Target type: biologicalprocess
Any process that modulates the establishment or extent of a resting potential, the electrical charge across the plasma membrane, with the interior of the cell negative with respect to the exterior. The resting potential is the membrane potential of a cell that is not stimulated to be depolarized or hyperpolarized. [GOC:dph, GOC:ef, ISBN:0195088433]
The resting membrane potential (RMP) is a crucial electrical potential difference across the plasma membrane of a cell, maintained by the cell at rest. It is a fundamental property of all living cells, particularly important for nerve and muscle cells. The regulation of RMP involves a complex interplay of several factors, including ion concentration gradients, membrane permeability, and the activity of ion pumps and channels.
**1. Ion Concentration Gradients:**
- **Sodium (Na+) ions:** Higher concentration outside the cell.
- **Potassium (K+) ions:** Higher concentration inside the cell.
- **Chloride (Cl-) ions:** Higher concentration outside the cell.
- **Calcium (Ca2+) ions:** Higher concentration outside the cell.
**2. Membrane Permeability:**
- The plasma membrane is selectively permeable, allowing some ions to pass more easily than others.
- At rest, the membrane is more permeable to K+ than Na+.
- This differential permeability is due to the presence of various ion channels.
**3. Ion Pumps:**
- The sodium-potassium pump (Na+/K+ ATPase) actively pumps 3 Na+ ions out of the cell for every 2 K+ ions pumped into the cell.
- This pump requires energy (ATP) and maintains the concentration gradients of Na+ and K+ across the membrane.
**4. Ion Channels:**
- **Leak channels:** Always open, allowing ions to move passively down their concentration gradients.
- **Voltage-gated channels:** Open or close in response to changes in membrane potential.
- **Ligand-gated channels:** Open or close in response to the binding of specific molecules (ligands).
**Regulation of RMP:**
- The RMP is primarily determined by the movement of K+ ions through leak channels.
- K+ ions flow out of the cell due to their concentration gradient, making the inside of the cell more negative.
- This outward K+ current is balanced by a small inward Na+ current through leak channels.
- The pump continuously works to maintain the concentration gradients of Na+ and K+, which indirectly contributes to the RMP.
**Factors Influencing RMP:**
- **Temperature:** Higher temperature increases membrane permeability and ion movement, affecting RMP.
- **pH:** Changes in pH can affect the activity of ion pumps and channels, altering RMP.
- **Drugs and toxins:** Certain drugs and toxins can interfere with ion channel function or pump activity, disrupting RMP.
- **Cellular metabolism:** Metabolic processes can influence the concentration of ions and the availability of ATP, affecting RMP.
**Significance of RMP:**
- RMP is essential for generating and propagating action potentials in neurons and muscle cells.
- It provides a baseline electrical potential for cell signaling and communication.
- It plays a role in maintaining cell volume and shape.
**In summary, the resting membrane potential is a dynamic equilibrium maintained by a complex interplay of ion concentration gradients, membrane permeability, and the active transport of ions by pumps and channels. This delicate balance is crucial for cell function and communication.**'
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| Protein | Definition | Taxonomy |
|---|---|---|
| Presenilin-1 | A presenilin-1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P49768] | Homo sapiens (human) |
| Sodium/potassium-transporting ATPase subunit alpha-3 | A sodium/potassium-transporting ATPase subunit alpha-3 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P13637] | Homo sapiens (human) |
| Potassium channel subfamily K member 5 | A potassium channel subfamily K member 5 that is encoded in the genome of human. [PRO:WCB, UniProtKB:O95279] | Homo sapiens (human) |
| Potassium channel subfamily K member 3 | A potassium channel subfamily K member 3 that is encoded in the genome of human. [PRO:WCB, UniProtKB:O14649] | Homo sapiens (human) |
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| tocopheroxy radical | tocopheroxy radical: RN given refers to radical ion (1+), (2R-(2R*(4R*,8R*)))-isomer; RN for cpd without isomeric designation not available 12/90 | tocopherol | |
| bupivacaine | 1-butyl-N-(2,6-dimethylphenyl)piperidine-2-carboxamide : A piperidinecarboxamide obtained by formal condensation of the carboxy group of N-butylpipecolic acid with the amino group of 2,6-dimethylaniline. bupivacaine : A racemate composed of equimolar amounts of dextrobupivacaine and levobupivacaine. Used (in the form of its hydrochloride hydrate) as a local anaesthetic. Bupivacaine: A widely used local anesthetic agent. | aromatic amide; piperidinecarboxamide; tertiary amino compound | |
| lidocaine | lidocaine : The monocarboxylic acid amide resulting from the formal condensation of N,N-diethylglycine with 2,6-dimethylaniline. Lidocaine: A local anesthetic and cardiac depressant used as an antiarrhythmia agent. Its actions are more intense and its effects more prolonged than those of PROCAINE but its duration of action is shorter than that of BUPIVACAINE or PRILOCAINE. | benzenes; monocarboxylic acid amide; tertiary amino compound | anti-arrhythmia drug; drug allergen; environmental contaminant; local anaesthetic; xenobiotic |
| 7-amino-4-chloro-3-methoxy-2-benzopyran-1-one | isocoumarins | ||
| lansoprazole | Lansoprazole: A 2,2,2-trifluoroethoxypyridyl derivative of timoprazole that is used in the therapy of STOMACH ULCERS and ZOLLINGER-ELLISON SYNDROME. The drug inhibits H(+)-K(+)-EXCHANGING ATPASE which is found in GASTRIC PARIETAL CELLS. Lansoprazole is a racemic mixture of (R)- and (S)-isomers. | benzimidazoles; pyridines; sulfoxide | anti-ulcer drug; EC 3.6.3.10 (H(+)/K(+)-exchanging ATPase) inhibitor |
| mepivacaine | mepivacaine : A piperidinecarboxamide in which N-methylpipecolic acid and 2,6-dimethylaniline have combined to form the amide bond. It is used as a local amide-type anaesthetic. Mepivacaine: A local anesthetic that is chemically related to BUPIVACAINE but pharmacologically related to LIDOCAINE. It is indicated for infiltration, nerve block, and epidural anesthesia. Mepivacaine is effective topically only in large doses and therefore should not be used by this route. (From AMA Drug Evaluations, 1994, p168) | piperidinecarboxamide | drug allergen; local anaesthetic |
| mexiletine | mexiletine : An aromatic ether which is 2,6-dimethylphenyl ether of 2-aminopropan-1-ol. Mexiletine: Antiarrhythmic agent pharmacologically similar to LIDOCAINE. It may have some anticonvulsant properties. | aromatic ether; primary amino compound | anti-arrhythmia drug |
| omeprazole | 5-methoxy-2-{[(4-methoxy-3,5-dimethylpyridin-2-yl)methyl]sulfinyl}-1H-benzimidazole : A member of the class of benzimidazoles that is 1H-benzimidazole which is substituted by a [4-methoxy-3,5-dimethylpyridin-2-yl)methyl]sulfinyl group at position 2 and a methoxy group at position 5. omeprazole : A racemate comprising equimolar amounts of (R)- and (S)-omeprazole. Omeprazole: A 4-methoxy-3,5-dimethylpyridyl, 5-methoxybenzimidazole derivative of timoprazole that is used in the therapy of STOMACH ULCERS and ZOLLINGER-ELLISON SYNDROME. The drug inhibits an H(+)-K(+)-EXCHANGING ATPASE which is found in GASTRIC PARIETAL CELLS. | aromatic ether; benzimidazoles; pyridines; sulfoxide | |
| pantoprazole | pantoprazole : A member of the class of benzimidazoles that is 1H-benzimidazole substituted by a difluoromethoxy group at position 5 and a [(3,4-dimethoxypyridin-2-yl)methyl]sulfinyl group at position 2. Pantoprazole: 2-pyridinylmethylsulfinylbenzimidazole proton pump inhibitor that is used in the treatment of GASTROESOPHAGEAL REFLUX and PEPTIC ULCER. | aromatic ether; benzimidazoles; organofluorine compound; pyridines; sulfoxide | anti-ulcer drug; EC 3.6.3.10 (H(+)/K(+)-exchanging ATPase) inhibitor; environmental contaminant; xenobiotic |
| propafenone | propafenone : An aromatic ketone that is 3-(propylamino)propane-1,2-diol in which the hydrogen of the primary hydroxy group is replaced by a 2-(3-phenylpropanoyl)phenyl group. It is a class 1C antiarrhythmic drug with local anesthetic effects, and is used as the hydrochloride salt in the management of supraventricular and ventricular arrhythmias. Propafenone: An antiarrhythmia agent that is particularly effective in ventricular arrhythmias. It also has weak beta-blocking activity. | aromatic ketone; secondary alcohol; secondary amino compound | anti-arrhythmia drug |
| tetracaine | tetracaine : A benzoate ester in which 4-N-butylbenzoic acid and 2-(dimethylamino)ethanol have combined to form the ester bond; a local ester anaesthetic (ester caine) used for surface and spinal anaesthesia. Tetracaine: A potent local anesthetic of the ester type used for surface and spinal anesthesia. | benzoate ester; tertiary amino compound | local anaesthetic |
| etidocaine | etidocaine : An amino acid amide in which 2-[ethyl(propyl)amino]butanoic acid and 2,6-dimethylaniline have combined to form the amide bond. Used as a local anaesthetic (amide caine), it has rapid onset and long action properties, similar to bupivacaine, and is given by injection during surgical procedures and during labour and delivery. Etidocaine: A local anesthetic with rapid onset and long action, similar to BUPIVACAINE. | amino acid amide | local anaesthetic |
| tarenflurbil | tarenflurbil: R-enantiomer of flurbiprofen but not a COX inhibitor; modulates NF-kB, gamma-secretase, amyloid beta-protein; | flurbiprofen | |
| cholanic acid | 5beta-cholanic acids; cholanic acid | ||
| rostafuroxin | rostafuroxin: structure in first source | ||
| ropivacaine | (S)-ropivacaine : A piperidinecarboxamide-based amide-type local anaesthetic (amide caine) in which (S)-N-propylpipecolic acid and 2,6-dimethylaniline are combined to form the amide bond. ropivacaine : The piperidinecarboxamide obtained by the formal condensation of N-propylpipecolic acid and 2,6-dimethylaniline. Ropivacaine: An anilide used as a long-acting local anesthetic. It has a differential blocking effect on sensory and motor neurons. | piperidinecarboxamide; ropivacaine | local anaesthetic |
| ouabain | cardiac glycoside : Steroid lactones containing sugar residues that act on the contractile force of the cardiac muscles. ouabain : A steroid hormone that is a multi-hydroxylated alpha-L-rhamnosyl cardenoloide. It binds to and inhibits the plasma membrane Na(+)/K(+)-ATPase (sodium pump). It has been isolated naturally from Strophanthus gratus. Ouabain: A cardioactive glycoside consisting of rhamnose and ouabagenin, obtained from the seeds of Strophanthus gratus and other plants of the Apocynaceae; used like DIGITALIS. It is commonly used in cell biological studies as an inhibitor of the NA(+)-K(+)-EXCHANGING ATPASE. | 11alpha-hydroxy steroid; 14beta-hydroxy steroid; 5beta-hydroxy steroid; alpha-L-rhamnoside; cardenolide glycoside; steroid hormone | anti-arrhythmia drug; cardiotonic drug; EC 2.3.3.1 [citrate (Si)-synthase] inhibitor; EC 3.1.3.41 (4-nitrophenylphosphatase) inhibitor; EC 3.6.3.10 (H(+)/K(+)-exchanging ATPase) inhibitor; EC 3.6.3.9 (Na(+)/K(+)-transporting ATPase) inhibitor; ion transport inhibitor; plant metabolite |
| digitoxin | digitoxin : A cardenolide glycoside in which the 3beta-hydroxy group of digitoxigenin carries a 2,6-dideoxy-beta-D-ribo-hexopyranosyl-(1->4)-2,6-dideoxy-beta-D-ribo-hexopyranosyl-(1->4)-2,6-dideoxy-beta-D-ribo-hexopyranosyl trisaccharide chain. Digitoxin: A cardiac glycoside sometimes used in place of DIGOXIN. It has a longer half-life than digoxin; toxic effects, which are similar to those of digoxin, are longer lasting. (From Martindale, The Extra Pharmacopoeia, 30th ed, p665) | cardenolide glycoside | EC 3.6.3.9 (Na(+)/K(+)-transporting ATPase) inhibitor |
| t0901317 | T0901317: an LXRalpha and LXRbeta agonist | ||
| (2'-(benzyloxycarbonylaminomethyl)biphenyl-2-carboxylic acid 2-(2-pyridyl)ethylamide) | biphenyls | ||
| digoxin | digoxin : A cardenolide glycoside that is digitoxin beta-hydroxylated at C-12. A cardiac glycoside extracted from the foxglove plant, Digitalis lanata, it is used to control ventricular rate in atrial fibrillation and in the management of congestive heart failure with atrial fibrillation, but the margin between toxic and therapeutic doses is small. Digoxin: A cardiotonic glycoside obtained mainly from Digitalis lanata; it consists of three sugars and the aglycone DIGOXIGENIN. Digoxin has positive inotropic and negative chronotropic activity. It is used to control ventricular rate in ATRIAL FIBRILLATION and in the management of congestive heart failure with atrial fibrillation. Its use in congestive heart failure and sinus rhythm is less certain. The margin between toxic and therapeutic doses is small. (From Martindale, The Extra Pharmacopoeia, 30th ed, p666) | cardenolide glycoside; steroid saponin | anti-arrhythmia drug; cardiotonic drug; EC 3.6.3.9 (Na(+)/K(+)-transporting ATPase) inhibitor; epitope |
| digitoxigenin | digitoxigenin : A 5beta-cardenolide that is 5beta-cardanolide with hydroxy substituents at the 3beta- and 14beta-positions and double bond unsaturation at C(20)-C(22). Digitoxigenin: 3 beta,14-Dihydroxy-5 beta-card-20(22)enolide. A cardenolide which is the aglycon of digitoxin. Synonyms: Cerberigenin; Echujetin; Evonogenin; Thevetigenin. | 14beta-hydroxy steroid; 3beta-hydroxy steroid | |
| anandamide | anandamide : An N-acylethanolamine 20:4 resulting from the formal condensation of carboxy group of arachidonic acid with the amino group of ethanolamine. | endocannabinoid; N-acylethanolamine 20:4 | human blood serum metabolite; neurotransmitter; vasodilator agent |
| n-(n-(3,5-difluorophenacetyl)alanyl)phenylglycine tert-butyl ester | DAPT : A dipeptide consisting of alanylphenylglycine derivatised as a 3,5-difluorophenylacetamide at the amino terminal and a tert-butyl ester at the carboxy terminal. A gamma-secretase inhibitor. | carboxylic ester; difluorobenzene; dipeptide; tert-butyl ester | EC 3.4.23.46 (memapsin 2) inhibitor |
| sulindac sulfide | sulindac sulfide : An aryl sulfide that is a metabolite of sulindac. A non-steroidal anti-inflammatory drug, which also has anticancer activity. sulindac sulfide: sulfated analog of indomethacin & inhibitor of prostaglandin synthesis in vitro; RN given refers to cpd without isomeric designation; structure given in first source | aryl sulfide; monocarboxylic acid; organofluorine compound | antineoplastic agent; apoptosis inducer; non-steroidal anti-inflammatory drug |
| l 685458 | L 685458: a gamma-secretase inhibitor; structure in first source L-685,458 : A peptide and carboxamide that is L-leucyl-L-phenylalaninamide, L-Leu-L-Phe-NH2, which has been acylated on the N-terminus by a Phe-Phe hydroxyethylene dipeptide isotere, 2R-benzyl-5S-tert-butoxycarbonylamino-4R-hydroxy-6-phenylhexanoic acid. Compounds based on the structure of L-685,458 are potent inhibitors of gamma-secretase, which mediates the final catalytic step that generates the amyloid beta-peptide (Abeta), which assembles into the neurotoxic aggregates in the brains of sufferers of Alzheimer's disease. | carbamate ester; monocarboxylic acid amide; peptide; secondary alcohol | EC 3.4.23.46 (memapsin 2) inhibitor; peptidomimetic |
| am-356 | methanandamide: structure given in first source; RN given refers to (all-Z)-(+-)-isomer | fatty amide | |
| mk 0752 | |||
| ave 0118 | |||
| a 1899 | A 1899: a TASK-1 potassium channel blocker; structure in first source | ||
| ly 450139 | peptide | ||
| chf 5074 | 1-(3',4'-dichloro-2-fluoro(1,1'-biphenyl)-4-yl)cyclopropanecarboxylic acid: a beta-amyloid(1-42) lowering agent; structure in first source | ||
| phakellistatin 2 | phakellistatin 2: isolated from the marine sponge Phakellia carteri; structure in first source | ||
| ly 411575 | dibenzoazepine; difluorobenzene; lactam; secondary alcohol | EC 3.4.23.46 (memapsin 2) inhibitor | |
| 4-(2-((1r)-1-(((4-chlorophenyl)sulfonyl)-2,5-difluoroanilino)ethyl)-5-fluorophenyl)butanoic acid | sulfonamide | ||
| begacestat | |||
| e 2012 | |||
| mrk 560 | MRK 560: a gamma-secretase inhibitor; MRK-560 is the (cis)-isomer; structure in first source | ||
| digitoxigenin monodigitoxoside | digitoxigenin monodigitoxoside: RN given refers to (ribo-3beta,5beta)-isomer | ||
| evomonoside | evomonoside : A cardenolide glycoside consisting of digitoxigenin having an alpha-L-rhamnosyl moiety attached at the O(3)-position. evomonoside: a cytotoxic cardiac glycoside from Lepidium apetalum; RN refers to (3beta,5beta)-isomer | cardenolide glycoside | |
| halisulfate 1 | halisulfate 1: an isocitrate lyase inhibitor sesterterpene sulfate from sponge, Hippospongia sp.; structure in first source | organic molecular entity | metabolite |
| 1, 3-di-(n-carboxybenzoyl-leucyl-leucyl)amino acetone | 1, 3-di-(N-carboxybenzoyl-leucyl-leucyl)amino acetone: structure in first source | ||
| pf 3084014 | nirogacestat : A member of the class of imidazoles that is 1H-imidazole substituted by a 1-[(2,2-dimethylpropyl)amino]-2-methylpropan-2-yl group at position 1 and a {N-[(2S)-6,8-difluoro-1,2,3,4-tetrahydronaphthalen-2-yl]-L-norvalyl}amino group at position 4. It is a gamma-secretase inhibitor whose hydrobromide salt is indicated for adult patients with progressing desmoid tumours who require systemic treatment. nirogacestat: an antineoplastic agent | ||
| bms 708163 | BMS 708163: structure in first source | oxadiazole; ring assembly | |
| ro 4929097 | dibenzoazepine; dicarboxylic acid diamide; lactam; organofluorine compound | EC 3.4.23.46 (memapsin 2) inhibitor | |
| jnj 40418677 | |||
| (r)-4-cyclopropyl-7,8-difluoro-5-(4-(trifluoromethyl)phenylsulfonyl)-4,5-dihydro-1h-pyrazolo(4,3-c)quinoline | (R)-4-cyclopropyl-7,8-difluoro-5-(4-(trifluoromethyl)phenylsulfonyl)-4,5-dihydro-1H-pyrazolo(4,3-c)quinoline: gamma secretase inhibitor; structure in first source |