KC-3743

3A9-Cell-Line-(not-for-sale)

34698

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Background of 3A9-Cell-Line-(not-for-sale)

3A9 is a T cell hybridoma line that was isolated in 1982 from a mouse. It is reactive against HEL [small protein hen egg-white lysozyme (HEL) composed of 129 amino acid] presented by macrophages in the context of I-A polypeptides. This cell line secretes IL-2 upon interaction with l A-bearing peritoneal macrophages that had taken up native HEL. This cell line was deposited by P Allen.

Specifications

Catalog Number	KC-3743
Cell Line Name	3A9-Cell-Line-(not-for-sale)
Host Cell Line	NA
Quantity	Two vials of frozen cells (≥2-10⁶/vial)
Stability	Stable in culture over a minimum of 10 passages
Application	3D cell culture; Cancer research
Freezing Medium	70% RPMI1640+20% FBS+10% DMSO
Propagation Medium	RPMI1640+10%FBS
Selection Marker	NA
Morphology	Lymphoblast-like
Subculture	Split saturated culture 1:4-1:6 every 2-3 days; seed out at about 1-3 × 10⁵ cells/mL
Incubation	37 °C with 5% CO₂
Storage	Liquid nitrogen immediately upon receiving
Doubling Time	Approximately 30 hours
Mycoplasma Status	Negative
In Vivo Validation	NA

Cell Line Generation

Characterization

Cell Resuscitation

Prewarm culture medium (RPMI1640 + 10% FBS)in a 37°C water bath.
Thaw the frozen vial in a 37°C water bath for 1-2 minutes.
Transfer the vial into biosafety cabinet, and wipe the surface with 70% ethanol.
Unscrew the top of the vial and transfer the cell suspension gently into a sterile centrifuge tube containing 9.0mL complete culture medium.
Spin at ~ 125 × g for 5-7 minutes at room temperature, and discard the supernatant without disturbing the pellet.
Resuspend cell pellet with the appropriate volume of complete medium and transfer the cell suspension into a T25 culture flask.
Incubate the flask at 37°C, 5% CO₂ incubator.
Split saturated culture 1:2-1:3 every 3-4 days; seed out at about 1-3 × 10⁵ cells/mL.

Cell Freezing

Prepare the freezing medium (70% RPMI-1640 + 20% FBS + 10% DMSO) fresh immediately before use.
Keep the freezing medium on ice and label cryovials.
Transfer cells to a sterile, conical centrifuge tube, and count the cells.
Centrifuge the cells at 250×g for 5 minutes at room temperature and carefully aspirate off the medium.
Resuspend the cells at a density of at least 3×10⁶ cells/mL in chilled freezing medium.
Aliquot 1 mL of the cell suspension into each cryovial.
Freeze cells in the CoolCell freezing container overnight in a -80°C freezer.
Transfer vials to liquid nitrogen for long-term storage

References

Differential requirements for antigen processing by macrophages for lysozyme-specific T cell hybridomas. J. Immunol. 132:1077-1079(1984).