alexa Response of Rattus norvegicus to Bitumen Leachate Toxicity
ISSN: 2168-9652

Biochemistry & Physiology: Open Access
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Research Article

Response of Rattus norvegicus to Bitumen Leachate Toxicity

Ayandiran TA1*, Fawole OO1, Dahunsi SO2* and Ogundiran MA1

1Department of Pure and Applied Biology, Ladoke Akintola University of Technology, Ogbomoso, Nigeria

2Biological Sciences Department, Landmark University, Omu-Aran, Nigeria

Corresponding Author:
Dahunsi SO
Biological Sciences Department
Landmark University, Omu-Aran, Nigeria
Tel: +2347032511675
E-mail: [email protected]

Received date: June 13, 2017; Accepted date: June 30, 2017; Published date: July 07, 2017

Citation: Ayandiran TA, Fawole OO, Dahunsi SO, Ogundiran MA (2017) Response of Rattus norvegicus to Bitumen Leachate Toxicity. Biochem Physiol 6:221. doi:10.4172/2168-9652.1000221

Copyright: © 2017 Ayandiran TA, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

This study investigated the response of Rattus norvegicus to bitumen leachate to evaluate its toxicity in a terrestrial animal model following previous aquatic studies on the environmental impacts of Nigerian bitumen exploration. Adult rats were administered different concentrations (20 to 100%) of bitumen leachate for 30 days before analyses. Fourteen blood plasma clinical–chemical parameters (BCCPs), seven hematological parameters as well as histological changes in organs of exposed animals were studied. The analyses showed that all values for the BCCPs and the hematological parameters are significantly different (P<0.05) from the control values. Concentrations of liver enzymes, Alanine aminotransferase (ALAT), Gamma glutamyltransferase (GGT) and Alkaline phosphatase (ALKP) increased with increasing concentrations of bitumen leachate but were not dose-dependent. In the same vein, counts for Packed cell volume (PCV), White blood cell (WBC), Red blood cell (RBC) and hemoglobin (Hb) all decreased with increasing concentration of toxicants but was not so for differential counts (Neutrophils, Lymphocytes and Eosinophils). Results of histological study revealed several changes ranging from mild to severe lesions in organs of exposed rats. The very pronounced changes include irregularly arranged cardiac muscle fibres (Heart), pronounced inflammation (Spleen), hyperchronic nuclei and degenerated flattened squamous epithelial cells lining the Bowman’s capsule (Kidney), pronounced reduction of Graffian follicle (Ovary) and cellular hypertrophy with severe congestion of the central vein (Liver). Based on these results, important organ functions could be negatively affected by continuous exposure to bitumen leachate which reflects health effects having an overall impact on both animal and human populations.

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