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Nguyen Thanh T, Nguyen DM, Dinh Le T, Ngoc Do L, Tien Nguyen S, Nguyen Minh P, Nguyen Van P, Minh Bui T, Thi Bui TT, Nguyen Dao H, Trung Nguyen K. The Relationship Between Smooth Endoplasmic Reticulum Clusters in Metaphase II Oocytes and Embryological and Birth Outcomes in Infertile Couples. Int J Gen Med 2024; 17:3269-3277. [PMID: 39070228 PMCID: PMC11283835 DOI: 10.2147/ijgm.s469626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2024] [Accepted: 07/16/2024] [Indexed: 07/30/2024] Open
Abstract
Background To assess the relationship between oocytes with smooth endoplasmic reticulum cluster (SERc) and embryological and birth outcomes in infertile couples. Methods This was a descriptive study that included 231 infertile patients undergoing in vitro fertilization (IVF) with a total of 2447 mature oocytes (MII), of which 279 oocytes with SERc(+) from 100 patients, the remaining 2168 oocytes with SERc(-). Oocytes were evaluated for the presence or absence of the SERc simultaneously with intracytoplasmic sperm injection at 200x magnification using inverted microscopy - Observe D1. Results The mean age of patients was 32.05 ± 5.56 years. One hundred patients had at least one SERc(+) oocyte (with 279 SERc(+) and 956 SERc(-) oocytes). One hundred and thirty-one patients had 1212 SERc(-) oocytes. Fertilization outcomes and the rates of good-quality embryos on day 2 and day 5 did not differ between the SERc(+) and the SERc(-) groups. In the first frozen embryo transfer cycles, the clinical pregnancy rate in the group of patients with SERc(+) was not different with the SERc(-) group (61.1% vs 48.78%, p = 0.074, respectively). The live birth rate in the SERc(+) group was statistically significantly higher than the SERc(-) group (57.7% vs 43.9%, p = 0.045, respectively). Conclusion The fertilization rate, the quality of embryos on days 2 and 5 from oocytes with SERc(+) are similar to those with SERc(-). The live birth rate in the patients with SERc(+) group is statistically significantly higher than the SERc(-) group. There is no difference in clinical pregnancy rate between patients with and without SERc. Therefore, the exclusion of oocytes with SERc should not be recommended.
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Affiliation(s)
- Tung Nguyen Thanh
- Military Institute of Clinical Embryology and Histology, Vietnam Military Medical University, Hanoi, 10000, Vietnam
| | - Duc Minh Nguyen
- Andrology and Fertility Hospital of Hanoi, Hanoi, 10000, Vietnam
| | - Tuan Dinh Le
- Department of Rheumatology and Endocrinology, Military Hospital 103, Vietnam Military Medical University, Hanoi, 10000, Vietnam
| | - Lan Ngoc Do
- Military Institute of Clinical Embryology and Histology, Vietnam Military Medical University, Hanoi, 10000, Vietnam
| | - Son Tien Nguyen
- Department of Rheumatology and Endocrinology, Military Hospital 103, Vietnam Military Medical University, Hanoi, 10000, Vietnam
| | - Phuong Nguyen Minh
- Military Institute of Clinical Embryology and Histology, Vietnam Military Medical University, Hanoi, 10000, Vietnam
| | - Phong Nguyen Van
- Department of Biology and Medical Genetics, Vietnam Military Medical University, Hanoi, 10000, Vietnam
| | - Tien Minh Bui
- Department of Obstetrics and Gynecology, Thai Binh University of Medicine and Pharmacy, Thai Binh, 410000, Vietnam
| | - Tuyen Thanh Thi Bui
- Department of Obstetrics and Gynecology, Thai Binh University of Medicine and Pharmacy, Thai Binh, 410000, Vietnam
| | - Hung Nguyen Dao
- Department of Obstetrics and Gynecology, Military Hospital 103, Vietnam Military Medical University, Hanoi, Vietnam
| | - Kien Trung Nguyen
- Department of Obstetrics and Gynecology, Thai Binh University of Medicine and Pharmacy, Thai Binh, 410000, Vietnam
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Long R, Wang M, Yang Q, Zhang Y, Gao L, Jin L, Zhu L. Smooth endoplasmic reticulum aggregates in oocytes associated with increased risk of neonatal birth defects: A meta-analysis. Acta Obstet Gynecol Scand 2024. [PMID: 38961609 DOI: 10.1111/aogs.14910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 05/03/2024] [Accepted: 06/02/2024] [Indexed: 07/05/2024]
Abstract
INTRODUCTION Previous studies have indicated the association between smooth endoplasmic reticulum aggregates (SERa+) and poorer medically assisted reproduction outcomes. However, the link between SERa+ and neonatal outcomes remains controversial and open for debate. A comprehensive meta-analysis on the relation between SERa+ and the risk of birth defects is needed. MATERIAL AND METHODS The literature search was conducted using the following databases: PubMed, Embase, Cochrane Libraries, Web of Science, and Chinese databases including China National Knowledge Infrastructure (CNKI) and Wan Fang from inception until July 2023. Risk ratio (RR) and 95% confidence interval (CI) were calculated by a fixed-effected model, while heterogeneity was assessed by forest plots and I2 statistic. Funnel plot was produced to assess publication bias. This meta-analysis has been registered on PROSPERO (CRD42022313387). RESULTS The search resulted in 122 studies, 14 of which met the inclusion criteria. The analysis of birth defects revealed a higher risk (RR = 2.17, 95%CI 1.24 to 3.81, p = 0.007) in children derived from SERa+ cycle compared to SERa- cycles (711 vs. 4633). Meanwhile, in a subgroup analysis, the risk of birth defects was significantly increased in the SERa+ oocytes group as compared with the sibling SERa- oocytes group (RR = 3.53, 95%CI 1.21 to 10.24, p = 0.02). CONCLUSIONS To conclude, our analysis indicated that SERa+ cycles/oocytes may have a potential risk of increased additional major birth defects comparing with SERa- cycles/oocytes. This conclusion may provide evidence-based support for clinicians in IVF clinical guidance and embryologists in prudent embryo selection strategy.
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Affiliation(s)
- Rui Long
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Meng Wang
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qiyu Yang
- Department of Gynecology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yini Zhang
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Limin Gao
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lei Jin
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lixia Zhu
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Kang X, Wang J, Yan L. Endoplasmic reticulum in oocytes: spatiotemporal distribution and function. J Assist Reprod Genet 2023; 40:1255-1263. [PMID: 37171741 PMCID: PMC10543741 DOI: 10.1007/s10815-023-02782-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 03/17/2023] [Indexed: 05/13/2023] Open
Abstract
ENDOPLASMIC RETICULUM IN OOCYTES The storage and release of calcium ions (Ca2 +) in oocyte maturation and fertilization are particularly noteworthy features of the endoplasmic reticulum (ER). The ER is the largest organelle in the cell composed of rough ER, smooth ER, and nuclear envelope, and is the main site of protein synthesis, transport and folding, and lipid and steroid synthesis. An appropriate calcium signaling response can initiate oocyte development and embryogenesis, and the ER is the central link that initiates calcium signaling. The transition from immature oocytes to zygotes also requires many coordinated organelle reorganizations and changes. Therefore, the purpose of this review is to generalize information on the function, structure, interaction with other organelles, and spatiotemporal localization of the ER in mammalian oocytes. Mechanisms related to maintaining ER homeostasis have been extensively studied in recent years. Resolving ER stress through the unfolded protein response (UPR) is one of them. We combined the clinical problems caused by the ER in in vitro maturation (IVM), and the mechanisms of ER have been identified by single-cell RNA-seq. This article systematically reviews the functions of ER and provides a reference for assisted reproductive technology (ART) research.
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Affiliation(s)
- Xin Kang
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, 100191, China
- National Clinical Research Center for Obstetrics and Gynecology, Beijing, 100191, China
- Key Laboratory of Assisted Reproduction (Peking University), Ministry of Education, Beijing, 100191, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, 100191, China
- Research Units of Comprehensive Diagnosis and Treatment of Oocyte Maturation Arrest, Chinese Academy of Medical Sciences, Beijing, 100191, China
| | - Jing Wang
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, 100191, China
- National Clinical Research Center for Obstetrics and Gynecology, Beijing, 100191, China
- Key Laboratory of Assisted Reproduction (Peking University), Ministry of Education, Beijing, 100191, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, 100191, China
- Research Units of Comprehensive Diagnosis and Treatment of Oocyte Maturation Arrest, Chinese Academy of Medical Sciences, Beijing, 100191, China
| | - Liying Yan
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, 100191, China.
- National Clinical Research Center for Obstetrics and Gynecology, Beijing, 100191, China.
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Spileers A, De Croo I, Stoop D, Vanden Meerschaut F. Live birth rate per transfer is not impacted by the proportion of smooth endoplasmatic reticulum aggregates oocytes. Facts Views Vis Obgyn 2023; 15:137-144. [PMID: 37436050 PMCID: PMC10410653 DOI: 10.52054/fvvo.15.2.070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/13/2023] Open
Abstract
BACKGROUND Despite the data published to date, prognostic factors and the clinical impact of ICSI cycles with smooth endoplasmatic reticulum aggregates (SERa) positive oocytes remain unclear. OBJECTIVE Are the clinical outcomes of an ICSI cycle impacted by the proportion of oocytes with SERa? MATERIALS AND METHODS Retrospective study (2016-2019), including data from 2468 ovum pick-ups, performed in a tertiary university hospital. Cases are categorised based on the rate of SERa positive oocytes compared to the total number of MII oocytes: 0% (n=2097), <30% (n=262) and ≥30% (n=109). MAIN OUTCOME MEASURES Patient characteristics, cycle characteristics and clinical outcomes are compared between the groups. RESULTS Compared to SERa negative cycles, women with ≥30% SERa positive oocytes are older (36.2y vs. 34.5y, p<0.001), have lower anti-mullerian hormone levels (AMH) (1.6ng/ml vs. 2.3ng/ml, p<0.001), have received more gonadotropins (3227U vs. 2858IU, p=0.003), have a lower number of good quality day 5 blastocysts (1.2 vs. 2.3, p<0.001) and face more blastocyst transfer cancellation (47.7 vs. 23.7%, p<0.001). Women with <30% SERa positive oocytes are younger (33.8y, p=0.04), have higher AMH levels (2.6ng/ml, p<0.001), have more oocytes retrieved (15.1, p<0.001), have a higher number of good quality day 5 blastocysts (3.2, p<0.001) and have less transfer cancellations (14.9%, p<0.001) compared to SERa negative cycles A multivariate analysis shows no significant difference in cycle outcomes between the categories. WHAT IS NEW? Treatment cycles with ≥30% SERa positive oocytes are less likely to result in an embryo transfer when only non-SER oocytes are used. However, live birth rate per transfer is not affected by the proportion of SERa positive oocytes.
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Wang M, Gao L, Yang Q, Long R, Zhang Y, Jin L, Zhu L. Does smooth endoplasmic reticulum aggregation in oocytes impact the chromosome aneuploidy of the subsequent embryos? A propensity score matching study. J Ovarian Res 2023; 16:59. [PMID: 36959673 PMCID: PMC10037775 DOI: 10.1186/s13048-023-01135-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 03/09/2023] [Indexed: 03/25/2023] Open
Abstract
BACKGROUND The appearance of smooth endoplasmic reticulum aggregation (SERa) is one of the most common dysmorphic phenotypes of oocytes, however, the impact of SERa occurrence on in vitro fertilization (IVF) outcomes is controversial. This study aimed to investigate the impact of SERa in oocytes on the aneuploidy of the subsequent embryos in IVF. METHODS In this retrospective cohort study, a total of 114 intracytoplasmic sperm injection (ICSI) cycles with the appearance of SERa undergoing preimplantation genetic testing for aneuploidy (PGT-A) were enrolled, and among them there were 323 SERa(+) oocytes and 1253 sibling unaffected oocytes. The 907 PGT-A cycles without SERa during the same period were enrolled as controls. A propensity score matching of 1:1 ratio between these two groups resulted in 113 matched cycles. The outcome parameters between the SERa(+) cycles/oocytes and the controls were compared. IVF laboratory outcomes, PGT-A outcomes, and clinical and neonatal outcomes were the main outcomes. RESULTS Increased abnormal fertilization rate and reduced blastocyst formation rate can be observed in both SERa(+) cycles and oocytes, some other parameters on developmental potential, such as available embryo rate at Day 3 and available blastocyst rate, were also impaired in the case of SERa occurrences. Among the 910 blastocysts for PGT-A, the percentage of euploid embryos was similar between the matched cohorts, while an unpredicted increase of the proportions of euploid in the SERa(+) oocytes, compared to the SERa(-) oocytes. Moreover, there was no significance in terms of clinical and neonatal outcomes, such as implantation rate, biochemical pregnancy rate, clinical pregnancy rate, miscarriage rate, and live birth rate, regardless of the presence of SERa in cycles and oocytes. CONCLUSIONS The appearance of SERa within mature oocytes has no significant impact on the aneuploidy of subsequent blastocysts. It is recommended to utilize these oocytes, especially for those with few oocytes or advanced maternal age, which is likely to increase the cumulative pregnancy rate. This study may offer evidence to assist embryologists to make clinical decisions concerning SERa(+) oocytes more consciously and rationally.
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Affiliation(s)
- Meng Wang
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Limin Gao
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Qiyu Yang
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Rui Long
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Yini Zhang
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Lei Jin
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
| | - Lixia Zhu
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
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Fang T, Yu W, Ou S, Lu J, Li R, Zhao M, Chan YL, Wang W. The impact of oocytes containing smooth endoplasmic reticulum aggregates on assisted reproductive outcomes: a cohort study. BMC Pregnancy Childbirth 2022; 22:838. [PMCID: PMC9664725 DOI: 10.1186/s12884-022-05141-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 10/20/2022] [Indexed: 11/16/2022] Open
Abstract
Abstract
Background
The impact of smooth endoplasmic reticulum aggregates (SERa) on assisted reproductive technology (ART) outcomes was still controversial. Our objective is to investigate the impact of the presence of SERa on intracytoplasmic sperm injection (ICSI) outcomes.
Methods
This was a retrospective cohort study. A total of 1,090 fresh ICSI cycles from 944 patients between January 2016 and June 2020 were included. Outcomes from clinical, embryological and neonatal aspects were compared between SERa + and SERa- cycles as well as between SERa + and SERa- oocytes.
Results
The total gonadotropin (Gn) dose, number of oocytes retrieved, serum estradiol concentration and number of the available embryo were significantly higher in SERa + cycles than in SERa- cycles (P < 0.05). Comparable two pronuclei (2PN) fertilization rate and poly-pronucleus zygote rate were shown in SERa + and SERa- cycles (P > 0.05), but which were higher in SERa + oocytes than in SERa- oocytes (P < 0.05). No statistical difference in blastocyst formation rate was found in SERa + and SERa- cycles as well as in SERa + and SERa- oocytes (P > 0.05). Good-quality embryo rate was statistically higher in SERa- cycles than in SERa + cycles (P < 0.05), but the difference was comparable between SERa + and SERa- oocytes (P > 0.05). No statistical difference in clinical pregnancy rate, spontaneous abortion rate, live birth rate and premature delivery rate were found in SERa + and SERa- cycles as well as in SERa + and SERa- oocytes (P > 0.05). The implantation rate was comparable in SERa + and SERa- cycles (P > 0.05), but it is higher in the group of only SERa- embryo transfer when compared with the group of mixed SERa + and SERa- embryo transfer (P < 0.05). 159 newborns in SERa + cycles and 140 newborns in SERa- cycles were followed up. Comparable newborn malformation rate was observed between SERa + and SERa- cycles and oocytes (P > 0.05). Logistic regression analysis revealed number of oocytes and total dose of Gn were risk factors for SERa occurrence (aOR = 1.05 and 1.55, P < 0.001).
Conclusion
Oocyte's SERa is correlated with a number of oocytes retrieved and higher Gn dose, but it does not affect pregnancy outcomes and increase newborn malformation rate.
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Kitasaka H, Konuma Y, Tokoro M, Fukunaga N, Asada Y. Oocyte cytoplasmic diameter of ≥130 μm can be used to determine human giant oocytes. F&S SCIENCE 2022; 3:10-17. [PMID: 35559990 DOI: 10.1016/j.xfss.2021.11.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 11/25/2021] [Accepted: 11/29/2021] [Indexed: 12/26/2022]
Abstract
OBJECTIVE To determine if a cytoplasmic diameter of ≥130 μm can help identify human giant oocytes (GOs) in clinical practice and confirm the presence of genetic abnormalities in GOs by assessing the spindle length and centromere numbers. DESIGN Case-control study. SETTING Private in vitro fertilization clinic. PATIENT(S) The subjects were women aged 20-49 years who underwent oocyte retrieval after ovarian stimulation from January 2014 to December 2020. INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) The oocyte diameter was measured; immunofluorescent staining was performed to assess the spindle diameter and centromere numbers. RESULT(S) Among the 254,337 oocytes examined, 561 (0.22%) had a diameter of ≥130 μm. The mean diameter ranges in the normal-sized metaphase II (MII) oocytes (MII group) and GO group were 103.0-119.0 and 132.3-175.9 μm. Spindle size could be measured in 6 GOs with 1 spindle (GO1), 10 GOs with 2 spindles (GO2), and 16 MII groups. The equatorial plane and pole-to-pole distance in the GO1 were significantly longer than in the GO2 and MII groups. The median numbers of centromeres were 86 in GOs with 1 spindle and 42 in each spindle for GOs with 2 spindles among 11 GO1s and 5 GO2s. CONCLUSION(S) This study is the first to define GOs as oocytes with a diameter of ≥130 μm and is a large-scale study surveying the incidence of GO. It is also the first study to analyze and elucidate the relationship between spindle numbers within the cytoplasm of GOs and spindle size and centromeres.
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Affiliation(s)
| | | | - Mikiko Tokoro
- Asada Institute for Reproductive Medicine, Kasugai, Aichi, Japan
| | - Noritaka Fukunaga
- Asada Ladies Clinic, Nagoya, Aichi, Japan; Asada Institute for Reproductive Medicine, Kasugai, Aichi, Japan
| | - Yoshimasa Asada
- Asada Ladies Clinic, Nagoya, Aichi, Japan; Asada Institute for Reproductive Medicine, Kasugai, Aichi, Japan
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Bartolacci A, Intra G, Coticchio G, dell’Aquila M, Patria G, Borini A. Does morphological assessment predict oocyte developmental competence? A systematic review and proposed score. J Assist Reprod Genet 2022; 39:3-17. [PMID: 34993709 PMCID: PMC8866588 DOI: 10.1007/s10815-021-02370-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 11/26/2021] [Indexed: 01/03/2023] Open
Abstract
PURPOSE Does existing scientific literature suggest an impact of oocyte dysmorphisms on biological or clinical outcomes of assisted reproduction treatments? METHODS Studies of interest were selected from an initial cohort of 6651 potentially relevant records retrieved. PubMed was systematically searched for peer-reviewed original papers and reviews identified by keywords and medical subject heading (MeSH) terms. The most relevant publications were critically evaluated to identify criteria for oocyte morphological evaluation and IVF outcomes. For each morphological abnormality, we generated an oocyte literature score (OLS) through the following procedure: (a) papers showing a negative, absence of, or positive correlation between a given abnormality and IVF outcome were scored 1, 0, and - 1, respectively; (b) the sum of these scores was expressed as a fraction of all analyzed papers; (c) the obtained fraction was multiplied by 10 and converted into decimal number. RESULT We identified eleven different dysmorphisms, of which six were extracytoplasmic (COC, zona pellucida, perivitelline space, polar body 1, shape, giant size) and five intracytoplasmic (vacuoles, refractile bodies, SER clusters, granularity, color). Among the extracytoplasmic dysmorphisms, abnormal morphology of the COC generated an OLS of 8.33, indicating a large prevalence (5/6) of studies associated with a negative outcome. Three intracytoplasmic dysmorphisms (vacuoles, SER clusters, and granularity) produced OLS of 7.14, 7.78, and 6.25, respectively, suggestive of a majority of studies reporting a negative outcome. CONCLUSION COC morphology, vacuoles, SER clusters, and granularity produced OLS suggestive of a prevalence of studies reporting a negative outcome.
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Affiliation(s)
| | - Giulia Intra
- 9.Baby, Family and Fertility Center, Via Dante 15, Bologna, Italy
| | | | | | - Gilda Patria
- 9.Baby, Family and Fertility Center, Via Dante 15, Bologna, Italy
| | - Andrea Borini
- 9.Baby, Family and Fertility Center, Via Dante 15, Bologna, Italy
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Xu J, Yang L, Chen ZH, Yin MN, Chen J, Sun L. Oocytes With Smooth Endoplasmic Reticulum Aggregates May Not Impact Blastocyst Euploidy Rate. Front Endocrinol (Lausanne) 2022; 13:851370. [PMID: 36093069 PMCID: PMC9450478 DOI: 10.3389/fendo.2022.851370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Accepted: 04/27/2022] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE To investigate whether the euploidy rate of blastocysts derived from smooth endoplasmic reticulum aggregates (SERa) positive cycles and oocytes are impacted. DESIGN Retrospective cohort study. METHODS A total of 601 preimplantation genetic testing (PGT) cycles with at least one oocyte retrieved in our center between April 2017 and May 2021 were initially included in the study. Women>35 years and PGT cycles with chromosomal structural rearrangements (PGT-SR) were excluded. Embryological and blastocyst ploidy outcomes were compared among SERa+ oocyte, sibling SERa- oocytes and oocytes in SERa- cycles. RESULTS No significant difference was observed among the SERa+ oocyte group, sibling SERa- oocyte group, and SERa- cycle group in the normal fertilization rate (82.1% vs. 77.8% vs. 83.1%, respectively, P=0.061), blastocyst formation rate (71.0% vs. 72.5% vs. 68.4%, respectively, P=0.393), good quality blastocyst formation rate (46.4% vs. 48.3% vs. 42.6%, respectively, P=0.198). No significant difference was observed in the euploidy rate (50.0% vs. 62.5% vs. 63.3%, respectively, P=0.324), mosaic rate (12.5% vs. 9.7% vs. 13.4%, respectively, P=0.506), and aneuploidy rate (37.5% vs. 27.8% vs. 23.2%, respectively, P=0.137) among the three groups. CONCLUSION Our results suggest that the euploidy rate of blastocysts derived from SERa+ cycles and oocytes may not be impacted.
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Wang X, Xiao Y, Sun Z, Zhen J, Yu Q. Smooth Endoplasmic Reticulum Clusters in Oocytes From Patients Who Received Intracytoplasmic Sperm Injections Negatively Affect Blastocyst Quality and Speed of Blastocyst Development. Front Physiol 2021; 12:732547. [PMID: 34955873 PMCID: PMC8695965 DOI: 10.3389/fphys.2021.732547] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 11/15/2021] [Indexed: 11/13/2022] Open
Abstract
Findings regarding the relationship between smooth endoplasmic reticulum clusters (SERCs) in oocytes and blastocyst development have been conflicting. In this study, the effects of SERCs on blastocyst quality and the speed of blastocyst development were evaluated. Patients who received intracytoplasmic sperm injections (ICSI) at our reproductive center from 2016 to 2020 were retrospectively analyzed. SERC (+) oocytes (n = 217) and SERC (-) oocytes (n = 822), as well as SERC (+) cycles (n = 146) and SERC (-) cycles (n = 1,951) were compared. There was no significant difference in embryological, clinical, and neonatal outcomes between the SERC (+) and SERC (-) cycles. The fertilization rate (73.9%), good quality blastocyst rate (26.7%) and the speed of blastocyst development (44.4%) were significantly lower (P < 0.05) in SERC (+) oocytes than in unaffected counterparts (86.2%, 44.1% and 63.4%, respectively). Furthermore, the proportion of blastocysts with trophectoderm (TE) grade C was significantly higher in the SERC (+) oocyte group than in the SERC (-) oocyte group (73.3 vs. 55.9%, P < 0.05). After adjusting for age, years of infertility, endometriosis, stimulation protocols (GnRHa), and male infertility, multiple logistic regression analysis revealed that the presence of SERCs in the oocytes significantly affected the speed of blastocyst development (odds ratio, 2.812; 95% CI, 1.257-6.292; P = 0.012). These findings suggest that the presence of SERCs in oocytes may negatively affect blastocyst quality and the speed of blastocyst development.
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Affiliation(s)
| | | | - ZhengYi Sun
- Department of Gynecology Endocrine and Reproductive Center, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
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Massarotti C, Stigliani S, Ramone A, Bovis F, Sozzi F, Remorgida V, Cagnacci A, Anserini P, Scaruffi P. Occurrence of smooth endoplasmic reticulum aggregates in metaphase II oocytes: relationship with stimulation protocols and outcome of ICSI and IVF cycles. Hum Reprod 2021; 36:907-917. [PMID: 33527992 DOI: 10.1093/humrep/deaa376] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 11/13/2020] [Indexed: 01/09/2023] Open
Abstract
STUDY QUESTION Is there any association between the appearance of smooth endoplasmic reticulum aggregates (SERa) in oocytes and ovarian stimulation, embryological, clinical and neonatal outcomes of ICSI and IVF cycles? SUMMARY ANSWER A suboptimal prolonged ovarian stimulation is detrimental to oocytes by inducing the occurrence of SERa, which reduces the reproductive potential of oocytes. WHAT IS KNOWN ALREADY Controlled ovarian stimulation recruits oocytes of different qualities. Based on current evidence, it was agreed that non-homogeneous cytoplasm may represent the normal variability among oocytes rather than a dysmorphism with developmental significance. The only exception is the appearance of SERa within the ooplasm. Owing to the lack of univocal evidence in this literature about the safety of injecting oocytes with SERa and the mechanism responsible for the occurrence of SERa, this topic is still a matter of debate. STUDY DESIGN, SIZE, DURATION A retrospective, longitudinal cohort study performed at a tertiary level public infertility center. We included 1662 cycles (180 SERa+ and 1482 SERa-) from 1129 women (age: 20-44 years) who underwent IVF/ICSI treatments in 2012-2019. The SERa+ cycles had at least one SERa+ oocyte in the oocyte cohort. The SERa- cycles had morphologically unaffected oocytes. PARTICIPANTS/MATERIALS, SETTING, METHODS We collected stimulation data and embryological, clinical, neonatal outcomes of SERa- and SERa+ cycles and oocytes. MAIN RESULTS AND THE ROLE OF CHANCE Overall, 347 out of 12 436 metaphase II oocytes (2.8%) were affected by SER. We performed only 12 transfers involving at least one SERa+ embryo. Stimulation length (P = 0.002), serum progesterone (P = 0.004) and follicle size (P = 0.046) at trigger, number of retrieved (P = 0.004) and metaphase II (P = 0.0001) oocytes were significantly higher in SERa+ than SERa- cycles. Fertilization rate was significantly (P < 0.0001) reduced in SERa+ cycles and oocytes compared to SERa- counterparts. Embryos of SERa+ cycles had a lower blastocyst formation rate compared to embryos of SERa- cycles (P = 0.059). Statistical analysis according to a generalized estimating equation model performed at patient level demonstrated that the duration of ovarian stimulation was predictive of SERa+ oocytes appearance. The clinical success of SERa+ cycles was lower than SERa- cycles, although no differences in neonatal birthweights or malformations were recorded in sibling unaffected oocytes of SERa+ cycles. LIMITATIONS, REASONS FOR CAUTION Given that SERa+ oocytes were discarded in our center for years and transfers of embryos originating from affected oocytes were generally avoided, clinical outcomes of SERa+ cycles are largely attributable to the transfer of embryos derived from unaffected oocytes of SERa+ cycles and we did not have data about newborns from affected oocytes, since none of the transfers involving SERa+ embryos resulted in a progressive clinical pregnancy. WIDER IMPLICATIONS OF THE FINDINGS For the first time, we speculate that the late-follicular phase elevated serum progesterone caused by a suboptimal prolonged ovarian stimulation may be detrimental to the oocytes by inducing the occurrence of SERa, resulting in negative effects on their reproductive potential. This raises the question of whether some stimulation regimens could be worse than others and a change in stimulation protocol would reduce the possibility of producing oocytes with suboptimal maturation. In particular, our data highlight the importance of correct timing of the trigger in order to maximize oocyte collection, not only in terms of numerosity but also their reproductive potential. STUDY FUNDING/COMPETING INTEREST(S) None. TRIAL REGISTRATION NUMBER N/A.
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Affiliation(s)
- Claudia Massarotti
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), Academic Unit of Obstetrics and Gynecology, University of Genova, 16132 Genova, Italy
| | - Sara Stigliani
- UOS Physiopathology of Human Reproduction, IRCCS Ospedale Policlinico San Martino, 10-16132 Genova, Italy
| | - Arianna Ramone
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), Academic Unit of Obstetrics and Gynecology, University of Genova, 16132 Genova, Italy
| | - Francesca Bovis
- Department of Health Sciences (DISSAL), University of Genova, 16132 Genova, Italy
| | - Fausta Sozzi
- UOS Physiopathology of Human Reproduction, IRCCS Ospedale Policlinico San Martino, 10-16132 Genova, Italy
| | - Valentino Remorgida
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), Academic Unit of Obstetrics and Gynecology, University of Genova, 16132 Genova, Italy
| | - Angelo Cagnacci
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), Academic Unit of Obstetrics and Gynecology, University of Genova, 16132 Genova, Italy
| | - Paola Anserini
- UOS Physiopathology of Human Reproduction, IRCCS Ospedale Policlinico San Martino, 10-16132 Genova, Italy
| | - Paola Scaruffi
- UOS Physiopathology of Human Reproduction, IRCCS Ospedale Policlinico San Martino, 10-16132 Genova, Italy
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Zhang H, Hu W, Zhong Y, Guo Z. Meta-analysis of the effects of smooth endoplasmic reticulum aggregation on birth outcome. BMC Pregnancy Childbirth 2021; 21:374. [PMID: 33980189 PMCID: PMC8117493 DOI: 10.1186/s12884-021-03850-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 05/05/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Smooth endoplasmic reticulum aggregation (SERa, SER+) has been reported to increase the risk of birth malformations and other abnormal outcomes, miscarriage, and perinatal complications. Other studies, however, suggest that SER+ embryos may develop into healthy infants. One report indicates that 25% of in vitro fertilization (IVF) centers discard SER+ oocytes. Thus, we investigated the effect of SER+ on birth outcomes in IVF and intracytoplasmic sperm injection. METHODS We performed a literature search using PubMed, ScienceDirect, Cochrane, Embase, Ovid, and Scopus. We found a total of 1500 relevant studies between 1978 and 2020 and conducted a meta-analysis to study the effects of SER+ on live births, birth weight, and the number of metaphase II (MII) oocytes retrieved per cycle. RESULTS Eleven eligible studies were included. If the SER+ zygote was evaluated again at the embryo transfer (ET) stage, SER+ did not affect birth or infant body weight. Stimulated ovaries producing too many oocytes per cycle were positively correlated with SER+ (OR = 1.28, 95% CI = 0.41-2.15; p = 0.004). SER+ was positively correlated with oocyte maturation rate, and observed heterogeneity in a previous meta-analysis was likely due to maternal age. Our data also showed that SER+ cycles produced more oocytes but achieved the same number of births from ET. CONCLUSIONS The use of SER+ MII oocytes is rare, with the collection of many oocytes in 1 cycle potentially inducing SER+. SER+ may be more common than we originally thought, as some SER+ is found in all oocytes. Although SER+ positively affected oocyte maturation rate, it did not affect births. We hypothesized that this is because the best embryos are chosen at every step of the process, and the oocytes with the poorest characteristics are removed. We therefore suggest a standard method for measuring SER+. Although embryos produced from SER+ cycles can be used, they should only be transferred when no other suitable embryos are available over several cycles.
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Affiliation(s)
- Hongqin Zhang
- Chengdu Jinjing Maternal and Child Health Hospital, Jinxin Research Institute for Reproductive Medicine and Genetics, No. 3 Sanguantang Road, Chengdu, 610051, People's Republic of China
| | - Wenhui Hu
- Chengdu Xi'nan Gynecology Hospital of Jinxin Medical Group, No. 66 Bisheng Road, Chengdu, 610023, People's Republic of China
| | - Ying Zhong
- Chengdu Xi'nan Gynecology Hospital of Jinxin Medical Group, No. 66 Bisheng Road, Chengdu, 610023, People's Republic of China.
| | - Zhenhua Guo
- Key Laboratory of Combining Farming and Animal Husbandry, Ministry of Agriculture and Rural Affairs, Heilongjiang Academy of Agricultural Sciences, Animal Husbandry Research Institute, No. 368 Xuefu Road, Harbin, 150086, People's Republic of China.
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Xu J, Yang L, Chen ZH, Yin MN, Chen J, Sun L. Oocytes With Smooth Endoplasmic Reticulum Aggregates Are Not Associated With Impaired Reproductive Outcomes: A Matched Retrospective Cohort Study. Front Endocrinol (Lausanne) 2021; 12:688967. [PMID: 34512544 PMCID: PMC8426629 DOI: 10.3389/fendo.2021.688967] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 08/09/2021] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE To investigate whether the reproductive outcomes of oocytes with smooth endoplasmic reticulum aggregates (SERa) are impaired. METHODS A total of 2893 intracytoplasmic sperm injection (ICSI) cycles were performed between January 2010 and December 2019 in our center. In 43 transfer cycles, transferred embryos were totally derived from SERa+ oocytes. Each of the 43 cycles was matched with a separate control subject from SERa- patient of the same age ( ± 1 year), embryo condition, main causes of infertility, type of protocols used for fresh or frozen embryo transfer cycles. The clinical pregnancy, implantation, ectopic pregnancy and live birth rate were compared between the two groups. RESULTS 43 embryo transfer cycles from SERa- patient were matched to the 43 transferred cycles with pure SERa+ oocytes derived embryos. No significant difference was observed in clinical pregnancy rate (55.81% vs. 65.11%, p=0.5081), implantation rate (47.89% vs. 50.70%, p=0.8667) and live birth rate (48.84% vs. 55.81%, p=0.6659) between the SERa+ oocyte group and the matched group. No congenital birth defects were found in the two groups. CONCLUSION Our results suggest that the implantation, clinical pregnancy, live birth and birth defects rate of embryos derived from oocytes with SERa are not impaired.
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Ozturk S. Selection of competent oocytes by morphological criteria for assisted reproductive technologies. Mol Reprod Dev 2020; 87:1021-1036. [PMID: 32902927 DOI: 10.1002/mrd.23420] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 07/17/2020] [Accepted: 08/22/2020] [Indexed: 02/06/2023]
Abstract
Invasive and noninvasive methods are commonly used to select developmentally competent oocytes that can improve the take-home baby rates in assisted reproductive technology (ART) centers. One of the noninvasive methods conventionally utilized to determine competent oocytes is the morphological analysis of cumulus complex, first polar body, zona pellucida, perivitelline space, meiotic spindle, and ooplasm. Successful fertilization, early embryo development, uterine implantation, and healthy pregnancy depend on the quality of oocytes, and morphological evaluation is one of the options used to predict quality levels. In this review, the morphological criteria being utilized in certain ART centers are comprehensively evaluated with special references to their predictive values and potential contributions to selecting high-quality oocytes.
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Affiliation(s)
- Saffet Ozturk
- Department of Histology and Embryology, Akdeniz University School of Medicine, Antalya, Turkey
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Jans V, Dondorp W, Bonduelle M, de Die C, Mertes H, Pennings G, de Wert G. Follow-up in the field of reproductive medicine: an ethical exploration. Reprod Biomed Online 2020; 41:1144-1150. [PMID: 32967810 DOI: 10.1016/j.rbmo.2020.08.033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 08/18/2020] [Accepted: 08/23/2020] [Indexed: 10/23/2022]
Abstract
RESEARCH QUESTION What ethical implications, issues and concerns play a role in conducting follow-up studies of children born after assisted reproductive technologies (ART)? DESIGN Literature study and relevant experiences of academic medical centres in Brussels, Belgium, and Maastricht, the Netherlands were used to identify and analyse the most pertinent ethical implications, issues and concerns. RESULTS According to recommendations from the European Society of Human Reproduction and Embryology, follow-up (ideally long term) of children conceived through medically assisted reproduction (MAR) should be an integral part of introducing new ART. With potentially risky new ART on the horizon, these recommendations need to be taken more seriously. Apart from practical barriers, such as funding, challenges for follow-up include securing active involvement of families of children conceived through MAR, starting with parents of young children, and ideally involving consenting adolescents and adults during a large part of their lives, possibly even into the next generation. CONCLUSIONS From an ethical viewpoint, the most pertinent issues include the proportionality of the inevitable burdens and risks for families of children conceived through MAR, and the implications of the principle of respect for autonomy. The proportionality requirement is most critical when it concerns incompetent children, who should not be included in research with more than minimal burdens and risks if there is no reasonable expectation of benefit for themselves. With respect for autonomy, we argue that, when seeking voluntary consent for participating in follow-up studies that meet the condition of proportionality, professionals may encourage members of families of children conceived through MAR to partake in follow-up research.
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Affiliation(s)
- Verna Jans
- Department of Health, Ethics and Society Maastricht University, Postbus 616, Maastricht 6200 MD, The Netherlands.
| | - Wybo Dondorp
- Department of Health, Ethics and Society Maastricht University, Postbus 616, Maastricht 6200 MD, The Netherlands
| | - Maryse Bonduelle
- Center for Medical Genetics, Universitair Ziekenhuis Brussel (UZ Brussel), Laarbeeklaan 101, Brussels (Jette) 1090, Belgium
| | - Christine de Die
- Department of Clinical Genetics, Research School GROW for Oncology and Developmental Biology, Maastricht University Medical Center, Postbus 5800, Maastricht 6202 AZ, the Netherlands
| | - Heidi Mertes
- Department of Philosophy and Moral Sciences, Faculty of Arts and Philosophy, Ghent University, Blandijnberg 2, Ghent B-9000, Belgium
| | - Guido Pennings
- Department of Philosophy and Moral Sciences, Faculty of Arts and Philosophy, Ghent University, Blandijnberg 2, Ghent B-9000, Belgium
| | - Guido de Wert
- Department of Health, Ethics and Society Maastricht University, Postbus 616, Maastricht 6200 MD, The Netherlands
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Udagawa O, Ishihara N. Mitochondrial dynamics and interorganellar communication in the development and dysmorphism of mammalian oocytes. J Biochem 2019; 167:257-266. [DOI: 10.1093/jb/mvz093] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 10/30/2019] [Indexed: 12/25/2022] Open
Abstract
AbstractMitochondria play many critical roles in cells, not only by supplying energy, but also by supplying metabolites, buffering Ca2+ levels and regulating apoptosis. During oocyte maturation and subsequent embryo development, mitochondria change their morphology by membrane fusion and fission, and coordinately undergo multiple cellular events with the endoplasmic reticulum (ER) closely apposed. Mitochondrial fusion and fission, known as mitochondrial dynamics, are regulated by family members of dynamin GTPases. Oocytes in animal models with these regulators artificially altered exhibit morphological abnormalities in nearby mitochondria and at the ER interface that are reminiscent of major cytoplasmic dysmorphisms in human assisted reproductive technology, in which a portion of mature oocytes retrieved from patients contain cytoplasmic dysmorphisms associated with mitochondria and ER abnormal morphologies. Understanding organelle morpho-homeostasis in oocytes obtained from animal models will contribute to the development of novel methods for determining oocyte health and for how to deal with dysmorphic oocytes.
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Affiliation(s)
- Osamu Udagawa
- Center for Health and Environmental Risk Research, Integrated Health Risk Research Section, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Naotada Ishihara
- Department of Biological Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- Department of Protein Biochemistry, Institute of Life Science, Kurume University, 67 Asahi, Kurume, Fukuoka 830-0011, Japan
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