Paper Information

Journal:   INTERNATIONAL JOURNAL OF REPRODUCTIVE BIOMEDICINE (IRANIAN JOURNAL OF REPRODUCTIVE MEDICINE)   October 2016 , Volume 14 , Number 10; Page(s) 649 To 656.
 
Paper: 

Effect of L-carnitine on in vitro developmental rate, the zona pellucida and hatching of blastocysts and their cell numbers in mouse embryos

 
 
Author(s):  Khanmohammadi Nasrin, Movahedin Mansoureh, Safari Manouchehr, Sameni Hamid Reza, Yousefi Behpour, Jafari Behnaz, ZARBAKHSH SAM*
 
* Research Center of Nervous System Stem Cells, Department of Anatomy, Faculty of Medicine, Semnan University of Medical Sciences, Semnan, Iran
 
Abstract: 
L-carnitine (LC) is an antioxidant with the ability to promote the growth in vitro embryo. Objective: The goal was to evaluate the effect of LC on some indicators of embryo development and blastocyst quality including zona pellucid (ZP) thickness, the hatching of blastocysts and their cell numbers. Materials and Methods: Mouse embryos were randomly divided into five groups and incubated with different concentrations of LC (I; 0, II; 0. 5, III; 1, IV; 2 and V; 4 mg/ml) from 2-cell to hatched blastocyst. The percentage of blastocysts and hatched blastocysts was calculated. Blastocysts ZP thickness was measured and the number of blastocyst cells was counted using Hoechst and propidium iodide (PI) staining. Results: The results showed concentration of 0. 5 mg/ml of LC had an antioxidant effect as in this group, the percentage of blastocysts and hatched blactocysts (p=0. 01), the ZP thickness (p=0. 00) and the number of blastocyst inner cell mass were significantly more favorable than the control group (p=0. 03); and concentration of 4 mg/ml of LC had a toxic effect on embryo development and blastocyst quality (p=0. 00). Conclusion: The results suggest that LC may increase the number of blastocyst cells, which probably helps to expand the blastocyst and thinning of the ZP thickness and, therefore, creating a successful hatching for implantation.
 
Keyword(s): L-carnitine,Embryo culture,Zona pellucida,Blastocyst inner cell mass
 
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