Joris van de Haar, MD, PhD
banner
joris-vd-haar.bsky.social
Joris van de Haar, MD, PhD
@joris-vd-haar.bsky.social
Clinician-scientist / precision medicine / cancer immunology / bioinformatics / MD, PhD
@Netherlands Cancer Institute / ESMO precision medicine working group

Trying to have fun discovering stuff to help patients.
Opinions are my own.
Pinned
🚀 We’re hiring!
Join our team at the NKI as a Postdoc, using Quantitative Membrane Proteomics to design novel cancer immunotherapies!
Best of two worlds from the Voest and Lindeboom Labs.

Cutting-edge proteomics, translational immunotherapy and world-class instrumentation? let’s connect! 🔬💡
🚀 We’re hiring!
Join our team at the NKI as a Postdoc, using Quantitative Membrane Proteomics to design novel cancer immunotherapies!
Best of two worlds from the Voest and Lindeboom Labs.

Cutting-edge proteomics, translational immunotherapy and world-class instrumentation? let’s connect! 🔬💡
October 30, 2025 at 10:39 AM
Reposted by Joris van de Haar, MD, PhD
🚨 International Postdoctoral Positions Open at VHIO! 🚨
The VHIO VIDA Postdoctoral Program is now open!
We’re a fully funded position for international postdocs to work on cutting-edge exciting projects, develop professionally, and pave the way toward independence.
👉 vhiovidaprogramme.eu
Home - VIDA
vhiovidaprogramme.eu
October 4, 2025 at 7:32 AM
Very cool study! A very logical explanation for the fundamental question how non-stem cells “know” they need to become one after tissue damage. And is this deregulated in cancer?
📢 New preprint 🔥
1/ Stem cell regeneration is often viewed as an actively induced process, triggered by damage. But what if plasticity is actively suppressed by the stem cells themselves? We explored plasticity with 'new' cell type ablation tech in normal human colon organoids
tinyurl.com/3ky4ccxf
July 16, 2025 at 8:13 PM
Reposted by Joris van de Haar, MD, PhD
In today’s publication in Science we introduce Zincore: a novel protein of QRICH1 and SEPHS1 and functions as a transcriptional coregulator dedicated to zinc finger transcription factors. Here’s how we found it: 🧵 www.science.org/doi/10.1126/... 1/11
Zincore, an atypical coregulator, binds zinc finger transcription factors to control gene expression
Zinc finger proteins (ZNFs) are the largest family of transcription factors, yet how they activate gene expression remains unclear. In this study, we identified Zincore, a protein complex consisting o...
www.science.org
July 4, 2025 at 11:00 AM
Important work towards one of the holy grails in cancer immunotherapy: understanding/predicting/designing TCR specificities
May 5, 2025 at 5:19 AM
Highly recommended!
February 17, 2025 at 8:40 PM
Reposted by Joris van de Haar, MD, PhD
🤙🤙🤙 Precision oncology starter package
👉 One click to follow many of the most inspiring researchers around in precision oncology
go.bsky.app/xg4Y26

Comment if you want to join the evolving list
February 8, 2025 at 4:24 PM
Cool concept
Delighted to share our latest paper describing a method to read the levels of hundreds of metabolites or drugs in parallel using DNA sequencing. This method, which we call ‘smol-seq’ (Small MOLecule sequencing), harnesses the power of DNA sequencing for metabolite detection:
rdcu.be/d8xLv (1/6)
Quantifying metabolites using structure-switching aptamers coupled to DNA sequencing
Nature Biotechnology - Metabolites can be quantified using a combination of aptamers and DNA barcodes.
rdcu.be
February 4, 2025 at 3:17 PM
Imagine how many black and white pictures could have been published in full color
Between 2019 and 2023, researchers paid $8.968 billion to make papers open access. Imagine what else could be done with this money if it wasnt paid to for profit publishing companies...
👉 arxiv.org/abs/2407.16551
February 3, 2025 at 8:55 AM
Magnificent work from Monika Wolkers and team : γδ T cells are the prime anti-tumoral T cells in pediatric neuroblastoma

Another case where γδ T cells are the central effectors of anticancer immunity.

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

@forum-gd.bsky.social
γδ T cells are the prime anti-tumoral T cells in pediatric neuroblastoma
High-risk pediatric neuroblastoma patients have a dismal survival rate despite intensive treatment regimens. New treatment options are thus required. Even though HLA expression in neuroblastoma is low and immune cell infiltrates are limited, the presence of tumor infiltrating lymphocytes (TILs) is indicative for better patient survival. Here, we show that most tumor lesions contain viable immune cell infiltrates after induction chemotherapy, with high percentages of CD3+ T cells. We therefore expanded the TILs and tested their anti-tumoral activity. With sufficient starting material, TIL expansion was as efficient as for adult solid tumors. However, whereas TIL products from adult tumors almost exclusively contained αβ T cells, in neuroblastoma-derived TILs, γδ T cells expanded with similar efficacy as αβ T cells. Importantly, the anti-tumor responses in response to autologous tumor digest primarily originated from (Vδ1- and Vδ3-expressing) γδ T cells, and not from αβ T cells. In conclusion, this finding creates a window of opportunity for immunotherapy for neuroblastoma patients, with γδ T cells as potential prime responders. ### Competing Interest Statement The authors have declared no competing interest.
www.biorxiv.org
January 27, 2025 at 12:17 PM
Big if true: do cancer cells transfer mutated mitochondria into tumor infiltrating lymphocytes to impair their function? mtDNA is challenging to work with, so looking forward to see this finding confirmed. But cool concept and big congrats to the authors!

www.nature.com/articles/s41...
Immune evasion through mitochondrial transfer in the tumour microenvironment - Nature
Mitochondria with mutations in their DNA from cancer cells can be transferred to T cells in the tumour microenvironment, which leads to T cell dysfunction and impaired antitumour immunity.
www.nature.com
January 22, 2025 at 7:41 PM
1/2 Puzzling result from the DRUP study: the more mutations driving proliferation in a tumor, the less effect of targeting only one of them with specific drugs.

www.esmoopen.com/article/S205...
DEFINE_ME
www.esmoopen.com
January 8, 2025 at 1:11 PM
Bizarre story.

Genetic Analysis of a Sarcoma Accidentally Transplanted from a Patient to a Surgeon | New England Journal of Medicine www.nejm.org/doi/full/10....
Genetic Analysis of a Sarcoma Accidentally Transplanted from a Patient to a Surgeon | NEJM
Modern concepts of cancer immunology originated from the classic observations by Jensen, Loeb, Tyzzer, and Little in the early years of the 20th century of the rejection of transplanted allogeneic ...
www.nejm.org
January 5, 2025 at 6:03 PM
Reposted by Joris van de Haar, MD, PhD
Forget Die Hard vancomycin is a Christmas antibiotic
December 14, 2024 at 12:18 AM
I'm pleased to share that I will be speaking at the Clinical Cancer Genomics meeting, taking place on the 20th-21st of March 2025 in Amsterdam. Register now to join me and discuss the latest developments with leading experts in the field: www.ccg2025.eu #CCG2025
December 9, 2024 at 9:31 AM
Looking forward to speaking at the Clinical Cancer Genomics conference on March 20-21, 2025 in Amsterdam. Very nice and inspiring program with many European heavyweights, inc Edwin & many others. Register via the link below!👇
I'm pleased to share that I will be speaking at the Clinical Cancer Genomics meeting, taking place on the 20th-21st of March 2025 in Amsterdam. Register now to join me and discuss the latest developments with leading experts in the field: www.ccg2025.eu #CCG2025
December 9, 2024 at 8:16 AM
Prenatal cfDNA Sequencing and Incidental Detection of Maternal Cancer | New England Journal of Medicine www.nejm.org/doi/full/10....
Prenatal cfDNA Sequencing and Incidental Detection of Maternal Cancer | NEJM
Cell-free DNA (cfDNA) sequence analysis to screen for fetal aneuploidy can incidentally detect maternal cancer. Additional data are needed to identify DNA-sequencing patterns and other biomarkers t...
www.nejm.org
December 9, 2024 at 12:00 AM
Some cool novel concepts:

Nat biotech: platelets for targeted degrader delivery www.nature.com/articles/s41...

Science: T cells for targeted drug delivery
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
Engineered platelets as targeted protein degraders and application to breast cancer models - Nature Biotechnology
Protein degradation is targeted to disease sites using engineered platelets.
www.nature.com
December 6, 2024 at 6:30 AM
Beautiful study by Jacco van Rheenen, Colinda Scheele & team about the impact of the menstrual cycle on neoadjuvant chemotherapy in young women with breast cancer. Cutting-edge fundamental science with direct implications for women and families @nkinl.bsky.social

www.nature.com/articles/s41...
The oestrous cycle stage affects mammary tumour sensitivity to chemotherapy - Nature
In three mouse models of breast cancer, we show reduced responses to neoadjuvant chemotherapy when treatment is initiated during the dioestrus stage, when compared with initiation during the oestrus s...
www.nature.com
December 5, 2024 at 6:50 AM