21
Feb
(Beyond Pesticides, Feb 21, 2007) Exposure to environmental chemicals found in everyday plastics and pesticides while in the womb may make a person more prone to obesity later in life, new research indicates. Frederick vom Saal, Ph.D, professor of biological sciences at University of Missouri-Columbia’s College of Arts and Science, has found that when fetuses are exposed to endocrine-disrupting chemicals, the way their genes function may be altered to make them more prone to obesity and disease. Dr. vom Saal presented his research last week at the annual meeting of the American Association for the Advancement of Science (AAAS) in San Francisco. “Perinatal Programming of Obesity: Interaction of Nutrition and Environmental Exposures” is the title of Dr. vom Saal’s AAAS presentation. “Certain environmental substances called endocrine-disrupting chemicals can change the functioning of a fetus’s genes, altering a baby’s metabolic system and predisposing him or her to obesity,” said Dr. vom Saal. “This individual could eat the same thing and exercise the same amount as someone with a normal metabolic system, but he or she would become obese, while the other person remained thin,” he said. Obesity puts people at risk for other problems, including cancer, diabetes, cardiovascular disease and hypertension. […]
Posted in Children/Schools, Disease/Health Effects | 1 Comment »
13
Feb
(Beyond Pesticides, February 13, 2007) As Valentine’s Day approaches, dozens of roses and bouquets are being stocked at stores nationwide. The intentions may be sweet but many of the flowers are not — most of them have been treated with toxic chemicals. Pesticides are used on most conventionally grown flowers. A good portion of this use takes place in the waterlogged savannah surrounding the capital of Colombia, which has the world’s second-largest cut-flower industry after the Netherlands, producing 62 percent of all flowers sold in the United States. With 110,000 employees — many of them single mothers — and annual exports of US$1 billion, the industry provides an important alternative to growing coca, source crop of the Andean nation’s better known illegal export: cocaine. But these economic gains come at a cost to workers’ health and Colombia’s environment. Colombia’s flower exporters association has attempted to respond by launching the Florverde program, but with limited success; its members have reduced pesticide use by 38 percent since 1998, to an average of 97 kilograms (213 pounds) of active ingredient per hectare (2.4 acres) per year. However, 36 percent of the chemicals used by Florverde farms in 2005 were still listed as “extremely” […]
Posted in Alternatives/Organics, Disease/Health Effects, Holidays, International | 1 Comment »
08
Feb
(Beyond Pesticides, February 8, 2007) Investigators at St. Jude Children’s Research Hospital have shed new light on the suspected role of pesticides in the development of Parkinson’s disease (PD). The study, “GST expression mediates dopaminergic neuron sensitivity in experimental parkinsonism” appearing in the Proceedings of the National Academy of Sciences (January 31, 2007), illustrates the mechanism of nerve cell damage by pesticide exposure. The enzyme that prevents damage to the substantia nigra, the part of the brain where nerve cell damage associated with PD occurs, is called GST pi (“pie”). This enzyme stands like a sentry at the crossroads of several biochemical pathways, any one of which can lead to PD. GST pi protects the nerve cell from death caused by either environmental toxics, such as pesticides, or a self-destruction process called apoptosis (cell suicide), triggered by certain stressful conditions in the cell. If GST pi levels are reduced or this enzyme is overwhelmed by toxics, these nerves are at increased risk of death, according to studies in mouse models. GST pi is one of a family of similar enzymes that eliminate free radicals generated by pesticides and other chemicals. Two members of this family are present in the brain, […]
Posted in Chemicals, Dieldrin, Disease/Health Effects, Maneb, Paraquat, Permethrin, Rotenone | 2 Comments »
06
Feb
(Beyond Pesticides, February 6, 2007) Conservation groups have challenged a government plan that would allow six more years use of a deadly pesticide it admits needs to be banned. The groups, represented by Earthjustice, have reopened a lawsuit in federal district court aiming at speeding up the removal of azinphos-methyl, commonly called AZM or guthion. The legal actions also takes aim at getting rid of two other deadly pesticides, phosmet and chlorpyrifos. All three pesticides were developed from World War I-era nerve toxins. AZM is used primarily to kill insects on orchard crops such as apples, cherries, pears, peaches, and nectarines. The highest uses occur in Washington, Oregon, California, Michigan, Georgia, New York, New Jersey, and Pennsylvania. Chlorpyrifos is used widely on corn and orchard crops. Use of phosmet on orchard crops and blueberries poses particularly serious risks to workers. In November 2006, EPA decided that AZM poses unreasonable adverse effects and must be banned but allowed its continued use on fruit crops for six more years — until 2012 — and on nut crops for three more years — until 2009. “With safer alternatives already in widespread use, EPA has betrayed the trust of the men, women, and children […]
Posted in Azinphos-methyl, Chemicals, Chlorpyrifos, Disease/Health Effects, Phosmet | No Comments »
30
Jan
(Beyond Pesticides, January 30, 2007) Breast cancer groups across the country have a new issue to add to the repertoire of risk factors: Pesticide use. A study published online in the American Journal of Epidemiology has found a strong link between residential pesticide use and breast cancer risk in women. Responding to the study, Susan Teitelbaum, Ph.D., assistant professor in the department of community medicine at the Mount Sinai School of Medicine in New York, says the options are simple”” “Stop using pesticides.” The study, published December 13, is the first to examine the relation between breast cancer and pesticides through self-reported residential pesticide use. Using women from New York, the study looks not at one or two incidents of pesticide contact, but at the impact of lifelong pesticide use in the home, lawn and garden. Using a sample of 1,508 women who were diagnosed with breast cancer between 1996 and 1997, the study compares these women to 1,556 control subjects who were randomly selected. The results show that those women whose blood samples had higher levels of organochlorines are at an increased risk of breast cancer. Organochlorines are a broad class of chemicals, including DDT, dieldrin, and chlordane, and […]
Posted in Breast Cancer, Chemicals, Chlordane, DDT, Dieldrin, Lawns/Landscapes | 4 Comments »
19
Jan
(Beyond Pesticides, January 19, 2007) A recent study conducted in Manitoba, Canada, has found that residents in communities in which agricultural pesticides have been applied heavily are at a higher risk for eye disorders and for giving birth to children with abnormalities or birth defects. Significantly, these results are not confined to those who work with pesticides directly””such as farmers””but are relevant among entire populations. “Often studies are done on a particular people like, let’s say, the group of farmers who have direct contact with pesticides,” says Patricia Martens, Ph.D., director of the Manitoba Center for Health Policy. “This study was looking at the entire population.” Jennifer Magoon, a graduate student from the University of Manitoba, looked at Manitoba’s database of public health records, comparing records from areas of intensive agricultural pesticide use with areas that use little. She studied 323,368 health records from the years 2001 to 2004, which included pharmaceutical files, physician claims, and hospital separations. What she has found are “statistically significant” links between higher pesticide use and health problems. She has found that, compared with areas of average pesticide use, the chance for abnormalities in babies born in high-use areas rose four percentage points for males […]
Posted in Disease/Health Effects | No Comments »
