TP53 protein acts as a tumor suppressor, which means that it regulates cell division by keeping cells from growing and dividing (proliferating) too fast or in an uncontrolled way.
The p53 protein is located in the nucleus of cells throughout the body, where it attaches (binds) directly to DNA. When the DNA in a cell becomes damaged by agents such as toxic chemicals, radiation, or ultraviolet (UV) rays from sunlight, this protein plays a critical role in determining whether the DNA will be repaired or the damaged cell will self-destruct (undergo apoptosis). If the DNA can be repaired, p53 activates other genes to fix the damage. If the DNA cannot be repaired, this protein prevents the cell from dividing and signals it to undergo apoptosis. By stopping cells with mutated or damaged DNA from dividing, p53 helps prevent the development of tumors.
Because p53 is essential for regulating DNA repair and cell division, it has been nicknamed the “guardian of the genome.”
The p53 tumor suppressor is a
transcription factor that contains a single zinc ion near its DNA binding interface. Zn2+ is required for site-specific DNA binding and proper transcriptional activation. In addition to its functional significance, zinc plays a dominant role in determining whether p53 folds productively or misfolds.
This gene plays a particularly dominant role in human health. The p53 tetramer coordinates a single Zn2+ in each of its four identical subunits. In response t
o DNA damage, telomere degradation, or other oncogenic stress signals, p53 activates transcription of genes involved in cell cycle arrest, DNA repair, apoptosis, and senescence. It can also enter mitochondria and promote apoptosis by a transcription-independent mechanism. Given the fact that p53 directs these numerous response pathways, it is not surprising that loss of p53 function leads to uncontrolled cell growth. p53 is the single
most frequently mutated protein in human cancer.
Ionofor Zinc replenishment, p53 tumor suppressor gene activation within cells.
Using the IONOFORCE TECHNOLOGY, zinc is able to penetrate the cell’s double lipid layer with the help of quercetin and other flavonoids and reach the nucleus, where it is an essential fuel for the p53 tumor suppressor protein.
Further information: www.medpublics.com
Restoring p53 active conformation by zinc increases the response of mutant p53 tumor cells to anticancer drugs. Full text
Monocytic Leukemia Zinc Finger (MOZ) Interacts with p53 to Induce p21 Expression and Cell-cycle Arrest. Full text
Tumor suppressive BTB/POZ zinc-finger protein ZBTB28 inhibits oncogenic BCL6/ZBTB27 signaling to maintain p53 transcription in multiple carcinogenesis. Full text
The beneficial effect of Zinc(II) on low-dose chemotherapeutic sensitivity involves p53 activation in wild-type p53-carrying colorectal cancer cells. Full text
Metalloregulation of the tumor suppressor protein p53: zinc mediates the renaturation of p53 after exposure to metal chelators in vitro and in intact cells. Full text
Due to their chemical properties, cyclodextrins are able to deliver the linked molecule with a much greater efficiency to the medium where they originally have a reduced absorption capacity.