1
|
Moura MT, Badaraco J, Sousa RV, Lucci CM, Rumpf R. Improved functional oocyte enucleation by actinomycin D for bovine somatic cell nuclear transfer. Reprod Fertil Dev 2019; 31:1321-1329. [PMID: 30986366 DOI: 10.1071/rd18164] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 02/05/2019] [Indexed: 11/23/2022] Open
Abstract
Somatic cell nuclear transfer (SCNT) allows animal cloning but remains technically challenging. This study investigated limitations to functional oocyte enucleation by actinomycin D (AD) as a means of making SCNT easier to perform. Denuding oocytes or inhibiting transcription before AD treatment revealed that the toxicity of this compound during bovine oocyte maturation is mediated by cumulus cells. Exposure of denuded oocytes to higher concentrations of AD (5-20μgmL-1 ) and stepwise reductions of the incubation period (from 14.0 to 0.25h) led to complete inhibition of parthenogenetic development. Bovine SCNT using this improved AD enucleation protocol (NT(AD)) restored cleavage rates compared with rates in the parthenogenetic and SCNT controls (P(CTL) and NT(CTL) respectively). However, NT(AD) was associated with increased caspase-3 activity in cleavage stage embryos and did not recover blastocyst rates. The removal of AD-treated oocyte spindle before reconstruction (NT(AD+SR)) improved embryo development and reduced caspase-3 activity to levels similar to those in the P(CTL) and NT(CTL) groups. Furthermore, mid-term pregnancies were achieved using NT(AD+SR) blastocysts. In conclusion, improvements in AD functional enucleation for bovine SCNT circumvents most cellular roadblocks to early embryonic development and future investigations must focus on restoring blastocyst formation.
Collapse
Affiliation(s)
- Marcelo T Moura
- Laboratório de Reprodução Animal, Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica, Av. W5 Norte (final), CP 02372, CEP 70770-900, Brasília, DF, Brazil; and Departamento de Agronomia e Medicina Veterinária, Universidade de Brasília, Instituto Central de Ciências Sul, Campus Universitário Darci Ribeiro, CEP 70297-400, Brasília, DF, Brazil; and Present address: Laboratório de Biologia Celular, Universidade Federal de São Paulo, Campus Diadema, CEP 09972-270, Diadema, SP, Brazil; and Corresponding author
| | - Jeferson Badaraco
- Laboratório de Reprodução Animal, Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica, Av. W5 Norte (final), CP 02372, CEP 70770-900, Brasília, DF, Brazil
| | - Regivaldo V Sousa
- Laboratório de Reprodução Animal, Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica, Av. W5 Norte (final), CP 02372, CEP 70770-900, Brasília, DF, Brazil
| | - Carolina M Lucci
- Departamento de Agronomia e Medicina Veterinária, Universidade de Brasília, Instituto Central de Ciências Sul, Campus Universitário Darci Ribeiro, CEP 70297-400, Brasília, DF, Brazil
| | - Rodolfo Rumpf
- Laboratório de Reprodução Animal, Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica, Av. W5 Norte (final), CP 02372, CEP 70770-900, Brasília, DF, Brazil; and Departamento de Agronomia e Medicina Veterinária, Universidade de Brasília, Instituto Central de Ciências Sul, Campus Universitário Darci Ribeiro, CEP 70297-400, Brasília, DF, Brazil; and Present address: Geneal Biotecnologia, Rodovia BR-050, Km 184, CEP 38038-050, Uberaba, MG, Brazil
| |
Collapse
|
2
|
Non-invasive assessment of porcine oocyte quality by supravital staining of cumulus-oocyte complexes with lissamine green B. ZYGOTE 2017; 24:418-27. [PMID: 27172057 DOI: 10.1017/s0967199415000349] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
We evaluated the usefulness of lissamine green B (LB) staining of cumulus-oocyte complexes (COC) as a non-invasive method of predicting maturational and developmental competence of slaughterhouse-derived porcine oocytes cultured in vitro. Cumulus cells of freshly aspirated COCs were evaluated either morphologically on the basis of thickness of cumulus cell layers, or stained with LB, which penetrates only non-viable cells. The extent of cumulus cell staining was taken as an inverse indicator of membrane integrity. The two methods of COC grading were then examined as predictors of nuclear maturation and development after parthenogenetic activation. In both cases LB staining proved a more reliable indicator than morphological assessment (P < 0.05). The relationship between LB staining and cumulus cell apoptosis was also examined. Terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay for DNA fragmentation revealed that oocytes within COCs graded as low quality by either LB staining or visual morphology showed significantly greater DNA fragmentation (P < 0.05) than higher grades, and that LB and visual grading were of similar predictive value. Expression of the stress response gene TP53 showed significantly higher expression in COCs graded as low quality by LB staining. However expression of the apoptosis-associated genes BAK and CASP3 was not significantly different between high or low grade COCs, suggesting that mRNA expression of BAK and CASP3 is not a reliable method of detecting apoptosis in porcine COCs. Evaluation of cumulus cell membrane integrity by lissamine green B staining thus provides a useful new tool to gain information about the maturational and developmental competence of porcine oocytes.
Collapse
|
3
|
Handmade cloning: recent advances, potential and pitfalls. J Anim Sci Biotechnol 2015; 6:43. [PMID: 26473031 PMCID: PMC4606838 DOI: 10.1186/s40104-015-0043-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 09/21/2015] [Indexed: 12/02/2022] Open
Abstract
Handmade cloning (HMC) is the most awaited, simple and micromanipulator-free version of somatic cell nuclear transfer (SCNT). The requirement of expensive micromanipulators and skilled expertise is eliminated in this technique, proving it as a major revolution in the field of embryology. During the past years, many modifications have been incorporated in this technique to boost its efficiency. This alternative approach to micromanipulator based traditional cloning (TC) works wonder in generating comparable or even higher birth rates in addition to declining costs drastically and enabling cryopreservation. This technique is not only applicable to intraspecies nuclear transfer but also to interspecies nuclear transfer (iSCNT) thus permitting conservation of endangered species. It also offers unique possibilities for automation of SCNT which aims at production of transgenic animals that can cure certain human diseases by producing therapeutics hence, providing a healthier future for the wellbeing of humans. The present review aims at highlighting certain aspects of HMC including recent advancements in procedure and factors involved in elevating its efficiency besides covering the potentials and pitfalls of this technique.
Collapse
|
4
|
Yin Y, Mei M, Zhang D, Zhang S, Fan A, Zhou H, Li Z. The Construction of Cloned Sika Deer Embryos (
Cervus nippon hortulorum
) by Demecolcine Auxiliary Enucleation. Reprod Domest Anim 2013; 49:164-9. [DOI: 10.1111/rda.12246] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Accepted: 09/18/2013] [Indexed: 11/29/2022]
Affiliation(s)
- Y Yin
- Jilin Provincial Key Laboratory of Animal Embryo Engineering The Center for Animal Embryo Engineering of Jilin Province, College of Animal Science and Veterinary Medicine, Jilin University Changchun Jilin
- College of Veterinary Medicine, Northwest A & F University Yangling Shaanxi
| | - M Mei
- Heping Campus Hospital Jilin University Changchun Jilin
| | - D Zhang
- Hebei University of Engineering Handan Hebei
| | - S Zhang
- Jilin Provincial Key Laboratory of Animal Embryo Engineering The Center for Animal Embryo Engineering of Jilin Province, College of Animal Science and Veterinary Medicine, Jilin University Changchun Jilin
| | - A Fan
- Jilin Provincial Key Laboratory of Animal Embryo Engineering The Center for Animal Embryo Engineering of Jilin Province, College of Animal Science and Veterinary Medicine, Jilin University Changchun Jilin
| | - H Zhou
- Department of Genetics Inner Mongolia Medical College Hohhot Inner Mongolia China
| | - Z Li
- Jilin Provincial Key Laboratory of Animal Embryo Engineering The Center for Animal Embryo Engineering of Jilin Province, College of Animal Science and Veterinary Medicine, Jilin University Changchun Jilin
| |
Collapse
|
5
|
Srirattana K, Sripunya N, Sangmalee A, Imsoonthornruksa S, Liang Y, Ketudat-Cairns M, Parnpai R. Developmental potential of vitrified goat oocytes following somatic cell nuclear transfer and parthenogenetic activation. Small Rumin Res 2013. [DOI: 10.1016/j.smallrumres.2012.10.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
6
|
Vajta G, Callesen H. Establishment of an efficient somatic cell nuclear transfer system for production of transgenic pigs. Theriogenology 2012; 77:1263-74. [DOI: 10.1016/j.theriogenology.2011.10.040] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2011] [Revised: 10/28/2011] [Accepted: 10/30/2011] [Indexed: 10/14/2022]
|