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Daily News Blog

Archive for the 'Alzheimers’s' Category


05
Feb

EPA’s Proposed Endocrine Disrupting Pesticide Review Called Deficient

(Beyond Pesticides, February 5, 2024) Public Comment Period Ends February 26, 2024. The U.S. Environmental Protection Agency (EPA) never completed protocol for testing pesticides that disrupt the fundamental functioning of organisms, including humans, causing a range of chronic adverse health effects that defy the common misconception that dose makes the poison (“a little bit won’t hurt you”)—when, in fact, minuscule doses (exposure) wreak havoc with biological systems. After a nearly two decade defiance of a federal mandate to institute pesticide registration requirements for endocrine disruptors, EPA has now opened a public comment period ending February 26, 2024 and advocates are criticizing the agency’s proposed evaluation as too narrow. A detailed examination of EPA’s proposal can be found in draft comments by Beyond Pesticides.  Endocrine disruption as a phenomenon affecting humans and other species has been critically reviewed by many authors. Endocrine disruptors are chemicals that can, even at extremely low exposure levels, disrupt normal hormonal (endocrine) function. Such endocrine disrupting compounds (EDC) include many pesticides, exposures to which have been linked to infertility and other reproductive disorders, diabetes, cardiovascular disease, obesity, and early puberty, as well as attention deficit hyperactivity disorder (ADHD), Parkinson’s, Alzheimer’s, and childhood and adult cancers. EPA […]

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28
Nov

New Federal Law Seeks to Protect Pregnant Workers, Farmworkers at Elevated Risk

With the elevated adverse impacts associated with pesticides and reproductive health, the Pregnant Workers Fairness Act (PWFA) law may be used to improve protections for farmworkers and other high-risk employees.

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24
Aug

Researchers Determine Mechanism of DDT Link to Alzheimer’s, Informing Potential Treatments

(Beyond Pesticides, August 24, 2022) New research is helping the medical community understand the mechanism through which exposure to the banned insecticide DDT increases risk of Alzheimer’s disease. Published in the journal Environmental Health Perspectives, a team of researchers from Florida International University and Rutgers used multiple models to demonstrate the effects of DDT on the production of toxic proteins in the brain. The constant stream of new health risks regarding a chemical banned decades ago underlines the importance of a precautionary approach to pesticide regulation, particularly as red flags are already being raised about the connection between widely used weed killers like glyphosate and neurodegenerative diseases like Alzheimer’s. “The vast majority of research on the disease has been on genetics — and genetics are very important — but the genes that actually cause the disease are very rare,” says study coauthor Jason Richardson, PhD of Florida International University. “Environmental risk factors like exposure to DDT are modifiable. So, if we understand how DDT affects the brain, then perhaps we could target those mechanisms and help the people who have been highly exposed.” Previous research from Dr. Richardson found that DDT exposure increased risk of Alzheimer’s by four times. Scientists […]

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04
Aug

Glyphosate Weed Killer Crosses Blood-Brain Barrier, Linked to Alzheimer’s and Other Neurodegenerative Diseases

(Beyond Pesticides, August 4, 2022) An Arizona State University (ASU) study shows that the popular herbicide glyphosate can infiltrate the brain through the blood (blood-brain barrier), increasing neurological disease risk. The blood-brain barrier filters various molecules entering the brain from the circulatory system. However, the permeation of glyphosate molecules elevates the expression of TNFα and the accumulation of soluble beta-amyloid (Aβ) proteins in the brain and has associations with immune, inflammatory, and neurodegenerative diseases like Alzheimer’s disease (AD). More than 6 million people in the U.S. are living with Alzheimer’s, and cases are expected to double by 2050. Although Alzheimer’s research has focused heavily on finding genetic causes of the disease, fewer than half of cases are genetic. Thus, researchers are now evaluating how environmental contaminants may increase disease risk. Over 300 environmental contaminants and their byproducts, including pesticides, are chemicals commonly present in human blood and urine samples and can increase neurotoxicity risk when crossing the brain barrier. Therefore, studies like this highlight the importance of understanding how chemical accumulation in the body can impact long-term health and disease prognosis. The study notes, “Brain glyphosate correlates with increased TNFα levels, suggesting that exposure to this herbicide may trigger neuroinflammation in the brain, which may […]

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09
Sep

Endocrine (Hormone) Disrupting Chemicals, Including Pesticides, Also Affect the Nervous System

(Beyond Pesticides, September 9, 2021) A new study published in Toxicology Reports finds the same chemicals that disrupt the endocrine (hormone) system also disrupt the nervous system. Endocrine disruptors are xenobiotics (i.e., chemical substances like toxic pesticides foreign to an organism or ecosystem) present in nearly all organisms and ecosystems. The World Health Organization (WHO), European Union (EU), and endocrine disruptor expert (deceased) Theo Colborn, Ph.D., classify over 55 to 177 chemical compounds as endocrine disruptors, including various household products like detergents, disinfectants, plastics, and pesticides. Past research shows exposure to endocrine-disrupting pesticides adversely affects human health, from reproductive function to cancer development, and effects can span generations. However, this study is one of the few to evaluate associations between endocrine-disrupting chemicals and neurological function. Although the etiology (cause) of many sporadic (non-heritable) neurological diseases are unknown, scientists suggest exposure to environmental toxicants plays a role in disease development. Therefore, government and health officials have been urged to consider how exposure to endocrine-disrupting chemicals can impact bodily function and development apart from hormone disruption.   In the body, cells communicate through electrical or chemical signals transmitted within the nervous or endocrine system. Studies find exposure to endocrine-disrupting chemicals has a direct and indirect impact on hormone function and development. However, researchers investigated whether […]

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14
Jun

Cutting Edge Science Must be Considered…See Science and Policy at the National Pesticide Forum 

(Beyond Pesticides, June 14, 2021) Beyond Pesticides reports regularly on new science showing how pesticides harm human health and ecosystems. This science is not factored into EPA decisions. Tell EPA that cutting-edge science must be considered. More than 50 pesticide active ingredients have been identified as endocrine disruptors that mimic the action of a naturally-produced hormone, such as estrogen or testosterone, thereby setting off similar chemical reactions in the body; block hormone receptors in cells, thereby preventing the action of normal hormones; or affect the synthesis, transport, metabolism and excretion of hormones, thus altering the concentrations of natural hormones. Endocrine disruptors have been linked to attention deficit hyperactivity disorder (ADHD), Parkinson’s and Alzheimer’s diseases, diabetes, cardiovascular disease, obesity, early puberty, infertility and other reproductive disorders, childhood and adult cancers, and other metabolic disorders. Similar effects are found in other species. In spite of legal requirements and the flood of research, EPA issues Proposed Interim Decisions (PIDs) on pesticide registrations making no human health or environmental safety findings associated with the potential for endocrine disruption, or identifying additional data needs to satisfy Endocrine Disruptor Screening Program requirements in the PIDs. EPA cannot make findings of no unreasonable adverse effects without findings […]

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19
May

European Union Plans to Propose a 10-year Extension for the Approval of Glyphosate Use

(Beyond Pesticides, May 19, 2017) In spite of a growing body of evidence implicating glyphosate in a wide range of human illnesses and environmental impacts, the European Union (EU) plans to propose a 10-year extension for the approval of glyphosate use. Previously, the European Commission (the Commission), which is in charge of the approval, was forced to issue a limited license extension for the chemical because member states could not reach a consensus. The Commission was holding out for further information on carcinogenicity, which was assessed by the European Chemicals Agency (ECHA), and whose report was issued in March 2017. According to ECHA’s assessment, glyphosate is not carcinogenic. Glyphosate is the active ingredient in Monsanto’s Roundup brand of weed-killers, and research by the World Health Organization’s International Agency for Research on Cancer (IARC) has found that it is a probable human carcinogen. Since IARC’s findings were released, Monsanto has made several efforts to discredit the research of this well respected, international body, including attempting to influence government agencies. According to a Bloomberg BNA article, “The commission will discuss with EU member nations the prospect of a 10-year reauthorization, said Anca Paduraru, spokeswoman for the commission.” Once the Commission proposes the […]

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10
Aug

Major UK Bread Companies, Supermarkets Urged To Stop Using Glyphosate

(Beyond Pesticides, August 10, 2016) In a letter, submitted by the Soil Association, leading bread producers and supermarkets in the United Kingdom (UK) are being urged to cease stocking and selling bread products that  contain traces of the herbicide glyphosate. Glyphosate, the active ingredient in Monsanto’s Roundup, has been classified as a probable human carcinogen by the World Health Organization (WHO) and is linked to numerous other environmental and human health concerns. Glyphosate residues have already been detected in bread, beer, and wine. The Soil Association, a UK organization that campaigns for healthy, humane and sustainable food, farming and land use, is concerned that glyphosate is used on crops immediately before harvest, and subsequently makes its way into food. According to the letter and a spokesperson for the group, “Using glyphosate, and glyphosate-based products, as a pre-harvest treatment is fundamentally wrong, and we are calling for an end to it with our campaign.  Wheat harvest will start in the next few weeks, and we are asking bread companies to act now and put a stop to glyphosate as a pre-harvest desiccant in their supply chains. The EU has just advised glyphosate use as a pre-harvest spray on food crops should […]

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16
May

Exposure to Pesticides Linked to ALS Risk

(Beyond Pesticides, May 16, 2016) Pesticide exposure may increase the risk of amyotrophic lateral sclerosis (ALS), according to a study entitled Association of Environmental Toxins With Amyotrophic Lateral Sclerosis, which was  published in JAMA Neurology. ALS, also known as Lou Gehrig’s disease, is a progressive neurodegenerative disease that affects nerve cells in the brain and spinal cord. The study, which investigated a total of 122 persistent environmental pollutants, including organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), and brominated flame retardants (BFRs), found that pesticide exposure increased ALS risk five-fold. Researchers conducting the study  looked at 156 patients with ALS and 128 without the disease. Participants were asked about occupational and residential exposure to environmental toxicants  and blood samples were taken to measure their concentrations. Researchers found that the organochlorine pesticides pentachlorobenzene and cis-chlordane increased ALS risk two-fold and nearly six-fold, respectively. This study does not prove that pesticides cause ALS, but it does build on an association suggested in previous research, study co-author Stephen Goutman, MD, told  HealthDay. Dr. Goutman recommends avoiding pesticides. This is especially wise for anyone with a family history of ALS, he added. The link between pesticide exposure and neurological damage has been studied extensively. In 2008, […]

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01
Apr

Fungicides Linked to Autism and Alzheimer’s Disease

(Beyond Pesticides, April 1, 2016) A study published yesterday finds  that a certain class of fungicides, the strobilurins, causes genetic changes in the neurons of mice that are similar to genetic changes seen in humans with autism and Alzheimer’s disease. Since their introduction to the market over the past 20  years, these fungicides have been used increasingly on conventionally grown crops like cabbage, spinach, lettuce, kale, tomatoes, apples, pears and grapes. After exposing brain cells from mice to over 300 pesticides and fungicides, researchers found that the strobilurin class of fungicides produces patterns of genetic changes often seen in human neurodegenerative diseases. While the fungicides created autism-like signatures in the way the genes were expressed in mouse neurons, the results do not conclusively show that this class of fungicides causes autism or Alzheimer’s disease. Mark Zylka, Ph.D., lead scientist of the study and associate professor of cell biology and physiology at University of North Carolina, states,  “What this work provides is evidence that these chemicals are bad for neurons. They turn the same genes on or off that you see not only in autism brains, but also in neurodegeneration.” Strobilurins work by disrupting mitochondria, commonly known as the “powerhouse of […]

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15
Oct

Another Study Links Depression in Farmers to Pesticide Use

(Beyond Pesticides, October 15, 2014) A new study published in Environmental Health Perspectives finds a strong relationship between the use of pesticides and depression in farmers. One specific class of pesticide, organochlorines, was associated with a 90% higher chance of being diagnosed with depression. For fumigants, the increased risk was up to 80 percent. This study echoes the conclusion from an earlier French study which also reported that farmers using pesticides face  a greater risk of developing depression. The study, Pesticide Exposure and Depression among Male Private Pesticide Applicators in the Agricultural Health Study, examines possible associations between pesticide exposure and depression among male private pesticide applicators in the Agricultural Health Study (AHS). Over 21,000 applicators who enrolled in the study in 1993—1997 were followed and examined. The applicators were asked about depression when enrolled in the study and then again around 2010. Previous work with this AHS sample found a higher prevalence of depression among male applicators who reported past pesticide poisoning or use of pesticides from several different classes. However, this study examines specific pesticides, and finds that two types of pesticides, fumigants and organochlorine insecticides are positively correlated with depression and cumulative days of use. Those exposed […]

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29
Jan

Higher Risk of Alzheimer’s Disease Linked to Pesticide Exposure

(Beyond Pesticides, January 29, 2014) People with high levels of exposure to the banned insecticide DDT are four times more likely to have Alzheimer’s disease than people with low levels, according to a new study of patients in Georgia and Texas. The research is among the first to report a connection between Alzheimer’s disease, which is the world’s most common neurodegenerative disease, and chemicals in the environment. The traces of the insecticide found in the study’s Alzheimer’s patients are comparable to the amounts found in most Americans today. Although it was banned more than 40 years ago in the U.S., DDT still persists in the environment worldwide and is still used today in developing countries for malaria abatement programs. “Our findings suggest that genetically susceptible individuals with higher levels of DDT exposure may be more at risk,” said Jason Richardson, PhD, a Rutgers University researcher who led the study. The case-control study consisting of existing samples from patients with Alzheimer’s disease and control participants from the Emory University Alzheimer’s Disease Research Center and the University of Texas Southwestern Medical School’s Alzheimer’s Disease Center measured serum levels of DDE in 79 control and 86 Alzheimer’s disease cases. Levels of DDE, a […]

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03
Oct

Elevated Pesticide Exposure Documented in New York City Residents

(Beyond Pesticides, October 3, 2013) According to new research, residents are more highly exposed to organophosphate and pyrethroid pesticides in New York City (NYC) than in the U.S. overall.  Researchers from the city’s Department of Health and Mental Hygiene reviewed the 2004 NYC Health and Nutrition Examination Survey (NYC HANES) to compare its pesticide exposure patterns in an urban environment with the nation as a whole. The NYC HANES includes a biomonitoring component to evaluate pesticide exposures by measuring concentrations of organophosphate and pyrethroid metabolites in urine. According to the authors, the findings underscore the importance of considering pest and pesticide burdens on cities, where a dense population results in a single exposure source affecting many people at the same time when regulating pesticide use. Organophosphate metabolites were measured in the urine of 882 New Yorkers, while 1,452 residents were tested for pyrethroid metabolites. As the researchers explain, the building density and disrepair in parts of NYC likely increased the chances of a pest infestation, which in turn can lead to the reliance on indoor pesticide use. By the 1980’s, organophosphates were the most common class of insecticides in the U.S., and were used indoors until the early 2000’s when […]

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09
May

Review Highlights Dangerous Health Effects of Glyphosate

(Beyond Pesticides, May 9, 2013) A review of the scientific literature of the toxic effects of glyphosate, one of the most popular weed killers in the U.S. and the active ingredient in Roundup, links the herbicide  to a wide range of diseases and suggests  that more research is needed. The review, conducted by a scientist at Massachusetts Institute of Technology (MIT), looks at the mechanisms through which the adverse effects may be happening and points to  the chemical’s inhibition of cytochrome P450 (CYP) enzymes, which plays the crucial role of detoxifying xenobiotics. Thus, glyphosate can enhance the negative effects of other environmental toxicants on the body. Authors argue that this has been a critically overlooked component in research on glyphosates’ toxicity to mammals. We “have hit upon something very important that needs to be taken seriously and further investigated,” Stephanie Seneff, PhD, lead author and research scientist at MIT, told Reuters. Not surprisingly, Monsanto, the developer of Roundup, the leading product containing glyphosate, has attempted to discredit the study, claiming that its product has a long track record of being safe – read Another Bogus “Study.” However, Beyond Pesticides has assembled  extensive documentation on the human health and environmental risks […]

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28
May

New Study Links Occupational Pesticide Exposure to Alzheimer’s Disease, Dementia

(Beyond Pesticides, May 28, 2010) The repeated exposure to organophosphate and organochlorine insecticides can increase the risk of developing Alzheimer’s Disease (AD) or dementia later in life according to a new study published in the May issue of Neurology. The observational study entitled “Occupational exposure to pesticides increases the risk of incident AD” is one of very few studies to examine a link between pesticides and AD. Researchers lead by Kathleen M. Hayden, PhD of Duke University Medical Center examined residents 65 years and older from an agricultural community in Cache County Utah. Participants were assessed for cognitive ability at the inception of the study and again after 3, 7, and 10 years. Data showed that those repeatedly exposed to any pesticides were more likely to develop AD or dementia. Researchers found a higher incidence of AD among those exposed to organophosphates and organochlorines. The risk of AD associated with organophosphate exposure was slightly higher than the risk associated with organochlorines. Researchers also found an increase in dementia among those exposed to organophosphates or organochlorines; however this increase was not statistically significant. Dr. Hayden said that more research was necessary to determine a causal link. Organophosphates are known to reduce […]

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