Genes profiles with Temporal-specific Expression Patterns

Genes profiles with temporal-specific expression patterns were defined as those whose expression has a specific pattern with respect to time.

Linear and Nonlinear Parametric Models

Using a high-throughput regression analysis approach, eight linear and nonlinear parametric models (linear, constant, logistic, logarithmic, exponential, power, trigonometric, quadratic functions) were fitted to gene expression profiles from time-series experiments to identify eight types of genes with temporal-specific expression patterns. They serve as biological representations of diverse gene expression patterns.

  • Linear Model: captures genes profiles with linear expression changes over time, aiding in the study of developmental processes or responses to stimuli.
  • Constant Model: identifies genes profiles with stable expression levels over time, serving as internal controls or reference genes.
  • Logistic Model: identifies genes profiles exhibiting gradual transitions or switch-like behavior, such as in cell differentiation or fate determination.
  • Logarithmic Model: detecting genes profiles with linear growth or decay patterns, related to aging, proliferation, and metabolic processes.
  • Exponential Model: identifies genes profiles with exponential growth or decay patterns, applicable to cellular growth and viral replication.
  • Power Model: captures genes profiles with power-law relationships, indicating involvement in complex regulatory networks or signaling pathways.
  • Trigonometric Model: identifies genes profiles with cyclic or periodic expression patterns, relevant in circadian rhythms and cell cycle progression.
  • Quadratic Model: detects genes profiles with concave or convex expression patterns, aiding in the study of biological processes with distinct phases or transitions.

  • Datasets

    We manually collected and curated raw data from 2684 time-series transcriptomic datasets in the Gene Expression Omnibus (GEO) and ArrayExpress repositories. These datasets were derived from well-conducted time course studies (that had at least five time points) involving humans and various other organisms.

    Methods

    For gene expression data, we clustered subsets of genes using Clust and performed regression analysis to identify patterns.

    HOME
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    Fuzzy query is enabled. In the main page, time course datasets can be quickly searched by a single gene symbol or a keyword of dataset.

    Search result page
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    Time course datasets that meet the specified criteria are listed separately, and clicking on the dataset ID leads to a detailed information page about the study. Furthermore, clicking on a specific gene provides detailed information about that gene.

    Study detailed information page
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    The detailed information page contains available experimental details, evaluation results of seven models, information about the optimal model, gene expression heat maps/trend maps, and functional annotation and pathway enrichment results for different model groups.

    Gene detailed information page
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    The detailed information page contains the available gene and experimental information, the details of the gene model, the heat map,trend map of gene expression and fitting.

    SEARCH
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    By utilizing these parametric models, researchers can uncover diverse gene expression patterns, providing insights into regulatory mechanisms and functional implications in different biological contexts.

    The first five conditions can be arbitrarily selected, and finally enter the gene you want to query, you can get the screening results.

    BROWSE
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    A list of time course datasets and pattern gene datasets can be viewed in an interactive table on the page. Users can customize filters based on "Data Type", "Tissue/Cell Type", and "Organism". Clicking on the "Dataset ID" and "Gene Name" allows access to the corresponding detailed information page.

    ANALYSIS
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    Classification results of gene expression patterns are obtained through Clust and regression analysis. When users upload correct gene expression data and corresponding sample time information files, analysis results are displayed and downloadable result files are provided.

    Step 1: Upload time series gene expression data file.

    Step 2: Upload sample information data file.

    Step 3: Submit

    Consequently, clustering and regression analysis yield classification results for gene expression patterns. Users can download compressed files containing all the results by clicking the "Download All Result" button.

    STATISTICS
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    In the "Statistics" page, the statistics of the time course datasets in multiple perspectives are illustrated.

    DOWNLOAD
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    The Download page provides access to time course datasets information, available GeTeSEP data, model analysis results, and gene expression profiles for each dataset, all of which can be downloaded.

    HELP
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    On the help page, the introduction of the features and the guidelines for the functions are stated. The contact details are attached at the bottom.

    • Please feel free to contact Prof. Jianbo Pan with respect to any details pertaining to GeTeSEP.
    • >Address :

      Center for Novel Target and Therapeutic Intervention, Institute of Life Sciences, Chongqing Medical University,

      No. 1 Yixueyuan Road, Yuzhong District, Chongqing, 400016, P. R. China.

    • >Email :

      panjianbo@cqmu.edu.cn