Video Experimental Relacionado
Updated: Feb 28, 2026

08:35
Identification of Alternative Splicing and Polyadenylation in RNA-seq Data
Published on: June 24, 2021
6.5K
CLADES - Aprendizaje Contrastivo Aumentado para el Empalme Diferencial con Pares Positivos Ortólogos
bioRxiv : the preprint server for biology
|February 27, 2026
Resumen
Desarrollamos un novedoso método de aprendizaje contrastivo que utiliza la conservación evolutiva para predecir cambios en el empalme alternativo. Este enfoque mapea eficazmente la secuencia a los resultados del empalme, mejorando la precisión en diversos contextos biológicos.
Área de la Ciencia:
- Genómica
- Biología Computacional
- Biología Molecular
Sus antecedentes:
- El empalme alternativo (AS) genera diversos transcritos y proteínas, pero la predicción del empalme específico del contexto sigue siendo un desafío debido a datos limitados y variabilidad experimental.
- La comprensión de los mecanismos reguladores basados en secuencias que rigen el AS es crucial para descifrar la complejidad celular.
Objetivo del estudio:
- Desarrollar un método robusto para aprender mapeos de secuencia a empalme utilizando la conservación evolutiva.
- Mejorar la predicción de eventos de empalme diferencial (Δψ) en varios contextos biológicos.
Principales métodos:
- Se propuso un marco de aprendizaje de representación contrastiva que aprovecha las secuencias ortólogas evolutivas como pares positivos.
- Se utilizó un objetivo discriminatorio para alinear las incrustaciones de equivalentes reguladores y enfatizar las señales conservadas.
- Se ajustó una cabeza supervisada para predecir Δψ y se desarrolló un marco de clasificación interpretable consciente de los empalmes de motivos.
Principales resultados:
- El preentrenamiento contrastivo mejoró significativamente la predicción de los cambios de inclusión de exones (Δψ).
- Se logró un sólido rendimiento en la clasificación de los cambios de empalme (AUPRC/AUROC) y resultados competitivos de regresión (RMSE, Spearman) en diversos puntos de referencia.
- Se demostró la interpretabilidad biológica de las representaciones aprendidas a través de la conciencia de los empalmes de motivos.
Conclusiones:
- El aprendizaje contrastivo guiado por la evolución proporciona un enfoque eficaz y biológicamente principista para la predicción de empalmes resuelta por contexto.
- El método desarrollado mejora la comprensión de la regulación basada en secuencias en el empalme alternativo.
- Este marco ofrece una herramienta poderosa para analizar el empalme diferencial en tejidos y tipos de células.
Videos de Conceptos Relacionados
Evolutionary Relationships through Genome Comparisons
7.1K
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
7.1K
Gene Duplication and Divergence
8.1K
The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
8.1K
Synteny and Evolution
3.9K
John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
3.9K
Associative Learning
1.6K
Associative learning is a fundamental concept in behavioral psychology, wherein a connection is established between two stimuli or events, leading to a learned response. This process is critical in understanding how behaviors are acquired and modified. Conditioning, the mechanism through which associations are formed, can be divided into two main types: classical conditioning and operant conditioning, each elucidating different aspects of associative learning.
Classical conditioning, also known...
Classical conditioning, also known...
1.6K
Alternative RNA Splicing
5.3K
5.3K
Alternative RNA Splicing
25.4K
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
25.4K

