Mark Hartmann
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mphartmann.bsky.social
Mark Hartmann
@mphartmann.bsky.social
Scientist at DKFZ and NCT Heidelberg

#epigenetics #stemcells #leukemia #colorectalcancer #multiomics #precisiononcology
#oncofetal #reprogramming
#plasticity

www.translational-cancer-epigenomics.de
Pinned
ONLINE FIRST ALERT!

Molecular #Plasticity Results in #Oncofetal #Reprogramming and Therapeutic Vulnerabilities in Juvenile Myelomonocytic Leukemia

aacrjournals.org/bloodcancerd...

@aacrjournals.bsky.social

#childhoodcancer
#epigenetics
#precisiononcology
New Spotlight in @aacrjournals.bsky.social

#Oncogene × #Ontogeny × #Plasticity shape leukemia biology & therapy response.

Two complementary studies show: mutations alone don’t explain disease behavior—developmental state and cellular plasticity matter.

aacrjournals.org/bloodcancerd...

🩸🧬
EpiSci
A Triumvirate of Transformation: Oncogene, Ontogeny, and Plasticity
Summary:. Cancer cells display extensive heterogeneity that influences therapy response and clinical outcome, yet the underlying mechanisms remain incompletely understood. Recent studies reveal that t...
aacrjournals.org
February 4, 2026 at 6:28 PM
Reposted by Mark Hartmann
Very pleased to share our latest pre-print which showcases the incredible hard work and skill of Dr Okan Sevim.

Our continued exploration of β-catenin's contribution to the post transcriptional landscape of blood cells led us to a LIN28B interaction.

1/7

www.biorxiv.org/content/10.6...
Dual targeting a LIN28B:β-catenin axis in acute myeloid leukaemia
Wnt/β-catenin signalling is dysregulated across several haematological malignancies, including acute myeloid leukaemia (AML), where is lacks effective targeting strategies. Previously, we discovered that β-catenin interacts with several RNA-binding proteins (RBP), and binds mRNA indirectly, indicating contributions to the post-transcriptional landscape of leukaemia cells. Here, we found the most frequent RBP-binding motif amongst β-catenin-bound mRNAs was the GGAG motif targeted by the oncofoetal expressed miRNA-regulating RBP LIN28B. We detected the β-catenin:LIN28B interaction in lymphoid and myeloid cell lines, and primary human CD34⁺ fetal liver-derived haematopoietic stem cells. LIN28B positively regulated Wnt signalling capacity by regulating LEF1 expression through a post-transcriptional mechanism requiring the let7 miRNA axis. Further miRNA sequencing of β-catenin- and LIN28B-depleted myeloid cells revealed both potential cooperative and antagonistic function in miRNA regulation. Finally, dual-targeting both β-catenin and LIN28B through either genetic or pharmacological means preferentially killed AML cells. These data reveal a potential novel synthetically lethal relationship in AML which could be exploited in the rare AML subsets where LIN28B expression becomes reactivated ### Competing Interest Statement The authors have declared no competing interest. Kay Kendall Leukaemia Fund, https://ror.org/03j2wfg84, KKL1051, KKL1446 Leukaemia & Myeloma Research UK, 4-5/06.21R Children’s Cancer & Leukaemia Group, CCLGA 2023 16 Morgan Republic of Türkiye Ministry of National Education
www.biorxiv.org
January 28, 2026 at 8:52 AM
Reposted by Mark Hartmann
🚨We have an opening for Data Scientists or Bioinformaticians using machine learning and AI with all kinds of molecular data to support cancer research. 🧬
Permanent position, fantastic team, exciting projects—what more could you ask for?
www.lih.lu/en/job/?valu...
Job » Luxembourg Institute of Health
Applications including a letter detailing your motivation and a curriculum vitae should be sent through our website via the apply button below.
www.lih.lu
January 15, 2026 at 10:36 AM
Reposted by Mark Hartmann
Out in print this week @bloodjournal.bsky.social . Very proud of this collaborative work with Prof Karadimitris @imperialimmuno.bsky.social. Thanks to @cancerresearchuk.org and CwC_UK for funding this work. #InfantALL @paediatrics.ox.ac.uk @imm.ox.ac.uk
Off-the-shelf bispecific CD133-CD19 CAR-iNKT cells eradicate CAR antigen–high and –low medullary and leptomeningeal KMT2Ar ALL. Read in Blood: buff.ly/HIlsUq7 #ALL #BloodJournal
January 12, 2026 at 6:09 PM
Frühkindliche Leukämie: Zellen reaktivieren fetale Programme
Forschende am Nationalen Centrum für Tumorerkrankungen (NCT) Heidelberg und am Deutschen Krebsforschungszentrum (DKFZ) haben neue Erkenntnisse gewonnen, wie eine bestimmte frühkin...
weiterlesen
January 8, 2026 at 4:11 PM
Interesting story about the role of #oncofetal RNA-binding proteins in #immune #evasion in #ovarian #cancer.
January 8, 2026 at 1:14 PM
Reposted by Mark Hartmann
Epigenetics that matters! Very cool work on hard to hard-to-access cell types . Finally some solid epigenetics examples that should be used in textbooks! Congrats to Mathieu and team @embl.org Rome!
January 7, 2026 at 3:53 PM
Reposted by Mark Hartmann
Neue Erkenntnisse zu frühkindlicher Leukämie: Leukämiezellen können Programme aus der fetalen Entwicklung erneut aktivieren. Die Ergebnisse eröffnen neue Angriffspunkte für Diagnostik und Therapie.
www.nct-heidelberg.de/das-nct/news...

@dkfz.bsky.social @mphartmann.bsky.social @dblipka.bsky.social
December 15, 2025 at 1:48 PM
ONLINE FIRST ALERT!

Molecular #Plasticity Results in #Oncofetal #Reprogramming and Therapeutic Vulnerabilities in Juvenile Myelomonocytic Leukemia

aacrjournals.org/bloodcancerd...

@aacrjournals.bsky.social

#childhoodcancer
#epigenetics
#precisiononcology
December 6, 2025 at 12:59 AM
Looks awesome!
🧬 CellWhisperer introduces a chat-based way to explore scRNA-seq data. By enabling natural language analysis, it bridges biologists and bioinformaticians—paving the way for AI-driven bioinformatics assistants. (10/11)
November 12, 2025 at 1:18 PM
October 7, 2025 at 8:26 PM
Pioneers of Epigenetics honored: Davor Solter & Azim Surani receive the 2026 Paul Ehrlich & Ludwig Darmstaedter Prize. Their discovery of genomic imprinting revealed why mammals need both parents—opening the field of epigenetics.

#Epigenetics #GenomicImprinting #PaulEhrlichPrize #CanSky #Science
September 26, 2025 at 4:17 PM
The German Science and Humanities Council declares permanent positions the new standard.

Interview with @wickwolfgang.bsky.social & Insa Großkraumbach
@wissenschaftsrat.de

A must-read for all working in higher education and research in Germany!

#Wissenschaft
#Forschung
#WissZeitVG
#IchBinHanna
Schluss mit "Up or Out"
Der Wissenschaftsrat erklärt Dauerstellen zum Regelfall. Ein Paukenschlag vor der Novelle des Wissenschaftszeitvertragsgesetzes. Im Interview erklären Wolfgang Wick und Insa Großkraumbach, was das bedeutet.
Im Wiarda-Blog: www.jmwiarda.de/blog/2025/07...
July 17, 2025 at 12:11 PM
Fascinating!
Excited to share our preprint on the molecular architecture of heterochromatin in human cells 🧬🔬w/ @jpkreysing.bsky.social, @johannesbetz.bsky.social,
@marinalusic.bsky.social, Turoňová lab, @hummerlab.bsky.social @becklab.bsky.social @mpibp.bsky.social

🔗 Preprint here tinyurl.com/3a74uanv
April 13, 2025 at 8:10 AM
Reposted by Mark Hartmann
🔬 New from the Farnung Lab: We established a fully in vitro reconstituted chromatin replication system and report the first cryo-EM snapshots of the human replisome engaging nucleosomes. Brilliant work by @felixsteinruecke.bsky.social with support from @jonmarkert.bsky.social! tinyurl.com/replisome
April 6, 2025 at 9:45 AM
Congratulations, Muzz!
The most deserving winner of the 2025 Tickle Medal is Muzlifah Haniffa!
bsdb.org/2025/03/24/2...
March 25, 2025 at 6:55 AM
Summer Selection of the International #PhD Program at the German Cancer Research Center (@dkfz.bsky.social)

Apply here: t1p.de/amwgq

#CancerResearch
#DataScience
#Bioinformatics
#SolidCancer
#Leukemia
#ChildhoodCancer
#RareCancer
#CanSky
#OncoSky
#HemeSky
March 19, 2025 at 2:12 PM
Reposted by Mark Hartmann
🦎 Differential expression analysis relies on cluster identities, unless you perform a regression along continuous representation in latent space. LEMUR from @const-ae.bsky.social & @wkhuber.bsky.social does that neatly for scRNA-seq data!
🔗 doi.org/10.1038/s415... 🧪 @naturegenet.bsky.social
Analysis of multi-condition single-cell data with latent embedding multivariate regression
Nature Genetics - Latent embedding multivariate regression models multi-condition single-cell RNA-seq using a continuous latent space, enabling data integration, per-cell gene expression prediction...
doi.org
March 19, 2025 at 7:44 AM
Amazing collection of reviews on developmental hematopoiesis from leaders in the field. Just out in @iseh.bsky.social journal, Experimental Hematology www.exphem.org/content/edit...
Editorial_Making_blood_Early_Hematopoietic_Development
www.exphem.org
March 12, 2025 at 8:25 PM
Reposted by Mark Hartmann
Outstanding contributions to our field and society acknowledged with this year’s ISEH awards. Presentations and award seminars at this year’s annual meeting in Kumamoto iseh.org/page/iseh2025
March 11, 2025 at 3:52 PM
Actually, not so rare at all!

#RareDiseaseDay

Affecting a substantial part of human kind!

Support research on rare diseases!

Picture from rarediseaseday.org
February 28, 2025 at 7:27 PM
Reposted by Mark Hartmann
To conclude our #RareDiseaseDay series, we spoke with @ellouka.bsky.social, a clinician scientist researching Paediatric Myelodysplastic Syndromes (MDS) and Juvenile Myelomonocytic Leukaemia (JMML). These are incredibly rare childhood cancers, with no current treatment options available. 🧪
Rare Disease Day 2025: Paediatric Leukaemias
YouTube video by MRC Weatherall Institute of Molecular Medicine
youtu.be
February 28, 2025 at 10:28 AM