ZM-241385 is a high-affinity antagonist ligand selective for the adenosine A2A receptor.

ZM 241385 has high affinity for A2a receptors. In rat phaeochromocytoma cell membranes, ZM 241385 displaces binding of tritiated 5'-N-ethylcarboxamidoadenosine (NECA) with a pIC50 of 9.52[3]. ZM241385 delays the appearance of anoxic depolarization (AD), a phenomenon strictly related to cell damage and death, protect from the synaptic activity depression brought about by a severe (7?min) OGD period, and protect CA1 neuron and astrocyte from injury[4].

ZM-241385 significantly blunts the hypotensive effects of CCPA and NECA without altering the bradycardia induced by these agonists. It blocks the infarct size-reducing effects(cardioprotective effects) of this two distinct adenosine receptor agonists[1].

Nitric oxide (NO) production is assessed by measuring the amount of nitrite, a stable metabolic product of NO that provides an indirect measurement of NO, by using the Griess diazotization reaction. Briefly, 24 h after incubation with 1.0 µM CG21680 or 1.0 µM ZM241385 or exposure to SMF, samples of medium (150 µl) are collected from cells and mixed with 130 µl dWater and with 20 µl Griess reagent using instruction supplied by the manufacturer. After a 30 min incubation period at room temperature, the samples are evaluated spectrophotometrically at 548 nm and OD values-in comparison with a standard curve is determined in culture medium by using serial dilutions of sodium nitrite-represented total stable metabolites of NO. (Only for Reference)