Video Experimental Relacionado
Updated: Jun 16, 2026
09:37
A Phenotyping Regimen for Genetically Modified Mice Used to Study Genes Implicated in Human Diseases of Aging
Published on: July 14, 2016
8.4K
Asociación entre la disbiosis de la microbiota intestinal y la progresión de la degeneración macular relacionada con
1Department of Gastrointestinal Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, 430060, China.
Experimental eye research
|August 25, 2025
Resumen
La disbiosis intestinal, un desequilibrio en los microbios intestinales, está relacionada con la degeneración macular relacionada con la edad (AMD). Este estudio identifica genes y biomarcadores intestinales clave, revelando la participación de la vía inflamatoria y metabólica en la progresión de la DMAE.
Área de la Ciencia:
- Microbiología
- Oftalmología
- La genética
Sus antecedentes:
- La disbiosis de la microbiota intestinal está implicada en la patogénesis de la degeneración macular relacionada con la edad.
- Los mecanismos moleculares precisos que vinculan los microbios intestinales con la DMAE siguen siendo en gran medida desconocidos.
Objetivo del estudio:
- Identificar sistemáticamente los genes relacionados con la microbiota intestinal asociados con la DMAE.
- Para aclarar las vías moleculares involucradas en la patogénesis de la DMAE influenciada por la disbiosis intestinal.
- Desarrollar un modelo predictivo del riesgo de DMAE basado en biomarcadores identificados.
Principales métodos:
- Utilizamos la base de datos de gutMGene para identificar los genes relevantes.
- Se analizó la expresión génica diferencial en el conjunto de datos GSE29801.
- Se emplean algoritmos de aprendizaje automático (LASSO, Random Forest, XGBoost) para la identificación de biomarcadores.
- Realizó análisis de enriquecimiento (análisis de variación del conjunto de genes, análisis de enriquecimiento de un solo conjunto de genes) y desarrolló un nomograma predictivo.
Principales resultados:
- Se identificaron cinco genes biomarcadores consistentes: CXCL10, FADS3, GHRL, APOE y VEGFA.
- Se desarrolló un nomograma con precisión predictiva (AUC 0,719 para el GSE29801, 0,933 para el GSE99248).
- Se revelaron funciones significativas de los genes de la microbiota intestinal en las vías inflamatorias, inmunológicas y metabólicas (incluido el metabolismo de los lípidos) en la DMAE.
Conclusiones:
- La disbiosis de la microbiota intestinal influye en la progresión de la DMAE a través de alteraciones inflamatorias y metabólicas sistémicas.
- Los biomarcadores y vías identificados ofrecen objetivos terapéuticos potenciales para la DMAE.
- Este estudio proporciona nuevos conocimientos sobre el eje intestino-ojo en la patogénesis de la DMAE.
Palabras clave:
Degeneración macular relacionada con la edadLa bioinformáticaValor añadidoDisbiosis de la microbiota intestinalAprendizaje automáticoNomogramaMás Videos Relacionados
Videos de Conceptos Relacionados
01:30Development of Human Microbiota
The human microbiota begins developing at birth and undergoes continual change as we age. Infancy marks a critical period of microbial sensitivity, offering a “window of opportunity” during which beneficial microbes help mature the immune system. By age three, children typically develop a more stable and diverse microbial community. Newborns acquire microbes from their immediate environment; vaginal delivery favors maternal vaginal microbes, while cesarean births favor microbes from the skin...
01:22Microbiome of the Eye
The human eye has a specialized microbiota that reflects its unique anatomical and immunological environment. This low-biomass microbial community predominantly colonizes the conjunctiva and eyelid margins, playing a vital role in ocular surface homeostasis and defense. Despite its proximity to the richly colonized facial skin, the ocular surface maintains a distinct microbial profile due to continuous mechanical and biochemical defense mechanisms.The conjunctival surface hosts fewer microbial...
01:18Dysbiosis of the Gut Microbiota
The human gut microbiome includes a diverse array of microbial species, including beneficial commensals and opportunistic pathogens, which interact to support host health. These microbes contribute to essential functions such as nutrient metabolism, immune system modulation, and maintenance of intestinal barrier integrity. However, disruptions to this equilibrium—referred to as dysbiosis—can have widespread physiological consequences.Dysbiosis is often characterized by reduced microbial...
01:22Gut-Brain Axis
The gut–brain axis is a bidirectional communication system that connects the gastrointestinal tract and the brain. This interaction is mediated through multiple pathways, including the vagus nerve, hormonal signals, immune responses, and chemical messengers produced by gut microbes.Microbial Contributions to Brain FunctionGut microbiota contributes significantly to brain function by producing neuroactive compounds. These include neuroactive compounds that influence neurotransmitters such as...
01:23Alzheimer Disease ll: Pathophysiology
Alzheimer disease involves structural changes in the brain that begin long before symptoms appear. The most distinctive features are extracellular neuritic plaques and intracellular neurofibrillary tangles.Neuritic plaques form in the cerebral cortex and around blood vessels. These plaques contain a dense core of beta-amyloid (Aβ)—a toxic protein fragment that clumps outside neurons. The core is surrounded by damaged neuronal extensions, as well as reactive astrocytes and microglia. Abnormal...
01:27Degenerative Disc Disease I: Introduction
Degenerative disc disease is a chronic condition in which intervertebral discs gradually lose structure and function. It is not infectious or autoimmune; rather, it results from age-related biochemical and mechanical changes, influenced by genetic, metabolic, and environmental factors.Structure and Function of DiscsThe spine contains 23 intervertebral discs that absorb load, distribute forces, maintain spacing, and allow flexibility. Each disc consists of a nucleus pulposus, a gel-like core...