2026-05-22T16:05:40Zhttps://keep.lib.asu.edu/oai/request

oai:keep.lib.asu.edu:node-1728692023-04-20T22:31:32Zoai_pmh:alloai_pmh:repo_items

172869 https://hdl.handle.net/10776/8237 2014-11-14 eng Bartlett, Zane Turriziani Colonna, Federica Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia. Arizona Board of Regents open access http://creativecommons.org/licenses/by-nc-sa/3.0/ The Hayflick Limit is a concept that helps to explain the mechanisms behind cellular aging. The concept states that a normal human cell can only replicate and divide forty to sixty times before it cannot divide anymore, and will break down by programmed cell death or apoptosis. The concept of the Hayflick Limit revised Alexis Carrel's earlier theory, which stated that cells can replicate themselves infinitely. Leonard Hayflick developed the concept while at the Wistar Institute in Philadelphia, Pennsylvania, in 1965. In his 1974 book Intrinsic Mutagenesis, Frank Macfarlane Burnet named the concept after Hayflick. The concept of the Hayflick Limit helped scientists study the effects of cellular aging on human populations from embryonic development to death, including the discovery of the effects of shortening repetitive sequences of DNA, called telomeres, on the ends of chromosomes. Elizabeth Blackburn, Jack Szostak and Carol Greider received the Nobel Prize in Physiology or Medicine in 2009 for their work on genetic structures related to the Hayflick Limit. Cells Cell populations Cell Death Apoptosis Cell Proliferation Cell Cycle Carrel, Alexis, 1873-1944 Aging Telomere Chromosomes Telomerase Greider, Carol W. Hayflick, Leonard Carrel, Alexis, 1873-1944 Wistar Institute of Anatomy and Biology Greider, Carol W. The Hayflick Limit