<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The aim of this study was to evaluate the effect of high hydrostatic pressure (HHP) on the <italic>in vitro</italic> developmental abilities of nano-transfected rabbit zygotes, their transfection efficiency, and the molecular quality of the blastocysts generated. This quality was assessed by estimating the quantitative profiles of <italic>Oct4, Casp7</italic>, and <italic>Bcl2</italic> mRNA transcripts. The nano-transfection efficiencies of zygotes that had been pre-treated with either 20 MPa or 40 MPa of HHP (13.5% and 13.7%, respectively) were insignificantly lower than those found in zygotes not exposed to HHP prior to their nano-transfection (20.1%; P≥0.05). Moreover, applying HHP treatment with the parameters of 20 MPa and 40 MPa followed by the nano-transfection of zygotes brought about an insignificant decrease in the rates of embryos at the blastocyst stage (30.4% and 23.0%, respectively) as compared to the control group of nano-transfected zygotes (40.4%; P≥0.05). Furthermore, analyzing the transcriptional activity of <italic>Oct4, Bcl2</italic>, and <italic>Casp7</italic> genes revealed that HHP enhances the relative abundance (RA) of all mRNA transcripts in blastocysts derived from non-transfected rabbit zygotes. In turn, the augmented RAs found in the pro-apoptotic <italic>Casp7</italic> and anti-apoptotic <italic>Bcl-2</italic> transcripts confirmed the onset and progression of programmed cell death in blastocysts developed from nano-transfected zygotes that had undergone HHP pre-treatment. The conceptualization based not only on a novel nano-transfection approach used to genetically modify <italic>in vivo</italic>-fertilized rabbit zygotes but also on their HHP pre-treatment is elaborated here for the first time, with an emphasis on further investigations aimed at producing transgenic rabbit and other mammalian species embryos by somatic cell cloning.</p>
</abstract>

The aim of this study was to evaluate the effect of high hydrostatic pressure (HHP) on the in vitro developmental abilities of nano-transfected rabbit zygotes, their transfection efficiency, and the molecular quality of the blastocysts generated. This quality was assessed by estimating the quantitative profiles of Oct4, Casp7, and Bcl2 mRNA transcripts. The nano-transfection efficiencies of zygotes that had been pre-treated with either 20 MPa or 40 MPa of HHP (13.5% and 13.7%, respectively) were insignificantly lower than those found in zygotes not exposed to HHP prior to their nano-transfection (20.1%; P≥0.05). Moreover, applying HHP treatment with the parameters of 20 MPa and 40 MPa followed by the nano-transfection of zygotes brought about an insignificant decrease in the rates of embryos at the blastocyst stage (30.4% and 23.0%, respectively) as compared to the control group of nano-transfected zygotes (40.4%; P≥0.05). Furthermore, analyzing the transcriptional activity of Oct4, Bcl2, and Casp7 genes revealed that HHP enhances the relative abundance (RA) of all mRNA transcripts in blastocysts derived from non-transfected rabbit zygotes. In turn, the augmented RAs found in the pro-apoptotic Casp7 and anti-apoptotic Bcl-2 transcripts confirmed the onset and progression of programmed cell death in blastocysts developed from nano-transfected zygotes that had undergone HHP pre-treatment. The conceptualization based not only on a novel nano-transfection approach used to genetically modify in vivo-fertilized rabbit zygotes but also on their HHP pre-treatment is elaborated here for the first time, with an emphasis on further investigations aimed at producing transgenic rabbit and other mammalian species embryos by somatic cell cloning.

Effect of high hydrostatic pressure on the <italic>in vitro</italic> development and molecular quality of transgenic rabbit embryos derived from nano-transfected zygotes

Department of Reproductive Biotechnology and Cryoconservation

Annals of Animal Science

This work is licensed under the Creative Commons Attribution 4.0 International License.

Effect of high hydrostatic pressure on the  development and molecular quality of transgenic rabbit embryos derived from nano-transfected zygotes

The aim of this study was to evaluate the effect of high hydrostatic pressure (HHP) on the in vitro developmental abilities of nano-transfected rabbit zygotes,...

Effect of high hydrostatic pressure on the in vitro development and molecular quality of transgenic rabbit embryos derived from nano-transfected zygotes

Published Online: Jul 19, 2022

Page range: 931 - 943

Received: Jul 28, 2021

Accepted: Jan 19, 2022

DOI: https://doi.org/10.2478/aoas-2022-0016

Keywords
rabbit, nano-transfection, high hydrostatic pressure, -fertilized zygote, development, transcriptional activity

© 2022 Natalia Dzięgiel et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Effect of high hydrostatic pressure on the in vitro development and molecular quality of transgenic rabbit embryos derived from nano-transfected zygotes

Published Online: Jul 19, 2022

Page range: 931 - 943

Received: Jul 28, 2021

Accepted: Jan 19, 2022

DOI: https://doi.org/10.2478/aoas-2022-0016

Keywordsrabbit, nano-transfection, high hydrostatic pressure, -fertilized zygote, development, transcriptional activity

© 2022 Natalia Dzięgiel et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
rabbit, nano-transfection, high hydrostatic pressure, -fertilized zygote, development, transcriptional activity