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CCRF-CEM Acute lymphocytic leukemia (ALL); Human


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ATCC determines the biosafety level of a material based on our risk assessment as guided by the current edition of Biosafety in Microbiological and Biomedical Laboratories (BMBL), U.S. Department of Health and Human Services. It is your responsibility to understand the hazards associated with the material per your organization’s policies and procedures as well as any other applicable regulations as enforced by your local or national agencies.

ATCC highly recommends that appropriate personal protective equipment is always used when handling vials. For cultures that require storage in liquid nitrogen, it is important to note that some vials may leak when submersed in liquid nitrogen and will slowly fill with liquid nitrogen. Upon thawing, the conversion of the liquid nitrogen back to its gas phase may result in the vial exploding or blowing off its cap with dangerous force creating flying debris. Unless necessary, ATCC recommends that these cultures be stored in the vapor phase of liquid nitrogen rather than submersed in liquid nitrogen.

Detailed product information


Technical information
ATCC Technical Services does not have technical information on patent deposits that are not produced or characterized by ATCC. Additional information can be found in the corresponding patent available from the patent holder or with the U.S. and/or international patent office.

Handling information

Unpacking and storage instructions
  1. Check all containers for leakage or breakage.
  2. Remove the frozen cells from the dry ice packaging and immediately place the cells at a temperature below ­-130°C, preferably in liquid nitrogen vapor, until ready for use.
Handling procedure


- Initiate culture as soon as possible upon receipt.

- Thaw by rapid agitation in 37°C water bath. Thawing should be rapid (within

40-60 seconds). As soon as the ice is melted, remove the ampule from the water

bath and immerse in 70% ethanol at room temperature. All of the operations from

this point on should be carried out under strict aseptic conditions.

- Transfer the cell suspension and dilute it with the recommended culture

medium in a culture flask (see specific batch information above for dilution

ratio); incubate at 37°C with 5% CO2 in air atmosphere. Since it is important

to avoid excessive alkalinity of the medium during recovery of the cells, it is

suggested that the culture medium be placed into the culture flask, tube, etc.

and the pH be adjusted, as necessary, prior to the addition of the ampule

contents. Note that the bicarbonate content of the culture medium will

determine whether an atmosphere containing CO2 will be required.

- It is not necessary to remove the freezing additive. However, if desired, the

culture medium may be changed to remove the protective freezing additive

(dimethylsulfoxide) 24 hours after thawing. If it is desired that the freezing

additive be removed immediately, or that a more concentrated cell suspension be

obtained, centrifuge the above diluted suspension at approximately 125 x g for

10 minutes, discard the fluid and resuspend the cells with growth medium at the

dilution ratio given in the specific batch information above.


Every 2-3 days.


Cultures can be maintained by the addition of fresh medium or replacement of

medium. Alternatively, cultures can be established by centrifugation with

subsequent resuspension at 1-2 x 10(5) viable cells/ml. Maintain cell density

between 10(5) and 10(6) per ml.



The flask was seeded with cells (see specific batch information above for

concentration), grown and completely filled with medium to prevent loss of

cells in transit. Upon receipt incubate the flask in an upright position for

several hours to return the flask contents to 37°C. After the temperature has

equilibrated, aseptically remove the entire contents of the flask and

centrifuge at 300 x g for 15 minutes. Resuspend the cell pellet in 10-12 ml of

the shipping medium. From this suspension remove a sample for a cell count and

viability so that the cell density of the suspension can be adjusted to 2-3 x

10(5) viable cells/ml. If the suspension needs to be diluted use the shipping

medium. Incubate the culture in a flat position at 37°C in a 5% CO2 in air

atmosphere. Maintain the cell density of the culture as suggested under the

subculture procedure described above.



This human cell line is sent with the condition that you assume all risks and

responsibility in connection with its receipt, handling, storage and use.

This material is cited in a U.S. and/or other Patent Application and may not be

used to infringe the patent claims.



Depositor: Otsuka Pharmaceutical Co., Ltd., Osaka, Japan.


Quality control specifications

Mycoplasma contamination
Not detected


Patent depository
This material was deposited with the ATCC Patent Depository to fulfill U.S. or international patent requirements. This material may not have been produced or characterized by ATCC.  As an International Depository Authority (IDA) for patent deposits, ATCC is required to complete viability testing only at time of initial deposit of patent material. Patent deposits are made available on behalf of the Depositor when the pertinent U.S. or international patent is issued, but material may not be used to infringe the patent claims.
Patent number

Legal disclaimers

Intended use
This product is intended for laboratory research use only. It is not intended for any animal or human therapeutic use, any human or animal consumption, or any diagnostic use.

The product is provided 'AS IS' and the viability of ATCC® products is warranted for 30 days from the date of shipment, provided that the customer has stored and handled the product according to the information included on the product information sheet, website, and Certificate of Analysis. For living cultures, ATCC lists the media formulation and reagents that have been found to be effective for the product. While other unspecified media and reagents may also produce satisfactory results, a change in the ATCC and/or depositor-recommended protocols may affect the recovery, growth, and/or function of the product. If an alternative medium formulation or reagent is used, the ATCC warranty for viability is no longer valid.  Except as expressly set forth herein, no other warranties of any kind are provided, express or implied, including, but not limited to, any implied warranties of merchantability, fitness for a particular purpose, manufacture according to cGMP standards, typicality, safety, accuracy, and/or noninfringement.


This product is intended for laboratory research use only. It is not intended for any animal or human therapeutic use, any human or animal consumption, or any diagnostic use. Any proposed commercial use is prohibited without a license from ATCC.

While ATCC uses reasonable efforts to include accurate and up-to-date information on this product sheet, ATCC makes no warranties or representations as to its accuracy. Citations from scientific literature and patents are provided for informational purposes only. ATCC does not warrant that such information has been confirmed to be accurate or complete and the customer bears the sole responsibility of confirming the accuracy and completeness of any such information.

This product is sent on the condition that the customer is responsible for and assumes all risk and responsibility in connection with the receipt, handling, storage, disposal, and use of the ATCC product including without limitation taking all appropriate safety and handling precautions to minimize health or environmental risk. As a condition of receiving the material, the customer agrees that any activity undertaken with the ATCC product and any progeny or modifications will be conducted in compliance with all applicable laws, regulations, and guidelines. This product is provided 'AS IS' with no representations or warranties whatsoever except as expressly set forth herein and in no event shall ATCC, its parents, subsidiaries, directors, officers, agents, employees, assigns, successors, and affiliates be liable for indirect, special, incidental, or consequential damages of any kind in connection with or arising out of the customer's use of the product. While reasonable effort is made to ensure authenticity and reliability of materials on deposit, ATCC is not liable for damages arising from the misidentification or misrepresentation of such materials.

Please see the material transfer agreement (MTA) for further details regarding the use of this product. The MTA is available at

This material is cited in a US and/or international patent and may not be used to infringe the claims. Depending on the wishes of the Depositor, ATCC may be required to inform the Depositor of the party to which the material was furnished.

Permits & Restrictions

Import Permit for the State of Hawaii

If shipping to the U.S. state of Hawaii, you must provide either an import permit or documentation stating that an import permit is not required. We cannot ship this item until we receive this documentation. Contact the Hawaii Department of Agriculture (HDOA), Plant Industry Division, Plant Quarantine Branch to determine if an import permit is required.



Frequently Asked Questions

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