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McLennan HJ, Heinrich SL, Inge MP, Wallace SJ, Blanch AJ, Hails L, O'Connor JP, Waite MB, McIlfatrick S, Nottle MB, Dunning KR, Gardner DK, Thompson JG, Love AK. A micro-fabricated device (microICSI) improves porcine blastocyst development and procedural efficiency for both porcine intracytoplasmic sperm injection and human microinjection. J Assist Reprod Genet 2024; 41:297-309. [PMID: 38236552 PMCID: PMC10894805 DOI: 10.1007/s10815-023-03018-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 12/21/2023] [Indexed: 01/19/2024] Open
Abstract
PURPOSE Intracytoplasmic sperm injection (ICSI) imparts physical stress on the oolemma of the oocyte and remains among the most technically demanding skills to master, with success rates related to experience and expertise. ICSI is also time-consuming and requires workflow management in the laboratory. This study presents a device designed to reduce the pressure on the oocyte during injection and investigates if this improves embryo development in a porcine model. The impact of this device on laboratory workflow was also assessed. METHODS Porcine oocytes were matured in vitro and injected with porcine sperm by conventional ICSI (C-ICSI) or with microICSI, an ICSI dish that supports up to 20 oocytes housed individually in microwells created through microfabrication. Data collected included set-up time, time to align the polar body, time to perform the injection, the number of hand adjustments between controllers, and degree of invagination at injection. Developmental parameters measured included cleavage and day 6 blastocyst rates. Blastocysts were differentially stained to assess cell numbers of the inner cell mass and trophectoderm. A pilot study with human donated MII oocytes injected with beads was also performed. RESULTS A significant increase in porcine blastocyst rate for microICSI compared to C-ICSI was observed, while cleavage rates and blastocyst cell numbers were comparable between treatments. Procedural efficiency of microinjection was significantly improved with microICSI compared to C-ICSI in both species. CONCLUSION The microICSI device demonstrated significant developmental and procedural benefits for porcine ICSI. A pilot study suggests human ICSI should benefit equally.
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Affiliation(s)
- Hanna J McLennan
- Fertilis Pty Ltd, Frome Road, Helen Mayo South, The University of Adelaide, Adelaide, SA, 5005, Australia.
| | - Shauna L Heinrich
- Fertilis Pty Ltd, Frome Road, Helen Mayo South, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Megan P Inge
- Fertilis Pty Ltd, Frome Road, Helen Mayo South, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Samuel J Wallace
- Virtual Ark Pty Ltd, 73 Woolnough Road, Semaphore, SA, 5019, Australia
| | - Adam J Blanch
- Fertilis Pty Ltd, Frome Road, Helen Mayo South, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Llewelyn Hails
- Fertilis Pty Ltd, Frome Road, Helen Mayo South, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - John P O'Connor
- Fertilis Pty Ltd, Frome Road, Helen Mayo South, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Michael B Waite
- Fertilis Pty Ltd, Frome Road, Helen Mayo South, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Stephen McIlfatrick
- School of Biomedicine, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, SA, 5005, Australia
- Robinson Research Institute, Adelaide Medical School, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Mark B Nottle
- School of Biomedicine, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, SA, 5005, Australia
- Robinson Research Institute, Adelaide Medical School, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Kylie R Dunning
- School of Biomedicine, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, SA, 5005, Australia
- Robinson Research Institute, Adelaide Medical School, The University of Adelaide, Adelaide, SA, 5005, Australia
- Australian Research Council Centre of Excellence for Nanoscale BioPhotonics, The University of Adelaide, Adelaide, SA, 5005, Australia
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - David K Gardner
- Fertilis Pty Ltd, Frome Road, Helen Mayo South, The University of Adelaide, Adelaide, SA, 5005, Australia
- Melbourne IVF, East Melbourne, VIC, 3002, Australia
- School of BioSciences, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Jeremy G Thompson
- Fertilis Pty Ltd, Frome Road, Helen Mayo South, The University of Adelaide, Adelaide, SA, 5005, Australia.
- Robinson Research Institute, Adelaide Medical School, The University of Adelaide, Adelaide, SA, 5005, Australia.
- ART Lab Solutions Pty Ltd, 10 Pulteney Street, Adelaide, SA, 5005, Australia.
| | - Allison K Love
- Fertilis Pty Ltd, Frome Road, Helen Mayo South, The University of Adelaide, Adelaide, SA, 5005, Australia
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