Molecular and Cellular Biochemistry

, Volume 379, Issue 1–2, pp 19–27 | Cite as

Semiquinone derivative isolated from Bacillus sp. INM-1 protects cellular antioxidant enzymes from γ-radiation-induced renal toxicity

  • S. Mishra
  • D. S. K. Reddy
  • V. S. Jamwal
  • D. D. Bansal
  • D. D. Patel
  • P. Malhotra
  • A. K. Gupta
  • P. K. Singh
  • S. Jawed
  • Raj Kumar


This study was focused to evaluate protection of indigenous antioxidant system of mice against gamma radiation-induced oxidative stress using a semiquinone (SQGD)-rich fraction isolated from Bacillus sp. INM-1. Male C57bl/6 mice were administered SQGD (50 mg/kgb.w.i.p.) 2 h before irradiation (10 Gy) and modulation in antioxidant enzymes activities was estimated at different time intervals and compared with irradiated mice which were not pretreated by SQGD. Compared to untreated controls, SQGD pretreatment significantly (p < 0.05) accelerates superoxide dismutase, catalase, GSH, and glutathione-S-transferase activities. Similarly, significant (p < 0.05) increase in the expression of superoxide dismutase, catalase, GSH, and glutathione-S-transferase was observed in irradiated mice pretreated by SQGD, compared to only irradiated groups. Total antioxidant status equivalent to trolox was estimated in renal tissue of the mice after SQGD administration. Significant ABTS+ radical formation was observed in H2O2-treated kidney homogenate, due to oxidative stress in the tissue. However, significant decrease in the levels of ABTS+ radical was observed in kidney homogenate of the mice pretreated with SQGD. Therefore, it can be concluded that SQGD neutralizes oxidative stress by induction of antioxidant enzymes activities and thus improved total antioxidant status in cellular system and hence contributes to radioprotection.


Antioxidant Superoxide dismutase Catalase Glutathione-S-transferase GSH Radiation 



Authors would like to acknowledge Defence Research and Development Organisation for financial assistance for the project (1.3 of ST-P1, INM-311) as well as for awarding Senior Research Fellowship. Authors would also like to acknowledge Mrs. Ritu Tyagi (Senior Research Fellow, DRDO) and Mr. A. R. Khan (Senior Research Fellow, DRDO) from NMR Research Centre, INMAS, for their assistance in designing and conducting the experiments.

Conflict of interest

The authors declared no conflict of interest.


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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • S. Mishra
    • 1
  • D. S. K. Reddy
    • 2
  • V. S. Jamwal
    • 2
  • D. D. Bansal
    • 1
  • D. D. Patel
    • 1
  • P. Malhotra
    • 1
  • A. K. Gupta
    • 1
  • P. K. Singh
    • 1
  • S. Jawed
    • 3
  • Raj Kumar
    • 1
  1. 1.Radiation Biosciences Division, Radiation Biotechnology GroupInstitute of Nuclear Medicine and Allied SciencesDelhiIndia
  2. 2.Department of BiotechnologyG.B.Pant Engineering CollegePauri-GarhwalIndia
  3. 3.Department of Biochemistry, Faculty of Science Jamia HamdardDelhiIndia

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