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ASER: Animal Sex Reversal Database.

Yangyang Li1, Zonggui Chen2, Hairong Liu3

  • 1State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, China.

Genomics, Proteomics & Bioinformatics
|November 28, 2021
PubMed
Summary

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The ASER database is a new, centralized online resource that gathers information on animal sex reversal. By analyzing thousands of scientific publications, the researchers compiled data on genes, regulatory networks, and gene expression patterns across 18 different species. This tool helps scientists study how sex reversal occurs in animals and how these biological processes might relate to human reproductive health and disease.

Area of Science:

  • Genomics and bioinformatics research within ASER database development
  • Comparative endocrinology and reproductive biology

Background:

Biological sex determination remains a highly dynamic process across various animal lineages. While researchers have documented numerous instances of sexual plasticity, a centralized repository for this information has not existed. This gap hindered the ability of scientists to compare findings across diverse species. Prior work often remained scattered throughout isolated publications and disparate datasets. That uncertainty drove the need for a unified platform to aggregate existing knowledge. No prior work had resolved the challenge of integrating genomic data with spatial expression patterns for these specific traits. This project addresses the lack of a comprehensive resource hub for sex reversal information. The current landscape of reproductive biology research requires better tools for cross-species analysis.

Purpose Of The Study:

The primary aim of this project was to construct a comprehensive database for animal sex reversal information. The researchers sought to address the lack of an integrated resource hub for this field. They intended to consolidate data from a wide range of species, spanning from teleostei to mammalia. The team aimed to provide a platform for querying sex reversal-associated genes and their regulatory networks. They wanted to facilitate the reuse of organized data for exploring biological mechanisms. The investigators also aimed to link these findings to applications in animal breeding. Another goal was to provide insights relevant to human endocrine-related diseases and cancers. This effort was motivated by the need to synthesize scattered knowledge into a single, accessible repository.

Keywords:
ConservationDatabaseOmicsSex reversalSex reversal-associated genegenomic databasesexual plasticitygene expressionreproductive healthcomparative genomics

Frequently Asked Questions

The researchers propose that ASER functions as a centralized hub by integrating genomic data, regulatory networks, and spatial expression patterns from 18 species. This resource allows users to query sex reversal-associated genes to understand their roles in biological plasticity compared to previous fragmented literature.

The database includes manually annotated images from in situ hybridization, fluorescence in situ hybridization, and immunohistochemistry techniques. These visual data points provide specific information on the spatial expression of genes within gonadal tissues, which is not available through genomic sequencing alone.

The authors state that integrating data from 18 species, ranging from teleostei to mammalia, is necessary to establish a broad evolutionary context. This wide taxonomic range allows for the computation of conservation scores and the identification of homologous genes across diverse animal groups.

Related Experiment Videos

Main Methods:

The team performed a systematic review of over forty thousand published articles to identify relevant literature. They utilized computational pipelines to mine sex reversal-associated genes and their regulatory networks from these sources. The investigators annotated homologous genes and calculated conservation scores across the genomes of eighteen distinct species. They integrated available transcriptomic datasets to analyze gene expression dynamics during developmental transitions. The researchers manually curated hundreds of images derived from histological and molecular staining techniques. This curation process focused on visualizing the spatial distribution of gene products within gonadal tissues. The design emphasizes data accessibility through a publicly available web interface. This approach ensures that the compiled information remains reusable for future biological inquiries.

Main Results:

The database successfully aggregates information on sex reversal-associated genes across eighteen species ranging from teleostei to mammalia. The researchers mined these regulatory networks from a core set of 1611 scientific papers. They manually annotated 550 images obtained from in situ hybridization, fluorescence in situ hybridization, and immunohistochemistry experiments. The platform provides comprehensive conservation scores for whole genomes across all included species. The team identified and organized expression dynamics for genes involved in sex determination processes. The final resource contains data derived from a systematic collection of 40,018 published studies. This integration allows for the direct comparison of gene expression patterns in gonads. The database is now accessible to the public for querying and data reuse.

Conclusions:

The authors present ASER as a unique and integrated resource for the scientific community. This platform allows users to query and reuse organized data regarding sexual plasticity. Researchers can utilize these findings to explore the underlying mechanisms of sex reversal. The database facilitates investigations into the applications of sex reversal-associated genes. These insights may eventually inform practices in animal breeding programs. The team suggests that their work also holds relevance for understanding human health. By providing curated information, the authors aim to support future studies in reproductive biology. This synthesis provides a foundation for examining how these genes influence endocrine-related diseases.

RNA-seq datasets serve as the primary source for investigating expression dynamics. These data allow researchers to track how specific genes change their activity levels during the transition of sex determination or reversal processes, providing a temporal view of gene regulation.

The researchers measure the conservation of genes across genomes to identify evolutionary trends. They also quantify the spatial distribution of gene products in gonads using annotated imaging, which helps distinguish between different regulatory patterns in various species.

The authors imply that ASER will assist in exploring the applications of sex reversal-associated genes in animal breeding. They also suggest that the database provides a foundation for studying the impact of these genes on endocrine-related diseases in humans.