Date published: 2025-11-8

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(R)-(+)-Bay K 8644 (CAS 98791-67-4)

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Alternate Names:
(4R)-1,4-Dihydro-2,6-dimethyl-5-nitro-4-[2-trifluoromethyl)phenyl]-3-pyridinecarboxylic acid methyl ester
Application:
(R)-(+)-Bay K 8644 is an L-type calcium channel protein blocker
CAS Number:
98791-67-4
Molecular Weight:
356.30
Molecular Formula:
C16H15F3N2O4
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

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(R)-(+)-Bay K 8644 is a L-type calcium channel protein blocker with negative inotropic effects. (R)-(+)-Bay K 8644 is an enantiomer showing opposite effects to the racemate (±)-Bay K 8644 (sc-203324) and and (S)-(−)-Bay K8644 (sc-203525). Intracerebroventricular administration of this enantiomer has no effect on motor function in mice, whereas (−)-BAY-K-8644 impairs rotarod and motor activity, an effect that is blocked by (+)-BAY-K-8644.


(R)-(+)-Bay K 8644 (CAS 98791-67-4) References

  1. Disturbance of peristalsis in the guinea-pig isolated small intestine by indomethacin, but not cyclo-oxygenase isoform-selective inhibitors.  |  Shahbazian, A., et al. 2001. Br J Pharmacol. 132: 1299-309. PMID: 11250881
  2. Comparative behavioral, neurochemical and pharmacological activities of dihydropyridine calcium channel activating drugs.  |  O'Neill, SK., et al. 1990. J Pharmacol Exp Ther. 253: 905-12. PMID: 1694243
  3. Pharmacologic and radioligand binding analysis of the actions of 1,4-dihydropyridine activator-antagonist pairs in smooth muscle.  |  Wei, XY., et al. 1986. J Pharmacol Exp Ther. 239: 144-53. PMID: 2428971
  4. Enantiomer selectivity and the development of tolerance to the behavioral effects of the calcium channel activator BAY K 8644.  |  O'Neill, SK. and Bolger, GT. 1988. Brain Res Bull. 21: 865-72. PMID: 2465070
  5. L-type Ca2+ channel sparklets revealed by TIRF microscopy in mouse urinary bladder smooth muscle.  |  Sidaway, P. and Teramoto, N. 2014. PLoS One. 9: e93803. PMID: 24699670
  6. Modulation of solitarial deglutitive N-methyl-D-aspartate receptors by dihydropyridines.  |  Hashim, MA., et al. 1989. Neuropharmacology. 28: 923-9. PMID: 2478924
  7. L-type Ca2+ channel responses to bay k 8644 in stem cell-derived cardiomyocytes are unusually dependent on holding potential and charge carrier.  |  Ji, J., et al. 2014. Assay Drug Dev Technol. 12: 352-60. PMID: 25147907
  8. Diazepam is not a direct allosteric modulator of α1-adrenoceptors, but modulates receptor signaling by inhibiting phosphodiesterase-4.  |  Williams, LM., et al. 2019. Pharmacol Res Perspect. 7: e00455. PMID: 30619611
  9. Structural Basis of the Modulation of the Voltage-Gated Calcium Ion Channel Cav 1.1 by Dihydropyridine Compounds*.  |  Gao, S. and Yan, N. 2021. Angew Chem Int Ed Engl. 60: 3131-3137. PMID: 33125829
  10. Novel Fluorescence-Based High-Throughput FLIPR Assay Utilizing Membrane-Tethered Genetic Calcium Sensors to Identify T-Type Calcium Channel Modulators.  |  Zhang, YL., et al. 2022. ACS Pharmacol Transl Sci. 5: 156-168. PMID: 35311021
  11. Calcium channel 'agonist' BAY K 8644 inhibits calcium antagonist binding to brain and PC12 cell membranes.  |  Greenberg, DA., et al. 1984. Brain Res. 305: 365-8. PMID: 6204725
  12. Desensitization of the mu-opioid activation of phospholipase C in SH-SY5Y cells: the role of protein kinases C and A and Ca(2+)-activated K+ currents.  |  Smart, D. and Lambert, DG. 1995. Br J Pharmacol. 116: 2655-60. PMID: 8590985
  13. Localization of L-type Ca2+ channels at perisynaptic glial cells of the frog neuromuscular junction.  |  Robitaille, R., et al. 1996. J Neurosci. 16: 148-58. PMID: 8613781
  14. Attenuation of beta-amyloid neurotoxicity in vitro by potassium-induced depolarization.  |  Pike, CJ., et al. 1996. J Neurochem. 67: 1774-7. PMID: 8858966
  15. Activation by high potassium of a novel voltage-operated Ca2+ channel in rat spleen.  |  Ko, FN., et al. 1997. Br J Pharmacol. 120: 565-70. PMID: 9051291

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

(R)-(+)-Bay K 8644, 1 mg

sc-364594B
1 mg
$102.00

(R)-(+)-Bay K 8644, 10 mg

sc-364594
10 mg
$266.00

(R)-(+)-Bay K 8644, 50 mg

sc-364594A
50 mg
$1087.00