Reagents and instruments for immunology, cell biology and molecular biology.

MeWo

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Cat# 300285

Size : 1cryovial

Brand : CLS Cell Lines Service

MeWo Cells

Description	The cells support the growth of varicella-zoster virus (VZV) isolates at 36 degree Celsius although growth is optimal at 32 degree Celsius.
Organism	Human
Tissue	Skin
Disease	Cutaneous melanoma
Metastatic site	Lymph node
Applications	Virus studies
Synonyms	MEWO, Mewo, Me Wo, Me-Wo, Mevo, SK-MEL-MeWo, Mel-MeWo, BI-Mel, EST50

Age	78 years
Gender	Male
Ethnicity	Caucasian
Morphology	Fibroblast-like
Growth properties	Adherent

Citation	MeWo (Cytion catalog number 300285)
Biosafety level	1

Tumorigenic	Forms malignant melanoma
Products	Melanin
Mutational profile	BRAF V600E wt

Culture Medium	EMEM, w: 2 mM L-Glutamine, w: 1.5 g/L NaHCO3, w: EBSS, w: 1 mM Sodium pyruvate, w: NEAA (Cytion article number 820100c)
Medium supplements	Supplement the medium with 10% FBS
Passaging solution	Accutase
Subculturing	Remove the old medium from the adherent cells and wash them with PBS that lacks calcium and magnesium. For T25 flasks, use 3-5 ml of PBS, and for T75 flasks, use 5-10 ml. Then, cover the cells completely with Accutase, using 1-2 ml for T25 flasks and 2.5 ml for T75 flasks. Let the cells incubate at room temperature for 8-10 minutes to detach them. After incubation, gently mix the cells with 10 ml of medium to resuspend them, then centrifuge at 300xg for 3 minutes. Discard the supernatant, resuspend the cells in fresh medium, and transfer them into new flasks that already contain fresh medium.
Split ratio	A ratio of 1:3 to 1:6 is recommended
Fluid renewal	2 to 3 times per week
Freeze medium	CM-1 (Cytion catalog number 800100) or CM-ACF (Cytion catalog number 806100)
Handling of cryopreserved cultures	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. Optionally, skip centrifugation but remove any remaining freezing medium after 24 hours. 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.
STR profile	Amelogenin: x,y CSF1PO: 12 D13S317: 8,9 D16S539: 10,12 D5S818: 12,13 D7S820: 10,12 TH01: 7,9 TPOX: 8,1 vWA: 15 D3S1358: 17 D21S11: 30,32.2 D18S51: 14,17 Penta E: 5 Penta D: 10 D8S1179: 13,15 FGA: 22 D1S1656: 15,16 D6S1043: 12 D2S1338: 21,23 D12S391: 16,17 D19S433: 14,16
HLA alleles	A: 02:01:01, 26:01:01 B: 14:02:01, 38:01:01 C: 08:02:01, 12:03:01 DRB1: 01:02:01, 11:01:01G DQA1: 01:01:02, 05:05:01 DQB1: 03:01:01G, 05:01:01G DPB1*: 04:01:01G, 04:02:01G E: 01:xx, 01:03:01