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I5271 Sigma-Aldrich

Interleukin-1β from mouse

IL-1β, recombinant, expressed in E. coli, lyophilized powder, suitable for cell culture

Synonym: IL-1β, Lymphocyte activating factor



General description

Interleukin-1β (IL-1β) cytokine is generated by monocytes, dendritic cells, macrophages and keratinocytes. Pro-IL-1β, an IL-1β precursor undergoes proteolytic cleavage to produce its active form of 17 kDa.


Interleukin-1β from mouse has been used:
• as a proinflammatory agent, to induce inflammatory signaling cascades mediated cellular damage
• to study its effect on fetuin A-induced inflammatory response in podocyte
• to check its effect on the expression of mitogen-activated protein kinase 4 using 3T3-L1 adipocytes

Biochem/physiol Actions

Interleukin-1β (IL-1β) is a potent inflammatory cytokine, and mediates inflammation through proinflammatory molecules: cyclooxygenase-2 (COX2) and nitric oxide. IL-1β release is stimulated by injury and increased levels are observed in response to severe pain. It has its main function in T-cell activation, antigen recognition and T-helper cell 17 cell development. IL-1β is also responsible for the formation of IL-17 and IL-22 by nature killer T (NKT) cells and NK cells. It is known to induce inflammation in psoriasis and rheumatoid arthritis. IL-1β controls intercellular adhesion molecule-1 expression. It is significantly associated with bone damage and vascular injury.

Physical form

Lyophilized from 0.2 μm filtered solution in 10mM Sodium Citrate, pH 4.0

Analysis Note

The biological activity is measured by the dose-dependent stimulation of murine D10G4.1 cells.

Other Notes

The two closely related agents, Interleukin-1α (IL-1α) and Interleukin-1β (IL-1β) bind to the same cell surface receptor, elicit nearly identical biological responses and yet share 25% homology in their amino acid sequence.

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 


Certificate of Analysis


Certificate of Origin


Request a Serum Sample

Cell Culture Guide
Protocols & Articles


Interleukin Family (IL)

The Interleukins comprise a disparate group of cytokines and growth factors that are produced by and released from leukocytes. Interleukin-1β (1L-1β) is released primarily from stimulated macrophages...
Jennifer Fries
BioFiles 2009, 4.5, 16.
Keywords: Anti-inflammatory agents, Antitumor agents, Cancer, Cell proliferation, Gene expression, Growth factors, Transcription

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