Breast Cancer
Disease Overview Breast cancer is a disease in which certain cells in the breast become abnormal and multiply uncontrollably to form a tumor. Breast cancer is the second most commonly diagnosed cancer in women. (Only skin cancer is more common.) About one in eight women in the United States will develop invasive breast cancer in her lifetime. Researchers estimate that more than 230,000 new cases of invasive breast cancer will be diagnosed in U.S. women in 2015. Cancers occur when a buildup of mutations in critical genes—those that control cell growth and division or repair damaged DNA—allow cells to grow and divide uncontrollably to form a tumor. Breast cancer can be caused by inherited genetic factors. These genetic
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By helping to repair DNA, the BRCA2 protein plays a critical role in maintaining the stability of a cell 's genetic information. The cancer risk caused by BRCA2 mutations is inherited in a dominant fashion, even though usually only one mutated allele is directly inherited. This is because people with the mutation are likely to acquire a second mutation, leading to the dominant expression of the cancer. A mutated BRCA gene can be inherited from either parent. Because they are inherited from the parents, they are classified as hereditary or germline mutations. Because humans have a diploid genome, each cell has two copies of the gene (one from each biological parent). Typically only one copy contains a disabling, inherited mutation, so the affected person is heterozygous for the mutation. If the functional copy is harmed, however, then the cell is forced to use alternate DNA repair mechanisms, which are more error-prone. The loss of the functional copy is called loss of heterozygosity (LOH). Any resulting errors in DNA repair may result in cell death or a cancerous transformation of the cell. Disease Pathology High-risk families include those whose members carry a mutation in the BRCA2 gene. The mutated BRCA2 gene is inherited in an autosomal dominant pattern. A child needs to inherit just one copy of the mutated gene to have an increased cancer risk. Children who have a parent with a BRCA2
When I was given this ancestry project I automatically knew I wanted to figure out my family genetics and why I got cancer in the first place. I am the only child out of four in my family to get cancer. After digging into some history I found out that my mom, grandma, and uncle had cancer. It's weird how genetics work but I was basically doomed from the beginning. My grandma had breast cancer and had both her breasts removed. My uncle had stage four lung cancer and passed away shortly after diagnosis. And my mom had thyroid cancer only a few years ago and is a survivor. Since there is history of breast cancer in my family I had to get tested for the BRCA1 and BRCA2 gene, which is a mutated gene that is inherited from your family. This gene increases your risk of developing breast cancer to 50%, a one in two
Familial melanoma is a genetic or inherited condition. This means that the risk of having a melanoma can be passed from generation to generation in a family. Ordinarily, each cell has two copies of each gene: one inherited from the mother and one inherited from the father. Familial melanoma follows a dominant inheritance pattern, in which case a mutation happens in only one copy of the gene. As every cell has two copies of each gene, it means that a parent can potentially pass along a copy of his or her normal gene or a copy of the mutated gene. Therefore, a child who has a parent with a mutation has a 50% chance of inheriting that mutation. A related person such as a brother or a parent of the person who has a mutation also has a 50% chance of having the same mutation.
Over the past decade breast cancer has become one of the most predominant diseases in the United States. Breast cancer starts out as a malignant tumor in the tissues of the breast which is formed from the uncontrolled growth of abnormal breast cells. Breast cancer is the most common cancer in women, but it can also appear in men. (Stephan, 2010)
The second similarity is that both BRCA1 and BRCA2 bind to Rad5 protein that is involved in maintain the integrity of the genome (Kinzler et al, 1997).
We have all seen the pink ribbons. They have become a national, if not international symbol for breast cancer support and awareness. Breast cancer knows neither racial boundaries nor age restrictions. Females of all ages and ethnicities can develop breast cancer and it is the leading most common cancer among women. Calling attention to this often fatal disease is important by supporting its victims, families and friends of victims, as well as raising funds for breast cancer research. Though males are not immune from developing a breast cancer, for the purposes of this paper, this paper will be limited to information relating breast cancer in females.
Wilbert zwart, Huub Terra et al (2015) conducted study on cognitive effects of endocrine therapy for breast cancer. The number of breast cancer survivors is gradually increasing and subset of these patients experience long term adverse effects of adjuvant systemic therapy, including cognitive decline surprisingly, relatively little is known about the long term adverse effective of endocrine treatment on cognition. A 75% of all patients with breast cancer are eligible to receive hormonal treatment, understanding the potential Neuro cognitive effect of such therapy is of utmost importance. The decline of cognitive functions can have a detrimental impact on quality of life and might interfere with independent living. This Review discusses the
According to the American Cancer Society, Each year, more than 200,000 women are diagnosed with breast cancer; furthermore Twelve percent of all women will contract the disease, and 3.5% of them will die from breast cancer (American Cancer Society, 2005). There are risk factors that may lead to breast cancer. There are 4 stages of breast cancer and several treatments, although treatments vary from types and stages of breast cancer. Breast cancer is the leading cause of death among women who are 40 to 55 years old (Breast Cancer, 2009).Cancer occurs when cells divide uncontrollably. It changes from a normal cell to cancerous cells that require gene alterations. Therefore the altered genes and the uncontrolled growth may lead to tumors.
When mutations in the genes accumulate over time in multiple genes that are in control of cell proliferation the cells become cancerous ("Cell Division and Cancer"). After this occurs the cells begin to grow and divide rapidly causing lumps called tumors to form ("How cancer starts"). The gene mutations that can cause breast cancer are many. Some common causes include mutations in proto-oncogenes which are genes that assist the cell in growing normally. When they mutate or are too abundant they can activate randomly causing cells to grow and multiply out of control. Another cause is inherited gene changes. These inherited DNA mutations cause increased risk for developing certain types of cancer such as breast cancer. For example those
This is why BRCA-positive people have a higher risk for cancers. It also explains why they get them earlier in life. They were born already having one mutated BRCA allele ready to fuel cancer cells.
Much of how the human body operates is due purely to one’s genetic disposition. This is due to the way proteins are produced. In protein production, DNA is read three base pairs at a time making up for a codon which codes for a specific amino acid. These amino acids are produced in translation, and they will be strung together by something called tRNA to make full proteins. In DNA replication, there are many factors that determine the efficiency and effectiveness of what product is achieved and how it functions. When base pairs are incorrect, are deleted, or extra pairs inserted, what is called a mutation occurs. Mutations often times change the structure of a protein, how it performs, or what protein is produced altogether. They can
A patient with history of breast cancer in the family the cases of breast cancer is attributed to the inheritance of autosomal genes. Thus the chance of genetic inheritance increases if there are
Carcinoma is a cancer that develops from the epithelial cells, which begins in the tissue that lines the outer and inner surface of the body. Breast cancer is a growth of mutated cells that forms in the lobules, the ducts, and also the stromal tissue of the breast. Stromal tissue is the fatty fibrous tissue that holds and supports the breast. The cause of these mutated cells is the change in the genes that is responsible of healthy cell growth. These genes can be inherited from family genetics or the most common way which is the aging process. With this process the healthy cells replace themselves with new ones and the old cells die out, but with family genetics and age these cells no longer die out
Breast cancer is the most prevalent cancer identified in women, and in spite of substantial developments in cancer treatment, it is still the second most important cause of cancer-related deaths. In general, up to 25% of breast cancer patients overexpress HER2 gene. Recently, the mAbs that identify antigens on cancer cells are being used for the targeted therapy of cancer. The antibodies can be used alone or as conjugates for the transport of radioisotopes, toxins, or drugs. Immunotoxins are manufactured by the connection of an antibody to a toxin produced by a plant or a bacteria. In this study, Pseudomonas endotoxin A (PE) and Shiga toxin (STX) and Fv fragments of the anti-ErbB2 mAb herceptin was used to create a single-chain variable
Inherited genetic mutations play a major role in about 5 to 10 percent of all cancers.
One disease that many people associate negative connotation with today is cancer. The statistics tell us that cancer is still one of the leading causes of death today. In 2016, an estimated 1,685,210 new cases of cancer will be diagnosed in the United States and 595,690 people will die from the disease. However, the death rate has been declining as research into treatments has furthered. For example from 2004 to 2013 deaths from cancer has declined by 13%.