Chris Hsiung

👋 add me !

My lab at UCSF is recruiting postdoc candidates interested in CRISPR synthetic biology and functional genomics approaches to study and engineer tissue injury responses! hsiunglab.org

Single-cell susceptibility to viral infection is driven by variable cell states Not all cells that can be infected by a virus become infected with that virus. Single-cell clone tracing reveals intrinsic cell states with variable expression patterns that increase susceptibility to...

So awesome to have this great paper from Sam Reffsin and Sara Cherry out! In it, we use retrospective clone tracing to show that there are particular single cell states that are more susceptible to viral infection (both SARS-CoV-2 and flu)!

www.cell.com/cell/fulltex...

biology is so cool because like every week someone is like "Dr. Smith is coming to campus! She is the world expert in blargyblarg!"

And i'm like A) never heard of blargyblarg, B) look it up, it's super important and interesting

Thanks for highlighting the relevance to our prior work....Can't wait to see what more this line of discoveries leads to!

(3/n) Do mitotic microcompartments have a transcriptional function?
Prior work from @chrishsiung.bsky.social Gerd Blobel discovered 'mitotic transcriptional spiking', where ~half of genes transcriptionally spike in mitosis.
We now show that microcompartment dot number and strength predicts spiking

Really excited to share our latest work led by @mattiaubertini.bsky.social and @nesslfy.bsky.social: we report that cohesin loop extrusion creates rare but long-lived encounters between genomic sequences which underlie efficient enhancer-promoter communication.
www.biorxiv.org/content/10.1...
A🧵👇

The nuclear periphery confers repression on H3K9me2-marked genes and transposons to shape cell fate - Nature Cell Biology Marin et al. report the role of lamin proteins and the lamin B receptor (LBR) in chromatin positioning at the nuclear periphery. Knockout of all lamins and LBR in mouse embryonic stem cells leads to h...

Another paper bluetorial! Today: how does the spatial location of genes influence their function? (1/n) www.nature.com/articles/s41...

Specificity, length, and luck: How genes are prioritized by rare and common variant association studies Standard genome-wide association studies (GWAS) and rare variant burden tests are essential tools for identifying trait-relevant genes. Although these methods are conceptually similar, we show by anal...

What do GWAS and rare variant burden tests discover, and why?

Do these studies find the most IMPORTANT genes? If not, how DO they rank genes?

Here we present a surprising result: these studies actually test for SPECIFICITY! A 🧵on what this means... (🧪🧬)

www.biorxiv.org/content/10.1...

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Global inhibition of deadenylation stabilizes the transcriptome in mitotic cells In the presence of cell division errors, mammalian cells can pause in mitosis for tens of hours with little to no transcription, while still requiring continued translation for viability. These unique...

New preprint! We solve a mystery you didn't know existed. Mitotic cells lack new transcription but require ongoing translation. Interphase mRNA half life is only 2-4 hrs. So how do cells arrest in mitosis for hours without depleting their transcriptomes?

www.biorxiv.org/content/10.1...

we are very interested using our recently developed combinatorial Cas12a CRISPRi platform. happy to chat!

EPIGENETIC HULK READY TO SMASH AGAIN! GET IN LOSERS!

#FragileNucleosome seminar happening tomorrow!

Looking forward to sharing our work in the #FragileNucleosome series!

We're still recruiting!

We've successfully recruited one postdoc. We are still looking to recruit one more postdoc especially candidates with wet/dry lab hybrid background in genome regulation and/or interests in functional genomics approaches in novel human tissue biology models.

Excited to share James Jusuf's preprint:

By integrating Micro-C with SuperRes Live-Imaging we can calibrate genomics&imaging to perform absolute quantification of looping (e.g. this loop is present 3%)

We quantify mESC 36k loops: <loops> are generally rare (2.3%)

www.biorxiv.org/content/10.1...

Happy new year! Our lab (hsiunglab.org) at UCSF is moving forward to next stages in our search for postdoc candidates. The positions are still open -- if interested please apply soon!

A little fun with numbers on this Sunday, showing just how successful DNA really is. First, here's what DNA looks like. I'll draw your attention to the "rise" in DNA, that is, the distance between two basepairs, which is 3.4 Angstroms, also known as 3.4x10^-10 meters...

Honored to be endorsed in your first post here!!

Where appropriate there would be exceptional opportunities to work collaboratively with the help of junior specialists in the lab, as well as with other UCSF labs with complementary expertise.

We esp. welcome individuals who add to our capabilities and perspectives in computation or specific biological domains in tissue biology.

My lab at UCSF (hsiunglab.org) is looking to recruit multiple postdocs across the spectrum of wet/dry lab interests to contribute to our research in synthetic gene regulation, combinatorial genetics, and tissue biology (including liver biology and immuno-oncology).