Malaria Breakthrough: Could a New Treatment Also Lead to a Male Contraceptive?

Malaria infects approximately 250 million people annually and causes over 600,000 deaths worldwide, according to the World Health Organization. While standard antimalarial drugs clear the parasite from the blood, they do not necessarily prevent transmission via mosquitoes.

The Science Behind the Discovery

Dr. Sayers and colleagues are investigating specific proteins involved in male malaria parasite reproduction. Disrupting these proteins in the male parasite prevents proper cell development and transmission. Laboratory results show that disrupting these proteins stops reproduction in mosquitoes.

"If we disrupt these proteins in the male parasite – which effectively acts as the malaria parasite sperm – the cells can’t develop properly, so the parasite can’t be transmitted."
— Dr. Sayers

Further research in animal models and drug design is expected to take at least a decade before a treatment could be used to prevent transmission to humans. The approach could be integrated into existing oral or injectable malaria treatments to both clear infection and halt spread.

A Surprising Human Connection

The gene involved is not unique to malaria parasites; it is present in most sexually reproducing species, including humans. The human version is highly expressed in the testes, suggesting a potential role in sperm development.

Tampering with these proteins causes male Plasmodium parasites to become infertile, raising questions about similar mechanisms in infertile men. Published studies indicate that infertile men may have mutations or changes in expression of these genes.

"There are some published studies showing infertile men with mutations in these proteins or changes in the expression of these genes, so it’s not such a wild idea that there’s a link."
— Dr. Sayers

A Dual-Purpose Breakthrough?

Dr. Sayers speculates that these male sex genes could be targeted for developing a non-hormonal male contraceptive.

"I’m talking about malaria on one hand and male contraceptive pills on the other. It might sound like a strange leap to make, but the biology could be connected."
— Dr. Sayers

This research opens two distinct but biologically linked possibilities: a transmission-blocking malaria treatment and a novel approach to male contraception. Both applications would rely on the same fundamental mechanism—disrupting proteins essential for sperm development and function.