Video Experimental Relacionado
Updated: Jul 15, 2026
08:19
Protocol for the Evaluation of MRI Artifacts Caused by Metal Implants to Assess the Suitability of Implants and the Vulnerability of Pulse Sequences
Published on: May 17, 2018
Las ventajas y desventajas de los iones metálicos en medicina
Katherine H Thompson1, Chris Orvig
1Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada.
Science (New York, N.Y.)
|May 10, 2003
Resumen
Los iones metálicos son cruciales en la biología, pero pueden ser tóxicos. El diseño de fármacos a base de metales requiere equilibrar los beneficios terapéuticos con los posibles riesgos de toxicidad para tratamientos seguros y efectivos.
Área de la Ciencia:
- La bioquímica es la bioquímica.
- Química Medicinal Química medicinal es el campo de la química medicinal.
- Toxicología Toxicología.
Sus antecedentes:
- Los iones metálicos juegan un papel vital en los sistemas biológicos, con elementos esenciales como el hierro y el zinc que han definido niveles óptimos de ingesta.
- Si bien son beneficiosos, muchos iones metálicos, esenciales o no, exhiben un estrecho umbral de toxicidad.
- Las moléculas que contienen metales son cada vez más valiosas en medicina, ofreciendo aplicaciones terapéuticas y de diagnóstico.
Objetivo del estudio:
- Destacar la doble naturaleza de los iones metálicos en los sistemas biológicos, que abarca tanto las funciones esenciales como la toxicidad potencial.
- Subrayar los desafíos en el desarrollo de fármacos a base de metales, centrándose en el equilibrio crítico entre eficacia y seguridad.
- Para enfatizar la importancia del diseño molecular cuidadoso en el aprovechamiento de los beneficios de los iones metálicos con fines medicinales.
Principales métodos:
- Revisión de la literatura sobre las funciones biológicas y la toxicidad de los iones metálicos.
- Análisis de los fármacos existentes basados en metales y estrategias terapéuticas.
- Discusión de los principios de diseño molecular para productos farmacéuticos a base de metales.
Principales resultados:
- Los iones metálicos exhiben un amplio espectro de efectos biológicos, desde la deficiencia hasta la toxicidad.
- Existen rangos óptimos de ingesta para los iones metálicos esenciales como el hierro y el zinc.
- La ventana terapéutica para los medicamentos a base de metales a menudo está limitada por preocupaciones de toxicidad.
Conclusiones:
- El desarrollo de medicamentos seguros y efectivos a base de metales requiere una comprensión profunda de la bioquímica y toxicología de los iones metálicos.
- El diseño molecular cuidadoso es primordial para mitigar la toxicidad y maximizar el potencial terapéutico de los iones metálicos.
- El uso juicioso de los iones metálicos en la medicina ofrece una promesa significativa, siempre que la seguridad y la eficacia estén cuidadosamente equilibradas.
Videos de Conceptos Relacionados
00:57The Periodic Table and Organismal Elements
Elements are the smallest units of matter that cannot be broken down further by chemical processes. There are 118 known elements, but not all of these are naturally-occurring, and fewer still are essential for life. Living matter is composed primarily of carbon, nitrogen, hydrogen, and oxygen, with smaller amounts of other elements like calcium, phosphorus, potassium, and sulfur. Other elements are also necessary for life but only in trace amounts.The Periodic Table Provides Information about...
02:51Metal-Ligand Bonds
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
01:27The Periodic Table and Organismal Elements
Elements are the smallest units of matter that cannot be broken down further by chemical processes. There are 118 known elements, but not all of these are naturally occurring, and only a few of them are essential for life. Living matter is composed primarily of carbon, nitrogen, hydrogen, and oxygen, with smaller amounts of other elements like calcium, phosphorus, potassium, and sulfur. Other elements are also necessary for life but only in trace amounts.
Periodic Table Provides Information...
Periodic Table Provides Information...
01:24Magnetic Resonance Imaging
Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
01:24Metal-Semiconductor Junctions
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The semiconductor's...
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The semiconductor's...
01:14Imaging Studies I: CT and MRI
Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...