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 JoVE Immunology and Infection

Isolatie van Mouse buikholte Cellen

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BloodCenter of Wisconsin, Blood Research Institute

 

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Cite this Article: Isolatie van Mouse buikholte Cellen

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

Abstract: Isolatie van Mouse buikholte Cellen

De peritoneale holte is een membraan-gebonden en met vloeistof gevulde buikholte van zoogdieren, die de lever, de milt, het grootste deel van het maag-darmkanaal en andere ingewanden bevat. Het herbergt een aantal van de immuuncellen waaronder macrofagen, B-cellen en T-cellen. De aanwezigheid van een groot aantal naïeve macrofagen in de buikholte is het een te verkiezen plaats voor het verzamelen van naïeve weefsel inwoner macrofagen (1). De peritoneale holte is ook belangrijk voor de studie van B-cellen als gevolg van de aanwezigheid van een unieke buikholte-ingezeten B-cel subset bekend als B1 cellen in aanvulling op de conventionele B2 cellen. B1-cellen worden onderverdeeld in B1a en B1b cellen, die kunnen worden onderscheiden door de oppervlakte-expressie van CD11b en CD5. B1-cellen zijn een belangrijke bron van natuurlijke IgM vroegtijdig bescherming tegen een groot aantal pathogenen (2-4). Deze cellen zijn autoreactieve in de natuur (5), maar hoe ze worden gecontroleerd tot autoimmuniteit te voorkomen, is nog niet geheel duidelijk. Integendeel, CD5

Protocol: Isolatie van Mouse buikholte Cellen

  1. Voordat u begint met het proces, de volgende items dienen te worden om verzameld en voorbereid:
    • Ijs
    • 5ml spuit met 27g naald
    • 5ml spuit met 25g naald
    • Styrofoam blok en pinnen voor het monteren van de muis
    • Lade waarop de montage blok kan worden geplaatst
    • Schaar en pincet
    • Verzameling buizen
    • 70% ethanol
    • PBS met 3% foetaal kalf serum (FCS) (Pre gekoeld en bewaard op ijs)
  2. Euthanaseren van de muis, spray met 70% ethanol en monteer het op het piepschuim blok op zijn rug.
  3. Met behulp van een schaar en pincet snijd de buitenste schil van het buikvlies en voorzichtig terug te trekken naar de binnenste huid aan de binnenkant van de buikholte bloot te leggen.
  4. Injecteer 5 ml ijskoude PBS (met 3% FCS) in de buikholte met behulp van een 27g naald. Langzaam duw de naald in het buikvlies dat evenwel niet tot doorboren alle organen.
  5. Na injectie, zachtjes masseren het buikvlies naar alle aangesloten cellen in het PBS-oplossing te verwijderen.
  6. Plaats een 25 g naald, schuine rand op, gekoppeld aan een 5 ml spuit in het buikvlies en het verzamelen van de vloeistof tijdens het verplaatsen van de punt van de naald voorzichtig om te voorkomen dat verstopt raakt door het vetweefsel of andere organen. Verzamel zoveel mogelijk vocht en breng de verzamelde celsuspensie in buisjes op ijs bewaard na het verwijderen van de naald van de spuit.
    Optioneel: Herhaal stap 4-6
  7. Maak een incisie in de binnenste huid van het buikvlies en terwijl de huid met een pincet te gebruiken een plastic Pasteur pipet om de resterende vloeistof te verzamelen uit de holte.
  8. Als in stap 6 of 7 zichtbaar besmet bloed wordt gedetecteerd dan het verontreinigde monster moet worden weggegooid.
  9. Spin van de verzamelde celsuspensie bij 1500 rpm gedurende 8 minuten, gooi het supernatant en resuspendeer de cellen in de gewenste media of PBS voor het tellen.

Alternatief protocol om thioglycollate verkrijgen opgewekt macrofagen:

Deze methode wordt gebruikt om een ​​hogere opbrengst van macrofagen te verkrijgen.

  1. Injecteer 5 ml van 3% (w / v) Brewer thioglycollate medium (7) in de buikholte van elke muis.
  2. Wacht op 3-5 dagen, en ga verder met een vorige stap voor het verzamelen van de cellen.

Vergeleken met de nonelicited aanpak, kan ongeveer 10 keer meer macrofagen worden verzameld. De enige zorg is dat macrofagen verkregen door deze procedure verschillen in sommige van hun fysiologische eigenschappen.

Representatieve resultaten:

Uit een ongemanipuleerde muis, kan 5-10 miljoen buikholte cellen worden verkregen met een goede isolatie protocol. Van alle levende cellen, 50-60% zijn B-cellen, ~ 30% macrofagen en 5-10% zijn T-cellen (Fig 1).

Figuur 1
Figuur 1. Fenotype van cellen geïsoleerd uit de buikholte. Na afsluiting van de buikholte cellen ze werden gekleurd met anti-muis TCRβ-FITC, B220-PE-Texas rood, CD11b-Stille Oceaan blauw, CD23-PE-Cy7 en CD5-APC. Vertegenwoordiger van flowcytometrische plots tonen percentages van B-en T-cellen (een), macrofagen (b), B1 en B2 cellen (c) en B1a en B1b cellen (d).

Discussion: Isolatie van Mouse buikholte Cellen

Isolatie van peritoneale holte cellen is een belangrijke techniek voor de studie van verschillende immuuncellen, voornamelijk macrofagen en specifieke B-cel subsets. Hoewel dit een eenvoudig proces, zijn er een aantal betrokken kritische stappen. Aanwezigheid van contaminerende bloed in de verzamelde monster moet worden vermeden om een ​​pure buikholte celpopulatie te verkrijgen. Euthanasie door cervicale dislocatie moet zorgvuldig worden gedaan om besmet bloed in de buikholte te vermijden. Als alternatief CO 2 kan worden gebruikt. Daarnaast moet tijdens de procedure goede zorg worden genomen om te voorkomen dat aanprikken van de blaas of enige andere organen in de buikholte. Herstellen de meeste van de geïnjecteerde vloeistof is ook belangrijk om de cel te geven.

Deze procedure wordt op grote schaal gebruikt om de macrofagen biologie, omdat matige aantallen inwoner studie, kunnen niet-gestimuleerde macrofagen gemakkelijk verkregen worden uit de buikholte, in tegenstelling tot de moeizame taak van het onderscheid myeloïde voorlopercellen cellen in volwassen macrofagen in vitro, met behulp van macrofaag kolonie stimulerende factor (8 , 9). De macrofaag opbrengst van de buikholte kan worden verbeterd door gebruik te maken van de thioglycollate elicitatie methode, hoewel thioglycollate gebruik kunnen veranderen fysiologische eigenschappen van de macrofagen (7).

B-cellen zijn een belangrijk onderdeel van ons immuunsysteem speelt cruciale rol in zowel de aangeboren en adaptieve immuniteit. Tussen de verschillende B-cel subpopulaties, B1 cellen bestaan ​​uit een unieke deelgroep van B-cellen die betrokken zijn bij aangeboren immuniteit, auto-immuniteit en immuunregulatie. B1 cellen zijn voornamelijk gelegen in de buikholte en zijn zelf aanvullen. Ze zijn een van de primaire producenten van natuurlijke IgM waarvan de eerste regel van de bescherming tegen een aantal virussen en bacteriën (10-12) biedt. B1-cellen zijn ook een belangrijke bron van IL-10 (6), dat is een belangrijk cytokine die betrokken zijn bij immuun regelgeving. Hoewel verschillende studies zijn gevoerd met de B1 cellen, er nog steeds ruimte is voor verdere evaluatie van hun contrasterende functies, in het bijzonder hun regulerende rol. Buikholte celisolatie methode biedt de unieke mogelijkheid om de functies van de B1 cellen te bestuderen.

Disclosures: Isolatie van Mouse buikholte Cellen

Acknowledgements: Isolatie van Mouse buikholte Cellen

Dit werk werd mede ondersteund door de NIH subsidie ​​AI069358 en de BloodCenter Research Foundation.

Materials: Isolatie van Mouse buikholte Cellen

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

References: Isolatie van Mouse buikholte Cellen

  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: Isolatie van Mouse buikholte Cellen

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

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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.

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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

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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

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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

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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.

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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

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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

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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?/

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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

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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

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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.

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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!

29

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

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