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1 General aspects (0)   1.1 Epidemiology (14)   1.2 Population genetics (0)   1.3 Pathogenesis (1)   1.4 Quality of life (17)   1.5 Glaucomas as cause of blindness (10)   1.6 Prevention and screening (15) 2 Anatomical structures in glaucoma (0)   2.1 Conjunctiva (7)   2.2 Cornea (37)   2.3 Sclera (5)   2.4 Anterior chamber angle (9)   2.5 Meshwork (0)     2.5.1 Trabecular meshwork (15)     2.5.2 Schlemms canal (3)     2.5.3 Scleral outlet channels (0)   2.6 Aqueous humor dynamics (0)     2.6.1 Production (1)     2.6.2 Outflow (0)       2.6.2.1 Trabecular meshwork (1)       2.6.2.2 Uveoscleral (0)     2.6.3 Compostion (6)   2.7 Episcleral veins and venous pressure (0)   2.8 Iris (3)   2.9 Ciliary body (7)   2.10 Lens (1)   2.11 Vitreous body (1)   2.12 Choroid, peripapillary choroid, peripapillary atrophy (9)   2.13 Retina and retinal nerve fibre layer (38)   2.14 Optic disc (28)   2.15 Optic nerve (3)   2.16 Chiasma and retrochiasmal central nervous system (14)   2.17 Stem cells (6)   2.20 Other (0) 3 Laboratory methods (0)   3.1 Microscopy (0)   3.2 Electron microscopy (1)   3.3 Immunohistochemistry (1)   3.4 Molecular genetics (0)     3.4.1 Linkage studies (0)     3.4.2 Gene studies (16)   3.5 Molecular biology incl. SiRNA (23)   3.6 Cellular biology (45)   3.7 Biochemistry (13)   3.8 Pharmacology (15)   3.9 Pathophysiology (35)   3.10 Immunobiology (7)   3.11 Pharmacogenetics (0)   3.12 Proteomics (3)   3.13 In vivo imaging (0)     3.13.1 Laser Scanning (0)       3.13.1.1 Confocal Scanning Laser Ophthalmoscopy (0)       3.13.1.2 Confocal Scanning Laser Polarimetry (0)     3.13.2 Optical Coherence Tomography (0)       3.13.2.1 Anterior Segment (0)       3.13.2.2 Posterior Segment (0)     3.13.3 RGC Imaging (0)     3.13.4 Other (0)   3.20 Other (0) 4 Tissue culture of ocular cells (0) 5 Experimental glaucoma; animal models (0)   5.1 Rodent (22)   5.2 Primates (1)   5.3 Other (5) 6 Clinical examination methods (0)   6.1 Intraocular pressure measurement; factors affecting IOP (0)     6.1.1 Devices, techniques (16)     6.1.2 Fluctuation, circadian rhythms (2)     6.1.3 Factors affecting IOP (15)   6.2 Tonography, aqueous flow measurement (see also 2.6) (0)   6.3 Biomicroscopy (slitlamp) (0)     6.3.1 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disorders (1)     9.4.1 Steroid-induced glaucoma (6)     9.4.2 Glaucomas associated with disorders of the cornea, conjunctiva, sclera (0)       9.4.2.1 Iridocorneal endothelial syndrome (ICE, incl. irisatrophy) (2)       9.4.2.2 Posterior polymorphous dystrophy (0)       9.4.2.3 Fuchs' endothelial dystrophy (0)       9.4.2.5 Other (1)     9.4.3 Glaucomas associated with disorders of the iris and ciliary body (0)       9.4.3.1 Pigmentary glaucoma (3)       9.4.3.5 Other (0)     9.4.4 Glaucomas associated with disorders of the lens (0)       9.4.4.1 Exfoliation syndrome (6)       9.4.4.2 Glaucomas associated with cataracts (3)       9.4.4.3 Glaucomas associated with lens dislocation (0)       9.4.4.5 Other (2)     9.4.5 Glaucomas associated with disorders of the retina, choroid and vitreous (0)       9.4.5.1 Neovascular glaucoma (8)       9.4.5.5 Other (9)     9.4.6 Glaucomas associated with inflammation, uveitis (17)     9.4.7 Glaucomas associated with ocular trauma (3)     9.4.8 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surgery (3)     12.8.1 Without tube implant (20)     12.8.2 With tube implant or other drainage devices (50)     12.8.3 Non-perforating (16)     12.8.4 Using laser (0)     12.8.5 Other (5)     12.8.10 Woundhealing antifibrosis (8)     12.8.11 Complications, endophthalmitis (16)   12.9 Trabeculotomy, goniotomy (16)   12.10 Cyclodestruction (16)   12.11 Cyclodialysis (2)   12.12 Cataract extraction (0)     12.12.1 Intracapsular (0)     12.12.2 Extracapsular (0)     12.12.3 Phacoemulsification (8)   12.14 Combined cataract extraction and glaucoma surgery (0)     12.14.1 Intracapsular (0)     12.14.2 Extracapsular (0)     12.14.3 Phacoemulsification (13)   12.15 Capsulotomy (0)   12.16 Vitrectomy (1)   12.17 Anesthesia (1)   12.20 Other (1) 13 Therapeutic prognosis and outcome (0)   13.1 Prognostic factors (5)   13.2 Outcome (0)     13.2.1 IOP (1)     13.2.2 Visual field (2)       13.2.2.1 Progression (0)       13.2.2.2 Improvement (0)     13.2.3 Other (1) 14 Costing studies; pharmacoeconomics (15) 15 Miscellaneous (27)

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Abstract #85151 Published in IGR 21-1

Mitochondrial Dysfunctions May Be One of the Major Causative Factors Underlying Detrimental Effects of Benzalkonium Chloride

Rogov AG; Goleva TN; Sukhanova EI; Epremyan KK; Trendeleva TA; Ovchenkova AP; Aliverdieva DA; Zvyagilskaya RA
Oxidative medicine and cellular longevity 2020; 2020: 8956504

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Benzalkonium chloride (BAC) is currently the most commonly used antimicrobial preservative in ophthalmic solutions, nasal sprays, and cosmetics. However, a large number of clinical and experimental investigations showed that the topical administration of BAC-containing eye drops could cause a variety of ocular surface changes, from ocular discomfort to potential risk for future glaucoma surgery. BAC-containing albuterol may increase the risk of albuterol-related systemic adverse effects. BAC, commonly present in personal care products, in cosmetic products can induce irritation and dose-dependent changes in the cell morphology. The cationic nature of BAC (it is a quaternary ammonium) suggests that one of the major targets of BAC in the cell may be mitochondria, the only intracellular compartment charged negatively. However, the influence of BAC on mitochondria has not been clearly understood. Here, the effects of BAC on energy parameters of rat liver mitochondria as well as on yeast cells were examined. BAC, being a "weaker" uncoupler, potently inhibited respiration in state 3, diminished the mitochondrial membrane potential, caused opening of the Ca2+/Pi-dependent pore, blocked ATP synthesis, and promoted HO production by mitochondria. BAC triggered oxidative stress and mitochondrial fragmentation in yeast cells. BAC-induced oxidative stress in mitochondria and yeast cells was almost totally prevented by the mitochondria-targeted antioxidant SkQ1; the protective effect of SkQ1 on mitochondrial fragmentation was only partial. Collectively, these data showed that BAC acts adversely on cell bioenergetics (especially on ATP synthesis) and mitochondrial dynamics and that its prooxidant effect can be partially prevented by the mitochondria-targeted antioxidant SkQ1.

Federal Research Center "Fundamentals of Biotechnology", Russian Academy of Sciences, Leninsky pr. 33, 119071 Moscow, Russia.

Full article

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Classification:

11.16 Vehicles, delivery systems, pharmacokinetics, formulation (Part of: 11 Medical treatment)
2.1 Conjunctiva (Part of: 2 Anatomical structures in glaucoma)
2.2 Cornea (Part of: 2 Anatomical structures in glaucoma)
3.6 Cellular biology (Part of: 3 Laboratory methods)

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