1
|
Li Z, Luan S, Yan L, Xie C, Lian Z, Yang M, Mei M, Lin P, Wang A, Jin Y. Effect of Double-Ovsynch and Presynch-Ovsynch on postpartum ovarian cysts and inactive ovary in high-yielding dairy cows. Front Vet Sci 2024; 11:1348734. [PMID: 38362302 PMCID: PMC10867105 DOI: 10.3389/fvets.2024.1348734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Accepted: 01/22/2024] [Indexed: 02/17/2024] Open
Abstract
Introduction Optimizing the management of dairy cattle reproduction can reduce postpartum ovarian disease in high-yielding dairy cows and thus enhance ranch economic benefit. The hypothesis of this study was that the Double-Ovsynch (DO) protocol in high-producing dairy cows would result in a lower incidence of follicular cysts but a higher incidence of luteal cysts compared to those undergoing the Presynch-Ovsynch (PS) protocol. Methods In this experiment, 384 cows (204 primiparous and 180 multiparous) were allocated to the DO group, which followed the protocol: GnRH-7d-PGF2α-3d-GnRH-7d-Ovsynch-56 h (GnRH-7d-PGF2α-56 h-GnRH-16hTAI), starting on 39 ± 3 days in milk (DIM). Additionally, 359 cows (176 primiparous and 183 multiparous) were assigned to the PS group, which followed the protocol: PGF2α-14d-PGF2α-12d-Ovsynch-56 h, starting on 31 ± 3 DIM. In DO, B-mode ultrasound examinations were conducted 1 day after the GnRH-7d-PGF2α-3d-GnRH protocol to diagnose the presence of ovarian diseases followed by reexamination after 7 days of suspected cases. In PS, B-mode ultrasound examinations were conducted 1 day after the PGF2α-14d-PGF2α protocol to diagnose the presence of ovarian diseases followed by reexamination after 7 days. For all cows confirmed to having ovarian diseases, a second B-mode ultrasound examination was conducted at the time of the second GnRH and timed artificial insemination (TAI). If the ovary showed a normal developing follicle in combination with normal ovulation, the ovarian disease was considered to be cured. Results The current study revealed no significant difference in the overall incidence and cure rate of postpartum ovarian diseases between DO and PS (incidence rate: 3.9% vs. 6.7%, cure rate: 50% vs. 41.7%, DO vs. PS). Also, there was no significant difference in the incidence and cure rate of luteal cysts between DO and PS (incidence rate: 2.9% vs. 2.2%, cure rate: 50.0% vs. 50.0%). The incidence of follicular cysts was significantly lower in the DO group than in the PS group (0.8% vs. 2.8%, DO vs. PS, p = 0.037), but there was no significant difference in the cure rates (66.7% vs. 50%). The occurrence of inactive ovary was lower in DO compared to PS (0.2% vs. 1.7%, p = 0.047). There was no significant difference in the pregnancy rate between the DO and PS groups (48.2% vs. 41.8%), although the DO group had a higher rate. What is different from our assumption is that PS did not effectively reduce the incidence of postpartum luteal cysts.
Collapse
Affiliation(s)
- Ziyuan Li
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, China
| | - Shuyi Luan
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, China
| | - LongGang Yan
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, China
| | - Chengyun Xie
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, China
| | - Zhengjie Lian
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, China
| | - Mingmao Yang
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, China
| | - Minmin Mei
- School of Animal Science and Technology, Guangdong Polytechnic of Science and Trade, Qingyuan, China
| | - Pengfei Lin
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
| | - Aihua Wang
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, China
| | - Yaping Jin
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, China
| |
Collapse
|
2
|
Magata F, Tsukamura H, Matsuda F. The impact of inflammatory stress on hypothalamic kisspeptin neurons: Mechanisms underlying inflammation-associated infertility in humans and domestic animals. Peptides 2023; 162:170958. [PMID: 36682622 DOI: 10.1016/j.peptides.2023.170958] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 12/27/2022] [Accepted: 01/17/2023] [Indexed: 01/21/2023]
Abstract
Inflammatory diseases attenuate reproductive functions in humans and domestic animals. Lipopolysaccharide (LPS), an endotoxin released by bacteria, is known to disrupt female reproductive functions in various inflammatory diseases. LPS administration has been used to elucidate the impact of pathophysiological activation of the immune system on reproduction. Hypothalamic kisspeptin neurons are the master regulators of mammalian reproduction, mediating direct stimulation of hypothalamic gonadotropin-releasing hormone (GnRH) release and consequent release of gonadotropins, such as luteinizing hormone (LH) and follicle-stimulating hormone from the pituitary. The discovery of kisspeptin neurons in the mammalian hypothalamus has drastically advanced our understanding of how inflammatory stress causes reproductive dysfunction in both humans and domestic animals. Inflammation-induced ovarian dysfunction could be caused, at least partly, by aberrant GnRH and LH secretion, which is regulated by kisspeptin signaling. In this review, we focus on the effects of LPS on hypothalamic kisspeptin neurons to outline the impact of inflammatory stress on neuroendocrine regulation of mammalian reproductive systems. First, we summarize the attenuation of female reproduction by LPS during inflammation and the effects of LPS on ovarian and pituitary function. Second, we outline the inhibitory effects of LPS on pulsatile- and surge-mode GnRH/LH release. Third, we discuss the LPS-responsive hypothalamic-pituitary-adrenal axis and hypothalamic neural systems in terms of the cytokine-mediated pathway and the possible direct action of LPS via its hypothalamic receptors. This article describes the impact of LPS on hypothalamic kisspeptin neurons and the possible mechanisms underlying LPS-mediated disruption of LH pulses/surge via kisspeptin neurons.
Collapse
Affiliation(s)
- Fumie Magata
- Department of Veterinary Medical Sciences, the University of Tokyo, Tokyo 113-8657, Japan.
| | - Hiroko Tsukamura
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi 464-8601, Japan.
| | - Fuko Matsuda
- Department of Veterinary Medical Sciences, the University of Tokyo, Tokyo 113-8657, Japan.
| |
Collapse
|
3
|
Wang K, Cheng Y, Guo T, Guo X, Zhang H, Ma X, Pan Y, Kebreab E, Wang D, Lyu L. Analyzing the interactions of mRNAs, miRNAs and lncRNAs to predict ceRNA networks in bovine cystic follicular granulosa cells. Front Vet Sci 2022; 9:1028867. [PMID: 36311668 PMCID: PMC9606814 DOI: 10.3389/fvets.2022.1028867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 09/26/2022] [Indexed: 11/04/2022] Open
Abstract
Cross-talk between competitive endogenous RNAs (ceRNAs) may play a critical role in revealing potential mechanism of bovine follicular cysts. Ovarian cyst has always been an intractable scientific problem and has led to considerable economic losses to bovine breeding industry. However, its pathogenesis and molecular mechanisms are still not well understood. Here, this study aimed to investigate the role of non-coding RNAs (ncRNAs) and the ceRNA networks in bovine follicular cyst. Whole transcriptome sequencing of bovine follicular granulosa cells (GCs) was conducted to obtain the expression profiles of mRNAs, lncRNAs and miRNAs. The results for the identified expressions of 8,003 mRNAs, 579 lncRNAs and 205 miRNAs were often altered between cystic and normal follicular GCs. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway analyses were performed on these differentially expressed mRNAs. Furthermore, the ceRNA network combining mRNAs, miRNAs, and lncRNAs using several bioinformatics methods based on co-expression analysis between the differentially expressed RNAs was conducted. Finally, the lncRNA NONBTAT027373.1-miR-664b-HSD17B7 pathway was verified by dual-luciferase reporting assay and RNA binding protein immunoprecipitation (RIP) assay. LncRNA NONBTAT027373.1 sponged miR-664b in GCs and prevented miR-664b from binding to the HSD17B7 3′-UTR. These results indicated that genes and lncRNAs related to steroid hormone synthesis and energy metabolism could play important roles in the formation of bovine cystic follicles through the ceRNA mechanism and represent candidate targets for further research. This can be used as a practical guideline for promoting healthy and highly efficient development in the bovine industry.
Collapse
Affiliation(s)
- Kai Wang
- College of Animal Science, Shanxi Agricultural University, Jinzhong, China
| | - Ying Cheng
- College of Animal Science, Shanxi Agricultural University, Jinzhong, China
| | - Tong Guo
- Department of Animal Husbandry and Veterinary Medicine, Beijing Vocational College of Agriculture, Beijing, China
| | - Xiangqian Guo
- College of Animal Science, Shanxi Agricultural University, Jinzhong, China
| | - Hongzhi Zhang
- College of Animal Science, Shanxi Agricultural University, Jinzhong, China
| | - Xiaoyan Ma
- College of Animal Science, Shanxi Agricultural University, Jinzhong, China
| | - Yangyang Pan
- College of Animal Science, Shanxi Agricultural University, Jinzhong, China
| | - Ermias Kebreab
- Department of Animal Science, University of California, Davis, Davis, CA, United States
| | - Dong Wang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China,Dong Wang
| | - Lihua Lyu
- College of Animal Science, Shanxi Agricultural University, Jinzhong, China,*Correspondence: Lihua Lyu
| |
Collapse
|
4
|
Viana ACNPCS, Freitas JLS, Magalhães LC, Campos LB, Silva AR, Oliveira MF, Freitas VJF, Melo LM. Ovarian gene expression in collared peccary (Pecari tajacu Linnaeus, 1758) subjected to gonadotropin stimulation protocols. Reprod Domest Anim 2020; 56:351-359. [PMID: 33259113 DOI: 10.1111/rda.13872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 11/15/2020] [Accepted: 11/27/2020] [Indexed: 11/28/2022]
Abstract
Ovarian response of collared peccaries (Pecari tajacu), after hormonal stimulation with gonadotropin association (eCG/hCG), was accessed by both gene expression and follicular development. Thus, collared peccaries (n = 8) were treated with the dose used for sows (swine dose, SWD) or with dose adjusted for peccary's weight (allometric dose, ALD). The gene expression of receptors was evaluated for both gonadotropins (FSHR and LHCGR) and growth factors (proteins codified by TGFβR-1, BMPR1-A and BMPR2 genes) in antral follicles, cortex and corpora haemorrhagica (CH). Five days after gonadotropin injection, all females presented CH. The ovulation rate was similar (p > .05) between SWD (4.00 ± 1.17) and ALD (2.50 ± 0.43) group. The total number of follicles per animal and amounts of small (<3 mm), medium (3-5 mm) and large (>5 mm) follicles was similar among groups. However, SWD produced large follicles heavier than ALD group, as accessed by weight of follicular wall biopsies. Ovarian follicles expressed both gonadotropin and growth factor receptors at levels which are independent from gonadotropin dose. In conclusion, the two gonadotropin doses (SWD and ALD) can be used for ovarian stimulation of collared peccary. Additionally, FSH and growth factors (TGFβR-1, BMPR1-A and BMPR2) receptors are more expressed in the early follicle development, while LH receptor seems to be more important in the final of follicular growth.
Collapse
Affiliation(s)
- Ana Clara N P C S Viana
- Laboratory of Physiology and Control of Reproduction, Veterinary School, State University of Ceará (UECE), Fortaleza, Brazil
| | - Jeferson L S Freitas
- Laboratory of Physiology and Control of Reproduction, Veterinary School, State University of Ceará (UECE), Fortaleza, Brazil
| | - Lívia C Magalhães
- Laboratory of Physiology and Control of Reproduction, Veterinary School, State University of Ceará (UECE), Fortaleza, Brazil
| | - Lívia B Campos
- Laboratory of Animal Germplasm Conservation, Department of Animal Science, Federal Rural University of the Semi-Arid (UFERSA), Mossoró, Brazil
| | - Alexandre R Silva
- Laboratory of Animal Germplasm Conservation, Department of Animal Science, Federal Rural University of the Semi-Arid (UFERSA), Mossoró, Brazil
| | - Moacir F Oliveira
- Laboratory of Animal Germplasm Conservation, Department of Animal Science, Federal Rural University of the Semi-Arid (UFERSA), Mossoró, Brazil
| | - Vicente J F Freitas
- Laboratory of Physiology and Control of Reproduction, Veterinary School, State University of Ceará (UECE), Fortaleza, Brazil
| | - Luciana M Melo
- Laboratory of Physiology and Control of Reproduction, Veterinary School, State University of Ceará (UECE), Fortaleza, Brazil.,Molecular Genetics Research Unit, University Center Fametro (Unifametro), Fortaleza, Brazil
| |
Collapse
|
5
|
Lapp R, Röttgen V, Viergutz T, Weitzel JM, Vernunft A. Induction of cystic ovarian follicles (COFs) in cattle by using an intrafollicular injection of indomethacin. J Reprod Dev 2020; 66:181-188. [PMID: 31983719 PMCID: PMC7175383 DOI: 10.1262/jrd.2019-107] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 12/01/2019] [Indexed: 11/30/2022] Open
Abstract
The aim of this study was to establish a model to induce cystic ovarian follicles (COFs) in cattle using the cyclooxygenase inhibitor, indomethacin. Eighteen Holstein-Frisian cattle were synchronized with prostaglandin F2alpha (PGF2α) and gonadotropin-releasing hormone (GnRH). Ultrasound-guided transvaginal intrafollicular injections were performed in 23 preovulatory follicles with different concentrations of indomethacin 16 h after GnRH administration. An injection of 0.2 ml 35 µM indomethacin solution (resulting in a final concentration of 8 µg/ml in the follicular fluid) was the minimal dosage leading to COF formation. The induced COFs reached a maximum mean diameter of 36.9 ± 4.5 mm eleven days after injection. The estrous cycle was extended to 25-39 days. Luteinization was first observed 4 days after injection, accompanied by a slight increase in plasma progesterone concentration. The bioactivity of indomethacin was demonstrated by the decrease of prostaglandin E2 in the follicular fluid of three animals. The method presented here is minimally invasive and allows for the generation of defined COFs for further investigations.
Collapse
Affiliation(s)
- Rebecca Lapp
- Institute of Reproductive Biology, Leibniz Institute for Farm Animal Biology (FBN), D-18196 Dummerstorf, Germany
| | - Volker Röttgen
- Institute of Reproductive Biology, Leibniz Institute for Farm Animal Biology (FBN), D-18196 Dummerstorf, Germany
- Institute of Behavioural Physiology, Leibniz Institute for Farm Animal Biology (FBN), D-18196 Dummerstorf, Germany
| | - Torsten Viergutz
- Institute of Reproductive Biology, Leibniz Institute for Farm Animal Biology (FBN), D-18196 Dummerstorf, Germany
| | - Joachim M Weitzel
- Institute of Reproductive Biology, Leibniz Institute for Farm Animal Biology (FBN), D-18196 Dummerstorf, Germany
| | - Andreas Vernunft
- Institute of Reproductive Biology, Leibniz Institute for Farm Animal Biology (FBN), D-18196 Dummerstorf, Germany
| |
Collapse
|
6
|
Metodiev N, Dimov D, Ralchev I, Raicheva E, Ignatova M. The effect of saltfree - salt diet on the reproductive performance of Ile de France ewes. BULGARIAN JOURNAL OF VETERINARY MEDICINE 2019. [DOI: 10.15547/bjvm.2007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The aim of the present study was to establish the effect of salt-free - salt diet (SFSD) on the size of antral follicles during salt consumption, the duration of controlled breeding campaign and the fertilities of ewes from the Ile de France breed. Тhe experiment was carried out with 57 ewes, which were divided into 3 groups (19 ewes in each) depending on whether they were subjected to SFSD and their contacts with rams during the first 8 days of the beginning of breeding: Group I – SFSD + ram contact; Group II – only SFSD; Group III – no SFSD, only ram contacts. The first day of the salt diet coincided with the first day of ram contacts. Transrectal ultrasound examinations of the ovaries were done on days 1, 2, 3, 5, 6 and 7. The time of manifestation of estrus (in days), pregnancy rate and fecundity were studied. A significant effect of time (P<0.05) and diet (P<0.01) on the size of follicles was established. The onset of the first estrus, the shortest terms of breeding campaign, the fertility and the fecundity results gave us reason to favour the scheme applied to Group II. A stimulatory effect of the diet in that study was demonstrated, but the pattern was different from our previous studies.
Collapse
|
7
|
Melo LF, Monteiro PLJ, Oliveira LH, Guardieiro MM, Drum JN, Wiltbank MC, Sartori R. Circulating progesterone concentrations in nonlactating Holstein cows during reuse of intravaginal progesterone implants sanitized by autoclave or chemical disinfection. J Dairy Sci 2018; 101:3537-3544. [PMID: 29428743 DOI: 10.3168/jds.2017-13569] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 12/05/2017] [Indexed: 11/19/2022]
Abstract
The aim of this study was to compare plasma progesterone (P4) concentrations in nonlactating, multiparous Holstein cows (n = 24) treated with 2 types of intravaginal implants containing either 1.0 or 1.9 g of P4 either at the first use or during reuse of the implants after sanitizing the implant by autoclave or chemical disinfection. In a completely randomized design with a 2 × 3 factorial arrangement and 2 replicates, every cow underwent 2 of 6 treatments. Two sources of P4 [controlled internal drug release (1.9 g of P4) from Zoetis (São Paulo, Brazil), and Sincrogest (1.0 g of P4) from Ourofino (Cravinhos, Brazil)] and 3 types of processing, new (N), reused after autoclave (RA), and reused after chemical disinfection (RC), were used. After inducing luteolysis to avoid endogenous circulating P4, the cows were randomized in 1 of 6 treatments (1.9 g of N, 1.9 g of RA, 1.9 g of RC, 1.0 g of N, 1.0 g of RA, and 1.0 g RC). Cows were treated with the implants for 8 d and during this period blood samples were collected at 0, 2, 12, 24, 48, 72, 96, 120, 144, 168, and 192 h. Statistical analyses were performed using Proc-Mixed and the mean ± standard error of the mean P4 concentrations were calculated using the Proc-Means procedures of SAS 9.4 (SAS Institute Inc., Cary, NC). No interaction between treatments was observed. Comparing types of implant, average P4 concentrations during treatments were greater for 1.9 g than 1.0 g (1.46 vs. 1.14 ± 0.04 ng/mL). When types of processing were compared, average P4 concentrations did not differ between autoclaved and new inserts (1.46 vs. 1.37 ± 0.05 ng/mL; respectively), but both were greater than chemically disinfected implants (1.09 ± 0.04 ng/mL). Within 1.9-g P4 inserts, P4 concentrations from autoclaved implants were greater than new, which were greater than chemically disinfected (1.67 ± 0.06 vs. 1.49 ± 0.07 vs. 1.21 ± 0.05 ng/mL; respectively). For 1.0-g P4 implants, P4 concentrations from autoclaved did not differ from new, but both were greater than chemically disinfected (1.20 ± 0.08 vs. 1.24 ± 0.06 vs. 0.97 ± 0.05 ng/mL; respectively). In conclusion, the mean plasma P4 concentration in nonlactating Holstein cows was greater for 1.9 than 1.0 g of P4 and regardless of the type of implant, the autoclaving process provided greater circulating P4 in relation to chemical disinfection, and similar or greater P4 concentrations compared with a new implant.
Collapse
Affiliation(s)
- L F Melo
- Department of Animal Science, University of São Paulo, Piracicaba, SP 13418-900 Brazil
| | - P L J Monteiro
- Department of Animal Science, University of São Paulo, Piracicaba, SP 13418-900 Brazil
| | - L H Oliveira
- Department of Animal Science, University of São Paulo, Piracicaba, SP 13418-900 Brazil
| | - M M Guardieiro
- National Agricultural Laboratory, Ministry of Agriculture, Livestock and Food Supply, Campinas, SP 13100-105, Brazil
| | - J N Drum
- Department of Animal Science, University of São Paulo, Piracicaba, SP 13418-900 Brazil
| | - M C Wiltbank
- Department of Dairy Science, University of Wisconsin-Madison, Madison 53706
| | - R Sartori
- Department of Animal Science, University of São Paulo, Piracicaba, SP 13418-900 Brazil.
| |
Collapse
|
8
|
Armengol-Gelonch R, Mallo J, Ponté D, Jimenez A, Valenza A, Souza A. Impact of phase of the estrous cycle and season on LH surge profile and fertility in dairy cows treated with different GnRH analogs (gonadorelin vs. buserelin). Theriogenology 2017; 91:121-126. [DOI: 10.1016/j.theriogenology.2017.01.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 12/28/2016] [Accepted: 01/03/2017] [Indexed: 10/20/2022]
|
9
|
Abstract
Postpartum diseases are common in dairy cows, and their incidence contributes to reduced fertility and increased risk of culling, making their prevention and management extremely important. Reproductive efficiency has a major impact on economic success of any dairy production unit. Optimizing reproductive efficiency contributes to overall efficiency of production units, minimizing environmental impacts and contributing to sustainability of food production. Additionally, control of reproductive diseases is important for maintenance of health and welfare of dairy cows; for minimizing use of antibiotics; and ensuring a wholesome, safe, and nutritious product.
Collapse
Affiliation(s)
- Robert O Gilbert
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Tower Road, Ithaca, NY 14853-6401, USA.
| |
Collapse
|
10
|
Ortega HH, Marelli BE, Rey F, Amweg AN, Díaz PU, Stangaferro ML, Salvetti NR. Molecular aspects of bovine cystic ovarian disease pathogenesis. Reproduction 2015; 149:R251-64. [DOI: 10.1530/rep-14-0618] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Accepted: 03/12/2015] [Indexed: 11/08/2022]
Abstract
Cystic ovarian disease (COD) is one of the main causes of reproductive failure in cattle and causes severe economic loss to the dairy farm industry because it increases both days open in the post partum period and replacement rates due to infertility. This disease is the consequence of the failure of a mature follicle to ovulate at the time of ovulation in the estrous cycle. This review examines the evidence for the role of altered steroid and gonadotropin signaling systems and the proliferation/apoptosis balance in the ovary with cystic structures. This evidence suggests that changes in the expression of ovarian molecular components associated with these cellular mechanisms could play a fundamental role in the pathogenesis of COD. The evidence also shows that gonadotropin receptor expression in bovine cystic follicles is altered, which suggests that changes in the signaling system of gonadotropins could play a fundamental role in the pathogenesis of conditions characterized by altered ovulation, such as COD. Ovaries from animals with COD exhibit a disrupted steroid receptor pattern with modifications in the expression of coregulatory proteins. These changes in the pathways of endocrine action would trigger the changes in proliferation and apoptosis underlying the aberrant persistence of follicular cysts.Free Spanish abstract: A Spanish translation of this abstract is freely available at http://www.reproduction-online.org/content/149/6/R251/suppl/DC1.
Collapse
|
11
|
Wiltbank MC, Pursley JR. The cow as an induced ovulator: Timed AI after synchronization of ovulation. Theriogenology 2014; 81:170-85. [DOI: 10.1016/j.theriogenology.2013.09.017] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2013] [Revised: 09/17/2013] [Accepted: 09/18/2013] [Indexed: 12/22/2022]
|
12
|
Spitschak M, Vanselow J. Bovine large luteal cells show increasing de novo DNA methylation of the main ovarian CYP19A1 promoter P2. Gen Comp Endocrinol 2012; 178:37-45. [PMID: 22531467 DOI: 10.1016/j.ygcen.2012.04.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 03/21/2012] [Accepted: 04/06/2012] [Indexed: 11/30/2022]
Abstract
Transformation of the estrogen producing large dominant follicle into a functional progesterone producing corpus luteum involves profound and well-orchestrated changes in cell type-specific gene expression profiles, possibly involving epigenetic mechanisms of gene silencing. As an experimental paradigm to examine the involvement of de novo DNA methylation in the process of luteinization, the transcript abundance and promoter-specific DNA methylation levels of CYP19A1, which encodes the key enzyme for estrogen biosynthesis, were analyzed in enzymatically dispersed and purified large granulosa luteal cells of early- to mid-cycle bovine corpora lutea. To characterize the morphology and physiology of isolated corpora lutea, their weights and the respective plasma progesterone levels were analyzed. Transcript abundance of CYP19A1, HSD3B1, GHR, and of LHGCR was quantified by real-time PCR. Methylation levels were analyzed by bisulfite direct sequencing. The data indicated that corpora lutea weights and plasma progesterone levels significantly increased during the early luteal phase (days 3-6 of the cycle). The growth of small and large luteal cells was particularly pronounced between days 3 and 4. Large luteal cells are characterized by high HSD3B1 and GHR, but low LHCGR transcript abundance, whereas CYP19A1 expression was very low or undetectable. The DNA methylation levels of the main ovarian CYP19A1 promoter P2 significantly increased from day 5. In conclusion, the data indicated de novo DNA methylation approximately five days after the luteinizing hormone-induced down-regulation of CYP19A1 expression, suggesting that DNA methylation during the early luteal phase might play a role for permanent silencing of previously down-regulated genes.
Collapse
Affiliation(s)
- Marion Spitschak
- Molecular Biology, Leibniz Institute for Farm Animal Biology, Wilhelm-Stahl-Allele 2, Dummerstorf, Germany
| | | |
Collapse
|
13
|
Wiltbank M, Sartori R, Herlihy M, Vasconcelos J, Nascimento A, Souza A, Ayres H, Cunha A, Keskin A, Guenther J, Gumen A. Managing the dominant follicle in lactating dairy cows. Theriogenology 2011; 76:1568-82. [DOI: 10.1016/j.theriogenology.2011.08.012] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2011] [Revised: 07/25/2011] [Accepted: 08/09/2011] [Indexed: 10/17/2022]
|
14
|
Dahlen CR, Marquezini GHL, Larson JE, Lamb GC. Human chorionic gonadotropin influences ovarian function and concentrations of progesterone in prepubertal Angus heifers1. J Anim Sci 2011; 89:2739-49. [DOI: 10.2527/jas.2010-3712] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
15
|
Dean M, Dailey RA. The ability of subordinate follicles of the second follicular wave to become dominant is lost by day 15 of the estrous cycle in cattle. Anim Reprod Sci 2011; 126:162-7. [PMID: 21757303 DOI: 10.1016/j.anireprosci.2011.06.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Revised: 06/08/2011] [Accepted: 06/17/2011] [Indexed: 11/25/2022]
Abstract
Generally, unilateral ovariectomy before a critical period in the latter part of the estrous cycle induces a transitory increase in plasma FSH, which causes subordinate follicles to develop and maintain ovulation rates characteristic of the species. A limiting period for subordinate follicles to assume dominance and from which ovulation occurs has not been shown for cattle. Growth and/or regression of subordinate follicles were characterized following removal of the dominant follicle at different days of the luteal phase of the estrous cycle in cattle in this study. In the mid-luteal phase (Day 13 or 15), the ovary with the dominant follicle of the second wave was ablated via unilateral ovariectomy; the corpus luteum also was removed. In the late luteal phase (Day 17 or 19), the dominant follicle was ablated with an ultrasonically guided 20 gauge needle. When the dominant follicle was removed on Day 13, the largest subordinate follicle of the second wave of follicular development became dominant and ovulation occurred from this follicle in 4 of 4 animals. However, when the dominant follicle was removed on Day 15, 17 or 19, a new wave of follicular development was induced in 14 of 15 animals. Moreover, the recovered subordinate follicle of the second wave of follicular development had similar growth characteristics to naturally occurring dominant follicles. In conclusion, the subordinate follicle in the second follicular wave in cattle retained the ability to become dominant, but this ability was lost by Day 15 of the estrous cycle. However, cattle then were able to maintain ovulation by developing a new wave of follicular growth.
Collapse
Affiliation(s)
- M Dean
- Division of Animal and Nutritional Sciences, West Virginia University, Morgantown, WV 26506, USA
| | | |
Collapse
|
16
|
Peter A, Levine H, Drost M, Bergfelt D. Compilation of classical and contemporary terminology used to describe morphological aspects of ovarian dynamics in cattle. Theriogenology 2009; 71:1343-57. [DOI: 10.1016/j.theriogenology.2008.12.026] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2008] [Revised: 01/09/2009] [Accepted: 12/20/2008] [Indexed: 12/31/2022]
|
17
|
Santos R, Démetrio D, Vasconcelos J. Cisto ovariano em vacas de leite: incidência, resposta à aplicação de GnRH e desempenho reprodutivo. ARQ BRAS MED VET ZOO 2009. [DOI: 10.1590/s0102-09352009000300001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A incidência de cistos ovarianos, a resposta ao tratamento com GnRH e os efeitos da ocorrência de cisto no desempenho reprodutivo e na taxa de descarte foram determinados em vacas lactantes da raça Holandesa. Vacas lactantes (n=333) foram avaliadas semanalmente por ultrassonografia a partir da quarta semana pós-parto, visando à detecção de corpos lúteos (CL) e de folículos ovarianos maiores que 10mm. Na sétima semana pós-parto, as vacas foram classificadas: em ciclando (n=248; presença de CL em um dos exames ultrassonográficos); em anestro (n=54; ausência de CL e de folículos >25mm) e com cisto (n=31; ausência de CL e presença de estruturas >25mm), quando foram distribuídas em: grupo-controle (n=16; sem tratamento) e grupo-tratamento (n=15; vacas que receberam uma aplicação de GnRH). A taxa de cura foi de 60,0% no grupo das vacas tratadas e de 87,5% no grupo-controle. As vacas com cistos apresentaram maior intervalo parto-primeira inseminação artificial (P<0,05; 91,4±8,3 vs. 77,8±2,5), maior número de serviços por concepção (P<0,05; 4,4±1,2 vs. 3,6±1,5), maior intervalo parto-concepção (P<0,05; 214,8±25,9 vs. 174,9±7,7) e maior taxa de descarte (P<0,05; 41,2 vs. 21,8%) do que as vacas ciclando. Vacas diagnosticadas com cisto na sétima semana pós-parto apresentaram recuperação espontânea, embora o intervalo parto-concepção e a taxa de descarte tenham sido maiores para essas vacas.
Collapse
|
18
|
Hayashi KG, Matsui M, Shimizu T, Sudo N, Sato A, Shirasuna K, Tetsuka M, Kida K, Schams D, Miyamoto A. The absence of corpus luteum formation alters the endocrine profile and affects follicular development during the first follicular wave in cattle. Reproduction 2008; 136:787-97. [DOI: 10.1530/rep-07-0480] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
We previously established a bovine experimental model showing that the corpus luteum (CL) does not appear following aspiration of the preovulatory follicle before the onset of LH surge. Using this model, the present study aimed to determine the profile of follicular development and the endocrinological environment in the absence of CL with variable nadir circulating progesterone (P4) concentrations during the oestrous cycle in cattle. Luteolysis was induced in heifers and cows and they were assigned either to have the dominant follicle aspirated (CL-absent) or ovulation induced (CL-present). Ultrasound scanning to observe the diameter of each follicle and blood collection was performed from the day of follicular aspiration or ovulation and continued for 6 days. The CL-absent cattle maintained nadir circulating P4throughout the experimental period and showed a similar diameter between the largest and second largest follicle, resulting in co-dominant follicles. Oestradiol (E2) concentrations were greater in the CL-absent cows than in the CL-present cows at day −1, day 1 and day 2 from follicular deviation. The CL-absent cows had a higher basal concentration, area under the curve (AUC), pulse amplitude and pulse frequency of LH than the CL-present cows. After follicular deviation, the CL-absent cows showed a greater basal concentration, AUC and pulse amplitude of growth hormone (GH) than the CL-present cows. These results suggest that the absence of CL accompanying nadir circulating P4induces an enhancement of LH pulses, which involves the growth of the co-dominant follicles. Our results also suggest that circulating levels of P4and E2affect pulsatile GH secretion in cattle.
Collapse
|
19
|
Monniaux D, Clemente ND, Touzé JL, Belville C, Rico C, Bontoux M, Picard JY, Fabre S. Intrafollicular steroids and anti-mullerian hormone during normal and cystic ovarian follicular development in the cow. Biol Reprod 2008; 79:387-96. [PMID: 18448844 DOI: 10.1095/biolreprod.107.065847] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Development of follicular cysts is a frequent ovarian dysfunction in cattle. Functional changes that precede cyst formation are unknown, but a role for anti-Müllerian hormone (AMH) in the development of follicular cysts has been suggested in humans. This study aimed to characterize intrafollicular steroids and AMH during follicular growth in a strain of beef cows exhibiting a high incidence of occurrence of follicular cysts. Normal follicular growth and cyst development were assessed by ovarian ultrasonography scanning during the 8 days before slaughtering. Experimental regression of cysts was followed by rapid growth of follicles that reached the size of cysts within 3-5 days. These young cysts exhibited higher intrafollicular concentrations of testosterone, estradiol-17beta, and progesterone than large early dominant follicles did in normal ovaries, but they exhibited similar concentrations of AMH. Later-stage cysts were characterized by hypertrophy of theca interna cells, high intrafollicular progesterone concentration, and high steroidogenic acute regulatory protein mRNA expression in granulosa cells. Progesterone and AMH concentrations in the largest follicles (> or =10 mm) and cysts were negatively correlated (r = -0.45, P < 0.01). Smaller follicles (<10 mm) exhibited higher intrafollicular testosterone and estradiol-17beta concentrations in ovaries with cysts compared to normal ovaries. During follicular growth, AMH concentration dropped in follicles larger than 5 mm in diameter and in a similar way in ovaries with and without cysts. In conclusion, enhanced growth and steroidogenesis in antral follicles <10 mm preceded cyst formation in cow ovaries. Intrafollicular AMH was not a marker of cystic development in the cow, but low AMH concentrations in cysts were associated with luteinization.
Collapse
Affiliation(s)
- Danielle Monniaux
- Physiologie de la Reproduction et des Comportements, UMR 6175, INRA-CNRS-Université de Tours-Haras Nationaux, 37380 Nouzilly, France.
| | | | | | | | | | | | | | | |
Collapse
|
20
|
Vanholder T, Opsomer G, de Kruif A. Aetiology and pathogenesis of cystic ovarian follicles in dairy cattle: a review. ACTA ACUST UNITED AC 2006; 46:105-19. [PMID: 16597418 DOI: 10.1051/rnd:2006003] [Citation(s) in RCA: 150] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2005] [Accepted: 12/05/2005] [Indexed: 11/14/2022]
Abstract
Cystic ovarian follicles (COF) are an important ovarian dysfunction and a major cause of reproductive failure in dairy cattle. Due to the complexity of the disorder and the heterogeneity of the clinical signs, a clear definition is lacking. A follicle becomes cystic when it fails to ovulate and persists on the ovary. Despite an abundance of literature on the subject, the exact pathogenesis of COF is unclear. It is generally accepted that disruption of the hypothalamo-pituitary-gonadal axis, by endogenous and/or exogenous factors, causes cyst formation. Secretion of GnRH/LH from the hypothalamus-pituitary is aberrant, which is attributed to insensitivity of the hypothalamus-pituitary to the positive feedback effect of oestrogens. In addition, several factors can influence GnRH/LH release at the hypothalamo-pituitary level. At the ovarian level, cellular and molecular changes in the growing follicle may contribute to anovulation and cyst formation, but studying follicular changes prior to cyst formation remains extremely difficult. Differences in receptor expression between COF and dominant follicles may be an indication of the pathways involved in cyst formation. The genotypic and phenotypic link of COF with milk yield may be attributed to negative energy balance and the associated metabolic and hormonal adaptations. Altered metabolite and hormone concentrations may influence follicle growth and cyst development, both at the level of the hypothalamus-pituitary and the ovarian level.
Collapse
Affiliation(s)
- Tom Vanholder
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | | | | |
Collapse
|