CEM/C1 (ATCC® CRL-2265™)

Organism: Homo sapiens, human  /  Tissue: peripheral blood  /  Cell Type: T lymphoblast

Organism Homo sapiens, human
Tissue peripheral blood
Cell Type T lymphoblast
Product Format frozen
Morphology lymphoblast
Culture Properties suspension
Biosafety Level 1
Disease acute lymphoblastic leukemia
Age 4 years
Gender Female
Ethnicity Caucasian
Storage Conditions liquid nitrogen vapor phase
Images CRL-2265 Micrograph
Derivation

CEM/C1 is a camptothecin (CPT) resistant derivative of the human T cell leukemia cell line CCRF-CEM (see ATCC CCL-119). The cell line was selected and subcloned in 1991 for resistance to CPT.
Clinical Data
4 years
Caucasian
female
Comments

This cell line exhibits cross resistance to both the water soluble (topotecan) and water insoluble (9-amino-CPT and 10,11-methylenedioxy-CPT) analogs of CPT.

CEM/C1 cells are approximately 31 fold less sensitive to CPT than the parental CEM cells.

CEM/C1 cells display atypical multidrug resistance (MDR) and altered topoisomerase I catalytic activity.
Resistance to CPT is stable for up to six months.
Complete Growth Medium The base medium for this cell line is ATCC-formulated RPMI-1640 Medium, Catalog No. 30-2001. To make the complete growth medium, add the following components to the base medium: fetal bovine serum to a final concentration of 10%.
Subculturing

Cultures can be maintained by addition or replacement of medium. Establish new cultures at 2 x 105 viable cells/mL and maintain between 1 x 105 and 2 x 106.

Medium Renewal: Every 2 to 3 days
Cryopreservation
culture medium 95%; DMSO, 5%
Culture Conditions
Temperature: 37°C
Population Doubling Time 26 hrs
Name of Depositor WG Harker
Year of Origin 1991
References

Kapoor R, et al. Altered topoisomerase I expression in two subclones of human CEM leukemia selected for resistance to camptothecin. Oncol. Res. 7: 83-95, 1995. PubMed: 7579731

Fujimori A, et al. Mutation at the catalytic site of topoisomerase I in CEM/C2, a human leukemia cell line resistant to camptothecin. Cancer Res. 55: 1339-1346, 1995. PubMed: 7882333

Basic Documentation
Product Sheet
Product Sheet
Certificate of Analysis
Certificate of Analysis
MSDS
MSDS
Other Documentation
Other Document
Cell Micrograph
References

Kapoor R, et al. Altered topoisomerase I expression in two subclones of human CEM leukemia selected for resistance to camptothecin. Oncol. Res. 7: 83-95, 1995. PubMed: 7579731

Fujimori A, et al. Mutation at the catalytic site of topoisomerase I in CEM/C2, a human leukemia cell line resistant to camptothecin. Cancer Res. 55: 1339-1346, 1995. PubMed: 7882333