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
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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
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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
Pancreatic intraepithelial neoplasias (PanINs) show progressive stages of neoplastic growth that are precursors to pancreatic adenocarcinomas. The onset of Normal duct, PanIN-1A/PanIN-1B and PanIN-3 lesions are reproduced above. Figure taken from Nature Reviews Cancer 2, 897-909 (December 2002) | doi:10.1038/nrc949
In particular, perineural invasion has a crucial role in the local recurrence of disease after surgery. Perineural space is known to be an important route of pancreatic cancer invasion. Pancreatic cancer cells invade the neural plexus distributed in pancreatic parenchyma and spread through perineural space to reach extra-pancreatic nerves, such as the celiac plexus or the supra-mesenteric artery plexus. Cancer cell invasion into the neural plexus often results in non-curative resection and, therefore, retroperitoneal recurrence (Kenmotsu, 1990, Kameda et al., 1990).
A single cancer cell develops and multiplies quickly, turning into a tumor that does not regard ordinary limits in the body. In the end, cells from the tumor travel somewhere else in the body through the blood or lymphatic framework. Nobody knows precisely how the procedure of DNA harm prompting pancreatic disease happens. Dissecting pancreatic diseases removed by surgery demonstrates certain transformations that happen in about all cases, and others that vary between individuals. Some of these changes happen arbitrarily. Others happen because of things we do or involvement in the earth. A few mutations might be inherited. At the point when enough mutations add up, a cell gets to be threatening and a tumor starts to
According to Professor John Neoptolemos, "There are approximately 7,000 new cases each year - but it is one of the most lethal cancers." The main reason for the low survival rate from pancreatic cancer is due to its difficulty in finding this cancer early. By the time a person has symptoms, the cancer has often reached a large size and spread to other organs. Because the pancreas is deep inside the body, the doctor cannot see or feel tumors during a routine physical exam. There are currently no blood tests or other tests that can easily find this cancer early in people without symptoms. Tests for certain genes in people with a family history of the disease can help tell if they are at higher risk for cancer. There are some new tests for finding pancreatic cancer early in people with a strong family history of the disease, but these tests are complicated and expensive. Some symptoms of pancreatic cancer include jaundice, a yellow color of the eyes and skin caused by a substance buildup in the liver, pain in the belly area or in the middle of the back, significant weight loss over a number of months, loss of appetite, digestive problems including nausea, vomiting, pain that tends to be worse after eating, a swollen gallbladder that is enlarged, blood clots that form in the veins or cause problems with fatty tissue under the skin, and diabetes. If the doctor has any reason to suspect pancreatic cancer, certain tests will be done to see if the disease is really
This is because the pancreas is located deep in the belly just in front of the spine. As time goes on these cancers cells being to grow much bigger and when they do, they start causing different symptoms depending on the location of the cancer within the pancreas, by the time symptoms are noticed, they have grown and spread throughout the body. Easily identified symptoms are formed when tumor is already large enough to press on other organs of the body, some of these symptoms might include: jaundice which is caused by buildup of bilirubin, abdominal pain which is caused as a result of the cancer pressing on nearby organs, lack of appetite and pale greasy stools resulting when fatty foods are not being digested because cancer blocked the release of pancreatic juice into the intestine. Pancreatic cancer sometimes press on the far end wall of the stomach making it partly blocked thereby making food very hard to get through resulting in Nausea and vomit. Some other symptoms that might be hard to detect include gallbladder enlargement which can only be detected by imaging test, blood cloth and fatty acid
Approximately 20% of pancreatic cancer is found to be operable or resectable. The complete resection of the primary lesion is best treatment for patients with localized pancreatic cancer. However the risk of both local and distal recurrence is high in following resection. In early stage pancreatic cancer the complete resection are associated with considerable morbidity in 40–60% of patients and mortality in less than 3% of patients (Sohn et al., 2000; Winter et al., 2006). Moreover, it takes 2–3 months for complete recovery to a normal quality of life. Although the 5-year survival rate of resected pancreatic cancer is approximately 20% and the median overall survival time is 17–27 months (Winter et al., 2006).
Pancreatic Cancer Axia College (2009) Pancreatic cancer is an abnormal, uncontrolled growth of the cells in the pancreas, which is a digestive gland located behind the stomach. The pancreas is both an endocrine and exocrine gland. Cancer of the exocrine pancreas is more common than cancerof the endocrine pancreas. Pancreaticcancer is the fourth leading cause of cancer related deaths among men and women. Pancreatic cancer remains both a challenge to diagnose and even a greater challenge to treat effectively. What is the pancreas? The pancreas is a spongy, tube-shaped organ about six inches long. The pancreas is located in the back of the abdomen, behind the stomach. The head of the pancreas is on the right side of the abdomen. The
In addition to the treatment, most people with pancreatic cancer need to manage their pain. Some of the treatments often need to be combined if their cancer has advanced to later stages. After confirming the cancer’s presence, you have several options:
Subsequent experimentation has shown DEK overexpression to share a positive correlation with the size and grade of tumors [22]. Further studies indicated that the DEK protein expression pathway is very similar to that of the Ki - 67 antigen, as a marker of cell division and progression in most human carcinomas. Continued investigation indicated that late stage colorectal carcinoma patients that would develop a high DEK expression, and thusly, experienced lower survival rates than their counterparts with low DEK expression. For this study IHC staining in western blot analysis indicated that a higher DEK protein expression was much more common in colorectal tissues than in coinciding normal colorectal mucosa, leading to DEKs potential
This year, an estimate of 53,070 adults, have been or will be diagnosed with pancreatic cancer. (27,670 men and 25,400 women). Pancreatic cancer is the ninth most common cancer in women. Pancreatic cancer should have the most attention because doctors still don’t know how to diagnose this type of cancer yet. The main problem is cost-effective screening tests that easily and reliably find early-stages of pancreatic cancer in people, sometimes show no symptoms.Often “times it is” not found until later stages when the cancer can no longer be surgically removed and has spread from the pancreas to other parts of the body. ("Pancreatic Cancer: Statistics", 2017)
Cancer occurrs by the production of multiple mutations in a single cell that causes it to proliferate out of control. Cancer cells often different from their normal neighbors by a host of specific phenotypic changes, such as rapid division rate, invasion of new cellular territories, high metabolic rate, and altered shape. Some of those mutations may be transmitted from the parents through the germ line. Others arise de novo in the somatic cell lineage of a particular cell. Cancer-promoting mutations can be identified in a variety of ways. They can be cloned and studied to learn how they can be controlled.
Aim 1 - Determine the specific genetic aberrations that accompany primary and secondary tumorigenesis, and if these genetic changes are consistent across affected individuals.
Pancreatic cancer is one of the deadliest types of cancer. The cancer is normally not found till it's in the further stages. Pancreatic cancer is when tumors are formed in the pancreas. There are two types of Pancreatic cancer,endocrine and endocrine tumors.Exocrine is the most common type of pancreatic cancer. The main type of Exocrine tumor is Pancreatic adenocarcinoma. About 95% of exocrine tumors are pancreatic adenocarcinoma. This type of cancer usually begins in the ducts of the pancreas. Endocrine tumors and uncommon and make up less than 4% of pancreatic cancer. They both occur in people over 40, and a little more common in men. Pancreatic cancer cause is still unknown, research shows that damage to the DNA can be a cause. It is also
They analyzed the genetic profiles of these patients to study a concept known as the “double-hit hypothesis”, which is a widely accepted theory in the field of cancer.
The lung cancer cells especially in non-small cell lung cancer (NSCLC) are the primary target cells for this study. In addition to the lung cancer cells, the human breast cancer cells and pancreatic cancer cells are selected for the study in order to compare and confirm the similar activities of the gene expression and mechanism that induce these cancers.