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The Veterinary Clinics of North... Jul 2018Pyometra is a common disease in dogs and cats. Hormones and opportunistic bacteria are fundamental in the development, with progesterone playing a key role. The disease... (Review)
Review
Pyometra is a common disease in dogs and cats. Hormones and opportunistic bacteria are fundamental in the development, with progesterone playing a key role. The disease should be suspected in intact bitches and queens presenting with illness, and particularly if within 4 months after estrus. Early diagnosis and treatment are vital to increase chances of survival as endotoxemia and sepsis often are induced. Typical clinical signs include vaginal discharge, depression, anorexia, polyuria and polydipsia, fever and gastrointestinal disturbances. Surgical ovariohysterectomy is the safest and most effective treatment. For breeding animals with less severe illness, purely medical treatments alternatives are possible.
Topics: Animals; Cat Diseases; Cats; Dog Diseases; Dogs; Female; Hysterectomy; Ovariectomy; Pyometra
PubMed: 29933767
DOI: 10.1016/j.cvsm.2018.03.001 -
Reproduction in Domestic Animals =... Jul 2009The necessity, and in particular the timing, of gonadectomy in dogs and cats is still controversial. This is mainly because gonadectomy confers a mixture of benefits and... (Review)
Review
The necessity, and in particular the timing, of gonadectomy in dogs and cats is still controversial. This is mainly because gonadectomy confers a mixture of benefits and adverse effects that depend upon the age at neutering, sex, species and breed. In this paper, the long-term risks and benefits of gonadectomy, at various ages, in dogs and cats are reviewed using data describing the effects of desexing on the urogenital tract and on other medical conditions, such as orthopaedic diseases, immune-mediated diseases, tumour development and behaviour.
Topics: Animals; Cats; Dogs; Female; Male; Orchiectomy; Ovariectomy
PubMed: 19754532
DOI: 10.1111/j.1439-0531.2009.01437.x -
Journal of the American Veterinary... Dec 2007Elective gonadectomy of dogs and cats is one of the most common veterinary procedures in the United States. Increasingly, dog owners and members of the veterinary... (Review)
Review
Elective gonadectomy of dogs and cats is one of the most common veterinary procedures in the United States. Increasingly, dog owners and members of the veterinary profession throughout the world have questioned the optimal age for performance of these procedures and whether these procedure should even be performed as elective surgeries.
Topics: Age Factors; Animals; Behavior, Animal; Cat Diseases; Cats; Dog Diseases; Dogs; Female; Hysterectomy; Life Expectancy; Male; Orchiectomy; Ovariectomy; Population Control; Postoperative Complications; Weight Gain
PubMed: 18052800
DOI: 10.2460/javma.231.11.1665 -
Obstetrics and Gynecology May 2022To perform an updated Markov modeling to assess the optimal age for bilateral salpingo-oophorectomy (BSO) at the time of hysterectomy for benign indication. (Review)
Review
OBJECTIVE
To perform an updated Markov modeling to assess the optimal age for bilateral salpingo-oophorectomy (BSO) at the time of hysterectomy for benign indication.
METHODS
We performed a literature review that assessed hazard ratios (HRs) for mortality by disease, age, hysterectomy with or without BSO, and estrogen therapy use. Base mortality rates were derived from national vital statistics data. A Markov model from reported HRs predicted the proportion of the population staying alive to age 80 years by 1-year and 5-year age groups at time of surgery, from age 45 to 55 years. Those younger than age 50 years were modeled as either taking postoperative estrogen or not; those 50 and older were modeled as not receiving estrogen. Computations were performed with R 3.5.1, using Bayesian integration for HR uncertainty.
RESULTS
Performing salpingo-oophorectomy before age 50 years for those not taking estrogen yields a lower survival proportion to age 80 years than hysterectomy alone before age 50 years (52.8% [Bayesian CI 40.7-59.7] vs 63.5% [Bayesian CI 62.2-64.9]). At or after age 50 years, there were similar proportions of those living to age 80 years with hysterectomy alone (66.4%, Bayesian CI 65.0-67.6) compared with concurrent salpingo-oophorectomy (66.9%, Bayesian CI 64.4-69.0). Importantly, those taking estrogen when salpingo-oophorectomy was performed before age 50 years had similar proportions of cardiovascular disease, stroke, and people living to age 80 years as those undergoing hysterectomy alone or those undergoing hysterectomy and salpingo-oophorectomy at age 50 years and older.
CONCLUSION
This updated Markov model argues for the consideration of concurrent salpingo-oophorectomy for patients who are undergoing hysterectomy at age 50 and older and suggests that initiating estrogen in those who need salpingo-oophorectomy before age 50 years mitigates increased mortality risk.
Topics: Aged; Aged, 80 and over; Bayes Theorem; Estrogens; Female; Humans; Hysterectomy; Middle Aged; Ovariectomy; Salpingo-oophorectomy
PubMed: 35576331
DOI: 10.1097/AOG.0000000000004732 -
PloS One 2020In veterinary medicine, the administration of nonsteroidal anti-inflammatory analgesics (NSAIDs) for the control of postsurgical pain in dogs and cats is common given... (Comparative Study)
Comparative Study
Clinical evaluation of postoperative analgesia, cardiorespiratory parameters and changes in liver and renal function tests of paracetamol compared to meloxicam and carprofen in dogs undergoing ovariohysterectomy.
BACKGROUND
In veterinary medicine, the administration of nonsteroidal anti-inflammatory analgesics (NSAIDs) for the control of postsurgical pain in dogs and cats is common given the anti-inflammatory, analgesic, and antipyretic effects of these drugs. This study compared the serum biochemical changes and postoperative analgesic effects of paracetamol, meloxicam, and carprofen in bitches submitted to an ovariohysterectomy using the Dynamic Interactive Visual Analog Scale (DIVAS) and Pain Scale of the University of Melbourne (UMPS) scoring systems.
METHODS
Thirty bitches of different breeds underwent elective ovariohysterectomies and were randomly assigned to one of three treatment groups: a paracetamol group [15 mg kg-1 intravenous (IV)], a carprofen group (4 mg kg-1 IV), and a meloxicam group (0.2 mg kg-1 IV). All treatments were administered 30 minutes prior to surgery. Paracetamol was administered every 8 hours postoperatively for 48 hours total, while carprofen and meloxicam were intravenously administered every 24 hours. An evaluation of post-surgical pain was done with the DIVAS and the UMPS. The first post-surgical pain measurement was performed 1 hour after surgery and then 2, 4, 6, 8, 12, 16, 20, 24, 36, and 48 hours after surgery.
RESULTS
All groups exhibited a gradual reduction in pain throughout the postoperative period in both scales; however, neither scale significantly differed between the three treatment groups (P > 0.05) during the 48 postoperative hours.
CONCLUSIONS
Paracetamol was as effective as meloxicam and carprofen for post-surgical analgesia in bitches subjected to elective ovariohysterectomy. The present study demonstrates that paracetamol may be considered a tool for the effective treatment of acute perioperative pain in dogs. Furthermore, this drug led to no adverse reactions or changes in the parameters assessed in the present study, indicating its safety.
Topics: Acetaminophen; Analgesia; Animals; Anti-Inflammatory Agents, Non-Steroidal; Carbazoles; Cardiorespiratory Fitness; Dogs; Female; Hysterectomy; Kidney Function Tests; Liver Function Tests; Meloxicam; Ovariectomy; Pain, Postoperative
PubMed: 32059002
DOI: 10.1371/journal.pone.0223697 -
Redox Biology Jun 2023Ovariectomy (OVX) conducted before the onset of natural menopause is considered to bringing forward and accelerate the process of ageing-associated neurodegeneration....
Ovariectomy (OVX) conducted before the onset of natural menopause is considered to bringing forward and accelerate the process of ageing-associated neurodegeneration. However, the mechanisms underlying memory decline and other cognitive dysfunctions following OVX are unclear. Given that iron accumulates during ageing and after OVX, we hypothesized that excess iron accumulation in the hippocampus would cause ferroptosis-induced increased neuronal degeneration and death associated with memory decline. In the current study, female rats that underwent OVX showed decreased dihydroorotate dehydrogenase (DHODH) expression and reduced performance in the Morris water maze (MWM). We used primary cultured hippocampal cells to explore the ferroptosis resistance-inducing effect of 17β-oestradiol (E). The data supported a vital role of DHODH in neuronal ferroptosis. Specifically, E alleviated ferroptosis induced by erastin and ferric ammonium citrate (FAC), which can be blocked by brequinar (BQR). Further in vitro studies showed that E reduced lipid peroxidation levels and improved the behavioural performance of OVX rats. Our research interprets OVX-related neurodegeneration with respect to ferroptosis, and both our in vivo and in vitro data show that E supplementation exerts beneficial antiferroptotic effects by upregulating DHODH. Our data demonstrate the utility of E supplementation after OVX and provide a potential target, DHODH, for which hormone therapy has not been available.
Topics: Animals; Female; Rats; Dihydroorotate Dehydrogenase; Estradiol; Ferroptosis; Hippocampus; Memory Disorders; Ovariectomy
PubMed: 37116254
DOI: 10.1016/j.redox.2023.102708 -
Aging Oct 2023A rapidly aging society and longer life expectancy are causing osteoporosis to become a global epidemic. Over the last five decades, a number of drugs aimed at reducing...
A rapidly aging society and longer life expectancy are causing osteoporosis to become a global epidemic. Over the last five decades, a number of drugs aimed at reducing bone resorption or restoring bone mass have been developed, but their efficacy and safety are limited. Icaritin (ICT) is a natural compound extracted from anti-osteoporosis herb spp. and has been shown to inhibit osteoclast differentiation. However, the molecular mechanism by which ICT weaken RANKL-induced osteoclast differentiation has not been completely investigated. Here, we evaluated the anti-osteoclastogenic effect of ICT and the potential drug candidate for treating osteoporosis . study, ICT was found to inhibit osteoclast formation and bone resorption function via downregulating transcription factors activated T cell cytoplasm 1 (NFATc1) and c-fos, which further downregulate osteoclastogenesis-specific gene. In addition, the enhanced mitochondrial mass and function required for osteoclast differentiation was mitigated by ICT. The histomorphological results from an study showed that ICT attenuated the bone loss associated with ovariectomy (OVX). Based on these results, we propose ICT as a promising new drug strategy for osteoporosis that inhibits osteoclast differentiation.
Topics: Female; Humans; Osteogenesis; Cell Differentiation; Osteoporosis; Bone Resorption; Proto-Oncogene Proteins c-fos; Ovariectomy
PubMed: 37793008
DOI: 10.18632/aging.205068 -
International Journal of Molecular... Mar 2022If menopause is really independent risk factor for cardiovascular disease is still under debate. We studied if ovariectomy in the model of insulin resistance causes...
BACKGROUND
If menopause is really independent risk factor for cardiovascular disease is still under debate. We studied if ovariectomy in the model of insulin resistance causes cardiovascular changes, to what extent are these changes reversible by estradiol substitution and if they are accompanied by changes in other organs and tissues.
METHODS
Hereditary hypertriglyceridemic female rats were divided into three groups: ovariectomized at 8th week ( = 6), ovariectomized with 17-β estradiol substitution ( = 6), and the sham group ( = 5). The strain of abdominal aorta measured by ultrasound, expression of vascular genes, weight and content of myocardium and also non-cardiac parameters were analyzed.
RESULTS
After ovariectomy, the strain of abdominal aorta, expression of nitric oxide synthase in abdominal aorta, relative weight of myocardium and of the left ventricle and circulating interleukin-6 decreased; these changes were reversed by estradiol substitution. Interestingly, the content of triglycerides in myocardium did not change after ovariectomy, but significantly increased after estradiol substitution while adiposity index did not change after ovariectomy, but significantly decreased after estradiol substitution.
CONCLUSION
Vascular and cardiac parameters under study differed in their response to ovariectomy and estradiol substitution. This indicates different effects of ovariectomy and estradiol on different cardiovascular but also extracardiac structures.
Topics: Animals; Estradiol; Female; Heart; Humans; Insulin Resistance; Menopause; Ovariectomy; Rats
PubMed: 35269970
DOI: 10.3390/ijms23052825 -
Veterinary Ophthalmology May 2020To determine incidence and risk factors of post-sterilization hyphema in shelter cats.
OBJECTIVE
To determine incidence and risk factors of post-sterilization hyphema in shelter cats.
ANIMALS STUDIED
Retrospective medical record review of 1204 cats and prospective screening of 195 cats.
PROCEDURES
The study consisted of three parts: (a) Survey responses were collected from 20 veterinarians, who perform high-quality high-volume spay-neuter (HQHVSN) in both shelter and public clinic settings; (b) medical records of 1204 cats were analyzed retrospectively over a 14-month time period; and (c) ophthalmic examinations, including tonometry, were performed prospectively on 195 cats before and after sterilization surgery over 8 weeks.
RESULTS
Nine of 20 surveyed veterinarians reported having witnessed hyphema in cats following sterilization surgery. Retrospective review of 1204 medical record and prospective screening of 195 cats showed that three juvenile (<1 year of age) male cats (<2 kg) developed hyphema within 1 hour following surgery (0.2% incidence). In all three affected cats, anesthesia was induced with tiletamine/zolazepam (3 of 523 cats induced with this drug combination; 0.6% incidence), and hyphema resolved within 20 hours. Mean intraocular pressures as measured by Icare® TonoVet were (mean ± standard deviation) 11.5 ± 3.8 mm Hg and 21.7 ± 4.6 mm Hg for juvenile (<1 year of age) and adult (>1 year of age) cats, respectively.
CONCLUSIONS
Survey responses and three observed cases confirm the existence of feline post-sterilization hyphema with an estimated incidence of 0.2%. The underlying mechanism for this occurrence remains unknown.
Topics: Animals; Cats; Female; Hyphema; Hysterectomy; Incidence; Male; Michigan; Orchiectomy; Ovariectomy; Postoperative Complications; Prospective Studies; Records; Retrospective Studies
PubMed: 32216041
DOI: 10.1111/vop.12760 -
Frontiers in Endocrinology 2021The lower incidence of metabolic diseases of women than men and the increasing morbidity of metabolic disorders of menopausal women indicated that hormones produced by...
The lower incidence of metabolic diseases of women than men and the increasing morbidity of metabolic disorders of menopausal women indicated that hormones produced by ovaries may affect homeostasis of glucose and lipid metabolism, but the underlying mechanisms remain unclear. To explore the functions of ovaries on regulating glucose and lipid metabolism in females, 8 weeks old C57BL/6 mice were preformed ovariectomy and administrated with normal food diet (NFD) or high fat diet (HFD). Six weeks after ovariectomy, blood biochemical indexes were tested and the morphology and histology of livers were checked. The expression levels of genes related to glucose and lipid metabolism in liver were detected through transcriptome analysis, qPCR and western blot assays. 16S rDNA sequence was conducted to analyze the gut microbiota of mice with ovariectomy and different diets. The serum total cholesterol (TC) was significantly increased in ovariectomized (OVX) mice fed with NFD (OVXN), and serum low density lipoprotein-cholesterol (LDL-C) was significantly increased in both OVXN mice and OVX mice fed with HFD (OVXH). The excessive glycogen storage was found in livers of 37.5% mice from OVXN group, and lipid accumulation was detected in livers of the other 62.5% OVXN mice. The OVXN group was further divided into OVXN-Gly and OVXN-TG subgroups depending on histological results of the liver. Lipid drops in livers of OVXH mice were more and larger than other groups. The expression level of genes related with lipogenesis was significantly increased and the expression level of genes related with β-oxidation was significantly downregulated in the liver of OVXN mice. Ovariectomy also caused the dysbiosis of intestinal flora of OVXN and OVXH mice. These results demonstrated that hormones generated by ovaries played important roles in regulating hepatic glucose and lipid metabolism and communicating with the gut microbiota in females.
Topics: Animals; Diet, High-Fat; Dysbiosis; Female; Gastrointestinal Microbiome; Glucose; Homeostasis; Lipids; Mice; Mice, Inbred C57BL; Ovariectomy
PubMed: 34276568
DOI: 10.3389/fendo.2021.708838