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Workshop Schedule

Pre-reading

Day 1

Time Topic Instructor
09:30 - 09:45 Workshop introduction Noor
09:45 - 10:15 Pre-reading review and Q&A All
10:15 - 10:25 Break
10:25 - 11:00 Project setup and data exploration Noor
11:00 - 11:50 Differential expression analysis using FindMarkers() Meeta
11:50 - 12:00 Overview of self-learning materials and homework submission Meeta

Before the next class:

I. Please study the contents and work through all the code within the following lessons:

  1. Aggregating counts by celltype using pseudobulk approach
    Click here for a preview of this lesson
    Forming pseudobulk samples is important to perform accurate differential expression analysis. Treating each cell as an independent replicate leads to underestimation of the variance and misleadingly small p-values. Working on the level of pseudobulk ensures reliable statistical tests because the samples correspond to the actual units of replication.

    In this lesson you will:
    - Aggregate counts for a given celltype
    - Demonstrate an efficent way to aggregate counts for multiple celltypes
    - Use the aggregated counts to create a DESeq2 object for downstream analysis

  1. DE analysis of pseudobulk data using DESeq2
    Click here for a preview of this lesson
    The next step is to take the DESeq2 object and run through the analysis workflow to identify differentially expressed genes.

    In this lesson you will:
    - Perform sample level QC
    - Evaluate gene-wise dispersions to evalute model fit
    - Extract results and understand the statistics generated

II. Submit your work:

  • Each lesson above contains exercises; please go through each of them.
  • Submit your answers to the exercises using this Google form on the day before the next class.

Questions?

  • If you get stuck due to an error while running code in the lesson, email us

Day 2

Time Topic Instructor
09:30 - 10:00 Self-learning lessons discussion All
10:00 - 10:40 Visualization of differentially expressed genes Meeta
10:40 - 10:50 Break
10:50 - 12:00 Comparison of results from different DE approaches Noor

Before the next class:

I. Please study the contents and work through all the code within the following lessons:

  1. Functional Analysis
    Click here for a preview of this lesson
    Now that we have significant genes, let's gain some biological insight

    In this lesson, we will:
    - Discuss approaches for functional analysis
    - Use clusterProfiler to run over-representation analsyis and visualize results
    - Use clusterProfiler to run GSEA

II. Submit your work:

  • Each lesson above contains exercises; please go through each of them.
  • Submit your answers to the exercises using this Google form on the day before the next class.

Questions?

  • If you get stuck due to an error while running code in the lesson, email us

Day 3

Time Topic Instructor
09:30 - 10:15 Self-learning lessons discussion All
10:15 - 11:15 Methods for Differental Abundance Noor
11:15 - 11:20 Break
11:25 - 12:00 Discussion and Q&A All
11:45 - 12:00 Wrap-up Meeta

Answer Keys

Resources