Genetically Modified Cows Increase Human Insulin Production by 10x - Study

A recent study has demonstrated that genetically modified cows can potentially increase insulin production, presenting a new avenue for addressing insulin scarcity and reducing treatment costs for diabetes patients worldwide.

Insulin Production from Transgenic Cows

Led by researchers from the University of Illinois Urbana-Champaign and the Universidade de São Paulo, this development provides insights into novel methods for insulin production.

Diabetes, a chronic condition characterized by inadequate insulin production or ineffective use of insulin, affects millions globally. While some individuals can manage the condition through lifestyle changes or oral medication, others, particularly type 1 diabetics, rely on injectable insulin to survive.

However, access to insulin remains a challenge for many, with cost and availability issues prevalent, especially in low- and middle-income countries.

The study showcases the development of a transgenic cow capable of producing human insulin in its milk. Matt Wheeler, a professor at the Department of Animal Sciences at the University of Illinois Urbana-Champaign, highlights the significance of leveraging the mammary gland's innate protein production capabilities to address insulin shortages.

The genetically modified cow, engineered to express human proinsulin specifically in mammary tissue, demonstrates the feasibility of harnessing nature's efficiency to produce vital medical proteins.

Inserting Human DNA Proinsulin into Cow Embryos

The process involved the insertion of human DNA encoding proinsulin into cow embryos, followed by implantation into surrogate cows. While the initial lactation yielded a smaller quantity of milk than anticipated, both proinsulin and insulin were detected - a testament to the cow's remarkable ability to process the protein.

Despite the challenges encountered, researchers remain optimistic about the potential for future generations of transgenic cows to produce insulin more efficiently.

"In the old days, we used to just slam DNA in and hope it got expressed where you wanted it to," Wheeler said in a statement.

"We can be much more strategic and targeted these days. Using a DNA construct specific to mammary tissue means there's no human insulin circulating in the cow's blood or other tissues. It also takes advantage of the mammary gland's capabilities for producing large quantities of protein."

Looking ahead, the team envisions the establishment of purpose-built herds comprising transgenic cows and bulls, capable of meeting global insulin demands.

With the right infrastructure and regulatory approvals in place, transgenic cows could emerge as a viable alternative to existing insulin production methods, offering scalability and cost-effectiveness.

Wheeler envisions a future where even a modest-sized herd could produce enough insulin to meet national demands, while larger herds could supply the world's needs within a year.

While the prospect of transgenic cows revolutionizing insulin production holds promise, significant challenges lie ahead. Scaling up production, ensuring product safety and purity, and obtaining regulatory approvals are critical steps that must be addressed before transgenic insulin becomes widely available.

"Our goal was to make proinsulin, purify it out to insulin, and go from there. But the cow basically processed it herself. She makes about three to one biologically active insulin to proinsulin," Wheeler said. "The mammary gland is a magical thing."

The findings of the study were published in the Biotechnology Journal.