1
|
Klinsky OG, Wetten PA, Zanni-Ruiz E, Pavarotti MA, Berberian MV, Michaut MA. The light chain of tetanus toxin bound to arginine-rich cell-penetrating peptide inhibits cortical reaction in mouse oocytes. Front Cell Dev Biol 2023; 11:1259421. [PMID: 38033867 PMCID: PMC10684777 DOI: 10.3389/fcell.2023.1259421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Accepted: 10/30/2023] [Indexed: 12/02/2023] Open
Abstract
Introduction: Cortical reaction is a secretory process that occurs after a spermatozoon fuses with the oocyte, avoiding the fusion of additional sperm. During this exocytic event, the cortical granule membrane fuses with the oocyte plasma membrane. We have identified several molecular components involved in this process and confirmed that SNARE proteins regulate membrane fusion during cortical reaction in mouse oocytes. In those studies, we microinjected different nonpermeable reagents to demonstrate the participation of a specific protein in the cortical reaction. However, the microinjection technique has several limitations. In this work, we aimed to assess the potential of cell-penetrating peptides (CPP) as biotechnological tools for delivering molecules into oocytes, and to evaluate the functionality of the permeable tetanus toxin (bound to CPP sequence) during cortical reaction. Methods: Arginine-rich cell-penetrating peptides have demonstrated the optimal internalization of small molecules in mammalian cells. Two arginine-rich CPP were used in the present study. One, labeled with 5-carboxyfluorescein, to characterize the factors that can modulate its internalization, and the other, the permeable light chain of tetanus toxin, that cleaves the SNAREs VAMP1 and VAMP3 expressed in mouse oocytes. Results: Results showed that fluorescent CPP was internalized into the oocyte cytoplasm and that internalization was dependent on the concentration, time, temperature, and maturation stage of the oocyte. Using our functional assay to study cortical reaction, the light chain of tetanus toxin bound to arginine-rich cell-penetrating peptide inhibited cortical granules exocytosis. Discussion: Results obtained from the use of permeable peptides demonstrate that this CPP is a promising biotechnological tool to study functional macromolecules in mouse oocytes.
Collapse
Affiliation(s)
- Omar G. Klinsky
- Laboratorio de Biología Reproductiva y Molecular, Instituto de Histología y Embriología de Mendoza (IHEM), Universidad Nacional de Cuyo-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Mendoza, Argentina
- Facultad de Ciencias Médicas, Universidad Nacional de Cuyo, Mendoza, Argentina
| | - Paula A. Wetten
- Laboratorio de Biología Reproductiva y Molecular, Instituto de Histología y Embriología de Mendoza (IHEM), Universidad Nacional de Cuyo-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Mendoza, Argentina
- Facultad de Ciencias Médicas, Universidad Nacional de Cuyo, Mendoza, Argentina
| | - Emilia Zanni-Ruiz
- Laboratorio de Transporte Intracelular, Instituto de Histología and Embriología de Mendoza (IHEM), Universidad Nacional de Cuyo-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Mendoza, Argentina
| | - Martín A. Pavarotti
- Laboratorio de Transporte Intracelular, Instituto de Histología and Embriología de Mendoza (IHEM), Universidad Nacional de Cuyo-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Mendoza, Argentina
| | - María Victoria Berberian
- Laboratorio de Transporte Intracelular, Instituto de Histología and Embriología de Mendoza (IHEM), Universidad Nacional de Cuyo-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Mendoza, Argentina
- Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Cuyo, Mendoza, Argentina
- Instituto Interdisciplinario de Ciencias Básicas, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Cuyo, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Mendoza, Argentina
| | - Marcela A. Michaut
- Laboratorio de Biología Reproductiva y Molecular, Instituto de Histología y Embriología de Mendoza (IHEM), Universidad Nacional de Cuyo-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Mendoza, Argentina
- Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Cuyo, Mendoza, Argentina
| |
Collapse
|
2
|
Krivonogova AS, Bruter AV, Makutina VA, Okulova YD, Ilchuk LA, Kubekina MV, Khamatova AY, Egorova TV, Mymrin VS, Silaeva YY, Deykin AV, Filatov MA, Isaeva AG. AAV infection of bovine embryos: Novel, simple and effective tool for genome editing. Theriogenology 2022; 193:77-86. [PMID: 36156427 DOI: 10.1016/j.theriogenology.2022.09.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 09/07/2022] [Accepted: 09/08/2022] [Indexed: 11/28/2022]
Abstract
Adeno-associated viruses (AAV) are widely used in the field of genetically modified organism production. In this work, transduction of bovine embryos by AAV was selected as a potential approach to perform genetic modifications: we have used recombinant AAV to produce GFP-positive bovine embryos. Five different AAV serotypes were used to evaluate their ability to deliver genetic material into the bovine embryos. AAV9 serotype demonstrated minimal effectiveness (38,10%) as the genetic material transfer tool. Four other serotypes of AAVs (AAV1, AAV2, AAV6 and AAV-DJ) showed very close transduction efficiency (52,94-58,33%). CD209 is a C-type lectin receptor which is presented on the surface of macrophages and dendritic cells. CD209 recognizes a broad range of pathogens in a rather nonspecific manner. Production of CD209 knock-out is relevant for better understanding of infection mechanisms. Potentially, production of such knock-out may enable animals to become resistant to various infections. We have analyzed DNA samples from 22 blastocysts obtained after in vitro culture of zygotes subjected to recombinant AAV action. We have detected that 3 of 22 analyzed blastocysts contained mosaic CD209 frameshifts. Therefore, we have demonstrated proof of principle that application of AAV as a genome editing tool is an effective method for obtaining genetically modified cattle embryos.
Collapse
Affiliation(s)
- Anna S Krivonogova
- Ural Federal Agrarian Research Center of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Alexandra V Bruter
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Institute of Gene Biology, Russian Academy of Sciences, Moscow, 119334, Russia
| | - Valeria A Makutina
- Ural Federal Agrarian Research Center of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Yuliya D Okulova
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Institute of Gene Biology, Russian Academy of Sciences, Moscow, 119334, Russia
| | - Leonid A Ilchuk
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Institute of Gene Biology, Russian Academy of Sciences, Moscow, 119334, Russia
| | - Marina V Kubekina
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Institute of Gene Biology, Russian Academy of Sciences, Moscow, 119334, Russia
| | - Alexandra Yu Khamatova
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Institute of Gene Biology, Russian Academy of Sciences, Moscow, 119334, Russia
| | - Tatiana V Egorova
- Laboratory of Modeling and Gene Therapy of Hereditary Diseases, Institute of Gene Biology, Russian Academy of Sciences, Moscow, 119334, Russia; Marlin Biotech LLC, Sochi, 354340, Russia
| | - Vladimir S Mymrin
- Ural Federal Agrarian Research Center of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Yuliya Yu Silaeva
- Core Facility Center, Institute of Gene Biology, Russian Academy of Sciences, Moscow, 119334, Russia
| | - Alexey V Deykin
- Ural Federal Agrarian Research Center of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Maxim A Filatov
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Institute of Gene Biology, Russian Academy of Sciences, Moscow, 119334, Russia.
| | - Albina G Isaeva
- Ural Federal Agrarian Research Center of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| |
Collapse
|
3
|
Poro-viscoelastic behaviour of the zona pellucida: Impact of three-dimensional modelling on material characterisation. J Mech Behav Biomed Mater 2022; 131:105211. [DOI: 10.1016/j.jmbbm.2022.105211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Revised: 03/07/2022] [Accepted: 03/26/2022] [Indexed: 11/21/2022]
|
4
|
Stracuzzi A, Dittmann J, Böl M, Ehret AE. Visco- and poroelastic contributions of the zona pellucida to the mechanical response of oocytes. Biomech Model Mechanobiol 2021; 20:751-765. [PMID: 33533999 PMCID: PMC7979617 DOI: 10.1007/s10237-020-01414-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 12/19/2020] [Indexed: 12/22/2022]
Abstract
Probing mechanical properties of cells has been identified as a means to infer information on their current state, e.g. with respect to diseases or differentiation. Oocytes have gained particular interest, since mechanical parameters are considered potential indicators of the success of in vitro fertilisation procedures. Established tests provide the structural response of the oocyte resulting from the material properties of the cell's components and their disposition. Based on dedicated experiments and numerical simulations, we here provide novel insights on the origin of this response. In particular, polarised light microscopy is used to characterise the anisotropy of the zona pellucida, the outermost layer of the oocyte composed of glycoproteins. This information is combined with data on volumetric changes and the force measured in relaxation/cyclic, compression/indentation experiments to calibrate a multi-phasic hyper-viscoelastic model through inverse finite element analysis. These simulations capture the oocyte's overall force response, the distinct volume changes observed in the zona pellucida, and the structural alterations interpreted as a realignment of the glycoproteins with applied load. The analysis reveals the presence of two distinct timescales, roughly separated by three orders of magnitude, and associated with a rapid outflow of fluid across the external boundaries and a long-term, progressive relaxation of the glycoproteins, respectively. The new results allow breaking the overall response down into the contributions from fluid transport and the mechanical properties of the zona pellucida and ooplasm. In addition to the gain in fundamental knowledge, the outcome of this study may therefore serve an improved interpretation of the data obtained with current methods for mechanical oocyte characterisation.
Collapse
Affiliation(s)
- Alberto Stracuzzi
- Institute for Mechanical Systems, ETH Zurich, 8092, Zurich, Switzerland
- Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600, Dübendorf, Switzerland
| | - Johannes Dittmann
- Institute of Mechanics and Adaptronics, Technische Universität Braunschweig, Braunschweig, 38106, Germany
| | - Markus Böl
- Institute of Mechanics and Adaptronics, Technische Universität Braunschweig, Braunschweig, 38106, Germany.
| | - Alexander E Ehret
- Institute for Mechanical Systems, ETH Zurich, 8092, Zurich, Switzerland.
- Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600, Dübendorf, Switzerland.
| |
Collapse
|
5
|
Kim HJ, Lee S, Lee JH, Park JM, Hong SJ, Lee OH, Park JS, Choi Y, Park KH. TRITC-Loaded PLGA Nanoparticles as Drug Delivery Carriers in Mouse Oocytes and Embryos. ACS APPLIED MATERIALS & INTERFACES 2021; 13:5975-5988. [PMID: 33502166 DOI: 10.1021/acsami.0c19792] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The structural layers around oocytes make it difficult to deliver drugs aimed at treating infertility. In this study, we sought to identify nanoparticles (NPs) that could easily pass through zona pellucida (ZP), a special layer around oocytes, for use as a drug delivery carrier. Three types of NPs were tested: quantum dot NPs, PE-polyethylene glycol (PEG)-loaded poly(lactic-co-glycolic acid) (PLGA) NPs (PEG/PL), and tetramethylrhodamine-loaded PLGA NPs (TRNPs). When mouse oocytes were treated with NPs, only TRNPs could fully pass through the ZP and cell membrane. To assess the effects of TRNPs on fertility and potential nanotoxicity, we performed mRNA sequencing analysis to confirm their genetic safety. We established a system to successfully internalize TRNPs into oocytes. The genetic stability and normal development of TRNP-treated oocytes and embryos were confirmed. These results imply that TRNPs can be used as a drug delivery carrier applicable to germ cells.
Collapse
Affiliation(s)
- Hye Jin Kim
- Department of Biomedical Science, College of Life Science, CHA University, 6F, CHA Biocomplex, Sampyeong-Dong, Bundang-gu, Seongnam-si 13488, Republic of Korea
| | - Sujin Lee
- Department of Biomedical Science, College of Life Science, CHA University, 6F, CHA Biocomplex, Sampyeong-Dong, Bundang-gu, Seongnam-si 13488, Republic of Korea
| | - Ju Hyun Lee
- Department of Biomedical Science, College of Life Science, CHA University, 6F, CHA Biocomplex, Sampyeong-Dong, Bundang-gu, Seongnam-si 13488, Republic of Korea
| | - Jong Min Park
- Department of Biomedical Science, College of Life Science, CHA University, 6F, CHA Biocomplex, Sampyeong-Dong, Bundang-gu, Seongnam-si 13488, Republic of Korea
| | - Suk Jun Hong
- Department of Biomedical Science, College of Life Science, CHA University, 6F, CHA Biocomplex, Sampyeong-Dong, Bundang-gu, Seongnam-si 13488, Republic of Korea
| | - Ok-Hee Lee
- Department of Biomedical Science, College of Life Science, CHA University, 6F, CHA Biocomplex, Sampyeong-Dong, Bundang-gu, Seongnam-si 13488, Republic of Korea
| | - Ji Sun Park
- Department of Biomedical Science, College of Life Science, CHA University, 6F, CHA Biocomplex, Sampyeong-Dong, Bundang-gu, Seongnam-si 13488, Republic of Korea
| | - Youngsok Choi
- Department of Stem Cell and Regenerative Biotechnology, Konkuk University, Seoul 05029, Republic of Korea
| | - Keun-Hong Park
- Department of Biomedical Science, College of Life Science, CHA University, 6F, CHA Biocomplex, Sampyeong-Dong, Bundang-gu, Seongnam-si 13488, Republic of Korea
| |
Collapse
|
6
|
Báez F, Camargo Á, Reyes AL, Márquez A, Paula-Lopes F, Viñoles C. Time-dependent effects of heat shock on the zona pellucida ultrastructure and in vitro developmental competence of bovine oocytes. Reprod Biol 2019; 19:195-203. [PMID: 31208934 DOI: 10.1016/j.repbio.2019.06.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 05/28/2019] [Accepted: 06/06/2019] [Indexed: 11/17/2022]
Abstract
The aim of this study was to determine the effects of different exposure lenght to heat shock (HS) during in vitro maturation (IVM) on zona pellucida (ZP) ultrastructure and developmental competence of bovine oocytes. Cumulus-oocyte complexes (COCs) were matured in vitro (IVM) at 38.5 °C for 24 h (control group, CG), or incubated at 41 °C (HS) for 6 h (HS-6h), 12 h (HS-12h), 18 h (HS-18h), and 22h (HS-22h) followed by incubation at 38.5 °C to complete a full 24-h period of maturation. After IVM, oocytes were subjected to scanning electron microscopy (SEM) or in vitro fertilization and culture until the blastocyst stage. For heat-shocked oocytes, with exception of those in the HS-6h group, SEM examinations revealed that ZP surfaces were rough and characterized by a presence of spongy network. Oocytes from the HS-22h group displayed an increase in the number of pores, as well as a higher proportion of oocytes with amorphous ZPs. The proportion of oocytes that reached metaphase II (MII) stage decreased in all HS groups, regardless of the duration of exposure to 41 °C. These results provide evidence that HS during IVM for 12-22 h reduces the developmental competence of bovine oocytes, increasing the percentage of oocytes with abnormal chromosomal organization, and reducing fertilization and blastocysts formation rate. The effects of HS were more pronounced for the 22-h exposure group. The damage induced by HS on oocyte function clearly increased upon exposure to elevated temperature.
Collapse
Affiliation(s)
- Francisco Báez
- Instituto Superior de la Carne, Sede Tacuarembó, UdelaR, Ruta 5, km 386, Tacuarembó, Uruguay.
| | - Álvaro Camargo
- Instituto Superior de Estudios Forestales, Sede Tacuarembó, UdelaR, Ruta 5, km 386, Tacuarembó, Uruguay
| | - Ana Laura Reyes
- Servicio de Microscopía Electrónica, Unidad de Microscopía Electrónica de Barrido, Facultad de Ciencias, UdelaR, Iguá 4225 Esq. Mataojo, Montevideo, Uruguay
| | - Alejandro Márquez
- Servicio de Microscopía Electrónica, Unidad de Microscopía Electrónica de Barrido, Facultad de Ciencias, UdelaR, Iguá 4225 Esq. Mataojo, Montevideo, Uruguay
| | - Fabíola Paula-Lopes
- Departamento de Ciências Biológicas, Universidade Federal de São Paulo, Rua Prof. Artur Riedel, 275 Jardim Eldorado, 09972-270, Diadema, SP, Brazil
| | - Carolina Viñoles
- Centro de Salud Reproductiva de Rumiantes en Sistemas Agroforestales, Casa de la Universidad de Cerro Largo, UdelaR, Ruta 26, km 408, Cerro Largo, Uruguay
| |
Collapse
|
7
|
Bagheri H, Friedman H, Shao H, Chong Y, Lo CA, Emran F, Kays I, Yang XJ, Cooper E, Chen BE, Siminovitch K, Peterson A. TIE: A Method to Electroporate Long DNA Templates into Preimplantation Embryos for CRISPR-Cas9 Gene Editing. CRISPR J 2018; 1:223-229. [PMID: 31021258 PMCID: PMC6636866 DOI: 10.1089/crispr.2017.0020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Precise genome editing using CRISPR typically requires delivery of guide RNAs, Cas9 endonuclease, and DNA repair templates. Both microinjection and electroporation effectively deliver these components into mouse zygotes provided the DNA template is an oligonucleotide of only a few hundred base pairs. However, electroporation completely fails with longer double-stranded DNAs leaving microinjection as the only delivery option. Here, we overcome this limitation by first injecting all CRISPR components, including long plasmid-sized DNA templates, into the sub-zona pellucida space. There they are retained, supporting subsequent electroporation. We show that this simple and well-tolerated method achieves intracellular reagent concentrations sufficient to effect precise gene edits.
Collapse
Affiliation(s)
- Hooman Bagheri
- 1 Laboratory of Developmental Biology, McGill University , Montreal, Quebec, Canada.,2 Department of Human Genetics, McGill University , Montreal, Quebec, Canada
| | - Hana Friedman
- 1 Laboratory of Developmental Biology, McGill University , Montreal, Quebec, Canada.,2 Department of Human Genetics, McGill University , Montreal, Quebec, Canada.,3 Department of Neurology and Neurosurgery, McGill University , Montreal, Quebec, Canada.,4 Department of Oncology, McGill University , Montreal, Quebec, Canada
| | - Harry Shao
- 1 Laboratory of Developmental Biology, McGill University , Montreal, Quebec, Canada
| | - Yumaine Chong
- 5 Department of Physiology, McGill University , Montreal, Quebec, Canada
| | - Chiu-An Lo
- 6 Centre for Research in Neuroscience, Research Institute of the McGill University Health Centre , Montreal, Quebec, Canada
| | - Farida Emran
- 6 Centre for Research in Neuroscience, Research Institute of the McGill University Health Centre , Montreal, Quebec, Canada
| | - Ibrahim Kays
- 6 Centre for Research in Neuroscience, Research Institute of the McGill University Health Centre , Montreal, Quebec, Canada
| | - Xiang-Jiao Yang
- 7 Department of Biochemistry, McGill University , Montreal, Quebec, Canada
| | - Ellis Cooper
- 5 Department of Physiology, McGill University , Montreal, Quebec, Canada
| | - Brian E Chen
- 6 Centre for Research in Neuroscience, Research Institute of the McGill University Health Centre , Montreal, Quebec, Canada
| | - Katherine Siminovitch
- 8 Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital , Toronto, Ontario, Canada
| | - Alan Peterson
- 1 Laboratory of Developmental Biology, McGill University , Montreal, Quebec, Canada.,2 Department of Human Genetics, McGill University , Montreal, Quebec, Canada.,3 Department of Neurology and Neurosurgery, McGill University , Montreal, Quebec, Canada.,4 Department of Oncology, McGill University , Montreal, Quebec, Canada
| |
Collapse
|
8
|
Dittmann J, Dietzel A, Böl M. Mechanical characterisation of oocytes - The influence of sample geometry on parameter identification. J Mech Behav Biomed Mater 2018; 77:764-775. [DOI: 10.1016/j.jmbbm.2017.07.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 07/07/2017] [Accepted: 07/25/2017] [Indexed: 01/24/2023]
|
9
|
Shafei RA, Syrkasheva AG, Romanov AY, Makarova NP, Dolgushina NV, Semenova ML. Blastocyst hatching in humans. Russ J Dev Biol 2017. [DOI: 10.1134/s1062360417010106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
10
|
Abstract
Fertilization is the culminating event of sexual reproduction, which involves the union of the sperm and egg to form a single, genetically distinct organism. Despite the fundamental role of fertilization, the basic mechanisms involved have remained poorly understood. However, these mechanisms must involve an ordered schedule of cellular recognition events between the sperm and egg to ensure successful fusion. In this article, we review recent progress in our molecular understanding of mammalian fertilization, highlighting the areas in which genetic approaches have been particularly informative and focusing especially on the roles of secreted and cell surface proteins, expressed in a sex-specific manner, that mediate sperm-egg interactions. We discuss how the sperm interacts with the female reproductive tract, zona pellucida, and the oolemma. Finally, we review recent progress made in elucidating the mechanisms that reduce polyspermy and ensure that eggs normally fuse with only a single sperm.
Collapse
Affiliation(s)
- Enrica Bianchi
- Cell Surface Signalling Laboratory, Wellcome Trust Sanger Institute, Cambridge CB10 1SA, United Kingdom; ,
| | - Gavin J Wright
- Cell Surface Signalling Laboratory, Wellcome Trust Sanger Institute, Cambridge CB10 1SA, United Kingdom; ,
| |
Collapse
|
11
|
Swain JE, Carrell D, Cobo A, Meseguer M, Rubio C, Smith GD. Optimizing the culture environment and embryo manipulation to help maintain embryo developmental potential. Fertil Steril 2016; 105:571-587. [PMID: 26851765 DOI: 10.1016/j.fertnstert.2016.01.035] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 01/25/2016] [Accepted: 01/26/2016] [Indexed: 12/30/2022]
Abstract
With increased use of comprehensive chromosome screening (CCS), the question remains as to why some practices do not experience the same high levels of clinical success after implementation of the approach. Indeed, the debate surrounding the efficacy and usefulness of blastocyst biopsy and CCS continues. Importantly, several variables impact the success of an assisted reproductive technology cycle. Transfer of a euploid embryo is but one factor in an intricate system that requires numerous steps to occur successfully. Certainly, the culture environment and the manipulations of the embryo during its time in the laboratory can impact its reproductive potential. Environmental stressors ranging from culture media to culture conditions and even culture platform can impact biochemical, metabolic, and epigenetic patterns that can affect the developing cell independent of chromosome number. Furthermore, accompanying procedures, such as biopsy and vitrification, are complex and, when performed improperly, can negatively impact embryo quality. These are areas that likely still carry room for improvement within the IVF laboratory.
Collapse
Affiliation(s)
| | - Doug Carrell
- Department of Surgery (Urology) and Human Genetics, University of Utah School of Medicine, Salt Lake City, Utah
| | - Ana Cobo
- Instituto Valenciano de Infertilidad, Valencia, Spain
| | | | | | - Gary D Smith
- Department of Molecular and Integrative Physiology, Ob/Gyn, Urology, University of Michigan, Ann Arbor, Michigan
| |
Collapse
|