BRL-44408 maleate 

BRL-44408 maleate is a selective, blood-brain barrier-permeable α₂A-adrenergic receptor antagonist with a K_i value of 8.56 nM against human targets. BRL-44408 maleate exhibits activities such as antidepressant, analgesic effects and attenuation of sepsis-induced acute lung injury by regulating the release of neurotransmitters such as norepinephrine and dopamine, or inhibiting signaling pathways including ERK1/2, p38MAPK and p65. BRL-44408 maleate can be used in studies related to acute respiratory distress syndrome, depression and visceral pain^[1][2].

Ki: 8.5 nM (α2A-adrenoceptor)^[1]

BRL-44408 maleate (0-12.5 h) can inhibit the secretion of proinflammatory cytokines and the phosphorylation of ERK1/2, p38MAPK and p65 in LPS (HY-D1056)-induced NR8383 rat alveolar macrophages, with no effect on the activation of JNK or PKA^[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

BRL-44408 maleate (5 mg/kg; i.p.; single administration) alleviates cecal ligation and puncture (CLP)-induced acute respiratory distress syndrome (ARDS) in rats by reducing pulmonary edema, pathological damage of lung tissues, macrophage infiltration, and proinflammatory mediator production, as well as inhibiting the activation of ERK1/2, p38MAPK and p65 signaling pathways^[1].
BRL-44408 (10 mg/kg; subcutaneous injection; single administration) maleate significantly elevates extracellular norepinephrine (up to 204%), dopamine (up to 110%) and acetylcholine (up to 75%) levels in the medial prefrontal cortex (mPFC) of rats for at least 3.5 hours post-administration, without altering serotonin levels^[2].
BRL-44408 maleate (3-30 mg/kg; i.p.; administered once at 24 h, 5 h and 1 h prior to testing, for a total of 3 times) exerts significant antidepressant-like effects in the forced swimming test in rats, reducing the immobility time by 30% (10 mg/kg) and 49% (30 mg/kg), while increasing the climbing time by 48% (10 mg/kg) and 107% (30 mg/kg)^[2].
BRL-44408 maleate (10-30 mg/kg; i.p.; single administration; pretreated 20 minutes before testing) exerts significant antidepressant-like effects in the rat procedure-induced polydipsia test, reducing the additional water intake by 34% (17 mg/kg) and 44% (30 mg/kg), respectively^[2].
BRL-44408 maleate (1-30 mg/kg; i.p.; single administration; pretreated 60 minutes prior to PPQ administration) exerts significant analgesic effects in a mouse PPQ visceral pain model, reversing somatic stretching behaviors by 32% (10 mg/kg) and 52% (30 mg/kg), respectively^[2].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

331.37

C₁₇H₂₁N₃O₄

681806-46-2

Solid

Light brown to brown

CC1N(CC2=NCCN2)CC3=C1C=CC=C3.O=C(O)/C=C\C(O)=O

Room temperature in continental US; may vary elsewhere.

-20°C, sealed storage, away from moisture

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

• [1]. Cong Z, et al. α_2A -AR antagonism by BRL-44408 maleate attenuates acute lung injury in rats with downregulation of ERK1/2, p38MAPK, and p65 pathway. J Cell Physiol. 2020;235(10):6905-6914.  [Content Brief]

  [2]. Dwyer JM, et al. Preclinical characterization of BRL 44408: antidepressant- and analgesic-like activity through selective alpha2A-adrenoceptor antagonism. Int J Neuropsychopharmacol. 2010;13(9):1193-1205.  [Content Brief]