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Method Article
This protocol describes a procedure for serial sampling of femoral bone marrow (BM) without requiring the sacrifice of mice. This procedure facilitates longitudinal studies of the BM composition of mice over time and provides serial access to cells within the BM for ex vivo and transplantation studies.
Serial sampling of the cellular composition of bone marrow (BM) is a routine procedure critical to clinical hematology. This protocol describes a detailed step-by-step technical procedure for an analogous procedure in live mice which allows for serial characterization of cells present in the BM. This procedure facilitates studies aimed to detect the presence of exogenously administered cells within the BM of mice as would be done in xenograft studies for instance. Moreover, this procedure allows for the retrieval and characterization of cells enriched in the BM such as hematopoietic stem and progenitor cells (HSPCs) without sacrifice of mice. Given that the cellular composition of peripheral blood is not necessarily reflective of proportions and types of stem and progenitor cells present in the marrow, procedures which provide access to this compartment without requiring termination of the mice are very helpful. The use of femoral bone marrow aspiration is illustrated here for cytological analysis of marrow cells, flow cytometric characterization of the hematopoietic stem/progenitor compartment, and culture of sorted HSPCs obtained by femoral BM aspiration compared with conventional marrow harvest.
All blood cells are derived from hematopoietic stem cells (HSCs). Procedures which allow access to the bone marrow (BM), the site of the vast majority of HSC’s in mice and men, without requiring sacrifice of animals, provide a resource to monitor the source of hematopoiesis serially. The overall goal of the procedure described here is to provide a detailed protocol for the sampling of BM cells from the femur of live mice which provides material representative of the cells which would be retrieved by conventional harvest of BM cells through sacrifice of the mice. The advantage of this procedure over conventional harvest of BM cells is that this procedure does not require the sacrifice of mice and therefore allows for longitudinal study of the bone marrow compartment of mice over time.
Although this murine bone marrow aspiration procedure has been used in a number of studies and described previously (see Sundberg et al. for a historical review1), formal step-by-step procedures illustrating this technique have not been previously published. This protocol enables routine serial sampling of the BM for purposes such as assessing engraftment in the BM of cells exogenously introduced into the mouse (as would be done in xenograft studies for instance2,3), analysis of chimerism in the BM for comparison with that of the peripheral blood (where results are not necessarily congruent), monitoring the abundance of specific cell types normally enriched in the marrow such as hematopoietic stem and progenitor cells, and retrieval of BM cells for ex vivo culture and/or transplantation. In addition, evaluation of marrow contents may be very useful in murine models of hematological disease as aspiration is helpful in assessing hematological disease burden at time points when disease may not be evident in the peripheral blood3-5. Moreover, this technique may be used to evaluate response of hematologic disease in the marrow to drugs administered in therapeutic studies. Thus, the procedure described here is ideal for investigators wishing to obtain access to bone marrow hematopoietic cells from mice for cytological analysis, flow cytometric analysis, in vitro culturing, and/or in vivo transplantation studies without requiring sacrifice or harm to the mice.
The protocol for sampling of BM described here is quite similar to the technique used for intra-femoral injection of material directly into the marrow cavity3,6. The key difference being that this protocol details the procedure for removal of cells from the marrow as opposed to instilling material directly into the marrow cavity space as is done with intrafemoral injection.
Toutes les procédures d'animaux décrits dans le présent protocole ont été menées en conformité avec les lignes directrices pour les soins et l'utilisation des animaux de laboratoire et ont été approuvés par le soin et l'utilisation des animaux Commission institutionnelle (IACUC) au Memorial Sloan-Kettering Cancer Center.
1. D'aspiration de la moelle osseuse (BM) Les cellules de la cuisse
2. L'évaluation de contenu cellulaire dans les cellules aspiration BM
Fémorale BM aspiration d'une souris C57/B6 direct a été utilisé pour obtenir des cellules mononucléées BM suivie par la récolte de la BM conventionnel de la même souris, après sacrifice. Cellules mononucléaires BM obtenus par les deux méthodes ont ensuite été analysées par (1) l'analyse cytologique des cellules de MO, (2) la détermination de la fréquence relative des cellules souches / progénitrices hématopoïétiques (HSPCs), et (3) la culture ex vivo de HSPCs triées. Dans l'exp?...
Serial aspiration BM est une procédure de routine critique à l'investigation clinique des troubles hématologiques chez les humains. La possibilité d'effectuer un échantillonnage de série analogue de BM dans les souris pour la caractérisation de la composition cellulaire et constituants de BM à travers de longues expériences est également très précieux. Cette procédure est utile pour la caractérisation de HSPC, sans sacrifier de la souris, mais également pour la détection de la présence de types ...
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O.A.-W. is supported by an NIH K08 Clinical Investigator Award (1K08CA160647-01), a U.S. Department of Defense Postdoctoral Fellow Award in Bone Marrow Failure Research (W81XWH-12-1-0041), the Josie Roberston Investigator Program, and a Damon Runyon Clinical Investigator Award with Support from the Evan’s Foundation.
Name | Company | Catalog Number | Comments |
PBS | PAA | H15-002 | |
Bovine serum albumin | PAA | K41-001 | |
ACK lysis buffer | Homemade | in 1 L. Adjust pH 7.2 ~ 7.4 and filter sterile with 0.22 μm vacuum filter. | |
8.3 g Ammonium chloride | Fisher Scientific | A661-500 | |
1 g Potassium bicarbonate | Fisher Scientific | P184-500 | |
200 μl 0.5 M EDTA pH 8 | Gibco | 15575-038 | |
RPMI 1640 | PAA | E15-842 | |
0.5 ml Tuberculin syringe 27.5 G | Becton Dickinson | 305620 | |
Sterile cell strainer 70 μm | Fisher Scientific | 22363548 | |
Isoflurane, USP | Attane | NDC:66794-014-25 | |
Blunt-end needle | Stemcell Technologies | 28110 | |
PrecisionGlide needle 23 G | Becton Dickinson | 305193 | |
3 ml Syringe Luer-Lok tip | Becton Dickinson | 309657 | |
Non-tissue culture treated plate, 6 Well | Becton Dickinson | 351146 | |
12 x 75 mm 5 ml tubes | Becton Dickinson | 352054 | FACS staining |
12 x 75 mm 5 ml tubes with cell-strainer cap | Becton Dickinson | 352235 | FACS staining |
NK1.1 APC-Cy7 | Biolegend | 108723 | |
CD11b APC-Cy7 | Biolegend | 101225 | |
CD45R (B220) APC-Cy7 | Biolegend | 103223 | |
CD3 APC-Cy7 | Biolegend | 100222 | |
Ly-6G and Ly-6C (Gr-1) APC-Cy7 | Biolegend | 108423 | |
Ter119 APC-Cy7 | Biolegend | 116223 | |
CD19 APC-Cy7 | Biolegend | 302217 | |
CD4 APC-Cy7 | BioLegend | 317417 | |
CD117 (c-KIT) PE | BioLegend | 105808 | |
Ly-6A/E (Sca-1) PE-Cy7 | Biolegend | 122513 | |
CD34 APC | Biolegend | 128612 | |
CD16/32 e450 | eBioscience | 48-0161-82 | |
DAPI (4′,6-Diamidino-2-phenylindole dihydrochloride) | Sigma-Aldrich | 32670 | |
MethoCult GF M3434 | STEMCELLTECHNOLOGIES | 3434 | For methocellulose culture |
Carprofen | Crescent Chemical Company | C11045850 | 1 dose (5mg/kg) |
Flow cytometer, LSRFortessa | Becton Dickinson | ||
Puralube vet ointment (sterile petrolatum ophthalmic ointment) | Dechra-US | 17033-211-38 |
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