Nuclear Lamins In Cardiac Development And Disease
Inside every cell, there’s a control center called the nucleus, which houses our genetic material. Supporting this nucleus is a vital internal scaffolding made of proteins called nuclear lamins. These lamins are not just structural; they play a dynamic role in maintaining the nucleus’s shape, organizing our DNA (known as chromatin), and even helping cells sense and respond to physical forces.
During the development of the heart, different types of lamins take on specific jobs. Early in development, a type of lamin called B-type lamins helps heart muscle cells grow and remain flexible. As these cells mature into the strong, pumping cells of an adult heart, another type, A-type lamins, steps in to stabilize the nuclear structure and ensure the correct genes are active.
Beyond their structural duties, these proteins are involved in regulating how genes are turned on or off and how heart cells adapt to the constant mechanical stress of pumping blood. When there are errors or mutations in the genes that produce these lamins, it can lead to a group of disorders known as laminopathies. Many of these conditions severely impact the cardiovascular system, causing diseases like cardiomyopathy, where the heart muscle becomes weakened or enlarged. Understanding the intricate roles of these nuclear proteins is essential for developing new ways to treat heart conditions linked to their dysfunction.
Source: link to paper