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Manganese Distribution in Brains of Sprague Dawley Rats after 60 Days of Stainless Steel Welding-Fume Exposure
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  • Manganese Distribution in Brains of Sprague Dawley Rats after 60 Days of Stainless Steel Welding-Fume Exposure
  • Manganese Distribution in Brains of Sprague Dawley Rats after 60 Days of Stainless Steel Welding-Fume Exposure
저자명
Yu. Il-Je,Park. Jung-Duck,Park. Eon-Sub,Song. Kyung-Seuk,Han. Kuy-Tae,Han. Jeong-Hee,Chung. Yong-Hyun,Choi. Byung-Sun,Chung. Kyu
간행물명
Environmental mutagens and carcinogens
권/호정보
2003년|23권 3호|pp.85-93 (9 pages)
발행정보
한국환경성돌연변이발암원학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

Welders working in a confined space, like in the shipbuilding industry, are at risk of being exposed to high concentrations of welding fumes and developing pneumoconiosis or other welding-fume exposure related diseases. Among such diseases, manganism resulting from welding-fume exposure remains a controversial issue, as the movement of manganese into specific brain regions has not been clearly established. Accordingly, to investigate the distribution of manganese in the brain after welding-fume exposure, male Sprague Dawley rats were exposed to welding fumes generated from manual metal arc stainless steel (MMA-SS) at concentrations of $63.6{pm}4.1$ $mg/m^3$ (low dose, containing 1.6 $mg/m^3$ Mn) and $107.1{pm}6.3$ $mg/m^3$ (high dose, containing 3.5 $mg/m^3$ Mn) total suspended particulates for 2 hrs per day, in an inhalation chamber over a 60-day period. Blood, brain, lungs and liver samples were collected after 2 hr, 15, 30, and 60 days of exposure and the tissues analyzed for their manganese concentrations using an atomic absorption spectrophotometer. Although dose- and time-dependent increases in the manganese concentrations were found in the lungs and livers of the rats exposed for 60 days, only slight manganese increases were observed in the blood during this period. Major statistically significant increases in the brain manganese concentrations were detected in the cerebellum after 15 days of exposure and up until 60 days. Slight increases in the manganese concentrations were also found in the substantia nigra, basal ganglia (caudate nucleus, putamen, and globus pallidus), temporal cortex, and frontal cortex, thereby indicating that the pharmacokinetics and distribution of manganese inhaled from welding fumes would appear to be different from those resulting from manganese-only exposure.