Multimodal Physiological Medicine and Macular Degeneration

2010 ◽  
Vol 04 (01) ◽  
pp. 101
Author(s):  
George W Rozakis ◽  
Sergey A Dzugan ◽  
◽  

Multimodal physiological medicine is the art of restoring physiology to youthful levels for the purpose of preventing and treating age-related diseases. Age-related macular degeneration (AMD) is presented as a disease that is caused by multiple errors of physiology including deficiencies of the steroidal hormones dehydroepiandrosterone (DHEA), pregnenolone, oestriol, oestradiol, oestrone, testosterone and progesterone as well as deficiencies in melatonin, zinc and other nutrients. It is proposed that multiple steroidal deficiency results in a compensatory attempt to synthesise hormones from cholesterol in the macula and that this conversion is dysfunctional in AMD, resulting in cholesterol-laden drusen. Furthermore, it is suggested that physiological errors indirectly lead to retinal pigment epithelial cell failure due to a decline in stem cell function. It is suggested that macular degeneration can be safely and more efficaciously treated with combinations of hormones, nutrients and vitamins and that such treatment strikes at the underlying cause(s) of the disease and may reduce associated cardiovascular risk.

2021 ◽  
Author(s):  
Sandra Petrus-Reurer ◽  
Alex R. Lederer ◽  
Laura Baqué-Vidal ◽  
Iyadh Douagi ◽  
Belinda Pannagel ◽  
...  

ABSTRACTHuman embryonic stem cell-derived retinal pigment epithelial cells (hESC-RPE) are a promising cell source to treat age-related macular degeneration (AMD). Despite several ongoing clinical studies, detailed single cell mapping of the transient cellular and molecular dynamics from the pluripotent state to mature RPE has not been performed. Here we conduct single-cell transcriptomic analyses of 25,718 cells during differentiation as well as in embryonic and adult retina references, revealing differentiation progression through an un-expected initial cell diversification recapitulating early embryonic development before converging towards an RPE lineage. We also identified NCAM1 to track and capture an intermediate retinal progenitor with the potential to give rise to multiple neuroepithelial lineages. Finally, we profiled hESC-RPE cells after subretinal transplantation into the rabbit eye, uncovering robust in vivo maturation towards an adult state. Our detailed evaluation of hESC-RPE differentiation supports the development of safe and efficient pluripotent stem cell-based therapies for AMD.


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