-
Journal of Proteomics Jul 2020Canine pyometra is a common inflammatory disease of uterus in sexually mature bitches caused by secondary bacterial infection, leading to change in plasma proteins...
Canine pyometra is a common inflammatory disease of uterus in sexually mature bitches caused by secondary bacterial infection, leading to change in plasma proteins associated with the innate immune system. Proteomic investigation is increasingly being applied to canine diseases in order to identify and quantify significant changes in the plasma proteome. The aim of the study was to assess and quantify changes in plasma proteome profiles of healthy dogs and pyometra affected bitches using a TMT-based high-resolution quantitative proteomic approach. As a result, 22 proteins were significantly down-regulated including transthyretin, antithrombin, retinol-binding protein, vitamin D binding protein, paraoxonase 1, and kallikrein, while 16 were significantly up-regulated including haptoglobin light chain, alpha-1-acid glycoprotein, C-reactive protein precursor, and lipopolysaccharide-binding protein in dogs with pyometra. Pathway analysis indicated that acute inflammatory response, regulation of body fluid levels, protein activation cascade, the humoral immune response, and phagocytosis were affected in pyometra. Validation of biological relevance of the proteomic study was evident with significant increases in the concentrations of haptoglobin, C-reactive protein, alpha-1-acid glycoprotein, and ceruloplasmin by immunoassay. Pyometra in bitches was shown to stimulate an increase in host defence system proteins in response to inflammatory disease including the acute phase proteins. SIGNIFICANCE: The label-based high-resolution quantitative proteomics analysis and bioinformatic approach used in this study provide insight into the complex pathophysiology of inflammation associated with pyometra revealing proteins with biomarker potential. Early diagnosis and therapeutic intervention may prevent severe complications associated with advancing sepsis in dogs with pyometra. Therefore the identification of diagnostic biomarkers that, after clinical validation may be used in veterinary practice and protein relevant to pathways responding to disease are important findings of the study. Data are available via ProteomeXchange with identifier PXD015951.
Topics: Acute-Phase Reaction; Animals; C-Reactive Protein; Dog Diseases; Dogs; Female; Humans; Proteome; Proteomics; Pyometra
PubMed: 32416315
DOI: 10.1016/j.jprot.2020.103817 -
Topics in Companion Animal Medicine Mar 2021Pyometra management in the high quality, high volume spay-neuter (HQHVSN) environment is not well documented. The goal of this study was to identify pyometra management...
Pyometra management in the high quality, high volume spay-neuter (HQHVSN) environment is not well documented. The goal of this study was to identify pyometra management practices and patient outcomes in the HQHVSN environment. An electronic survey was piloted and distributed to HQHVSN clinics using Survey Monkey via email lists and social media. A total of 118 responses were received from June to July 2020. Respondents were distributed across the United States with the majority of clinics associated with a shelter (75%). Clinics performed a median of 25 spays and neuters per day and 5000 per year. Most clinics (86%) were willing to treat nonincidental pyometras at least sometimes, and nearly all of these clinics (97%) were willing to accept pyometra referrals. Of these clinics, nearly all (95%) felt they had the necessary resources to treat most pyometras that presented and that a pyometra case was only modestly disruptive to their surgery flow. Most clinics (70%) charged a fee for treatment, charging a median of $200 for dogs and $125 for cats. This is much lower as compared to the estimated ranges for private practice ($600-$2500) and emergency hospitals ($1500-$3579). The majority of patients that HQHVSN clinics accepted for treatment were seen the same day (50%) or next day (42%). These clinics estimated that of the animals who presented, 76% were BAR or QAR, 20% were depressed or nonambulatory, and 4% were obtunded and lateral. Estimated survival for these treated groups were 98%, 80%, and 38%, respectively. HQHVSN clinics may represent a resource for treating pyometras when treatment is disruptive to the schedule of a private practice or clients present with financial limitations. There is an opportunity for HQHVSN and private practice to form a partnership to leverage the strengths of both models and improve access to care for pets.
Topics: Anesthesia; Animals; Cat Diseases; Cats; Dog Diseases; Dogs; Female; Hysterectomy; Postoperative Care; Pyometra; Surveys and Questionnaires; United States; Uterus; Veterinary Medicine
PubMed: 33249239
DOI: 10.1016/j.tcam.2020.100499 -
Tissue & Cell Dec 2020We investigated uterine histopathological and ultrastructural changes in female dogs with pyometra induced by Escherichia coli (E. coli) inoculation using progesterone...
BACKGROUND
We investigated uterine histopathological and ultrastructural changes in female dogs with pyometra induced by Escherichia coli (E. coli) inoculation using progesterone and/or estradiol.
METHODS
Dogs were ovariectomized and classified into six groups: Groups 1-6 corresponding to estradiol treatment followed by progesterone supplementation, progesterone supplementation only, estradiol supplementation only, simultaneous treatment using estradiol and progesterone, similar to Group 1 but with a double dose, and control group, respectively.
RESULTS
Pyometra was successfully induced in Groups 1, 2, 4, and 5, but not in Group 3. An uneven endometrial surface was observed, along with a purulent discharge, bleeding, inflammatory lesions, cystic endometrial hyperplasia (CEH) or cystic endometrial atrophy. Endometrial thickness percentage, uterine wall thickness, and the percentage of endometrial cyst area increased. Endometrial epithelial mushroom-like hyperplasia and the honeycomb-like structure exposed under the epithelium after flaky exfoliation were found, and the glandular epithelial villi became longer or shorter. Mitochondria expansion and increased lysosome were observed. Endoplasmic reticulum dilation and swelling and many inflammatory cells, especially plasma cell infiltration in the stroma, were found.
CONCLUSIONS
Endometrial histopathology and ultrastructural changes in affected dogs were accompanied by induction of pyometra, and they were affected by different hormonal patterns and E. coli.
Topics: Animals; Dogs; Endometrium; Epithelial Cells; Escherichia coli; Estradiol; Female; Progesterone; Pyometra
PubMed: 32835946
DOI: 10.1016/j.tice.2020.101414 -
BMC Veterinary Research Jun 2023The main aim of this report was to investigate and compare the response of serum C-reactive protein (CRP) and ferritin, two positive acute phase proteins (APPs) which...
The main aim of this report was to investigate and compare the response of serum C-reactive protein (CRP) and ferritin, two positive acute phase proteins (APPs) which usually show an increase in inflammatory processes, in dogs with pyometra. For this purpose, two different studies were made. In the first one , both proteins were measured together in an APPs profile in 25 dogs with pyometra, 25 dogs with pancreatitis (as an example of a positive inflammatory control group), and in 25 healthy dogs. In the second study, to advance the knowledge of the changes and evolution of serum ferritin and CRP in dogs with pyometra after treatment, the concentrations of both APPs were analyzed in 30 dogs with pyometra at diagnosis and after ovariohysterectomy and in 10 clinically healthy female dogs before and after elective spaying. In both studies, bitches with pyometra showed significant increases in serum CRP, indicating an inflammatory condition, but not in serum ferritin despite being a moderate positive APP. This divergence between the dynamics of these APPs could be a useful tool for the suspicion of cases of canine pyometra.
Topics: Dogs; Animals; Female; Pyometra; C-Reactive Protein; Ferritins; Hysterectomy; Dog Diseases
PubMed: 37344860
DOI: 10.1186/s12917-023-03630-3 -
Veterinary Immunology and... Oct 2017Neutrophils are capable of releasing their DNA in response to infectious agents to form neutrophil extracellular traps (NETs) to destroy pathogens. Even though pyometra...
Neutrophils are capable of releasing their DNA in response to infectious agents to form neutrophil extracellular traps (NETs) to destroy pathogens. Even though pyometra in queens and bitches is a common disease, its pathogenesis is not fully understood. The aim of this study was to assess the presence of NETs in the endometrium of queens and bitches suffering from pyometra. Pyometra and normal uteri were obtained after ovariohysterectomy from adult queens and bitches in diestrus. Uterine contents were evaluated for bacterial isolation and identification and for NETs presence. Escherichia coli were isolated in 5/5 queens and 4/5 bitches, and Streptococcus spp in one bitch. Sterile glass coverslips were placed on the endometrium surface to obtain material for NETs that were evaluated by immunocytochemistry (histone, neutrophil elastase or myeloperoxidase), fluorescence microscopy or scanning electron microscopy. NETs in endometrium content were positively stained by DNA histone DAPI, myeloperoxidase and by neutrophil elastase. NETs were spread in all observed queen and bitch endometria of pyometra cases. Ultrastructure images of NETs depicted clusters of globular material with fine filaments deposited on or around thick filaments and trapped bacteria. To the best of our knowledge these are the first findings confirming NETs endometrial presence in queen and bitch pyometra. Nevertheless, the precise role of NETs in pyometra in the bitch and queen, either to contribute to the defeat of infection or to its persistence remains to be unraveled.
Topics: Animals; Dog Diseases; Dogs; Endometrium; Escherichia coli; Extracellular Traps; Female; Microscopy, Electron, Scanning; Microscopy, Fluorescence; Pyometra; Streptococcus
PubMed: 29042016
DOI: 10.1016/j.vetimm.2017.09.001 -
Domestic Animal Endocrinology Jul 2021Diestrus is associated with insulin resistance in bitches and pyometra can further impair insulin sensitivity. This study aimed to compare insulin sensitivity, insulin...
Diestrus is associated with insulin resistance in bitches and pyometra can further impair insulin sensitivity. This study aimed to compare insulin sensitivity, insulin binding, and tyrosine kinase activity in bitches in anestrus, diestrus, or with pyometra. Patients submitted to elective ovariohysterectomy were divided into anestrus (n = 11) or diestrus (n = 13) according to reproductive history, vaginal cytology, and uterine histology. The group pyometra (n = 8) included bitches diagnosed with the disease based on clinical presentation and abdominal ultrasound findings and further confirmed by uterine histopathology. All patients were submitted to an intravenous glucose tolerance test (IVGTT) before ovariohysterectomy, and rectus abdominis muscle samples were collected during surgery for plasmatic membrane suspension preparation. Muscle-membranes were submitted to cold saturation insulin binding assay for dissociation constant (Kd) and maximum binding capacity (Bmax) determination, as well as exogenous substrate Poly (Glu: Tyr 4:1) phosphorylation assay for basal tyrosine kinase evaluation. Bitches with pyometra showed higher basal insulin (P < 0.001) and higher area under the curve (AUC) for insulin (P = 0.01) and glucose (P < 0.001) response during the IVGTT in comparison with bitches in anestrus or diestrus. Diestrus (P < 0.0001) and pyometra (P = 0.001) were associated with reduced tyrosine kinase activity in comparison with anestrus. No differences were documented in Kd and Bmax results for the low-affinity/high-capacity insulin receptors; however, high-affinity/low-capacity insulin receptors showed higher Kd and Bmax results in bitches in diestrus or with pyometra (P < 0.05) in comparison with anestrus. Despite the pyometra group showed the highest Kd values (P < 0.01), its Bmax results did not differ from the diestrus group (P > 0.05). Diestrus' higher Kd values and reduced tyrosine kinase activity in muscle tissue were compensated by increased total insulin binding capacity. Absent differences in IVGTT results between diestrus and anestrus bitches corroborate this finding. However, in bitches with pyometra, the highest Kd values were not compensated by increased total insulin binding capacity. This finding was associated with insulin resistance and glucose intolerance in IVGTT results. Moreover, pyometra resolution restored insulin sensitivity and glucose tolerance. These features can play a key role in pyometra-associated CDM, as well as in diabetic remission after pyometra resolution.
Topics: Animals; Dog Diseases; Dogs; Female; Insulin Resistance; Insulins; Muscles; Phosphorylation; Protein-Tyrosine Kinases; Pyometra
PubMed: 33866106
DOI: 10.1016/j.domaniend.2021.106626 -
Medicina Clinica Oct 2021
Topics: Female; Humans; Pyometra; Uterine Diseases
PubMed: 33143862
DOI: 10.1016/j.medcli.2020.08.007 -
Journal of Obstetrics and Gynaecology... Dec 2022
Topics: Female; Humans; Pyometra; Spontaneous Perforation; Uterine Perforation; Rupture, Spontaneous
PubMed: 35595644
DOI: 10.1016/j.jogc.2020.09.027 -
Animal Reproduction Science Aug 2023The aim of this study was to diagnose pyometra and related sepsis status using cost-effective nutritional-immunological indices, antioxidants, and toxin levels in dogs...
The aim of this study was to diagnose pyometra and related sepsis status using cost-effective nutritional-immunological indices, antioxidants, and toxin levels in dogs and to investigate the utility of the indices in predicting toxin and antioxidant status. A total of 29 dogs were enrolled into the present study. Among these, 9 female dogs in their diestrus stages, were allocated for elective ovariohysterectomy. The pyometra group was also separated into two subgroups as Sepsis (+) and Sepsis (-). Blood samples were collected into two tubes containing EDTA for hematological analysis; without anticoagulant for serum progesterone, LPS concentration, and antioxidant levels at the time of diagnosis. Bacteriological and tissue samples of the uterus were collected after the ovariohysterectomy. Antioxidant activity, progesterone, and toxin concentration were determined by using commercial ELISA kits. Statistical analyses were performed using Stata version 16.1 and MedCalc 16 statistical software. Receiver operating characteristics curves were used for the threshold for evaluating pyometra and sepsis status. Pairwise comparisons were carried out of the area under the curve (AUC) for thresholds of nutritional immunologic indices (hemoglobin, albumin, lymphocyte, platelet (HALP) score; prognostic nutritional index (PNI); Albumin hemoglobin index (AHI)), serum LPS and antioxidant activity. Linear regression model was used for the estimation of serum LPS and antioxidant activity by using indices. Mean serum progesterone, LPS concentrations, and Nitric Oxide (NO) production were greater, while serum superoxide dismutase (SOD), tissue SOD, and glutathione peroxidase (GPx) activities were lower in dogs with pyometra. All nutritional-immunologic indices were lower in pyometra cases. Nutritional-immunologic indices (AUC of HALP:0.759; PNI:0.981; AHI 0.994), NO (AUC: 0.787) and SOD (AUC: 0.784) levels were useful for pyometra diagnosis. AHI and LPS were useful for the determination of sepsis status with the AUC values of 0.850 and 0.740, respectively. While AHI was useful for the estimation of serum LPS and NO concentration (p < 0.001), PNI was useful for serum SOD concentration (p = 0.003). In conclusion, PNI, HALP and AHI can be used in the diagnosis of pyometra, however, only AHI and LPS levels can be used in the diagnosis of sepsis. SOD and NO can be used to determine pyometra but have no effect on determining sepsis status. Additionally, the estimation of the levels of serum LPS, NO, and SOD activities can be done using the AHI and PNI values.
Topics: Dogs; Female; Animals; Pyometra; Antioxidants; Escherichia coli; Lipopolysaccharides; Progesterone; Nutrition Assessment; Sepsis; Albumins; Superoxide Dismutase; Dog Diseases
PubMed: 37300916
DOI: 10.1016/j.anireprosci.2023.107276 -
Microorganisms Dec 2022Despite its clinical relevance, the pathogenesis of canine pyometra remains poorly understood. To date, it is recognized as a non-transmissible infectious disease. In...
Despite its clinical relevance, the pathogenesis of canine pyometra remains poorly understood. To date, it is recognized as a non-transmissible infectious disease. In this study, the simultaneous occurrence of pyometra and in two cohabitant female dogs underwent in-depth investigation due to the hypothesis of transmission between these animals. Two 5-year-old Chow Chow dogs (namely, dogs 23 and 24-D23 and D24) were referred to a veterinary hospital with suspected pyometra. Both animals showed prostration, anorexia, and purulent vulvar discharge over a 1-week period. After ovariohysterectomy, uterine tissue, uterine contents, and rectal swabs were collected for histopathological and microbiological analysis. Uterine histology demonstrated purulent material and multifocal necrosis with endometrial ulceration, and a morphological diagnosis of pyometra was confirmed. Furthermore, from the same phylogroup (B2) and positive for the same virulence factors with the same antimicrobial susceptibility profile was isolated from the uterine contents of both dogs and the rectum of D23. Conversely, the strains recovered from D24 differed in phylogroup (one isolate), virulence factors (all three isolates), and antimicrobial susceptibility (all three isolates). Enterobacterial repetitive intergenic consensus polymerase chain reaction (ERIC-PCR) suggested that all isolates from the uterine content of both dogs and the rectal swab of D23 were 100% the same, but different from all isolates in the rectal swab of D24. One isolate from the uterine content of each animal as well as rectal swabs were subjected to whole-genome sequencing (WGS). Both whole-genome multilocus sequence typing(wgMLST) and single-nucleotide polymorphism (SNP) analysis supported the hypothesis that the isolates from the uterine content of both animals and the rectal swab of D23 were clonal. Taken together, these clinical features, pathology, microbiology, and molecular findings suggest, to the best of our knowledge, the first transmission of associated with pyometra between two animals. These results could impact the management of sites where several females cohabit in the same local area such as kennels.
PubMed: 36557718
DOI: 10.3390/microorganisms10122465