Lindsey Yee
Berg
Bio 110
22 July 2015
The Effects of Hormones on Breast Cancer
Breast cancer is a popular disease that many people are afraid of. It is the growth of altered genes that create malignant tumors starting in a female or male’s breast tissue. Cancer has a reputation of being caused by hormones, but that may not always be the case. Hormones are chemicals that work as chemical messengers in the body and affect the duties of cells and tissues. The ovaries in premenopausal and postmenopausal women usually produce the hormones, like estrogen and progesterone. The hormone estrogen develops and maintains the female sex features and progesterone have to do with women 's menstrual cycle and pregnancy. In a breast cancer cell, it
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Like the Nurses’ Health Study, in 2002, a study called the Women’s Health Initiative published a theory that the breast cancer rates in the U.S decreased because of the reduced use of HRT. The results showed that HRT increased breast cancer risk (Breast Cancer Infographic). Because estrogen promotes the growth of cancers that are hormone-receptor positive, HRT is not a treatment for cancer but increases the risk of cancer because it is used to increase estrogen levels and hormone therapy blocks and lowers estrogen levels (The American Cancer Society) (Armstrong). The second therapy is hormone therapy. This therapy is said to treat breast cancer but is not used alone. Hormone therapy is usually paired with chemotherapy or radiation. Hormone therapy slows or stops the growth of hormone-sensitive tumors by preventing the production of hormones (National Cancer Institute). Breast cancer has cells with hormone receptor- positive. Estrogen makes hormone-receptor-positive breast cancers grow by reducing the amount of estrogen one can reduce the risk of hormone-receptor-positive breast cancers coming back (Armstrong). The most common hormone therapy drug that blocks estrogen development is Tamoxifen. This drug (often a pill) stops the hormone from binding to the breast cancers cells, ultimately preventing the cell to divide and
Generally speaking, throughout the United States, Cancer is a public health concern that has a significant impact amongst both men and women. At the same time, Breast Cancer indicates development of a tumor from cells in the breast known as a malignant tumor. Breast Cancer can begin at two different points, either the cells of the lobules, that are milk-producing glands, or the ducts, a channel draining milk from the lobule to the nipple (“What is Breast Cancer,” 2016). Specifically speaking about Breast Cancer among women, according to the Center for Disease Control and Prevention (2016), it is the most common cancer, regardless of ethnicity or race. Under those
Breast cancer is the second most common cancer in American women (Centers for Disease Control and Prevention, 2017). However, regular screening and mammograms can help reduce the mortality rates of breast cancer patients (LaPorta, et al., 2017). Signs and symptoms of breast cancer may include lumps, abnormal changes to the nipple, abnormal discharge from the nipple, or change in color of the breast or part of the breast (Asuquo and Olajide, 2015). There are many factors that can put women at risk of developing breast cancer, the two most common being growing older and being female (Centers for Disease Control and Prevention, 2017). Other risk factors can include things such as a
Breast Cancer is a type of cancer where in the breast cells growth are uncontrolled. To enhance our understanding of breast cancer, knowing how any cancer can develop is crucial. Cancer develops as a result of the alteration of the genes, or abnormal changes in the genes accountable for managing the growth of the cells and maintaining their health. In each nucleus, the genes operates as the “control room.” The cells in our bodies replace themselves through a process called cell growth in which the
Another factor that contributes to the development of breast cancer is actually the hormone estrogen. This seems unusual because estrogen is a hormone that is essential to the bodies of women in various ways. Estrogen is necessary for normal growth and development of breasts and reproductive organs, as well as for the maintenance of a healthy heart and bones. However, lifetime estrogen exposure may increase a woman’s risk of developing breast cancer. It does not actually produce the mutation in the DNA, nevertheless Estrogen stimulates the proliferation of breast cells that already contain a mutation. These mutated cells will continue to reproduce and have an increased chance of becoming cancerous.
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
To grow and reproduce, breast cancer cells require the female hormone estrogen. Tamoxifen is an "anti-estrogen" and works by competing with estrogen to bind to estrogen receptors in breast cancer cells. Tamoxifen is formally known as a selective estrogen receptor modulator (SERM). By blocking estrogen in the breast, tamoxifen helps slow the growth and reproduction of breast cancer cells. While tamoxifen fights estrogen in breast cancer cells, it also mimics the positive effects of estrogen in other body systems. Post-menopausal women who take tamoxifen may decrease their risk of heart disease or osteoporosis (a degenerative bone disease) without having to use hormone replacement therapy (HRT ).
Breast cancer is a leading cause of death of women, secondary only to heart disease. Breast cancer will affect one of every eight women or approximately 12% of the population. In 2016 there are 246,660 new cases of invasive breast cancer that will be diagnosed as well as 46,000 cases of breast cancer in situ in women. Additionally, there are 2,600 cases of breast cancer that will be found in men. Breast cancer rates have been decreasing since the year 2000. This is thought to be partially due to increased screening measures as well as discontinuing the use of hormone replacement therapy. There was as positive link established between hormone therapy
* Hormonal Therapy: Some cancers need hormones to grow, used to block cancer cells from getting hormones to grow.
One treatment is chemotherapy. Chemotherapy uses drugs to kill cancer cells but can cause side effects of nausea, hair loss, early menopause, hot flashes, fatigue and temporarily lower blood counts. Another treatment is hormone therapy. Hormone Therapy prevents hormones, especially estrogen, from helping cancerous cells in the breast grow and spread. A third treatment, biological therapy, uses the immune system to destroy the cancer cells.
Such findings, all of which relate to hormone-based life events, suggest that breast cancer is somehow affected by prolonged exposure to female sex hormones, such as estrogen. Women with a history of breast cancer in the family are also at greater risk. About five percent of all breast cancers have been attributed to a mutated, or structurally altered, gene known as BRCA1. Mutations in a second gene, BRCA2, contribute significantly to the development of breast cancer in Jewish women. Alcohol, high levels of fat in the diet, and not exercising regularly have also been linked to increased risk for breast cancer (Garber).
In most cases, breast cancer initially develops as hormone-dependent cancer, in which growth and progression of the disease correlates with estrogen levels.
There is many risk factors that have an increase in a woman to develop breast cancer, but it is not yet known what are the risks to develop cancerous cells. Therefore, there is a possibility that
Today in the world there are many different types of reproductive cancers. A reproductive cancer I’m going to be writing about is Breast cancer. Yes, its Breast Cancer. According to American Cancer Society (2017) Breast cancer is “Breast cancer starts when cells in the breast begin to grow out of control. These cells usually form a tumor that can often be seen on an x-ray or felt as a lump. The tumor is malignant (cancer) if the cells can grow into (invade)surrounding tissues or spread (metastasize) to distant areas of the body. Breast cancer occurs almost entirely in women, but men can get cancer too (pg.1). Although Breast cancer first start in the breast, it can also start from other places surrounding that tissue or area.
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.
Breast cancer accounts for one third of all new cancer diagnoses in the United States (Cauley, et al., 2007). The first sign in the process of this disease is a lump that forms around the breasts. For this reason, it is necessary to get the yearly mammograms once a woman reaches a certain age. Also, monthly self-examinations can aid in finding breast cancer early. If this condition is found early enough, chances of survival are abundant. Most women who get breast cancer are older than 50 with 86% of the deaths occurring in this age group (Cauley, et al., 2007). Postmenopausal women have a higher risk for breast cancer, because the risk increases when levels of endogenous estradiol rise (Cauley, et al., 2007). Breast cancer is the most common cancer that occurs in women. This epidemic has a higher incidence rate among white women than in African American women, but African American women have a higher mortality rate (Breast Cancer Risk Factors, 2010). White women are more apt to develop this disease than any other ethnicity. However, in women under 45, breast cancer is more common in African American women (Breast Cancer Risk Factors, 2010).