Video Experimental Relacionado

Updated: Jan 22, 2026

Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents

Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents

Published on: May 28, 2014

Mecanismo y base estructural para la inhibición del tráfico de cobre mediante medicamentos anticancerígenos de

Alessia Lasorsa¹, Maria I Nardella¹, Antonio Rosato¹

¹Department of Chemistry , University of Bari "Aldo Moro" , via Orabona, 4 , 70125 Bari , Italy.

Journal of the American Chemical Society

|July 9, 2019

Resumen

Los medicamentos de platino como el cisplatino interfieren con el transporte de cobre al unirse al complejo Atox1-Cu (I) -Mnk1. Esta interacción interrumpe la homeostasis del cobre, afectando la viabilidad y la migración de las células cancerosas.

Área de la Ciencia:

La bioquímica
Química de las metaloproteínas
Terapia contra el cáncer

Sus antecedentes:

El cobre (Cu) es esencial para la maduración de la cuproenzima, la proliferación celular y la angiogénesis, lo que requiere interacciones proteicas específicas para el transporte.
El chaperón de cobre Atox1 entrega Cu ((I) a las ATPasas Atp7a / Atp7b, cruciales para la regulación y secreción de cobre.
La transferencia de cobre implica intermedios transitorios de tres coordenadas entre Atox1 y Cu-ATPases, utilizando motivos de Ditiol CxxC.

Objetivo del estudio:

Investigar la interacción entre los fármacos antitumorales de platino y el complejo Atox1-Cu(I) -ATPasa.
Elucidar las bases estructurales y las consecuencias funcionales de la unión del fármaco de platino a las proteínas transportadoras de cobre.

Principales métodos:

Caracterización estructural del adducto Atox1-Cu ((I) -Mnk1-Pt ((II) utilizando la RMN en solución y la cristalografía de rayos X.
Se utilizaron proteínas mutadas para evaluar la estabilidad y la reactividad de diferentes configuraciones de unión.
Se investigó el efecto del ion metálico (Cu ((I) vs. Zn ((II)) y el isómero de la droga de platino (cisplatino vs. transplatino) en la formación de complejos.

Principales resultados:

El cisplatino y un análogo del oxaliplatino forman un adducto cinéticamente estable con el complejo Atox1-Cu(I) -Mnk1.
El análisis estructural reveló configuraciones de unión específicas, siendo una menos estable y más reactiva hacia Pt{II}.
Los iones de cobre pueden retenerse en el sitio de coordinación del platino pero liberarse a los tiolos fisiológicos como el glutatión.

Conclusiones:

Los medicamentos de platino (II) se dirigen específicamente y estabilizan el complejo Atox1-Cu (I) -ATPasa, interrumpiendo la homeostasis del cobre.
La interferencia con el intercambio iónico de cobre afecta la viabilidad y la migración de las células cancerosas.
Los hallazgos destacan un nuevo mecanismo de acción para la quimioterapia a base de platino dirigido al tráfico de iones metálicos.

Más Videos Relacionados

Assessing Specificity of Anticancer Drugs In Vitro

Assessing Specificity of Anticancer Drugs In Vitro

Published on: March 23, 2016

Tracking Drug-induced Changes in Receptor Post-internalization Trafficking by Colocalizational Analysis

Tracking Drug-induced Changes in Receptor Post-internalization Trafficking by Colocalizational Analysis

Published on: July 3, 2015

Videos de Conceptos Relacionados

Feedback Inhibition

Feedback Inhibition

Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!

Structure-Activity Relationships and Drug Design

Structure-Activity Relationships and Drug Design

Drug design is a dynamic field that involves discovering and developing new medications based on specific biological targets. This process heavily relies on structure-activity relationships (SAR) and quantitative structure-activity relationships (QSAR) to guide the design and optimization of efficient drugs.
SAR studies the intricate relationship between a drug's chemical structure and biological activity. It focuses on understanding how modifications to a drug's structure can influence...

Structures of Solids

Structures of Solids

Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...

Mechanistic Models: Overview of Compartment Models

Mechanistic Models: Overview of Compartment Models

Mechanistic models, a category encompassing both physiological and compartmental modeling, differ from empirical models' approaches to incorporating known factors about the systems being modeled. Empirical models describe data with minimal assumptions, while mechanistic models aim to provide a robust description of available data by specifying assumptions and integrating known factors about the system. Compartmental analysis is a key example of a mechanistic model in pharmacokinetics and...

Enzyme Inhibition

Enzyme Inhibition

Inhibitors are molecules that reduce enzyme activity by binding to the enzyme. In a normally functioning cell, enzymes are regulated by a variety of inhibitors. Drugs and other toxins can also inhibit enzymes. Some inhibitors bind to the enzyme’s active site, while others inhibit enzymatic activity by binding to other sites on the protein structure.

RNA Structure

RNA Structure

Overview
The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA): messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three RNA types consist of a...