Assay for heavy metals using an inhibitive assay based on the acetylcholinesterase from Clarias batrachus

  • Umar Abubakar Muhammad Department of Biological Sciences, Faculty of Science, Gombe State University, P.M.B. 027, Gombe, Nigeria.
  • Lik Gin Tham Dept of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
  • Natarajan Perumal Dept of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
  • Hassan Mohd Daud Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
  • Nur Adeela Yasid Dept of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
  • Mohd Yunus Shukor Dept of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.

Abstract

Acetylcholinesterase (AChE) is usually used as an inhibitive assay for insecticides. A lesser-known property of AChE is its inhibition by heavy metals. In this work, we evaluate an AChE from brains of Clarias batrachus (catfish) exposed to wastes from aquaculture industry as an inhibitive assay for heavy metals. We discovered that the AChE was inhibited completely by Hg2+, Ag2+, Pb2+, Cu2+, Cd2+, Cr6+ and Zn2+ during initial screening. When tested at various concentrations, the heavy metals exhibited exponential decay type inhibition curves. The calculated IC50 (mg/L) for the heavy metals Ag2+, Cu2+, Hg2+, Cr6+ and Cd2+ were 0.088, 0.078, 0.071, 0.87 and 0.913, respectively. The IC50 for these heavy metals are comparable, and some are lower than the IC50 values from the cholinesterases from previously studied fish. The assay can be carried out in less than 30 minutes at ambient temperature.
Published
2016-12-31
How to Cite
MUHAMMAD, Umar Abubakar et al. Assay for heavy metals using an inhibitive assay based on the acetylcholinesterase from Clarias batrachus. Bioremediation Science and Technology Research, [S.l.], v. 4, n. 2, p. 6-10, dec. 2016. ISSN 2289-5892. Available at: <http://journal.hibiscuspublisher.com/index.php/BSTR/article/view/369>. Date accessed: 19 feb. 2018.
Section
Articles