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García MF, Favre RN, Rearte R, Stornelli MC, Jurado S, de la Sota L, Stornelli MA. Effect of seminal plasma cholesterol and triacylglycerides concentrations and sperm morphology on semen freezability in domestic cats (Felis silvestris catus). Top Companion Anim Med 2024; 62:100907. [PMID: 39168446 DOI: 10.1016/j.tcam.2024.100907] [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: 05/12/2023] [Revised: 08/14/2024] [Accepted: 08/14/2024] [Indexed: 08/23/2024]
Abstract
There is scarce information about the effect of sperm morphology and seminal plasma composition on cat semen freezability. Thus, this study aims to assess the effect of cat sperm morphology and seminal plasma cholesterol (CHOL) and triacylglyceride (TAG) concentrations on sperm post-thaw survival. Ejaculates (n = 49) were evaluated, and seminal plasma was separated and frozen until CHOL and TAG concentrations were measured. The sperm pellet was diluted in a tris-based egg yolk extender, frozen (n = 38), or processed for sperm ultrastructure study (n = 11). Abnormalities recorded were abnormal head shape and size, detached heads, knobbed or ruffled acrosomes, eccentric mid-piece insertion, proximal and distal cytoplasmic droplets, folded and coiled tails, and Dag defect. Ultramicroscopic evaluation detected several sperm abnormalities in fresh semen and some sperm damage in frozen semen. Seminal plasma lipids components were positively correlated with post-thaw motility and acrosome integrity. Higher freezability indices for motility and acrosome integrity were observed in frozen-thawed semen with high seminal plasma CHOL and TAG concentrations. No freezability differences were observed between teratozoospermic and normozoospermic ejaculates. Our results showed that even when seminal plasma was removed before cryopreservation, sperm survival after thawing was significantly higher in samples with high seminal plasma CHOL and TAG concentrations, indicating a rapid adherence to these compounds to the sperm plasma membrane, protecting sperm cells from temperature changes. Nevertheless, there were no differences in sperm freezability by sperm morphology.
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Affiliation(s)
- María Florencia García
- National Scientific and Technical Research Council -CONICET, CABA, Argentina; Instituto de Investigaciones en Reproducción Animal, Faculty of Veterinary Sciences, La Plata National University, Argentina
| | - Romina Nuñez Favre
- National Scientific and Technical Research Council -CONICET, CABA, Argentina; Instituto de Investigaciones en Reproducción Animal, Faculty of Veterinary Sciences, La Plata National University, Argentina
| | - Ramiro Rearte
- National Scientific and Technical Research Council -CONICET, CABA, Argentina; Instituto de Investigaciones en Reproducción Animal, Faculty of Veterinary Sciences, La Plata National University, Argentina
| | - María Cecilia Stornelli
- Instituto de Investigaciones en Reproducción Animal, Faculty of Veterinary Sciences, La Plata National University, Argentina
| | - Susana Jurado
- Instituto de Investigaciones en Reproducción Animal, Faculty of Veterinary Sciences, La Plata National University, Argentina
| | - Luzbel de la Sota
- National Scientific and Technical Research Council -CONICET, CABA, Argentina; Instituto de Investigaciones en Reproducción Animal, Faculty of Veterinary Sciences, La Plata National University, Argentina
| | - María Alejandra Stornelli
- Instituto de Investigaciones en Reproducción Animal, Faculty of Veterinary Sciences, La Plata National University, Argentina.
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Peris-Frau P, Benito-Blanco J, Martínez-Nevado E, Toledano-Díaz A, Castaño C, Velázquez R, Pequeño B, Martinez-Madrid B, Esteso MC, Santiago-Moreno J. DNA integrity and viability of testicular cells from diverse wild species after slow freezing or vitrification. Front Vet Sci 2023; 9:1114695. [PMID: 36727036 PMCID: PMC9884681 DOI: 10.3389/fvets.2022.1114695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 12/30/2022] [Indexed: 01/19/2023] Open
Abstract
Introduction and objective Cryopreservation of testicular tissues offers new possibilities to protect endangered species, genetically valuable individuals or even the fertility potential of prepubertal individuals who have died unexpectedly. However, the use of this technique still remains a challenge. In this study, slow freezing and vitrification of testicular tissue was investigated to find out which cryopreservation method could better preserve the viability and DNA integrity of testicular germ cells in diverse wild species. Methods Testes were obtained post-mortem from 18 artiodactyls (wild boar, roe deer, dwarf goat, mhor gazelle, European mouflon, African forest buffalo, Malayan tapir, dorcas gazelle, Iberian ibex, gnu, red river hog), 5 primates (colobus monkey, capuchin monkey, mandrill), 8 carnivores (gray wolf, Persian leopard, binturong, European mink, American black bear, suricata), and 2 rodents (Patagonian mara). The testicles belonged to adult individuals and were cut into small pieces and cryopreserved by needle immersed vitrification or uncontrolled slow freezing using a passive cooling device. After warming or thawing, testicular tissues were enzymatically digested and two germ cell types were differentiated based on their morphology: rounded cells (spermatogonia, spermatocytes, and early spermatids) and elongated cells (elongated spermatids and spermatozoa). Cell viability was assessed by SYBR-14/propidium iodide while DNA fragmentation by TUNEL assay with fluorescence microscope. Results and discussion Our preliminary results revealed that our uncontrolled slow freezing method better preserved the viability and DNA integrity of elongated cells than vitrification. Such trend was observed in all species, being significant in artiodactyls, carnivores, and primates. Similarly, the viability and DNA integrity of rounded cells was also better maintained in primates by uncontrolled slow freezing, while in carnivores, vitrification by needle immersion showed better results in this type of cells. In artiodactyls and rodents both techniques preserved the viability of rounded cells in a similar manner, although the DNA integrity of these cells was greater after needle immersed vitrification in artiodactyls. Conclusions In conclusion, the effectiveness of each cryopreservation method is affected by the phylogenetic diversity between species and cell type.
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Affiliation(s)
- Patricia Peris-Frau
- Departamento de Reproducción Animal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria-CSIC, Madrid, Spain,*Correspondence: Patricia Peris-Frau ✉
| | - Julia Benito-Blanco
- Departamento de Reproducción Animal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria-CSIC, Madrid, Spain
| | | | - Adolfo Toledano-Díaz
- Departamento de Reproducción Animal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria-CSIC, Madrid, Spain
| | - Cristina Castaño
- Departamento de Reproducción Animal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria-CSIC, Madrid, Spain
| | - Rosario Velázquez
- Departamento de Reproducción Animal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria-CSIC, Madrid, Spain
| | - Belén Pequeño
- Departamento de Reproducción Animal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria-CSIC, Madrid, Spain
| | - Belén Martinez-Madrid
- Department of Animal Medicine and Surgery, Faculty of Veterinary Medicine, Complutense University of Madrid, Madrid, Spain
| | - Milagros C. Esteso
- Departamento de Reproducción Animal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria-CSIC, Madrid, Spain
| | - Julián Santiago-Moreno
- Departamento de Reproducción Animal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria-CSIC, Madrid, Spain
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Testicular Tissue Vitrification: a Promising Strategy for Male Fertility Preservation. Reprod Sci 2022; 30:1687-1700. [DOI: 10.1007/s43032-022-01113-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 09/16/2022] [Indexed: 11/24/2022]
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Cryopreservation of testicular tissue from the dog (Canis familiaris) and wild boar (Sus scrofa) by slow freezing and vitrification: Differences in cryoresistance according to cell type. Theriogenology 2022; 190:65-72. [DOI: 10.1016/j.theriogenology.2022.07.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 07/20/2022] [Accepted: 07/31/2022] [Indexed: 11/18/2022]
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Strategies for cryopreservation of testicular cells and tissues in cancer and genetic diseases. Cell Tissue Res 2021; 385:1-19. [PMID: 33791878 DOI: 10.1007/s00441-021-03437-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 02/18/2021] [Indexed: 12/15/2022]
Abstract
Cryopreservation of testicular cells and tissues is useful for the preservation and restoration of fertility in pre-pubertal males expecting gonadotoxic treatment for cancer and genetic diseases causing impaired spermatogenesis. A number of freezing and vitrification protocols have thus been tried and variable results have been reported in terms of cell viability spermatogenesis progression and the production of fertile spermatozoa. A few studies have also reported the production of live offspring from cryopreserved testicular stem cells and tissues in rodents but their replication in large animals and human have been lacking. Advancement in in vitro spermatogenesis system has improved the possibility of producing fertile spermatozoa from the cryopreserved testis and has reduced the dependency on transplantation. This review provides an update on various cryopreservation strategies for fertility preservation in males expecting gonadotoxic treatment. It also discusses various methods of assessing and ameliorating cryoinjuries. Newer developments on in vitro spermatogenesis and testicular tissue engineering for in vitro sperm production from cryopreserved SSCs and testicular tissue are also discussed.
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Davis AC, Richards EG, Arian SE, Falcone T, Desai N, Yao M, Chiesa-Vottero A, Flyckt R. Diverse Approaches to Ovarian Tissue Cryopreservation Have Equivalent Outcomes in Markers of Tissue Viability. Reprod Sci 2021; 28:2129-2135. [PMID: 33599949 DOI: 10.1007/s43032-021-00486-6] [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: 07/10/2020] [Accepted: 02/02/2021] [Indexed: 11/29/2022]
Abstract
Ovarian tissue cryopreservation (OTC) is an accepted method of fertility preservation. However, OTC is not standardized and many variations exist in the freezing strategy, tissue processing, and surgical approach. In this pilot study, we used a sheep model to compare slow freezing versus vitrification techniques, as well as the feasibility of processing ovarian tissue into a hyaluronan suspension of small ovarian units. Twelve ovaries were harvested from six female ewes. Paired tissues from each animal were assigned to different treatments and underwent freezing, thawing, autotransplantation, and second-look surgery, for a total of 18 surgical procedures and 3 measured time points. Treatments included whole tissue strips versus gel suspension and slow freezing versus vitrification. At each of the time points, tissue viability was measured by immunohistochemical analysis of CD31 and cleaved caspase-3 (CCASP3). CD31 and CCASP3 expression levels were equivalent between slow freezing and vitrification, and between whole ovarian tissue strips and gel suspension of fragmented ovarian tissue, at all time points. These preliminary data using a sheep model suggest that ovarian tissue is robust and likely to be minimally affected by aggressive fragmentation using a hyaluronan suspension. Furthermore, we provide evidence in support of vitrification as a viable option in OTC. Hyaluronan suspension of ovarian cortical fragments is novel and may represent a desirable method for reimplantation of frozen-thawed ovarian tissue in patients where occult malignant cells are a concern.
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Affiliation(s)
- Anne Cashmore Davis
- Women's Health Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44915, USA
| | - Elliott G Richards
- Women's Health Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44915, USA.
| | - Sara E Arian
- Division of Reproductive Endocrinology and Infertility, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Tommaso Falcone
- Women's Health Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44915, USA
| | - Nina Desai
- Women's Health Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44915, USA
| | - Meng Yao
- Department of Qualitative Health Sciences, Cleveland Clinic, Cleveland, OH, 44195, USA
| | - Andres Chiesa-Vottero
- Pathology and Laboratory Medicine Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, USA
| | - Rebecca Flyckt
- Women's Health Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44915, USA.,Reproductive Endocrinology and Infertility, University Hospitals, 1000 Auburn Dr., Suite 310, Beachwood, OH, 44122, USA
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Luvoni GC, Colombo M. Cold case: Small animal gametes cryobanking. Theriogenology 2020; 150:445-451. [PMID: 32164990 DOI: 10.1016/j.theriogenology.2020.02.047] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 02/29/2020] [Indexed: 01/06/2023]
Abstract
Germplasm preservation of animals, whether they are valuable domestic breeds or rare species, is the main goal of gamete cryobanking. Dogs and cats act as models for this purpose thanks to the wide availability of biological material which can be employed to experiment protocols that can then be applied to wild animals. This review is focused on spermatozoa, oocytes and gonadal tissues cryobanking in small domestic animals, which is still an unsolved case. Like in a courtroom, evidences of cryoinjuries affecting cellular structures will be presented, penalties as loss of functionality due to cellular alterations will be described, and appeal as strategies to protect gametes from damages or rescue their functionality will be discussed. Differences and similarities between single cell or tissue cryopreservation will be highlighted, together with the rationale for the choice of one type of preservation or another and the fundamental principles which they are based on. The deep analysis of different aspects that still hamper the success of cryopreservation in small animals can help clarify where research is most needed. Therefore, as in a cold case, investigation should remain open in order to hopefully find the solution and make these procedures more and more efficient in the future.
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Affiliation(s)
- Gaia Cecilia Luvoni
- Dipartimento di Scienze Veterinarie per la Salute, la Produzione Animale e la Sicurezza Alimentare "Carlo Cantoni", Università degli Studi di Milano, Via Celoria 10, 20133, Milan, Italy.
| | - Martina Colombo
- Dipartimento di Scienze Veterinarie per la Salute, la Produzione Animale e la Sicurezza Alimentare "Carlo Cantoni", Università degli Studi di Milano, Via Celoria 10, 20133, Milan, Italy.
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Thongphakdee A, Sukparangsi W, Comizzoli P, Chatdarong K. Reproductive biology and biotechnologies in wild felids. Theriogenology 2020; 150:360-373. [PMID: 32102745 DOI: 10.1016/j.theriogenology.2020.02.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Accepted: 02/03/2020] [Indexed: 12/18/2022]
Abstract
Conservation strategies in natural habitats as well as in breeding centers are necessary for maintaining and reinforcing viable populations of wild felids. Among the fundamental knowledge that is required for conservation breeding, a solid understanding of reproductive biology is critical for improving natural breeding and enhance genetic diversity. Additionally, it offers the opportunity to develop assisted reproductive technologies (ARTs) in threatened and endangered species. Conservation breeding and reproductive biotechnologies of wild felids have advanced in the past decade. It has been clearly shown that female felids have species and individual patterns of reproductive cycles and respond differently to exogenous hormones. In males, several species still have poor semen quality often due to the loss of genetic diversity in small populations. To overcome the challenges of natural breeding (incompatibility between individuals or suboptimal environment) and mitigate inbreeding, artificial insemination, embryo production and embryo transfer have been further developed in 24 wild cat species. Major factors limiting ART success are inconsistent responses to ovarian stimulation, variable quality of gametes and embryos, and preparation of recipient females. Additional approaches including stem cell technologies have been explored for future medical applications. However, there still is a critical need for better knowledge of feline reproductive biology and improvement of ARTs efficiency to increase the genetic diversity and create sustainable populations of wild felids.
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Affiliation(s)
- Ampika Thongphakdee
- Wildlife Reproductive Innovation Center, Bureau of Conservation and Research, Zoological Park Organization Under the Royal Patronage of H.M. the King, 267, Pracharaj 1 Road, Bang Sue, Bangkok, 10800, Thailand.
| | - Woranop Sukparangsi
- Department of Biology, Faculty of Science, Burapha University, Saen Suk, Muang, Chonburi, 20131, Thailand
| | - Pierre Comizzoli
- Smithsonian Conservation Biology Institute, National Zoological Park, 3001 Connecticut Ave, NW, Washington, DC, 2008, USA
| | - Kaywalee Chatdarong
- Research Unit of Obstetrics and Reproduction in Animals, Department of Obstetrics, Gynecology and Reproduction, Faculty of Veterinary Science, Chulalongkorn University, Henri-Dunant Road, Bangkok, 10330, Thailand
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Effect of cryopreservation on sperm DNA fragmentation and apoptosis rates in the testicular tissue of domestic cats. Anim Reprod Sci 2019; 211:106224. [PMID: 31785625 DOI: 10.1016/j.anireprosci.2019.106224] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 09/15/2019] [Accepted: 10/26/2019] [Indexed: 11/23/2022]
Abstract
The objectives of the present study were to evaluate the damage caused by cryopreservation on sperm DNA and estimate the percentage of cell apoptosis in tissue after thawing. Testicles of cats were sectioned into of 0.3 cm3 and 0.5 cm3 fragments and evaluated for DNA damage using acridine orange and semi-quantitatively through histo-morphological and immunohistochemical methods (caspase-3). Other fragments were placed in cryotubes with diluent containing either 3% glycerol or 3% propanediol, and were cryopreserved. Evaluation using acridine orange indicated there was a difference with use of propanediol and glycerol on DNA damage in 0.5 cm3fragments, with the latter being more effective than the former for cryopreservation. Results from histomorphological evaluations indicated there was a greater cell integrity among germ cells that were not cryopreserved, based on criteria assessed (detachment of cells from basal membrane, retraction of seminiferous tubule epithelium, visibility of the spermatogonia nucleoli and nuclear spermatogonia condensation), for both sizes of fragments. The values for these variables decreased after cryopreservation, with there being no differences as a result of size of fragment stored or between cryoprotectants used (P > 0.05). The staining for caspase-3 differed for the cytoplasm, nuclei and germ cells. Assessment of these staining patterns indicated the fresh fragments had an amount of cell damage and there was a similar amount of damage detected in cryopreserved fragments. This finding indicated that there was considerable efficacy in preserving the tissue fragments with use of the freezing protocols that were evaluated in this study.
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Lima DBC, Silva TFPD, Aquino-Cortez A, Leiva-Revilla J, Silva LDMD. Vitrification of testicular tissue from prepubertal cats in cryotubes using different cryoprotectant associations. Theriogenology 2018; 110:110-115. [PMID: 29353141 DOI: 10.1016/j.theriogenology.2017.12.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 12/22/2017] [Accepted: 12/27/2017] [Indexed: 10/18/2022]
Abstract
Protocols for the cryopreservation of testicular tissue are not yet established. In cats, few studies have been conducted on testicular vitrification using different cryoprotectant associations (CPAs). Thus, the objective of this study was to compare the effect of different CPAs on the vitrification of testicular tissue from prepubertal cats in cryotubes. We used 10 pairs of testicles, with each pair divided into 8 fragments that were distributed into different experimental groups. Two of these fragments were allocated into the control group (CG) and the other six were distributed according to the CPAs to be tested (dimethyl sulfoxide (DMSO)/glycerol (GLY), ethylene glycol (EG)/GLY, or DMSO/EG). The cryoprotectants were used at a final concentration of 5.6 M. The fragments were subjected to vitrification in cryotubes and after 1 week, they were warmed and processed for histomorphologic assessment, quantification of nucleolar organizer regions (NORs), and determination of cell viability. The DMSO/EG and EG/GLY groups presented the greatest cell separation from the cell basement membrane and the highest degrees of retraction of the basal membrane. In these aspects, DMSO/GLY did not differ from the CG and both were significantly superior to the other groups. In terms of cell distinction, visibility of the nucleus, and nuclear condensation, all the vitrified groups had significantly lower values than the CG, while the DMSO/GLY and EG/GLY groups did not differ between themselves. Through the quantification of NORs, the potential for cell proliferation of the CG was found to have a mean of 3.80, while DMSO/GLY presented a mean of 3.60, and thus there was no significant difference between these two groups. The proliferation potentials of both groups were significantly superior to that of the DMSO/EG (mean: 2.07) and EG/GLY (mean: 1.98) groups. In the CG and DMSO/GLY group, 91.8% and 64.2% of cells, respectively, were found to be viable. The cell viabilities of both groups were significantly superior to those of DMSO/EG (52.5%) and EG/GLY (57.10%). Vitrification in cryotubes combined with the use of the DMSO/GLY association was effective in maintaining the histomorphology, cell proliferation potential, and cell viability of testicular tissue from prepubertal cats after cryopreservation.
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Affiliation(s)
- David Baruc Cruvinel Lima
- Laboratory of Carnivore Reproduction, School of Veterinary Medicine, State University of Ceará (Universidade Estadual do Ceará, UECE) - 1700, Doutor Silas Munguba Avenue, CEP 60714-903, Fortaleza, CE, Brazil.
| | - Ticiana Franco Pereira da Silva
- Laboratory of Carnivore Reproduction, School of Veterinary Medicine, State University of Ceará (Universidade Estadual do Ceará, UECE) - 1700, Doutor Silas Munguba Avenue, CEP 60714-903, Fortaleza, CE, Brazil
| | - Annice Aquino-Cortez
- Laboratory of Carnivore Reproduction, School of Veterinary Medicine, State University of Ceará (Universidade Estadual do Ceará, UECE) - 1700, Doutor Silas Munguba Avenue, CEP 60714-903, Fortaleza, CE, Brazil
| | - Johanna Leiva-Revilla
- Laboratory of Manipulation of Oocytes and Preantral Follicles, School of Veterinary Medicine, State University of Ceará (Universidade Estadual do Ceará, UECE) - 1700, Doutor Silas Munguba Avenue, CEP 60714-903, Fortaleza, CE, Brazil
| | - Lúcia Daniel Machado da Silva
- Laboratory of Carnivore Reproduction, School of Veterinary Medicine, State University of Ceará (Universidade Estadual do Ceará, UECE) - 1700, Doutor Silas Munguba Avenue, CEP 60714-903, Fortaleza, CE, Brazil
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Chatdarong K. Retained fertilizing capability in cryopreserved feline spermatozoa. Reprod Domest Anim 2016; 52 Suppl 2:261-264. [DOI: 10.1111/rda.12855] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- K Chatdarong
- Department of Obstetrics, Gynaecology and Reproduction; Faculty of Veterinary Science; Chulalongkorn University; Bangkok Thailand
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