Norepinephrine is an alkaloid neurotransmitter and an effective adrenergic receptor (AR) agonist that activates α1, α2, and β1 receptors. It is commonly used as a vasoactive agent for the treatment of shock and can also be used to induce cardiomyopathy models.

α2A-adrenoceptor:56 nM (Ki), β1-adrenoceptor:740 nM (Ki), α1-adrenoceptor:330 nM (Ki)

METHODS: Adult hippocampal cells were treated with Norepinephrine (0.1-10 µM) for 10-13 days and the number of neurospheres was determined using classical neurosphere assay.
RESULTS: A significant increase in the number of neurospheres was obtained at 100 nm and in the presence of 1 µM Norepinephrine, and a twofold increase in the number of neurospheres was observed in the presence of 10 µM Norepinephrine. [1]
METHODS: Human pancreatic cancer cells BxPC-3 and Panc-1 were treated with Norepinephrine (10 µM) for 12-48 h. Cell viability was assayed by MTT Assay.
RESULTS: Norepinephrine treatment alone significantly enhanced the viability of PDAC cells. [2]

METHODS: To test in vivo activity, Norepinephrine (0.2-2 mg/kga) was administered intraperitoneally to C57BL6/J mice fed a high-fat diet once daily for two weeks.
RESULTS: A subset of Norepinephrine-treated mice developed unexpected adverse events, including bladder dilatation and decreased renal perfusion due to renal discoloration. [3]