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La leishmaniasis visceral canina (LVC) es una zoonosis de extrema importancia en la salud pública, en todo el mundo, con el 90% de los casos registrados en Brasil.  Es causada por el protozoario género Leishmania y su principal huésped es el perro doméstico y, para que se produzca la transmisión, es obligatoria la presencia del vector, el mosquito hematófago género Lutzomyia. El diagnóstico de la enfermedad es bastante difícil, ya que del 60 al 80% de los animales seropositivos son asintomáticos y las manifestaciones clínicas son muy inespecíficas.  Después de los cambios realizados por el Ministerio de Salud, actualmente está permitido llevar a cabo el tratamiento de animales positivos para LVC, en el que el medicamento más aceptado es Miltefosina, sin embargo, independientemente del tratamiento, el mejor método contra LVC es la prevención.  En el presente trabajo, se produjo un cuestionario a través de la plataforma Google Forms con 14 preguntas que cubren la leishmaniasis.  Se recogieron 65 respuestas de veterinarios de diferentes edades y estados de Brasil.  El 80% de los veterinarios dijeron que indicaban el tratamiento del animal en caso de leishmaniasis confirmada, mientras que el 3.08% todavía indica eutanasia.  Aunque no se recomienda, aún se observa el uso de anfotericina B y antimoniales pentavalentes en...(AU)

The canine visceral leishmaniasis (CVL) is a zoonosis extremely important for public health, of worldwide relevance, with 90% of the cases registered in Brazil. It´s caused by the protozoan from the genus Leishmania and its main host is the domestic dog. For the successful transmission, it must have the presence of the vector, a hematophagous mosquito from genus Lutyzomia. The diagnostic from the disease is extremely difficult, seen that 60% to 80% of the seropositive animals are asymptomatic and the clinical manifestations are very nonspecific. After changes made by the Health Ministry, it actually is permitted to realize the treatment of the positive animals to CVL, in which the most accepted medicament is Miltefosine. Yet, independent of the treatment, the best method against CVL is prevention. In the present job was produced a questionnaire through the platform Google Forms with 14 questions encompassing the Leishmaniasis. Were collected 65 answers veterinarians of different ages and states of Brazil.  80% of vets said to indicate the treatment of the animal in cases of leishmaniasis confirmed, while 3.08% still indicate euthanasia. Although not recommended, the use of amphotericin B and pentavalent antimonials is still seen in the treatment protocols, however, the majority (75.4%) opts for the use of Miltefosina, recommended. Vaccination, although accept...(AU)

A Leishmaniose visceral canina (LVC) é uma zoonose de extrema importância na saúde pública, de distribuição mundial, com 90% dos casos registrados no Brasil. É causada pelo protozoário gênero Leishmania e tem como principal hospedeiro o cão doméstico. Para que ocorra a transmissão, é obrigatória a presença do vetor, mosquito hematófago Lutzomyia sp. O diagnóstico da doença é bastante difícil, já que 60 a 80% dos animais soropositivos são assintomáticos e as manifestações clínicas são muito inespecíficas. Após mudanças realizadas pelo Ministério da Saúde, atualmente é permitido realizar o tratamento dos animais positivos para LVC, no qual o medicamento mais aceito é a miltefosina, porém, independente do tratamento, o melhor método contra a LVC é a prevenção. No presente trabalho foi produzido um questionário através da plataforma Google Forms com 14 perguntas englobando a Leishmaniose. Foram coletadas 65 respostas de médicos veterinários de diferentes idades e estados do Brasil.  80% dos veterinários disseram indicar o tratamento do animal em caso de leishmaniose confirmada, enquanto 3,08% ainda indicam a eutanásia. Embora não recomendados, ainda se nota o uso de anfotericina B e antimoniais pentavalentes nos protocolos de tratamento, porém a maioria (75,4%) opta pelo uso da miltefosina, recomendada. A vacinação, embora aceita pela maioria dos veterinários (95,38%)...(AU)

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Protein malnutrition causes anemia and leukopenia as it reduces hematopoietic precursors and impairs the production of mediators that regulate hematopoiesis. Hematopoiesis occurs in distinct bone marrow niches that modulate the processes of differentiation, proliferation and self-renewal of hematopoietic stem cells (HSCs). Mesenchymal stem cells (MSCs) contribute to the biochemical composition of bone marrow niches by the secretion of several growth factors and cytokines, and they play an important role in the regulation of HSCs and hematopoietic progenitors. In this study, we investigated the effect of protein malnutrition on the hematopoietic regulatory function of MSCs. C57BL/6NTaq mice were divided into control and protein malnutrition groups, which received, respectively, a normal protein diet (12% casein) and a low protein diet (2% casein). The results showed that protein malnutrition altered the synthesis of SCF, TFG-ß, Angpt-1, CXCL-12, and G-CSF by MSCs. Additionally, MSCs from the protein malnutrition group were not able to maintain the lymphoid, granulocytic and megakaryocytic-erythroid differentiation capacity compared to the MSCs of the control group. In this way, the comprehension of the role of MSCs on the regulation of the hematopoietic cells, in protein malnutrition states, is for the first time showed. Therefore, we infer that hematopoietic alterations caused by protein malnutrition are due to multifactorial alterations and, at least in part, the MSCs' contribution to hematological impairment.

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La leishmaniasis visceral canina (LVC) es una zoonosis de extrema importancia en la salud pública, en todo el mundo, con el 90% de los casos registrados en Brasil.  Es causada por el protozoario género Leishmania y su principal huésped es el perro doméstico y, para que se produzca la transmisión, es obligatoria la presencia del vector, el mosquito hematófago género Lutzomyia. El diagnóstico de la enfermedad es bastante difícil, ya que del 60 al 80% de los animales seropositivos son asintomáticos y las manifestaciones clínicas son muy inespecíficas.  Después de los cambios realizados por el Ministerio de Salud, actualmente está permitido llevar a cabo el tratamiento de animales positivos para LVC, en el que el medicamento más aceptado es Miltefosina, sin embargo, independientemente del tratamiento, el mejor método contra LVC es la prevención.  En el presente trabajo, se produjo un cuestionario a través de la plataforma Google Forms con 14 preguntas que cubren la leishmaniasis.  Se recogieron 65 respuestas de veterinarios de diferentes edades y estados de Brasil.  El 80% de los veterinarios dijeron que indicaban el tratamiento del animal en caso de leishmaniasis confirmada, mientras que el 3.08% todavía indica eutanasia.  Aunque no se recomienda, aún se observa el uso de anfotericina B y antimoniales pentavalentes en...

The canine visceral leishmaniasis (CVL) is a zoonosis extremely important for public health, of worldwide relevance, with 90% of the cases registered in Brazil. It´s caused by the protozoan from the genus Leishmania and its main host is the domestic dog. For the successful transmission, it must have the presence of the vector, a hematophagous mosquito from genus Lutyzomia. The diagnostic from the disease is extremely difficult, seen that 60% to 80% of the seropositive animals are asymptomatic and the clinical manifestations are very nonspecific. After changes made by the Health Ministry, it actually is permitted to realize the treatment of the positive animals to CVL, in which the most accepted medicament is Miltefosine. Yet, independent of the treatment, the best method against CVL is prevention. In the present job was produced a questionnaire through the platform Google Forms with 14 questions encompassing the Leishmaniasis. Were collected 65 answers veterinarians of different ages and states of Brazil.  80% of vets said to indicate the treatment of the animal in cases of leishmaniasis confirmed, while 3.08% still indicate euthanasia. Although not recommended, the use of amphotericin B and pentavalent antimonials is still seen in the treatment protocols, however, the majority (75.4%) opts for the use of Miltefosina, recommended. Vaccination, although accept...

A Leishmaniose visceral canina (LVC) é uma zoonose de extrema importância na saúde pública, de distribuição mundial, com 90% dos casos registrados no Brasil. É causada pelo protozoário gênero Leishmania e tem como principal hospedeiro o cão doméstico. Para que ocorra a transmissão, é obrigatória a presença do vetor, mosquito hematófago Lutzomyia sp. O diagnóstico da doença é bastante difícil, já que 60 a 80% dos animais soropositivos são assintomáticos e as manifestações clínicas são muito inespecíficas. Após mudanças realizadas pelo Ministério da Saúde, atualmente é permitido realizar o tratamento dos animais positivos para LVC, no qual o medicamento mais aceito é a miltefosina, porém, independente do tratamento, o melhor método contra a LVC é a prevenção. No presente trabalho foi produzido um questionário através da plataforma Google Forms com 14 perguntas englobando a Leishmaniose. Foram coletadas 65 respostas de médicos veterinários de diferentes idades e estados do Brasil.  80% dos veterinários disseram indicar o tratamento do animal em caso de leishmaniose confirmada, enquanto 3,08% ainda indicam a eutanásia. Embora não recomendados, ainda se nota o uso de anfotericina B e antimoniais pentavalentes nos protocolos de tratamento, porém a maioria (75,4%) opta pelo uso da miltefosina, recomendada. A vacinação, embora aceita pela maioria dos veterinários (95,38%)...

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BACKGROUND & AIMS: Protein malnutrition (PM) affects hematopoiesis leading to bone marrow (BM) hypoplasia and arrests hematopoietic stem cells (HSC) in G0/G1 cell cycle phases, which cause anemia and leukopenia. Hematopoiesis is mainly regulated by BM niches where endothelial cells (EC) present a key regulatory role. Thus, our objective is to evaluate whether PM affects the modulatory capacity of EC on hematopoiesis. METHODS: C57BL/6 male mice received for 5 weeks a normal protein diet (12% casein) or a low protein diet (2% casein). MSC were isolated and differentiated in vitro into EC and the synthesis of SCF, Ang-1, CXCL-12, IL-11, TGF-ß and G-CSF were evaluated. The HSC and hematopoietic progenitors were quantified and the EC capacity to modulate the hematopoietic system was also evaluated. Moreover, the ability of PM bone marrow to support hematopoieisis was assessed by proliferation of infused leukemic myelo-monoblasts cells. RESULTS: PM decreases HSC and hematopoietic progenitor pool and promotes cell cycle arrest and a lower proliferation rate of leukemic myelo-monoblasts. PM also committed hematopoietic regulatory characteristics from EC, resulting in the modification of both cell cycle pattern and hematopoietic differentiation. CONCLUSION: BM microenvironment is compromised in PM, and since PM disturbs EC, it becomes one of the factors responsible for the hematopoietic cell cycle arrest and impairment of HSC differentiation.

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Obesity is a chronic inflammatory disease that affects millions of people worldwide. Most studies observe the effects of a high-fat diet (HFD) in 10-12 weeks. This work investigated the effects induced by a HFD administered for 6 weeks on the nutritional status of mice and some aspects of the inflammatory response in mouse peritoneal macrophages. Male Swiss Webster mice, 2-3 months of age, were fed a control diet or HFD for 6 weeks. After this period, the mice were euthanized, and peritoneal macrophages were collected for immunoassays and assessment of biochemical parameters. A HFD was associated with increased cholesterol, insulin resistance, C-reactive protein (CRP), leptin, and serum resistin levels. Lipopolysaccharide (LPS)- stimulated adipocyte cultures of animals subjected to a HFD showed increased production of proinflammatory cytokines such as tumor necrosis factor alpha (TNF-α), interleukin-1 (IL-1), and interleukin-6 (IL-6). However, peritoneal macrophages of the HFD group showed no changes in the levels of these cytokines. LPS-stimulated peritoneal macrophages from HFD-treated animals showed a reduction in mRNA expression of TNF-α and IL-6, as well as a decrease in expression of the transcription factor nuclear factor-kappa B (NF-kB). In conclusion, HFD treatment for 6 weeks induces similar signs to metabolic syndrome and decreases the capacity of peritoneal macrophages to develop an appropriate inflammatory response to a bacterial component

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Micronutrients are indispensable for adequate metabolism, such as biochemical function and cell production. The production of blood cells is named haematopoiesis and this process is highly consuming due to the rapid turnover of the haematopoietic system and consequent demand for nutrients. It is well established that micronutrients are relevant to blood cell production, although some of the mechanisms of how micronutrients modulate haematopoiesis remain unknown. The aim of the present review is to summarise the effect of Fe, Mn, Ca, Mg, Na, K, Co, iodine, P, Se, Cu, Li and Zn on haematopoiesis. This review deals specifically with the physiological requirements of selected micronutrients to haematopoiesis, showing various studies related to the physiological requirements, deficiency or excess of these minerals on haematopoiesis. The literature selected includes studies in animal models and human subjects. In circumstances where these minerals have not been studied for a given condition, no information was used. All the selected minerals have an important role in haematopoiesis by influencing the quality and quantity of blood cell production. In addition, it is highly recommended that the established nutrition recommendations for these minerals be followed, because cases of excess or deficient mineral intake can affect the haematopoiesis process.

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The original version of this article [1], published on 28 June 2016, contains a mistake. The part labels in Fig. 1 are missing. The corrected version of Fig. 1 is given below.

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A desnutrição proteica continua sendo um dos principais problemas nutricionais do mundo. Trabalhos de nosso laboratório e de outros autores evidenciam que entre as alterações presentes na desnutrição proteica, está a alteração do tecido hemopoético, com modificações em componentes da matriz extracelular, alterações no ciclo celular da célula tronco/progenitora hemopoética, redução da produção de precursores hemopoéticos, tanto na série eritrocitária como na série leucocitária, levando a anemia e leucopenia. Os mecanismos de participação do Ca2+ nas células da medula óssea são pouco conhecidos, porém, sabe-se que ele atua no processo de hemopoese. Têm sido descrito que elevações da concentração de Ca2+ citoplasmático induzem a proliferação e diferenciação de células mielóides. A ação dessa via em indivíduos desnutridos também é pouco conhecida. Este estudo tem como objetivo avaliar o estabelecimento da celularidade medular in vitro, bem como investigar mecanismos moleculares envolvidos na proliferação e diferenciação dessa celularidade, além de avaliar a ação do cálcio na presença da interleucina-3 em células-tronco hemopoéticas murinas e sua modulação para avaliar alterações na via das MAPKs. Camundongos C57BL/6, machos e adultos foram submetidos à desnutrição proteica e, após a perda de aproximadamente 20% de seu peso corporal, as células da medula óssea foram colhidas. Essas células foram imunofenotipadas, além de reagirem com anticorpos específicos para caracterização da célula-tronco hemopoética e proteínas da via de sinalização de cálcio intracelular. Observamos que a celularidade do estroma medular em cultura de longa duração de animais desnutridos é alterada, principalmente em células de origem mesenquimal, que aparecem em maior número em desnutridos ao longo dos dias de cultura. Além disso, as ondas de cálcio intracelular estavam diminuídas em animais desnutridos, bem como as proteínas p-PKC, p-PLCy, CAMKII, p-AKT e p-STAT5 não respondem ao estímulo de IL-3, levando a uma deficiência da expressão das MAPK: ERK 1/2, JNK e p38. A desnutrição proteica pode causar alterações na celularidade estromal da medula óssea e na diferenciação das células tronco hemopoéticas pela via das MAPKs estimulada por IL-3

Protein malnutrition remains one of the world's major nutritional problems. Studies from our laboratory and others shown that alterations in protein malnutrition include hemopoietic tissue alterations, changes in extracellular matrix components, changes in the hemopoietic stem/progenitor cell tissue, reduction in the production of hemopoietic precursors, in the erythroid series as in the mieloyd series, leading to anemia and leukopenia. Mechanisms of Ca2+ participation in bone marrow cells are poorly understood, but no hemopoiesis has been developed. Elevations of cytoplasmic Ca2+ concentration in proliferation and differentiation of myeloid cells were included. Such an action through malnourished animals is also a little known. This study aims to evaluate the establishment of cellularity in vitro as well as investigate the molecular involvement in cell proliferation and differentiation, as well as to evaluate the action of calcium in the presence of IL-3 in hemopoietic stem cells and its modulation by analytical evaluations in the MAPKs pathway. C57BL/6, male adult mices were subjected to protein restriction and, after loss of approximately 20% of their body weight, bone marrow cells were harvested. These were immunophenotyped in addition to specific activation terms for the hemopoietic stem cell and intracellular signaling pathway proteins. We observed that the bone marrow cells in long-term culture of malnourished animals is altered, mainly in cells of mesenchymal origin, which appears in greater numbers in undernourished throughout the days of culture. In addition, as intracellular calcium waves decreased in malnourished animals, as well as the p-PKC, p-PLC, CAMKII, p-AKT and p-STAT5 proteins did not respond to IL-3, sugesting expression of the expression of MAPK: ERK 1/2, JNK and p38. Protein malnutrition may have changes in bone marrow capacity and differentiation of hemopoietic stem cells through IL-3-stimulated MAPKs

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BACKGROUND: Obesity and protein malnutrition are major food problems nowadays, affecting billions of people around the world. The nutrition transition that has occurred in recent decades is changing the nutritional profile, reducing malnutrition and increasing the percentage of obese people. The innate immune response is greatly influenced by diet, with significant changes in both malnutrition and obesity. Therefore, we investigate the effects of protein malnutrition and obesity in nutritional and immunological parameters in mice. RESULTS: Peritoneal macrophages of malnourished animals showed reduced functions of adhesion, spreading, and fungicidal activity; production of hydrogen peroxide and nitric oxide were lower, reflecting changes in the innate immune response. However, the high-fat animals had macrophage functions slightly increased. CONCLUSIONS: Animals subjected to low-protein diet have immunosuppression, and animals subjected to high-fat diet increased visceral adipose tissue and the presence of an inflammatory process with increased peritoneal macrophage activity and similar systemic changes to metabolic syndrome.

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The use of animals in scientific research has contributed significantly to the development of science, promoting various advances in understanding the metabolic machinery and the discovery of treatments and preventive measures applied to human and veterinary medicine. The development and use of alternative methods is encouraged; however, in some situations, the use of animals in accordance with ethical policies is still required. Established hematological and clinical chemistry reference values in laboratory animals are essential to evaluate functional changes; however, there are few data in the literature on these values, being fundamentally a comparative basis. The aim of this investigation was the establishment of hematological and clinical chemistry reference values in common strains/stocks of mice used in animal experimentation. Blood profile (hemogram, reticulocytes and myelogram) and clinical chemistry serum determination of total protein, albumin, glucose, cholesterol, triglycerides, calcium and phosphorus were evaluated using C57BL/6, BALB/c and Swiss Webster mice, male, 2-3 months old. The results standardize reference intervals in animals reared in Laboratory Animal Facility, reflecting the expected condition in rodents subjected to scientific research(AU)

O uso de animais na pesquisa científica tem contribuído significativamente para o desenvolvimento da ciência, promovendo vários avanços na compreensão da maquinaria metabólica, bem como a descoberta de tratamentos e medidas preventivas aplicadas à medicina humana e veterinária. O desenvolvimento e utilização de métodos alternativos é encorajado, no entanto, em algumas situações, ainda é necessária a utilização de animais em conformidade com termos éticos. Estabelecer valores de referência hematológicos e bioquímicos para animais de laboratório é essencial para avaliar alterações funcionais, no entanto, existem poucos dados na literatura sobre estes valores, sendo fundamentalmente uma base comparativa. O presente trabalho foi delineado para estabelecer valores de referência hematológicos e bioquímicos em linhagens camundongos utilizados em pesquisa científica. Foram avaliados o perfil sanguíneo (hemograma, reticulócitos e mielograma) e a determinação bioquímica sérica de proteínas totais, albumina, glicose, colesterol, triglicerídeos, cálcio e fósforo. Foram utilizados camundongos C57BL/6, BALB/c e Swiss Webster, do sexo masculino, 2-3 meses de idade. Os resultados padronizam intervalos de referência em camundongos criados em Biotério, refletindo a condição esperada nesses animais submetidos à investigação científica(AU)

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The use of animals in scientific research has contributed significantly to the development of science, promoting various advances in understanding the metabolic machinery and the discovery of treatments and preventive measures applied to human and veterinary medicine. The development and use of alternative methods is encouraged; however, in some situations, the use of animals in accordance with ethical policies is still required. Established hematological and clinical chemistry reference values in laboratory animals are essential to evaluate functional changes; however, there are few data in the literature on these values, being fundamentally a comparative basis. The aim of this investigation was the establishment of hematological and clinical chemistry reference values in common strains/stocks of mice used in animal experimentation. Blood profile (hemogram, reticulocytes and myelogram) and clinical chemistry serum determination of total protein, albumin, glucose, cholesterol, triglycerides, calcium and phosphorus were evaluated using C57BL/6, BALB/c and Swiss Webster mice, male, 2-3 months old. The results standardize reference intervals in animals reared in Laboratory Animal Facility, reflecting the expected condition in rodents subjected to scientific research...

O uso de animais na pesquisa científica tem contribuído significativamente para o desenvolvimento da ciência, promovendo vários avanços na compreensão da maquinaria metabólica, bem como a descoberta de tratamentos e medidas preventivas aplicadas à medicina humana e veterinária. O desenvolvimento e utilização de métodos alternativos é encorajado, no entanto, em algumas situações, ainda é necessária a utilização de animais em conformidade com termos éticos. Estabelecer valores de referência hematológicos e bioquímicos para animais de laboratório é essencial para avaliar alterações funcionais, no entanto, existem poucos dados na literatura sobre estes valores, sendo fundamentalmente uma base comparativa. O presente trabalho foi delineado para estabelecer valores de referência hematológicos e bioquímicos em linhagens camundongos utilizados em pesquisa científica. Foram avaliados o perfil sanguíneo (hemograma, reticulócitos e mielograma) e a determinação bioquímica sérica de proteínas totais, albumina, glicose, colesterol, triglicerídeos, cálcio e fósforo. Foram utilizados camundongos C57BL/6, BALB/c e Swiss Webster, do sexo masculino, 2-3 meses de idade. Os resultados padronizam intervalos de referência em camundongos criados em Biotério, refletindo a condição esperada nesses animais submetidos à investigação científica...

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Malnutrition is a nutritional condition that can affect many aspects of the immunological response, including by decreasing cell migration and stimulating phagocytosis; the bactericidal response; changes in reactive oxygen and nitrogen species production; and the production of proinflammatory cytokines, such as tumor necrosis factor alpha (TNF-α). This cytokine is primarily produced by macrophages and is associated with a wide range of biological activities, including inflammatory processes, growth, differentiation, and apoptosis. TNF-α acts through the activation of TNF receptors, and mainly receptor I (TNF-RI), which is responsible for most of the effects of TNF-α. This activation triggers a series of intracellular events that result in the activation of the transcription factor NF-κB. In this study, we evaluated the expression of the transcription factor NF-κB, mediated by TNF-α through TNF-RI, in a protein malnutrition (PM) model. Adult male BALB/c mice were submitted to PM, and after loss of approximately 20% of their body weight, their peritoneal macrophages were collected and cultivated with or without TNF-α. The expression of TNF-RI and proteins in its signaling pathway (TRADD, TRAF, RIP, IKK, IKB-α, pIKB-α, NF-κB, and pNF-κB) were evaluated, as well as cytokine production (IL-1α, IL-1ß, IL-6, and IL-12). The compiled results highlight that the malnourished animals presented anemia, leukopenia, and decreased peritoneal cellularity. TNF-RI expression was reduced in the malnourished animals, and NF-κB phosphorylation was also reduced, in association with reduced production of IL-1ß and IL-12. In this study, we observed aspects related to the innate immune response, and the outcome data allowed us to conclude that nutritional status interferes with the macrophage activation and the response capabilities of these cells.

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Changes in lifestyle such as increase in high-fat food consumption are an important cause for vascular diseases. The present study aimed to investigate the involvement of ACE and TGF- ß in the aorta stiffness induced by high-fat diet. C57BL/6 male mice were divided in two groups according to their diet for 8 weeks: standard diet (ST) and high-fat diet (HF). At the end of the protocol, body weight gain, adipose tissue content, serum lipids and glucose levels, and aorta morphometric and biochemical measurements were performed. Analysis of collagen fibers by picrosirius staining of aorta slices showed that HF diet promoted increase of thin (55%) and thick (100%) collagen fibers deposition and concomitant disorganization of these fibers orientations in the aorta vascular wall (50%). To unravel the mechanism involved, myeloperoxidase (MPO) and angiotensin I converting enzyme (ACE) were evaluated by protein expression and enzyme activity. HF diet increased MPO (90%) and ACE (28%) activities, as well as protein expression of ACE. TGF-ß was also increased in aorta tissue of HF diet mice after 8 weeks. Altogether, we have observed that the HF diet-induced aortic stiffening may be associated with increased oxidative stress damage and activation of the RAS in vascular tissue.

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