1
|
Gómez-Guzmán JA, Parra-Bracamonte GM, Velazquez MA. Impact of Heat Stress on Oocyte Developmental Competence and Pre-Implantation Embryo Viability in Cattle. Animals (Basel) 2024; 14:2280. [PMID: 39123806 PMCID: PMC11311040 DOI: 10.3390/ani14152280] [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: 07/14/2024] [Revised: 07/31/2024] [Accepted: 08/03/2024] [Indexed: 08/12/2024] Open
Abstract
Rectal and vaginal temperatures are utilised in both in vivo and in vitro models to study the effects of heat stress on oocyte competence and embryo viability in cattle. However, uterine temperature increases by only 0.5 °C in heat-stressed cows, significantly lower than simulated increases in in vitro models. Temperature variations within oviducts and ovarian follicles during heat stress are poorly understood or unavailable, and evidence is lacking that oocytes and pre-implantation embryos experience mild (40 °C) or severe (41 °C) heat stress inside the ovarian follicle and the oviduct and uterus, respectively. Gathering detailed temperature data from the reproductive tract and follicles is crucial to accurately assess oocyte competence and embryo viability under realistic heat stress conditions. Potential harm from heat stress on oocytes and embryos may result from reduced nutrient availability (e.g., diminished blood flow to the reproductive tract) or other unidentified mechanisms affecting tissue function rather than direct thermal effects. Refining in vivo stress models in cattle is essential to accurately identify animals truly experiencing heat stress, rather than assuming heat stress exposure as done in most studies. This will improve model reliability and aid in the selection of heat-tolerant animals.
Collapse
Affiliation(s)
- Javier A. Gómez-Guzmán
- Centro de Biotecnología Genómica, Instituto Politécnico Nacional, Reynosa 88710, Tamaulipas, Mexico; (J.A.G.-G.); (G.M.P.-B.)
| | - Gaspar M. Parra-Bracamonte
- Centro de Biotecnología Genómica, Instituto Politécnico Nacional, Reynosa 88710, Tamaulipas, Mexico; (J.A.G.-G.); (G.M.P.-B.)
| | - Miguel A. Velazquez
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
| |
Collapse
|
2
|
Rosales-Martínez F, Becerril-Pérez CM, Rosendo-Ponce A, Riaño-Gaya A, Cortez-Romero C, Gallegos-Sánchez J, Romo-García S. In Vitro Embryos of Romosinuano and Tropical Milking Cattle during Three Seasons in Veracruz, Mexico. Animals (Basel) 2024; 14:1922. [PMID: 38998034 PMCID: PMC11240306 DOI: 10.3390/ani14131922] [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: 04/02/2024] [Revised: 05/16/2024] [Accepted: 05/21/2024] [Indexed: 07/14/2024] Open
Abstract
One of the main factors that influences the fertility of cattle in grazing systems in hot tropical climates is heat stress. The objective of this study was to evaluate the effect of season, breed, hormonal and physiological condition on the quantity and quality of cumulus-oocyte complexes (COCs) and embryos produced in vitro, from Romosinuano (RM) and Tropical Milking (TM) donors. Three ovum pick-up and in vitro fertilization (OPU-IVF) were performed, one per season: hot dry (HD; 10, 10), hot humid (HH; 9, 9) and fresh dry (FD; 7, 10) in RM and LT donors. Serum levels of cortisol, insulin and glucose were measured, in addition to heart rate (HR), respiratory rate (RR) and rectal temperature (RT). Effect of season x genotype interaction (p ≤ 0.05) was observed in all COC variables and only in cleavage embryos (CLI) (p ≤ 0.05). Body weight (BW) affected all COC variables (p ≤ 0.01), except unviable (UNV) although affected degenerated embryos (DEG) (p ≤ 0.01) and total blastocysts (BLAST) (p ≤ 0.01). Cow age only affected viable COCs (VIAB) (p ≤ 0.05), code one blastocysts (BC1) and BLAST (p ≤ 0.01). Cortisol affected total COCs (COCsT), VIAB and total matured in vitro (TMIV) (p ≤ 0.01), as well as CLI, BC1 (p ≤ 0.01) and BLAST (p ≤ 0.05). Insulin affected COCsT (p ≤ 0.01), UNV (p ≤ 0.05), denuded oocytes (DE) (p ≤ 0.01), BC1 and code two blastocysts (BC2) (p ≤ 0.01). Glucose affected all COC variables (p ≤ 0.01), except UNV and all embryo variables except BC2. HR affected COCsT, DE, TMIV (p ≤ 0.01), CLI, BLAST and DEG (p ≤ 0.05). RR affected COCsT, UNV, VIAB, CLI (p ≤ 0.05), BC1, BLAST and DEG (p ≤ 0.01). RT only affected DE, VIAB (p ≤ 0.01) and BLAST (p ≤ 0.05). The seasonal climatic year variation of Veracruz and changes in physiological and hormonal variables have diverse effects on the cumulus-oocyte complexes and embryos produced by RM and TM donors.
Collapse
Affiliation(s)
- Froylan Rosales-Martínez
- Facultad Maya de Estudios Agropecuarios, Universidad Autónoma de Chiapas, Catazajá C.P. 29980, Chiapas, Mexico;
| | - Carlos Miguel Becerril-Pérez
- Colegio de Postgraduados, Programa de Agroecosistemas Tropicales, Campus Veracruz, Manlio Fabio Altamirano C.P. 94251, Veracruz, Mexico;
- Colegio de Postgraduados, Programa de Ganadería, Campus Montecillo, Texcoco C.P. 56230, Estado de México, Mexico;
| | - Adalberto Rosendo-Ponce
- Colegio de Postgraduados, Programa de Agroecosistemas Tropicales, Campus Veracruz, Manlio Fabio Altamirano C.P. 94251, Veracruz, Mexico;
| | - Alberto Riaño-Gaya
- Reproducción Genética Avanzada RGA In Vitro, Boca del Río C.P. 94299, Veracruz, Mexico;
| | - César Cortez-Romero
- Colegio de Postgraduados, Campus San Luis, Salinas de Hidalgo C.P. 78622, San Luis Potosí, Mexico;
| | - Jaime Gallegos-Sánchez
- Colegio de Postgraduados, Programa de Ganadería, Campus Montecillo, Texcoco C.P. 56230, Estado de México, Mexico;
| | - Salvador Romo-García
- Facultad de Estudios Superiores de Cuautitlán, Universidad Nacional Autónoma de México, Cuatitlán Izcalli C.P. 54714, Estado de México, Mexico;
| |
Collapse
|
3
|
Blocher R, Liu Y, Patrick T, Polejaeva IA. Cytokine-Supplemented Maturation Medium Enhances Cytoplasmic and Nuclear Maturation in Bovine Oocytes. Animals (Basel) 2024; 14:1837. [PMID: 38929455 PMCID: PMC11200980 DOI: 10.3390/ani14121837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Revised: 06/18/2024] [Accepted: 06/19/2024] [Indexed: 06/28/2024] Open
Abstract
Bovine in vitro oocyte maturation (IVM) is an easy way to obtain oocytes for subsequent assisted reproductive techniques but is inefficient compared to in vivo maturation. Supplementation of three cytokines, fibroblast growth factor 2 (FGF2), leukemia inhibitory factor (LIF), and insulin-like growth factor 1 (IGF1), or FLI, has increased oocyte maturation and embryo development in multiple species, but studies have not explored the oocyte differences caused by FLI IVM supplementation. This study aimed to assess important nuclear and cytoplasmic maturation events in high-quality oocytes. FLI-supplemented oocytes had a decreased GV (3.0% vs. 13.7%, p < 0.01) and increased telophase I incidence (34.6% vs. 17.6%, p < 0.05) after IVM, increased normal meiotic spindles (68.8% vs. 50.0%, p < 0.001), and an increased nuclear maturation rate (75.1% vs. 66.8%, p < 0.001). Moreover, in metaphase II oocytes, the percentage of FLI-treated oocytes with a diffuse mitochondrial distribution was higher (87.7% vs. 77.5%, p < 0.05) and with a cortical mitochondrial distribution was lower (11.6% vs. 17.4%, p < 0.05). Additionally, FLI-supplemented oocytes had more pattern I cortical granules (21.3% vs. 14.4%, p < 0.05). These data suggest that FLI supplementation in bovine in vitro maturation medium coordinates nuclear and cytoplasmic maturation to produce higher-quality oocytes.
Collapse
Affiliation(s)
| | | | | | - Irina A. Polejaeva
- Animal, Dairy, and Veterinary Sciences Department, Utah State University, 4815 Old Main Hill, Logan, UT 84322, USA; (R.B.); (Y.L.); (T.P.)
| |
Collapse
|
4
|
Rakha SI, Elmetwally MA, El-Sheikh Ali H, Balboula A, Mahmoud AM, Zaabel SM. Importance of Antioxidant Supplementation during In Vitro Maturation of Mammalian Oocytes. Vet Sci 2022; 9:vetsci9080439. [PMID: 36006354 PMCID: PMC9415395 DOI: 10.3390/vetsci9080439] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 08/12/2022] [Accepted: 08/14/2022] [Indexed: 11/16/2022] Open
Abstract
The in vitro embryo production (IVEP) technique is widely used in the field of reproductive biology. In vitro maturation (IVM) is the first and most critical step of IVEP, during which, the oocyte is matured in an artificial maturation medium under strict laboratory conditions. Despite all of the progress in the field of IVEP, the quality of in vitro matured oocytes remains inferior to that of those matured in vivo. The accumulation of substantial amounts of reactive oxygen species (ROS) within oocytes during IVM has been regarded as one of the main factors altering oocyte quality. One of the most promising approaches to overcome ROS accumulation within oocytes is the supplementation of oocyte IVM medium with antioxidants. In this article, we discuss recent advancements depicting the adverse effects of ROS on mammalian oocytes. We also discuss the potential use of antioxidants and their effect on both oocyte quality and IVM rate.
Collapse
Affiliation(s)
- Shimaa I. Rakha
- Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
- Reproductive Biotechnology Research Laboratory, College of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Mohammed A. Elmetwally
- Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
- Reproductive Biotechnology Research Laboratory, College of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Hossam El-Sheikh Ali
- Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
- Reproductive Biotechnology Research Laboratory, College of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Ahmed Balboula
- Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
- Reproductive Biotechnology Research Laboratory, College of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
- Animal Sciences Research Center, University of Missouri, Columbia, MO 65211, USA
| | - Abdelmonem Montaser Mahmoud
- Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
- Reproductive Biotechnology Research Laboratory, College of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Samy M. Zaabel
- Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
- Reproductive Biotechnology Research Laboratory, College of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
- Correspondence:
| |
Collapse
|
5
|
Stamperna K, Dovolou E, Giannoulis T, Kalemkeridou M, Nanas I, Dadouli K, Moutou K, Mamuris Z, Amiridis GS. Developmental competence of heat stressed oocytes from Holstein and Limousine cows matured in vitro. Reprod Domest Anim 2021; 56:1302-1314. [PMID: 34289185 DOI: 10.1111/rda.13993] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 07/20/2021] [Indexed: 11/29/2022]
Abstract
The negative effects of heat stress on dairy cattle's fertility have been extensively studied, but the relevant knowledge for beef cattle is rather limited. The aims of this study were to investigate the effects of HS during in vitro maturation on the developmental potential of oocytes derived from Limousine and Holstein cows and to estimate the effect of the differential gene expression of important genes in oocytes, cumulus cells and blastocysts in the growth competence between the breeds. In seven replicates, cumulus oocyte complexes from Holstein and Limousine cows were matured for 24 hr at 39°C (controls C; Hol_39, Lim_39) or at 41°C from hour 2 to hour 8 of IVM (treated T; Hol_41, Lim_41), fertilized, and presumptive zygotes were cultured for 9 days at 39°C. Cleavage and embryo formation rates were evaluated 48 hr post-insemination and on days 7, 8 and 9, respectively. From all groups, subsets of cumulus cells, oocytes and blastocysts were analysed for the relative expression of genes related to metabolism, stress, apoptosis and placentation. No difference was detected in cleavage rate or in blastocyst formation rate among the control groups. In both breeds, heat stress reduced blastocyst yield, but at all days the suppression was higher in Limousines. In Holsteins, altered gene expression was detected in cumulus cells (G6PD, GLUT1) and blastocysts (PLAC8), while in Limousines, differences were found in oocytes (G6PD, HSP90AA1), in cumulus cells (CPT1B, HSP90AA1, SOD2) and blastocysts (DNMT, HSP90AA1, SOD2). It appears that Holstein COCs are more tolerant than Limousine COCs, possibly due to compulsory, production driven selection.
Collapse
Affiliation(s)
- Konstantina Stamperna
- Department of Obstetrics and Reproduction, Veterinary Faculty, University of Thessaly, Karditsa, Greece
| | - Eleni Dovolou
- Department of Animal Science, University of Thessaly, Larissa, Greece
| | | | - Maria Kalemkeridou
- Laboratory of Genetics, Comparative and Evolutionary Biology, Department of Biochemistry and Biotechnology, University of Thessaly, Larissa, Greece
| | - Ioannis Nanas
- Department of Obstetrics and Reproduction, Veterinary Faculty, University of Thessaly, Karditsa, Greece
| | - Katerina Dadouli
- Department of Obstetrics and Reproduction, Veterinary Faculty, University of Thessaly, Karditsa, Greece
| | - Katerina Moutou
- Laboratory of Genetics, Comparative and Evolutionary Biology, Department of Biochemistry and Biotechnology, University of Thessaly, Larissa, Greece
| | - Zissis Mamuris
- Laboratory of Genetics, Comparative and Evolutionary Biology, Department of Biochemistry and Biotechnology, University of Thessaly, Larissa, Greece
| | - Georgios S Amiridis
- Department of Obstetrics and Reproduction, Veterinary Faculty, University of Thessaly, Karditsa, Greece
| |
Collapse
|
6
|
Wang Z, Fu H, Zhou Y, Yan M, Chen D, Yang M, Xiao S, Chen C, Huang L. Identification of the gut microbiota biomarkers associated with heat cycle and failure to enter oestrus in gilts. Microb Biotechnol 2021; 14:1316-1330. [PMID: 33305898 PMCID: PMC8313273 DOI: 10.1111/1751-7915.13695] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 10/16/2020] [Accepted: 10/18/2020] [Indexed: 01/09/2023] Open
Abstract
Failed puberty is one of the main reasons for eliminating gilts from production herds. This is often caused by disorders of sex hormones. An increasing number of studies have suggested that the gut microbiota may regulate sex hormones and vice versa. Whether the gut microbiota is involved in the failure of oestrus in gilts remains unknown. We used 16S rRNA gene sequencing, network-based microbiota analysis and prediction of functional capacity from 16S rRNA gene sequences to explore the shifts in the gut microbiota throughout a heat cycle in 22 eight-month-old gilts. We found that a module of co-occurrence networks composed of Sphaerochaeta and Treponema, co-occurred with oestrus during a heat cycle. The mcode score of this module reflecting the stability and importance in the network achieved the highest value at the oestrus stage. We then identified bacterial biosignatures associated with the failure to show puberty in 163 gilts. Prevotella, Treponema, Faecalibacterium, Oribacterium, Succinivibrio and Anaerovibrio were enriched in gilts showing normal heat cycles, while Lachnospiraceae, Ruminococcus, Coprococcus and Oscillospira had higher abundance in gilts failing to show puberty. Prediction of functional capacity of the gut microbiome identified a lesser abundance of the pathway 'retinol metabolism' in gilts that failed to undergo puberty. This pathway was also significantly associated with those bacterial taxa involved in failed puberty identified in this study (P < 0.05). This result suggests that the changed gut bacteria might result in a disorder of retinol metabolism, and this may be an explanation for the failure to enter oestrus.
Collapse
Affiliation(s)
- Zhong Wang
- State Key Laboratory of Pig Genetic Improvement and Production TechnologyJiangxi Agricultural UniversityNanchangJiangxi330045China
| | - Hao Fu
- State Key Laboratory of Pig Genetic Improvement and Production TechnologyJiangxi Agricultural UniversityNanchangJiangxi330045China
| | - Yunyan Zhou
- State Key Laboratory of Pig Genetic Improvement and Production TechnologyJiangxi Agricultural UniversityNanchangJiangxi330045China
| | - Min Yan
- State Key Laboratory of Pig Genetic Improvement and Production TechnologyJiangxi Agricultural UniversityNanchangJiangxi330045China
| | - Dong Chen
- State Key Laboratory of Pig Genetic Improvement and Production TechnologyJiangxi Agricultural UniversityNanchangJiangxi330045China
| | - Ming Yang
- Zhongkai University of Agriculture and EngineeringGuangzhouGuangdong510225China
| | - Shijun Xiao
- State Key Laboratory of Pig Genetic Improvement and Production TechnologyJiangxi Agricultural UniversityNanchangJiangxi330045China
| | - Congying Chen
- State Key Laboratory of Pig Genetic Improvement and Production TechnologyJiangxi Agricultural UniversityNanchangJiangxi330045China
| | - Lusheng Huang
- State Key Laboratory of Pig Genetic Improvement and Production TechnologyJiangxi Agricultural UniversityNanchangJiangxi330045China
| |
Collapse
|
7
|
Lee S, Kang HG, Jeong PS, Kim MJ, Park SH, Song BS, Sim BW, Kim SU. Heat stress impairs oocyte maturation through ceramide-mediated apoptosis in pigs. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 755:144144. [PMID: 33288257 DOI: 10.1016/j.scitotenv.2020.144144] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 11/25/2020] [Accepted: 11/25/2020] [Indexed: 06/12/2023]
Abstract
Heat stress (HS) is an emerging issue that greatly impairs the reproductive performance of animals and humans. In particular, disruption of oocyte maturation due to HS is considered a major cause of impaired reproductive performance. HS is known to induce ceramide generation, which causes reactive oxygen species (ROS) production and mitochondrial dysfunction, thereby inducing apoptosis. Therefore, we investigated whether inhibition of ceramide generation ameliorates HS-induced apoptosis in porcine cumulus-oocyte complexes (COCs) using specific inhibitors of the de novo (fumonisin B1, FB1) and hydrolytic pathways (desipramine, Des) of ceramide formation. We investigated the effects of FB1 and Des supplementation under HS conditions (41.5 °C for 44 h) on in vitro maturation (IVM) of porcine COCs. After IVM, HS significantly reduced proportion of COCs exhibiting fully expanded cumulus cells and the rate of metaphase II in oocytes. After parthenogenetic activation (PA), HS significantly reduced the rates of cleavage and blastocyst formation with a lower total cell number and a higher percentage of apoptosis in blastocysts. However, FB1 or Des supplementation under HS avoided detrimental effects of HS on expansion of cumulus cells, nuclear maturation of oocytes, and embryonic development after PA including the rates of cleavage and blastocyst formation, total cell number, and the percentage of apoptosis in blastocysts. Furthermore, FB1 or Des addition under HS, compared with HS alone, significantly decreased ceramide generation, ROS production, cytochrome C expression, and apoptosis and increased mitochondrial membrane potential in COCs, reaching levels comparable with those of the control. Taken together, our results indicate that HS impaired oocyte maturation through ceramide-mediated apoptosis.
Collapse
Affiliation(s)
- Sanghoon Lee
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, Republic of Korea
| | - Hyo-Gu Kang
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, Republic of Korea
| | - Pil-Soo Jeong
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, Republic of Korea
| | - Min Ju Kim
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, Republic of Korea
| | - Soo-Hyun Park
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, Republic of Korea
| | - Bong-Seok Song
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, Republic of Korea
| | - Bo-Woong Sim
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, Republic of Korea; National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, Republic of Korea
| | - Sun-Uk Kim
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, Republic of Korea; National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, Republic of Korea; Department of Functional Genomics, KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon 34113, Republic of Korea.
| |
Collapse
|
8
|
Stamperna K, Giannoulis T, Nanas I, Kalemkeridou M, Dadouli K, Moutou K, Amiridis GS, Dovolou E. Short term temperature elevation during IVM affects embryo yield and alters gene expression pattern in oocytes, cumulus cells and blastocysts in cattle. Theriogenology 2020; 156:36-45. [PMID: 32652327 DOI: 10.1016/j.theriogenology.2020.06.039] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/22/2020] [Accepted: 06/27/2020] [Indexed: 12/20/2022]
Abstract
Heat stress causes subfertility in cattle by inducing alterations in steroidogenic capacity, follicular function and ovulation defects, which eventually negatively affect oocyte quality and embryo survival. Here, the effects of short, moderate temperature elevation during IVM, on embryo yield, and on the expression of various genes was evaluated. In 8 replicates, cumulus oocyte complexes (COCs) were matured for 24 h at 39 °C (controls n = 605) or at 41 °C from hour 2 to hour 8 of IVM (treated, n = 912), fertilized, and presumptive zygotes were cultured for 9 days at 39 °C. Cleavage and embryo formation rates were evaluated 48 h post insemination and on days 7, 8, 9 respectively. Cumulus cells, oocytes and blastocysts from 5 replicates were snap frozen for the relative expression analysis of genes related to metabolism, thermal and oxidative stress response, apoptosis, and placentation. In treated group, cleavage and embryo formation rates were statistically significantly lower compared with the control (cleavage 86.7% vs 74.2%; blastocysts: day 7, 29.9% vs 19.7%, day 8, 34.2% vs 22.9% and day 9 35.9% vs 24.5%). Relative mRNA abundance of three genes in cumulus cells (HSP90AA1, CPT1B, G6PD) and three genes in blastocysts (DNMT3A, PLAC8, GPX1) indicated significantly different expression between groups (p < 0.05)., The expression of G6PD, SOD2, GXP1 in oocytes and PTGS2 in blastocysts tended to differ among groups (0.05<p < 0.08). Heat stress altered (p < 0.05) the correlation of expression between HSPs and other genes in oocytes (G6PD, GPX1, CCNB1), cumulus cells (LDH, CCNB1) and blastocysts (AKR1B1, PLAC8). These results imply that exposure of oocytes to elevated temperature, even for only 6 h, disrupts the developmental competence of the oocytes, suppresses blastocyst yield and significantly alters the coordinated pattern of gene expressions.
Collapse
Affiliation(s)
- Konstantina Stamperna
- Department of Obstetrics and Reproduction, Veterinary Faculty, University of Thessaly, Karditsa, Greece
| | - Themistoklis Giannoulis
- Department of Obstetrics and Reproduction, Veterinary Faculty, University of Thessaly, Karditsa, Greece; Department of Genetics, Comparative and Evolutionary Biology, Faculty of Biochemistry and Biotechnology, University of Thessaly, Larissa, Greece
| | - Ioannis Nanas
- Department of Obstetrics and Reproduction, Veterinary Faculty, University of Thessaly, Karditsa, Greece
| | - Maria Kalemkeridou
- Department of Genetics, Comparative and Evolutionary Biology, Faculty of Biochemistry and Biotechnology, University of Thessaly, Larissa, Greece
| | - Katerina Dadouli
- Department of Obstetrics and Reproduction, Veterinary Faculty, University of Thessaly, Karditsa, Greece
| | - Katerina Moutou
- Department of Genetics, Comparative and Evolutionary Biology, Faculty of Biochemistry and Biotechnology, University of Thessaly, Larissa, Greece
| | - Georgios S Amiridis
- Department of Obstetrics and Reproduction, Veterinary Faculty, University of Thessaly, Karditsa, Greece.
| | - Eleni Dovolou
- Department of Obstetrics and Reproduction, Veterinary Faculty, University of Thessaly, Karditsa, Greece
| |
Collapse
|
9
|
Moura MT, Paula-Lopes FF. Thermoprotective molecules to improve oocyte competence under elevated temperature. Theriogenology 2020; 156:262-271. [PMID: 32784066 DOI: 10.1016/j.theriogenology.2020.06.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 06/12/2020] [Accepted: 06/13/2020] [Indexed: 02/06/2023]
Abstract
Heat stress is an environmental factor that challenges livestock by disturbing animal homeostasis. Despite the broad detrimental effects of heat stress on reproductive function, the germline and the early preimplantation embryo are particularly prone. There is extensive evidence that elevated temperature reduces oocyte developmental competence through a series of cellular and molecular damages. Further research revealed that the oocyte respond to stress by activating cellular mechanisms such as heat shock response, unfolded protein response and autophagy to improve survival under heat shock. Such knowledge paved the way for the identification of thermoprotective molecules that alleviate heat-induced oocyte oxidative stress, organelle damage, and apoptosis. Therefore, this review depicts the deleterious effects of heat shock on oocyte developmental competence, heat-induced cellular and molecular changes, outlines pro-survival cellular mechanisms and explores thermoprotective molecules to improve oocyte competence.
Collapse
Affiliation(s)
- Marcelo T Moura
- Department of Biological Sciences, Federal University of São Paulo - UNIFESP, Diadema, SP, Brazil
| | - Fabíola F Paula-Lopes
- Department of Biological Sciences, Federal University of São Paulo - UNIFESP, Diadema, SP, Brazil.
| |
Collapse
|
10
|
Gardela J, Ruiz-Conca M, Álvarez-Rodríguez M, Mogas T, López-Béjar M. Induction of CIRBP expression by cold shock on bovine cumulus-oocyte complexes. Reprod Domest Anim 2020; 54 Suppl 4:82-85. [PMID: 31625234 DOI: 10.1111/rda.13518] [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: 05/01/2019] [Revised: 07/11/2019] [Accepted: 07/12/2019] [Indexed: 11/30/2022]
Abstract
The aim of this study was to induce the cold-inducible RNA-binding protein (CIRBP) expression on cumulus-oocyte complexes (COCs) through exposure to a sub-lethal cold shock and determine the effects of hypothermic temperatures during the in vitro maturation of bovine oocytes. Nuclear maturation, cortical granule redistribution and identification of cold-inducible RNA-binding protein (CIRBP) were assessed after 24 hr of in vitro maturation of control (38.5°C) and cold-stressed oocytes (33.5°C). The presence of CIRBP was assessed by Western blot in COCs or denuded oocytes and their respective cumulus cells. Based on the odds ratio, cold-stressed oocytes presented higher abnormal cytoplasmic distribution of cortical granules and nuclear maturation than the control group. Although CIRBP was detected in both control and cold-stressed groups, cold-stressed COCs had 2.17 times more expression of CIRBP than control COCs. However, when denuded oocytes and cumulus cells were assessed separately, CIRBP only was detected in cumulus cells in both groups. In conclusion, cold shock induced CIRBP expression, but it negatively affected nuclear maturation and cortical granule distribution of bovine oocytes. Moreover, the expression of CIRBP was only identified in cumulus cells but not in oocytes.
Collapse
Affiliation(s)
- Jaume Gardela
- Department of Animal Health and Anatomy, Veterinary Faculty, ERPAW (Endocrinology, Reproductive Physiology and Animal Welfare) Research Group, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
| | - Mateo Ruiz-Conca
- Department of Animal Health and Anatomy, Veterinary Faculty, ERPAW (Endocrinology, Reproductive Physiology and Animal Welfare) Research Group, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
| | - Manuel Álvarez-Rodríguez
- Department of Animal Health and Anatomy, Veterinary Faculty, ERPAW (Endocrinology, Reproductive Physiology and Animal Welfare) Research Group, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain.,Department of Clinical and Experimental Medicine (IKE), Linköping University, Linköping, Sweden
| | - Teresa Mogas
- Department of Animal Medicine and Surgery, Veterinary Faculty, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
| | - Manel López-Béjar
- Department of Animal Health and Anatomy, Veterinary Faculty, ERPAW (Endocrinology, Reproductive Physiology and Animal Welfare) Research Group, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
| |
Collapse
|
11
|
Cordeiro ALL, Satrapa RA, Gregianini HAG, Gregianini JTF, Maia GFN, Landim-Alvarenga FC. Influence of temperature-humidity index on conception rate of Nelore embryos produced in vitro in northern Brazil. Trop Anim Health Prod 2019; 52:1527-1532. [PMID: 31758386 DOI: 10.1007/s11250-019-02141-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 10/31/2019] [Indexed: 11/24/2022]
Abstract
Considering the high temperatures that the tropical climate provides to most of Brazil and the effects of thermal stress on reproductive processes, the objective of the present study was to analyze, in the warmer months of 2016, conception rates of Nelore bovine embryos in Acre state. For this purpose, oocytes were aspirated (ultrasound-guided follicular aspiration), matured, fertilized with Nelore bull semen, cultured for 6 days, and then the embryos were transferred to crossbred recipients. Pregnancy diagnosis was performed 30 and 60 days after embryo transfer. Meteorological data were obtained at www.inmet.gov.br to generate temperature-humidity index (THI). The data from the conception rates and periods of the year were submitted to the chi-square test at 5% probability to verify independence. Regression analysis was used to verify the relationship between THI and gestation rate. There was a strong relationship between conception rates and THI values, verified by an increase in conception rates as THI values were reduced and a decrease when THI reached the highest value. Our findings demonstrated a negative effect of heat stress in conception rates of crossbred cows in northern Brazil.
Collapse
Affiliation(s)
- A L L Cordeiro
- Center for Biological and Nature Sciences, Federal University of Acre, P.O. Box 69920900, Rio Branco, Acre, Brazil.
| | - R A Satrapa
- Center for Biological and Nature Sciences, Federal University of Acre, P.O. Box 69920900, Rio Branco, Acre, Brazil
| | | | | | - G F N Maia
- Center for Biological and Nature Sciences, Federal University of Acre, P.O. Box 69920900, Rio Branco, Acre, Brazil
| | - F C Landim-Alvarenga
- Department of Animal Reproduction and Veterinary Radiology, School of Veterinary Medicine and Animal Science, Paulista State University - UNESP, P.O. Box 18618681, Botucatu, São Paulo, Brazil
| |
Collapse
|
12
|
Egashira J, Ihara Y, Khatun H, Wada Y, Konno T, Tatemoto H, Yamanaka KI. Efficient in vitro embryo production using in vivo-matured oocytes from superstimulated Japanese Black cows. J Reprod Dev 2019; 65:183-190. [PMID: 30745496 PMCID: PMC6473104 DOI: 10.1262/jrd.2018-155] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We examined whether the use of in vivo-matured oocytes, collected by ovum pick-up (OPU) from superstimulated Japanese Black cows, can improve the productivity and quality of in vitro produced embryos. The cows were superstimulated by treatment with progesterone, GnRH, FSH and prostaglandin F2α according to a standardized protocol. The resulting in vivo-matured oocytes were collected by OPU and used subsequently for the other experiments. The immature oocytes from cows in the non-stimulated group were collected by OPU and then subjected to maturation in vitro. We found that the rate of normally distributed cortical granules of the matured oocyte cytoplasm in the superstimulated group was significantly higher than that in the non-stimulated group. The normal cleavage rate (i.e., production of embryos with two equal blastomeres without fragmentation) and freezable blastocyst rate were significantly higher in the superstimulated group than in the non-stimulated group. Among the transferable blastocysts, the ratio of embryos from normal cleavage was also significantly higher in the superstimulated group than in the non-stimulated group. For in vivo-matured oocytes, it was observed that the pregnancy rates were significantly higher when normally cleaved embryos were used for transfer. Taken together, these results suggest that high-quality embryos with respect to developmental kinetics can be efficiently produced with the use of in vivo-matured oocytes collected by OPU from superstimulated Japanese Black cows.
Collapse
Affiliation(s)
- Junki Egashira
- Faculty of Agriculture, Saga University, Saga 840-8502, Japan.,The United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima 890-0065, Japan.,Saga Prefectural Livestock Experiment Station, Saga 849-2305, Japan
| | - Yusuke Ihara
- Faculty of Agriculture, Saga University, Saga 840-8502, Japan
| | - Hafiza Khatun
- Faculty of Agriculture, Saga University, Saga 840-8502, Japan.,The United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima 890-0065, Japan.,Faculty of Animal Husbandry, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Yasuhiko Wada
- Faculty of Agriculture, Saga University, Saga 840-8502, Japan.,The United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima 890-0065, Japan
| | - Toshihiro Konno
- The United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima 890-0065, Japan.,Faculty of Agriculture, University of the Ryukyus, Okinawa 903-0213, Japan
| | - Hideki Tatemoto
- The United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima 890-0065, Japan.,Faculty of Agriculture, University of the Ryukyus, Okinawa 903-0213, Japan
| | - Ken-Ichi Yamanaka
- Faculty of Agriculture, Saga University, Saga 840-8502, Japan.,The United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima 890-0065, Japan
| |
Collapse
|
13
|
Ruiz-Conca M, Vendrell M, Sabés-Alsina M, Mogas T, Lopez-Bejar M. Coenzyme Q 10 supplementation during in vitro maturation of bovine oocytes (Bos taurus) helps to preserve oocyte integrity after vitrification. Reprod Domest Anim 2018; 52 Suppl 4:52-54. [PMID: 29052321 DOI: 10.1111/rda.13056] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Oocyte vitrification causes less cell stress than slow cooling, but cytoskeletal and spindle alterations may occur affecting the oocyte competence. In vitro maturation (IVM) supplementation with different antioxidant molecules has been performed to attenuate this harmful stress. Coenzyme Q10 (CoQ10 ) supplementation has previously shown to have positive effects in bovine and mouse in vitro embryo development. The aim of this study was to evaluate the effects of CoQ10 during bovine oocyte IVM and vitrification. Cumulus-oocyte complexes (COCs) (n = 311) were cultured under standard maturation conditions with 0 μM (control), 25 μM and 50 μM CoQ10 supplementation. After 22 hr, a cohort of 170 oocytes both from the control and from CoQ10 -supplemented groups were vitrified, warmed and returned to incubation until 24 hr of maturation, while the rest of the oocytes (n = 141) remained fresh. Then, oocyte survival was assessed morphologically by stereomicroscopy. Oocytes from all groups were then fixed and stained for assessing cortical granules (CG) migration and nuclear stage. High rates of oocyte MII progression and appropriate CG migration as a continuous layer beneath the plasma membrane were obtained both in control and in CoQ10 groups. Results showed that although vitrification has great impact in survival of IVM bovine oocytes, 50 μM CoQ10 supplementation significantly improved oocyte survival (p = .045) and reduced the premature CG exocytosis, helping to preserve the CG migration pattern (31.3% control vs. 54.5% in 50 μM CoQ10 ; p = .039), attenuating the negative effects of vitrification.
Collapse
Affiliation(s)
- M Ruiz-Conca
- Veterinary Faculty, Department of Animal Health and Anatomy, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - M Vendrell
- Veterinary Faculty, Department of Animal Health and Anatomy, Universitat Autònoma de Barcelona, Barcelona, Spain.,Veterinary Faculty, Department of Animal Medicine and Surgery, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - M Sabés-Alsina
- Veterinary Faculty, Department of Animal Health and Anatomy, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - T Mogas
- Veterinary Faculty, Department of Animal Medicine and Surgery, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - M Lopez-Bejar
- Veterinary Faculty, Department of Animal Health and Anatomy, Universitat Autònoma de Barcelona, Barcelona, Spain
| |
Collapse
|
14
|
López-Gatius F, Hunter R. From pre-ovulatory follicle palpation to the challenge of twin pregnancies: Clinical reflections following one million gynaecological examinations in dairy cows. Reprod Domest Anim 2017; 52 Suppl 4:4-11. [DOI: 10.1111/rda.13041] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- F. López-Gatius
- Agrotecnio Center; University of Lleida; Lleida Spain
- Transfer in Bovine Reproduction SLu; Barbastro Spain
| | - R.H.F. Hunter
- Sidney Sussex College; University of Cambridge; Cambridge England
- Ladfield; Jedburgh Scotland
| |
Collapse
|
15
|
Peralta-Torres JA, Aké-López JR, Segura-Correa JC, Aké-Villanueva JR. Effect of season on follicular population, quality and nuclear maturation of bovine oocytes under tropical conditions. Anim Reprod Sci 2017; 187:47-53. [PMID: 29017744 DOI: 10.1016/j.anireprosci.2017.10.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 09/12/2017] [Accepted: 10/04/2017] [Indexed: 10/18/2022]
Abstract
The aim was to determine the effect of season of the year and the presence of a corpus luteum (CL) on follicular population (FP) and the quality of the oocytes, and of season on nuclear maturation of the bovine oocytes under tropical conditions. Three seasons were evaluated: hot-dry (March-June), hot-humid (July-October) and fresh-humid (November-February). In a first study, 1112 bovine ovaries were obtained from a local slaughterhouse. Follicles were classified as small (≤4mm), middle (4.1-8mm) and large (≥8.1mm); and the maximum diameter of the follicle (MDF) and CL (MDCL) were also recorded. The oocytes were collected by aspiration and classified as viable (grade I and II) and damaged (grade III and IV). In the second study, 2261 viable oocytes were matured in vitro, and then fixed and stained with Lacmoid to classify the stage of development as mature (metaphase II), immature or degenerate. Data were analyzed using analysis of variance and chi-square procedures. The largest FP of large follicles (0.67), MDF (1.18mm), MDCL (1.87mm), and the highest proportion of viable oocytes (34.19%) were obtained during the hot-humid season (P<0.05). The ovaries without CL had the greatest FP (10.34) with more viable oocytes (24.44%). The highest proportion of mature oocytes (76.92%) was also obtained in the hot-humid season. In conclusion, season influenced FP, MDF, MDCL, and the quality and nuclear maturation of oocytes. The presence of a CL in the ovary resulted in a decrease of FP and viability of oocytes.
Collapse
Affiliation(s)
- Jorge Alonso Peralta-Torres
- División Académica de Ciencias Agropecuarias. Universidad Juárez Autónoma de Tabasco, Carretera Villahermosa-Teapa Km. 25, R/A La Huasteca 2ª Sección, ZP 86280 Villahermosa, Tabasco, Mexico.
| | - Jesús Ricardo Aké-López
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Carretera Mérida-Xmatkuil Km. 15.5, ZP, 97100 Mérida, Yucatán, Mexico
| | - José Candelario Segura-Correa
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Carretera Mérida-Xmatkuil Km. 15.5, ZP, 97100 Mérida, Yucatán, Mexico
| | - Jesús Ricardo Aké-Villanueva
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Carretera Mérida-Xmatkuil Km. 15.5, ZP, 97100 Mérida, Yucatán, Mexico
| |
Collapse
|
16
|
López-Gatius F, Hunter RHF. Clinical relevance of pre-ovulatory follicular temperature in heat-stressed lactating dairy cows. Reprod Domest Anim 2017; 52:366-370. [DOI: 10.1111/rda.12916] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Accepted: 11/30/2016] [Indexed: 11/30/2022]
Affiliation(s)
- F López-Gatius
- Agrotecnio Center; University of Lleida; Lleida Spain
- Transfer in Bovine Reproduction SLu; Barbastro Spain
| | - RHF Hunter
- Sidney Sussex College; University of Cambridge; Cambridge England
- Ladfield; Jedburgh Scotland
| |
Collapse
|
17
|
Developmental competence and expression profile of genes in buffalo (Bubalus bubalis) oocytes and embryos collected under different environmental stress. Cytotechnology 2016; 68:2271-2285. [PMID: 27650183 DOI: 10.1007/s10616-016-0022-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Accepted: 08/23/2016] [Indexed: 12/14/2022] Open
Abstract
The study examined the effects of different environmental stress on developmental competence and the relative abundance (RA) of various gene transcripts in oocytes and embryos of buffalo. Oocytes collected during cold period (CP) and hot period (HP) were matured, fertilized and cultured in vitro to blastocyst hatching stage. The mRNA expression patterns of genes implicated in developmental competence (OCT-4, IGF-2R and GDF-9), heat shock (HSP-70.1), oxidative stress (MnSOD), metabolism (GLUT-1), pro-apoptosis (BAX) and anti-apoptosis (BCL-2) were evaluated in immature and matured oocytes as well as in pre-implantation stage embryos. Oocytes reaching MII stage, cleavage rates, blastocyst yield and hatching rates increased (P < 0.05) during the CP. In MII oocytes and 2-cell embryos, the RA of OCT-4, IGF-2R, GDF-9, MnSOD and GLUT-1 decreased (P < 0.05) during the HP. In 4-cell embryos, the RA of OCT-4, IGF-2R and BCL-2 decreased (P < 0.05) in the HP, whereas GDF-9 increased (P < 0.05). In 8-to 16-cell embryos, the RA of OCT-4 and BCL-2 decreased (P < 0. 05) in the HP, whereas HSP-70.1 and BAX expression increased (P < 0.05). In morula and blastocyst, the RA of OCT-4, IGF-2R and MnSOD decreased (P < 0.05) during the HP, whereas HSP-70.1 was increased (P < 0.05). In conclusion, deleterious seasonal effects induced at the GV-stage carry-over to subsequent embryonic developmental stages and compromise oocyte developmental competence and quality of developed blastocysts.
Collapse
|
18
|
De Rensis F, Garcia-Ispierto I, López-Gatius F. Seasonal heat stress: Clinical implications and hormone treatments for the fertility of dairy cows. Theriogenology 2015; 84:659-66. [DOI: 10.1016/j.theriogenology.2015.04.021] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Revised: 04/11/2015] [Accepted: 04/11/2015] [Indexed: 12/21/2022]
|
19
|
El-Tarabany MS, El-Tarabany AA. Impact of maternal heat stress at insemination on the subsequent reproductive performance of Holstein, Brown Swiss, and their crosses. Theriogenology 2015; 84:1523-9. [PMID: 26324113 DOI: 10.1016/j.theriogenology.2015.07.040] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 07/29/2015] [Accepted: 07/30/2015] [Indexed: 10/23/2022]
Abstract
Heat stress in hot environments is one of the major factors that can negatively affect milk production, reproduction, and the health of dairy cows. The aim of this study was to evaluate the impact of maternal heat stress at insemination on the subsequent reproductive performance of the pure Holstein (HO), Brown Swiss (BS), and their F1 crossbred (BF) cows, under subtropical Egyptian conditions. The influence of temperature-humidity index (THI) on the pregnancy rate, fetal loss rate, calving traits, and reproductive indices were investigated. Fetal loss rate of pure HO was significantly increased from 17.1% at low THI to 24.9% at greater THI (odds ratio = 2.09; P = 0.032). Furthermore, abortion and stillbirth rates of pure HO were significantly increased from 3.6% and 3.8%, respectively, at low THI to 7.2% and 5.9%, respectively, at greater THI (odds ratio = 2.17 and 2.58; P = 0.037 and 0.031, respectively). In contrast, BS and BF cows can tolerate the heat stress, as there were no differences in the fetal loss, abortion, and calving difficulty rates at the different levels of THI. Pure HO cows had a significant longer calving interval and days open at high THI (449 and 173 days, respectively), compared with low THI (421 and 146 days, respectively). On the contrary, BS and BF cows had no difference in the calving interval at the different levels of THI. Our results indicate that pure BS and BF cows have a better adaptability and competent reproductive performance than pure HO under subtropical conditions.
Collapse
Affiliation(s)
- Mahmoud S El-Tarabany
- Department of Animal Wealth Development, Faculty of Veterinary Medicine, Zagazig University, Sharkia, Egypt.
| | - Akram A El-Tarabany
- Biological Applications Department, Radioisotopes Applications Division, NRC, Atomic Energy Authority, Inshas, Cairo, Egypt
| |
Collapse
|
20
|
Moussa M, Shu J, Zhang X, Zeng F. Maternal control of oocyte quality in cattle “a review”. Anim Reprod Sci 2015; 155:11-27. [DOI: 10.1016/j.anireprosci.2015.01.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 11/20/2014] [Accepted: 01/15/2015] [Indexed: 02/09/2023]
|
21
|
Hansen PJ. Genetic variation in resistance of the preimplantation bovine embryo to heat shock. Reprod Fertil Dev 2015; 27:22-30. [DOI: 10.1071/rd14311] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Reproduction is among the physiological functions in mammals most susceptible to disruption by hyperthermia. Many of the effects of heat stress on function of the oocyte and embryo involve direct effects of elevated temperature (i.e. heat shock) on cellular function. Mammals limit the effects of heat shock by tightly regulating body temperature. This ability is genetically controlled: lines of domestic animals have been developed with superior ability to regulate body temperature during heat stress. Through experimentation in cattle, it is also evident that there is genetic variation in the resistance of cells to the deleterious effects of elevated temperature. Several breeds that were developed in hot climates, including Bos indicus (Brahman, Gir, Nelore and Sahiwal) and Bos taurus (Romosinuano and Senepol) are more resistant to the effects of elevated temperature on cellular function than breeds that evolved in cooler climates (Angus, Holstein and Jersey). Genetic differences are expressed in the preimplantation embryo by Day 4–5 of development (after embryonic genome activation). It is not clear whether genetic differences are expressed in cells in which transcription is repressed (oocytes >100 µm in diameter or embryos at stages before embryonic genome activation). The molecular basis for cellular thermotolerance has also not been established, although there is some suggestion for involvement of heat shock protein 90 and the insulin-like growth factor 1 system. Given the availability of genomic tools for genetic selection, identification of genes controlling cellular resistance to elevated temperature could be followed by progress in selection for those genes within the populations in which they exist. It could also be possible to introduce genes from thermotolerant breeds into thermally sensitive breeds. The ability to edit the genome makes it possible to design new genes that confer protection of cells from stresses like heat shock.
Collapse
|
22
|
Effects of heat shock during the early stage of oocyte maturation on the meiotic progression, subsequent embryonic development and gene expression in ovine. ZYGOTE 2014; 23:573-82. [DOI: 10.1017/s0967199414000203] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
SummaryHeat shock may affect different aspects of oocyte maturation and its subsequent development to the blastocyst stage. A series of in vitro experiments was performed to determine whether physiologically heat shock (41°C) disrupts the progression of the ovine oocytes through meiosis, activation and blastocyst formation. Cumulus–oocyte complexes (COCs) were aspirated from 2–6-mm follicles and cultured at 38.5°C (control) or 41°C (heat shock) for the first 12 h of maturation. The oocytes were incubated at 38.5°C during the last 10 h of maturation and 8 days after activation. Results showed that most of the oocytes matured under heat-shock conditions remained at the germinal vesicle breakdown (GVBD) stage and they showed an aberrant chromatin configuration. After heat shock, oocyte diameter and time spent for zona pellucida dissolution increased (P < 0.05). The heat-shocked group had a higher percentage of oocytes with incomplete migration of cortical granules (P < 0.05). The heat-shock condition decreased (P < 0.05) cleavage rates (56.19 versus 89.28%) and morula formation (26.85 versus 37.81%). However, there was no significant difference in blastocyst formation and percentage of hatched blastocysts. At 12 h, heat shock had an adverse effect on embryo quality and reduced inner cell mass number (P < 0.05). Quantitative gene expression analysis showed greater transcripts (P < 0.05) for Na/K-ATPase mRNA in heat-shocked oocytes. To sum up, heat shock has disruptive effects on ovine oocyte maturation and can impair cellular and molecular factors that are important for embryo development.
Collapse
|
23
|
Garcia-Ispierto I, Roselló MA, De Rensis F, López-Gatius F. A five-day progesterone plus eCG-based fixed-time AI protocol improves fertility over spontaneous estrus in high-producing dairy cows under heat stress. J Reprod Dev 2013; 59:544-8. [PMID: 23934319 PMCID: PMC3934145 DOI: 10.1262/jrd.2013-041] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
This study compared the efficiency of a five-day or standard (nine-day) progesterone-based regimen combined with equine chorionic gonadotrophin (eCG) in a fixed-time AI (FTAI) protocol for dairy cows. The data examined were derived from 3577 inseminations conducted in three dairy herds. Animals with no estrus signs detected over 21 days were randomly assigned to a PRID-9 or PRID-5 group. Cows in each group received a progesterone intravaginal device (PRID) for 9 or 5 days, respectively, PGF(2α) and eCG on PRID removal, and GnRH 48 h later. Fixed-time AI was performed 12 h after the GnRH dose. Cows artificially inseminated following spontaneous estrus during the study period were considered as controls. Based on the odds ratio, the likelihoods of animals in PRID-9 in the warm (conception rate [CR] of 22.3%) and cool (32% CR) periods, and control animals in the warm period (26.6% CR) becoming pregnant were reduced (by factors of 0.6, 0.3 and 0.4, respectively) compared with the control animals in the cool period (CR of 43.7%). The risk of a twin pregnancy was higher (51.4%) for cystic PRID-9 cows (by a factor of 3.6) and lower (9.9%) for cyclic PRID-5 animals (by a factor of 0.4) compared with the PRID-9 cyclic cows. These findings indicate that the proposed protocol achieves similar results during the cool or warm season to those obtained when AI is conducted at spontaneous estrus during the cool season. In addition, PRID-5 reduced twin pregnancy compared with PRID-9.
Collapse
|
24
|
Cebrian-Serrano A, Salvador I, Raga E, Dinnyes A, Silvestre MA. Beneficial Effect of Melatonin on BlastocystIn VitroProduction from Heat-Stressed Bovine Oocytes. Reprod Domest Anim 2013; 48:738-46. [DOI: 10.1111/rda.12154] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2012] [Accepted: 01/10/2013] [Indexed: 11/28/2022]
Affiliation(s)
| | - I Salvador
- Centro de Tecnología Animal; Instituto Valenciano de Investigaciones Agrarias; Segorbe; Spain
| | - E Raga
- Centro de Tecnología Animal; Instituto Valenciano de Investigaciones Agrarias; Segorbe; Spain
| | | | | |
Collapse
|
25
|
Abstract
Heat stress (HS) is especially harmful for bovine ovarian follicle development and oocyte competence. Furthermore, HS causes premature aging in oocytes due to high levels of reactive oxygen species (ROS), involved in the harmful effects over the oocyte maturation and the steroidogenic activity of follicular cells. In this study, the presumptive protective effects of antioxidant agents on heat-stressed oocytes were evaluated. Heifer oocytes were matured for 22 h under control (38°C) and HS conditions (41.5°C at 18-21 h of maturation). For each oocyte, nuclear stage and cortical granule (CG) distribution were evaluated. Steroidogenic activity of cumulus cells was also recorded. The antioxidant agents used in the study were: retinol (1.43 μg/ml), retinyl (0.28 μg/ml) and oleic acid (0.05 mg/ml). Based on a chi-squared test (P < 0.05), HS affected negatively the metaphase II (MII) progression and produced a premature CG exocytosis. Retinol improved the oocyte MII progression. However, retinyl and oleic acid, at the concentrations used in this study, could not counteract adverse effects of HS. A decrease in progesterone and increase in estradiol availability were observed when retinyl and oleic acid were supplemented to the maturation medium, respectively. In conclusion, retinol proved to be valuable in heat-stressed oocytes protecting nuclear maturation.
Collapse
|
26
|
López-Gatius F. Factors of a noninfectious nature affecting fertility after artificial insemination in lactating dairy cows. A review. Theriogenology 2012; 77:1029-41. [DOI: 10.1016/j.theriogenology.2011.10.014] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2011] [Revised: 09/22/2011] [Accepted: 10/08/2011] [Indexed: 11/30/2022]
|
27
|
Rispoli LA, Lawrence JL, Payton RR, Saxton AM, Schrock GE, Schrick FN, Middlebrooks BW, Dunlap JR, Parrish JJ, Edwards JL. Disparate consequences of heat stress exposure during meiotic maturation: embryo development after chemical activation vs fertilization of bovine oocytes. Reproduction 2011; 142:831-43. [PMID: 21994359 DOI: 10.1530/rep-11-0032] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Consequences of heat stress exposure during the first 12 h of meiotic maturation differed depending on how and when bovine oocytes were activated. If heat-stressed oocytes underwent IVF at ~24 h, blastocyst development was less than for respective controls and similar to that obtained for nonheat-stressed oocytes undergoing IVF at 30 h (i.e. slightly aged). In contrast, if heat-stressed oocytes underwent chemical activation with ionomycin/6-dimethylaminopurine at 24 h, blastocyst development was not only higher than respective controls, but also equivalent to development obtained after activation of nonheat-stressed oocytes at 30 h. Developmental differences in chemically activated vs IVF-derived embryos were not related to fertilization failure or gross alterations in cytoskeletal components. Rather, ionomycin-induced calcium release and MAP kinase activity were less in heat-stressed oocytes. While underlying mechanisms are multifactorial, ability to obtain equivalent or higher development after parthenogenetic activation demonstrates that oocytes experiencing heat stress during the first 12 h of meiotic maturation have the necessary components to develop to the blastocyst stage, but fail to do so after fertilization.
Collapse
Affiliation(s)
- L A Rispoli
- Department of Animal Science, Institute of Agriculture, UT AgResearch, The University of Tennessee, Knoxville, Tennessee 37996-4574, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Takahashi M. Heat stress on reproductive function and fertility in mammals. Reprod Med Biol 2011; 11:37-47. [PMID: 29699104 DOI: 10.1007/s12522-011-0105-6] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2011] [Accepted: 07/07/2011] [Indexed: 01/29/2023] Open
Abstract
In most mammalian species including cattle, heat stress has deleterious effects on nutritional, physiological and reproductive functions. Exposure of animals to a hot environment causes an increase in body temperature in mammals, including domestic animals. High ambient temperature also causes a decrease in the length and intensity of estrus by disturbing ovarian function as well as decreasing pregnancy rate after artificial insemination. Therefore, it is important to understand the effects of heat stress on reproductive function in order to improve the production of domestic animals. Heat stress decreases appetite, weight gain, and milk yield in dairy cattle. It also adversely affects the reproductive performance of both sexes. In males, it reduces spermatogenic activity, while in females it adversely impacts oogenesis, oocyte maturation, fertilization development and implantation rate. Detection and evaluation of the deteriorating effects of heat stress on reproductive organs and cells can help to design measures to prevent them and improve reproductive functions. In this review, we discuss the impacts of heat stress on reproductive functions.
Collapse
Affiliation(s)
- Masashi Takahashi
- National Agricultural Research Center for Kyushu Okinawa Region Suya 2421 861-1192 Koshi Kumamoto Japan
| |
Collapse
|
29
|
López-Gatius F. Feeling the ovaries prior to insemination. Clinical implications for improving the fertility of the dairy cow. Theriogenology 2011; 76:177-83. [DOI: 10.1016/j.theriogenology.2011.01.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2010] [Revised: 01/30/2011] [Accepted: 01/31/2011] [Indexed: 11/17/2022]
|