title: Bcl-xl and Bak protein expression in human optic nerve axons in eyeballs post-trauma and in the eyes with absolute glaucoma.
abstract: The aim of our study was an evaluation of Bcl-xl and Bak protein expressions in optic nerve axons in eyeballs after severe injury and absolute glaucoma. We examined a series of 41 eyeballs, which were enucleated, following extensive injury and a series of 19 eyeballs from patients with absolute glaucoma. The immunohistochemical reaction was performed, using antibodies against human Bcl-xl and Bak protein with LSAB and DAB. In the injured eyeballs in Group I, Bcl-xl protein expression was observed in 53.8%, Bak in 38.5%, in Group II, Bcl-xl in 40%, Bak 55%; in Group III, Bcl-xl in 62.5%, Bak in 62.5%. Nine (9), out of 19 (47.4%) cases showed Bcl-xl protein positivity, Bak 15, out of 19 (78.9%). The percentage of cases with Bak protein positivity was statistically higher than that for Bcl-xl (Bak/Bcl-xl p=0.0356). The results showed that there may be a dominance expression of proapoptotic proteins in optic nerve axons in glaucoma.
authors.affiliation: Department of Pathology Medical University of Bialystok, Poland. joasia@zpk.amb.edu.pl
authors.forename: J
authors.initials: J
authors.lastname: Reszeć
authors.forename: R
authors.initials: R
authors.lastname: Zalewska
authors.forename: Z
authors.initials: Z
authors.lastname: Mariak
authors.forename: S
authors.initials: S
authors.lastname: Sulkowski
mesh_terms: D017209:Apoptosis; D001369:Axons / Q000473:pathology*; D005131:Eye Injuries / Q000473:pathology*; D005901:Glaucoma / Q000473:pathology*; D006801:Humans; D008565:Membrane Proteins / Q000032:analysis*; D009900:Optic Nerve / Q000473:pathology*; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000032:analysis*; D050998:bcl-2 Homologous Antagonist-Killer Protein; D051020:bcl-X Protein
chemical_list: C494772:BAK1 protein, human; C494811:BCL2L1 protein, human; D008565:Membrane Proteins; D019253:Proto-Oncogene Proteins c-bcl-2; D050998:bcl-2 Homologous Antagonist-Killer Protein; D051020:bcl-X Protein