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Pasquariello R, Bogliolo L, Di Filippo F, Leoni GG, Nieddu S, Podda A, Brevini TAL, Gandolfi F. Use of assisted reproductive technologies (ARTs) to shorten the generational interval in ruminants: current status and perspectives. Theriogenology 2024; 225:16-32. [PMID: 38788626 DOI: 10.1016/j.theriogenology.2024.05.026] [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: 03/05/2024] [Revised: 05/18/2024] [Accepted: 05/18/2024] [Indexed: 05/26/2024]
Abstract
The challenges posed by climate change and increasing world population are stimulating renewed efforts for improving the sustainability of animal production. To meet such challenges, the contribution of genomic selection approaches, in combination with assisted reproductive technologies (ARTs), to spreading and preserving animal genetics is essential. The largest increase in genetic gain can be achieved by shortening the generation interval. This review provides an overview of the current status and progress of advanced ARTs that could be applied to reduce the generation time in both female and male of domestic ruminants. In females, the use of juvenile in vitro embryo transfer (JIVET) enables to generate offspring after the transfer of in vitro produced embryos derived from oocytes of prepubertal genetically superior donors reducing the generational interval and acceleration genetic gain. The current challenge is increasing in vitro embryo production (IVEP) from prepubertal derived oocytes which is still low and variable. The two main factors limiting IVEP success are the intrinsic quality of prepubertal oocytes and the culture systems for in vitro maturation (IVM). In males, advancements in ARTs are providing new strategies to in vitro propagate spermatogonia and differentiate them into mature sperm or even to recapitulate the whole process of spermatogenesis from embryonic stem cells. Moreover, the successful use of immature cells, such as round spermatids, for intracytoplasmic injection (ROSI) and IVEP could allow to complete the entire process in few months. However, these approaches have been successfully applied to human and mouse whereas only a few studies have been published in ruminants and results are still controversial. This is also dependent on the efficiency of ROSI that is limited by the current isolation and selection protocols of round spermatids. In conclusion, the current efforts for improving these reproductive methodologies could lead toward a significant reduction of the generational interval in livestock animals that could have a considerable impact on agriculture sustainability.
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Affiliation(s)
- Rolando Pasquariello
- Department of Agricultural and Environmental Sciences, University of Milan, Milano, Italy
| | - Luisa Bogliolo
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
| | - Francesca Di Filippo
- Department of Agricultural and Environmental Sciences, University of Milan, Milano, Italy
| | | | - Stefano Nieddu
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
| | - Andrea Podda
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
| | - Tiziana A L Brevini
- Laboratory of Biomedical Embryology and Tissue Engineering, Department of Veterinary Medicine and Animal Science, University of Milan, Lodi, Italy
| | - Fulvio Gandolfi
- Department of Agricultural and Environmental Sciences, University of Milan, Milano, Italy.
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Gizer M, Önen S, Korkusuz P. The Evolutionary Route of in vitro Human Spermatogenesis: What is the Next Destination? Stem Cell Rev Rep 2024:10.1007/s12015-024-10726-2. [PMID: 38684571 DOI: 10.1007/s12015-024-10726-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/10/2024] [Indexed: 05/02/2024]
Abstract
Malfunction in spermatogenesis due to genetic diseases, trauma, congenital disorders or gonadotoxic treatments results in infertility in approximately 7% of males. The behavior of spermatogonial stem cells (SSCs) within three-dimensional, multifactorial, and dynamic microenvironment implicates a niche that serves as a repository for fertility, since can serve as a source of mature and functional male germ cells. Current protocols enable reprogramming of mature somatic cells into induced pluripotent stem cells (iPSCs) and their limited differentiation to SSCs within the range of 0-5%. However, the resulting human iPSC-derived haploid spermatogenic germ cell yield in terms of number and functionality is currently insufficient for transfer to infertility clinic as a therapeutic tool. In this article, we reviewed the evolution of experimental culture platforms and introduced a novel iPSCs-based approach for in vitro spermatogenesis based on a niche perspective bearing cellular, chemical, and physical factors that provide the complex arrangement of testicular seminiferous tubules embedded within a vascularized stroma. We believe that bioengineered organoids supported by smart bio-printed tubules and microfluidic organ-on-a-chip systems offer efficient, precise, personalized platforms for autologous pluripotent stem cell sources to undergo the spermatogenetic cycle, presenting a promising tool for infertile male patients with complete testicular aplasia.
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Affiliation(s)
- Merve Gizer
- Department of Stem Cell Sciences, Graduate School of Health Sciences, Hacettepe University, 06100, Ankara, Turkey
- METU MEMS Center, 06530, Ankara, Turkey
| | | | - Petek Korkusuz
- METU MEMS Center, 06530, Ankara, Turkey.
- Department of Histology and Embryology, Faculty of Medicine, Hacettepe University, Sihhiye, 06100, Ankara, Turkey.
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Nikmahzar A, Koruji M, Jahanshahi M, Khadivi F, Shabani M, Dehghani S, Forouzesh M, Jabari A, Feizollahi N, Salem M, Ghanami Gashti N, Abbasi Y, Abbasi M. Differentiation of human primary testicular cells in the presence of SCF using the organoid culture system. Artif Organs 2023; 47:1818-1830. [PMID: 37698035 DOI: 10.1111/aor.14643] [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: 04/11/2023] [Revised: 08/01/2023] [Accepted: 08/09/2023] [Indexed: 09/13/2023]
Abstract
PURPOSE Development of organoids using human primary testicular cells has remained a challenge due to the complexity of the mammalian testicular cytoarchitecture and culture methods. In this study, we generated testicular organoids derived from human primary testicular cells. Then, we evaluated the effect of stem cell factor (SCF) on cell differentiation and apoptosis in the testicular organoid model. METHODS The testicular cells were harvested from the three brain-dead donors. Human spermatogonial stem cells (SSCs) were characterized using immunocytochemistry (ICC), RT-PCR and flow cytometry. Testicular organoids were generated from primary testicular cells by hanging drop culture method and were cultured in three groups: control group, experimental group 1 (treated FSH and retinoic acid (RA)), and experimental group 2 (treated FSH, RA and SCF), for five weeks. We assessed the expression of SCP3 (Synaptonemal Complex Protein 3) as a meiotic gene, PRM2 (Protamine 2) as a post-meiotic marker and apoptotic genes of Bax (BCL2-Associated X Protein) and Bcl-2 (B-cell lymphoma 2), respectively by using RT-qPCR. In addition, we identified the expression of PRM2 by immunohistochemistry (IHC). RESULTS Relative expression of SCP3, PRM2 and Bcl-2 were highest in group 2 after five weeks of culture. In contrast, BAX expression level was lower in experimental group 2 in comparison with other groups. IHC analyses indicated the highest expression of PRM2 as a postmeiotic marker in group 2 in comparison to 2D culture and control groups but not find significant differences between experimental group 1 and experimental group 2 groups. Morphological evaluations revealed that organoids are compact spherical structures and in the peripheral region composed of uncharacterized elongated fibroblast-like cells. CONCLUSION Our findings revealed that the testicular organoid culture system promote the spermatogonial stem cell (SSC) differentiation, especially in presence of SCF. Developed organoids are capable of recapitulating many important properties of a stem cell niche.
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Affiliation(s)
- Aghbibi Nikmahzar
- Department of Anatomy, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Morteza Koruji
- Stem Cell and Regenerative Medicine Center & Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mehrdad Jahanshahi
- Neuroscience Research Center, Department of Anatomy, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran
| | - Farnaz Khadivi
- Department of Anatomy, School of Medicine, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Maryam Shabani
- Department of Anatomy, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Sanaz Dehghani
- Organ Procurement Unit, Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehdi Forouzesh
- Legal Medicine Organization of Iran, Legal Medicine Research Center, Legal Medicine Organization, Tehran, Iran
| | - Ayob Jabari
- Department of Anatomy, Zahedan Medical University of Science, Zahedan, Iran
| | - Narjes Feizollahi
- Department of Anatomy, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Salem
- Department of Anatomy, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Yasaman Abbasi
- Program in Neuroscience, Center to Advance Chronic Pain Research, Department of Neural and Pain Sciences, School of Dentistry, University of Maryland, Baltimore, Maryland, USA
| | - Mehdi Abbasi
- Department of Anatomy, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Salem M, Khadivi F, Javanbakht P, Mojaverrostami S, Abbasi M, Feizollahi N, Abbasi Y, Heidarian E, Rezaei Yazdi F. Advances of three-dimensional (3D) culture systems for in vitro spermatogenesis. Stem Cell Res Ther 2023; 14:262. [PMID: 37735437 PMCID: PMC10512562 DOI: 10.1186/s13287-023-03466-6] [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: 09/26/2022] [Accepted: 08/22/2023] [Indexed: 09/23/2023] Open
Abstract
The loss of germ cells and spermatogenic failure in non-obstructive azoospermia are believed to be the main causes of male infertility. Laboratory studies have used in vitro testicular models and different 3-dimensional (3D) culture systems for preservation, proliferation and differentiation of spermatogonial stem cells (SSCs) in recent decades. The establishment of testis-like structures would facilitate the study of drug and toxicity screening, pathological mechanisms and in vitro differentiation of SSCs which resulted in possible treatment of male infertility. The different culture systems using cellular aggregation with self-assembling capability, the use of different natural and synthetic biomaterials and various methods for scaffold fabrication provided a suitable 3D niche for testicular cells development. Recently, 3D culture models have noticeably used in research for their architectural and functional similarities to native microenvironment. In this review article, we briefly investigated the recent 3D culture systems that provided a suitable platform for male fertility preservation through organ culture of testis fragments, proliferation and differentiation of SSCs.
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Affiliation(s)
- Maryam Salem
- Department of Anatomy, School of Medicine, Tehran University of Medical Science, Tehran, Iran
| | - Farnaz Khadivi
- Medical Plants Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran.
- Department of Anatomy, School of Medicine, Shahrekord University of Medical Sciences, Shahrekord, Iran.
| | - Parinaz Javanbakht
- Department of Anatomy, School of Medicine, Tehran University of Medical Science, Tehran, Iran
| | - Sina Mojaverrostami
- Department of Anatomy, School of Medicine, Tehran University of Medical Science, Tehran, Iran
| | - Mehdi Abbasi
- Department of Anatomy, School of Medicine, Tehran University of Medical Science, Tehran, Iran
| | - Narjes Feizollahi
- Department of Anatomy, School of Medicine, Tehran University of Medical Science, Tehran, Iran
| | - Yasaman Abbasi
- School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Ehsan Heidarian
- Department of Anatomy, School of Medicine, Tehran University of Medical Science, Tehran, Iran
| | - Farzane Rezaei Yazdi
- Department of Anatomy, School of Medicine, Tehran University of Medical Science, Tehran, Iran
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Bashiri Z, Moghaddaszadeh A, Falak R, Khadivi F, Afzali A, Abbasi M, Sharifi AM, Asgari HR, Ghanbari F, Koruji M. Generation of Haploid Spermatids on Silk Fibroin-Alginate-Laminin-Based Porous 3D Scaffolds. Macromol Biosci 2023; 23:e2200574. [PMID: 37116215 DOI: 10.1002/mabi.202200574] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 04/03/2023] [Indexed: 04/30/2023]
Abstract
In vitro production of sperm is a desirable idea for fertility preservation in azoospermic men and prepubertal boys suffering from cancer. In this study, a biocompatible porous scaffold based on a triad mixture of silk fibroin (SF), alginate (Alg), and laminin (LM) is developed to facilitate the differentiation of mouse spermatogonia stem cells (SSCs). Following SF extraction, the content is analyzed by SDS-PAGE and stable porous 3D scaffolds are successfully prepared by merely Alg, SF, and a combination of Alg-SF, or Alg-SF-LM through freeze-drying. Then, the biomimetic scaffolds are characterized regarding the structural and biological properties, water absorption capacity, biocompatibility, biodegradability, and mechanical behavior. Neonatal mice testicular cells are seeded on three-dimensional scaffolds and their differentiation efficiency is evaluated using real-time PCR, flow cytometry, immunohistochemistry. Blend matrices showed uniform porous microstructures with interconnected networks, which maintained long-term stability and mechanical properties better than homogenous structures. Molecular analysis of the cells after 21 days of culture showed that the expression of differentiation-related proteins in cells that are developed in composite scaffolds is significantly higher than in other groups. The application of a composite system can lead to the differentiation of SSCs, paving the way for a novel infertility treatment landscape in the future.
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Affiliation(s)
- Zahra Bashiri
- Stem cell and Regenerative Medicine Research Center, Iran University of Medical Sciences, Tehran, 1449614535, Iran
- Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, 1449614535, Iran
- Omid Fertility & Infertility Clinic, Hamedan, 6516796198, Iran
| | - Ali Moghaddaszadeh
- Departement of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, 1477893855, Iran
| | - Reza Falak
- Immunology Research Center (IRC), Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, 1449614535, Iran
| | - Farnaz Khadivi
- Department of Anatomy, School of Medicine, Shahrekord University of Medical Sciences, Shahrekord, 8815713471, Iran
| | - Azita Afzali
- Hajar hospital, Shahrekord University of Medical Sciences, Shahrekord, 8816854633, Iran
| | - Mehdi Abbasi
- Department of Anatomy, School of Medicine, Tehran University of Medical Sciences, Tehran, 1417653761, Iran
| | - Ali Mohammad Sharifi
- Stem cell and Regenerative Medicine Research Center, Iran University of Medical Sciences, Tehran, 1449614535, Iran
- Tissue Engineering Group (NOCERAL), Department of Orthopedics Surgery, Faculty of Medicine, University of Malaya, Kuala Lumpur, 50603, Malaysia
| | - Hamid Reza Asgari
- Stem cell and Regenerative Medicine Research Center, Iran University of Medical Sciences, Tehran, 1449614535, Iran
- Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, 1449614535, Iran
| | - Farid Ghanbari
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, 1449614535, Iran
| | - Morteza Koruji
- Stem cell and Regenerative Medicine Research Center, Iran University of Medical Sciences, Tehran, 1449614535, Iran
- Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, 1449614535, Iran
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Hau RK, Wright SH, Cherrington NJ. In Vitro and In Vivo Models for Drug Transport Across the Blood-Testis Barrier. Drug Metab Dispos 2023; 51:1157-1168. [PMID: 37258305 PMCID: PMC10449102 DOI: 10.1124/dmd.123.001288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 05/10/2023] [Accepted: 05/25/2023] [Indexed: 06/02/2023] Open
Abstract
The blood-testis barrier (BTB) is a selectively permeable membrane barrier formed by adjacent Sertoli cells (SCs) in the seminiferous tubules of the testes that develops intercellular junctional complexes to protect developing germ cells from external pressures. However, due to this inherent defense mechanism, the seminiferous tubule lumen can act as a pharmacological sanctuary site for latent viruses (e.g., Ebola, Zika) and cancers (e.g., leukemia). Therefore, it is critical to identify and evaluate BTB carrier-mediated drug delivery pathways to successfully treat these viruses and cancers. Many drugs are unable to effectively cross cell membranes without assistance from carrier proteins like transporters because they are large, polar, and often carry a charge at physiologic pH. SCs express transporters that selectively permit endogenous compounds, such as carnitine or nucleosides, across the BTB to support normal physiologic activity, although reproductive toxicants can also use these pathways, thereby circumventing the BTB. Certain xenobiotics, including select cancer therapeutics, antivirals, contraceptives, and environmental toxicants, are known to accumulate within the male genital tract and cause testicular toxicity; however, the transport pathways by which these compounds circumvent the BTB are largely unknown. Consequently, there is a need to identify the clinically relevant BTB transport pathways in in vitro and in vivo BTB models that recapitulate human pharmacokinetics and pharmacodynamics for these xenobiotics. This review summarizes the various in vitro and in vivo models of the BTB reported in the literature and highlights the strengths and weaknesses of certain models for drug disposition studies. SIGNIFICANCE STATEMENT: Drug disposition to the testes is influenced by the physical, physiological, and immunological components of the blood-testis barrier (BTB). But many compounds are known to cross the BTB by transporters, resulting in pharmacological and/or toxicological effects in the testes. Therefore, models that assess drug transport across the human BTB must adequately account for these confounding factors. This review identifies and discusses the benefits and limitations of various in vitro and in vivo BTB models for preclinical drug disposition studies.
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Affiliation(s)
- Raymond K Hau
- College of Pharmacy, Department of Pharmacology & Toxicology, (R.K.H., N.J.C.) and College of Medicine, Department of Physiology, The University of Arizona, Tucson, Arizona (S.H.W.)
| | - Stephen H Wright
- College of Pharmacy, Department of Pharmacology & Toxicology, (R.K.H., N.J.C.) and College of Medicine, Department of Physiology, The University of Arizona, Tucson, Arizona (S.H.W.)
| | - Nathan J Cherrington
- College of Pharmacy, Department of Pharmacology & Toxicology, (R.K.H., N.J.C.) and College of Medicine, Department of Physiology, The University of Arizona, Tucson, Arizona (S.H.W.)
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Juraski AC, Sharma S, Sparanese S, da Silva VA, Wong J, Laksman Z, Flannigan R, Rohani L, Willerth SM. 3D bioprinting for organ and organoid models and disease modeling. Expert Opin Drug Discov 2023; 18:1043-1059. [PMID: 37431937 DOI: 10.1080/17460441.2023.2234280] [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: 02/24/2023] [Accepted: 07/05/2023] [Indexed: 07/12/2023]
Abstract
INTRODUCTION 3D printing, a versatile additive manufacturing technique, has diverse applications ranging from transportation, rapid prototyping, clean energy, and medical devices. AREAS COVERED The authors focus on how 3D printing technology can enhance the drug discovery process through automating tissue production that enables high-throughput screening of potential drug candidates. They also discuss how the 3D bioprinting process works and what considerations to address when using this technology to generate cell laden constructs for drug screening as well as the outputs from such assays necessary for determining the efficacy of potential drug candidates. They focus on how bioprinting how has been used to generate cardiac, neural, and testis tissue models, focusing on bio-printed 3D organoids. EXPERT OPINION The next generation of 3D bioprinted organ model holds great promises for the field of medicine. In terms of drug discovery, the incorporation of smart cell culture systems and biosensors into 3D bioprinted models could provide highly detailed and functional organ models for drug screening. By addressing current challenges of vascularization, electrophysiological control, and scalability, researchers can obtain more reliable and accurate data for drug development, reducing the risk of drug failures during clinical trials.
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Affiliation(s)
- Amanda C Juraski
- Department of Mechanical Engineering, University of Victoria, Victoria, BC, Canada
- Division of Medical Sciences, University of Victoria, Victoria BC, Canada
- Department of Chemical Engineering, Polytechnic School, University of Sao Paulo, Sao Paulo, Brazil
| | - Sonali Sharma
- Faculty of Medicine, School of Biomedical Engineering, University of British Columbia, Vancouver, BC, Canada
| | - Sydney Sparanese
- Faculty of Medicine, School of Biomedical Engineering, University of British Columbia, Vancouver, BC, Canada
- Department of Urologic Sciences, University of British Columbia, Vancouver BC, Canada
| | - Victor A da Silva
- Department of Mechanical Engineering, University of Victoria, Victoria, BC, Canada
- Division of Medical Sciences, University of Victoria, Victoria BC, Canada
| | - Julie Wong
- Department of Urologic Sciences, University of British Columbia, Vancouver BC, Canada
| | - Zachary Laksman
- Faculty of Medicine, School of Biomedical Engineering, University of British Columbia, Vancouver, BC, Canada
| | - Ryan Flannigan
- Department of Urologic Sciences, University of British Columbia, Vancouver BC, Canada
| | - Leili Rohani
- Faculty of Medicine, School of Biomedical Engineering, University of British Columbia, Vancouver, BC, Canada
| | - Stephanie M Willerth
- Department of Mechanical Engineering, University of Victoria, Victoria, BC, Canada
- Division of Medical Sciences, University of Victoria, Victoria BC, Canada
- Faculty of Medicine, School of Biomedical Engineering, University of British Columbia, Vancouver, BC, Canada
- Centre for Advanced Materials and Related Technology (CAMTEC), University of Victoria, Victoria, BC, Canada
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Human in vitro spermatogenesis as a regenerative therapy - where do we stand? Nat Rev Urol 2023:10.1038/s41585-023-00723-4. [PMID: 36750655 DOI: 10.1038/s41585-023-00723-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/04/2023] [Indexed: 02/09/2023]
Abstract
Spermatogenesis involves precise temporal and spatial gene expression and cell signalling to reach a coordinated balance between self-renewal and differentiation of spermatogonial stem cells through various germ cell states including mitosis, and meiosis I and II, which result in the generation of haploid cells with a unique genetic identity. Subsequently, these round spermatids undergo a series of morphological changes to shed excess cytoplast, develop a midpiece and tail, and undergo DNA repackaging to eventually form millions of spermatozoa. The goal of recreating this process in vitro has been pursued since the 1920s as a tool to treat male factor infertility in patients with azoospermia. Continued advances in reproductive bioengineering led to successful generation of mature, functional sperm in mice and, in the past 3 years, in humans. Multiple approaches to study human in vitro spermatogenesis have been proposed, but technical and ethical obstacles have limited the ability to complete spermiogenesis, and further work is needed to establish a robust culture system for clinical application.
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Yang W, Zhang C, Wu YH, Liu LB, Zhen ZD, Fan DY, Song ZR, Chang JT, Wang PG, An J. Mice 3D testicular organoid system as a novel tool to study Zika virus pathogenesis. Virol Sin 2023; 38:66-74. [PMID: 36241087 PMCID: PMC10006202 DOI: 10.1016/j.virs.2022.10.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 10/08/2022] [Indexed: 11/05/2022] Open
Abstract
Zika virus (ZIKV) poses a serious threat to global public health due to its close relationship with neurological and male reproductive damage. However, deficiency of human testicular samples hinders the in-depth research on ZIKV-induced male reproductive system injury. Organoids are relatively simple in vitro models, which could mimic the pathological changes of corresponding organs. In this study, we constructed a 3D testicular organoid model using primary testicular cells from adult BALB/c mice. Similar to the testis, this organoid system has a blood-testis barrier (BTB)-like structure and could synthesize testosterone. ZIKV tropism of testicular cells and ZIKV-induced pathological changes in testicular organoid was also similar to that in mammalian testis. Therefore, our results provide a simple and reproducible in vitro testicular model for the investigations of ZIKV-induced testicular injury.
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Affiliation(s)
- Wei Yang
- Department of Microbiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China; Department of Neurosurgery, Capital Medical University Sanbo Brain Hospital, Beijing, 100093, China
| | - Chen Zhang
- Department of Microbiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Yan-Hua Wu
- Department of Microbiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Li-Bo Liu
- Department of Microbiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Zi-Da Zhen
- Department of Microbiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Dong-Ying Fan
- Department of Microbiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Zheng-Ran Song
- Department of Microbiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Jia-Tong Chang
- Department of Microbiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Pei-Gang Wang
- Department of Microbiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China.
| | - Jing An
- Department of Microbiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China; Center of Epilepsy, Beijing Institute for Brain Disorders, Beijing, 100093, China.
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Aden NL, Bleeke M, Kordes UR, Brunne B, Holstermann B, Biemann R, Ceglarek U, Soave A, Salzbrunn A, Schneider SW, von Kopylow K. Germ Cell Maintenance and Sustained Testosterone and Precursor Hormone Production in Human Prepubertal Testis Organ Culture with Tissues from Boys 7 Years+ under Conditions from Adult Testicular Tissue. Cells 2023; 12:cells12030415. [PMID: 36766757 PMCID: PMC9913959 DOI: 10.3390/cells12030415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/20/2023] [Accepted: 01/24/2023] [Indexed: 01/28/2023] Open
Abstract
Human prepubertal testicular tissues are rare, but organ culture conditions to develop a system for human in vitro-spermatogenesis are an essential option for fertility preservation in prepubertal boys subjected to gonadotoxic therapy. To avoid animal testing in line with the 3Rs principle, organ culture conditions initially tested on human adult testis tissue were applied to prepubertal samples (n = 3; patient ages 7, 9, and 12 years). Tissues were investigated by immunostaining and transmission electron microscopy (TEM), and the collected culture medium was profiled for steroid hormones by liquid chromatography-tandem mass spectrometry (LC-MS/MS). Culture conditions proved suitable for prepubertal organ culture since SSCs and germ cell proliferation could be maintained until the end of the 3-week-culture. Leydig cells (LCs) were shown to be competent for steroid hormone production. Three additional testis tissues from boys of the same age were examined for the number of germ cells and undifferentiated spermatogonia (SPG). Using TEM micrographs, eight tissues from patients aged 1.5 to 13 years were examined, with respect to the sizes of mitochondria (MT) in undifferentiated SPG and compared with those from two adult testicular tissues. Mitochondrial sizes were shown to be comparable between adults and prepubertal boys from approximately 7 years of age, which suggests the transition of SSCs from normoxic to hypoxic metabolism at about or before this time period.
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Affiliation(s)
- Neels Lennart Aden
- Clinic and Polyclinic for Dermatology and Venerology, Andrological Section, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Matthias Bleeke
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Uwe R. Kordes
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Bianka Brunne
- Institute of Neuroanatomy, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Barbara Holstermann
- Institute of Neuroanatomy, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Ronald Biemann
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, University of Leipzig, 04103 Leipzig, Germany
| | - Uta Ceglarek
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, University of Leipzig, 04103 Leipzig, Germany
| | - Armin Soave
- Department of Urology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Andrea Salzbrunn
- Clinic and Polyclinic for Dermatology and Venerology, Andrological Section, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Stefan W. Schneider
- Clinic and Polyclinic for Dermatology and Venerology, Andrological Section, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Kathrein von Kopylow
- Clinic and Polyclinic for Dermatology and Venerology, Andrological Section, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
- Correspondence:
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11
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Kawabe Y, Numabe T, Tanemura K, Hara K. Characteristics of alpha smooth muscle actin-positive peritubular cells in prepubertal bovine testes. Biochem Biophys Res Commun 2022; 609:48-53. [DOI: 10.1016/j.bbrc.2022.03.149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 03/28/2022] [Indexed: 11/25/2022]
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12
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Sharma S, Venzac B, Burgers T, Le Gac S, Schlatt S. Microfluidics in male reproduction: is ex vivo culture of primate testis tissue a future strategy for ART or toxicology research? Mol Hum Reprod 2021; 26:179-192. [PMID: 31977028 DOI: 10.1093/molehr/gaaa006] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 01/03/2020] [Indexed: 01/09/2023] Open
Abstract
The significant rise in male infertility disorders over the years has led to extensive research efforts to recapitulate the process of male gametogenesis in vitro and to identify essential mechanisms involved in spermatogenesis, notably for clinical applications. A promising technology to bridge this research gap is organ-on-chip (OoC) technology, which has gradually transformed the research landscape in ART and offers new opportunities to develop advanced in vitro culture systems. With exquisite control on a cell or tissue microenvironment, customized organ-specific structures can be fabricated in in vitro OoC platforms, which can also simulate the effect of in vivo vascularization. Dynamic cultures using microfluidic devices enable us to create stimulatory effect and non-stimulatory culture conditions. Noteworthy is that recent studies demonstrated the potential of continuous perfusion in OoC systems using ex vivo mouse testis tissues. Here we review the existing literature and potential applications of such OoC systems for male reproduction in combination with novel bio-engineering and analytical tools. We first introduce OoC technology and highlight the opportunities offered in reproductive biology in general. In the subsequent section, we discuss the complex structural and functional organization of the testis and the role of the vasculature-associated testicular niche and fluid dynamics in modulating testis function. Next, we review significant technological breakthroughs in achieving in vitro spermatogenesis in various species and discuss the evidence from microfluidics-based testes culture studies in mouse. Lastly, we discuss a roadmap for the potential applications of the proposed testis-on-chip culture system in the field of primate male infertility, ART and reproductive toxicology.
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Affiliation(s)
- Swati Sharma
- Centre for Reproductive Medicine and Andrology, University of Münster, Münster, Germany
| | - Bastien Venzac
- Applied Microfluidics for BioEngineering Research, MESA+ Institute for Nanotechnology and TechMed Centre, University of Twente, Enschede, The Netherlands
| | - Thomas Burgers
- Applied Microfluidics for BioEngineering Research, MESA+ Institute for Nanotechnology and TechMed Centre, University of Twente, Enschede, The Netherlands
| | - Séverine Le Gac
- Applied Microfluidics for BioEngineering Research, MESA+ Institute for Nanotechnology and TechMed Centre, University of Twente, Enschede, The Netherlands
| | - Stefan Schlatt
- Centre for Reproductive Medicine and Andrology, University of Münster, Münster, Germany
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13
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Liu HC, Xie Y, Deng CH, Liu GH. Stem cell-based therapies for fertility preservation in males: Current status and future prospects. World J Stem Cells 2020; 12:1097-1112. [PMID: 33178394 PMCID: PMC7596443 DOI: 10.4252/wjsc.v12.i10.1097] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 05/13/2020] [Accepted: 08/26/2020] [Indexed: 02/06/2023] Open
Abstract
With the decline in male fertility in recent years, strategies for male fertility preservation have received increasing attention. In this study, by reviewing current treatments and recent publications, we describe research progress in and the future directions of stem cell-based therapies for male fertility preservation, focusing on the use of spermatogonial stem cells (SSCs), SSC niches, SSC-based testicular organoids, other stem cell types such as mesenchymal stem cells, and stem cell-derived extracellular vesicles. In conclusion, a more comprehensive understanding of the germ cell microenvironment, stem cell-derived extracellular vesicles, and testicular organoids will play an important role in achieving male fertility preservation.
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Affiliation(s)
- Han-Chao Liu
- Department of Andrology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China
| | - Yun Xie
- Department of Andrology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China
| | - Chun-Hua Deng
- Department of Andrology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China
| | - Gui-Hua Liu
- Reproductive Medicine Research Center, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou 510655, Guangdong Province, China
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14
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Edmonds ME, Woodruff TK. Testicular organoid formation is a property of immature somatic cells, which self-assemble and exhibit long-term hormone-responsive endocrine function. Biofabrication 2020; 12:045002. [PMID: 32492667 DOI: 10.1088/1758-5090/ab9907] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Testicular organoid models are tools to study testicular physiology, development, and spermatogenesis in vitro. However, few side-by-side comparisons of organoid generation method have been evaluated. Here, we directly tested whether the culture microenvironment is the prime determinant promoting testicular organoid self-assembly. Using Matrigel as a representative extracellular matrix (ECM), we compared multiple culture environments, 2D and 3D, ECM-free and ECM, for organoid self-assembly with immature murine testicular cells. De novo tissues were observed to self-assemble in all four culture environments tested within 72 h, however, these tissues only met requirements to be named organoids in 2D ECM and 3D ECM-free (3DF) culture methods. Based on these results, 3DF was selected for further study, and used to examine animal age as an independent variable. Organoid assembly was significantly delayed when using pubertal murine cells and entirely absent from adult murine and adult human cells. Organoid-conditioned medium and medium supplemented with 1% Matrigel did not improve organoid assembly in pubertal murine cells, but immature murine cells rescued the assembly of adult murine cells when cultured together as age-chimeric cell mixtures. In murine organoids cultured for 14 d, tubule-like structures exhibiting a highly biomimetic architecture were characterized, including some rare germ and spermatogonial stem cells. These structural organoids secreted high levels of testosterone and inhibin B over 12 weeks with preserved responsivity to gonadotropins. Collectively these studies, in which cellular self-assembly and organoid formation was achieved independent of the culture microenvironment, suggest that self-assembly is an innate property of immature testicular cells independent from, but capable of being promoted by, the culture environment. This study provides a template for studying testicular organoid self-assembly and endocrine function, and a platform for improving the engineering of functional testicular tissues.
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Affiliation(s)
- Maxwell E Edmonds
- Department of Obstetrics and Gynecology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States of America
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15
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Gargus ES, Rogers HB, McKinnon KE, Edmonds ME, Woodruff TK. Engineered reproductive tissues. Nat Biomed Eng 2020; 4:381-393. [PMID: 32251392 PMCID: PMC7416444 DOI: 10.1038/s41551-020-0525-x] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 02/05/2020] [Indexed: 12/14/2022]
Abstract
Engineered male and female biomimetic reproductive tissues are being developed as autonomous in vitro units or as integrated multi-organ in vitro systems to support germ cell and embryo function, and to display characteristic endocrine phenotypic patterns, such as the 28-day human ovulatory cycle. In this Review, we summarize how engineered reproductive tissues facilitate research in reproductive biology, and overview strategies for making engineered reproductive tissues that might eventually allow the restoration of reproductive capacity in patients.
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Affiliation(s)
- Emma S Gargus
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Hunter B Rogers
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Kelly E McKinnon
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Maxwell E Edmonds
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Teresa K Woodruff
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
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16
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Richer G, Baert Y, Goossens E. In-vitro spermatogenesis through testis modelling: Toward the generation of testicular organoids. Andrology 2020; 8:879-891. [PMID: 31823507 PMCID: PMC7496450 DOI: 10.1111/andr.12741] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 10/17/2019] [Accepted: 12/04/2019] [Indexed: 01/09/2023]
Abstract
Background The testicular organoid concept has recently been introduced in tissue engineering to refer to testicular cell organizations modeling testicular architecture and function. The testicular organoid approach gives control over which and how cells reaggregate, which is not possible in organotypic cultures, thereby extending the applicability of in‐vitro spermatogenesis (IVS) systems. However, it remains unclear which culture method and medium allow reassociation of testicular cells into a functional testicular surrogate in‐vitro. Objective The aim of this paper is to review the different strategies that have been used in an attempt to create testicular organoids and generate spermatozoa. We want to provide an up‐to‐date list on culture methodologies and media compositions that have been used and determine their role in regulating tubulogenesis and differentiation of testicular cells. Search method A literature search was conducted in PubMed, Web of Science, and Scopus to select studies reporting the reorganization of testicular cell suspensions in‐vitro, using the keywords: three‐dimensional culture, in‐vitro spermatogenesis, testicular organoid, testicular scaffold, and tubulogenesis. Papers published before the August 1, 2019, were selected. Outcome Only a limited number of studies have concentrated on recreating the testicular architecture in‐vitro. While some advances have been made in the testicular organoid research in terms of cellular reorganization, none of the described culture systems is adequate for the reproduction of both the testicular architecture and IVS. Conclusion Further improvements in culture methodology and medium composition have to be made before being able to provide both testicular tubulogenesis and spermatogenesis in‐vitro.
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Affiliation(s)
- Guillaume Richer
- Biology of the Testis research Lab, Department of Reproduction, Genetics and Regenerative Medicine, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Yoni Baert
- Biology of the Testis research Lab, Department of Reproduction, Genetics and Regenerative Medicine, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Ellen Goossens
- Biology of the Testis research Lab, Department of Reproduction, Genetics and Regenerative Medicine, Vrije Universiteit Brussel (VUB), Brussels, Belgium
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17
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Oliver E, Stukenborg JB. Rebuilding the human testis in vitro. Andrology 2019; 8:825-834. [PMID: 31539453 PMCID: PMC7496374 DOI: 10.1111/andr.12710] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 08/21/2019] [Accepted: 09/16/2019] [Indexed: 12/22/2022]
Abstract
Increasing rates of male infertility have led to a greater need for relevant model systems to gain further insight into male fertility and its failings. Spermatogenesis and hormone production occur within distinct regions of the testis. Defined by specialized architecture and a diverse population of cell types, it is no surprise that disruption of this highly organized microenvironment can lead to infertility. To date, no robust in vitro system has facilitated full spermatogenesis resulting in the production of fertilization‐competent human spermatozoa. Here, we review a selection of current in vitro systems available for modelling the human testis microenvironment with focus on the progression of spermatogenesis and recapitulation of the testis microenvironment.
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Affiliation(s)
- E Oliver
- NORDFERTIL Research Lab Stockholm, Childhood Cancer Research Unit, Department of Women's and Children's Health, Karolinska Institutet, Karolinska University Hospital, Solna, Sweden
| | - J-B Stukenborg
- NORDFERTIL Research Lab Stockholm, Childhood Cancer Research Unit, Department of Women's and Children's Health, Karolinska Institutet, Karolinska University Hospital, Solna, Sweden
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18
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Dong L, Kristensen SG, Hildorf S, Gul M, Clasen-Linde E, Fedder J, Hoffmann ER, Cortes D, Thorup J, Andersen CY. Propagation of Spermatogonial Stem Cell-Like Cells From Infant Boys. Front Physiol 2019; 10:1155. [PMID: 31607938 PMCID: PMC6761273 DOI: 10.3389/fphys.2019.01155] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 08/28/2019] [Indexed: 12/22/2022] Open
Abstract
Background Gonadotoxic treatment of malignant diseases as well as some non-malignant conditions such as cryptorchidism in young boys may result in infertility and failure to father children later in life. As a fertility preserving strategy, several centers collect testicular biopsies to cryopreserve spermatogonial stem cells (SSCs) world-wide. One of the most promising therapeutic strategies is to transplant SSCs back into the seminiferous tubules to initiate endogenous spermatogenesis. However, to obtain sufficient numbers of SSC to warrant transplantation, in vitro propagation of cells is needed together with proper validation of their stem cell identity. Materials and Methods A minute amount of testicular biopsies (between 5 mg and 10 mg) were processed by mechanical and enzymatic digestion. SSCs were enriched by differential plating method in StemPro-34 medium supplemented with several growth factors. SSC-like cell clusters (SSCLCs) were passaged five times. SSCLCs were identified by immunohistochemical and immunofluorescence staining, using protein expression patterns in testis biopsies as reference. Quantitative polymerase chain reaction analysis of SSC markers LIN-28 homolog A (LIN28A), G antigen 1 (GAGE1), promyelocytic leukemia zinc finger protein (PLZF), integrin alpha 6 (ITGA6), ubiquitin carboxy-terminal hydrolase L1 (UCHL1) and integrin beta 1 (ITGB1) were also used to validate the SSC-like cell identity. Results Proliferation of SSCLCs was achieved. The presence of SSCs in SSCLCs was confirmed by positive immunostaining of LIN28, UCHL1 and quantitative polymerase chain reaction for LIN28A, UCHL1, PLZF, ITGA6, and ITGB1, respectively. Conclusion This study has demonstrated that SSCs from infant boys possess the capacity for in vitro proliferation and advance a fertility preservation strategy for pre-pubertal boys who may otherwise lose their fertility.
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Affiliation(s)
- Lihua Dong
- Laboratory of Reproductive Biology, Copenhagen University Hospital, Copenhagen, Denmark
| | - Stine Gry Kristensen
- Laboratory of Reproductive Biology, Copenhagen University Hospital, Copenhagen, Denmark
| | - Simone Hildorf
- Department of Pediatric Surgery, Copenhagen University Hospital, Copenhagen, Denmark
| | - Murat Gul
- Laboratory of Reproductive Biology, Copenhagen University Hospital, Copenhagen, Denmark.,Department of Urology, Aksaray University School of Medicine, Aksaray, Turkey
| | - Erik Clasen-Linde
- Department of Pathology, Copenhagen University Hospital, Copenhagen, Denmark
| | - Jens Fedder
- Centre of Andrology and Fertility Clinic, Department D, Odense University Hospital, Odense C, Denmark.,Research Unit of Human Reproduction, Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Eva R Hoffmann
- Center for Chromosome Stability, Department of Molecular and Cellular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Dina Cortes
- Department of Pediatrics, Copenhagen University Hospital Hvidovre, Copenhagen, Denmark.,Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jorgen Thorup
- Department of Pediatric Surgery, Copenhagen University Hospital, Copenhagen, Denmark.,Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Claus Yding Andersen
- Laboratory of Reproductive Biology, Copenhagen University Hospital, Copenhagen, Denmark.,Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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19
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Sharma S, Wistuba J, Pock T, Schlatt S, Neuhaus N. Spermatogonial stem cells: updates from specification to clinical relevance. Hum Reprod Update 2019; 25:275-297. [DOI: 10.1093/humupd/dmz006] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 11/23/2018] [Accepted: 02/22/2019] [Indexed: 12/20/2022] Open
Affiliation(s)
- Swati Sharma
- Centre of Reproductive Medicine and Andrology, Institute of Reproductive and Regenerative Biology, Albert-Schweitzer Campus 1, Building D11, Münster, Germany
| | - Joachim Wistuba
- Centre of Reproductive Medicine and Andrology, Institute of Reproductive and Regenerative Biology, Albert-Schweitzer Campus 1, Building D11, Münster, Germany
| | - Tim Pock
- Centre of Reproductive Medicine and Andrology, Institute of Reproductive and Regenerative Biology, Albert-Schweitzer Campus 1, Building D11, Münster, Germany
| | - Stefan Schlatt
- Centre of Reproductive Medicine and Andrology, Institute of Reproductive and Regenerative Biology, Albert-Schweitzer Campus 1, Building D11, Münster, Germany
| | - Nina Neuhaus
- Centre of Reproductive Medicine and Andrology, Institute of Reproductive and Regenerative Biology, Albert-Schweitzer Campus 1, Building D11, Münster, Germany
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