Safe Harbor Landing Pad Cell Line THP-1 Monocytes

The STR profile of this cell line matches that of its parental cell line ATCC^®Catalog No. TIB-202. THP-1 are a human monocyte cell line isolated from the peripheral blood of a male infant with acute monocytic leukemia. The cells are phagocytic and lack surface and cytoplasmic immunoglobulins. Differentiation can be induced with TPA.

This product is a human THP-1 monocyte cell line in which a landing pad cassette has been integrated into the AAVS1 safe harbor locus using CompoZr^® Zinc Finger Nuclease technology. The mKATE2 fluorescence gene was integrated following the EF1a promoter and flanked by unique Cre-lox sites. The design of this landing pad cassette allows for easy, fast, and affordable genetic modification using Cre recombinase. mKATE2 can easily be exchanged for a payload of the user′s choice using Cre recombinase and a targeting vector with appropriate lox sites. Cells can then be sorted via fluorescence-activated cell sorting (FACS) for loss of mKATE2 expression as a surrogate for successful integration of the targeting vector. Approximately 7-10 days are required for loss of the mKATE2 signal in successfully targeted cells. See technical bulletin for detailed protocols.

These cells were derived from the peripheral blood of a 1-year old male with acute monocytic leukemia. These cells have Fc and C3b receptors and lack surface and cytoplasmic immunoglobulins. They stain positive for α-napthhyl butyrate esterase, produce lysozymes, and are phagocytic (both latex beads and sensitized erythrocytes). They can restore the response of purified T lymphocytes to Concanavalin A, show increased CO2 production on phagocytosis, and can be differentiated into macrophage-like cells using, for example, DMSO.

These cells contain the mKATE2 fluorescence gene flanked by unique Cre-lox sites inserted in the AAVS1 safe harbor gene. These THP-1 cells are grown in suspension with a doubling time of approximately 24 hours.

Tested for Mycoplasma, bacterial and fungal content, post-freeze viability, short terminal repeat (STR) analysis for cell line identification.

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