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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.
The ability to directly cause apoptosome activation is valuable in cancer therapies because the infected cancerous genes are unable to be destroyed causing a continuation of the cancer to form. By activating the apoptosome by an outside stimulus apoptosis can occur and get rid of the mutated cells.
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. Stimulation or introduction (through gene therapy ) of suicide genes is a potential way of treating cancer or other proliferative diseases.
The absence of p21 or 14-3-3 cannot sufficiently inhibit the CyclinB-Cdc2 complex, thus exhibiting the regulatory control of p53 and p21 in the G2 checkpoint in response to DNA damage. [12] p53 mutations can result in a significant checkpoint deficit, which has important implications in the treatment of cancer.
Apoptosis-stimulating of p53 protein 2 (ASPP2) also known as Bcl2-binding protein (Bbp) and tumor suppressor p53-binding protein 2 (p53BP2) is a protein that in humans is encoded by the TP53BP2 gene. [ 5 ] [ 6 ] [ 7 ] Multiple transcript variants encoding different isoforms have been found for this gene.
The central role of DNA damage and epigenetic defects in DNA repair genes in carcinogenesis. DNA damage is considered to be the primary cause of cancer. [17] More than 60,000 new naturally-occurring instances of DNA damage arise, on average, per human cell, per day, due to endogenous cellular processes (see article DNA damage (naturally occurring)).
It induces apoptosis through a pathway that involves mitochondria but does not rely on the p53 protein or death receptors typically involved in cell death. [7] In healthy cells, apoptin stays in the cytoplasm, but in cancer cells, it moves to the nucleus after being activated by a process called phosphorylation .
Apoptosis regulator BAX, also known as bcl-2-like protein 4, is a protein that in humans is encoded by the BAX gene. [5] BAX is a member of the Bcl-2 gene family . BCL2 family members form hetero- or homodimers and act as anti- or pro-apoptotic regulators that are involved in a wide variety of cellular activities.