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Liman N, Kuzkale M. Heat shock proteins exhibit distinct spatiotemporal expression patterns in the domestic cat ( Felis catus) ovary during the oestrous cycle. Reprod Fertil Dev 2022; 34:498-515. [PMID: 35115081 DOI: 10.1071/rd21155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 12/12/2021] [Indexed: 11/23/2022] Open
Abstract
Heat shock proteins (HSP) are significant regulators of cell proliferation, differentiation and apoptosis. HSP participate in ovarian physiology through proliferative and apoptotic mechanisms and the modulation of sex steroid receptor functions. We investigated whether the expression and localisation patterns of HSP in the domestic cat ovary vary with the oestrous cycle stage. Immunohistochemical analysis revealed cell type-specific localisation patterns of HSPD1/HSP60, HSPA/HSP70, HSPC/HSP90 and HSPH/HSP105 in several ovarian cells of the domestic cat, including oocytes, follicular (granulosa and theca cells) and luteal cells, stromal and thecal interstitial cells, stromal cells, and vascular endothelial and smooth muscle cells during the anoestrous, follicular and luteal phases of the oestrous cycle. Western blot results showed that the expression of three HSP (HSPD1/HSP60, HSPA/HSP70 and HSPH/HSP105) varied with the oestrous cycle stage. While the maximal expression of HSPD1/HSP60 and HSPH/HSP105 occurred during the luteal phase, the expression of HSPA/HSP70 was minimal. The expressions of HSPA/HSP70 and HSPH/HSP105 were low during the follicular phase compared to the anoestrous phase. In conclusion, the alterations that occur in the expression of HSP in the domestic cat ovary during the different stages of the oestrous cycle imply that these proteins participate in the regulation of ovarian function under different physiological conditions.
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Affiliation(s)
- Narin Liman
- Department of Histology and Embryology, Faculty of Veterinary Medicine, University of Erciyes, 38039, Kayseri, Turkey
| | - Murat Kuzkale
- Republic of Turkey Minister of Agriculture and Forestry, Afyonkarahisar Food Control Laboratory Directorate, 03100, Afyonkarahisar, Turkey
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2
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Vilela JDMV, Dolmans MM, Amorim CA. Ovarian tissue transportation: a systematic review. Reprod Biomed Online 2020; 42:351-365. [PMID: 33288476 DOI: 10.1016/j.rbmo.2020.11.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 11/06/2020] [Accepted: 11/06/2020] [Indexed: 12/20/2022]
Abstract
In recent years, some countries and fertility preservation networks have started adopting 24 h transportation for ovarian tissue, a practice that has the potential to spread very quickly due to the high costs and bureaucracy involved in the establishment of ovarian tissue cryobanks. While pregnancies and live births have been reported after such long periods of transportation, this, however, remains an empirical procedure. This review aims to prompt reflection on ovarian tissue transport, highlighting the lack of knowledge in humans by providing a counterpoint looking into more than 40 studies published in different animal models. By discussing these studies in animals, the findings of various models can be deciphered, and light shed on the patterns identified. Like the development of different assisted reproductive technology procedures, this is an important step in creating guidelines for future studies on human ovarian tissue transportation.
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Affiliation(s)
| | - Marie-Madeleine Dolmans
- Pôle de Recherche en Gynécologie, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Brussels, Belgium; Gynecology Department, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - Christiani Andrade Amorim
- Pôle de Recherche en Gynécologie, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Brussels, Belgium.
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3
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Vilela JDMV, Dolmans MM, Maruhashi E, Blackman MCNM, Sonveaux P, Miranda-Vilela AL, Amorim CA. Evidence of metabolic activity during low-temperature ovarian tissue preservation in different media. J Assist Reprod Genet 2020; 37:2477-2486. [PMID: 32885380 PMCID: PMC7550475 DOI: 10.1007/s10815-020-01935-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 08/25/2020] [Indexed: 12/17/2022] Open
Abstract
PURPOSE Although ovarian tissue transportation has been validated for up to 24 h, there is no standard protocol to date. We aimed to elucidate how existing media currently used for ovarian tissue transportation affect ovarian tissue metabolism and cell viability. METHODS Cow ovarian fragments were immersed in 0.9% NaCl solution, IVF medium, Leibovitz 15 medium (L-15), or PBS for 1, 4, or 24 h at 4 °C. Media were analyzed for pH, lactate dehydrogenase (LDH) activity, and glucose, pyruvate, and lactate concentrations, while apoptosis was assessed by TUNEL assays in fixed fragments. Viability rates were assessed by flow cytometry (FACS). RESULTS There were lower pH levels in NaCl at all time points compared with other media. LDH activity increased with time and was lowest in NaCl at 1 and 4 h. There was no significant difference in glucose levels, but a significant pyruvate decrease in L-15 and a significant lactate increase in all media. TUNEL showed apoptosis rates ranging from 0 to 5%. FACS showed a mean of 4% necrotic cells and 15-19% apoptotic cells after 1 h of incubation, but less than 1% necrotic cells and 2-6% apoptotic cells after 24 h in all media. CONCLUSION Our results indicate marked metabolic activity in ovarian tissue at 4 °C and suggest that cells use internal sources of energy, which may influence transplantation outcomes. This highlights the importance of better understanding whole tissue dynamics to develop a standard protocol for ovarian tissue transportation. Graphical abstract.
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Affiliation(s)
- Janice de M V Vilela
- Pôle de Recherche en Gynécologie, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Avenue Mounier 52, bte B1.52.02, 1200, Brussels, Belgium
| | - Marie-Madeleine Dolmans
- Pôle de Recherche en Gynécologie, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Avenue Mounier 52, bte B1.52.02, 1200, Brussels, Belgium
- Gynecology Department, Cliniques Universitaires Saint Luc, 1200, Brussels, Belgium
| | - Emi Maruhashi
- Pôle de Recherche en Gynécologie, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Avenue Mounier 52, bte B1.52.02, 1200, Brussels, Belgium
| | - Marine C N M Blackman
- Pôle de Pharmacologie et Thérapeutique, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, 1200, Brussels, Belgium
| | - Pierre Sonveaux
- Pôle de Pharmacologie et Thérapeutique, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, 1200, Brussels, Belgium
| | | | - Christiani A Amorim
- Pôle de Recherche en Gynécologie, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Avenue Mounier 52, bte B1.52.02, 1200, Brussels, Belgium.
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4
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Lopes EPF, Rodrigues GQ, de Brito DCC, Rocha RMP, Ferreira ACA, de Sá NAR, Silva RFD, de Alcântara GLH, Alves BG, Figueiredo JRD, Zelinski M, Rodrigues APR. Vitrification of caprine secondary and early antral follicles as a perspective to preserve fertility function. Reprod Biol 2020; 20:371-378. [PMID: 32418820 DOI: 10.1016/j.repbio.2020.05.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 04/28/2020] [Accepted: 05/03/2020] [Indexed: 01/09/2023]
Abstract
The present study aimed to evaluate the structure, survival and development of isolated caprine (secondary-SEC and early antral-EANT) follicles, after vitrification in the presence of synthetic polymers and in vitro culture. Additionally, transzonal projections (TZPs) and p450 aromatase enzyme were evaluated. After isolation, SEC and EANT follicles were in vitro cultured for six days or vitrified. After one week, SEC and EANT follicles were warmed and also in vitro cultured for six days. Data revealed that the percentage of morphologically normal follicles was similar between fresh and vitrified follicles in both follicular categories and antrum formation rate was similar between fresh and vitrified SEC follicles. Fluorescence by calcein-AM did not show difference between fresh and vitrified (SEC and EANT) follicles, however, the trypan blue test showed low viability for vitrified follicles. The integrity of TZPs was not affected between fresh and vitrified SEC follicles, however, in vitrified EANT follicles, there were signs of TZPs loss. Regarding steroidogenic function, it was observed a positive staining for p450 aromatase enzyme in fresh and vitrified SEC and EANT follicles. It was concluded that SEC follicles seem to be more resistant to vitrification than EANT follicles, as shown by the trypan blue test and TZPs assay. Future studies may confirm this hypothesis, in order to consolidate the use of SEC and EANT follicles as an alternative to ovary cryopreservation.
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Affiliation(s)
- Everton Pimentel Ferreira Lopes
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, CE, Brazil
| | - Giovanna Quintino Rodrigues
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, CE, Brazil
| | - Danielle Cristina Calado de Brito
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, CE, Brazil
| | | | - Anna Clara Accioly Ferreira
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, CE, Brazil
| | - Naíza Arcângela Ribeiro de Sá
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, CE, Brazil
| | - Renato Félix da Silva
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, CE, Brazil
| | - Gabriel Las Heras de Alcântara
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, CE, Brazil
| | | | - José Ricardo de Figueiredo
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, CE, Brazil
| | - Mary Zelinski
- Division of Reproductive and Developmental Sciences, Oregon National Primate Research Center, Beaverton, OR, USA
| | - Ana Paula Ribeiro Rodrigues
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, CE, Brazil.
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Paulino LRFM, Barroso PAA, Silva AWB, Souza ALP, Bezerra FTG, Silva BR, Donato MMA, Peixoto CA, Silva JRV. Effects of epidermal growth factor and progesterone on development, ultrastructure and gene expression of bovine secondary follicles cultured in vitro. Theriogenology 2019; 142:284-290. [PMID: 31711701 DOI: 10.1016/j.theriogenology.2019.10.031] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 10/02/2019] [Accepted: 10/28/2019] [Indexed: 02/06/2023]
Abstract
The aims of this study were to investigate the effects of epidermal growth factor (EGF) and progesterone on the development, viability and the gene expression of bovine secondary follicle culture in vitro for 18 days. Secondary follicles (∼0.2 mm) were isolated from ovarian cortex and individually cultured at 38.5 °C, with 5% CO2 in air, for 18 days, in TCM-199+ (n = 63) alone (control medium) or supplemented with 10 ng/mL progesterone (n = 64), 10 ng/mL EGF (n = 61) or both EGF and progesterone (n = 66). The effects of these treatments on growth, antrum formation, viability, ultrastructure and mRNA levels for GDF-9, c-MOS, H1foo and cyclin B1 were evaluated, significantly different (p < 0.05). The results showed that there was a progressive increase in follicular diameter in all treatments, but only follicles cultured in medium supplemented with EGF had increased significantly in diameter when compared to follicles cultured in the control medium at the end of the culture period, significantly different (p < 0.05). A positive interaction between EGF and progesterone was not observed. In addition, the presence of EGF, progesterone or both in culture medium did not influence the rate of follicle survival and antrum formation. However, the presence of only progesterone in cultured medium increased the expression of mRNAs for GDF9 and cyclin B1 in oocytes. EGF also significantly increased the levels of mRNAs for cMOS and GDF9 when compared to follicles cultured in control medium. Ultrastructural analyzes showed that cultured follicles in all treatments maintained the integrity of granulosa cells. In conclusion, the EGF promotes the development of secondary follicles cultured in vitro for 18 days and increases the expression of cMOS and GDF9, while progesterone alone or in association with EGF have not a positive effect on follicular growth. However, progesterone increases the expression of GDF9 and cyclin B1 in oocytes.
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Affiliation(s)
- L R F M Paulino
- Laboratory of Biotechnology and Physiology of Reproductive, LABREP, Nucleus of Biotechnology of Sobral, NUBIS, Federal University of Ceara, Sobral, CE, Brazil
| | - P A A Barroso
- Laboratory of Biotechnology and Physiology of Reproductive, LABREP, Nucleus of Biotechnology of Sobral, NUBIS, Federal University of Ceara, Sobral, CE, Brazil
| | - A W B Silva
- Laboratory of Biotechnology and Physiology of Reproductive, LABREP, Nucleus of Biotechnology of Sobral, NUBIS, Federal University of Ceara, Sobral, CE, Brazil
| | - A L P Souza
- Laboratory of Biotechnology and Physiology of Reproductive, LABREP, Nucleus of Biotechnology of Sobral, NUBIS, Federal University of Ceara, Sobral, CE, Brazil
| | - F T G Bezerra
- Laboratory of Biotechnology and Physiology of Reproductive, LABREP, Nucleus of Biotechnology of Sobral, NUBIS, Federal University of Ceara, Sobral, CE, Brazil
| | - B R Silva
- Laboratory of Biotechnology and Physiology of Reproductive, LABREP, Nucleus of Biotechnology of Sobral, NUBIS, Federal University of Ceara, Sobral, CE, Brazil
| | - M M A Donato
- Laboratory of Biotechnology and Physiology of Reproductive, LABREP, Nucleus of Biotechnology of Sobral, NUBIS, Federal University of Ceara, Sobral, CE, Brazil
| | - C A Peixoto
- Laboratory of Biotechnology and Physiology of Reproductive, LABREP, Nucleus of Biotechnology of Sobral, NUBIS, Federal University of Ceara, Sobral, CE, Brazil
| | - J R V Silva
- Laboratory of Biotechnology and Physiology of Reproductive, LABREP, Nucleus of Biotechnology of Sobral, NUBIS, Federal University of Ceara, Sobral, CE, Brazil.
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Establishment of a protocol for the isolation of ovarian preantral follicles derived from collared peccaries ( Pecari tajacu). ZYGOTE 2019; 27:315-320. [PMID: 31412974 DOI: 10.1017/s0967199419000315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We compare the efficiency of mechanical or enzymatic methods, and their combination, for the isolation of ovarian preantral follicles (PFs) from collared peccaries. The ovaries from six females were subjected to the different methods investigated here. For the enzymatic method, ovary fragments were exposed to collagenase type IV in TCM-HEPES medium; the mechanical procedure was based on ovarian cortex dissociation by using a scalpel blade. The residual solution obtained after the mechanical isolation was subjected to the enzymatic procedure. The number of isolated PFs was quantified and classified as primordial, primary, or secondary; their viability was assessed using trypan blue dye assay. To confirm the results, PFs derived from the most efficient method were evaluated for integrity using scanning electron microscopy (SEM) and subjected to a 24 h in vitro culture for subsequent evaluation of viability by using fluorescent probes. A higher number of PFs (P < 0.05) was obtained from the enzymatic method (961.7 ± 132.9) in comparison with the mechanical method (434.3 ± 88.9), but no difference was observed between the two methods and their combination (743.2 ± 92.8). The trypan blue assay showed that the enzymatic method (98.7 ± 0.6%) provided the highest percentage of viable follicles (P < 0.05). Furthermore, SEM confirmed the ultrastructural integrity of the surface architecture of peccary PFs isolated by the enzymatic procedure; epifluorescence microscopy was used to confirm their viability (86.0%). In conclusion, we suggest that the enzymatic method investigated here is useful for the isolation of viable ovarian PFs from collared peccaries.
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7
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Barberino RS, Silva JRV, Figueiredo JR, Matos MHT. Transport of Domestic and Wild Animal Ovaries: A Review of the Effects of Medium, Temperature, and Periods of Storage on Follicular Viability. Biopreserv Biobank 2019; 17:84-90. [DOI: 10.1089/bio.2018.0057] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Affiliation(s)
- Ricássio S. Barberino
- Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of São Francisco Valley, Petrolina, Brazil
| | | | - José Ricardo Figueiredo
- Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), Faculty of Veterinary, State University of Ceará, Fortaleza, Brazil
| | - Maria Helena T. Matos
- Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of São Francisco Valley, Petrolina, Brazil
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8
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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 2018; 30:459-468. [PMID: 28784201 DOI: 10.1071/rd17051] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Accepted: 07/12/2017] [Indexed: 11/23/2022] Open
Abstract
The aim of the present study was to evaluate the development of fresh and vitrified agouti ovarian tissue after xenografting to C57Bl/6 severe combined immunodeficiency (SCID) female mice. Ovaries were obtained from five female agoutis and divided into 16 fragments. Five fragments were transplanted immediately to ovariectomised SCID mice and the others were vitrified, stored for 2 weeks and transplanted only after rewarming. Tissue fragments were transplanted under the kidney capsule in recipients. The return of ovarian activity in recipients was monitored by the observation of external signs of oestrus and vaginal cytology over a period of 40 days after transplantation, after which the grafts were removed and evaluated for morphology, cell proliferation and the occurrence of DNA fragmentation. Ovarian activity returned in four of five mice that received fresh ovarian tissue from agoutis and in one of six mice that had received vitrified tissue a mean (±s.e.m.) 20.6±8.6 days after xenotransplantation. After graft removal, a predominance of primordial and primary follicles was observed in all grafts. Vitrification reduced cell proliferation and increased the occurrence of DNA fragmentation in grafted agouti ovarian tissue. In conclusion, the present study demonstrates that xenografted agouti ovarian tissue, fresh or vitrified, is able to promote the return of ovarian activity in ovariectomised SCID C57B1/6 mice. However, improvements to vitrification protocols for agouti ovarian tissue are necessary.
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Affiliation(s)
- Érica C G Praxedes
- Laboratory of Animal Germplasm Conservation, Universidade Federal Rural do Semi-Árido, BR 110, Km 47, Costa e Silva, 59625-900, Mossoró, RN, Brazil
| | - Gabriela L Lima
- Department of Animal Sciences, Instituto Federal de Educação, Ciência e Tecnologia do Ceará (IFCE), CE-292, KM 15, Gisélia Pinheiro, 63115-500, Crato-CE, Brazil
| | - Luana G P Bezerra
- Laboratory of Animal Germplasm Conservation, Universidade Federal Rural do Semi-Árido, BR 110, Km 47, Costa e Silva, 59625-900, Mossoró, RN, Brazil
| | - Fernanda A Santos
- Laboratory of Gonadal Transplantation and Embryo Production, Universidade Federal Rural do Semi-Árido, BR 110, Km 47, Costa e Silva, 59625-900, Mossoró, RN, Brazil
| | - Marcelo B Bezerra
- Laboratory of Gonadal Transplantation and Embryo Production, Universidade Federal Rural do Semi-Árido, BR 110, Km 47, Costa e Silva, 59625-900, Mossoró, RN, Brazil
| | - Denise D Guerreiro
- Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), Faculdade de Veterinária, Universidade do Ceará, Av. Paranjana 1700, Campus do Itaperi, 60714-903, Fortaleza, CE, Brazil
| | - Ana P R Rodrigues
- Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), Faculdade de Veterinária, Universidade do Ceará, Av. Paranjana 1700, Campus do Itaperi, 60714-903, Fortaleza, CE, Brazil
| | - Sheyla F S Domingues
- Laboratory of Amazon Wild Animals Biology and Medicine, Universidade Federal do Pará, Jaderlândia, 68746-360,Castanhal, PA, Brazil
| | - Alexandre R Silva
- Laboratory of Animal Germplasm Conservation, Universidade Federal Rural do Semi-Árido, BR 110, Km 47, Costa e Silva, 59625-900, Mossoró, RN, Brazil
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Piras AR, Burrai GP, Ariu F, Falchi L, Zedda MT, Pau S, Gadau SD, Antuofermo E, Bebbere D, Ledda S, Bogliolo L. Structure of preantral follicles, oxidative status and developmental competence of in vitro matured oocytes after ovary storage at 4 °C in the domestic cat model. Reprod Biol Endocrinol 2018; 16:76. [PMID: 30097048 PMCID: PMC6087010 DOI: 10.1186/s12958-018-0395-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 08/02/2018] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Storage conditions during transportation of explanted ovaries are a critical step in setting up fertility preservation protocols in both animal and human fields. Here, we evaluated the effects of ovary storage at 4 °C on the preservation of preantral follicles and oocytes retrieved from antral follicles using the domestic cat as model. METHODS Ovaries were harvested from fifty-five healthy domestic queens during ovariectomy and stored at 4 °C for 0 (control), 24, 48, 72 and 96 h. In Experiment 1, the effects of the storage period at 4 °C on the morphology, cytoskeleton (α/β tubulin) and DNA integrity (phosphorylation of histone H2AX) of preantral follicles were investigated. In Experiment 2, oocytes recovered from antral follicles were matured and fertilized in vitro to evaluate their meiotic and developmental competence. Reactive oxygen species (ROS), glutathione (GSH) and lipid peroxidation were measured in matured oocytes. RESULTS The results showed that: a) storage up to 24 h did not affect the morphology and the DNA integrity of preantral follicles; b) extended storage times caused progressive morphological abnormalities, disassembling of microtubules and DNA damage; c) storage up to 48 h did not influence in vitro meiotic maturation of oocytes nor cleavage after in vitro fertilization. However, only oocytes stored within the ovary for 24 h produced blastocysts in a percentage similar to control oocytes; d) GSH levels of in vitro matured oocytes did not change at any time during ovary storage; a progressive increase in ROS levels was detected from 48 h associated with elevated lipid peroxidation at 72 and 96 h of storage. CONCLUSIONS Storage of cat ovaries for up to 24 h caused minimal alteration of preantral follicles and oocytes. The extension of the storage period beyond 24 h progressively impaired the structure of follicles, and modified the oxidative status of in vitro matured oocytes and their developmental competence after in vitro fertilization. This information may help when setting up programs for fertility conservation, especially for wild feline species which die in geographic areas located far away from ARTs centers.
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Affiliation(s)
- Anna Rita Piras
- 0000 0001 2097 9138grid.11450.31Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Giovanni Pietro Burrai
- 0000 0001 2097 9138grid.11450.31Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Federica Ariu
- 0000 0001 2097 9138grid.11450.31Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Laura Falchi
- 0000 0001 2097 9138grid.11450.31Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Maria Teresa Zedda
- 0000 0001 2097 9138grid.11450.31Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Salvatore Pau
- 0000 0001 2097 9138grid.11450.31Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Sergio Domenico Gadau
- 0000 0001 2097 9138grid.11450.31Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Elisabetta Antuofermo
- 0000 0001 2097 9138grid.11450.31Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Daniela Bebbere
- 0000 0001 2097 9138grid.11450.31Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Sergio Ledda
- 0000 0001 2097 9138grid.11450.31Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Luisa Bogliolo
- 0000 0001 2097 9138grid.11450.31Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
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10
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Cryopreservation and characterization of canine preantral follicles. Cryobiology 2018; 81:34-42. [DOI: 10.1016/j.cryobiol.2018.02.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 02/06/2018] [Accepted: 02/22/2018] [Indexed: 11/22/2022]
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11
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Santos EA, Lima GL, Praxedes EC, Silva AM, Maia KM, Oliveira MF, Rodrigues APR, Silva AR. Estimation, morphometry and ultrastructure of ovarian preantral follicle population in agouti (Dasyprocta leporina). PESQUISA VETERINARIA BRASILEIRA 2018. [DOI: 10.1590/1678-5150-pvb-4946] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
ABSTRACT: The aim of this study was to characterize the preantral ovarian follicular population in agoutis (D. leporina) by estimating the number of follicles at each developmental category, and also describe the morphometry and the specific features of the follicle and the oocyte by using light and transmission electron microscopy. The length of each ovary was measured using a caliper rule, longitudinally sectioned into two halves and both were immediately fixed to perform the estimation of follicular population and ultrastructural analysis. The mean (±S.E.M.) population of follicular per pair of ovary was estimated at 4419.8±532.26 and 5397.52±574.91 for right and left ovaries, respectively, but no differences were observed between them. The diameters for follicles, oocyte and nuclei were: 18.62±3.40μm, 12.28±2.37μm and 6.10±0.93μm for primordial, 23.75±5.70μm, 14.22±3.00μm and 6.70±1.24μm for primary and 88.55±17.61μm, 52.85±17.56μm and 22.33±17.61μm for secondary follicles, respectively. The most of the follicles found belonged to the primordial category (86.63%), followed by primary (13.01%) and secondary (0.35%) one. Additionally, polyovular follicles were observed in all the animals and they represented 7.51% of the total follicles counted. The ultrastructural analysis showed that the oocyte presented a central and regular nuclei, displaying a homogenous mass. Among the organelles, the mitochondria were the most abundant and the oocyte Golgi apparatus was rarely observed. In conclusion, this work shows for the first time the characterization of the population of preantral follicles in the ovary of Dasyprocta leporina. Those information will be useful for further development and adaptation of biotechniques such as germplasm cryopreservation and in vitro gametes manipulation.
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Gastal GDA, Alves BG, Alves KA, Souza MEM, Vieira AD, Varela AS, Figueiredo JR, Feugang JM, Lucia T, Gastal EL. Ovarian fragment sizes affect viability and morphology of preantral follicles during storage at 4°C. Reproduction 2017; 153:577-587. [PMID: 28246309 DOI: 10.1530/rep-16-0621] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 02/15/2017] [Accepted: 02/28/2017] [Indexed: 01/06/2023]
Abstract
The method of transportation and the conditions imposed on the ovarian tissue are pivotal aspects for the success of ovarian tissue cryopreservation (OTC). The aim of this study was to evaluate the effect of the size of the ovarian tissue (e.g. whole ovary, biopsy size and transplant size) during different times of storage (0, 6, 12 and 24 h) on the structural integrity of equine ovarian tissue transported at 4°C. Eighteen pairs of ovaries from young mares (<10 years old) were harvested in a slaughterhouse and processed to simulate the fragment sizes (biopsy and transplant size groups) or kept intact (whole ovary group) and stored at 4°C for up to 24 h in α-MEM-enriched solution. The effect of the size of the ovarian tissue was observed on the morphology of preantral follicles, stromal cell density, DNA fragmentation and mitochondrial membrane potential. The results showed that (i) biopsy size fragments had more morphologically normal preantral follicles after 24 h of storage at 4°C; (ii) mitochondrial membrane potential was the lowest during each storage time when the whole ovary was used; (iii) DNA fragmentation rate in the ovarian cells of all sizes of fragments increased as storage was prolonged and (iv) transplant size fragments had increased stromal cell density during storage at cool temperature. In conclusion, the biopsy size fragment was the best to preserve follicle morphology for long storage (24 h); however, transportation/storage should be prior determined according to the distance (time of transportation) between patient and reproduction centers/clinics.
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Affiliation(s)
- G D A Gastal
- Department of Animal ScienceFood and Nutrition, Southern Illinois University, Carbondale, Illinois, USA
| | - B G Alves
- Department of Animal ScienceFood and Nutrition, Southern Illinois University, Carbondale, Illinois, USA
| | - K A Alves
- Department of Animal ScienceFood and Nutrition, Southern Illinois University, Carbondale, Illinois, USA
| | - M E M Souza
- Department of Animal ScienceFood and Nutrition, Southern Illinois University, Carbondale, Illinois, USA
| | - A D Vieira
- Laboratory of Animal ReproductionFaculty of Veterinary Medicine
| | - A S Varela
- Institute of Biological SciencesFederal University of Pelotas, Capão do Leão, Rio Grande do Sul, Brazil
| | - J R Figueiredo
- Laboratory of Manipulation of Oocytes and Preantral FolliclesFaculty of Veterinary Medicine, State University of Ceara, Fortaleza, Ceará, Brazil
| | - J M Feugang
- Department of Animal and Dairy SciencesMississippi State University, Mississippi State, Mississippi, USA
| | - T Lucia
- Laboratory of Animal ReproductionFaculty of Veterinary Medicine
| | - E L Gastal
- Department of Animal ScienceFood and Nutrition, Southern Illinois University, Carbondale, Illinois, USA
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13
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Lopes CAP, Alves AMCV, Jewgenow K, Báo SN, de Figueiredo JR. Cryopreservation of canine ovarian cortex using DMSO or 1,3-propanediol. Theriogenology 2016; 86:1165-74. [DOI: 10.1016/j.theriogenology.2016.04.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Accepted: 04/05/2016] [Indexed: 10/21/2022]
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14
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Duncan FE, Zelinski M, Gunn AH, Pahnke JE, O'Neill CL, Songsasen N, Woodruff RI, Woodruff TK. Ovarian tissue transport to expand access to fertility preservation: from animals to clinical practice. Reproduction 2016; 152:R201-R210. [PMID: 27492079 DOI: 10.1530/rep-15-0598] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 08/04/2016] [Indexed: 12/13/2022]
Abstract
Primordial follicles dictate a female's reproductive life span and therefore are central to fertility preservation for both endangered species and individuals with fertility-threatening conditions. Ovarian tissue containing primordial follicles can be cryopreserved and later thawed and transplanted back into individuals to restore both endocrine function and fertility. Importantly, increasing numbers of human live births have been reported following ovarian tissue cryopreservation and transplantation. A current limitation of this technology is patient access to sites that are approved or equipped to process and cryopreserve ovarian tissue - especially in larger countries or low resource settings. Here, we review empirical evidence from both animal models and human studies that suggest that ovarian tissue can be transported at cold temperatures for several hours while still maintaining the integrity and reproductive potential of the primordial follicles within the tissue. In fact, several human live births have been reported in European countries using tissue that was transported at cold temperatures for up to 20 h before cryopreservation and transplantation. Ovarian tissue transport, if implemented widely in clinical practice, could therefore expand both patient and provider access to emerging fertility preservation options.
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Affiliation(s)
- Francesca E Duncan
- Department of Obstetrics and GynecologyFeinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Mary Zelinski
- Oregon National Primate Research CenterBeaverton, Oregon, USA
| | - Alexander H Gunn
- Department of Obstetrics and GynecologyFeinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Jennifer E Pahnke
- Department of Obstetrics and GynecologyFeinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Conor L O'Neill
- Department of Obstetrics and GynecologyFeinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | | | - Ryan I Woodruff
- Department of Obstetrics and GynecologyFeinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Teresa K Woodruff
- Department of Obstetrics and GynecologyFeinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
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15
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Jimenez CR, Araújo VR, Penitente-Filho JM, de Azevedo JL, Silveira RG, Torres CAA. The base medium affects ultrastructure and survival of bovine preantral follicles cultured in vitro. Theriogenology 2015; 85:1019-29. [PMID: 26711701 DOI: 10.1016/j.theriogenology.2015.11.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 11/04/2015] [Accepted: 11/07/2015] [Indexed: 10/22/2022]
Abstract
The aim of this study was to determine the effectiveness of minimum essential medium alpha modification (α-MEM), tissue culture medium 199 (TCM-199), and McCoy's medium (McCoy's) on IVC of preantral follicles included in the bovine ovarian cortex (in situ). Bovine ovarian fragments were cultured in α-MEM, TCM-199, or McCoy supplemented ((+)) with glutamine, insulin, transferrin, selenium, ascorbic acid, BSA, penicillin, streptomycin, and HEPES buffer in 24-well plates, at 37 °C and 5% CO2 for 1 or 7 days. The morphology of follicles, normal, primordial and development (primary and secondary), as well as viability and morphometric variables of follicles and oocytes were assessed. The morphology and morphometry of preantral follicles were analyzed by ANOVA followed by the Tukey and Dunnett tests, and viability variables were determined by the chi-square test. The results showed that TCM-199(+) reduced significantly (P < 0.05) the percentage of morphologically normal and viable follicles after 7 days of culture compared to the control. Similar results were observed in McCoy(+), in which the percentage of viable follicles after 7 days of culture was significantly lower (P < 0.05) than in the control. However, it was similar (P > 0.05) between α-MEM(+) and TCM-199(+). Moreover, follicular diameters in McCoy(+) and TCM-199(+) were significantly smaller (P < 0.05) than in control and α-MEM(+) after 7 days of culture. In addition, the ultrastructure of preantral follicles was similar between the control and α-MEM(+) after 7 days of culture. In conclusion, α-MEM(+) showed to be the most effective medium to preserve morphology, morphometry and ultrastructure of bovine preantral follicles, ensuring their viability and growth after in situ culture.
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Affiliation(s)
- Carolina Rodriguez Jimenez
- Laboratory of Physiology and Animal Reproduction, Department of Animal Science, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil.
| | - Valdevane Rocha Araújo
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, Ceará, Brazil
| | - Jurandy Mauro Penitente-Filho
- Laboratory of Physiology and Animal Reproduction, Department of Animal Science, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil
| | - Jovana Luiza de Azevedo
- Laboratory of Physiology and Animal Reproduction, Department of Animal Science, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil
| | - Renata Gomes Silveira
- Laboratory of Physiology and Animal Reproduction, Department of Animal Science, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil
| | - Ciro Alexandre Alves Torres
- Laboratory of Physiology and Animal Reproduction, Department of Animal Science, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil
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16
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Serafim MKB, Duarte ABG, Silva GM, Souza CEA, Magalhães-Padilha DM, Moura AAA, Silva LDM, Campello CC, Figueiredo JR. Impact of growth hormone (GH) and follicle stimulating hormone (FSH) on in vitro canine preantral follicle development and estradiol production. Growth Horm IGF Res 2015; 25:85-89. [PMID: 25604894 DOI: 10.1016/j.ghir.2014.12.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Revised: 12/29/2014] [Accepted: 12/30/2014] [Indexed: 11/20/2022]
Abstract
OBJECTIVE Evaluate the effect of different concentrations of growth hormone (GH) on the in vitro development of domestic dog (Canis lupus familiaris) preantral follicles in the presence or absence of follicle stimulating hormone (FSH). METHODS Secondary preantral follicles, isolated by microdissection, were cultured in a medium composed of αMEM with bovine serum albumin (BSA), glutamine, hypoxanthine, insulin, transferrin, selenium and ascorbic acid (αMEM(+)-control) added at different concentrations of GH (GH10 ng/ml or GH50 ng/ml) and FSH (GH10+FSH, GH50+FSH). Follicle development was evaluated based on the percentage of intact follicles, antrum formation, follicular diameter, follicular viability using fluorescent markers and estradiol production. RESULTS GH50 was the only treatment that maintained the same percentage of normal morphologically follicles from day 0 to day 18 of culture (P<0.05). For all treatments, except the control, follicles were viable throughout the 18 days of culture (P<0.05). GH50 supplemented with FSH (GH50+FSH) resulted in the highest average follicular diameter (P<0.05) from day 12 to 18. Follicles from both the control and the GH50+FSH treatment groups actively and increasingly secreted estradiol from day 6 to 18 of culture (P<0.05). CONCLUSIONS Our study demonstrates that GH benefits the maintenance of follicular morphology in a dose-dependent manner and, in association with FSH, stimulates in vitro follicular growth and estradiol production.
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Affiliation(s)
- M K B Serafim
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), Veterinary Science Post Graduation Program (VSPGP), State University of Ceara, Av. Paranjana, 1700, Campus do Itaperi, Fortaleza, CE 60740-000, Brazil
| | - A B G Duarte
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), Veterinary Science Post Graduation Program (VSPGP), State University of Ceara, Av. Paranjana, 1700, Campus do Itaperi, Fortaleza, CE 60740-000, Brazil
| | - G M Silva
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), Veterinary Science Post Graduation Program (VSPGP), State University of Ceara, Av. Paranjana, 1700, Campus do Itaperi, Fortaleza, CE 60740-000, Brazil
| | - C E A Souza
- Laboratory of Animal Physiology, Department of Animal Science, Federal University of Ceara, Av. Mister Hull S/N, Campus Pici, Fortaleza, CE CEP: 60021-970, Brazil
| | - D M Magalhães-Padilha
- Potiguar University, Laureate International Universities, Av. Senador Salgado Filho, 1610, Lagoa Nova, Natal, RN CEP: 59056-000, Brazil.
| | - A A A Moura
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), Veterinary Science Post Graduation Program (VSPGP), State University of Ceara, Av. Paranjana, 1700, Campus do Itaperi, Fortaleza, CE 60740-000, Brazil
| | - L D M Silva
- Faculty of Veterinary Medicine, Laboratory of Carnivore Reproduction (LRC), State University of Ceara, Av. Paranjana, 1700, Campus do Itaperi, Fortaleza, CE CEP: 60740-000, Brazil
| | - C C Campello
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), Veterinary Science Post Graduation Program (VSPGP), State University of Ceara, Av. Paranjana, 1700, Campus do Itaperi, Fortaleza, CE 60740-000, Brazil
| | - J R Figueiredo
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), Veterinary Science Post Graduation Program (VSPGP), State University of Ceara, Av. Paranjana, 1700, Campus do Itaperi, Fortaleza, CE 60740-000, Brazil
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17
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Lima G, Santos E, Lima L, Luz V, Rodrigues A, Silva A. Short-term preservation of Pecari tajacu ovarian preantral follicles using phosphate buffered saline (PBS) or powdered coconut water (ACP(r)) media. ARQ BRAS MED VET ZOO 2014. [DOI: 10.1590/1678-7297] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We compare protocols for the short-term preservation of collared peccarie's ovarian preantral follicles (PFs) by using phosphate buffered saline- (PBS) or powdered coconut water- (ACP(r)) based medium. For morphology analysis each pair of ovaries collected from six females was divided into nine fragments. One fragment was destined for morphology analysis (histology and transmission electron microscopy - TEM), constituting the control group and the other fragments were placed in tubes with PBS or ACP(r), packed in 5 L Styrofoam boxes, stored for 4h, 12h, 24h, and 36h, and then analyzed. For viability analysis a pair of ovaries from two additional females was divided into nine fragments; one fragment was immediately destined for viability analysis (Trypan blue test) and the other fragments were stored as previously described, until 24h and then analyzed. After 4h storage in ACP(r) medium, the follicular integrity was similar to control (87.8% vs 94.4%, respectively); however, ultrastructural analyses revealed swollen mitochondria as the first signals of PF degeneration. It was observed that ACP(r) (66.7%) was more efficient than PBS (49.4%) to preserve the morphological integrity after 36h storage (P<0.05); however, no differences were observed on follicular viability (P>0.05). In conclusion, the use of the ACP(r) is recommended for the short-term preservation of Pecari tajacupreantral follicles.
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Affiliation(s)
- G.L. Lima
- Universidade Federal Rural do Semi-Árido - UFERSA
| | | | | | - V.B. Luz
- Universidade Federal Rural do Semi-Árido - UFERSA
| | | | - A.R. Silva
- Universidade Federal Rural do Semi-Árido - UFERSA
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18
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Nóbrega Jr. J, Rossetto R, Matos M, Chaves R, Magalhães D, Lima-Verde I, Báo S, Campello C, Figueiredo J, Gonçalves P, Oliveira J. Sphingosine 1-phosphate promotes activation of aprine preantral follicle in vitro. ARQ BRAS MED VET ZOO 2014. [DOI: 10.1590/1678-6455] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
This study describes the effect of sphingosine 1-phosphate (S1P) for development of preantral follicle, therefore the activation and follicular viability of caprine follicles cultured in vitro. Ovarian fragments were cultured for 1 or 7 days in Minimum Essential Medium with different S1P concentrations (0, 1, 10, 50, 100 or 200ng/mL). All ovarian fragments were processed for histological analysis in optical microscopy, transmission electron microscopy and fluorescence analysis. The treatment using 1ng/mL of S1P was able to maintain the percentage of normal follicles with the progression of the culture from day 1 to 7. At end of the 7-day culture period there was a significant reduction (P<0.05) in the percentage of primordial follicles in all groups treated with S1P, compared with fresh control (FC) and Control Culture (CC), which was followed by an increase of activated follicles (intermediary, primary and secondary). In addition, the culture for 7 days with media supplemented with S1P with 1ng/mL preserved the ultrastructure of organelles and kept the preantral follicular viability when evaluated by fluorescence microscopy. In conclusion, after 7 days of culture, the 1ng/mL of S1P activates the development of preantral caprine follicles, cultured in situ and maintains the oocitary and follicular viability.
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Affiliation(s)
| | | | | | | | | | | | - S.N. Báo
- Universidade de Brasília, Brasil
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19
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Carvalho A, Faustino L, Silva C, Castro S, Lobo C, Santos F, Santos R, Campello C, Bordignon V, Figueiredo J, Rodrigues A. Catalase addition to vitrification solutions maintains goat ovarian preantral follicles stability. Res Vet Sci 2014; 97:140-7. [DOI: 10.1016/j.rvsc.2014.05.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 03/01/2014] [Accepted: 05/16/2014] [Indexed: 11/26/2022]
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20
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Serafim MKB, Silva GM, Duarte ABG, Araújo VR, Silva TFP, Lima AKF, Chaves RN, Campello CC, Silva LDM, Figueiredo JR. High insulin concentrations promote the in vitro growth and viability of canine preantral follicles. Reprod Fertil Dev 2014; 25:927-34. [PMID: 22953726 DOI: 10.1071/rd12074] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2012] [Accepted: 08/04/2012] [Indexed: 11/23/2022] Open
Abstract
To determine whether the effects of different concentrations of insulin on the development of canine preantral follicles in vitro were associated or not with FSH, secondary follicles were isolated and cultured. In Experiment 1, follicles were cultured in the following media: modified minimum essential medium (CtrlMEM) alone; CtrlMEM plus 5 ng mL⁻¹ insulin (Ins5ng); CtrlMEM plus 10 ng mL⁻¹ insulin (Ins10ng); and CtrlMEM plus 10 μg mL⁻¹ insulin. In Experiment 2, follicles were cultured in the same media but in the presence of sequential FSH (i.e. CtrlFSH, Ins5ngF, Ins10ngF and 10μgF, respectively). Increasing concentrations of FSH (100, 500 and 1000 ng mL⁻¹) were added sequentially to the culture medium on Days 0, 6 and 12 of culture. Viability were assessed at the end of culture and follicular diameter and the antrum formation rate at four time points (Days 0, 6, 12 and 18). In Experiment 1, the high insulin concentration significantly increased follicular viability (P<0.05). In contrast, in Experiment 2, viability was not affected by the inclusion of insulin. In addition, viability was significantly better in follicles cultured in CtrlFSH (P<0.05). The diameter of follicles in the high-insulin group in Experiment 1 and high-insulin plus FSH group in Experiment 2 was superior to other groups tested. In experiment 2, the Ins10μg and Ins10μgF groups exhibited significantly higher antrum formation rates than the other groups. In conclusion, in the absence of FSH, high concentrations of insulin have beneficial effects on follicular viability. However, to promote the growth of canine preantral follicles in vitro, it is recommended that a combination of insulin and FSH be added to the medium.
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Affiliation(s)
- Michelle K B Serafim
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocytes and Preantral Follicles LAMOFOPA, Veterinary Science Post Graduation Program VSPGP, State University of Ceara, Av. Paranjana, 1700, Campus do Itaperi, Fortaleza, CE 60.740-000, Brazil
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21
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Lima LFD, Rocha RMP, Alves AMCV, Saraiva MVA, Araújo VR, Lima IMT, Lopes CAP, Báo SN, Campello CC, Rodrigues APR, Figueiredo JRD. Dynamized follicle-stimulating hormone affects the development of ovine preantral follicles cultured in vitro. HOMEOPATHY 2013; 102:41-8. [PMID: 23290878 DOI: 10.1016/j.homp.2012.11.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Revised: 10/25/2012] [Accepted: 11/12/2012] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To evaluate the effect of dynamized follicle-stimulating hormone (FSH) on the survival, activation and growth of ovine preantral follicles (PFs) in vitro. METHODS Ovarian fragments were cultured for 1 or 7 days in alpha minimum essential medium (α-MEM(+)) control in the absence or presence of alcohol (Al control) or FSH (6cH, 12cH and 30cH) added at intervals of 24 or 48 h. The ovarian fragments were processed, coded and analyzed by a blinded observer by classical histology (CH), fluorescence microscopy (FM) and transmission electron microscopy (TEM). RESULTS After 7 days of culture, the group which to which FSH 6cH was added at 24 h intervals showed better rates of follicle survival and activation compared to α-MEM(+) control or Al control (p < 0.05). This group also showed higher follicle and oocyte growth than α-MEM(+) control (p < 0.05). FM and TEM techniques confirmed that FSH 6cH promoted viability and ultrastructural integrity of follicles after 7 days of culture. CONCLUSIONS FSH 6cH (24 h) treatment maintained the viability, and promoted the activation and in vitro growth of ovine PFs.
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Affiliation(s)
- Laritza Ferreira de Lima
- Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza-CE, Brazil.
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22
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Rocha RMP, Lima LF, Alves AMCV, Celestino JJH, Matos MHT, Lima-Verde IB, Bernuci MP, Lopes CAP, Báo SN, Campello CC, Rodrigues APR, Figueiredo JR. Interaction between melatonin and follicle-stimulating hormone promotes in vitro development of caprine preantral follicles. Domest Anim Endocrinol 2013; 44:1-9. [PMID: 22920266 DOI: 10.1016/j.domaniend.2012.07.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Revised: 07/18/2012] [Accepted: 07/22/2012] [Indexed: 10/28/2022]
Abstract
The aim of this study was to investigate the effects of melatonin and follicle-stimulating hormone (FSH) on the in vitro culture of goat preantral follicles. Ovarian fragments were cultured for 7 d in α-minimum essential medium (α-MEM(+)) containing melatonin (100, 250, 500, or 1,000 pM), FSH (50 ng/mL), or a combination of the 2 hormones and further analyzed by histology and transmission electron and fluorescent microscopy. The results showed that after 7 d of culture, tissues cultured in α-MEM(+) alone or supplemented with FSH alone, melatonin (500 and 1,000 pM), or the combination of FSH and melatonin (1,000 pM) maintained percentages of normal preantral follicles similar to the fresh control. In contrast to the noncultured tissues, the percentage of developing follicles was increased under all culture conditions after 7 d (P < 0.05). The addition of 1,000 pM melatonin associated with FSH to the culture medium increased follicular and oocyte diameters compared with α-MEM(+) alone after 7 d of culture (P < 0.05). Ultrastructural and fluorescent analyses confirmed the integrity of follicles cultured with 1,000 pM of melatonin plus FSH for 7 d. In conclusion, this study demonstrated that the interaction between melatonin and FSH maintains ultrastructural integrity and stimulates further growth of cultured caprine preantral follicles.
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Affiliation(s)
- R M P Rocha
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocyte and Preantral Follicles, State University of Ceara, 60740-000 Fortaleza CE, Brazil.
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23
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Lima GL, Santos EAA, Luz VB, Rodrigues APR, Silva AR. Morphological Characterization of the Ovarian Preantral Follicle Population of Collared Peccaries (Tayassu tajacuLinnaeus, 1758). Anat Histol Embryol 2012; 42:304-11. [DOI: 10.1111/ahe.12021] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2012] [Accepted: 11/03/2012] [Indexed: 11/30/2022]
Affiliation(s)
- G. L. Lima
- Laboratório de Conservação de Germoplasma Animal; Universidade Federal Rural do Semi-Árido - UFERSA; BR 110, Km 47, Presidente Costa e Silva; 59625-900; Mossoró; RN; Brazil
| | - E. A. A. Santos
- Laboratório de Conservação de Germoplasma Animal; Universidade Federal Rural do Semi-Árido - UFERSA; BR 110, Km 47, Presidente Costa e Silva; 59625-900; Mossoró; RN; Brazil
| | - V. B. Luz
- Laboratório de Manipulação de Oócitos e Folículos Pré Antrais; Universidade Estadual do Ceará; Av. Paranjana; 1700; Itaperi, Fortaleza; CE; Brazil
| | - A. P. R. Rodrigues
- Laboratório de Manipulação de Oócitos e Folículos Pré Antrais; Universidade Estadual do Ceará; Av. Paranjana; 1700; Itaperi, Fortaleza; CE; Brazil
| | - A. R. Silva
- Laboratório de Conservação de Germoplasma Animal; Universidade Federal Rural do Semi-Árido - UFERSA; BR 110, Km 47, Presidente Costa e Silva; 59625-900; Mossoró; RN; Brazil
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Abstract
SummaryOne of the greatest challenges for reproductive cryobiologists today is to develop an efficient cryopreservation method for human and domestic animal oocytes. The objective of the present study was to optimize a low toxicity solution called VM3 to vitrify porcine oocytes using an open pulled straw (OPS) device and to evaluate the effects on viability, chromosomal organization and cortical granules distribution. Two experiments were conducted in this study. Firstly, we determined the minimum concentration of cryoprotectant present in the VM3 solution required (7.6 M) for vitrification using an OPS device. The appearance of opacity was observed when using a cooling solution at –196°C; no observable opacity was noted as vitrification. In addition, the ultrastructure of oocytes in VM3 or VM3 optimized solution was examined using cryo-scanning electron microscopy. The minimum total cryoprotectant concentration present in VM3 solution necessary for apparent vitrification was 5.6 M when combined with use of an OPS device. Use of both vitrification solutions showed a characteristic plasticized surface. In the second experiment, the relative cytotoxicity of vitrification solutions (VM3 and VM3 optimized) was studied. Oocyte viability, chromosomal organization and the cortical granules distribution were assessed by fluorescent stain. After warming, oocyte survival rate was similar to that of fresh oocytes. The vitrification process significantly reduced correct chromosomal organization and cortical granules distribution rates compared with the fresh oocytes group. However, correct chromosomal organization and cortical granules distribution rates did not differ among oocytes placed in different vitrification solutions. In conclusion, our data demonstrated that the VM3 solution can be optimized and that reduction in concentration to 5.6 M enabled vitrification of oocytes with an OPS device, however use of the VM3 optimised solution had no beneficial effect on vitrification of porcine oocytes.
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25
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Effect of holding medium, temperature and time on structural integrity of equine ovarian follicles during the non-breeding season. Theriogenology 2012; 78:731-6. [DOI: 10.1016/j.theriogenology.2012.03.019] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2011] [Revised: 03/08/2012] [Accepted: 03/09/2012] [Indexed: 11/21/2022]
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Luz HK, Santos RR, Wanderley LS, Faustino LR, Silva CM, Carvalho AA, Campello CC, Santos FW, Figueiredo JR, Rodrigues APR. Catalase Prevents Lipid Peroxidation and Enhances Survival of Caprine Preantral Follicles Cryopreserved in a 1,2-Propanediol-Freezing Medium. Biopreserv Biobank 2012; 10:338-42. [DOI: 10.1089/bio.2011.0046] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Hiedely K.M. Luz
- Laboratory of Manipulation of Oocytes and Preantral Follicles: LAMOFOPA, Faculty of Veterinary, State University of Ceará, Fortaleza, Ceará, Brazil
| | - Regiane. R. Santos
- Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
- Laboratory of Biology and Medicine of Wild Mammals from Amazonia, Federal University of Pará, Belém, Pará, Brazil
| | - Livia S. Wanderley
- Laboratory of Manipulation of Oocytes and Preantral Follicles: LAMOFOPA, Faculty of Veterinary, State University of Ceará, Fortaleza, Ceará, Brazil
| | - Luciana R. Faustino
- Laboratory of Manipulation of Oocytes and Preantral Follicles: LAMOFOPA, Faculty of Veterinary, State University of Ceará, Fortaleza, Ceará, Brazil
| | - Cleidson M.G. Silva
- Laboratory of Manipulation of Oocytes and Preantral Follicles: LAMOFOPA, Faculty of Veterinary, State University of Ceará, Fortaleza, Ceará, Brazil
| | - Adeline A. Carvalho
- Laboratory of Manipulation of Oocytes and Preantral Follicles: LAMOFOPA, Faculty of Veterinary, State University of Ceará, Fortaleza, Ceará, Brazil
| | - Claudio C. Campello
- Laboratory of Manipulation of Oocytes and Preantral Follicles: LAMOFOPA, Faculty of Veterinary, State University of Ceará, Fortaleza, Ceará, Brazil
| | | | - José R. Figueiredo
- Laboratory of Manipulation of Oocytes and Preantral Follicles: LAMOFOPA, Faculty of Veterinary, State University of Ceará, Fortaleza, Ceará, Brazil
| | - Ana Paula R. Rodrigues
- Laboratory of Manipulation of Oocytes and Preantral Follicles: LAMOFOPA, Faculty of Veterinary, State University of Ceará, Fortaleza, Ceará, Brazil
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Sanfilippo S, Canis M, Ouchchane L, Botchorishvili R, Artonne C, Janny L, Brugnon F. Viability assessment of fresh and frozen/thawed isolated human follicles: reliability of two methods (Trypan blue and Calcein AM/ethidium homodimer-1). J Assist Reprod Genet 2011; 28:1151-6. [PMID: 22033548 DOI: 10.1007/s10815-011-9649-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Accepted: 10/11/2011] [Indexed: 11/30/2022] Open
Abstract
PURPOSE To assess the reliability of trypan blue (TB) and calcein AM/ethidium homodimer-1 (CaAM/EthD-1) staining to evaluate the viability of fresh and thawed human ovarian follicles. METHODS Isolated follicles from fresh and thawed cortex were stained using TB versus CaAM/EthD-1 methods (n = 10 patients). Measurements were performed by two independent observers. The reliability was evaluated by intraclass correlation coefficient (ICC) and the differences between paired measurements were tested by the Wilcoxon test. RESULTS Inter-observer reliability was excellent for each method. Nevertheless, it was even better with the TB method (ICC = 0.83) compared with CaAM/EthD-1 (ICC = 0.75). Moreover, the ICCs for viability measurements using the two methods were good for each observer (observer 1: ICC = 0.49; observer 2: ICC = 0.40). CONCLUSION Compared with CaAM/EthD-1, TB appears to be more reliable as a staining method for follicle viability evaluation. TB staining is a quick and useful method, complementary to histological analysis for quality control in ovarian tissue cryopreservation.
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Affiliation(s)
- Sandra Sanfilippo
- Laboratoire de biologie du développement et de la reproduction, Université Clermont 1, UFR Médecine, E.A. 975, 28 Place Henri Dunant, 63001, Clermont-Ferrand, Cedex 1, France.
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Gupta PSP, Nandi S. Isolation and culture of preantral follicles for retrieving oocytes for the embryo production: present status in domestic animals. Reprod Domest Anim 2011; 47:513-9. [PMID: 22008238 DOI: 10.1111/j.1439-0531.2011.01904.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
The development of efficient ovarian preantral follicle (PF) isolation and culture systems provide a large number of oocytes for the manipulation and embryo production. It also helps for understanding the mechanisms of follicle and oocyte development. Isolation and culture protocols for PFs were developed for many domestic species like cattle, buffalo, sheep, goat, pig, horse, camel, dog and cats; however, embryo production from oocytes derived from in vitro grown PFs was reported only in pigs, buffalo, sheep and goat. The rate of oocyte maturation from PFs grown in vitro is low and requires considerable research. This paper presents an overview of isolation and culture systems of PFs that have been developed for domestic species (cattle, buffalo, sheep, goat, pigs, horse, camel, dog and cat) along with the current status of progress achieved in the direction of producing embryos using PFs as the source of oocyte in these species.
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Affiliation(s)
- P S P Gupta
- National Institute of Animal Nutrition and Physiology, Bangalore-30, India.
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Carvalho A, Faustino L, Silva C, Castro S, Luz H, Rossetto R, Lopes C, Campello C, Figueiredo J, Rodrigues A, Costa A. Influence of vitrification techniques and solutions on the morphology and survival of preantral follicles after in vitro culture of caprine ovarian tissue. Theriogenology 2011; 76:933-41. [DOI: 10.1016/j.theriogenology.2011.04.024] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2010] [Revised: 04/15/2011] [Accepted: 04/22/2011] [Indexed: 10/17/2022]
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30
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Viability of oocytes and granulosa cells from cryopreserved ovine ovarian primordial, primary and secondary follicles. Small Rumin Res 2011. [DOI: 10.1016/j.smallrumres.2011.03.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Matos M, Bruno J, Rocha R, Lima-Verde I, Santos K, Saraiva M, Silva J, Martins F, Chaves R, Báo S, Figueiredo J. In vitro development of primordial follicles after long-term culture of goat ovarian tissue. Res Vet Sci 2011; 90:404-11. [DOI: 10.1016/j.rvsc.2010.07.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2008] [Revised: 07/08/2010] [Accepted: 07/10/2010] [Indexed: 11/29/2022]
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Leukemia inhibitory factor stimulates the transition of primordial to primary follicle and supports the goat primordial follicle viability in vitro. ZYGOTE 2011; 20:73-8. [PMID: 21414252 DOI: 10.1017/s0967199411000074] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The aim of this study was to evaluate the effect of leukemia inhibitory factor (LIF) on the activation and survival of preantral follicles cultured in vitro enclosed in ovarian fragments (in situ). Goat ovarian cortex was divided into fragments to be used in this study. One fragment was immediately fixed (fresh control - FC) and the remaining fragments were cultured in supplemented minimum essential medium (MEM) without (cultured control - CC) or with different concentrations of LIF (1, 10, 50, 100 or 200 ng/ml) for 1 or 7 days, at 39°C in air with 5% CO2. Fresh control, CC and treated ovarian fragments were processed for histological and fluorescence analysis. The percentage of histological normal preantral follicles cultured for 7 days with 1 ng/ml (49.3%), 10 ng/ml (58.6%) and 50 ng/ml (58%) of LIF was higher than in the CC (32.6%; p < 0.05). After 7 days of culture, the percentage of primordial follicles in situ cultured with LIF decreased and primary follicles increased in all LIF concentrations compared with FC and CC (p < 0.05). In conclusion, LIF induced primordial follicle activation and supported preantral follicle viability of goat ovarian tissues cultured for 7 days.
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Wang Y, Zhao X, Su J, An Z, Xiong X, Wang L, Liu J, Quan F, Hua S, Zhang Y. Lowering storage temperature during ovary transport is beneficial to the developmental competence of bovine oocytes used for somatic cell nuclear transfer. Anim Reprod Sci 2011; 124:48-54. [DOI: 10.1016/j.anireprosci.2011.01.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2010] [Revised: 01/10/2011] [Accepted: 01/24/2011] [Indexed: 10/18/2022]
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Chaves RN, Lima-Verde IB, Celestino JJH, Duarte ABG, Alves AMCV, Matos MHT, Campello CC, Name KPO, Báo SN, Buratini J, Figueiredo JR. Fibroblast growth factor-10 maintains the survival and promotes the growth of cultured goat preantral follicles. Domest Anim Endocrinol 2010; 39:249-58. [PMID: 20920782 DOI: 10.1016/j.domaniend.2010.06.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2010] [Revised: 06/22/2010] [Accepted: 06/25/2010] [Indexed: 10/19/2022]
Abstract
The aim of the present study was to investigate the effects of fibroblast growth factor-10 (FGF-10) on the survival, activation (transition from primordial to primary follicles), and growth of goat preantral follicles cultured in vitro. Pieces of ovarian cortex were cultured for 1 and 7 d in the absence or presence of FGF-10 (0, 1, 10, 50, 100, and 200 ng/mL). Noncultured and cultured tissues were processed and analyzed by histology, transmission electron microscopy, and viability testing. Results showed that after 7 d, a greater percentage (79.9%) of morphologically normal follicles (containing an oocyte with regular shape and uniform cytoplasm, and organized layers of granulosa cells without a pyknotic nucleus) was observed when cultured with 50 ng/mL of FGF-10 when compared with other concentrations of FGF-10 (0 ng/mL, 67.3%; 1 ng/mL, 68.2%; 10 ng/mL, 63.3%; 100 ng/mL, 64.4%; 200 ng/mL, 52.7%). Ultrastructural analyses and viability testing using fluorescent markers confirmed the follicular integrity of FGF-10 (50 ng/mL)-treated fragments after 7 d of culture. After 7 d, all FGF-10 concentrations reduced the percentage of primordial follicles and increased the percentage of developing follicles. In the presence of 50 ng/mL of FGF-10, follicles increased in diameter after 7 d of culture when compared with other concentrations tested. In conclusion, this study demonstrates that FGF-10 maintains the morphological integrity of goat preantral follicles and stimulates the growth of activated follicles in culture. The culture conditions identified here contribute to the understanding of the factors involved in goat early follicular development.
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Affiliation(s)
- R N Chaves
- Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), Faculty of Veterinary Medicine, State University of Ceará, Av. Paranjana 1700, Campus Itaperi, Fortaleza, 60740-903, CE, Brazil.
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Lima G, Costa L, Cavalcanti D, Rodrigues C, Freire F, Fontenele-Neto J, Silva A. Short-term storage of canine preantral ovarian follicles using a powdered coconut water (ACP®)-based medium. Theriogenology 2010; 74:146-52. [DOI: 10.1016/j.theriogenology.2010.01.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2009] [Revised: 01/18/2010] [Accepted: 01/30/2010] [Indexed: 11/16/2022]
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Canine preantral follicles cultured with various concentrations of follicle-stimulating hormone (FSH). Theriogenology 2010; 74:749-55. [PMID: 20537700 DOI: 10.1016/j.theriogenology.2010.03.028] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2009] [Revised: 02/14/2010] [Accepted: 03/26/2010] [Indexed: 11/23/2022]
Abstract
The objective was to evaluate the effects of various concentrations of exogenous FSH during in vitro culture of isolated canine preantral follicles. Preantral secondary follicles (>200 microm) were isolated by microdissection and cultured for 18 d in supplemented alpha-Minimum Essential Medium (alpha-MEM). There were three treatment groups: 1) absence of FSH (control medium); 2) FSH100 (fixed concentration of 100 ng/mL throughout the entire culture period); and 3) sequential FSH (FSHSeq - 100, 500, and 1,000 ng/mL were added sequentially). Following culture, all follicles from all treatments were still viable (marked green by calcein-AM). The initial (D0) average follicle diameter for the control, FSH100, and FSHSeq was (mean +/- SEM) 298.96 +/- 7.02, 286.00 +/- 5.87, and 275.39 +/- 174 6.55 microm, respectively (P > 0.05). Mean diameter of follicles treated with FSHSeq on Day 18 (D18-439.80 +/- 14.08 microm) was greater than those of the other treatments (P < 0.05). Daily follicular growth rate (microm/d) of follicles in the FSHSeq treatment (6.47 +/- 0.55) was significantly faster than for both the control (3.67 +/- 0.32) and FSH100 (4.47 +/- 0.38) treatments. Furthermore, FSH100 and FSHSeq treatments had a significantly higher rate of antrum formation than the control group on D12 of culture, whereas after D12, FSH100 had a significantly higher rate of extrusion compared to the control (P < 0.05). In conclusion, the sequential addition of FSH to the culture medium maintained the survival of isolated canine preantral follicles and promoted an increased rate of follicular growth and antrum formation.
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