Sandra Segura-Bayona
@ssegurabayona.bsky.social
420 followers 470 following 9 posts
Postdoctoral researcher in the Boulton Lab 🧬 The Francis Crick Institute, London, UK▪️interest in genome stability, chromatin, cancer 🧫 👩‍🔬 EMBO and MSCA fellow
Posts Media Videos Starter Packs
ssegurabayona.bsky.social
Together, this work redefines ATRX as a dual-function guardian of genome stability, with implications for ATR-X syndrome and ATRX-mutant cancers.

🙏 Deeply grateful to all co-authors @boultonlab.bsky.social and @crick.ac.uk STPs for their outstanding support!
ssegurabayona.bsky.social
We uncover that ATRX restrains the recruitment of FAM111A to replication forks, thereby preventing DNA damage.

Distinct ATRX domains mediate these protective roles: ATPase activity suppresses telomeric ssDNA formation, while the PIP-box motif mitigates replication stress across the genome.
ssegurabayona.bsky.social
We identify that ATRX engages in distinct context-dependent genetic interactions: ATRX:CST synthetic lethality manifests following G-rich ssDNA accumulation & telomere loss, while ATRX:9-1-1 interaction emerges following replication fork collapse.
Reposted by Sandra Segura-Bayona
puckknipscheer.bsky.social
Are you interested in working on related projects? 🌱
The Knipscheer lab at the Hubrecht Institute (Utrecht, the Netherlands) has openings for a postdoc and a PhD position.
Apply here: www.hubrecht.eu/jobs
ssegurabayona.bsky.social
These findings highlight the role of endogenous replication stress in shaping cancer biology & therapy response.

Huge thanks to colleagues @crick.ac.uk @boultonlab.bsky.social and collaborators @thijnbrummel.bsky.social @thecesarelab.bsky.social for their brilliant support in this project!
ssegurabayona.bsky.social
When SLFN11 is lost, cells escape this safeguard, enabling immortalization and therapy resistance.

This helps explains why:
- SLFN11 is frequently inactivated in treatment-naïve cancers
- ALT-positive tumours tend to resist chemotherapy and have poor prognosis
Reposted by Sandra Segura-Bayona
nussenza.bsky.social
Cytarabine has been the mainstay for AML treatment for over 50 years. This chemotherapy can lead to problems with movement and balance. Here we explain this neurotoxic side-effect. www.nature.com/articles/s41... Work led by Jia-Cheng Liu, Donpeng Wang and Elsa Callen and terrific collaborators!
Mechanism of cytarabine-induced neurotoxicity - Nature
Certain antimetabolites used to treat cancer are more neurotoxic than others, and it is now shown that this is due to their greater tendency to generate DNA double-stranded breaks, whereas less n...
www.nature.com
ssegurabayona.bsky.social
Congratulations Puck and co-authors, this is such a beautiful paper!! 🌟
Reposted by Sandra Segura-Bayona
romangp.bsky.social
Save de date! Join us at @cabimer.bsky.social on October 17th for the @GenomaHubCSIC Workshop in "Genome Dynamics in Development and Disease". Slots available for talks! Registration opens soon!!
Reposted by Sandra Segura-Bayona
zhalab.bsky.social
Are you ready for the 2nd half of 2025? Social DNAing is ready. Check out the speaker list and schedule! Sign up at www.cancer.columbia.edu/research/pro...
Social DNAing June to Dec 2025
Reposted by Sandra Segura-Bayona
zhalab.bsky.social
Excited to share our new paper on Nature - how Ku accommodates Alu expansion in primates by binding to dsRNA, providing a clue for both the high levels of Ku and its essentiality in human cells. Thank @chaolinzhang @hchung03 @LenaSteckelberg More to come www.nature.com/articles/s41...
Ku limits RNA-induced innate immunity to allow Alu-expansion in primates - Nature
Nature - Ku limits RNA-induced innate immunity to allow Alu-expansion in primates
www.nature.com
Reposted by Sandra Segura-Bayona
alebrambati.bsky.social
Excited to share our latest from my postdoc at @mskcancercenter.bsky.social in the Sfeir Lab, in collaboration with the Simon Powell Lab! We uncovered a novel genome repair mechanism in human cells: RNA-templated DNA double-strand break repair (RT-DSBR). (1/5)
Reposted by Sandra Segura-Bayona
lopeslab.bsky.social
Exciting seminar series from Genome integrity italian Network (GiiN), chaired by myself and Raffaella Di Micco! Short talks (2x30’), at convenient time for EU/USA attendees. Big shots and raising stars in an expanding field. See flyers + link to receive email alerts. Please repost to your network!👇
Reposted by Sandra Segura-Bayona
grothlab.bsky.social
𝐇𝐨𝐰 𝐝𝐨 𝐜𝐞𝐥𝐥𝐬 𝐫𝐞𝐦𝐞𝐦𝐛𝐞𝐫 𝐰𝐡𝐨 𝐭𝐡𝐞𝐲 𝐚𝐫𝐞 𝐚𝐟𝐭𝐞𝐫 𝐃𝐍𝐀 𝐫𝐞𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧? Our new study “Disabling leading and lagging strand histone transmission results in parental histones loss and reduced cell plasticity and viability” is out in 𝘚𝘤𝘪𝘦𝘯𝘤𝘦 𝘈𝘥𝘷𝘢𝘯𝘤𝘦𝘴. Led by @lleonie.bsky.social @biranalva.bsky.social 🧵 More below👇
Disabling leading and lagging strand histone transmission results in parental histones loss and reduced cell plasticity and viability
Losing parental histones during DNA replication fork passage challenges differentiation competence and cell viability.
tinyurl.com
Reposted by Sandra Segura-Bayona
jcornlab.bsky.social
Cells are filled with toxic stuff that damages healthy proteins. Is that garbage just left to rot on the curb? No way! Ubiquitin ligases have evolved to recognize chemical damage and clean it up! www.nature.com/articles/s41...
C-terminal amides mark proteins for degradation via SCF–FBXO31 - Nature
SCF–FBXO31 scans proteins for C-terminal amidation and marks them for subsequent proteasomal degradation.
www.nature.com
Reposted by Sandra Segura-Bayona
shudongli.bsky.social
Merry Boulton Lab Retreat! Great fun team building and going over some hot topics in DDR/chromatin/immune biology. Same again next year please! @mattdnewton.bsky.social @ssegurabayona.bsky.social @federicaraguseo.bsky.social @claralnovo.bsky.social