L-138 Cells

Categories: Mouse cell lines Description: The L-138 cell line, also known by its original designation M138, is a melanoma cell line derived from cutaneous melanoma. Melanoma is a type of skin cancer originating from melanocytes, the cells responsible for producing melanin. This cell line has been crucial in understanding the surface antigens involved in melanoma and melanocyte differentiation. The L-138 cells are characterized by their expression of specific antigens that define subsets of melanoma, contributing to the classification and differentiation studies of melanoma types based on antigenic profiles. L-138 cells exhibit unique surface antigens, including the M-24 antigen, identified through monoclonal antibodies. These antigens have been analyzed serologically, revealing that the L-138 cell line expresses antigens detectable by several monoclonal antibodies specific to melanoma. These include the HLA-A,B,C antigens and beta2-microglobulin, which are highly reactive in most melanoma cell lines, providing insights into the immune recognition and classification of melanoma cells:citation[oaicite:0]{index=0} . Moreover, the L-138 cell line has been utilized in tyrosinase activity assays, an enzyme crucial for melanin synthesis. The tyrosinase activity in L-138 cells was measured using radiolabeled tyrosine, demonstrating the functional properties of melanoma cells in pigment production. This activity is compared against non-pigmented renal cancer cells, showcasing the distinct enzymatic activity in melanoma. Such studies help elucidate the metabolic pathways and potential therapeutic targets in melanoma treatment . Organism: Mouse Tissue: Hematopoietic, hybridoma Synonyms: M138, M 138, M-24 (M138), M-24, L138 Breed: BALB/c Morphology: Round cells Cell Type: Lymphoblast Growth Properties: Suspension Citation: L-138 (Cytion catalog number 400384) Biosafety Level: 1 Ncbi_ Taxid: 10090.0 Cellosaurus Accession: CVCL_J758 Products: Monoclonal antibody (immunoglobulin, IgG1) against human cutaneous melanocytes (M-24 antigen system). CLS does not warrant for antibody production of this cell line. Culture Medium: RPMI 1640, w: 2.0 mM stable Glutamine, w: 2.0 g/L NaHCO3 (Cytion article number 820700a) Supplements: Supplement the medium with 10% FBS Subculturing: Maintain cultures by periodically adding or replacing the medium. Initiate cultures with a density of 5 x 105 cells/ml and keep the cell concentration within the range of 3 x 105 to 1 x 106 cells/ml for optimal growth. Fluid Renewal: 2 to 3 times per week 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. Thawing And Culturing Cells: Confirm that the vial remains deeply frozen upon delivery, as cells are shipped on dry ice to maintain optimal temperatures during transit. Upon receipt, either store the cryovial immediately at temperatures below -150°C to ensure the preservation of cellular integrity, or proceed to step 3 if immediate culturing is required. For immediate culturing, swiftly thaw the vial by immersing it in a 37°C water bath with clean water and an antimicrobial agent, agitating gently for 40-60 seconds until a small ice clump remains. Perform all subsequent steps under sterile conditions in a flow hood, disinfecting the cryovial with 70% ethanol before opening. Carefully open the disinfected vial and transfer the cell suspension into a 15 ml centrifuge tube containing 8 ml of room-temperature culture medium, mixing gently. Centrifuge the mixture at 300 x g for 3 minutes to separate the cells and carefully discard the supernatant containing residual freezing medium. Gently resuspend the cell pellet in 10 ml of fresh culture medium. For adherent cells, divide the suspension between two T25 culture flasks, for suspension cultures, transfer all the medium into one T25 flask to promote effective cell interaction and growth. Adhere to established subculture protocols for continued growth and maintenance of the cell line, ensuring reliable experimental outcomes. 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. Safety Precautions: When planning to store a cryovial in liquid nitrogen for future thawing, it is mandatory to adhere to stringent safety measures. Appropriate protective gloves and clothing are essential, and the use of a face mask or safety goggles is required during the transfer of frozen samples to or from the liquid nitrogen tank. This is to mitigate the risk of injury from potential cryovial explosions upon removal, which can result in the projection of sharp fragments. Disclaimer: Our cells are provided for in vitro laboratory research purposes exclusively and are not intended for clinical or diagnostic use, nor are they to be administered to humans or used for veterinary purposes. Users must adhere to all applicable guidelines and regulations for the handling and use of these cells in a research setting. Warranty: We stand by the promise of delivering products with high cell viability and robust culture performance. To achieve the best results, please make sure you follow the storage and culture instructions detailed in the product information sheet closely. Your adherence to these guidelines is key to success. Certificate Of Analysis: The certificate of analysis can be requested on the website or via email at info@cytion.com. Please indicate the lot number of your product in the email. Subject To Material Transfer Agreements: If you intend to use Cytion cell lines solely for internal research at a single research site, please complete and sign our Material Transfer Agreement (MTA) and submit it along with your order.For any commercial applications - including but not limited to fee-for-service work, quality control testing, product release, diagnostic use, or regulatory studies - please complete the Intended Use Form so we can prepare a suitable agreement tailored to your project.Please note: The MTA applies only to certain cell lines. If this notice and the MTA document appear on a product page, the agreement is applicable. For cell lines not covered by the MTA, no reference to the agreement will be shown. The MTA is not valid for customers in the Americas, China, or Taiwan. Please contact our U.S. entity to receive the appropriate agreement. Required Product 1: 820700a Required Product 3: 860015.0 Required Product 4: 830100.0