Scientists have discovered a hidden brain alteration that began around the age of 50.
Recently, there have been a number of recent developments in the field of international medical health that continue to attract the attention of industry and the public. A study funded by the National Institutes of Health (NIH) revealed a major shift in the immune environment of the hippocampus, which is central to learning and memory in the brain. The findings suggest that this immune reconstitution begins in middle age and may help explain why aging can lead to chronic brain inflammation, a chronic brain inflammation common in neurodegenerative diseases.
Richard Hodges, M. D. , a senior professor of molecular pathology and nutrition at the National Institutes of Health (NIH), said that the single biggest risk factor for Alzheimer's disease, aging dementia, is unknown, but our understanding of how to further develop this goal by driving the disease is still in its infancy.
The study, conducted by the University of California, San Diego, the City of New York's Genetic Center, and the University of California, Los Angeles, used an advanced single-cell study method to study 40 neurobiologically healthy adults between the ages of 20 and 95 years of age in their mid-to-late 20 to 95 years of age, and their analysis found that microbes, the brain's main immune cells, were gradually declining from about 50 to 75 years of age. At the same time, they appeared to have been replaced by extracellular blood with stronger inflammatory signals and other immune cell-like origins. This discovery challenges the long-standing hypothesis of microbes.
These cells are first formed during embryonic growth and development, and scientists generally assume that these cells remain present in the brain and continuously renew themselves throughout a person's life. Advanced tools reveal the origins of cells by combining standard genetic activity measurement with new methods (in combination with 2D-structured and chemically modified genomes) to study in great detail the biological effects of aging on the human brain. The first author, Dr.
Nathan Zemke, said in the Journal of Hyaluronic Acid: 'Hyaluronic gene expression tells us what the cells are doing today, but epigenetic signatures preserve information about where the cells came from'. With these methods, we reveal significant changes in the identity and roots of aging human brain immune cells that would not be revealed if they were based solely on genetic activity data'. The study also found that aging affects the differentiation and function of immune cells, thus affecting the biological function of immune cells, such as killing agents, regulating inflammatory responses, activating immune cell activity, etc.
It should be noted that the above information is based on international public research, and is for reference in HealthCop, and does not constitute a clinical recommendation.
