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Restoring Fertility with Cryopreserved Prepubertal Testicular Tissue: Perspectives with Hydrogel Encapsulation, Nanotechnology, and Bioengineered Scaffolds

  • Reproductive Tissue Engineering
  • Published:
Annals of Biomedical Engineering Aims and scope Submit manuscript

An Erratum to this article was published on 06 February 2017

Abstract

New and improved oncological therapies are now able to cure more than 80% of cancer-affected children in Europe. However, such treatments are gonadotoxic and result in fertility issues, especially in boys who are not able to provide a sperm sample before starting chemo/radiotherapy because of their prepubertal state. For these boys, cryopreservation of immature testicular tissue (ITT) is the only available option, aiming to preserve spermatogonial stem cells (SSCs). Both slow-freezing and vitrification have been investigated to this end and are now applied in a clinical setting for SSC cryopreservation. Research now has to focus on methods that will allow fertility restoration. This review discusses different studies that have been conducted on ITT transplantation, including those using growth factor supplementation like free molecules, or tissue encapsulation with or without nanoparticles, as well as the possibility of developing a bioartificial testis that can be used for in vitro gamete production or in vivo transplantation.

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Abbreviations

ITT:

Immature testicular tissue

SSC:

Spermatogonial stem cell

SC:

Sertoli cell

LC:

Leydig cell

ST:

Seminiferous tubule

ICSI:

Intracytoplasmic sperm injection

VEGF:

Vascular endothelial growth factor

ROS:

Reactive oxygen species

NAC:

N-Acetylcystein

NP:

Nanoparticle

ECM:

Extracellular matrix

PDGF:

Platelet-derived growth factor

EDTA:

Ethylenediaminetetraacetic acid

Gal-KO:

α1,3-Galactosyltransferase knockout

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Acknowledgments

The authors thank Mira Hryniuk, B.A., for reviewing the English language of the manuscript.

Funding

Studies conducted at the UCL were supported by grants from the Fonds National de la Recherche Scientifique de Belgique (Télévie Grants 7.4619.05; 7. 4.572.09.F; 7.4616.11.F; 7.4596.13; 7.4512.15) and the Fondation Salus Sanguinis. Anne des Rieux is a research associate from the FRS-FNRS (Fonds de la Recherche Scientifique, Belgique) and is a recipient of subsidies from the Fonds Spéciaux de Recherche Scientifique (FSR, UCL).

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Correspondence to Christine Wyns.

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Associate Editor Christiani Amorim oversaw the review of this article.

An erratum to this article is available at http://dx.doi.org/10.1007/s10439-017-1807-7.

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Vermeulen, M., Poels, J., de Michele, F. et al. Restoring Fertility with Cryopreserved Prepubertal Testicular Tissue: Perspectives with Hydrogel Encapsulation, Nanotechnology, and Bioengineered Scaffolds. Ann Biomed Eng 45, 1770–1781 (2017). https://doi.org/10.1007/s10439-017-1789-5

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