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Journal of Xenobiotics is published by MDPI from Volume 10 Issue 1 (2020). Previous articles were published by another publisher in Open Access under a CC-BY (or CC-BY-NC-ND) licence, and they are hosted by MDPI on mdpi.com as a courtesy and upon agreement with PAGEPress.

J. Xenobiot., Volume 5, Issue 1 (April 2015) – 4 articles

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628 KiB  
Article
Toxicity Effect of Sub-Chronic Oral Administration of Class Bitters®—A Polyherbal Formula on Serum Electrolytes and Hematological Indices in Male Wistar Albino Rats
by Kingsley C. Patrick-Iwuanyanwu and Kpobari W. Nkpaa
J. Xenobiot. 2015, 5(1), 5369; https://doi.org/10.4081/xeno.2015.5369 (registering DOI) - 10 Nov 2015
Cited by 1 | Viewed by 793
Abstract
The indiscriminate administration of readyto- use herbal formulations has become a major concern due to their potential health risk. The study investigated the effect of class bitters® (CB) - a polyherbal formula prepared with Mondia whitei, Khaya senegalensis, Capparis erythrocarpus, [...] Read more.
The indiscriminate administration of readyto- use herbal formulations has become a major concern due to their potential health risk. The study investigated the effect of class bitters® (CB) - a polyherbal formula prepared with Mondia whitei, Khaya senegalensis, Capparis erythrocarpus, Thoningia sanguinea and Xylopia aethiopica on serum electrolytes and hematological parameters in male Wistar albino rats. Two doses (500 and 1000 mg kg–1) of the polyherbal drugs were administered orally to male Wistar albino rats for a period of 9 weeks. The results showed that administration of 500 and 1000 mg kg–1 body weight of CB recorded a marked increase in the levels of sodium and chlorum when compared with control. However, there was a marked reduction in the levels of potassium and hydrogen carbonate. The results of the study also showed a significant (P≤0.05) decrease in the level of hematological parameters such as hemoglobin (Hb), packed cell volume (PCV), red blood cells (RBCs) and platelets levels in the male Wistar albino rats, when compared with control. The marked decrease in Hb, PCV, RBCs and platelets concentrations observed in experimental rats in this study suggest that CB may have an adverse effect on erythropoiesis. These observations therefore showed that long-term administration of CB might cause renal disease and anemia. Full article
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Article
Exposure to Bisphenol A and Gender Differences: From Rodents to Humans Evidences and Hypothesis about the Health Effects
by Lidia Caporossi and Bruno Papaleo
J. Xenobiot. 2015, 5(1), 5264; https://doi.org/10.4081/xeno.2015.5264 (registering DOI) - 5 Nov 2015
Cited by 32 | Viewed by 1318
Abstract
Bisphenol A (BPA) interacts with the endocrine system and seems to produce different effects in relation to gender. The objective of the study was to clarify the possible health effects of exposure to BPA in relation to gender. A literature search was performed [...] Read more.
Bisphenol A (BPA) interacts with the endocrine system and seems to produce different effects in relation to gender. The objective of the study was to clarify the possible health effects of exposure to BPA in relation to gender. A literature search was performed using three different search engines: Medline, PubMed and Scopus. Data on both animals and humans showed that BPA acts as a xenoestrogen and interacts with the androgens’ metabolism, producing different outcomes: uterotropic effects, decreasing sperm production, stimulation of prolactin release. Gender difference plays a key role in understanding the real toxic effects, the BPA serum concentrations were, all the time, higher in male subjects, possibly due to the difference in androgen-related enzyme activity levels, compared with the healthly female subjects, to equal levels of exposure; while higher BPA levels in women have been associated with a variety of conditions including obesity, endometrial hyperplasia, recurrent miscarriages, and polycystic ovarian syndrome. The data collected are sufficiently robust to raise concerns about the potentially deleterious impact of BPA on humans, even with some methodological limitations; the different impact of BPA in men and in women is documented and of a certain interest. In toxicology it is necessary to assess effects in relation to gender differences, in order to set up prevention plans in the work environment targeting the specific risk. Full article
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Article
Microscale Ecotoxicity Testing of Moselle River Watershed (Lorraine Province, France) Sediments
by Jean François Férard, Karen F. Burga Pérez, Christian Blaise, Alexandre Péry, Pakawadee Sutthivaiyakit and François Gagné
J. Xenobiot. 2015, 5(1), 5125; https://doi.org/10.4081/xeno.2015.5125 (registering DOI) - 9 Jun 2015
Cited by 5 | Viewed by 732
Abstract
The ecotoxic potential of seven Moselle river watershed sediments was assessed with a battery of bioassays comprised of rapid phototrophic [LuminoTox solid phase (L-SPA) and elutriate (L-ELU) assays] and bacterial [Microtox solid phase assay (M-SPA)] exposure tests, as well as with two micro-invertebrate [...] Read more.
The ecotoxic potential of seven Moselle river watershed sediments was assessed with a battery of bioassays comprised of rapid phototrophic [LuminoTox solid phase (L-SPA) and elutriate (L-ELU) assays] and bacterial [Microtox solid phase assay (M-SPA)] exposure tests, as well as with two micro-invertebrate solid phase tests conducted with Hydra attenuata (lethal and sublethal effects solid phase assay, HL-SPA and HSL-SPA) and Chironomus riparius. Measured effects of sediments and their elutriates were varied and reflected responses that were ecotoxicity test-, endpoint- and site-dependent, suggesting some degree of risk toward benthic and water column organisms, respectively, at specific sites. Correlation analysis demonstrated that L-SPA and M-SPA ecotoxicity responses were significantly linked with the Hydra HSL-SPA assay, indicating their ability to predict ecotoxicity towards an invertebrate taxonomic group representing secondary consumers. While the L-SPA and M-SPA assays hold promise as rapid screens for sediment ecotoxicity, correlation analysis with grain size (L-SPA: r=-0.795, P=0.033; M-SPA: r=-0.73, P=0.07) points out that their responses can be influenced by the presence of fines (i.e., sediment particles ≤0.063 mm in size) and that this information is essential to properly interpret ecotoxicity data generated with these assays. Finally, notable differences observed in trophic level sensitivities once again recall the importance of employing a test battery to adequately appraise the ecotoxicity of sediments. Full article
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Article
Single-Walled Carbon Nanotubes Toxicity to the Freshwater Amphipod Hyalella azteca: Influence of Sediment and Exposure Duration
by Messika Revel, Michel Fournier and Pierre Yves Robidoux
J. Xenobiot. 2015, 5(1), 5086; https://doi.org/10.4081/xeno.2015.5086 (registering DOI) - 29 Apr 2015
Cited by 6 | Viewed by 675
Abstract
Carbon nanomaterials are present in various industrial applications and therefore their release into the environment including freshwater ecosystem is expected to increase. The aim of the present study was to investigate the influence of several parameters on the toxicity of single-walled carbon nanotubes [...] Read more.
Carbon nanomaterials are present in various industrial applications and therefore their release into the environment including freshwater ecosystem is expected to increase. The aim of the present study was to investigate the influence of several parameters on the toxicity of single-walled carbon nanotubes (SWCNT) to the freshwater amphipod, Hyalella azteca. The effect of period of exposure, sediment presence and possible impurities released during SWCNT preparation on survival and/or growth of such organism was evaluated. We measured a reduction of survival at concentrations ranging from 10 to 40 mg/L after 96-h exposure, while no mortality was observed with the same concentrations and in the presence of artificial sediment after 14 days of exposure. It is possible that SWCNT are adsorbed on the organic matter from the artificial sediment leading to a decrease of SWCNT bioavailability. The survival and growth toxicity tests revealed a stronger effect at 28 days compared to the 14 days of exposure, and full mortality of organisms at 1000 mg/L for both exposure times. The presence of SWCNT in the gut of survived organisms was observed. The present study demonstrates that the interaction with sediment should be considered when carbon nanotubes toxicity through water exposure is investigated. Full article
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