Research Groups

IMMENs builds on the complementary expertise of four PIs in lymphatic biology (Mäkinen), leukocyte guidance (Vaahtomeri), cellular crosstalk and organ-on-chip technologies (Sahlgren), and cell adhesion, advanced imaging, and image analysis of cell migration (Jacquemet), supported by dedicated collaborators and medical experts in immunology and cancer.
Taija Mäkinen

Taija Mäkinen obtained her Ph.D. from the University of Helsinki and completed postdoctoral training at the Max Planck Institute of Neurobiology in Martinsried, Germany. She established her research group at the Cancer Research UK London Research Institute (now the Francis Crick Institute) before moving to Uppsala University, where she served as a professor. She was recruited back to Finland in 2024 and currently leads the  Laboratory, serves as a principal investigator in the Translational Cancer Medicine Research Program at the Faculty of Medicine, University of Helsinki, and is the Director of the .

Research interests:

We investigate the fundamental mechanisms that govern vascular development, maintenance, and regeneration, and how vascular and lymphatic networks contribute to organ-specific physiology and disease. Using advanced genetic mouse models, imaging technologies, and bioinformatic approaches, we aim to uncover previously unrecognised vascular functions and define how their dysregulation drives pathology.  In particular, our work focuses on the expanding roles of the lymphatic vasculature beyond fluid drainage, including lymphatic endothelial cell–mediated modulation of immune responses and the secretion of ‘lymphangiocrine’ factors that regulate organ growth and regeneration. These emerging insights reveal the importance of lymphatic vessels in diverse physiological processes and diseases, and provide opportunities to develop novel therapeutic strategies.

Recent selected publications

Kraft M, Schoofs H, Petkova M, Andrade J, Grosso AR, Benedito R, De Roo AK, Boon LM, Vikkula M, Kapp FG, Hägerling R, Potente M, Mäkinen T. Angiopoietin-TIE2 feedforward circuit promotes PIK3CA-driven venous malformations. Nat Cardiovasc Res. 2025 Jul;4(7):801-820. doi:

Schoofs H, Daubel N, Schnabellehner S, Grönloh MLB, Palacios Martínez S, Halme A, Marks AM, Jeansson M, Barcos S, Brakebusch C, Benedito R, Engelhardt B, Vestweber D, Gaengel K, Linsenmeier F, Schürmann S, Saharinen P, van Buul JD, Friedrich O, Smith RS, Majda M, Mäkinen T. Dynamic cytoskeletal regulation of cell shape supports resilience of lymphatic endothelium. Nature. 2025 May;641(8062):465-475. doi:

Petkova M, Kraft M, Stritt S, Martinez-Corral I, Ortsäter H, Vanlandewijck M, Jakic B, Baselga E, Castillo SD, Graupera M, Betsholtz C, Mäkinen T. Immune-interacting lymphatic endothelial subtype at capillary terminals drives lymphatic malformation. J Exp Med. 2023 Apr 3;220(4):e20220741. doi:.

Hernández Vásquez MN, Ulvmar MH, González-Loyola A, Kritikos I, Sun Y, He L, Halin C, Petrova TV, Mäkinen T. Transcription factor FOXP2 is a flow-induced regulator of collecting lymphatic vessels. EMBO J. 2021 Jun 15;40(12):e107192. doi:

Martinez-Corral I, Zhang Y, Petkova M, Ortsäter H, Sjöberg S, Castillo SD, Brouillard P, Libbrecht L, Saur D, Graupera M, Alitalo K, Boon L, Vikkula M, Mäkinen T. Blockade of VEGF-C signaling inhibits lymphatic malformations driven by oncogenic PIK3CA mutation. Nat Commun. 2020 Jun 8;11(1):2869. doi:.

Kari Vaahtomeri

Kari Vaahtomeri obtained his Ph.D. from the University of Helsinki and continued studies on cell interactions during his postdoctoral training in the lab of Prof. Michael Sixt at IST Austria. He heads the  and serves as a principal investigator in the Translational Cancer Medicine Research Program at the Faculty of Medicine, University of Helsinki, and Wihuri Research Institute. 

Research interests:

We are intrigued by one of the most complex biological events: how migrating cells reach their correct destination to interact with effector cells at the right time, i.e., how guidance cues are generated and interpreted. To investigate this fundamental question, we utilize lymphatics and the associated immune cells as a model system and have established a research platform that combines a multitude of microscopy approaches and innovative primary cell culture, explant, and in vivo cell migration models. To complement our strengths, we collaborate with scientists whose expertise ranges from immunology to biophysics. The chosen approach allows a multi-scale view of complex biological systems, such as lymphatics and adaptive immunity.

Recent selected publications

Liaqat I, Hilska I, Saario M, Jakobsson E, Crivaro M, Peränen J, Vaahtomeri K. Spatially targeted chemokine exocytosis guides transmigration at lymphatic endothelial multicellular junctions. The EMBO J., 2024. doi: .

Uçar MC, Hannezo E, Tiilikainen E, Liaqat I, Jakobsson E, Nurmi H, Vaahtomeri K. Self-organized and directed branching results in optimal coverage in developing dermal lymphatic network. Nature Communications, 2023. doi: .

Vaahtomeri K, Moussion C, Hauschild R, Sixt M. Shape and function of interstitial chemokine CCL21 gradients are independent of Heparan sulfates produced by lymphatic endothelium. Frontiers in Immunology, 2021. doi:

Cecilia Sahlgren

Cecilia Sahlgren earned her Ph.D. from Åbo Akademi University and completed postdoctoral training at the Karolinska Institute in Stockholm, Sweden. She established her research group at the Turku Bioscience Center before moving to Eindhoven University of Technology, where she became a full professor. She was recruited back to Finland in 2017 and currently leads the CellFate lab at Åbo Akademi University. She also holds a part-time (0.2 FTE) professorship at Eindhoven University of Technology in the Department of Biomedical Engineering.

Research interests:

combines cell biology, engineering, and computational biology to uncover fundamental mechanisms that drive cell fate decisions. We recreate cellular niches in vitro to investigate how the physical, cellular, and mechanical microenvironment influences cell fate decisions in tissue development, regeneration, and disease. Our recent work focuses on how mechanical cues from blood flow and the extracellular matrix integrate with cell signaling to regulate the form and function of the cardiovascular system. Along with collaborators, we use this knowledge to develop material-based medical technologies to control these mechanisms for regenerative therapies.

Recent selected publications

Sanlidag S, Virtanen N, Hoursan H, Ristori T, Sjöqvist M, Loerakker S, Sahlgren C. Receptor-stoichiometry predicts arterytypical vulnerability to altered Notch signaling during smooth muscle differentiation. bioRxiv 2025. doi: 10.1101/2025.05.05.652186

Stassen OMJ, Virtanen N, Lin K, Suarez Rodriguez F, Heijmans MJM, Zhao F, Corthals GL, Bouten CVC, Sahlgren C. Mechanosensitive interactions between Jag1 and Myo1c control Jag1 trafficking in endothelial cells. iScience. 2025. doi: 

Grolleman J, Bouten CVC, Conte V, Sahlgren CM. An integrated 2D framework for quantifying cellular mechanics reveals the impact of juxtacrine Notch signalling on directed collective migration of endothelial cells. BMC Biology. 2025. doi: 

Suarez Rodriguez F, Virtanen N, Kiviluoto E, Driessen RCH, Zhao F, Bouten CVC, Stassen OMJ, Sahlgren C. A non-canonical role for Jagged1 in endothelial mechanotransduction. bioRxiv  2025. doi: 

Grolleman J, Pijnenburg IMT, Bouten CVC, Conte V, Sahlgren CM. 2.5D Model for Ex Vivo Mechanical Characterization of Sprouting Angiogenesis in Living Tissue. JoVE. 2025. doi: 

Guillaume Jacquemet

Guillaume Jacquemet earned his PhD from the University of Manchester, UK, and completed postdoctoral training at the University of Turku, Finland. He is now an Associate Professor at Åbo Akademi University. Guillaume Jacquemet leads the Cell Migration Laboratory.

Research interests:

at Åbo Akademi University researches how cancer and immune cells move and interact with their environment, especially blood vessels, during metastasis. We use advanced live-cell microscopy, microfluidic systems that simulate blood flow, and AI-driven image analysis to observe cells in action and understand how they adhere, squeeze, and travel through tissues. Along with our biological studies, we create open-source software tools that help scientists worldwide analyze complex imaging data. These methods aim to reveal how cell movement influences disease and to identify new opportunities for diagnosis and treatment.

Recent selected publications

Follain G, Ghimire S, Pylvänäinen JW, Vaitkevičiūtė M, Wurzinger D, Guzmán C, Conway JRW, Dibus M, Oikari S, Rilla K, Salmi M, Ivaska J, Jacquemet G. Fast label-free live imaging reveals key roles of flow dynamics and CD44-HA interaction in cancer cell arrest on endothelial monolayers. bioRxiv 2024.09.30.615654.

Gómez-de-Mariscal E, Grobe H, Pylvänäinen JW, Xénard L, Henriques R, Tinevez JY, Jacquemet G.  CellTracksColab is a platform that enables compilation, analysis, and exploration of cell tracking data. PLOS Biology. 22, e3002740. 2024. doi: 

Ball N, Ghimire S, Follain G, Pajari A, Vaitkevičiūtė M, Cowell A, Berki B, Ivaska J, Paatero I, Goult BT, Jacquemet G. TLNRD1 is a CCM complex component and regulates endothelial barrier integrity. Journal of Cell Biology. 223. 2024. doi:  

Hidalgo-Cenalmor I, Pylvänäinen JW, Ferreira M, Russell G, Saguy A, Arganda-Carreras I, Shechtman Y, AI4Life Consortium, Jacquemet G, Henriques R, Gómez-de-Mariscal E. DL4MicEverywhere: deep learning for microscopy made flexible, shareable and reproducible. Nature Methods. 21, 925–927. 2024. doi:  

Peuhu E*, Jacquemet G*, Scheele CLGJ, Isomursu A, Laisne MC, Koskinen LM, Paatero I, Thol K, Georgiadou M, Guzmán C, Koskinen S, Laiho A, Elo LL, Boström P, Hartiala P, van Rheenen J, and Ivaska J. MYO10-filopodia support basement membranes at pre-invasive tumor boundaries. Developmental Cell. 57, 2350–2364. 2022. doi: