Geoffrey Maher
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geoffreymaher.bsky.social
Geoffrey Maher
@geoffreymaher.bsky.social
Imperial College London
Human Genetics | Gestational Trophoblastic Disease | Placenta | Germ Cells
Reposted by Geoffrey Maher
Stacey, was diagnosed with GTD in December 2024 after going to the doctors with irregular periods. To her surprise, tests showed she was pregnant. Stacey was then given the devastating news that she had cancer.

Read Stacey's inspirational story here: cancertreatment.org.uk/stacey-story/
November 18, 2025 at 9:01 AM
Reposted by Geoffrey Maher
Interesting story in this preprint.

A male infant was diagnosed with Fanconi anemia due to an X-linked frameshift mutation.

Three years later, his hematopoiesis became normal (without intervention). How?

www.medrxiv.org/content/10.1...
Multi-lineage natural gene therapy mediated by embryonic triploid mosaicism in the context of Fanconi anaemia
Fanconi anemia is a rare inherited bone marrow failure syndrome caused by inactivation of genes in the Fanconi anemia/BRCA DNA repair pathway. We report a patient with X-linked Fanconi anemia, and aty...
www.medrxiv.org
November 5, 2025 at 8:04 AM
Reposted by Geoffrey Maher
An Interview with Azim Surani

Ashley Moffett and @geraldinejowett.bsky.social spoke to Azim, recipient of both the 2025 Kyoto Prize and 2026 Paul Ehrlich and Ludwig Darmstaedter Prize, about his non-traditional and inspirational route into academia:

journals.biologists.com/dev/article/...
October 9, 2025 at 5:05 PM
Interested in using your computational biology skills to advance understanding of rare tumours and identify biomarkers that will lead to personalised medicine? We have a postdoctoral position open to analyse a unique group of tumours that arise from the placenta.
www.imperial.ac.uk/jobs/search-...
Description
Please note that job descriptions are not exhaustive, and you may be asked to take on additional duties that align with the key responsibilities ment...
www.imperial.ac.uk
September 22, 2025 at 5:35 PM
Reposted by Geoffrey Maher
In these dark times, it comes as a rare pleasure to highlight @natanaels.bsky.social ‬ & @marcdemanuel.bsky.social's work on germline and somatic mutations in humans. 1/n
www.biorxiv.org/cgi/content/...
Collateral mutagenesis funnels multiple sources of DNA damage into a ubiquitous mutational signature
Mutations reflect the net effects of myriad types of damage, replication errors, and repair mechanisms, and thus are expected to differ across cell types with distinct exposures to mutagens, division ...
www.biorxiv.org
September 2, 2025 at 11:44 AM
Reposted by Geoffrey Maher
While helping out on a cool genomics project recently, I came to realise I’d been taught a pretty big inaccuracy about the events that occur at fertilization. I suspect that almost everyone reading this has the same misapprehension, so let’s do some learning together: 1/
May 30, 2025 at 6:51 PM
Edu Calpena #ESHG2025
@educalpena.bsky.social

Ectopic SIX3 expression underlies the craniofacial syndrome caused by deletions at the SIX2 locus

"Ectopic expression of SIX3 in the SIX2 territory"

2p21 deletions with TAD disruption shown below
May 27, 2025 at 10:36 AM
This is an amazing talk on the role of somatic mutation and repeat expansion in an inherited genetic disease
Keynote talk from Steven McCarroll from last weeks Biology of Genomes conf. My favorite talk of the whole meeting! #bog25 youtu.be/BCRAlmFv7ag?...
CSHL Keynote, Dr. Steven McCarroll, Harvard Medical School + Broad Institute
YouTube video by CSHL Leading Strand
youtu.be
May 16, 2025 at 11:30 AM
Reposted by Geoffrey Maher
Remember when you first learned about genetics at school? All those fascinating examples of human traits that are each apparently determined by just a single gene? Time to check in on some of your favourites to see how they’re doing. 🧬🧵🧪 1/n
May 2, 2025 at 2:50 PM
Reposted by Geoffrey Maher
Long-read sequencing of large pedigrees is an ideal way to map all classes of denovo mutations! A collaboration between University of Utah, University of Washington, and PacBio. Glad to be a part of this project 👏

www.nature.com/articles/s41...
Human de novo mutation rates from a four-generation pedigree reference - Nature
Analysis of more than 95% of each diploid human genome of a four-generation, twenty-eight-member family using five complementary short-read and long-read sequencing technologies provides a truth set t...
www.nature.com
April 23, 2025 at 4:11 PM
Reposted by Geoffrey Maher
Delete your 23&Me data.

A bankrupt company is at risk of losing control over what happens to its assets. If your genome is such an asset, your genome could end up somewhere you would never have agreed to in the first place,
March 24, 2025 at 11:04 AM
Reposted by Geoffrey Maher
We are hiring! 3-year BBSRC-funded postdoc position available. TEs, epigenetics, pregnancy: if you love one or more of these keywords, apply through the link below.
Please spread the word.
Postdoctoral Research Associate - QMUL Jobs
ID: 4897. Title: Postdoctoral Research Associate . Application Deadline:
qmul-jobs.tal.net
January 21, 2025 at 9:33 AM
Reposted by Geoffrey Maher
Very proud of my grad students for putting together this comprehensive review on cell-free placental DNA. We found that reviews on the topic focus on clinical utility. Here we focus on basic science of cell-free placental DNA, what we know and current knowledge gaps
journals.plos.org/plosgenetics...
Cell-free placental DNA: What do we really know?
Author summary Cell-free DNA are fragments of free-floating DNA released by cells into blood circulation. During pregnancy, the placenta releases cell-free placental DNA (cfpDNA) into maternal blood c...
journals.plos.org
December 9, 2024 at 6:57 PM
Reposted by Geoffrey Maher
Most of the talks from our Oct meeting are now online, with a few more to come: www.precisionmedicine.columbia.edu/videos
December 5, 2024 at 3:47 PM
Reposted by Geoffrey Maher
I was reading about the genetics of ovarian aging, particularly on the link between breast cancer genes and age at menopause. The below plot is from a 2021 study that looked into rare variant associations with age at natural menopause using exome data of 50k women in the UK Biobank. 1/
December 1, 2024 at 5:06 PM
Reposted by Geoffrey Maher
Our (Turner lab.) latest preprint is out! 🐭🧬We show that sex chromosomes regulate the transcriptional and developmental landscape of the mouse preimplantation embryo.
www.biorxiv.org/content/10.1...
November 28, 2024 at 3:23 PM
Reposted by Geoffrey Maher
Want to make beautiful scientific figures? Easy!

The NIH released a library of 2000+ free scientific illustrations called *BioArt*.

Check it out! bioart.niaid.nih.gov

#AcademicSky #PsychSciSky 🧠🟦 🧪
October 30, 2024 at 9:45 AM
Reposted by Geoffrey Maher
November 14, 2024 at 10:23 AM
Reposted by Geoffrey Maher
Super excited to have this out! 🥳

We identify RNU4-2 as a new neurodevelopmental disorder (NDD) gene. We estimate that variants in an 18 bp region of this non-coding RNA explain ~0.4% of all individuals with NDD 😮

Led by a super talented DPhil student Yuyang Chen 🌟

🧬🖥️
April 8, 2024 at 7:08 PM