Video Experimental Relacionado

Updated: May 2, 2026

Multi-analyte Biochip MAB Based on All-solid-state Ion-selective Electrodes ASSISE for Physiological Research

Multi-analyte Biochip MAB Based on All-solid-state Ion-selective Electrodes ASSISE for Physiological Research

Published on: April 18, 2013

Identificación molecular de un intercambiador aniónico renal de urato que regula los niveles de urato en sangre

Atsushi Enomoto¹, Hiroaki Kimura, Arthit Chairoungdua

¹Department of Pharmacology and Toxicology, Kyorin University School of Medicine, Tokyo 181-8611, Japan.

|May 25, 2002

Resumen

Los científicos identificaron el transportador de urato 1 (URAT1) en el riñón humano, que regula los niveles de ácido úrico en la sangre. Los defectos en este transportador están relacionados con el bajo nivel de ácido úrico en los pacientes, lo que ofrece información sobre la homeostasis del urato.

Área de la Ciencia:

Nefrología Nefrología.
Fisiología Humana Fisiología Humana.
La bioquímica es la bioquímica.

Sus antecedentes:

El urato, un producto del metabolismo de las purinas, actúa como un antioxidante y neuroprotector.
Los seres humanos mantienen niveles más altos de urato en sangre que otros mamíferos debido a la eficiente reabsorción renal, a pesar de la falta de uricasa hepática.
Los mecanismos moleculares del transporte renal de urato en humanos no se comprenden completamente.

Objetivo del estudio:

Para identificar el transportador de urato en el riñón humano responsable de regular los niveles de urato en la sangre.
Investigar el papel de este transportador en la homeostasis humana del urato y las condiciones asociadas.

Principales métodos:

Identificación molecular del transportador de urato SLC22A12 (URAT1) en el riñón humano.
Análisis de SLC22A12 en pacientes con hipouricaemia renal idiopática.

Principales resultados:

URAT1 fue identificado como un intercambiador de aniones de urato en el riñón humano, crucial para la regulación de urato en sangre.
URAT1 es el objetivo de los fármacos que afectan la excreción de ácido úrico.
Se encontraron mutaciones en SLC22A12 en pacientes con hipouricaemia renal idiopática.

Conclusiones:

URAT1 (SLC22A12) es el transportador primario de urato en el riñón humano.
Los defectos en URAT1 causan hipouricaemia, destacando su papel en la homeostasis de los uratos.
La comprensión de la función de URAT1 puede conducir a nuevos tratamientos para la hiperuricemia y trastornos relacionados.

Más Videos Relacionados

Functional Characterization of Na+/H+ Exchangers of Intracellular Compartments Using Proton-killing Selection to Express Them at the Plasma Membrane

Functional Characterization of Na+/H+ Exchangers of Intracellular Compartments Using Proton-killing Selection to Express Them at the Plasma Membrane

Published on: March 30, 2015

A Micro-agar Salt Bridge Electrode for Analyzing the Proton Turnover Rate of Recombinant Membrane Proteins

A Micro-agar Salt Bridge Electrode for Analyzing the Proton Turnover Rate of Recombinant Membrane Proteins

Published on: January 7, 2019

Videos de Conceptos Relacionados

Potentiometry: Membrane Electrodes

Potentiometry: Membrane Electrodes

Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...

Ion Exchange

Ion Exchange

Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...

Ion-Exchange Chromatography

Ion-Exchange Chromatography

Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...

Roles of Electrolytes: Chloride and Bicarbonate

Roles of Electrolytes: Chloride and Bicarbonate

Chloride ions contribute to the osmotic pressure gradient distinguishing the intracellular fluid (ICF) from the extracellular fluid (ECF). They counterbalance positively charged ions in the ECF and ensure its electrochemical stability. The renal system's process of chloride absorption and release generally mirrors that of sodium ions.
Conditions such as hypochloremia can arise from insufficient chloride reabsorption by the kidneys, often compounded by extended bouts of diarrhea, vomiting,...

Acid-Base Balance

Acid-Base Balance

The human body maintains a narrow pH range regulated through acid-base balance. This balance is crucial as changes in the hydrogen ion concentration can disrupt cell membrane stability, alter protein structures, and change enzyme activities. The normal pH of arterial blood is 7.4, venous blood and interstitial fluid is 7.35, and intracellular fluid averages 7.0.
When the pH of arterial blood rises above 7.45, it results in a condition called alkalosis. Conversely, a drop below 7.35 leads to...

Renal Regulation of Acid-Base Balance

Renal Regulation of Acid-Base Balance

Metabolic reactions in the body produce nonvolatile acids, such as sulfuric acid, which generate an acid load of approximately 1 mEq of H+ per kilogram of body weight daily. Excreting H+ in the urine is essential to balance this acid load.
In the kidneys, cells within the proximal convoluted tubules (PCT) and the collecting ducts secrete hydrogen ions (H+) into the tubular fluid. Specifically, in the PCT, Na+/H+ antiporters secrete H+ while reabsorbing Na+.
However, the intercalated cells in...