{"id":32624,"date":"2023-03-30T00:01:46","date_gmt":"2023-03-30T04:01:46","guid":{"rendered":"https:\/\/beyondpesticides.org\/dailynewsblog\/?p=32624"},"modified":"2023-03-30T12:31:35","modified_gmt":"2023-03-30T16:31:35","slug":"research-further-associates-widespread-atrazine-exposure-to-breast-cancer","status":"publish","type":"post","link":"https:\/\/beyondpesticides.org\/dailynewsblog\/2023\/03\/research-further-associates-widespread-atrazine-exposure-to-breast-cancer\/","title":{"rendered":"Research Further Associates Widespread Atrazine Exposure to Breast Cancer"},"content":{"rendered":"

(Beyond Pesticides, <\/em>March 30, 2023) A study published in\u00a0Ecotoxicology and Environmental Safety<\/em><\/a>\u00a0finds that the commonly used herbicide, atrazine, promotes breast cancer development through suppression of immune cell stimulation, and thus function, and upregulation of enzymes mediating tumor development. According to the Centers for Disease Control and Prevention (CDC), breast cancer is a disease that causes breast cells to grow out of control, with the type of breast cancer depending on the cells themselves. Several\u00a0studies and reports<\/a>, including U.S. Environmental Protection Agency (EPA) data, identify hundreds of chemicals as influential factors associated with breast cancer risk.<\/p>\n

Breast cancer is the most common cancer among women, causing the second most cancer-related deaths in the United States. Past studies suggest genetic inheritance factors influence breast cancer occurrence. However, genetic factors only play a\u00a0minor role<\/a> in the incidence of breast cancer, while exposure to external environmental factors (i.e., chemical exposure) appears to play a more notable role. One in ten women will receive a breast cancer diagnosis, and genetics\u00a0<\/em>can only account for five to ten percent of cases. There are grave concerns over exposure to endocrine (hormone) disrupting chemicals and pollutants that cause adverse health effects. Therefore, advocates point to the need for national policies to reassess hazards associated with disease development from exposure to chemical pollutants. The study notes, \u201cThis study demonstrated that atrazine accelerated the cell cycle and encouraged the proliferation and invasion of breast cancer tumor cells. Furthermore, atrazine can reduce anti-tumor immunity by decreasing lymphocyte infiltration and modulating cytokine production inside the tumor microenvironment, thereby promoting tumor immune escape and breast cancer progression. To fully understand the mechanism underlying atrazine’s immunosuppression of breast cancers, further research is needed.\u201d<\/p>\n

Beyond cancer, atrazine is a notoriously toxic herbicide known to cause different health issues, including skin and respiratory diseases, cancer, and kidney\/liver damage. Therefore, it is essential to understand how external stimuli\u2014like environmental pollution from pesticides\u2014can drive breast cancer development.<\/p>\n

The researchers examine how exposure to atrazine impacts 4T1 breast cancer cell development, facilitating tumor metastasis (spread from the primary site of origin into different parts of the body) and angiogenesis (the formation of new blood vessels to support tissue growth). Exposure to atrazine significantly increases breast cancer cell spread, tumor size, and the expression\/upregulation of MMPs (matrix metalloproteinases) enzymes, mediating precursor tumors to breast cancer. The percentage of lymphocytes in the thymus and spleen responsible for coordinating the immune response by stimulating other immune cells (CD4 + and CD3) are lower in atrazine exposure cohorts, with the CD4 + \/CD8 + immune cell ratio lower than control groups. The abundance of CD4 + and CD8 + lymphocytes that infiltrate tumors decreases, suggesting atrazine\u2019s suppression of the local and systemic immune function on tumors and upregulation of tumor growth promotes breast cancer development.<\/p>\n

The connection between pesticides and associated cancer risks is nothing new.\u00a0Several studies<\/a>\u00a0link pesticide use and residue to various cancers, from more prevalent forms like\u00a0breast cancer<\/a> to rare forms like kidney cancer nephroblastoma\u00a0<\/em>(Wilms\u2019 tumor). The link between agricultural practices and pesticide-related illnesses is stark, with over 63 percent<\/a>\u00a0of commonly used lawn pesticides and\u00a070 percent<\/a> of commonly used school pesticides showing links<\/a>\u00a0to cancer. Past research demonstrates the mechanism by which cancer can develop after pesticides enter the bloodstream. An\u00a0experimental study<\/a>\u00a0showed that pesticide exposure produces reactive oxygen species (ROS), which are highly unstable and cause potential DNA and cell damage that propagates cancer development. Additionally, pesticides can increase cancer risk through\u00a0alternate mechanisms<\/a>, including genotoxicity (gene damage), epigenetics (gene expression), immunotoxicity, tumors, and endocrine (hormone) disruption.<\/p>\n

Research\u00a0demonstrates<\/a>\u00a0that endocrine disruption is prevalent among many pesticide products like herbicides, fungicides, insecticides, and pesticide manufacturing by-products or contaminants like\u00a0dioxin<\/a>\u00a0(TCDD). These chemical ingredients can enter the body, disrupting hormones and causing adverse developmental, disease, and reproductive problems.<\/p>\n

Regarding atrazine, EPA registers the pesticide as a restricted-use, and only certified pesticide applicators can use the chemical because of its effects on health and ecology. However, encountering pesticides can happen at any point during the pesticide\u2019s production, transportation, storage, or application. The general population mainly encounters atrazine through drinking water, as reports of\u00a0atrazine<\/a>\u00a0contamination demonstrate the chemical\u2019s widespreadcontamination of waterways (e.g., rivers, streams, surface\/groundwater). However, licensed pesticide applicators may also encounter atrazine via inhalation during crop treatments. Furthermore, atrazine can volatilize into the atmosphere by up to 14 percent of the applied volume during treatments.<\/p>\n

Hormone-related cancers have ties to endocrine disruption and immune disruption. The endocrine and immune systems transmit signals to one another as multiple immune processes are involved in endocrine diseases. Thus, hormones generated by the endocrine system greatly influence breast cancer and other hormonal cancer (e.g., prostate, thyroid, etc.) incidents among humans. Although most types of breast cancers are hormonally responsive and thus dependent on the synthesis of either estrogen, progesterone, or too much of the protein called\u00a0HER2<\/a>, G protein-coupled estrogen receptors (GPERs) regulate estrogen through non-genetic cellular pathways, forgoing attachment to standard molecular receptors, leading to triple-negative breast cancer (TNBC).\u00a0Triple-negative breast cancer<\/a>\u00a0has a higher rate of recurrence and worse clinical outcomes than other breast cancers. Xenoestrogens, like atrazine (external estrogen and synthetic compounds sources), can stimulate\u00a0GPER upregulation<\/a>\u00a0and activation in cancer cells. However, although the connection between pesticides and associated cancer risks is nothing new, this study demonstrates the upregulation of MMP enzymes in cancer cells (4T1-Luc) associated with breast cancer development. The researchers consider these cancer cells ideal models to study the immune mechanisms, especially for TNBC, as the cells in TNBC lack receptors for estrogen or progesterone hormones, as well as limited HER2 protein occurrence, and TNBC does not respond to hormonal therapy medicines or medicines that target the HER2 protein.<\/p>\n

Cancer is a leading cause of death worldwide. Hence,\u00a0studies<\/a>\u00a0concerning pesticides and cancer help future epidemiologic research understand the underlying mechanisms that cause cancer. With far too many diseases in the U.S. associated with pesticide exposure, eliminating pesticide use is critically important to the safeguarding of public health and addressing cost burdens for local communities. Beyond Pesticides\u2019\u00a0Pesticide-Induced Diseases Database<\/a>\u00a0(PIDD) is a vital resource for additional scientific literature that documents elevated cancer rates and other chronic diseases and illnesses among people exposed to pesticides. This database supports the clear need for strategic action to shift away from pesticide dependency. For more information on the multiple harms of pesticide exposure, see PIDD pages on\u00a0breast cancer<\/a>,\u00a0endocrine disruption<\/a>, and other diseases.<\/p>\n

Proper prevention practices like\u00a0buying<\/a>,\u00a0growing<\/a>, and supporting organic can eliminate exposure to toxic pesticides. Organic agriculture has many\u00a0health<\/a>\u00a0and\u00a0environmental<\/a>\u00a0benefits, which curtail the need for chemical-intensive agricultural practices. For more information on how organic is the right choice for farmers and consumers , see the Beyond Pesticides webpage,\u00a0Health Benefits of Organic Agriculture<\/a>.\u00a0<\/p>\n

All unattributed positions and opinions in this piece are those of Beyond Pesticides.<\/em><\/p>\n

Source: Ecotoxicology and Environmental Safety<\/em><\/a>\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"

(Beyond Pesticides, March 30, 2023) A study published in\u00a0Ecotoxicology and Environmental Safety\u00a0finds that the commonly used herbicide, atrazine, promotes breast cancer development through suppression of immune cell stimulation, and thus function, and upregulation of enzymes mediating tumor development. According to the Centers for Disease Control and Prevention (CDC), breast cancer is a disease that causes breast cells to grow out of control, with the type of breast cancer depending on the cells themselves. Several\u00a0studies and reports, including U.S. Environmental Protection Agency (EPA) data, identify hundreds of chemicals as influential factors associated with breast cancer risk. Breast cancer is the most common cancer among women, causing the second most cancer-related deaths in the United States. Past studies suggest genetic inheritance factors influence breast cancer occurrence. However, genetic factors only play a\u00a0minor role in the incidence of breast cancer, while exposure to external environmental factors (i.e., chemical exposure) appears to play a more notable role. One in ten women will receive a breast cancer diagnosis, and genetics\u00a0can only account for five to ten percent of cases. There are grave concerns over exposure to endocrine (hormone) disrupting chemicals and pollutants that cause adverse health effects. Therefore, advocates point to the need for national […]<\/p>\n","protected":false},"author":2,"featured_media":32627,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[72,84,527],"tags":[],"class_list":["post-32624","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-atrazine","category-breast-cancer","category-womens-health"],"yoast_head":"\nResearch Further Associates Widespread Atrazine Exposure to Breast Cancer - Beyond Pesticides Daily News Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/beyondpesticides.org\/dailynewsblog\/2023\/03\/research-further-associates-widespread-atrazine-exposure-to-breast-cancer\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Research Further Associates Widespread Atrazine Exposure to Breast Cancer - Beyond Pesticides Daily News Blog\" \/>\n<meta property=\"og:description\" content=\"(Beyond Pesticides, March 30, 2023) A study published in\u00a0Ecotoxicology and Environmental Safety\u00a0finds that the commonly used herbicide, atrazine, promotes breast cancer development through suppression of immune cell stimulation, and thus function, and upregulation of enzymes mediating tumor development. According to the Centers for Disease Control and Prevention (CDC), breast cancer is a disease that causes breast cells to grow out of control, with the type of breast cancer depending on the cells themselves. Several\u00a0studies and reports, including U.S. Environmental Protection Agency (EPA) data, identify hundreds of chemicals as influential factors associated with breast cancer risk. Breast cancer is the most common cancer among women, causing the second most cancer-related deaths in the United States. Past studies suggest genetic inheritance factors influence breast cancer occurrence. However, genetic factors only play a\u00a0minor role in the incidence of breast cancer, while exposure to external environmental factors (i.e., chemical exposure) appears to play a more notable role. One in ten women will receive a breast cancer diagnosis, and genetics\u00a0can only account for five to ten percent of cases. 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