The Sigma-1 Receptor Exacerbates Cardiac Dysfunction Induced by Obstructive Nephropathy: A Role for Sexual Dimorphism.

The Sigma-1 Receptor (Sigmar1) is a stress-activated chaperone and a promising target for pharmacological modulation due to its ability to induce multiple cellular responses. Yet, it is unknown how Sigmar1 is involved in cardiorenal syndrome type 4 (CRS4) in which renal damage results in cardiac dysfunction. This study explored the role of Sigmar1 and its ligands in a CRS4 model induced by unilateral ureteral obstruction (UUO) in male and female C57BL/6 mice. We evaluated renal and cardiac dysfunction markers, Sigmar1 expression, and cardiac remodeling through time (7, 12, and 21 days) and after chronically administering the Sigmar1 agonists PRE-084 (1 mg/kg/day) and SA4503 (1 mg/kg/day), and the antagonist haloperidol (2 mg/kg/day), for 21 days after UUO using colorimetric analysis, RT-qPCR, histology, immunohistochemistry, enzyme-linked immunosorbent assay, RNA-seq, and bioinformatics. We found that obstructive nephropathy induces Sigmar1 expression in the kidneys and heart, and that Sigmar1 stimulation with its agonists PRE-084 and SA4503 aggravates cardiac dysfunction and remodeling in both sexes. Still, their effects are significantly more potent in males. Our findings reveal essential differences associated with sex in the development of CRS4 and should be considered when contemplating Sigmar1 as a pharmacological target.

Isolated Hydronephrosis and Urinary Tract Infection by Two Years of Age: A Population-Based Study.

OBJECTIVE: To evaluate the risk for urinary tract infection (UTI) in infants with isolated hydronephrosis (IH). STUDY DESIGN: A retrospective, population-based study including all infants insured by Clalit Health Services and followed from birth to age 2 years in 3 regions of central Israel. Infants were divided into 3 groups based on electronic medical record diagnoses by age 6 months: (1) control: no urological diagnosis; (2) IH; and (3) complicated urological diagnosis (CUD): any additional nephrological/urological diagnosis with/without HN. The primary outcome was a diagnosis of UTI in the first 2 years of life. RESULTS: The cohort included 340 619 infants (52% male): 333 920 controls, 4369 with IH, and 2331 with CUD. Infants with IH were associated with a greater risk for UTI than control patients (17% vs 4%, P < .001). UTI risk for a male infant with IH was greater than for a female infant in the control group (12.6% vs 6.5%, P < .001). In a multivariable logistic regression analysis, both IH (OR 7.04; 95% CI 6.46-7.66) and CUD (OR 14.9; 95% CI 13.6-16.4) were independently associated with UTI. CONCLUSION: Infants with IH are at a greater risk for UTI in the first 2 years of life, supporting the recommendation for a high index of suspicion for UTI in this population.

Antidiabetic and hepato-renal protective effects of medicinal plants in STZ induced diabetic rats / Efeitos antidiabéticos e hepatorrenais de plantas medicinais em ratos diabéticos induzidos por STZ

The antidiabetic and hepato-renal protective effects of Citrullus colocynthis and Momordica charantia ethanol extracts were investigated in streptozotocin (STZ) induced diabetic male albino rats. Diabetic rats were treated with C. colocynthis, M. charantia or C. colocynthis + M. charantia mixed extract at a dose of 250 mg /kg body weight per oral per day for 21 days. The mean body weight of all the diabetic rat groups on day 1 of treatment (day 10 of diabetes) was significantly lower than the normal control rat group (P<0.05). The blood glucose level of all the diabetic rat groups on day 1 of treatment (day 10 of diabetes) was significantly (P<0.05) higher (> 200 mg/dl) than the normal control rat group (95.5 ± 2.7). At the end of treatment (day 21), the diabetic rats treated with plant extracts showed significant increase (P<0.05) in body weight and significant (P<0.05) reduction in blood glucose level when compared to diabetic control animals. Significant increase (< 0.05) was observed in the serum bilirubin, alanine transaminase (ALT), aspartate transaminase (AST), alkaline phosphatase (ALP), urea and creatinine levels of diabetic control rat group. The serum levels of these liver and kidney-related parameters of diabetic rats treated with plant extract were significantly lower when compared to diabetic control rat group (p < 0.05). Photomicrographs of liver and kidney microsections from diabetic rats treated with these plant extracts showed amelioration in the hepato-renal histoarchitectures. It was concluded that the C. colocynthis and M. charantia methanol extracts are antidiabetic and hepato-renal protective in STZ induced diabetic male rats. Treatment of the diabetic rats with C. colocynthis + M. charantia mixed extract is more effective in the amelioration of diabetes and hepato-renal injuries in STZ induced diabetic male rats.

Os efeitos protetores antidiabéticos e hepatorrenais dos extratos etanólicos de Citrullus colocynthis e Momordica charantia foram investigados em ratos albinos machos diabéticos induzidos por estreptozotocina (STZ). Ratos diabéticos foram tratados com extrato misto de C. colocynthis, M. charantia ou C. colocynthis + M. charantia na dose de 250 mg/kg de peso corporal por via oral por dia durante 21 dias. O peso corporal médio de todos os grupos de ratos diabéticos no dia 1 de tratamento (dia 10 de diabetes) foi significativamente menor do que o grupo de ratos controle normal (P < 0,05). O nível de glicose no sangue de todos os grupos de ratos diabéticos no dia 1 de tratamento (dia 10 de diabetes) foi significativamente (P < 0,05) maior (> 200 mg/dl) do que o grupo de ratos controle normal (95,5 ± 2,7). Ao final do tratamento (dia 21), os ratos diabéticos tratados com extratos vegetais apresentaram aumento significativo (P < 0,05) no peso corporal e redução significativa (P < 0,05) na glicemia quando comparados aos animais controle diabéticos. Aumento significativo (< 0,05) foi observado nos níveis séricos de bilirrubina, alanina transaminase (ALT), aspartato transaminase (AST), fosfatase alcalina (ALP), ureia e creatinina do grupo controle diabético. Os níveis séricos desses parâmetros hepáticos e renais de ratos diabéticos tratados com extrato vegetal foram significativamente menores quando comparados ao grupo controle de ratos diabéticos (p < 0,05). Fotomicrografias de microseções de fígado e rim de ratos diabéticos tratados com esses extratos vegetais mostraram melhora nas histoarquiteturas hepatorrenais. Concluiu-se que os extratos metanólicos de C. colocynthis e M. charantia são antidiabéticos e hepatorrenais protetores em ratos machos diabéticos induzidos por STZ. O tratamento de ratos diabéticos com extrato misto de C. colocynthis + M. charantia é mais eficaz na melhora do diabetes e lesões hepatorrenais em ratos machos diabéticos induzidos por STZ.

Gasless laparoscopic renal biopsy in canine cadavers: a preclinical study.

In this study we aimed to analyze the feasibility of the gasless renal biopsy technique in canine cadavers. The cadavers were randomly divided into two groups: laparoscopic GCG, in which gasless laparoscopy was performed and GCP, laparoscopy with pneumoperitoneum was performed. The procedures were randomly performed on the right and left kidneys. The total surgical time, procedural steps, and intraoperative complications were recorded. The degree of difficulty of the surgical approaches was evaluated by the surgeon, assistant, and external evaluators. Renal samples were evaluated for quality, number of glomeruli, and proportion of renal cortex. The total operative time was higher in the GCG group than in the GCP group (p < 0.01). Additionally, positioning of the second portal and platform positioning took longer than the other steps. The surgical groups differed from each other in the Likert scale values for almost all the parameters regarding the difficulty of the surgical approaches (p < 0.05), with higher scores in the GCG group than in the GCP group. Based on the video recordings, the GCP group had higher scores than the GCG group for degrees of difficulty of the approach (p < 0.05). Renal histological parameters were similar between the surgical groups and surgical sides. Our study findings indicate that the proposed gasless renal biopsy technique is feasible. The longer operative time and technical difficulties in the gasless approach did not affect the quality of the renal specimens.

Neste estudo objetivamos analisar a viabilidade da técnica de biópsia renal gasless em cadáveres caninos. Os cadáveres foram divididos aleatoriamente em dois grupos: GCG laparoscópico, no qual foi realizada laparoscopia gasless e GCP, onde foi realizada laparoscopia com pneumoperitônio. Os procedimentos foram realizados aleatoriamente nos rins direito e esquerdo. O tempo cirúrgico total, etapas do procedimento e complicações intraoperatórias foram registrados. O grau de dificuldade das abordagens cirúrgicas foi avaliado pelo cirurgião, assistente e avaliadores externos. As amostras renais foram avaliadas quanto à qualidade, número de glomérulos e proporção do córtex renal. O tempo operatório total foi maior no grupo GCG do que no grupo GCP (p < 0,01). Além disso, o posicionamento do segundo portal e o posicionamento da plataforma demoraram mais do que as outras etapas. Os grupos cirúrgicos diferiram entre si nos valores da escala Likert para quase todos os parâmetros relativos à dificuldade das abordagens cirúrgicas (p < 0,05), com escores mais elevados no grupo GCG do que no grupo GCP. Com base nas gravações de vídeo, o grupo GCP obteve pontuações mais altas que o grupo GCG para graus de dificuldade da abordagem (p < 0,05). Os parâmetros histológicos renais foram semelhantes entre os grupos cirúrgicos e os lados cirúrgicos. Os resultados do nosso estudo indicam que a técnica proposta de biópsia renal gasless é viável. O maior tempo operatório e as dificuldades técnicas na abordagem sem gás não afetaram a qualidade das amostras renais.

Experimental acute Clostridium perfringens type D enterotoxemia in sheep is not characterized by specific renal lesions.

Type D enterotoxemia, caused by Clostridium perfringens epsilon toxin (ETX), is one of the most economically important clostridial diseases of sheep. Acute type D enterotoxemia is characterized by well-documented lesions in the nervous, cardiocirculatory, and pulmonary systems. However, discrepancies and confusion exist as to whether renal lesions are part of the spectrum of lesions of this condition, which is controversial considering that for many decades it has been colloquially referred to as "pulpy kidney disease." Here, the authors assess renal changes in an experimental model of acute type D enterotoxemia in sheep and evaluate the possible role of ETX in their genesis. Four groups of 6 sheep each were intraduodenally inoculated with either a wild-type virulent C. perfringens type D strain, an etx knockout mutant unable to produce ETX, the etx mutant strain complemented with the wild-type etx gene that regains the ETX toxin production, or sterile culture medium (control group). All sheep were autopsied less than 24 hours after inoculation; none of them developed gross lesions in the kidneys. Ten predefined histologic renal changes were scored in each sheep. The proportion of sheep with microscopic changes and their severity scores did not differ significantly between groups. Mild intratubular medullary hemorrhage was observed in only 2 of the 12 sheep inoculated with the wild-type or etx-complemented bacterial strains, but not in the 12 sheep of the other 2 groups. The authors conclude that no specific gross or histologic renal lesions are observed in sheep with experimental acute type D enterotoxemia.

Nutritional and mineral composition of Opuntia stricta Haw: Balance of macrominerals, renal function and blood metabolites in sheep / Composição nutricional e mineral da Opuntia Sttricta Haw: balanço de macrominerais, função renal e metabólitos sanguíneos em ovinos

This study aimed to evaluate the effect of the inclusion of spineless cactus (Opuntia stricta Haw) in the diet of sheep on the balance of macrominerals, renal function, and blood metabolites. Five sheep cannulated in the rumen (61.5±9.5kg body weight) were used in a 5 × 5 Latin square composed of five diets and five experimental periods. The experimental period lasted 105 days, with five periods of 21 days each. Four diets containing levels of spineless cactus (121, 245, 371, and 500g/kg of dry matter (DM)), and a control diet were evaluated. Samples of the ingredients, orts, feces, urine, and blood were collected. Spineless cactus inclusion in sheep diets increased the DM intake, ash, oxalate, and all macrominerals intake (P < 0.05), but did not affect the urinary and fecal excretion of P, as well as the concentration of P in the blood (P > 0.05). It is possible to verify that the inclusion of spineless cactus, up to the level of 500g/kg of DM in the sheep diets, does not appear to cause damage to the animal's health. Its inclusion does not compromise kidney function or blood metabolites evaluated herein.

O objetivo deste estudo foi avaliar o efeito da inclusão de palma forrageira (Opuntia stricta Haw) na dieta de ovinos sobre o balanço dos macrominerais, a função renal e os metabólitos sanguíneos. Cinco ovinos canulados no rúmen (61,5±9,5kg de peso corporal) foram distribuídos em um quadrado de 5 × 5 latinos, composto de cinco dietas e cinco períodos experimentais. O período experimental teve duração de 105 dias, sendo cinco períodos de 21 dias cada. Foram avaliadas quatro dietas contendo níveis de palma forrageira (121, 245, 371 e 500g/kg de matéria seca (MS)), e uma dieta controle. Foram coletadas amostras dos ingredientes, sobras, fezes, urina e sangue. A inclusão de palma forrageira na dieta dos ovinos aumentou o consumo de MS, cinzas, oxalato e todos os macrominerais (P<0,05), mas não afetou a excreção urinária e a fecal de P, bem como a concentração de P no sangue (P>0,05). É possível verificar que a inclusão de palma forrageira, até o nível de 500g/kg de MS na dieta de ovinos, não parece causar danos à saúde do animal. Sua inclusão não compromete a função renal ou os metabólitos sanguíneos avaliados.

Polymeric Nanomicelles Loaded with Anandamide and Their Renal Effects as a Therapeutic Alternative for Hypertension Treatment by Passive Targeting.

We have previously demonstrated significant in vitro natriuretic effects of anandamide (AEA) nanoformulation in polymeric nanoparticles, whose size prevents their accumulation in organs, such as the kidneys. Therefore, it is of particular interest to design and test nanostructures that can pharmacologically accumulate in these organs. In this regard, we prepared and characterized polymeric nanomicelles (~14 and 40 nm). Likewise, their biodistribution was determined. Spontaneously hypertensive rats (SHR) and normotensive rats (WKY), n = 3 per group, were divided into five treatment conditions: control, sham, free AEA freshly dispersed in aqueous solution or 24 h after its dispersion, and AEA encapsulated in nanomicelles. The kidneys were the main site of accumulation of the nanoformulation after 24 h. Freshly dispersed free AEA showed its classical triphasic response in SHR, which was absent from all other treatments. Nanoformulated AEA produced a sustained antihypertensive effect over 2 h, accompanied by a significant increase in fractional sodium excretion (FSE %). These effects were not observed in WKY, sham, or free AEA-treated rats after 24 h of its aqueous dispersion. Without precedent, we demonstrate in vivo natriuretic, diuretic, and hypotensive effects of AEA nanoformulation in polymeric nanomicelles, suggesting its possible use as a new antihypertensive agent with intravenous administration and passive renal accumulation.

Morphology of urinary system in six-banded armadillo (Euphractus sexcinctus, Linnaeus, 1758).

Euphractus sexcinctus is a wild mammal native to the Americas; they have great diversity and are not in danger of extinction like other armadillo species. Despite the diversity, the morphology of several biological systems of this species has not been fully described. This study details the gross and microscopic anatomy of the urinary system in Euphractus sexcinctus, a six-banded armadillo, compared with other mammalian study models. Six animals were dissected in the study. In the anatomical analysis, the kidneys, ureters, urinary bladder and urethra were dissected and photographed; then, fragments were submitted to histological routine for staining with haematoxylin-eosin, toluidine blue and Masson's trichrome for visualization under light microscopy. The six-banded armadillo ureter is histologically composed of four concentric layers. The urinary bladder is presented with three tissue layers. The pattern of constitution and distribution of urinary system structures was compatible with that of most domestic like Canis familiaris and wild animals like Bradypus torquatus, with adaptations for the arid and semi-arid habitat. The description of the morphology of Euphractus sexcinctus presents great relevance both for its conservation and for its use as a model for clinical research.

Distinct global DNA methylation and NF-κB expression profile of preimplantation biopsies from ideal and non-ideal kidneys.

BACKGROUND: Epigenetic mechanisms may affect the ideal and non-ideal kidneys selected for transplantation and their inflammatory gene expression profile differently and may contribute to poor clinical outcomes. OBJECTIVE: Study the Global DNA methylation and the expression profiles of the DNA methyltransferases (DNMTs) and nuclear factor kappa B (NF-κB) in preimplantation kidney biopsies from ideal and non-ideal kidneys (expanded criteria donor (ECD) and with KDPI > 85%). METHODS: In a sample consisting of 45 consecutive pre-implantation biopsies, global DNA methylation levels were detected by LINE-1 repeated elements using bisulfite pyrosequencing. DNMT gene expression was assessed by real-time quantitative polymerase chain reaction, and NF-κB protein expression by immunofluorescence. RESULTS: ECD kidneys displayed increased methylation levels in LINE-1, and DNMT1 and DNMT3B expression was upregulated when comparing ECD to standard criteria donor kidneys. Similarly, kidneys with KDPI > 85% exhibited increased LINE-1 methylation and DNMT1 upregulation when compared to a KDPI ≤ 85%. NF-κB protein expression levels were greatly increased in both types of non-ideal kidneys compared to ideal kidneys. Moreover, hypermethylation of LINE-1 was associated with cold ischemia time > 20 h and ECD kidney classification. CONCLUSIONS: This study shows that global DNA hypermethylation and high expression of NF-κB occurred in both types of non-ideal kidneys and were associated with prolonged cold ischemia time. Global DNA methylation can be a useful tool to assess non-ideal kidneys and hence, could be used to expand the pool of kidneys donors.

Borneol reduces sympathetic vasomotor hyperactivity and restores depressed baroreflex sensitivity in rats with renovascular hypertension.

Borneol is a bicyclic monoterpene that has long been used in traditional Chinese medicine to increase blood-brain barrier permeability and has shown promising cardiovascular effects. The present study aimed to evaluate the effect of borneol on vascular tone, blood pressure, autonomic function, and baroreflex sensitivity in normotensive and hypertensive rats. A combination of in vitro and in vivo assays was performed in 2-kidneys-1-clip hypertensive rats (2K1C) and their controls (sham). We assessed the in vivo effect of oral treatment with borneol on blood pressure, heart rate, autonomic function, and baroreflex sensitivity in sham and 2K1C rats. Additionally, the vasorelaxant effect of borneol in the superior mesenteric artery isolated from rats and its mechanism of action were evaluated. Oral administration of borneol (125 mg/kg/day) reduced blood pressure, sympathetic vasomotor hyperactivity, and serum oxidative stress and improved baroreflex sensitivity in 2K1C rats. In vessel preparations, borneol induced endothelium-independent vasodilatation after precontraction with phenylephrine or KCl (60 mM). There was no difference in the vascular effect induced by borneol in either the 2K1C or the sham group. In addition, borneol antagonized the contractions induced by CaCl2 and reversed (S)-(-)-Bay K 8644-induced contraction. These data suggest that borneol presents antihypertensive effects in 2K1C rats, which is associated with its ability to improve autonomic impairment and baroreflex dysfunction. The borneol-induced relaxation in the superior mesenteric artery involves L-type Ca2+ channel blockade. This vascular action associated with the antioxidant effect induced by borneol may be responsible, at least in part, for the in vivo effects induced by this monoterpene.

Agenesia renal unilateral em gatinha / Unilateral renal agenesis in kitten

Background: The kidneys are a pair of organs that maintain homeostasis, and perform hormonal and excretory functions; the functional unit of the kidney is the nephron. Approximately 2% of cats are born with some structural or functional anomaly, which occurs during fetal development. Unilateral renal agenesis is a rare congenital anomaly in felines, where the cat has only one kidney. This can lead to a series of dysfunctions, with clinical signs, especially when the contralateral organ does not adequately compensate, since there is more than one concomitant congenital disease like kidney dysplasia, which is the abnormal formation of the kidney structures. This study aimed to report the case of a kitten diagnosed with unilateral renal agenesis; the clinical signs, diagnosis, and treatment. Case: A 2-month-old mixed breed female kitten, weighing 0.5 kg, was attended in a veterinary clinic with emesis, hyporexia, hypodipsia, normuria, and diarrhea. Upon physical examination, dehydration, hyperthermia, and renomegaly by abdominal palpation were observed. Complementary examinations such as serum urea and creatinine estimation, abdominal ultrasound, and excretory urography, were requested, and the results include hemoglobin (9 g/dL), mean corpuscular volume (26%), normocytic normochromic anemia, urea (312 mg/dL), and creatinine (3.5 mg/dL). The abdominal ultrasound showed renomegaly on the left kidney and the absence of the right kidney. The above results and excretory urography help to confirm the diagnosis of unilateral renal agenesis and suggested renal dysplasia. The patient was hospitalized to stabilize her condition. The treatment is symptomatic and supportive and aims to increase the patient’s quality of life. Treatment with metoclopramide, erythropoietin, fluid therapy with ringer’s lactate solution, and renal therapeutic feed was prescribed. After 4 days of hospitalization and treatment, the serum creatinine was within normal...

Heme Oxygenase 1 in Vertebrates: Friend and Foe.

HO-1 is the inducible form of the enzyme heme-oxygenase. HO-1 catalyzes heme breakdown, reducing the levels of this important oxidant molecule and generating antioxidant, anti-inflammatory, and anti-apoptotic byproducts. Thus, HO-1 has been described as an important stress response mechanism during both physiologic and pathological processes. Interestingly, some findings are demonstrating that uncontrolled levels of HO-1 byproducts can be associated with cell death and tissue destruction as well. Furthermore, HO-1 can be located in the nucleus, influencing gene transcription, cellular proliferation, and DNA repair. Here, we will discuss several studies that approach HO-1 effects as a protective or detrimental mechanism in different pathological conditions. In this sense, as the major organs of vertebrates will deal specifically with distinct types of stresses, we discuss the HO-1 role in each of them, exposing the contradictions associated with HO-1 expression after different insults and circumstances.

Male reproductive cycle of Bothrops pubescens (Serpentes, Viperidae) from southern Brazil

We describe the seasonal variation in the male reproductive cycle of Bothrops pubescens, a pitviper from southern Brazil. All specimens were collected in the state of Rio Grande do Sul, a region with climates varying from subtropical to subtemperate and temperate. We characterized male reproduction considering histological analyses of the testes, sexual segment of the kidneys (SSK), and ductus deferens, as well as macroscopic indicators of reproductive activity (testes volume and ductus deferens width in the distal portion) to allow comparisons. We also evaluated the seasonal variation of epithelial height and tubule diameter of the testes and SSK. These reproductive parameters showed significant seasonal variation, with a high increase in summer and a peak in autumn for spermatogenic and SSK activity. Courtship behavior occurs on March (end of summer/beginning of autumn), in synchrony with sperm production and SSK hypertrophy. Sperm storage occurred in the ductus deferens throughout the year. We detected an ampulla ductus deferentis in the distal portion of the ductus deferens in some individuals. Male B. pubescens exhibit a seasonal reproductive cycle, and the use of microscopic methods was highly informative for supporting this conclusion.

Nós descrevemos a variação sazonal no ciclo reprodutivo de Bothrops pubescens, uma espécie de serpente da subfamília Crotalinae, da região Sul do Brasil. Os machos foram amostrados no estado do Rio Grande do Sul, que é uma região com climas variando de subtropical a subtemperado e temperado. Os ciclos dos testículos, segmento sexual renal (SSR) e ducto deferente foram caracterizados utilizando análises histológicas para descrever o ciclo reprodutivo dos machos. Nós também avaliamos indicadores macroscópicos da atividade reprodutiva (volume do testículo e largura do ducto deferente na região distal) para fins de comparação. Considerando os dados histológicos, foram avaliadas as variações sazonais da altura do epitélio e diâmetro dos túbulos tanto dos testículos quanto do SSR. Estes parâmetros reprodutivos apresentaram variação sazonal significativa, com grande aumento no verão e pico no outono, tanto para a atividade espermatogênica quanto para o SSR. Corte em vida livre ocorre em março (fim do verão/início do outono), em sincronia com a produção de esperma e a hipertrofia do SSR. Estocagem de esperma ocorreu no ducto deferente ao longo do ano. A ampulla ductus deferentis foi observada na porção distal do ducto deferente de alguns indivíduos. O ciclo reprodutivo dos machos de B. pubescens é sazonal e o uso de métodos microscópicos foi essencial para chegar a esta conclusão.

Renal resistivity index as an aid in the diagnosis of acute kidney injury in bitches with pyometra / Índice de resistividade renal como auxiliar no diagnóstico de lesão renal aguda em cadelas com piometra

This study aimed to evaluate the renal function of six bitches of various breeds and ages, with open pyometra, attended in the Small Animal Medical Clinic sector of the Veterinary Hospital from Federal University of Campina Grande, through the measurement of laboratory tests: urea and creatinine serum, dosage of the urinary Protein-Creatinine Ratio (PCR), urinary gamma-glutamyltransferase (GGT) and determination of the renal resistivity index (RI). The levels of urea and creatinine were elevated in 16.6% (1/6) of the female dogs; the urinary protein-creatinine ratio was increased in 66.6% (4/6), while the urinary gamma-glutamyltransferase value was elevated in 50% (3/6). The renal resistivity index was increased in the right and left kidneys by 66.6% (4/6) of bitches, with no statistical difference between them. It was concluded that the renal resistivity index was a practical and effective method to assist in the diagnosis of acute kidney injury, along with other early markers, such as PCR and urinary GGT.(AU)

Objetivou-se com esse estudo avaliar a função renal de seis cadelas com piometra aberta, de variadas raças e ida-des, atendidas no setor de Clínica Médica de Pequenos Animais do Hospital Veterinário da Universidade Federal de Campina Grande, através da mensuração dos exames laboratoriais: ureia e creatinina séricas, dosagem da relação proteína/creatinina (RPC) urinária, gama-glutamiltransferase (GGT) urinária e determinação do índice de resistividade (IR) renal. Os níveis de ureia e creatinina apresentaram-se elevados em 16,6% (1/6) das cadelas, a relação proteína:creatinina urinária estava aumen-tada em 66,6% (4/6), enquanto o valor de gama-glutamiltransferase urinária encontrou-se elevado em 50% (3/6). O índice de resistividade renal mostrou-se aumentado nos rins direito e esquerdo de 66,6% (4/6) das cadelas, não havendo diferença estatística entre ambos. Concluiu-se que o índice de resistividade renal foi um método prático e eficaz para auxiliar no diag-nóstico da lesão renal aguda, juntamente com outros marcadores precoces, como RPC e GGT urinária.(AU)

Renal resistivity index as an aid in the diagnosis of acute kidney injury in bitches with pyometra / Índice de resistividade renal como auxiliar no diagnóstico de lesão renal aguda em cadelas com piometra

This study aimed to evaluate the renal function of six bitches of various breeds and ages, with open pyometra, attended in the Small Animal Medical Clinic sector of the Veterinary Hospital from Federal University of Campina Grande, through the measurement of laboratory tests: urea and creatinine serum, dosage of the urinary Protein-Creatinine Ratio (PCR), urinary gamma-glutamyltransferase (GGT) and determination of the renal resistivity index (RI). The levels of urea and creatinine were elevated in 16.6% (1/6) of the female dogs; the urinary protein-creatinine ratio was increased in 66.6% (4/6), while the urinary gamma-glutamyltransferase value was elevated in 50% (3/6). The renal resistivity index was increased in the right and left kidneys by 66.6% (4/6) of bitches, with no statistical difference between them. It was concluded that the renal resistivity index was a practical and effective method to assist in the diagnosis of acute kidney injury, along with other early markers, such as PCR and urinary GGT.

Objetivou-se com esse estudo avaliar a função renal de seis cadelas com piometra aberta, de variadas raças e ida-des, atendidas no setor de Clínica Médica de Pequenos Animais do Hospital Veterinário da Universidade Federal de Campina Grande, através da mensuração dos exames laboratoriais: ureia e creatinina séricas, dosagem da relação proteína/creatinina (RPC) urinária, gama-glutamiltransferase (GGT) urinária e determinação do índice de resistividade (IR) renal. Os níveis de ureia e creatinina apresentaram-se elevados em 16,6% (1/6) das cadelas, a relação proteína:creatinina urinária estava aumen-tada em 66,6% (4/6), enquanto o valor de gama-glutamiltransferase urinária encontrou-se elevado em 50% (3/6). O índice de resistividade renal mostrou-se aumentado nos rins direito e esquerdo de 66,6% (4/6) das cadelas, não havendo diferença estatística entre ambos. Concluiu-se que o índice de resistividade renal foi um método prático e eficaz para auxiliar no diag-nóstico da lesão renal aguda, juntamente com outros marcadores precoces, como RPC e GGT urinária.

Pathology of severe urolithiasis in a flock of egg-laying hens

Fourteen, 31-week-old Lohmann white layers from a flock of 30,000 chickens had a history of apathy, and a drop in egg production. Clinical signs were observed in approximately 40% of the flock, and lasted for three months. Fourteen hens were euthanized for post-mortem examinations. Macroscopic findings included marked atrophy and loss of renal lobes along with compensatory renal hypertrophy of the contralateral lobe. Ureters were markedly dilated and filled with mucus and/or with molded white to yellow-grey uroliths that obliterated the lumen. At histopathology, the uroliths inside ureters and tubules were composed of concentrically arranged mineralized concretions, as well as urates associated with heterophilic infiltrations and epithelial hyperplasia. Renal parenchyma adjacent to obstructed ureters was compressed with tubules replaced by fibrous tissue. Multifocal interstitial lymphocytic nephritis, proteinuria and membranoproliferative glomerulonephritis were also found. Heterophilic and caseous ureteritis associated with numerous Gram-positive coccoid bacteria occurred in three chickens. Immunohistochemistry for avian coronavirus was negative. This negative result along with the case history indicated that water restriction was the most likely cause of mortality. This condition resulted in significant economic loss for this farmer.(AU)

Pathology of severe urolithiasis in a flock of egg-laying hens

Fourteen, 31-week-old Lohmann white layers from a flock of 30,000 chickens had a history of apathy, and a drop in egg production. Clinical signs were observed in approximately 40% of the flock, and lasted for three months. Fourteen hens were euthanized for post-mortem examinations. Macroscopic findings included marked atrophy and loss of renal lobes along with compensatory renal hypertrophy of the contralateral lobe. Ureters were markedly dilated and filled with mucus and/or with molded white to yellow-grey uroliths that obliterated the lumen. At histopathology, the uroliths inside ureters and tubules were composed of concentrically arranged mineralized concretions, as well as urates associated with heterophilic infiltrations and epithelial hyperplasia. Renal parenchyma adjacent to obstructed ureters was compressed with tubules replaced by fibrous tissue. Multifocal interstitial lymphocytic nephritis, proteinuria and membranoproliferative glomerulonephritis were also found. Heterophilic and caseous ureteritis associated with numerous Gram-positive coccoid bacteria occurred in three chickens. Immunohistochemistry for avian coronavirus was negative. This negative result along with the case history indicated that water restriction was the most likely cause of mortality. This condition resulted in significant economic loss for this farmer.

Técnica para identificação de ovos de Dioctophyme renale em urina de gatos, empregada em sílica / Technique for identifying eggs of Dioctophyme renale in cat urine, employed in silica / Técnica de identificación de huevos de Dioctophyme renale en orina de gato, utilizada en sílice

A dioctofimatose é uma doença parasitária causada pelo helminto Dioctophyme renale, tendo como hospedeiros definitivos, cães, gatos, animais silvestres e também o homem, pois este parasito possui potencial zoonótico. Acomete os rins dos seus hospedeiros definitivos, geralmente o direito, mas podem ser encontrados também em outros locais. Embora seja descrito maior ocorrência de casos em cães, também há relatos desta parasitose em gatos. Uma das formas de diagnóstico é através da visualização de ovos do D. renale através do exame de urina. Porém, pelas características comportamentais dos gatos, a coleta de urina nesta espécie é de difícil execução. Portanto, através do estudo de técnicas para pesquisa de ovos deste parasito na urina dos gatos em sílica, presente nas caixas de areia, procura-se facilitar o diagnóstico nestes animais. Para realização deste trabalho, amostras de sílica foram contaminadas com urina contendo ovos de D. renale. As técnicas utilizadas para pesquisa de ovos foram: centrífugo-flutuação em solução hipersaturada glicosada, em duas densidades: 1.230g/ml e 1.275g/ml; flutuação espontânea em solução hipersaturada glicosada, em duas densidades: 1,230g/ml e 1,275g/ml e centrífugo-sedimentação. A avaliação das amostras foi realizada em diferentes tempos, distribuídos da seguinte forma: momento zero, 6 horas, 12 horas, 18 horas, 24 horas, 36 horas, 48 horas, 72 horas, 120 horas, 168 horas, 240 horas e 336 horas após contaminação do material. A técnica de centrífugo-sedimentação foi a que apresentou o melhor resultado, sendo possível identificar ovos morfologicamente viáveis de D. Renale durante os 14 dias de análise.(AU)

Dioctofimatosis is a parasitic disease caused by the helminth Dioctophyme renale, having as definitive hosts, dogs, cats, wild animals and also man, as this parasite has zoonotic potential. It affects the kidneys of its definitive hosts, usually the right, but can also be found in other places. Although a higher occurrence of cases in dogs has been described, there are also reports of this parasitosis in cats. One of the ways of diagnosing the disease is through the visualization of D. renale eggs through the urine exam. However, due to the behavioral characteristics of cats, urine collection in this species is difficult to perform. Therefore, through the study of techniques to search for eggs of this parasite in the urine of cats in silica, present in litter boxes, we seek to facilitate the diagnosis in these animals. To carry out this work, silica samples were contaminated with urine containing D. renale eggs. The techniques used for egg research were: centrifugal-flotation in glycosated hypersaturated solution, in two densities: 1,230g/ml and 1,275g/ml; spontaneous fluctuation in glycosated hypersaturated solution, in two densities: 1.230g/ml and 1.275g/ml and centrifugal-sedimentation. The evaluation of the samples was carried out at different times, distributed as follows: time zero, 6 hours, 12 hours, 18 hours, 24 hours, 36 hours, 48 hours, 72 hours, 120 hours, 168 hours, 240 hours and 336 hours after contamination of the material. The centrifugal-sedimentation technique showed the best result, making it possible to identify morphologically viable eggs from D. renale during the 14 days of analysis.(AU)

La dioctofimatosis es una enfermedad parasitaria causada por el helminto Dioctophyme renale, que tiene como hospedadores definitivos, perros, gatos, animales salvajes y también el hombre, ya que este parásito tiene potencial zoonótico. Afecta los riñones de sus huéspedes definitivos, generalmente el derecho, pero también se puede encontrar en otros lugares. Aunque se ha descrito una mayor incidencia de casos en perros, también hay informes de esta parasitosis en gatos. Una de las formas de diagnóstico es a través de la visualización de los huevos de D. renale a través del examen de orina. Sin embargo, debido a las características de comportamiento de los gatos, la recolección de orina en esta especie es difícil de realizar. Por lo tanto, a través del estudio de técnicas para buscar huevos de este parásito en laorina de gatos en sílice, presentes en cajas de arena, buscamos facilitar el diagnóstico en estos animales. Para llevar a cabo este trabajo, las muestras de sílice se contaminaron con orina que contenía huevos de D. renale. Las técnicas utilizadas para investigar los huevos fueron: flotación centrífuga en solución hipersaturada glicosilada, en dos densidades: 1.230 g/ml y 1.275 g/ml; fluctuación espontánea en solución glicosilada hipersaturada, en dos densidades: 1.230 g/ml y 1.275 g/ml y sedimentación centrífuga. La evaluación de las muestras se realizó en diferentes momentos, distribuidos de la siguiente manera: tiempo cero, 6 horas, 12 horas, 18 horas, 24 horas, 36 horas, 48 horas, 72 horas, 120 horas, 168 horas, 240 horas y 336 horas después de la contaminación del material. La técnica de sedimentación centrífuga mostró el mejor resultado, permitiendo identificar huevos morfológicamente viables de D. renale durante los 14 días de análisis.(AU)

Prostaglandin E1 prevents histopathological changes improving renal function in experimental nephropathy induced by renal microembolism.

This study investigated the effect of prostaglandin E1 (PGE-1) treatment on the biochemical and histopathological changes in a model of nephropathy that was induced using renal microembolism in rats. Wistar rats were assigned to three groups: a control group (C, normal), a renal microembolism (RM) group, and a renal microembolism treated with PGE-1 (RM + PGE-1) group. The renal microembolism was induced by an arterial injection of polymethylmethacrylate microbeads into the remaining kidney of nephrectomized rats. Intramuscular treatment with PGE-1 was initiated on the day of the induction of the renal microembolism and continued once weekly for up to 60 days. At the end of the treatment period, blood samples were taken to assess the serum creatinine and urea concentrations, and 24-h urine samples were collected to determine the total protein levels. The rats' kidneys were removed and processed for histopathological analysis using the hematoxylin and eosin, periodic acid-Schiff, Mallory-Azan, and Picro-Sirius techniques. An immunohistochemical assay with vascular endothelial growth factor receptor-2 (anti-VEGFR-2) was also performed. The results showed that the PGE-1 treatment prevented vascular, glomerular, tubular, and interstitial alterations and reduced the biochemical changes, thus improving the renal function in rats that were subjected to renal microembolism. These effects could be partially attributable to an increase in the PGE-1-induced angiogenesis, because we observed an increase in the tissue expression of VEGFR-2, a specific marker of angiogenesis.

Técnica para identificação de ovos de Dioctophyme renale em urina de gatos, empregada em sílica / Technique for identifying eggs of Dioctophyme renale in cat urine, employed in silica / Técnica de identificación de huevos de Dioctophyme renale en orina de gato, utilizada en sílice

A dioctofimatose é uma doença parasitária causada pelo helminto Dioctophyme renale, tendo como hospedeiros definitivos, cães, gatos, animais silvestres e também o homem, pois este parasito possui potencial zoonótico. Acomete os rins dos seus hospedeiros definitivos, geralmente o direito, mas podem ser encontrados também em outros locais. Embora seja descrito maior ocorrência de casos em cães, também há relatos desta parasitose em gatos. Uma das formas de diagnóstico é através da visualização de ovos do D. renale através do exame de urina. Porém, pelas características comportamentais dos gatos, a coleta de urina nesta espécie é de difícil execução. Portanto, através do estudo de técnicas para pesquisa de ovos deste parasito na urina dos gatos em sílica, presente nas caixas de areia, procura-se facilitar o diagnóstico nestes animais. Para realização deste trabalho, amostras de sílica foram contaminadas com urina contendo ovos de D. renale. As técnicas utilizadas para pesquisa de ovos foram: centrífugo-flutuação em solução hipersaturada glicosada, em duas densidades: 1.230g/ml e 1.275g/ml; flutuação espontânea em solução hipersaturada glicosada, em duas densidades: 1,230g/ml e 1,275g/ml e centrífugo-sedimentação. A avaliação das amostras foi realizada em diferentes tempos, distribuídos da seguinte forma: momento zero, 6 horas, 12 horas, 18 horas, 24 horas, 36 horas, 48 horas, 72 horas, 120 horas, 168 horas, 240 horas e 336 horas após contaminação do material. A técnica de centrífugo-sedimentação foi a que apresentou o melhor resultado, sendo possível identificar ovos morfologicamente viáveis de D. Renale durante os 14 dias de análise.

Dioctofimatosis is a parasitic disease caused by the helminth Dioctophyme renale, having as definitive hosts, dogs, cats, wild animals and also man, as this parasite has zoonotic potential. It affects the kidneys of its definitive hosts, usually the right, but can also be found in other places. Although a higher occurrence of cases in dogs has been described, there are also reports of this parasitosis in cats. One of the ways of diagnosing the disease is through the visualization of D. renale eggs through the urine exam. However, due to the behavioral characteristics of cats, urine collection in this species is difficult to perform. Therefore, through the study of techniques to search for eggs of this parasite in the urine of cats in silica, present in litter boxes, we seek to facilitate the diagnosis in these animals. To carry out this work, silica samples were contaminated with urine containing D. renale eggs. The techniques used for egg research were: centrifugal-flotation in glycosated hypersaturated solution, in two densities: 1,230g/ml and 1,275g/ml; spontaneous fluctuation in glycosated hypersaturated solution, in two densities: 1.230g/ml and 1.275g/ml and centrifugal-sedimentation. The evaluation of the samples was carried out at different times, distributed as follows: time zero, 6 hours, 12 hours, 18 hours, 24 hours, 36 hours, 48 hours, 72 hours, 120 hours, 168 hours, 240 hours and 336 hours after contamination of the material. The centrifugal-sedimentation technique showed the best result, making it possible to identify morphologically viable eggs from D. renale during the 14 days of analysis.

La dioctofimatosis es una enfermedad parasitaria causada por el helminto Dioctophyme renale, que tiene como hospedadores definitivos, perros, gatos, animales salvajes y también el hombre, ya que este parásito tiene potencial zoonótico. Afecta los riñones de sus huéspedes definitivos, generalmente el derecho, pero también se puede encontrar en otros lugares. Aunque se ha descrito una mayor incidencia de casos en perros, también hay informes de esta parasitosis en gatos. Una de las formas de diagnóstico es a través de la visualización de los huevos de D. renale a través del examen de orina. Sin embargo, debido a las características de comportamiento de los gatos, la recolección de orina en esta especie es difícil de realizar. Por lo tanto, a través del estudio de técnicas para buscar huevos de este parásito en laorina de gatos en sílice, presentes en cajas de arena, buscamos facilitar el diagnóstico en estos animales. Para llevar a cabo este trabajo, las muestras de sílice se contaminaron con orina que contenía huevos de D. renale. Las técnicas utilizadas para investigar los huevos fueron: flotación centrífuga en solución hipersaturada glicosilada, en dos densidades: 1.230 g/ml y 1.275 g/ml; fluctuación espontánea en solución glicosilada hipersaturada, en dos densidades: 1.230 g/ml y 1.275 g/ml y sedimentación centrífuga. La evaluación de las muestras se realizó en diferentes momentos, distribuidos de la siguiente manera: tiempo cero, 6 horas, 12 horas, 18 horas, 24 horas, 36 horas, 48 horas, 72 horas, 120 horas, 168 horas, 240 horas y 336 horas después de la contaminación del material. La técnica de sedimentación centrífuga mostró el mejor resultado, permitiendo identificar huevos morfológicamente viables de D. renale durante los 14 días de análisis.