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Phosphatase and tensin homolog (PTEN) is a phosphatase in humans and is encoded by the PTEN gene. [6] Mutations of this gene are a step in the development of many cancers , specifically glioblastoma, lung cancer, breast cancer, and prostate cancer.
The genetics of the Bannayan–Riley–Ruvalcaba syndrome is determined, in the majority of cases, via the PTEN gene which presents about 30 mutations in this condition. This gene which regulates cell growth, when not working properly can lead to hamartomas. PTEN chromosomal location is 10q23.31, while the molecular location is 87,863,438 to ...
Specifically, it has an important role in tumorigenesis in PTEN-negative cancers. [15] It's reported that interfering with the gene for PI3Kb might be a therapeutic approach for high-risk bladder cancers with mutant PTEN and E-cadherin loss. Specific isoform inhibitors to PI3Kb is a potential treatment for PTEN-deficient cancers. [16]
Many of these mutations cause the kinase to be more active. It is the single most mutated kinase in glioblastoma , the most malignant primary brain tumor. [ 22 ] The PtdIns(3,4,5) P 3 phosphatase PTEN that antagonises PI3K signaling is absent from many tumours.
In 2017, it became the first immunotherapy drug approved for use based on the genetic mutations of the tumor rather than the site of the tumor. It was shown that patients with higher non-synonymous mutation burden in their tumors respond better to the treatment.
Tissue-agnostic cancer drugs are antineoplastic drugs that treat cancers based on the mutations that they display, instead of the tissue type in which they appear. [ 1 ] [ 2 ] [ 3 ] Tissue-agnostic drugs that have been approved for medical use include Pembrolizumab , Larotrectinib , Selpercatinib , Entrectinib , and Pralsetinib .
Phosphatase and tensin homolog (PTEN) antagonises PI3K by converting PI(3,4,5)P 3 into PI(4,5)P 2. Loss of PTEN function leads to over-activation of Akt and is common in cancer cells (PTEN is a tumour suppressor). SH2-containing Inositol Phosphatase (SHIP) also dephosphorylates PI(3,4,5)P 3, at the 5' position of the inositol ring. [22]
PTEN may mean: Prime Time Entertainment Network PTEN (gene) , a human tumour suppressor gene on chromosome 10 (and its protein: phosphatase and tensin homolog)