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de Moraes FLZ, Morotti F, Barca Junior FA, Seneda MM. Effects of maternal antral follicle count in Bos taurus indicus cattle on the genetic merit of male offspring and antral follicle count of female offspring. Theriogenology 2024; 217:151-158. [PMID: 38277797 DOI: 10.1016/j.theriogenology.2024.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 01/04/2024] [Accepted: 01/05/2024] [Indexed: 01/28/2024]
Abstract
This study evaluated the effects of antral follicle count (AFC) in female cattle on offspring characteristics. Recently calved multiparous Bos indicus cows (Nelore; n = 222) were evaluated using ultrasonography on random days of their estrous cycle to determine the AFC and were classified into "low" (≤15 follicles), "intermediate" (≥16 and ≤ 29 follicles), and "high" (≥30 follicles) AFC groups. Weight and scrotal circumference (SC) of male offspring from these cows (n = 127) were determined from 20 to 27 months, and the data were added to a genetic evaluation program (economic total genetic merit, MGTe and TOP value) that uses the kinship matrix to evaluate the genetic relationship between animals. The AFC of female offspring from these cows (n = 95) was evaluated to analyze the relationship between the AFC of mothers and daughters. The effects of maternal AFC on the genetic merit of male and female offspring were analyzed using GLIMMIX and GLM, respectively. Correlations were assessed using the Pearson's coefficient. Male offspring of cows with high AFC had superior MGTe (P = 0.005) and TOP values (P = 0.01) than those from cows with low AFC. Additionally, the AFC of mothers was positively correlated with MGTe (R = 0.33; P < 0.0001) and negatively correlated with TOP values (R = -0.32; P < 0.0001). The SC (P = 0.01), but not body weight of the offspring (P = 0.46) was affected by maternal AFC. The daughters' AFC were correlated (R = 0.29; P = 0.004) with mothers' AFC and were influenced by maternal (P = 0.05) but not paternal (P = 0.77) effect. In conclusion, cows with high AFC produced males with greater MGTe, superior TOP values and higher SC. Maternal AFC did not influence the weight of male offspring but was correlated with the AFC of daughters.
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Affiliation(s)
| | - Fábio Morotti
- Universidade Estadual de Londrina (UEL), Londrina, PR, Brazil; Universidade Norte do Parana, UNOPAR, Arapongas, PR, Brazil
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Delchiaro SB, Oliveira PVDLF, Júnior RJP, Gonçalves GD, Morotti F, Seneda MM. Relationships between antral follicle count and reproductive characteristics of embryo-recipient mares. J Equine Vet Sci 2024; 134:105029. [PMID: 38346582 DOI: 10.1016/j.jevs.2024.105029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 01/16/2024] [Accepted: 02/06/2024] [Indexed: 02/19/2024]
Abstract
Mares (n = 77) were evaluated by antral follicle count (AFC) and selected as embryo recipients. Cyclic recipients received embryos between days 4-6 after ovulation. The acyclic recipients received an intramuscular (i.m.) protocol with 5mg of estradiol benzoate (EB) on the day of donor ovulation (D0; D-4 recipient), 3mg of EB on the following day (D1; D-3 recipient), and 3mg of EB (D2; D-2 recipient). Furthermore, 1500mg of progesterone (P4) i.m. given on D0 of the recipient (D4 donor) followed by 1500mg of P4 on the day of ET (D4-6 recipient). On the ET day, the AFC and animals' weight, body condition score (BCS), corpus luteum diameter, age and degree of uterine edema (UE) were measured. Pregnancy was confirmed on days 12 and 30. Low AFC was defined as ≤11 follicles (n = 43 mares) and high AFC as >11 follicles (n = 34 mares). Data were analyzed by a mixed effect model, including AFC group, reproductive seasonality, and season (P ≤ 0.05). UE was influenced (P = 0.05) by reproductive seasonality. The conception rate was higher (P = 0.016) in recipients with low (79.07 %) than high AFC (61.76 %) and higher (P = 0.005) in cyclic (81.40 %) than anestrus (58.82 %) mares. In addition, we observed a tendency (P = 0.06) for the interaction of AFC*reproductive seasonality, showing that high*anoestrus recipients had the lowest conception rate (37.50 %b) compared to high*cyclic (83.33 %a), low*anoestrus (77.78 %a) and low*cyclic (80 %a). The conception rate was higher in cyclic recipients with low AFC. Furthermore, UE was influenced by reproductive seasonality and mares in anestrus showed a higher degree of UE than cyclic mares.
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Affiliation(s)
- Sofia Botsaris Delchiaro
- State University of Londrina (UEL), Highway Celso Garcia Cid, PR-445, Km 380 - Campus Universitário, Londrina, PR, 86057-970, Brazil.
| | | | - Rubens José Paulossi Júnior
- State University of Londrina (UEL), Highway Celso Garcia Cid, PR-445, Km 380 - Campus Universitário, Londrina, PR, 86057-970, Brazil
| | - Gabrieli Dutra Gonçalves
- State University of Londrina (UEL), Highway Celso Garcia Cid, PR-445, Km 380 - Campus Universitário, Londrina, PR, 86057-970, Brazil
| | - Fábio Morotti
- State University of Londrina (UEL), Highway Celso Garcia Cid, PR-445, Km 380 - Campus Universitário, Londrina, PR, 86057-970, Brazil
| | - Marcelo Marcondes Seneda
- State University of Londrina (UEL), Highway Celso Garcia Cid, PR-445, Km 380 - Campus Universitário, Londrina, PR, 86057-970, Brazil.
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Miranda AG, Seneda MM, Faustino LR. DNA methylation associated with polycystic ovary syndrome: a systematic review. Arch Gynecol Obstet 2024; 309:373-383. [PMID: 37119419 DOI: 10.1007/s00404-023-07025-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Accepted: 03/08/2023] [Indexed: 05/01/2023]
Abstract
PURPOSE Polycystic ovary syndrome (PCOS) is an endocrine metabolic disease that affects women of reproductive age and is one of the main causes of anovulatory infertility. However, the cause of PCOS is yet fully understood, and genetic factors play an important role in its etiology. In this study, we reviewed the main genes involved in the etiology of PCOS and the influence of DNA methylation, aiming to answer the study´s guiding question: 'What is the influence of DNA methylation on the main genes involved in PCOS?'. METHODS We used the MEDLINE database, and inclusion criteria (primary and original articles, written in English, found through our entry terms) and exclusion criteria (literature reviews and articles that used animals to perform the experiments and that focused in other epigenetics mechanism without being DNA methylation) were applied. RESULTS Twenty-three scientific articles, from a total of 43 articles read in full, were chosen for this study. Eighteen studies confirmed DNA methylation associated with PCOS. CONCLUSION The most relevant genes related to PCOS were INSR, LHCGR, and RAB5B, which may be epigenetically altered in DNA, with the first two genes hypomethylated and the last hypermethylated. The epigenetic changes presented in the genes related to PCOS or their promoters were only at the CpG sites.
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Affiliation(s)
- Arícia Gomes Miranda
- Curso de Medicina, Campus Ministro Reis Velloso, Universidade Federal do Delta do Parnaíba (UFDPar), Parnaíba, Piauí, Brazil
| | - Marcelo Marcondes Seneda
- Laboratório de Reprodução Animal, Centro de Ciências Agrárias, Universidade Estadual de Londrina (UEL), Londrina, Paraná, Brazil
| | - Luciana Rocha Faustino
- Curso de Medicina, Campus Ministro Reis Velloso, Universidade Federal do Delta do Parnaíba (UFDPar), Parnaíba, Piauí, Brazil.
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Fanhani GG, Cavalieri FLB, Andreazzi MA, da Silva CI, Andreazzi KC, Pereira LDC, Emanuelli IP, Dos Santos JMG, Moreski DAB, Colombo AHB, Morotti F, Seneda MM. Progesterone Device Use Improves Ovum Pick-Up Efficiency in Acyclic Donors. J Equine Vet Sci 2023; 131:104933. [PMID: 37776919 DOI: 10.1016/j.jevs.2023.104933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 08/20/2023] [Accepted: 09/23/2023] [Indexed: 10/02/2023]
Abstract
The aim of this study was to evaluate follicular dynamics and ovum pick-up (OPU) efficacy in untreated mares or mares treated with an intravaginal progesterone (P4) device during seasonal anestrus (acyclic) and during the breeding season (cyclic). Six mares (mean age = 5 years), were recruited into an ovum pick-up scheme that was performed every 14 days with and without the P4 device, during the acyclic and cyclic phases. Aspirations amounted to seven procedures with or without the P4 device during each phase. Five ultrasound assessments were performed at each interval between the OPUs. Data on follicular number and diameter as well as the numbers of recovered and the percentage of recovered oocytes were also collected. The number of follicles from mares in the acyclic phase was higher (P < .005) regardless of the treatment. However, the follicular diameter was smaller for the P4 group (P < .005) from the 2nd to the 5th evaluation post-OPU procedure. The percentage of oocytes recovered during the acyclic phase was higher for mares treated with the P4 device (P < .005). The P4 device resulted in follicles with smaller diameters and facilitated OPU efficacy.
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Affiliation(s)
- Gabriela Genta Fanhani
- Campus Maringá, Programa de Pós-Graduação em Tecnologias Limpas e Curso de Medicina Veterinária, Universidade Cesumar (UNICESUMAR), Maringá, Parana, Brazil
| | - Fábio Luiz Bim Cavalieri
- Campus Maringá, Programa de Pós-Graduação em Tecnologias Limpas e Curso de Medicina Veterinária, Universidade Cesumar (UNICESUMAR), Maringá, Parana, Brazil
| | - Márcia Aparecida Andreazzi
- Campus Maringá, Programa de Pós-Graduação em Tecnologias Limpas e Curso de Medicina Veterinária, Universidade Cesumar (UNICESUMAR), Maringá, Parana, Brazil
| | - Caroline Isabela da Silva
- Programa de Pós-Graduação em Ciência de Alimentos, Universidade Estadual de Maringá (UEM), Maringá, Parana, Brazil
| | - Kelly Cristina Andreazzi
- Campus Maringá, Programa de Pós-Graduação em Tecnologias Limpas e Curso de Medicina Veterinária, Universidade Cesumar (UNICESUMAR), Maringá, Parana, Brazil
| | - Letícia da Costa Pereira
- Campus Maringá, Programa de Pós-Graduação em Tecnologias Limpas e Curso de Medicina Veterinária, Universidade Cesumar (UNICESUMAR), Maringá, Parana, Brazil
| | - Isabele Picada Emanuelli
- Campus Maringá, Programa de Pós-Graduação em Tecnologias Limpas e Curso de Medicina Veterinária, Universidade Cesumar (UNICESUMAR), Maringá, Parana, Brazil
| | - José Maurício Gonçalves Dos Santos
- Campus Maringá, Programa de Pós-Graduação em Tecnologias Limpas e Curso de Medicina Veterinária, Universidade Cesumar (UNICESUMAR), Maringá, Parana, Brazil
| | - Danieli Aparecida Bobbo Moreski
- Campus Maringá, Programa de Pós-Graduação em Tecnologias Limpas e Curso de Medicina Veterinária, Universidade Cesumar (UNICESUMAR), Maringá, Parana, Brazil
| | - Antonio Hugo Bezerra Colombo
- Campus Maringá, Programa de Pós-Graduação em Tecnologias Limpas e Curso de Medicina Veterinária, Universidade Cesumar (UNICESUMAR), Maringá, Parana, Brazil
| | - Fábio Morotti
- Laboratório de Biotecnologia da Reprodução Animal, Universidade Estadual de Londrina (UEL), Londrina, Parana, Brazil
| | - Marcelo Marcondes Seneda
- Laboratório de Biotecnologia da Reprodução Animal, Universidade Estadual de Londrina (UEL), Londrina, Parana, Brazil.
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Santos GMGD, Junior LB, Silva-Santos KC, Ayres Dias JH, Dias IDS, Seneda MM, Morotti F. Conception rate and pregnancy loss in fixed-time cattle embryo transfer programs are related to the luteal blood perfusion but not to the corpus luteum size. Theriogenology 2023; 210:251-255. [PMID: 37549464 DOI: 10.1016/j.theriogenology.2023.07.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/10/2023] [Accepted: 07/31/2023] [Indexed: 08/09/2023]
Abstract
This study aimed to evaluate the effect of luteal blood perfusion and corpus luteum (CL) area on the conception rate and occurrence of pregnancy loss of recipients in a large-scale fixed-time embryo transfer (FTET) program. Multiparous Brangus cows (n = 1700) at 45 days postpartum and body condition scores (BCS) between 2.5 and 4.0 (3.0 ± 0.3) were used in this study. On a random day of the estrous cycle (day -10), the females received progesterone and estradiol based on the FTET protocol. On day 7, 1465 recipients had at least one CL and were evaluated using B-mode ultrasound for the CL area (cm2) and color Doppler for the luteal blood perfusion score (I/low-vascularization area <40% of the CL; II/medium-vascularization >45% to < 50%; and III/high-vascularization >50%). Immediately after CL evaluation, each recipient received a single fresh embryo (blastocyst stage) ipsilateral to the CL, in vitro produced from a commercial laboratory. Pregnancy diagnosis was performed at 30 days and repeated 60 days later to evaluate pregnancy loss (30-90 days). Ultrasound evaluation and embryo transfer were performed by a single technician. For data analysis, in addition to luteal blood perfusion groups, recipients were retrospectively ranked according to CL area into small (<3 cm2; 2.63 ± 0.01), medium (>3 to < 4 cm2; 3.44 ± 0.01), and large (>4 cm2; 4.77 ± 0.03). Data were analyzed using a logistic regression model (P < 0.05). The overall conception rate was 44.2% (648/1465), influenced by the luteal blood perfusion score [P = 0.03; high 48.4%a (134/277), medium 44.6%a (427/958), and low 37.8%b (87/230)] but not by CL area ranking [P = 0.37; large 41.8% (225/538), medium 45.2% (276/610), and small 46.4% (147/317)]. There was no interaction between the luteal blood perfusion score and CL area ranking (P = 0.81), and the BCS did not affect the results of this study (P = 0.51). In terms of pregnancy loss up to 90 days, there was no effect on the CL area ranking (P = 0.77), but the flow score showed an effect [P = 0.03; high 3.6%b (5/139), medium 9.3%a (44/471), and low 10.3%a (10/97)]. The conception rate and occurrence of pregnancy loss in the FTET program in beef cattle are related to luteal blood perfusion but not CL size.
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Affiliation(s)
| | | | | | | | | | | | - Fábio Morotti
- UEL - Universidade Estadual de Londrina, Londrina, PR, Brazil; UNOPAR - Universidade Pitágoras Unopar Anhanguera, Arapongas, PR, Brazil.
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Miguez González S, Cerezetti MB, Bergamo LZ, Ferraz CR, Verri WA, Seneda MM. Oxidative activity of corpus luteum and ovarian parenchyma in Bos taurus indicus heifers. Anim Reprod 2023; 20:e20220084. [PMID: 37795200 PMCID: PMC10546912 DOI: 10.1590/1984-3143-ar2022-0084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 06/27/2023] [Indexed: 10/06/2023] Open
Abstract
The aim of this study was to evaluate the oxidative stress in ovaries and corpus luteum (CL) of Bos taurus indicus females and the oxidant effect of CL in ovarian tissues in regions near, intermediate, or distant from it. Ovaries (n=12) of Nelore heifers (n=6) were collected from a slaughterhouse and fragmented. Experiment 1, each ovary was obtained from three fragments, resulting in 18 fragments of ovaries with CL (OV+CL) and another 18 fragments of ovaries without CL (OV-CL). Three fragments were generated from CL, totaling 18 CL fragments. In experiment 2, the ovarian fragments were removed from specific regions near, intermediate, or distant from the CL. All the fragments were placed in Eppendorf-type microtubes (1 mL), kept in a thermal container at 4 ºC, and then stored in a -80 ºC freezer for analysis of oxidative stress (TBARS and NBT) and antioxidant potential (FRAP and ABTS). In the antioxidant activity analysis, luteal tissues showed more antioxidant activity than ovarian tissue (FRAP = P < 0.0001; ABTS = P < 0.02). In the oxidative stress analysis, CL had lower levels of reactive oxygen species (ROS; TBARS = P < 0.03; NBT = P < 0.0001) than ovarian tissues. There was no difference in antioxidant activity and oxidative stress between the fragments obtained from different regions (OV+CL versus OV-CL; P > 0.05). The presence of CL in the ovaries of Bos taurus indicus females did not influence the oxidative stress or antioxidant potential of the gonad. Thus, the removal of ovarian fragments with or without the presence of CL indicates that biotechnologies such as in vitro follicle cultivation is possible.
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Affiliation(s)
- Suellen Miguez González
- Laboratório de Biotecnologia da Reprodução Animal, Departamento de Clinicas Veterinárias - Centro de Ciências Agrarias, Universidade Estadual de Londrina, Londrina, PR, Brasil
| | - Marcela Bortoletto Cerezetti
- Laboratório de Biotecnologia da Reprodução Animal, Departamento de Clinicas Veterinárias - Centro de Ciências Agrarias, Universidade Estadual de Londrina, Londrina, PR, Brasil
| | - Larissa Zamparone Bergamo
- Laboratório de Biotecnologia da Reprodução Animal, Departamento de Clinicas Veterinárias - Centro de Ciências Agrarias, Universidade Estadual de Londrina, Londrina, PR, Brasil
| | - Camila Rodrigues Ferraz
- Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, PR, Brasil
| | - Waldiceu Aparecido Verri
- Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, PR, Brasil
| | - Marcelo Marcondes Seneda
- Laboratório de Biotecnologia da Reprodução Animal, Departamento de Clinicas Veterinárias - Centro de Ciências Agrarias, Universidade Estadual de Londrina, Londrina, PR, Brasil
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Souza AK, Zangirolamo AF, Droher RG, Bonato FGC, Alfieri AA, Carvalho da Costa M, Seneda MM. Investigation of the vaginal microbiota of dairy cows through genetic sequencing of short (Illumina) and long (PacBio) reads and associations with gestational status. PLoS One 2023; 18:e0290026. [PMID: 37611040 PMCID: PMC10446230 DOI: 10.1371/journal.pone.0290026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 08/01/2023] [Indexed: 08/25/2023] Open
Abstract
The vaginal microbiota has been shown to be important in local immune regulation and may play a role in reproduction and fertility. Next-generation sequencing (NGS) technologies have been used to characterize the bovine vaginal microbiota, mainly using short-read sequencing (Illumina). However, the main limitation of this technique is its inability to classify bacteria at the species level. The objective of this study was to characterize the bovine vaginal microbiota at the species level using long-read sequencing (PacBio) and to compare it with the results of short-read sequencing. In addition, the vaginal microbiota of cows that became pregnant after artificial insemination (AI) was compared with that of infertile animals. Thirteen Holstein cows had vaginal swabs collected prior to AI. DNA was extracted and subjected to Illumina and PacBio sequencing to characterize the V4 region and the entire 16S rRNA gene, respectively. PacBio sequencing yielded 366,509 reads that were assigned to 476 species from 27 phyla. However, none of the most abundant reads (>1%) could be classified at the species level. Illumina sequencing yielded more reads and consequently was able to detect a more observed species, but PacBio sequencing was able to detect more unique and rare species. The composition of the vaginal microbiota varies according to the sequencing method used, which might complicate the interpretation of results obtained in the majority of the current studies. The present study expands on the current knowledge of bovine microbiota, highlighting the need for further efforts to improve the current databanks.
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Affiliation(s)
- Anne Kemmer Souza
- National Institute of Science and Technology for Dairy Production Chain (INCT–LEITE), Universidade Estadual de Londrina, Londrina, Paraná, Brazil
- Laboratory of Biotechnology of Animal Reproduction, Department of Veterinary Clinics, Center for Agricultural Sciences, Universidade Estadual de Londrina, Londrina, Paraná, Brazil
| | - Amanda Fonseca Zangirolamo
- National Institute of Science and Technology for Dairy Production Chain (INCT–LEITE), Universidade Estadual de Londrina, Londrina, Paraná, Brazil
- Laboratory of Biotechnology of Animal Reproduction, Department of Veterinary Clinics, Center for Agricultural Sciences, Universidade Estadual de Londrina, Londrina, Paraná, Brazil
| | - Ricardo Guella Droher
- Laboratory of Biotechnology of Animal Reproduction, Department of Veterinary Clinics, Center for Agricultural Sciences, Universidade Estadual de Londrina, Londrina, Paraná, Brazil
| | - Francieli Gesleine Capote Bonato
- Laboratory of Biotechnology of Animal Reproduction, Department of Veterinary Clinics, Center for Agricultural Sciences, Universidade Estadual de Londrina, Londrina, Paraná, Brazil
| | - Amauri A. Alfieri
- National Institute of Science and Technology for Dairy Production Chain (INCT–LEITE), Universidade Estadual de Londrina, Londrina, Paraná, Brazil
| | | | - Marcelo Marcondes Seneda
- National Institute of Science and Technology for Dairy Production Chain (INCT–LEITE), Universidade Estadual de Londrina, Londrina, Paraná, Brazil
- Laboratory of Biotechnology of Animal Reproduction, Department of Veterinary Clinics, Center for Agricultural Sciences, Universidade Estadual de Londrina, Londrina, Paraná, Brazil
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Rossignolo EADA, Silva NCD, Stolf RL, Cavalieri FLB, Colombo AHB, Andreazzi MA, Seneda MM, Morotti F. Evaluation of hCG as gonadotropic support to timed embryo transfer protocol in beef cattle. Theriogenology 2023; 195:24-30. [DOI: 10.1016/j.theriogenology.2022.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 09/11/2022] [Accepted: 10/03/2022] [Indexed: 11/17/2022]
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Oliveira Junior JSD, Silva GMD, Moreira EM, Nunes VRR, Morotti F, Andrade ER, Seneda MM, Pfeifer LFM. Low versus high antral follicle count on the fertility of timed AI Nelore heifers. Braz J Vet Res Anim Sci 2022. [DOI: 10.11606/issn.1678-4456.bjvras.2022.190164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
This study aimed to determine the effect of antral follicle count (AFC), and pubertal status on the fertility of beef heifers. In this study, 230 Nelore heifers, 20±2 months of age, were subjected to an estradiol progesterone-based timed artificial insemination (TAI) program. On Day 0 of the TAI protocol, the heifers were examined by transrectal ultrasound to record videos of the ovaries. Later, in the darkroom of the laboratory of images, the videos were analyzed for AFC (≥ 3 mm) of each ovary. Females who failed the first TAI were resynchronized with the same hormonal protocol. The pregnancy status was evaluated by ultrasonography 30 days after each FTAI. The general mean of the AFC was 22.0 follicles. Thus, the heifers were divided into 2 groups according to AFC: Low AFC (˂ 22 follicles, n = 114), and High AFC (≥ 22 follicles, n = 116). No differences (P > 0.05) in the pregnancy per AI (P/AI) were observed between the Low and High AFC groups, and between pubertal and prepubertal categories. The P/AI was not different between heifers that displayed or did not estrus (P = 0.2). However, considering the estrus response of each AFC group, High AFC heifers that displayed estrus had greater P/AI (P = 0.01) than High AFC heifers that did not display estrus. In summary, AFC and pubertalstatus did not affect the fertility of Nelore heifers. In contrast, the P/AI of heifers that did not display estrus was lower than heifers observed in estrus only in the High AFC group.
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Affiliation(s)
| | - George Moreira da Silva
- Universidade Federal de Rondônia, Programa de Pós-graduação em Desenvolvimento Regional e Meio Ambiente
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Moraes FLZD, Bonato DV, Souza ACC, Morotti F, Seneda MM. Conception rate according to antral follicle count and oestrus expression in Nelore cows submitted to timed artificial insemination. Anim Prod Sci 2022. [DOI: 10.1071/an22074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Morotti F, Miguez-Gonzalez S, Cerezetti MB, Seneda MM. Evaluation of three classification methods of antral follicle count and fertility to the timed artificial insemination in cattle. Anim Reprod 2022; 19:e20210121. [PMID: 35493784 PMCID: PMC9037601 DOI: 10.1590/1984-3143-ar2021-0121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 03/23/2022] [Indexed: 11/21/2022] Open
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Canto Souza AC, Dutra Gonçalves G, Souza Ferro AO, Nakayama Yokomizo D, Vinicius Bonato D, Marcondes Seneda M. STRATEGIES TO INCREASE FERTILITY DURING FIXED-TIME ARTIFICIAL INSEMINATION IN BEEF CATTLE. SPERMOVA 2021. [DOI: 10.18548/aspe/0009.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The application of Fixed Time Artificial Insemination (FTAI) protocols has strongly boosted artificial insemination in Brazilian bovine herds. The control of the estrous cycle with protocols based on progesterone and estrogen involves synchronizing the emergence of a follicular wave, controlling the progesterone phase, and inducing ovulation in a synchronized manner. The increase in pregnancy rates starts with the preparation of the breeding season and the choice of protocols and females. Thereafter, based on the characteristics of the property and the lots of animals, small adjustments can be made to the hormonal protocols as needed. Finally, resynchronization can increase usability by allowing multiple inseminations within short periods. The search for new strategies is of paramount importance for the development of the FTAI protocol and the increase in final pregnancy rates. Thus, this review sought to highlight the main critical points and adjustments of the FTAI protocols and their applicability in the reproduction of beef cattle.
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Bortoliero Costa C, Korchovei Sanches T, Moreira dos Anjos M, Nakayama Yokomizo D, Marcondes Seneda M. MAXIMIZING IN VITRO EMBRYO PRODUCTION IN CATTLE. SPERMOVA 2021. [DOI: 10.18548/aspe/0009.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
In vitro embryo production (IVEP) is used to develop high-quality genetics associated with intergenerational genetic gain. It is characterized by acquisition (in vivo or post-mortem) and maturation (MIV) of oocytes from donors, followed by fertilization (FIV) of matured oocytes and culture (IVC) of embryos, which are then sent to transferred or cryopreserved. Even with extensive knowledge on IVEP, some biochemical and hormonal regulations that involve embryonic development are still unknown, leading to a low overall efficiency of the biotechnological process. Although in vitro developed embryos have a lower quality than that produced in vivo, in terms of resistance to challenging events, IVEP presents itself as a potential biotechnology. In cattle breeding, reproductive biotechnologies are key to increase and improve the genetic improvement of the herd, associated with productive and reproductive efficiency. In this article, the steps and strategies of IVEP and its contribution to reproduction in the cattle sector are discussed.
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Bonato DV, Ferreira EB, Gomes DN, Bonato FGC, Droher RG, Morotti F, Seneda MM. Follicular dynamics, luteal characteristics, and progesterone concentrations in synchronized lactating Holstein cows with high and low antral follicle counts. Theriogenology 2021; 179:223-229. [PMID: 34896744 DOI: 10.1016/j.theriogenology.2021.12.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 11/19/2021] [Accepted: 12/03/2021] [Indexed: 12/28/2022]
Abstract
We performed two experiments in high milk-producing Holstein cows. First, we evaluated the repeatability of the antral follicle count (AFC) - where all follicles were ≥2 mm in diameter - during the days of the ovulation synchronization protocol for timed artificial insemination (TAI) in dairy cows (n = 20). In the second study we investigated the follicular dynamics and Doppler ultrasonography in cows with low (≤15 follicles, n = 9) and high (≥25 follicles, n = 9) AFC, and measured progesterone (P4) concentrations during CL evaluation. In addition, the diameter of the preovulatory follicle, area of blood flow of the preovulatory follicle, CL area, and CL blood flow were compared between groups with high and low AFC. Ultrasound examinations were performed during the days of the protocol and 10 days after ovulation to assess the CL. The constancy of the AFC was analyzed by calculating the repeatability. Parametric variables were analyzed using the t-test, and nonparametric variables were analyzed using the Mann-Whitney test (P ≤ 0.05). The repeatability of the AFC on different days of the protocol was 0.98. Cows with low AFC showed a greater diameter of the preovulatory follicle (16 ± 0.3 vs. 15 ± 0.4 mm), blood flow area of the preovulatory follicle (17.3 ± 2.3 vs. 8.1 ± 3.2 mm2), CL area (579.1 ± 16.9 vs. 405.8 ± 21.2 mm2), area of CL perfusion (97.1 ± 9.4 vs. 68.3 ± 5.2 mm2), as well as higher P4 levels (3.1 ± 0.2 vs. 2.2 ± 0.2 ng/mL). In high milk-producing Holstein cows, the AFC has high repeatability on different days of the TAI protocol, and cows with a low AFC show larger preovulatory follicles and CLs with greater perfusion, in addition to greater P4 concentrations in comparison to those cows with a high AFC.
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Affiliation(s)
- D V Bonato
- State University of Londrina (UEL), Laboratory of Animal Reproduction, Londrina, PR, Brazil; UNIPAR Universidade Paranaense, Umuarama, PR, 87502-210, Brazil
| | - E B Ferreira
- State University of Londrina (UEL), Laboratory of Animal Reproduction, Londrina, PR, Brazil; Recanto das Paineiras-Arapoti-PR, Brazil
| | - D N Gomes
- Recanto das Paineiras-Arapoti-PR, Brazil
| | - F G C Bonato
- State University of Londrina (UEL), Laboratory of Animal Reproduction, Londrina, PR, Brazil
| | - R G Droher
- State University of Londrina (UEL), Laboratory of Animal Reproduction, Londrina, PR, Brazil
| | - F Morotti
- State University of Londrina (UEL), Laboratory of Animal Reproduction, Londrina, PR, Brazil
| | - M M Seneda
- State University of Londrina (UEL), Laboratory of Animal Reproduction, Londrina, PR, Brazil; National Institute of Science and Technology for Dairy Production Chain (INCT-LEITE), Londrina, PR, 8057-970, Brazil.
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Cerezetti MB, González SM, Ferraz CR, Verri WA, Rabelo EA, Seneda MM, Morotti F. Impact of the antioxidant quercetin on morphological integrity and follicular development in the in vitro culture of Bos indicus female ovarian fragments. In Vitro Cell Dev Biol Anim 2021; 57:856-864. [PMID: 34748153 DOI: 10.1007/s11626-021-00629-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 10/17/2021] [Indexed: 11/26/2022]
Abstract
We evaluated the effect of quercetin on the in vitro culture of bovine ovarian fragments in relation to morphology, development, and oxidative stress. Ovaries (n = 12) from Nelore heifers (n = 6) were used. Each pair of ovaries was divided into nine fragments, and one fragment from each animal was fixed in Bouin solution for 24 h (histology control) or frozen (- 80°C; control for oxidative stress). Other ovarian fragments (n = 8) were distributed into concentrations of 0, 10, 25, and 50 μg/mL of quercetin added to the culture medium for 5 or 10 d. Data were analyzed by chi-square test or ANOVA followed by Tukey's test (P < 0.05). Treatment with 25 μg/mL quercetin resulted in the highest proportion of total intact follicles for 5 (67.3%) and 10 d (57.1%); the concentration of 25 μg/mL also presented the best proportion of developing follicles for 5 d (68.7%) and 10 d (62.8%). Treatment with 25 μg/mL quercetin resulted in significant ferric reduction for 10 d of culture, but not for 5 d. No difference (P > 0.1) was observed in the production of reactive oxygen species or in the oxidative degradation of lipids between treatments and non-cultivated controls. Treatment with 25 μg/mL quercetin preserved the morphological integrity of the developing follicles for 5 and 10 d of culture, in addition to promoting the best antioxidant potential after 10 d of culture in bovine ovarian fragments.
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Affiliation(s)
- Marcela Bortoletto Cerezetti
- Laboratory of Animal Reproduction (REPROA), State University of Londrina (UEL), Londrina, PR, Brazil
- Professional Master's in Veterinary Clinics, Laboratório de Biotecnologia da Reprodução Animal (REPROA), DCV, CCA, State University of Londrina (UEL), Londrina, PR, Cep: 86057-970, Brazil
| | - Suellen Miguez González
- Laboratory of Animal Reproduction (REPROA), State University of Londrina (UEL), Londrina, PR, Brazil
| | - Camila Rodrigues Ferraz
- Department of Pathology, Biological Sciences Center (CCB), State University of Londrina (UEL), Londrina, PR, Brazil
| | - Waldiceu Aparecido Verri
- Department of Pathology, Biological Sciences Center (CCB), State University of Londrina (UEL), Londrina, PR, Brazil
| | | | - Marcelo Marcondes Seneda
- Laboratory of Animal Reproduction (REPROA), State University of Londrina (UEL), Londrina, PR, Brazil
| | - Fábio Morotti
- Laboratory of Animal Reproduction (REPROA), State University of Londrina (UEL), Londrina, PR, Brazil.
- Professional Master's in Veterinary Clinics, Laboratório de Biotecnologia da Reprodução Animal (REPROA), DCV, CCA, State University of Londrina (UEL), Londrina, PR, Cep: 86057-970, Brazil.
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Rosa CO, Costa CB, de Lima CB, da Silva CB, Zangirolamo AF, Ferreira CR, Seneda MM. Lipid profile of in vitro embryos produced from Bos indicus cows with low and high antral follicle counts. Livest Sci 2021. [DOI: 10.1016/j.livsci.2021.104586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Claus LAM, Barca Junior FA, Junior CK, Pereira GR, Fávaro PDC, Ferreira FP, Galdioli VHG, Seneda MM, Ribeiro ELDA. Testicular shape, scrotal skin thickness and testicular artery blood flow changes in bulls of different ages. Reprod Domest Anim 2021; 56:1034-1039. [PMID: 33932236 DOI: 10.1111/rda.13947] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 04/27/2021] [Indexed: 11/28/2022]
Abstract
The aim of this study was to compare the biometric testicular characteristics, skin thickness and haemodynamics of the testicular artery of 12- and 24-month-old bulls using Doppler ultrasonography, the study was conducted using 48 indicus-taurus animals. The scrotal circumference (SC) and biometry characteristics of the bulls were measured to calculate the testicular volume. Doppler ultrasonography was used to obtain the haemodynamic values of the testicular artery. The skin thickness and volume were lower (p<.01) in the younger bulls (12 months:4.68 ± 0.68 mm; 168.76 ± 47.96 cm3 ) versus 24 months (5.05 ± 0.89; 499.73 ± 129.24 cm3 ) animals (p<.01). During diastole, mean velocity was lower in the 12 months (7.98 ± 3.83) than in the 24 months (11.37 ± 4.15) animals (p <.05). The 12-month-old animals had higher pulsatility and resistivity indices (0.49 ± 0.02; 0.51 ± 0.20) compared to the 24-month-old animals (0.32 ± 0.16; 0.40 ± 0.15) (p < .05). The final testicular end velocity was lower in animals with long/moderate-shaped (L/M) (7.31 ± 2.91) than in those moderate/oval-shaped (M/O) (11.48 ± 3.88) testicles (p < .05). Animals with L/M testes presented higher pulsatility values and resistivity indices (0.51 ± 0.05; 0.55 ± 0.04) compared to animals with M/O shape (0.29 ± 0.20; 0.36 ± 0.15). We showed that the blood flow of the supra testicular artery between the two evaluated ages differed, and that 24-month-old bulls presented better thermoregulation capacity. Animals with a long/moderate testicular format presented a greater vascular resistance, which was imposed on the blood flow due to the anatomical differences in the testicular artery, resulting in lower velocity, and indicating better heat dissipation in this format.
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Affiliation(s)
| | - Flávio Antônio Barca Junior
- Animal Production Laboratory, Animal College of Veterinary Medicine, University of Northern Paraná, Arapongas, Paraná, Brazil.,REPROA - Animal Reproduction Laboratory, Deparment of Animal Science, State University of Londrina, Londrina, Paraná, Brazil
| | - Celso Koetz Junior
- Animal Production Laboratory, Animal College of Veterinary Medicine, University of Northern Paraná, Arapongas, Paraná, Brazil
| | - Gabriel Ribas Pereira
- Animal Production Laboratory, Animal College of Veterinary Medicine, University of Northern Paraná, Arapongas, Paraná, Brazil
| | - Patrícia da Cruz Fávaro
- Animal Production Laboratory, Animal College of Veterinary Medicine, University of Northern Paraná, Arapongas, Paraná, Brazil
| | - Fabio Procópio Ferreira
- Animal Production Laboratory, Animal College of Veterinary Medicine, University of Northern Paraná, Arapongas, Paraná, Brazil
| | - Victor Hugo Gonçalves Galdioli
- Animal Production Laboratory, Animal College of Veterinary Medicine, University of Northern Paraná, Arapongas, Paraná, Brazil
| | - Marcelo Marcondes Seneda
- REPROA - Animal Reproduction Laboratory, Deparment of Animal Science, State University of Londrina, Londrina, Paraná, Brazil
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Marsico TV, Sales JNDS, Ferreira CR, Sudano MJ, Viana JHM, Camargo LSDA, Eberlin MN, Seneda MM, Baruselli PS. Characteristic MALDI-MS lipid profiles of Gir, Holstein and crossbred (Gir x Holstein) oocytes recovered by ovum pick-up. Livest Sci 2021. [DOI: 10.1016/j.livsci.2020.104380] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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de Lima MA, Morotti F, Bayeux BM, de Rezende RG, Botigelli RC, De Bem THC, Fontes PK, Nogueira MFG, Meirelles FV, Baruselli PS, da Silveira JC, Perecin F, Seneda MM. Ovarian follicular dynamics, progesterone concentrations, pregnancy rates and transcriptional patterns in Bos indicus females with a high or low antral follicle count. Sci Rep 2020; 10:19557. [PMID: 33177637 PMCID: PMC7658257 DOI: 10.1038/s41598-020-76601-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 09/02/2020] [Indexed: 11/22/2022] Open
Abstract
We evaluated the effect of the antral follicle count (AFC) on ovarian follicular dynamics, pregnancy rates, progesterone concentrations, and transcriptional patterns of genes in Nelore cattle (Bos taurus indicus) after a timed artificial insemination (TAI) programme. Cows were separated based on the AFC, and those with a high AFC showed a larger (P < 0.0001) ovarian diameter and area than those with a very low AFC. Females with a very low AFC exhibited a larger (P < 0.01) diameter of the dominant follicle at TAI (13.6 ± 0.3 vs. 12.2 ± 0.4 mm) and a tendency (P = 0.06) to have different serum progesterone concentrations (2.9 ± 0.3 vs. 2.1 ± 0.3 ng/mL; on day 18, considering day 0 as the beginning of the synchronization protocol) than those with a high AFC. The pregnancy rate was higher (P ≤ 0.05) in animals with a very low (57.9%) and low (53.1%) AFC than in those with a high AFC (45.2%). The expression of genes related to intercellular communication, meiotic control, epigenetic modulation, cell division, follicular growth, cell maintenance, steroidogenesis and cellular stress response was assessed on day 5. In females with a low AFC, 8 and 21 genes in oocytes and cumulus cells, respectively, were upregulated (P < 0.05), while 3 and 6 genes in oocytes and cumulus cells, respectively, were downregulated. The results described here will help elucidate the differences in ovarian physiology and the reproductive success of Bos indicus females with a low or high AFC.
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Affiliation(s)
| | - Fábio Morotti
- Animal Reproduction and Biotechnology Laboratory, State University of Londrina-UEL, Londrina, PR, Brazil.
- Laboratório de Reprodução Animal, DCV, CCA, UEL, Cx. Postal: 10.011, Londrina, PR, Cep: 86057-970, Brazil.
| | | | | | | | | | | | | | | | | | | | - Felipe Perecin
- Department of Veterinary Medicine, FZEA/USP, Pirassununga, SP, Brazil
| | - Marcelo Marcondes Seneda
- Animal Reproduction and Biotechnology Laboratory, State University of Londrina-UEL, Londrina, PR, Brazil
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Fávaro PDC, Pereira GR, Barca FA, Adona PR, Franco EMV, Dias IDS, Seneda MM, Koetz Junior C. Hemodynamic evaluation of the supratesticular artery in bulls. Livest Sci 2020. [DOI: 10.1016/j.livsci.2020.104210] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
Among the reproductive biotechnologies, in vitro embryo production (IVEP) is an important tool for multiplying genetic material of superior merit. Recently, the number of embryos produced and transferred in vitro became significantly higher than that produced in vivo worldwide. In this context, the enhancement was attributable to ovum pick-up (OPU). With the advent of genomic technology, shortened breeding intervals, and increased selection accuracy, IVEP has attracted increasing attention for commercial use. The IVEP technique is well-established, but the embryo production rate has reached a plateau at 30-40%. Despite constant advances, the OPU/IVEP programs face some challenges that hinder the efficient application of the technique. Previous studies have shown that the quantity and quality of aspirated oocytes are essential factors for successful IVEP. This paper presents a brief overview of alternatives that can be employed to improve the process-seeking methods that assist in the recovery of better-quality oocytes and higher competence in OPU to improve embryo production. These strategies include using follicular wave synchronization prior to OPU, employing the influence of antral follicle populations, using the pre-OPU gonadotrophic stimulus and applying non-hormonal methods for selecting female donors.
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Affiliation(s)
- Marcelo Marcondes Seneda
- Universidade Estadual de Londrina, Laboratório de Reprodução Animal, DCV-CCA-UEL, Londrina, Parana, Brazil; National Institute of Science and Technology for Dairy Production Chain (INCT-LEITE), Universidade Estadual de Londrina, Rodovia Celso Garcia Cid-Campus Universitário, PO Box 10011, Londrina, Parana, 86057-970, Brazil.
| | - Amanda Fonseca Zangirolamo
- Universidade Estadual de Londrina, Laboratório de Reprodução Animal, DCV-CCA-UEL, Londrina, Parana, Brazil; National Institute of Science and Technology for Dairy Production Chain (INCT-LEITE), Universidade Estadual de Londrina, Rodovia Celso Garcia Cid-Campus Universitário, PO Box 10011, Londrina, Parana, 86057-970, Brazil
| | - Larissa Zamparone Bergamo
- Universidade Estadual de Londrina, Laboratório de Reprodução Animal, DCV-CCA-UEL, Londrina, Parana, Brazil
| | - Fábio Morotti
- Universidade Estadual de Londrina, Laboratório de Reprodução Animal, DCV-CCA-UEL, Londrina, Parana, Brazil
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Goncalves GR, Morotti F, Colombo AHB, Bonato DV, Bizarro-Silva C, Rosa CO, Cavalieri FLB, Seneda MM. Influence of age and ovarian antral follicle count on the reproductive characteristics of embryo donor mares. Vet Rec 2020; 186:564. [PMID: 31896722 DOI: 10.1136/vr.105526] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 10/11/2019] [Accepted: 11/29/2019] [Indexed: 11/03/2022]
Abstract
BACKGROUND Age and antral follicle count (AFC) are related to fertility in cattle, but this information remains limited in mares. METHODS To verify the influence of age and AFC on the reproductive characteristics of mares, 15 Quarter Horse donors, with 5-15 antral follicles, ranging from three to 17 years old, healthy and in good nutritional status, were divided into groups with low AFC (≤9 follicles) or high AFC (≥10 follicles) and mares considered young (≤9 years) or old (≥10 years). Mares were submitted to ultrasonography to determine the dominant follicle diameter, follicular growth rate, degree of uterine oedema and embryonic recovery for a minimum of three oestrous cycles. RESULTS AFC was higher (P=0.001) in young mares compared with old mares. An interaction (P=0.001) between AFC and age was observed with regard to follicular growth rate, being that mares with low AFC and are old showed the lowest follicular growth compared with those of low AFC and young, high AFC and old, and high AFC and young. Younger mares and those with high AFC exhibited higher degree of uterine oedema (P<0.05) on the third day of oestrus compared with older mares and with low AFC (3 and 2, respectively). However, in both groups, the degree of oedema reduced by the time of ovulation. CONCLUSION Follicular growth rate, degree of uterine oedema and the number of antral follicles are higher in young mares with high AFC. However, the rate of embryonic recovery is not influenced by donors' age or AFC.
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Affiliation(s)
- Gustavo Romero Goncalves
- Department of Veterinary Clinics, State University of Londrina, Londrina, Parana, Brazil.,Department of Veterinary Medicine, Inga University Center - UNINGÁ, Maringa, Parana, Brazil
| | - Fábio Morotti
- Department of Veterinary Clinics, State University of Londrina, Londrina, Parana, Brazil
| | | | - Denis Vinicius Bonato
- Department of Veterinary Clinics, State University of Londrina, Londrina, Parana, Brazil
| | - Camila Bizarro-Silva
- Department of Veterinary Clinics, State University of Londrina, Londrina, Parana, Brazil
| | - Camila Oliveira Rosa
- Department of Veterinary Clinics, State University of Londrina, Londrina, Parana, Brazil
| | - Fábio Luiz Bim Cavalieri
- Department of Veterinary Medicine, High Education Center of Maringa - CESUMAR, Maringa, Parana, Brazil
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Abstract
The number of embryos produced by in vitro fertilization (IVF) has grown exponentially in recent years. Recently, for the first time, the number of embryos produced and transferred in vitro was significantly higher than the number developed in vivo worldwide. In this context, a particular boost occurred with ovum pick-up (OPU) and in vitro embryos produced in North America, and this technology is becoming more prominent for commercial dairy farms. However, despite many advances in recent decades, laboratories and companies are looking for methods and alternatives that can be used in collaboration with the existing process to improve it. Among the strategies used to improve the dairy industry are the use of genomic analysis for the selection of animals with desired traits or as an evaluation tool of oocyte and embryo quality, the optimization of the collection and use of gametes from prepubertal females and males, the effective use of sexed semen, and improvements in culture media and methods of embryo cryopreservation. Thus, this review aims to discuss the highlights of the commercial use of IVF and some strategies to increase the application of this technique in large-scale dairy programs.
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Affiliation(s)
| | - Amanda Fonseca Zangirolamo
- Universidade Estadual de Londrina, Laboratório de Reprodução Animal, DCV-CCA-UEL, Londrina, Parana, Brazil.
- National Institute of Science and Technology for Dairy Production Chain (INCT–LEITE), Universidade Estadual de Londrina, Rodovia Celso Garcia Cid-Campus Universitário, Parana, Brazil.
| | - Marcelo Marcondes Seneda
- Universidade Estadual de Londrina, Laboratório de Reprodução Animal, DCV-CCA-UEL, Londrina, Parana, Brazil.
- National Institute of Science and Technology for Dairy Production Chain (INCT–LEITE), Universidade Estadual de Londrina, Rodovia Celso Garcia Cid-Campus Universitário, Parana, Brazil.
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Favaro PDC, Pereira GR, Barca Jr. FA, Seneda MM, Alves Assunção AC, Da Silva ID, Victalina Franco EM, Gonçalves Galdioli VH, Kotz Jr. C. Evaluation of Scrotal Temperature in Different Testicular Shapes by Infrared Thermography in Braford Bulls. ACTA SCI VET 2019. [DOI: 10.22456/1679-9216.96113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Background: The mechanisms of testicular thermoregulation may influence the blood flow provided by the testicular artery, where the proper blood supply to the testicle is crucial for promotingspermatogenesis and reproductive function in bulls. The size and shape of the testicles are determined by genetic mechanisms and environmental effects. A better understanding of the relationships between the anatomical characteristics of the testicles and scrotum can support a better reproductive assessment. The purpose of the current study was to evaluate the testicular temperature of different scrotal shapes using infrared thermography in bulls.Materials, Methods & Results: We evaluated 132 Braford bulls with an average age of 24 months. The evaluation of breeding bull semen was performed prior to the beginning of the experiment. Then, animals were selected on the basis of the size of their testes, which was determined by dividing the average width by the average length. The scrotal circumference was measured with a millimeter tape positioned around the largest circumference. Testicular and ocular temperature measurements and analysis were conducted using an infrared thermal camera, Flir T440 with emissivity of 0.98 and thermal sensitivity of 0.05°C. Testicular scrotum temperature and testicular shape were analyzed with one-way ANOVA using Minitab 16, and values of P < 0.05 were considered statistically significant. We observed that 67.42% of testicle shapes were long-oval, and 32.58% were long-moderate. The testicular temperature was higher in bulls with the long-moderate shape compared to those with the long-oval shape (P < 0.05). The mean length was higher in long-moderate shaped testicles compared to those of the long-oval shape (P < 0.01). There was no significant differences in rectal and ocular temperatures or in scrotal circumference between bulls with long-moderate and long-oval shapes (P > 0.05). In addition, the mean width was lower in testicles of long-moderate shape compared to those of the long-oval scrotal format (P < 0.01).Discussion: The results obtained showed that Braford bulls with the long-moderate testicular shape have a higher testicular temperature to maintain proper thermoregulation. The present study demonstrated that IRT can be used to evaluate the testicular temperature in animals with different scrotal conformations. In this study, Braford bulls showed lower length and width values for animals having long-moderate (9.21 and 5.22, respectively) and long-oval formats (8.56 and 5.56, respectively). In contrast, previous reports examining Nellore bulls between the ages of 17-20 months found a predominance of the long oval shape followed by the long-moderate shape, which indicates a change in testicular shape as age progresses, resulting in a rounder testicular shape. Perhaps other factors, such as the external cremaster muscle and tunica dartos, cause the testicles to be retracted towards the body at lower temperatures while at high temperatures, relaxation occurs. The prevailing testicular shape in Braford animals with a mean age of 24 months was the long-moderate shape. Thus, testicles with a larger surface area will have lower temperatures because they can dissipate heat more easily than testicles with lower surface area. The results suggest that the long-moderate scrotum format may influence the testicular temperature in mature Braford bulls.
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Costa CB, Lunardelli PA, Fontes PK, Sudano MJ, Gouveia Nogueira MF, Alfieri AA, Ferreira CR, de Lima CB, Marinho LSR, Seneda MM. Influence of cAMP modulator supplementation of in vitro culture medium on Bos taurus indicus embryos. Theriogenology 2019; 141:134-141. [PMID: 31541782 DOI: 10.1016/j.theriogenology.2019.09.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 08/20/2019] [Accepted: 09/05/2019] [Indexed: 01/04/2023]
Abstract
The effectiveness of the use of natriuretic peptide C (NPPC) in the blocking of meiosis has already been proven in several species. However, there are no reports on the use of NPPC in the activation of metabolic processes in embryos. Whereas modulations of cAMP concentrations alter the lipid metabolism of bovine oocytes, the present study aims to evaluate the effect of NPPC on the development, lipid content and transcript levels of genes related to lipid metabolism of IVP bovine embryos. For this purpose, ovaries were obtained from a slaughterhouse, and oocytes were fertilized in vitro (D0). From D5 of in vitro culture, embryos were treated with 100 nM NPPC (NPPC group) or with no NPPC (Control group) and evaluated in terms of Blastocyst (D7) and hatching rates (D10). For the assessment of the cytoplasmatic lipid amounts, blastocysts were stained with Sudan Black B dye. The embryonic lipid profile was investigated by electrospray ionization desorption-mass spectrometry (DESI-MS). The abundance of nine transcripts related to lipid metabolism were assessed using the Biomark HD system. For statistical analysis, blastocyst and hatching rates, lipid content by the Sudan Black B and variation of gene expression between groups were compared by Student t-test. For lipid profile analysis, principal component analysis (PCA) and fold-change were performed. The embryo lipid content was similar between NPPC (881 ± 3.7) and Control (883 ± 5.2) groups (p > 0.05). However, cholesteryl esters and TAGs were downregulated by NPPC at multiple levels according to the DESI-MS profiles. Of the analyzed genes, ELOVL6 and SREBF1 showed an up-regulation in the control group (p < 0.05), while CPT2 was observed to be up-regulated in the NPPC-treated embryos. There was no significant difference in the blastocyst production rate between NPPC (44.4%) and Control (42.4%), however the hatching rate at D10 was higher (p < 0.05) in the NPPC group (69.77%) when compared to the Control group (48.33%). These findings demonstrate that NPPC alters the mRNA expression of genes related to lipid metabolism and that it exerts a positive effect on the hatching rates of IVP Bos taurus indicus embryos.
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Affiliation(s)
| | | | - Patricia Kubo Fontes
- São Paulo State University (Unesp), Institute of Biosciences, Department of Pharmacology, Botucatu, SP, Brazil
| | - Mateus José Sudano
- Center for Natural and Human Sciences, University ABC Federal, Santo André, SP, Brazil
| | - Marcelo Fábio Gouveia Nogueira
- São Paulo State University (Unesp), Institute of Biosciences, Department of Pharmacology, Botucatu, SP, Brazil; São Paulo State University (UNESP), School of Sciences, Humanities and Languages, Department of Biological Science, Assis, SP, Brazil
| | - Amauri Alcindo Alfieri
- Laboratório de Virologia Animal, Departamento de Medicina Veterinária Preventiva, Universidade Estadual de Londrina, Londrina, PR, Brazil
| | | | - Camila Bruna de Lima
- Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, SP, Brazil; Centro de Ciências Naturais e Humanas, Universidade Federal Do ABC, Santo André, SP, Brazil
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Cerezetti MB, Bergamo LZ, Costa CB, Da Silva CB, Seneda MM. ALTERNATIVAS PARA SUBSTITUIÇÃO DO USO DE IMPLANTES VAGINAIS DE PROGESTERONA NA INSEMINAÇÃO ARTIFICIAL EM TEMPO FIXO EM BOVINOS. ACTA ACUST UNITED AC 2019. [DOI: 10.4025/revcivet.v6i2.44851] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A progesterona (P4) é um dos principais hormônios responsáveis pela ciclicidade reprodutiva e atua na manutenção da gestação em vacas. Esse hormônio caracteriza-se pela rápida metabolização, o que leva a necessidade de disponibilizá-lo de forma lenta a fim de mimetizar sua liberação fisiológica. Diferentes dispositivos de liberação dos progestágenos associados à aplicação de ésteres de estrógeno são utilizados com frequência em protocolos para sincronizar as ondas foliculares e ovulação. Entre os dispositivos liberadores de progestágenos, o mais utilizado é o intravaginal, sendo disponíveis outras alternativas de dispositivos como o auricular, oral, injetável e o adesivo transdérmico. Dessa forma, conhecer as alternativas de implantes de P4 é importante para garantir a eficiência dos protocolos reprodutivos, assim como o bem-estar animal e o desenvolvimento de novos dispositivos de P4. O objetivo dessa revisão é descrever as principais alternativas de implantes de progesterona utilizados na inseminação artificial em tempo fixo (IATF) bem como suas vantagens e desvantagens.
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Claus LAM, Barca Junior FA, Koetz Junior C, Pereira GR, Fávaro PDC, Galdioli VHG, Seneda MM, Ribeiro ELDA. Scrotal skin thickness, testicular shape and vascular perfusion using Doppler ultrasonography in bulls. Livest Sci 2019. [DOI: 10.1016/j.livsci.2019.06.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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de Moraes FLZ, Morotti F, Costa CB, Lunardelli PA, Seneda MM. Relationships between antral follicle count, body condition, and pregnancy rates after timed-AI in Bos indicus cattle. Theriogenology 2019; 136:10-14. [PMID: 31234052 DOI: 10.1016/j.theriogenology.2019.06.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 06/09/2019] [Accepted: 06/10/2019] [Indexed: 10/26/2022]
Abstract
An experiment was performed to evaluate the association between the antral follicle count (AFC) plus body condition score (BCS) and the pregnancy rate in Bos indicus undergoing timed artificial insemination (TAI). A total of 736 Nelore cows with BCSs ranging from 2 to 4 received a conventional protocol for TAI. On a random day of the estrous cycle (Day 0), all cows received an intravaginal P4 device and an intramuscular (i.m.) injection of 2.0 mg estradiol benzoate. On Day 8, the P4 device was removed, and 150 μg sodium D-cloprostenol, 300 IU equine chorionic gonadotrophin and 1.0 mg estradiol cypionate were administered by i.m. injection. TAI was performed 48 h after P4 device removal, and pregnancy diagnosis was performed by ultrasonography after 30 days. On Day 0, all cows were examined by ultrasonography to determine the AFC by counting the number of follicles >3 mm in diameter that were present in both ovaries and to evaluate the BCS (scale of 1-5). The cows were then classified based on their AFCs as those with low (≤10 follicles), intermediate (11-29 follicles) and high AFC (≥30 follicles). Furthermore, cows were classified as having low (≥2.0 to ≤ 2.9) and high (≥3.0 to ≤ 4.0) BCSs. The AFCs and BCSs were analyzed using the generalized linear model, and the pregnancy rate was assessed with the binary logistic regression model (P ≤ 0.05). The pregnancy rate was influenced (P < 0.05) by AFC and BCS classification and by interactions (P = 0.034) between these factors. Cows with a low AFC exhibited higher a pregnancy rate than did cows with a high or an intermediate AFC (57.7% a, 47.9% b and 49.7% b, P = 0.008). Low BCS resulted in a higher pregnancy rate than did high BCS (55.2% vs. 50.4%, P = 0.008). Cows with a high BCS and a low AFC had a higher pregnancy rate (P < 0.05) than did those with a high BCS and an intermediate or a high AFC (59.8%a, 48.0%b, and 38.0%b, respectively). An interaction (P < 0.05) was observed between the AFC and BCS, and the pregnancy rate decreased significantly in cows with an AFC > 30 and a BCS between 3 and 4. In conclusion, AFC and BCS classifications influence the pregnancy rate of Bos indicus beef cattle subjected to TAI. In addition, an important interaction between these factors was observed, namely, the lowest pregnancy rates were found in cows with high BCSs and high AFCs.
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Affiliation(s)
| | - Fábio Morotti
- University of Londrina (UEL), Laboratory of Animal Reproduction, Londrina, PR, Brazil
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Rosa CO, Bonato DV, Souza AK, Morotti F, Francisco RC, Basso AC, Martins MIM, Seneda MM. Improvement on the efficiency of doses per conception by using a semen extender in timed artificial insemination. Livest Sci 2019. [DOI: 10.1016/j.livsci.2019.01.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Seneda MM, Morotti F, Zangirolamo AF, da Silva NC, Sanches TK, Blaschi W, Barreiros TRR. Antral follicle population in prepubertal and pubertal heifers. Reprod Fertil Dev 2019; 31:10-16. [PMID: 32188538 DOI: 10.1071/rd18344] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The antral follicle count (AFC) is an important tool in the selection of bovine females destined for biotechnology. However, little is known about AFC in prepubertal and pubertal heifers. Some challenges inherent to the physiology of young females must be considered to achieve efficient rates with different procedures, such as ovum pick-up and IVF. This paper covers some important topics about ovarian physiology related to the population of antral follicles and reproductive efficiency in young female cattle.
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Affiliation(s)
- M M Seneda
- Universidade Estadual de Londrina, Laboratório de Reprodução Animal, Departamento de Clínicas Veterinárias - Centro de Ciências Agrárias - Universidade Estadual de Londrina, Londrina, Parana, Brazil
| | - F Morotti
- Universidade Estadual de Londrina, Laboratório de Reprodução Animal, Departamento de Clínicas Veterinárias - Centro de Ciências Agrárias - Universidade Estadual de Londrina, Londrina, Parana, Brazil
| | - A F Zangirolamo
- Universidade Estadual de Londrina, Laboratório de Reprodução Animal, Departamento de Clínicas Veterinárias - Centro de Ciências Agrárias - Universidade Estadual de Londrina, Londrina, Parana, Brazil
| | - N C da Silva
- Universidade Estadual de Londrina, Laboratório de Reprodução Animal, Departamento de Clínicas Veterinárias - Centro de Ciências Agrárias - Universidade Estadual de Londrina, Londrina, Parana, Brazil
| | - T K Sanches
- Universidade Estadual de Londrina, Laboratório de Reprodução Animal, Departamento de Clínicas Veterinárias - Centro de Ciências Agrárias - Universidade Estadual de Londrina, Londrina, Parana, Brazil
| | - W Blaschi
- Universidade Estadual do Norte do Paraná, Laboratório de Biotecnologia da Reprodução Animal, Departamento de Veterinária e Produção Animal, Rodovia BR - 369, Km 54, Vila Maria, Bandeirantes, Parana 86360-000, Brazil
| | - T R R Barreiros
- Universidade Estadual do Norte do Paraná, Laboratório de Biotecnologia da Reprodução Animal, Departamento de Veterinária e Produção Animal, Rodovia BR - 369, Km 54, Vila Maria, Bandeirantes, Parana 86360-000, Brazil
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Emanuelli IP, Costa CB, Rafagnin Marinho LS, Seneda MM, Meirelles FV. Cumulus-oocyte interactions and programmed cell death in bovine embryos produced in vitro. Theriogenology 2018; 126:81-87. [PMID: 30537657 DOI: 10.1016/j.theriogenology.2018.11.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 11/22/2018] [Accepted: 11/25/2018] [Indexed: 10/27/2022]
Abstract
This study investigated the interactions between cumulus cells (CCs) and oocytes and programmed cell death in bovine cumulus-oocyte complexes (COCs) with different morphological characteristics. DNA fragmentation was assessed in CCs at 0 and 24 h of maturation, as well as parthenogenetic developmental competence on the 9th day post-activation, blastocyst quality and BCL-2 and BAX transcript levels in matured CCs. Most immature oocytes in the COC-A group (full cumulus and several compact layers) were in the initial germinal vesicle (iGV) stage, exhibiting minimal or no DNA damage. In contrast, after follicle removal, the COCB (partial cumulus and one or two cell layers) and C (expanded cumulus) groups presented in more advanced GV stages and exhibited DNA fragmentation. After maturation, significant increases in fragmented nuclei were noted in COCC and COCB groups. Embryos resulting from the COC-A developed more rapidly and had increased competence compared to embryos resulting from groups COCB and COCC. The COCB group exhibited the highest BAX protein levels and a reduced BCL-2/BAX protein ratio. The results show a negative correlation between nuclear fragmentation and embryonic development potential in COCs with different morphologies. In addition, a low BCL-2/BAX protein ratio might be associated with an increase in nuclear fragmentation in CCs.
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Affiliation(s)
| | | | | | | | - Flávio Vieira Meirelles
- Laboratory of Molecular Biology, Faculty of Animal Science, University of Sao Paulo, São Paulo, Brazil
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Max MC, Bizarro-Silva C, Búfalo I, González SM, Lindquist AG, Gomes RG, Barreiros TRR, Lisboa LA, Morotti F, Seneda MM. In vitro culture supplementation of EGF for improving the survival of equine preantral follicles. In Vitro Cell Dev Biol Anim 2018; 54:687-691. [PMID: 30284096 DOI: 10.1007/s11626-018-0296-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 09/19/2018] [Indexed: 11/30/2022]
Abstract
Folliculogenesis is a process of development and maturation of the ovarian follicles, being essential for the maintenance of fertility. In in vivo conditions, 99.9% of the follicles of an ovary do not ovulate and undergo atresia. In order to minimize this loss and to clarify the existing mechanisms, a technique was developed that allows for the in vitro follicular development. The objective of this study was to evaluate the effects of different epidermal growth factor (EGF) concentrations on the in vitro culturing of equine preantral follicles. Ovaries (n = 10) were collected from a local slaughterhouse of mares in seasonal anestrus, washed with 70% alcohol and PBS, and transported. The inner portion of the ovary was divided into 11 fragments of approximately 3 × 3 × 1 mm. A fragment of each ovary was immediately fixed in Bouin (control group). The remaining 10 fragments were individually cultured for 2 and 6 d. The medium was supplemented with different concentrations of EGF (0, 10, 50, 100, and 200 ng/mL). After cultivation, the fragments were processed and classified according to the developmental stage and morphology. In total, 1065 slides containing 6105 tissue sections were evaluated. Within 2 d of culture, there was a higher proportion of intact follicles at the EGF concentrations of 0 and 100 ng/mL (p > 0.05). After 6 d of culture, only the EGF concentration of 100 ng/mL demonstrated a difference when compared to the other treatments (0, 10, 50 and 200 ng/mL of EGF, p > 0.05). There was follicular development after 2 d at all EGF concentrations. Thus, we suggest that EGF promotes follicular survival in equines at a concentration of 100 ng/mL in in vitro cultures of ovarian fragments for 2 d. In addition, we suggest that EGF promotes follicular survival in equines at a concentration of 100 ng/mL in situ cultivation.
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Affiliation(s)
- Marilu Constantino Max
- Department of Veterinary Clinical, Laboratory of Animal Reproduction, University of Londrina, Londrina, Parana, Brazil
| | - Camila Bizarro-Silva
- Department of Veterinary Clinical, Laboratory of Animal Reproduction, University of Londrina, Londrina, Parana, Brazil. .,Laboratory Animal Reproduction, DCV, CCA, UEL, Londrina, PR, 86051-990, Cx. Postal: 10.011, Brazil.
| | - Isabela Búfalo
- Department of Veterinary Clinical, Laboratory of Animal Reproduction, University of Londrina, Londrina, Parana, Brazil
| | - Suellen Miguez González
- Department of Veterinary Clinical, Laboratory of Animal Reproduction, University of Londrina, Londrina, Parana, Brazil
| | - Andressa Guidugli Lindquist
- Department of Veterinary Clinical, Laboratory of Animal Reproduction, University of Londrina, Londrina, Parana, Brazil
| | - Roberta Garbelini Gomes
- Department of Veterinary Clinical, Laboratory of Animal Reproduction, University of Londrina, Londrina, Parana, Brazil
| | - Thales Ricardo Rigo Barreiros
- Department of Veterinary and Animal Production, Laboratory of Biotechnology of Animal Reproduction, State University of Northern Parana, Jacarezinho, Parana, Brazil
| | - Lívia Aires Lisboa
- Department of Veterinary Clinical, Laboratory of Animal Reproduction, University of Londrina, Londrina, Parana, Brazil
| | - Fábio Morotti
- Department of Veterinary Clinical, Laboratory of Animal Reproduction, University of Londrina, Londrina, Parana, Brazil
| | - Marcelo Marcondes Seneda
- Department of Veterinary Clinical, Laboratory of Animal Reproduction, University of Londrina, Londrina, Parana, Brazil
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Abstract
The livestock sector has achieved many technological advances, which have resulted in continued
improvements in animal production systems and in the reproductive efficiency of herds. The
associated use of reproductive biotechnology and genetic improvements combined with adequate
sanitary and nutritional management are essential conditions for sustainable intensified
animal production and financial autonomy within farms. Timed artificial insemination (TAI)
represents one of the strategies with the greatest impact of expansion in providing genetic
improvements and increased reproductive efficiency at a decreased cost. Despite the high
proportion of cows receiving TAI, this market still exhibits considerable potential for
expansion. After a TAI procedure, approximately 40 to 60% of females become pregnant. This
result can vary depending on such factors as the hormonal protocol employed, female category,
body condition score, ovarian status, farm management and aspects related to bulls and semen.
The fertility and genetic quality of the bull plays an important role in the herd because a single
bull can influence the entire production system. Another important strategy is the use of
sex-sorted semen associated with TAI, primarily when associated with management practices
to improve the pregnancy rate. This paper presents a review of the intensification of TAI,
supplying practical information regarding the implementation of TAI commercial programs.
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Affiliation(s)
| | - Fábio Morotti
- Laboratório de Reprodução Animal, DCV-CCA-UEL, Londrina, Parana, Brazil
| | - Elis Lorenzetti
- Laboratório de Reprodução Animal, DCV-CCA-UEL, Londrina, Parana, Brazil.,Universidade Norte do Paraná, UNOPAR, Arapongas, Parana, Brazil
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Morotti F, de Campos JT, Lunardelli PA, Costa CB, Bergamo LZ, Barreiros TRR, Dos Santos GMG, Seneda MM. Injectable progesterone in timed artificial insemination programs in beef cows. Anim Reprod 2018; 15:17-22. [PMID: 33365090 PMCID: PMC7746219 DOI: 10.21451/1984-3143-2017-ar928] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
The aims of this study were I) to compare the follicular diameter, corpus luteum diameter and
serum progesterone (P4) concentrations in cows treated with conventional protocol
vs. injectable P4 protocol; II) to determine the serum P4 profile in ovariectomized
heifers; and III) to compare pregnancy rate between protocols. In experiment I, multiparous
cows received a protocol for ovulation synchronization with an intravaginal P4 device (n
= 38; device + EB day 0; device removal + PGF2α + eCG + EC day 8) or injectable P4 (n = 38;
injection + EB day 0; PGF2α + eCG + EC day 8). In experiment II, ovariectomized heifers
(n = 8) were treated with injectable P4 and blood samples were collected to determine the serum
P4 profile. In experiment III, multiparous cows were timed AI with two different P4 approaches,
intravaginal P4 device (n = 48) or injectable P4 (n = 47). In the first experiment, cows treated
with P4 device had higher (P < 0.05) diameter of dominant follicle after ovulation induction
(11.6 ± 1.8 vs.10.3 ± 1.8 mm) and ovulation rate (97%, 37/38
vs. 47.3%, 18/38) than cows treated with injectable P4. But, the follicular
growth daily was higher (P < 0.05) in cows treated with injectable P4 than intravaginal
device (1.3 ± 0.4 vs. 1.0 ± 0.3 mm/day, respectively).
In experiment II, the P4 concentration peak occurred within 48 hours (6.54 ng/mL) and decreased
after 96 hours (P < 0.05) after P4 injection. In experiment III, cows with P4 device had higher
(P < 0.05) pregnancy rate than the injectable P4 group (60.4 vs. 34.0%,
respectively). These results demonstrate that although the intravaginal P4 devices showed
a higher pregnancy rate, a protocol with injectable P4 represents an easier method and a promising
alternative for TAI in cattle.
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Affiliation(s)
- Fábio Morotti
- Laboratory of Animal Reproduction, University of Londrina, Parana,
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Rosa CO, Marinho LSR, da Rosa PRA, De Cesaro MP, Lunardelli PA, Silva-Santos KC, Basso AC, Bordignon V, Seneda MM. Molecular characteristics of granulosa and cumulus cells and oocyte competence in Nelore cows with low and high numbers of antral follicles. Reprod Domest Anim 2018; 53:921-929. [DOI: 10.1111/rda.13189] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 03/06/2018] [Indexed: 12/20/2022]
Affiliation(s)
- CO Rosa
- Department of Veterinary Clinics; Laboratory of Biotechnology the Animal Reproduction-ReproA; State University of Londrina; Londrina Brazil
| | - LSR Marinho
- Department of Veterinary Clinics; Laboratory of Biotechnology the Animal Reproduction-ReproA; State University of Londrina; Londrina Brazil
| | - PRA da Rosa
- Department of Large Animal Clinics; Laboratory of Biotechnology and Animal Reproduction-BioRep; Federal University of Santa Maria; Santa Maria Brazil
| | - MP De Cesaro
- Department of Large Animal Clinics; Laboratory of Biotechnology and Animal Reproduction-BioRep; Federal University of Santa Maria; Santa Maria Brazil
| | | | - KC Silva-Santos
- Department of Veterinary Clinics; Laboratory of Biotechnology the Animal Reproduction-ReproA; State University of Londrina; Londrina Brazil
| | - AC Basso
- In Vitro Brasil LTDA; Mogi Mirim Brazil
| | - V Bordignon
- Department of Animal Science; McGill University; Sainte Anne de Bellevue Canada
| | - MM Seneda
- Department of Veterinary Clinics; Laboratory of Biotechnology the Animal Reproduction-ReproA; State University of Londrina; Londrina Brazil
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Randi F, Fernandez-Fuertes B, McDonald M, Forde N, Kelly AK, Bastos Amorin H, Muniz de Lima E, Morotti F, Marcondes Seneda M, Lonergan P. Asynchronous embryo transfer as a tool to understand embryo-uterine interaction in cattle: is a large conceptus a good thing? Reprod Fertil Dev 2018. [PMID: 26220578 DOI: 10.1071/rd15195] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The aim was to examine the effect of embryo-uterine synchrony on conceptus elongation and pregnancy rate in cattle. In Study 1, crossbred beef heifers each received 10 Day-7 in vitro-produced blastocysts on either Day 5, 7 or 9 after oestrus. A proportion of Day 5 recipients were supplemented with progesterone, via a progesterone-releasing intravaginal device from Days 3-5 plus either 750IU equine chorionic gonadotrophin or 3000IU human chorionic gonadotrophin on Day 3. At embryo age Day 14, all heifers were slaughtered and the uterus was flushed. Fewer recipients yielded conceptuses (P<0.05) and fewer conceptuses were recovered (P<0.05) following transfer on Day 5 compared with Day 7 or 9. Supplementation with progesterone resulted in short cycles in approximately 50% of recipients. Mean conceptus length was greater (P<0.05) following transfer to an advanced uterus. In Study 2, overall pregnancy rate following the fresh transfer of a single in vitro-produced blastocyst was 43.5% (2065/4749). Transfer of a Day 7 embryo to a synchronous Day-7 uterus resulted in a pregnancy rate of 47.3%. Transfer to a Day-5 (40.8%) or a Day-8 (41.3%) uterus moderately impacted pregnancy rate (P<0.01) while transfer to a uterus 2 days in advance (Day-9, 24.4%) or 3 days behind (Day-4, 27.0%) reduced (P<0.001) pregnancy rate compared with synchronous transfers. In conclusion, transfer of an embryo into an advanced uterus results in an acceleration of conceptus development, but does not result in greater pregnancy rates.
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Affiliation(s)
- Federico Randi
- School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, Ireland
| | | | - Michael McDonald
- School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, Ireland
| | - Niamh Forde
- School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, Ireland
| | - Alan K Kelly
- School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, Ireland
| | | | | | - Fabio Morotti
- Laboratório de Biotecnologia da Reprodução Animal (ReproA), DCV-CCA-Universidade Estadual de Londrina (UEL), Londrina, Brazil
| | - Marcelo Marcondes Seneda
- Laboratório de Biotecnologia da Reprodução Animal (ReproA), DCV-CCA-Universidade Estadual de Londrina (UEL), Londrina, Brazil
| | - Patrick Lonergan
- School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, Ireland
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Morotti F, Moretti R, dos Santos GMG, Silva-Santos KC, Ramos Cerqueira PH, Seneda MM. Ovarian follicular dynamics and conception rate in Bos indicus cows with different antral follicle counts subjected to timed artificial insemination. Anim Reprod Sci 2018; 188:170-177. [DOI: 10.1016/j.anireprosci.2017.12.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Revised: 11/24/2017] [Accepted: 12/01/2017] [Indexed: 10/18/2022]
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Cavalieri FLB, Morotti F, Seneda MM, Colombo AHB, Andreazzi MA, Emanuelli IP, Rigolon LP. Improvement of bovine in vitro embryo production by ovarian follicular wave synchronization prior to ovum pick-up. Theriogenology 2017; 117:57-60. [PMID: 29198975 DOI: 10.1016/j.theriogenology.2017.11.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 11/01/2017] [Accepted: 11/21/2017] [Indexed: 10/18/2022]
Abstract
This study evaluated the effects of the synchronization of ovarian follicular wave emergence on the efficiency of in vitro embryo production. Bos indicus cows (n = 20) were divided into two groups (control vs. synchronization) and subjected to repeated ovum pick-up (OPU) sessions (8 replicates each, with an interval of 21 days in a 2 × 2 crossover design) and subsequent in vitro embryo production. Cows in the control group (n = 10) were submitted to OPU procedures without any stimulation every 21 days. Animals in the synchronization group received a protocol-based progesterone implant, estradiol benzoate and prostaglandin on a random day of the estrus cycle (Day 0) and the OPU was performed on Day 5. After in vitro production, embryos were transferred to recipients synchronized at a fixed time and the diagnosis was performed 60 days later. An evaluation of the parameters for each OPU session revealed that donors that received the synchronization protocol pre-OPU showed a greater number of embryos (5.9 ± 0.5 vs. 4.5 ± 0.4; P = 0.037), higher rate of embryo production (45.8% vs. 38.5%; P = 0.001) and higher mean number of conceptions per group (2.2 ± 0.2 vs. 1.6 ± 0.2; P = 0.07) in relation to the group that did not receive hormonal treatment. We concluded that synchronization of the follicular wave prior to OPU showed positive effects on in vitro embryo production as well as on pregnancy rates.
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Affiliation(s)
- F L B Cavalieri
- Laboratory of Animal Reproduction, Unicesumar, ICETI, Maringa, Parana, Brazil
| | - F Morotti
- Laboratory of Animal Reproduction, University of Londrina, Parana, Brazil
| | - M M Seneda
- Laboratory of Animal Reproduction, University of Londrina, Parana, Brazil.
| | - A H B Colombo
- Laboratory of Animal Reproduction, Unicesumar, ICETI, Maringa, Parana, Brazil
| | - M A Andreazzi
- Laboratory of Animal Reproduction, Unicesumar, ICETI, Maringa, Parana, Brazil
| | - I P Emanuelli
- Laboratory of Animal Reproduction, Unicesumar, ICETI, Maringa, Parana, Brazil
| | - L P Rigolon
- Laboratory of Animal Reproduction, University of Maringa, Parana, Brazil
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Zangirolamo AF, da Silva NC, Búfalo I, Seneda MM. Challenges in biotechnology of reproduction in dairy cattle: the antral follicle counting as a fertility parameter. SPERMOVA 2017. [DOI: 10.18548/aspe/0005.01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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40
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Max MC, Silva CB, González SM, Lindquist AG, Búfalo I, Gomes RG, Morotti F, Costa CB, Barreiros T, Lisboa LA, Seneda MM. The development and integrity of equine pre-antral follicles cultured in vitro with follicle-stimulating hormone (FSH) supplementation. Reprod Domest Anim 2017; 52:899-904. [PMID: 28580717 DOI: 10.1111/rda.12996] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 04/13/2017] [Indexed: 01/01/2023]
Abstract
This study investigated the effects of different concentrations of FSH (10, 50, 100 and 200 ng/ml) in supplemented MEM+ on the development of equine pre-antral follicles that were cultured in vitro for 2 or 6 days. The ovaries (n = 5) from mares in seasonal anoestrus were collected from a local abattoir. Ten ovarian tissue fragments of approximately 3 × 3 × 1 mm were obtained from each animal. The fragments were cultured in situ for 2 days (D2) or 6 days (D6) in MEM+ or MEM+ supplemented with FSH at four different concentrations, establishing the following 11 groups: control (D0); MEM + (D2); MEM + (D6); MEM + 10 ng/ml of FSH (D2); MEM + 10 ng/ml of FSH (D6); MEM + 50 ng/ml of FSH (D2); MEM + 50 ng/ml of FSH (D6); MEM + 100 ng/ml of FSH (D2); MEM + 100 ng/ml of FSH (D6); MEM + 200 ng/ml of FSH (D2); and MEM + 200 ng/ml of FSH (D6). Follicles were observed in only 9.65% (388 of 4,018) of the histological sections. Of the 861 follicles evaluated, 488 were in the primordial stage, and 373 were in various developmental stages; 59.7% were morphologically normal. Regarding the integrity of the pre-antral follicles, the groups with 100 ng/ml FSH of 2-days culture as well as 50, 100 and 200 ng/ml FSH of 6-days culture provided the best results. In conclusion, the in vitro culture of abattoir-derived equine ovarian fragments presented better morphological integrity when supplemented with FSH for 6 days, in comparison with the MEM culture group. However, no clear effects were observed with FSH regarding the promotion of activation from a primordial to a developing follicle.
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Affiliation(s)
- M C Max
- Laboratory of Animal Reproduction, University of Londrina, Londrina, PR, Brazil
| | - C B Silva
- Laboratory of Animal Reproduction, University of Londrina, Londrina, PR, Brazil
| | - S M González
- Laboratory of Animal Reproduction, University of Londrina, Londrina, PR, Brazil
| | - A G Lindquist
- Laboratory of Animal Reproduction, University of Londrina, Londrina, PR, Brazil
| | - I Búfalo
- Laboratory of Animal Reproduction, University of Londrina, Londrina, PR, Brazil
| | - R G Gomes
- Laboratory of Animal Reproduction, University of Londrina, Londrina, PR, Brazil
| | - F Morotti
- Laboratory of Animal Reproduction, University of Londrina, Londrina, PR, Brazil
| | - C B Costa
- Laboratory of Animal Reproduction, University of Londrina, Londrina, PR, Brazil
| | - Trr Barreiros
- Laboratory of Biotechnology of Animal Reproduction, UENP, Bandeirantes, PR, Brazil
| | - L A Lisboa
- Laboratory of Animal Reproduction, University of Londrina, Londrina, PR, Brazil
| | - M M Seneda
- Laboratory of Animal Reproduction, University of Londrina, Londrina, PR, Brazil
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Machado FZ, Bergamo LZ, Bizarro-Silva C, Morotti F, Silva-Santos KC, Seneda MM. Cell proliferation in ovarian follicles from Bos taurus indicus females with different antral follicle count. Anim Reprod 2017. [DOI: 10.21451/1984-3143-ar929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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42
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Pellegrino CAG, Morotti F, Untura RM, Pontes JHF, Pellegrino MFO, Campolina JP, Seneda MM, Barbosa FA, Henry M. Use of sexed sorted semen for fixed-time artificial insemination or fixed-time embryo transfer of in vitro-produced embryos in cattle. Theriogenology 2016; 86:888-93. [PMID: 27068357 DOI: 10.1016/j.theriogenology.2016.03.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2015] [Revised: 02/29/2016] [Accepted: 03/08/2016] [Indexed: 01/06/2023]
Abstract
Artificial insemination and in vitro embryo production are powerful tools for disseminating superior genetic qualities and improving the reproductive performance of dairy and beef cattle. In conjunction with these biotechnologies, sexed-sorted semen has been used to obtain offspring of a predetermined sex. This study compared the pregnancy rates obtained using in vitro fertilization/timed embryo transfer (IVF/TET) and timed artificial insemination (TAI), both performed using sexed-sorted (Y-chromosome-bearing) semen obtained from the same bull. For the in vitro embryo production, the ovaries of 250 Nelore cows with known histories were collected in the slaughterhouse and used for IVF. After evaluation of the recipients (IVF/TET group; n = 974), the resultant embryos were transferred to the females with corpus luteum (n = 822). The pregnancy-related data for this group were compared with those for the TAI group (n = 974). Ultrasonography was performed at 60 days to determine the pregnancy status and confirm the sex of the fetus. A total of 2008 oocytes produced 1050 embryos, with 52% of them reaching the blastocyst stage. The pregnancy rate and the accuracy in determining the fetal sex were 35.4% (345/974) and 95.07% (328/345), respectively, for the IVF/TET group and 30% (293/974; P < 0.05) and 94.88% (278/293), respectively, for the TAI group. In the present study, we concluded that male calves could be better obtained using IVF/TET rather than TAI; therefore, this strategy can be considered to increase the pregnancy rate of beef cattle.
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Affiliation(s)
- C A G Pellegrino
- Departamento de Clínica e Cirurgia Veterinárias da Universidade Federal de Minas Gerais-UFMG, Belo Horizonte, MG, Brasil; Prole-Reprodução Animal Assistida Ltda, Belo Horizonte, MG, Brasil.
| | - F Morotti
- Departamento de Clínicas Veterinárias da Universidade Estadual de Londrina-UEL, Londrina, PR, Brasil
| | - R M Untura
- In Vitro Brasil Ltda, Mogi Mirim, SP, Brasil
| | | | - M F O Pellegrino
- Departamento de Clínica e Cirurgia Veterinárias da Universidade Federal de Minas Gerais-UFMG, Belo Horizonte, MG, Brasil
| | - J P Campolina
- Departamento de Clínica e Cirurgia Veterinárias da Universidade Federal de Minas Gerais-UFMG, Belo Horizonte, MG, Brasil
| | - M M Seneda
- Departamento de Clínicas Veterinárias da Universidade Estadual de Londrina-UEL, Londrina, PR, Brasil
| | - F A Barbosa
- Departamento de Clínica e Cirurgia Veterinárias da Universidade Federal de Minas Gerais-UFMG, Belo Horizonte, MG, Brasil
| | - M Henry
- Departamento de Clínica e Cirurgia Veterinárias da Universidade Federal de Minas Gerais-UFMG, Belo Horizonte, MG, Brasil
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Santos GMGD, Silva-Santos KC, Barreiros TRR, Morotti F, Sanches BV, de Moraes FLZ, Blaschi W, Seneda MM. High numbers of antral follicles are positively associated with in vitro embryo production but not the conception rate for FTAI in Nelore cattle. Anim Reprod Sci 2016; 165:17-21. [DOI: 10.1016/j.anireprosci.2015.11.024] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 11/07/2015] [Accepted: 11/30/2015] [Indexed: 11/26/2022]
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44
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Sanches BV, Lunardelli PA, Tannura JH, Cardoso BL, Pereira MHC, Gaitkoski D, Basso AC, Arnold DR, Seneda MM. A new direct transfer protocol for cryopreserved IVF embryos. Theriogenology 2015; 85:1147-51. [PMID: 26739533 DOI: 10.1016/j.theriogenology.2015.11.029] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 11/25/2015] [Accepted: 11/30/2015] [Indexed: 11/27/2022]
Abstract
The global demand for in vitro-produced (IVP) embryos of determined sex has greatly increased over the last decade. Efficient protocols for the direct transfer of IVP embryos are lacking. This study aimed to compare the pregnancy rates for fresh, vitrified, or frozen/directly transferred IVP dairy cow embryos. Oocytes (n = 3171) recovered by ovum pickup (n = 112) from Girolando (Holstein-Gir) females (n = 36) were selected and submitted to IVM for 24 hours at 38.5 °C with 5% CO2 in air with saturated humidity. In vitro fertilization was performed with the thawed, sexed semen from 5 Holstein bulls. After IVF, presumptive zygotes were denuded and cultured for 7 days under the same IVM and IVF conditions of temperature and humidity, except with 5% CO2 and 5% O2. Grade I blastocysts were randomly assigned for either the transferred fresh, vitrified/thawing, or frozen/directly embryo transfer into previously synchronized recipient females. Conception rates were analyzed by binomial logistic regression, and a probability level of P < 0.05 was considered significant. The conception rates were 51.35 ± 1.87% (133/259) for the fresh embryos, 35.89 ± 3.87% (84/234) for the vitrified embryos, and 40.19 ± 4.65% (125/311) for the frozen directly transferred embryos. These data demonstrate that IVP embryos with sexed semen could be directly transferred into recipient cows with similar conception rates to vitrified embryos. The comparison found that the use of frozen embryos in direct transfer provides easier logistics and a more practical approach for the transfer of IVP embryos on dairy farms.
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Affiliation(s)
| | - Paula Alvares Lunardelli
- Laboratory of Animal Reproduction, State University of Londrina (UEL), Department of Veterinary Clinics (DCV), CCA, Londrina, Paraná, Brazil
| | | | | | | | | | | | | | - Marcelo Marcondes Seneda
- Laboratory of Animal Reproduction, State University of Londrina (UEL), Department of Veterinary Clinics (DCV), CCA, Londrina, Paraná, Brazil.
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45
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González SM, Gomes RG, Souza AK, Silva CB, Silva-Santos KC, Seneda MM. Evidences of Regular Estrous Cycles in Mules and Successful Use of These Animals as Recipients for Donkey Embryos. J Equine Vet Sci 2015. [DOI: 10.1016/j.jevs.2015.07.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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46
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Marinho LSR, Sanches BV, Rosa CO, Tannura JH, Rigo AG, Basso AC, Pontes JHF, Seneda MM. Pregnancy Rates to Fixed Embryo Transfer of Vitrified IVPBos indicus, Bos taurusorBos indicus × Bos taurusEmbryos. Reprod Domest Anim 2015; 50:807-11. [DOI: 10.1111/rda.12591] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Accepted: 07/14/2015] [Indexed: 11/25/2022]
Affiliation(s)
- LSR Marinho
- Laboratório de Reprodução Animal; State University of Londrina (UEL); Londrina PR Brazil
| | - BV Sanches
- Laboratório de Reprodução Animal; State University of Londrina (UEL); Londrina PR Brazil
- In Vitro Brasil Ltda; Mogi Mirim SP Brazil
| | - CO Rosa
- Laboratório de Reprodução Animal; State University of Londrina (UEL); Londrina PR Brazil
| | - JH Tannura
- In Vitro Brasil Ltda; Mogi Mirim SP Brazil
| | - AG Rigo
- In Vitro Brasil Ltda; Mogi Mirim SP Brazil
| | - AC Basso
- In Vitro Brasil Ltda; Mogi Mirim SP Brazil
| | - JHF Pontes
- In Vitro Brasil Ltda; Mogi Mirim SP Brazil
| | - MM Seneda
- Laboratório de Reprodução Animal; State University of Londrina (UEL); Londrina PR Brazil
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47
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Gomes RG, Lisboa LA, Silva CB, Max MC, Marino PC, Oliveira RL, González SM, Barreiros TRR, Marinho LSR, Seneda MM. Improvement of development of equine preantral follicles after 6 days of in vitro culture with ascorbic acid supplementation. Theriogenology 2015; 84:750-5. [PMID: 26074067 DOI: 10.1016/j.theriogenology.2015.05.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 05/07/2015] [Accepted: 05/07/2015] [Indexed: 02/08/2023]
Abstract
The aim of this study was to evaluate the effects of different concentrations of ascorbic acid (25, 50, and 100 μg/mL) in supplemented minimum essential medium (MEM+) on the development of equine preantral follicles that were cultured in vitro for 2 or 6 days. The contralateral ovaries (n = 5) from five mares in seasonal anestrus were collected from a local abattoir. Nine ovarian tissue fragments of approximately 5 × 5 × 1 mm were obtained from each animal. One fragment was immediately fixed and subjected to histologic analysis (control group; Day 0), and the other eight were placed in PBS supplemented with penicillin (200 IU/mL) and streptomycin (200 mg/mL) at 4 °C for 1 hour (during transport to the laboratory). The fragments were cultured in situ for 2 days (D2) or 6 days (D6) in MEM+ or MEM+ plus ascorbic acid at three different concentrations, establishing the following nine groups: control; MEM+ (D2); MEM+ (D6); MEM+ 25 μg/mL of ascorbic acid (D2); MEM+ 25 μg/mL of ascorbic acid (D6); MEM+ 50 μg/mL of ascorbic acid (D2); MEM+ 50 μg/mL of ascorbic acid (D6); MEM+ 100 μg/mL of ascorbic acid (D2); and MEM+ 100 μg/mL of ascorbic acid (D6). The preantral follicles were classified according to their stage (primordial, primary, secondary, or antral) and their morphology (normal or abnormal). Slides (n = 951) including 4450 histologic sections were evaluated. Follicles were observed in only 4.85% (216 of 4450) of the histologic sections. Of the 407 follicles evaluated, 120 were in the primordial stage and 287 were in different developmental stages; additionally, 43.5% were morphologically normal. After 6 days of culture, the groups cultured with 50 and 100 μg/mL of ascorbic acid differed in terms of follicular development compared with the other groups. On the basis of occurrence of follicular development and the presence of viable follicles, it can be concluded that a positive effect of culture for 6 days in MEM+ supplemented with 50 and 100 μg/mL of ascorbic acid was observed on equine ovarian fragments.
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Affiliation(s)
- R G Gomes
- Laboratório de Reprodução Animal, DCV, CCA, UEL, Londrina, Parana, Brazil
| | - L A Lisboa
- Laboratório de Reprodução Animal, DCV, CCA, UEL, Londrina, Parana, Brazil
| | - C B Silva
- Laboratório de Reprodução Animal, DCV, CCA, UEL, Londrina, Parana, Brazil
| | - M C Max
- Laboratório de Reprodução Animal, DCV, CCA, UEL, Londrina, Parana, Brazil
| | - P C Marino
- Laboratório de Reprodução Animal, DCV, CCA, UEL, Londrina, Parana, Brazil
| | - R L Oliveira
- Laboratório de Reprodução Animal, DCV, CCA, UEL, Londrina, Parana, Brazil
| | - S M González
- Laboratório de Reprodução Animal, DCV, CCA, UEL, Londrina, Parana, Brazil
| | - T R R Barreiros
- Laboratório de Biotecnologia da Reprodução Animal, DVPA, UENP, Bandeirantes, Parana, Brazil
| | - L S R Marinho
- Laboratório de Reprodução Animal, DCV, CCA, UEL, Londrina, Parana, Brazil
| | - M M Seneda
- Laboratório de Reprodução Animal, DCV, CCA, UEL, Londrina, Parana, Brazil.
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48
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Marques MDO, Morotti F, da Silva CB, Júnior MR, da Silva RCP, Baruselli PS, Seneda MM. Influence of category--heifers, primiparous and multiparous lactating cows--in a large-scale resynchronization fixed-time artificial insemination program. J Vet Sci 2015; 16:367-71. [PMID: 25797292 PMCID: PMC4588023 DOI: 10.4142/jvs.2015.16.3.367] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Accepted: 03/07/2015] [Indexed: 11/20/2022] Open
Abstract
This study was conducted to evaluate the influence of category (heifers, primiparous or multiparous cows) on pregnancy rates in a large scale resynchronization ovulation program. Nelore heifers (n = 903), primiparous lactating cows (n = 338) and multiparous lactating cows (n = 1,223) were synchronized using a conventional protocol of estradiol/P4-based fixed-time artificial insemination (FTAI). Thirty days after ultrasonography, females who failed the first FTAI were resynchronized with the same hormonal protocol prior to a second FTAI. The pregnancy status of each cohort was evaluated by ultrasonography 30 days after each FTAI. The average conception rate after the first FTAI and resynchronization was 80.5%. Heifers had a higher conception rate (85%) than primiparous (76%) or multiparous cows (78%; p = 0.0001). The conception rate after the first FTAI was similar among heifers (57%), primiparous cows (51%) and multiparous cows (56%; p = 0.193). After the second FTAI, heifers exhibited a higher conception rate (66%) than primiparous or multiparous cows (51%; p = 0.0001). These results demonstrate the feasibility of resynchronization in large beef herds for providing consistent pregnancy rates in a short period of time. We also demonstrated that ovulation resynchronization 30 days after FTAI is particularly effective for heifers, providing a conception rate of up to 66%.
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49
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Garcia SM, Marinho LSR, Lunardelli PA, Seneda MM, Meirelles FV. Developmental block and programmed cell death in Bos indicus embryos: effects of protein supplementation source and developmental kinetics. PLoS One 2015; 10:e0119463. [PMID: 25760989 PMCID: PMC4356560 DOI: 10.1371/journal.pone.0119463] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Accepted: 01/21/2015] [Indexed: 11/18/2022] Open
Abstract
The aims of this study were to determine if the protein source of the medium influences zebu embryo development and if developmental kinetics, developmental block and programmed cell death are related. The culture medium was supplemented with either fetal calf serum or bovine serum albumin. The embryos were classified as Fast (n = 1,235) or Slow (n = 485) based on the time required to reach the fourth cell cycle (48 h and 90 h post insemination - hpi -, respectively). The Slow group was further separated into two groups: those presenting exactly 4 cells at 48 hpi (Slow/4 cells) and those that reached the fourth cell cycle at 90 hpi (Slow). Blastocyst quality, DNA fragmentation, mitochondrial membrane potential and signs of apoptosis or necrosis were evaluated. The Slow group had higher incidence of developmental block than the Fast group. The embryos supplemented with fetal calf serum had lower quality. DNA fragmentation and mitochondrial membrane potential were absent in embryos at 48 hpi but present at 90 hpi. Early signs of apoptosis were more frequent in the Slow and Slow/4 cell groups than in the Fast group. We concluded that fetal calf serum reduces blastocyst development and quality, but the mechanism appears to be independent of DNA fragmentation. The apoptotic cells detected at 48 hpi reveal a possible mechanism of programmed cell death activation prior to genome activation. The apoptotic cells observed in the slow-developing embryos suggested a relationship between programmed cell death and embryonic developmental kinetics in zebu in vitro-produced embryos.
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Affiliation(s)
- Sheila Merlo Garcia
- São Paulo University (USP), Faculdade de Zootecnia e Engenharia de Alimentos, Pirassununga, SP, Brazil
| | | | - Paula Alvares Lunardelli
- State University of Londrina (UEL), Laboratório de Reprodução Animal, DCV, CCA, Londrina, PR, Brazil
| | - Marcelo Marcondes Seneda
- State University of Londrina (UEL), Laboratório de Reprodução Animal, DCV, CCA, Londrina, PR, Brazil
- * E-mail:
| | - Flávio Vieira Meirelles
- São Paulo University (USP), Faculdade de Zootecnia e Engenharia de Alimentos, Pirassununga, SP, Brazil
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50
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Silva-Santos KC, Santos GMGD, Siloto LS, Santos JTD, Oliveira ERD, Machado FZ, Rosa CO, Seneda MM. The correlation between the number of antral follicles and ovarian reserves (preantral follicles) in purebred Bos indicus and Bos taurus cows. Anim Reprod Sci 2014; 151:119-25. [DOI: 10.1016/j.anireprosci.2014.10.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 09/12/2014] [Accepted: 10/15/2014] [Indexed: 10/24/2022]
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