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A Potent Blocker of L-Type and T-Type CaV Channels
Cat #: A-135
Alternative Name Calblock®
Lyophilized Powder yes
  • Bioassay Tested
  • Source Synthetic
    MW: 582.65
    Purity: >98%
    Effective concentration 1 – 100 µM.
    Chemical name 2-Amino-1,4-dihydro-6-methyl-4-(3 nitrophenyl)-3,5-pyridinedicarboxylic acid 3-[1-(diphenylmethyl)-3-azetidinyl] 5-(1-methylethyl) ester.
    Molecular formula C33H34N4O6.
    CAS No.: 123524-52-7
    Activity 0.3-1 μM inhibited guinea-pig vascular smooth muscle1.
    1. Zhu, H.L. et al. (2006) Br. J. Pharmacol. 149, 786.
    Shipping and storage Shipped at room temperature. Product as supplied can be stored intact at room temperature for several weeks. For longer periods, it should be stored at -20°C.
    Solubility DMSO. Centrifuge all product preparations before use (10000 x g 5 min).
    Storage of solutions Up to four weeks at 4°C or three months at -20°C.
    Our bioassay
    • Alomone Labs Azelnidipine inhibits L-type voltage-gated Ca2+ currents heterologously expressed in Xenopus oocytes.
      Alomone Labs Azelnidipine inhibits L-type voltage-gated Ca2+ currents heterologously expressed in Xenopus oocytes.
      A. Time course of CaV1.2/α2-δ1/β2a (L-type) current inhibition by 10 and 100 µM Azelnidipine (#A-135). Currents were elicited by application of voltage steps from a holding potential of -100 mV to 0 mV (100 msec). B. Superimposed example traces of current responses before and during perfusion of 10 and 100 µM Azelnidipine as indicated.
    References - Scientific background
    1. Findeisen, F. et al. (2010) Channels (Austin) 4, 459.
    2. Godfraind, T. (2005) Philos. Trans. R. Soc. Lond. B. Biol. Sci. 360, 2259.
    3. Clunn, G.F. et al. (2010) Int. J. Cardiol. 139, 2.
    4. Furukawa, T. et al. (2009) Eur. J. Pharmacol. 613, 100.
    5. Hayashi, K. et al. (2010) Keio. J. Med. 59, 74.
    6. Zhu, H.L. et al. (2006) Br. J. Pharmacol. 149, 786.
    7. Li, D. et al. (2012) Chem. Pharm. Bull. 60, 995.
    8. Eguchi, K. et al. (2007) J. Cardiovasc. Pharmacol. 49, 394.
    Scientific background

    Both L-type (CaV1) and T-type (CaV3) voltage-gated Ca2+ channels are large (~0.5 MDa), transmembrane proteins which control the cellular influx of Ca2+ in response to electrical stimuli. While CaV1s require a strong depolarization (~+40 mV) to perform, a much weaker pulse (~-40 mV) is sufficient to activate CaV3s1.

    Ca2+ channel blockers (CCBs) are a diverse class of pharmaceutical agents, usually targeting L-type channels, of which dihydropyridines (DHPs) constitute a major subgroup2,3. Inhibitors of Ca2+-mediated smooth muscle contractions, CCBs produce vasodilation, thus therapeutically managing hypertension and coronary heart disease2.

    An antagonist of both CaV1 (all subtypes) and CaV3 (α1G and α1H subtypes)4, azelnidipine (AZL) is a DHP derivate5 known to target CaVs with an IC50 of 3 nM6. Its long-lasting interaction at multiple binding sites of L-type Ca2+ channels renders it resistant to S(-)-Bay K8644 (CaV1 channel agonist) activating effects, otherwise shown to counteract nifedipine-induced inhibition6; AZL thus confers significantly prolonged cardioactive time7. Its reduced side effects and improved cardiovagal baroreflex sensitivity (BRS) when clinically administered make ALZ's therapeutic benefits superior to that of the potent antihypertensive, amlodipine8. Additionally, ALZ possesses hydragogue, heart-protective, kidney-protective, and anti-arteriosclerosis capabilities7.

    Target L-type and T-type Ca2+ channels
    Last update: 24/12/2020

    Azelnidipine (#A-135) is a highly pure, synthetic, and biologically active compound.

    For research purposes only, not for human use
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