Lisa Westerberg Group

The overall goal of our research is to increase the understanding of actin regulators in immune cells and their role in immunodeficiency diseases. We expect to reveal critical mechanisms for maintenance of a correctly regulated immune system in health and disease and identify new targets for therapy.

Lisa Westerberg Group 2020
Lisa Westerberg Group

Understanding the Immune system by studying Immunodeficiency Diseases

The immune system is never at rest. Our immune cells constantly remodel their actin cytoskeleton to migrate into tissues to kill pathogens and cancer cells or to communicate with other immune cells via cell-to-cell interaction. My group is investigating how inborn errors in actin dynamics leads to development of severe immunodeficiency disease, autoimmunity, and cancer.

Neutrophils by scanning electron microscopy
Neutrophils by scanning electron microscopy

We investigate primary immunodeficiency to understand the immune system and with the long-term goal to identify new treatments for these diseases. Primary immunodeficiencies are diseases in which part of the body's immune system is missing or does not function properly. Most primary immunodeficiencies are genetic disorders and the majority are diagnosed in children under the age of one. Translational studies of primary immunodeficiency diseases in patients and gene-targeted experimental models have increased our understanding of the cause for disease and led to development of new therapeutic approaches, including bone marrow transplantation and gene therapy. Understanding primary immunodeficiency diseases has also increased our knowledge of critical mechanisms for correct function of the immune system.

Germinal center (pink-yellow) in B cell follicles (blue) in the spleen
Germinal center (pink-yellow) in B cell follicles (blue) in the spleen

We have focused on the evolutionary conserved WASp family of actin regulators and their interacting partners. WASp is uniquely expressed in hematopoietic lineage cells and is mutated in two severe immunodeficiency diseases. Wiskott-Aldrich syndrome is caused by loss-of-function mutations in WASp and patients suffer from life-threating infections and are at risk to develop autoimmunity and cancer. In contrast to WAS, X-linked neutropenia (XLN) is caused by gain-of-function mutations predicted to lead to a constitutively-active WASp. XLN patients suffer from severe congenital neutropenia and are at risk to develop malignancies. Recent data from our group challenges the view that WASp deficiency leads to hypo-responsive immune cells. Instead, our data suggests that WASp-associated immunodeficiency leads to a breach in tolerance by activation of the ‘wrong’ cells at incorrect sites.

High resolution images for F-actin (blue) in B cells
High resolution images for F-actin (blue) in B cells

Our working hypothesis based on our published and preliminary data is that small changes in intracellular signaling leading to actin dynamics may have large impact on immune cell homeostasis and the immune response. To address this hypothesis, we combine analysis of experimental models and rare patient samples obtained from national and international collaborators. The overall goal of our research is to increase the understanding of actin regulators and their role in hematopoietic cells, both in the cytoplasm and in the nucleus. We expect to reveal critical mechanisms for maintenance of a correctly regulated immune system in health and disease and to identity new treatment strategies for immunodeficiency and hematological malignancies.

Group Leader

Lisa Westerberg graduated from Stockholm University with a M.Sc. in Molecular Biology and received her Ph.D. in Cell and Molecular Biology in 2003 from Karolinska Institutet where she studied under Professor Eva Severinson. In 2009 she completed her postdoctoral research at Harvard Medical School in the laboratories of Professors Scott Snapper and Luigi Notarangelo.

Lisa Westerberg

She joined the faculty at Department of Medicine at Karolinska Institutet, Stockholm in 2009 after receiving an Assistant Professor position appointed by the Swedish Research Council. In 2013, Dr Westerberg joined the faculty at the Department of Microbiology Tumor and Cell biology as Associate Professor. Dr Westerberg is the treasurer of the Swedish Society for Immunology and coordinates the WASPSTINGS network funded by STINT. Dr Westerberg is a Ragnar Söderberg fellow in Medicine and holds a senior researcher position from the Childhood Cancer fund.

Group Members

PhD students (Co-Supervisor)

Giovanna Perinetti Casoni, PhD student, Karolinska Institutet (main supervisor: Yenan Bryceson)

Shan Wang, MSc, PhD student, Karolinska Institutet (main supervisor: Mikael Karlsson)



Marton Keszei, PhD, 2013-2019

Hanna Brauner, MD PhD, 2016-2018

Sven Petersen, PhD, 2011-2012

PhD students

Anton Sendel, MD PhD, 2014-2020

Joanna Kritikou, PhD, 2012-2017

Carin Dahlberg, PhD, 2010-2015

Marisa Baptista, PhD, 2009-2014

Visiting scientists

Romulo Galvani, PhD, Fiocruz, Brazil 2019-2020

Liu Jing, MD, CSC visiting scholar, Ningxia Medical University, China 2019-2020

Larissa Vasconcelos Fontes, MSc, PhD student, Fiocruz, Brazil 2018-2019

Master and Undergraduate students

Shin-Yu (Timas) Kung, Master student 2020

Anna Angelopoulou, Master student 2020

Chiara Geyer, Erasmus student 2017 and Master student 2019

Christoph Haase, Erasmus student 2019

Mathias Percipalle, Internship 2019

Tijana Nikic, Amgen scholar student 2019

Meike Thiemann, Bachelor student 2018

Alva Casey, Amgen scholar student 2018

Lena Bohaumilitzky, Erasmus student 2017

Stamatina Rentouli, Erasmus student 2016-2017

Elena Griseti, Master student 2017

Alexander Schäffer, Master student 2017

Deborah Sandfort, Bachelor student 2016-2017

Hannah Wurzer, Master student 2016

Marissa Franke, Euroscholar student 2016

Laura Köcher, student 2015-2016

Pei Yee Tey, Amgen Scholar student 2016

Jaime James, Master student and Research assistant 2014-2016

Paul Drescher, Bachelor student 2014-2015

Wenqing Yan, Amgen scholar student 2015

Yi Fei Lee, Amgen scholar student 2015

Bettina Mwale, Amgen Scholar student 2014

Katharina Koch, student 2012

Lucy Garner, Amgen Scholar student 2012

Bisera Stepanovska, Amgen Scholar student 2012

Rhea Chatterjea, Amgen Scholar student 2011

Chiao Yin Lim, Amgen Scholar student 2011

Katherine Oliver, Amgen Scholar student 2010


  • Harvard Medical School, USA: Dr. Scott Snapper
  • New York University Abu Dhabi: Dr Piergiorgio Percipalle
  • Fiocruz Institute, Brazil: Dr. Vinicius Cotta-de-Almeida
  • National Institute of Health, USA: Dr. Luigi Notarangelo
  • University of South Florida, USA: Dr. Jolan Walter
  • Baylor College of Medicine, USA: Dr. Jordan Orange
  • University of Maryland, USA: Dr. Wenxia Song
  • University College London, UK: Drs. Adrian Thrasher and Siobhan Burns
  • Leuven University Hospital, Belgium: Dr. Peter Vandenberghe
  • Center for Pediatric Hematology, Oncology, Immunology, Russia: Dr. Anna Shcherbina
  • University of Milan, Italy: Dr. Anna Villa
  • Curie Institute, France: Dr. Ana-Maria Lennon Dumenil
  • Huazhong University of Science and Technology, China: Dr. Chaohong Liu
  • Chongqing Medical University, China: Dr. Xiaodong Zhao
  • Umeå University, Sweden: Dr Mattias Forsell
  • Stockholm University, Sweden: Dr. Eva Severinson
  • Karolinska Institutet, Sweden: Drs. Mikael Karlsson, John Andersson, Magnus Björkholm, Liv Eidsmo, Susanne Nylén, Fredrik Wermeling, Klas Kärre, Hans-Erik Claesson, Lena Ström, Evren Alici, Robert Månsson, and Ola Winqvist

For Science and Education

Our group is also actively involved in medical education and our research is featured on several external research websites.

Ragnar Söderberg blogg and Movie:

Interview about mentorship at the Amgen scholar website:

Press releases:

Book Chapter:

Two sides of the coin: Cytoskeletal regulation of immune synapses in cancer and primary immune deficiencies.
Saeed MB, Record J, Westerberg LS
International Review of Cell and Molecular Biology. Volume 356, 2020, Pages 1-97


Joint Brazilian - Swedish Research Collaboration CAPES – STINT network grant with Dr. Vinicius Cotta-de-Almeida, Fiocruz Institute, Brazil

Swedish Research Council and the National Natural Science Foundation of China (NSFC) network grant with Dr. Chaohong Liu, Huazhong University of Science and Technology, China.

Selected publications

Constitutive WASp activation leads to abnormal cytotoxic cells with increased response against tumors.
Kritikou JS, Oliveira MM, Record J, Saeed MB, Nigam SM, He M, Keszei M, Wagner AK, Brauner H, Sendel A, Sedimbi SK, Rentouli S, Lane DP, Snapper SB, Kärre K, Vandenberghe P, Orange JS, Westerberg LS
JCI Insight 2021 Feb;():

An intronic deletion in megakaryoblastic leukemia 1 is associated with hyperproliferation of B cells in triplets with Hodgkin lymphoma.
Record J, Sendel A, Kritikou JS, Kuznetsov NV, Brauner H, He M, Nagy N, Oliveira MMS, Griseti E, Haase CB, Dahlström J, Boddul S, Wermeling F, Thrasher AJ, Liu C, Andersson J, Claesson HE, Winqvist O, Burns SO, Björkholm M, Westerberg LS
Haematologica 2020 05;105(5):1339-1350

Wiskott-Aldrich syndrome gene mutations modulate cancer susceptibility in the p53± murine model.
Keszei M, Kritikou JS, Sandfort D, He M, Oliveira MMS, Wurzer H, Kuiper RV, Westerberg LS
Oncoimmunology ;7(9):e1468954

Constitutive activation of WASp in X-linked neutropenia renders neutrophils hyperactive.
Keszei M, Record J, Kritikou JS, Wurzer H, Geyer C, Thiemann M, Drescher P, Brauner H, Köcher L, James J, He M, Baptista MA, Dahlberg CI, Biswas A, Lain S, Lane DP, Song W, Pütsep K, Vandenberghe P, Snapper SB, Westerberg LS
J Clin Invest 2018 08;128(9):4115-4131

Nuclear Wiskott-Aldrich syndrome protein co-regulates T cell factor 1-mediated transcription in T cells.
Kuznetsov NV, Almuzzaini B, Kritikou JS, Baptista MAP, Oliveira MMS, Keszei M, Snapper SB, Percipalle P, Westerberg LS
Genome Med 2017 10;9(1):91

IL-2 in the tumor microenvironment is necessary for Wiskott-Aldrich syndrome protein deficient NK cells to respond to tumors in vivo.
Kritikou JS, Dahlberg CI, Baptista MA, Wagner AK, Banerjee PP, Gwalani LA, Poli C, Panda SK, Kärre K, Kaech SM, Wermeling F, Andersson J, Orange JS, Brauner H, Westerberg LS
Sci Rep 2016 08;6():30636

Deletion of Wiskott-Aldrich syndrome protein triggers Rac2 activity and increased cross-presentation by dendritic cells.
Baptista MA, Keszei M, Oliveira M, Sunahara KK, Andersson J, Dahlberg CI, Worth AJ, Liedén A, Kuo IC, Wallin RP, Snapper SB, Eidsmo L, Scheynius A, Karlsson MC, Bouma G, Burns SO, Forsell MN, Thrasher AJ, Nylén S, Westerberg LS
Nat Commun 2016 07;7():12175

Deletion of WASp and N-WASp in B cells cripples the germinal center response and results in production of IgM autoantibodies.
Dahlberg CI, Torres ML, Petersen SH, Baptista MA, Keszei M, Volpi S, Grasset EK, Karlsson MC, Walter JE, Snapper SB, Notarangelo LD, Westerberg LS
J Autoimmun 2015 Aug;62():81-92

Wiskott-Aldrich syndrome protein (WASP) and N-WASP are critical for peripheral B-cell development and function.
Westerberg LS, Dahlberg C, Baptista M, Moran CJ, Detre C, Keszei M, Eston MA, Alt FW, Terhorst C, Notarangelo LD, Snapper SB
Blood 2012 Apr;119(17):3966-74

Activating WASP mutations associated with X-linked neutropenia result in enhanced actin polymerization, altered cytoskeletal responses, and genomic instability in lymphocytes.
Westerberg LS, Meelu P, Baptista M, Eston MA, Adamovich DA, Cotta-de-Almeida V, Seed B, Rosen MK, Vandenberghe P, Thrasher AJ, Klein C, Alt FW, Snapper SB
J Exp Med 2010 Jun;207(6):1145-52

All publications

Link to all Lisa Westerberg Publications on PubMed


Lisa Westerberg

C1 Department of Microbiology, Tumor and Cell Biology