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Levels of p53 play an important role in the maintenance of stem cells throughout development and the rest of human life. [citation needed] In human embryonic stem cells (hESCs)s, p53 is maintained at low inactive levels. [31] This is because activation of p53 leads to rapid differentiation of hESCs. [32]
In the field of genetics, a suicide gene is a gene that will cause a cell to kill itself through the process of apoptosis (programmed cell death). Activation of a suicide gene can cause death through a variety of pathways, but one important cellular "switch" to induce apoptosis is the p53 protein.
An example is the p53 gene, which suppresses cancer but also suppresses stem cells, which replenish worn-out tissue. [13] Unfortunately, the process of antagonistic pleiotropy may result in an altered evolutionary path with delayed adaptation, in addition to effectively cutting the overall benefit of any alleles by roughly half. However ...
Germline stem cells (GSCs) are found in organisms that continuously produce sperm and eggs until they are sterile. These specialized stem cells reside in the GSC niche, the initial site for gamete production, which is composed of the GSCs, somatic stem cells, and other somatic cells.
P53 diverged from p63/p73 with a gene duplication in the cartilaginous fish. [7] P63 and p73 differentiated from each other in bony fish. [ 7 ] In vertebrates, p53 began the role of protecting the somatic cells and acting as a tumor suppressor.
The p53 upregulated modulator of apoptosis (PUMA) also known as Bcl-2-binding component 3 (BBC3), is a pro-apoptotic protein, member of the Bcl-2 protein family. [5] [6] In humans, the Bcl-2-binding component 3 protein is encoded by the BBC3 gene. [5] [6] The expression of PUMA is regulated by the tumor suppressor p53.
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Induced pluripotent stem cells are similar to natural pluripotent stem cells, such as embryonic stem cells, in many aspects, such as the expression of certain stem cell genes and proteins, chromatin methylation patterns, doubling time, embryoid body formation, teratoma formation, viable chimera formation, and potency and differentiability, but ...