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              Research 
(Published 
online: 15-05-2014) 
              9. Effect of harvesting technique and 
              presence or absence of corpus luteum on in vitro development after 
              parthenogenetic activation of oocytes recovered from buffalo 
              ovaries
              - Yelisetti Uma Mahesh, Murakonda Mutha Rao, Poda 
              Sudhakar and Krothapalli Raja Surya Sambasiva RaoVeterinary World, 7(5): 315-320
 
                
              
   
                
                
doi: 
              10.14202/vetworld.2014.315-320 
                
              Yelisetti Uma Mahesh: Livestock Research Station, Lam 
              Farm, Sri Venkateswara Veterinary University, Guntur, Andhra 
              Pradesh - 522034, India; Department of Biotechnology, University 
              College, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur, 
              Andhra Pradesh-522510, India.
 
              Murakonda Mutha Rao: Livestock Research Station, Lam Farm, 
              Sri Venkateswara Veterinary University, Guntur, Andhra Pradesh - 
              522034, India 
              Poda Sudhakar: Department of Biotechnology, University 
              College, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur, 
              Andhra Pradesh-522510, India.  
              Krothapalli Raja Surya Sambasiva Rao: Department of 
              Biotechnology, University College, Acharya Nagarjuna University, 
              Nagarjuna Nagar, Guntur, Andhra Pradesh-522510, India. 
              Received: 28-02-2014, Revised: 03-04-2014, Accepted: 09-04-2014, 
              Published online: 15-05-2014
 
              
              Corresponding author: Yelisetti Uma Mahesh, email: 
              maheshyelisetti@gmail.com, Cell: +91-9849252352
 
 
              Abstract 
 
              Aim: The present study was 
              aimed at assessing the influence of three oocyte harvesting 
              (aspiration, puncture and slicing) methods and presence or absence 
              of corpus luteum (CL) on recovery efficiency and subsequent in 
              vitro maturation and parthenogenetic development of immature 
              oocytes recovered from buffalo ovaries. Materials and Methods: Buffalo ovaries were collected from 
              local slaughter house and oocytes were collected by using 
              aspiration, puncture and slicing methods. Collected oocytes were 
              matured in vitro in TCM-199 medium supplemented with 10% fetal 
              bovine serum (FBS), 0.22 mM sodium pyruvate, 10 µg/mL of 
              follicle-stimulating hormone, 6 IU/mL luteinizing hormone, 1 µg/mL 
              17-β estradiol, 100 IU/mL penicillin and 0.1 mg/mL streptomycin. 
              In vitro matured oocytes were activated by ethanol (7%) followed 
              by 6-DMAP (2mM) and cultured to assess the in vitro developmental 
              capacity.
 Results: The average total number of oocytes recovered per 
              ovary was significantly (P<0.05) higher in slicing (7.88±0.54) 
              than the aspiration (2.50±0.11) and puncture (3.59±0.18) methods. 
              The number of culture grade oocytes per ovary was significantly 
              higher in slicing (5.40±0.29) than in puncture (2.45±0.12) and 
              aspiration (1.94±0.11) methods. However, the percentage of culture 
              grade oocytes was higher in the aspiration method (77.67%), 
              compared to the puncture (68.24%) or slicing (68.51%) methods. The 
              oocyte recovery was significantly lower (P<0.05) in CL containing 
              ovaries than that of ovaries without CL (3.01vs.5.17). However, 
              the presence of CL did not affect the oocytes ability to reach the 
              MII stage (73.07%vs.75.77%). The results showed that the rates of 
              Cumulus oocyte complexes (COCs) that reached the metaphase-II 
              (M-II) stage were similar in aspiration, puncture and slicing 
              techniques (77.29, 76.12 and 73.92% respectively). The oocytes 
              obtained were matured and parthenogenetically activated in vitro 
              using ethanol and 6-DMAP. The oocyte collection methods and 
              presence or absence of CL did not influence the subsequent 
              embryonic developmental competence.
 Conclusion: It can be concluded that slicing method can be 
              used as an alternative to aspiration and puncture methods to 
              recover oocytes from buffalo ovaries; as slicing method resulted 
              higher oocyte yield and similar in vitro development rate when 
              compared with other methods.
 Keywords: aspiration, buffalo, IVM, oocytes, 
              parthenogenetic activation, puncture, slicing.
 
 
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