Tom Sasani

Common variation in meiosis genes shapes human recombination and aneuploidy - Nature Analysis of data from pre-implantation genetic testing sheds light on the genetic basis of meiotic-origin aneuploidy, the leading cause of human pregnancy loss, identifying common genetic variants ass...

Pregnancy loss is common in humans, and chromosomal abnormalities are the leading cause. Using genetic data from ~140,000 IVF embryos, we show that maternal variation in meiosis genes influences recombination and aneuploidy risk.

First authors: @saracarioscia.bsky.social & @aabiddanda.github.io

I am hiring a staff bioinformatician for my new lab at the University of Utah! Please consider applying if you are on the hunt:
employment.utah.edu/salt-lake-ci...

We are thrilled to announce the first official release (v0.1.8) of #𝗯𝗲𝗱𝗱𝗲𝗿, the successor to one of our flagship tool, #𝗯𝗲𝗱𝘁𝗼𝗼𝗹𝘀! Based on ideas we conceived of long ago (!), this was achieved thanks to the dedication of Brent Pedersen.

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Landscape of parental postzygotic mutations in >11,000 rare disease trios Postzygotic mutations (PZMs) arising post-fertilisation, prior to primordial germ cell specification, may be subsequently inherited by both somatic and germ cells, causing somatic mosaicism in the par...

New preprint from another part of my PhD! 📝👇

Some mutations arise after fertilisation 🧬, so early they can appear in both a parent’s body and their germ cells.
By analysing family trio genomes 👪, we built one of the largest catalogues of these “hidden” inherited variants yet.

tinyurl.com/mvns2ytv

A signature-agnostic test for differences between tumor mutation spectra reveals carcinogen and ancestry effects Mutational signatures contain valuable information about the mutational processes shaping cancer genomes. However, despite dozens of tools to identify signatures in cancer samples, there is not an est...

If you’ve ever wondered about the statistical significance of differences among mutational signature profiles, check out our new Aggregate Mutation Spectrum Distance (AMSD) preprint co-led by Sam Hart and @alisonfeder.bsky.social with @nalcala.bsky.social www.biorxiv.org/cgi/content/...

Epistasis between mutator alleles contributes to germline mutation spectrum variability in laboratory mice Germline mutation rates in mice are shaped by two mutator alleles that interact epistatically, showing that DNA repair defects that map to different loci can have snowballing effects.

Excited to share my latest with @kelleyharris.bsky.social and @aaronquinlan.bsky.social, now out as an eLife "version of record!" We found evidence for a second germline mutator allele in a population of 🐁 RILs, adding even more complexity to the story of mutation spectrum variation in lab mice.