Video Experimental Relacionado

Updated: Jan 29, 2026

Bioprinting of Hydrogel Tumor Slices as a 3D Model for Mantle Cell Lymphoma

Bioprinting of Hydrogel Tumor Slices as a 3D Model for Mantle Cell Lymphoma

Published on: September 12, 2025

La acumulación de escualeno en los linfomas auxotróficos de colesterol previene la muerte celular oxidativa

Javier Garcia-Bermudez¹, Lou Baudrier¹, Erol Can Bayraktar¹

¹Laboratory of Metabolic Regulation and Genetics, The Rockefeller University, New York, NY, USA.

|February 15, 2019

Resumen

Ciertos cánceres, como el linfoma anaplásico de células grandes ALK positivo (ALCL), no pueden producir colesterol y deben importarlo. Esta dependencia del colesterol, o auxotropía, es un objetivo terapéutico potencial para estos cánceres específicos.

Área de la Ciencia:

La bioquímica
Biología celular
En el campo de la oncología

Sus antecedentes:

El colesterol es vital para el crecimiento y la proliferación celular.
Las células de los mamíferos obtienen colesterol a través de la absorción o la síntesis de novo.
No se comprende completamente la dependencia de las células cancerosas de estas vías de colesterol.

Objetivo del estudio:

Para identificar los tipos de células cancerosas que son auxotróficas para el colesterol.
Para determinar la base molecular de la auxotropía del colesterol.
Explorar estrategias terapéuticas dirigidas al metabolismo del colesterol en el cáncer.

Principales métodos:

Prueba de proliferación competitiva con líneas celulares codificadas por ADN.
Análisis de la expresión génica metabólica.
La detección genética basada en CRISPR.
Análisis de líneas celulares y tumores de linfoma anaplásico de células grandes (ALCL) positivos para ALK.

Principales resultados:

Se identificó un subconjunto de células cancerosas auxotróficas para el colesterol, dependientes de la absorción.
La pérdida de squalene monooxygenase causa la auxotropía del colesterol, especialmente en el ALK+ ALCL.
La acumulación de escualeno en ALK+ ALCL altera los perfiles lipídicos y protege contra la ferroptosis.
La absorción de colesterol mediada por el receptor de lipoproteínas de baja densidad es esencial para el crecimiento de la ALCL.

Conclusiones:

La auxotropía del colesterol en ALK+ ALCL es una vulnerabilidad objetivo.
La acumulación de escualeno confiere una ventaja de crecimiento a las células ALCL.
Los enfoques sistemáticos pueden descubrir dependencias únicas de nutrientes en tipos específicos de cáncer.

Más Videos Relacionados

High-throughput Nitrobenzoxadiazole-labeled Cholesterol Efflux Assay

High-throughput Nitrobenzoxadiazole-labeled Cholesterol Efflux Assay

Published on: January 7, 2019

Tumor Engraftment in a Xenograft Mouse Model of Human Mantle Cell Lymphoma

Tumor Engraftment in a Xenograft Mouse Model of Human Mantle Cell Lymphoma

Published on: March 30, 2018

Videos de Conceptos Relacionados

Autophagic Cell Death

Autophagic Cell Death

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...

Overview of Cell Death

Overview of Cell Death

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...

Cholesterol: Significance and Regulation

Cholesterol: Significance and Regulation

Although not a source of energy, cholesterol plays a significant role as a foundational structure for bile salts, steroid hormones, and vitamin D, as well as being a crucial component of plasma membranes. Approximately 15% of blood cholesterol is derived from our diet, with the remainder synthesized from acetyl CoA by the liver and intestines. Cholesterol is eliminated from the body through its conversion into bile salts, which are eventually discarded in the feces.
Considering cholesterol and...

Oxidation Numbers

Oxidation Numbers

In redox reactions, the transfer of electrons occurs between reacting species. Electron transfer is described by a hypothetical number called the oxidation number (or oxidation state). It represents the effective charge of an atom or element, which is assigned using a set of rules.

Pyruvate Oxidation

Pyruvate Oxidation

After glycolysis, the charged pyruvate molecules enter the mitochondria via active transport and undergo three enzymatic reactions. These reactions ensure that pyruvate can enter the next metabolic pathway so that energy stored in the pyruvate molecules can be harnessed by the cells.
First, the enzyme pyruvate dehydrogenase removes the carboxyl group from pyruvate and releases it as carbon dioxide. The stripped molecule is then oxidized and releases electrons, which are then picked up by NAD+...

Cancer Prevention

Cancer Prevention

Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
Some...