Generation of Retinal Progenitor Cells from Human Induced Pluripotent Stem Cell-Derived Spherical Neural Mass.
	    		
		   		
		   			
		   		
	    	
    	 
    	10.1007/s13770-016-0021-2
   		
        
        	
        	
        	
        		- Author:
	        		
		        		
		        		
			        		Cheolmin YUN
			        		
			        		
			        		
			        			1
			        			
			        		
			        		
			        		
			        		
			        		;
		        		
		        		
		        		
			        		Jaeryung OH
			        		
			        		;
		        		
		        		
		        		
			        		Boram LEE
			        		
			        		;
		        		
		        		
		        		
			        		Ja Myong LEE
			        		
			        		;
		        		
		        		
		        		
			        		Togloom ARIUNAA
			        		
			        		;
		        		
		        		
		        		
			        		Kuhl HUH
			        		
			        		
		        		
		        		
		        		
		        		
		        			
			        		
			        		Author Information
			        		
		        		
		        		
			        		
			        		
			        			1. Department of Ophthalmology, Korea University, College of Medicine, 126-1 Anam-dong 5-ga, Sungbuk-gu, Seoul 136-705, Korea. ojr4991@korea.ac.kr
			        		
		        		
	        		
        		 
        	
        	
        	
        		- Publication Type:Original Article
 
        	
        	
        		- Keywords:
        			
	        			
	        				
	        				
			        		
				        		Human induced pluripotent stem cells;
			        		
			        		
			        		
				        		Retinal photoreceptor;
			        		
			        		
			        		
				        		Retinal progenitor cell;
			        		
			        		
			        		
				        		Spherical neural mass
			        		
			        		
	        			
        			
        		
 
        	
            
            	- MeSH:
            	
	        			
	        				
	        				
				        		
					        		Animals;
				        		
			        		
				        		
					        		Cell Differentiation;
				        		
			        		
				        		
					        		Humans*;
				        		
			        		
				        		
					        		Immunohistochemistry;
				        		
			        		
				        		
					        		Induced Pluripotent Stem Cells;
				        		
			        		
				        		
					        		Methods;
				        		
			        		
				        		
					        		Mice;
				        		
			        		
				        		
					        		Neurons;
				        		
			        		
				        		
					        		Photoreceptor Cells, Vertebrate;
				        		
			        		
				        		
					        		Polymerase Chain Reaction;
				        		
			        		
				        		
					        		Retina;
				        		
			        		
				        		
					        		Retinal Pigment Epithelium;
				        		
			        		
				        		
					        		Retinaldehyde*;
				        		
			        		
				        		
					        		Reverse Transcription;
				        		
			        		
				        		
					        		Stem Cells*;
				        		
			        		
				        		
					        		Transcription Factors;
				        		
			        		
				        		
					        		Up-Regulation
				        		
			        		
	        			
	        			
            	
            	
 
            
            
            	- From:
	            		
	            			Tissue Engineering and Regenerative Medicine
	            		
	            		 2017;14(1):39-47
	            	
            	
 
            
            
            	- CountryRepublic of Korea
 
            
            
            	- Language:English
 
            
            
            	- 
		        	Abstract:
			       	
			       		
				        
				        	Spherical neural mass (SNM) is a mass of neural precursors that have been used to generate neuronal cells with advantages of long-term passaging capability with high yield, easy storage, and thawing. In this study, we differentiated neural retinal progenitor cells (RPCs) from human induced pluripotent stem cells (hiPSC)-derived SNMs. RPCs were differentiated from SNMs with a noggin/fibroblast growth factor-basic/Dickkopf-1/Insulin-like growth factor-1/fibroblast growth factor-9 protocol for three weeks. Human RPCs expressed eye field markers (Paired box 6) and early neural retinal markers (Ceh-10 homeodomain containing homolog), but did not photoreceptor marker (Opsin 1 short-wave-sensitive). Reverse transcription polymerase chain reaction revealed that early neural retinal markers (Mammalian achaete-scute complex homolog 1, mouse atonal homolog 5, neurogenic differentiation 1) and retinal fate markers (brain-specific homeobox/POU domain transcription factor 3B and recoverin) were upregulated, while the marker of retinal pigment epithelium (microphthalmia-associated transcription factor) only showed slight upregulation. Human RPCs were transplanted into mouse (adult 8 weeks old C57BL/6) retina. Cells transplanted into the mouse retina matured and expressed markers of mature retinal cells (Opsin 1 short-wave-sensitive) and human nuclei on immunohistochemistry three months after transplantation. Development of RPCs using SNMs may offer a fast and useful method for neural retinal cell differentiation.