Animal Reproduction (AR)
Animal Reproduction (AR)

Biobanking and use of gonadal tissues - a promising strategy for conserving wildlife from the Caatinga biome

Alexandre Rodrigues Silva; Alexsandra Fernandes Pereira; Pierre Comizzoli

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Biological Resource Banks (BRB) or Genetic Resource Banks (GRB) are critical tools for the conservation of animal biodiversity. According to the International Union for Conservation of Nature, more than 38,500 species are threatened with extinction, out of a total of 138,300 surveyed species. These banks are repositories of biological samples and data recovered and preserved for the long term by zoos, universities, research centers and other conservation organizations. In recent years, BRB have increasingly included ovarian and testicular tissues as additional options to rescue and propagate wild species, especially those at risk of extinction. After in vitro culture or grafting, gonadal tissues are potential sources of matured gametes that can be used for Assisted Reproduction Technologies while informing about gametogenesis or mechanisms involved in infertility. It therefore is crucial to properly recover, cryopreserve, and culture these tissues using species-specific protocols. Developing BRBs is currently one of the strategies to preserve species from the Caatinga biome - an exclusively Brazilian biome with a rich wild fauna that suffers from anthropogenic activities. Among wild species from this biome, studies have been primarily conducted in collared peccaries, agoutis, cavies, and armadillos to preserve their ovarian and testicular tissues. Additionally, domestic species such as the domestic cat and donkeys have been proposed as models for wild species that are phylogenetically close. This review addresses the main technical aspects involved in obtaining BRB derived from gonadal tissues in some wild species of the Caatinga biome. It reports recent advances and perspectives to use these biological materials for wildlife conservation.


biodiversity, wildlife conservation, genome resource banking, ovarian tissue, testicular tissue


Amelkina O, Silva AM, Silva AR, Comizzoli P. Feline microRNAome in ovary and testis: exploration of in-silico miRNA-mRNA networks involved in gonadal function and cellular stress response. Front Genet. 2022;13:1009220. PMid:36226169.

Arroyo MAM, Silva FFS, Santos PRS, Silva AR, Oliveira MF, Assis-Neto AC. Ultrastructure of spermatogenesis and spermatozoa in agoutis during sexual development. Reprod Fertil Dev. 2017;29(2):383-93. PMid:26336816.

Assis-Neto ACD, Melo MIVD, Carvalho MAMD, Miglino MA, Oliveira MFD, Menezes DJAD, Papa PC, Kfoury JR Jr. Qualitative analysis of the established spermatogenesis in agoutis (Dasyprocta aguti) rised in captivity. Braz J Vet Res Anim Sci. 2003;40:180-4.

Brasil AV, Silva AM, Campos LB, Praxedes ECG, Antunes JMAP, Silva AR. Estimation of the preantral follicles ovarian population in six-banded armadillos (Euphractus sexcinctus) infected or not by the Mycobacterium leprae. Anim Reprod. 2021;29:42.

Campos LB, Praxedes ECG, Saraiva MVA, Comizzoli P, Silva AR. Advances and challenges of using ovarian preantral follicles to develop biobanks of wild mammals. Biopreserv Biobank. 2019a;17(4):334-41. PMid:30896983.

Campos LB, Silva AM, Praxedes ECG, Bezerra LGP, Lins TLBG, Menezes VG, Matos MHT, Lima GL, Rodrigues APR, Silva AR. Vitrification of collared peccary ovarian tissue using open or closed systems and different intracellular cryoprotectants. Cryobiology. 2019b;91:77-83. PMid:31639331.

Campos LB, Silva AM, Praxedes ECG, Freitas J, Bezerra LGP, Melo LM, Pereira AF, Figueiredo JR, Silva AR. Effect of growth differentiation factor 9 (GDF-9) on in vitro development of collared peccary preantral follicles enclosed in ovarian tissues. Anim Reprod Sci. 2021;226:106717. PMid:33579546.

Campos-Júnior PHA, Costa GM, Avelar GF, Lacerda SM, da Costa NN, Ohashi OM, Miranda MS, Barcelos LS, Jorge EC, Guimarães DA, de França LR. Derivation of sperm from xenografted testis cells and tissues of the peccary (Tayassu tajacu). Reproduction. 2014;147(3):291-9. PMid:24324205.

Carvalho AA, Faustino LR, Figueiredo JR, Rodrigues APR, Costa APR. Vitrification: an alternative for preserving embryos and genetic material mammalian females in cryobanking. Acta Vet Bras. 2011;5(3):236-48.

Costa GMJ, Leal MC, Silva JV, Ferreira ACS, Guimarães DA, França LR. Spermatogenic cycle length and sperm production in a feral pig species (Collared Peccary, Tayassu tajacu). J Androl. 2010;31(2):221-30. PMid:19745218.

dela Peña EC, Takahashi Y, Katagiri S, Atabay EC, Nagano M. Birth of pups after transfer of mouse embryos derived from vitrified preantral follicles. Reproduction. 2002;123(4):593-600. PMid:11914121.

Doležel R, Kyliánková R, Kummer V, Mašková J, Stará P, Vitásek R. Follicular population and oestrogen receptor alpha in ovary of the bitch. Acta Vet Brno. 2004;73(1):37-43.

Fayomi AP, Peters K, Sukhwani M, Valli-Pulaski H, Shetty G, Meistrich ML, Houser L, Robertson N, Roberts V, Ramsey C, Hanna C, Hennebold JD, Dobrinski I, Orwig KE. Autologous grafting of cryopreserved prepubertal rhesus testis produces sperm and offspring. Science. 2019;363(6433):1314-9. PMid:30898927.

Fernandes DP, Praxedes EA, Freitas CIA, Pereira AF. Ex situ approaches for the conservation of genetic resources in the superorder Xenarthra. Biopreserv Biobank. 2023. In press. PMid:36409545.

Figueiredo JR, Cadenas J, Lima LF, Santos RR. Advances in in vitro folliculogenesis in domestic ruminants. Anim Reprod. 2020;16(1):52-65. PMid:33936289.

Gomes HAN, Campos LB, Praxedes ECG, Oliveira MF, Pereira AF, Silva AR, Saraiva MVA. BMP-15 activity on in vitro development of collared peccary (Pecari tajacu Linnaeus, 1758) preantral follicles. Reprod Domest Anim. 2020;55(8):958-64. PMid:32473042.

Gosden RG, Telfer E. Numbers of follicles and oocytes in mammalian ovaries and their allometric relationships. J Zool. 1987;211(1):169-75.

Holt WV, Comizzoli P. Genome resource banking for wildlife conservation: promises and caveats. Cryo Lett. 2021;42(6):309-20. PMid:35366296.

International Union for Conservation of Nature - IUCN. The International Union for Conservation of Nature's (IUCN) red list of threatened species. Version 2021‐2 [Internet]. 2022 [cited 2023 Jan 2]. Available from:

Kaneko H, Kikuchi K, Nakai M, Somfai T, Noguchi J, Tanihara F, Ito J, Kashiwazaki N. Generation of live piglets for the first time using sperm retrieved from immature testicular tissue cryopreserved and grafted into nude mice. PLoS One. 2013;8(7):1-8. PMid:23923039.

León-Quinto T, Simon MA, Cadenas R, Jones J, Martinez-Hernandez FJ, Moreno JM, Vargas A, Martinez F, Soria B. Developing biological resource banks as a supporting tool for wildlife reproduction and conservation The Iberian lynx bank as a model for other endangered species. Anim Reprod Sci. 2009;112(3-4):347-61. PMid:18585877.

Lima GL, Luz VB, Lima LF, Rocha RMP, Castro SV, Castelo TS, Rodrigues A, Figueiredo JR, Silva AR. Interactions between different media and follicle-stimulating hormone supplementation on in vitro culture of preantral follicles enclosed in ovarian tissue derived from collared peccaries (Pecari tajacu Linneaus, 1758). Reprod Domest Anim. 2018;53(4):880-8. PMid:29604127.

Lima GL, Luz VB, Lunardi FO, Souza AL, Peixoto GC, Rodrigues APR, Oliveira MF, Santos RR, Silva AR. Effect of cryoprotectant type and concentration on the vitrification of collared Peccary (Pecari tajacu) ovarian tissue. Anim Reprod Sci. 2019;205:126-33. PMid:31047761.

Lima GL, Santos EAA, Lima LF, Luz VB, Rodrigues APR, Silva AR. Short-term preservation of Pecari tajacu ovarian preantral follicles using phosphate buffered saline (PBS) or powdered coconut water (ACP) media. Arq Bras Med Vet Zootec. 2014;66(6):1623-30.

Lima GL, Santos EAA, Luz VB, Rodrigues APR, Silva AR. Morphological characterization of the ovarian preantral follicle population of collared peccaries (Tayassu tajacu Linnaeus, 1758). Anat Histol Embryol. 2012;42(4):304-11. PMid:23278244.

Lopes KRF, Lima GL, Bezerra LGP, Barreto-Junior RA, Oliveira MF, Silva AR. Characterization of the ovarian preantral follicle populations and its correlation with age and nutritional status in Brazilian Northeastern donkeys (Equus assinus). Anim Reprod Sci. 2017;187:193-202. PMid:29126831.

Lopes KRF, Praxedes EC, Campos LB, Bezerra MB, Lima GL, Saraiva MVA, Silva AR. Vitrification of ovarian tissue of Brazilian North-eastern donkeys (Equus asinus) using different cryoprotectants. Reprod Domest Anim. 2018;53(5):1060-7. PMid:29809292.

Lucci CM, Amorim CA, Rodrigues APR, Figueiredo JR, Báo SN, Silva JRV, Gonçalves PB. Study of preantral follicle population in situ and after mechanical isolation from caprine ovaries at different reproductive stages. Anim Reprod Sci. 1999;56(3-4):223-36. PMid:10497918.

Moreira SSJ, Lago AEA, Moura AAA, Silva AR. Impact of seminal plasma composition on sperm freezability in wild mammals: a review. Biopreserv Biobank. 2022;20(1):90-6. PMid:34726507.

Pizzutto CS, Colbachini H, Jorge-Neto PN. One Conservation: the integrated view of biodiversity conservation. Anim Reprod. 2021;18(2):e20210024. PMid:34122656.

Praxedes EA, Borges AA, Santos MVO, Pereira AF. Use of somatic cell banks in the conservation of wild felids. Zoo Biol. 2018a;37(4):258-63. PMid:29722907.

Praxedes ÉCG, Lima GL, Bezerra LGP, Santos FA, Bezerra MB, Guerreiro DD, Rodrigues APR, Domingues SFS, Silva AR. Development of fresh and vitrified agouti ovarian tissue after xenografting to ovariectomised severe combined immunodeficiency (SCID) mice. Reprod Fertil Dev. 2018b;30(3):459-68. PMid:28784201.

Praxedes ECG, Peixoto GCX, Silva AM, Silva AR. Reproduction in agouti (Dasyprocta spp.): a review of reproductive physiology for developing assisted reproductive techniques. Anim Reprod. 2018c;15(4):1181-92. PMid:34221130.

Praxedes ÉCG, Bezerra LCG, Moreira SSJ, Santos CS, Brasil AV, Silva AMD, Guerreiro DD, Pereira AF, Rodrigues APR, Silva AR. Microbiological load and preantral follicle preservation using different systems for ovarian tissue vitrification in the red-rumped agouti. Cryobiology. 2021;103:123-8. PMid:34454959.

Praxedes ECG, Lima GL, Silva AM, Apolinário CA, Bezerra JA, Souza AL, Oliveira MF, Rodrigues APR, Silva AR. Characterisation and cryopreservation of the ovarian preantral follicle population from Spix. Reprod Fertil Dev. 2017;29(3):594-602. PMid:28442066.

Praxedes ECG, Lima GL, Silva AM, Campos LB, Souza CM, Moreira SSJ, Oliveira MF, Silva AR. Comparison of different intracellular cryoprotectants on the solid surface vitrification of red-rumped agouti (Lichtenstein, 1823) ovarian tissue. Reprod Domest Anim. 2020;55(2):154-61. PMid:31804747.

Santos EA, Lima GL, Praxedes ECG, Silva AM, Maia KM, Oliveira MF, Rodrigues APR, Silva AR. Estimation, morphometry and ultrastructure of ovarian preantral follicle population in agouti (Dasyprocta leporina). Pesq Vet Bras. 2018;38(1):175-82.

Santos PRS, Oliveira MF, Arroyo MAM, Silva AR, Rici REG, Miglino MA, Assis Neto AC. Ultrastructure of spermatogenesis in Spix’s yellow-toothed cavy (Galea spixii). Reproduction. 2014;147(1):13-9. PMid:24101585.

Santos PRS, Oliveira MF, Silva AR, Assis AC No. Development of spermatogenesis in captive-bred Spix’s yellow-toothed cavy (Galea spixii). Reprod Fertil Dev. 2012;24(6):877-85. PMid:22781939.

Shinohara T, Inoue K, Ogonuki N, Kanatsu-Shinohara M, Miki H, Nakata K, Kurome M, Nagashima H, Toyokuni S, Kogishi K, Honjo T, Ogura A. Birth of offspring following transplantation of cryopreserved immature testicular pieces and in-vitro microinsemination. Hum Reprod. 2002;17(12):3039-45. PMid:12456600.

Silva AM, Bezerra LGP, Praxedes ECG, Moreira SSJ, Souza CMP, Oliveira MF, Pereira AF, Comizzoli P, Silva AR. Combination of intracellular cryoprotectants preserves the structure and the cells proliferative capacity potential of adult collared peccary testicular tissue subjected to solid surface vitrification. Cryobiology. 2019a;91:53-60. PMid:31678072.

Silva AM, Pereira AG, Praxedes ECG, Moreira SSJ, Oliveira MF, Comizzoli P, Silva AR. Vitrification of testicular tissue from adult Spix’s yellow-toothed cavies (Galea spixii) using different cryoprotectants. In: Proceedings of the Society for the Study of Reproduction 2019 Annual Meeting; 2019; San José. San José: Society for the Study of Reproduction; 2019b.

Silva AM, Pereira AF, Comizzoli P, Silva AR. Cryopreservation and culture of testicular tissues: an essential tool for biodiversity preservation. Biopreserv Biobank. 2020;18(3):235-43. PMid:32282240.

Silva AM, Bezerra LGP, Pereira AG, Pereira AF, Oliveira MF, Comizzoli P, Silva AR. In vitro culture of testicular tissue from prepubertal collared peccaries using different culture media supplemented with various GDNF concentrations. Anim Reprod. 2021a;19:65.

Silva AM, Pereira AG, Brasil AV, Souza-Junior JBF, Moura CEB, Pereira AF, Oliveira MF, Comizzoli P, Silva AR. Influence of freezing techniques and glycerol-based cryoprotectant combinations on the survival of testicular tissues from adult collared peccaries. Theriogenology. 2021b;167:111-9. PMid:33813051.

Silva AM, Pereira AG, Bezerra LGP, Moreira SSJ, Pereira AF, Oliveira MF, Comizzoli P, Silva AR. Cryopreservation of testicular tissue from adult red-rumped agoutis (Dasyprocta leporina Linnaeus, 1758). Animals. 2022;12(6):738. PMid:35327135.

Silva AR, Castelo TS, Lima GL, Peixoto GCX. Conservation of germplasm from wild animals of the Caatinga biome. Acta Sci Vet. 2010;38:373-89.

Silva AR, Lima GL, Peixoto GCX, Souza AL. Cryopreservation in mammalian conservation biology: current applications and potential utility. RRBS. 2015;4:1-8.

Singina GN, Volkova NA, Bagirov VA, Zinovieva NA. Cryobanking of somatic cells in conservation of animal genetic resources: prospects and successes. Sh Biol. 2014;6(6):3-14.

Souza-Fabjan JMG, Batista RITP, Melo LM, Oliveira MAL, Chaves MS, Fonseca JF, Freitas VJF. Transcervical versus laparotomy embryo recovery: what strategy is best for embryo bank formation in the Canindé goat conservation Program? Biopreserv Biobank. 2022;20(2):204-7. PMid:34491078.

Stadtländer CTH. The role of zoological institutions in a changing world: a review of the ark and beyond: the evolution of zoo and aquarium conservation, 2022. Zoo Biol. 2022;zoo.21698. In press.

Wanderley LS, Luz HK, Faustino LR, Lima IM, Lopes CA, Silva AR, Báo SN, Campello CC, Rodrigues AP, Figueiredo JR. Ultrastructural features of agouti (Dasyprocta aguti) preantral follicles cryopreserved using dimethyl sulfoxide, ethylene glycol and propanediol. Theriogenology. 2012;77(2):260-7. PMid:21924476.

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