Journal of Arak University of Medical Sciences

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The Protective Effect of Poly Antioxidant Silivit on Oxidative Stress and Blood Parameters in Workers Exposure to Organic Solvents

Ali Akbar Malekirad, Mohammad Abdollahi, Mohammad Fazilati, Najme Igani, Mahmod Reza Baghinia, Azam Taheri, Mohammad Amin Rezvanfar,
Volume 17, Issue 1 (4-2014)

Abstract

Introduction: Paints are composed of extensive variety of hazardous substances, such as organic solvents and heavy metals. Occupational exposure to paint increases oxidative stress, hematological disorders, and DNA injury. This study was performed to explore the beneficial effects of Selvit on the paint workers by measuring total antioxidant capacity, lipid peroxidation, and blood parameters as main oxidative stress biomarkers.

Materials and Methods: This clinical trial study was conducted on 25 male workers who worked in the paint factory. Serum markers such as total antioxidant capacity (TAC), lipid peroxidation (LPO) and also hematological parameters were measured before and after using Selvit (14 days). SPSS software was used for data analyses and paired t-test and Pearson correlation analysis were applied.

Results: Results showed that after using the Selvit, an increase in TAC and a decrease in LPO were observed but they were not significant. Also, aspartate transaninase significantly decreased after using Selvit and high density lipoprotein significantly increased.

Conclusion: Selvit have beneficial effect on hematological parameters due to its antioxidant capacity.

The Study of Inhibition of Lipase Activity in Pseudomonas aeroginosa

Majid Talebi, Dariush Minai-Tehrani, Mohammad Fazilati, Arash Minai-Tehrani,
Volume 20, Issue 9 (12-2017)

Abstract

Abstract
Background: Lipases are one of the groups of enzymes which are important in medicine and industry. In gastrointestinal tract of human, lipase catalysis break down of triglyceride. Bacteria have also lipases which break down triglyceride in their culture medium and can use its fatty acids as carbon source. Dicyclomine is an antispasmodic drug that relieves smooth muscle spasm of the gastrointestinal tract. Few drugs have been determined to inhibit lipase activity, in this research; dicyclomine was introduced as an inhibitor of lipase, for the first time.
Materials and Methods: Lipase was extracted from Pseudomonas aeruginosa and the effect of dicyclomine was tested on its activity. The bacterium was cultured in medium with olive oil as carbon source and the supernatant was used for enzyme assay. For monitoring the enzyme activity, Para nitrophenyl palmitate (pNPP) was used as a substrate and the induced product was measured by visible spectrophotometer. Lineweaver-Burk plot was utilized for revealing the type of binding.
Results: This research has shown that dicyclomine can inhibit lipase. Inhibition plot determined that the drug can inhibit the enzyme by competitive manner. Calculation of Ki and IC50 values showed that the drug can bind to the enzyme with high affinity. The study of enzyme activity in different pH and temperature revealed that optimum activity of enzyme, in the presence or absence of the drug, was observed in pH 8 and 60oC.
Conclusion: For the first time, dicyclomine was introduced as an inhibitor of lipase and the kinetics factors of the drug were investigated.

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