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alexlenail committed Apr 18, 2023
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4 changes: 2 additions & 2 deletions _data/people.yml
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id: JuliaJoung
alum: false

- name: Alex Schnell
- name: Alexandra Schnell
pos: Post-doc
email: [email protected]
id: AlexSchnell
id: AlexandraSchnell
alum: false

- name: Pu Zheng
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105 changes: 105 additions & 0 deletions _data/publications.yml
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- title: Comparative landscape of genetic dependencies in human and chimpanzee stem
cells.
authors:
- Richard She
- Tyler Fair
- Nathan K Schaefer
- Reuben A Saunders
- Bryan J Pavlovic
- Jonathan S Weissman
- Alex A Pollen
publication_date: 31/03/23
publication_year: '2023'
pubmed_id: '36993685'
abstract: 'Comparative studies of great apes provide a window into our evolutionary
past, but the extent and identity of cellular differences that emerged during
hominin evolution remain largely unexplored. We established a comparative loss-of-function
approach to evaluate whether changes in human cells alter requirements for essential
genes. By performing genome-wide CRISPR interference screens in human and chimpanzee
pluripotent stem cells, we identified 75 genes with species-specific effects on
cellular proliferation. These genes comprised coherent processes, including cell
cycle progression and lysosomal signaling, which we determined to be human-derived
by comparison with orangutan cells. Human-specific robustness to '
doi: 10.1101/2023.03.19.533346
journal: biorxiv
- title: Microfluidics-free single-cell genomics with templated emulsification.
authors:
- Iain C Clark
- Kristina M Fontanez
- Robert H Meltzer
- Yi Xue
- Corey Hayford
- Aaron May-Zhang
- Chris D'Amato
- Ahmad Osman
- Jesse Q Zhang
- Pabodha Hettige
- Jacob S A Ishibashi
- Cyrille L Delley
- Daniel W Weisgerber
- Joseph M Replogle
- Marco Jost
- Kiet T Phong
- Vanessa E Kennedy
- Cheryl A C Peretz
- Esther A Kim
- Siyou Song
- William Karlon
- Jonathan S Weissman
- Catherine C Smith
- Zev J Gartner
- Adam R Abate
publication_date: 07/03/23
publication_year: '2023'
pubmed_id: '36879006'
abstract: Current single-cell RNA-sequencing approaches have limitations that stem
from the microfluidic devices or fluid handling steps required for sample processing.
We develop a method that does not require specialized microfluidic devices, expertise
or hardware. Our approach is based on particle-templated emulsification, which
allows single-cell encapsulation and barcoding of cDNA in uniform droplet emulsions
with only a vortexer. Particle-templated instant partition sequencing (PIP-seq)
accommodates a wide range of emulsification formats, including microwell plates
and large-volume conical tubes, enabling thousands of samples or millions of cells
to be processed in minutes. We demonstrate that PIP-seq produces high-purity transcriptomes
in mouse-human mixing studies, is compatible with multiomics measurements and
can accurately characterize cell types in human breast tissue compared to a commercial
microfluidic platform. Single-cell transcriptional profiling of mixed phenotype
acute leukemia using PIP-seq reveals the emergence of heterogeneity within chemotherapy-resistant
cell subsets that were hidden by standard immunophenotyping. PIP-seq is a simple,
flexible and scalable next-generation workflow that extends single-cell sequencing
to new applications.
doi: 10.1038/s41587-023-01685-z
journal: Nature biotechnology
- title: A dual sgRNA library design to probe genetic modifiers using genome-wide
CRISPRi screens.
authors:
- Alina Guna
- Katharine R Page
- Joseph R Replogle
- Theodore K Esantsi
- Maxine L Wang
- Jonathan S Weissman
- Rebecca M Voorhees
publication_date: 31/01/23
publication_year: '2023'
pubmed_id: '36711738'
abstract: The ability to map genetic interactions has been essential for determining
gene function and defining biological pathways. Therefore, a system to readily
perform genome-wide genetic modifier screens in human cells is a powerful platform
for dissecting complex processes in mammalian cells, where redundancy and adaptation
commonly mask the phenotype of a single genetic perturbation. Here, we report
a CRISPR interference (CRISPRi) based platform, compatible with Fluorescence Activated
Cell Sorting (FACS)-based reporter screens, that can be used to query epistatic
relationships at scale. This is enabled by a flexible dual-sgRNA library design
that allows for the simultaneous delivery and selection of a fixed sgRNA and a
second randomized guide, comprised of a genome-wide library, with a single transduction.
As a proof of principle, we apply our approach to study the pathways that mediate
tail-anchored (TA) protein insertion at the endoplasmic reticulum (ER). We show
that this dual-guide library approach can be successfully coupled with FACS-based
reporter screening, to identify genetic epistasis and thereby place TA biogenesis
factors in their respective parallel pathways. We demonstrate that this dual-guide
approach is both more sensitive and specific than traditional growth screening
approaches, and is ideally suited for dissecting the complex interplay between
factors in human cells.
doi: 10.1101/2023.01.22.525086
journal: biorxiv
- title: Maximizing CRISPRi efficacy and accessibility with dual-sgRNA libraries and
optimal effectors.
authors:
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