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    Eyes Problems

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    yoly
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    Eyes Problems

    Post by yoly on Tue May 01 2018, 10:53

    Rejuvenation of Visual Functions in Older Adult Drivers and Drivers with Cataract During a Short-Term Administration of N-Acetylcarnosine Lubricant Eye Drops

    https://www.liebertpub.com/doi/abs/10.1089/rej.2004.7.186

    Abstract

    The purpose of this study was to examine using the original halometer glare test of the type of visual impairment mediated by the increased glare sensitivity (halos) and associated with poorer visual function in both the better and worse eyes of older adult drivers and older drivers with cataract. The clinically validated (by Innovative Vision Products Inc.) formula of 1% N-acetylcarnosine (NAC) lubricant eye drops were applied topically to the eyes of older drivers to reduce glare disability and improve distance acuities for driving. This was a randomized, double-blind, placebo-controlled study. The examined subjects consisted of 65 older adults with cataract in one or both eyes, and 72 adult drivers who did not have cataract in either eye. In the control group, comparison with baseline values showed some variability of data in gradual worsening of glare sensitivity at red and green targets and minimal VA changes over 4 months. In the NAC-treated group, 4-month follow-up generally showed an improvement in VA and a significant improvement in glare sensitivity at red and green targets was documented in worse and better eyes using a critical cut point halometer score for driving. The NAC-treated eyes had statistically significant difference in VA, glare sensitivity compared with the control group (p < 0.001) at 4-month timepoint of treatment, as supported by the overall t-test results of the ratio of the follow-up data to the baseline values. Tolerability of NAC eyedrops was good in almost all patients, with no reports of ocular or systemic adverse effects. It would be advisable for traffic safety if a Halometer glare sensitivity test was implemented for vehicles and/or was regularly added to the requirements for a driver's licence. The results of this study provide a substantial basis for further evaluation of NAC in the treatment and prevention of vision impairment in the older population of drivers for legal driving. The developed ophthalmic drug NAC formula showed potential for the non-surgical treatment of age-related cataracts.

    N-Acetylcarnosine Lubricant Eyedrops Possess All-In-One Universal Antioxidant Protective Effects of L-Carnosine in Aqueous and Lipid Membrane Environments, Aldehyde Scavenging, and Transglycation Activities Inherent to Cataracts: A Clinical Study of the New Vision-Saving Drug N-Acetylcarnosine Eyedrop Therapy in a Database Population of Over 50,500 Patients

    https://journals.lww.com/americantherapeutics/Abstract/2009/11000/N_Acetylcarnosine_Lubricant_Eyedrops_Possess.11.aspx

    The antioxidant activity of L-carnosine (β-alanyl-L-histidine, bioactivated in ocular tissues) versus N-acetylcarnosine (N-acetyl-β-alanyl-L-histidine, ocular-targeted small dipeptide molecules) was studied in aqueous solution and in a lipid environment, employing liposomes as a model of lipid membranes. Reactive oxygen species (ROS) were generated by an iron/ascorbate promoter system for induction of lipid peroxidation (LPO). L-carnosine, which is stabilized from enzymatic hydrolysis, operates as a universal aldehyde and ROS scavenger in both aqueous and lipid environments and is effective at preventing ROS-induced damage to biomolecules. Second-generation carnosine analogs bearing the histidyl-hydrazide moiety were synthesized and tested versus L-carnosine for their ability to reverse the glycation process, also known as the Maillard reaction, and reverse the stable intermolecular cross-links, monitored in the glucose-ethylamine Schiff base model, ultimately resulting in the formation of the advanced glycation end products (AGEs) from nonenzymatic glycation, accumulating in numerous body tissues and fluids. The obtained data demonstrate the transglycation properties of the ophthalmically stabilized L-carnosine and L-carnosine histidyl-hydrazide derivatives tested and can be used to decrease or predict the occurrence of long-term complications of AGE formation and improve therapeutically the quality of vision and length of life for diabetes mellitus patients and survivors with early aging. Scientists at Innovative Vision Products, Inc. (IVP), developed lubricant eyedrops designed as a sustained-release 1% N-acetylcarnosine prodrug of L-carnosine. The eyedrops contain a mucoadhesive cellulose-based compound combined with corneal absorption promoters and glycerine in a drug-delivery system. Anti-aging therapeutics with the ophthalmic drug eyedrop formula including N-acetylcarnosine showed efficacy in the nonsurgical treatment of age-related cataracts for enrolled participants in the prospective, randomized, double-masked, placebo-controlled crossover clinical trial after controlling for age, gender, and daily activities. In a cohort in excess of 50,500 various patients seeking cutting-edge medical care, the N-acetylcarnosine topical eyedrops target therapy was demonstrated to have significant efficacy, safety, and good tolerability for the prevention and treatment of visual impairment in this older population with relatively stable patterns of causes for blindness and visual impairment. Overall, accumulated study data demonstrate that the IVP-designed new vision-saving drugs, including N-acetylcarnosine eyedrops, promote health vision and prevent vision disability from senile cataracts, primary open-angle glaucoma, age-related macular degeneration, diabetic retinopathy, and aging. N-acetylcarnosine eyedrop therapy is the crown jewel of the anti-aging medical movement and revolutionizes early detection, treatment, and rejuvenation of aging-related eye-disabling disorders. N-acetylcarnosine, as an innovative medical science tool and component of the home medicine and alternative medicine approaches, has the potential to alleviate visual impairment and its associated social, economic, and political woes for an aging population.

    Antioxidant activity of l-carnosine, a natural histidine-containing dipeptide in crystalline lens

    https://www.sciencedirect.com/science/article/pii/0005276089900854

    Abstract

    Lipid peroxidation was shown to be an initiatory cause of cataract development in some cases. It has been established that injection into the vitreous body of the rabbit eye of a suspension of liposomes prepared from phospholipids containing lipid peroxidation products induces the development of posterior subcapsular cataract. Such modelling of cataract is based on a type of clouding of the crystalline lens similar to that observed in cataract resulting from diffusion of toxic lipid peroxidation products from the retina to the lens through the vitreous body on degeneration of the photoreceptors. Saturated liposomes (prepared from dipalmitoylphosphatidylcholine) did not cause clouding of the lens, which demonstrated the peroxide mechanism of the genesis of this form of cataract. Clouding of the lens was accompanied by accumulation of fluorescing lipid peroxidation products in the vitreous body, aqueous humor and the lens and also by a fall in the concentration of reduced glutathione in the lens. The ability of l-carnosine (β-alanyl-l-histidine) to interact directly with lipid peroxidation products suggested its anticataract properties. The effect of l-carnosine on inhibiting or reversing the formation of cataract induced by the administration of lipid peroxidation products was discovered. This phenomenon appeared to be related with normalization of the peroxide metabolism parameters in the crystalline lens. In view of the data, an aqueous solution of l-carnosine is physiologically acceptable in effective nonsurgical treatment for cataracts.
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    graham64
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    Re: Eyes Problems

    Post by graham64 on Wed May 02 2018, 21:52

    Interesting especially for those of us with cataracts, thanks  Yoly


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