A Phase I Open Label, Multicenter Study to Assess the Safety, Tolerability, Pharmacokinetics, and Anti-Tumor Activity of ZN-c5 Alone and in Combination With Palbociclib in Subjects With Previously Treated Estrogen Receptor Positive, Human Epidermal Growth Factor Receptor-2 Negative Advanced Breast Cancer
		
	
		
			
				| Sponsor: | 
				Zeno Pharmaceuticals | 
			
			
			
				| Enrolling: | 
									Male and Female Patients | 
							
						
			
			
                            
                    | IRB Number: | 
                    AAAS0192 | 
                
            
			 
				
					| U.S. Govt. ID: | 
					NCT03560531 | 
				
					
			
				| Contact:  | 
				Research Nurse Navigator: 212-342-5162 / cancerclinicaltrials@cumc.columbia.edu | 
			
		
	
		This research study involves receiving an experimental drug referred to as ZN-c5.  This is the first study in humans using ZN-c5.  The purpose of this research study is to test the safety of ZN-c5 at different dose levels.  This study is designed to find out what effects, good and/or bad, ZN-c5 has on participants with breast cancer.  Participants in both parts of the study may also be assigned to receive ZN-c5 alone, or ZN-c5 in addition to an FDA-approved medication for breast cancer called palbociclib (IBRANCE, Pfizer Inc.).
	
			This study is closed
	
	   	
		Investigator
		
		Katherine Crew, MD
		
					   
	
		
		
		
			
				
					| Are you 18 years or older? | 
					Yes | 
					No | 
				
				
									
						| Have you been diagnosed with Breast cancer? | 
						Yes | 
						No | 
					
								
									
						| Have you had no more than 2 prior treatments for Breast Cancer? | 
						Yes | 
						No | 
					
				
									
						| Are you willing to undergo additional biopsies? | 
						Yes | 
						No |