Chelation therapy of manganese intoxication with para-aminosalicylic acid (PAS) in Sprague-Dawley rats.
Chelation therapy of manganese intoxication with para-aminosalicylic acid (PAS) in Sprague-Dawley rats.
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DOI:
10.1016/j.neuro.2008.12.007
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发表时间:
2009-03
期刊:
影响因子:
3.4
通讯作者:
Cowan DM
中科院分区:
文献类型:
--
作者:
Zheng W;Jiang YM;Zhang Y;Jiang W;Wang X;Cowan DM
Para-aminosalicylic acid (PAS), an FDA-approved anti-tuberculosis drug, has been used successfully in the treatment of severe manganese (Mn)-induced Parkinsonism in humans. This study was conducted to explore the capability of PAS in reducing Mn concentrations in body fluids and tissues of Mn-exposed animals. Sprague-Dawley rats received daily intraperitoneally (i.p.) injections of 6 mg Mn/kg, 5 d/wk for 4 wks, followed by a daily subcutaneously (sc.) dose of PAS (100 and 200 mg/kg as the PAS-L and PAS-H group, respectively) for another 2, 3 or 6 wks. Mn exposure significantly increased the concentrations of Mn in plasma, red blood cells (RBC), cerebrospinal fluid (CSF), brain and soft tissues. Following PAS-H treatment for 3 wks, Mn levels in liver, heart, spleen and pancreas were significantly reduced by 25 to 33%, while 3 wks of PAS-L treatment did not show any effect. Further therapy with PAS-H for 6 wk reduced Mn levels in striatum, thalamus, choroid plexus, hippocampus and frontal cortex by 16 to 29% (p<0.05). Mn exposure greatly increased iron (Fe) and copper (Cu) concentrations in CSF, brain and liver. Treatment with PAS-H restored Fe and Cu levels comparable with control. These data suggest that PAS likely acts as a chelating agent to mobilize and remove tissue Mn. A high-dose and prolonged PAS treatment appears necessary for its therapeutic effectiveness.
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DOI:
10.1097/01.jom.0000116900.49159.03
发表时间:
2004-03-01
影响因子:
3.2
作者:
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DOI:
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影响因子:
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影响因子:
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作者:
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通讯作者:
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