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Sandra Schöniger, Hilke Gräfe, Franziska Richter, Heinz-Adolf Schoon
The enzyme indoleamine 2,3-dioxygenase 1 (IDO1) acts immunomodulatory and restricts bacterial growth. In the uterus of women and mice, it likely contributes to tissue homeostasis and disease pathogenesis. Pregnancy failure in mares is often caused by endometritis and endometrosis. The pathogenesis of nonsuppurative endometritis and endometrosis is still uncertain. To the authors' knowledge, no information on IDO1 expression in the equine endometrium is published. Aim of this study was to examine the presence of IDO1 as transcripts and proteins in the healthy and diseased endometrium of 25 mares and to determine its cellular expression...
March 5, 2018: Research in Veterinary Science
Maria Rosa Rebordão, Ana Amaral, Karolina Lukasik, Anna Szóstek-Mioduchowska, Pedro Pinto-Bravo, António Galvão, Dariusz J Skarzynski, Graça Ferreira-Dias
Neutrophil extracellular traps (NETs) are DNA complexes carrying nuclear and cytoplasmic proteins, such as elastase (ELA), cathepsin-G (CAT) and myeloperoxidase (MPO). Mare endometrosis is a chronic degenerative process characterized by excessive collagen in endometrium. While NETs fight bacteria that cause endometritis, they may trigger endometrial fibrogenesis. The aim was to evaluate the in vitro effect of some NETs components on mare endometrial fibrogenesis and determine its relationship with histopathology or estrous cycle...
February 7, 2018: Theriogenology
Xiaoli Chen, Yan Jiang, Dianling Pan
The present study aimed to investigate the role of miR-30c in endometriosis (EMs) and the underlying mechanism. The expression of miR-30c and plasminogen activator inhibitor type 1 (PAI-1) mRNA in EMs tissues was detected by reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and the expression of PAI-1 protein was detected by western blot analysis. The proliferation, migration, invasion and adhesion of endometrial stromal cells (ESCs) in different groups transfected with miR-30c mimic or inhibitor were compared...
November 2017: Experimental and Therapeutic Medicine
Monika Sikora, Marcin Nowak, Henryk Racheniuk, Katarzyna Wojtysiak, Roland Kozdrowski
INTRODUCTION: Endometritis and endometrosis have been and still are the major reasons for infertility in mares. The diagnosis of endometritis can be based on cytology and microbiology, but endometrial biopsy is still the only way to diagnose endometrosis in the mare. Our study attempted to determine if a single biopsy using his-topathology and immunohistochemistry is sufficient to ascertain reasons for infertility in Icelandic mares. The objectives of this study were to examine the relationship between deviations in endometrial biopsies in terms of prostaglandin-endoperoxide synthase-2 (PTGS-2) and fibronectin expression and polymorphonuclear cells (PMNs) infiltration, as well as scoring degeneration in two endometrial biopsies...
2017: Folia Histochemica et Cytobiologica
Sandra Schöniger, Hilke Gräfe, Heinz-Adolf Schoon
Subfertility in mares is mainly caused by endometrial diseases. Alterations of Toll-like receptors (TLRs) are associated with endometrial disorders in women. This study investigated TLRs 2, 4 and 6 in the equine endometrium. Endometria of 21 mares were examined by histology, PCR and immunohistochemistry. Tissues from 2 mares were considered normal. The remaining showed endometritis, endometrosis and/or angiosclerosis. TLRs 2, 4 and 6 were expressed as transcripts and proteins in all endometria. Immunohistochemistry detected TLRs 2, 4 and 6 in mast cells, luminal and glandular epithelial cells, stromal cells, endothelia, vascular smooth muscle and/or inflammatory cells...
March 2017: Veterinary Immunology and Immunopathology
Sandra Schöniger, Denny Böttcher, Tobias Theuß, Heinz-Adolf Schoon
Endometrial epithelial cells form a luminal barrier and are exposed to pathogens and non-infectious antigens. Toll-like receptors (TLRs) mediate pathogen defenses and tissue homeostasis, but are also involved in the pathogenesis of inflammatory and fibrosing alterations. Endometrial diseases are important causes of subfertility in mares. The pathogenesis of some types of persistent inflammation and periglandular fibrosis (endometrosis) is unknown. The aim of this study was to compare by in situ and in vitro immunohistochemistry the expression of TLRs 2, 4 and 6 in equine endometrial epithelial cells...
June 2017: Research in Veterinary Science
Anna Lena Grimm, Heinz-Adolf Schoon, Sandra Schöniger
Equine endometritis eosinophilica (EE) is rarely described and its diagnostic criteria are not defined. The aim of this study was to characterize histological features of EE. A data base (1995-2013) was searched for biopsies with increased eosinophils. This study included all biopsies with this diagnosis and representative biopsies without this record. The definition of equine EE was based on criteria for EE in women and the results of the determination of physiological numbers of eosinophils within the equine endometrium...
January 20, 2017: Histology and Histopathology
Igor F Canisso, Jamie Stewart, Marco A Coutinho da Silva
Endometritis was rated as the third most common medical problem encountered in adult horses in North America. It is the leading cause of subfertility in broodmares and is a major contributor to economic loss in the horse breeding industry, with pregnancy rates reported to be as low as 21% in mares with severe endometritis. Endometritis may be categorized as: endometrosis (chronic degenerative endometritis), acute, chronic, active, dormant, subclinical, clinical, and persistent post-breeding. These classifications are not mutually exclusive, and mares may change categories within breeding seasons or estrous cycles or may fit in multiple classifications...
December 2016: Veterinary Clinics of North America. Equine Practice
Henning Otzen, Harald Sieme, Harriëtte Oldenhof, Franziska Ertmer, Anne Kehr, Kristina Rode, Kristin Klose, Karl Rohn, Heinz-Adolf Schoon, Burkhard Meinecke
In this study, endometrosis and angiosclerosis in mares were studied. Endometrosis is a severe, progressive, and irreversible fibrotic condition that affects the endometrium, whereas angiosclerosis refers to thickening of vessel walls due to degenerative changes leading to reduced elasticity of the walls and lower perfusion. Histologic evaluations were performed on biopsies and compared with vascular features of the endometrial surface obtained via narrow-band imaging (NBI) hysteroscopy. First, it was determined if hysteroscopic evaluation of the endometrium using NBI resulted in a better visualization of the vascular pattern (i...
October 1, 2016: Theriogenology
Qin Zhu, Yingying Lu, Yamin Rao, Yan Ning, Yuqing Qu, Li Wang, Xianrong Zhou
OBJECTIVE: To clarify the clinicopathological features of ovarian clear cell carcinoma derived from endometriotic cyst (EC-OCCC). METHODS: Totally 54 cases of EC-OCCC were recruited in the current retrospective study. The relation between ages, clinical symptoms and signs, surgical and pathological stages, serum CA125, findings of ultrasound, treatments and the sites of tumors, macro- and micro-features and expression of immunostainings were analyzed. RESULTS: (1) Clinical features: the ages of patients were (50±6) years old (range 31-62 years old)...
November 2015: Zhonghua Fu Chan Ke za Zhi
Jessica A Kendziorski, Scott M Belcher
The aim of this study was to compare effects of bisphenol A (BPA) on collagen accumulation in uteri of two mouse strains. Adult C57Bl/6N and CD-1 mice were exposed to dietary BPA (0.004-40mg/kg/day) or 17α-ethinyl estradiol (0.00002-0.001mg/kg/day) as effect control. An equine endometrosis-like phenotype with increased gland nesting and periglandular collagen accumulation was characteristic of unexposed C57Bl/6N, but not CD-1, endometrium. BPA non-monotonically increased gland nest density and periglandular collagen accumulation in both strains...
December 2015: Reproductive Toxicology
Peter S Y Yu, Alan D L Sihoe
A 44-year-old non-smoking woman presented with recurrent right spontaneous pneumothorax 9 years after a right-side surgical pleurodesis via a video-assisted thoracic surgery (VATS) approach for suspected primary pneumothorax in another center. Histological examination of tissue excised during the earlier operation confirmed catamenial pneumothorax, but no further treatment was given. During the 9 years since, she had had persistent right lower chest pain and chest X-ray (CXR) had shown a "persistently elevated right diaphragm", but these had been treated as iatrogenic neuropathic pain and phrenic nerve palsy respectively...
May 2015: Journal of Thoracic Disease
Helen J Kilgenstein, Sandra Schöniger, Doris Schoon, Heinz-Adolf Schoon
After their retirement from sports, performance mares often show a poor breeding success. The objective of this study was the microscopic evaluation of endometrial biopsies of retired sports mares (n = 189) to search for alterations that may explain subfertility. Mares of this study aged 3-23 years showed endometritis (30%) and endometrosis (77%); mild forms predominated. In regard to those mares biopsied during the breeding season (n = 99), 50% had glandular differentiation disorders, i.e. glandular inactivity (8%) or irregular glandular differentiation (42%)...
April 2015: Research in Veterinary Science
Bruna Corradetti, Alessio Correani, Alessio Romaldini, Maria Giovanna Marini, Davide Bizzaro, Claudia Perrini, Fausto Cremonesi, Anna Lange-Consiglio
Amniotic membrane-derived mesenchymal cells (AMCs) are considered suitable candidates for a variety of cell-based applications. In view of cell therapy application in uterine pathologies, we studied AMCs in comparison to cells isolated from the endometrium of mares at diestrus (EDCs) being the endometrium during diestrus and early pregnancy similar from a hormonal standpoint. In particular, we demonstrated that amnion tissue fragments (AM) shares the same transcriptional profile with endometrial tissue fragments (ED), expressing genes involved in early pregnancy (AbdB-like Hoxa genes), pre-implantation conceptus development (Erα, PR, PGRMC1 and mPR) and their regulators (Wnt7a, Wnt4a)...
2014: PloS One
J Buczkowska, R Kozdrowski, M Nowak, A Raś, J Mrowiec
Equine endometrosis is a multifactorial disease considered to be a one of the most important causes of equine infertility, especially in older mares. This article reviews the current knowledge of equine endometrosis: pathogenesis, diagnosis, and optional treatment. Also describes the histomorphological and immunohistochemical characterization of endometrosis as well as potential etiological factors which may influence disease progression. Unfortunately, the etiology and pathogenesis of endometrosis still remains unclear, and consequently no effective treatment has been proposed so far...
2014: Polish Journal of Veterinary Sciences
M R Rebordão, A Galvão, A Szóstek, A Amaral, L Mateus, D J Skarzynski, G Ferreira-Dias
Endometrosis is a degenerative chronic process, characterized by paramount fibrosis development in mare endometrium. This condition is one of the major causes of subfertility/infertility in mares. As in other organs, fibrosis might be a pathologic sequel of many chronic inflammatory diseases. However, aetiology and physiopathologic mechanisms involved in endometrial fibrosis are still controversial. This review presents new hypotheses based on our newest data. As the first line of innate immune defence, systemic neutrophils arrive in the uterus at mating or in the presence of pathogens...
October 2014: Reproduction in Domestic Animals, Zuchthygiene
Michiko Hanada, Yousuke Maeda, Masa-Aki Oikawa
Uteri from 50 necropsied nonpregnant Japanese Thoroughbred brood mares (1-30 years of age) were investigated to clarify the histopathological characteristics of endometrosis in Japanese Thoroughbred mares and the distribution pattern of endometrosis lesions in the uterus as a whole. Endometrosis was observed in all animals over 6 years of age and in all of the 21 mares aged over 12 years of age. The affected mares showed elastofibrosis of arteries, veins and lymphatic vessels in the uterine wall, atrophy of the uterine smooth muscle layers and hyperplasia of collagen fibers among the smooth muscle fascicles of the myometrium, in addition to pathomorphologic features of endometrosis such as stromal endometrial fibrosis accompanied by endometrial atrophy, periglandular fibrosis and reduction of uterine glands...
2014: Journal of Equine Science
Lisley I Mambelli, Rodrigo C Mattos, Gustavo H Z Winter, Dener S Madeiro, Bruna P Morais, Eduardo Malschitzky, Maria Angélica Miglino, Alexandre Kerkis, Irina Kerkis
Mesenchymal stem cells (MSCs) due to their self-renewal potential and differentiation capacity are useful for tissue regeneration. Immunomodulatory and trophic properties of MSCs were demonstrated suggesting their use as medicinal signaling cells able to positively change local environment in injured tissue. Equine endometrosis is a progressive degenerative disease responsible for glandular alterations and endometrial fibrosis which causes infertility in mares. More precisely, this disease is characterized by phenotypic changes in the expression pattern of selected endometrial proteins...
2014: PloS One
Anna Z Szóstek, Karolina Lukasik, Antonio M Galvão, Graça M Ferreira-Dias, Dariusz J Skarzynski
The aim of the study was to characterize endometrial mRNA transcription, immunolocalization, and protein expression of interleukin (IL) 1alpha, IL1beta, IL6, and IL1RI, IL1RII, and IL6Ralpha/beta in the course of endometrosis during the estrous cycle. Additionally, the influence of IL1alpha, IL1beta, and IL6 on prostaglandin (PG) secretion and PG synthase mRNA transcription in endometrial tissue during endometrosis was investigated. The endometrial samples were obtained at the early (n = 12), mid- (n = 12), and late (n = 12) luteal phases and at the follicular (n = 12) phase of the estrous cycle...
October 2013: Biology of Reproduction
W Overbeck, K Jäger, H-A Schoon, T S Witte
Endometritis constitutes a major problem in managing broodmares. The histological occurrence of polymorphonuclear neutrophils (PMNs) in the stratum compactum of the endometrium is accepted as the reference standard to diagnose endometritis in mares. The objective of this study was to determine the distribution of PMNs within different sampling locations of the uterus by cytological examinations and to compare it with PMN numbers in endometrial biopsies of the corresponding location. Cytological and endometrial samples were obtained from 37 uteri within 2 ± 1 hours after slaughter through small incisions from five different, predefined locations of each uterus...
June 2013: Theriogenology
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