Abstract:
:Mutations in the optic atrophy type 1 (OPA1) gene give rise to human autosomal dominant optic atrophy. The purpose of this study is to investigate OPA1 protein expression in the human retina and optic nerve. A rabbit polyclonal antiserum was generated using a fusion protein covering amino acids 647 to 808 of the human OPA1 protein as the immunogenic antigen. Western blot and immunofluorescence staining were performed to examine OPA1 expression in the human retina and optic nerve. In human retina, we found that OPA1 expression was clearly present in retinal ganglion cells and photoreceptors. OPA1 immunoreactivity was also present in the nerve fiber layer, inner plexiform layer and outer plexiform layer. However, OPA1 protein was not detected in the choline acetyltransferase-positive, calretinin-positive, and calbindin-positive amacrine cells, nor in the calbindin-positive horizontal cells. In the human optic nerve, expression of OPA1 was present in the axonal tract that was labeled with neurofilament specific antibody. In conclusion, expression of OPA1 gene is present in the mitochondria-rich regions of the retina and optic nerve. This suggests that OPA1 protein might be involved in the functioning of the mitochondria that are present in both inner and outer retinal neurons.
journal_name
Exp Eye Resjournal_title
Experimental eye researchauthors
Wang AG,Fann MJ,Yu HY,Yen MYdoi
10.1016/j.exer.2006.06.004subject
Has Abstractpub_date
2006-11-01 00:00:00pages
1171-8issue
5eissn
0014-4835issn
1096-0007pii
S0014-4835(06)00293-4journal_volume
83pub_type
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