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Research Article

Dynamics of Malondialdehyde Depending on Cadmium Concentration and their Relation with the Daily Weight Gain on the Chicken Hybrid

Imer Haziri, Arben Haziri, Enkeleda Ozuni and Ibrahim Mehmeti
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Objective: The aim of this study was to determine the effect of cadmium (Cd) on the level of phospho-lipids peroxidation, by measuring the level of malondialdehyde (MDA) and study the changes on body weight of egg-laying breed chickens. Methodology: Total four groups of chickens have been included in the experiment. Three groups treated with different concentrations of cadmium (2, 4 and 6 mg kg–1 of live weight added in drinking water) and one group as a control without treatment with Cd. The data were analyzed statistically by using SPSS software package. ANOVA test and the medium and standard error of the mean were presented. Results: The result shows that, level of malondialdehyde in blood is increased by increasing the cadmium on daily diet of chicken. On the control group, the MDA level was 17 μmol L–1 when we have treat with cadmium 2 mg kg–1 the level increase amounts twice (30 μmol L–1), on the 3rd group 44 μmol L–1 when was supplemented with 4 mg kg–1, while on the 4th group (supplemented with 6 mg kg–1 Cd) it reach up to 64 μmol L–1. In another hand, body weight of egg-layer chicken in three different times point, supplemented with different amount of Cd shows to be different. When the chickens was not treated with Cd body weight on last days reach up to 1114 g while by adding the Cd on feed the body weight has decrease to 734 g. Conclusion: It can be concluded that, MDA is increase by increasing the cadmium concentration on daily diet. This is due to makes difficulties on peroxidation of the lipids or proteins on body chickens and also plays negative effects on increasing the body weights. Also the body weight of the egg-laying breed chickens was decreased by feeding the chicken with Cd indicating that Cd plays a negative effect on feeds and most probably on the quality of the meat.

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Imer Haziri, Arben Haziri, Enkeleda Ozuni and Ibrahim Mehmeti, 2017. Dynamics of Malondialdehyde Depending on Cadmium Concentration and their Relation with the Daily Weight Gain on the Chicken Hybrid. Asian Journal of Animal and Veterinary Advances, 12: 38-43.

DOI: 10.3923/ajava.2017.38.43



Cadmium (Cd) is known to be a toxic heavy metal that poses a hazard to animal health due to its toxicological effects1,2. Based on the effect of the toxicity, the cadmium can be found in different types and can be accumulate in human and animal body. The most toxic type of cadmium salt is the cadmium oxide, less toxic is cadmium sulfate whereas the cadmium chloride occupies an intermediary position3,4. The permissible dosage of cadmium is varied differently in human and animal body. Even, these differences varied differently on diet and concentrated in different organs and amounts5. In the egg-laying breed chickens the likelihood of cadmium toxicity can be assessed (as normal, high and toxic range) from cadmium concentration in the diet, kidney and liver and the level of cadmium as a toxic is >40 mg kg–1 DM6. The influence of cadmium in the metabolism of calcium in the osseous tissue accompanied with the emergence of osteomalacia and remodeling of osseous tissue7. This reaction is more abundant when the cadmium applied for at least 6 months in dosage of 25 mg L–1 of drinkable water8,9.

A study carried out by Watjen and Beyersmann10 determined that cadmium ions have direct impact on the metabolism of calcium and structure of osseous tissue. Another mechanism of reaction of cadmium ions is supposed to be the decrease of calcium absorption from the digestion apparatus because of impediment of activation of D3 vitamin in the renal cortex11. Cadmium ions have an impact in the growth of peroxidation processes that leads to impediment of growth rhythm) points out that the effect of cadmium ions in impediment of the growth is proportional to the cadmium intake amount on daily basis12. Previously was points out that the cadmium disposal at the amount of 100 ppm causes slight impediment in increase of live weight, biochemical and hematological changes, kidney damage, bursa of fabricius, liver and osseous tissue. Growth of free radicals in proportion to the cadmium intake dosage causes not only lipid peroxidation which contain insatiable fatty acids and highly insatiable13. In this way the growth of concentration of malondialdehyde (MDA), this also causes peroxidation of deoxiribonucleic which in turn cause damage of DNA structure14-16.

The aim of this study was to determine the level of peroxidation of phospho-lipids, by measuring the level of malondialdehyde and its impact on body weight of egg-laying breed chickens using cadmium.


Four groups of chickens ("Isa Brown" hybrid) have been included on experiment. Each group contains six egg-laying breed chickens. All chickens were placed in cages two by two per one cage. Egg-laying breed chickens were treated for a month in the preparatory period with the same food portion and were weighed at the end of this period. Following completion of this procedure, the experimental period commenced. The first group was selected as a control group, the 2nd group was treated with cadmium chloride supplement of 2 mg kg–1 cadmium of live weight, the 3rd group was treated with 4 mg kg–1 cadmium and the 4th group was treated with 6 mg kg–1 cadmium of live weight.

This treatment continued for a month when the second weighing took place. After the period of another 25 days, the third weighing took place. The whole experimental period continued for 55 days. Food treatment was the same for four groups during the experimental period. Based on the weighing data, the difference between the first weighing and the second weighing was calculated, as well as the difference between the second weighing and the third weighing. On the 55 days of experimental period, we have analyzed the level of MDA in the blood of the "Isa Brown" hybrid by using spectophotometer at the Faculty of Agriculture and Veterinary at the University of Pristina. Working procedure is performed based on kit guidance (BIOXYTECHÒ MDA-586™). In brief for each sample is taken a tube, where in each tube is placed 10 μL of probucol, 100 μL of blood plasma (sample) and 640 μL of reagent R1. Then, after we mixed the samples and we added 150 μL of second reagent R2 and incubated at 45°C for 60 min followed by centrigugation for 10 min at 10000×g until the supernatant obtained clean. In the end, the supernatant is transfered via automatic pipets to the spectrophotometric UV-Vis (SECOMAM, Anthelie advanced 5) kuvets and the measurements were done on 586 nm wavelength.

The obtained data were analyzed statistically by using ANOVA test processed by determining for each group the medium and standard error of the mean (SEM), the validation of the MDA level change among groups, including the coefficients of correlation between the MDA level and daily live weight gain, including the data of difference of weight gain between the first weighing and second weighing, as well as between the second weighing and third weighing.


Previously is known that, reactive oxygen species depredate polyunsaturated lipids, forming malondialdehyde which is a reactive aldehyde and it can cause toxic stress in cells and form covalent proteins adducts referred to as advanced lipoxidation end-products5. The MDA level represents a level increase in addition to the increase of supplemented cadmium chloride on egg-laying breed chicken under growth. On the control group, the MDA level was 17 μmol L–1, while in the 2nd group the level increase amounts twice (30 μmol L–1), on the 3rd group 44 μmol L–1, while on the 4th group it reach up to 64 μmol L–1. These results are presented in Table 1.

Regarding to coefficient of variation it is observed that the diversity of individuals is low in the first group (CV = 1.1), whereas in the experimental groups the diversity of each individual group is higher (variation from 6.5-9.5%). These data prove that the reaction among chickens is not the same against the level of cadmium ions taken through gastrointestinal apparatus.

The values from Table 2 represent the data when we have measured the body weight of the egg-layer chickens in three different times point and different cadmium concentration. The results show that, body weight of chickens goes up from 300 g to approximately 1200 g without supplemented with cadmium while on the samples treated with cadmium is lower. The result shows that, as higher the cadmium concentration is added on the chickens the body weight is lower.

The differences between the first groups and other groups, including the validation of difference between them indicates that in the beginning of the experiment the chicken’s body weight was statistically the same while the difference of the live weight in the first measurement among these groups represented differences with high statistical validation. These data support the dynamic that was determined in the experimental study. These results prove that the dynamic of live weight gain at the end of preparatory period has no statistically validated changes between the first group and three other experimental groups. However, as far as the changes at the third stage of the experiment are concerned, it can be observed that changes were statistically validated for a high level (p>0.001). Previously it was reported that, correlation between the weight gains on chickens does not represent any significant correlation with the MDA level on blood17. This is in agreement with our finding.

In Table 3 are shown the body weight differences between different treatments presented on percentage. The result shows that, the body weight was decreased from first measurement to the end (approximately 83% first measurement while 64% in the third measurement).

Table 1:Dynamics of MDA concentration in blood depending on the cadmium chloride dosage expressed in M±SEM (n = 6)

Table 2:Chickens body weight gain depending on the supplementation with cadmium expressed in gram
M±SEM and CV: Coefficients of variation

Table 3:Live weight of chickens during three measuring occasions according to the groups expressed in percentage (first group is considering 100%)


In the present study level of MDA was measured on egg-laying breed chicken when different concentration of cadmium (2, 4 and 6 mg kg–1) was supplemented on feed. The final product of polyunsaturated fatty acids peroxidation in the cells is known to be MDA18,19. Overproduction of MDA will come by increasing the free radicals and frequently is used as a marker of oxidative stress and the antioxidant in cancerous patients20. In another hand, the toxic effect of heavy metals are reported especially cadmium which has been shown to be one of the most toxic metals in environment21,22. From gastrointestinal tract Cd was absorbed on the kidney and liver where this element binds to metallothionein (MT) and by blood can cause toxicity in varouls tissues and organs23. In this experiment we treated the egg-layer chicken with different Cd concentration supplemented on feed and level of MDA was measure in the end of the experiment. The result shows that, that by increasing the feed with Cd, level of MDA significantly increase compare with control at the end of the study period (Table 1). In previous study by Liu et al.24 shows increase the level of cadmium cause high toxicity and most of the accumulation of this element was on kidney causing apoptosis.

More study showing the effect of cadmium in MDA level has been shown also in other animals such as in rate25 showing that Cd accumulation is different in various organs with highly accumulated on kidney and manifesting different disease24. By increasing the body weight the oxidative stress is caused. In line with that are several studies which has promoted also previously showing that Cd promot oxidative stress by causing mitochondrial dysfunction on kidney cells25,26. While, Hagar and Al Malki27 reported that cadmium treatment reduced antioxidative activity in rates. In another studies shows oxidative demage is cause when the Cd is high oin body of mice and induced renal appoptosis28,29. This indicating that cadmium led to renal oxidative damage and induced renal apoptosis in mice and also decrease the MDA level. In contrast from our result, other studies show that level of lipid peroxidation was decreased by adding Cd30,31. This probably due to the different organs accumulates cadmium differently (liver, kidney and testis) after chronic exposure32,33. When the levels of MDA from different organs are differently is necessary to measure MDA level on blood is more adequate than on other specific organs. In the current study, we also found that Cd significantly decreased the body weight of the egg loyed chicken significantly by adding high amount of Cd on feed. Interestingly some of the previous data are in disagreement compare to our result. Erdogan et al.34 has reported that, when animals was offered limited feed or low quality of feed or when the quality of feed was low and degradation of lipids and proteins are increased as a result of cadmium toxicity and the lewel of cadmium accumulation was higher for long time in body weight the animals become chronic toxicity manifested by different disease in human and animal body35. Our result presented on Table 2 shows significant differences by increasing the level of supplemented Cd incorporated with water in higher amounts and analyzed between contaminated and controls egg-laying breed chickens.

Interestingly, in rates when the Cd was supplemented on feed, the feed wasn’t consumed from rates and in same time the body weight of them was decreased which is in contrast compared from our result when the water supplemented with Cd was consumed fine. This is probably due to the importance of water in human and animal body. When different heavy metals were add in chickens and experiment was performed for 8 weeks it is observed a decrease in the dynamic of weight gain depending on the dosage of supplemented cadmium on diet36. At the end of 8 weeks’ period, the researchers determined that the live weight amounts to 2230 g in the control group whereas the live weight amounts to 1070 g in the group with 30 ppm. These data are in agreements with our result and we conclude that heavy metals especially Cd adding on the feed plays a role in decreasing the performance of body weight of the chickens. When we transfer the data in percentage, the results from the horizontal point of view shows that, the group measuring in first time comparing with the control group, the body weight decreases to 83.5% in the 2nd group and up to 75% in the 4th group are presented in Table 3. Same result has been found and during the second and third measuring. While when the data we see on the vertical comparison, we can determine the similar result only the values where low. Also, Bokori et al.37 in their studies reported when the cadmium was exposed in chicken the body weight was decreased and every prolongation of dietary cadmium becomes on mortality of the chickens38. Interestingly, our result shows that, no differences on drinking waters between different treatments and different days until the end of experiment was seen. This is probably due to the toxic effects of Cd performance. However, to confirm both hypotheses, explaining how Cd effects on body weight and relation of MDA on different organs and blod further studies on the different concentration of Cd needs to add and MDA to measure on different organs are necessary.


The data in this study indicate that level of malondialdehyde in blood increase by increasing supplemented cadmium chloride in egg-laying breed chickens diet. The MDA is an indication for presence of cadmium. When the level of MDA is higher Cd is present very high in the body weight of the animal and it makes difficulties on peroxidation of the lipids or proteins on body weight of the chickens. By increasing the level of Cd the body weight of egg-laying breed chickens was decrease and the cadmium toxicity is higher even the meat is not allowed to use for consumer.


The authors are grateful to our friend Ylber Haziri for technical help and Faculty of Agriculture and Veterinary for giving up the opportunity to do the experimental work.

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