Toxicity Studies

State of the Climate in Asia 2024

The World Meteorological Organization’s State of the Climate in Asia 2024 report warns that the region is warming nearly twice as fast as the global average, driving more extreme weather and posing serious threats to lives, ecosystems, and economies. In 2024, Asia experienced its warmest or second warmest year on …

Bottles can be toxic - Part II

In spite of the prohibition on the use of Bisphenol-A (BPA) in baby feeding bottles, the toxic chemical continues to be found in some baby products sold in the Indian market. BPA is an endocrine disrupting chemical that has been accepted as the chemical of concern globally. It is a …

Long term toxicity of a Roundup herbicide and a Roundup-tolerant genetically modified maize

The health effects of a Roundup-tolerant genetically modified maize (from 11% in the diet), cultivated with or without Roundup, and Roundup alone (from 0.1 ppb in water), were studied 2 years in rats. In females, all treated groups died 2–3 times more than controls, and more rapidly. This difference was …

Laboratory rodent diets contain toxic levels of environmental contaminants: Implications for regulatory tests

The quality of diets in rodent feeding trials is crucial. We describe the contamination with environmental pollutants of 13 laboratory rodent diets from 5 continents. Measurements were performed using accredited methodologies. All diets were contaminated with pesticides (1-6 out of 262 measured), heavy metals (2-3 out of 4, mostly lead …

Formaldehyde is a potent proteotoxic stressor causing rapid heat shock transcription factor 1 activation and Lys48-linked polyubiquitination of proteins

Endogenous and exogenous formaldehyde (FA) has been linked to cancer, neurotoxicity, and other pathophysiologic effects. Molecular and cellular mechanisms that underlie FA-induced damage are poorly understood. In this study, we investigated whether proteotoxicity is an important, unrecognized factor in cell injury caused by FA. Original Source

The health risk of formaldehyde to human beings

Formaldehyde was classified as a potential human carcinogen, identified by the US Environmental Protection Agency and International Agency for Research on Cancer as a Class 2A carcinogen. It also can cause irritation to human. However, formaldehyde present in biological fluids or tissues and environment as a result of natural processes …

Airborne polycyclic aromatic compounds contribute to the induction of the tumour-suppressing P53 pathway in wild double-crested cormorants

Polycyclic aromatic compounds (PACs), including polycyclic aromatic hydrocarbons (PAHs) and PAH-like compounds are known or probable environmental carcinogens released into the environment as a by-product of incomplete combustion of fossil fuels and other organic materials. Studies have shown that exposure to PACs in the environment can induce both genotoxicity and …

Order of the Supreme Court of India regarding provision of clean drinking water to residents living around Union Carbide plant, Bhopal, Madhya Pradesh, 18/04/2018

Order of the Supreme Court of India in the matter of Research Foundation for Science Vs Union of India & Others dated 18/04/2018 regarding provision of clean drinking water to residents living around Union Carbide plant, Bhopal, Madhya Pradesh. In the response filed on behalf of the State of Madhya …

Differences in the carcinogenic evaluation of glyphosate between the International Agency for Research on Cancer (IARC) and the European Food Safety Authority (EFSA)

The International Agency for Research on Cancer (IARC) Monographs Programme identifies chemicals, drugs, mixtures, occupational exposures, lifestyles and personal habits, and physical and biological agents that cause cancer in humans and has evaluated about 1000 agents since 1971. Monographs are written by ad hoc Working Groups (WGs) of international scientific …

Glyphosate toxicity and carcinogenicity: a review of the scientific basis of the European Union assessment and its differences with IARC

Glyphosate is the most widely used herbicide worldwide. It is a broad spectrum herbicide and its agricultural uses increased considerably after the development of glyphosate-resistant genetically modified (GM) varieties. Since glyphosate was introduced in 1974, all regulatory assessments have established that glyphosate has low hazard potential to mammals, however, the …

Comparative toxicity of nanoparticulate CuO and ZnO to soil bacterial communities

The increasing industrial application of metal oxide Engineered Nano-Particles (ENPs) is likely to increase their environmental release to soils. While the potential of metal oxide ENPs as environmental toxicants has been shown, lack of suitable control treatments have compromised the power of many previous assessments. We evaluated the ecotoxicity of …

DDT exposure of Zebrafish embryos enhances seizure susceptibility

California sea lions have a large body burden of organochlorine pesticides, and over the last decade they have also been subject to domoic acid poisoning. Domoic acid poisoning, previously recognized in adult animals, is now viewed as a major cause of prenatal mortality. The appearance of a chronic juvenile domoic …

The enigma of litchi toxicity: an emerging health concern in southern Asia

How is it possible that lychee, a deliciously sweet tropical fruit, could induce a fatal hypoglycemic encephalopathy in children? The answer is straightforward: the edible fruit (aril) of lychee or litchi (Litchi sinensis or Litchi chinensis), and other members of the Soapberry family (Sapindaceae), contains unusual amino acids that disrupt …

Transgenerational effects from early developmental exposures to bisphenol A or 17α-ethinylestradiol in medaka, Oryzias latipes

The transgenerational consequences of environmental contaminant exposures of aquatic vertebrates have the potential for broad ecological impacts, yet are largely uninvestigated. Bisphenol A (BPA) and 17α-ethinylestradiol (EE2) are two ubiquitous estrogenic chemicals present in aquatic environments throughout the United States and many other countries. Original Source

Serum concentrations of organochlorine pesticides and growth among Russian boys

Limited human data suggest an association of organochlorine pesticides (OCPs) with adverse effects on children’s growth. The authors evaluated the associations of OCPs with longitudinally assessed growth among peripubertal boys from a Russian cohort with high environmental OCP levels.  

Extended chronology of the Cordón Caulle volcanic eruption beyond 2011 reveals toxic impacts

Aside of immediate impacts, the 2011 Puyehue–Cordón Caulle volcano (PCC) eruption also caused persisting chemical impacts. By 2012, toxicity resulted in overt dental fluorosis in deer, with bone fluoride increasing > 38-fold to 5175 ppm. Sheep, horses and cattle also succumbed to fluorosis. Due to eolian redeposition of tephra, exposure …

Glyphosate Issue Paper: Evaluation of carcinogenic potential

Glyphosate is a non-selective, phosphonomethyl amino acid herbicide registered to control weeds in various agricultural and non-agricultural settings. The herbicide acts by inhibiting the 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) enzyme, which is not present in mammalian systems. Glyphosate was initially registered in 1974. Since then, several human health analyses have been completed …

Assessment of food and environmental safety (AFES) for environmental release of genetically engineered mustard hybird DMH-11 and use of parental events for development of new …

Assessment of food and environmental safety (AFES) for environmental release of genetically engineered mustard hybird DMH-11 and use of parental events for development of new generation hybirds

Effluent from bulk drug production is toxic to aquatic vertebrates

Very high levels of a range of pharmaceuticals have been reported recently in the effluent from a wastewater treatment plant near Hyderabad, India. The plant serves approximately 90 manufacturers of bulk drugs that primarily are exported to the world market. Fluoroquinolone antibiotics were found at levels that are highly toxic …

Hormone disruption by PBDEs in adult male sport fish consumers

Persistent pollutants, such as polychlorinated biphenyls (PCBs), affect endocrine function. Human exposure to polybrominated diphenyl ethers (PBDEs), which are similar in structure to PCBs, has increased recently, but health effects have not been well studied. Our goal in this study was to determine whether PBDE body burdens are related to …

Perinatal DDT exposure induces hypertension and cardiac hypertrophy in adult mice

Dichlorodiphenyltrichloroethane (DDT) was used extensively to control malaria, typhus, body lice, and bubonic plague worldwide, until countries began restricting its use in the 1970s. However, use of DDT to control vector-borne diseases continues in developing countries. Prenatal DDT exposure is associated with elevated blood pressure in humans. Original Source

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