The present study was conducted to evaluate the ameliorative role of pumpkin seed oil (PSO) against potential adverse effects of bisphenol-A (BPA) in male mice. BPA was administered to the mice orally at a dose of 50 mg/kg body weight once a day for 28 successive days. While, PSO was administered to the mice orally at 1 mL/kg b w either before, with or after treatment of BPA, once a day for 28 successive days. The studied parameters were DNA damage evaluation using comet assay in liver and testes cells and micronucleus test in bone marrow; and histopathological examination of liver and testes tissues. Results revealed that BPA induced DNA damage in tested cells and marked histopathological alterations in liver and testes. In contrast, PSO treatments alleviated DNA damage and improved the histopathological alterations in liver and testes tissues. Furthermore, administration of mice with the PSO before BPA treatment was the best regimen in the alleviation of the adverse effects of BPA, followed by administration of PSO after then with treatment of BPA. It can be concluded that PSO may has a protective role against BPA genotoxicity and histopathological alterations in male mice.

Impact of bioaccumulation and biosedimentation of some heavy metals on some biochemical responses in the sole fish, Solea solea inhabiting Lake Qarun, Egypt.

The journal of Toxicology and pest control is one of the series issued twice by the Egyptian Academic Journal of Biological Sciences, and is devoted to publication of original papers related to the interaction between insects and their environment. The goal of the journal is to advance the scientific understanding of mechanisms of toxicity. Emphasis will be placed on toxic effects observed at relevant exposures, which have direct impact on safety evaluation and risk assessment. The journal therefore welcomes papers on biology ranging from molecular and cell biology, biochemistry and physiology to ecology and environment, also systematics, microbiology, toxicology, hydrobiology, radiobiology and biotechnology. www.eajbs.eg.net Provided for non-commercial research and education use. Not for reproduction, distribution or commercial use.

Background: Flaxseed oil is one of the most vital oils that contain a high content of omega-3 polyunsaturated fatty acids (PUFAs) recognized as a high-quality nutrition for health benefits. In addition, a source of vitamin E and β-carotene has a positive health effect in a variety of pathologies. The goal of the present work was to investigate the protecting character of flaxseed oil against bisphenol-A deleterious effects in male mice. Animals were gavaged with BPA for 28 successive days. They were orally administered flaxseed oil either before, with, or after treatment of BPA. DNA damage was evaluated in the liver, testes, and bone marrow cells using comet and micronucleus assays. Liver and testes histopathological examination as well as sperm physical characters were also investigated. Results: The results showed that BPA induced a significant raise in DNA damage that obviously appear in the increase of tail length, tail DNA percentage, and tail moment in the liver and testes. In addition, there was an increase in the frequency of micronuclei in bone marrow cells. Liver and testes histopathological alterations and sperm count and motility significant comedown were seen in male mice exposed to BPA as well. Conversely, flaxseed oil oral administration through the three regimens of treatment effectively attenuated the abovementioned effects. Moreover, administration of flaxseed oil before BPA treatment was the best protocol in the attenuation of BPA toxic effects. Conclusions: Flaxseed oil successfully attenuated the BPA genotoxicity, sperm defects, and histological alterations in male mice that may be referred to its antioxidant property.

The study was conducted during the period from October 2015 to September 2016 to investigate the accumulation of five heavy metals in three fish species (Tilapia zillii, Solea solea and Mugil cephalus) inhabiting lake Qarun, Egypt. Water, sediments and fish samples were collected from six sites cover eastern, middle and western sectors of the lake during the four studied seasons. The results indicated that, summer time showed the highest pH, salinity, biological oxygen demand and nitrates concentration, while autumn and spring times showed the highest nitrites concentration depending on the site. The abundance of metals in lake water, sediments and fish followed the order: Fe > Zn ≈ Mn > Cu > Cd. In all fish species Fe and Zn exceeded the permissible limits. Regardless fish species, the highest concentrations of metals were recorded in fish liver, while the lowest in fish muscles. Mugil species seemed to be more contaminated with metals than the other species. It is recommended to coordinate different efforts to rescue Lake Qarun from heavy metal pollution.