Seafood Consumption and Blood Cadmium Level of Respondents along the Coastal Area of Melaka, Malaysia

Abstract@#Introduction: Eating seafood has become a major health concern for many people due to the present of heavy metal especially cadmium (Cd). Cd can accumulate in the body and disrupt the normal cellular processes which will eventually lead to organ damage. This study aims to determine the seafood consumption pattern and blood cadmium (BCd) as well as the association between these two variables among respondents living along the coastal area of Melaka. Methods: Pretested questionnaires were used to collect background and food frequency intake from coastal villagers through convenient sampling method. Venous blood samples were analysed by using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) for BCd determination. Results: A total of 63 respondents who 54% were female with median age of 34 years old provided complete data in this study. The most frequently consumed seafood and its product were shrimp paste (31.5%) followed by mackerel (13.6%), hardtail-scad (6.2%), flatfish (4.5%) and fish ball (4.0). All blood samples showed the present of Cd with median (IQR) = 0.076 (0.1) μg/L and ranged between 0.007 to 1.284 μg/L. The finding showed no association between frequently consumed seafood and low BCd of the respondents. On the other hand, gender was found to be significantly associated with the BCd. Conclusion: Seafood consumption pattern was not significantly associated with BCd which suggests that frequent seafood consumption may not contribute much to BCd level among the respondents as well as it may indicates safe consumption of these seafood available in the study location.

Study on the dosage of GMDTC for removing cadmium / 中国职业医学

OBJECTIVE: To explore different doses of sodium(s)-2-(dithiocarboxylato((2R,3R,4R,5R,6R)-2,3,4,5,6-pentahydroxyhexyl) amino)-4-(methylthio) butanoate(GMDTC) for removing cadmium. METHODS: Thirty-five male New Zealand rabbits were randomly divided into blank control group,GMDTC high dose control group,model control group,ethylene diamine tetraacetic acid(EDTA) control group and GMDTC low,medium and high dose groups,five rabbits in each group. The blank control group and GMDTC high dose control group were given 0. 90% normal saline solution intravenously; model control group,EDTA control group and GMDTC low,medium and high dose group were given 2 μmol/kg of cadmium chloride(CdCl_2) and 40 μmol/kg of β-mercaptoethanol mixed solution intravenously,5. 0mL/kg body weight(bw),once a day for five days. On the forty-one day of the experiment(the fist day of GMDTC treatment),the control group and the model control group were injected 0. 90% normal saline solution 250 mL via ear vein,the EDTA control group was given EDTA solution at the dose of 93. 5 mg/kg bw with 250 mL 0. 90% normal saline solution,also via ear vein; the GMDTC high dose control group,and the GMDTC low,medium and high dose groups were given 250 mL GMDTC solution at the concentration of 108.0,12.0,36.0 and 108. 0 mg/kg bw with 0. 90% normal saline by intravenous infusion,once a day,6 times a week for four consecutive weeks. The urine β_2-microglobulin(MG),renal cadmium,blood cadmium,and urinary cadmium before and after the treatment were detected. RESULTS: The body weight of New Zealand rabbits increased with the increasing feed time(P < 0. 01). The levels of β_2-MG before treatment increased in model control group,EDTA control group,GMDTC low,medium and high dose groups than that in the blank control group(P < 0. 01). The levels of renal cadmium after treatment in GMDTC medium and high dose groups decreased compared with those in the blank control group and EDTA control group respectively(P < 0. 05). The blood cadmium after treatment in EDTA control group,GMDTC low,medium and high dose groups were decreased compared with those before treatment in the same group respectively(P < 0. 05),meanwhile decreased than the blood cadmium after treatment in the model control group respectively(P < 0. 05). The blood cadmium after treatment had not a statistically significant difference among the EDTA control group,GMDTC medium and high dose groups(P < 0. 05). At all the time points(1,6,8,13,15,20,22 and 28 days after treatment),the urinary cadmium after treatment in EDTA control group and the three GMDTC dose groups increased compared to the model control group at the same time(P < 0. 05). The urinary cadmium after treatment increased with GMDTC dose increased at the other six time points,expect on 20 and 22 days after treatment(P < 0. 05). The blood cadmium removal rates after treatment were 70. 06%,74. 86% and 78. 05% and the renal cadmium removal rates were 14. 27%,27. 95% and 61. 24% in GMDTC low,medium and high dose groups,respectively. CONCLUSION: The intravenous infusion of GMDTC at the dose of 108. 0 mg/kg bw effectively removed cadmium in cadmium poisoning rabbit. This dose had no obvious toxic effect and was equivalent to human dose of 36. 0mg/kg bw which meets the requirement of new drug property.

Blood Cadmium Concentration of Residents Living near Abandoned Metal Mines in Korea

The purpose of this study was to investigate demographic and lifestyle variables and blood cadmium concentrations in residents living near abandoned metal mines in Korea. Blood cadmium concentrations were measured in 15,161 subjects living around abandoned metal mines (exposed group, n = 14,464) and compared with those living in designated control areas (control group, n = 697). A questionnaire was provided to all subjects to determine age, gender, mine working history, times of residence, smoking habits and dietary water type. The geometric mean (95% confidence intervals) of blood cadmium concentration (1.25 [1.24-1.27] microg/L) in the exposed group was significantly higher than in the control group (1.17 [1.13-1.22] microg/L). Mean residence time and mine working history in the exposed group were significantly higher than in the control group. Blood cadmium concentrations increased with increasing age, and residence time in both groups, and blood cadmium concentrations were higher in current-smokers than in non-smokers in both groups. This study shows the geometric mean of blood cadmium concentration in abandoned mining areas are higher than in non-mining areas in the general adult Korean population.

A study on dietary habits, health related lifestyle, blood cadmium and lead levels of college students

This study was performed in order to investigate dietary habits, health related lifestyle and blood cadmium and lead levels in female college students. 80 college students (43 males and 37 females) participated in the survey questionnaires. Body weight and height, blood pressure, and body composition were measured. The systolic blood pressure of male and female students were 128.9 +/- 13.9 and 109.8 +/- 12.0, respectively. The diastolic blood pressure of male and female students were 77.1 +/- 10.3 and 66.0 +/- 6.9, respectively, showing that male students had significantly higher blood pressure than female students (P < 0.001). The BMI of male and female students were 23.4 +/- 3.3 and 20.2 +/- 2.3, respectively. Most male students were in the range of being overweight. The dietary habits score of female students was significantly higher than that of male students (P < 0.01).The blood cadmium level of male and female students were 0.54 +/- 0.23 and 0.52 +/- 0.36, respectively. There was no significant difference between male and female students. The blood lead level of male and female students were 1.09 +/- 0.49 and 0.59 +/- 0.45, respectively. The blood lead level of male students was significantly higher than that of female students (P < 0.001). The blood cadmium level of smokers and nonsmokers were 0.69 +/- 0.29 and 0.49 +/- 0.29 respectively (P < 0.05). The blood cadmium level of smokers was significantly higher than that of nonsmokers (P < 0.05). The blood lead level of smokers and nonsmokers were 1.09 +/- 0.43 and 0.80 +/- 0.54, respectively. The blood lead level of smokers was significantly higher than that of nonsmokers (P < 0.05). Therefore, proper nutritional education programs are required for college students in order to improve their dietary and health related living habits.

The Effects of Smoking and Drinking on Blood Lead and Cadmium Levels: Data from the Fourth Korea National Health and Nutrition Examination Survey / 대한산업의학회지

OBJECTIVES: The purpose of this study is to assess the effects of smoking and drinking on blood lead and cadmium levels based on a dose-response relationship in the general Korean adult population. METHODS: The study population consisted of 1,901 Koreans, who took part in the 2008 Korean National Health and Nutrition Examination Survey, in which blood lead and cadmium levels were measured. Geometric mean concentrations and their 95% confidence intervals of metals in blood were estimated by analysis of covariance (ANCOVA) adjusting for demographic and lifestyle factors. RESULTS: We observed a statistically significant dose-response relationship with daily smoking amount/alcohol intake and blood lead/cadmium levels. While daily smoking amount was more consistent with blood cadmium level (0.1-0.2 microg/L per 5 cigarettes), blood lead concentrations were higher as daily alcohol intake increased (0.1-0.2 microg/dL per 10 gram of alcohol). CONCLUSIONS: Our findings clearly support a relationship between daily smoking amount/alcohol intake and blood lead/cadmium levels, suggesting an additional reason towards efforts to reduce smoking and drinking habits.

Blood and Urinary Cadmium Concentration of Residents around Abandoned Metal Mines in Busan and Gyeongsangnam-do / 대한산업의학회지

OBJECTIVES: To evaluate the blood and urinary cadmium concentration levels of around abandoned metal mines in comparison with a control group. METHODS: Blood and urinary cadmium concentration levels were analyzed through investigations of the dietary habits and dietary water of subjects living near abandoned metal mines (exposure group) (n=190) in comparison with those living in designated control areas (control group) (n=256). RESULTS: The blood cadmium (1.93 microgram/l) and urinary cadmium (2.41 microgram/g cr) concentrations of the exposure group were significantly higher than those of the control group (blood cadmium: 1.19 microgram/l, urinary cadmium: 1.94 microgram/g cr). Both concentrations were significantly higher in vegetarians in both groups. CONCLUSIONS: The exposure group had higher blood and urinary cadmium concentrations than the control group. We attributed the elevated blood and urine cadmium levels in the abandoned mine residents to the influence of the abandoned mine sites.

Assessment of Cadmium in Blood and Urine of Occupationally Exposed Workers and Renal Dysfunction by Cumulative Exposure Estimate / 대한산업의학회지

88 workers exposed to cadmium were examined at the 12 factories using or producing cadmium in order to know the present state of cadmium exposure and renal dysfunction in 1992. Cadmium in blood and in urine were measured and compared by the 3 exposure level of cadmium in air. Cadmium in blood of low, moderate and high exposure group were 2.5, 3,8 and 7.6 microgram/L, respectively. Cadmium in urine were 1.8(1.3), 3.8(2,6) and 7.9 microgram/L(6.1 microgram/g creatinine) , resrectively. However, there was no relationship between Urinary cadmium and beta(2)-microglobulin. Cumulative exposure estimate (CEE) was calculated by multiplying the mean ambient cadmium level of the factory and working duration. CEE has a high correlation with cadmium in blood and urine, but no relation to beta(2)-microglobulin. Because working durations were relatively shorter than European workers', the highest CEE was just 300 microgram. year/m(3), which was not enough to induce renal tubular dysfunction. This study, however, suggested the possibility that renal tubular dysfunction caused by cadmium could be happened in Korea in the near future.