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Journal of Molecular Histology

, Volume 43, Issue 1, pp 17–25 | Cite as

Expression of p97/VCP and ubiquitin during postnatal development of the degenerating rat retina

  • Huseyin Ortak
  • Sevil Cayli
  • Ufuk Tas
  • Seda Ocakli
  • Erkan Söğüt
  • Helin Deniz Demir
Original Paper

Abstract

In this study, we aimed to investigate the distribution pattern of ubiquitin and p97/VCP in the rat retina during postnatal development. Eyeballs from 1-, 4-, 10-, 36- and 72-week-old rats were examined by immunohistochemistry, and protein colocalization was determined by immunofluorescence microscopy. In the 1-week-old rat retina, p97/VCP was strongly expressed in the neuroblast layer, however no ubiquitin immunoreactivity was observed. p97/VCP immunoreactivity was present in the ganglion cell layer (GCL), inner nuclear layer (INL), outer nuclear layer (ONL), inner segment (IS) of the photoreceptor layer, and retinal pigment epithelium in the 4- and 10-week-old rat retinas. p97/VCP immunoreactivity increased significantly in the 10-week-old rat retinas. Ubiquitin was barely seen in the 4-week-old rat retinas, and ubiquitin expression was weak in the GCL and the IPL of the 10-week-old rat retinas. In the 36- and 72-week-old rats, the presence of ubiquitin was remarkable in the IS, INL, IPL and GCL, however, p97/VCP immunoreactivity was significantly decreased. Colocalization of ubiquitin and p97/VCP was also observed in the INL, IS, GCL and ONL of 36- and 72-week-old rat retinas. Our results indicate that p97/VCP immunoreactivity in the retina significantly decreases after rats reach 10 weeks of age, whereas ubiquitin immunoreactivity increases with aging. These results suggest that an altered expression pattern of p97/VCP and ubiquitin in the developing rat retina may associate with age-related retinal degeneration.

Keywords

Ubiquitin p97/VCP Rat Retinal degeneration 

Notes

Acknowledgments

This project was supported by the Research Foundation of Gaziosmanpasa University (Project no:2011-059).

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Huseyin Ortak
    • 1
  • Sevil Cayli
    • 2
  • Ufuk Tas
    • 3
  • Seda Ocakli
    • 2
  • Erkan Söğüt
    • 4
  • Helin Deniz Demir
    • 1
  1. 1.Department of Ophthalmology, Faculty of MedicineGaziosmanpasa UniversityTokatTurkey
  2. 2.Department of Histology and Embryology, Faculty of MedicineGaziosmanpasa UniversityTokatTurkey
  3. 3.Department of Anatomy, Faculty of MedicineGaziosmanpasa UniversityTokatTurkey
  4. 4.Department of Biochemistry, Faculty of MedicineGaziosmanpasa UniversityTokatTurkey

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