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Mizuno K, Okitsu O, Goto M, Kusuhara A, Kusuhara K. Polyvinylpyrrolidone can prevent oolemma lysis caused by abnormal rupture of the plasma membrane in Piezo-ICSI. Hum Cell 2024; 37:951-958. [PMID: 38615310 DOI: 10.1007/s13577-024-01061-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 03/24/2024] [Indexed: 04/15/2024]
Abstract
The aim of this study was to investigate whether it is possible to prevent oolemma lysis after Piezo-assisted intracytoplasmic sperm injection (Piezo-ICSI) caused by abnormal membrane rupture. A total of 489 mature oocytes were obtained from 85 patients who underwent Piezo-ICSI in an infertility clinic. Inseminated oocytes were classified into the following two groups: normal rupture and abnormal rupture, and a portion of abnormally ruptured oocytes was randomly exposed to 7% PVP solution. Normal fertilization rate, degeneration rate, proportion of high-quality embryos on day 3, blastocyst formation, and morphologically high-quality blastocysts were compared. Abnormal rupture was defined as cytoplasmic membrane rupture before piezo pulse driving. Among the abnormal rupture groups, the normal fertilization and degeneration rates were compared between the high-stretched (ruptured at ≥ 50% during oocyte membrane stretching) and low-stretched (< 50% position) oocytes.The degeneration rate was significantly higher in abnormally ruptured oocytes than in normally ruptures oocytes (14.3% vs 1.3%, p < 0.001), and there was no significant difference in embryonic development after fertilization. PVP treatment immediately after oolemma rupture significantly decreased the degeneration rate (6.0% vs 19.7%, p = 0.031) and increased the normal fertilization rate. Similarly, there were no significant differences in the developmental potential. Furthermore, pregnancy outcome data showed no significant differences in pregnancy and live birth rates. The degeneration rate was reduced by treating low-stretched oocytes with PVP.Exposure to polyvinylpyrrolidone (PVP) immediately after abnormal membrane rupture represents an effective strategy to prevent oocyte degeneration. This is the first study to propose a strategy for the prevention of oocyte degeneration in Piezo-ICSI. These findings are expected to reduce the oocyte degeneration rate and increase normal fertilization rate as well as assist patients who can only acquire oocytes with weak plasma membranes.
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Affiliation(s)
| | | | - Mako Goto
- Kusuhara Women's Clinic, Chuo-Ku, Tokyo, Japan
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Thompson JG, McLennan HJ, Heinrich SL, Inge MP, Gardner DK, Harvey AJ. A brief history of technical developments in intracytoplasmic sperm injection (ICSI). Dedicated to the memory of J.M. Cummins. Reprod Fertil Dev 2024; 36:RD24047. [PMID: 38902908 DOI: 10.1071/rd24047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Accepted: 05/29/2024] [Indexed: 06/22/2024] Open
Abstract
Intracytoplasmic sperm injection (ICSI) is an assisted reproductive technology for treatment of severe male infertility introduced into clinical practice in 1992. This review provides a brief history of the development of ICSI by acknowledging major developments in the field. The review addresses key developments in pre-clinical and early studies, how ICSI compares with in vitro fertilisation, long-term consequences, how the mechanistic approach to ICSI has changed in both manual and semi-automated approaches, and how sperm selection procedures are integrated into ICSI. From the beginnings using animal models in the 1960-1970s, the development of ICSI is a remarkable and transformative success story. Indeed, its broad use (70% of cycles globally) exceeds the need required for treating infertile males, and this remains a controversial issue. There remain questions around the long-term health impacts of ICSI. Furthermore, advances in automation of the ICSI procedure are occurring. An estimated 6million children have been born from the ICSI procedure. With further automation of sperm selection technologies, coupled with automation of the injection procedure, it is likely that the proportion of children born from ICSI will further increase.
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Affiliation(s)
- J G Thompson
- Fertilis Pty Ltd, Frome Road, Helen Mayo South, The University of Adelaide, Adelaide, SA 5005, Australia; and Robinson Research Institute, Adelaide Medical School, The University of Adelaide, Adelaide, SA 5005, Australia; and ART Lab Solutions Pty Ltd, 10 Pulteney Street, Adelaide, SA 5005, Australia
| | - H J McLennan
- Fertilis Pty Ltd, Frome Road, Helen Mayo South, The University of Adelaide, Adelaide, SA 5005, Australia
| | - S L Heinrich
- Fertilis Pty Ltd, Frome Road, Helen Mayo South, The University of Adelaide, Adelaide, SA 5005, Australia
| | - M P Inge
- Fertilis Pty Ltd, Frome Road, Helen Mayo South, The University of Adelaide, Adelaide, SA 5005, Australia
| | - D K Gardner
- Melbourne IVF, East Melbourne, Vic 3002, Australia; and School of BioSciences, University of Melbourne, Parkville, Vic 3010, Australia
| | - A J Harvey
- Melbourne IVF, East Melbourne, Vic 3002, Australia; and School of BioSciences, University of Melbourne, Parkville, Vic 3010, Australia
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Engmann L, Hallisey S, Bartolucci A. "Walking on eggshells": will PIEZO-intracytoplasmic sperm injection emerge as a new standard for penetrating the PIEZona pellucida? Fertil Steril 2024; 121:962-963. [PMID: 38616034 DOI: 10.1016/j.fertnstert.2024.04.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Accepted: 04/08/2024] [Indexed: 04/16/2024]
Affiliation(s)
- Lawrence Engmann
- The Center for Advanced Reproductive Services, Farmington, Connecticut; and Division of Reproductive Endocrinology and Infertility, University of Connecticut School of Medicine, Farmington, Connecticut
| | - Stephanie Hallisey
- The Center for Advanced Reproductive Services, Farmington, Connecticut; and Division of Reproductive Endocrinology and Infertility, University of Connecticut School of Medicine, Farmington, Connecticut
| | - Alison Bartolucci
- The Center for Advanced Reproductive Services, Farmington, Connecticut; and Division of Reproductive Endocrinology and Infertility, University of Connecticut School of Medicine, Farmington, Connecticut
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Zander-Fox D, Green M, Watson K, Turner R, Bakos HW, Foo J, Pacella-Ince L, Caddy M, McPherson NO, Rombauts L. Improved fertilization, degeneration, and embryo quality rates with PIEZO-intracytoplasmic sperm injection compared with conventional intracytoplasmic sperm injection: a sibling oocyte split multicenter trial. Fertil Steril 2024; 121:971-981. [PMID: 38272382 DOI: 10.1016/j.fertnstert.2024.01.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 12/20/2023] [Accepted: 01/17/2024] [Indexed: 01/27/2024]
Abstract
OBJECTIVE To investigate whether PIEZO-intracytoplasmic sperm injection (PIEZO-ICSI) increases the fertilization rate, decreases the degeneration rate, and increases the utilization rate per oocyte injected compared with conventional intracytoplasmic sperm injection (ICSI). DESIGN Sibling oocyte split multicenter trial. SETTING Fertility clinics. PATIENTS Women with a diagnosis of infertility who used ICSI as their method of insemination and had ≥6 mature oocytes for injection. INTERVENTIONS Participants had their mature oocyte cohort divided, where half were injected using conventional ICSI and the other half were injected using PIEZO-ICSI. For patients with an uneven oocyte number, the extra oocyte was injected using conventional ICSI. The injection technique used first was also randomized to ensure that there was no bias due to order of injection. MAIN OUTCOME MEASURE The primary outcome measure was the fertilization rate after injection. RESULTS A total of 108 patients underwent a sibling split use of conventional ICSI and PIEZO-ICSI. The fertilization rate was 71.6% in PIEZO-ICSI, which significantly increased compared with that in conventional ICSI 65.6%. In addition, the oocyte degeneration rate decreased in PIEZO-ICSI compared with that in conventional ICSI (6.3% vs. 12.1% respectively), and the blastocyst quality increased, as measured by the number of grade A and B quality blastocysts present on day 5 of development (33.3% vs. 27.5%). No significant differences in the aneuploidy or utilization rate, clinical pregnancy, or live birth outcome after single embryo transfer were noted between the two injection techniques. CONCLUSIONS This trial supports the possibility that PIEZO-ICSI increases the fertilization rates, decreases the oocyte degeneration rates, and increases the blastocyst quality compared with conventional ICSI; however, it does not appear to influence the clinical pregnancy or live birth rate per transfer. CLINICIAN TRIAL REGISTRATION NUMBER Australian and New Zealand Clinical Trial Registry ACTRN12620000407998.
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Affiliation(s)
- Deirdre Zander-Fox
- Monash IVF Group, Melbourne, Victoria, Australia; School of Biomedicine, University of Adelaide, Adelaide, South Australia, Australia; Biomedicine Discovery Institute, Monash University, Melbourne, Victoria, Australia.
| | - Mark Green
- Monash IVF Group, Melbourne, Victoria, Australia; School of BioSciences, University of Melbourne, Melbourne, Victoria, Australia
| | - Kate Watson
- Monash IVF Group, Melbourne, Victoria, Australia
| | - Ross Turner
- Monash IVF Group, Melbourne, Victoria, Australia
| | - Hassan W Bakos
- Monash IVF Group, Melbourne, Victoria, Australia; School of Environmental and Life Sciences, College of Engineering, Science and Environment, University of Newcastle, Newcastle, New South Wales
| | - Jinny Foo
- Monash IVF Group, Melbourne, Victoria, Australia
| | - Leanne Pacella-Ince
- Monash IVF Group, Melbourne, Victoria, Australia; School of Biomedicine, University of Adelaide, Adelaide, South Australia, Australia
| | | | - Nicole O McPherson
- Monash IVF Group, Melbourne, Victoria, Australia; School of Biomedicine, University of Adelaide, Adelaide, South Australia, Australia; Freemasons Centre for Male Health and Wellbeing, University of Adelaide, Adelaide, South Australia, Australia
| | - Luk Rombauts
- Monash IVF Group, Melbourne, Victoria, Australia; Biomedicine Discovery Institute, Monash University, Melbourne, Victoria, Australia
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Shioya M, Okabe-Kinoshita M, Kobayashi T, Fujita M, Takahashi K. Human metaphase II oocytes with narrow perivitelline space have poor fertilization, developmental, and pregnancy potentials. J Assist Reprod Genet 2024; 41:1449-1458. [PMID: 38499932 PMCID: PMC11143139 DOI: 10.1007/s10815-024-03084-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 03/04/2024] [Indexed: 03/20/2024] Open
Abstract
PURPOSE To analyze the fertilization, developmental, and pregnancy potentials in oocytes with narrow perivitelline space. METHODS Perivitelline space (PVS) of oocytes was evaluated at the time of ICSI, and those without sufficient PVS were judged as oocytes with narrow PVS (NPVS oocytes), and those with sufficient PVS formation were judged as oocytes with non-narrow PVS (non-NPVS oocytes). The analysis included 634 NPVS oocytes from 278 cycles and 12,121 non-NPVS oocytes from 1698 cycles. The fertilization and developmental potentials of NPVS and non-NPVS oocytes were compared by calculating odds ratios using a mixed-effects logistic regression model. We also compared the embryo transfer outcomes of those used for single vitrified-warmed blastocyst transfer after developing into the blastocyst stage. RESULTS NPVS oocytes had higher odds ratios for degeneration (adjusted odds ratio [aOR], 1.555; 95% confidence interval [CI], 1.096-2.206; p = 0.0133) and 0PN (aOR, 1.387; 95% CI, 1.083-1.775; p = 0.0095), resulting in a lower 2PN rate (aOR, 0.761; 95% CI, 0.623-0.929; p = 0.0072). Even embryos with confirmed 2PN had lower odds ratios for cleavage (aOR, 0.501; 95% CI, 0.294-0.853; p = 0.0109) and blastocyst development (Gardner criteria; CC-AA) rates (aOR, 0.612; 95% CI, 0.476-0.788; p = 0.0001). Blastocysts developed from NPVS oocytes had significantly lower odds ratios for clinical pregnancy (aOR, 0.435; 95% CI, 0.222-0.854; p = 0.0156) than those developed from non-NPVS oocytes. CONCLUSIONS Oocytes with NPVS have low fertilization and developmental potential, as well as low likelihood of pregnancy.
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Affiliation(s)
- Masashi Shioya
- Takahashi Women's Clinic, 18-14-6F Shinmachi, Chuo-ku, Chiba, 260-0028, Japan.
- Department of Reproductive Medicine, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8670, Japan.
| | | | - Tatsuya Kobayashi
- Department of Reproductive Medicine, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8670, Japan
- Department of Regulatory Science, Fujita Health University, Haneda Innovation City Zone A, 1-1-4 Haneda Airport, Ota-ku, Tokyo, 144-0041, Japan
| | - Maki Fujita
- Takahashi Women's Clinic, 18-14-6F Shinmachi, Chuo-ku, Chiba, 260-0028, Japan
| | - Keiichi Takahashi
- Takahashi Women's Clinic, 18-14-6F Shinmachi, Chuo-ku, Chiba, 260-0028, Japan
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Morimoto T, Maekawa T, Mizuta S, Matsubayashi H, Takeuchi T, Hata Y, Ishikawa T. Identifying optimal puncture position by a real-time image analysis for Piezo-ICSI: a prospective randomized sibling oocyte study. Reprod Biomed Online 2024; 48:103735. [PMID: 38402676 DOI: 10.1016/j.rbmo.2023.103735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 11/13/2023] [Accepted: 11/17/2023] [Indexed: 02/27/2024]
Abstract
RESEARCH QUESTION Would the use of the intracytoplasmic sperm injection (ICSI) position detector (IPD) make it possible to identify the optimal puncture position on oolemma during Piezo-ICSI and reduce oocyte degeneration and unintentional membrane rupture (UMR)? DESIGN This sibling oocyte study included 917 inseminated oocytes from 113 infertile patients undergoing Piezo-ICSI. Oocytes were randomly divided into two groups: with or without IPD. The rates of UMR, degeneration, fertilization and embryonic development were compared between the two groups. As a secondary analysis, non-IPD oocytes were retrospectively assessed as appropriate or non-appropriate injection sites and analysed alongside prospective 'appropriate' injections. RESULTS The rates of UMR (7.0% versus 12.9%, P = 0.004) and degeneration (2.4% versus 6.1%, P < 0.01 = 0.008) were significantly lower in the IPD group than in the non-IPD group. No significant differences, however, were observed in the rates of fertilization (two pronuclei, 83.8% versus 78.9%), blastocyst formation (48.5% versus 48.8%) or good-quality blastocysts (22.5% versus 20.5%). Additionally, no significant differences were observed in the rates of pregnancy (29.4% versus 35.1%) or live births (26.5% versus 29.7%) in a single embryo transfer setting with or without IPD. Comparing all 'appropriate' injections with 'non-appropriate' injections also showed a significantly decreased rate of UMR and degeneration (both P ≤ 0.001). CONCLUSIONS The present study demonstrated that a real-time image analysis during Piezo-ICSI markedly reduced oocyte degeneration by avoiding areas associated with a high risk of UMR. Therefore, IPD may increase the number of embryos available for treatment.
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Affiliation(s)
- Takashi Morimoto
- Department of Reproductive Medicine, Reproduction Clinic Tokyo: Shiodome City Center 3F, 1-5-2 Higashi-shimbashi, Minato-ku, Tokyo, 105-7103 Japan..
| | - Tomohiro Maekawa
- Department of Reproductive Medicine, Reproduction Clinic Tokyo: Shiodome City Center 3F, 1-5-2 Higashi-shimbashi, Minato-ku, Tokyo, 105-7103 Japan
| | - Shimpei Mizuta
- Department of Reproductive Medicine, Reproduction Clinic Tokyo: Shiodome City Center 3F, 1-5-2 Higashi-shimbashi, Minato-ku, Tokyo, 105-7103 Japan
| | - Hidehiko Matsubayashi
- Department of Reproductive Medicine, Reproduction Clinic Tokyo: Shiodome City Center 3F, 1-5-2 Higashi-shimbashi, Minato-ku, Tokyo, 105-7103 Japan
| | - Takumi Takeuchi
- Department of Reproductive Medicine, Reproduction Clinic Tokyo: Shiodome City Center 3F, 1-5-2 Higashi-shimbashi, Minato-ku, Tokyo, 105-7103 Japan
| | - Yutaka Hata
- Graduate School of Information Science, University of Hyogo, 7-1-28, Minatojimaminami-cho, Chuo-ku, Kobe, 650-0047 Japan
| | - Tomomoto Ishikawa
- Department of Reproductive Medicine, Reproduction Clinic Tokyo: Shiodome City Center 3F, 1-5-2 Higashi-shimbashi, Minato-ku, Tokyo, 105-7103 Japan
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Asada Y. Evolution of intracytoplasmic sperm injection: From initial challenges to wider applications. Reprod Med Biol 2024; 23:e12582. [PMID: 38803410 PMCID: PMC11129627 DOI: 10.1002/rmb2.12582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 03/18/2024] [Accepted: 04/29/2024] [Indexed: 05/29/2024] Open
Abstract
Background In vitro fertilization (IVF) has revolutionized infertility treatment. Nevertheless, male infertility requires more effective solutions. In 1992, the first-ever case of human birth via intracytoplasmic sperm injection (ICSI) was reported. ICSI involves microscopically injecting a sperm into an ovum. Successful ICSI has become a reliable therapy for couples facing infertility, a significant milestone. However, it has also introduced various challenges. This study also delves into ethical dilemmas arising from widespread ICSI use. Methods This review traces the history of ICSI, presenting pioneering attempts, first successful attempts, and critical reports on account of the initial skepticism toward the technology. The review also focuses on chronological progress until ICSI was recognized as effective and became widely applied. Main findings The review reveals that ICSI, although transformative, presents challenges. Successes include addressing male infertility and aiding fertilization. However, concerns arise regarding optimal sperm and embryo selection, genetic mutations, and long-term health implications. Ethical considerations surrounding ICSI's broad applications also surface. Conclusions Despite its success and effectiveness, ICSI is still evolving as a therapeutic method. By comprehensively evaluating the historical progress and the current status of ICSI and exploring its future prospects, this study highlights the importance of ICSI in infertility treatment.
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Nakagawa K, Horikawa T, Orita Y, Yamashiro E, Watanabe H, Shirai A, Ogata S, Kataoka H, Kuroda K, Takamizawa S, Sugiyama R. Hyaluronan-enriched transfer medium (HETM) can improve the implantation rate in morphologically poor euploid blastocyst transfer. Arch Gynecol Obstet 2023; 308:611-619. [PMID: 37256356 PMCID: PMC10293447 DOI: 10.1007/s00404-023-07083-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 05/04/2023] [Indexed: 06/01/2023]
Abstract
PURPOSE Hyaluronan-enriched transfer medium (HETM) could improve the clinical pregnancy rate (CPR) for patients with repeated implantation failures (RIF). In contrast, there have been seldom reports addressing the potentially beneficial effects of HETM for morphologically poor blastocysts (MPBLs). Our study aimed to evaluate whether the use of HETM would improve the CPR for the patients who were transferred with euploid MPBLs. METHODS Patients who underwent single euploid blastocyst transfer between July 2020 and June 2022 were enrolled. We included only those blastocysts confirmed as euploid by PGT-A, and those blastocysts were transferred after thawing. The natural ovulatory cycle or hormone replacement cycle (HRC) protocol were used for endometrial preparation for frozen embryo transfer (FET). A total of 1,168 FET cycles were performed in the study period, including 954 cycles of morphologically good blastocysts (≥ 4BB in Gardner's classification), and 85 cycles of MPBLs, of which 47 were transferred using HETM in FET (the HETM group), and the remaining 38 were transferred with the medium without hyaluronan (the control group). We compared the CPR between these two groups. RESULTS The characteristics of patients were similar between the HETM and control groups. The CPR in the HETM group was significantly higher than the control group (47.4% and 21.5%, respectively, p = 0.019). The multiple logistic regression analysis found that the use of HETM was a predictive factor of positive pregnancy outcomes (OR = 5.08, 95% CI = 1.62-16.0, p = 0.019). CONCLUSION Our data suggests that HETM used in the euploid blastocyst transfer can improve the clinical pregnancy rates of morphologically poor blastocysts.
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Affiliation(s)
- Koji Nakagawa
- Center for Reproductive Medicine and Implantation Research, Sugiyama Clinic Shinjuku, 1-19-6, Nishi-Shinjuku, Shinjuku-Ku, Tokyo, 160-0023, Japan.
| | - Takashi Horikawa
- Center for Reproductive Medicine and Implantation Research, Sugiyama Clinic Shinjuku, 1-19-6, Nishi-Shinjuku, Shinjuku-Ku, Tokyo, 160-0023, Japan
| | - Yuji Orita
- Center for Reproductive Medicine and Implantation Research, Sugiyama Clinic Shinjuku, 1-19-6, Nishi-Shinjuku, Shinjuku-Ku, Tokyo, 160-0023, Japan
- Takeuchi Ladies Clinic, Aira City, Kagoshima, Japan
| | - Emi Yamashiro
- Center for Reproductive Medicine and Implantation Research, Sugiyama Clinic Shinjuku, 1-19-6, Nishi-Shinjuku, Shinjuku-Ku, Tokyo, 160-0023, Japan
| | - Hideaki Watanabe
- Center for Reproductive Medicine and Implantation Research, Sugiyama Clinic Shinjuku, 1-19-6, Nishi-Shinjuku, Shinjuku-Ku, Tokyo, 160-0023, Japan
| | - Asako Shirai
- Center for Reproductive Medicine and Implantation Research, Sugiyama Clinic Shinjuku, 1-19-6, Nishi-Shinjuku, Shinjuku-Ku, Tokyo, 160-0023, Japan
| | | | - Hisayo Kataoka
- Center for Reproductive Medicine and Implantation Research, Sugiyama Clinic Shinjuku, 1-19-6, Nishi-Shinjuku, Shinjuku-Ku, Tokyo, 160-0023, Japan
| | - Keiji Kuroda
- Center for Reproductive Medicine and Implantation Research, Sugiyama Clinic Shinjuku, 1-19-6, Nishi-Shinjuku, Shinjuku-Ku, Tokyo, 160-0023, Japan
| | - Satoru Takamizawa
- Center for Reproductive Medicine and Implantation Research, Sugiyama Clinic Shinjuku, 1-19-6, Nishi-Shinjuku, Shinjuku-Ku, Tokyo, 160-0023, Japan
| | - Rikikazu Sugiyama
- Center for Reproductive Medicine and Implantation Research, Sugiyama Clinic Shinjuku, 1-19-6, Nishi-Shinjuku, Shinjuku-Ku, Tokyo, 160-0023, Japan
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Watanabe S, Yoshikai K, Matsuda Y, Miyai S, Sawada Y, Kurahashi H, Sawada T. The effect of early irregular cell division of human embryos on blastocyst euploidy: considerations from the subsequent development of the blastomeres by direct or reverse cleavage. F&S SCIENCE 2023; 4:21-29. [PMID: 36410651 DOI: 10.1016/j.xfss.2022.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 11/11/2022] [Accepted: 11/15/2022] [Indexed: 11/21/2022]
Abstract
OBJECTIVE To investigate whether blastocysts that divide irregularly reduce subsequent blastocyst euploidy. DESIGN Retrospective study. SETTING Private clinic. PATIENT(S) A total of 122 blastocysts for which consent for disposal and research use was obtained. INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) Results of next-generation sequencing analysis of the blastocysts and whether blastomeres by normal or irregular divisions subsequently participated in blastocyst formation or not. RESULT(S) The embryos were classified according to their dynamics until the second cleavage. The blastocyst euploidy rates were 33.3% (19/57) in the normal cleavage (NC) group, 38.3% (18/47) in the direct cleavage (embryos with one cell dividing into 3 cells) (DC) group, and 72.2% (13/18) in the reverse cleavage (RC) (embryos with fused cells once divided) group. The rate of the RC group was significantly higher than that of the NC group. The blastocyst participation rate of the blastomeres were 95.6% in the NC group and 56.5% in that derived from DC of the first cleavage, and 91.7% in that of blastomeres derived from normal division of the second cleavage and 53.6% in that derived from DC of the second cleavage, both of which were significantly lower in the latter. In the RC group, the rates of fused and nonfused blastomeres were 62.1% and 87.5%, respectively, with no significant difference. CONCLUSION(S) The blastomeres generated by DC were often excluded from blastocyst formation, and we speculate that this is one reason why their division does not reduce blastocyst euploidy. The association between RC and euploidy of blastocysts merits further study.
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Affiliation(s)
| | | | | | - Shunsuke Miyai
- Institute for Comprehensive Medical Science, Fujita Health University, Toyoake, Japan
| | - Yuki Sawada
- Sawada Women's Clinic, Nagoya, Japan; Department of Obstetrics and Gynecology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Hiroki Kurahashi
- Institute for Comprehensive Medical Science, Fujita Health University, Toyoake, Japan
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Caddy M, Popkiss S, Weston G, Vollenhoven B, Rombauts L, Green M, Zander-Fox D. PIEZO-ICSI increases fertilization rates compared with conventional ICSI in patients with poor prognosis. J Assist Reprod Genet 2023; 40:389-398. [PMID: 36586007 PMCID: PMC9935778 DOI: 10.1007/s10815-022-02701-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 12/17/2022] [Indexed: 01/01/2023] Open
Abstract
PURPOSE Limited research has been published comparing PIEZO-ICSI with conventional ICSI. While positive effects have been documented in improving fertilization and degeneration, the outcomes in patients with previous poor results from conventional ICSI remain unclear. It is hypothesized that these patients may benefit the most from this form of insemination. METHODS This retrospective paired within-patient cohort study investigated patients (n=72) undertaking PIEZO-ICSI after a previous conventional ICSI cycle resulted in poor outcomes (including low fertilization (<50%), high degeneration (>15%), and/or poor embryo development and utilization). Patients required at least five oocytes collected in both cycles and a period of less than 2 years between the cycles. The outcomes of both cycles were compared in respect to fertilization, degeneration, embryo utilization, and pregnancy rates. Further analyses were applied to patients <38 and ≥38 years of age, with <50% or ≥50% fertilization with conventional ICSI and with <20% or ≥20% utilization with conventional ICSI. RESULTS PIEZO-ICSI resulted in significantly higher fertilization (61.9% vs 45.3%, P<0.0001) and lower degeneration (7.7% vs 18.2%, P=0.0001) when compared to the conventional ICSI cycles. The greatest benefit was seen in patients who had less than 50% fertilization or <20% utilization in their conventional ICSI cycle, with improvements in fertilization and degeneration rates resulting in a significantly higher number of embryos utilized (frozen or transferred) per cycle. CONCLUSIONS PIEZO-ICSI improved fertilization, degeneration, and utilization rates in patients with previous poor outcomes from conventional ICSI. The number of embryos available for use per cycle was also increased. Further significant improvements were achieved in patients who exhibited poor fertilization (<50%) or low utilization (<20%) from conventional ICSI.
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Affiliation(s)
- Melissa Caddy
- Monash IVF, Melbourne, Australia.
- Monash IVF Group, 252-256 Clayton Rd, Clayton, Victoria, 3168, Australia.
| | | | - Gareth Weston
- Monash IVF, Melbourne, Australia
- Monash Health, Melbourne, Australia
| | - Beverley Vollenhoven
- Monash IVF, Melbourne, Australia
- Monash Health, Melbourne, Australia
- Department of Obstetrics and Gynaecology, School of Clinical Science, Monash University, Melbourne, Australia
| | - Luk Rombauts
- Monash IVF, Melbourne, Australia
- Monash Health, Melbourne, Australia
- Department of Obstetrics and Gynaecology, School of Clinical Science, Monash University, Melbourne, Australia
| | - Mark Green
- Monash IVF, Melbourne, Australia
- School of BioSciences, University of Melbourne, Melbourne, Australia
| | - Deirdre Zander-Fox
- Monash IVF, Melbourne, Australia
- Department of Obstetrics and Gynaecology, School of Clinical Science, Monash University, Melbourne, Australia
- University of Adelaide, Adelaide, Australia
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Morimoto T, Maekawa T, Mizuta S, Matsubayashi H, Takeuchi T, Hata Y, Ishikawa T. Optimal puncture position for ICSI can be detected by image analysis using Local Binary Pattern. Reprod Biomed Online 2023; 46:46-53. [PMID: 36307354 DOI: 10.1016/j.rbmo.2022.09.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 09/11/2022] [Accepted: 09/14/2022] [Indexed: 01/31/2023]
Abstract
RESEARCH QUESTION One of the problems during the intracytoplasmic sperm injection (ICSI) procedure is unintentional membrane rupture (UMR), which often predisposes to subsequent oocyte degeneration. Can the ICSI Position Detector (IPD) be useful in identifying the optimal puncture location to prevent UMR during ICSI? DESIGN A total of 709 mature oocytes were included. Conventional ICSI was carried out and images were recorded by IPD; these were analysed retrospectively. RESULTS Inseminated oocytes were retrospectively grouped according to the IPD, irrespective of whether oolemma was punctured at an area in which UMR is likely (non-appropriate group) or unlikely (appropriate group). In the appropriate group, rates of UMR (5.3% versus 18.2%) and degeneration (2.5% versus 8.7%) were significantly lower than those of the non-appropriate group, whereas rate of fertilization (87.1% versus 69.7%) was significantly higher than those of the non-appropriate group, respectively (P < 0.001). These differences remained even after propensity score matching to adjust for potential differences in characteristics between appropriate and non-appropriate groups. CONCLUSIONS This study demonstrated that the IPD is useful to identify the optimal puncture location to circumvent UMR during the ICSI procedure, resulting in reduced UMR and oocyte degeneration, thereby, generating more embryos available for transfer or cryopreservation.
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Affiliation(s)
- Takashi Morimoto
- Department of Reproductive Medicine, Reproduction Clinic Tokyo, Shiodome City Center 3F, 1-5-2 Higashi-shimbashi, Minato-ku, Tokyo 105-7103, Japan.
| | - Tomohiro Maekawa
- Department of Reproductive Medicine, Reproduction Clinic Tokyo, Shiodome City Center 3F, 1-5-2 Higashi-shimbashi, Minato-ku, Tokyo 105-7103, Japan
| | - Shimpei Mizuta
- Department of Reproductive Medicine, Reproduction Clinic Tokyo, Shiodome City Center 3F, 1-5-2 Higashi-shimbashi, Minato-ku, Tokyo 105-7103, Japan; Department of Reproductive Medicine, Reproduction Clinic Osaka, Grand Front Osaka Tower A 15F, 4-20 Ofuka-cho, Kita-ku, Osaka 530-0011, Japan
| | - Hidehiko Matsubayashi
- Department of Reproductive Medicine, Reproduction Clinic Tokyo, Shiodome City Center 3F, 1-5-2 Higashi-shimbashi, Minato-ku, Tokyo 105-7103, Japan; Department of Reproductive Medicine, Reproduction Clinic Osaka, Grand Front Osaka Tower A 15F, 4-20 Ofuka-cho, Kita-ku, Osaka 530-0011, Japan
| | - Takumi Takeuchi
- Department of Reproductive Medicine, Reproduction Clinic Tokyo, Shiodome City Center 3F, 1-5-2 Higashi-shimbashi, Minato-ku, Tokyo 105-7103, Japan
| | - Yutaka Hata
- Graduate School of Simulation Studies, University of Hyogo, 7-1-28, Minatojimaminami-cho, Chuo-ku, Kobe, Japan
| | - Tomomoto Ishikawa
- Department of Reproductive Medicine, Reproduction Clinic Tokyo, Shiodome City Center 3F, 1-5-2 Higashi-shimbashi, Minato-ku, Tokyo 105-7103, Japan; Department of Reproductive Medicine, Reproduction Clinic Osaka, Grand Front Osaka Tower A 15F, 4-20 Ofuka-cho, Kita-ku, Osaka 530-0011, Japan
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12
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Briski O, Salamone DF. Past, present and future of ICSI in livestock species. Anim Reprod Sci 2022; 246:106925. [PMID: 35148927 DOI: 10.1016/j.anireprosci.2022.106925] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 01/03/2022] [Accepted: 01/16/2022] [Indexed: 12/14/2022]
Abstract
During the past 2 decades, intracytoplasmic sperm injection (ICSI) has become a routine technique for clinical applications in humans. The widespread use among domestic species, however, has been limited to horses. In horses, ICSI is used to reproduce elite individuals and, as well as in humans, to mitigate or even circumvent reproductive barriers. Failures in superovulation and conventional in vitro fertilization (IVF) have been the main reason for the use of this technology in horses. In pigs, ICSI has been successfully used to produce transgenic animals. A series of factors have resulted in implementation of ICSI in pigs: need to use zygotes for numerous technologies, complexity of collecting zygotes surgically, and problems of polyspermy when there is utilization of IVF procedures. Nevertheless, there have been very few additional reports confirming positive results with the use of ICSI in pigs. The ICSI procedure could be important for use in cattle of high genetic value by maximizing semen utilization, as well as for utilization of spermatozoa from prepubertal bulls, by providing the opportunity to shorten the generation interval. When attempting to utilize ICSI in ruminants, there are some biological limitations that need to be overcome if this procedure is going to be efficacious for making genetic improvements in livestock in the future. In this review article, there is an overview and projection of the methodologies and applications that are envisioned for ICSI utilization in these species in the future.
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Affiliation(s)
- O Briski
- Universidad de Buenos Aires, Facultad de Agronomía, Departamento de Producción Animal, Buenos Aires, Laboratorio Biotecnología Animal (LabBA), Av. San Martin 4453, Ciudad Autónoma de, Buenos Aires 1417, Argentina; CONICET-Universidad de Buenos Aires, Instituto de Investigaciones en Producción Animal (INPA), Buenos Aires, Argentina
| | - D F Salamone
- Universidad de Buenos Aires, Facultad de Agronomía, Departamento de Producción Animal, Buenos Aires, Laboratorio Biotecnología Animal (LabBA), Av. San Martin 4453, Ciudad Autónoma de, Buenos Aires 1417, Argentina; CONICET-Universidad de Buenos Aires, Instituto de Investigaciones en Producción Animal (INPA), Buenos Aires, Argentina.
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13
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Wang H, Obeidy P, Wang Z, Zhao Y, Wang Y, Su QP, Cox CD, Ju LA. Fluorescence-coupled micropipette aspiration assay to examine calcium mobilization caused by red blood cell mechanosensing. EUROPEAN BIOPHYSICS JOURNAL : EBJ 2022; 51:135-146. [PMID: 35286429 PMCID: PMC8964638 DOI: 10.1007/s00249-022-01595-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 02/21/2022] [Accepted: 02/24/2022] [Indexed: 12/16/2022]
Abstract
Mechanical stimuli such as tension, compression, and shear stress play critical roles in the physiological functions of red blood cells (RBCs) and their homeostasis, ATP release, and rheological properties. Intracellular calcium (Ca2+) mobilization reflects RBC mechanosensing as they transverse the complex vasculature. Emerging studies have demonstrated the presence of mechanosensitive Ca2+ permeable ion channels and their function has been implicated in the regulation of RBC volume and deformability. However, how these mechanoreceptors trigger Ca2+ influx and subsequent cellular responses are still unclear. Here, we introduce a fluorescence-coupled micropipette aspiration assay to examine RBC mechanosensing at the single-cell level. To achieve a wide range of cell aspirations, we implemented and compared two negative pressure adjusting apparatuses: a homemade water manometer (- 2.94 to 0 mmH2O) and a pneumatic high-speed pressure clamp (- 25 to 0 mmHg). To visualize Ca2+ influx, RBCs were pre-loaded with an intensiometric probe Cal-520 AM, then imaged under a confocal microscope with concurrent bright-field and fluorescent imaging at acquisition rates of 10 frames per second. Remarkably, we observed the related changes in intracellular Ca2+ levels immediately after aspirating individual RBCs in a pressure-dependent manner. The RBC aspirated by the water manometer only displayed 1.1-fold increase in fluorescence intensity, whereas the RBC aspirated by the pneumatic clamp showed up to threefold increase. These results demonstrated the water manometer as a gentle tool for cell manipulation with minimal pre-activation, while the high-speed pneumatic clamp as a much stronger pressure actuator to examine cell mechanosensing directly. Together, this multimodal platform enables us to precisely control aspiration and membrane tension, and subsequently correlate this with intracellular calcium concentration dynamics in a robust and reproducible manner.
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Affiliation(s)
- Haoqing Wang
- School of Biomedical Engineering, Faculty of Engineering, The University of Sydney, Darlington, NSW, 2008, Australia.,Charles Perkins Centre, The University of Sydney, Camperdown, NSW, 2006, Australia.,Heart Research Institute, Newtown, NSW, 2042, Australia
| | - Peyman Obeidy
- School of Biomedical Engineering, Faculty of Engineering, The University of Sydney, Darlington, NSW, 2008, Australia
| | - Zihao Wang
- School of Biomedical Engineering, Faculty of Engineering, The University of Sydney, Darlington, NSW, 2008, Australia.,School of Aerospace, Mechanical and Mechatronic Engineering, Faculty of Engineering, The University of Sydney, Darlington, NSW, 2008, Australia
| | - Yunduo Zhao
- School of Biomedical Engineering, Faculty of Engineering, The University of Sydney, Darlington, NSW, 2008, Australia.,Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Sydney, NSW, 2010, Australia
| | - Yao Wang
- School of Biomedical Engineering, Faculty of Engineering, The University of Sydney, Darlington, NSW, 2008, Australia.,Cellular and Genetic Medicine Unit, School of Medical Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Qian Peter Su
- Charles Perkins Centre, The University of Sydney, Camperdown, NSW, 2006, Australia.,Heart Research Institute, Newtown, NSW, 2042, Australia.,School of Biomedical Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Charles D Cox
- Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Sydney, NSW, 2010, Australia.,Faculty of Medicine, St. Vincent's Clinical School, University of New South Wales, Sydney, NSW, 2010, Australia
| | - Lining Arnold Ju
- School of Biomedical Engineering, Faculty of Engineering, The University of Sydney, Darlington, NSW, 2008, Australia. .,Charles Perkins Centre, The University of Sydney, Camperdown, NSW, 2006, Australia. .,Heart Research Institute, Newtown, NSW, 2042, Australia.
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14
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Hiraoka K, Uchida N, Ishikawa T, Kawai K. Value of Meiotic Spindle Imaging on Fertilization and Embryo Development Following Human Oocyte Piezo-ICSI. FERTILITY & REPRODUCTION 2022. [DOI: 10.1142/s2661318222500049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Background: The objective of this study was to investigate accurately the effect of the meiotic spindle imaging of human oocytes on their fertilization and embryo development by using the Piezo-ICSI. Methods: We retrospectively assessed 529 oocytes with the first polar body retrieved from 124 infertile couples (147 cycles) who attended our clinic between May 2016 and December 2018. Of these, 489 oocytes (92.4%) with visible meiotic spindle comprised the Spindle (+) group and 40 oocytes (7.6%) not observed meiotic spindle comprised the Spindle (−) group. The meiotic spindle was imaged using polarized light microscopy. The rates of fertilization, high-quality day-3 embryo, day-5 blastocyst, and high-quality day-5 blastocyst were evaluated in both groups. Results: The fertilization rates of Spindle (+) and Spindle (−) were 92.0% (450/489) and 70.0% (28/40), respectively; high-quality day-3 embryo rates were 62.9% (283/450) and 35.7% (10/28); day-5 blastocyst rates were 53.7% (205/382) and 32.1% (9/28); high-quality day-5 blastocyst rates were 29.8% (114/382) and 3.6% (1/28). Fertilization, high-quality day-3 embryo, day-5 blastocyst, and high-quality day-5 blastocyst rates were significantly higher in the Spindle (+) group than in the Spindle (−) group. Conclusion: Spindle imaging (i.e., oocytes with a visible meiotic spindle or with not observed meiotic spindle) influences the outcome of Piezo-ICSI in human oocytes, including fertilization and embryo development. To our knowledge, this study is the first to evaluate the effect of meiotic spindle imaging on fertilization or embryo development among oocytes after Piezo-ICSI. The meiotic spindle imaging could be the indicator for the quality management of medical doctors and embryologists.
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Affiliation(s)
- Kenichiro Hiraoka
- Kameda IVF Clinic Makuhari, Makuhari Techno Garden D3F, 1-3 Nakase Mihama-ku, Chiba 261-8501, Japan
- Kameda Medical Center, 929 Higashi-cho, Kamogawa-shi, Chiba 296-8602, Japan
- Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Nozomi Uchida
- Kameda IVF Clinic Makuhari, Makuhari Techno Garden D3F, 1-3 Nakase Mihama-ku, Chiba 261-8501, Japan
| | - Tomonori Ishikawa
- Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Kiyotaka Kawai
- Kameda IVF Clinic Makuhari, Makuhari Techno Garden D3F, 1-3 Nakase Mihama-ku, Chiba 261-8501, Japan
- Kameda Medical Center, 929 Higashi-cho, Kamogawa-shi, Chiba 296-8602, Japan
- Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
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15
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Wang H, Zhou F, Guo Y, Ju LA. Micropipette-based biomechanical nanotools on living cells. EUROPEAN BIOPHYSICS JOURNAL : EBJ 2022; 51:119-133. [PMID: 35171346 PMCID: PMC8964576 DOI: 10.1007/s00249-021-01587-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 08/30/2021] [Accepted: 12/13/2021] [Indexed: 12/14/2022]
Abstract
Mechanobiology is an emerging field at the interface of biology and mechanics, investigating the roles of mechanical forces within biomolecules, organelles, cells, and tissues. As a highlight, the recent advances of micropipette-based aspiration assays and dynamic force spectroscopies such as biomembrane force probe (BFP) provide unprecedented mechanobiological insights with excellent live-cell compatibility. In their classic applications, these assays measure force-dependent ligand-receptor-binding kinetics, protein conformational changes, and cellular mechanical properties such as cortical tension and stiffness. In recent years, when combined with advanced microscopies in high spatial and temporal resolutions, these biomechanical nanotools enable characterization of receptor-mediated cell mechanosensing and subsequent organelle behaviors at single-cellular and molecular level. In this review, we summarize the latest developments of these assays for live-cell mechanobiology studies. We also provide perspectives on their future upgrades with multimodal integration and high-throughput capability.
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Affiliation(s)
- Haoqing Wang
- School of Biomedical Engineering, Faculty of Engineering, The University of Sydney, Darlington, NSW, Australia.,Charles Perkins Centre, The University of Sydney, Camperdown, NSW, Australia.,Heart Research Institute, Newtown, NSW, Australia
| | - Fang Zhou
- School of Biomedical Engineering, Faculty of Engineering, The University of Sydney, Darlington, NSW, Australia
| | - Yuze Guo
- School of Biomedical Engineering, Faculty of Engineering, The University of Sydney, Darlington, NSW, Australia
| | - Lining Arnold Ju
- School of Biomedical Engineering, Faculty of Engineering, The University of Sydney, Darlington, NSW, Australia. .,Charles Perkins Centre, The University of Sydney, Camperdown, NSW, Australia. .,Heart Research Institute, Newtown, NSW, Australia.
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16
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Watanabe S, Miura M, Morita H, Nishi M, Yokota SI, Hattori S, Matsumoto H, Fukui E, Kusakabe KT, Ochi M, Nakagata N, Kiso Y, Kai C, Yoshizawa M. Successful blastocyst production by intracytoplasmic injection of sperm after in vitro maturation of follicular oocytes obtained from immature female squirrel monkeys (Saimiri boliviensis). J Reprod Dev 2021; 67:265-272. [PMID: 34248070 PMCID: PMC8423609 DOI: 10.1262/jrd.2021-018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Advanced reproductive technologies are being applied for the propagation of squirrel monkeys, to ensure their preservation as a genetic resource and the effective use of their gametes in
the future. In the present study, oocytes and spermatozoa were collected from live squirrel monkeys, following which piezo intracytoplasmic sperm injection (ICSI) was performed using these
gametes. Follicular development was induced by administering equine chorionic gonadotropin (eCG) containing inhibin antiserum to an immature squirrel monkey female. The unilateral ovary was
excised after the administration of human chorionic gonadotropin (hCG), to induce ovulation, following which the larger developed follicular oocytes were collected. Follicular oocytes were
prepared for ICSI using sperm from the epididymal tail of a unilateral testis extracted from a mature male. The embryos were continuously incubated in CMRL 1066 medium supplemented with 10%
(v/v) fetal bovine serum. Embryo culture was performed with cumulus cells. Two experiments of ICSI carried out with three females resulted in 14 mature oocytes from the 49 cumulus-oocyte
complexes collected and five embryos, three of which developed into blastocysts. These blastocysts were vitrified, thawed, and transferred to recipient monkeys, but no pregnancies resulted.
In conclusion, the present study is the first to successfully produce ICSI-derived blastocysts from MII oocytes obtained by means of hormone administration (a combination of eCG+inhibin
antiserum and hCG) and in vitro maturation in immature squirrel monkeys.
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Affiliation(s)
| | | | | | - Moeka Nishi
- Graduate School of Agricultural Science, Utsunomiya University, Tochigi 321-8505, Japan
| | - Shin-Ichi Yokota
- Amami Laboratory, Institute of Medical Science, The University of Tokyo, Kagoshima 894-1531, Japan.,Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan
| | - Shosaku Hattori
- Amami Laboratory, Institute of Medical Science, The University of Tokyo, Kagoshima 894-1531, Japan.,Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan
| | - Hiromichi Matsumoto
- Graduate School of Agricultural Science, Utsunomiya University, Tochigi 321-8505, Japan
| | - Emiko Fukui
- Graduate School of Agricultural Science, Utsunomiya University, Tochigi 321-8505, Japan
| | - Ken Takeshi Kusakabe
- Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | | | - Naomi Nakagata
- Division of Reproductive Biotechnology and Innovation, Centre for Animal Resources and Development, Kumamoto University, Kumamoto 860-0811, Japan
| | - Yasuo Kiso
- Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Chieko Kai
- Amami Laboratory, Institute of Medical Science, The University of Tokyo, Kagoshima 894-1531, Japan.,Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan
| | - Midori Yoshizawa
- Graduate School of Agricultural Science, Utsunomiya University, Tochigi 321-8505, Japan
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17
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Zander-Fox D, Lam K, Pacella-Ince L, Tully C, Hamilton H, Hiraoka K, McPherson NO, Tremellen K. PIEZO-ICSI increases fertilization rates compared with standard ICSI: a prospective cohort study. Reprod Biomed Online 2021; 43:404-412. [PMID: 34326006 DOI: 10.1016/j.rbmo.2021.05.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 04/25/2021] [Accepted: 05/21/2021] [Indexed: 11/19/2022]
Abstract
RESEARCH QUESTION Is PIEZO-intracytoplasmic sperm injection (ICSI) coupled with a new novel operational fluid (perfluoro-n-octane) superior to standard ICSI? DESIGN A cohort of patients (n = 69) undertaking microinjection were recruited between January and November 2019 and were then prospectively case-matched. Patients required six or more mature oocytes for inclusion in the study. PIEZO-ICSI uses high-speed microinjection drilling to penetrate the zona and oolemma and deposit the spermatozoa into the cytoplasm, compared with the traditional 'cutting' action of ICSI. The primary outcome was fertilization, with secondary outcomes including oocyte degeneration, abnormal fertilization, embryo cryopreservation and embryo utilization. RESULTS PIEZO-ICSI resulted in significantly higher fertilization rates (80.5 ± 2.4% vs 65.8 ± 2.3%, P < 0.0001) and lower oocyte degeneration rates (4.4 ± 1.3% vs 8.6 ± 1.2%, P = 0.019) and abnormal fertilization rates (2.9 ± 1.1% vs 7.4 ± 1.1%; P = 0.003) compared with standard ICSI. This improvement in fertilization was of most benefit in patients aged ≥38 years. This increase in fertilization increased the number of good quality embryos that were available for cryopreservation/transfer (3.8 ± 0.2 vs 3.1 ± 0.2; P = 0.038), such that patients on average had one extra usable embryo per cycle compared with standard ICSI. There were no differences to Day 5 embryo development or clinical pregnancy from fresh embryo transfer (57.1% PIEZO-ICSI vs 60.0% ICSI) between microinjection methods, although pregnancy outcomes were underpowered. CONCLUSIONS PIEZO-ICSI significantly increased fertilization rates, thereby increasing the number of embryos available for cryopreservation compared with standard ICSI. Further prospective studies assessing cumulative pregnancy rates are warranted.
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Affiliation(s)
- Deirdre Zander-Fox
- Repromed, Dulwich South Australia, Australia; Robinson Research Institute, University of Adelaide, Adelaide South Australia, Australia; Department of Bioengineering, University of South Australia, Adelaide South Australia, Australia; Monash University, Clayton South Australia, Australia; Monash IVF Group, Richmond Victoria, Australia.
| | - Kevin Lam
- Repromed, Dulwich South Australia, Australia
| | - Leanne Pacella-Ince
- Repromed, Dulwich South Australia, Australia; Robinson Research Institute, University of Adelaide, Adelaide South Australia, Australia
| | - Cathy Tully
- Repromed, Dulwich South Australia, Australia
| | | | | | - Nicole O McPherson
- Repromed, Dulwich South Australia, Australia; Robinson Research Institute, University of Adelaide, Adelaide South Australia, Australia; Freemasons Center for Male Health and Wellbeing, University of Adelaide, Adelaide South Australia, Australia
| | - Kelton Tremellen
- Repromed, Dulwich South Australia, Australia; Department of Obstetrics, Gynaecology and Reproductive Medicine, Flinders University, Bedford Park South Australia, Australia
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Iwayama H, Yamashita M. Quantitative evaluation of intercellular local deformation of human oocytes during Piezo-assisted intracytoplasmic sperm injection using video-based motion analysis. F&S SCIENCE 2021; 2:124-134. [PMID: 35559747 DOI: 10.1016/j.xfss.2021.01.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 12/22/2020] [Accepted: 01/08/2021] [Indexed: 06/15/2023]
Abstract
OBJECTIVE To evaluate the relationship between the quantitative properties of local deformation of the ooplasm during Piezo-assisted intracytoplasmic sperm injection (Piezo-ICSI) and oocyte developmental fate after Piezo-ICSI. DESIGN Video-based motion analysis and case-control study. SETTING Private fertility center. PATIENT(S) A total of 99 couples assigned to the standard Piezo-ICSI program. INTERVENTION(S) Video recordings of the sperm injection process during Piezo-ICSI. MAIN OUTCOME MEASURE(S) Quantitative deformation properties consisting of the orientation of deformation perpendicular (Perp) or parallel (Para) to the oolemma and the mechanical response of the ooplasm (elongation, contraction, and total): Perp-elongation, Perp-contraction, Perp-total, Para-elongation, Perp-contraction, and Para-total. RESULT(S) The deformation parameters were compared among different angular ranges of 30°-60°, 60°-90°, 90°-120°, and 120°-150° (defined as 0° at the 3 o'clock puncture site). The Perp-total value at 30°-60° was significantly greater than that at the other angles (130.2 vs. 57.7-85.5, respectively) primarily due to substantially greater Perp-elongation values. The Para-total value at 30°-60° was significantly greater than that at the other angles (20.1 vs. 6.7-10.3, respectively) primarily due to substantially smaller Para-contraction values. The deformation parameters of the ooplasm adjacent to the first polar body were also compared among different developmental fates (fertilization failure, cleavage arrest, and blastocyst development). The Perp-total value of oocytes derived from blastocyst formation was significantly smaller than those derived from other developmental fates (58.1 vs. 70.0-87.3, respectively). CONCLUSION(S) The Piezo-ICSI process induced deformation with various mechanical behaviors in different regions within a single oocyte. Furthermore, the exposure of the ooplasm adjacent to the first polar body to excessive deformation was found to be a possible trigger for adverse fertilization and embryo development after Piezo-ICSI.
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19
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Saito M, Tatsumi T, Nakasuji T, Ibayashi M, Harada T, Mutoh T, Ito C, Komiya A, Hiraoka K, Kawai K. Successful pregnancy and delivery achieved following intracytoplasmic sperm injection using teratozoospermic sperm exhibiting marked dysplasia of the fibrous sheath: a case report. Transl Androl Urol 2020; 9:800-806. [PMID: 32420187 PMCID: PMC7215008 DOI: 10.21037/tau.2019.12.14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
A husband and his wife, both 34 years old, consulted our clinic because of primary infertility. Sperm analysis revealed that the sperm concentration, motility, and progressive motility were (42.8±22.8)×106/mL, 23.3%±12.2%, and 12.9%±6.1%, respectively. Based on Krugar strict morphology criteria, 100% of the sperm were teratozoospermic, with 7.9% DNA fragmentation index. Observation of the sperm under a transmission electron microscope revealed that most parts of the fibrous sheath (FS) surrounding the tails of the sperm were missing from midway through the principal piece to the end piece, although the sperm’s heads, necks and midpieces were morphologically normal. To collect oocytes, the gonadotropin-releasing hormone antagonist protocol was carried out, and 7 oocytes were retrieved. Intracytoplasmic sperm injection (ICSI) was performed for all the teratozoospermic sperm. Of the 7 oocytes, 3 were fertilized, and one 8-cell embryo and 2 expanded blastocysts were vitrified. Although repeated transfers of expanded blastocysts resulted in no implantation, one 8-cell embryo transfer in a hormone replacement therapy cycle led to pregnancy. The pregnancy using an 8-cell vitrified embryo resulted in the delivery of a healthy female baby at 38 weeks of gestation. No congenital malformations were found until 28 days after birth. Our results demonstrated that healthy birth could be achieved following the transfer of an embryo derived from ICSI using teratozoospermic sperm exhibiting the dysplasia of the fibrous sheath (DFS). Furthermore, while the previous reports on DFS have not investigated male infertility, we evaluated sperms from various aspects such as Kruger sperm function test, chromatin dispersion test, electron microscopy findings, time-lapse images of the obtained embryos, and concluded that ICSI could be desirable as a treatment policy for DFS.
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Affiliation(s)
- Masato Saito
- Department of Reproductive Medicine, Kameda IVF Clinic Makuhari, Chiba, Japan
| | - Takayuki Tatsumi
- Department of Reproductive Medicine, Kameda IVF Clinic Makuhari, Chiba, Japan.,Department of Reproductive Medicine, Kameda Medical Center, Chiba, Japan.,Department of Pediatrics, Perinatal and Maternal Medicine (Ibaraki), Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takashi Nakasuji
- Comprehensive Reproductive Medicine, Regulation of Internal Environment and Reproduction, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Megumi Ibayashi
- Department of Reproductive Medicine, Kameda IVF Clinic Makuhari, Chiba, Japan
| | - Tatsuya Harada
- Comprehensive Reproductive Medicine, Regulation of Internal Environment and Reproduction, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.,Department of Reproductive Medicine, Kubonoya IVF Clinic, Chiba, Japan
| | - Tohru Mutoh
- Department of Functional Anatomy, Reproductive Biology and Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Chizuru Ito
- Department of Functional Anatomy, Reproductive Biology and Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Akira Komiya
- Department of Urology, Chiba University, Graduate School of Medicine, Chiba, Japan
| | - Kenichiro Hiraoka
- Department of Reproductive Medicine, Kameda IVF Clinic Makuhari, Chiba, Japan.,Department of Reproductive Medicine, Kameda Medical Center, Chiba, Japan.,Comprehensive Reproductive Medicine, Regulation of Internal Environment and Reproduction, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kiyotaka Kawai
- Department of Reproductive Medicine, Kameda IVF Clinic Makuhari, Chiba, Japan.,Department of Reproductive Medicine, Kameda Medical Center, Chiba, Japan.,Comprehensive Reproductive Medicine, Regulation of Internal Environment and Reproduction, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
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Fujii Y, Endo Y, Mitsuhata S, Hayashi M, Motoyama H. Evaluation of the effect of piezo-intracytoplasmic sperm injection on the laboratory, clinical, and neonatal outcomes. Reprod Med Biol 2020; 19:198-205. [PMID: 32273827 PMCID: PMC7138935 DOI: 10.1002/rmb2.12324] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 02/07/2020] [Accepted: 03/01/2020] [Indexed: 12/22/2022] Open
Abstract
PURPOSE Limited research has been published on the effect of piezo-assisted intracytoplasmic sperm injection (P-ICSI). We evaluated the effect of P-ICSI on the laboratory, clinical, and neonatal outcomes. METHODS This retrospective study was based on the data collected between April 2011 and October 2016. Total 1348 mature oocytes from 145 patients were analyzed. Laboratory, clinical, and neonatal outcomes of those given conventional intracytoplasmic sperm injection (C-ICSI) and those administered P-ICSI were examined. RESULTS P-ICSI showed significantly more favorable results, with a survival rate of 97.0% (C-ICSI: 94.1%, P < .010) and a fertilization rate of 83.5% (C-ICSI: 70.6%, P < .001). There were no differences in the blastocyst development rate, implantation rate, miscarriage rate, live birth rate, gestational age, birth weight, proportion of male neonates, cesarean section rate, and congenital abnormalities between the two patient groups. CONCLUSIONS Our comparison of P-ICSI with C-ICSI showed that P-ICSI significantly improved the survival and fertilization.
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Affiliation(s)
| | - Yuji Endo
- IVF CenterKurashiki Medical ClinicKurashikiJapan
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21
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Dai C, Xin L, Zhang Z, Shan G, Wang T, Zhang K, Wang X, Chu LT, Ru C, Sun Y. Design and Control of a Piezo Drill for Robotic Piezo-Driven Cell Penetration. IEEE Robot Autom Lett 2020. [DOI: 10.1109/lra.2019.2958734] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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22
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Furuhashi K, Saeki Y, Enatsu N, Iwasaki T, Ito K, Mizusawa Y, Matsumoto Y, Kokeguchi S, Shiotani M. Piezo-assisted ICSI improves fertilization and blastocyst development rates compared with conventional ICSI in women aged more than 35 years. Reprod Med Biol 2019; 18:357-361. [PMID: 31607795 PMCID: PMC6780025 DOI: 10.1002/rmb2.12290] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 06/11/2019] [Accepted: 07/09/2019] [Indexed: 01/28/2023] Open
Abstract
PURPOSE Piezo-assisted intracytoplasmic sperm injection (Piezo-ICSI) is reported to be an effective method for inseminating fragile oocytes compared with conventional ICSI (c-ICSI). However, infertile patient groups suitable for Piezo-ICSI have not been elucidated. This study was conducted to determine age groups suitable for Piezo-ICSI using sibling egg controls inseminated by a well-trained embryologist to reduce technical inequalities. METHODS A total of 947 matured oocytes were inseminated either by Piezo-ICSI or by c-ICSI in sibling oocytes as controls. Fertilization (2 pronuclei, PN), survival, and blastocyst development rates on day (D) 5 and D6 after insemination were compared between the Piezo-ICSI and c-ICSI groups. Further analyses were applied to groups of women >35 or ≤35 years of age. RESULTS There were no significant differences in fertilization, survival, or blastocyst development rates between the two insemination treatment groups. However, for women >35 years of age, the fertilization (P = .008) and blastocyst development (P = .016) rates with Piezo-ICSI on D5 and D6 were significantly higher than in those subjected to c-ICSI. CONCLUSIONS Piezo-ICSI was useful for inseminating oocytes from women >35 years of age.
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Ma S, Wang P, Zhou W, Chu D, Zhao S, Fu L, Li Y. A modified holding pipette for mouse oocyte fertilization. Theriogenology 2019; 141:142-145. [PMID: 31541783 DOI: 10.1016/j.theriogenology.2019.09.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 08/21/2019] [Accepted: 09/05/2019] [Indexed: 11/19/2022]
Abstract
The safety of assisted reproductive technology (ART) is of frequent concern. Unfortunately, animal models for studying the safety of intracytoplasmic sperm injection (ICSI) have limitations in mimicking human ICSI manipulations. As reported herein, we invented a modified holding pipette for mouse oocyte injection that resulted in the delivery of live pups. A modified holding pipette was prepared for mouse oocyte injection and was compared with the conventional pipette for human use and a trumpet-shaped pipette. After ICSI, the oocytes were cultured to cleavage embryos until fallopian transfer. The use of the trumpet-shaped holding pipette and the new modified holding pipette for mouse oocyte injection achieved comparable and satisfactory oocyte survival rates (83.44% and 85.71%, respectively) and embryo cleavage rates (41.98% and 42.42%, respectively), which were significantly higher than those obtained with the human egg-holding pipette (oocyte survival rate: 65.85%; embryo cleavage rate: 27.78%). After 13 embryos were transferred using each type of pipette, three live pups were produced with the new modified holding pipette, one was produced with the holding pipette for human use, and none were produced with the trumpet-shaped holding pipette. The modified holding pipette for oocyte injection is effective and very easy to prepare. Moreover, using this new method, we produced live pups, which will contribute to a useful animal model for safety studies of ICSI in the future.
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Affiliation(s)
- Shuai Ma
- Medical Center for Human Reproduction, Beijing Chaoyang Hospital, Capital Medical University, #8 Worker's Stadium South Road, Chaoyang District, Beijing, China
| | - Peng Wang
- Medical Center for Human Reproduction, Beijing Chaoyang Hospital, Capital Medical University, #8 Worker's Stadium South Road, Chaoyang District, Beijing, China
| | - Wenhui Zhou
- Medical Center for Human Reproduction, Beijing Chaoyang Hospital, Capital Medical University, #8 Worker's Stadium South Road, Chaoyang District, Beijing, China
| | - Dapeng Chu
- Medical Center for Human Reproduction, Beijing Chaoyang Hospital, Capital Medical University, #8 Worker's Stadium South Road, Chaoyang District, Beijing, China
| | - Shanke Zhao
- Medical Center for Human Reproduction, Beijing Chaoyang Hospital, Capital Medical University, #8 Worker's Stadium South Road, Chaoyang District, Beijing, China
| | - Lei Fu
- Medical Center for Human Reproduction, Beijing Chaoyang Hospital, Capital Medical University, #8 Worker's Stadium South Road, Chaoyang District, Beijing, China.
| | - Yuan Li
- Medical Center for Human Reproduction, Beijing Chaoyang Hospital, Capital Medical University, #8 Worker's Stadium South Road, Chaoyang District, Beijing, China.
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Hiraoka K, Kitamura S, Otsuka Y, Kawai K, Harada T, Ishikawa T. Effects of sperm direction in Piezo-ICSI on oocyte survival, fertilization, embryo development and implantation ability in humans: A preliminary study. J Obstet Gynaecol Res 2018; 44:1963-1969. [PMID: 29992667 DOI: 10.1111/jog.13727] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 06/08/2018] [Indexed: 11/27/2022]
Abstract
AIMS The objective of this study was to investigate the effect of the head-first or tail-first injection of sperm into the cytoplasm by Piezo-ICSI (PICSI) on oocyte survival, fertilization, embryo development and implantation ability in humans. METHODS We retrospectively investigated 632 mature oocytes retrieved from 152 infertile patients who attended our PICSI-ET program at the Niji Clinic between October 2010 and January 2014. Of these, 342 mature oocytes retrieved from 75 patients were injected with sperm head first, and 290 mature oocytes retrieved from 77 patients were injected with sperm tail first into the cytoplasm. The rates of oocyte survival, fertilization, good-quality day-3 embryos, pregnancy, implantation and live birth were evaluated in both groups. RESULTS There were no differences among the two groups with respect to survival, fertilization, good-quality day-3 embryos, pregnancy, implantation and live birth rates. CONCLUSION Sperm direction (i.e., head first or tail first) does not influence the outcome of PICSI in human oocytes, including oocyte survival, fertilization, embryo development and implantation ability. These findings contribute to an understanding of factors that influence the success of human intracytoplasmic sperm injection (ICSI) techniques.
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Affiliation(s)
- Kenichiro Hiraoka
- Kameda Medical Center, Kamogawa-shi, Chiba, Japan.,Kameda IVF Clinic Makuhari, Mihama-ku, Chiba, Japan.,Tokyo Medical and Dental University, Tokyo, Japan
| | | | | | - Kiyotaka Kawai
- Kameda Medical Center, Kamogawa-shi, Chiba, Japan.,Kameda IVF Clinic Makuhari, Mihama-ku, Chiba, Japan.,Tokyo Medical and Dental University, Tokyo, Japan
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Lower blastocyst quality after conventional vs. Piezo ICSI in the horse reflects delayed sperm component remodeling and oocyte activation. J Assist Reprod Genet 2018; 35:825-840. [PMID: 29637506 DOI: 10.1007/s10815-018-1174-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 03/27/2018] [Indexed: 10/17/2022] Open
Abstract
PURPOSE The aim of this study was to evaluate the differential effects of conventional and Piezo-driven ICSI on blastocyst development, and on sperm component remodeling and oocyte activation, in an equine model. METHODS In vitro-matured equine oocytes underwent conventional (Conv) or Piezo ICSI, the latter utilizing fluorocarbon ballast. Blastocyst development was compared between treatments to validate the model. Then, oocytes were fixed at 0, 6, or 18 h after injection, and stained for the sperm tail, acrosome, oocyte cortical granules, and chromatin. These parameters were compared between injection techniques and between sham-injected and sperm-injected oocytes among time periods. RESULTS Blastocyst rates were 39 and 40%. The nucleus number was lower, and the nuclear fragmentation rate was higher, in blastocysts produced by Conv. Cortical granule loss started at 0H after both sperm and sham injection. The acrosome was present at 0H in both ICSI treatments, and persisted to 18H in significantly more Conv than Piezo oocytes (72 vs. 21%). Sperm head area was unchanged at 6H in Conv but significantly increased at this time in Piezo; correspondingly, at 6H significantly more Conv than Piezo oocytes remained at MII (80 vs. 9.5%). Sham injection did not induce significant meiotic resumption. CONCLUSIONS These data show that Piezo ICSI is associated with more rapid sperm component remodeling and oocyte meiotic resumption after sperm injection than is conventional ICSI, and with higher embryo quality at the blastocyst stage. This suggests that there is value in exploring the Piezo technique, utilized with a non-toxic fluorocarbon ballast, for use in clinical human ICSI.
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Pérez-Cerezales S, Laguna-Barraza R, de Castro AC, Sánchez-Calabuig MJ, Cano-Oliva E, de Castro-Pita FJ, Montoro-Buils L, Pericuesta E, Fernández-González R, Gutiérrez-Adán A. Sperm selection by thermotaxis improves ICSI outcome in mice. Sci Rep 2018; 8:2902. [PMID: 29440764 PMCID: PMC5811574 DOI: 10.1038/s41598-018-21335-8] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 01/29/2018] [Indexed: 12/11/2022] Open
Abstract
The ejaculate is a heterogeneous pool of spermatozoa containing only a small physiologically adequate subpopulation for fertilization. As there is no method to isolate this subpopulation, its specific characteristics are unknown. This is one of the main reasons why we lack effective tools to identify male infertility and for the low efficiency of assisted reproductive technologies. The aim of this study was to improve ICSI outcome by sperm selection through thermotaxis. Here we show that a specific subpopulation of mouse and human spermatozoa can be selected in vitro by thermotaxis and that this subpopulation is the one that enters the fallopian tube in mice. Further, we confirm that these selected spermatozoa in mice and humans show a much higher DNA integrity and lower chromatin compaction than unselected sperm, and in mice, they give rise to more and better embryos through intracytoplasmic sperm injection, doubling the number of successful pregnancies. Collectively, our results indicate that a high quality sperm subpopulation is selected in vitro by thermotaxis and that this subpopulation is also selected in vivo within the fallopian tube possibly by thermotaxis.
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Affiliation(s)
| | | | | | | | - Esther Cano-Oliva
- Unit of Reproduction, Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Spain
| | | | - Luis Montoro-Buils
- Unit of Reproduction, Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Spain
| | - Eva Pericuesta
- Department of Animal Reproduction, INIA, Avda. Puerta de Hierro, Madrid, Spain
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Inoue T, Yamashita Y, Tsujimoto Y, Yamamoto S, Taguchi S, Hirao K, Uemura M, Ikawa K, Miyazaki K. The association of follicular fluid volume with human oolemma stretchability during intracytoplasmic sperm injection. Clin Exp Reprod Med 2017; 44:126-131. [PMID: 29026718 PMCID: PMC5636924 DOI: 10.5653/cerm.2017.44.3.126] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 07/21/2017] [Accepted: 08/17/2017] [Indexed: 12/04/2022] Open
Abstract
Objective Oocyte degeneration often occurs after intracytoplasmic sperm injection (ICSI), and the risk factor is low-quality oocytes. The follicular fluid (FF) provides a crucial microenvironment for oocyte development. We investigated the relationships between the FF volume aspirated from individual follicles and oocyte retrieval, oocyte maturity, oolemma stretchability, fertilization, and development. Methods This retrospective study included data obtained from 229 ICSI cycles. Ovarian stimulation was performed according to a gonadotropin-releasing hormone antagonist protocol. Each follicle was individually aspirated and divided into six groups according to FF volume (<1.0, 1.0 to <2.0, 2.0 to <3.0, 3.0 to <4.0, 4.0 to <5.0, and ≥5.0 mL). Oolemma stretchability during ICSI was evaluated using a mechanical stimulus for oolemma penetration, that is, the stretchability was assessed by oolemma penetration with aspiration (high stretchability) or without aspiration (low stretchability). Results Oocyte retrieval rates were significantly lower in the <1.0 mL group than in the ≥1.0 mL groups (46.0% [86/187] vs. 67.5%–74.3% [172/255 to 124/167], respectively; p<0.01). Low oolemma stretchability was significantly more common in the <1.0 mL group than in the ≥1.0 mL groups during ICSI (22.0% [13/59] vs. 5.8%–9.4% [6/104 to 13/139], respectively; p=0.018). There was a relationship between FF volume and oolemma stretchability. However, there were no significant differences in the rates of fertilization, cleavage, ≥7 cells at day 3, and blastocyst development among all groups. Conclusion FF volume is potentially associated with the stretchability of metaphase II oolemma during ICSI. Regarding oolemma stretchability, ensuring a uniform follicular size during ovarian stimulation is crucial to obtain good-quality oocytes.
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Affiliation(s)
- Taketo Inoue
- Umeda Fertility Clinic, Osaka, Japan.,Department of Emergency, Disaster and Critical Care Medicine, Hyogo College of Medicine, Nishinomiya, Japan
| | | | | | | | | | | | - Mikiko Uemura
- Faculty of Rehabilitation, Kobe Gakuin University, Kobe, Japan
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Krause I, Pohler U, Grosse S, Shebl O, Petek E, Chandra A, Ebner T. Characterization of the injection funnel during intracytoplasmic sperm injection reflects cytoplasmic maturity of the oocyte. Fertil Steril 2016; 106:1101-1106. [DOI: 10.1016/j.fertnstert.2016.06.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 06/06/2016] [Accepted: 06/06/2016] [Indexed: 12/22/2022]
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