Nikhil Prasad Fact checked by:Thailand Medical News Team Jun 15, 2026 1 hour, 16 minutes ago
Medical News: A common drug that has been used for decades to treat cancer and autoimmune diseases may soon find a surprising new role in protecting against some of the most devastating illnesses linked to aging. Researchers are now reporting that methotrexate, a medication first introduced in the 1940s, could help reduce the risk of heart disease, diabetes, dementia, and Parkinson’s disease by targeting the chronic inflammation that drives many age-related disorders.
Researchers discover that the decades-old drug methotrexate may help protect the heart and brain from age-related diseases by targeting chronic inflammation
The study was conducted by researchers from the Discipline of Clinical Pharmacology, College of Medicine and Public Health, Flinders University; the Flinders Health and Medical Research Institute; and the Department of Clinical Pharmacology, Flinders Medical Centre, Southern Adelaide Local Health Network, Australia.
Why Scientists Are Looking at Methotrexate Again
As people grow older, their bodies experience a gradual increase in chronic low-grade inflammation, a process often referred to as “inflammaging.” Scientists believe this persistent inflammation plays a major role in the development of cardiovascular disease, obesity, diabetes, Alzheimer’s disease, Parkinson’s disease, and other age-related conditions.
Methotrexate has long been used at high doses for certain cancers and at much lower doses for autoimmune diseases such as rheumatoid arthritis. Researchers have now discovered that the drug affects many biological pathways beyond its traditional role in blocking folate metabolism.
These newly identified actions suggest that methotrexate may influence aging itself and the diseases that accompany it.
Multiple Protective Mechanisms Identified
The review highlights several ways methotrexate may help protect the body. One of its most important effects involves increasing levels of adenosine, a naturally occurring molecule that reduces inflammation, limits harmful immune activity, and supports healthy blood vessel function. Higher adenosine levels may also improve cholesterol handling and glucose metabolism.
Researchers also found evidence that methotrexate activates AMP-activated protein kinase, or AMPK, often described as the body’s metabolic master switch. AMPK helps cells produce energy efficiently, improves insulin sensitivity, reduces harmful fat accumulation, and supports healthy blood vessels.
The drug was also shown to influence the JAK/STAT signaling pathway and the inflammatory protein HMGB1, both of which have been linked to aging, cardiovascular disease, and neurodegenerative disorders.
Another intriguing finding is that methotrexate can alter the gut microbiome. By changing the balance of intestinal bacteria, the drug may reduce inflammatory signals that contribute to obesity, atherosclerosis, and brain degeneration.
Potential Benefits for Heart and Metabolic Health
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Experimental studies reviewed by the researchers showed that methotrexate may reduce plaque formation in arteries, improve blood vessel function, enhance cholesterol removal from tissues, and decrease vascular inflammation.
Additional research suggests the drug may improve glucose control, increase insulin sensitivity, and reduce some of the biological processes that contribute to obesity and metabolic syndrome.
These findings are particularly important because cardiovascular disease and diabetes remain among the leading causes of illness and death worldwide.
Possible Protection Against Dementia and Parkinson’s Disease
The review also revealed encouraging evidence that methotrexate may help protect the aging brain.
Laboratory and animal studies suggest that pathways affected by methotrexate can reduce amyloid buildup, lower harmful inflammation in brain tissue, improve cellular cleanup mechanisms, and protect nerve cells from damage.
Some observational studies have reported lower rates of certain neurodegenerative diseases among people receiving low-dose methotrexate for autoimmune conditions. Although more research is needed, these findings have generated significant interest among scientists investigating new strategies to combat dementia and Parkinson’s disease.
Growing Interest in Drug Repurposing
This
Medical News report highlights a growing trend in medicine known as drug repurposing, where older medications are investigated for entirely new uses. Because methotrexate has been prescribed for decades, doctors already understand much about its safety profile, making future clinical investigations easier and potentially less expensive.
Conclusion
The new review presents compelling evidence that methotrexate may offer benefits far beyond its established uses in cancer and autoimmune diseases. By simultaneously targeting inflammation, metabolic dysfunction, immune dysregulation, gut microbiota changes, and cellular aging pathways, the drug appears uniquely positioned as a potential therapy for multiple age-related disorders. While definitive clinical trials are still needed, the growing body of evidence suggests that low-dose methotrexate could eventually become an important tool in preventing or slowing cardiovascular and neurodegenerative diseases associated with aging.
The study findings were published in the peer reviewed journal: Pharmacological Reviews.
https://www.sciencedirect.com/science/article/pii/S0031699726000359
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https://www.thailandmedical.news/articles/med-news
https://www.thailandmedical.news/articles/alzheimer,-dementia-
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