SKW-3 Cells




















General information
Description | The SKW-3 cell line, originally believed to be derived from the peripheral blood of a 61-year-old male diagnosed with chronic lymphocytic leukemia (CLL), represents a significant point of interest in cancer research, particularly in the study of B-cell leukemias. Over time, critical reassessments using Short Tandem Repeat (STR) profiling have illuminated an important issue—SKW-3 cells are not a pure line from the CLL patient, but are instead contaminated, now identified as a derivative of the KE-37 cell line. This revelation has profound implications for past research and future studies, emphasizing the need for rigorous cell line authentication to ensure experimental accuracy. KE-37, the true origin of the SKW-3 cells, is a B-cell line established from a patient with acute lymphoblastic leukemia (ALL). This shift in origin from CLL to ALL, due to the contamination, drastically alters the biological context and utility of the SKW-3 line. For researchers, this means that any findings or data previously attributed to CLL-specific mechanisms when using SKW-3 must be critically evaluated and potentially revised. The reclassification to a derivative of KE-37 necessitates a shift in the application of SKW-3 cells towards studies more relevant to ALL and its underlying mechanisms, rather than CLL. |
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Organism | Human |
Tissue | Hematopoietic |
Disease | T cell leukemia (CLL) |
Synonyms | SKW3 |
Characteristics
Age | 27 years |
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Gender | Male |
Ethnicity | Caucasian |
Morphology | Round cells |
Cell type | T Lymphocyte |
Growth properties | Suspension |
Identifiers / Biosafety / Citation
Citation | SKW-3 (Cytion catalog number 300343) |
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Biosafety level | 1 |
Expression / Mutation
Antigen expression | CD2+, CD3-, CD4+, CD8, Thy-1-like antigen |
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Products | LECT2 (chemotactic protein) |
Handling
Culture Medium | RPMI 1640, w: 2.0 mM stable Glutamine, w: 2.0 g/L NaHCO3 (Cytion article number 820700a) |
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Medium supplements | Supplement the medium with 10% FBS |
Doubling time | 30 hours |
Subculturing | Maintain cultures by periodically adding or replacing the medium. Initiate cultures with a density of 2 x 10^5 cells/ml and keep the cell concentration within the range of 1 x 10^5 to 1 x 10^6 cells/ml for optimal growth. |
Freezing recovery | 1 x 10^5/ml |
Freeze medium | As a cryopreservation medium, use complete growth medium (including FBS) + 10% DMSO for adequate post-thaw viability, or CM-1 (Cytion catalog number 800100), which includes optimized osmoprotectants and metabolic stabilizers to enhance recovery and reduce cryo-induced stress. |
Handling of cryopreserved cultures |
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Quality control / Genetic profile / HLA
Sterility | Mycoplasma contamination is excluded using both PCR-based assays and luminescence-based mycoplasma detection methods. To ensure there is no bacterial, fungal, or yeast contamination, cell cultures are subjected to daily visual inspections. |
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STR profile |
CSF1PO: 10,12
D13S317: 8,12
D16S539: 11,12
D5S818: 12,13
D7S820: 8,12
TH01: 6,9.3
TPOX: 8
vWA: 17,18
D3S1358: 15,18
D21S11: 28,29,39
D18S51: 13,18
Penta E: 5,14
Penta D: 11,15
D8S1179: 11,14
FGA: 24,25
D1S1656: 15.3,16
D6S1043: 18,21
D2S1338: 19,25
D12S391: 19,22
D19S433: 13,15
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HLA alleles |
A*: '11:01:01, '30:01:01
B*: '35:01:01, '44:02:01
C*: '04:01:01, '05:01:01
DRB1*: '01:03:01, '04:01:01
DQA1*: '01:01:01, '03:03:01
DQB1*: '03:01, '05:01
DPB1*: '04:01:01, '04:02:01
E: '01:01:01
|
Required products
Initially designed to support the growth of human leukemic cells in both suspension and monolayer cultures, RPMI 1640 Medium has evolved through modifications by researchers and commercial suppliers to become suitable for a diverse range of mammalian cells. It is exceptionally compatible with cell lines such as HeLa, Jurkat, MCF-7, PC12, PBMC, astrocytes, and carcinomas.
RPMI 1640 Medium stands apart from other cell culture media due to its unique composition. It contains a substantial amount of phosphate, amino acids, and vitamins. Notably, it encompasses biotin, vitamin B12, and PABA, absent in Eagle's Minimal Essential Medium or Dulbecco's Modified Eagle Medium. Moreover, RPMI 1640 Medium exhibits significantly elevated concentrations of vitamins inositol and choline. However, it does not contain proteins, lipids, or growth factors. Consequently, supplementation with 10% Fetal Bovine Serum (FBS) is commonly required to provide optimal conditions for cell growth.
The buffering system of RPMI 1640 Medium relies on sodium bicarbonate and necessitates a 5-10% CO2 environment to maintain a physiologically appropriate pH. The inclusion of the reducing agent glutathione further distinguishes this medium from others.
Quality Control
Sterile-filtered
Storage and Shelf Life
Store at +2°C to +8°C, protected from light.
Once opened, store at 4°C and use within 6–8 weeks.
Shipping Conditions
Ambient temperature
Maintenance
Keep refrigerated at +2°C to +8°C in the dark. Avoid freezing and frequent warming to +37°C, as it reduces product quality.
Do not heat the medium beyond 37°C or use uncontrolled heat sources such as microwave appliances.
If only part of the medium is to be used, remove the required amount and warm it to room temperature before use.
Composition
Category
Components
Concentration (mg/L)
Amino Acids
Glycine
10.00
L-Alanyl-L-Glutamine
434.40
L-Arginine
200.00
L-Asparagine H2O
56.82
L-Aspartic Acid
20.00
L-Cystine 2HCl
65.20
L-Glutamic Acid
20.00
L-Histidine HCl H2O
20.27
L-Hydroxy-L-Proline
20.00
L-Isoleucine
50.00
L-Leucine
50.00
L-Lysine HCl
40.00
L-Methionine
15.00
L-Phenylalanine
15.00
L-Proline
20.00
L-Serine
30.00
L-Threonine
20.00
L-Tryptophan
5.00
L-Tyrosine 2Na 2H2O
28.83
L-Valine
20.00
Vitamins
p-Amino Benzoic Acid
1.00
D-Biotin
0.20
Choline Chloride
3.00
D-Calcium Pantothenate
0.25
Folic Acid
1.00
myo-Inositol
35.00
Nicotinamide
1.00
Pyridoxine HCl
1.00
Riboflavin
0.20
Thiamine HCl
1.00
Vitamin B12
0.005
Inorganic Salts
Ca(NO3)2 4H2O
100.00
KCl
400.00
MgSO4 7H2O
100.00
NaCl
6000.00
NaHCO3
2000.00
Na2HPO4
800.00
Other Components
D-Glucose
2000.00
L-Glutathione Reduced
1.00
Phenol Red Sodium Salt
5.30
Phosphate-buffered saline (PBS) is a widely used buffer solution in biological and chemical research. It plays a crucial role in maintaining the pH balance and osmolarity during various experimental procedures, including tissue processing and cell culture. Our PBS solution is meticulously formulated with high-purity ingredients to ensure stability and reliability in every experiment. The osmolarity and ion concentrations of our PBS closely mimic those of the human body, making it isotonic and non-toxic to most cells.
Composition of Our PBS Solution
Our PBS solution is a pH-adjusted blend of ultrapure-grade phosphate buffers and saline solutions. At a 1X working concentration, it contains:
8000 mg/L Sodium chloride (NaCl)
200 mg/L Potassium chloride (KCl)
1150 mg/L Sodium phosphate dibasic anhydrous (Na2HPO4)
200 mg/L Potassium phosphate monobasic anhydrous (KH2PO4)
This composition ensures an optimal pH and ionic balance, suitable for a wide range of biological applications.
Applications of Our PBS Solution
Our PBS solution is ideal for various applications in biological research. Its isotonic and non-toxic properties make it suitable for substance dilution and cell container rinsing. PBS solutions containing EDTA are effective for disengaging attached and clumped cells. However, divalent metals such as zinc should not be added to PBS, as this can cause precipitation. In such cases, Good's buffers are recommended. Additionally, our PBS solution is an acceptable alternative to viral transport medium for the transport and storage of RNA viruses, including SARS-CoV-2.
Quality Control
Sterile-filtered
Storage and Shelf Life
Store at +2°C to +25°C, protected from light.
Once opened, store at 2°C to 25°C and use within 24 months.
Shipping Conditions
Ambient temperature
Maintenance
Keep refrigerated at +2°C to +8°C in the dark. Avoid freezing and frequent warming to +37°C, as it reduces product quality.
Do not heat the medium beyond 37°C or use uncontrolled heat sources such as microwave appliances.
If only part of the medium is to be used, remove the required amount and warm it to room temperature before use.
Composition
Category
Components
Concentration (mg/L)
Salts
Potassium chloride
200
Potassium phosphate monobasic anhydrous
200
Sodium chloride
8000
Sodium phosphate dibasic anhydrous
1150