Cypermethrin alters the status of oxidative stress in the peripheral blood: relevance to Parkinsonism.

Abstract

Parkinson's disease (PD) is a motor scarcity disorder characterized by the striatal dopamine deficiency owing to the selective degeneration of the nigrostriatal dopaminergic neurons. While oxidative stress is implicated in PD, prolonged exposure to moderate dose of cypermethrin induces Parkinsonism. The study aimed to investigate the status of oxidative stress indicators and antioxidant defence system of the polymorphonuclear leukocytes (PMNs), platelets and plasma to delineate the effect of Parkinsonian dose of cypermethrin in the peripheral blood of rats and its subsequent relevance to Parkinsonism. Nitrite content, lipid peroxidation (LPO) and activity of superoxide dismutase (SOD), catalase, glutathione reductase (GR) and glutathione-S-transferase (GST) were measured in the PMNs, platelets and plasma of control and cypermethrin-treated rats in the presence or absence of a microglial activation inhibitor, minocycline or a dopamine precursor containing the peripheral 3,4-dihydroxyphenylalanine decarboxylase inhibitor, named syndopa, employing the standard procedures. The striatal dopamine was measured to assess the degree of neurodegeneration/neuroprotection. Cypermethrin increased nitrite and LPO in the plasma, platelets and PMNs while it reduced the striatal dopamine content. Catalase and GST activity were increased in the PMNs and platelets; however, it was reduced in the plasma. Conversely, SOD and GR activities were reduced in the PMNs and platelets but increased in the plasma. Minocycline or syndopa reduced the cypermethrin-mediated changes towards normalcy. The results demonstrate that cypermethrin alters the status of oxidative stress indicators and impairs antioxidant defence system of the peripheral blood, which could be effectively salvaged by minocycline or syndopa. The results could be of value for predicting the nigrostriatal toxicity relevant to Parkinsonism.

• Authors: Pratibha Tripathi, Ashish Singh, Sonal Agrawal, Om Prakash, Mahendra Pratap Singh
• Journal: Journal of physiology and biochemistry (J Physiol Biochem) Vol. 70 Issue 4 Pg. 915-24 (Dec 2014) ISSN: 1877-8755 [Electronic] Spain
• PMID: 25270427 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Insecticides
• Nitrites
• Pyrethrins
• cypermethrin
• Catalase
• Superoxide Dismutase
• Glutathione Transferase
• Minocycline
• Dopamine

Topics

• Animals
• Catalase (metabolism)
• Corpus Striatum (drug effects, metabolism)
• Dopamine (metabolism)
• Glutathione Transferase (metabolism)
• Insecticides (toxicity)
• Male
• Minocycline (pharmacology)
• Nitrites (metabolism)
• Oxidative Stress (drug effects)
• Parkinson Disease, Secondary (chemically induced, metabolism)
• Pyrethrins (toxicity)
• Rats, Wistar
• Superoxide Dismutase (metabolism)