Recent research from NYU Langone Health has unveiled a potential link between the neutrophil to lymphocyte ratio (NLR) and the risk of developing Alzheimer's disease and related dementias. Neutrophils, a type of white blood cell, serve as the body's first line of defense against infections and inflammation. Their levels can rapidly increase in response to immune system activation, impacting the balance with other immune cells.
The study analyzed NLR data from approximately 400,000 patients across two major healthcare systems, highlighting that elevated NLR levels are associated with an increased likelihood of dementia, both in the short and long term. This correlation was consistent across diverse patient groups, with Hispanic individuals exhibiting a particularly strong association. Women also showed a heightened risk linked to elevated NLR.
While a high NLR alone is not a definitive predictor of dementia, researchers suggest it could serve as an indicator for individuals who may require closer monitoring or early interventions, particularly when considered alongside other risk factors. The study proposes that neutrophils may play a more active role in the progression of Alzheimer’s disease, potentially contributing to damage in blood vessels and brain tissue.
The research team, led by Dr. Tianshe He and Dr. Jaime Ramos-Cejudo, emphasizes the importance of continued investigation into the relationship between neutrophils and cognitive decline. They are exploring whether neutrophils merely serve as markers of Alzheimer's or actively contribute to disease progression, which could lead to new therapeutic targets.
The findings, published in the journal Alzheimer's & Dementia, underscore the need for further research to validate these associations and their implications for early diagnosis and treatment strategies.