The discovery of a genetic tweak that could revolutionize treatment for diabetes is being hailed as a significant step forward. Typically, pancreatic cells, which produce insulin, are either absent or dysfunctional, posing a significant challenge to long-term management of the condition. Scientists recently demonstrated a remarkable feat: genetically altering another type of pancreatic cell to produce and release insulin in response to high blood sugar levels. This represents a pivotal moment in the quest for a potential cure or even a permanent remission for diabetes.
Researchers, led by postdoctoral researcher Jian Li at Harvard Medical School, embarked on this research through a genetic screen, systematically breaking DNA segments across the genome to identify genes crucial for cell identity. The process, likened to individually removing pieces of a car engine to understand the vital components, revealed that silencing a gene called ALDH3B2 dramatically increased the rate at which ductal cells—cells that previously transformed into beta cells—shifted into this state. Previously, fewer than 1 percent of ductal cells spontaneously took on a beta-cell-like state, but with ALDH3B2 silenced, that proportion increased to approximately 8.5 percent. These initial experiments were performed on human cells in a dish, which were then transplanted into mice with diabetes. The mice exhibited significantly reduced glucose levels, approaching near-normal levels, for six weeks. Science has previously explored gene therapies for diabetes, aiming to equip muscle cells with genetic instructions to make insulin. Other emerging treatments focus on generating new insulin-producing cells in the lab and then transplanting them into patients.
This research highlights the potential for harnessing existing cells and altering their function by disabling key genetic switches. However, scientists are acutely aware of the risks associated with this approach, particularly the possibility of immune activation. The researchers are now investigating whether this gene’s involvement in transforming cells into beta cells could be leveraged to create a targeted therapy, perhaps through gene therapy or the discovery of specific small molecules that inhibit the gene’s activity. Even partial improvement could have a profound impact on the estimated 830 million people worldwide who currently suffer from diabetes, including many who die annually due to related complications. The original story was published on WIRED en Español and has been translated from Spanish.
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Source: Wired Science
