Skip to main content
Log in

Divergent Expression Patterns of Drp1 and HSD10 in the Nigro-Striatum of Two Mice Strains Based on their MPTP Susceptibility

  • Original Article
  • Published:
Neurotoxicity Research Aims and scope Submit manuscript

Abstract

Alterations in the basal ganglia circuitry are critical events in the pathophysiology of Parkinson’s disease (PD). We earlier compared MPTP-susceptible C57BL/6J and MPTP-resistant CD-1 mice to understand the differential prevalence of PD in different ethnic populations like Caucasians and Asian-Indians. The MPTP-resistant CD-1 mice had 33% more nigral neurons and lost only 15–17% of them following MPTP administration. In addition to other cytomorphological features, their basal ganglia neurons had higher calcium-buffering protein levels. During disease pathogenesis as well as in MPTP-induced parkinsonian models, the loss of nigral neurons is associated with reduction in mitochondrial complex-1. Under these conditions, mitochondria respond by undergoing fusion or fission. 17β-hydroxysteroid type 10, i.e., hydroxysteroid dehydrogenase10 (HSD10) and dynamin-related peptide1 (Drp1) are proteins involved in mitochondrial hyperfusion and fission, respectively. Each plays an important role in mitochondrial structure and homeostasis. Their role in determining susceptibility to the neurotoxin MPTP in basal ganglia is however unclear. We studied their expression using immunohistochemistry and Western blotting in the dorsolateral striatum, ventral tegmental area, and substantia nigra pars compacta (SNpc) of C57BL/6J and CD-1 mice. In the SNpc, which exhibits more neuron loss following MPTP, C57BL/6J had higher baseline Drp1 levels; suggesting persistence of fission under normal conditions. Whereas, HSD10 levels increased in CD-1 following MPTP administration. This suggests mitochondrial hyperfusion, as an attempt towards neuroprotection. Thus, the baseline differences in HSD10 and DRP1 levels as well as their contrasting MPTP-responses may be critical determinants of the magnitude of neuronal loss/survival. Similar differences may determine the variable susceptibility to PD in humans.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5

Similar content being viewed by others

References

Download references

Acknowledgements

The authors are grateful to Dr. G.H. Mohan, Head Veterinarian at the National Centre for Biological Sciences, Bengaluru, for providing breeding colonies of the CD-1 mice strain. We thank Dr. Vidyadhara D.J. and Dr. Yarreiphang H. for their help in initiating the experiments.

Funding

This work was supported by the Science and Engineering Research Board, Department of Science and Technology, Government of India, to PAA (No. SR/SO/HS-0121/2012). SA is a NIMHANS M.Phil. fellow.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Phalguni Anand Alladi.

Ethics declarations

Conflict of Interest

The authors declare that they have no competing interest.

Additional information

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Seshadri, A., Alladi, P.A. Divergent Expression Patterns of Drp1 and HSD10 in the Nigro-Striatum of Two Mice Strains Based on their MPTP Susceptibility. Neurotox Res 36, 27–38 (2019). https://doi.org/10.1007/s12640-019-00036-8

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s12640-019-00036-8

Keywords

Navigation