Huwait Etimad A, Kumosani Taha A, Moselhy Said S, Mosaoa Rami M, Yaghmoor Soonham S
Biochemistry Department, Faculty of Science King Abdulaziz University, Jeddah, Saudi Arabia; Experimental Biochemistry Unit, King Fahd Medical Research Center. King Abdulaziz University; Vitamin D Pharmacogenomics Research Group, King Abdulaziz University.
Biochemistry Department, Faculty of Science King Abdulaziz University, Jeddah, Saudi Arabia; Experimental Biochemistry Unit, King Fahd Medical Research Center. King Abdulaziz University; Productions of Bioproducts for Industrial Applications Research Group, King Abdulaziz University.
Afr Health Sci. 2015 Sep;15(3):993-8. doi: 10.4314/ahs.v15i3.38.
This study aimed to analyze the agricultural soils from different regions in Saudi Arabia for cobalt and related metals as Cu(2+), Ni(2+), Cr(3+), Zn(2+) and Pb(2+).
Liver and muscle tissues of livestock grazing on the selected areas were analyzed for the content of Co and vitamin B12.
Our results indicated that the levels of Co in surface soil (0-15 cm) were higher than in sub-surface soil (>15 cm-45 cm). In contrast, Pb and Zn were higher in sub-surface soil than in surface soil. A significant positive correlation existed between the levels of Co and vitamin B12 in the liver of livestock. However, Co was not detected in muscle tissues while vitamin B12 was present at very low levels in comparison with the levels found in the liver. The results indicated that Zn(2+), Pb(2+) compete with Co in soil, which eventually affected the levels of vitamin B12 in liver.
It was recommended that survey of heavy metals in grazing fields of cattle should consider inclusion of multiple elements that compete with the bioavailability of essential elements in plants and animals for the prevention of deficiency of essential elements such as Co.
本研究旨在分析沙特阿拉伯不同地区农业土壤中的钴及相关金属，如铜离子（Cu(2+)）、镍离子（Ni(2+)）、铬离子（Cr(3+)）、锌离子（Zn(2+)）和铅离子（Pb(2+)）。
对在选定区域放牧的牲畜的肝脏和肌肉组织进行钴和维生素B12含量分析。
我们的结果表明，表层土壤（0 - 15厘米）中的钴含量高于次表层土壤（> 15厘米 - 45厘米）。相反，次表层土壤中的铅和锌含量高于表层土壤。牲畜肝脏中钴含量与维生素B12含量之间存在显著正相关。然而，肌肉组织中未检测到钴，而与肝脏中发现的水平相比，维生素B12的含量非常低。结果表明，锌离子（Zn(2+)）、铅离子（Pb(2+)）在土壤中与钴竞争，最终影响了肝脏中维生素B12的水平。
建议在牛的放牧场地进行重金属调查时，应考虑纳入多种与动植物必需元素生物有效性竞争的元素，以预防钴等必需元素的缺乏。
