StemXVivo Methylcellulose Concentrate
R&D Systems, part of Bio-Techne | Catalog # HSC011
Key Product Details
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Human Hematopoietic Colony Formation Using the Methylcellulose-based Colony Forming Cell Assay. Colony forming unit-erythroid (CFU-E) are clonogenic progenitors that produce only one or two clusters with each cluster containing from 8 to approximately 100 hemoglobinized erythroblasts. It represents the more mature erythroid progenitors that have less proliferative capacity.B. Colony forming unit-granulocyte (CFU-G) are clonogenic progenitors of granulocytes that give rise to a homogeneous population of eosinophils, basophils, or neutrophils.C. Colony forming unit-granulocyte, macrophage (CFU-GM) are progenitors that give rise to colonies containing a heterogeneous population of macrophages and granulocytes. The morphology is similar to the CFU-M and CFU-G descriptions.D. Burst forming unit-erythroid (BFU-E) colonies can be described as small (3 to 8 clusters), intermediate (9 to 16 clusters), or large (more than 16 clusters) according to the number of clusters present. These are primitive erythroid progenitors that have high proliferative capacity.E. Colony forming unit-macrophage (CFU-M) are clonogenic progenitors of macrophages that give rise to a homogenous population of macrophages.F. Colony forming unit-granulocyte, erythrocyte, macrophage, megakaryocyte (CFU-GEMM) are multi-lineage progenitors that give rise to erythroid, granulocyte, macrophage and megakaryocyte lineages, as the name indicates. |
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Mouse Hematopoietic Colony Formation Using the Methylcellulose-based Colony Forming Cell Assay. Burst forming unit-erythroid (BFU-E) colonies are defined as clusters with a minimal of 30 cells that can be seen from day 7 onward. Each individual cluster consisted of tiny, irregular shaped cells that may appear fused together. Each cluster normally contains 5 - 8 cells, and the size of the cluster is similar to that of a single macrophage. The cluster may vary in sizes and color. A large BFU-E is usually bright red and is differentiable even without the use of a microscope. Smaller BFU-E may not appear red in color but is distinguishable based on the morphology.B. Colony forming unit-macrophage (CFU-M; left) are clonogenic progenitors of macrophages that give rise to a homogenous population of macrophages. Colony forming unit-granulocyte (CFU-G; right) are clonogenic progenitors of granulocytes that give rise to a homogeneous population of eosinophils, basophils, or neutrophils.C. Colony forming unit-granulocyte, macrophage (CFU-GM) are progenitors that give rise to colonies containing a heterogeneous population of macrophages and granulocytes. The morphology is similar to the CFU-M and CFU-G descriptions.D.Colony forming unit-granulocyte, erythrocyte, macrophage, megakaryocyte (CFU-GEMM) are multi-lineage progenitors that give rise to the lineage of erythroid, granulocytes, macrophages, and megakaryocytes as the name indicates. It can be identified as reddish colored cells (erythroid) mixed with colorless cells (granulocytes, macrophages, and megakaryocytes) in a single colony. This progenitor is typically the largest colony on the culture dish; occasionally CFU-GM may attain a size comparable or larger than that of CFU-GEMM. |
Assay Procedure
Refer to the product datasheet for complete product details.
Briefly, Methylcellulose Stock Solution is used in the Colony Forming Cell Assay using the following procedure:
- Prepare human mononuclear cells or mouse/rat bone marrow cells
- Add cells and desired supplements to Methylcellulose Stock Solution
- Plate and incubate cells
- Identify and count colonies
Reagent supplied in the StemXVivo® Methylcellulose Concentrate (Catalog # HSC011):
- 50 mL of 2.8% Methylcellulose (1500 cps) in water.
| Contents | Concentration |
| Methylcellulose (1500 cps) in water | 2.8% |
Reagents
- Cells derived from bone marrow, blood, or enriched CD34+ cells
- Iscove’s Modified Dulbecco’s Media (IMDM)
- Ca2+/Mg2+-Free Hank’s Balanced Salt Solution (HBSS)
- Ficoll-Paque™ PLUS (GE Healthcare) or equivalent
Materials
- 100 mm culture plates
- 35 mm culture plates
- 15 mL centrifuge tubes
- 50 mL centrifuge tubes
- 10 mL syringes
- 3 mL syringes
- 5 mL vials
- 16 gauge 1½ inch needle
- 14 gauge laboratory pipetting needle
- Heparinized syringes or Vacutainers®
- Serological pipettes
- Pipettes and pipette tips
Equipment
- 37 °C and CO2 humidified incubator
- Centrifuge
- Vortex mixer
- Hemocytometer
- Inverted Microscope
Reagents
- Cells derived from mouse bone marrow, spleen, peripheral blood, or fetal liver. Mice are routinely used between 6 - 12 weeks.
- Iscove's Modified Dulbecco’s Media (IMDM)
- Fetal Bovine Serum
- IMDM/2% Fetal Bovine Serum
- (Optional) Flow Cytometry Mouse Lyse Buffer (Catalog # FC003)
Materials
- 100 mm culture plates
- 35 mm culture plates
- 15 mL centrifuge tubes
- 10 mL syringes
- 3 mL syringes
- 5 mL vials
- 16 gauge 1½ inch needle
- 14 gauge laboratory pipetting needle
- Serological pipettes
- Pipettes and pipette tips
Equipment
- 37 °C and CO2 humidified incubator
- Centrifuge
- Vortex mixer
- Hemocytometer
- Inverted Microscope
Procedure for the Human Colony Forming Cell Assay
Prepare mononuclear cells by Ficoll-Paque gradient centrifugation.
Wash the cells two times with HBSS and pool the cells.
Centrifuge the cells at 400 x g for 10 minutes.
Thaw aliquots of StemXVivo® Methylcellulose Concentrate at room temperature.
Resuspend mononuclear cells in 10 mL of IMDM.
Perform a cell count.
Transfer the appropriate volume of cells plus a slight excess into a new 15 mL centrifuge tube.
Centrifuge at 300 x g for 10 minutes.
Remove the supernatant.
Resuspend the cells in IMDM to the desired stock cell number to generate a 10X stock concentration.
Combine the appropriate volume of 10X cell stock with the desired cell culture supplements/cytokines, and StemXVivo® Methylcellulose Stock Solution. The final Methylcellulose concentration should be 1.27%.
Vortex the samples vigorously.
Wait approximately 20 minutes to allow air bubbles to escape.
Add 1.1 mL of the cell mixture to a 35 mm culture plate using a 3 mL syringe and a 16 gauge needle.
Spread the media evenly by gently rotating the plate.
Place two 35 mm plates into a 10 cm plate.
Add one uncovered 35 mm plate that contains 3-4 mL of sterile water.
Cover the 10 cm plate and place it in a 37 °C and 5% CO2 incubator.
Incubate the cells for 14-16 days.
Use an inverted microscope and a scoring grid to identify and count individual colonies.
Procedure for the Mouse Colony Forming Cell Assay
Pass a suspension of mouse bone marrow cells through a 70 μm nylon strainer to remove clumps and debris.
Remove red blood cells if necessary.
Wash the cells with IMDM/2% FBS by centrifugation at 300 x g for 8 minutes and pool the cells.
Remove the supernatant.
Resuspend the cells in 10 mL of IMDM/2% FBS.
Thaw aliquots of StemXVivo® Methylcellulose Stock Solution at room temperature for approximately 30 minutes.
Perform a cell count.
Transfer the appropriate volume of cells plus a slight excess into a new 15 mL centrifuge tube.
Centrifuge at 300 x g for 10 minutes.
Remove the supernatant.
Resuspend the cells in IMDM to the desired stock cell number to generate a 10X stock concentration.
Combine the appropriate volume of 10X cell stock with the desired cell culture supplements/cytokines, and StemXVivo® Methylcellulose Stock Solution. The final Methylcellulose concentration should be 1.27%.
Vortex the samples vigorously.
Wait approximately 20 minutes to allow air bubbles to escape.
Add 1.1 mL of the cell mixture to a 35 mm culture plate using a 3 mL syringe and a 16 gauge needle.
Spread the media evenly by gently rotating the plate.
Place two 35 mm plates into a 10 cm plate.
Add one uncovered 35 mm plate that contains 3-4 mL of sterile water.
Cover the 10 cm plate and place it in a 37 °C and 5% CO2 incubator.
Incubate the cells for 8-12 days.
Use an inverted microscope and a scoring grid to identify and count individual colonies.
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