Video Experimental Relacionado
Updated: Sep 18, 2025
09:11
Synthesis of Near-Infrared Emitting Gold Nanoclusters for Biological Applications
Published on: March 22, 2020
7.9K
Muerte celular inmunogénica de larga duración inducida por un redóxico activo soluble en agua Au ((I)
Matthew S Levine1, Sajal Sen1, Esther Y Maier2
1Department of Chemistry, The University of Texas at Austin, 105 East 24th Street Stop A 5300, Austin, Texas 78712-1224, United States.
Journal of the American Chemical Society
|June 26, 2025
Resumen
Los investigadores desarrollaron nuevos compuestos de oro que inducen la muerte de las células cancerosas y entrenan el sistema inmunológico. Estos compuestos desencadenan efectivamente la muerte celular inmunogénica (ICD) y son prometedores para la inmunoterapia del cáncer, incluso previniendo el crecimiento tumoral en ratones.
Área de la Ciencia:
- Química medicinal
- Inmunoterapia contra el cáncer
- Nanotecnología
Sus antecedentes:
- La muerte celular inmunogénica (ICD) es crucial para la inmunoterapia contra el cáncer, pero el desarrollo de inductores efectivos es un desafío.
- Investigaciones previas identificaron un carbeno oro- bis-N-heterocíclico (Au-bis-NHC) que inducía la CDI pero carecía de solubilidad en agua.
Objetivo del estudio:
- Para sintetizar y evaluar nuevos Au ((I) bis-NHC solubles en agua para una inducción mejorada de ICD.
- Establecer relaciones estructura-actividad entre las propiedades redox, la solubilidad y la eficacia del ICD.
Principales métodos:
- Síntesis de una serie de Au ((I) bis-NHCs hidrosolubles y redox-activos (compuestos 2-4).
- Evaluación de los biomarcadores del DIC (calreticulina, ATP, HMGB1) y generación de especies reactivas del oxígeno (ROS).
- Estudios in vivo con el modelo de cáncer colorrectal CT26 en ratones.
Principales resultados:
- El compuesto 2, una naftaquinona que contiene Au ((I) bis-NHC, demostró una solubilidad equilibrada en agua y una potente inducción de CDI.
- El compuesto 2 desencadenó la producción de ROS y los biomarcadores clave de ICD, a diferencia de un control que carecía de la fracción redox.
- In vivo, el compuesto 2 inhibió el crecimiento tumoral y estableció una respuesta de memoria inmune a largo plazo.
Conclusiones:
- Los Au ((I) bis-NHC redox-activos solubles en agua representan una estrategia prometedora para la inmunoterapia del cáncer.
- La generación de ROS se correlaciona con la expresión del biomarcador ICD y la eficacia terapéutica.
- El compuesto 2 muestra un potencial significativo para prevenir la progresión del cáncer y establecer una inmunidad antitumoral duradera.
Videos de Conceptos Relacionados
01:18Autophagic Cell Death
3.6K
Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and...
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and...
3.6K
01:16Necrosis
4.9K
Necrosis is considered as an “accidental” or unexpected form of cell death that ends in cell lysis. The first noticeable mention of “necrosis” was in 1859 when Rudolf Virchow used this term to describe advanced tissue breakdown in his compilation titled “Cell Pathology”.
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become...
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become...
4.9K
01:30Overview of Cell Death
7.8K
Cell death is an essential process where the body gets rid of old or damaged cells. Cell proliferation and death need to be balanced, as an imbalance between the two may lead to cancer or autoimmune diseases.
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the...
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the...
7.8K
01:23Cells of the Adaptive Immune Response
4.7K
The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
4.7K
01:17The Extrinsic Apoptotic Pathway
6.6K
The extrinsic apoptotic pathway is initiated when extracellular death-inducing signals, such as specific cytokines, activate the death receptors expressed on the cell surface. The immune cells involved in this pathway are natural killer cells (NK cells) and cytotoxic T-lymphocytes. NK cells are critical in innate immune response, while cytotoxic T-lymphocytes are associated with adaptive immune response. These cells recognize specific receptors expressed on the altered cells and activate...
6.6K