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You are at:Home»Technology»Breakthrough technology discovers how cholesterol causes heart attacks
Technology

Breakthrough technology discovers how cholesterol causes heart attacks

December 27, 2024004 Mins Read
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Research with the tool will have serious health benefits, the NIH said, because it allowed them for the first time to see how “bad” cholesterol, known as low-density lipoprotein cholesterol, or LDL, affects -C, accumulates in the body. , and causes heart attacks and strokes in people with genetically high LDL cholesterol levels.

This condition is known as familial hypercholesterolemia.

The genetic disease causes LDL (bad) cholesterol levels to increase and remain high. This disease appears from birth and can cause heart attacks at an early age. according to at the United States National Institutes of Health.

Researchers hope this breakthrough will help scientists cure FH, which affects 1 in 250 Americans, and increases the risk of dying from the disease. coronary artery disease at a younger age.

Currently, most people with FH treat it by taking statins or other medications. But until the NIH’s discovery in December, which allowed them to take a sort of frozen snapshot of the molecule, the actual way LDL accumulated in the body wasn’t completely understood. The results provide new information that could one day lead to new types of drugs, said Dr. Alan Remaleyprincipal investigator of lipoprotein metabolism at the NIH. “Our results provide a potential new strategy to increase the ability of the LDL receptor to bind and clear LDL from the circulation,” Remaley explained.

Dr. Aditi Das and Dr. MG Finn, both of the School of Chemistry and Biochemistry at Georgia Tech, explained in an email that this technology represents a revolution in biology and biochemistry because it allows scientists to determine the structures of biological molecules in great detail.

The functioning of molecules is determined by their structures. “When we know their structures, we know how they work, how to repair them if they fail, or how to stop them if they cause damage. Nature is the supreme molecular architect, and we need techniques like cryo-EM to see the details of what it builds,” Finn explained.

Why LDL is bad

The breakthrough came when the NIH managed to preserve the structure of LDL, creating a kind of freeze frame that literally trapped the LDL in an ice form that allowed it to be seen under an electron microscope. The images were sent to a computer algorithm which then built a 3D model of the molecule.

Cryoelectronic machines cost between $2 million and $3 million per device and have become essential tools for modern biological and biomedical research, Finn said. Atlanta has two: one to Georgia Techthe other to Emory.

The fact that LDL cholesterol contributes to cardiovascular disease has been known for some time, but until the NIH discovery, researchers couldn’t really observe the process.

LDL causes fatty deposits, called plaques, to build up in artery walls, which is a major cause of heart disease.

The purpose of LDL is not entirely harmful: its role is to transport cholesterol to cells for energy, repair, or hormone production.

But excess LDL is harmful, and the liver produces too much LDL when we eat unhealthy fats (like saturated and trans fats), which contributes to cardiovascular risk.

Excess LDL in the blood can get stuck in the arteries, triggering inflammation and narrowing blood vessels.

ExploreHow to Reduce Inflammation for a Happier Life

Over time, this plaque buildup can reduce blood flow or rupture, forming clots that block blood supply to the heart or brain, leading to heart attacks or strokes.

Saturated fats are found naturally in animal products (like butter, cheese, fatty meats) and some tropical oils (like coconut and palm oils). Eating too many foods high in saturated fat can increase LDL cholesterol.

Trans fats are found in margarine, shortening, baked goods and fried foods. They significantly increase LDL cholesterol while lowering HDL (good) cholesterol, making them much more harmful, according to to the American Heart Association.

For heart health, it’s best to replace these fats with unsaturated options like those found in fish, nuts, seeds, avocados and vegetable oils, said Dr. Danny J. Eapen, of the Cardiac Rehabilitation Center. from Emory St. Joseph Hospital and Emory University School of Medicine. Olive oil can also help lower cholesterol, especially when replacing harmful fats such as butter and margarine, Eapen said.

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