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Identification
Name Felodipine
Accession Number DB01023 (APRD00374)
Type small molecule
Groups approved
Description

Felodipine is a long-acting 1,4-dihydropyridine calcium channel blocker (CCB)b. It acts primarily on vascular smooth muscle cells by stabilizing voltage-gated L-type calcium channels in their inactive conformation. By inhibiting the influx of calcium in smooth muscle cells, felodipine prevents calcium-dependent myocyte contraction and vasoconstriction. Felodipine is the most potent CCB in use and is unique in that it exhibits fluorescent activity. In addition to binding to L-type calcium channels, felodipine binds to a number of calcium-binding proteins, exhibits competitive antagonism of the mineralcorticoid receptor, inhibits the activity of calmodulin-dependent cyclic nucleotide phosphodiesterase, and blocks calcium influx through voltage-gated T-type calcium channels. Felodipine is used to treat mild to moderate essential hypertension.
Structure Thumb
Download: MOL | SDF | SMILES | InChI
Display: 2D Structure | 3D Structure
Synonyms
  • Dl-Felodipine
  • Felodipina [INN-Spanish]
  • felodipine
  • Felodipine [Usan:Ban:Inn]
  • Felodipinum [INN-Latin]
Brand names
  • Agon
  • AGON SR
  • Feloday
  • Felodur ER
  • Felogard
  • Flodil
  • Hydac
  • Lexxel
  • Modip
  • Munobal
  • Munobal Retard
  • Penedil
  • Perfudal
  • Plandil
  • Plendil (AstraZeneca)
  • Plendil Depottab (AstraZeneca)
  • Plendil ER (AstraZeneca)
  • Plendil Retard (AstraZeneca)
  • Preslow
  • Prevex
  • Renedil
  • Splendil
Brand name mixtures
  • Lexxel (felodipine + enalapril maleate)
Categories
  • Antihypertensive Agents
  • Vasodilator Agents
  • Calcium Channel Blockers
  • Dihydropyridines
CAS number 72509-76-3
Weight Average: 384.254
Monoisotopic: 383.069113515
Chemical Formula C18H19Cl2NO4
InChI Key InChIKey=RZTAMFZIAATZDJ-UHFFFAOYSA-N
InChI
InChI=1S/C18H19Cl2NO4/c1-5-25-18(23)14-10(3)21-9(2)13(17(22)24-4)15(14)11-7-6-8-12(19)16(11)20/h6-8,15,21H,5H2,1-4H3
Plain Text
IUPAC Name
3-ethyl 5-methyl 4-(2,3-dichlorophenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate
SMILES
CCOC(=O)C1=C(C)NC(C)=C(C1C1=C(Cl)C(Cl)=CC=C1)C(=O)OC
Plain Text
Mass Spec Not Available
Taxonomy
Kingdom Organic
Classes
  • Dihydropyridines
  • Carboxylic Acids and Derivatives
  • Benzene and Derivatives
  • Halobenzenes
Substructures
  • Dihydropyridines
  • Carboxylic Acids and Derivatives
  • Acetates
  • Ethers
  • Benzene and Derivatives
  • Aryl Halides
  • Halobenzenes
  • Enamines
  • Heterocyclic compounds
  • Aromatic compounds
Pharmacology
Indication For the treatment of mild to moderate essential hypertension.
Pharmacodynamics Felodipine belongs to the dihydropyridine (DHP) class of calcium channel blockers (CCBs), the most widely used class of CCBs. There are at least five different types of calcium channels in Homo sapiens: L-, N-, P/Q-, R- and T-type. It was widely accepted that CCBs target L-type calcium channels, the major channel in muscle cells that mediates contraction; however, some studies have shown that felodipine also binds to and inhibits T-type calcium channels. T-type calcium channels are most commonly found on neurons, cells with pacemaker activity and on osteocytes. The pharmacologic significance of T-type calcium channel blockade is unknown. Felodipine also binds to calmodulin and inhibits calmodulin-dependent calcium release from the sarcoplasmic reticulum. The effect of this interaction appears to be minor. Another study demonstrated that felodipine attenuates the activity of calmodulin-dependent cyclic nucleotide phosphodiesterase (CaMPDE) by binding to the PDE-1B1 and PDE-1A2 enzyme subunits. CaMPDE is one of the key enzymes involved in cyclic nucleotides and calcium second messenger systems. Felodipine also acts as an antagonist to the mineralcorticoid receptor by competing with aldosterone for binding and blocking aldosterone-induced coactivator recruitment of the mineralcorticoid receptor. Felodipine is able to bind to skeletal and cardiac muscle isoforms of troponin C, one of the key regulatory proteins in muscle contraction. Though felodipine exhibits binding to many endogenous molecules, its vasodilatory effects are still thought to be brought about primarily through inhibition of voltage-gated L-type calcium channels. Similar to other DHP CCBs, felodipine binds directly to inactive calcium channels stabilizing their inactive conformation. Since arterial smooth muscle depolarizations are longer in duration than cardiac muscle depolarizations, inactive channels are more prevalent in smooth muscle cells. Alternative splicing of the alpha-1 subunit of the channel gives felodipine additional arterial selectivity. At therapeutic sub-toxic concentrations, felodipine has little effect on cardiac myocytes and conduction cells.
Mechanism of action Felodipine decreases arterial smooth muscle contractility and subsequent vasoconstriction by inhibiting the influx of calcium ions through voltage-gated L-type calcium channels. It reversibly competes against nitrendipine and other DHP CCBs for DHP binding sites in vascular smooth muscle and cultured rabbit atrial cells. Calcium ions entering the cell through these channels bind to calmodulin. Calcium-bound calmodulin then binds to and activates myosin light chain kinase (MLCK). Activated MLCK catalyzes the phosphorylation of the regulatory light chain subunit of myosin, a key step in muscle contraction. Signal amplification is achieved by calcium-induced calcium release from the sarcoplasmic reticulum through ryanodine receptors. Inhibition of the initial influx of calcium decreases the contractile activity of arterial smooth muscle cells and results in vasodilation. The vasodilatory effects of felodipine result in an overall decrease in blood pressure. Felodipine may be used to treat mild to moderate essential hypertension.
Absorption Is completely absorbed from the gastrointestinal tract; however, extensive first-pass metabolism through the portal circulation results in a low systemic availability of 15%. Bioavailability is unaffected by food.
Volume of distribution
  • 10 L/kg
Protein binding 99%, primarily to the albumin fraction.
Metabolism

Hepatic metabolism primarily via cytochrome P450 3A4. Six metabolites with no appreciable vasodilatory effects have been identified.

Enzyme Metabolite Reaction Km Vmax
Cytochrome P450 3A4 dehydrofelodipine oxidation 26.4 103.58
Route of elimination Although higher concentrations of the metabolites are present in the plasma due to decreased urinary excretion, these are inactive. Animal studies have demonstrated that felodipine crosses the blood-brain barrier and the placenta.
Half life 17.5-31.5 hours in hypertensive patients; 19.1-35.9 hours in elderly hypertensive patients; 8.5-19.7 in healthy volunteers.
Clearance
  • 0.8 L/min [Young healthy subjects]
Toxicity Symptoms of overdose include excessive peripheral vasodilation with marked hypotension and possibly bradycardia. Oral rat LD50 is 1050 mg/kg.
Affected organisms
  • Humans and other mammals
Pathways
Pathway Name SMPDB ID
Smp00377 Felodipine Pathway SMP00377
Pharmacoeconomics
Manufacturers
  • Mutual pharmaceutical co inc
  • Mylan pharmaceuticals inc
  • Astrazeneca pharmaceuticals lp
Packagers
Dosage forms
Form Route Strength
Tablet, extended release Oral 10 mg
Tablet, extended release Oral 2.5 mg
Tablet, extended release Oral 5 mg
Prices
Unit description Cost Unit
Plendil 10 mg 24 Hour tablet 3.17 USD tablet
Plendil er 10 mg tablet 3.05 USD tablet
Plendil 10 mg tablet sa 2.96 USD tablet
Felodipine 10 mg 24 Hour tablet 2.95 USD tablet
Plendil er 2.5 mg tablet 2.94 USD tablet
Felodipine er 10 mg tablet 2.72 USD tablet
Plendil er 5 mg tablet 2.6 USD tablet
Plendil 5 mg 24 Hour tablet 1.77 USD tablet
Plendil 2.5 mg 24 Hour tablet 1.76 USD tablet
Felodipine 5 mg 24 Hour tablet 1.67 USD tablet
Plendil 2.5 mg tablet sa 1.65 USD tablet
Plendil 5 mg tablet sa 1.65 USD tablet
Felodipine 2.5 mg 24 Hour tablet 1.57 USD tablet
Felodipine er 2.5 mg tablet 1.51 USD tablet
Felodipine er 5 mg tablet 1.51 USD tablet
Renedil 10 mg Extended-Release Tablet 1.22 USD tablet
Plendil 10 mg Extended-Release Tablet 1.15 USD tablet
Renedil 5 mg Extended-Release Tablet 0.81 USD tablet
Plendil 5 mg Extended-Release Tablet 0.77 USD tablet
Sandoz Felodipine 10 mg Extended-Release Tablet 0.73 USD tablet
Renedil 2.5 mg Extended-Release Tablet 0.6 USD tablet
Plendil 2.5 mg Extended-Release Tablet 0.57 USD tablet
Sandoz Felodipine 5 mg Extended-Release Tablet 0.48 USD tablet
Patents Not Available
Properties
State solid
Melting point 145oC
Experimental Properties
Property Value Source
water solubility 19.7 mg/L PhysProp
logP 3.8 PhysProp
Caco2 permeability -4.64 [ADME Research, USCD] BiGG
Predicted Properties
Property Value Source
water solubility 7.15e-03 g/l ALOGPS
logP 4.36 ALOGPS
logP 3.44 ChemAxon Molconvert
logS -4.73 ALOGPS
pKa ChemAxon Molconvert
hydrogen acceptor count 3 ChemAxon Molconvert
hydrogen donor count 1 ChemAxon Molconvert
polar surface area 64.63 ChemAxon Molconvert
rotatable bond count 6 ChemAxon Molconvert
refractivity 99.20 ChemAxon Molconvert
polarizability 38.04 ChemAxon Molconvert
References
Synthesis Reference Not Available
General Reference
  1. Dunselman PH, Edgar B: Felodipine clinical pharmacokinetics. Clin Pharmacokinet. 1991 Dec;21(6):418-30. Pubmed
External Links
Resource Link
KEGG Drug D00319 Link_out
PubChem Compound 3333 Link_out
PubChem Substance 46506968 Link_out
ChemSpider 3216 Link_out
BindingDB 50017710 Link_out
ChEBI 585948 Link_out
ChEMBL 585948 Link_out
Therapeutic Targets Database DAP000487 Link_out
Drug Product Database 2222000 Link_out
RxList http://www.rxlist.com/cgi/generic2/felo.htm Link_out
Drugs.com http://www.drugs.com/cdi/felodipine.html Link_out
PDRhealth http://www.pdrhealth.com/drugs/rx/rx-mono.aspx?contentFileName=ple1339.html&contentName=Plendil&contentId=593 Link_out
Wikipedia http://en.wikipedia.org/wiki/Felodipine Link_out
ATC Codes
  • C08CA02
AHFS Codes
  • 24:28.08
PDB Entries Not Available
FDA label show (227.5 KB)
MSDS show (55.4 KB)
Interactions
Drug Interactions Not Available
Food Interactions
  • Grapefruit down regulates post-translational expression of CYP3A4, the major metabolizing enzyme of nifedipine. Grapefruit, in all forms (e.g. whole fruit, juice and rind), can significantly increase serum levels of nifedipine and may cause toxicity. Avoid grapefruit products while on this medication.
  • Take without regard to meals.
Targets

1. Voltage-dependent L-type calcium channel subunit alpha-1C

Pharmacological action: yes
Actions: inhibitor

Voltage-sensitive calcium channels (VSCC) mediate the entry of calcium ions into excitable cells and are also involved in a variety of calcium-dependent processes, including muscle contraction, hormone or neurotransmitter release, gene expression, cell motility, cell division and cell death. The isoform alpha-1C gives rise to L-type calcium currents. Long-lasting (L-type) calcium channels belong to the "high-voltage activated" (HVA) group. They are blocked by dihydropyridines (DHP), phenylalkylamines, benzothiazepines, and by omega-agatoxin-IIIA (omega-Aga-IIIA). They are however insensitive to omega-conotoxin- GVIA (omega-CTx-GVIA) and omega-agatoxin-IVA (omega-Aga-IVA). Calcium channels containing the alpha-1C subunit play an important role in excitation-contraction coupling in the heart. The various isoforms display marked differences in the sensitivity to DHP compounds

Organism class: human
UniProt ID: Q13936 Link_out
Gene: CACNA1C Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Chen X, Ji ZL, Chen YZ: TTD: Therapeutic Target Database. Nucleic Acids Res. 2002 Jan 1;30(1):412-5. Pubmed
  2. Furukawa T, Yamakawa T, Midera T, Sagawa T, Mori Y, Nukada T: Selectivities of dihydropyridine derivatives in blocking Ca(2+) channel subtypes expressed in Xenopus oocytes. J Pharmacol Exp Ther. 1999 Nov;291(2):464-73. Pubmed
  3. Striessnig, J. (2004). Ca 2+ channel blockers. In S. Offermanns, & W. Rosenthal (Eds.). Encyclopedic reference of molecular pharmacology (pp. 201-207). Berlin, Germany: Springer.
  4. Zahradnikova A, Minarovic I, Zahradnik I: Competitive and cooperative effects of Bay K8644 on the L-type calcium channel current inhibition by calcium channel antagonists. J Pharmacol Exp Ther. 2007 Aug;322(2):638-45. Epub 2007 May 2. Pubmed

2. Voltage-dependent calcium channel subunit alpha-2/delta-1

Pharmacological action: yes
Actions: inhibitor

Calcium channel protein which plays an important role in excitation-contraction coupling

Organism class: human
UniProt ID: P54289 Link_out
Gene: CACNA2D1 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Chen X, Ji ZL, Chen YZ: TTD: Therapeutic Target Database. Nucleic Acids Res. 2002 Jan 1;30(1):412-5. Pubmed
  2. Furukawa T, Yamakawa T, Midera T, Sagawa T, Mori Y, Nukada T: Selectivities of dihydropyridine derivatives in blocking Ca(2+) channel subtypes expressed in Xenopus oocytes. J Pharmacol Exp Ther. 1999 Nov;291(2):464-73. Pubmed
  3. Striessnig, J. (2004). Ca 2+ channel blockers. In S. Offermanns, & W. Rosenthal (Eds.). Encyclopedic reference of molecular pharmacology (pp. 201-207). Berlin, Germany: Springer.
  4. Zahradnikova A, Minarovic I, Zahradnik I: Competitive and cooperative effects of Bay K8644 on the L-type calcium channel current inhibition by calcium channel antagonists. J Pharmacol Exp Ther. 2007 Aug;322(2):638-45. Epub 2007 May 2. Pubmed

3. Voltage-dependent L-type calcium channel subunit beta-2

Pharmacological action: yes
Actions: inhibitor

The beta subunit of voltage-dependent calcium channels contributes to the function of the calcium channel by increasing peak calcium current, shifting the voltage dependencies of activation and inactivation, modulating G protein inhibition and controlling the alpha-1 subunit membrane targeting

Organism class: human
UniProt ID: Q08289 Link_out
Gene: CACNB2 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Chen X, Ji ZL, Chen YZ: TTD: Therapeutic Target Database. Nucleic Acids Res. 2002 Jan 1;30(1):412-5. Pubmed
  2. Furukawa T, Yamakawa T, Midera T, Sagawa T, Mori Y, Nukada T: Selectivities of dihydropyridine derivatives in blocking Ca(2+) channel subtypes expressed in Xenopus oocytes. J Pharmacol Exp Ther. 1999 Nov;291(2):464-73. Pubmed
  3. Striessnig, J. (2004). Ca 2+ channel blockers. In S. Offermanns, & W. Rosenthal (Eds.). Encyclopedic reference of molecular pharmacology (pp. 201-207). Berlin, Germany: Springer.
  4. Zahradnikova A, Minarovic I, Zahradnik I: Competitive and cooperative effects of Bay K8644 on the L-type calcium channel current inhibition by calcium channel antagonists. J Pharmacol Exp Ther. 2007 Aug;322(2):638-45. Epub 2007 May 2. Pubmed

4. Voltage-dependent L-type calcium channel subunit alpha-1D

Pharmacological action: yes
Actions: inhibitor

Voltage-sensitive calcium channels (VSCC) mediate the entry of calcium ions into excitable cells and are also involved in a variety of calcium-dependent processes, including muscle contraction, hormone or neurotransmitter release, gene expression, cell motility, cell division and cell death. The isoform alpha-1D gives rise to L-type calcium currents. Long-lasting (L-type) calcium channels belong to the "high-voltage activated" (HVA) group. They are blocked by dihydropyridines (DHP), phenylalkylamines, benzothiazepines, and by omega-agatoxin-IIIA (omega-Aga-IIIA). They are however insensitive to omega-conotoxin- GVIA (omega-CTx-GVIA) and omega-agatoxin-IVA (omega-Aga-IVA)

Organism class: human
UniProt ID: Q01668 Link_out
Gene: CACNA1D Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Sinnegger-Brauns MJ, Huber IG, Koschak A, Wild C, Obermair GJ, Einzinger U, Hoda JC, Sartori SB, Striessnig J: Expression and 1,4-dihydropyridine-binding properties of brain L-type calcium channel isoforms. Mol Pharmacol. 2009 Feb;75(2):407-14. Epub 2008 Nov 24. Pubmed

5. Voltage-dependent L-type calcium channel subunit alpha-1S

Pharmacological action: yes
Actions: inhibitor

Voltage-sensitive calcium channels (VSCC) mediate the entry of calcium ions into excitable cells and are also involved in a variety of calcium-dependent processes, including muscle contraction, hormone or neurotransmitter release, gene expression, cell motility, cell division and cell death. The isoform alpha-1S gives rise to L-type calcium currents. Long-lasting (L-type) calcium channels belong to the "high-voltage activated" (HVA) group. They are blocked by dihydropyridines (DHP), phenylalkylamines, benzothiazepines, and by omega-agatoxin-IIIA (omega-Aga-IIIA). They are however insensitive to omega-conotoxin- GVIA (omega-CTx-GVIA) and omega-agatoxin-IVA (omega-Aga-IVA). Calcium channels containing the alpha-1S subunit play an important role in excitation-contraction coupling in skeletal muscle

Organism class: human
UniProt ID: Q13698 Link_out
Gene: CACNA1S Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Peterson BZ, Catterall WA: Allosteric interactions required for high-affinity binding of dihydropyridine antagonists to Ca(V)1.1 Channels are modulated by calcium in the pore. Mol Pharmacol. 2006 Aug;70(2):667-75. Epub 2006 May 4. Pubmed

6. Voltage-dependent T-type calcium channel subunit alpha-1H

Pharmacological action: unknown
Actions: inhibitor

Voltage-sensitive calcium channels (VSCC) mediate the entry of calcium ions into excitable cells and are also involved in a variety of calcium-dependent processes, including muscle contraction, hormone or neurotransmitter release, gene expression, cell motility, cell division and cell death. The isoform alpha-1H gives rise to T-type calcium currents. T-type calcium channels belong to the "low-voltage activated (LVA)" group and are strongly blocked by nickel and mibefradil. A particularity of this type of channels is an opening at quite negative potentials, and a voltage-dependent inactivation. T-type channels serve pacemaking functions in both central neurons and cardiac nodal cells and support calcium signaling in secretory cells and vascular smooth muscle. They may also be involved in the modulation of firing patterns of neurons which is important for information processing as well as in cell growth processes

Organism class: human
UniProt ID: O95180 Link_out
Gene: CACNA1H Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Cohen CJ, Spires S, Van Skiver D: Block of T-type Ca channels in guinea pig atrial cells by antiarrhythmic agents and Ca channel antagonists. J Gen Physiol. 1992 Oct;100(4):703-28. Pubmed
  2. Perez-Reyes E, Van Deusen AL, Vitko I: Molecular pharmacology of human Cav3.2 T-type Ca2+ channels: block by antihypertensives, antiarrhythmics, and their analogs. J Pharmacol Exp Ther. 2009 Feb;328(2):621-7. Epub 2008 Oct 30. Pubmed

7. Voltage-dependent calcium channel subunit alpha-2/delta-2

Pharmacological action: unknown
Actions: inhibitor
Organism class: human
UniProt ID: Q9NY47 Link_out
Gene: CACNA2D2
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Cohen CJ, Spires S, Van Skiver D: Block of T-type Ca channels in guinea pig atrial cells by antiarrhythmic agents and Ca channel antagonists. J Gen Physiol. 1992 Oct;100(4):703-28. Pubmed
  2. Perez-Reyes E, Van Deusen AL, Vitko I: Molecular pharmacology of human Cav3.2 T-type Ca2+ channels: block by antihypertensives, antiarrhythmics, and their analogs. J Pharmacol Exp Ther. 2009 Feb;328(2):621-7. Epub 2008 Oct 30. Pubmed

8. Calmodulin

Pharmacological action: unknown
Actions: other

Calmodulin mediates the control of a large number of enzymes and other proteins by Ca(2+). Among the enzymes to be stimulated by the calmodulin-Ca(2+) complex are a number of protein kinases and phosphatases

Organism class: human
UniProt ID: P62158 Link_out
Gene: CALM1 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Bostrom SL, Westerlund C, Rochester S, Vogel HJ: Binding of a dihydropyridine felodipine-analogue to calmodulin and related calcium-binding proteins. Biochem Pharmacol. 1988 Oct 1;37(19):3723-8. Pubmed
  2. Johnson JD, Andrews CT, Khabbaza EJ, Mills JS: The interaction of felodipine with calcium-binding proteins. J Cardiovasc Pharmacol. 1987;10 Suppl 1:S53-9. Pubmed
  3. Lamers JM, Cysouw KJ, Verdouw PD: Slow calcium channel blockers and calmodulin. Effect of felodipine, nifedipine, prenylamine and bepridil on cardiac sarcolemmal calcium pumping ATPase. Biochem Pharmacol. 1985 Nov 1;34(21):3837-43. Pubmed
  4. Lamers JM, Verdouw PD, Mas-Oliva J: The effects of felodipine and bepridil on calcium-stimulated calmodulin binding and calcium pumping ATPase of cardiac sarcolemma before and after removal of endogenous calmodulin. Mol Cell Biochem. 1987 Dec;78(2):169-76. Pubmed
  5. Mills JS, Bailey BL, Johnson JD: Cooperativity among calmodulin’s drug binding sites. Biochemistry. 1985 Aug 27;24(18):4897-902. Pubmed
  6. Walsh MP, Sutherland C, Scott-Woo GC: Effects of felodipine (a dihydropyridine calcium channel blocker) and analogues on calmodulin-dependent enzymes. Biochem Pharmacol. 1988 Apr 15;37(8):1569-80. Pubmed

9. Calcium/calmodulin-dependent 3',5'-cyclic nucleotide phosphodiesterase 1B

Pharmacological action: unknown
Actions: inhibitor

Has a preference for cGMP as a substrate

Organism class: human
UniProt ID: Q01064 Link_out
Gene: PDE1B
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Lamers JM, Cysouw KJ, Verdouw PD: Slow calcium channel blockers and calmodulin. Effect of felodipine, nifedipine, prenylamine and bepridil on cardiac sarcolemmal calcium pumping ATPase. Biochem Pharmacol. 1985 Nov 1;34(21):3837-43. Pubmed
  2. Sharma RK, Wang JH, Wu Z: Mechanisms of inhibition of calmodulin-stimulated cyclic nucleotide phosphodiesterase by dihydropyridine calcium antagonists. J Neurochem. 1997 Aug;69(2):845-50. Pubmed

10. Calcium/calmodulin-dependent 3',5'-cyclic nucleotide phosphodiesterase 1A

Pharmacological action: unknown
Actions: inhibitor

Has a higher affinity for cGMP than for cAMP

Organism class: human
UniProt ID: P54750 Link_out
Gene: PDE1A Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Lamers JM, Cysouw KJ, Verdouw PD: Slow calcium channel blockers and calmodulin. Effect of felodipine, nifedipine, prenylamine and bepridil on cardiac sarcolemmal calcium pumping ATPase. Biochem Pharmacol. 1985 Nov 1;34(21):3837-43. Pubmed
  2. Sharma RK, Wang JH, Wu Z: Mechanisms of inhibition of calmodulin-stimulated cyclic nucleotide phosphodiesterase by dihydropyridine calcium antagonists. J Neurochem. 1997 Aug;69(2):845-50. Pubmed

11. Mineralocorticoid receptor

Pharmacological action: unknown
Actions: antagonist

Receptor for both mineralocorticoids (MC) such as aldosterone and glucocorticoids (GC) such as corticosterone or cortisol. Binds to mineralocorticoid response elements (MRE) and transactivates target genes. The effect of MC is to increase ion and water transport and thus raise extracellular fluid volume and blood pressure and lower potassium levels

Organism class: human
UniProt ID: P08235 Link_out
Gene: NR3C2 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Dietz JD, Du S, Bolten CW, Payne MA, Xia C, Blinn JR, Funder JW, Hu X: A number of marketed dihydropyridine calcium channel blockers have mineralocorticoid receptor antagonist activity. Hypertension. 2008 Mar;51(3):742-8. Epub 2008 Feb 4. Pubmed

12. Troponin C, skeletal muscle

Pharmacological action: unknown
Actions: other

Troponin is the central regulatory protein of striated muscle contraction. Tn consists of three components:Tn-I which is the inhibitor of actomyosin ATPase, Tn-T which contains the binding site for tropomyosin and Tn-C. The binding of calcium to Tn-C abolishes the inhibitory action of Tn on actin filaments

Organism class: human
UniProt ID: P02585 Link_out
Gene: TNNC2 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Bostrom SL, Westerlund C, Rochester S, Vogel HJ: Binding of a dihydropyridine felodipine-analogue to calmodulin and related calcium-binding proteins. Biochem Pharmacol. 1988 Oct 1;37(19):3723-8. Pubmed
  2. Berman HM, Westbrook J, Feng Z, Gilliland G, Bhat TN, Weissig H, Shindyalov IN, Bourne PE: The Protein Data Bank. Nucleic Acids Res. 2000 Jan 1;28(1):235-42. Pubmed

13. Troponin C, slow skeletal and cardiac muscles

Pharmacological action: unknown
Actions: other

Troponin is the central regulatory protein of striated muscle contraction. Tn consists of three components:Tn-I which is the inhibitor of actomyosin ATPase, Tn-T which contains the binding site for tropomyosin and Tn-C. The binding of calcium to Tn-C abolishes the inhibitory action of Tn on actin filaments

Organism class: human
UniProt ID: P63316 Link_out
Gene: TNNC1 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Bostrom SL, Westerlund C, Rochester S, Vogel HJ: Binding of a dihydropyridine felodipine-analogue to calmodulin and related calcium-binding proteins. Biochem Pharmacol. 1988 Oct 1;37(19):3723-8. Pubmed
Enzymes

1. Cytochrome P450 3A4

Actions: substrate, inhibitor

Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It performs a variety of oxidation reactions (e.g. caffeine 8-oxidation, omeprazole sulphoxidation, midazolam 1'-hydroxylation and midazolam 4- hydroxylation) of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics. The enzyme also hydroxylates etoposide

UniProt ID: P08684 Link_out
Gene: CYP3A4
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. AstraZeneca LP. Plendil® (felodipine) extended-release tablets prescribing information. Wilmington, DE; 2003 Nov.
  2. Flockhart DA. Drug Interactions: Cytochrome P450 Drug Interaction Table. Indiana University School of Medicine (2007). Accessed May 28, 2010.
  3. Preissner S, Kroll K, Dunkel M, Senger C, Goldsobel G, Kuzman D, Guenther S, Winnenburg R, Schroeder M, Preissner R: SuperCYP: a comprehensive database on Cytochrome P450 enzymes including a tool for analysis of CYP-drug interactions. Nucleic Acids Res. 2010 Jan;38(Database issue):D237-43. Epub 2009 Nov 24. Pubmed
  4. Galetin A, Clarke SE, Houston JB: Quinidine and haloperidol as modifiers of CYP3A4 activity: multisite kinetic model approach. Drug Metab Dispos. 2002 Dec;30(12):1512-22. Pubmed

2. Cytochrome P450 3A5

Actions: substrate

Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It oxidizes a variety of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics

UniProt ID: P20815 Link_out
Gene: CYP3A5 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Flockhart DA. Drug Interactions: Cytochrome P450 Drug Interaction Table. Indiana University School of Medicine (2007). Accessed May 28, 2010.

3. Cytochrome P450 3A7

Actions: substrate

Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It oxidizes a variety of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics

UniProt ID: P24462 Link_out
Gene: CYP3A7 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Flockhart DA. Drug Interactions: Cytochrome P450 Drug Interaction Table. Indiana University School of Medicine (2007). Accessed May 28, 2010.

4. Cytochrome P450 2C8

Actions: inhibitor

Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It oxidizes a variety of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics. In the epoxidation of arachidonic acid it generates only 14,15- and 11,12-cis-epoxyeicosatrienoic acids. It is the principal enzyme responsible for the metabolism the anti- cancer drug paclitaxel (taxol)

UniProt ID: P10632 Link_out
Gene: CYP2C8
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Schoch GA, Yano JK, Sansen S, Dansette PM, Stout CD, Johnson EF: Determinants of cytochrome P450 2C8 substrate binding: structures of complexes with montelukast, troglitazone, felodipine, and 9-cis-retinoic acid. J Biol Chem. 2008 Jun 20;283(25):17227-37. Epub 2008 Apr 15. Pubmed
  2. Walsky RL, Gaman EA, Obach RS: Examination of 209 drugs for inhibition of cytochrome P450 2C8. J Clin Pharmacol. 2005 Jan;45(1):68-78. Pubmed
  3. Preissner S, Kroll K, Dunkel M, Senger C, Goldsobel G, Kuzman D, Guenther S, Winnenburg R, Schroeder M, Preissner R: SuperCYP: a comprehensive database on Cytochrome P450 enzymes including a tool for analysis of CYP-drug interactions. Nucleic Acids Res. 2010 Jan;38(Database issue):D237-43. Epub 2009 Nov 24. Pubmed

5. Cytochrome P450 2C9

Actions: inhibitor

Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It oxidizes a variety of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics. This enzyme contributes to the wide pharmacokinetics variability of the metabolism of drugs such as S- warfarin, diclofenac, phenytoin, tolbutamide and losartan

UniProt ID: P11712 Link_out
Gene: CYP2C9
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Preissner S, Kroll K, Dunkel M, Senger C, Goldsobel G, Kuzman D, Guenther S, Winnenburg R, Schroeder M, Preissner R: SuperCYP: a comprehensive database on Cytochrome P450 enzymes including a tool for analysis of CYP-drug interactions. Nucleic Acids Res. 2010 Jan;38(Database issue):D237-43. Epub 2009 Nov 24. Pubmed

6. Cytochrome P450 2D6

Actions: inhibitor

Responsible for the metabolism of many drugs and environmental chemicals that it oxidizes. It is involved in the metabolism of drugs such as antiarrhythmics, adrenoceptor antagonists, and tricyclic antidepressants

UniProt ID: P10635 Link_out
Gene: CYP2D6 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Preissner S, Kroll K, Dunkel M, Senger C, Goldsobel G, Kuzman D, Guenther S, Winnenburg R, Schroeder M, Preissner R: SuperCYP: a comprehensive database on Cytochrome P450 enzymes including a tool for analysis of CYP-drug interactions. Nucleic Acids Res. 2010 Jan;38(Database issue):D237-43. Epub 2009 Nov 24. Pubmed
Transporters

1. Multidrug resistance protein 1

Actions: inhibitor

Energy-dependent efflux pump responsible for decreased drug accumulation in multidrug-resistant cells

UniProt ID: P08183 Link_out
Gene: ABCB1 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Wang EJ, Casciano CN, Clement RP, Johnson WW: Active transport of fluorescent P-glycoprotein substrates: evaluation as markers and interaction with inhibitors. Biochem Biophys Res Commun. 2001 Nov 30;289(2):580-5. Pubmed
Comments
Drug created on June 13, 2005 07:24 / Updated on April 19, 2011 15:08

This project is supported by Genome Alberta & Genome Canada, a not-for-profit organization that is leading Canada's national genomics strategy with $600 million in funding from the federal government. This project is also supported in part by GenomeQuest, Inc., an enterprise genomic information company serving the life science community.