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Tp53 Pancreatic Cancer

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Pancreatic cancer is a major disease that up to present times has a very high mortality and progression rate which is because it presents very late in its course and most has already metastasized before clinical diagnosis. This makes it difficult to treat.
Pancreatic cancer is of two origins; the exocrine and neuroendocrine origin, 85% of cases seen are from the exocrine origin (pancreatic ductal carcinoma).
The genetic variations seen in various pancreatic ductal cancer has given insight to how to diagnose and treat. There are 4main genes seen in most pancreatic cancer; Kras, CDKN2A, TP53, SMAD4 (1), the understanding of this main genes has given insight into the diagnosis and treatment of PC.
Moreover, there are other minor pathways that …show more content…

The normal function of the p53 gene is to bind to other genes like miRNA34a (which codes for p21)(3). P21 is a protein that acts as signal for the shut of DNA replication, so mutation in P53 causes no direct signal to the p21 gene and there is uncontrolled growth and proliferation.
CDKN2A: it is a tumoursuppressor gene that regulates G1-S phase of the cell cycle(4), in pancreatic tumour the CDKN2A gene has undergone inactivation which leads to unregulated and uncontrolled growth and differentiation.
SMAD4: this gene is responsible for transmitting of chemical signals from the cell surface of TGFb pathway. TGFB attaches to the cell surface sends signals to turn on the SMAD4 gene which complex with other proteins and sends signals into the nucleus to regulate the growth and proliferation of specific areas in …show more content…

MiR-21 has been found to be over expressed in 20 pancreatic carcinoma tissues and cell lines compared to normal tissue or cell lines. (15) PANCREATIC NEUROENDOCRINE TUMORS (PANnet)
Most pancreatic neuroendocrine tumours show great phenotypic and genotypic heterogenicity, they also occur sporadic or familial tumours in association with other familial diseases like multiple endocrine neoplasia type 1(MEN1),vonhippellindaudisease(VHL) or tuberous sclerosis(10,14)
GENETIC VARIATION OF PANCREATIC NEUROENDOCRINE TUMOR
Yuchen Jiao et al carried out an experiment to determine the genetic basis of PANnet, in this research they discovered that 44% of the tumours had somatic mutations in MEN1 gene,43% had mutation in the DAXX(death domain associated protein) and ATRX gene, they also found 14% mutation in mTOR

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