Research Results
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2015
Carcinogenesis
A review examining the intersection of environmental toxicants, immune function, and cancer development argues that common chemicals like bisphenol A, atrazine, and phthalates can disrupt the delicate balance between pro- and anti-inflammatory immune responses, potentially contributing to tumor development through immune system dysfunction. The authors highlight that while the role of immunity in cancer is well-established, research on how environmental chemicals affect immune cells as co-factors in cancer causation remains underdeveloped compared to studies on autoimmunity and allergies. The review calls for increased research using systems biology approaches to better understand how chemical exposures disturb inflammatory pathways and immune molecules involved in tumor-associated inflammation, arguing that chemically induced immune perturbations represent an important but understudied mechanism of environmental carcinogenesis.
2015
Carcinogenesis
This study explores the linkage between environmental chemical exposures and cellular resistance to cell death, a carcinogenic trait. The researchers in this study specifically investigate BPA, chlorothalonil, dibutyl phthalate, and more because of their disruptive effects that may be involved in these carcinogenic pathways. The researchers found that arsenic interferes with cellular signaling pathways and induces oxidative stress, leading to impaired apoptosis; dioxins bind to aryl hydrocarbon receptors (AHRs), which alters gene expression and disrupts normal cell death processes; BPA mimics the estrogen hormone, affecting hormonal balance and promoting cell survival pathways that inhibit cell death. By allowing cells to evade cell death, these environmental chemicals can promote the survival of cells with genetic mutations and therefore increase the risk of cancer development.
2014
Aging Dis
The following review article described how exposure to EDCs during early development can lead to adverse health outcomes later in life through epigenetic mechanisms based on existing studies. The article emphasizes that exposure to EDCs during critical developmental periods such as in utero and early childhood, can have lasting effects on health since, during these periods, the body’s systems are particularly vulnerable to exposures. Additionally, the article finds a link between early-life exposure to EDCs and increased risk of various health issues later on in life, including metabolic disorders and cancers. The suspected mechanism by which these chemicals do this is thought to be mediated by epigenetic changes, which are changes to gene expression without altering the DNA. Therefore, the article emphasizes understanding how exposure during such sensitive periods in development can pose such drastic problems later on in life.
2014
Environ Health Perspect
This review of exposure biomarkers for chemicals potentially linked to breast cancer identified methods for 102 chemicals causing mammary tumors in rodents, finding biomarkers for nearly 75% of them, with human exposure biomarkers existing for 62 chemicals (45 measured in non-occupationally exposed populations) and the CDC tracking 23 of them. Among rodent mammary carcinogens with >50% population detection frequency were PAHs (98%), methyleugenol (98%), PFOA (>50%), chlordane (>50%), acrylamide (>50%), and benzene (>50%), indicating near-universal exposure to multiple mammary carcinogens, with several additional chemicals showing >50% detection of urinary metabolites including ethylene oxide, acrylonitrile, fenvalerate, and vinyl chloride (71-75%). The study found consistent carcinogenicity between humans and rodents for many chemicals, though limited data exists for direct effects in humans, and emphasizes the availability of biomonitoring tools and resources to advance breast cancer prevention efforts. The findings underscore that populations are ubiquitously exposed to multiple known mammary carcinogens simultaneously, highlighting the urgent need for biomonitoring programs to assess mixed exposures and inform prevention strategies targeting modifiable environmental risk factors for breast cancer.
2011
J Steroid Biochem Mol Biol
Bisphenol A (BPA) is a widely produced chemical used in plastics and food container linings, with frequent human exposure due to its leaching into food and beverages. BPA, a known endocrine disruptor, was initially deemed a weak estrogen but has shown potency comparable to estradiol, a form of estrogen, shown to affect multiple hormonal pathways. Studies on rodents reveal adverse effects at levels below and at the current acceptable daily intake, raising concerns about human health impacts about concentration. BPA’s estrogenic effects highlight the importance of investigating BPA’s complex, widespread impacts on health.
2025
Sci Total Environ
A review of endocrine-disrupting compounds (EDCs) in aquatic environments examined two key questions: whether EDCs can impact fish reproductive health and survival, and whether they are actually affecting wild fish populations. Laboratory evidence strongly supports that aquatic EDCs can impair reproductive health in various fish species, but evidence that environmental EDC exposure is actually impacting reproductive success and sustainability of indigenous fish populations in their natural habitats remains limited and less convincing. The authors note that this evidence gap may reflect the critical need for reliable in situ methods to assess fish reproduction and population structure changes in EDC-exposed populations, emphasizing that linking endocrine disruption and reproductive impairment to ecologically relevant impacts on wild fish population sustainability remains an open scientific challenge with few exceptions.
2025
Int J Cancer
The “estrobolome”—gut bacteria involved in processing estrogens and related compounds—has been theorized to influence breast cancer risk by affecting hormone levels, but a comprehensive review found limited and inconsistent evidence linking specific bacterial species to breast cancer. Only two bacteria (Escherichia coli and Roseburia inulinivorans) showed both functional relevance and differences between breast cancer patients and healthy controls, suggesting that either measurement methods need improvement or that broader ecological changes in the gut microbiome are more important than specific estrogen-processing bacteria. The review calls for future studies using advanced techniques like metabolomics and transcriptomics alongside microbiome sequencing to better understand whether and how gut bacteria influence breast cancer through hormone pathways, while accounting for lifestyle and clinical factors that may modify these relationships.
2023
Gut Microbes
Glyphosate, the active ingredient in Roundup herbicide, works by blocking a pathway that plants use to make certain amino acids—a pathway that humans don’t have—but this same pathway exists in gut bacteria, raising concerns about the herbicide’s effects on the human microbiome. Growing evidence suggests that Glyphosate exposure may disrupt the balance of beneficial bacteria in the gut, potentially inhibiting their growth or altering their function, which could have important health implications given the gut microbiome’s significant role in overall wellbeing. This review highlights the need for further research into how Glyphosate exposure affects gut bacteria composition and function, as disruptions to the microbiome have been linked to various health disorders.
2022
Sci Total Environ
A comprehensive review of endocrine-disrupting compounds (EDCs) in water systems found that these emerging contaminants pose significant health risks to humans and aquatic life, yet conventional water treatment processes fail to remove them effectively and no regulatory discharge limits currently exist. The review examined various treatment approaches (physical, chemical, biological, and hybrid methods) and identified agricultural waste-based adsorbents as a promising, low-cost, and sustainable solution for efficiently removing EDCs from water. Research findings indicate that these abundantly available agri-waste materials can effectively capture EDCs, offering an economical alternative to conventional treatment methods, though the review also highlights ongoing challenges and the need for further development of these technologies to address the growing threat of endocrine-disrupting pollution in water supplies.
2021
Food Chem
An umbrella review analyzing 72 meta-analyses found that red meat consumption was associated with increased risk of 10 different cancer types (including breast cancer), while processed meat was linked to 11 cancer types, with both showing consistent dose-dependent increases in risk. Specifically, eating an additional 100 grams of red meat daily (about 3.5 ounces) was associated with 11-51% higher cancer risk, while an extra 50 grams of processed meat daily (equivalent to about 1-2 slices of deli meat or one hot dog) increased cancer risk by 8-72% depending on cancer type. The evidence showed no cancer risk level at which red or processed meat consumption was beneficial, suggesting that reducing intake of these meats could be an important dietary strategy for cancer prevention, including breast cancer.
2020
Environ Health Perspect
This article focuses on microplastics (MP’s), their effect on marine life and routes of human exposure. MP human exposure usually occurs through inhalation or ingestion which comes from contaminated fish and environment. MP’s are concerning because they spread either as pellets/by products or through degradation and fragmentation of plastic products. When this occurs, and reaches water and marine life, they then become contaminated with this plastic and degrade further, and leave forever chemicals as well. Due to the complex and persistent nature of these chemicals, they remain in organ systems of humans for long periods of time. It is important to remember that in small amounts they may not cause many effects but as these chemicals accumulate, it can cause risk to reproductive and hormonal issues.
2019
Sci Total Environ
A comprehensive review examines enzyme-mediated bioremediation—particularly using laccases and other oxidoreductases, hydrolases, and transferases—as a compelling strategy for degrading highly toxic and carcinogenic restricted use pesticides (RUPs) that accumulate in non-target organisms including humans, aquatic life, and microbes through modern agricultural practices and environmental pollution. While native enzymes often face limitations in industrial applications due to high cost and susceptibility, immobilization on support materials enhances stability, reusability, activity, specificity, and enables continuous system operation for more effective removal of these refractory compounds. The review covers pesticide sources, environmental occurrence, ecosystem and human health impacts, and specifically highlights laccase’s exceptional efficiency, specificity, eco-sustainability, and broad substrate range for pesticide degradation and detoxification, while proposing that deploying robust laccase-assisted biocatalytic systems will improve understanding of pesticide persistence and facilitate development of sustainable processes to remediate contaminated environmental matrices and reduce human exposure to these hazardous emerging contaminants.
2007
Cancer
A comprehensive review found that while laboratory studies have identified numerous environmental chemicals that cause breast tumors in animals or mimic estrogen, human epidemiological evidence is strongest for PAHs (found in air pollution and grilled foods) and PCBs (banned industrial chemicals), particularly in women with certain genetic variations affecting how their bodies process these chemicals and hormones. Evidence linking dioxins and organic solvents to breast cancer is limited but suggestive, while many chemicals identified as mammary carcinogens in animal studies have never been investigated in human populations due to challenges in measuring past exposures and the decades-long delay between exposure and cancer diagnosis. The review argues that given these methodological limitations in human studies, policymakers should rely more heavily on animal and laboratory evidence to develop regulations that reduce chemical exposures, as waiting for definitive human proof may unnecessarily delay prevention strategies that could reduce breast cancer rates.