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
References
Abrishami, M., M. Anzar, Y. Yang, and A. Honaramooz. Cryopreservation of immature porcine testis tissue to maintain its developmental potential after xenografting into recipient mice. Theriogenology 73:86–96, 2010.
Aktas, B. K., S. Bulut, S. Bulut, M. M. Baykam, C. Ozden, M. Senes, D. Yucel, and A. Memis. The effects of N-acetylcysteine on testicular damage in experimental testicular ischemia/reperfusion injury. Pediatr. Surg. Int. 26:293–298, 2010.
Amorim, C. A., and A. Shikanov. The artificial ovary: current status and future perspectives. Future Oncol. 12:2323–2332, 2016.
Artel, A., H. Mehdizadeh, Y. C. Chiu, E. M. Brey, and A. Cinar. An agent-based model for the investigation of neovascularization within porous scaffolds. Tissue Eng. Part A 17:2133–2141, 2011.
Awada, H. K., N. R. Johnson, and Y. Wang. Sequential delivery of angiogenic growth factors improves revascularization and heart function after myocardial infarction. J. Control Release 207:7–17, 2015.
Ayinde, O. C., S. Ogunnowo, and R. A. Ogedegbe. Influence of Vitamin C and Vitamin E on testicular zinc content and testicular toxicity in lead exposed albino rats. BMC Pharmacol. Toxicol. 13:17, 2012.
Baert, Y., E. Goossens, D. van Saen, L. Ning, P. In’t Veld, and H. Tournaye. Orthotopic grafting of cryopreserved prepubertal testicular tissue: in search of a simple yet effective cryopreservation protocol. Fertil. Steril. 97:1152–1157, 2012.
Baert, Y., J. B. Stukenborg, M. Landreh, J. De Kock, H. Jornvall, O. Soder, and E. Goossens. Derivation and characterization of a cytocompatible scaffold from human testis. Hum. Reprod. 30:256–267, 2015.
Bahadur, G., R. Chatterjee, and D. Ralph. Testicular tissue cryopreservation in boys. Ethical and legal issues: case report. Hum. Reprod. 15:1416–1420, 2000.
Bahadur, G., and D. Ralph. Gonadal tissue cryopreservation in boys with paediatric cancers. Hum. Reprod. 14:11–17, 1999.
Bonandrini, B., M. Figliuzzi, E. Papadimou, M. Morigi, N. Perico, F. Casiraghi, C. Dipl, F. Sangalli, S. Conti, A. Benigni, A. Remuzzi, and G. Remuzzi. Recellularization of well-preserved acellular kidney scaffold using embryonic stem cells. Tissue Eng. Part A 20:1486–1498, 2014.
Caires, K. C., J. de Avila, and D. J. McLean. Vascular endothelial growth factor regulates germ cell survival during establishment of spermatogenesis in the bovine testis. Reproduction 138:667–677, 2009.
Campbell, G. R., G. Turnbull, L. Xiang, M. Haines, S. Armstrong, B. E. Rolfe, and J. H. Campbell. The peritoneal cavity as a bioreactor for tissue engineering visceral organs: bladder, uterus and vas deferens. J. Tissue Eng. Regen. Med. 2:50–60, 2008.
Cao, Y., A. Hong, H. Schulten, and M. J. Post. Update on therapeutic neovascularization. Cardiovasc. Res. 65:639–648, 2005.
Cay, A., A. Alver, M. Kucuk, O. Isik, M. S. Eminagaoglu, S. C. Karahan, and O. Deger. The effects of N-acetylcysteine on antioxidant enzyme activities in experimental testicular torsion. J. Surg. Res. 131:199–203, 2006.
Chen, K. L., D. Eberli, J. J. Yoo, and A. Atala. Bioengineered corporal tissue for structural and functional restoration of the penis. Proc. Natl Acad. Sci. U.S.A. 107:3346–3350, 2010.
Chen, R. R., E. A. Silva, W. W. Yuen, and D. J. Mooney. Spatio-temporal VEGF and PDGF delivery patterns blood vessel formation and maturation. Pharm. Res. 24:258–264, 2007.
Cheng, C. Y., E. W. Wong, H. H. Yan, and D. D. Mruk. Regulation of spermatogenesis in the microenvironment of the seminiferous epithelium: new insights and advances. Mol. Cell. Endocrinol. 315:49–56, 2010.
Crapo, P. M., T. W. Gilbert, and S. F. Badylak. An overview of tissue and whole organ decellularization processes. Biomaterials 32:3233–3243, 2011.
Curaba, M., J. Poels, A. van Langendonckt, J. Donnez, and C. Wyns. Can prepubertal human testicular tissue be cryopreserved by vitrification? Fertil. Steril. 95:2123.e9–2123.e12, 2011.
de Michele, F., J. Poels, L. Weerens, C. Petit, Z. Evrard, J. Ambroise, D. Gruson, and C. Wyns. Preserved seminiferous tubule integrity with spermatogonial survival and induction of Sertoli and Leydig cell maturation after long-term organotypic culture of prepubertal human testicular tissue. Hum. Reprod. 97:143–150, 2016.
des Rieux, A., P. De Berdt, E. Ansorena, B. Ucakar, J. Damien, O. Schakman, E. Audouard, C. Bouzin, D. Auhl, T. Simon-Yarza, O. Feron, M. J. Blanco-Prieto, P. Carmeliet, C. Bailly, F. Clotman, and V. Preat. Vascular endothelial growth factor-loaded injectable hydrogel enhances plasticity in the injured spinal cord. J Biomed Mater Res A 102:2345–2355, 2013.
des Rieux, A., B. Ucakar, B. P. Mupendwa, D. Colau, O. Feron, P. Carmeliet, and V. Preat. 3D systems delivering VEGF to promote angiogenesis for tissue engineering. J Control Release 150:272–278, 2011.
Dhandayuthapani, B., Y. Yoshida, T. Maekawa, and D. S. Kumar. Polymeric scaffolds in tissue engineering application: a review. Int. J. Polym. Sci. 1–19:2011, 2011.
Eberli, D., R. Susaeta, J. J. Yoo, and A. Atala. A method to improve cellular content for corporal tissue engineering. Tissue Eng. Part A 14:1581–1589, 2008.
Enders, G. C., J. H. Henson, and C. F. Millette. Sertoli cell binding to isolated testicular basement membrane. J. Cell Biol. 103:1109–1119, 1986.
Gatta, G., G. Zigon, R. Capocaccia, J. W. Coebergh, E. Desandes, P. Kaatsch, G. Pastore, R. Peris-Bonet, C. A. Stiller, and EUROCARE Working Group. Survival of European children and young adults with cancer diagnosed 1995–2002. Eur. J. Cancer 45: 992–1005, 2009.
Gerdprasert, O., M. K. O’Bryan, J. A. Muir, A. M. Caldwell, S. Schlatt, D. M. de Kretser, and M. P. Hedger. The response of testicular leukocytes to lipopolysaccharide-induced inflammation: further evidence for heterogeneity of the testicular macrophage population. Cell Tissue Res. 308:277–285, 2002.
Ginsberg, J. P., C. A. Carlson, K. Lin, W. L. Hobbie, E. Wigo, X. Wu, R. L. Brinster, and T. F. Kolon. An experimental protocol for fertility preservation in prepubertal boys recently diagnosed with cancer: a report of acceptability and safety. Hum. Reprod. 25:37–41, 2010.
Hadley, M. A., S. W. Byers, C. A. Suarez-Quian, H. K. Kleinman, and M. Dym. Extracellular matrix regulates Sertoli cell differentiation, testicular cord formation, and germ cell development in vitro. J. Cell Biol. 101:1511–1522, 1985.
Han, F., X. Jia, D. Dai, X. Yang, J. Zhao, Y. Zhao, Y. Fan, and X. Yuan. Performance of a multilayered small-diameter vascular scaffold dual-loaded with VEGF and PDGF. Biomaterials 34:7302–7313, 2013.
Hao, X., E. A. Silva, A. Mansson-Broberg, K. H. Grinnemo, A. J. Siddiqui, G. Dellgren, E. Wardell, L. A. Brodin, D. J. Mooney, and C. Sylven. Angiogenic effects of sequential release of VEGF-A165 and PDGF-BB with alginate hydrogels after myocardial infarction. Cardiovasc. Res. 75:178–185, 2007.
Hemadi, M., S. Shokri, F. Moramezi, R. Nikbakht, and A. Sobhani. Potential use of melatonin supplementation to protect vitrified testicular grafts from hypoxic-ischaemic damage. Andrologia 46:513–521, 2014.
Hemadi, M., M. Zargar, A. Sobhani, and A. Sobhani. Assessment of morphological and functional changes in neonate vitrified testis grafts after host treatment with melatonin. Folia Morphol. (Warsz) 70:95–102, 2011.
Henry, L., S. Labied, M. Fransolet, N. Kirschvink, S. Blacher, A. Noel, J. M. Foidart, M. Nisolle, and C. Munaut. Isoform 165 of vascular endothelial growth factor in collagen matrix improves ovine cryopreserved ovarian tissue revascularisation after xenotransplantation in mice. Reprod. Biol. Endocrinol. 13:12, 2015.
Hoare, T. R., and D. S. Kohane. Hydrogels in drug delivery: progress and challenges. Polymer 49:1993–2007, 2008.
Honaramooz, A., A. Snedaker, M. Boiani, H. Scholer, I. Dobrinski, and S. Schlatt. Sperm from neonatal mammalian testes grafted in mice. Nature 418:778–781, 2002.
House, M., C. C. Sanchez, W. L. Rice, S. Socrate, and D. L. Kaplan. Cervical tissue engineering using silk scaffolds and human cervical cells. Tissue Eng. Part A 16:2101–2112, 2010.
Howlader, N., A. M. Noone, M. Krapcho, J. Garshell, N. Neyman, S. F. Altekruse, C. L. Kosary, M. Yu, J. Ruhl, Z. Tatalovich, H. Cho, A. Mariotto, D. R. Lewis, H. S. Chen, E. J. Feuer, and K. A. Cronin. SEER Cancer Statistics Review, 1975–2010. Bethesda, MD: National Cancer Institute, 2014.
Huang, M., S. N. Vitharana, L. J. Peek, T. Coop, and C. Berkland. Polyelectrolyte complexes stabilize and controllably release vascular endothelial growth factor. Biomacromolecules 8:1607–1614, 2007.
Hussein, K. H., K. M. Park, K. S. Kang, and H. M. Woo. Biocompatibility evaluation of tissue-engineered decellularized scaffolds for biomedical application. Mater. Sci. Eng. C Mater. Biol. Appl. 67:766–778, 2016.
Hynes, R. O. The extracellular matrix: not just pretty fibrils. Science 326:1216–1219, 2009.
Jafari, M., Z. Paknejad, M. R. Rad, S. R. Motamedian, M. J. Eghbal, N. Nadjmi, and A. Khojasteh. Polymeric scaffolds in tissue engineering: a literature review. J Biomed Mater Res B Appl Biomater 104(11):2843–2853, 2015.
Kaneko, H., K. Kikuchi, M. Nakai, T. Somfai, J. Noguchi, F. Tanihara, J. Ito, and N. Kashiwazaki. Generation of live piglets for the first time using sperm retrieved from immature testicular tissue cryopreserved and grafted into nude mice. PLoS ONE 8:e70989, 2013.
Keros, V., K. Hultenby, B. Borgstrom, M. Fridstrom, K. Jahnukainen, and O. Hovatta. Methods of cryopreservation of testicular tissue with viable spermatogonia in pre-pubertal boys undergoing gonadotoxic cancer treatment. Hum. Reprod. 22:1384–1395, 2007.
Kim, T. H., H. K. Hargreaves, R. K. Brynes, H. K. Hawkins, V. K. Lui, J. Woodard, and A. H. Ragab. Pretreatment testicular biopsy in childhood acute lymphocytic leukaemia. Lancet 2:657–658, 1981.
Kim, T. H., H. K. Hargreaves, W. C. Chan, R. K. Brynes, C. Alvarado, J. Woodard, and A. H. Ragab. Sequential testicular biopsies in childhood acute lymphocytic leukemia. Cancer 57:1038–1041, 1986.
Labied, S., Y. Delforge, C. Munaut, S. Blacher, A. Colige, R. Delcombel, L. Henry, M. Fransolet, C. Jouan, S. Perrier d’Hauterive, A. Noel, M. Nisolle, and J. M. Foidart. Isoform 111 of vascular endothelial growth factor (VEGF111) improves angiogenesis of ovarian tissue xenotransplantation. Transplantation 95:426–433, 2013.
Laronda, M. M., A. E. Jakus, K. A. Whelan, J. A. Wertheim, R. N. Shah, and T. K. Woodruff. Initiation of puberty in mice following decellularized ovary transplant. Biomaterials 50:20–29, 2015.
Lee, D. R., M. T. Kaproth, and J. E. Parks. In vitro production of haploid germ cells from fresh or frozen-thawed testicular cells of neonatal bulls. Biol. Reprod. 65:873–878, 2001.
Lee, J., and K. Y. Lee. Local and sustained vascular endothelial growth factor delivery for angiogenesis using an injectable system. Pharm. Res. 26:1739–1744, 2009.
Lee, J. H., M. C. Gye, K. W. Choi, J. Y. Hong, Y. B. Lee, D. W. Park, S. J. Lee, and C. K. Min. In vitro differentiation of germ cells from nonobstructive azoospermic patients using three-dimensional culture in a collagen gel matrix. Fertil. Steril. 87:824–833, 2007.
Lee, J. H., H. J. Kim, H. Kim, S. J. Lee, and M. C. Gye. In vitro spermatogenesis by three-dimensional culture of rat testicular cells in collagen gel matrix. Biomaterials 27:2845–2853, 2006.
Lee, J. H., J. H. Oh, J. H. Lee, M. R. Kim, and C. K. Min. Evaluation of in vitro spermatogenesis using poly(d,l-lactic-co-glycolic acid) (PLGA)-based macroporous biodegradable scaffolds. J. Tissue Eng. Regen. Med. 5:130–137, 2011.
Liu, J., K. M. Cheng, and F. G. Silversides. Production of live offspring from testicular tissue cryopreserved by vitrification procedures in Japanese quail (Coturnix japonica). Biol. Reprod. 88:124, 2013.
Liu, Z., Y. H. Nie, C. C. Zhang, Y. J. Cai, Y. Wang, H. P. Lu, Y. Z. Li, C. Cheng, Z. L. Qiu, and Q. Sun. Generation of macaques with sperm derived from juvenile monkey testicular xenografts. Cell Res. 26:139–142, 2016.
Luyckx, V., M. M. Dolmans, J. Vanacker, C. Legat, C. Fortuno Moya, J. Donnez, and C. A. Amorim. A new step toward the artificial ovary: survival and proliferation of isolated murine follicles after autologous transplantation in a fibrin scaffold. Fertil. Steril. 101:1149–1156, 2014.
Luyckx, V., M. M. Dolmans, J. Vanacker, S. R. Scalercio, J. Donnez, and C. A. Amorim. First step in developing a 3D biodegradable fibrin scaffold for an artificial ovary. J. Ovarian Res. 6:83, 2013.
Milazzo, J. P., A. Travers, A. Bironneau, A. Safsaf, E. Gruel, C. Arnoult, B. Mace, O. Boyer, and N. Rives. Rapid screening of cryopreservation protocols for murine prepubertal testicular tissue by histology and PCNA immunostaining. J. Androl. 31:617–630, 2010.
Murphy, S. V., and A. Atala. 3D bioprinting of tissues and organs. Nat. Biotechnol. 32:773–785, 2014.
Nicodemus, G. D., and S. J. Bryant. Cell encapsulation in biodegradable hydrogels for tissue engineering applications. Tissue Eng. Part B Rev. 14:149–165, 2008.
Nomi, M., A. Atala, P. D. Coppi, and S. Soker. Principals of neovascularization for tissue engineering. Mol. Aspects Med. 23:463–483, 2002.
Ohta, H., and T. Wakayama. Generation of normal progeny by intracytoplasmic sperm injection following grafting of testicular tissue from cloned mice that died postnatally. Biol. Reprod. 73:390–395, 2005.
Patel, H., M. Bonde, and G. Srinivasan. Biodegradable polymer scaffold for tissue engineering. Trends Biomater. Artif. Organs 25:20–29, 2011.
Pati, F., J. Jang, D. H. Ha, S. Won Kim, J. W. Rhie, J. H. Shim, D. H. Kim, and D. W. Cho. Printing three-dimensional tissue analogues with decellularized extracellular matrix bioink. Nat Commun 5:3935, 2014.
Pelliniemi, L. J., J. Paranko, S. K. Grund, K. Frojdman, J. M. Foidart, and T. Lakkala-Paranko. Extracellular matrix in testicular differentiation. Ann. N. Y. Acad. Sci. 438:405–416, 1984.
Poels, J., G. Abou-Ghannam, S. Herman, A. Van Langendonckt, F. X. Wese, and C. Wyns. In search of better spermatogonial preservation by supplementation of cryopreserved human immature testicular tissue xenografts with N-acetylcysteine and testosterone. Front. Surg. 1:47, 2014.
Poels, J., A. Van Langendonckt, M. C. Many, F. X. Wese, and C. Wyns. Vitrification preserves proliferation capacity in human spermatogonia. Hum. Reprod. 28:578–589, 2013.
Pollanen, P. P., M. Kallajoki, L. Risteli, J. Risteli, and J. J. Suominen. Laminin and type IV collagen in the human testis. Int. J. Androl. 8:337–347, 1985.
Rao, A. V., and C. Shaha. N-acetylcysteine prevents MAA induced male germ cell apoptosis: role of glutathione and cytochrome c. FEBS Lett. 527:133–137, 2002.
Rathi, R., W. Zeng, S. Megee, A. Conley, S. Meyers, and I. Dobrinski. Maturation of testicular tissue from infant monkeys after xenografting into mice. Endocrinology 149:5288–5296, 2008.
Raya-Rivera, A. M., D. Esquiliano, R. Fierro-Pastrana, E. Lopez-Bayghen, P. Valencia, R. Ordorica-Flores, S. Soker, J. J. Yoo, and A. Atala. Tissue-engineered autologous vaginal organs in patients: a pilot cohort study. Lancet 384:329–336, 2014.
Reuter, K., J. Ehmcke, J. B. Stukenborg, M. Simoni, O. S. Damm, K. Redmann, S. Schlatt, and J. Wistuba. Reassembly of somatic cells and testicular organogenesis in vitro. Tissue Cell 46:86–96, 2014.
Richardson, T. P., M. C. Peters, A. B. Ennett, and D. J. Mooney. Polymeric system for dual growth factor delivery. Nat. Biotechnol. 19:1029–1034, 2001.
Rutz, A., M. M. Laronda, S. Xiao, K. A. Whelan, T. K. Woodruff, and R. N. Shah. Engineering a functional ovary with 3D biomaterial printing. Front. Bioeng. Biotechnol. 2016. doi:10.3389/conf.FBIOE.2016.01.02633.
Sadri-Ardekani, H., C. H. Homburg, T. M. van Capel, H. van den Berg, F. van der Veen, C. E. van der Schoot, A. M. van Pelt, and S. Repping. Eliminating acute lymphoblastic leukemia cells from human testicular cell cultures: a pilot study. Fertil Steril 101:1072–1078.e1, 2014.
Sasaki, T., R. Fassler, and E. Hohenester. Laminin: the crux of basement membrane assembly. J. Cell Biol. 164:959–963, 2004.
Schlatt, S., B. Westernstroer, K. Gassei, and J. Ehmcke. Donor-host involvement in immature rat testis xenografting into nude mouse hosts. Biol. Reprod. 82:888–895, 2010.
Schmidt, J. A., J. M. de Avila, and D. J. McLean. Effect of vascular endothelial growth factor and testis tissue culture on spermatogenesis in bovine ectopic testis tissue xenografts. Biol. Reprod. 75:167–175, 2006.
Schover, L. R., K. Brey, A. Lichtin, L. I. Lipshultz, and S. Jeha. Knowledge and experience regarding cancer, infertility, and sperm banking in younger male survivors. J. Clin. Oncol. 20:1880–1889, 2002.
Shetty, G., and M. L. Meistrich. The missing niche for spermatogonial stem cells: do blood vessels point the way? Cell Stem Cell 1:361–363, 2007.
Shikanov, A., Z. Zhang, M. Xu, R. M. Smith, A. Rajan, T. K. Woodruff, and L. D. Shea. Fibrin encapsulation and vascular endothelial growth factor delivery promotes ovarian graft survival in mice. Tissue Eng. Part A 17:3095–3104, 2011.
Shinohara, T., K. Inoue, N. Ogonuki, M. Kanatsu-Shinohara, H. Miki, K. Nakata, M. Kurome, H. Nagashima, S. Toyokuni, K. Kogishi, T. Honjo, and A. Ogura. Birth of offspring following transplantation of cryopreserved immature testicular pieces and in vitro microinsemination. Hum. Reprod. 17:3039–3045, 2002.
Silva, E. A., and D. J. Mooney. Effects of VEGF temporal and spatial presentation on angiogenesis. Biomaterials 31:1235–1241, 2010.
Simon-Yarza, T., F. R. Formiga, E. Tamayo, B. Pelacho, F. Prosper, and M. J. Blanco-Prieto. Vascular endothelial growth factor-delivery systems for cardiac repair: an overview. Theranostics 2:541–552, 2012.
Taylor, K. R., and R. L. Gallo. Glycosaminoglycans and their proteoglycans: host-associated molecular patterns for initiation and modulation of inflammation. FASEB J. 20:9–22, 2006.
Turkmen, S., A. Mentese, E. Karaguzel, Y. Karaca, A. Kucuk, A. Uzun, E. Yulug, and S. Turedi. A comparison of the effects of N-acetylcysteine and ethyl pyruvate on experimental testicular ischemia-reperfusion injury. Fertil. Steril. 98:626–631, 2012.
Van Eyck, A. S., C. Bouzin, O. Feron, L. Romeu, A. Van Langendonckt, J. Donnez, and M. M. Dolmans. Both host and graft vessels contribute to revascularization of xenografted human ovarian tissue in a murine model. Fertil. Steril. 93:1676–1685, 2010.
Van Saen, D., E. Goossens, C. Bourgain, A. Ferster, and H. Tournaye. Meiotic activity in orthotopic xenografts derived from human postpubertal testicular tissue. Hum. Reprod. 26:282–293, 2011.
Van Saen, D., E. Goossens, P. Haentjens, Y. Baert, and H. Tournaye. Exogenous administration of recombinant human FSH does not improve germ cell survival in human prepubertal xenografts. Reprod. Biomed. Online 26:286–298, 2013.
Vanacker, J., M. M. Dolmans, V. Luyckx, J. Donnez, and C. A. Amorim. First transplantation of isolated murine follicles in alginate. Regen. Med. 9:609–619, 2014.
Vanacker, J., V. Luyckx, M. M. Dolmans, A. Des Rieux, J. Jaeger, A. Van Langendonckt, J. Donnez, and C. A. Amorim. Transplantation of an alginate-matrigel matrix containing isolated ovarian cells: first step in developing a biodegradable scaffold to transplant isolated preantral follicles and ovarian cells. Biomaterials 33:6079–6085, 2012.
Wang, P., X. Jiang, Y. Jiang, X. Hu, H. Mou, M. Li, and H. Guan. In vitro antioxidative activities of three marine oligosaccharides. Nat. Prod. Res. 21:646–654, 2007.
Wyns, C., M. Curaba, B. Martinez-Madrid, A. Van Langendonckt, W. Francois-Xavier, and J. Donnez. Spermatogonial survival after cryopreservation and short-term orthotopic immature human cryptorchid testicular tissue grafting to immunodeficient mice. Hum. Reprod. 22:1603–1611, 2007.
Wyns, C., M. Curaba, S. Petit, B. Vanabelle, P. Laurent, J. F. Wese, and J. Donnez. Management of fertility preservation in prepubertal patients: 5 years’ experience at the Catholic University of Louvain. Hum. Reprod. 26:737–747, 2011.
Wyns, C., M. Curaba, B. Vanabelle, A. Van Langendonckt, and J. Donnez. Options for fertility preservation in prepubertal boys. Hum. Reprod. Update 16:312–328, 2010.
Wyns, C., A. Van Langendonckt, F. X. Wese, J. Donnez, and M. Curaba. Long-term spermatogonial survival in cryopreserved and xenografted immature human testicular tissue. Hum. Reprod. 23:2402–2414, 2008.
Yildiz, C., B. Mullen, K. Jarvi, C. McKerlie, and K. C. Lo. Effect of different cryoprotectant agents on spermatogenesis efficiency in cryopreserved and grafted neonatal mouse testicular tissue. Cryobiology 67:70–75, 2013.
Zhang, Y. S., K. Yue, J. Aleman, K. Mollazadeh-Moghaddam, S. M. Bakht, J. Yang, W. Jia, V. Dell’Erba, P. Assawes, S. R. Shin, M. R. Dokmeci, R. Oklu, and A. Khademhosseini. 3D bioprinting for tissue and organ fabrication. Ann. Biomed. Eng. 43(3):730–746, 2016.
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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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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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DOI: https://doi.org/10.1007/s10439-017-1789-5