Biomaterial Database

Amiloride-sensitive Na channels. 1998

J D Horisberger

Institute of Pharmacology and Toxicology, Lausanne, Switzerland. Jean-Daniel.Horisberger@ipharm.unil.ch

The emerging epithelial Na channel/degenerin family of sodium channels is rapidly expanding, in particular with new members expressed in mammalian neurons and potentially involved in pain transmission. Experimental evidence supports a four-subunit stoichiometry for these channels (although this is still controversial), and basic functional elements (pore and selectivity filter, amiloride binding site, gating) have started to be attributed to specific domains of the protein. Although much remains to be done, in the past year progress has been made in the understanding of several regulatory mechanisms: the control of epithelial Na channel translation by mineralocorticoid hormones, the role of endocytosis and ubiquitination for degradation in the control of the channel density and the role of extracellular proteases.

UI	MeSH Term	Description	Entries
D007473	Ion Channels	Gated, ion-selective glycoproteins that traverse membranes. The stimulus for ION CHANNEL GATING can be due to a variety of stimuli such as LIGANDS, a TRANSMEMBRANE POTENTIAL DIFFERENCE, mechanical deformation or through INTRACELLULAR SIGNALING PEPTIDES AND PROTEINS.	Membrane Channels,Ion Channel,Ionic Channel,Ionic Channels,Membrane Channel,Channel, Ion,Channel, Ionic,Channel, Membrane,Channels, Ion,Channels, Ionic,Channels, Membrane
D009419	Nerve Tissue Proteins		Proteins, Nerve Tissue,Tissue Proteins, Nerve
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000584	Amiloride	A pyrazine compound inhibiting SODIUM reabsorption through SODIUM CHANNELS in renal EPITHELIAL CELLS. This inhibition creates a negative potential in the luminal membranes of principal cells, located in the distal convoluted tubule and collecting duct. Negative potential reduces secretion of potassium and hydrogen ions. Amiloride is used in conjunction with DIURETICS to spare POTASSIUM loss. (From Gilman et al., Goodman and Gilman's The Pharmacological Basis of Therapeutics, 9th ed, p705)	Amidal,Amiduret Trom,Amiloberag,Amiloride Hydrochloride,Amiloride Hydrochloride, Anhydrous,Kaluril,Midamor,Midoride,Modamide,Anhydrous Amiloride Hydrochloride,Hydrochloride, Amiloride,Hydrochloride, Anhydrous Amiloride,Trom, Amiduret
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D015222	Sodium Channels	Ion channels that specifically allow the passage of SODIUM ions. A variety of specific sodium channel subtypes are involved in serving specialized functions such as neuronal signaling, CARDIAC MUSCLE contraction, and KIDNEY function.	Ion Channels, Sodium,Ion Channel, Sodium,Sodium Channel,Sodium Ion Channels,Channel, Sodium,Channel, Sodium Ion,Channels, Sodium,Channels, Sodium Ion,Sodium Ion Channel
D053503	Epithelial Sodium Channels	Sodium channels found on salt-reabsorbing EPITHELIAL CELLS that line the distal NEPHRON; the distal COLON; SALIVARY DUCTS; SWEAT GLANDS; and the LUNG. They are AMILORIDE-sensitive and play a critical role in the control of sodium balance, BLOOD VOLUME, and BLOOD PRESSURE.	Epithelial Sodium Channel,Epithelial Sodium Ion Channels,ENaC (Epithelial Na+ Channel),ENaC alpha,ENaC beta,ENaC delta,ENaC gamma,Epithelial Amiloride-Sensitive Sodium Channel,Epithelial Sodium Channel, alpha Subunit,Epithelial Sodium Channel, beta Subunit,Epithelial Sodium Channel, delta Subunit,Epithelial Sodium Channel, gamma Subunit,SCNN1 alpha Subunit,SCNN1 beta Subunit,SCNN1 delta Subunit,SCNN1 gamma Subunit,Sodium Channel, Nonvoltage-gated 1 Protein, alpha Subunit,Sodium Channel, Nonvoltage-gated 1 Protein, beta Subunit,Sodium Channel, Nonvoltage-gated 1 Protein, delta Subunit,Sodium Channel, Nonvoltage-gated 1 Protein, gamma Subunit,Epithelial Amiloride Sensitive Sodium Channel,Sodium Channel, Epithelial,Sodium Channels, Epithelial,alpha Subunit, SCNN1
D062565	Acid Sensing Ion Channels	A family of proton-gated sodium channels that are primarily expressed in neuronal tissue. They are AMILORIDE-sensitive and are implicated in the signaling of a variety of neurological stimuli, most notably that of pain in response to acidic conditions.	Acid Sensing Ion Channel,Acid-Sensing Ion Channel,Proton-Gated Sodium Channel,Proton-Gated Sodium Channels,ASIC Channel,Acid-Sensing Ion Channels,Channel, Acid-Sensing Ion,Channel, Proton-Gated Sodium,Ion Channel, Acid-Sensing,Proton Gated Sodium Channel,Proton Gated Sodium Channels,Sodium Channel, Proton-Gated,Sodium Channels, Proton-Gated
D062626	Degenerin Sodium Channels	A family of mechanosensitive sodium channels found primarily in NEMATODES where they play a role in CELLULAR MECHANOTRANSDUCTION. Degenerin sodium channels are structurally-related to EPITHELIAL SODIUM CHANNELS and are named after the fact that loss of their activity results in cellular degeneration.	Degenerin,Degenerin Ion Channels,Degenerin Sodium Ion Channels,Degenerins,Ion Channels, Degenerin,Sodium Channels, Degenerin