scholarly journals Features of Retinal Neurogenesis as a Key Factor of Age-Related Neurodegeneration: Myth or Reality?

2021 ◽  
Vol 22 (14) ◽  
pp. 7373
Author(s):  
Darya V. Telegina ◽  
Oyuna S. Kozhevnikova ◽  
Anna K. Antonenko ◽  
Nataliya G. Kolosova
Keyword(s):  
De Novo ◽  
The Elderly ◽  
Developed Countries ◽  
Pathological Process ◽  
Age Related Macular Degeneration ◽  
Long Term Effects ◽  
Functional Changes ◽  
Age Related ◽  
Functional Features ◽  
Retinal Neurogenesis

Age-related macular degeneration (AMD) is a complex multifactorial neurodegenerative disease that constitutes the most common cause of irreversible blindness in the elderly in the developed countries. Incomplete knowledge about its pathogenesis prevents the search for effective methods of prevention and treatment of AMD, primarily of its “dry” type which is by far the most common (90% of all AMD cases). In the recent years, AMD has become “younger”: late stages of the disease are now detected in relatively young people. It is known that AMD pathogenesis—according to the age-related structural and functional changes in the retina—is linked with inflammation, hypoxia, oxidative stress, mitochondrial dysfunction, and an impairment of neurotrophic support, but the mechanisms that trigger the conversion of normal age-related changes to the pathological process as well as the reason for early AMD development remain unclear. In the adult mammalian retina, de novo neurogenesis is very limited. Therefore, the structural and functional features that arise during its maturation and formation can exert long-term effects on further ontogenesis of this tissue. The aim of this review was to discuss possible contributions of the changes/disturbances in retinal neurogenesis to the early development of AMD.

scholarly journals Features of Retinal Neurogenesis as a Key Factor of Age-Related Neurodegeneration: Myth or Reality?

2021 ◽  
Author(s):  
Darya Telegina ◽  
Oyuna Kozhevnikova ◽  
Anna Antonenko ◽  
Nataliya Kolosova
Keyword(s):  
De Novo ◽  
The Elderly ◽  
Developed Countries ◽  
Pathological Process ◽  
Age Related Macular Degeneration ◽  
Long Term Effects ◽  
Functional Changes ◽  
Age Related ◽  
Functional Features ◽  
Retinal Neurogenesis

Age-related macular degeneration (AMD) is a complex, multifactorial neurodegenerative disease that constitutes the most common cause of irreversible blindness in the elderly in developed countries. Incomplete knowledge about its pathogenesis prevents the search for effective methods of prevention and treatment of AMD, primarily its “dry” type, which is by far the most common (90% of all AMD cases). In recent years, AMD became younger: late stages of the disease are now detected in relatively young people. It is known that AMD pathogenesis—according to the age-related structural and functional changes in the retina—is linked with inflammation, hypoxia, oxidative stress, mitochondrial dysfunction, and an impairment of neurotrophic support, but the mechanisms that trigger the conversion of normal age-related changes to the pathological process as well as the reason for early AMD development remain unclear. In the adult mammalian retina, de novo neurogenesis is very limited. Therefore, the structural and functional features that arise during its maturation and formation can exert long-term effects on further ontogenesis of this tissue. The aim of this review is to discuss possible contributions of the changes/disturbances in retinal neurogenesis to the early development of AMD.

scholarly journals Impact of neovascular age-related macular degeneration: burden of patients receiving therapies in Japan

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shigeru Honda ◽  
Yasuo Yanagi ◽  
Hideki Koizumi ◽  
Yirong Chen ◽  
Satoru Tanaka ◽  
...  
Keyword(s):  
Macular Degeneration ◽  
Productivity Loss ◽  
Work Productivity ◽  
The Elderly ◽  
Developed Countries ◽  
Age Related Macular Degeneration ◽  
Resource Utilisation ◽  
Total Work ◽  
Healthcare Resource Utilisation ◽  
Age Related

AbstractThe chronic eye disorder, neovascular age-related macular degeneration (nAMD), is a common cause of permanent vision impairment and blindness among the elderly in developed countries, including Japan. This study aimed to investigate the disease burden of nAMD patients under treatment, using data from the Japan National Health and Wellness surveys 2009–2014. Out of 147,272 respondents, 100 nAMD patients reported currently receiving treatment. Controls without nAMD were selected by 1:4 propensity score matching. Healthcare Resource Utilisation (HRU), Health-Related Quality of Life (HRQoL), and work productivity loss were compared between the groups. Regarding HRU, nAMD patients had significantly increased number of visits to any healthcare provider (HCP) (13.8 vs. 8.2), ophthalmologist (5.6 vs. 0.8), and other HCP (9.5 vs. 7.1) compared to controls after adjusting for confounding factors. Additionally, nAMD patients had reduced HRQoL and work productivity, i.e., reduced physical component summary (PCS) score (46.3 vs. 47.9), increased absenteeism (18.14% vs. 0.24%), presenteeism (23.89% vs. 12.44%), and total work productivity impairment (33.57% vs. 16.24%). The increased number of ophthalmologist visits were associated with decreased PCS score, increased presenteeism and total work productivity impairment. The current study highlighted substantial burden for nAMD patients, requiring further attention for future healthcare planning and treatment development.

scholarly journals Introduction to the multi-author review on macular degeneration

2020 ◽  
Vol 77 (5) ◽  
pp. 779-780 ◽  
Author(s):  
Anu Kauppinen
Keyword(s):  
Macular Degeneration ◽  
Vision Loss ◽  
The Elderly ◽  
Developed Countries ◽  
Age Related Macular Degeneration ◽  
Age Related ◽  
Severe Vision Loss ◽  
Author Review ◽  
Dry Amd ◽  
Endothelial Growth Factor

AbstractProlonged life expectancies contribute to the increasing prevalence of age-related macular degeneration (AMD) that is already the leading cause of severe vision loss among the elderly in developed countries. In dry AMD, the disease culminates into vast retinal atrophy, whereas the wet form is characterized by retinal edema and sudden vision loss due to neovascularization originating from the choroid beneath the Bruch’s membrane. There is no treatment for dry AMD and despite intravitreal injections of anti-vascular endothelial growth factor (VEGF) that suppress the neovessel formation, also wet AMD needs new therapies to prevent the disease progression and to serve patients lacking of positive response to current medicines. Knowledge on disease mechanisms is a prerequisite for the drug development, which is hindered by the multifactorial nature of AMD. Numerous distinguished publications have revealed AMD mechanisms at the cellular and molecular level and in this multi-author review, we take a bit broader look at the topic with some novel aspects.

TIMP3 mutation in Sorsby's fundus dystrophy: molecular insights

2005 ◽  
Vol 7 (24) ◽  
pp. 1-15 ◽  
Author(s):  
Zheng Li ◽  
Michael P. Clarke ◽  
Michael D. Barker ◽  
Norman McKie
Keyword(s):  
Peripheral Vision ◽  
Genetic Model ◽  
Single Gene ◽  
The Elderly ◽  
Developed Countries ◽  
Biochemical Properties ◽  
Age Related Macular Degeneration ◽  
Autosomal Dominant Disorder ◽  
Age Related ◽  
Sorsby's Fundus Dystrophy

Sorsby's fundus dystrophy (SFD) is a rare autosomal dominant disorder that results in degeneration of the macular region of the retina, with onset usually in the fourth to fifth decade of life. It leads to the rapid loss of central vision, often followed by further loss of peripheral vision. SFD shares several pathological features commonly found in the ‘wet’ or exudative form of age-related macular degeneration (AMD), the most common cause of blindness in the elderly in developed countries. These phenotypic similarities have led to SFD being proposed as an acceptable genetic model for AMD. Whereas AMD appears to have a complex aetiology, with both genetic and environmental factors playing a role, SFD has been shown to be a single-gene disorder, linked to mutations in exon 5 of the tissue inhibitor of metalloproteinases 3 (TIMP3) gene on chromosome 22q12-q13. This review confines itself to a discussion of the known biochemical properties of the wild-type and SFD TIMP3 proteins and attempts to relate these to the pathology encountered in SFD patients. We also discuss briefly how, despite the lack of inherited mutations in the structural gene, the TIMP3 protein might play a role in the onset and progression of AMD.

Tractional Maculopathies in Age-related Macular Degeneration

2012 ◽  
Vol 05 (02) ◽  
pp. 119 ◽  
Author(s):  
Cynthia X Qian ◽  
William J Foster ◽  
Flavio A Rezende ◽  
◽  
◽  
...  
Keyword(s):  
Macular Degeneration ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
The Elderly ◽  
Developed Countries ◽  
Age Related Macular Degeneration ◽  
The Past ◽  
Age Related ◽  
Surgical Options ◽  
Made In

Age-related macular degeneration (AMD) is the leading cause of blindness among the elderly in developed countries. Much progress has been and continues to be made in search of better visual outcomes for dry and exudative AMD. Over the past decade, the importance of vitreomacular attachments has been recognized in AMD. In this article, we better characterize and describe vitreomacular and photoreceptor-retinal pigment epithelium interface relationships in AMD among treated and untreated patients and describe the surgical options available as well as their outcomes and possible complications.

Ophthalmopathology of the old people. Population research. Preliminary results

2021 ◽  
pp. 9-12
Author(s):  
M.M. Bikbov ◽  
◽  
T.R. Gilmanshin ◽  
R.M. Zainullin ◽  
G.M. Kazakbaeva ◽  
...  
Keyword(s):  
Old Age ◽  
Vision Loss ◽  
The Elderly ◽  
Developed Countries ◽  
Diagnostic Methods ◽  
Age Related Macular Degeneration ◽  
Ophthalmological Examination ◽  
Old People ◽  
Age Related ◽  
Region Of Residence

Currently, the percentage of old people is growing from year to year in developed countries their share ranges from 10 to 15% of the entire population. In connection with such trends the issue of old age should be given special attention. Purpose. Identify the main risk factors and assess the incidence of ophthalmopathology among the elderly. Material and methods. In Ufa Eye Research Institute was examined 1526 people over 85 years old. Ophthalmological examination included standard and additional diagnostic methods: ultrasound biometry, keratotopography, computed perimetry, ophthalmoscopy using a fundus camera, optical coherence tomography. Results. The main cause of vision loss in the elderly was cataract – 41.7%, followed by AMD – 32.6%, then glaucoma – 10.1%, other eye diseases – 8.1%, optic disc pathology – 54.1% and diabetic angioretinopathy – 2.4%. The most significant association of the ophthalmopathology development is associated with such factors as age, gender, region of residence, axial length of the eye. Conclusions. Timely detection of ophthalmic pathology among old people will allow to preserve the patients visual functions, increase the social rehabilitation level and ensure their active and creative longevity. Key words: old age, cataracts, age-related macular degeneration, glaucoma.

scholarly journals Oxidative Stress, Hypoxia, and Autophagy in the Neovascular Processes of Age-Related Macular Degeneration

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Janusz Blasiak ◽  
Goran Petrovski ◽  
Zoltán Veréb ◽  
Andrea Facskó ◽  
Kai Kaarniranta
Keyword(s):  
Oxidative Stress ◽  
Macular Degeneration ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
The Elderly ◽  
Developed Countries ◽  
The Body ◽  
Age Related Macular Degeneration ◽  
Age Related ◽  
The Rich

Age-related macular degeneration (AMD) is the leading cause of severe and irreversible loss of vision in the elderly in developed countries. AMD is a complex chronic neurodegenerative disease associated with many environmental, lifestyle, and genetic factors. Oxidative stress and the production of reactive oxygen species (ROS) seem to play a pivotal role in AMD pathogenesis. It is known that the macula receives the highest blood flow of any tissue in the body when related to size, and anything that can reduce the rich blood supply can cause hypoxia, malfunction, or disease. Oxidative stress can affect both the lipid rich retinal outer segment structure and the light processing in the macula. The response to oxidative stress involves several cellular defense reactions, for example, increases in antioxidant production and proteolysis of damaged proteins. The imbalance between production of damaged cellular components and degradation leads to the accumulation of detrimental products, for example, intracellular lipofuscin and extracellular drusen. Autophagy is a central lysosomal clearance system that may play an important role in AMD development. There are many anatomical changes in retinal pigment epithelium (RPE), Bruch’s membrane, and choriocapillaris in response to chronic oxidative stress, hypoxia, and disturbed autophagy and these are estimated to be crucial components in the pathology of neovascular processes in AMD.

scholarly journals Current understanding of Age-related macular degeneration

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Swathi Kanduri ◽  
Monica Liliana Acosta ◽  
Trevor Sherwin ◽  
Charles Ninian John McGhee ◽  
Colin R Green
Keyword(s):  
Macular Degeneration ◽  
Elderly Population ◽  
The Elderly ◽  
Developed Countries ◽  
Age Related Macular Degeneration ◽  
Current Understanding ◽  
Therapeutic Approaches ◽  
Age Related ◽  
The Developed Countries ◽  
Irreversible Blindness

Age-related macular degeneration (AMD) is the leading cause of irreversible blindness in the elderly population 50 years of age or older in the developed countries. This review discusses the traditional clinical and histopathological presentation of AMD, epidemiology and genetics component in relation to the current understanding of the vascular nature of the disease. Therapeutic approaches to treat the disease are also included in the review.

scholarly journals Tractional Maculopathies in Age-related Macular Degeneration

2012 ◽  
Vol 06 (05) ◽  
pp. 300
Author(s):  
Cynthia X Qian ◽  
William J Foster ◽  
Flavio A Rezende ◽  
◽  
◽  
...  
Keyword(s):  
Macular Degeneration ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
The Elderly ◽  
Developed Countries ◽  
Age Related Macular Degeneration ◽  
The Past ◽  
Age Related ◽  
Surgical Options ◽  
Made In

Age-related macular degeneration (AMD) is the leading cause of blindness among the elderly in developed countries. Much progress has been and continues to be made in search of better visual outcomes for dry and exudative AMD. Over the past decade, the importance of vitreomacular attachments has been recognised in AMD. In this article, the authors better characterise and describe vitreomacular and photoreceptor-retinal pigment epithelium interface relationships in AMD among treated and untreated patients and describe the surgical options available as well as their outcomes and possible complications.

scholarly journals Evidence-Based Practice and Trends in Visual Rehabilitation for Patients with Age-Related Macular Degeneration

2021 ◽  
Author(s):  
Luis Leal Vega ◽  
Irene Alcoceba Herrero ◽  
Adrián Martín Gutiérrez ◽  
Joaquín Herrera Medina ◽  
Natalia Martín Cruz ◽  
...  
Keyword(s):  
Macular Degeneration ◽  
The Elderly ◽  
Developed Countries ◽  
Functional Independence ◽  
Geographic Atrophy ◽  
Age Related Macular Degeneration ◽  
Evidence Based ◽  
Visual Rehabilitation ◽  
Evidence Based Practices ◽  
Age Related

Age-related macular degeneration (AMD) is a common, chronic, and progressive eye disease that is considered the leading cause of visual loss among the elderly in developed countries. Advanced AMD, including choroidal neovascularization (CNV) or geographic atrophy (GA), is associated with substantial and progressive visual impairment that can lead to a significant reduction in functional independence and quality of life (QoL) for affected individuals, whose number is expected to increase in the coming years in line with population growth and ageing. In this context, while an important part of medical care is focused on preventing the progression of the disease, Visual Rehabilitation (VR) aims to address its consequences by providing these patients with a number of strategies to achieve their goals and participate autonomously, actively and productively in society. This chapter aims to provide an update on evidence-based practices in the field and how modern technologies play an important role in the development of new VR approaches.

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