Hayflick, Leonard

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Leonard, U.S. microbiologist, 1928–.
Hayflick limit - the limit of human cell division in subcultures.
References in periodicals archive ?
Leonard Hayflick discovered that cells growing in laboratory cultures possess a species-specific limit to the number of times they will reproduce by cell division.
Hall introduces Leonard Hayflick, who not only set the scientific stage for stem cell research, but also fought successfully for the right to profit from his discoveries, paving the way for today's biotechnology companies.
Another example of antagonistic pleiotropy was discovered by the biologist Leonard Hayflick in 1961.
Leonard Hayflick, an expert on aging at the University of California, denounced what he called 'outrageous claims' by some scientists that humans are capable to living well past 100 years.
About four decades ago Leonard Hayflick and Paul S.
Second, we have a better appreciation of the underlying mechanisms of ageing thanks to the work of Leonard Hayflick (the 'Hayflick limit') and the work of Anthony Cerami (glycation of proteins in ageing).
It was only in the late 50s, for example, that Leonard Hayflick demonstrated that human cells-with the notable exception of cancer cells-replicate a maximum of 50 times.
The speakers included Leonard Hayflick, PhD, Robin Holliday, PhD, Steven Austad, PhD, and Thomas Kirkwood, PhD.
In 1962, Leonard Hayflick of the Wistar Institute in Philadelphia reported that human cells maintained in a test tube undergo a finite number of doublings, about 50, before they enter a nondividing stage of life known as senescence.
This study represents a milestone in our efforts to understand how mammalian longevity is determined," said Leonard Hayflick, Ph.
A series of elegant and now classic experiments by the biologist Leonard Hayflick in the 1950s showed, in fact, that there is a limit to how many times human somatic cells can reproduce in vitro before they simply stop.