One of the primary limitations of stem cell treatment and the subject of ongoing research is the challenge of directing stem cells to their necessary destination in the body which has been a subject of ongoing research. Prior studies have discovered that stem cells are drawn to inflammation in the body, however, using this as a therapeutic lure still poses risks. Thus, researchers continue their search for tools that would aid stem cells in their migration and conversion into specific types of cells necessary for optimal treatment. The ability to do so would have a wide range of implications for regenerative medicine as well as the treatment of disorders in which inflammatory signals fade over time, such as chronic spinal cord injury, stroke, or conditions in which the role of inflammation remains unknown. Continue reading
With a focus on extending and improving the human lifespan, the medical community continues to explore potential avenues in longevity. One such development has directed increased attention to the practice of senolytics – or, the process of flushing senescent cells from the body to discard harmful proteins. Senescent cells are malfunctioning, aged cells which can trigger inflammation and dysfunction, developed in response to disease, injury, or cancerous formations.
These cells can remain in the body, contributing to the development of many diseases and features of aging, such as heart disease, dementia, osteoporosis, and lung disease. Removing senescent cells from mice was found to alleviate insulin resistance, cell dysfunction, and ameliorate other complications in cases of kidney failure and disease.
A recent DNA repair discovery could potentially lead to the creation of drugs that can reverse aging, fight cancer, and help assist in eliminating the effects radiation exposure. While it has long been known that DNA repair is essential for cell vitality, cell survival, and cancer prevention, the decline in cells’ ability to repair damaged DNA with age has not been fully understood.
A team of scientists at Harvard Medical School has identified a critical step in assessing how cells repair damaged DNA. Published in the journal Science, the international team’s study pinpointed a vitamin called NAD+, which regulated the interactions that control DNA repair. When mice were given an NAD+ booster called NMN, experiments indicated that their cells were more effective in repairing DNA damage caused by aging, and radiation exposure. The mice’s DNA repair activities markedly shifted to ‘youthful levels,’ and further trials demonstrated that they were more resistant to radiation; therefore, they were more protected against cancer and aging itself.
Human trials of NMN therapy will begin in Boston, in the next six months. One of the lead professors on the team from Harvard discussed the potential for evaluating how people walk, their strength, and ultimately transitioning the molecule to a substance on the drug market, in order to treat diseases like cancer, Alzheimer’s, and diabetes. The results further shed light on a possible therapy to avert the unwanted side effects of environmental radiation, by restoring NAD levels by NMN treatment—in addition to radiation exposure from cancer treatments.