Expression of heat shock transcription factors and heat shock protein 72 in rat retina after intravitreal injection of low dose N-methyl-d-aspartate.

Expression of heat shock transcription factors and heat shock protein 72 in rat retina after intravitreal injection of low dose N-methyl-d-aspartate. Research Abstract Details 

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Expression of heat shock transcription factors and heat shock protein 72 in rat retina after intravitreal injection of low dose N-methyl-d-aspartate. Abstract Text:

Jaehong Ahn,Natik Piri,Joseph Caprioli,Yasunari Munemasa,Seok Hwan Kim,Jacky M K Kwong,Jaehong Ahn,Natik Piri,Joseph Caprioli,Yasunari Munemasa,Seok Hwan Kim,Jacky M K Kwong,

The heat shock response is a genetically well-ordered process for cell to generate heat shock protein (HSP). Various stressors can trigger the response through heat shock transcriptional factor (HSF) regulation. Recent studies demonstrated that preconditioning of N-methyl-d-aspartate (NMDA) at non-lethal levels has neuroprotective effects, but the exact mechanisms are unclear. We hypothesize that the protective mechanisms of NMDA preconditioning could involve HSP expression. To understand the regulatory mechanisms of HSP under stress, we examined the expression of Hsp72, HSF1 and HSF2 in the adult rat retina after intravitreal injection of NMDA. Retinal ganglion cell (RGC) counting with retrograde labeling showed that 8nmol, but not 0.8nmol, of intravitreal NMDA reduced RGC survival. Western blotting and immunohistochemistry showed that non-lethal (0.8nmol) doses of NMDA induced a time-dependent expression of HSF1 and HSF2, and that the expression of HSF1 and HSF2 in the RGC layer peaked between 9 and 18h after injection. Parallel to the increased HSF expression, immunohistochemistry and in situ hybridization demonstrated that Hsp72 mRNA and protein expression increased 9 and 12h after non-lethal NMDA injection, respectively. Our findings suggest that the expression of HSF1 and HSF2 is associated with the Hsp72-related stress response.

Expression of heat shock transcription factors and heat shock protein 72 in rat retina after intravitreal injection of low dose N-methyl-d-aspartate. Publishing Authors By Initials

J Ahn,N Piri,J Caprioli,Y Munemasa,SH Kim,JM Kwong,J Ahn,N Piri,J Caprioli,Y Munemasa,SH Kim,JM Kwong,

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Expression of heat shock transcription factors and heat shock protein 72 in rat retina after intravitreal injection of low dose N-methyl-d-aspartate. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Neuroscience letters

VOLUME: 433

Page Numbers: 11-6

Journal Abbreviation: Neurosci. Lett.

ISSN: 0304-3940

DAY: 25

MONTH: 12

YEAR: 2007

Expression of heat shock transcription factors and heat shock protein 72 in rat retina after intravitreal injection of low dose N-methyl-d-aspartate. Information

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LANGUAGE: eng

NlmUniqueID: 7600130

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Grant and Affiliation Information for Expression of heat shock transcription factors and heat shock protein 72 in rat retina after intravitreal injection of low dose N-methyl-d-aspartate.

AFFILIATION: Department of Ophthalmology, University of California Los Angeles, Los Angeles, CA, USA; Department of Ophthalmology, Ajou University School of Medicine, Suwon, Republic of Korea.

Country: Ireland

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MEDLINETA: Neurosci Lett

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