Mesenchymal Stem Cells Targeting of Systemic Disorders in Age-related Macular Degeneration

2016 ◽  
Vol 5 (1) ◽  
pp. 60-70 ◽  
Author(s):  
Jian Xiong Wang ◽  
Marten Erik Brelén ◽  
Tsz Kin Ng
2019 ◽  
pp. 143-148
Author(s):  
L.K. Moshetova ◽  
◽  
O.I. Abramova ◽  
I.N. Saburina ◽  
K.I. Turkina ◽  
...  

2021 ◽  
Vol 21 (4) ◽  
pp. 215-219
Author(s):  
A.K. Drakon ◽  
◽  
A.G. Kurguzova ◽  
V.M. Sheludchenko ◽  
N.B. Korchazhkina ◽  
...  

Age-related macular degeneration (AMD) is the leading cause of blindness in people over 55 in developed countries. Moreover, the number of these patients will increase growth as life expectancy increases. It is estimated that late AMD accounts for half of blindness and low vision cases in European countries. A myriad of studies is currently underway to discover cutting-edge, effective therapeutic modalities. Gene therapy is a novel alternative to regular intravitreal injections of anti-VEGF agents for late wet AMD. This technique’s heart is a specific gene delivery to target cells to generate natural VEGF inhibitors. Gene therapy affecting the complement system to deactivate its end product, the membrane attack complex, is reasonable in late atrophic AMD. Studies on stem cell therapy for late atrophic AMD undergo as well. It was demonstrated that retinal pigment epithelium (RPE) cells derived from human embryonic stem cells or induced pluripotent stem cells express typical RPE markers that can phagocytize photoreceptor segments. Electrical stimulation and magnet therapy are already introduced into clinical practice to rehabilitate patients with late AMD. Magnetic and electrical fields improve impulse transmitting, activate intracellular and tissue regeneration of the retina. Recent findings are promising but require further in-depth studies. Keywords: age-related macular degeneration, retinal scar, gene therapy, stem cells, physiotherapy, rehabilitative medicine. For citation: Drakon A.K., Kurguzova A.G., Sheludchenko V.M., Korchazhkina N.B. Non-medical treatment for late age-related macular degeneration. Russian Journal of Clinical Ophthalmology. 2021;21(4):215–219 (in Russ.). DOI: 10.32364/2311-7729-2021-21-4-215-219.


2020 ◽  
Vol 12 (4) ◽  
pp. 35-41
Author(s):  
Kirill Yu. Gayduk ◽  
Sergey V. Churashov ◽  
Alexey N. Kulikov

Age-related macular degeneration (AMD) is the most common disease of the macula the area responsible for central vision. With regard to the pathogenesis of AMD, the main focus of most researchers is on the pathological processes occurring in the retinal pigment epithelium (RPE), which is considered as the main target of the disease. For the treatment of the dry form of the disease, which accounts for about 90% of all AMD cases, up to now no effective treatment methods were elaborated, while in the therapy of the wet form, antiangiogenic therapy, photodynamic therapy, and surgical treatment methods have been used with concrete success. Stem cells, possessing enormous therapeutic potential, are gradually being introduced into medical technologies, including ophthalmology. A number of pre-clinical studies have proven the safety of using cultured cells of the RPE, which gave rise to the beginning of clinical trials of the use of stem cells in the treatment of AMD patients. The review analyzes the data of scientific literature on the current understanding of the pathogenesis of AMD, pathogenetically substantiated therapies, including those using cell-based technologies, prospects and problems of using stem cells in the treatment of AMD patients.


2018 ◽  
Vol 28 (1) ◽  
pp. 80-86
Author(s):  
Caner Kara ◽  
Pınar Ç. Özdal ◽  
Emrullah Beyazyıldız ◽  
Nurgül E. Özcan ◽  
Mehmet Y. Teke ◽  
...  

Purpose: To investigate the levels of circulating CD34+ stem cells in patients with neovascular type age-related macular degeneration (AMD) and its relation with clinical and optical coherence tomography (OCT) findings. Methods: The study consisted of 55 patients: 28 patients (18 male and 10 female) with neovascular type AMD as a study group and 27 patients (12 male and 15 female) scheduled for cataract surgery as a control group. The level of CD34+ stem cells was measured by flow cytometry. Demographic and clinical data were recorded. Results: The mean ages of patients in the study and control groups were 71 ± 8 and 68 ± 6 years, respectively. There was no statistically significant difference in terms of age, sex, or systemic disease association between study and control groups. However, smoking status was significantly higher in the study group (67.9% vs 37.0%; p = 0.02). Stem cell levels were significantly higher in the study group (1.5 ± 0.9 vs 0.5 ± 0.3; p<0.001), but there was no relation between stem cell levels and clinical and OCT findings. Conclusions: Increased circulating CD34+ stem cell levels were observed in patients with choroidal neovascular membrane associated with AMD, but no significant relation was found between cell levels and clinical and OCT findings.


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