TRANslational Theranostics Group

Our Team

Thuy Tran, PhD

Associate Professor

Group Leader

I earned my PhD in Biomedical Radiation Sciences from Uppsala University in 2009 and spent a year in the industry before joining Lund University's Bioimaging Center in 2010. I established and led the centre's radiochemistry and preclinical PET/SPECT/CT platform. 

In 2016, I received my docent/readership in experimental oncology at Lund University. Later that year, I joined the Karolinska Radiopharmacy at Karolinska University Hospital, becoming the head of R&D there in 2018. In 2020, I started the TRANslational Theranostics group at the Department of Oncology and Pathology, Karolinska Institutet. In 2023, I co-founded the Theranostics Trial Center (TTC) at Karolinska, focusing on bringing radiopharmaceuticals from bench to bedside.

My research research interest focuses on developing theranostics, which are radiopharmaceuticals for both therapy (molecular radiotherapy or radionuclide therapy) and diagnostics (PET imaging). This involves identifying targets, screening drugs, developing radiolabelling methods, conducting in vitro and in vivo evaluations, and translating these into early clinical studies.

Johnathan Siikanen, PhD

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Mélodie Ferrat, PhD
Postdoctoral researcher

Dr. Ferrat received her PhD 

Klas Bratteby, PhD
Postdoctoral researcher


Dr. Bratteby recieved his MSc degree in civil engineering in biotechnology from the Faculty of engineering at Lund University in 2017. After this, he proceeded to do his Ph.D. in Matthias Herth’s research group at the University of Copenhagen, focusing on 18F-radiolabeling of base-sensitive compounds and pretargeting.

After receiving his PhD. in 2021 he worked for one year at the cyclotron unit and Lund University Hospital before joining the Tran lab at Karolinska in 2022 as a postdoc and as a R&D radiochemist at Karolinska Radiopharmacy. His current main postdoctoral project is developing TROP2-targeted theranostics.

Emma Jussing, PhD
Postdoctoral researcher


Dr. Jussing has been working as a radiopharmacist at Radiopharmacy, Karolinska University Hospital, for over 10 years.  She defended her PhD thesis in 2022, focusing on developing radiometal-based labelling techniques and tracers for non-invasive molecular imaging.

Currently, she is a qualified person (QP) at the Dept of Radiopharmacy and a postdoc at OnkPat  KI, with research interests in the automation of labelling methods using new radiometals and how these can optimize and facilitate radiopharmaceuticals manufacturing  for early clinicial trials.

Henrik Alfredéen, MSc
PhD student


Karl Pettersson Palm, MSc
PhD student

Karl began his studies in the Medical Program at Karolinska Institutet in 2019, combining studies and research. In  In 2023, he joined our group, where he focused on preclinical developments of TROP2-targeted antibody-based theranostics of solid cancers. 

His research interest lies in personalized medicine using a theranostic approach. 

Brendan Ng, MSc
PhD student

Brendan majored in Biological Sciences from Nanyang Technological University (NTU), Singapore 2023.  He was accepted during the fall 2023 as a PhD student in the joint PhD program KI-NTU. 

His current research interests focus on the therapeutic and diagnostic benefits of peptide-based radiopharmaceuticals in oncology, He will utilize and optimize site-specific conjugation methods using peptide ligases for the development of next-generation radiopharmaceuticals. The project is a close collaboration with Prof Chuan Fa’s lab at NTU. 

Samar Omer, MSc
Research assistant

Samar received her bachelor of Pharmacy from the University of Medical Sciences and Technology, Khartoum Sudan in 2015. After working within the industries including as a product manager, analyst and regulatory affairs pharmacist in Sudan between 2015-2020, she  returned to the university. She obtained her MSc witthin Drug discovery and development from Uppsala University, Sweden. 

Currently, she  is a research assistant with a focus on developing radiolabelling methodologies, carrying out stabilities studies, in vitro and in vivo studies in several projects.