Background Chronic exposure to n-hexane can lead to peripheral neuropathy that no effective treatment regimen could be applied presently. This study investigated whether myelin protein zero （P0） protein and its anti...Background Chronic exposure to n-hexane can lead to peripheral neuropathy that no effective treatment regimen could be applied presently. This study investigated whether myelin protein zero （P0） protein and its antibody could be used to distinguish n-hexane intoxication and protect workers from peripheral neuropathy. Methods We compared P0 protein and its antibody among three levels of n-hexane-exposed groups, which included 18 patients with n-hexane-induced peripheral neuropathy as case group, 120 n-hexane-exposed workers as n-hexane- exposed control group, and 147 non-hexane-exposed participants used as control group. ELISA method was applied to detect P0 protein and its antibody. Results P0 protein in serum was significantly higher in the case group and n-hexane-exposed control group in comparison with the control group （P〈0.01）. Compared with the n-hexane-exposed control group, the case group also had significant increase of P0 protein （P〈0.01）. After 6 months therapy, P0 protein was observed to decrease significantly in the case group （P〈0.01）. The P0 antibody in serum was significantly higher in the n-hexane-exposed control group than in the control group （P〈0.01）, but not significantly different between cases and controls. Conclusions P0 antibodies in serum may be a short-term effect biomarker for n-hexane exposure. P0 protein in serum may be an early effective biomarker for peripheral nerve neuropathy and its biological limit value needs investigation in the future study.展开更多
Objective To investigate the role of myelin protein zero （P 0） in 2,5-hexanedione （2,5-HD）-induced peripheral nerve injury,and the protective effect of Ginkgo biloba extract （Egb761） on 2,5-HD-induced toxic peri...Objective To investigate the role of myelin protein zero （P 0） in 2,5-hexanedione （2,5-HD）-induced peripheral nerve injury,and the protective effect of Ginkgo biloba extract （Egb761） on 2,5-HD-induced toxic peripheral neuropathy.Methods After 4 weeks of treatment with 2,5-HD at different doses （50,100,200,400 mg/kg） in rats,changes in the levels of P 0 in rat sciatic nerves was investigated,and the effect of Egb761 on 2,5-HD-induced toxic peripheral neuropathy was studied.Results The blood-nerve barrier （BNB） permeability of the sciatic nerve increased,and the expression of P 0 mRNA and P 0 protein decreased in a dose-dependent manner after treatment with 2,5-HD for 4 weeks.Pretreatment with Egb761 protected against BNB interruption,and inhibited P 0 mRNA and protein reduction during 2,5-HD treatment.Pretreatment with Egb761 significantly reduced loss of body weight （P0.01） and mitigated gait abnormalities （2.85±0.22） induced by 400 mg/kg 2,5-HD （P0.01）.It also reduced the signs of neurotoxicity induced by 2,5-HD.Conclusion 2,5-HD inhibited the expression of P 0 in a dose-dependent manner,and this may be an important mechanism by which toxic peripheral neuropathy is induced by 2,5-HD.Egb761 has a protective effect against 2,5-HD-induced peripheral neurotoxicity in rats.展开更多
文摘Background Chronic exposure to n-hexane can lead to peripheral neuropathy that no effective treatment regimen could be applied presently. This study investigated whether myelin protein zero （P0） protein and its antibody could be used to distinguish n-hexane intoxication and protect workers from peripheral neuropathy. Methods We compared P0 protein and its antibody among three levels of n-hexane-exposed groups, which included 18 patients with n-hexane-induced peripheral neuropathy as case group, 120 n-hexane-exposed workers as n-hexane- exposed control group, and 147 non-hexane-exposed participants used as control group. ELISA method was applied to detect P0 protein and its antibody. Results P0 protein in serum was significantly higher in the case group and n-hexane-exposed control group in comparison with the control group （P〈0.01）. Compared with the n-hexane-exposed control group, the case group also had significant increase of P0 protein （P〈0.01）. After 6 months therapy, P0 protein was observed to decrease significantly in the case group （P〈0.01）. The P0 antibody in serum was significantly higher in the n-hexane-exposed control group than in the control group （P〈0.01）, but not significantly different between cases and controls. Conclusions P0 antibodies in serum may be a short-term effect biomarker for n-hexane exposure. P0 protein in serum may be an early effective biomarker for peripheral nerve neuropathy and its biological limit value needs investigation in the future study.
基金supported by the National Nature Science Foundation of China (No.30700674 and No.30625031)the Project for Technologies of Occupational Health Surveillance and Detection (200902006)the Youth Fund of Chinese Center of Disease Control (2010A204)
文摘Objective To investigate the role of myelin protein zero （P 0） in 2,5-hexanedione （2,5-HD）-induced peripheral nerve injury,and the protective effect of Ginkgo biloba extract （Egb761） on 2,5-HD-induced toxic peripheral neuropathy.Methods After 4 weeks of treatment with 2,5-HD at different doses （50,100,200,400 mg/kg） in rats,changes in the levels of P 0 in rat sciatic nerves was investigated,and the effect of Egb761 on 2,5-HD-induced toxic peripheral neuropathy was studied.Results The blood-nerve barrier （BNB） permeability of the sciatic nerve increased,and the expression of P 0 mRNA and P 0 protein decreased in a dose-dependent manner after treatment with 2,5-HD for 4 weeks.Pretreatment with Egb761 protected against BNB interruption,and inhibited P 0 mRNA and protein reduction during 2,5-HD treatment.Pretreatment with Egb761 significantly reduced loss of body weight （P0.01） and mitigated gait abnormalities （2.85±0.22） induced by 400 mg/kg 2,5-HD （P0.01）.It also reduced the signs of neurotoxicity induced by 2,5-HD.Conclusion 2,5-HD inhibited the expression of P 0 in a dose-dependent manner,and this may be an important mechanism by which toxic peripheral neuropathy is induced by 2,5-HD.Egb761 has a protective effect against 2,5-HD-induced peripheral neurotoxicity in rats.
