Metallothionein-like proteins in Macoma balthica: effects of metal exposure and natural factors

2000 ◽  
Vol 57 (1) ◽  
pp. 34-42 ◽  
Author(s):  
C Mouneyrac ◽  
A Geffard ◽  
J C Amiard ◽  
C Amiard-Triquet
Keyword(s):  
Significant Relationship ◽  
Metal Pollution ◽  
Geographical Origin ◽  
Macoma Balthica ◽  
Metal Exposure ◽  
Biological Processes ◽  
Natural Factors ◽  
The Baltic

Biological processes involved in the tolerance acquired by populations chronically exposed to metal pollution in the environment were examined in baltic clams (Macoma balthica) originating from both industrialized and clean areas and in clams exposed experimentally to metals. It has been shown previously that clams surviving Ag and Hg exposure at LT50 did not protect themselves by accumulating smaller amounts of metals than clams that failed to survive, so attention was focussed on the physicochemical forms of storage of the accumulated metals. Silver was found to be predominantly bound to insoluble forms and Cd and Hg to soluble forms. In both controls and contaminated clams, a metallothionein-like protein (MTLP) has been shown to be present, the concentrations of which did not depend on the geographical origin of the clams. The significant relationship between metal and MTLP concentrations shown in the baltic clams suggests that the induction of this protein could provide a useful tool for the biomonitoring of metal pollution. The influence of natural factors (season, weight), however, must be taken into account when interpreting such data.

Metallothionein-like metalloproteins in the Baltic clam Macoma balthica  : seasonal variations and induction upon metal exposure

1997 ◽  
Vol 129 (3) ◽  
pp. 453-463 ◽  
Author(s):  
G. Bordin ◽  
J. McCourt ◽  
F. Cordeiro Raposo ◽  
A. R. Rodriguez
Keyword(s):  
Seasonal Variations ◽  
Macoma Balthica ◽  
Metal Exposure ◽  
The Baltic

scholarly journals Physiological responses of Macoma balthica to copper pollution in the Baltic

1999 ◽  
Vol 22 (4) ◽  
pp. 431-439 ◽  
Author(s):  
Adam Sokolowski ◽  
Maciej Wolowicz ◽  
Herman Hummel ◽  
Roelof Bogaards
Keyword(s):  
Physiological Responses ◽  
Macoma Balthica ◽  
The Baltic ◽  
Copper Pollution

scholarly journals Metallothionein and Glutathione Content as Biomarkers of Metal Pollution in Mussels and Local Fishermen in Abu Qir Bay, Egypt

2016 ◽  
Vol 6 (12) ◽  
pp. 50-60 ◽  
Author(s):  
Aziza A. Saad ◽  
Amany El-Sikaily ◽  
Hany Kassem
Keyword(s):  
Oxidative Stress ◽  
Heavy Metals ◽  
Metal Pollution ◽  
The Body ◽  
Metal Exposure ◽  
Control Group ◽  
Blood Levels ◽  
Industrial Workers ◽  
High Concentrations ◽  
Abu Qir Bay

Background. When heavy metals accumulate in air, soil, and water, the risk of human exposure increases among industrial workers, as well as in people living near polluted areas. Heavy metals adversely affect a variety of bodily systems such as the cardiovascular, respiratory, endocrine, immune, and reproductive systems. In addition, long-term exposure and accumulation of heavy metals in the body may disturb oxidative stress genes and thus increase the susceptibility to various diseases. Objectives. The aim of this study is to estimate the metallothionein concentration in both mussel samples from Abu Qir Bay, Egypt and the blood of local fishermen as a biomarker of exposure to metal pollution. Methods. Levels of metallothionein and heavy metals were measured in mussels. Blood levels of metallothionein and heavy metals of local fishermen were measured and compared with a control group. The effect of heavy metal exposure on oxidative stress status was investigated through the determination of malondialdehyde (MDA), catalase and glutathione content. Results. The results of this study showed high concentrations of metallothionein in mussels and in fishermen's blood, accompanied by high concentrations of metals such as cadmium (Cd), copper (Cu), lead (Pb), chromium (Cr), and zinc (Zn). At the same time, a significant decrease in glutathione content and catalase enzyme activity was associated with a significant increase in the malondialdehyde concentrations in sera of fishermen. Conclusions. The present study found that the El Maadiya region is polluted with heavy metals, inducing oxidative stress in fishermen in the vicinity. These results reveal the necessity of further environmental monitoring in the study area in order to evaluate other types of pollutants and their effects on human health.

Ecotoxicity of contaminated sediments, a matter of bioavailability

1998 ◽  
Vol 37 (6-7) ◽  
pp. 225-231 ◽  
Author(s):  
N. H. B. M. Kaag ◽  
E. M. Foekema ◽  
M. C. Th. Scholten
Keyword(s):  
Dreissena Polymorpha ◽  
Sea Water ◽  
Feeding Habits ◽  
Macoma Balthica ◽  
Contaminated Sediments ◽  
Suspension Feeding ◽  
Simple Relationship ◽  
Filter Feeder ◽  
Arenicola Marina ◽  
The Baltic

Marine and freshwater mesocosm-scale experiments with contaminated sediments have shown that there is a direct relationship between the accumulated contaminant levels and the feeding habits of the organisms used. The highest levels of PAHs and PCBs were found in the sediment feeding lugworm Arenicola marina and in Tubifex worms. The levels of contaminants in the suspension feeding mussels Mytilus edulis and the zebra mussels, Dreissena polymorpha, were not influenced by the contaminant content of the sediments, but were related instead to the level of contaminants in the sea water above. Intermediate levels were found in the baltic tellin, Macoma balthica, which is a filter feeder as well as a deposit feeder, depending on the availability of food. These results show that there is no simple relationship between contaminant concentration in the sediments and bioavailability. Higher levels of contaminants do not necessarily lead to higher levels of these contaminants in Arenicola, due to differences in the sediment structure and the ageing of the contamination. On the other hand, toxic effects are related to the internal concentrations of certain chemicals. The internal concentrations observed in Arenicola may provide a good estimation of the true bioavailability of sedimentary contaminants and can also be used as an indicator for potential environmental effects.

Shell Deformations in the Baltic Clam Macoma balthica from Southern Baltic Sea (the Gulf of Gdansk): Hypotheses on Environmental Effects

AMBIO ◽  
2008 ◽  
Vol 37 (2) ◽  
pp. 93-100 ◽  
Author(s):  
Adam Sokołowski ◽  
Krzysztof Pawlikowski ◽  
Maciej Wołowicz ◽  
Pascale Garcia ◽  
Jacek Namieśnik
Keyword(s):  
Baltic Sea ◽  
Environmental Effects ◽  
Macoma Balthica ◽  
Gulf Of Gdańsk ◽  
Southern Baltic Sea ◽  
Gulf Of Gdansk ◽  
Southern Baltic ◽  
The Baltic

The relationship between metal concentrations and phenotypes in the Baltic clam Macoma balthica (L.) from the Gulf of Gdansk, southern Baltic

Chemosphere ◽  
2002 ◽  
Vol 47 (5) ◽  
pp. 475-484 ◽  
Author(s):  
Adam Sokolowski ◽  
Denis Fichet ◽  
Pascale Garcia-Meunier ◽  
Gilles Radenac ◽  
Maciej Wolowicz ◽  
...  
Keyword(s):  
Macoma Balthica ◽  
Gulf Of Gdańsk ◽  
Metal Concentrations ◽  
Gulf Of Gdansk ◽  
Southern Baltic ◽  
The Baltic ◽  
The Relationship

scholarly journals Second generation effects of larval metal pollutant exposure on reproduction, longevity and insecticide tolerance in the major malaria vector Anopheles arabiensis (Diptera: Culicidae)

2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Alexander C. S. N. Jeanrenaud ◽  
Basil D. Brooke ◽  
Shüné V. Oliver
Keyword(s):  
Malaria Vector ◽  
Metal Pollution ◽  
Cadmium Chloride ◽  
Polluted Water ◽  
Metal Exposure ◽  
Adult Longevity ◽  
Clean Water ◽  
Transgenerational Effects ◽  
Insecticide Tolerance ◽  
Major Malaria Vector

Abstract Background Members of the Anopheles gambiae complex breed in clean, sunlit temporary bodies of water. Anthropogenic pollution is, however, altering the breeding sites of the vectors with numerous biological effects. Although the effects of larval metal pollution have previously been examined, this study aims to assess the transgenerational effects of larval metal pollution on the major malaria vector An. arabiensis. Methods Two laboratory strains of An. arabiensis, SENN (insecticide-susceptible) and SENN-DDT (insecticide-resistant), were used in this study. After being bred in water polluted with either cadmium chloride, copper nitrate or lead nitrate, several life history characteristics that can have epidemiological implications (fertility, apoptotic damage to reproductive structures, adult longevity and insecticide tolerance) were examined in the adults and compared to those of adults bred in clean water. Results All metal treatments reduced fecundity in SENN, but only lead treatment reduced fertility in SENN-DDT. Cadmium chloride exposure resulted in apoptosis and deformation of the testes in both strains. After breeding generation F0 in polluted water, F1 larvae bred in clean water showed an increase in longevity in SENN-DDT adult females. In contrast, after breeding the F0 generation in polluted water, longevity was reduced after cadmium and copper exposure in the F1 generation. Larval metal exposure resulted in an increase in insecticide tolerance in adults of the SENN strain, with SENN-DDT adults gaining the greatest fold increase in insecticide tolerance. Conclusions This study demonstrates that a single exposure to metal pollution can have transgenerational effects that are not negated by subsequent breeding in clean water.

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