Effects of antifreeze protein from Lolium perenne L. (LpAFP) in the vitrification of in vitro-produced bovine embryos.

In the present study, the cryoprotective effects of Lolium perenne antifreeze protein (LpAFP) on the vitrification of bovine embryos were evaluated. In vitro-produced blastocysts were divided into two groups: the control group (CG) without the addition of LpAFP and the treatment group (TG) with the addition of 500 ng/ml of LpAFP in the equilibrium and vitrification solution. Vitrification was carried out by transferring the blastocysts to the equilibrium solution [7.5% ethylene glycol (EG) and 7.5% dimethyl sulfoxide (DMSO)] for 2 min and then to the vitrification solution (15% EG, 15% DMSO and 0.5M sucrose). The blastocysts were deposited on a cryotop device and submerged in liquid nitrogen. Warming was carried out in three steps in solutions with different sucrose concentrations (1.0, 0.5, and 0.0 M, respectively). Embryos were evaluated for re-expansion/hatching, the total cell count, and ultrastructural analysis. There was no significant difference in the re-expansion rate 24 h after warming; however, there was variation (P < 0.05) in the hatching rate in the TG and the total number of cells 24 h after warming was higher in the TG (114.87 ± 7.24) when compared with the CG (91.81 ± 4.94). The ultrastructural analysis showed changes in organelles related to the vitrification process but, in the TG, there was less damage to mitochondria and rough endoplasmic reticulum compared with the CG. In conclusion, the addition of 500 ng/ml of LpAFP during the vitrification of in vitro-produced bovine embryos improved the hatching rate and total cell number of blastocysts after warming and mitigated intracellular damage.

Immunolocalization of proteins in the spermatogenesis process of canine.

Spermatogenesis is a process in which differentiated cells are produced and the adult stem cell population-known as spermatogonial stem cells (SSCs)-is continuously replenished. However, the molecular mechanisms underlying these processes are not fully understood in the canine species. We addressed this in this study by analysing the expression of specific markers in spermatogonia of seminiferous tubules of canine testes. SSCs at different stages of reproductive development (prepubertal and adult) were examined by immunohistochemistry and flow cytometry. Glial cell-derived neurotrophic factor family receptor alpha-1 (GFRA1), deleted in azoospermia-like (DAZL) and promyelocytic leukaemia zinc finger (PLZF) were expressed in SSCs, while stimulated by retinoic acid gene 8 (STRA8) was detected only in undifferentiated spermatogonia in prepubertal testis and differentiated spermatogonia and spermatocytes in adult canine. Octamer-binding transcription factor 4 (OCT4) showed an expression pattern, and the levels did not differ between the groups examined. However, C-kit expression varied as a function of reproductive developmental stage. Our results demonstrate that these proteins play critical roles in the self-renewal and differentiation of SSCs and can serve as markers to identify canine spermatogonia at specific stages of development.

Comparative Development of Embryonic Age by Organogenesis in Domestic Dogs and Cats.

The precise determination of the embryonic chronology is very important in reproductive biotechnologies, especially in estimating embryonic age. Thus, there is a need for greater knowledge and standardization for determining the chronology of embryonic development and functional morphology. We describe aspects of embryonic development in two domestic carnivores to add knowledge about organ peculiarities and for application in veterinary practice, in prenatal development and in the biotechnology fields. We found that the development of differential characteristics of embryonic organs occurs in the first trimester of pregnancy for both species. Thus, using the combination of the crown-rump length, macroscopic analysis and optical microscopy, it is possible to predict gestational age more precisely in animals that lack a defined breed and establish an embryonic pattern.

Huntington disease and Huntington disease-like in a case series from Brazil.

The aim of this study was to identify the relative frequency of Huntington's disease (HD) and HD-like (HDL) disorders HDL1, HDL2, spinocerebellar ataxia type 2 (SCA2), SCA17, dentatorubral-pallidoluysian degeneration (DRPLA), benign hereditary chorea, neuroferritinopathy and chorea-acanthocytosis (CHAC), in a series of Brazilian families. Patients were recruited in seven centers if they or their relatives presented at least chorea, besides other findings. Molecular studies of HTT, ATXN2, TBP, ATN1, JPH3, FTL, NKX2-1/TITF1 and VPS13A genes were performed. A total of 104 families were ascertained from 2001 to 2012: 71 families from South, 25 from Southeast and 8 from Northeast Brazil. There were 93 HD, 4 HDL2 and 1 SCA2 families. Eleven of 104 index cases did not have a family history: 10 with HD. Clinical characteristics were similar between HD and non-HD cases. In HD, the median expanded (CAG)n (range) was 44 (40-81) units; R(2) between expanded HTT and age-at-onset (AO) was 0.55 (p=0.0001, Pearson). HDL2 was found in Rio de Janeiro (2 of 9 families) and Rio Grande do Sul states (2 of 68 families). We detected HD in 89.4%, HDL2 in 3.8% and SCA2 in 1% of 104 Brazilian families. There were no cases of HDL1, SCA17, DRPLA, neuroferritinopathy, benign hereditary chorea or CHAC. Only six families (5.8%) remained without diagnosis.

Growth and wear characteristics of individual claws in young dairy calves.

Data are limited on how cow hooves develop early in life and how this will affect susceptibility to lameness and claw disorders later in life. The aim of this study was to characterize individual claw growth and wear in dairy calves. A total of 90 male Holstein calves <1 wk old were enrolled in this completely randomized design experiment and monitored until wk 20 of age. Evaluation of hoof development was conducted by visual inspection, and individual claw measurements were taken with a graduated ruler. Claws were numbered from 1 to 8 to maintain consistent data collection, where front claws were numbered 1 to 4 (left to right) and rear claws were 5 to 8. Lateral claws were numbered 1, 4, 5, and 8, and medial claws were 2, 3, 6, and 7. Measurements included length from the coronary band to the end of the hoof wall and from the coronary band to the groove line, resulting in the variables claw length (CL) and groove length (GL), respectively. Hoof development was evaluated at wk 0, 5, 10, 15, and 20. All evaluations were performed by the same person throughout the study to eliminate variation between observers. Hoof growth and wear were derived from CL and GL measurements and analyzed from wk 0 to 20. Claw length at wk 0 was different across claw positions, and maximal claw length was observed in claws in positions 6 and 7 (i.e., rear medial claws). A similar growth pattern in claw length was observed when evaluated from wk 0 to 20, where a greater claw length was observed in claws 6 and 7 compared with other claws. In contrast to claw length, claw wear at wk 20 was lower in claws 6 and 7 compared with other claws. Compared with rear claws, front claws had greater wear at wk 20, and compared with medial claws, lateral claws had greater wear at wk 20. Factors associated with claw length differences at wk 0 remain to be elucidated, but the fact that this uneven claw length difference was maintained 20 wk after birth is puzzling. The complementary claw length to wear described greater wear in claws 1 and 4 (i.e., front lateral) in young calves, which is translated into lower claw length in the same claws by wk 20 after birth. Future research in postnatal hoof growth should strive to understand the potential biological significance of this effect on lameness resistance and longevity of dairy cows.

Dynapenic Abdominal Obesity as a Risk Factor for Metabolic Syndrome in Individual 50 Years of Age or Older: English Longitudinal Study of Ageing.

OBJECTIVES: To analyse whether dynapenic abdominal obesity is a risk factor for Metabolic syndrome (MetS) and its components in individuals 50 years of age or older. DESIGN: A longitudinal study was conducted with an eight-year follow-up. SETTING: Representative sample of community-dwelling participants of the English Longitudinal Study of Ageing (ELSA). PARTICIPANTS: 3,952 individuals free of MetS at baseline. MEASUREMENTS: Dynapenic abdominal obesity was defined based on waist circumference (> 102 cm for men and > 88 cm for women) and grip strength (< 26 kg for men and < 16 kg for women). The participants were classified as non-abdominally obese/non-dynapenic (NAO/ND - reference group), abdominally obese/non-dynapenic (AO/ND), non-abdominally obese/dynapenic (NAO/D) and abdominally obese/dynapenic (AO/D). The outcome was the incidence of MetS based on the presence of three or more of the following criteria: hypertriglyceridemia, hyperglycaemia, low HDL cholesterol, arterial hypertension or body mass index ≥ 30 kg/m2 throughout eight-year follow-up. Additionally, the incidence of each component of MetS was also analyzed. Poisson regression models were run and controlled for sociodemographic, behavioural and clinical variables. RESULTS: The mean age of the participants was 65 years and 55% were women. The prevalence of AO/ND, NAO/D and AO/D were 35.3, 4.3 and 2.2%, respectively. At the end of follow-up 558 incident cases of MetS were recorded. The adjusted model demonstrated that although abdominal obesity was a risk factor for MetS (IRR: 2.26; 95% CI: 1.87 - 2.73), the IRR was greater in AO/D individuals (IRR: 3.34; 95% CI: 2.03 - 5.50) compared with ND/NAO group. Furthermore, ND/AO was a risk factor for incidence of hypertriglyceridemia (IRR: 1.27; 95% CI: 1.06 - 1.52), hyperglycaemia (IRR: 1.41; 95% CI: 1.18 - 1.69), low HDL cholesterol (IRR: 1.70; 95% CI: 1.32 - 2.19) and BMI ≥ 30 kg/m2 (IRR: 2.58; 95% CI: 2.04 - 3.26) while D/AO was a risk factor for hyperglycaemia (IRR: 1.78; 95% CI: 1.02 - 3.10), low HDL cholesterol (IRR: 2.36; 95% CI: 1.10 - 5.08), and BMI ≥ 30 kg/m2 (IRR: 2.79; 95% CI: 1.38 - 5.62). CONCLUSIONS: Dynapenic abdominal obesity increases the risk of MetS, with a higher IRR compared to obesity alone. The understanding of this synergic action could guide specific clinical strategies, enabling the prevention of metabolic changes that can lead to cardiovascular disease, disability and death.

Effects of temporary calf removal and eCG on pregnancy rates to timed-insemination in progesterone-treated postpartum Nellore cows.

The objective was to evaluate the effects of temporary calf removal (TCR), eCG administration, or both, in a progesterone-based protocol. Suckled Nellore cows (40-80 d postpartum, n=443) with body condition scores from 2.0 to 3.5 (5-point scale) on three farms were all given a synchronizing protocol (PEPE). At the start (designated Day 0), cows were given an intravaginal device (1.0 g of progesterone) and 2.5mg of estradiol benzoate (EB) im. On Day 8, the device was removed and cows were given PGF(2 alpha) (150 microg of D-cloprostenol im), followed in 24h by 1.0mg EB im, and 30-36 h thereafter, fixed-time AI. The design was a 2 x 2 factorial; main effects were TCR (54-60 h; from device removal to FTAI) and eCG treatment (300 IU im, concurrent with PGF(2 alpha)). Transrectal ultrasonography was done on Days -10 and 0 to detect anestrus (absence of a CL at both examinations) and approximately 30 d after FTAI (pregnancy diagnosis). Data were analyzed by logistic regression. The following variables did not significantly affect pregnancy rates: farm, postpartum interval, cyclicity, inseminators, and semen (sire). Overall, 77% of the cows were deemed anestrus. Pregnancy rates were similar (P>0.05) among treatment groups: Control (54/108=50.0%), TCR (44/106=41.5%), eCG (63/116=54.3%), and TCR+eCG (49/113=43.4%). Pregnancy rate was higher in multiparous than primiparous cows (186/360, 51.7% vs. 24/83, 28.9%, P<0.01), but was not significantly affected by cyclicity status or body condition score. In conclusion, temporary calf removal, eCG, or both, did not significantly increase pregnancy rate to timed-insemination in a progesterone-based synchronization protocol in postpartum Nellore cows with acceptable body condition.

Idiopathic seasonal alopecia in horse: case report / Alopecia sazonal idiopática em equino: relato de caso

This report describes the first case of idiopathic seasonal alopecia in a horse in Brazil. The disease is of unknown etiology, characterized by alopecic processes in the thoracic and lateral abdominal regions, in a bilaterally symmetrical way. An eight-year-old male grade horse was treated presenting hair loss in a bilaterally symmetrical manner in the arm and abdomen areas, without any other associated clinical signs. The areas with alopecia showed no pruritus, inflammation or scaling. On the epidermis, the histological evaluation presented irregular hyperplasia, hyperpigmentation, compact orthokeratosis, edema and an inflammatory infiltrate. The hair follicles were active and containing hair shaft. The case was monitored with photographic records for two consecutive years (2012 to 2014), in which the hair fall occurred at the end of autumn with spontaneous hair growth in the middle of the summer. The diagnosis was based on the history, histopathology and photographic follow-up performed. Although mentioned in the literature, this is the first clinical and pathological description of such disorder affecting an equine in Brazil.(AU)

Relata-se o primeiro caso de alopecia sazonal idiopática em um equino no Brasil, doença de etiologia desconhecida, caracterizada por processos alopécicos, nas regiões torácicas e abdominais laterais, de forma simétrica bilateralmente. Um equino mestiço, macho, de oito anos de idade, foi atendido sob queixa de perda dos pelos em regiões do tórax e do abdômen, simétrica bilateralmente, sem qualquer outro sinal clínico associado. As regiões alopécicas não apresentavam prurido, inflamação nem descamação. A avaliação histológica revelou, na epiderme, hiperplasia irregular, hiperpigmentação e ortoqueratose compacta, edema e infiltrado inflamatório. Os folículos pilosos estavam ativos e contendo hastes de pelos. O caso foi acompanhado com registros fotográficos durante dois anos consecutivos (2012 a 2014), com a queda do pelo acontecendo no final do outono e com retorno espontâneo em meados do verão. O diagnóstico baseou-se no histórico, na histopatologia e no acompanhamento fotográfico. Mesmo sendo mencionada na literatura, esta é a primeira descrição clínico-patológica de tal distúrbio acometendo um equino no Brasil.(AU)

Medidas lineares e angulares não influenciam o tipo de marcha em cavalos Campeiros / Linear and angular measures do not influence the type of march in Campeiro horses

A marcha é um andamento natural de algumas raças de equinos, o qual resulta de movimentos coordenados, e é o andamento característico dos cavalos Campeiros. O objetivo do presente trabalho foi determinar relações entre medidas lineares e angulares com o tipo de marcha dos cavalos da raça Campeiro. Foram avaliados 113 equinos adultos, sendo realizadas 12 medidas lineares e 11 angulares de cada animal. Para obtenção das medidas lineares, utilizou-se hipômetro e fita métrica, e, para as medidas angulares, artrogoniômetro e podogoniômetro. Para avaliar e classificar a marcha, os animais foram montados e filmados por vista lateral. Dos 113 animais, 36 (32%) apresentaram marcha incompleta, 74 (65%) marcha completa, e três (3%) a guinilha. Dos equinos com marcha completa, 20 (27%) apresentaram marcha batida, 14 (19%) marcha de centro e 40 (54%) marcha picada. Apenas a medida linear, altura da garupa, apresentou diferença entre os tipos de andamentos (P<0,011). Pode-se concluir que as medidas lineares e angulares dos equinos Campeiros apresentam valores similares entre as variações da marcha, demonstrando equivalente morfologia independentemente da categoria da marcha.(AU)

The march is a natural gait of some breeds of horses, which results from coordinated movements, and is the characteristic gait of Campeiro horses. The objective of this study was to determine relationships between linear and angular measures with the type of march of the Campeiro racehorses. A total of 113 adult horses were evaluated and 12 linear and 11 angular measurements of each animal were performed. To obtain the linear measurements, we used a hypometer and a tape measure and for the angular measurements, an arthrogoniometer and podogoniometer. To evaluate and classify the gait the animals were mounted and filmed by lateral view. Of the 113 animals, 36 (32%) had an incomplete gait, 74 (65%) had a complete gait and three (3%) had a guinilha gait. Of the horses with complete gait, 20 (27%) presented batida quick march, 14 (19%) a central march and 40 (54%) a split march. Only the linear measure, the height of the rump, presented difference between the types of movements (P< 0.011). It can be concluded that the linear and angular measurements of the Campeiro equines present similar values between the march variations, demonstrating morphological equivalent regardless of the march category.(AU)

Isolation and characterization of mesenchymal stem cells from the yolk sacs of bovine embryos.

The yolk sac (YS) represents a promising source of stem cells for research because of the hematopoietic and mesenchymal cell niches that are present in this structure during the development of the embryo. In this study, we report on the isolation and characterization of YS tissue and mesenchymal stem cells (MSCs) derived from bovine YSs. Our results show that the YS is macroscopically located in the exocoelomic cavity in the ventral portion of the embryo and consists of a transparent membrane formed by a central sac-like portion and two ventrally elongated projections. Immunohistochemistry analyses were positive for OCT4, CD90, CD105, and CD44 markers in the YS of both gestational age groups. The MSCs of bovine YS were isolated using enzymatic digestion and were grown in vitro for at least 11 passages to verify their capacity to proliferate. These cells were also subjected to immunophenotypic characterization that revealed the presence of CD90, CD105, and CD79 and the absence of CD45, CD44, and CD79, which are positive and negative markers of MSCs, respectively. To prove their multipotency, the cells were induced to differentiate into three cell types, chondrocytes, osteoblasts, and adipocytes, which were stained with tissue-specific dyes (chondrogenic: Alcian Blue, osteogenic: Alizarin Red, and adipogenic: Oil Red O) to confirm differentiation. Gene expression analyses showed no differences in the patterns of gene expression between the groups or passages tested, with the exception of the expression of SOX2, which was slightly different in the G1P3 group compared to the other groups. Our results suggest that YS tissue from bovines can be used as a source of MSCs, which makes YS tissue-derived cells an interesting option for cell therapy and regenerative medicine.

Involvement of AOX and UCP pathways in the post-harvest ripening of papaya fruits.

Enhanced respiration during ripening in climacteric fruits is sometimes associated with an uncoupling between the ATP synthesis and the mitochondrial electron transport chain. While the participation of two energy-dissipating systems, one of which is mediated by the alternative oxidase (AOX) and the other mediated by the uncoupling protein (UCP), has been linked to fruit ripening, the relation between the activation of both mitochondrial uncoupling systems with the transient increase of ethylene synthesis (ethylene peak) remains unclear. To elucidate this question, ethylene emission and the two uncoupling (AOX and UCP) pathways were monitored in harvested papaya fruit during the ripening, from green to fully yellow skin. The results confirmed the typical climacteric behavior for papaya fruit: an initial increase in endogenous ethylene emission which reaches a maximum (peak) in the intermediate ripening stage, before finally declining to a basal level in ripe fruit. Respiration of intact fruit also increased and achieved higher levels at the end of ripening. On the other hand, in purified mitochondria extracted from fruit pulp the total respiration and respiratory control decrease while an increase in the participation of AOX and UCP pathways was markedly evident during papaya ripening. There was an increase in the AOX capacity during the transition from green fruit to the intermediate stage that accompanied the transient ethylene peak, while the O2 consumption triggered by UCP activation increased by 80% from the beginning to end stage of fruit ripening. Expression analyses of AOX (AOX1 and 2) and UCP (UCP1-5) genes revealed that the increases in the AOX and UCP capacities were linked to a higher expression of AOX1 and UCP (mainly UCP1) genes, respectively. In silico promoter analyses of both genes showed the presence of ethylene-responsive cis-elements in UCP1 and UCP2 genes. Overall, the data suggest a differential activation of AOX and UCP pathways in regulation related to the ethylene peak and induction of specific genes such as AOX1 and UCP1.

Testicular schistosomiasis mansoni: a differential diagnostic problem with testicular neoplasias.

We report a case of testicular schistosomiasis mansoni that was surgically treated as a tumor. Massive enlargement of the testicle (twice the original volume) was due to an extensive granulomatous reaction.

Isolation of a trypsin inhibitor from Echinodorus paniculatus seeds by affinity chromatography on immobilized Cratylia mollis isolectins.

A highly purified trypsin inhibitor was obtained from Echinodorus paniculatus when an extract prepared from E. paniculatus seed flour (25 gl(-1), with 0.1 M ammonium acetate buffer, pH 8.3, under agitation for 6 min at 28 degrees C) was chromatographed on Sephadex G-25 (12 mlh(-1)), followed by affinity chromatography on immobilized Cratylia mollis isolectins (Cra Iso 1,2,3-Sepharose). The column chromatography was performed at 24 degrees C; the matrix was washed (30 mlh(-1)) with 0.1 M sodium phosphate buffer, pH 7.4 or with the same buffer containing 0.2 M glucose, followed by application of inhibitor sample and elution with 0.015 M sodium borate buffer, pH 7.4, or 1.0 M NaCl. A purified fraction of inhibitor was obtained by gel filtration chromatography (GF-450/HPLC column). Trypsin inhibitory activity was eliminated when the inhibitor was treated with metaperiodate showing that the carbohydrate moiety was important for trypsin inhibition. Binding of inhibitor was also evaluated on immobilized concanavalin A (Con A-Sepharose) using previously described chromatographic conditions with results similar to Cra Iso 1,2,3-Sepharose chromatography.

Clinics in diagnostic imaging (52). Spinal cord schistosomiasis.

A 2-year-old Brazilian boy presented with bilateral leg weakness and constipation, followed by development of progressive paraparesis and bladder dysfunction. Neurological examination revealed flaccid paraparesis. Blood tests and CSF analysis showed eosinophilia. The MR examination revealed a spinal cord mass extending from T9 to L1 levels, with a heterogeneously-enhancing solid component and a cystic component. Stool tests for Schistosoma mansoni eggs were positive. The patient underwent surgery, the intramedullary mass was partially resected, and the diagnosis of spinal cord infection by Schistosoma mansoni was confirmed. After surgery, the patient was treated with praziquantel and oxamniquine. He was discharged with partial improvement of the lower extremity weakness and bowel/bladder function. The clinical and imaging features of spinal cord schistosomiasis are reviewed.

[Hereditary hemochromatosis. Case report and review of the literature]. / Hemocromatose hereditária. Relato de caso e revisão da literatura.

BACKGROUND: HFE-associated hemochromatosis is one of the most common inherited liver disease in Caucasian populations and refers to the association of increased iron stores with tissue damage (e.g., cirrhosis, diabetes, cardiomyopathy), which is progressive when diagnosis and treatment are delayed. AIMS: Description of a case of hereditary hemochromatosis in an asymptomatic 44-years-old patient, whose diagnosis was made through casual identification of abnormal iron markers. We will also present a brief review of the literature about the topic. CONCLUSIONS: Hereditary hemochromatosis is an ideal disease for primary prevention since the disease can be detected well before serious complications develop. This intervention has been shown to prevent the manifestations of the disease, altering its natural history.

Fatal evolution of systemic lupus erythematosus associated with Crohn's disease.

The authors describe the case of a young Brazilian woman who was treated of ileocolonic Crohn's disease sparing rectum, as confirmed by colonoscopy and histopathological examination. After a 4-year course of sulfasalazine treatment, she presented with skin facial lesions in vespertilio, fever, arthralgias and high titers of anti-ANA and LE cells. A sulfasalazine-induced lupus syndrome was diagnosed, because after sulfasalazine withdrawal and a short course of prednisone, the clinical symptoms disappeared and the laboratory tests returned to normal. Mesalazine 3 g/day was started and the patient remained well for the next 3 years, when she was again admitted with fever, weakness, arthralgias, diplopy, strabismus and hypoaesthesia in both hands and feet, microhematuria, haematic casts, hypocomplementemia and high titers of autoimmune antibodies. A diagnosis of associated systemic lupus erythematosus was made. Although a pulsotherapy with methylprednisolone was started, no improvement was noticed. A cyclophosphamide trial was tried and again no positive results occurred. The patient evolved to severe clinical manifestations of general vasculitis affecting the central and peripheral nervous system and lungs, having a fatal evolution after 2 weeks. Although uncommon, the association of both disease may occur, and the authors call attention to this possibility, making a brief review of literature.

[Hepatic functional changes induced by the combined use of isoniazid, pyrazinamide and rifampicin in the treatment of pulmonary tuberculosis]. / Alterações funcionais hepáticas induzidas pelo uso concomitante de isoniazida, pirazinamida e rifampicina no tratamento da tuberculose pulmonar.

Antituberculosis therapy commonly used for pulmonary tuberculosis in Brazil include isoniazid (440 mg), rifampicin (600 mg) both for six months plus pyrazinamide (2 g) together in the first two months. Such therapy may induce acute or chronic liver damage in some individuals. The purpose of this study is to evaluate 1096 patients treated with antituberculous drugs, being 773 males and 323 females. Clinical and laboratory signs of hepatic cell injury was present in 66 patients. Serum bilirubin and transaminase levels were evaluated in 21 (31.81%) and 45 (68.19%) respectively, with a female preponderance. Early return to normal values occurred more frequently among alcoholic drinkers and non-cigarette smokers. Liver injury was characterized as being mild and moderate and the type of injury associated was represented by pure cholestasis and hepatocanalicular lesions. Probably, rifampicin is the drug responsible for this kind of evolution aggravating the hepatotoxicity induces by isoniazid and pyrazinamide.

[Use of the upper gastrointestinal endoscopy in dyspeptic patients]. / Emprego da endoscopia digestiva alta em pacientes dispépticos.

BACKGROUND AND AIMS: Dyspepsia is a common complaint that may signal the presence of diseases like cancer or peptic ulcer. The aim of our study was to assess if the clinical patterns of dyspepsia can be considered a valid guideline for the appropriate use of endoscopy. METHODS: According to the symptomatological patterns, our 243 patients were defined as sufferers from: ulcer-like (93 patients), reflux-like (25) and dismotility-like dyspepsia (125). Erosive gastritis and erosive duodenitis were regarded as minor inflammatory lesions. RESULTS: A negative endoscopy (normal or presenting minor inflammatory lesions) was found in 36.6% of ulcer-like dyspepsia patients: this rate was 52% in the reflux-like group, and 49.6% in the dismotility-like one. Duodenal ulcer was the most frequent abnormal lesion in the three groups. The frequency of negative endoscopies was significantly higher in dismotility-like than in ulcer-like (49.6% vs. 36.6%--P < 0.05) dyspepsia. In those patients with dismotility-like dyspepsia under 41 years, the rate of negative endoscopies was 72.7%, and neoplasms were not observed. CONCLUSION: Our data indicate that endoscopy could be considered inappropriate for patients under 41 years old with dismotility-like dyspepsia. These subjects account for 18.1% of the patients studied, what could lead to a good percentage of reduction in endoscopic service load.

[Changes in ultra rapid urease test and histopathological examination for Helicobacter pylori by antisecretory drugs]. / Alterações no teste ultra-rápido da urease e no exame anatomopatológico para Helicobacter pylori induzidas por drogas anti-secretoras.

BACKGROUND: One of the major problems when evaluating dyspeptic patients at public hospitals is the large interval between the consultation and the endoscopy, leading to the prescription of antisecretory drugs, what can be responsible for false results on examinations. AIM: To evaluate changes in ultrarapid urease test and histopathological examination for Helicobacter pylori by antisecretory drugs. METHODS: In a prospective double-blind study, 50 patients with dyspeptic complaints and endoscopic diagnosis of peptic ulcer, erosive gastritis, esophagitis or duodenitis with a positive urease test, were randomized to a 7-day course of treatment with either omeprazole 20 mg or ranitidine 300 mg a day. Before and after treatment, two biopsy specimens each were obtained from the antrum and corpus and an ultrarapid urease test and a histopathological examination for Helicobacter pylori were performed. RESULTS: There were no significant changes in the results of ultrarapid urease test and histopathological examination for Helicobacter pylori after treatment with ranitidine. With omeprazole, we observed a decrease in positive results in ultrarapid urease test and histopathological examination for Helicobacter pylori in the antrum, but not in the corpus. CONCLUSION: Omeprazole, used for 7 days can lead to negative results in ultrarapid urease test and histopathological examination for Helicobacter pylori in the antrum, and should not be employed in patients before the endoscopy is performed.