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1 General aspects (0)   1.1 Epidemiology (8)   1.2 Population genetics (0)   1.3 Pathogenesis (4)   1.4 Quality of life (13)   1.5 Glaucomas as cause of blindness (5)   1.6 Prevention and screening (11) 2 Anatomical structures in glaucoma (0)   2.1 Conjunctiva (12)   2.2 Cornea (28)   2.3 Sclera (9)   2.4 Anterior chamber angle (8)   2.5 Meshwork (0)     2.5.1 Trabecular meshwork (9)     2.5.2 Schlemms canal (1)     2.5.3 Scleral outlet channels (0)   2.6 Aqueous humor dynamics (0)     2.6.1 Production (1)     2.6.2 Outflow (2)       2.6.2.1 Trabecular meshwork (4)       2.6.2.2 Uveoscleral (1)     2.6.3 Compostion (2)   2.7 Episcleral veins and venous pressure (0)   2.8 Iris (2)   2.9 Ciliary body (1)   2.10 Lens (1)   2.11 Vitreous body (1)   2.12 Choroid, peripapillary choroid, peripapillary atrophy (11)   2.13 Retina and retinal nerve fibre layer (30)   2.14 Optic disc (28)   2.15 Optic nerve (3)   2.16 Chiasma and retrochiasmal central nervous system (11)   2.17 Stem cells (1)   2.20 Other (0) 3 Laboratory methods (0)   3.1 Microscopy (4)   3.2 Electron microscopy (0)   3.3 Immunohistochemistry (1)   3.4 Molecular genetics (0)     3.4.1 Linkage studies (1)     3.4.2 Gene studies (27)   3.5 Molecular biology incl. 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Filtering surgery (0)     12.8.1 Without tube implant (10)     12.8.2 With tube implant or other drainage devices (42)     12.8.3 Non-perforating (4)     12.8.4 Using laser (0)     12.8.5 Other (0)     12.8.10 Woundhealing antifibrosis (15)     12.8.11 Complications, endophthalmitis (14)   12.9 Trabeculotomy, goniotomy (5)   12.10 Cyclodestruction (5)   12.11 Cyclodialysis (0)   12.12 Cataract extraction (0)     12.12.1 Intracapsular (0)     12.12.2 Extracapsular (0)     12.12.3 Phacoemulsification (12)   12.14 Combined cataract extraction and glaucoma surgery (0)     12.14.1 Intracapsular (0)     12.14.2 Extracapsular (0)     12.14.3 Phacoemulsification (10)   12.15 Capsulotomy (0)   12.16 Vitrectomy (0)   12.17 Anesthesia (2)   12.20 Other (2) 13 Therapeutic prognosis and outcome (0)   13.1 Prognostic factors (1)   13.2 Outcome (2)     13.2.1 IOP (0)     13.2.2 Visual field (0)       13.2.2.1 Progression (0)       13.2.2.2 Improvement (0)     13.2.3 Other (0) 14 Costing studies; pharmacoeconomics (6) 15 Miscellaneous (20)

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Abstract #61578 Published in IGR 17-1

Plasma Homocysteine, Serum Folic Acid, Serum Vitamin B12, Serum Vitamin B6, MTHFR, and Risk of Normal-Tension Glaucoma

Li J; Xu F; Zeng R; Gong H; Lan Y
Journal of Glaucoma 2016; 25: e94-e98

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BACKGROUND: This meta-analysis aims to comprehensively evaluate the association between total homocysteine (tHcy) levels, serum folic acid, vitamin B12, vitamin B6 levels, methylenetetrahydrofolate reductase (MTHFR) C677T genotype, and risk of normal-tension glaucoma (NTG). MATERIALS AND METHODS: A systematic search of the EMBASE and PubMed databases was performed to evaluate plasma tHcy levels, serum folic acid, B vitamins' mean difference, and odds ratios of MTHFR C677T genotype between cases and controls. RESULTS: A total of 7 studies including 458 cases and 555 controls meeting the inclusion criteria were involved in this meta-analysis. There were 4 studies for tHcy (149 cases and 148 controls), 2 studies for vitamin B6, vitamin B12, and folate (90 cases and 82 controls), and 4 studies for MTHFR (343 cases and 449 controls). Overall, the mean plasma tHcy levels, serum folic acids, vitamin B12, and vitamin B6 levels were 1.16 μmol/L [95% confidence interval (CI), -0.13, 2.45], -0.62 μmol/L (95% CI, -1.98, 0.74), 5.81 μmol/L (95% CI, -3.53, 15.14), and -16.79 μmol/L (95% CI, -86.09, 52.51). MTHFR TT genotype was found to be unrelated to NTG risk (odds ratio=1.08; 95% CI, 0.69, 1.69). CONCLUSION: NTG is not associated with elevated plasma tHcy, serum folic acid, serum vitamin B12, serum vitamin B6, and MTHFR C677T genotype.

*Department of Ophthalmology, Sun Yat-Sen Memorial Hospital †Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, Guangdong, P.R. China.

Full article

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Classification:

9.2.4 Normal pressure glaucoma (Part of: 9 Clinical forms of glaucomas > 9.2 Primary open angle glaucomas)
3.7 Biochemistry (Part of: 3 Laboratory methods)
9.4.15 Glaucoma in relation to systemic disease (Part of: 9 Clinical forms of glaucomas > 9.4 Glaucomas associated with other ocular and systemic disorders)

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