervicale doit être effectuée avec soin pour éviter toute contamination du sang dans la cavité péritonéale. Alternativement CO 2 peuvent être utilisés. En outre, pendant les soins procédure appropriée devrait être prise pour éviter la perforation de la vessie ou d'autres organes dans la cavité péritonéale. Récupérer la plupart du liquide injecté est également important pour le rendement cellulaire.

Cette procédure est largement utilisée pour étudier la biologie des macrophages, depuis un nombre modéré de résident, les macrophages non stimulés peuvent facilement être obtenus à partir de la cavité péritonéale, contrairement à la tâche laborieuse de différenciation des cellules progénitrices myéloïdes en macrophages matures in vitro, en utilisant le facteur de croissance macrophages (8 , 9). Le rendement des macrophages de la cavité péritonéale peut être améliorée en utilisant la méthode de l'élicitation thioglycolate, bien que l'utilisation thioglycolate pourraient altérer les propriétés physiologiques des macrophages (7).

Les cellules B sont une partie importante de notre système immunitaire joue un rôle crucial dans les deux immunité innée et adaptative. Parmi les différentes sous-populations de cellules B, les cellules B1 comprend un sous-ensemble unique de cellules B impliquées dans l'immunité innée, l'auto-immunité et de la régulation immunitaire. Cellules B1 sont principalement situés dans la cavité péritonéale et sont la reconstitution de soi. Ils sont l'un des principaux producteurs d'IgM naturel qui assure la première ligne de protection contre un certain nombre de virus et de bactéries (10-12). Cellules B1 sont aussi une source importante d'IL-10 (6), qui est une cytokine importante impliquée dans la régulation immunitaire. Bien que plusieurs études ont été menées avec les cellules B1, encore il ya place pour une évaluation plus poussée de leurs fonctions contrastées, spécialement leur rôle de régulation. Péritonéale méthode d'isolement cavité cellulaire offre l'opportunité unique d'étudier les fonctions des cellules B1.

Disclosures: L'isolement des cellules de souris cavité péritonéale

Acknowledgements: L'isolement des cellules de souris cavité péritonéale

Ce travail a été soutenu en partie par NIH AI069358 et la Fondation de recherche BloodCenter.

Materials: L'isolement des cellules de souris cavité péritonéale

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

References: L'isolement des cellules de souris cavité péritonéale

  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: L'isolement des cellules de souris cavité péritonéale

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?

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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.

3.1

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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

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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 ??!!

12

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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."?

15

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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

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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

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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

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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!

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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

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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

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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

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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

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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!

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

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