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Registrar in Paediatrics (Astrid Lindgren's Children Hospital, Karolinska University Hospital)

Assistant Professor

Nikolas Herold

Lektor, biträdande

Registrar in Paediatrics (Astrid Lindgren's Children Hospital, Karolinska University Hospital)

Assistant Professor

Institution och organisatorisk tillhörighet:

Om mig

Before Sidney Farber introduced chemotherapy to treat childhood cancer at the end of the 1940s, paediatric cancers have been – with the exception of a small subset of patients that could be cured by radical surgery only – considered universally lethal, and any treatment had been considered unethical experiments prolonging the patients’ suffering. However, empirical combinations of several cytotoxic drugs have led to an overall cure rate of childhood cancer of 85%. Nevertheless, 15% of paediatric cancer patients still succumb to their disease despite heavy combination therapies, and the death toll for adult cancer patients (e.g. 70% for acute myeloid leukaemia in adults vs less than 30% in children) is far higher. As of today, one understands surprisingly little about how combined drugs exert their synergistic effects on a cellular and molecular level. My research sets out to understand why certain combinations of chemotherapies work for some, but not all patients with the same diagnosis. The overarching hypothesis that drives my research is that genetic factors exist that determine the extent of cellular and clinical drug synergy of two or more drugs (combination chemotherapy). Identification of these factors will not only allow to establish predictive biomarkers for combination chemotherapies, but also constitute the starting point for the development of drugs targeting cellular factors that block synergy of combination treatments. Alternatively, existing drugs might be combined in a different schedule that circumvents these cellular factors. 


Aetiology of Langerhans Cell Histiocytosis (LCH)

Translational Paediatric Oncology


Nucleotide metabolism

HIV infection and inflammation


Publikationer (urval)

Ribonucleotide reductase inhibitors suppress SAMHD1 ara-CTPase activity enhancing cytarabine efficacy. Rudd SG, Tsesmetzis N, Sanjiv K, Paulin CB, Sandhow L, Kutzner J, et al EMBO Mol Med 2020 Jan;():e10419

Evidence for SAMHD1 Tumor Suppressor Functions in Acute Myeloid Leukemia. Schaller T, Herold N Acta Haematol. 2019 Jul;():1-2

Overexpression of the Interferon-Inducible Isoform 4 of NCOA7 Dissects the Entry Route of Enveloped Viruses and Demonstrates that HIV Enters Cells via Fusion at the Plasma Membrane. Herold N Viruses 2019 01;11(2):

Low-level expression of SAMHD1 in acute myeloid leukemia (AML) blasts correlates with improved outcome upon consolidation chemotherapy with high-dose cytarabine-based regimens. Rassidakis GZ, Herold N, Myrberg IH, Tsesmetzis N, Rudd SG, Henter JI, et al Blood Cancer J 2018 10;8(11):98

Nucleobase and Nucleoside Analogues: Resistance and Re-Sensitisation at the Level of Pharmacokinetics, Pharmacodynamics and Metabolism. Tsesmetzis N, Paulin CBJ, Rudd SG, Herold N Cancers (Basel) 2018 Jul;10(7):

Effects of Inner Nuclear Membrane Proteins SUN1/UNC-84A and SUN2/UNC-84B on the Early Steps of HIV-1 Infection. Schaller T, Bulli L, Pollpeter D, Betancor G, Kutzner J, Apolonia L, et al J. Virol. 2017 10;91(19):

With me or against me: Tumor suppressor and drug resistance activities of SAMHD1. Herold N, Rudd SG, Sanjiv K, Kutzner J, Myrberg IH, Paulin CBJ, et al Exp. Hematol. 2017 08;52():32-39

SAMHD1 protects cancer cells from various nucleoside-based antimetabolites. Herold N, Rudd SG, Sanjiv K, Kutzner J, Bladh J, Paulin CBJ, et al Cell Cycle 2017 Jun;16(11):1029-1038

Improved Local Control by Extensive Surgery in High-Risk Neuroblastoma May Be Dependent on Adjuvant Radiotherapy. Stenman J, Herold N, Svensson PJ, Kogner P J. Clin. Oncol. 2017 06;35(17):1965-1966

SAMHD1 is a barrier to antimetabolite-based cancer therapies. Rudd SG, Schaller T, Herold N Mol Cell Oncol 2017 ;4(2):e1287554

Targeting SAMHD1 with the Vpx protein to improve cytarabine therapy for hematological malignancies. Herold N, Rudd SG, Ljungblad L, Sanjiv K, Myrberg IH, Paulin CB, et al Nat. Med. 2017 Feb;23(2):256-263

Complex Interplay between HIV-1 Capsid and MX2-Independent Alpha Interferon-Induced Antiviral Factors. Bulli L, Apolonia L, Kutzner J, Pollpeter D, Goujon C, Herold N, et al J. Virol. 2016 08;90(16):7469-7480

The Early Bird Catches the Worm--Can Evolution Teach us Lessons in Fighting HIV? Schaller T, Herold N Curr. HIV Res. 2016 ;14(3):183-210

HIV-1 entry in SupT1-R5, CEM-ss, and primary CD4+ T cells occurs at the plasma membrane and does not require endocytosis. Herold N, Anders-Ößwein M, Glass B, Eckhardt M, Müller B, Kräusslich HG J. Virol. 2014 Dec;88(24):13956-70

Pedagogiska meriter

Main supervisor PhD (Nikolaos Tsesmetzis)

Co-supervisor PhD (Hajar Ali Mohammed Ba Omar, Fredrik Sundquist)

Main supervisor Medical Degree Project (Aliyya Haciyeva, Julia Bladh)

PhD course organiser Translational Paediatric Oncology in the Era of Immunotherapy and Omics (




Medical degree (Heidelberg, Germany, 2012)

Medical license (Sweden), 2015

Doctoral degree (Heidelberg, Germany), 2015

Akademiska priser och utmärkelser

Tranlational prize of the Swedish Medical Association (

NOPHO-prize 2016, Stockholm, Sweden

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