Aldons J Lusis

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Researchers studied hundreds of genes to understand why some people develop atherosclerosis (clogged arteries) and others don't, using data from large groups of people and experiments in mice. They found that multiple genes control different parts of the disease—including how the body handles cholesterol, inflammation, blood pressure, and heart function—and identified new ways these genes interact to cause arteries to clog. This knowledge is already helping doctors better predict who will get atherosclerosis and is opening doors to new treatments that could prevent or reverse the disease.

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Researchers compared two types of engineered immune cells—CAR-T cells and CAR-NKT cells—to see which works better against solid tumors like lung or pancreatic cancer. They found that CAR-NKT cells are significantly better at entering tumors, staying alive longer in the body, and responding to different immune checkpoint drugs than CAR-T cells. This matters because current CAR-T therapies work well against blood cancers but struggle with solid tumors, and this research shows CAR-NKT cells could be a better alternative and identifies which drug combinations to pair with each cell type.

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Pseudoxanthoma Elasticum is a rare genetic disease where the liver fails to produce a working protein called Abcc6, which causes calcium to abnormally build up in the heart and other tissues after injury. Researchers found that the problem originates in the liver—when they removed the Abcc6 gene specifically from the liver (but not the heart) in mice, the animals still developed calcium deposits in their hearts, proving the liver is responsible for controlling this damaging process. The calcium buildup happens because the liver defect disrupts how cells produce energy and process nutrients, and treating affected mice with drugs that block calcium mineral formation successfully prevented the heart damage.

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Researchers reviewed how two common diseases—a type of heart failure (HFpEF) and fatty liver disease (MASLD)—are actually connected parts of the same underlying problem: the body's struggle to process fat and energy properly, usually caused by obesity. The liver and heart directly influence each other through chemical signals and substances they release, meaning damage to one organ worsens the other in a vicious cycle. Doctors need to recognize these diseases as linked conditions and treat patients by addressing the shared root cause—metabolic dysfunction—rather than treating the heart and liver separately.

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Researchers studied mice with reduced levels of a detoxification enzyme called Glo1 to understand how it affects metabolism and disease risk. They found that having less of this enzyme caused weight gain, high blood sugar, and abnormal cholesterol levels—but these problems developed differently in males versus females and only appeared after several weeks of age. The surprising discovery was that these metabolic problems weren't caused by the buildup of toxic compounds (AGEs) that scientists expected; instead, the body's altered ability to process glucose and fats through alternative chemical pathways was the real culprit, controlled by specific genes that work differently in males and females. This matters because it shows that sex differences in metabolic disease have a genetic basis beyond what researchers previously understood, which could lead to better personalized treatments for diabetes and heart disease depending on someone's biological sex.

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Researchers found that a natural plant compound called Akebia Saponin D can activate brown fat in the body to burn more calories and energy, which helped obese mice lose weight. The compound works by binding to a specific protein (USP4) that normally gets degraded, allowing another protein (PPAR-gamma) to stay active longer and turn on the fat-burning machinery in brown fat cells. This discovery suggests the compound could become a drug to treat obesity by essentially revving up the body's natural calorie-burning engine.

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Researchers compared how genes affect traits differently in males versus females across mice and humans, discovering that thousands of genes contribute to common traits—far more than traditional studies find. They noticed that genes affecting a trait in men tend to affect it the same way in women, even when the effects are too small to detect individually, which helped them identify previously hidden genetic influences. These findings could improve personalized medicine by revealing the true genetic complexity behind diseases and traits, while also warning that some apparent genetic interactions might be false alarms created by these widespread small effects.

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Researchers found that an enzyme called NNMT controls how much of a molecule called NAD is available in immune cells (macrophages) that contribute to heart disease. When they blocked NNMT in mice, the macrophages couldn't multiply as easily, more of them died off, and atherosclerosis (fatty buildup in arteries) shrank dramatically—by 5 to 10 times. This matters because it identifies a new target for treating heart disease: instead of attacking cholesterol or inflammation directly, drugs could be designed to disrupt the NAD-recycling system that keeps disease-promoting immune cells alive and multiplying.

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Researchers measured a substance in the blood called TMAO (produced by gut bacteria) in nearly 900 patients with aortic aneurysms and found that people with high TMAO levels were 2-3 times more likely to have aneurysms that grew rapidly and required surgery. The findings held true across two separate patient groups in Europe and the US, suggesting TMAO is a reliable warning sign independent of other known heart disease risk factors. This blood test could help doctors identify which patients need closer monitoring or earlier surgery to prevent their aortic aneurysm from rupturing.

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Researchers fed mice different diets and used advanced genetic analysis to discover how a compound called TMAO (produced when gut bacteria break down certain foods) weakens the protective structure of arterial plaques by making smooth muscle cells die off and reducing collagen buildup. They found that TMAO also triggers immune cells called macrophages to break down the plaque's structural support, and they confirmed these effects happen in human cells too. This matters because atherosclerotic plaques that are weakened and unstable are more likely to rupture and cause heart attacks or strokes.

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Researchers developed a new type of immune cell therapy using CAR-NKT cells to treat ovarian cancer, which often resists standard CAR-T cell treatments because tumors hide from the immune system and create a protective environment around themselves. CAR-NKT cells work better than regular CAR-T cells because they attack cancer cells through multiple methods, find tumors more effectively, and reshape the cancer's protective environment while causing fewer dangerous side effects. Because these cells can be made from donor sources and don't cause the rejection problems that usually limit immune cell therapy, they could become a ready-made treatment that hospitals stock and use immediately rather than custom-making cells for each patient.

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Researchers tested a new drug called Oxy210 on mice developing a serious liver disease called MASH (a fatty liver condition that causes inflammation and scarring). They found that diseased livers showed signs of cellular aging and senescence—where cells stop dividing and release harmful chemicals that trigger scarring and inflammation—and that Oxy210 successfully blocked this aging process and reduced liver damage. This matters because MASH is becoming a leading reason people need liver transplants, and there are currently few effective treatments; if Oxy210 works the same way in humans, it could offer patients a new way to stop their livers from scarring and failing.

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Researchers exposed mice to diesel exhaust for four months and found it damaged the healthy bacteria in their guts, lowered levels of a beneficial substance called acetate that those bacteria produce, and caused the mice to develop high cholesterol, high triglycerides, and fatty livers. When they tested diesel particles on human liver cells in the lab, the same damage occurred—but adding acetate back in reversed the problem. This matters because it explains one way air pollution harms our hearts and metabolism: it destroys beneficial gut bacteria, which stops the production of acetate that normally protects our liver and heart health. Acetate supplementation might be a way to counteract some of the damage from air pollution exposure.

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Men and women store fat differently in their bodies, and this new research shows those differences go down to the genetic and molecular level. Scientists studied fat tissue from male and female mice and found that the fat near the groin (which is similar to belly fat in humans) works differently in men versus women—men's version burns energy more actively and releases more fatty acids into the bloodstream, while women's version recycles fatty acids more efficiently and generates heat through a different mechanism than the well-known heat-producing protein UCP1. This matters because understanding these sex-specific fat differences could explain why men and women respond differently to diet, exercise, and weight gain, and could lead to better, personalized approaches to treating obesity and metabolic disease in each sex.

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Researchers discovered that a specific protein called LPCAT3 helps fat cells store energy more efficiently by reorganizing fats in their membranes—particularly omega-6 fats from your diet. When this protein works properly, it allows fat cells to grow larger and store more energy, keeping excess fat from accumulating in the liver and other organs where it causes insulin resistance and metabolic problems.

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Researchers reviewed evidence showing that liver disease and heart disease are deeply connected—a sick liver makes heart problems more likely, and vice versa, because these organs constantly send chemical signals to each other and affect how blood flows through the body. Fat buildup in the liver, alcohol damage, and severe liver scarring all increase the risk of heart failure and other heart problems by triggering inflammation and changing how the heart's structure works. Understanding how these organs communicate through specific molecules could lead to new treatments that fix both organs at the same time instead of treating them separately.

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Researchers discovered that a protein called estrogen receptor alpha (ER alpha), which is usually associated with female hormones, plays a crucial role in keeping muscles healthy and metabolically fit in men. When male mice had more of this protein in their muscles, they stayed leaner, maintained better blood sugar control, and their muscles adapted better to exercise—all by improving how well their mitochondria (the cell's energy factories) functioned. This matters because it reveals a new target for treating obesity and diabetes in men, and suggests that activating this protein in muscle tissue could help both men and women fight metabolic disease.

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Researchers studied 90 different mouse strains to understand how a mouse's genes shape which bacteria live in its gut and what those bacteria do. They found that genetic differences in how much amylase (a digestive enzyme) a mouse produces directly affect which types of bacteria thrive in its gut, particularly bacteria that break down starches and sugars differently. These findings matter because they show that your genes don't just affect your body—they actively control which microbes colonize your intestines, and those microbes in turn influence your health outcomes like liver damage and cholesterol levels. This suggests that understanding your own amylase genes could eventually help predict and manage your gut bacteria and metabolic health.

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Researchers discovered that the human heart can naturally make ketones (a type of fuel), and this ability is crucial for treating a common type of heart failure called HFpEF. They found that a protein called HMGCS2 controls this ketone-making process, and when they boosted levels of a molecule called NAD (which helps cells produce energy), it fixed the broken ketone-making machinery and restored heart function. This matters because HFpEF is now the most common type of heart failure worldwide with few treatment options, and this discovery explains how a promising drug class works and points to NAD as a potential new treatment.

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Researchers studied a protein called collagen V in kidneys after injury and found that animals lacking this protein developed worse scarring and lost more kidney function—but giving them a drug called cilengitide that blocks a related pathway restored their kidney health. In humans, people with low levels of collagen V were more likely to develop kidney disease, suggesting this protein normally helps protect kidneys from permanent damage after injury.

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Researchers discovered that a protein called TMEM11 in immune cells' power plants controls how the cells use energy to either fight infections or store fat, and when this protein is missing, the cells become weaker at causing autoimmune disease. The mechanism works through reactive oxygen species (natural byproducts of energy production) that act as a switch, pushing cells toward fat storage instead of producing inflammatory molecules that attack the body's own tissues. This discovery could lead to new treatments for autoimmune diseases by targeting this metabolic switch.

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Researchers fed mice a high-cholesterol diet with or without an added compound called TMAO (found in red meat and eggs) and examined how it affected blood vessel cells involved in heart disease. They discovered that TMAO makes smooth muscle cells in artery walls self-destruct and weakens the structural proteins that hold plaques together, while also triggering immune cells to break down these protective proteins—all of which destabilizes dangerous plaques in arteries. This matters because unstable plaques are more likely to rupture and cause heart attacks or strokes, so understanding how TMAO weakens plaque structure could explain why people who eat certain foods have higher heart attack risk and might point to new ways to prevent heart disease.

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Researchers studied a gene called Ubiad1 and found that it controls how the liver processes different types of fats, with different effects in males and females. When they reduced Ubiad1 in mice eating a high-fat diet, females accumulated more of a harmful fat called ceramide in their livers, while males had lower levels of other protective fats. This matters because understanding how this gene affects liver fat metabolism differently in men and women could help explain why people respond differently to diet and might lead to better treatments for liver disease and obesity.

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Researchers studied 76 people with abdominal aortic aneurysms (a dangerous bulging of the main artery in the belly) and 228 healthy people to understand why some people develop this condition. They found that smoking and pesticide exposure leave chemical traces in the body that are linked to aneurysm development, and that certain genes make people more vulnerable to damage from these exposures. This matters because it shows doctors that preventing AAA requires tackling both lifestyle choices and genetic risk—meaning future treatments could be tailored to each patient's genetic makeup and exposures.

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Researchers reduced levels of an enzyme called Glo1 in mice to study how it affects metabolism and found that mice with lower Glo1 developed obesity, high blood sugar, and abnormal cholesterol levels—but only after a certain age and in different ways depending on whether they were male or female. The researchers expected these metabolic problems to come from toxic molecules called AGEs building up in the body, but they found that AGEs weren't actually accumulating in most tissues, meaning something else was responsible for the damage. Instead, their detailed analysis showed that Glo1 reduction disrupts the normal function of genes that control how the body processes sugar and fat, and this disruption varies between males and females—which explains why the same genetic change causes different health problems depending on sex.

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Researchers investigated whether higher levels of glycine (a common amino acid) actually prevents heart disease, or if the observed association is just a coincidence. They studied over 100,000 people and found that those with higher glycine levels had fewer heart attacks, but when they used genetic tools to test whether glycine directly causes this protection and gave glycine supplements to mice prone to heart disease, neither showed that glycine actually prevents heart problems. The bottom line: while people with naturally high glycine do have healthier hearts, giving more glycine doesn't appear to be the reason why—suggesting that something else about these people's health or genetics is protecting them, not the glycine itself.

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Researchers developed a practical laboratory method to create cancer-fighting immune cells called CAR-NKT cells from basic blood stem cells, producing large quantities of high-quality cells ready for medical use. When tested against multiple myeloma (a blood cancer), these cells attacked tumors effectively, expanded in number, persisted in the body, and disabled the immune-suppressing mechanisms that cancers use to hide—all while avoiding dangerous side effects like organ rejection or severe inflammatory reactions. This breakthrough matters because these cells could be manufactured once and used as an "off-the-shelf" treatment for many patients, avoiding the current expensive and time-consuming process of creating custom cancer-fighting cells for each individual patient.

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Researchers discovered that a specific protein called LPCAT3 helps fat cells store energy more efficiently by organizing omega-6 fatty acids (found in many processed foods) into the cell's membranes. When this protein works properly, fat cells can expand and store more calories without causing insulin resistance and metabolic problems. When mice were fed a high-fat diet but had this protein disabled or consumed less omega-6 fat, their fat cells couldn't store energy properly, causing fat to accumulate in the wrong places (like the liver and muscles) and leading to insulin resistance—but their bodies burned more calories trying to compensate. This finding matters because it explains a molecular mechanism connecting what we eat (specifically omega-6 fatty acid intake), how much fat our bodies can safely store, and whether we develop obesity and diabetes.

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Researchers discovered that a protein called GPNMB, produced by immune cells in the bone marrow, helps hearts recover after a heart attack by communicating through a receptor called GPR39. When they removed this protein from mice, the animals died more often and their hearts failed faster after a heart attack; when they increased the protein, heart function improved. This matters because it reveals a new biological mechanism for heart repair that could eventually lead to treatments to save lives after heart attacks.

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Researchers tested a new drug called Oxy210 on mice prone to heart disease and fatty liver disease, feeding some a high-fat diet while treating others with the drug. The drug cut atherosclerosis (clogged arteries) in half, lowered cholesterol, and reduced damaging inflammation in blood vessel cells and immune cells. Since heart disease and fatty liver disease often occur together and share the same causes, this drug could potentially treat both conditions at once by fighting the chronic inflammation that underlies metabolic syndrome.

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Researchers tracked over 10,000 people who had COVID-19 and compared them to 217,000 people who didn't, following them for more than 1,000 days to see who had heart attacks, strokes, or died. People hospitalized with COVID-19 had nearly four times the risk of these cardiac events compared to the general population—a risk level equivalent to having coronary artery disease itself, and even higher than people who already had heart disease but didn't have COVID-19. The study found that your blood type matters: people with non-O blood types who were hospitalized with COVID-19 had a significantly higher risk of blood clots and related events, while people with O blood type did not show this increased risk. This means COVID-19 causes lasting heart and stroke damage for over 1,000 days after infection, especially in hospitalized patients, and your genetics (

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Researchers had people exercise for 12 weeks and measured thousands of proteins in their blood, finding that exercise changed 283 proteins—many of which were linked to better blood sugar control and less liver fat. One protein called CD300LG stood out: it increased with exercise, was associated with better insulin sensitivity and glucose levels, and appears to directly cause improvements in blood sugar control based on genetic analysis and mouse studies. CD300LG could become a simple blood test to measure whether someone is physically active and might also work as a drug target to help prevent type 2 diabetes.

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Researchers tracked 10,194 Finnish men for about 17 years to see if chemicals produced by gut bacteria could predict heart attacks, strokes, and cardiovascular disease. They found that higher levels of a gut bacterial byproduct called succinate was linked to increased heart disease risk, while another metabolite called ursodeoxycholic acid was linked to higher stroke risk. The finding suggests that the bacteria living in your gut affect your risk of heart disease and stroke through the chemicals they produce, opening up the possibility that doctors could someday treat these conditions by modifying which bacteria live in your gut rather than just managing traditional risk factors like cholesterol and blood pressure.

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Researchers exposed immune cells called macrophages from 24 different mouse strains to diesel exhaust particles to understand how air pollution damages the heart and lungs. The particles triggered the same protective stress-response genes in all the mice, but different strains activated these defenses to different degrees, suggesting that genetics influences how severely someone's immune system reacts to air pollution. This matters because it explains why air pollution affects different people differently—some people's genetics make their immune cells better equipped to fight off the damage from dirty air, while others are more vulnerable.

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Researchers studied why heart attack patients—especially men—develop dangerous irregular heartbeats, focusing on the vagus nerve, which normally protects the heart. They found that after a heart attack, men's vagus nerves lose the ability to send protective signals to the heart because of chemical and energy problems in nerve cells, while women's nerves stay relatively protected, likely because of natural estrogen. When they gave estrogen to male mice after a heart attack, it restored the nerve's protective signaling and prevented the dangerous heart rhythms.

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Researchers measured different types of bile acids (digestive compounds made from cholesterol) in the blood of over 2,000 people and found that certain types are linked to diabetes and weight gain, while others protect against these conditions. They also identified specific genes that control these bile acid levels, and proved that two bile acids in particular—one called DCA that increases diabetes risk and another called iso-LCA that decreases it—directly influence body weight and diabetes development. This matters because bile acids could become new targets for preventing or treating diabetes and obesity, and these findings suggest doctors might one day use bile acid levels as an early warning sign for metabolic problems.

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Researchers fed six different strains of mice either very high or very low iron diets for 6-8 weeks and measured how it affected their bones. They found that too much iron damaged the outer layer of bone (cortical bone) in all mice tested, but the damage was worse when the diet was missing other important nutrients like vitamins and minerals—suggesting those nutrients can help protect bones from iron overload. Iron deficiency alone didn't consistently harm bones and actually increased bone density in some mouse strains, meaning the body's response to low iron varies genetically. The key takeaway: iron overload damages bones, but eating a diet rich in other nutrients can reduce that damage, and different people may respond differently to low iron based on their genetics.

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Researchers discovered that a protein called TRIM13 causes heart disease by blocking cells from getting rid of excess cholesterol and forcing them to absorb more damaged cholesterol instead—a process that turns cells into cholesterol-filled "foam cells" that damage arteries. When they deleted the TRIM13 gene in mice fed a high-fat diet, the animals developed significantly less heart disease because their cells could properly eliminate cholesterol and resist becoming foam cells. The same harmful pattern appears in human patients with clogged arteries, where TRIM13 levels are high and correlate with how severe the blockages are.

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Researchers studied over 10,000 men to see which chemicals produced by gut bacteria are linked to metabolic syndrome—a dangerous combination of conditions like obesity, high blood sugar, high cholesterol, and high blood pressure. They found that 32 different bacterial metabolites were associated with these health problems, with three showing particularly strong connections: one chemical made insulin resistance and weight gain worse, another amplified those same problems even more strongly, and a third actually protected against them. However, when the researchers used a special statistical method to test whether these bacterial chemicals actually *cause* the metabolic problems (rather than just appearing alongside them), they found no proof of direct causation, suggesting the relationship is more complicated than a simple cause-and-effect.

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Researchers studied 90 different mouse strains to understand how genes that affect digestion also shape the bacteria living in their guts and influence their metabolic health. They discovered that mice with fewer copies of genes for amylase (an enzyme that breaks down starch) had different populations of gut bacteria that specialize in processing different types of carbohydrates, and these bacterial differences were linked to differences in liver health and cholesterol levels. This matters because it shows that small genetic differences in how we digest food directly change which bacteria live in our guts, which in turn affects our risk for diseases like high cholesterol and liver problems.

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Researchers used genetic data to trace which proteins and metabolites (small molecules) in the blood directly cause changes in each other, rather than just occurring together by chance. They found several new protein-metabolite pairs that have a direct causal relationship, which had never been identified before. Understanding these relationships helps explain how our genes affect our health and could eventually lead to better ways to diagnose and treat diseases.

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Researchers discovered that people with a common type of heart failure have lower levels of a substance called IPA that's naturally produced by gut bacteria. When they gave this IPA to mice with the same heart condition, it improved their heart function and reduced inflammation and stress in heart tissue. The findings suggest that taking IPA as a dietary supplement or changing someone's gut bacteria composition could potentially treat this type of heart failure in patients.

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Researchers found that people with higher levels of glycine (an amino acid) in their blood have lower rates of heart disease, but genetic and experimental evidence suggests this correlation doesn't mean glycine actually prevents heart disease—the connection appears to be coincidental or driven by other factors. They studied over 100,000 people, analyzed genetic data from nearly a quarter-million individuals, and gave glycine supplements to mice prone to heart disease, but none of these approaches showed that glycine itself protects the heart. The findings matter because they show that not all medical associations found in large populations are actually causal relationships, which is crucial for deciding whether to recommend supplements or treatments to patients.

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Researchers compared genetic data from humans with heart disease to genetic data from mice with similar artery disease to see if they develop the problem the same way. They found that humans and mice share more than 75% of the same disease pathways, meaning the biological mechanisms causing the disease are largely identical between the two species—though each has some unique factors. This matters because it tells scientists which mouse studies can reliably predict what will work in human heart disease treatments, and which ones might not translate to humans, saving time and money in drug development.

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Researchers reviewed new tools that map how genes control each other in heart disease, the world's leading cause of death. These mapping tools can now analyze thousands of genes and cells at once, revealing hidden genetic causes of heart disease that traditional genetic studies miss. These networks help doctors identify which genes actually drive heart disease and how the disease develops differently between men and women—information that could lead to better treatments.

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Researchers reviewed how scientists study diseases that are caused by many different genes working together, plus environmental influences—which makes them hard to understand. They described a method called systems genetics that tracks how DNA changes affect the body's molecules (like RNA, proteins, and other chemicals) and how those molecular changes eventually lead to disease. The review explains the tools and resources available for this type of research so scientists across different fields can use them to figure out what causes complex diseases.

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Researchers fed mice a ketogenic diet (high fat, low carb) and infected them with COVID-19 to see if diet affected how sick they got. Mice on the ketogenic diet lost less weight, survived better, and showed significantly less inflammation throughout their bodies compared to mice on a regular diet. The findings matter because they suggest that what you eat can directly influence how severely COVID-19 affects your body—specifically by reducing the dangerous inflammatory response that causes organ damage and makes infections worse.

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Researchers studied a protein called MGP and discovered it plays a key role in liver damage caused by fatty liver disease (NASH). They found that when MGP levels are low, the liver's cells that cause scarring don't respond properly to inflammatory signals, which actually reduces fibrosis—suggesting that reducing MGP might be protective. In human patients with NASH, higher MGP levels correlated with worse liver scarring, indicating this protein is relevant to real disease progression and could be a target for new treatments.