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SRP9001 Sigma-Aldrich

Leukemia Inhibitory Factor

human, recombinant, expressed in HEK 293 cells

Synonym: Differentiation-stimulating factor, Emfilermin, LIF, Melanoma-derived LPL inhibitor

  •  NACRES NA.32



Related Categories CNTF Family - includes ciliary neurotrophic factor (CNTF), leukemia inhibitory factor (LIF) and interleukin-6 (IL-6), Cell Culture, Growth Factors and Cytokines, Hematopoietic Cytokines, Hormones,
Quality Level   200
biological source   human
recombinant   expressed in HEK 293 cells
assay   ≥95% (SDS-PAGE)
form   liquid
potency   ≤0.5 ng/mL M1 cells proliferation inhibition EC50
mol wt   20 kDa
packaging   pkg of 10 μg
application(s)   cell culture | mammalian: suitable
impurities   ≤1 EU/μg protein Endotoxin level
UniProt accession no.   P15018
storage temp.   −20°C
Gene Information   human ... LIF(3976)


General description

Leukemia inhibitory factor (LIF) is a secreted pleiotropic glycoprotein which is a member of the gp130 signaling of interleukin-6 (IL-6) family cytokines. This protein was originally identified as a protein that prevented the growth of a leukemic cell line.


One of the main uses of LIF in research is in mouse embryonic stem cell culture maintenance. LIF is necessary to maintain the stem cells in an undifferentiated state while retaining their proliferative potential or pluripotency. Removal of LIF pushes stem cells toward differentiation.

Biochem/physiol Actions

Leukemia inhibitory factor (LIF) suppresses the differentiation of myoblasts. It also inhibits the activation of caspase-3 and blocks the reduction in Bcl-xL (B cell lymphoma) levels, thus, preventing doxorubicin-induced apoptosis. Along with transforming growth factor β2 (TGFβ2)/fibroblast growth factor 2 (FGF2), LIF regulates nephrogenesis. It facilitates tubular regeneration following acute kidney failure. It plays a crucial role in neuroprotective pathways induced by preconditioning-induced oxidative stress. LIF is capable of maintaining the totipotency of embryonic stem cells. It is also involved in controlling the differentiation of embryonic stem cells, hematopoietic and neuronal cells.

Physical form

This product is supplied as a solution in 0.2 μm filtered phosphate buffered saline with no additives or carrier proteins. It is aseptically filled.

Preparation Note

Briefly centrifuge the vial before opening. After initial thawing it is recommended to store the protein in working aliquots at -20°C. The product can be diluted in PBS.

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Protocols & Articles


Hematopoietic Cytokines

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