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      • KCI등재

        Five-year Outcomes of Ranibizumab in Neovascular Age-related Macular Degeneration: Real Life Clinical Experience

        Abdullah Ozkaya,Zeynep Alkin,Mesut Togac,Sibel Ahmet,Irfan Perente,Muhittin Taskapili 대한안과학회 2017 Korean Journal of Ophthalmology Vol.31 No.5

        Purpose: To evaluate the outcomes of 5-year ranibizumab treatment in neovascular age-related macular degeneration (nAMD) in a single center and real life clinical setting. Methods: The records of nAMD patients who were treated with ranibizumab between January 2010 and June 2011 were retrospectively reviewed. Patients who completed 5 years of follow-up were included. Main outcome measures were change in best-corrected visual acuity, central retinal thickness, and visit and injection numbers. Results: Forty-four eyes of 37 patients were included. Mean best-corrected visual acuity decreased from 0.82 ± 0.69 to 1.11 ± 0.65 logarithm of minimal angle of resolution after 5 years. Twenty-four eyes (54.5%) had visual acuity loss ≥3 lines, and 20 eyes (45.5%) had stable or improved vision (loss <3 lines, remained stable, or gained ≥1 line) at month 60. The mean total number of visits was 25.3 ± 5.8 (range, 14 to 42), and the mean total number of injections was 12.6 ± 6.4 (range, 3 to 26) at month 60. Conclusions: Half of the ranibizumab-treated nAMD patients maintained their vision during the 5 years of follow- up. Visit and injection numbers were found to be lower than in prospective studies, reflecting a real world clinical practice.

      • SCIESCOPUSKCI등재

        Effects of Intraperitoneally Administered Lipoic Acid, Vitamin E, and Linalool on the Level of Total Lipid and Fatty Acids in Guinea Pig Brain with Oxidative Stress Induced by H2O2

        ( Salt Celik ),( Ahmet Ozkaya ) 생화학분자생물학회 2002 BMB Reports Vol.35 No.6

        The aim of our study to investigate the protective effects of intraperitoneally-administrated vitamin E, dlalpha lipoic acid, and linalool on the level of total lipid and fatty acid in guinea pig brains with oxidative stress that was induced by H_2O_2. The total brain lipid content in the H_2O_2 group decreased when compared to the H_2O_2 + vitamin E (p<0.05), H_2O_2 + linalool (p<0.05), ALA (p<0.05), control (p<0.01), linalool (p<0.01), and vitamin E (p<0.01) groups. While the proportion of total saturated fatty acid (∑SFA) in the H_2O_2 group significantly increased (p<0.005) when compared to the vitamin E group, it only slightly increased (p<0.01) when compared to the control and H_2O_2 vitamin E groups. The ratio of the total unsaturated fatty acid (∑USFA) in the H_2O_2 groups was lower (p<0.05) than the control, vitamin E, and H_2O_2 + vitamin E groups. The level of the total polyunsaturated fatty acid (∑PUFA) in the H_2O_2 group decreased in when compared to the control, vitamin E, and H_2O_2 + vitamin E groups. While the proportion of the total w3 (omega 3), w6 (omega 6), and PUFA were found to be lowest in the H_2O_2 group, they were slightly increased (p<0.05) in the lipoic acid group when compared to the control and H_2O_2 + lipoic acid groups. However, the level of ∑SFA in the H_2O_2 group was highest; the level of ∑USFA in same group was lowest. As the proportion of ∑USFA and ∑PUFA were found to be highest in the linalool group, they were decreased in the H_2O_2 group when compared to the control group. Our results show that linalool has antioxidant properties, much the same as vitamin E and lipoic acid, to prevent lipid peroxidation. Additionally, vitamin E, lipoic acid, and linalool could lead to therapeutic approaches for limiting damage from oxidation reaction in unsaturated fatty acids, as ell as for complementing existing therapy for the treatment of complications of oxidative damage.

      • SCIESCOPUSKCI등재

        Identification and Characterization of a Putative Baculoviral Transcriptional Factor IE-1 from Choristoneura fumiferana Granulovirus

        ( Salt Celik ),( Ahmet Ozkaya ) 생화학분자생물학회 2002 BMB Reports Vol.35 No.6

        A gene that encodes a protein homologue to baculoviral IE-1 was identified and sequenced in the genome of the Choristoneura fumiferana granulovirus (ChfuGV). The gene has an 1278 nucleotide (nt) open-reading frame (ORF) that encodes 426 amino acids with an estimated molecular weight of 50.33 kDa. At the nucleotide level, several cis-acting regulatory elements were detected within the promoter region of the ie-1 gene of ChfuGV along with other studied granuloviruses (GVs). Two putative CCAAT elements were detected within the noncoding leader region of this gene; one was located on the opposite strand at -92 and the other at -420 nt from the putative start triplet. Two baculoviral late promoter motifs (TAAG) were also detected within the promoter region of the ie-1 gene of ChfuGV. A single polyadenylation signal, AATAAA, was located 18nt downstream of the putative translational stop codon of ie-1 from ChfuGV. At the protein level, the amino acid sequence data that was derived from the nucleotide sequence in ChfuGV IE-1 was compared to those of the Cydia pomonella granulovirus (CpGV), Xestia c-nigrum granulovirus (XcGV) and Plutella xylosteila granulovirus (PxGV). The C-terminal regions of the granuloviral IE-1 sequences appeared to be more conserved when compared to the N-terminal regions. A domain, similar to the basic helix-loop-helix like (bHLH-like) domain in NPVs, was detected at the C-terminal region of IE-1 from ChfuGV (residues 387 to 414). A phylogenetic tree for baculoviral IE-1 was constructed using a maximum parsimony analysis, A phylogenetic estimation demonstrates that ChfuGV IE-1 is most closely related to that of CpGV.

      • Effects of Intraperitoneally Administered Lipoic Acid, Vitamin E, and Linalool on the Level of Total Lipid and Fatty Acids in Guinea Pig Brain with Oxidative Stress Induced by H<sub>2</sub>O<sub>2</sub>

        Celik, Sait,Ozkaya, Ahmet 생화학분자생물학회 2002 Journal of biochemistry and molecular biology Vol.35 No.6

        The aim of our study was to investigate the protective effects of intraperitoneally-administrated vitamin E, dl-alpha lipoic acid, and linalool on the level of total lipid and fatty acid in guinea pig brains with oxidative stress that was induced by $H_2O_2$. The total brain lipid content in the $H_2O_2$ group decreased when compared to the $H_2O_2$ + vitamin E (p<0.05), $H_2O_2$ + linalool (p<0.05), ALA (p<0.05), control (p<0.01), linalool (p<0.01), and vitamin E (p<0.01) groups. While the proportion of total saturated fatty acid (${\Sigma}SFA$) in the $H_2O_2$ group significantly increased (p<0.005) when compared to the vitamin E group, it only slightly increased (p<0.01) when compared to the control and $H_2O_2$ + vitamin E groups. The ratio of the total unsaturated fatty acid (${\Sigma}USFA$) in the $H_2O_2$ groups was lower (p<0.05) than the control, vitamin E, and $H_2O_2$ + vitamin E groups. The level of the total polyunsaturated fatty acid (${\Sigma}PUEA$) in the $H_2O_2$ group decreased in when compared to the control, vitamin E, and $H_2O_2$ + vitamin E groups. While the proportion of the total w3 (omega 3), w6 (omega 6), and PUFA were found to be lowest in the $H_2O_2$ group, they were slightly increased (p<0.05) in the lipoic acid group when compared to the control and $H_2O_2$ + lipoic acid groups. However, the level of ${\Sigma}SFA$ in the $H_2O_2$ group was highest; the level of ${\Sigma}USFA$ in same group was lowest. As the proportion of ${\Sigma}USFA$ and ${\Sigma}PUFA$ were found to be highest in the linalool group, they were decreased in the $H_2O_2$ group when compared to the control group. Our results show that linalool has antioxidant properties, much the same as vitamin E and lipoic acid, to prevent lipid peroxidation. Additionally, vitamin E, lipoic acid, and linalool could lead to therapeutic approaches for limiting damage from oxidation reaction in unsaturated fatty acids, as well as for complementing existing therapy for the treatment of complications of oxidative damage.

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