Prolactin is a neuroendocrine pituitary hormone of 23 kDa. It is produced in increasing amounts during pregnancy and during suckling and acts primarily on the mammary gland by initiating and maintaining lactation in the postpartal phase. Prolactin has been shown also to have cytokine-like activities and to have important immunoregulatory activities. It contributes to the development of lymphoid tissues and the maintenance of physiological immune function and also modulates a variety of T cell immune responses. In addition to triggering resting lymphocytes to cell division, the hormone can also control the magnitude of their response to polyclonal stimuli. Prolactin promotes the proliferation of Nb2 pre-T cell lymphoma cells. In these cells prolactin induces the biphasic expression of a transcription factor, IRF1 and may be involved in cell cycle activation and S phase progression. Prolactin has been reported to activate cellular proliferation in non-reproductive tissue, such as liver, spleen, and thymus. It induces significant proliferation in aortic smooth muscle cells and also enhances proliferation of these cells induced by PDGF.
Alternative Names
PRL
Quantity
10 µg
Regulatory
RUO
Source
Insect cells
Host
Mouse
Endotoxin Level
<1.0 EU/μg of recombinant protein as determined by the LAL method.
Biological Activity Comment
The activity was determined by the dose-dependent proliferation of Nb2 cells.
Weight
23.0 kDa
Description
A quick spin of the vial followed by reconstitution in distilled water to a concentration of 0.1 mg/mL.
Format
Lyophilized PowderRecombinant mouse Prolactin is presented as concentrated 1mg/ml, 0.2 μm filtered 20 mM Tris solution, 0.5 M NaCl pH 7.4, containing 5% trehalose 10% glycerol.
Purity
>95% as determined by SDS-PAGE
Storage
Upon reconstitution, this cytokine can be stored in working aliquots at 2° - 8°C for one month, or at -20°C for six months, with a carrier protein without detectable loss of activity.