| BCRJ Code | 0428 |
| Cell Line | Hs-5 |
| Species | Homo sapiens |
| Vulgar Name | Human |
| Tissue | Bone Marrow/Stroma |
| Morphology | Fibroblast |
| Disease | Normal |
| Growth Properties | Adherent |
| Sex | Male |
| Age/Ethinicity | 30 Year / White |
| Derivation | Immortalization method: HPV-16 E6/E7 expression |
| Biosafety | 2 |
| Addtional Info | HS-23 and HS-27A secrete low levels of growth factors and do not support proliferation of isolated progenitor cells in cocultures. The cell line can also be used as a feeder layer in ex vivo bone marrow cultures or in colony forming assays. HS-5 supports proliferation of hematopoietic progenitor cells when co-cultured in serum-deprived media with no exogenous factors |
| Culture Medium | Dulbecco's Modified Eagle's Medium (DMEM) modified to contain 2 mM L-glutamine, 4500 mg/L glucose and fetal bovine serum to a final concentration of 10%. |
| Subculturing | Volumes used in this protocol are for 75 cm2 flask; proportionally reduce or increase amount of dissociation medium for culture vessels of other sizes. Remove and discard culture medium. Briefly rinse the cell layer with PBS without calcium and magnesium to remove all traces of serum that contains trypsin inhibitor. Add 1.0 to 3.0 mL of Trypsin-EDTA solution to flask and observe cells under an inverted microscope until the cell layer is dispersed (usually within 5 to 15 minutes). Note: To avoid clumping do not agitate the cells by hitting or shaking the flask while waiting for the cells to detach. Cells that are difficult to detach may be placed at 37°C to facilitate dispersal. Add 6.0 to 8.0 mL of complete growth medium and aspirate cells by gently pipetting. Transfer cell suspension to centrifuge tube and spin at approximately 125 x g for 5 to 10 minutes. Discard supernatant and resuspend cells in fresh growth medium. Add appropriate aliquots of cell suspension to new culture vessels. Place culture vessels in incubators at 37°C. NOTE: For more information on enzymatic dissociation and subculturing of cell lines consult Chapter 12 in Culture of Animal Cells, a manual of Basic Technique by R. Ian Freshney, 6th edition, published by Alan R. Liss, N.Y., 2010. |
| Subculturing Medium Renewal | Every 2 to 3 days |
| Subculturing Subcultivation Ratio | 1:3 to 1:9 is recommended |
| Culture Conditions | Atmosphere: air, 95%; carbon dioxide (CO2), 5% Temperature: 37°C |
| Cryopreservation | 95% FBS + 5% DMSO (Dimethyl sulfoxide) |
| Thawing Frozen Cells | SAFETY PRECAUTION:
It is strongly recommended to always wear protective gloves, clothing, and a full-face mask when handling frozen vials. Some vials may leak when submerged in liquid nitrogen, allowing nitrogen to slowly enter the vial. Upon thawing, the conversion of liquid nitrogen back to its gas phase may cause the vial to explode or eject its cap with significant force, creating flying debris.
NOTE: It is important to avoid excessive alkalinity of the medium during cell recovery. To minimize this risk, it is recommended to place the culture vessel containing the growth medium in the incubator for at least 15 minutes before adding the vial contents. This allows the medium to stabilize at its normal pH (7.0 to 7.6). |
| References | Roecklein BA, Torok-Storb B. Functionally distinct human marrow stromal cell lines immortalized by transduction with the human papilloma virus E6/E7 genes. Blood 85: 997-1005, 1995. PubMed: 7849321 Torok-Storb B, et al. Human marrow stromal cell lines which sustain hematopoieses. US Patent 5,879,940 dated Mar 9 1999 |
| Depositors | Vânia Margaret Flosi Paschoalin - UNIVERSIDADE FEDERAL DO RIO DE JANEIRO |
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