1
|
Morales-Sánchez E, Campuzano-Caballero JC, Cervantes A, Martínez-Ibarra A, Cerbón M, Vital-Reyes VS. Which side of the coin are you on regarding possible postnatal oogenesis? Arch Med Res 2024; 55:103071. [PMID: 39236439 DOI: 10.1016/j.arcmed.2024.103071] [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: 06/30/2024] [Accepted: 08/14/2024] [Indexed: 09/07/2024]
Abstract
It is well known that oocytes are produced during fetal development and that the total number of primary follicles is determined at birth. In humans, there is a constant loss of follicles after birth until about two years of age. The number of follicles is preserved until the resumption of meiosis at puberty and there is no renewal of the oocytes; this dogma was maintained in the last century because there were no suitable techniques to detect and obtain stem cells. However, following stem cell markers, several scientists have detected them in developing and adult human ovarian tissues, especially in the ovarian surface epithelial cells. Furthermore, many authors using different methodological strategies have indicated this possibility. This evidence has led many scientists to explore this hypothesis; there is no definitive consensus to accept this idea. Interestingly, oocyte retrieval from mature ovaries and other tissue sources of stem cells has contributed to the development of strategies for the retrieval of mature oocytes, useful for assisted reproductive technology. Here, we review the evidence and controversies on oocyte neooogenesis in adult women; in addition, we agree with the idea that this process may occur in adulthood and that its alteration may be related to various pathologies in women, such as polycystic ovary syndrome, premature ovarian insufficiency, diminished ovarian reserve and several infertility and genetic disorders.
Collapse
Affiliation(s)
- Elizabeth Morales-Sánchez
- Unidad de Histología, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Juan Carlos Campuzano-Caballero
- Departamento de Biología Comparada, Facultad de Ciencias, Laboratorio de Biología de la Reproducción Animal, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Alicia Cervantes
- Servicio de Genética, Hospital General de México, Eduardo Liceaga, Mexico City, Mexico; Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Alejandra Martínez-Ibarra
- Departmento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Av. Universidad 3000, Circuito Escolar, Mexico City, Coyoacán 04510, Mexico
| | - Marco Cerbón
- Departmento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Av. Universidad 3000, Circuito Escolar, Mexico City, Coyoacán 04510, Mexico.
| | | |
Collapse
|
2
|
Hou L, Hong H, Cao W, Wei L, Weng L, Yuan S, Xiao C, Zhang Q, Wang Q, Lai D. Identification and characterization of multipotential stem cells in immortalized normal ovarian surface epithelial cells. Acta Biochim Biophys Sin (Shanghai) 2024; 56:239-254. [PMID: 38243680 PMCID: PMC10984850 DOI: 10.3724/abbs.2023253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Accepted: 09/21/2023] [Indexed: 01/21/2024] Open
Abstract
The ovarian surface epithelium (OSE) is a single layer of squamous-to-cuboidal epithelial cells that experience repetitive ovulatory rupture and subsequent repair. However, the characteristics of human immortalized ovarian surface epithelial cells (IOSE80) remain elusive. This study aims to determine whether IOSE80 cells have the characteristics of stem cell proliferation and multilineage differentiation and their application in regenerative medicine. IOSE80 cells are sequenced by high-throughput transcriptome analysis, and 5 sets of public data are used to compare the differences between IOSE80 cells and bone marrow mesenchymal stem cells, pluripotent stem cells, and oocytes in transcriptome profiling. The IOSE80 cells present a cobblestone-like monolayer and express the epithelial cell marker KRT18; the stem cell markers IFITM3, ALDH1A1, and VIM; lowly express stem cell marker LGR5 and germ cell markers DDX4 and DAZL. In addition, the GO terms "regulation of stem cell proliferation", "epithelial cell proliferation", etc., are significantly enriched ( P<0.05). IOSE80 cells have the potential to act as mesenchymal stem cells to differentiate into adipocytes with lipid droplets, osteoblasts, and chondroblasts in vitro. IOSE80 cells express pluripotent stem cell markers, including OCT4, SSEA4, TRA-1-60, and TRA-1-81, and they can be induced into three germ layers in vitro. IOSE80 cells also form oocyte-like cells in vitro and in vivo. In addition, IOSE80 cells exhibit robust proliferation, migration, and ovarian repair functions after in vivo transplantation. This study demonstrates that IOSE80 cells have the characteristics of pluripotent/multipotent stem cells, indicating their important role in tissue engineering and regenerative medicine.
Collapse
Affiliation(s)
- Lin Hou
- The International Peace Maternity and Child Health HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai200030China
- Shanghai Key Laboratory of Embryo Original DiseasesShanghai200030China
| | - Hanqing Hong
- The International Peace Maternity and Child Health HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai200030China
- Shanghai Key Laboratory of Embryo Original DiseasesShanghai200030China
| | - Wenjiao Cao
- The International Peace Maternity and Child Health HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai200030China
- Shanghai Key Laboratory of Embryo Original DiseasesShanghai200030China
| | - Liutong Wei
- The International Peace Maternity and Child Health HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai200030China
- Shanghai Key Laboratory of Embryo Original DiseasesShanghai200030China
| | - Lichun Weng
- The International Peace Maternity and Child Health HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai200030China
- Shanghai Key Laboratory of Embryo Original DiseasesShanghai200030China
| | - Shuang Yuan
- The International Peace Maternity and Child Health HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai200030China
- Shanghai Key Laboratory of Embryo Original DiseasesShanghai200030China
| | - Chengqi Xiao
- The International Peace Maternity and Child Health HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai200030China
- Shanghai Key Laboratory of Embryo Original DiseasesShanghai200030China
| | - Qiuwan Zhang
- The International Peace Maternity and Child Health HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai200030China
- Shanghai Key Laboratory of Embryo Original DiseasesShanghai200030China
| | - Qian Wang
- The International Peace Maternity and Child Health HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai200030China
- Shanghai Key Laboratory of Embryo Original DiseasesShanghai200030China
| | - Dongmei Lai
- The International Peace Maternity and Child Health HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai200030China
- Shanghai Key Laboratory of Embryo Original DiseasesShanghai200030China
| |
Collapse
|
3
|
Taheri Moghadam M, Nazayer H, Azandeh S, Eftekhari Moghadam AR, Nikbakht R. The Effect of Normal Follicular Fluid on the Differentiation of PCOS Ovarian Stem Cells into Oocyte-Like Cells. Adv Biomed Res 2023; 12:259. [PMID: 38192893 PMCID: PMC10772787 DOI: 10.4103/abr.abr_151_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 06/11/2023] [Accepted: 07/03/2023] [Indexed: 01/10/2024] Open
Abstract
Background Polycystic ovarian syndrome (PCOS) is one of the causes of infertility for which treatment methods do not have a high rate of pregnancy. In this study, the stem cells in the follicular fluid (FF) of patients were grown in the normal FF, and their differentiation into oocytes was evaluated. Materials and Methods The FF of PCOS patients was centrifuged, and their cells were cultured with and without 20% normal FF for 2 weeks. The cells were evaluated for their morphology by inverted microscope and for markers of stem cells (NANOG and OCT4) and oocytes (zona pellucida (ZP) 2 and ZP3) by RT-PCR and immunocytochemistry. The amount of steroids was measured by enzyme-linked immunosorbent assay (ELISA). Results The cells were all round on day 0. After that, they had a heterogeneous morphology (fibroblast-like cells, epithelial-like cells, and round oocyte-like cells). In the first week, NANOG and OCT4 genes in the study group were less expressed than those in the control group (P < 0.0001) (~0.5-fold), while ZP2 and Z3 genes were more expressed (P < 0.0001) (~2-fold). In the second week, stem cell genes were more expressed in the control group (~2 fold), and oocyte genes were more expressed in the study group (P < 0.0001) (~2.5-3.11 fold). These results were also confirmed by immunocytochemistry. The amount of steroids was much higher in the study group (three times and five times in two weeks) (P < 0.0001). Conclusions Stem cells can be obtained from the FF of PCOS, and normal FF has a positive effect on the growth and maturation of oocyte-like cells in vitro.
Collapse
Affiliation(s)
- Mahin Taheri Moghadam
- Cellular and Molecular Research Center, Medical Basic Sciences Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
- Department of Anatomical Science, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Hanan Nazayer
- Department of Anatomical Science, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Saeed Azandeh
- Cellular and Molecular Research Center, Medical Basic Sciences Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
- Department of Anatomical Science, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Ali R. Eftekhari Moghadam
- Department of Anatomical Science, Faculty of Medicine, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Roshan Nikbakht
- Fertility, Infertility and Perinatology Center, Imam Khomeini Hospital, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| |
Collapse
|
4
|
Bhartiya D, Sharma D. VSELs and OSCs together sustain oogenesis in adult ovaries and their dysfunction results in age-related senescence, PCOS, POI and cancer. J Ovarian Res 2023; 16:29. [PMID: 36726163 PMCID: PMC9890840 DOI: 10.1186/s13048-022-01093-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 12/27/2022] [Indexed: 02/03/2023] Open
Abstract
Multiple studies using single-cell RNA sequencing (scRNAseq) have failed to detect stem cells in adult ovaries. We have maintained that two populations of ovarian stem cells including pluripotent, very small embryonic-like stem cells (VSELs) and tissue-committed 'progenitors' termed ovarian stem cells (OSCs) can easily be detected in Hematoxylin and Eosin-stained ovary surface epithelial (OSE) cells smears prepared from both mice and human ovaries. Most likely the stem cells never get subjected to scRNAseq since they pellet down only by centrifuging cells suspension at 1000 g while cells for scRNAseq were invariably prepared by centrifuging at 200-400 g. A recent article provided further explanation for the failure of scRNAseq to detect ovarian stem cells. Extensive reanalysis of data (generated by scRNAseq) using an advanced software successfully detected OSCs and meiotic markers supporting neo-oogenesis in adult human ovaries. But this article remained critical on the biological relevance of VSELs and their relationship with OSCs. By carefully studying the OSE cells smears (which hold VSELs, OSCs and germ cell nests GCNs), prepared by partial trypsin digestion of intact mice ovaries during different stages of estrus cycle, we have successfully delineated novel functions of VSELs/OSCs in vivo under physiological conditions. VSELs undergo asymmetrical divisions to self-renew and give rise to slightly bigger OSCs which in turn undergo symmetrical divisions and clonal expansion to form GCNs, regular neo-oogenesis and follicle assembly. GCNs have been earlier described in fetal ovaries and during OSE cells culture (from adult ovaries) in response to FSH treatment. Dysfunction of VSELs/OSCs (which express ERα, ERβ, FSHR) due to neonatal exposure to endocrine disruption results in ovarian insufficiency and polycystic ovaries. VSELs have also been implicated in ovarian cancer. Age-related ovarian senescence/menopause is also due to dysfunction and blocked differentiation of VSELs/OSCs. These novel findings in vivo along with abundant in vitro and lineage tracing studies data in published literature provides huge scope for further research, offers novel avenues to manage ovarian pathologies and calls for re-writing of textbooks.
Collapse
Affiliation(s)
- Deepa Bhartiya
- Stem Cell Biology Department, ICMR-National Institute for Research in Reproductive & Child Health, Jehangir Merwanji Street, Parel, Mumbai, 400 012, India.
- Present address: Epigeneres Biotech Pvt Ltd, Sun Mill Compound, Senapati Bapat Marg, Lower Parel, Mumbai, 400 013, India.
| | - Diksha Sharma
- Stem Cell Biology Department, ICMR-National Institute for Research in Reproductive & Child Health, Jehangir Merwanji Street, Parel, Mumbai, 400 012, India
| |
Collapse
|
5
|
Bhartiya D, Jha N, Tripathi A, Tripathi A. Very small embryonic-like stem cells have the potential to win the three-front war on tissue damage, cancer, and aging. Front Cell Dev Biol 2023; 10:1061022. [PMID: 36684436 PMCID: PMC9846763 DOI: 10.3389/fcell.2022.1061022] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 11/14/2022] [Indexed: 01/05/2023] Open
Abstract
The concept of dedifferentiation and reprogramming of mature somatic cells holds much promise for the three-front "war" against tissue damage, cancer, and aging. It was hoped that reprogramming human somatic cells into the induced pluripotent state, along with the use of embryonic stem cells, would transform regenerative medicine. However, despite global efforts, clinical applications remain a distant dream, due to associated factors such as genomic instability, tumorigenicity, immunogenicity, and heterogeneity. Meanwhile, the expression of embryonic (pluripotent) markers in multiple cancers has baffled the scientific community, and it has been suggested that somatic cells dedifferentiate and "reprogram" into the pluripotent state in vivo to initiate cancer. It has also been suggested that aging can be reversed by partial reprogramming in vivo. However, better methods are needed; using vectors or Yamanaka factors in vivo, for example, is dangerous, and many potential anti-aging therapies carry the same risks as those using induced pluripotent cells, as described above. The present perspective examines the potential of endogenous, pluripotent very small embryonic-like stem cells (VSELs). These cells are naturally present in multiple tissues; they routinely replace diseased tissue and ensure regeneration to maintain life-long homeostasis, and they have the ability to differentiate into adult counterparts. Recent evidence suggests that cancers initiate due to the selective expansion of epigenetically altered VSELs and their blocked differentiation. Furthermore, VSEL numbers have been directly linked to lifespan in studies of long- and short-lived transgenic mice, and VSEL dysfunction has been found in the ovaries of aged mice. To conclude, a greater interest in VSELs, with their potential to address all three fronts of this war, could be the "light at the end of the tunnel."
Collapse
|
6
|
Eijkenboom L, Saedt E, Zietse C, Braat D, Beerendonk C, Peek R. Strategies to safely use cryopreserved ovarian tissue to restore fertility after cancer: A systematic review. Reprod Biomed Online 2022; 45:763-778. [DOI: 10.1016/j.rbmo.2022.05.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 05/19/2022] [Accepted: 05/23/2022] [Indexed: 10/18/2022]
|
7
|
Eijkenboom L, Palacio-Castañeda V, Groenman F, Braat D, Beerendonk C, Brock R, Verdurmen W, Peek R. Assessing the use of tumor-specific DARPin-toxin fusion proteins for ex vivo purging of cancer metastases from human ovarian cortex before autotransplantation. F&S SCIENCE 2021; 2:330-344. [PMID: 35559858 DOI: 10.1016/j.xfss.2021.09.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 09/16/2021] [Accepted: 09/17/2021] [Indexed: 06/15/2023]
Abstract
OBJECTIVE To assess the use of tumor-specific designed ankyrin repeat proteins (DARPins) fused to a domain of Pseudomonas aeruginosa exotoxin A for purging of cancer metastases from the ovarian cortex. DESIGN Experimental study. SETTING University medical center. PATIENT(S) Human ovarian cortex. INTERVENTION(S) Ovarian cortex harboring artificially induced breast cancer metastases was treated with DARPins targeted to epithelial cell adhesion molecule (EpCAM) and human epidermal growth factor receptor 2 (HER2). MAIN OUTCOME MEASURE(S) The presence of any remaining cancer cells after purging was analyzed by (immuno)histochemistry and reverse transcriptase polymerase chain reaction. Effects on the viability of the ovarian cortex were determined by (immuno)histology, a follicular viability assay, and an assay to determine the in vitro growth capacity of small follicles. RESULT(S) After purging with EpCAM-targeted DARPin, all EpCAM-positive breast cancer cells were eradicated from the ovarian cortex. Although treatment had no effect on the morphology or viability of small follicles, a sharp decrease in oocyte viability during in vitro growth was observed, presumably due to low-level expression of EpCAM on oocytes. The HER2-targeted DARPins had no detrimental effects on the morphology, viability, or in vitro growth of small follicles. HER2-positive breast cancer foci were fully eliminated from the ovarian cortex, and the reverse transcriptase polymerase chain reaction showed a decrease to basal levels of HER2 mRNA after purging. CONCLUSION(S) Purging cancer metastases from ovarian cortex without impairing ovarian tissue integrity is possible by targeting tumor cell surface proteins with exotoxin A-fused DARPins. By adapting the target specificity of the cytotoxic DARPin fusions, it should be possible to eradicate metastases from all types of malignancies.
Collapse
Affiliation(s)
- Lotte Eijkenboom
- Department of Obstetrics and Gynaecology, Radboud University Medical Center, Nijmegen, Netherlands.
| | - Valentina Palacio-Castañeda
- Department of Biochemistry, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - Freek Groenman
- Department of Obstetrics and Gynecology, Amsterdam University Medical Center, Location Vrije Universiteit, Amsterdam, Netherlands
| | - Didi Braat
- Department of Obstetrics and Gynaecology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Catharina Beerendonk
- Department of Obstetrics and Gynaecology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Roland Brock
- Department of Biochemistry, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands; Department of Medical Biochemistry, College of Medicine and Medical Sciences, Arabian Gulf University, Kingdom of Bahrain
| | - Wouter Verdurmen
- Department of Biochemistry, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - Ronald Peek
- Department of Obstetrics and Gynaecology, Radboud University Medical Center, Nijmegen, Netherlands
| |
Collapse
|
8
|
Peek R, Eijkenboom LL, Braat DDM, Beerendonk CCM. Complete Purging of Ewing Sarcoma Metastases from Human Ovarian Cortex Tissue Fragments by Inhibiting the mTORC1 Signaling Pathway. J Clin Med 2021; 10:jcm10194362. [PMID: 34640378 PMCID: PMC8509560 DOI: 10.3390/jcm10194362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 09/20/2021] [Accepted: 09/23/2021] [Indexed: 11/24/2022] Open
Abstract
Restoration of fertility by autologous transplantation of ovarian cortex tissue in former cancer patients may lead to the reintroduction of malignancy via the graft. Pharmacological ex vivo purging of ovarian cortex fragments prior to autotransplantation may reduce the risk of reseeding the cancer. In this study we have investigated the capacity of Everolimus (EVE), an inhibitor of the mammalian target of rapamycin complex 1 (mTORC1) signaling pathway, to eradicate Ewing’s sarcoma (ES) from ovarian tissue by a short-term ex vivo treatment. Exposure of experimentally induced ES tumor foci in ovarian tissue to EVE for 24 h completely eliminated the malignant cells without detrimental effects on follicle morphology, survival or early folliculogenesis. This indicates that effective purging of ovarian cortex tissue from contaminating ES tumor foci is possible by short-term exposure to EVE.
Collapse
|
9
|
Chimote BN, Chimote NM. Dehydroepiandrosterone sulphate (DHEAS) concentrations stringently regulate fertilisation, embryo development and IVF outcomes: are we looking at a potentially compelling 'oocyte-related factor' in oocyte activation? J Assist Reprod Genet 2020; 38:193-202. [PMID: 33161515 DOI: 10.1007/s10815-020-02001-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Accepted: 11/01/2020] [Indexed: 11/30/2022] Open
Affiliation(s)
- Bindu N Chimote
- IVF Embryology Laboratory, Vaunshdhara Fertility Centre, 9, Dr. Munje Marg, Congress Nagar, Nagpur, Maharashtra, India.
| | - Natachandra M Chimote
- Department of Reproductive Endocrinology, Vaunshdhara Fertility Centre, 9, Dr. Munje Marg, Congress Nagar, Nagpur, Maharashtra, India
| |
Collapse
|
10
|
Ferrero H, Corachán A, Aguilar A, Quiñonero A, Carbajo-García MC, Alamá P, Tejera A, Taboas E, Muñoz E, Pellicer A, Domínguez F. Single-cell RNA sequencing of oocytes from ovarian endometriosis patients reveals a differential transcriptomic profile associated with lower quality. Hum Reprod 2020; 34:1302-1312. [PMID: 31211846 DOI: 10.1093/humrep/dez053] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 01/30/2019] [Indexed: 12/20/2022] Open
Abstract
STUDY QUESTION Do oocytes from women with ovarian endometriosis (OE) have a different transcriptomic profile than those from healthy women? SUMMARY ANSWER Oocytes from endometriosis patients, independently of whether they came from the affected ovary, exhibited a differential transcriptomic profile compared to oocytes from healthy egg donors. WHAT IS KNOWN ALREADY Studies of endometriosis have sought to determine whether OE affects oocyte quality. While many reports indicate that oocytes recovered from endometriotic ovaries may be affected by the disease, other studies have found no significant differences among oocyte/embryo quality and fertilization, implantation and pregnancy rates in women with endometriosis. STUDY DESIGN, SIZE, DURATION This prospective study compared metaphase II (MII) oocytes (n = 16) from endometriosis patients (n = 7) to oocytes (n = 16) from healthy egg donors (n = 5) by single-cell RNA sequencing (scRNA-seq). Participants were recruited between December 2016 and February 2018 at IVI-RMA Valencia and Vigo clinics. PARTICIPANTS/MATERIALS, SETTING, METHODS Human MII oocytes were collected from healthy egg donors and OE patients aged 18-34 years, with a body mass index of <30 and >6 pre-antral follicles. RNA was extracted, cDNA was generated and libraries were constructed and sequenced. scRNA-seq data libraries were processed and statistically analysed. Selected genes were validated by quantitative real-time PCR. MAIN RESULTS AND THE ROLE OF CHANCE Our scRNA-seq results revealed an effect of endometriosis on global transcriptome behaviour in oocytes from endometriotic ovaries. The highest number of differentially expressed genes (DEGs) was found when oocytes from women with OE were compared to oocytes from healthy donors [520 DEGs (394 upregulated and 126 downregulated)], independently of whether oocytes came from an affected or unaffected ovary. Among the top 20 significant DEGs in this comparison, most were upregulated, including APOE, DUSP1, G0S2, H2AFZ, ID4, MGST1 and WEE1. PXK was the only downregulated gene. Subsequently, functional analysis showed 31 enriched functions deregulated in endometriosis patients (Benjamini P < 0.1), being 16 significant enriched functions considering Benjamini P < 0.05, which involved in biological processes and molecular functions, such as steroid metabolism, response to oxidative stress and cell growth regulation. In addition, our functional analysis showed enrichment for mitochondria, which are an important cellular component in oocyte development. Other functions important in embryo development, such as angiogenesis and methylation, were also significantly enriched. LARGE SCALE DATA All raw sequencing data are submitted in Gene Expression Omnibus (GEO) under accession number (PRJNA514416). LIMITATIONS, REASONS FOR CAUTION This study was restricted only to OE and thereby other anatomical entities, such as peritoneal and deep infiltrating endometriosis, were not considered. This is a descriptive study with a limited number of samples reflecting the difficulty to recruit human oocytes, especially from women with endometriosis. WIDER IMPLICATIONS OF THE FINDINGS This study suggests that OE exhibits a global transcriptomic effect on oocytes of patients in OE, independently if they come from an affected or unaffected ovary and alters key biological processes and molecular functions related to steroid metabolism, response to oxidative stress and cell growth regulation, which reduce oocyte quality. STUDY FUNDING/COMPETING INTEREST(S) This research was supported by IVI Foundation, the Spanish Ministry of Economy and Competitiveness through the Miguel Servet programme (CPII018/00002 to F.D.), the Sara Borrell Program (CD15/00057 to H.F.) and the VALi+d Programe (Generalitat Valenciana); ACIF/2016/444 to A.C.). The authors have no conflicts of interest to declare. TRIAL REGISTRATION NUMBER None.
Collapse
Affiliation(s)
- Hortensia Ferrero
- Fundación Instituto Valenciano de Infertilidad, Instituto Universitario IVI, Valencia, Spain.,INCLIVA Biomedical Research Institute, Valencia, Spain
| | - Ana Corachán
- Fundación Instituto Valenciano de Infertilidad, Instituto Universitario IVI, Valencia, Spain.,Department of Pediatrics, Obstetrics and Gynecology, University of Valencia, Valencia, Spain
| | - Alejandra Aguilar
- Instituto Valenciano de Infertilidad-Reproductive Medicine Associates (IVI-RMA), London, UK
| | - Alicia Quiñonero
- Fundación Instituto Valenciano de Infertilidad, Instituto Universitario IVI, Valencia, Spain
| | | | - Pilar Alamá
- Instituto Valenciano de Infertilidad-Reproductive Medicine Associates (IVI-RMA) Valencia, Valencia, Spain
| | - Alberto Tejera
- Instituto Valenciano de Infertilidad-Reproductive Medicine Associates (IVI-RMA) Valencia, Valencia, Spain
| | - Esther Taboas
- Instituto Valenciano de Infertilidad-Reproductive Medicine Associates (IVI-RMA) Valencia, Vigo, Spain
| | - Elkin Muñoz
- Instituto Valenciano de Infertilidad-Reproductive Medicine Associates (IVI-RMA) Valencia, Vigo, Spain
| | - Antonio Pellicer
- Fundación Instituto Valenciano de Infertilidad, Instituto Universitario IVI, Valencia, Spain.,Department of Pediatrics, Obstetrics and Gynecology, University of Valencia, Valencia, Spain
| | - Francisco Domínguez
- Fundación Instituto Valenciano de Infertilidad, Instituto Universitario IVI, Valencia, Spain.,Health Research Institute la Fe, Valencia, Spain
| |
Collapse
|
11
|
Kenda Suster N, Virant-Klun I. Presence and role of stem cells in ovarian cancer. World J Stem Cells 2019; 11:383-397. [PMID: 31396367 PMCID: PMC6682502 DOI: 10.4252/wjsc.v11.i7.383] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/23/2019] [Accepted: 06/13/2019] [Indexed: 02/06/2023] Open
Abstract
Ovarian cancer is the deadliest gynecological malignancy. It is typically diagnosed at advanced stages of the disease, with metastatic sites disseminated widely within the abdominal cavity. Ovarian cancer treatment is challenging due to high disease recurrence and further complicated pursuant to acquired chemoresistance. Cancer stem cell (CSC) theory proposes that both tumor development and progression are driven by undifferentiated stem cells capable of self-renewal and tumor-initiation. The most recent evidence revealed that CSCs in terms of ovarian cancer are not only responsible for primary tumor growth, metastasis and relapse of disease, but also for the development of chemoresistance. As the elimination of this cell population is critical for increasing treatment success, a deeper understanding of ovarian CSCs pathobiology, including epithelial-mesenchymal transition, signaling pathways and tumor microenvironment, is needed. Finally, before introducing new therapeutic agents for ovarian cancer, targeting CSCs, accurate identification of different ovarian stem cell subpopulations, including the very small embryonic-like stem cells suggested as progenitors, is necessary. To these ends, reliable markers of ovarian CSCs should be identified. In this review, we present the current knowledge and a critical discussion concerning ovarian CSCs and their clinical role.
Collapse
Affiliation(s)
- Natasa Kenda Suster
- Department of Gynecology, Division of Obstetrics and Gynecology, University Medical Centre Ljubljana, Ljubljana 1000, Slovenia
| | - Irma Virant-Klun
- Department of Human Reproduction, Division of Obstetrics and Gynecology, University Medical Centre Ljubljana, Ljubljana 1000, Slovenia
| |
Collapse
|
12
|
Similar Population of CD133+ and DDX4+ VSEL-Like Stem Cells Sorted from Human Embryonic Stem Cell, Ovarian, and Ovarian Cancer Ascites Cell Cultures: The Real Embryonic Stem Cells? Cells 2019; 8:cells8070706. [PMID: 31336813 PMCID: PMC6678667 DOI: 10.3390/cells8070706] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 07/07/2019] [Accepted: 07/08/2019] [Indexed: 12/13/2022] Open
Abstract
A population of small stem cells with diameters of up to 5 μm resembling very small embryonic-like stem cells (VSELs) were sorted from human embryonic stem cell (hESC) cultures using magnetic-activated cell sorting (MACS) based on the expression of a stem-cell-related marker prominin-1 (CD133). These VSEL-like stem cells had nuclei that almost filled the whole cell volume and expressed stem-cell-related markers (CD133, SSEA-4) and markers of germinal lineage (DDX4/VASA, PRDM14). They were comparable to similar populations of small stem cells sorted from cell cultures of normal ovaries and were the predominant cells in ascites of recurrent ovarian cancer. The sorted populations of CD133+ VSEL-like stem cells were quiescent in vitro, except for ascites, and were highly activated after exposure to valproic acid and follicle-stimulating hormone (FSH), indicating a new tool to study these cells in vitro. These VSEL-like stem cells spontaneously formed clusters resembling tumour-like structures or grew into larger, oocyte-like cells and were differentiated in vitro into adipogenic, osteogenic and neural lineages after sorting. We propose the population of VSEL-like stem cells from hESC cultures as potential original embryonic stem cells, which are present in the human embryo, persist in adult human ovaries from the embryonic period of life and are involved in cancer manifestation.
Collapse
|
13
|
Virant-Klun I. Functional Testing of Primitive Oocyte-like Cells Developed in Ovarian Surface Epithelium Cell Culture from Small VSEL-like Stem Cells: Can They Be Fertilized One Day? Stem Cell Rev Rep 2019; 14:715-721. [PMID: 29876729 DOI: 10.1007/s12015-018-9832-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Data from the literature show that there are different populations of stem cells present in human adult ovaries, including small stem cells resembling very small embryonic-like stem cells (VSELs). These small ovarian stem cells with diameters of up to 5 μm are present in the ovarian surface epithelium and can grow into bigger, primitive oocyte-like cells that express several markers of a germinal lineage and exhibit pluripotency but not the zona pellucida structure when cultured in vitro. In this report, we present the results of the functional testing of such primitive oocyte-like cells from one patient with premature ovarian failure after insemination with her partners' sperm. Knowing that even immature oocytes collected in an in vitro fertilization program cannot be fertilized naturally, we were only interested in determining whether and how these cells react to added sperm and whether spermatozoa somehow "recognize" them. Interestingly, the primitive oocyte-like cells quickly released a zona pellucida-like structure in the presence of sperm. Two different populations of cells were distinguished, those with a thick and those with a thin zona pellucida-like structure. The primitive oocyte-like cells with a released zona pellucida-like structure expressed the pluripotency-related gene OCT4A (POU5F1) and zona pellucida-related gene ZP3, similar to oocytes obtained from in vitro fertilization but not somatic chondrocytes. In a small proportion of these cells, a single-spermatozoon was observed inside the cytoplasm, but no signs of fertilization were found. These observations may suggest a primitive "cortical reaction". Our data further confirm the presence of germinal stem cells in the ovarian surface epithelium cell culture.
Collapse
Affiliation(s)
- Irma Virant-Klun
- Department of Obstetrics and Gynaecology, University Medical Centre Ljubljana, Slajmerjeva 3, 1000, Ljubljana, Slovenia.
| |
Collapse
|
14
|
Dalman A, Totonchi M, Rezazadeh Valojerdi M. Human Ovarian Theca-Derived Multipotent Stem Cells Have The Potential to Differentiate into Oocyte-Like Cells In Vitro. CELL JOURNAL 2018; 20:527-536. [PMID: 30123999 PMCID: PMC6099133 DOI: 10.22074/cellj.2019.5651] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 01/06/2017] [Indexed: 12/03/2022]
Abstract
Objective In this study, we have examined human theca stem cells (hTSCs) in vitro differentiation capacity into human oocyte
like cells (hOLCs).
Materials and Methods In this interventional experiment study, hTSCs were isolated from the theca layer of small antral
follicles (3-5 mm in size). Isolated hTSCs were expanded and cultured in differentiation medium, containing 5% human follicular
fluid, for 50 days. Gene expressions of PRDM1, PRDM14, VASA, DAZL, OCT4, ZP1, 2, 3 GDF9, SCP3 and DMC1 were
evaluated by quantitative reverse transcription polymerase chain reaction (qRT-PCR) on days 0, 18, and 25 after monoculture
as well as one week after co-culture with human granulosa cells (hGCs). In addition, GDF9, OCT4, DAZL, VASA, and ZP3
proteins were immune-localized in oocyte-like structures.
Results After 16-18 days, the color of the medium became acidic. After 25 days, the cells started to differentiate into
round-shaped cells (20-25 µm diameter). One week after co-culturing with hGCs, the size of the round cells increased
60 to70 µm and convert to hOLCs. However, these growing cells expressed some primordial germ cell (PGC)- and
germ cell genes (PRDM1, PRDM14, VASA, DAZL, and OCT4) as well as oocyte specific genes (ZP1, 2, 3 and GDF9),
and meiotic-specific markers (SCP3 and DMC1). In addition, GDF9, OCT4, DAZL, VASA, and ZP3 proteins were
present in hOLCs.
Conclusion To sum up, hTSCs have the ability to differentiate into hOLCs. This introduced model paved the way for further
in vitro studies of the exact mechanisms behind germ cell formation and differentiation. However, the functionality of hOLCs
needs further investigation.
Collapse
Affiliation(s)
- Azam Dalman
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Mehdi Totonchi
- Department of Anatomical Science, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mojtaba Rezazadeh Valojerdi
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran. Electronic Address: , .,Department of Anatomy, Faculty of Medical Science, Tarbiat Modares University, Tehran, Iran
| |
Collapse
|
15
|
Abstract
Recently, the existence of a mechanism for neo-oogenesis in the ovaries of adult mammals has generated much controversy within reproductive biology. This mechanism, which proposes that the ovary has cells capable of renewing the follicular reserve, has been described for various species of mammals. The first evidence was found in prosimians and humans. However, these findings were not considered relevant because the predominant dogma for reproductive biology at the time was that of Zuckerman. This dogma states that female mammals are born with finite numbers of oocytes that decline throughout postnatal life. Currently, the concept of neo-oogenesis has gained momentum due to the discovery of cells with mitotic activity in adult ovaries of various mammalian species (mice, humans, rhesus monkeys, domestic animals such as pigs, and wild animals such as bats). Despite these reports, the concept of neo-oogenesis has not been widely accepted by the scientific community, generating much criticism and speculation about its accuracy because it has been impossible to reproduce some evidence. This controversy has led to the creation of two positions: one in favour of neo-oogenesis and the other against it. Various animal models have been used in support of both camps, including both classic laboratory animals and domestic and wild animals. The aim of this review is to critically present the current literature on the subject and to evaluate the arguments pro and contra neo-oogenesis in mammals.
Collapse
|
16
|
Expression of markers for germ cells and oocytes in cow dermal fibroblast treated with 5-azacytidine and cultured in differentiation medium containing BMP2, BMP4 or follicular fluid. ZYGOTE 2017; 25:341-357. [DOI: 10.1017/s0967199417000211] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
SummaryThis study aims to investigate the effect 5-azacytidine (5-Aza) during induction of pluripotency in bovine fibroblasts and to evaluate the effects of BMP2, BMP4 or follicular fluid in the differentiation of reprogrammed fibroblasts in primordial germ cells and oocytes. It also analysis the mRNA levels for OCT4, NANOG, REX, SOX2, VASA, DAZL, cKIT, SCP3, ZPA and GDF9 after culturing 5-Aza treated fibroblasts in the different tested medium. Dermal fibroblasts were cultured and exposed to 0.5, 1.0 or 2.0 μM of 5-Aza for 18 h, 36 h or 72 h. Then, the cells were cultured in DMEM/F12 supplemented with 10 ng/ml BMP2, 10 ng/ml BMP4 or 5% follicular fluid. After culture, morphological characteristics, viability and gene expression were evaluated by qPCR. Treatment of skin fibroblasts with 2.0 μM 5-Aza for 72 h significantly increased expression of mRNAs for SOX2, OCT4, NANOG and REX. The culture in medium supplemented with BMP2, BMP4 or follicular fluid for 7 or 14 days induced formation of oocyte-like cells, as well as the expression of markers for germ cells and oocyte. In conclusion, treatment of bovine skin-derived fibroblasts with 2.0 μM 5-Aza for 72 h induces the expression of pluripotency factors. Culturing these cells in differentiation medium supplemented with BMP2, BMP4 or follicular fluid induces morphological changes and promotes expression of markers for germ cells, meiosis and oocyte.
Collapse
|
17
|
Sarhan D, El Mazny A, Taha T, Aziz A, Azmy O, Fakhry D, Torky H. Estradiol and luteinizing hormone concentrations in the follicular aspirate during ovum pickup as predictors of in vitro fertilization (IVF) outcome. MIDDLE EAST FERTILITY SOCIETY JOURNAL 2017. [DOI: 10.1016/j.mefs.2016.09.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
|
18
|
Ye H, Li X, Zheng T, Hu C, Pan Z, Huang J, Li J, Li W, Zheng Y. The Hippo Signaling Pathway Regulates Ovarian Function via the Proliferation of Ovarian Germline Stem Cells. Cell Physiol Biochem 2017; 41:1051-1062. [PMID: 28245464 DOI: 10.1159/000464113] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 12/08/2016] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVE To improve the separation, identification and cultivation of ovarian germline stem cells (OGSCs), to clarify the relationship between the Hippo signaling pathway effector YAP1 and the proliferation and differentiation of OGSCs in vitro and to identify the major contribution of Hippo signaling to ovarian function. METHODS Two-step enzymatic separation processes and magnetic separation were used to isolate and identify OGSCs by determining the expression of Mvh, Oct4, Nanog, Fragilis and Stella markers. Then, YAP1, as the main effector molecule in the Hippo signaling pathway, was chosen as the target gene of the study. Lentivirus containing overexpressed YAP1 or a YAP1-targeted shRNA was transduced into OGSCs. The effects of modulating the Hippo signaling pathway on the proliferation, differentiation, reproduction and endocrine function of ovaries were observed by microinjecting the lentiviral vectors with overexpressed YAP1 or YAP1 shRNA into infertile mouse models or natural mice of reproductive age. RESULTS (1) The specific expression of Mvh, Oct4, Nanog, Fragilis and Stella markers was observed in isolated stem cells. Thus, the isolated cells were preliminarily identified as OGSCs. (2) The co-expression of LATS2, MST1, YAP1 and MVH was observed in isolated OGSCs. Mvh and Oct4 expression levels were significantly increased in OGSCs overexpressing YAP1 compared to GFP controls. Consistently, Mvh and Oct4 levels were significantly decreased in cells expressing YAP1-targeted shRNA. (3) After 14-75 days of YAP1 overexpression in infertile mouse models, we detected follicle regeneration in ovaries, the activation of primordial follicles and increased birth rate, accompanied by increasing levels of E2 and FSH. (4) However, we detected decreasing follicles in ovaries, lower birth rate, and decreasing E2 and FSH in serum from healthy mice of reproductive age following YAP1 shRNA expression. CONCLUSION Methods for the isolation, identification and culture of OGSCs were successfully established. Further results indicate that isolated OGSCs can specifically recognize Hippo signaling molecules and that manipulation of YAP1 expression can be used to regulate the proliferation and differentiation of OGSCs, as well as ovarian function in mice. This study suggests that the Hippo signaling pathway may represent a new molecular target for the regulation of mouse ovarian functional remodeling.
Collapse
|
19
|
Yazdekhasti H, Rajabi Z, Parvari S, Abbasi M. Used protocols for isolation and propagation of ovarian stem cells, different cells with different traits. J Ovarian Res 2016; 9:68. [PMID: 27765047 PMCID: PMC5072317 DOI: 10.1186/s13048-016-0274-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Accepted: 10/03/2016] [Indexed: 11/10/2022] Open
Abstract
Although existence of ovarian stem cells (OSCs) in mammalian postnatal ovary is still under controversy, however, it has been almost accepted that OSCs are contributing actively to folliculogenesis and neo-oogenesis. Recently, various methods with different efficacies have been employed for OSCs isolation from ovarian tissue, which these methods could be chosen depends on aim of isolation and accessible equipments and materials in lab. Although isolated OSCs from different methods have various traits and characterizations, which might become from their different nature and origin, however these stem cells are promising source for woman infertility treatment or source of energy for women with a history of repeat IVF failure in near future. This review has brought together and summarized currently used protocols for isolation and propagation of OSCs in vitro.
Collapse
Affiliation(s)
- Hossein Yazdekhasti
- Department of Anatomy, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Rajabi
- Department of Anatomy, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Soraya Parvari
- Department of Anatomy, Faculty of Medicine, Alborz University of Medical Sciences, Karaj, Iran
| | - Mehdi Abbasi
- Department of Anatomy, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
| |
Collapse
|
20
|
Virant-Klun I, Stimpfel M. Novel population of small tumour-initiating stem cells in the ovaries of women with borderline ovarian cancer. Sci Rep 2016; 6:34730. [PMID: 27703207 PMCID: PMC5050448 DOI: 10.1038/srep34730] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 09/15/2016] [Indexed: 12/12/2022] Open
Abstract
Small stem cells with diameters of up to 5 μm previously isolated from adult human ovaries indicated pluripotency and germinal lineage, especially primordial germ cells, and developed into primitive oocyte-like cells in vitro. Here, we show that a comparable population of small stem cells can be found in the ovarian tissue of women with borderline ovarian cancer, which, in contrast to small stem cells in "healthy" ovaries, formed spontaneous tumour-like structures and expressed some markers related to pluripotency and germinal lineage. The gene expression profile of these small putative cancer stem cells differed from similar cells sorted from "healthy" ovaries by 132 upregulated and 97 downregulated genes, including some important forkhead box and homeobox genes related to transcription regulation, developmental processes, embryogenesis, and ovarian cancer. These putative cancer stem cells are suggested to be a novel population of ovarian tumour-initiating cells in humans.
Collapse
Affiliation(s)
- Irma Virant-Klun
- Department of Obstetrics and Gynaecology, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia
| | - Martin Stimpfel
- Department of Obstetrics and Gynaecology, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia
| |
Collapse
|
21
|
Virant-Klun I, Kenda-Suster N, Smrkolj S. Small putative NANOG, SOX2, and SSEA-4-positive stem cells resembling very small embryonic-like stem cells in sections of ovarian tissue in patients with ovarian cancer. J Ovarian Res 2016; 9:12. [PMID: 26940129 PMCID: PMC4778328 DOI: 10.1186/s13048-016-0221-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Accepted: 02/22/2016] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND In previous studies it has been found that in cell cultures of human adult ovaries there is a population of small stem cells with diameters of 2-4 μm, which are present mainly in the ovarian surface epithelium and are comparable to very small embryonic-like stem cells (VSELs) from bone marrow. These cells are not observed by histopathologists in the ovarian tissue due to their small size and unknown clinical significance. Because these cells express a degree of pluripotency, they might be involved in the manifestation of ovarian cancer. Therefore we studied the ovarian tissue sections in women with borderline ovarian cancer and serous ovarian carcinoma to perhaps identify the small putative stem cells in situ. METHODS In 27 women with borderline ovarian cancer and 20 women with high-grade serous ovarian carcinoma the ovarian tissue sections were stained, per standard practice, with eosin and hematoxylin staining and on NANOG, SSEA-4 and SOX2 markers, related to pluripotency, using immunohistochemistry. We focused on the presence and localization of small putative stem cells with diameters of up to 5 μm and with the nuclei spread over nearly the full cell volume. RESULTS In ovarian sections of both borderline ovarian cancer and serous ovarian carcinoma patients we were able to identify the presence of small round cells complying with the above criteria. Some of these small cells were NANOG-positive, were located among epithelial cells in the ovarian surface epithelium and as a single cell or groups of cells/clusters in typical "chambers", were found only in the presence of ovarian cancer and not in healthy ovaries and are comparable to those in fetal ovaries. We envision that these small cells could be related to NANOG-positive tumor-like structures and oocyte-like cells in similar "chambers" found in sections of cancerous ovaries, which could support their stemness and pluripotency. Further immunohistochemistry revealed a similar population of SSEA-4 and SOX2-positive cells. CONCLUSIONS We may conclude that putative small stem cells expressing markers, related to pluripotency, are present in the ovarian tissue sections of women with borderline ovarian cancer and high-grade serous ovarian carcinoma thus indicating their potential involvement in ovarian cancer.
Collapse
Affiliation(s)
- Irma Virant-Klun
- Department of Obstetrics and Gynaecology, University Medical Centre Ljubljana, Slajmerjeva 3, 1000, Ljubljana, Slovenia.
| | - Natasa Kenda-Suster
- Department of Obstetrics and Gynaecology, University Medical Centre Ljubljana, Slajmerjeva 3, 1000, Ljubljana, Slovenia.
| | - Spela Smrkolj
- Department of Obstetrics and Gynaecology, University Medical Centre Ljubljana, Slajmerjeva 3, 1000, Ljubljana, Slovenia.
| |
Collapse
|
22
|
Virant-Klun I. Very Small Embryonic-Like Stem Cells: A Potential Developmental Link Between Germinal Lineage and Hematopoiesis in Humans. Stem Cells Dev 2015; 25:101-13. [PMID: 26494182 DOI: 10.1089/scd.2015.0275] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
It has been suggested that hematopoietic stem/progenitor cells (HSPCs) could become specified from a population of migrating primordial germ cells (PGCs), precursors of gametes, during embryogenesis. Some recent experimental data demonstrated that the cell population that is usually considered to be PGCs, moving toward the gonadal ridges of an embryo, contains a subset of cells coexpressing several germ cell and hematopoietic markers and possessing hematopoietic activity. Experimental data showed that bone morphogenetic protein 4 (BMP4) generates PGCs from mouse bone marrow-derived pluripotent stem cells. Interestingly, functional reproductive hormone receptors have been identified in HSPCs, thus indicating their potential role in reproductive function. Several reports have demonstrated fertility restoration and germ cell generation after bone marrow transplantation in both animal models and humans. A potential link between HSPCs and germinal lineage might be represented by very small embryonic-like stem cells (VSELs), which have been found in adult human bone marrow, peripheral blood, and umbilical cord blood, express a specific pattern of pluripotency, germinal lineage, and hematopoiesis, and are proposed to persist in adult tissues and organs from the embryonic period of life. Stem cell populations, similar to VSELs, expressing several genes related to pluripotency and germinal lineage, especially to PGCs, have been discovered in adult human reproductive organs, ovaries and testicles, and were related to primitive germ cell-like cell development in vitro, thus supporting the idea of VSELs as a potential link between germinal lineage and hematopoiesis.
Collapse
Affiliation(s)
- Irma Virant-Klun
- Department of Obstetrics and Gynecology, University Medical Center Ljubljana , Ljubljana, Slovenia
| |
Collapse
|
23
|
Identification of New Rat Bone Marrow-Derived Population of Very Small Stem Cell with Oct-4A and Nanog Expression by Flow Cytometric Platforms. Stem Cells Int 2015; 2016:5069857. [PMID: 26633976 PMCID: PMC4655074 DOI: 10.1155/2016/5069857] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 07/05/2015] [Accepted: 07/08/2015] [Indexed: 01/17/2023] Open
Abstract
Very small embryonic-like stem cells (VSELs) represent a unique rare population of adult stem cells (SCs) sharing several structural, genetic, biochemical, and functional properties with embryonic SCs and have been identified in several adult murine and human tissues. However, rat bone marrow- (BM-) derived SCs closely resembling murine or human VSELs have not been described. Thus, we employed multi-instrumental flow cytometric approach including classical and imaging cytometry and we established that newly identified population of nonhematopoietic cells expressing CD106 (VCAM-I) antigen contains SCs with very small size, expressing markers of pluripotency (Oct-4A and Nanog) on both mRNA and protein levels that indicate VSEL population. Based on our experience in both murine and human VSEL isolation procedures by fluorescence-activated cell sorting (FACS), we also optimized sorting protocol for separation of CD45−/Lin−/CD106+ rat BM-derived VSELs from wild type and eGFP-expressing rats, which are often used as donor animals for cell transplantations in regenerative studies in vivo. Thus, this is a first study identifying multiantigenic phenotype and providing sorting protocols for isolation VSELs from rat BM tissue for further examining of their functional properties in vitro as well as regenerative capacity in distinct in vivo rat models of tissue injury.
Collapse
|
24
|
Rodríguez-Iglesias B, Novella-Maestre E, Herraiz S, Díaz-García C, Pellicer N, Pellicer A. New methods to improve the safety assessment of cryopreserved ovarian tissue for fertility preservation in breast cancer patients. Fertil Steril 2015; 104:1493-502.e1-2. [DOI: 10.1016/j.fertnstert.2015.08.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 08/06/2015] [Accepted: 08/06/2015] [Indexed: 12/16/2022]
|
25
|
Bhartiya D, Anand S, Parte S. VSELs may obviate cryobanking of gonadal tissue in cancer patients for fertility preservation. J Ovarian Res 2015; 8:75. [PMID: 26576728 PMCID: PMC4650843 DOI: 10.1186/s13048-015-0199-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 10/27/2015] [Indexed: 01/17/2023] Open
Abstract
Background Infertility is an undesirable side effect and gonadal tissue banking is advocated in young cancer patients who are unable to preserve embryos or gametes prior to oncotherapy to achieve biological parenthood later on. Banking gonadal tissue is challenging and protocols to mature gametes in vitro are not yet clinically established. Transplanting ovarian cortical tissue at hetero-or orthotopic sites in women and bone marrow transplantation (BMT) in both men and women has resulted in spontaneous recovery of fertility, pregnancy and live births. Various studies in humans and mice suggest that genetic origin of offspring after BMT is similar to transplanted patient and not the donor. Thus the source of oocytes/sperm which result in spontaneous pregnancies still remains contentious. Findings Very small embryonic-like stem cells (VSELs) have been reported in adult human testis and ovary, in azoospermic testicular biopsies from survivors of childhood cancer and also in women with premature ovarian failure and menopause. VSELs survive chemotherapy because of their quiescent nature and can be detected in chemoablated mice gonads at protein and mRNA level and also by flow cytometry. Surviving VSELs spontaneously differentiate into oocyte-like structures and sperm when inhibitory factors are overcome in vitro. Transplantation of mesenchymal cells (isolated from different sources) has led to regeneration of chemoablated mouse gonads and also live births. Spermatogenesis is also restored from endogenous stem cells on inter-tubular transplantation of Sertoli cells in chemoablated mouse testis. Conclusions Endogenous VSELs (which survive oncotherapy) can possibly regenerate non-functional gonads in cancer survivors when exposed to a healthy niche in vitro or in vivo (by way of transplanting mesenchymal cells which secrete trophic factors required for endogenous VSELs to differentiate into gametes). Presence of VSELs can also explain spontaneous pregnancies after BMT and cortical tissue transplantation (at heterotopic or orthotopic sites). This understanding once verified and accepted by the scientific community could obviate the need to remove whole ovary or testicular biopsy for cryopreservation prior to oncotherapy.
Collapse
Affiliation(s)
- Deepa Bhartiya
- Stem Cell Biology Department, National Institute for Research in Reproductive Health, JM Street, Parel, Mumbai, 400 012, India.
| | - Sandhya Anand
- Stem Cell Biology Department, National Institute for Research in Reproductive Health, JM Street, Parel, Mumbai, 400 012, India.
| | - Seema Parte
- Stem Cell Biology Department, National Institute for Research in Reproductive Health, JM Street, Parel, Mumbai, 400 012, India.
| |
Collapse
|
26
|
Improvement in Isolation and Identification of Mouse Oogonial Stem Cells. Stem Cells Int 2015; 2016:2749461. [PMID: 26635882 PMCID: PMC4655301 DOI: 10.1155/2016/2749461] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Revised: 06/19/2015] [Accepted: 06/22/2015] [Indexed: 01/16/2023] Open
Abstract
Female germline stem cells (FGSCs) or oogonial stem cells (OSCs) have the capacity to generate newborn oocytes and thus open a new door to fight ovarian aging and female infertility. However, the production and identification of OSCs are difficult for investigators. Rare amount of these cells in the ovary results in the failure of the acquisition of OSCs. Furthermore, the oocyte formation by OSCs in vivo was usually confirmed using tissue sections by immunofluorescence or immunohistochemistry in previous studies. STO or MEF feeder cells are derived from mouse, not human. In our study, we modified the protocol. The cells were digested from ovaries and cultured for 2-3 days and then were purified by magnetic-activated cell sorting (MACS). The ovaries and fetus of mice injected with EGFP-positive OSCs were prepared and put on the slides to directly visualize oocyte and progeny formation under microscope. Additionally, the human umbilical cord mesenchymal stem cells (hUC-MSCs) were also used as feeder cells to support the proliferation of OSCs. The results showed that all the modified procedures can significantly improve and facilitate the generation and characterization of OSCs, and hUC-MSCs as feeder will be useful for isolation and proliferation of human OSCs avoiding contamination from mouse.
Collapse
|
27
|
Novel Action of FSH on Stem Cells in Adult Mammalian Ovary Induces Postnatal Oogenesis and Primordial Follicle Assembly. Stem Cells Int 2015; 2016:5096596. [PMID: 26635884 PMCID: PMC4655292 DOI: 10.1155/2016/5096596] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 06/08/2015] [Indexed: 01/27/2023] Open
Abstract
Adult mammalian ovary has been under the scanner for more than a decade now since it was proposed to harbor stem cells that undergo postnatal oogenesis during reproductive period like spermatogenesis in testis. Stem cells are located in the ovary surface epithelium and exist in adult and menopausal ovary as well as in ovary with premature failure. Stem cells comprise two distinct populations including spherical, very small embryonic-like stem cells (VSELs which express nuclear OCT-4 and other pluripotent and primordial germ cells specific markers) and slightly bigger ovarian germ stem cells (OGSCs with cytoplasmic OCT-4 which are equivalent to spermatogonial stem cells in the testes). These stem cells have the ability to spontaneously differentiate into oocyte-like structures in vitro and on exposure to a younger healthy niche. Bone marrow may be an alternative source of these stem cells. The stem cells express FSHR and respond to FSH by undergoing self-renewal, clonal expansion, and initiating neo-oogenesis and primordial follicle assembly. VSELs are relatively quiescent and were recently reported to survive chemotherapy and initiate oogenesis in mice when exposed to FSH. This emerging understanding and further research in the field will help evolving novel strategies to manage ovarian pathologies and also towards oncofertility.
Collapse
|
28
|
Abstract
In spite of generally accepted dogma that the total number of follicles and oocytes is established in human ovaries during the fetal period of life rather than forming de novo in adult ovaries, some new evidence in the field challenges this understanding. Several studies have shown that different populations of stem cells, such as germinal stem cells and small round stem cells with diameters of 2 to 4 μm, that resembled very small embryonic-like stem cells and expressed several genes related to primordial germ cells, pluripotency, and germinal lineage are present in adult human ovaries and originate in ovarian surface epithelium. These small stem cells were pushed into the germinal direction of development and formed primitive oocyte-like cells in vitro. Moreover, oocyte-like cells were also formed in vitro from embryonic stem cells and induced pluripotent stem cells. This indicates that postnatal oogenesis is not excluded. It is further supported by the occurrence of mesenchymal stem cells that can restore the function of sterilized ovaries and lead to the formation of new follicles and oocytes in animal models. Both oogenesis in vitro and transplantation of stem cell-derived "oocytes" into the ovarian niche to direct their natural maturation represent a big challenge for reproductive biomedicine in the treatment of female infertility in the future and needs to be explored and interpreted with caution, but it is still very important for clinical practice in the field of reproductive medicine.
Collapse
Affiliation(s)
- Irma Virant-Klun
- Department of Obstetrics and Gynaecology, University Medical Center Ljubljana, Ljubljana, Slovenia
| |
Collapse
|
29
|
Hummitzsch K, Anderson RA, Wilhelm D, Wu J, Telfer EE, Russell DL, Robertson SA, Rodgers RJ. Stem cells, progenitor cells, and lineage decisions in the ovary. Endocr Rev 2015; 36:65-91. [PMID: 25541635 PMCID: PMC4496428 DOI: 10.1210/er.2014-1079] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Accepted: 12/15/2014] [Indexed: 01/05/2023]
Abstract
Exploring stem cells in the mammalian ovary has unleashed a Pandora's box of new insights and questions. Recent evidence supports the existence of stem cells of a number of the different cell types within the ovary. The evidence for a stem cell model producing mural granulosa cells and cumulus cells is strong, despite a limited number of reports. The recent identification of a precursor granulosa cell, the gonadal ridge epithelial-like cell, is exciting and novel. The identification of female germline (oogonial) stem cells is still very new and is currently limited to just a few species. Their origins and physiological roles, if any, are unknown, and their potential to produce oocytes and contribute to follicle formation in vivo lacks robust evidence. The precursor of thecal cells remains elusive, and more compelling data are needed. Similarly, claims of very small embryonic-like cells are also preliminary. Surface epithelial cells originating from gonadal ridge epithelial-like cells and from the mesonephric epithelium at the hilum of the ovary have also been proposed. Another important issue is the role of the stroma in guiding the formation of the ovary, ovigerous cords, follicles, and surface epithelium. Immune cells may also play key roles in developmental patterning, given their critical roles in corpora lutea formation and regression. Thus, while the cellular biology of the ovary is extremely important for its major endocrine and fertility roles, there is much still to be discovered. This review draws together the current evidence and perspectives on this topic.
Collapse
Affiliation(s)
- Katja Hummitzsch
- Discipline of Obstetrics and Gynaecology (K.H., D.L.R., S.A.R., R.J.R.), School of Paediatrics and Reproductive Health, Robinson Research Institute, University of Adelaide, Adelaide, South Australia, Australia 5005; Medical Research Council Centre for Reproductive Health (R.A.A.), The University of Edinburgh, The Queens Medical Research Institute, Edinburgh EH16 4TJ, United Kingdom; Department of Anatomy and Developmental Biology (D.W.), Monash University, Clayton, Victoria, Australia 3800; Bio-X Institutes (J.W.), Shanghai Jiao Tong University, Shanghai 200240, China; and Institute of Cell Biology and Centre for Integrative Physiology (E.E.T), The University of Edinburgh, Edinburgh EH8 9XE, United Kingdom
| | | | | | | | | | | | | | | |
Collapse
|
30
|
Ahmed N, Abubaker K, Findlay JK. Ovarian cancer stem cells: Molecular concepts and relevance as therapeutic targets. Mol Aspects Med 2014; 39:110-25. [DOI: 10.1016/j.mam.2013.06.002] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 06/12/2013] [Accepted: 06/14/2013] [Indexed: 12/12/2022]
|
31
|
Gheorghisan-Galateanu AA, Hinescu ME, Enciu AM. Ovarian adult stem cells: hope or pitfall? J Ovarian Res 2014; 7:71. [PMID: 25018783 PMCID: PMC4094411 DOI: 10.1186/1757-2215-7-71] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2014] [Accepted: 06/29/2014] [Indexed: 12/22/2022] Open
Abstract
For many years, ovarian biology has been based on the dogma that oocytes reserve in female mammals included a finite number, established before or at birth and it is determined by the number and quality of primordial follicles developed during the neonatal period. The restricted supply of oocytes in adult female mammals has been disputed in recent years by supporters of postnatal neo-oogenesis. Recent experimental data showed that ovarian surface epithelium and cortical tissue from both mouse and human were proved to contain very low proportion of cells able to propagate themselves, but also to generate immature oocytes in vitro or in vivo, when transplanted into immunodeficient mice ovaries. By mentioning several landmarks of ovarian stem cell reserve and addressing the exciting perspective of translation into clinical practice as treatment for infertility pathologies, the purpose of this article is to review the knowledge about adult mammalian ovarian stem cells, a topic that, since the first approach quickly attracted the attention of both the scientific media and patients.
Collapse
Affiliation(s)
- Ancuta Augustina Gheorghisan-Galateanu
- Department of Cellular and Molecular Medicine, Carol Davila University of Medicine and Pharmacy, 8 Eroii Sanitari Blvd., 050474 Bucharest, Romania ; C.I.Parhon National Institute of Endocrinology, 8 Eroii Sanitari Blvd., 050474 Bucharest, Romania
| | - Mihail Eugen Hinescu
- Department of Cellular and Molecular Medicine, Carol Davila University of Medicine and Pharmacy, 8 Eroii Sanitari Blvd., 050474 Bucharest, Romania ; V.Babes National Institute of Pathology, 8 Eroii Sanitari Blvd., 050474 Bucharest, Romania
| | - Ana Maria Enciu
- Department of Cellular and Molecular Medicine, Carol Davila University of Medicine and Pharmacy, 8 Eroii Sanitari Blvd., 050474 Bucharest, Romania ; V.Babes National Institute of Pathology, 8 Eroii Sanitari Blvd., 050474 Bucharest, Romania
| |
Collapse
|
32
|
Single blastomere expression profiling of Xenopus laevis embryos of 8 to 32-cells reveals developmental asymmetry. Sci Rep 2014; 3:2278. [PMID: 23880666 PMCID: PMC3721081 DOI: 10.1038/srep02278] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 07/05/2013] [Indexed: 12/24/2022] Open
Abstract
We have measured the expression of 41 maternal mRNAs in individual blastomeres collected from the 8 to 32-cell Xenopus laevis embryos to determine when and how asymmetry in the body plan is introduced. We demonstrate that the asymmetry along the animal-vegetal axis in the oocyte is transferred to the daughter cells during early cell divisions. All studied mRNAs are distributed evenly among the set of animal as well as vegetal blastomeres. We find no asymmetry in mRNA levels that might be ascribed to the dorso-ventral specification or the left-right axis formation. We hypothesize that while the animal-vegetal asymmetry is a consequence of mRNA gradients, the dorso-ventral and left-right axes specifications are induced by asymmetric distribution of other biomolecules, probably proteins.
Collapse
|
33
|
Suszynska M, Zuba-Surma EK, Maj M, Mierzejewska K, Ratajczak J, Kucia M, Ratajczak MZ. The proper criteria for identification and sorting of very small embryonic-like stem cells, and some nomenclature issues. Stem Cells Dev 2014; 23:702-13. [PMID: 24299281 DOI: 10.1089/scd.2013.0472] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Evidence has accumulated that both murine and human adult tissues contain early-development stem cells with a broader differentiation potential than other adult monopotent stem cells. These cells, being pluripotent or multipotent, exist at different levels of specification and most likely represent overlapping populations of cells that, depending on the isolation strategy, ex vivo expansion protocol, and markers employed for their identification, have been given different names. In this review, we will discuss a population of very small embryonic-like stem cells (VSELs) in the context of other stem cells that express pluripotent/multipotent markers isolated from adult tissues as well as review the most current, validated working criteria on how to properly identify and isolate these very rare cells. VSELs have been successfully purified in several laboratories; however, a few have failed to isolate them, which has raised some unnecessary controversy in the field. Therefore, in this short review, we will address the most important reasons that some investigators have experienced problems in isolating these very rare cells and discuss some still unresolved challenges which should be overcome before these cells can be widely employed in the clinic.
Collapse
Affiliation(s)
- Malwina Suszynska
- 1 Stem Cell Institute at the James Graham Brown Cancer Center, University of Louisville , Louisville, Kentucky
| | | | | | | | | | | | | |
Collapse
|
34
|
Abstract
SummaryFor decades, scientists have considered that female mammals are born with a lifetime reserve of oocytes in the ovary, irrevocably fated to decline after birth. However, controversy in the matter of the possible presence of oocytes and granulosa cells that originate from stem cells in the adult mammalian ovaries has been expanded. The restricted supply of oocytes in adult female mammals has been disputed in recent years by supporters of neo-oogenesis, who claim that germline stem cells (GSCs) exist in the ovarian surface epithelium (OSE) or the bone marrow (BM). Differentiation of ovarian stem cells (OSCs) into oocytes, fibroblast-like cells, granulosa phenotype, neural and mesenchymal type cells and generation of germ cells from OSCs under the contribution of an OSC niche that consists of immune system-related cells and hormonal signalling has been claimed. Although these arguments have met with intense suspicion, their confirmation would necessitate the revision of the current classic knowledge of female reproductive biology.
Collapse
|