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              Open Access  
 
              
              
              
              Research 
              
              
(Published 
				online: 23-01-2017)  
              15. 
				
              
              Preparation of goat and rabbit anti-camel 
              immunoglobulin G whole molecule labeled with horseradish 
              peroxidase - 
              
              Eman Hussein Abdel-Rahman, Jakeen Kamal El-Jakee, Mahmoud Essam 
              Hatem, Nagwa Sayed Ata and Ehab Ali Fouad 
              
              Veterinary World, 10(1): 92-100   
              
   
                
                
doi: 
              
				
				10.14202/vetworld.2017.92-100 
                
                
                Eman Hussein Abdel-Rahman: 
                
                Department of Parasitology and Animal Diseases, National 
                Research Centre, Egypt. 
              
              Jakeen Kamal El-Jakee: 
              
              Department of Microbiology, Faculty of Veterinary Medicine, Cairo 
              University, Egypt. 
              
              Mahmoud Essam Hatem: 
              
              Department of Microbiology, Faculty of Veterinary Medicine, Cairo 
              University, Egypt. 
              
              Nagwa Sayed Ata: 
              
              Department of Microbiology and Immunology, National Research 
              Centre, Egypt. 
              
              Ehab Ali Fouad: 
              
              Department of Microbiology and Immunology, National Research 
              Centre, Egypt.   
              
              Received: 26-10-2016, Accepted: 21-12-2016, Published online: 
              23-01-2017   
				
              	
              	Corresponding author: 
              	
				
                Ehab Ali Fouad, e-mail: ehabfoaud@gmail.com 
 
              Citation: 
              
              Abdel-Rahman EH, El-Jakee JK, Hatem ME, Ata NS, Fouad EA (2017) 
              Preparation of goat and rabbit anti-camel immunoglobulin G whole 
              molecule labeled with horseradish peroxidase, 
              
              Veterinary World, 10(1): 92-100. 
 
              
				Abstract 
 
              
              
              Aim: 
              
              As the labeled anti-camel immunoglobulins (Igs) with enzymes for 
              enzyme-linked immunosorbent assay (ELISA) are unavailable in the 
              Egyptian market, the present investigation was directed for 
              developing local labeled anti-camel IgG with horseradish 
              peroxidase (HRP) to save hard curacy. 
              
              
              Materials and Methods: 
              
              For purification of camel IgG whole molecule, camel sera was 
              preliminary precipitated with 50% saturated ammonium sulfate and 
              dialyzed against 15 mM phosphate-buffered saline pH 7.2 then 
              concentrated. This preparation was further purified by protein A 
              sepharose affinity column chromatography. The purity of the eluted 
              camel IgG was tested by sodium dodecyl sulfate polyacrylamide gel 
              electrophoresi. Anti-camel IgG was prepared by immunization of 
              goats and rabbits separately, with purified camel IgG. The 
              anti-camel IgG was purified by protein A sepharose affinity column 
              chromatography. Whole molecule anti-camel IgG was conjugated with 
              HRP using glutraldehyde based assay. Sensitivity and specificity 
              of prepared conjugated secondary antibodies were detected using 
              positive and negative camel serum samples reacted with different 
              antigens in ELISA, respectively. The potency of prepared 
              conjugated antibodies was evaluated compared with protein A HRP. 
              The stability of the conjugate at −20°C during 1 year was assessed 
              by ELISA. 
              
              
              Results: 
              
              The electrophoretic profile of camel IgG showed four bands of 
              molecular weight 63, 52, 40 and 33 kDa. The recorded sensitivity 
              and specificity of the product are 100%. Its potency is also 100% 
              compared to 58-75% of commercial protein A HRP. The conjugates are 
              stable for 1 year at −20°C as proved by ELISA. 
              
              
              Conclusion: 
              
              Collectively, this study introduces goat and rabbit anti-camel IgG 
              whole molecules with simple, inexpensive method, with 100% 
              sensitivity, 100% specificity and stability up to 1 year at −20°C. 
              The important facet of the current study is saving hard curacy. 
              Future investigations are necessary for preparation of IgG 
              subclasses. 
              
              Keywords: 
              
              anti-camel immunoglobulin G, 
              
              Camelus dromedarius, 
              conjugation, horseradish peroxidase, purification. 
 
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