Lactate-Lactylation Axis As An Emerging Metabolic-Epigenetic Pathway In Diabetic Microvascular Complications
For a long time, lactate was simply considered a byproduct of our body’s energy production. However, recent research reveals it plays a much more active role, acting as a key signaling molecule and a regulator of our genes. This happens through a process called lactylation, where lactate attaches to proteins, including those that package our DNA, thereby influencing how our genes are expressed.
In conditions like diabetes, where blood sugar levels are consistently high, our cells produce an excess of lactate. This surge in lactate then drives up lactylation. This increased lactylation is not harmless; it’s now understood to be a significant contributor to the development of diabetic microvascular complications, which are problems affecting the small blood vessels in organs like the eyes, kidneys, and nerves. Essentially, this pathway connects the metabolic changes caused by high blood sugar to epigenetic alterations—changes in gene activity without altering the DNA sequence itself—that mimic and accelerate the aging process in these delicate blood vessels. Understanding this intricate connection between metabolism and gene regulation through lactylation opens up exciting new avenues for developing diagnostic tools and therapeutic strategies to combat these debilitating diabetic complications.
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