Arjan Diepstra
dr.
As a hematopathologist, I work on diagnostics of all types of hematological malignancies using a comprehensive panel of different techniques. Moreover, my main research interest involves Hodgkin lymphoma, with a strong focus on interactions between tumor cells and the microenvironment. In addition, I also have a long standing interest in genetic susceptibility. My areas of expertise are: immunology, tumor cell biology, genetic association studies and molecular diagnostics in pathology. I actively participate in international (EORTC) and national (HOVON) clinical trials.
Latest publications
(215)
Activities
(38)
Press/Media
(6)
Prizes
(4)
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(1)
Supervised work
(11)
Interobserver variation in CD30 immunohistochemistry interpretation; consequences for patient selection for targeted treatment
Published in: Histopathology
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10.1111/his.13647
document
AimsCD30 immunohistochemistry (IHC) in malignant lymphoma is used for selection of patients in clinical trials using brentuximab vedotin, an antibody drug-conjugate targeting the CD30 molecule. For reliable implementation in daily practice and meaningful selection of patients for clinical trials, information on technical variation and interobserver reproducibility of CD30 immunohistochemistry (IHC) staining is required. Methods and resultsWe conducted a three-round reproducibility assessment of CD30 scoring for categorised frequency and intensity, including a technical validation, a live polling’ pre- and post-instruction scoring round and a web-based round including individual scoring...
Lianne Koens, Peter M. van de Ven, Nathalie J. Hijmering, Marie J. Kersten, Arjan Diepstra, Martine Chamuleau, Daphne de Jong
The Microenvironment in Epstein-Barr Virus-Associated Malignancies
Published in: Pathogens
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10.3390/pathogens7020040
document
The Epstein-Barr virus (EBV) can cause a wide variety of cancers upon infection of different cell types and induces a highly variable composition of the tumor microenvironment (TME). This TME consists of both innate and adaptive immune cells and is not merely an aspecific reaction to the tumor cells. In fact, latent EBV-infected tumor cells utilize several specific mechanisms to form and shape the TME to their own benefit. These mechanisms have been studied largely in the context of EBV+ Hodgkin lymphoma, undifferentiated nasopharyngeal carcinoma, and EBV+ gastric...
High prevalence of MYD88 and CD79B mutations in intravascular large B-cell lymphoma
Published in: Blood
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10.1182/blood-2017-12-822817
document
Anne M R Schrader, Patty M Jansen, Rein Willemze, Maarten H Vermeer, Anne-Marie Cleton-Jansen, Sebastiaan F Somers, J H Hendrik Veelken, Ronald van Eijk, Willem Kraan, Marie José Kersten, Michiel van den Brand, Wendy B C Stevens, Daphne de Jong, Myrurgia Abdul Hamid, Bea C Tanis, Eduardus F M Posthuma, Marcel Nijland, Arjan Diepstra, Steven T Pals, Arjen H G ClevenJoost S P Vermaat
Somatic IL4R Mutations in Primary Mediastinal Large B-cell lymphoma lead to constitutive JAK-STAT signaling activation
Published in: Blood
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10.1182/blood-2017-09-808907
document
Primary mediastinal large B cell lymphoma (PMBCL) is a distinct subtype of diffuse large B cell lymphoma thought to arise from thymic medullary B cells. Gene mutations underlying the molecular pathogenesis of the disease are incompletely characterized. Here, we describe novel somaticIL4Rmutations in 15 out of 62 primary cases of PMBCL (24.2%) and in all PMBCL-derived cell lines tested. The majority of mutations (11/21; 52%) were hotspot single nucleotide variants in exon 8 leading to an I242N amino acid change in the transmembrane domain. Functional analyses establish this...
Elena Viganò, Jay Gunawardana, Anja Mottok, Tessa Van Tol, Katina Mak, Fong Chun Chan, Lauren Chong, Elizabeth Chavez, Bruce Woolcock, Katsuyoshi Takata, David Twa, Hennady P Shulha, Adèle Telenius, Olga Kutovaya, Stacy S Hung, Shannon Healy, Susana Ben-Neriah, Karen Leroy, Philippe Gaulard, Arjan DiepstraRobert Kridel, Kerry J Savage, Lisa Rimsza, Randy Gascoyne, Christian Steidl
Combined PD-1 and JAK1/2 inhibition in refractory primary mediastinal B-cell lymphoma
Published in: Annals of Hematology
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10.1007/s00277-018-3233-9
document
Marcel Nijland, Tom van Meerten, Annika Seitz, Gerwin Huls, Robby Kibbelaar, Lydia Visser, Anke van den Berg, Arjan Diepstra