News items New drug blocks transmission of malaria parasites
11 August 2022

A new drug that blocks the transmission of malaria parasites by mosquitoes has been tested in humans for the first time by researchers at Radboud University Medical Center. Administration to healthy volunteers appears safe and the drug in the blood of volunteers prevents malaria parasite reproduction in the mosquito. A single injection of the drug could prevent transmission of parasites, and thus new malaria cases, during an entire malaria season.

Malaria is one of the most important infectious diseases of our time, with over 200 million cases and more than 600 thousand deaths each year. Young children in Africa, with poor access to health care, are particularly at risk of malaria. The parasites that cause this disease spread from one person to another via mosquitoes. Interrupting this highly efficient route of transmission is critical to reduce the global burden of malaria. 

The new drug, an antibody called TB31F, was discovered and developed by a team of scientists in Nijmegen, the Netherlands.  Together with PATH's Malaria Vaccine Initiative, they conducted the first study with TB31F in humans. 25 healthy volunteers were administered TB31F, which proved safe and caused no important side effects. Next, researchers from the Malaria Unit of the Radboudumc determined the effect of TB31F, in the blood of the volunteers, on the transmission of parasites to mosquitoes.

Mechanism of action outside the body

In the Malaria Unit, researchers feed cultured malaria parasites to cultured mosquitoes, mimicking transmission from infected individuals to mosquitoes. Addition of the volunteers' blood containing TB31F completely blocked infection of the mosquitoes. Furthermore, the researchers estimate that one injection of TB31F may be able to prevent transmission of parasites from humans to mosquitoes for an entire malaria season in many parts of the world. When combined with other control measures, TB31F could become a valuable tool in the fight against malaria.

‘The remarkable thing is that this antibody actually works outside the human body’, explains clinical microbiologist Matthew McCall of the Radboudumc. ‘After being injected into a person, the antibody remains in the blood for several months, but it doesn't actually do anything there, not even if someone has malaria. Only when a mosquito bites and takes up blood containing both malaria parasites and the antibody, the antibody prevents the parasite from multiplying in the mosquito.  This way, the parasite cannot spread further and cannot cause more malaria cases.’

About the Publication

This study was published in The Lancet Infectious Diseases: Safety, tolerability, and Plasmodium falciparum transmission reducing activity of monoclonal antibody TB31F: a single centre, open-label, first-in-human, dose-escalation, phase 1 trial in healthy malaria-naive adults. Saskia C. van der Boor, Merel J. Smit, Stijn W. van Beek, Jordache Ramjith, Karina Teelen, Marga van de Vegte-Bolmer, Geert-Jan van Gemert, Peter Pickkers, Yimin Wu, Emily Locke, Shwu-Maan Lee, John Aponte, C. Richter King, Ashley J Birkett, Kazutoyo Miura, Morolayo A. Ayorinde, Robert W. Sauerwein, Rob ter Heine, Christian F. Ockenhouse, Teun Bousema, Matthijs M. Jore, Matthew B.B. McCall.

  • Want to know more about these subjects? Click on the buttons below for more news.


More information

Annemarie Eek


+31 611091018
send an email

Related news items

Immune cell becomes tumor cell by a molecular switch to higher lipid uptake Protein CD37 plays an important role in the development and prognosis of B-cell lymphoma

19 September 2022

When B cells of the immune system no longer have the protein CD37 on their surface, they can change into tumor cells that form blood cancer. CD37 inhibits fat uptake in B cells. If this protein is missing, a tumor cell absorbs much more fat and therefore grows faster. 

read more

What can we learn from rural Tanzanian food?

23 December 2021 What we eat affects our bodies. A diet high in plant based products and low in fat offers health benefits and prevents lifestyle diseases, such as cardiovascular disease. This is what Quirijn de Mast shows based on his research in Africa. read more

Radboudumc receives 2.6 million Euro from KWF for cancer research

22 December 2021 The Dutch Cancer Society (KWF) is awarding funds with a total of more than 2.6 million euros to five new research projects. The awards are part of the latest round of funding from KWF, in which almost 27 million euros is being allocated to Dutch cancer research. The projects will start in mid-2022. read more