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Romagnoli S, Krekeler N, de Cramer K, Kutzler M, McCarthy R, Schaefer-Somi S. WSAVA guidelines for the control of reproduction in dogs and cats. J Small Anim Pract 2024; 65:424-559. [PMID: 38804079 DOI: 10.1111/jsap.13724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 01/19/2024] [Accepted: 02/07/2024] [Indexed: 05/29/2024]
Affiliation(s)
- S Romagnoli
- Department of Animal Medicine, Production and Health, Viale dell'Università 16, University of Padova, Legnaro, 35020, Italy
| | - N Krekeler
- Department of Biomedical Sciences, Melbourne Veterinary School, Faculty of Science, Melbourne, VIC, Australia
| | - K de Cramer
- Department of Production Animals, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, Pretoria, South Africa
| | - M Kutzler
- Dept of Animal and Rangeland Sciences, Oregon State University, 112 Withycombe Hall, Corvallis, OR, 97331, USA
| | - R McCarthy
- Department of Veterinary Clinical Sciences, Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA, 01536, United States
| | - S Schaefer-Somi
- Center for Reproduction, Vetmeduni Vienna, Veterinärplatz 1, Vienna, 1210, Austria
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Gültiken N, Yarim M, Yarim GF, Sözmen M, Anadol E, Findik M. Plasma concentration and uterine and ovarian expressions of insulin-like growth factor-2 in dogs with cystic endometrial hyperplasia-pyometra. Acta Vet Hung 2021; 69:73-79. [PMID: 33891559 DOI: 10.1556/004.2021.00013] [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: 01/22/2021] [Accepted: 03/18/2021] [Indexed: 11/19/2022]
Abstract
The objective of this study was to investigate the plasma concentrations of insulin-like growth factor-2 (IGF-2) as well as its expression in the uterus and ovary of healthy dogs and those with cystic endometrial hyperplasia (CEH)-pyometra complex. Group 1 (n = 10) included bitches with open cervix pyometra, while Group 2 (n = 7) consisted of clinically healthy bitches in dioestrus. The number of IGF-2 immunopositive interstitial cells was significantly higher in Group 1, whereas in Group 2 there were only two cases in which a few cells were IGF-2 immunopositive. IGF-2 immunopositivity was observed in the endometrial glandular epithelium in both groups. Additionally, interstitial fibroblasts and macrophages in the endometrium were also positive in Group 1. The concentration of plasma IGF-2 was higher in Group 1 than in Group 2 (P < 0.05). The concentration was positively correlated with IGF-2 expression in the endometrial glands (r = 0.926; P < 0.001) in Group 1. However, a negative correlation was present between plasma IGF-2 concentration and IGF-2 expression in the interstitial endocrine cells of the ovary in Group 1 (r = -0.652; P < 0.05). The results suggest that IGF-2 plays an important role during the inflammatory process occurring in bitches with CEH-pyometra complex as well as in the endometrium of healthy bitches in dioestrus.
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Affiliation(s)
- Nilgün Gültiken
- 1Department of Obstetrics and Gynaecology, Faculty of Veterinary Medicine, University of Ondokuz Mayis, Samsun, Turkey
| | - Murat Yarim
- 2Department of Pathology, Faculty of Veterinary Medicine, University of Ondokuz Mayis, Samsun, Turkey
| | - Gül Fatma Yarim
- 3Department of Biochemistry, Faculty of Veterinary Medicine, University of Ondokuz Mayis, Samsun, Turkey
| | - Mahmut Sözmen
- 2Department of Pathology, Faculty of Veterinary Medicine, University of Ondokuz Mayis, Samsun, Turkey
| | - Elvan Anadol
- 4Laboratory Animal Breeding and Experimental Research Center, University of Gazi, Ankara, Turkey
| | - Murat Findik
- 1Department of Obstetrics and Gynaecology, Faculty of Veterinary Medicine, University of Ondokuz Mayis, Samsun, Turkey
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AKKUŞ T. Will Aglepriston treatment in a dog affect its hormonal status throughout life? MEHMET AKIF ERSOY ÜNIVERSITESI VETERINER FAKÜLTESI DERGISI 2020. [DOI: 10.24880/maeuvfd.617006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Bilyi DD, Gerdeva AА, Samoiliuk VV, Suslova NI, Yevtushenko ID. A modern look at the molecular-biological mechanisms of breast tumours in dogs. REGULATORY MECHANISMS IN BIOSYSTEMS 2020. [DOI: 10.15421/022001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
High morbidity and increase in the number of registrations of breast tumours in dogs, their wide application as biological models, discussion of numerous questions of oncogenesis, and the lack of a uniform/unified methodological approach to the study of molecular and biological mechanisms of treatment of cancer determine the relevance of the problem of cancer both in humans and in our domestic companions. The analysis of publications allowed us to establish the following patterns of carcinogenesis. The peculiarities of the biological behaviour of breast tumours depend on their pathomorphological structure. Genetic predisposition to breast cancer is characteristic only in the single breed aspect. Environmental factors are of critical relevance to carcinogenesis : chemical pollutants initiate oncogenesis indirectly – by altering the expression of several receptors, impaired endocrine balance and direct mutagenic effects. Reproductive status plays a key role in the initiation and progression of breast tumours by reducing the expression of estrogen, progesterone and prolactin receptor genes. The inflammatory response that accompanies the neoplasia process is characterized by increased production of cytokines, cyclooxygenase-2, interleukins (IL-1, IL-6, IL-8), vascular endothelial growth receptors, and impaired hemostatic status (oxidative stress), which promotes progression of disease. In breast cancer in dogs, genomic instability leads to genomic aberrations, and subsequently, mutations that support the proliferation, survival and dissemination of neoplastic cells. The initiation and progression of mammary gland tumours is provided by cancer stem cells by disrupting the regulation of precursor cell self-renewal, which also predispose to resistance to chemotherapeutic agents, radiation, and hormonal cancer therapy. The analysis of the publications revealed the major markers of carcinogenesis that could potentially be used as biological targets for the design of modern diagnostic strategies and high-performance therapeutic protocols.
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Liu FT, Wu Z, Yan J, Norman RJ, Li R. The Potential Role of Growth Hormone on the Endometrium in Assisted Reproductive Technology. Front Endocrinol (Lausanne) 2020; 11:49. [PMID: 32117072 PMCID: PMC7033614 DOI: 10.3389/fendo.2020.00049] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 01/27/2020] [Indexed: 12/22/2022] Open
Abstract
Growth hormone (GH) has been considered as an adjuvant treatment in human assisted reproductive technology (ART) for several years. Its action was largely attributed to an improvement of ovarian function and less emphasis was paid to its role in the uterus. However, there is increasing evidence that GH and its receptors are expressed and have actions in the endometrium and may play an important role in modifying endometrial receptivity. Thus, in this review, we firstly describe the existence of GH receptors in endometrium and then summarize the effects of GH on the endometrium in clinical situations and the underlying mechanisms of GH in the regulation of endometrial receptivity. Finally, we briefly review the potential risks of GH in ART and consider rationalized use of GH treatment in ART.
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Affiliation(s)
- Fen-Ting Liu
- Ministry of Education Key Laboratory of Assisted Reproduction, Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Center of Reproductive Medicine, Peking University Third Hospital, Beijing, China
| | - Ze Wu
- Department of Reproductive Medicine, The First People's Hospital of Yunnan Province, Kunming, China
| | - Jie Yan
- Ministry of Education Key Laboratory of Assisted Reproduction, Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Center of Reproductive Medicine, Peking University Third Hospital, Beijing, China
| | - Robert J. Norman
- Robinson Research Institute and Fertility SA, University of Adelaide, Adelaide, SA, Australia
| | - Rong Li
- Ministry of Education Key Laboratory of Assisted Reproduction, Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Center of Reproductive Medicine, Peking University Third Hospital, Beijing, China
- *Correspondence: Rong Li
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6
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Tamminen T, Sahlin L, Masironi-Malm B, Dahlbom M, Katila T, Taponen J, Laitinen-Vapaavuori O. Expression of uterine oxytocin receptors and blood progesterone, 13,14-dihydro-15-Keto-Prostaglandin F 2α, and ionized calcium levels in dystocic bitches. Theriogenology 2019; 135:38-45. [PMID: 31200095 DOI: 10.1016/j.theriogenology.2019.06.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 06/02/2019] [Accepted: 06/05/2019] [Indexed: 11/19/2022]
Abstract
This study aimed to examine the etiology of canine dystocia by measuring the relative expression of oxytocin receptor (OXTR) mRNA and the concentration of serum progesterone, plasma PGF2α metabolite (PGFM), and blood ionized calcium (iCa) near term and in dystocia. Altogether 58 bitches were included in this study, 41 of which underwent cesarean section (CS). The four CS groups were based on history: complete uterine inertia (CUI; n = 7), partial uterine inertia (PUI; n = 13), obstructive dystocia (OD; n = 10), and elective cesarean section (ECS; n = 11). An additional group of medically treated dystocia without CS (MD; n = 8) and a control group (C; n = 9) with normal parturition (without CS and medical treatment) were also formed. Blood samples were taken prior to CS or medical treatment. Progesterone concentrations were highest in the ECS and a significant difference (p < 0.05) was observed between the ECS and the OD and between the ECS and the combined dystocia (CUI, PUI, OD, MD) groups (COMB). Highest concentrations of PGFM was observed in the C, the difference being significant (p < 0.05) between the C and the ECS and between the C and the COMB group. The progesterone:PGFM ratio was significantly (p < 0.05) higher in the ECS than in the C and the COMB group. No significant difference (p > 0.05) was observed in iCa concentrations between the groups. Relative OXTR mRNA expression was evaluated with real-time PCR from full-thickness uterine samples taken from the incision site during CS. The expression was highest in the ECS and the difference in expression was significant (p < 0.05) between the ECS and the OD and between ECS and the combined dystocia (CUI, PUI, OD) groups (COMB2). The study supports previous reports of decreasing progesterone and increasing PGFM during prepartum luteolysis. Upregulation of OXTR occurs near term. In obstructive dystocia, a prolonged influence of oxytocin and uterine exhaustion may lead to downregulation of OXTR. Complete primary uterine inertia may have a different etiology as no clear decrease in OXTR was observed in CUI as in OD. It remains unclear if parturition ceases because of uterine inertia or if uterine inertia occurs because of ceased parturition and desensitization of receptors.
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Affiliation(s)
- Tuire Tamminen
- Department of Production Animal Medicine, University of Helsinki, Paroninkuja 20, 04920, Saarentaus, Finland.
| | - Lena Sahlin
- Department of Women's and Children's Health, Karolinska Institutet and Karolinska University Hospital, 171 64, Solna, Sweden
| | - Britt Masironi-Malm
- Department of Women's and Children's Health, Karolinska Institutet and Karolinska University Hospital, 171 64, Solna, Sweden
| | - Merja Dahlbom
- Veterinary Clinic of Mäntsälä, Mäntymäentie 3, 04600, Mäntsälä, Finland
| | - Terttu Katila
- Department of Production Animal Medicine, University of Helsinki, Paroninkuja 20, 04920, Saarentaus, Finland
| | - Juhani Taponen
- Department of Production Animal Medicine, University of Helsinki, Paroninkuja 20, 04920, Saarentaus, Finland
| | - Outi Laitinen-Vapaavuori
- Department of Equine and Small Animal Medicine, University of Helsinki, Viikintie 49, 00790, Helsinki, Finland
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Sanders K, de Wit WL, Mol JA, Kurlbaum M, Kendl S, Kroiss M, Kooistra HS, Galac S. Abiraterone Acetate for Cushing Syndrome: Study in a Canine Primary Adrenocortical Cell Culture Model. Endocrinology 2018; 159:3689-3698. [PMID: 30219917 DOI: 10.1210/en.2018-00588] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Accepted: 09/07/2018] [Indexed: 12/26/2022]
Abstract
Abiraterone acetate (AA) is a potent inhibitor of steroidogenic enzyme 17α-hydroxylase/17,20-lyase (CYP17A1). AA is approved for the treatment of prostate cancer but could also be used to treat patients with Cushing syndrome (CS). Similar to humans, canine glucocorticoid synthesis requires CYP17A1, providing a useful animal model. The objective of this study was to preclinically investigate the effect of AA on adrenocortical hormone production, cell viability, and mRNA expression of steroidogenic enzymes in canine primary adrenocortical cell cultures (n = 9) from the adrenal glands of nine healthy dogs. The cells were incubated with AA (0.125 nM to 10 μM) for 72 hours under basal conditions and with 100 nM ACTH(1-24). Adrenocortical hormone concentrations were measured in culture medium using liquid chromatography-mass spectrometry, RNA was isolated from cells for subsequent real-time quantitative PCR analysis, and cell viability was assessed with an alamarBlue™ assay. AA reduced cortisol (IC50, 21.4 ± 4.6 nM) without affecting aldosterone under basal and ACTH-stimulated conditions. AA increased progesterone under basal and ACTH-stimulated conditions but reduced corticosterone under basal conditions, suggesting concurrent inhibition of 21-hydroxylation. AA did not affect the mRNA expression of steroidogenic enzymes and did not inhibit cell viability. In summary, primary canine adrenocortical cell culture is a useful model system for drug testing. For the treatment of CS, AA may to be superior to other steroidogenesis inhibitors due to its low toxicity. For future in vivo studies, dogs with endogenous CS may provide a useful animal model.
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Affiliation(s)
- Karin Sanders
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Wesley L de Wit
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Jan A Mol
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Max Kurlbaum
- University Hospital Würzburg, Core Unit Clinical Mass Spectrometry, Würzburg, Germany
- University Hospital Würzburg, Department of Internal Medicine I, Division of Endocrinology and Diabetology, Würzburg, Germany
| | - Sabine Kendl
- University Hospital Würzburg, Core Unit Clinical Mass Spectrometry, Würzburg, Germany
- University Hospital Würzburg, Department of Internal Medicine I, Division of Endocrinology and Diabetology, Würzburg, Germany
| | - Matthias Kroiss
- University Hospital Würzburg, Core Unit Clinical Mass Spectrometry, Würzburg, Germany
- University Hospital Würzburg, Department of Internal Medicine I, Division of Endocrinology and Diabetology, Würzburg, Germany
- Comprehensive Cancer Center Mainfranken, University of Würzburg, Würzburg, Germany
| | - Hans S Kooistra
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Sara Galac
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
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Maya-Pulgarin D, Gonzalez-Dominguez MS, Aranzazu-Taborda D, Mendoza N, Maldonado-Estrada JG. Histopathologic findings in uteri and ovaries collected from clinically healthy dogs at elective ovariohysterectomy: a cross-sectional study. J Vet Sci 2018; 18:407-414. [PMID: 27515261 PMCID: PMC5639094 DOI: 10.4142/jvs.2017.18.3.407] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 05/05/2016] [Accepted: 07/21/2016] [Indexed: 12/01/2022] Open
Abstract
Opinions on ovariohysterectomy (OHE) of bitches vary depending on region and country. In this descriptive, prospective cross-sectional study, uterine tracts and ovaries exhibiting gross pathologic findings (n = 76) were collected post-surgery from a reference population of 3,600 bitches (2.11% incidence) that underwent elective OHE during September to November 2013 and evaluated by histopathology examination. Data were evaluated by using descriptive statistics and chi-squared tests. Bitches were of crossbred background with average age 5 years (range 0.6–8.0 years) and most were nulliparous (69.7%) with no anamnesis of reproductive diseases (81.6%). Frequencies of proestrus, estrus, and diestrus were 42.1%, 6.6%, and 19.7%, respectively. The presence of mammary gland masses (5.3%) significantly correlated with histopathologic findings in ovaries and age of the bitch (p < 0.05). Predominant uterine histopathologies included cystic endometrial hyperplasia, periglandular fibrosis, lymphoplasmocytary endometritis, and adenomyosis (19.7%, 14.5%, 4.0%, and 2.6%, respectively). In ovaries, hyperplasia of rete ovarii, follicular cysts, oophoritis, adenoma of the rete ovarii, cysts of superficial structures, and granulosa cell tumors (10.5%, 10.5%, 7.9%, 4.0%, 2.6%, and 2.6%, respectively) were observed. The results reveal the presence of subclinical pathologies in healthy bitches, suggesting that OHE at an early age is beneficial for prevention of reproductive pathologies.
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Affiliation(s)
- Daniel Maya-Pulgarin
- INCA-CES Research Group, School of Veterinary Medicine and Zootechny, CES University, Medellin 050021, Colombia
| | - María Soledad Gonzalez-Dominguez
- INCA-CES Research Group, School of Veterinary Medicine and Zootechny, CES University, Medellin 050021, Colombia.,Veterinary Teaching Hospital, CES University, Envigado 0555427, Colombia
| | - Diego Aranzazu-Taborda
- Research Group on Veterinary Sciences Centauro School of Veterinary Medicine, Faculty of Agrarian Sciences, University of Antioquia, Medellin 050010, Colombia.,Laboratory of Veterinary Pathology, School of Veterinary Medicine, Faculty of Agrarian Sciences, University of Antioquia, Medellin 050010, Colombia
| | - Natalia Mendoza
- INCA-CES Research Group, School of Veterinary Medicine and Zootechny, CES University, Medellin 050021, Colombia
| | - Juan Guillermo Maldonado-Estrada
- Research Group on Veterinary Sciences Centauro School of Veterinary Medicine, Faculty of Agrarian Sciences, University of Antioquia, Medellin 050010, Colombia
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Histomorphometrics and quantitative unbiased stereology in canine uteri treated with medroxyprogesterone acetate. Theriogenology 2017; 95:105-112. [PMID: 28460663 DOI: 10.1016/j.theriogenology.2017.03.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 03/13/2017] [Accepted: 03/13/2017] [Indexed: 11/20/2022]
Abstract
This article describes the effects of MPA use on the canine uterus using stereological methods. Entire reproductive tracts were removed from normal healthy canine bitches (Canis lupus familiaris) and grouped as: nulliparous (n = 11), multiparous (n = 11) and MPA-treated (n = 11; nulliparous; two treatments; 5 mg/kg). 1 cm samples were cut from the corpus, horn and uterine tube and fixed in 10% formaldehyde. Sections of each were mounted on slides and stained with hematoxylin-eosin. We assessed the fraction area for components of endometrium and myometrium and VV (volume density) and SV (surface density) of the gland and stroma using the M36 test system provided by the STEPanizer Stereological Tool. No gross histological differences were observed between study groups in the uterine tube, uterine corpus and horn. The wall of the uterine corpus and horn in MPA-treated bitches was characterized as being thicker than in the other groups. A cross-section of the uterine corpus revealed no differences between components of uterine wall in the corpus and horn; however, differences were observed in the volume density [VV; %] in variables such as: VV[str.vasc/uterus] (nulliparous vs. multiparous; p = 0.0019) and VV[str.supravasc/uterus] (multiparous vs. nulliparous and MPA; p = 0.0035). In the endometrial gland, differences were detected in SV[gland/endom] (multiparous vs. MPA, p = 0.0442). In the uterine horn, differences were only observed in the variable VV[lumen.gland/endom] (multiparous vs. MPA; p = 0.0019). This study shows quantitative changes in the architecture of the endometrium and myometrium in all the uterine segments, mainly morphological endometrial gland changes of the uterine corpus, increasing the surface area per unit of volume; however, these changes usually do not differ quantitatively from those observed in the uterus of multiparous bitches.
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Tamminen TM, Sahlin L, Masironi B, Taponen J, Laitinen-Vapaavuori O, Katila T. Oxytocin receptors in dioestrous and anoestrous canine uteri. Reprod Domest Anim 2016; 52:153-159. [DOI: 10.1111/rda.12873] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 09/17/2016] [Indexed: 11/29/2022]
Affiliation(s)
- TM Tamminen
- Department of Production Animal Medicine; University of Helsinki; Saarentaus Finland
| | - L Sahlin
- Department of Women's and Children's Health; Karolinska Institutet; Stockholm Sweden
| | - B Masironi
- Department of Women's and Children's Health; Karolinska Institutet; Stockholm Sweden
| | - J Taponen
- Department of Production Animal Medicine; University of Helsinki; Saarentaus Finland
| | - O Laitinen-Vapaavuori
- Department of Equine and Small Animal Medicine; University of Helsinki; Helsinki Finland
| | - T Katila
- Department of Production Animal Medicine; University of Helsinki; Saarentaus Finland
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Hull KL, Harvey S. Growth hormone and reproduction: a review of endocrine and autocrine/paracrine interactions. Int J Endocrinol 2014; 2014:234014. [PMID: 25580121 PMCID: PMC4279787 DOI: 10.1155/2014/234014] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Accepted: 11/26/2014] [Indexed: 01/01/2023] Open
Abstract
The somatotropic axis, consisting of growth hormone (GH), hepatic insulin-like growth factor I (IGF-I), and assorted releasing factors, regulates growth and body composition. Axiomatically, since optimal body composition enhances reproductive function, general somatic actions of GH modulate reproductive function. A growing body of evidence supports the hypothesis that GH also modulates reproduction directly, exerting both gonadotropin-dependent and gonadotropin-independent actions in both males and females. Moreover, recent studies indicate GH produced within reproductive tissues differs from pituitary GH in terms of secretion and action. Accordingly, GH is increasingly used as a fertility adjunct in males and females, both humans and nonhumans. This review reconsiders reproductive actions of GH in vertebrates in respect to these new conceptual developments.
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Affiliation(s)
- Kerry L Hull
- Department of Biology, Bishop's University, Sherbrooke, QC, Canada J1M 1Z7 ; Centre de Recherche Clinique Etienne-Le Bel, Université de Sherbrooke, Sherbrooke, QC, Canada J1H 5N4
| | - Steve Harvey
- Department of Physiology, University of Alberta, Edmonton, AB, Canada T6G 2R3
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Keller KA, Nevarez JG, Rodriguez D, Gieger T, Gumber S. Diagnosis and Treatment of Anaplastic Mammary Carcinoma in a Sugar Glider (Petaurus breviceps). J Exot Pet Med 2014. [DOI: 10.1053/j.jepm.2014.06.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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13
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Kautz E, Gram A, Aslan S, Ay SS, Selçuk M, Kanca H, Koldaş E, Akal E, Karakaş K, Findik M, Boos A, Kowalewski MP. Expression of genes involved in the embryo–maternal interaction in the early-pregnant canine uterus. Reproduction 2014; 147:703-17. [DOI: 10.1530/rep-13-0648] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Although there is no acute luteolytic mechanism in the absence of pregnancy in the bitch, a precise and well-timed embryo–maternal interaction seems to be required for the initiation and maintenance of gestation. As only limited information is available about these processes in dogs, in this study, the uterine expression of possible decidualization markers was investigated during the pre-implantation stage (days 10–12) of pregnancy and in the corresponding nonpregnant controls. In addition, the expression of selected genes associated with blastocyst development and/or implantation was investigated in embryos flushed from the uteri of bitches used for this study (unhatched and hatched blastocysts). There was an upregulated expression of prolactin receptor (PRLR) and IGF2 observed pre-implantation. The expression of PRL and of IGF1 was unaffected, and neither was the expression of progesterone- or estrogen receptor β (ESR2). In contrast, (ESR1) levels were elevated during early pregnancy. Prostaglandin (PG)-system revealed upregulated expression of PGE2-synthase and its receptors, PTGER2 and PTGER4, and of the PG-transporter. Elevated levels of AKR1C3 mRNA, but not the protein itself, were noted. Expression of prostaglandin-endoperoxide synthase 2 (PTGS2) remained unaffected. Most of the transcripts were predominantly localized to the uterine epithelial cells, myometrium and, to a lesser extent, to the uterine stroma. PGES (PTGES) mRNA was abundantly expressed in both groups of embryos and appeared higher in the hatched ones. The expression level of IGF2 mRNA appeared higher than that of IGF1 mRNA in hatched embryos. In unhatched embryos IGF1, IGF2, and PTGS2 mRNA levels were below the detection limit.
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14
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Guil-Luna S, Stenvang J, Brünner N, Sánchez-Céspedes R, Millán Y, Gómez-Laguna J, de las Mulas JM. Progesterone receptor isoform analysis by quantitative real-time polymerase chain reaction in formalin-fixed, paraffin-embedded canine mammary dysplasias and tumors. Vet Pathol 2013; 51:895-902. [PMID: 24249219 DOI: 10.1177/0300985813511127] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Cloning and sequencing of the progesterone receptor gene in dogs have revealed 2 isoforms, A and B, transcribed from a single gene. Distribution of isoforms A and B in canine mammary lesions has hitherto been investigated only by Western blot analysis. This study analyzed progesterone receptor and its isoforms in formalin-fixed, paraffin-embedded tissue samples from canine mammary lesions (4 dysplasias, 10 benign tumors, and 46 carcinomas) using 1-step SYBR Green quantitative real-time polymerase chain reaction (RT-qPCR). Progesterone receptor was expressed in 75% of dysplasias, all benign tumors, and 59% of carcinomas. Carcinomas, and particularly simple epithelial-type carcinomas, displayed the lowest levels of expression. A high rate of agreement was recorded between RT-qPCR and immunohistochemical labeling. Isoforms A and B were successfully amplified, with correlation coefficients of 0.99 and amplification efficiencies close to 2, and were expressed in all lesion types analyzed. Predominance of A over B expression was observed in carcinomas and complex adenomas. Low-grade tumors exhibited higher progesterone receptor messenger RNA (mRNA) levels, but no difference was observed in the expression of isoform A versus B. Analysis of progesterone receptor mRNA isoforms by RT-qPCR was successful in routinely formalin-fixed, paraffin-embedded tissue samples and enabled the distribution of isoforms A and B to be identified for the first time in dysplasias, benign tumors, and malignant tumors of the canine mammary gland. These findings will facilitate future research into the role of progesterone receptor isoforms in the progression of canine mammary tumors.
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Affiliation(s)
- S Guil-Luna
- Department of Comparative Pathology, Veterinary Faculty, University of Córdoba, Córdoba, Spain
| | - J Stenvang
- Institute of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - N Brünner
- Institute of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - R Sánchez-Céspedes
- Department of Comparative Pathology, Veterinary Faculty, University of Córdoba, Córdoba, Spain
| | - Y Millán
- Department of Comparative Pathology, Veterinary Faculty, University of Córdoba, Córdoba, Spain
| | - J Gómez-Laguna
- Department of Comparative Pathology, Veterinary Faculty, University of Córdoba, Córdoba, Spain
| | - J Martín de las Mulas
- Department of Comparative Pathology, Veterinary Faculty, University of Córdoba, Córdoba, Spain
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15
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Gracanin A, de Gier J, Zegers K, Bominaar M, Rutteman GR, Schaefers-Okkens AC, Kooistra HS, Mol JA. Progesterone Receptor Isoforms in the Mammary Gland of Cats and Dogs. Reprod Domest Anim 2012; 47 Suppl 6:313-7. [DOI: 10.1111/rda.12045] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Accepted: 07/24/2012] [Indexed: 11/26/2022]
Affiliation(s)
- A Gracanin
- Department of Clinical Sciences of Companion Animals; Faculty of Veterinary Medicine; Utrecht University; Utrecht; The Netherlands
| | - J de Gier
- Department of Clinical Sciences of Companion Animals; Faculty of Veterinary Medicine; Utrecht University; Utrecht; The Netherlands
| | - K Zegers
- Department of Clinical Sciences of Companion Animals; Faculty of Veterinary Medicine; Utrecht University; Utrecht; The Netherlands
| | - M Bominaar
- Department of Clinical Sciences of Companion Animals; Faculty of Veterinary Medicine; Utrecht University; Utrecht; The Netherlands
| | - GR Rutteman
- Department of Clinical Sciences of Companion Animals; Faculty of Veterinary Medicine; Utrecht University; Utrecht; The Netherlands
| | - AC Schaefers-Okkens
- Department of Clinical Sciences of Companion Animals; Faculty of Veterinary Medicine; Utrecht University; Utrecht; The Netherlands
| | - HS Kooistra
- Department of Clinical Sciences of Companion Animals; Faculty of Veterinary Medicine; Utrecht University; Utrecht; The Netherlands
| | - JA Mol
- Department of Clinical Sciences of Companion Animals; Faculty of Veterinary Medicine; Utrecht University; Utrecht; The Netherlands
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16
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Pawłowski KM, Popielarz D, Szyszko K, Gajewska M, Motyl T, Król M. Growth hormone receptor (GHR) RNAi decreases proliferation and enhances apoptosis in CMT-U27 canine mammary carcinoma cell line. Vet Comp Oncol 2011; 10:2-15. [PMID: 22235976 DOI: 10.1111/j.1476-5829.2011.00269.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Canine mammary gland has been identified as a major site of the extrapituitary growth hormone (GH) production. This finding is linked to its role in tumourigenesis of the mammary gland. Our previous studies indicated the role of GH and GH receptor (GHR) in regulation of proliferation and apoptosis. Thus, we have optimized the ghr RNA interference method in canine mammary carcinoma cell line CMT-U27. We have analysed the effect of GHR reduction on the intracellular signalling and the cell cycle and apoptosis. The results showed that GHR reduction decreased the p-ERK1/2 expression and caused increase of apoptosis and decrease in number of cells at S and G2M phases. This study indicates that GHR besides proliferative effect promotes growth by increasing cell survival. It can tilt the balance between proliferation and death in cancer cells.
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Affiliation(s)
- K M Pawłowski
- Faculty of Veterinary Medicine, Department of Physiological Sciences, Warsaw University of Life Sciences - WULS, Warsaw, Poland
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17
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Aglepristone (RU534) administration to non-pregnant bitches in the mid-luteal phase induces early luteal regression. Theriogenology 2010; 74:672-81. [DOI: 10.1016/j.theriogenology.2010.03.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2009] [Revised: 03/25/2010] [Accepted: 03/25/2010] [Indexed: 11/19/2022]
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18
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Bogaert L, Heerden MV, Cock HEVD, Martens A, Chiers K. Molecular and Immunohistochemical Distinction of Equine Sarcoid From Schwannoma. Vet Pathol 2010; 48:737-41. [DOI: 10.1177/0300985810377070] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Ten equine skin tumors that had been classified as schwannomas on routine histological examination were analyzed by polymerase chain reaction for bovine papillomavirus DNA. All 10 were positive for bovine papillomavirus 1 or 2, and all 10 were immunohistochemically negative for S-100 protein and strongly positive for vimentin. Nine tumors were moderately positive for laminin and 8, for smooth muscle actin. Five tumors were variably and weakly positive for type IV collagen. The lack of S-100 protein expression made Schwann cells an unlikely cell of origin, as opposed to peripheral nerve sheath tumors, which typically express S-100 protein, at least in some neoplastic cells. The immunohistochemical reactivity is consistent with myofibroblastic origin of the neoplastic cells, although smooth muscle cell or pericyte origin cannot be ruled out. These tumors represent an atypical form of equine sarcoid. Polymerase chain reaction for bovine papillomavirus and S-100 immunohistochemistry are strongly recommended for all equine skin tumors with histological characteristics typical of schwannoma or peripheral nerve sheath tumor.
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Affiliation(s)
- L. Bogaert
- Department of Surgery and Anesthesiology of Domestic Animals, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
- Both authors contributed equally to this work
| | - M. Van Heerden
- Both authors contributed equally to this work
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - H. E. V. De Cock
- Department of Pathology, Microbiology and Immunology, School of Veterinary Medicine, University of California, Davis, California
| | - A. Martens
- Department of Surgery and Anesthesiology of Domestic Animals, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - K. Chiers
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
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19
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Diaz-Espiñeira MM, Mol JA, van den Ingh TSGAM, van der Vlugt-Meijer RH, Rijnberk A, Kooistra HS. Functional and morphological changes in the adenohypophysis of dogs with induced primary hypothyroidism: loss of TSH hypersecretion, hypersomatotropism, hypoprolactinemia, and pituitary enlargement with transdifferentiation. Domest Anim Endocrinol 2008; 35:98-111. [PMID: 18400449 DOI: 10.1016/j.domaniend.2008.03.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2007] [Revised: 03/01/2008] [Accepted: 03/02/2008] [Indexed: 11/18/2022]
Abstract
From case studies in humans it is known that primary hypothyroidism (PH) may be associated with morphological and functional changes of the pituitary. There is no insight into the time scale of these changes. In this study, seven beagle dogs were followed up for 3 years after the induction of primary hypothyroidism. Three of these dogs were followed up for another 1.5 years while receiving l-thyroxine. Adenohypophyseal function was investigated at 2-month intervals with the combined intravenous injection of CRH, GHRH, GnRH, and TRH, and measurement of the plasma concentrations of ACTH, GH, LH, PRL, and TSH. In addition, after 2 years of hypothyroidism a single TRH-stimulation test and a somatostatin test were performed, with measurements of the same pituitary hormones. Every 6 months the pituitary gland was visualized by computed tomography (CT). Induction of PH led to high plasma TSH concentrations for a few months, where after concentrations gradually declined to values no longer significantly different from pre-PH values. A blunted response to stimulation of TSH release preceded this decline. Basal plasma GH concentrations increased during PH and there was a paradoxical hyperresponsiveness to TRH stimulation. Basal GH concentrations remained elevated and returned only to low values during l-thyroxine treatment. Basal PRL concentrations decreased significantly during PH and normalized after several months of l-thyroxine treatment. The pituitary gland became enlarged in all dogs. Histomorphology and immunohistochemical studies in 4 dogs, after 3 years of PH, revealed thyrotroph hyperplasia, large vacuolated thyroid deficiency cells, and decreased numbers of mammotrophs. Several cells stained for both GH and TSH. In conclusion, with time PH led to a loss of the TSH response to low T4 concentrations, hypersecretion of GH, and hyposecretion of PRL. The enlarged pituitaries were characterized by thyrotroph hyperplasia, large vacuolated thyroid deficiency cells, and double-staining cells, which are indicative of transdifferentiation.
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Affiliation(s)
- M M Diaz-Espiñeira
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
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20
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Rao NAS, van Wolferen ME, van den Ham R, van Leenen D, Groot Koerkamp MJA, Holstege FCP, Mol JA. cDNA microarray profiles of canine mammary tumour cell lines reveal deregulated pathways pertaining to their phenotype. Anim Genet 2008; 39:333-45. [PMID: 18462483 DOI: 10.1111/j.1365-2052.2008.01733.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Mammary cancer is the most common type of cancer in female dogs with a lifetime risk of over 24% when dogs are not spayed. The elucidation of the complete canine genome opens new areas for development of cancer therapies. These should be tested first by in vitro models such as cell lines. However, to date, no canine mammary cell lines have been characterized by expression profiling. In this study, canine mammary tumour cell lines with histologically distinct primary tumours of origin were characterized using a newly developed canine cDNA microarray. Comparisons of gene expression profiles showed enrichment for distinct biological pathways and were related to biological properties of the cell lines such as growth rate and in vitro tumourigenicity. Additionally, gene expression profiles of cell lines also showed correspondence to their tumour of origin. Major differences were found in Wnt, cell cycle, cytokine/Rho-GTPase, alternative complement and integrin signalling pathways. Because these pathways show an overlap at the molecular level with those found in human breast cancer, the expression profiling of spontaneous canine mammary cancer may also function as a biological sieve to identify conserved gene expression or pathway profiles of evolutionary significance that are involved in tumourigenesis. These results are the basis for further characterization of canine mammary carcinomas and development of new therapies directed towards specific pathways. In addition these cell lines can be used to further investigate identified deregulated pathways and characterize until now unannotated genes.
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Affiliation(s)
- N A S Rao
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands.
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