Assessment of oxidative stress, genotoxicity and histopathological responses in the digestive gland of Ruditapes decussatus collected from northern Tunisian lagoons
S. Bejaoui, I. Rabeh, K. Telahigue, M. Tir, I. Chetoui, C. Fouzai, S. Nechi, E. Chelbi, M. El Cafsi, N. Soudani
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引用次数: 3
Abstract
The aim of the present study was to investigate the combined effects of seasonality and anthropogenic pressure on a battery of oxidative stress, lipid peroxidation, protein oxidation, DNA damage and histological alterations in the native clam Ruditapes decussatus collected from a less contaminated area (LCA), Ghar El Melh, a moderately contaminated area (MCA), the North Lake, and a highly contaminated area (HCA), the South Lake, all located in the southern Mediterranean Sea. The accumulation of cadmium, lead, copper, iron and zinc was higher in the digestive glandsof clams collected from the MCA and the HCAthan in those from the LCA, particularly during the warm season. Our results reveal that metallothionein, lipid peroxidation, protein oxidation levels and antioxidant defence systems were higher, while acetylcholinesterase activity was lower, in clams from the MCAand HCAthan in those from the LCA. The results also indicate that clams from the MCA and the HCAare characterized by histological alterations and DNA damage. In conclusion, the evident changes of antioxidant defence systems and macromolecules between the studied lagoons reveal the perturbation of the physiological states of clams from polluted sites thatcope with seasonal changes and trace element accumulations.
本研究的目的是研究季节性和人为压力对从污染较少地区(LCA)、Ghar El Melh、中度污染地区(MCA)、北湖、,以及一个高度污染区南湖,全部位于地中海南部。MCA和HCAthan采集的蛤蜊消化腺中镉、铅、铜、铁和锌的积累高于LCA采集的蛤蚌,尤其是在温暖季节。我们的结果表明,MCA和HCAthan的蛤蜊中金属硫蛋白、脂质过氧化、蛋白质氧化水平和抗氧化防御系统较高,而乙酰胆碱酯酶活性较低。结果还表明,MCA和HCAa的蛤蜊具有组织学改变和DNA损伤的特征。总之,所研究的泻湖之间抗氧化防御系统和大分子的明显变化揭示了污染地区蛤蜊的生理状态对季节变化和微量元素积累的扰动。
期刊介绍:
Scientia Marina is the successor to Investigación Pesquera, a journal of marine sciences published since 1955 by the Institut de Ciències del Mar de Barcelona (CSIC). Scientia Marina is included in the Science Citation Index since 1998 and publishes original papers, reviews and comments concerning research in the following fields: Marine Biology and Ecology, Fisheries and Fisheries Ecology, Systematics, Faunistics and Marine Biogeography, Physical Oceanography, Chemical Oceanography, and Marine Geology. Emphasis is placed on articles of an interdisciplinary nature and of general interest.