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de Medeiros Garcia Torres M, Lanza DCF. A Standard Pipeline for Analyzing the Endometrial Microbiome. Reprod Sci 2024; 31:2163-2173. [PMID: 38720154 DOI: 10.1007/s43032-024-01557-0] [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: 10/17/2023] [Accepted: 04/11/2024] [Indexed: 07/31/2024]
Abstract
The endometrial microbiome is a rapidly advancing field of research, particularly in obstetrics and gynecology, as it has been found to be linked with obstetric complications and potential impacts on fertility. The diversity of microorganisms presents in the endometrium, along with their metabolites, can influence reproductive outcomes by modulating the local immune environment of the uterus. However, a major challenge in advancing our understanding of the endometrial microbiota lies in the heterogeneity of available studies, which vary in terms of patient selection, control groups, collection methods and analysis methodologies. In this study, we propose a detailed pipeline for endometrial microbiome analysis, based on the most comprehensive prospective of 64 studies that have investigated the endometrial microbiome up to the present. Additionally, our review suggests that a dominance of Lactobacilli in the endometrium may be associated with improved reproductive prognosis, including higher implantation rates and lower miscarriage rates. By establishing a standardized pipeline, we aim to facilitate future research, enabling better comparison and correlation of bacterial communities with the health status of patients, including fertility-related issues.
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Tian Q, Jin S, Zhang G, Liu Y, Liu J, Tang X, Li Y, Liu J, Liu Y, Wang Z. Assessing vaginal microbiome through Vaginal Microecology Evaluation System as a predictor for in vitro fertilization outcomes: a retrospective study. Front Endocrinol (Lausanne) 2024; 15:1380187. [PMID: 39045277 PMCID: PMC11263289 DOI: 10.3389/fendo.2024.1380187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2024] [Accepted: 06/25/2024] [Indexed: 07/25/2024] Open
Abstract
Objective This study aims to evaluate the effectiveness of the Vaginal Microecology Evaluation System (VMES) in assessing the dynamics of the vaginal microbiome (VM) throughout the process of in vitro fertilization and embryo transfer (IVF-ET). Furthermore, it seeks to explore the potential correlation between distinct types of VM ecology and the success rate of IVF-ET. Methods This study employed VMES to ascertain the composition of the VM. Data were collected from infertile women who underwent their initial IVF-ET treatment for tubal factor between January 2018 and December 2021. A retrospective analysis of pregnancy outcomes resulting from their fresh embryo transfer was conducted to determine the predictive significance of the vaginal microenvironment. Results We demonstrate that VMES is able to predict IVF-ET outcomes in patients diagnosed with Bacterial Vaginosis (BV). Notably, a discernible shift in the VM was observed in a decent subset of patients following Controlled Ovarian Stimulation (COS), though this phenomenon was not universal across all participants. Specifically, there was a noteworthy increase in the proportion of patients exhibiting BV and uncharacterized dysbiosis subsequent to COS. Furthermore, our investigation revealed a significant correlation between VM and both the live birth rate and early miscarriage rate. Employing a multivariable logistic regression model, we identified that VM status pre-COS, VM status post-COS, patient age, and the number of embryos transferred emerged as independent predictors of the live birth rate. Conclusion Our study suggests that, during IVF-ET treatment, the VMES can effectively detect changes in the VM, which are strongly correlated with the pregnancy outcome of IVF-ET procedures.
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Affiliation(s)
- Quan Tian
- Department of Genetics and Cell Biology, Basic Medical College, Qingdao University, Qingdao, Shandong, China
- Department of Reproductive Medicine, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Shengxi Jin
- Department of Genetics and Cell Biology, Basic Medical College, Qingdao University, Qingdao, Shandong, China
| | - Guangmin Zhang
- Department of Genetics and Cell Biology, Basic Medical College, Qingdao University, Qingdao, Shandong, China
| | - Yujie Liu
- Department of Reproductive Medicine, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Jianxin Liu
- Department of Reproductive Medicine, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Xiuming Tang
- Department of Reproductive Medicine, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Yufeng Li
- Department of Reproductive Medicine, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Jiane Liu
- Department of Genetics and Cell Biology, Basic Medical College, Qingdao University, Qingdao, Shandong, China
- Department of Reproductive Medicine, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Yifei Liu
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Pennsylvania State Hershey Medical Center, Hershey, PA, United States
| | - Zheng Wang
- Department of Genetics and Cell Biology, Basic Medical College, Qingdao University, Qingdao, Shandong, China
- Department of Reproductive Medicine, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
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van den Tweel MM, van den Munckhof EHA, van der Zanden M, Molijn A, van Lith JMM, Boers KE. The Vaginal Microbiome Changes During Various Fertility Treatments. Reprod Sci 2024; 31:1593-1600. [PMID: 38379070 PMCID: PMC11111482 DOI: 10.1007/s43032-024-01484-0] [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: 10/20/2023] [Accepted: 02/07/2024] [Indexed: 02/22/2024]
Abstract
This study aimed to investigate the influence of hormonal treatment on the vaginal microbiome during fertility treatments. Bacterial vaginosis (BV) could affect fecundity, particularly in the in vitro fertilization (IVF) population, where negative effects on pregnancy outcomes have been reported. It is hypothesized that the hormone treatment during fertility treatments could influence the abundance of Lactobacilli, with negative effects on the pregnancy results. A total of 53 couples attending a fertility clinic in the Netherlands between July 2019 and August 2022 were included in this prospective cohort study. Vaginal samples were collected at start of treatment, oocyte retrieval or insemination from subjects undergoing intra uterine insemination (IUI) with mild ovarian stimulation, and IVF or intra cytoplasmatic sperm injection (ICSI) with controlled ovarian hyperstimulation. AmpliSens® Florocenosis/Bacterial vaginosis-FRT qPCR and 16S rRNA gene-based amplicon sequencing were performed on all samples. In total, 140 swabs were analyzed, with a median of two swabs per person. 33 (24%) tested qPCR BV positive. Lactobacilli percentage decreased during fertility treatments, leading to changes in the vaginal microbiome. Shannon diversity index was not significantly different. Of the total of 53 persons, nine switched from qPCR BV negative to positive during treatment. The persons switching to qPCR BV positive had already a (not significant) higher Shannon diversity index at start of treatment. If the vaginal microbiome of persons deteriorates during fertility treatments, timing of following treatments, lifestyle modifications, or a freeze all strategy could be of possible benefit.
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Affiliation(s)
- M M van den Tweel
- Department of Obstetrics and Gynaecology, Leiden University Medical Center, Leiden, The Netherlands
- Department of Obstetrics and Gynaecology, Haaglanden Medical Center, Bronovolaan 5, 2597, AX, The Hague, The Netherlands
| | | | - M van der Zanden
- Department of Obstetrics and Gynaecology, Haaglanden Medical Center, Bronovolaan 5, 2597, AX, The Hague, The Netherlands
| | - A Molijn
- Eurofins NMDL-LCPL, Rijswijk, The Netherlands
| | - J M M van Lith
- Department of Obstetrics and Gynaecology, Leiden University Medical Center, Leiden, The Netherlands
| | - K E Boers
- Department of Obstetrics and Gynaecology, Haaglanden Medical Center, Bronovolaan 5, 2597, AX, The Hague, The Netherlands.
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杨 晓, 蔡 雪, 唐 洁, 黄 译, 吴 蔓, 刘 恺, 陈 颖, 孙 艳. [Analysis of Reproductive Tract Microecological Changes During the Frozen-Thawed Embryo Transfer Cycle and Clinical Pregnancy Outcomes]. SICHUAN DA XUE XUE BAO. YI XUE BAN = JOURNAL OF SICHUAN UNIVERSITY. MEDICAL SCIENCE EDITION 2024; 55:596-604. [PMID: 38948288 PMCID: PMC11211780 DOI: 10.12182/20240560509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Indexed: 07/02/2024]
Abstract
Objective This study aims to analyze the relationship between reproductive tract microecological changes, metabolic differences, and pregnancy outcomes at different time points in the frozen-thawed embryo transfer cycle while patients are undergoing hormone replacement therapy, which will be a breakthrough point for improving outcomes. Methods A total of 20 women undergoing frozen-thawed single blastocyst transfer for the first time at the Reproductive Medicine Center of Fujian Maternal and Child Health Hospital between July 2022 and January 2023 were recruited for this study. Their vaginal and cervical secretions were collected for 16S rRNA sequencing and non-targeted metabolomics analysis on days 2-5 of menstruation, day 7 after estrogen replacement therapy started, the day when progesterone was added, and the day of transplantation. The subjects were divided into different groups according to their clinical pregnancy status and the sequencing results were analyzed using bioinformatics methods. Results 1) The alpha-diversity index of the vaginal and cervical microbiota was higher on days 2-5 of menstruation (P<0.01), but did not differ significantly on day 7 after oral estrogen replacement therapy started, the day of progesterone administration, and the day of transplantation (P≥0.1). 2) Both the pregnant group and the non-pregnant group showed a variety of microorganisms and metabolites with significant differences in the lower reproductive tract at different time points. 3) Microbial analysis at different time points showed that there were significant differences in vaginal flora, including Peptoniphilus, Enterocloster, Finegoldia, Klebsiella, Anaerobutyricum, Agathobaculum, Sporanaerobacter, Bilophila, Prevotella, and Anaerococcus in the pregnant group (P<0.05). 4) Metabolite analysis at different time points showed that there were significant differences in 3-hydroxybenzoic acid, linatine, (R)-amphetamine, hydroxychloroquine, and L-altarate in the vaginal secretions of the pregnant group (P<0.05), and that there were significant differences in isocitric acid, quassin, citrinin, and 12(R)-HETE in the cervical secretions (P<0.05). 5) Metabolite analysis at different time points showed that, in the non-pregnant group, there were significant differences in linatine, decanoyl-L-carnitine, aspartame, sphingosine, and hydroxychloroquine in the vaginal secretions (P<0.05), and the isocitric acid, quassin, ctrinin, and 12(R)-HETE in the cervical secretions (P<0.05). 6) Combined microbiome and metabolomics analysis showed that certain metabolites were significantly associated with microbial communities, especially Klebsiella. Conclusions Significant differences in the microbiota genera and metabolites at different time points were found during the frozen-embryo transfer cycle of hormone replacement therapy, which may be used as potential biomarkers to predict pregnancy outcomes of embryo transfer.
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Affiliation(s)
- 晓慧 杨
- 福建医科大学妇儿临床医学院 (福州 350001)College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou 350001, China
| | - 雪芬 蔡
- 福建医科大学妇儿临床医学院 (福州 350001)College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou 350001, China
- 福建省妇幼保健院,福建医科大学妇儿临床医学院 (福州 350001)Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou 350001, China
| | - 洁玲 唐
- 福建医科大学妇儿临床医学院 (福州 350001)College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou 350001, China
| | - 译 黄
- 福建医科大学妇儿临床医学院 (福州 350001)College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou 350001, China
| | - 蔓 吴
- 福建医科大学妇儿临床医学院 (福州 350001)College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou 350001, China
| | - 恺钰 刘
- 福建医科大学妇儿临床医学院 (福州 350001)College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou 350001, China
| | - 颖睿 陈
- 福建医科大学妇儿临床医学院 (福州 350001)College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou 350001, China
| | - 艳 孙
- 福建医科大学妇儿临床医学院 (福州 350001)College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou 350001, China
- 福建省妇幼保健院,福建医科大学妇儿临床医学院 (福州 350001)Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou 350001, China
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Banchi P, Spanoghe L, Maes D, Morrell J, Van Soom A. The reproductive microbiome in dogs: Friend or foe? Vet J 2024; 304:106100. [PMID: 38484870 DOI: 10.1016/j.tvjl.2024.106100] [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: 11/20/2023] [Revised: 03/04/2024] [Accepted: 03/07/2024] [Indexed: 03/18/2024]
Abstract
The microbiome of the reproductive tract is an area of research in full development. Specifically, the microbiome may be involved in reproductive health, disease, and pregnancy outcomes, as has been shown in humans and animals, including dogs. The aim of the present review was to summarize current knowledge on the microbiome of the canine reproductive tract, to expose the controversial role that some bacterial agents may play in canine subfertility, and to highlight future research perspectives. This review discussed whether the use of antimicrobials in dogs is appropriate to increase reproductive performance and to treat subfertility without proper diagnosis, and the possible use of probiotics to modulate the reproductive canine microbiome. Finally, we indicate areas in which scientific knowledge is currently lacking, and could be promising directions for future research.
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Affiliation(s)
- Penelope Banchi
- Department of Internal Medicine, Reproduction and Population Medicine, Ghent University, Merelbeke 9820, Belgium; Department of Veterinary Sciences, University of Turin, Grugliasco 10095, Italy.
| | - Lotte Spanoghe
- Department of Internal Medicine, Reproduction and Population Medicine, Ghent University, Merelbeke 9820, Belgium
| | - Dominiek Maes
- Department of Internal Medicine, Reproduction and Population Medicine, Ghent University, Merelbeke 9820, Belgium
| | - Jane Morrell
- Department of Clinical Sciences, Swedish University of Agricultural Sciences (SLU), Uppsala 75007, Sweden
| | - Ann Van Soom
- Department of Internal Medicine, Reproduction and Population Medicine, Ghent University, Merelbeke 9820, Belgium
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Bai M, Sun D, Shu J, Wei D, Yuan M, Yuan Z, Liu S, Kang M, Zhang Z, Chen X, Zheng W, Feng Y, Bao S, Zhang Z, Liao H. Assisted reproductive technology treatment failure and the detection of intrauterine HPV through spent embryo transfer media sample. J Med Virol 2024; 96:e29468. [PMID: 38415499 DOI: 10.1002/jmv.29468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 01/02/2024] [Accepted: 01/30/2024] [Indexed: 02/29/2024]
Abstract
Cervical human papillomavirus (HPV) infection is believed to increase the risks of pregnancy failure and abortion, however, whether the uterine cavity HPV infection reduces pregnancy rate or increases miscarriage rate remains unclarified in infertile women undergoing assisted reproductive technology (ART) treatment. Therefore, we aimed to assess ART outcomes in the presence of intrauterine HPV. This was a hospital-based multicenter (five reproductive medicine centers) matched cohort study. This study involved 4153 infertile women undergoing in vitro fertilization (IVF) or intracytoplasmic sperm injection treatment in five reproductive medicine centers between October 2018 and 2020. The spent embryo transfer media sample with endometrium tissue were collected and performed with flow-through hybridization and gene chips to detect HPV DNA. According to basic characteristics, HPV-positive and negative patients were matched in a ratio of 1:4 by age, body mass index transfer timing, transfer type, and number of embryos transferred. The primary outcome was pregnancy and clinical miscarriage rates in the transfer cycle underwent HPV detection. 92 HPV-positive and 368 HPV-negative patients were screened and analyzed statistically. Univariate analysis showed uterine cavity HPV infection resulted in lower rates of ongoing pregnancy (31.5% vs. 44.6%; p = 0.023), implantation (32.3% vs. 43.1%; p = 0.026), biochemical pregnancy (47.8% vs. 62.5%; p = 0.010), and clinical pregnancy (40.2% vs. 54.3%; p = 0.015) compared with HPV negative group. The infertile female with positive HPV also had a slightly higher frequency of biochemical miscarriage (15.9% vs. 13.0%; p = 0.610) and clinical miscarriage (24.3% vs. 15.5%; p = 0.188). These findings suggest that HPV infection in the uterine cavity is a high risk for ART failure. HPV screening is recommended before ART treatment, which may be benefit to improving pregnancy outcome.
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Affiliation(s)
- Mingzhu Bai
- Reproductive Medicine Center, Department of Obstertrics and Gynecology, Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
- Center for Reproductive Medicine, Maternal and Child Health Hospital in Xuzhou, Xuzhou Medical University, Xuzhou, China
| | - Di Sun
- Department of Obstetrics and Gynecology, Reproductive Medicine Center, Shanghai General Hospital, Shanghai Jiaotong University, Shanghai, China
- School of Medicine, Center for Reproductive Medicine & Fertility Preservation Program, International Peace Maternity and Child Health Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Jinhui Shu
- Center for Reproductive Medicine, Maternal and Child Health Hospital in Guangxi, Guangxi, China
| | - Dong Wei
- Center for Reproductive Medicine, Liuzhou Worker's Hospital, Liuzhou, China
| | - Mu Yuan
- Center for Reproductive Medicine, Maternal and Child Health Hospital in Xuzhou, Xuzhou Medical University, Xuzhou, China
| | - Zhenya Yuan
- Center for Reproductive Medicine, Maternal and Child Health Hospital in Xuzhou, Xuzhou Medical University, Xuzhou, China
| | - Suying Liu
- Center for Reproductive Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Mei Kang
- Center of Clinical Research, Shanghai General Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Zikai Zhang
- Reproductive Medicine Center, Department of Obstertrics and Gynecology, Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Xiong Chen
- Department of Obstetrics and Gynecology, Shanghai Wusong Hospital, Shanghai, China
| | - Wenxin Zheng
- Department of Pathology and Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
- Harold C. Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Youji Feng
- Department of Obstetrics and Gynecology, Reproductive Medicine Center, Shanghai General Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Shihua Bao
- Department of Reproductive Immunology, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
| | - Zhenbo Zhang
- Reproductive Medicine Center, Department of Obstertrics and Gynecology, Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Renji Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Hong Liao
- Department of Laboratory Medicine, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
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Rokhsartalab Azar P, Karimi S, Haghtalab A, Taram S, Hejazi M, Sadeghpour S, Pashaei MR, Ghasemnejad-Berenji H, Taheri-Anganeh M. The role of the endometrial microbiome in embryo implantation and recurrent implantation failure. J Reprod Immunol 2024; 162:104192. [PMID: 38215650 DOI: 10.1016/j.jri.2024.104192] [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: 10/16/2023] [Revised: 12/21/2023] [Accepted: 01/01/2024] [Indexed: 01/14/2024]
Abstract
There is a suggested pathophysiology associated with endometrial microbiota in cases where repeated implantation failure of high-quality embryos is observed. However, there is a suspected association between endometrial microbiota and the pathogenesis of implantation failure. However, there is still a lack of agreement on the fundamental composition of the physiological microbiome within the uterine cavity. This is primarily due to various limitations in the studies conducted, including small sample sizes and variations in experimental designs. As a result, the impact of bacterial communities in the endometrium on human reproduction is still a subject of debate. In this discourse, we undertake a comprehensive examination of the existing body of research pertaining to the uterine microbiota and its intricate interplay with the process of embryo implantation.
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Affiliation(s)
| | - Sarmad Karimi
- Student Research Committee, Urmia University of Medical Sciences, Urmia, Iran
| | - Arian Haghtalab
- Student Research Committee, Urmia University of Medical Sciences, Urmia, Iran
| | - Saman Taram
- Student Research Committee, Urmia University of Medical Sciences, Urmia, Iran
| | - Milad Hejazi
- Student Research Committee, Urmia University of Medical Sciences, Urmia, Iran
| | - Sonia Sadeghpour
- Reproductive Health Research Center, Clinical Research Institute, Urmia University of Medical Sciences, Urmia, Iran; Department of Obstetrics and Gynecology, School of Medicine, Urmia University of Medical Sciences, Urmia, Iran
| | - Mohammad Reza Pashaei
- Department of Internal Medicine, School of Medicine, Urmia University of Medical Sciences, Urmia, Iran
| | - Hojat Ghasemnejad-Berenji
- Reproductive Health Research Center, Clinical Research Institute, Urmia University of Medical Sciences, Urmia, Iran.
| | - Mortaza Taheri-Anganeh
- Cellular and Molecular Research Center, Cellular and Molecular Medicine Research Institute, Urmia University of Medical Sciences, Urmia, Iran.
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Lüll K, Org E. Uterine Microbiome: Does the Sampling Technique Matter? Semin Reprod Med 2023; 41:144-150. [PMID: 38065552 DOI: 10.1055/s-0043-1777361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
Studies have proven the significance of microbial communities in various parts of the human body for health. In recent years it has been discovered that the uterine cavity is not sterile, and endometrium has its own microbiome which appears to have an impact on female fertility and gynecological pathologies. Lactobacillus has shown to dominate the microbial profile in the uterus and is considered an indicator of a healthy uterine environment. Yet, many argue that the Lactobacillus dominance is due to vaginal contamination during the sampling process. To date there is no clearly defined healthy endometrial microbial profile, which is largely due to the fact that determining the microbial community from the endometrium is complicated, and there is currently no consensus on sampling methods for the endometrial microbiome. As a result, this restricts ability to replicate discoveries made in other cohorts. Here we aim to give an overview of the sampling methods used and discuss what impedes the endometrial microbiome studies as well as how to reach a consensus on the study design. This knowledge could be incorporated into the future research and the knowledge on endometrial microbiome could be included into the diagnostics and treatment of female reproductive health.
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Affiliation(s)
- Kreete Lüll
- Institute of Genomics, Estonian Genome Centre, University of Tartu, Tartu, Estonia
| | - Elin Org
- Institute of Genomics, Estonian Genome Centre, University of Tartu, Tartu, Estonia
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Doroftei B, Ilie OD, Armeanu T, Stoian IL, Anton N, Babici RG, Ilea C. A Narrative Review Discussing the Obstetric Repercussions Due to Alterations of Personalized Bacterial Sites Developed within the Vagina, Cervix, and Endometrium. J Clin Med 2023; 12:5069. [PMID: 37568471 PMCID: PMC10419759 DOI: 10.3390/jcm12155069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/19/2023] [Accepted: 07/25/2023] [Indexed: 08/13/2023] Open
Abstract
BACKGROUND The reproductive tract microbiota that evolved as an integrative component has been studied intensively in the last decade. As a result, novel research, clinical opportunities, and perspectives have been derived following the close investigation of this microecological environment. This has paved the way for an update to and improvement of the management strategies and therapeutic approaches. However, obscurities, contradictions, and controversies arise regarding the ascension route from the vagina to the endometrium via the cervix, with finality in adverse obstetric outcomes. METHODS Starting from these considerations, we aimed to gather all existing data and information from four major academic databases (PubMed, ISI Web of Knowledge, Scopus, and ScienceDirect) published in the last 13 years (2010-2023) using a controlled vocabulary and dedicated terminology to enhance the coverage, identification, and sorting of potentially eligible studies. RESULTS Despite the high number of returned entries (n = 804), only a slight percentage (2.73%) of all manuscripts were deemed eligible following two rounds of evaluation. Cumulatively, a low level of Lactobacillus spp. and of other core microbiota members is mandatory, with a possible eubiosis-to-dysbiosis transition leading to an impairment of metabolic and endocrine network homeostasis. This transposes into a change in the pro-inflammatory landscape and activation of signaling pathways due to activity exerted by the bacterial lipopolysaccharides (LPSs)/endotoxins that further reflect a high risk of miscarriage in various stages. While the presence of some pathogenic entities may be suggestive of an adverse obstetric predisposition, there are still pros and cons of the role of specific strains, as only the vagina and cervix have been targeted as opposed to the endometrium, which recently started to be viewed as the key player in the vagina-cervix-endometrium route. Consequently, based on an individual's profile, diet, and regime, antibiotics and probiotics might be practical or not. CONCLUSIONS Resident bacteria have a dual facet and are beneficial for women's health, but, at the same time, relaying on the abundance, richness, and evenness that are definitory indexes standing as intermediaries of a miscarriage.
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Affiliation(s)
- Bogdan Doroftei
- Faculty of Medicine, University of Medicine and Pharmacy “Grigore T. Popa”, University Street No. 16, 700115 Iasi, Romania
- Clinical Hospital of Obstetrics and Gynecology “Cuza Voda”, Cuza Voda Street No. 34, 700038 Iasi, Romania
- Origyn Fertility Center, Palace Street No. 3C, 700032 Iasi, Romania
| | | | - Theodora Armeanu
- Faculty of Medicine, University of Medicine and Pharmacy “Grigore T. Popa”, University Street No. 16, 700115 Iasi, Romania
- Clinical Hospital of Obstetrics and Gynecology “Cuza Voda”, Cuza Voda Street No. 34, 700038 Iasi, Romania
- Origyn Fertility Center, Palace Street No. 3C, 700032 Iasi, Romania
| | - Irina-Liviana Stoian
- Faculty of Medicine, University of Medicine and Pharmacy “Grigore T. Popa”, University Street No. 16, 700115 Iasi, Romania
| | - Nicoleta Anton
- Faculty of Medicine, University of Medicine and Pharmacy “Grigore T. Popa”, University Street No. 16, 700115 Iasi, Romania
| | - Ramona-Geanina Babici
- Department of Genetics, University of Medicine and Pharmacy “Grigore T. Popa”, University Street No. 16, 700115 Iasi, Romania
| | - Ciprian Ilea
- Faculty of Medicine, University of Medicine and Pharmacy “Grigore T. Popa”, University Street No. 16, 700115 Iasi, Romania
- Clinical Hospital of Obstetrics and Gynecology “Cuza Voda”, Cuza Voda Street No. 34, 700038 Iasi, Romania
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Thanaboonyawat I, Pothisan S, Petyim S, Laokirkkiat P. Pregnancy outcomes after vaginal probiotic supplementation before frozen embryo transfer: a randomized controlled study. Sci Rep 2023; 13:11892. [PMID: 37482568 PMCID: PMC10363539 DOI: 10.1038/s41598-023-39078-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 07/19/2023] [Indexed: 07/25/2023] Open
Abstract
In women receiving assisted reproductive treatment, intrauterine lactobacilli dominance has been associated with higher rates of pregnancy achievement. This randomized controlled trial conducted in the fertility clinic of the university hospital from 7 August 2019 to May 2021, aimed to compare the clinical outcome of embryo transfer in frozen-thaw cycles with Lactobacillus supplementation prior to embryo transfer and the standard treatment. A total of 340 infertile women underwent randomization. The biochemical and clinical pregnancy rates were comparable between the groups (39.9 and 34.2% in the study group vs. 41.8 and 31.7% in the control group); however, the miscarriage rate was significantly decreased in the study group (9.5 vs. 19.1%, respectively, p = 0.02), [OR = 0.44, 95% CI (0.23, 0.86)]. Among 49 women diagnosed with bacterial vaginosis, the live birth rate in the study group was higher than the control group (42.31 vs. 26.09%, p = 0.23), [OR = 2.08, 95% CI (0.62, 6.99)]. In the blastocyst transfer group (n = 206), the live birth rate was significantly higher in the study group than in the control group (35.71 vs. 22.22%, p = 0.03) [OR = 1.9, 95% CI (1.05, 3.59)]. Therefore, intravaginal lactobacilli supplementation before embryo transfer in the frozen-thaw cycle did not improve the biochemical and clinical pregnancy rate in the general population but significantly reduced the miscarriage rate.Trial Registration: TCTR20190429001 (29/04/2019) @ www.thaiclinicaltrials.org .
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Affiliation(s)
- Isarin Thanaboonyawat
- Infertility Unit, Department of Obstetrics and Gynecology, Faculty of Medicine, Siriraj Hospital, Mahidol University, 2 Wanglang Road, Siriraj, Bangkoknoi, Bangkok, 10700, Thailand.
| | - Sootthinan Pothisan
- Infertility Unit, Department of Obstetrics and Gynecology, Faculty of Medicine, Siriraj Hospital, Mahidol University, 2 Wanglang Road, Siriraj, Bangkoknoi, Bangkok, 10700, Thailand
| | - Somsin Petyim
- Infertility Unit, Department of Obstetrics and Gynecology, Faculty of Medicine, Siriraj Hospital, Mahidol University, 2 Wanglang Road, Siriraj, Bangkoknoi, Bangkok, 10700, Thailand
| | - Pitak Laokirkkiat
- Infertility Unit, Department of Obstetrics and Gynecology, Faculty of Medicine, Siriraj Hospital, Mahidol University, 2 Wanglang Road, Siriraj, Bangkoknoi, Bangkok, 10700, Thailand
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11
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Colella M, Topi S, Palmirotta R, D'Agostino D, Charitos IA, Lovero R, Santacroce L. An Overview of the Microbiota of the Human Urinary Tract in Health and Disease: Current Issues and Perspectives. Life (Basel) 2023; 13:1486. [PMID: 37511861 PMCID: PMC10381901 DOI: 10.3390/life13071486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 06/09/2023] [Accepted: 06/23/2023] [Indexed: 07/30/2023] Open
Abstract
This article is intended to deepen our knowledge to date regarding the functions of the resident microbiota/microbiome in the urinary system for human health and disease. First, we sought to report the general characteristics (composition and stability) of the normal urinary system microbiota in the different anatomical sites in relation to some factors such as the effect of age, gender and diet, analyzing in detail the functions and the composition of the microbiota in the light of current knowledge. Several pieces of evidence suggest the importance of preserving the micro-ecosystem of the urinary system, and in some cases their relationship with diseases is important for maintaining human health is well understood. The female and male reproductive microbiota have mainly been studied over the past decade. In the past, the arrest was thought to have taken place in a sterile environment. Microorganisms of the microbiota form biofilms, three-dimensional structures, that differ in the reproductive organs and interact with both gametes and the embryo as well as with maternal tissues. These biofilms from the reproductive system also interact with others, such as that of the gastrointestinal tract. Reduction in its diversity intestinal microbiota can disrupt estrogen metabolism and affect the reproductive microbiota. It is therefore understood that its quantitative and qualitative identification is important for microbiota, but also the study of the structures formed by the microorganisms. A dysbiosis with local or systemic causes can lead to serious diseases. The role of probiotics in maintaining microbial population harmony (eubiosis) and preventing certain pathologies of the urinary and reproductive system was also investigated. A negative variation in the qualitative and quantitative composition of certain strains of microorganisms (dysbiosis) due to local or systemic causes can even lead to serious diseases. The role of probiotics in maintaining the healthy balance of microorganism populations (eubiosis), and thus in the prevention of certain pathologies of the urinary and reproductive system, has also been studied.
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Affiliation(s)
- Marica Colella
- Microbiology and Virology Unit, Interdisciplinary Department of Medicine, University of Bari "Aldo Moro", Piazza G. Cesare, 11, 70124 Bari, Italy
| | - Skender Topi
- Department of Clinical Disciplines, School of Technical Medical Sciences, University of Elbasan "A. Xhuvani", 3001 Elbasan, Albania
| | - Raffaele Palmirotta
- Microbiology and Virology Unit, Interdisciplinary Department of Medicine, University of Bari "Aldo Moro", Piazza G. Cesare, 11, 70124 Bari, Italy
| | - Donato D'Agostino
- Department of Clinical Disciplines, School of Technical Medical Sciences, University of Elbasan "A. Xhuvani", 3001 Elbasan, Albania
| | - Ioannis Alexandros Charitos
- Respiratory Rehabilitation Unit, Clinical Scientific Institutes Maugeri (IRCCS), Section of Bari, 70124 Bari, Italy
| | - Roberto Lovero
- AOU Policlinico Consorziale di Bari-Ospedale Giovanni XXIII, Clinical Pathology Unit, Policlinico University Hospital of Bari, 70124 Bari, Italy
| | - Luigi Santacroce
- Microbiology and Virology Unit, Interdisciplinary Department of Medicine, University of Bari "Aldo Moro", Piazza G. Cesare, 11, 70124 Bari, Italy
- Department of Clinical Disciplines, School of Technical Medical Sciences, University of Elbasan "A. Xhuvani", 3001 Elbasan, Albania
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12
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Carosso AR, Brunod N, Filippini C, Revelli A, Evangelisti B, Cosma S, Borella F, Canosa S, Benedetto C, Gennarelli G. Reproductive and Obstetric Outcomes Following a Natural Cycle vs. Artificial Endometrial Preparation for Frozen-Thawed Embryo Transfer: A Retrospective Cohort Study. J Clin Med 2023; 12:4032. [PMID: 37373725 PMCID: PMC10299226 DOI: 10.3390/jcm12124032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 06/07/2023] [Accepted: 06/08/2023] [Indexed: 06/29/2023] Open
Abstract
Background: The proportion of frozen embryo transfer cycles has consistently grown in recent decades. Some adverse obstetric outcomes after frozen embryo transfer could possibly be explained by different approaches in endometrial preparation. The aim of the present study was to investigate reproductive and obstetric outcomes after frozen embryo transfer, comparing different endometrial preparation strategies. Methods: This retrospective study included 317 frozen embryo transfer cycles, of which 239 had a natural or modified natural cycle and 78 underwent artificial endometrial preparation. After excluding late abortion and twin pregnancies, the outcomes of 103 pregnancies were analyzed, 75 of which were achieved after a natural cycle/modified natural cycle, and 28 were achieved after an artificial cycle. Results: The overall clinical pregnancy rate/embryo transfer was 39.7%, the miscarriage rate was 10.1%, and the live birth rate/embryo transfer was 32.8%, without significant differences in reproductive outcomes between natural/modified cycle and artificial cycle groups. The risks of pregnancy-induced hypertension and abnormal placental insertion were significantly increased in pregnancies achieved after the artificial preparation of the endometrium (p = 0.0327 and =0.0191, respectively). Conclusions: Our study encourages the use of a natural cycle or modified natural cycle for endometrial preparation for frozen embryo transfer in order to ensure the presence of a corpus luteum able to orchestrate maternal adaptation to pregnancy.
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Affiliation(s)
- Andrea Roberto Carosso
- Obstetrics and Gynecology 1U, Physiopathology of Reproduction and IVF Unit, Department of Surgical Sciences, Sant’Anna Hospital, University of Torino, 10124 Turin, Italy
| | - Nicole Brunod
- Obstetrics and Gynecology 1U, Physiopathology of Reproduction and IVF Unit, Department of Surgical Sciences, Sant’Anna Hospital, University of Torino, 10124 Turin, Italy
| | - Claudia Filippini
- Department of Surgical Sciences, Clinical Statistics, University of Torino, 10124 Turin, Italy
| | - Alberto Revelli
- Obstetrics and Gynecology 2U, Department of Surgical Sciences, Sant’Anna Hospital, University of Torino, 10124 Turin, Italy
| | - Bernadette Evangelisti
- Obstetrics and Gynecology 1U, Physiopathology of Reproduction and IVF Unit, Department of Surgical Sciences, Sant’Anna Hospital, University of Torino, 10124 Turin, Italy
| | - Stefano Cosma
- Obstetrics and Gynecology 1U, Physiopathology of Reproduction and IVF Unit, Department of Surgical Sciences, Sant’Anna Hospital, University of Torino, 10124 Turin, Italy
| | - Fulvio Borella
- Obstetrics and Gynecology 1U, Physiopathology of Reproduction and IVF Unit, Department of Surgical Sciences, Sant’Anna Hospital, University of Torino, 10124 Turin, Italy
| | - Stefano Canosa
- Obstetrics and Gynecology 1U, Physiopathology of Reproduction and IVF Unit, Department of Surgical Sciences, Sant’Anna Hospital, University of Torino, 10124 Turin, Italy
| | - Chiara Benedetto
- Obstetrics and Gynecology 1U, Physiopathology of Reproduction and IVF Unit, Department of Surgical Sciences, Sant’Anna Hospital, University of Torino, 10124 Turin, Italy
| | - Gianluca Gennarelli
- Obstetrics and Gynecology 1U, Physiopathology of Reproduction and IVF Unit, Department of Surgical Sciences, Sant’Anna Hospital, University of Torino, 10124 Turin, Italy
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13
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Evans GE, Mahajan V, Wakeman S, Slatter T, Ponnampalam AP, Anderson TP, Sarwar M, Evans JJ. A pilot study using unique targeted testing of the urogenital microbiome has potential as a predictive test during IVF for implantation outcome. Arch Gynecol Obstet 2023; 307:1957-1967. [PMID: 36905424 PMCID: PMC10147757 DOI: 10.1007/s00404-023-06987-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 02/21/2023] [Indexed: 03/12/2023]
Abstract
PURPOSE This pilot study aimed to develop a methodology characterising the urogenital microbiome as a predictive test in the IVF workup. METHODS Using unique custom qPCRs, we tested for the presence of specific microbial species from vaginal samples and First Catch Urines from the male. The test panel included a range of potential urogenital pathogens, STIs, 'favourable bacteria' (Lactobacillus spp.) and 'unfavourable bacteria' (anaerobes) reported to influence implantation rates. We tested couples attending Fertility Associates, Christchurch, New Zealand for their first round of IVF. RESULTS We found that some microbial species affected implantation. The qPCR result was interpreted qualitatively using the Z proportionality test. Samples from women at the time of Embryo Transfer who did not achieve implantation had significantly higher percent of samples that were positive for Prevotella bivia and Staphylococcus aureus compared to women who did achieve implantation. DISCUSSION The results provide evidence that most other microbial species chosen for testing had little functional effect on implantation rates. The addition of further microbial targets (yet to be determined) could be combined in this predictive test for vaginal preparedness on the day of embryo transfer. This methodology has a substantial advantage of being affordable and easily performed in any routine molecular laboratory. This methodology is most suitable as a foundation on which to develop a timely test of microbiome profiling. Using the indicators detected to have a significant influence, these results can be extrapolated. CONCLUSION Using a rapid antigen test, a woman can self-sample prior to embryo transfer and obtain an indication of microbial species present which could influence implantation outcome.
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Affiliation(s)
- Gloria E Evans
- Department of Obstetrics and Gynaecology, University of Auckland, 85 Park Road, Grafton, Auckland, 1023, New Zealand.
| | - Vishakha Mahajan
- Liggins Institute, University of Auckland, Auckland, New Zealand
| | | | - Tania Slatter
- Department of Pathology, University of Otago, Dunedin, New Zealand
| | - Anna P Ponnampalam
- Department of Obstetrics and Gynaecology, University of Auckland, 85 Park Road, Grafton, Auckland, 1023, New Zealand.,Liggins Institute, University of Auckland, Auckland, New Zealand
| | | | - Makhdoom Sarwar
- Department of Obstetrics and Gynaecology, University of Otago, Christchurch, New Zealand
| | - John J Evans
- Department of Obstetrics and Gynaecology, University of Otago, Christchurch, New Zealand
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14
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Inversetti A, Zambella E, Guarano A, Dell’Avanzo M, Di Simone N. Endometrial Microbiota and Immune Tolerance in Pregnancy. Int J Mol Sci 2023; 24:ijms24032995. [PMID: 36769318 PMCID: PMC9917440 DOI: 10.3390/ijms24032995] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/20/2023] [Accepted: 02/01/2023] [Indexed: 02/05/2023] Open
Abstract
Recent studies have demonstrated that the uterus has its own microbiota. However, there is no consensus on endometrial microbiota composition, thus its role in the healthy uterine environment is still a frontier topic. Endometrial receptivity is key to embryo implantation, and in this specific context immunological tolerance against fetal antigens and the tightly regulated expression of inflammatory mediators are fundamental. According to recent evidence, endometrial microbiota may interact in a very dynamic way with the immune system during the peri-conceptional stage and later during pregnancy. For this reason, a condition of dysbiosis might lead to adverse pregnancy outcomes. The aim of this review is to summarize the evidence on the molecular mechanisms by which the endometrial microbiota may interact with the immune system. For this purpose, the link between dysbiosis and reproductive disorders, such as infertility, recurrent pregnancy loss (RPL), and preterm birth, will be discussed. In conclusion, the most recent findings from molecular analyses will be reported to illustrate and possibly overcome the intrinsic limitations of uterine microbiota detection (low endometrial biomass, high risk of contamination during sampling, and lack of standardization).
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Affiliation(s)
- Annalisa Inversetti
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, Pieve Emanuele, 20072 Milan, Italy
- IRCCS Humanitas Research Hospital, Via Manzoni 56, Rozzano, 20089 Milan, Italy
| | - Enrica Zambella
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, Pieve Emanuele, 20072 Milan, Italy
| | - Alice Guarano
- Humanitas San Pio X, Via Francesco Nava 31, 20159 Milan, Italy
| | | | - Nicoletta Di Simone
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, Pieve Emanuele, 20072 Milan, Italy
- IRCCS Humanitas Research Hospital, Via Manzoni 56, Rozzano, 20089 Milan, Italy
- Correspondence:
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15
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Tsai H, Tsui K, Chiu Y, Wang L. Adverse effect of lactobacilli-depauperate cervicovaginal microbiota on pregnancy outcomes in women undergoing frozen-thawed embryo transfer. Reprod Med Biol 2023; 22:e12495. [PMID: 36699957 PMCID: PMC9853465 DOI: 10.1002/rmb2.12495] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 11/03/2022] [Accepted: 12/07/2022] [Indexed: 01/22/2023] Open
Abstract
Purpose The cervicovaginal microbiota is essential for maintaining the health of the female reproductive tract. However, whether cervicovaginal microbiota status prior to frozen embryo transfer (FET) associates with pregnancy outcomes is largely unexplored. Methods Cervical mucus from 29 women who had undergone FET was collected. Microbial composition was analyzed using 16 S rRNA gene sequence to assess the correlation to the pregnancy outcomes. Results CST-categorized Lactobacillus was the most dominant (41.71%) in the pregnant group, while CST-IV-based and BV-related Gardnerella (34.96%) prevailed in the non-pregnant group. The average abundance of Gardnerella compared non-pregnant to pregnant women was the highest (34.96% vs. 4.22%, p = 0.0015) among other CST-IV indicator bacteria. Multivariate analysis revealed that CST-IV-related bacteria have a significantly adverse effect on ongoing pregnancy outcomes (odds ratio, 0.083; 95% confidence index, 0.012-0.589, p = 0.013*). Conclusions The study found that the CST-IV microbiota, with significantly increasing Gardnerella and the loss of Lactobacilli as the dominant bacteria, can potentially contribute to pregnancy failure. Therefore, dysbiotic microbiota may be a risk factor in women undergoing FET. Assessing the health of the cervicovaginal microbiota prior to FET would enable couples to make a more thoughtful decision on the timing and might improve pregnancy outcomes.
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Affiliation(s)
- Hsiao‐Wen Tsai
- Department of Obstetrics and GynecologyKaohsiung Veterans General HospitalKaohsiungTaiwan,Department of Obstetrics and GynecologySchool of Medicine, National Yang‐Ming UniversityTaipeiTaiwan,Institute of Biopharmaceutical SciencesNational Sun Yat‐Sen UniversityKaohsiungTaiwan
| | - Kuan‐Hao Tsui
- Department of Obstetrics and GynecologyKaohsiung Veterans General HospitalKaohsiungTaiwan,Institute of Biopharmaceutical SciencesNational Sun Yat‐Sen UniversityKaohsiungTaiwan
| | - Yu‐Che Chiu
- Department of Marine Biotechnology and ResourcesNational Sun Yat‐Sen UniversityKaohsiungTaiwan
| | - Liang‐Chun Wang
- Department of Marine Biotechnology and ResourcesNational Sun Yat‐Sen UniversityKaohsiungTaiwan
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16
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Fujii S, Oguchi T. Age- and endometrial microbiota-related delay in development of endometrial receptivity. Reprod Med Biol 2023; 22:e12523. [PMID: 37383030 PMCID: PMC10298046 DOI: 10.1002/rmb2.12523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 06/01/2023] [Accepted: 06/20/2023] [Indexed: 06/30/2023] Open
Abstract
Purpose We evaluated factors affecting the development of endometrial receptivity according to age and changes in the endometrial microbiota. Methods We recruited patients with infertility who underwent transcriptomic analyses of endometrial receptivity and the endometrial microbiome prior to frozen embryo transfer. An endometrial biopsy was performed 108 h after initial progesterone administration. Results In 185 tests from 185 eligible patients, the results of endometrial receptivity analysis were receptive in 111 (60.0%) patients and pre-receptive in 74 (40.0%) patients. Compared with receptive patients, pre-receptive patients had significantly older ages (36.0 ± 0.5 vs. 38.2 ± 0.5, p = 0.0021), a smaller proportion of normal Lactobacillus-dominant microbiota (27.9% vs. 12.2%), and a greater proportion of microbiota with ultralow biomass (22.5% vs. 41.9%) (p = 0.0074). Patient age (adjusted odds ratio: 1.08, 95% confidence interval: 1.01-1.16, p = 0.0351) and a microbiome with ultralow biomass (adjusted odds ratio: 3.82, 95% confidence interval: 1.49-9.82, p = 0.0039) were independent predictive factors for pre-receptive endometrium. Conclusions Older age was accompanied by a decrease in Lactobacillus-dominant microbiota; aging and endometrial microbiota with ultralow biomass were significantly associated with pre-receptive endometrium. Our findings suggest that the quantity (rather than proportion) of Lactobacillus in the endometrium is important in the development of endometrial receptivity.
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17
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Ikechebelu JI, Dim CC, Eleje GU, Joe-Ikechebelu N, Okpala BC, Okam PC. A randomised control trial on oral dydrogesterone versus micronized vaginal progesterone pessary for luteal phase support in in vitro fertilization cycles. J Med Life 2023; 16:62-69. [PMID: 36873122 PMCID: PMC9979184 DOI: 10.25122/jml-2022-0131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 10/28/2022] [Indexed: 03/07/2023] Open
Abstract
This study aimed to evaluate the pregnancy rates, adverse reactions, and medication costs of two luteal phase support regimens: oral dydrogesterone and micronized vaginal progesterone (MVP) pessary in in vitro fertilization cycles. A randomized open-label trial with participants randomly assigned to either 400 mg MVP twice daily or 10 mg dydrogesterone three times daily. The primary endpoints were pregnancy rates, and the secondary endpoints included tolerance, miscarriage rates, and medication cost. Per-protocol principle analysis was performed. The baseline characteristics of the 162 participants were similar. Dydrogesterone had statistically similar (p>0.05) positive pregnancy test rates fifteen days post embryo transfer (35.8% vs. 32.7%), clinical pregnancy rates at the gestational age of 6 weeks (32.1% vs. 28.8%), ongoing pregnancy rates (26.4% vs. 23.1%) and miscarriage rates at 14 weeks of gestation (9.2% vs. 9.4%) and safety profile to MVP. Dydrogesterone was better tolerated as vaginal itching was significantly more prevalent in the MVP arm (p=0.008). Dydrogesterone is significantly less expensive than MVP pessary. Oral dydrogesterone and MVP pessary had similar pregnancy rates and adverse effects. Dydrogesterone appears more user-friendly and less expensive in cases of luteal-phase support in in vitro fertilization cycles.
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Affiliation(s)
- Joseph Ifeanyichukwu Ikechebelu
- Department of Obstetrics and Gynaecology, Faculty of Medicine, College of Health Sciences, Nnamdi Azikiwe University, Awka, Nigeria.,Life Fertility Centre, Life International Hospital, Awka, Nigeria.,Institute of Maternal and Child Health, College of Medicine, University of Nigeria, Ituku-Ozalla, Enugu, Nigeria
| | - Cyril Chukwudi Dim
- Institute of Maternal and Child Health, College of Medicine, University of Nigeria, Ituku-Ozalla, Enugu, Nigeria.,Department of Obstetrics and Gynaecology, College of Medicine, University of Nigeria, Ituku-Ozalla, Enugu, Nigeria
| | - George Uchenna Eleje
- Department of Obstetrics and Gynaecology, Faculty of Medicine, College of Health Sciences, Nnamdi Azikiwe University, Awka, Nigeria.,Institute of Maternal and Child Health, College of Medicine, University of Nigeria, Ituku-Ozalla, Enugu, Nigeria
| | - Ngozi Joe-Ikechebelu
- Life Fertility Centre, Life International Hospital, Awka, Nigeria.,Department of Community Medicine & Primary Health Care, College of Medicine, Chukwuemeka Odumegwu Ojukwu University, Awka, Nigeria
| | - Boniface Chukwuneme Okpala
- Department of Obstetrics and Gynaecology, Faculty of Medicine, College of Health Sciences, Nnamdi Azikiwe University, Awka, Nigeria.,Life Fertility Centre, Life International Hospital, Awka, Nigeria
| | - Princeston Chukwuemeka Okam
- Life Fertility Centre, Life International Hospital, Awka, Nigeria.,Department of Pharmacology & Therapeutics, Faculty of Basic Clinical Sciences, College of Health Sciences, Nnamdi Azikiwe University, Awka, Nigeria
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ELhelw EM, El Serour AGEA, Rady MS, Abdeltawab A. Freeze-all policy versus luteal phase support with low dose of human chorionic gonadotrophin for high-responder patients undergoing intracytoplasmic sperm injection on pregnancy outcomes: a retrospective cohort observational study. MIDDLE EAST FERTILITY SOCIETY JOURNAL 2022. [DOI: 10.1186/s43043-022-00113-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
The literature has always controversies on the use of freeze-all policy in high-responder women performing intracytoplasmic sperm injection. In this article, we discuss the benefits of freeze-all policy on the incidence of pregnancy outcomes and the complications.
The main body of abstract
Freeze-all policy is applied to the intracytoplasmic sperm injection program by freezing of all embryos and delaying embryo transfer to another subsequent ovarian cycle, to decrease the incidence of ovarian hyperstimulation syndrome, especially in high-responder women. Unfortunately, freeze-all policy is correlated with an increase in the economic costs and more ICSI laboratory effort. Delayed embryo transfer (ET) is correlated with more anxiety among the patients. An alternative strategy is to perform fresh embryo transfer with more intensive luteal phase support to compensate for the negative effect of the GnRH agonist on the endometrial receptivity and luteal phase support.
Short conclusion
The freeze-all policy had better pregnancy rates with less incidence of moderate to severe hyperstimulation syndrome compared with original fresh embryo transfer in high-responder women performing intracytoplasmic sperm injection.
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19
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Eggersmann TK, Hamala N, Graspeuntner S, Rupp J, Griesinger G. Das intrauterine Mikrobiom – Schrödingers Katze der Reproduktionsmedizin. GYNAKOLOGISCHE ENDOKRINOLOGIE 2022. [DOI: 10.1007/s10304-022-00469-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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20
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Wang W, Feng D, Ling B. Biologia Futura: endometrial microbiome affects endometrial receptivity from the perspective of the endometrial immune microenvironment. Biol Futur 2022; 73:291-300. [DOI: 10.1007/s42977-022-00134-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 08/03/2022] [Indexed: 11/25/2022]
Abstract
AbstractThe existence of Lactobacillus-led colonized bacteria in the endometrium of a healthy human has been reported in recent studies. Unlike the composition of the microbiome in the lower genital tract, that in the endometrium is different and closely associated with the physiological and pathological processes of gynecological diseases. For example, changing the immune microenvironment affects the receptivity of the endometrium, thereby leading to abnormal reproductive outcomes, such as embryo implantation failure and recurrent spontaneous abortion. However, the concrete functions and mechanisms of the endometrial microbiome have not been studied thoroughly. This review elaborates the research progress on the mechanisms by which the endometrial microbiome affects endometrial receptivity from the perspective of endometrial immune microenvironment regulation. Considering the lack of a unified evaluation method for the endometrial microbiome, as well as the lack of an optimal treatment protocol against recurrent spontaneous abortion, we also discussed the application of combining antibiotics with probiotics/prebiotics as precautionary measures.
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21
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The relationship between vaginal pH and bacterial vaginosis as diagnosed using qPCR in an asymptomatic subfertile population. Arch Gynecol Obstet 2022; 306:1787-1793. [PMID: 36083500 DOI: 10.1007/s00404-022-06764-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 08/19/2022] [Indexed: 11/02/2022]
Abstract
PURPOSE Bacterial vaginosis (BV) is a dysbiosis of the vaginal microbiome and a condition found in 20-30% of all women. Literature describing the possible link between BV and subfertility is increasing. Newer techniques such as quantitative polymerase chain reactions (qPCR) detect BV more accurately than traditional methods but come with high costs. The association between pH and BV as diagnosed using traditional methods is well-established in a symptomatic population. This study is the first to investigate the association between pH and BV diagnosed by qPCR in an asymptomatic subfertile population and to examine the usefulness of pH as a means of cost reduction. METHODS Data of 170 pH-qPCR combinations were used from a prospective cohort study examining bacterial vaginosis in a subfertile population. 102 women received a vaginal swab and pH measurement at baseline and subsequent advanced reproductive technology (ART) treatments. The swabs are analysed using the AmpliSens®Florocenosis/Bacterial vaginosis-FRT qPCR kit. RESULTS pH is strongly associated with BV as diagnosed by qPCR (OR 3.06, p = 0.000, CI 1.65-5.68). The cut-off point for pH ≥ 4.7 maximised diagnostic performance [AUC 0.74 (CI 0.66-0.83), sensitivity 76%] and reduced costs by 60%. CONCLUSION This study shows that the vaginal pH for a multi-ethnic, asymptomatic population of women attending fertility clinics is strongly associated with BV qPCR outcome. Using the cut-off of pH of 4.7 has a high sensitivity for diagnosis of BV by qPCR and can be achieved at a cost reduction of 60%.
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Bednarska-Czerwińska A, Czerwiński M, Morawiec E, Łach A, Ziaja A, Kusaj A, Strączyńska P, Sagan D, Boroń D, Grabarek BO. Marking the Profile of the Microflora of the Endometrium and Uterine Cervix in Women as a Potential Factor Determining the Effectiveness of In Vitro Fertilization. J Clin Med 2022; 11:jcm11123348. [PMID: 35743414 PMCID: PMC9224746 DOI: 10.3390/jcm11123348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 06/06/2022] [Accepted: 06/09/2022] [Indexed: 02/01/2023] Open
Abstract
One promising research trend involves evaluating the influence of microbiota in the reproductive system of women on becoming pregnant and maintaining pregnancy. The goal of this study was to define the microflora profile of the endometrium and uterine cervix in women qualified for an in vitro fertilization (IVF) procedure, which is expected to contribute to increasing the percentage of successful IVF implantations. Based on the conducted molecular analysis in the collected swabs, 22 bacterial strains were identified. Eleven strains (57%) that were isolated belong to the physiological microflora, the most common strain of which was Lactobacillus. Eight of the isolated strains (33%) were pathological microflora, among which the most common bacteria were from the Enterobacteriaceae family (which includes E. coli, Shigella, and Salmonella). Finally, three of the bacterial strains (10%) may be a component of both physiological or pathological microflora of the vagina: Bifidobacterium breve, Bifidobacterium longum group, and Alloscardovia omnicolens. The presence of Escherichia coli was detected in six women, Staphylococcus aureus also in six patients, Atopobium parvulum in three, Streptococcus salivarius group in three, Enterococcus faecalis in four, and Aerococcus christensenii in two patients. We found statistically significant relationships (p < 0.05) between Lactobacillus fermentum and Enterococcus faecalis, Lactobacillus delbrueckii and Escherichia coli groups, Lactobacillus FN667084_s and Staphylococcus aureus groups, as well as Lactobacillus fermentum and Streptococcus agalactiae. Based on the conducted study, it may be confirmed that the endometrium is, to a large extent, colonized by lactic acid bacilli. Apart from that, endometrial dysbiosis was not noted in patients qualified for the IVF procedure.
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Affiliation(s)
- Anna Bednarska-Czerwińska
- Gyncentrum Fertility Clinic, 40-121 Katowice, Poland; (M.C.); (E.M.); (P.S.); (B.O.G.)
- Faculty of Medicine, University of Technology, Academy of Silesia in Katowice, 41-800 Zabrze, Poland
- American Medical Clinic, 40-600 Katowice, Poland
- Correspondence:
| | - Michał Czerwiński
- Gyncentrum Fertility Clinic, 40-121 Katowice, Poland; (M.C.); (E.M.); (P.S.); (B.O.G.)
- Faculty of Medicine, University of Technology, Academy of Silesia in Katowice, 41-800 Zabrze, Poland
- American Medical Clinic, 40-600 Katowice, Poland
| | - Emilia Morawiec
- Gyncentrum Fertility Clinic, 40-121 Katowice, Poland; (M.C.); (E.M.); (P.S.); (B.O.G.)
- Department of Histology, Cytophysiology and Embryology, Faculty of Medicine, University of Technology, Academy of Silesia in Katowice, 41-800 Zabrze, Poland; (A.Ł.); (A.Z.); (A.K.); (D.B.)
- Department of Microbiology, Faculty of Medicine, University of Technology, Academy of Silesia in Katowice, 41-800 Zabrze, Poland
| | - Aleksandra Łach
- Department of Histology, Cytophysiology and Embryology, Faculty of Medicine, University of Technology, Academy of Silesia in Katowice, 41-800 Zabrze, Poland; (A.Ł.); (A.Z.); (A.K.); (D.B.)
| | - Anna Ziaja
- Department of Histology, Cytophysiology and Embryology, Faculty of Medicine, University of Technology, Academy of Silesia in Katowice, 41-800 Zabrze, Poland; (A.Ł.); (A.Z.); (A.K.); (D.B.)
| | - Adrian Kusaj
- Department of Histology, Cytophysiology and Embryology, Faculty of Medicine, University of Technology, Academy of Silesia in Katowice, 41-800 Zabrze, Poland; (A.Ł.); (A.Z.); (A.K.); (D.B.)
| | - Patrycja Strączyńska
- Gyncentrum Fertility Clinic, 40-121 Katowice, Poland; (M.C.); (E.M.); (P.S.); (B.O.G.)
- Department of Microbiology, Faculty of Medicine, University of Technology, Academy of Silesia in Katowice, 41-800 Zabrze, Poland
- Department of Gynecology, Obstetrics and Oncological Gynecology in Bytom, Medical University of Silesia in Katowice, 41-902 Bytom, Poland
| | - Dorota Sagan
- Medical Center Dormed Medical SPA, 28-105 Busko-Zdroj, Poland;
| | - Dariusz Boroń
- Department of Histology, Cytophysiology and Embryology, Faculty of Medicine, University of Technology, Academy of Silesia in Katowice, 41-800 Zabrze, Poland; (A.Ł.); (A.Z.); (A.K.); (D.B.)
- Department of Gynaecology and Obstetrics, Faculty of Medicine, University of Technology, Academy of Silesia in Katowice, 41-800 Zabrze, Poland
- Department of Gynecology and Obstetrics with Gynecologic Oncology, Ludwik Rydygier Memorial Specialized Hospital, 31-826 Kraków, Poland
- Department of Gynecology and Obstetrics, TOMMED Specjalisci od Zdrowia, 40-662 Katowice, Poland
| | - Beniamin Oskar Grabarek
- Gyncentrum Fertility Clinic, 40-121 Katowice, Poland; (M.C.); (E.M.); (P.S.); (B.O.G.)
- Department of Histology, Cytophysiology and Embryology, Faculty of Medicine, University of Technology, Academy of Silesia in Katowice, 41-800 Zabrze, Poland; (A.Ł.); (A.Z.); (A.K.); (D.B.)
- Department of Gynaecology and Obstetrics, Faculty of Medicine, University of Technology, Academy of Silesia in Katowice, 41-800 Zabrze, Poland
- Department of Gynecology and Obstetrics with Gynecologic Oncology, Ludwik Rydygier Memorial Specialized Hospital, 31-826 Kraków, Poland
- Department of Gynecology and Obstetrics, TOMMED Specjalisci od Zdrowia, 40-662 Katowice, Poland
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23
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Cessot M, Salle B, Labrune E, Walter O, Benchaib M, Fraison E. [Comparison of oral dydrogesterone with micronized vaginal progesterone in fresh embryo transfert in IVF/ICSI]. GYNECOLOGIE, OBSTETRIQUE, FERTILITE & SENOLOGIE 2022; 50:462-469. [PMID: 35288366 DOI: 10.1016/j.gofs.2022.03.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 01/16/2022] [Accepted: 03/06/2022] [Indexed: 06/14/2023]
Abstract
INTRODUCTION Luteal insufficiency corresponds to a progesterone deficiency affecting women who receive treatment for in vitro fertilization (IVF). Different routes of progesterone administration exist and have varying degrees of acceptability to patients. The aim of this study was to compare two luteal phase support (LPS) treatments: oral dydrogesterone versus micronized vaginal progesterone on the clinical pregnancy occurrence after fresh embryo transfer. MATERIAL AND METHODS This study was a monocentric historical and observational cohort study carried out in the reproductive medicine department at the University Hospital, Femme Mère Enfant in Lyon. All the data were collected retrospectively. Women between 18 and 43 years old, who completed an IVF cycle with or without ICSI, followed by fresh embryo transfer on the second or third day after oocyte retrieval (D2 or D3) or at the blastocyst stage (D5 or D6) between July 2019 and July 2020 were included. The 290 patients included between July 2019 and January 2020 received 600mg per day of PMV. The 290 patients in the OD group included between January and July 2020 received 30mg OD per day. RESULTS In the univariate analysis, the clinical pregnancy occurrence per transfer was comparable between the MVP and OD groups (P>0.05) (OR [95% CI]): 0.904 [0.630 ; 1.296]. In the multivariate analysis, OD also appeared to be associated with a similar pregnancy occurrence compared to MVP, with a non-significant difference (OR [95% CI]): 0.940 [0.640; 1.380]. The use of OD compared to MVP did not significantly influence the clinical pregnancy occurrence in any age group. There was no significant difference between the two groups in the clinical pregnancy occurrence, whether the patients belonged to the reference population of the center or not (P>0.05) (OR [95% CI]): 2.367 [0.568; 3.568]. CONCLUSION This important French retrospective study confirms the safety and efficacy of OD.
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Affiliation(s)
- M Cessot
- Hospices Civils de Lyon, hôpital mère enfant, service de médecine de la reproduction, 59, boulevard Pinel, Bron, France
| | - B Salle
- Hospices Civils de Lyon, hôpital mère enfant, service de médecine de la reproduction, 59, boulevard Pinel, Bron, France; Université Claude-Bernard, faculté de médecine Lyon Sud, 165, chemin du Petit Revoyet, Oullins, France; INSERM Unité 1208, 18, avenue Doyen Lépine, Bron, France
| | - E Labrune
- Hospices Civils de Lyon, hôpital mère enfant, service de médecine de la reproduction, 59, boulevard Pinel, Bron, France; Université Claude-Bernard, faculté de médecine Lyon Sud, 165, chemin du Petit Revoyet, Oullins, France; INSERM Unité 1208, 18, avenue Doyen Lépine, Bron, France
| | - O Walter
- Service de médecine interne, hôpital Purpan, Centre Hospitalier universitaire de Toulouse, France
| | - M Benchaib
- Hospices Civils de Lyon, hôpital mère enfant, service de médecine de la reproduction, 59, boulevard Pinel, Bron, France; Université Claude-Bernard, faculté de médecine Lyon Sud, 165, chemin du Petit Revoyet, Oullins, France; INSERM Unité 1208, 18, avenue Doyen Lépine, Bron, France
| | - E Fraison
- Hospices Civils de Lyon, hôpital mère enfant, service de médecine de la reproduction, 59, boulevard Pinel, Bron, France; INSERM Unité 1208, 18, avenue Doyen Lépine, Bron, France; Université Claude-Bernard, faculté de médecine Laennec, 7, rue Guillaume-Paradin, Lyon, France.
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24
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Microbiome as a predictor of implantation. Curr Opin Obstet Gynecol 2022; 34:122-132. [PMID: 35645010 DOI: 10.1097/gco.0000000000000782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW Review the latest research on the female urogenital microbiome as a predictor of successful implantation. RECENT FINDINGS Lactobacillus crispatus seems to be beneficial species in a healthy female genital tract, although the presence of anaerobic bacteria and their impact has yet to be determined. The vaginal microbiome is associated with assisted reproductive technology (ART) outcome in terms of successful implantation and pregnancy. Approaches restoring a dysbiotic vaginal microbiome seem promising. It is questionable if a unique endometrial microbiome exists, given the low bacterial biomass, the invasiveness of endometrial sampling, and its associated high contamination risk. Future studies should focus on the whole microbiome using proteomics and metabolomics, as well as the virome to get a more holistic understanding of its role in reproduction. SUMMARY The vaginal and endometrial compartments are being studied to determine a healthy and unhealthy microbiome composition. Defining a healthy composition could provide insight into physiological processes related to the success of embryo implantation. The vaginal microbiome is easily accessible and its composition can be reliably assessed and can be associated with ART outcome. The existence of an endometrial or uterine microbiome is still debated, due to the combination of low biomass and unavoidable high risk of contamination during sampling.
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25
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Reschini M, Benaglia L, Ceriotti F, Borroni R, Ferrari S, Castiglioni M, Guarneri D, Porcaro L, Vigano' P, Somigliana E, Uceda Renteria S. Endometrial microbiome: sampling, assessment, and possible impact on embryo implantation. Sci Rep 2022; 12:8467. [PMID: 35589752 PMCID: PMC9120179 DOI: 10.1038/s41598-022-12095-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 05/05/2022] [Indexed: 11/08/2022] Open
Abstract
There is growing interest on the potential clinical relevance of the endometrial microbiome. However, insufficient attention has been given to the methodology of sampling. To minimize contamination, we advocate the use of the double-lumen catheters commonly employed for the embryo transfer. Endometrial fluid samples obtained from 53 women scheduled for IVF were studied for microbiome characterization. Control samples from the vagina of these same women were concomitantly obtained. Samples were analysed by V3-V4-V6 regions of 16S rRNA gene sequencing with Next Generation Sequencing technique. Endometrial Lactobacillus-dominant cases were uncommon compared to previous evidence, being observed in only 4 (8%) women. Taxonomy markedly differed between the endometrial and vaginal microbiomes composition. The most common bacterial genera coincided in only 4 (8%) women. The comparison between women who did and did not subsequently become pregnant failed to identify any microorganism associated with the success of the procedure. However, the endometrial biodiversity resulted higher among pregnant women. Shannon's Equitability index in pregnant and non pregnant women was 0.76 [0.57-0.87] and 0.55 [0.51-0.64], respectively (p = 0.002). In conclusion, the use of embryo transfer catheters for testing the endometrial microbiome is promising. The scant concordance with vaginal samples supports the validity of this approach. Moreover, our study highlighted a possible beneficial role of a higher biodiversity on endometrial receptivity.
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Affiliation(s)
- Marco Reschini
- Infertility Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Via M. Fanti, 6, 20122, Milan, Italy.
| | - Laura Benaglia
- Infertility Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Via M. Fanti, 6, 20122, Milan, Italy
| | - Ferruccio Ceriotti
- Dept of Clinical Sciences and Community Health, Università Degli Studi Di Milano, Milan, Italy
- Virology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Raffaella Borroni
- Infertility Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Via M. Fanti, 6, 20122, Milan, Italy
| | - Stefania Ferrari
- Infertility Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Via M. Fanti, 6, 20122, Milan, Italy
| | - Marta Castiglioni
- Infertility Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Via M. Fanti, 6, 20122, Milan, Italy
- Dept of Clinical Sciences and Community Health, Università Degli Studi Di Milano, Milan, Italy
| | - Davide Guarneri
- Virology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Luigi Porcaro
- Medical Genetics Laboratory, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Paola Vigano'
- Infertility Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Via M. Fanti, 6, 20122, Milan, Italy
| | - Edgardo Somigliana
- Infertility Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Via M. Fanti, 6, 20122, Milan, Italy
- Dept of Clinical Sciences and Community Health, Università Degli Studi Di Milano, Milan, Italy
| | - Sara Uceda Renteria
- Virology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
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26
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Vomstein K, Reider S, Böttcher B, Watschinger C, Kyvelidou C, Tilg H, Moschen AR, Toth B. Uterine microbiota plasticity during the menstrual cycle: Differences between healthy controls and patients with recurrent miscarriage or implantation failure. J Reprod Immunol 2022; 151:103634. [PMID: 35550495 DOI: 10.1016/j.jri.2022.103634] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 04/12/2022] [Accepted: 04/26/2022] [Indexed: 10/18/2022]
Abstract
In contrast to the former notion of a sterile womb, sequencing techniques have proven a bacterial colonization of the uterus. However, timing of microbiota analysis regarding possible intra-cycle variations as well as specific alterations in patients with recurrent miscarriage (RM) or recurrent implantation failure (RIF) remain unknown. In total, n = 20 RM-, n = 20 RIF-patients and n = 10 healthy controls were included in this prospective study. In every subject, uterine flushing was performed during follicular, ovulatory and luteal phase. Bacterial DNA was isolated and 16S amplicon sequencing analysis of the V3-V4 region was carried out. Diversity measures were compared between samples from the disease groups and the control group separately for each timepoint of the menstrual cycle and over time. In the control group a significant decrease of species richness and evenness was shown around ovulation which remained at this lower level during the luteal phase (Shannon index), indicating a more uniform distribution of microbiota (p < 0.05). This loss of diversity during the menstrual cycle was not apparent in RIF and RM patients. A higher similarity was seen in taxonomic distribution between RM and RIF patients compared to the control group. Longitudinal dynamics included increases in Firmicutes (controls and RM only) and a concomitant loss of Proteobacteria in controls that was not present in RIF and RM. We demonstrate longitudinal intra-cycle-dependent changes in the endometrial microbiota of healthy controls. An increased diversity in both patient groups could be the cause or consequence of a micro-environment that is more prone to pregnancy failures.
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Affiliation(s)
- Kilian Vomstein
- Department of Gynecological Endocrinology and Reproductive Medicine, Medical University of Innsbruck, Anichstrasse 35, 6020 Innsbruck, Austria
| | - Simon Reider
- Christian Doppler Laboratory for Mucosal Immunology, Faculty of Medicine, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz, Austria; Department of Medicine, Division of Internal Medicine I (Gastroenterology, Hepatology, Endocrinology, and Metabolism), Medical University of Innsbruck, Anichstrasse 35, 6020 Innsbruck, Austria; Department of Internal Medicine, Kepler University Hospital Gmbh, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz and Krankenhausstrasse 9, 4020 Linz, Austria.
| | - Bettina Böttcher
- Department of Gynecological Endocrinology and Reproductive Medicine, Medical University of Innsbruck, Anichstrasse 35, 6020 Innsbruck, Austria
| | - Christina Watschinger
- Christian Doppler Laboratory for Mucosal Immunology, Faculty of Medicine, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz, Austria; Department of Internal Medicine, Kepler University Hospital Gmbh, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz and Krankenhausstrasse 9, 4020 Linz, Austria
| | - Christiana Kyvelidou
- Department of Gynecological Endocrinology and Reproductive Medicine, Medical University of Innsbruck, Anichstrasse 35, 6020 Innsbruck, Austria
| | - Herbert Tilg
- Department of Medicine, Division of Internal Medicine I (Gastroenterology, Hepatology, Endocrinology, and Metabolism), Medical University of Innsbruck, Anichstrasse 35, 6020 Innsbruck, Austria
| | - Alexander R Moschen
- Christian Doppler Laboratory for Mucosal Immunology, Faculty of Medicine, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz, Austria; Department of Medicine, Division of Internal Medicine I (Gastroenterology, Hepatology, Endocrinology, and Metabolism), Medical University of Innsbruck, Anichstrasse 35, 6020 Innsbruck, Austria; Department of Internal Medicine, Kepler University Hospital Gmbh, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz and Krankenhausstrasse 9, 4020 Linz, Austria
| | - Bettina Toth
- Department of Gynecological Endocrinology and Reproductive Medicine, Medical University of Innsbruck, Anichstrasse 35, 6020 Innsbruck, Austria
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27
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Yang H, Gao C, Wang X, Qiu F, Wei M, Xia F. Associations between vaginal flora, MIP-1α, IL-17A, and clinical pregnancy rate in AIH. Am J Reprod Immunol 2022; 88:e13543. [PMID: 35357057 DOI: 10.1111/aji.13543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 03/22/2022] [Accepted: 03/23/2022] [Indexed: 11/29/2022] Open
Abstract
PROBLEM To investigate how asymptomatic bacterial imbalance affects the clinical pregnancy rate after artificial insemination with the husband's semen (AIH). METHODS This study included married heterosexual couples who underwent AIH. According to the follow-up results, participants were divided into the pregnancy and non-pregnancy groups. Based on the first 10 pair participants in each group with vaginal flora bacterial 16S rRNA sequencing results, six semen samples received bacterial-sperm mixed test. Moreover, 34 cytokines were detected in the peripheral blood sera of the first three pairs by high-throughput Luminex, which were verified in vaginal secretions, cervical mucus, and blood sera from the first 200 pairs by ELISA. RESULTS The results of the 16S sequencing of vaginal secretions showed that compared with the pregnant group, the non-pregnant group had a significantly increased bacterial species diversity, which was mainly manifested by a decrease in Lactobacillus crispatus and an increase in Prevotella bivia. When Prevotella bivia or Lactobacillus crispatus were mixed with sperms, the sperm motility was decreased (p < .05). The vaginal posterior fornix secretions, cervical mucus, and peripheral blood sera of the non-pregnant group showed decreased levels of MIP-1α and increased levels of IL-17A (p < .05). CONCLUSION The imbalance of vaginal flora leading to the increase of Prevotella bivia and the decrease of Lactobacillus crispatus may cause an imbalance of immune regulation. Low expression of MIP-1α and high expression of IL-17A were associated with reduced clinical pregnancy rate in AIH.
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Affiliation(s)
- Hui Yang
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, P.R. China.,Department of Gynecology and Obstetrics, Huaian Maternal and Child Health Care Hospital, Huai'an, Jiangsu, P.R. China
| | - Chengzhen Gao
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, P.R. China
| | - Xia Wang
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, P.R. China
| | - Fenglong Qiu
- Department of Gynecology and Obstetrics, Huaian Maternal and Child Health Care Hospital, Huai'an, Jiangsu, P.R. China
| | - Mian Wei
- Department of Gynecology and Obstetrics, Huaian Maternal and Child Health Care Hospital, Huai'an, Jiangsu, P.R. China
| | - Fei Xia
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, P.R. China
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28
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Toson B, Simon C, Moreno I. The Endometrial Microbiome and Its Impact on Human Conception. Int J Mol Sci 2022; 23:ijms23010485. [PMID: 35008911 PMCID: PMC8745284 DOI: 10.3390/ijms23010485] [Citation(s) in RCA: 41] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/20/2021] [Accepted: 12/24/2021] [Indexed: 12/18/2022] Open
Abstract
Changes in the female genital tract microbiome are consistently correlated to gynecological and obstetrical pathologies, and tract dysbiosis can impact reproductive outcomes during fertility treatment. Nonetheless, a consensus regarding the physiological microbiome core inside the uterine cavity has not been reached due to a myriad of study limitations, such as sample size and experimental design variations, and the influence of endometrial bacterial communities on human reproduction remains debated. Understanding the healthy endometrial microbiota and how changes in its composition affect fertility would potentially allow personalized treatment through microbiome management during assisted reproductive therapies, ultimately leading to improvement of clinical outcomes. Here, we review current knowledge regarding the uterine microbiota and how it relates to human conception.
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Affiliation(s)
- Bruno Toson
- INCLIVA Biomedical Research Institute, Av. Menendez y Pelayo 4, 46010 Valencia, Spain;
| | - Carlos Simon
- Igenomix Foundation/INCLIVA Biomedical Research Institute, Narcis Monturiol Estarriol 11B, 46980 Paterna, Spain
- Department of Obstetrics and Gynecology, University of Valencia, Av. Blásco Ibáñez 15, 46010 Valencia, Spain
- Beth Israel Deaconess Medical Center, Harvard University, 330 Brookline Ave, Boston, MA 02215, USA
- Department of Obstetrics and Gynecology, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX 77030, USA
- Correspondence: (C.S.); (I.M.)
| | - Inmaculada Moreno
- Igenomix Foundation/INCLIVA Biomedical Research Institute, Narcis Monturiol Estarriol 11B, 46980 Paterna, Spain
- Correspondence: (C.S.); (I.M.)
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29
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Sehring J, Jeelani R. Human implantation: The complex interplay between endometrial receptivity, inflammation, and the microbiome. Placenta 2021; 117:179-186. [PMID: 34929458 DOI: 10.1016/j.placenta.2021.12.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 11/01/2021] [Accepted: 12/13/2021] [Indexed: 12/12/2022]
Abstract
Human embryo implantation is an intricate spatiotemporal process that involves the intimate association between the embryo and the endometrium of the mother. During implantation, the endometrium undergoes a dynamic cascade of gene activation and repression, largely driven by autocrine, paracrine, and endocrine action. Steroid hormones, such as estrogen and progesterone, act on a variety of targets including cellular adhesion molecules (CAMs), cytokines, and growth factors to facilitate the implantation process. Given the synchrony required to achieve implantation, it is unsurprising that embryo implantation represents a substantial problem for infertility patients. This is due to a complex interplay taking place at the level of the endometrium. This review discusses the intricacies of embryo implantation including the window of implantation, the cyclical phases of the endometrium, the implantation process itself, and features of endometrial receptivity. Additionally, we will discuss new research regarding inflammatory reproductive biology, epigenetics and microRNA, and the role of the vaginal and endometrial microbiome in implantation. A better understanding of embryo implantation and the interactions occurring at the level of the blastocyst and the endometrium will improve patient care for infertile patients who experience this frustrating challenge.
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Affiliation(s)
- Jacqueline Sehring
- Vios Fertility Institute, 1455 N Milwaukee Ave, Chicago, IL, 60622, United States.
| | - Roohi Jeelani
- Vios Fertility Institute, 1455 N Milwaukee Ave, Chicago, IL, 60622, United States
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30
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Salliss ME, Farland LV, Mahnert ND, Herbst-Kralovetz MM. The role of gut and genital microbiota and the estrobolome in endometriosis, infertility and chronic pelvic pain. Hum Reprod Update 2021; 28:92-131. [PMID: 34718567 DOI: 10.1093/humupd/dmab035] [Citation(s) in RCA: 75] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 08/25/2021] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Endometriosis is a chronic, burdensome condition that is historically understudied. Consequently, there is a lack of understanding of the etiology of the disease and its associated symptoms, including infertility and chronic pelvic pain (CPP). Endometriosis development is influenced by estrogen metabolism and inflammation, which are modulated by several factors including the microbiome and the estrobolome (the collection of genes encoding estrogen-metabolizing enzymes in the gut microbiome). Therefore, there is increasing interest in understanding the role of microbiota in endometriosis etiology. OBJECTIVE AND RATIONALE To date, there is no cure for endometriosis and treatment options often are ineffective. This manuscript will review the potential relationship between the microbiome and endometriosis, infertility and CPP and highlight the available data on the microbiome in relation to endometriosis and its related symptoms. The overarching goal of this manuscript is to inform future microbiome research that will lead to a deeper understanding of the etiology of the disease and possible diagnostic modalities and treatments. The potential impact of the microbiome on estrogen regulation modulated by the estrobolome, as well as inflammation and other endometriosis-promoting mechanisms within the genital tract, will be reviewed. The methodological limitations of microbiome-related studies will be critically assessed to provide improved guidelines for future microbiome and clinical studies. SEARCH METHODS PubMed databases were searched using the following keywords: endometriosis AND microbiome, infertility AND microbiome, pelvic pain AND microbiome, IVF (in-vitro fertilization) AND microbiome, endometriosis AND infertility. Clinical and preclinical animal trials that were eligible for review, and related to microbiome and endometriosis, infertility or CPP were included. All available manuscripts were published in 2002-2021. OUTCOMES In total, 28 clinical and 6 animal studies were included in the review. In both human and animal studies, bacteria were enriched in endometriosis groups, although there was no clear consensus on specific microbiota compositions that were associated with endometriosis, and no studies included infertility or CPP with endometriosis. However, bacterial vaginosis-associated bacteria and Lactobacillus depletion in the cervicovaginal microbiome were associated with endometriosis and infertility in the majority (23/28) of studies. Interpretation of endometrial studies is limited owing to a variety of methodological factors, discussed in this review. In addition, metadata outlining antibiotic usage, age, race/ethnicity, menopausal status and timing of sample collection in relation to diagnosis of endometriosis was not consistently reported. Animal studies (6/6) support a bidirectional relationship between the gut microbiota and endometriosis onset and progression. WIDER IMPLICATIONS There is evidence that a dysbiotic gut or genital microbiota is associated with multiple gynecologic conditions, with mounting data supporting an association between the microbiome and endometriosis and infertility. These microbiomes likely play a role in the gut-brain axis, which further supports a putative association with the spectrum of symptoms associated with endometriosis, including infertility and CPP. Collectively, this review highlights the demand for more rigorous and transparent methodology and controls, consistency across the field, and inclusion of key demographic and clinical characteristics of disease and comparison participants. Rigorous study designs will allow for a better understanding of the potential role of the microbiome in endometriosis etiology and the relationship to other disorders of the female reproductive tract.
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Affiliation(s)
- Mary E Salliss
- Department of Obstetrics and Gynecology, University of Arizona-College of Medicine, Phoenix, AZ, USA.,Department of Biology and Biochemistry, Bath University, Bath, UK
| | - Leslie V Farland
- Department of Epidemiology and Biostatistics, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, AZ, USA.,Department of Obstetrics and Gynecology, University of Arizona-College of Medicine Tucson, Tucson, AZ, USA
| | - Nichole D Mahnert
- Department of Obstetrics and Gynecology, University of Arizona-College of Medicine, Phoenix, AZ, USA.,Department of Obstetrics and Gynecology, Banner-University Medical Center Phoenix, Phoenix, AZ, USA
| | - Melissa M Herbst-Kralovetz
- Department of Obstetrics and Gynecology, University of Arizona-College of Medicine, Phoenix, AZ, USA.,Department of Basic Medical Sciences, University of Arizona-College of Medicine, Phoenix, AZ, USA
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Punzón-Jiménez P, Labarta E. The impact of the female genital tract microbiome in women health and reproduction: a review. J Assist Reprod Genet 2021; 38:2519-2541. [PMID: 34110573 PMCID: PMC8581090 DOI: 10.1007/s10815-021-02247-5] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Accepted: 05/25/2021] [Indexed: 12/17/2022] Open
Abstract
PURPOSE The aim of this review is to gather the available research focusing on female genital tract (FGT) microbiome. Research question focuses in decipher which is the role of FGT microbiota in eubiosis, assisted reproduction techniques (ARTs), and gynaecological disorders, and how microbiome could be utilised to improve reproduction outcomes and to treat fertility issues. METHODS PubMed was searched for articles in English from January 2004 to April 2021 for "genital tract microbiota and reproduction", "endometrial microbiome", "microbiome and reproduction" and "microbiota and infertility". Manual search of the references within the resulting articles was performed. RESULTS Current knowledge confirms predominance of Lactobacillus species, both in vagina and endometrium, whereas higher variability of species is both found in fallopian tubes and ovaries. Microbial signature linked to different disorders such endometriosis, bacterial vaginosis, and gynaecological cancers are described. Broadly, low variability of species and Lactobacillus abundance within the FGT is associated with better reproductive and ART outcomes. CONCLUSION Further research regarding FGT microbiome configuration needs to be done in order to establish a more precise link between microbiota and eubiosis or dysbiosis. Detection of bacterial species related with poor reproductive outcomes, infertility or gynaecological diseases could shape new tools for their diagnosis and treatment, as well as resources to assess the pregnancy prognosis based on endometrial microbiota. Data available suggest future research protocols should be standardised, and it needs to include the interplay among microbiome, virome and mycobiome, and the effect of antibiotics or probiotics on the microbiome shifts.
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Affiliation(s)
- Paula Punzón-Jiménez
- IVI Global Education, Edificio Bipolo, Hospital Universitario La Fe, Fernando Abril Martorell 106, Torre A, Planta 1ª, 46026, Valencia, Spain.
- Department of Pediatrics, Obstetrics and Gynaecology, Universitat de València, Av. Blasco Ibáñez, 15, 46010, Valencia, Spain.
| | - Elena Labarta
- IVIRMA Valencia, Plaza de la Policía Local, 3, 46015, Valencia, Spain
- IVI Foundation - IIS La Fe, Fernando Abril Martorell 106, Torre A, Planta 1ª, 46026, Valencia, Spain
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Chen W, Wei K, He X, Wei J, Yang L, Li L, Chen T, Tan B. Identification of Uterine Microbiota in Infertile Women Receiving in vitro Fertilization With and Without Chronic Endometritis. Front Cell Dev Biol 2021; 9:693267. [PMID: 34485281 PMCID: PMC8409574 DOI: 10.3389/fcell.2021.693267] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Accepted: 07/21/2021] [Indexed: 01/13/2023] Open
Abstract
In vitro fertilization (IVF) is an important assisted reproductive technology in treating infertility, whose failure rate is still high. Studies suggested that uterine microbiota are related to women’s reproductive diseases and persisting intrauterine bacterial infectious conditions, such as chronic endometritis (CE), impairing the pregnant processes. However, the relationship between uterine microbiota and IVF outcomes is still an open question. In the present study, 94 patients diagnosed with infertility were enrolled and were divided into CE (E group, n = 25) and non-CE (NE group, n = 69) groups depending on the hysteroscopy and immunohistochemistry. Subsequently, E (Ep, n = 8 and Enp, n = 17) and NE (NEp, n = 41 and NEnp, n = 28) groups were divided into pregnancy and non-pregnancy groups depending on the IVF outcomes, respectively. The uterine fluids were collected and microbial profiles were examined through the V4 region of 16S rRNA gene high-throughput sequencing. The results demonstrated that patients with CE had significantly lower clinical pregnancy rate compared with the non-CE patients (32 vs. 58.42%, p = 0.0014). The relative abundances of Proteobacteria and Acidobacteria were higher in the non-CE group, whereas high abundances of Actinobacteria and Fusobacteria were observed in the CE group at the phylum level. At the genus level, high relative abundances of Gardnerella were observed in the CE group and non-pregnancy groups, which significantly referred to the negative IVF outcome. In conclusion, CE may be a key factor for the negative outcome after IVF, of which the uterine microbiota plays a pivotal role, and the microbial diversity in uterine may serve as a biomarker to forecast the success of IVF outcome.
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Affiliation(s)
- Weijun Chen
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,The Reproductive Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Kehong Wei
- Institute of Translational Medicine, Nanchang University, Nanchang, China
| | - Xia He
- Institute of Translational Medicine, Nanchang University, Nanchang, China
| | - Jing Wei
- School of Life Sciences, Nanchang University, Nanchang, China
| | - Lijuan Yang
- The Reproductive Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Lin Li
- The Reproductive Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Tingtao Chen
- Institute of Translational Medicine, Nanchang University, Nanchang, China
| | - Buzhen Tan
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
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The reproductive tract microbiota in pregnancy. Biosci Rep 2021; 41:229559. [PMID: 34397086 PMCID: PMC8421591 DOI: 10.1042/bsr20203908] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/12/2021] [Accepted: 08/16/2021] [Indexed: 12/18/2022] Open
Abstract
The reproductive tract microbiota plays a crucial role in maintenance of normal pregnancy and influences reproductive outcomes. Microbe–host interactions in pregnancy remain poorly understood and their role in shaping immune modulation is still being uncovered. In this review, we describe the composition of vaginal microbial communities in the reproductive tract and their association with reproductive outcomes. We also consider strategies for manipulating microbiota composition by using live biotherapeutics, selective eradication of pathogenic bacteria with antibiotics and vaginal microbiota transplantation. Finally, future developments in this field and the need for mechanistic studies to explore the functional significance of reproductive tract microbial communities are highlighted.
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Ichiyama T, Kuroda K, Nagai Y, Urushiyama D, Ohno M, Yamaguchi T, Nagayoshi M, Sakuraba Y, Yamasaki F, Hata K, Miyamoto S, Itakura A, Takeda S, Tanaka A. Analysis of vaginal and endometrial microbiota communities in infertile women with a history of repeated implantation failure. Reprod Med Biol 2021; 20:334-344. [PMID: 34262402 PMCID: PMC8254176 DOI: 10.1002/rmb2.12389] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 03/25/2021] [Accepted: 04/20/2021] [Indexed: 01/12/2023] Open
Abstract
PURPOSE To identify specific bacterial communities in vaginal and endometrial microbiotas as biomarkers of implantation failure by comprehensively analyzing their microbiotas using next-generation sequencing. METHODS We investigated α- and β-diversities of vaginal and endometrial microbiotas using 16S rRNA gene sequencing and compared their profiles between 145 women with repeated implantation failure (RIF) and 21 controls who lacked the factors responsible for implantation failure with a high probability of being healthy and fertile to identify specific bacteria that induce implantation failure. RESULTS The endometrial microbiotas had higher α-diversities than did the vaginal microbiotas (P < .001). The microbiota profiles showed that vaginal and endometrial samples in RIF patients had significantly higher levels of 5 and 14 bacterial genera, respectively, than those in controls. Vaginal Lactobacillus rates in RIF patients were significantly lower at 76.4 ± 38.9% compared with those of the controls at 91.8 ± 22.7% (P = .018), but endometrial Lactobacillus rates did not significantly differ between the RIF patients and controls (56.2 ± 36.4% and 58.8 ± 37.0%, respectively, P = .79). CONCLUSIONS Impaired microbiota communities containing specific bacteria in both the endometrium and vagina were associated with implantation failure. The vaginal Lactobacillus rates, but not the endometrial, may be a biomarker for RIF.
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Affiliation(s)
- Takuhiko Ichiyama
- Saint Mother Obstetrics and Gynecology Clinic and Institute for Assisted Reproductive TechnologiesFukuokaJapan
- Department of Obstetrics and GynecologyJuntendo University School of MedicineTokyoJapan
| | - Keiji Kuroda
- Department of Obstetrics and GynecologyJuntendo University School of MedicineTokyoJapan
- Center for Reproductive Medicine and Implantation ResearchSugiyama Clinic ShinjukuTokyoJapan
| | - Yoko Nagai
- Varinos Inc.TokyoJapan
- Department of Maternal‐Fetal BiologyNational Research Institute for Child Health and DevelopmentTokyoJapan
| | - Daichi Urushiyama
- Department of Obstetrics and GynecologyFaculty of MedicineFukuoka UniversityFukuokaJapan
| | - Motoharu Ohno
- Saint Mother Obstetrics and Gynecology Clinic and Institute for Assisted Reproductive TechnologiesFukuokaJapan
- Department of Obstetrics and GynecologyJuntendo University School of MedicineTokyoJapan
| | - Takashi Yamaguchi
- Saint Mother Obstetrics and Gynecology Clinic and Institute for Assisted Reproductive TechnologiesFukuokaJapan
| | - Motoi Nagayoshi
- Saint Mother Obstetrics and Gynecology Clinic and Institute for Assisted Reproductive TechnologiesFukuokaJapan
| | | | - Fumio Yamasaki
- Division of PathologyJapan Community Health Care OrganizationSaga Central HospitalSagaJapan
| | - Kenichiro Hata
- Department of Maternal‐Fetal BiologyNational Research Institute for Child Health and DevelopmentTokyoJapan
| | - Shingo Miyamoto
- Department of Obstetrics and GynecologyFaculty of MedicineFukuoka UniversityFukuokaJapan
| | - Atsuo Itakura
- Department of Obstetrics and GynecologyJuntendo University School of MedicineTokyoJapan
| | - Satoru Takeda
- Department of Obstetrics and GynecologyJuntendo University School of MedicineTokyoJapan
| | - Atsushi Tanaka
- Saint Mother Obstetrics and Gynecology Clinic and Institute for Assisted Reproductive TechnologiesFukuokaJapan
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Abstract
PURPOSE OF THE REVIEW In recent years there has been significant progress in the study of endometrial microbiota. This line of investigation has not been free of controversy and discussion. It is a key for clinicians involved to remain updated with the most recent findings in microbiome and its clinical implications to be able to offer patients all possible treatments. RECENT FINDINGS The existence of endometrial microbiota now seems undisputed. Current lines of work are centered on dysbiosis and its connection to other pathologies. It is in the field of assisted reproductive technology where this research plays an even more crucial role. In this case, we are focusing our attention toward the study of ectopic pregnancies, searching for similarities in their etiopathogenesis and alterations in the endometrial microbiota. SUMMARY Ectopic pregnancy has great repercussions for patients and for the healthcare system. We must continue researching to offer patients techniques and behaviors that can prevent it. The increase in its incidence makes ectopic pregnancy an entity that we must study.
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Borella F, Carosso AR, Cosma S, Preti M, Collemi G, Cassoni P, Bertero L, Benedetto C. Gut Microbiota and Gynecological Cancers: A Summary of Pathogenetic Mechanisms and Future Directions. ACS Infect Dis 2021; 7:987-1009. [PMID: 33848139 DOI: 10.1021/acsinfecdis.0c00839] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Over the past 20 years, important relationships between the microbiota and human health have emerged. A link between alterations of microbiota composition (dysbiosis) and cancer development has been recently demonstrated. In particular, the composition and the oncogenic role of intestinal bacterial flora has been extensively investigated in preclinical and clinical studies focusing on gastrointestinal tumors. Overall, the development of gastrointestinal tumors is favored by dysbiosis as it leads to depletion of antitumor substances (e.g., short-chain fatty acids) produced by healthy microbiota. Moreover, dysbiosis leads to alterations of the gut barrier, promotes a chronic inflammatory status through activation of toll-like receptors, and causes metabolic and hormonal dysregulations. However, the effects of these imbalances are not limited to the gastrointestinal tract and they can influence gynecological tumor carcinogenesis as well. The purpose of this Review is to provide a synthetic update about the mechanisms of interaction between gut microbiota and the female reproductive tract favoring the development of neoplasms. Furthermore, novel therapeutic approaches based on the modulation of microbiota and their role in gynecological oncology are discussed.
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Affiliation(s)
- Fulvio Borella
- Obstetrics and Gynecology Unit 1, Sant’ Anna Hospital, Department of Surgical Sciences, University of Turin, 10126 Turin, Italy
| | - Andrea Roberto Carosso
- Obstetrics and Gynecology Unit 1, Sant’ Anna Hospital, Department of Surgical Sciences, University of Turin, 10126 Turin, Italy
| | - Stefano Cosma
- Obstetrics and Gynecology Unit 1, Sant’ Anna Hospital, Department of Surgical Sciences, University of Turin, 10126 Turin, Italy
| | - Mario Preti
- Obstetrics and Gynecology Unit 1, Sant’ Anna Hospital, Department of Surgical Sciences, University of Turin, 10126 Turin, Italy
| | - Giammarco Collemi
- Pathology Unit, Department of Medical Sciences, University of Turin, 10126 Turin, Italy
| | | | - Luca Bertero
- Pathology Unit, Department of Medical Sciences, University of Turin, 10126 Turin, Italy
| | - Chiara Benedetto
- Obstetrics and Gynecology Unit 1, Sant’ Anna Hospital, Department of Surgical Sciences, University of Turin, 10126 Turin, Italy
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The Combination of Berberine, Tocotrienols and Coffee Extracts Improves Metabolic Profile and Liver Steatosis by the Modulation of Gut Microbiota and Hepatic miR-122 and miR-34a Expression in Mice. Nutrients 2021; 13:nu13041281. [PMID: 33924725 PMCID: PMC8069822 DOI: 10.3390/nu13041281] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 04/04/2021] [Accepted: 04/12/2021] [Indexed: 12/12/2022] Open
Abstract
Non-alcoholic-fatty liver disease (NAFLD) is spreading worldwide. Specific drugs for NAFLD are not yet available, even if some plant extracts show beneficial properties. We evaluated the effects of a combination, composed by Berberis Aristata, Elaeis Guineensis and Coffea Canephora, on the development of obesity, hepatic steatosis, insulin-resistance and on the modulation of hepatic microRNAs (miRNA) levels and microbiota composition in a mouse model of liver damage. C57BL/6 mice were fed with standard diet (SD, n = 8), high fat diet (HFD, n = 8) or HFD plus plant extracts (HFD+E, n = 8) for 24 weeks. Liver expression of miR-122 and miR-34a was evaluated by quantitativePCR. Microbiome analysis was performed on cecal content by 16S rRNA sequencing. HFD+E-mice showed lower body weight (p < 0.01), amelioration of insulin-sensitivity (p = 0.021), total cholesterol (p = 0.014), low-density-lipoprotein-cholesterol (p < 0.001), alanine-aminotransferase (p = 0.038) and hepatic steatosis compared to HFD-mice. While a decrease of hepatic miR-122 and increase of miR-34a were observed in HFD-mice compared to SD-mice, both these miRNAs had similar levels to SD-mice in HFD+E-mice. Moreover, a different microbial composition was found between SD- and HFD-mice, with a partial rescue of dysbiosis in HFD+E-mice. This combination of plant extracts had a beneficial effect on HFD-induced NAFLD by the modulation of miR-122, miR-34a and gut microbiome.
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Luteal Support with very Low Daily Dose of Human Chorionic Gonadotropin after Fresh Embryo Transfer as an Alternative to Cycle Segmentation for High Responders Patients Undergoing Gonadotropin-Releasing Hormone Agonist-Triggered IVF. Pharmaceuticals (Basel) 2021; 14:ph14030228. [PMID: 33800021 PMCID: PMC7998839 DOI: 10.3390/ph14030228] [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: 02/10/2021] [Revised: 03/02/2021] [Accepted: 03/03/2021] [Indexed: 11/16/2022] Open
Abstract
The segmentation of the in vitro fertilization (IVF) cycle, consisting of the freezing of all embryos and the postponement of embryo transfer (ET), has become popular in recent years, with the main purpose of preventing ovarian hyperstimulation syndrome (OHSS) in patients with high response to controlled ovarian stimulation (COS). Indeed cycle segmentation (CS), especially when coupled to a GnRH-agonist trigger, was shown to reduce the incidence of OHSS in high-risk patients. However, CS increases the economic costs and the work amount for IVF laboratories. An alternative strategy is to perform a fresh ET in association with intensive luteal phase pharmacological support, able to overcome the negative effects of the GnRH-agonist trigger on the luteal phase and on endometrial receptivity. In order to compare these two strategies, we performed a retrospective, real-life cohort study including 240 non-polycystic ovarian syndrome (PCO) women with expected high responsiveness to COS (AMH >2.5 ng/mL), who received either fresh ET plus 100 IU daily human chorionic gonadotropin (hCG) as luteal support (FRESH group, n = 133), or cycle segmentation with freezing of all embryos and postponed ET (CS group, n = 107). The primary outcomes were: implantation rate (IR), live birth rate (LBR) after the first ET, and incidence of OHSS. Overall, significantly higher IR and LBR were observed in the CS group than in the FRESH group (42.9% vs. 27.8%, p < 0.05 and 32.7% vs. 19.5%, p < 0.05, respectively); the superiority of CS strategy was particularly evident when 16-19 oocytes were retrieved (LBR 42.2% vs. 9.5%, p = 0.01). Mild OHSS appeared with the same incidence in the two groups, whereas moderate and severe OHSS forms were observed only in the FRESH group (1.5% and 0.8%, respectively). In conclusion, in non-PCO women, high responders submitted to COS with the GnRH-antagonist protocol and GnRH-agonist trigger, CS strategy was associated with higher IR and LBR than the strategy including fresh ET followed by luteal phase support with a low daily hCG dose. CS appears to be advisable, especially when >15 oocytes are retrieved.
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Molina NM, Sola-Leyva A, Haahr T, Aghajanova L, Laudanski P, Castilla JA, Altmäe S. Analysing endometrial microbiome: methodological considerations and recommendations for good practice. Hum Reprod 2021; 36:859-879. [DOI: 10.1093/humrep/deab009] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 12/02/2020] [Indexed: 12/12/2022] Open
Abstract
ABSTRACT
There is growing evidence that the upper female genital tract is not sterile, harbouring its own microbial communities. However, the significance and the potential effect of endometrial microorganisms on reproductive functions remain to be fully elucidated. Analysing the endometrial microbiome, the microbes and their genetic material present in the endometrium, is an emerging area of study. The initial studies suggest it is associated with poor reproductive outcomes and with different gynaecological pathologies. Nevertheless, studying a low-biomass microbial niche as is endometrium, the challenge is to conduct well-designed and well-controlled experiments in order to avoid and adjust for the risk of contamination, especially from the lower genital tract. Herein, we aim to highlight methodological considerations and propose good practice recommendations for future endometrial microbiome studies.
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Affiliation(s)
- Nerea M Molina
- Department of Biochemistry and Molecular Biology, Faculty of Sciences, University of Granada, Granada 18071, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada 18014, Spain
| | - Alberto Sola-Leyva
- Department of Biochemistry and Molecular Biology, Faculty of Sciences, University of Granada, Granada 18071, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada 18014, Spain
| | - Thor Haahr
- The Fertility Clinic, Skive Regional Hospital, Skive 7800, Denmark
| | - Lusine Aghajanova
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Stanford School of Medicine, Sunnyvale, CA 94087, USA
| | - Piotr Laudanski
- Department of Obstetrics and Gynecology, Medical University of Warsaw, Warsaw 02-015, Poland
| | - Jose Antonio Castilla
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada 18014, Spain
- Unidad de Reproducción, UGC de Obstetricia y Ginecología, Hospital Universitario Virgen de las Nieves, Granada 18012, Spain
- CEIFER Biobanco—NextClinics, Granada 18004, Spain
| | - Signe Altmäe
- Department of Biochemistry and Molecular Biology, Faculty of Sciences, University of Granada, Granada 18071, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada 18014, Spain
- Competence Centre on Health Technologies, Tartu 50410, Estonia
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Griesinger G, Blockeel C, Kahler E, Pexman-Fieth C, Olofsson JI, Driessen S, Tournaye H. Dydrogesterone as an oral alternative to vaginal progesterone for IVF luteal phase support: A systematic review and individual participant data meta-analysis. PLoS One 2020; 15:e0241044. [PMID: 33147288 PMCID: PMC7641447 DOI: 10.1371/journal.pone.0241044] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 10/07/2020] [Indexed: 12/13/2022] Open
Abstract
The aim of this systematic review and meta-analysis was to conduct a comprehensive assessment of the evidence on the efficacy and safety of oral dydrogesterone versus micronized vaginal progesterone (MVP) for luteal phase support. Embase and MEDLINE were searched for studies that evaluated the effect of luteal phase support with daily administration of oral dydrogesterone (20 to 40 mg) versus MVP capsules (600 to 800 mg) or gel (90 mg) on pregnancy or live birth rates in women undergoing fresh-cycle IVF (protocol registered at PROSPERO [CRD42018105949]). Individual participant data (IPD) were extracted for the primary analysis where available and aggregate data were extracted for the secondary analysis. Nine studies were eligible for inclusion; two studies had suitable IPD (full analysis sample: n = 1957). In the meta-analysis of IPD, oral dydrogesterone was associated with a significantly higher chance of ongoing pregnancy at 12 weeks of gestation (odds ratio [OR], 1.32; 95% confidence interval [CI], 1.08 to 1.61; P = 0.0075) and live birth (OR, 1.28; 95% CI, 1.04 to 1.57; P = 0.0214) compared to MVP. A meta-analysis combining IPD and aggregate data for all nine studies also demonstrated a statistically significant difference between oral dydrogesterone and MVP (pregnancy: OR, 1.16; 95% CI, 1.01 to 1.34; P = 0.04; live birth: OR, 1.19; 95% CI, 1.03 to 1.38; P = 0.02). Safety parameters were similar between the two groups. Collectively, this study indicates that a higher pregnancy rate and live birth rate may be obtained in women receiving oral dydrogesterone versus MVP for luteal phase support.
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Affiliation(s)
- Georg Griesinger
- Department of Gynecological Endocrinology and Reproductive Medicine, University Hospital of Schleswig-Holstein, Lübeck, Germany
- * E-mail:
| | - Christophe Blockeel
- Center for Reproductive Medicine, Universitair Ziekenhuis Brussel, Brussels, Belgium
| | - Elke Kahler
- Established Pharmaceuticals Division, Global Biometrics, Abbott Laboratories GmbH, Hannover, Germany
| | - Claire Pexman-Fieth
- Established Pharmaceuticals Division, Global Clinical Development, Abbott GmbH, Wiesbaden, Germany
| | - Jan I. Olofsson
- Established Pharmaceuticals Division, Global Medical Affairs, Abbott Products Operations AG, Allschwil, Switzerland
- Division of Obstetrics and Gynecology, Department of Women’s and Children’s Health, Karolinska Institutet, Stockholm, Sweden
| | - Stefan Driessen
- Global Biometrics, Established Pharmaceuticals Division, Abbott Healthcare Products BV, Weesp, The Netherlands
| | - Herman Tournaye
- Center for Reproductive Medicine, Universitair Ziekenhuis Brussel, Brussels, Belgium
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