Alex Baras Profile
Alex Baras

@alexander_baras

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Associate Professor of Pathology, Urology, and Oncology. Director of Precision Medicine Informatics. Johns Hopkins Sidney Kimmel Comprehensive Cancer Center.

Joined September 2020
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@John_Will_I_Am
𝐉𝐨𝐡𝐧-𝐖𝐢𝐥𝐥𝐢𝐚𝐦 𝐒𝐢𝐝𝐡𝐨𝐦, 𝐌𝐃, 𝐏𝐡𝐃
5 years
My favorite part is this -> For the first time, we describe the ability of a model to regress a proxy for TCR binding affinity with a deep learning model. We demonstrate in doing this from TCR-TetSeq, we can determine the binding contacts of a TCR from high-throughput NGS data!
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@John_Will_I_Am
𝐉𝐨𝐡𝐧-𝐖𝐢𝐥𝐥𝐢𝐚𝐦 𝐒𝐢𝐝𝐡𝐨𝐦, 𝐌𝐃, 𝐏𝐡𝐃
5 years
When using this block within a supervised sequence classification task, we see (unsurprisingly) leveraging antigen-specific labels improves the learning of these models. Furthermore, the convolutional layers of the network allow us to extract the learned "motifs."
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@John_Will_I_Am
𝐉𝐨𝐡𝐧-𝐖𝐢𝐥𝐥𝐢𝐚𝐦 𝐒𝐢𝐝𝐡𝐨𝐦, 𝐌𝐃, 𝐏𝐡𝐃
5 years
We first utilize this block in a Variational Autoencoder (VAE) and demonstrate improved antigen-specific clustering over current state-of-the-art methods.
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@John_Will_I_Am
𝐉𝐨𝐡𝐧-𝐖𝐢𝐥𝐥𝐢𝐚𝐦 𝐒𝐢𝐝𝐡𝐨𝐦, 𝐌𝐃, 𝐏𝐡𝐃
5 years
The core of all our deep learning methods is a deep learning "featurization" block which learns a joint representation of TCR-Seq inputs (CDR3 sequence, V/D/J gene usage). In our latest version, we even incorporate HLA background as a possible input (more on this later).
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@John_Will_I_Am
𝐉𝐨𝐡𝐧-𝐖𝐢𝐥𝐥𝐢𝐚𝐦 𝐒𝐢𝐝𝐡𝐨𝐦, 𝐌𝐃, 𝐏𝐡𝐃
5 years
#DeepTCR is a comprehensive deep learning framework for doing both unsupervised & supervised analyses at the sequence and repertoire level. Github 👇 https://t.co/aEHJlBszn3 Docs 👇 https://t.co/FZJeFWa2MA Tutorials 👇 https://t.co/U1zNnhngVa
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github.com
Deep Learning Methods for Parsing T-Cell Receptor Sequencing (TCRSeq) Data - sidhomj/DeepTCR
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@John_Will_I_Am
𝐉𝐨𝐡𝐧-𝐖𝐢𝐥𝐥𝐢𝐚𝐦 𝐒𝐢𝐝𝐡𝐨𝐦, 𝐌𝐃, 𝐏𝐡𝐃
5 years
In 2017, I attended a talk by @Google at @AACR on #DeepLearning. I realized then the potential for deep learning for analyzing TCR-Seq data & thus, the idea for #DeepTCR was born. 4 years later, our manuscript is now available at @NatureComms https://t.co/Gx6ujCt9ux
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nature.com
Nature Communications - The advent of high-throughput T-cell receptor sequencing has allowed for the rapid and thorough characterization of the adaptive immune response. Here the authors show how...
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@John_Will_I_Am
𝐉𝐨𝐡𝐧-𝐖𝐢𝐥𝐥𝐢𝐚𝐦 𝐒𝐢𝐝𝐡𝐨𝐦, 𝐌𝐃, 𝐏𝐡𝐃
5 years
Finally, we provide "explainable AI" by incorporating an integrated gradients approach to reveal the relevant morphological features that are characteristic of APL. Surprisingly, we found our model did not identify Auer rods as being specific/sensitive for APL.
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@John_Will_I_Am
𝐉𝐨𝐡𝐧-𝐖𝐢𝐥𝐥𝐢𝐚𝐦 𝐒𝐢𝐝𝐡𝐨𝐦, 𝐌𝐃, 𝐏𝐡𝐃
5 years
Our #ASH2020 abstract is now live! We present a multiple-instance deep learning model capable of rapidly identifying t(15;17) #APL from peripheral smear, potentially allowing more timely and appropriate therapy to this aggressive form of leukemia. https://t.co/rkeP6RHtyK
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