Keele scientists map genetic switches on mosquito reproductive genes, advancing tools to fight disease
Scientists at Keele University have created the first detailed map of the genetic “switches” that control reproduction in disease-carrying insects such as Anopheles gambiae, the mosquito species most responsible for malaria transmission, paving the way for more effective methods of genetically controlling these insects.
The study, now published in Communications Biology, provides a crucial resource for developing more precise genetic tools to curb mosquito‑borne diseases like malaria and Dengue.
The team focused on cis‑regulatory elements (CREs) - short DNA sequences that determine when and where genes are switched on. These elements are central to processes such as germline development and sex differentiation, making them critical components for technologies like gene drives, which bias inheritance of certain genes to suppress or modify mosquito populations; for example, by ensuring mosquito populations can only produce male offspring.
Despite their importance, CREs in mosquitoes have remained poorly understood due to limited computational tools and the difficulty in validating regulatory sequences experimentally. To overcome this, the Keele‑led team developed a systematic computational pipeline to identify and characterise hundreds of CREs associated with germline gene expression in both male and female mosquitoes.
Using this approach, the researchers mapped CREs across the genome and identified specific nucleotides that strongly influence mosquito germline expression. This represents the first definitive annotation of the mosquito germline regulatory landscape, offering unprecedented insight into the molecular mechanisms that underpin mosquito reproduction.
First author Emily Chesters, a PhD researcher at Keele, said: “We’ve uncovered regulatory sequences that the field has never had access to before. This map gives researchers the precision they need to design safer and more effective genetic control tools.”
The findings have direct implications for the development of genetic control strategies, including gene drives designed to reduces the number of biting, disease‑transmitting mosquitoes. Understanding CREs also enables more precise control of when and where these genetic tools are active, reducing any unintended side effects and making them safer to use.
Senior author Dr Roberto Galizi, Reader in Life Sciences at Keele, added: “By charting the regulatory architecture of the mosquito germline, we’re removing a major barrier to innovation. These insights will accelerate the development of reliable genetic technologies to help reduce the global burden of malaria.”
As genetic control technologies continue to advance, the CRE atlas produced by the Keele team will serve as a critical resource for researchers worldwide, accelerating the development of safe, effective, and scalable tools to reduce the burden of mosquito‑borne disease.
