Senescent cells accumulate with age in all tissues, and their presence is one of the root causes of aging. Cells become senescent in large numbers at all ages, and under a variety of circumstances: toxins, wound healing, ordinary somatic cells reaching the Hayflick limit, random mutational damage to important genes, and so forth. Senescence irreversibly shuts down cellular replication, making it a useful defense against cancer. Near all newly senescent cells are destroyed quickly. They either self-destruct or they are destroyed by the immune system, but both paths to a reliable natural clearance of senescent cells falter with the damage and dysfunction of aging. Lingering senescent cells that have evaded destruction never rise to more than a few percent of all cells by number, even ...
MedWorm Message: Have you tried our new medical search engine? More powerful than before. Log on with your social media account. 100% free.
from #Head and Neck by Sfakianakis via simeraentaxei on Inoreader http://bit.ly/2RG6erG
Δεν υπάρχουν σχόλια:
Δημοσίευση σχολίου
Σημείωση: Μόνο ένα μέλος αυτού του ιστολογίου μπορεί να αναρτήσει σχόλιο.