Peritoneal Mesothelioma Gene Expression May Predict Survival
Scientists in Baltimore believe they may have found a way to predict – and eventually improve – survival in people with malignant peritoneal mesothelioma (MPM).
Peritoneal mesothelioma is a rare cancer of the membranes that line the abdominal cavity. Like other forms of mesothelioma, it is caused by exposure to fibers of the mineral asbestos. While it is almost always fatal, people with peritoneal mesothelioma tend to exhibit very different responses to the disease. Writing in the journal Cancer, the Maryland researchers note, "There is marked variability in its clinical behavior. Some patients die rapidly, and others survive for many years."
The researchers set out to determine reasons for this variability and believe the answer may lie in signaling pathways that tell cancer cells to grow and proliferate. Experimenting on tumor samples from 41 mesothelioma patients, the researchers analyzed the genes expressed by each set of cells. What they found was an important difference in the ‘signaling chemicals' that are responsible for protein synthesis and RNA production inside cells.
In one group, the signaling pathways known as Phosphoinositide-3-kinase (PI3K) and the closely interacting mammalian target of rapamycin (mTOR) were overexpressed. In cases where the genes produced by these pathways were present, the peritoneal mesothelioma patients had survived for a median of 24 months.
But in cases where these pathways, and their corresponding genes, were not found, the mesothelioma patients had a median survival of 69.5 months. To further test their theory that these cell pathways were linked to cancer cell proliferation and prognosis, the researchers used a chemical to inhibit the P13K and mTOR pathways in cell samples. They found that, when these pathways were inhibited, cell signaling and cell proliferation were significantly reduced.
Taken together, the researchers conclude that these two experiments point to the value of analyzing gene expression pathways in patients diagnosed with malignant peritoneal mesothelioma. They write, "Targeting the PI3K and mTOR signaling pathways may have significant therapeutic value in patients with MPM."
The study was conducted by the Division of Surgical Oncology at the University of Maryland School of Medicine in Baltimore and will be published in an upcoming issue of Cancer.
Questions and Answers
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Finding out you have been stricken with Peritoneal Mesothelioma cancer is a shock and after you find out you will have many concerns. What questions should you ask your doctor? Mesothelioma cancer sufferers ask oncologist lots of questions to try understand the illness they have, Mesothelioma treatments, and the cause for the cancer. Mesothelioma victims should ask many questions so they know what is happening with their illness.
Peritoneal mesothelioma is one of the rare forms of mesothelioma cancer that affects individuals who were exposed to asbestos. Of the more than two to three thousand mesothelioma cases reported each year, peritoneal mesothelioma accounts for just over two hundred of these cases.
Asbestos is a natural mineral that was once used in the construction and home improvement industries. It was put on ceilings when it was mixed with aertex, it was used to make surfaces semi flame resistant and it was also mixed with cement as it is very strong. At one point asbestos was seen as a revolution for these industries as it was just so versatile – it was also deadly. No one realised at the time that every time they were exposed to asbestos that they were taking their life in their hand
Malignant peritoneal mesothelioma is a rare form of mesothelioma that attack the lining of abdomen peritoneum. Malignant peritoneal mesothelioma (MPM) is regarded as a universally fatal disease affecting 20% to 30% of mesothelioma cases. It's was first described by Miller and Wynn in year 1908. In the past two decades, the incidence of malignant peritoneal mesothelioma has increased.
Peritoneal mesothelioma treatment is imperative for those who are suffering from this disease.
Peritoneal mesothelioma is a very rare type of cancer. About 300 cases are discovered in the United States yearly, it is about 30 percent of all mesothelioma cases.
Cancer translational research brings together scientists' and clinicians' suggestions to develop solutions to biomedical complications. This kind of applied research strives to offer strategies to questions surrounding the etiology, pathology, diagnosis, prevention and treating cancer.
Orbs are actually a lumpectomy or quadrantectomy combined with rotating the breast tissue or mobilize the flap into the cavity of the surgery time fill is removed. It also includes the comparative change in shape and size is doing in relation to breast and moved if necessary, does not affect the conversion of the breast. The deferred plan the reconstruction is not part of endoplasmic techniques. Both procedures are performed by specific thoracic surgeons.
What every woman fears for is losing her self confidence , losing hope and losing her personality. The term "Breast Cancer" is a very negative word and that it creates negative vibrations in her heart. So, to make her comfortable with the basics of breast cancer and to make her means any woman understand that this type of cancer is the least dangerous than all cancers and that if it is detected early then you will fight with it successfully. Causes, Symptoms, treatment, discussed in detail.
Mesothelioma is a rare cancer that originates in the mesothelium. The mesothelium is the protective lining that covers the body's internal organs. Mesothelioma occurs when the mesothelium cells start to divide uncontrollably.
Chemotherapy is a treatment for killing cancerous cells which is given intravenous or extra-venous to the cancer patient. Even breast cancer patients have to go through the treatment. This treatment mainly focuses on the cancerous cells that are spread in the blood stream in the whole body . If any cancerous cells are there then they are killed by the chemotherapy medicine. The medicine is very costly and it has to be taken for one or two days continuously for every 21 days .
Asbestos fibers are microscopic, though they are also quite durable. For this reason, asbestos was used in a number of different industrial compounds to enhance strength and resistance to temperature extremes- two properties at which the mineral is highly adept.
It has long been known that smoking is hazardous to one's health, causing a marked increase in instances of mesothelioma lung cancer among those who smoke regularly.
Exposure to asbestos particles is one of the principal causes of mesothelioma cancer, also known as asbestos cancer. As a naturally occurring mineral with useful commercial applications, asbestos is found in plumbing, insulation and other building materials and products.
There are several risk factors that increase the likelihood that a person will develop mesothelioma.
Mesothelioma Information – Basics Mesothelioma is a type of cancer that is usually caused by previous exposure to asbestos.
