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Soares FO, Rosado IR, Sousa MVC, Dumont CF, Bittar JFF, Martin I, Beletti ME, Melo RT, Alves EGL. Osteomyelitis by Microsporum canis and Staphylococcus spp. in cat (Felis catus) - case report. BMC Vet Res 2024; 20:58. [PMID: 38374006 PMCID: PMC10875912 DOI: 10.1186/s12917-024-03904-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 01/29/2024] [Indexed: 02/21/2024] Open
Abstract
BACKGROUND Staphylococcus spp and Microsporum canis are zoonotic microorganisms which can cause infections and systemic diseases. The bone infection is usually caused by invasion of pathogen through the hematologic route. Mixed osteomyelitis caused by bacteria and fungi is rare, and to date, there have been no reports of mixed osteomyelitis with Staphylococcus spp. and Microsporum canis. CASE PRESENTATION This essay reports an atypical presentation of mixed osteomyelitis (Staphylococcus spp. and Microsporum canis) in a domestic cat. A 15-month-old female Persian cat was presented to a veterinary service; the main complaint was the appearance of a nodule in the mandibular ventral rostral region. A radiographic exam performed on the animal showed proliferative and osteolytic bone lesions. The patient was submitted to a biopsy for histopathological evaluation, along with bacterial and fungal cultures. Results showed mixed osteomyelitis by Staphylococcus spp. and Microsporum canis. Microbial Sensitivity Test was performed to choose a more suitable treatment. Two surgical procedures were executed to resect and curette the lesion, and treatments with anti-inflammatory, antibiotic, and antifungal drugs were established, showing a positive clinical evolution. After 8 months of treatment, the patient's owner moved to a different city, and the animal was seen by other veterinarians, who followed along with the same treatment. However, due to complications and a diminishing quality of life over 4 years of diagnosis, the patient was euthanized. CONCLUSION Given the above, mixed osteomyelitis is difficult to treat and can cause losses of life quality resulting death, especially in infections where M. canis is the agent causing the disease. Bacterial osteomyelitis is more frequently reported. But the lack of investigation of microorganisms other than bacteria, such as fungal cases, may imply in underdiagnosed cases. Treatment of osteomyelitis can be difficult considering the difficulties in isolating the pathological agent, resistance to the drug used, prolonged treatment time, and cost.
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Affiliation(s)
- Fernanda O Soares
- Hospital Veterinário Uniube, Universidade de Uberaba, Uberaba, Minas Gerais, Brazil
| | - Isabel R Rosado
- Hospital Veterinário Uniube, Universidade de Uberaba, Uberaba, Minas Gerais, Brazil
| | - Marcus V C Sousa
- Laboratório de Patologia Animal - PAVET, Universidade de Uberaba, Uberaba, Minas Gerais, Brazil
| | - Carolyne F Dumont
- Laboratório de Epidemiologia Molecular - LEPIMOL, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brazil.
- Programa de Pós-Graduação em Ciências Veterinárias, Universidade Federal de Uberlândia, Av. Ceará, s/n, Bloco 2D43, Uberlândia, CC 38402-018, Brazil.
| | - Joely F F Bittar
- Hospital Veterinário Uniube, Universidade de Uberaba, Uberaba, Minas Gerais, Brazil
| | - Ian Martin
- Hospital Veterinário Uniube, Universidade de Uberaba, Uberaba, Minas Gerais, Brazil
| | - Marcelo E Beletti
- Laboratório de Epidemiologia Molecular - LEPIMOL, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brazil
| | - Roberta T Melo
- Laboratório de Epidemiologia Molecular - LEPIMOL, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brazil
| | - Endrigo G L Alves
- Hospital Veterinário Uniube, Universidade de Uberaba, Uberaba, Minas Gerais, Brazil
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Oquendo PS, Silva ESM, Oquendo FMG, Cuervo‐Arango J, Beletti ME. The effect of priming and duration of oestradiol benzoate treatment before progesterone administration on embryo development and survival in anestrous recipient mares. Reprod Domest Anim 2022; 57:1474-1477. [PMID: 35903940 PMCID: PMC9804769 DOI: 10.1111/rda.14220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 07/27/2022] [Indexed: 01/09/2023]
Abstract
The effect of three different hormonal protocols to prepare anestrous recipient mares on embryo survival was evaluated. The first group consisted of only progesterone administration (NE) 4 days before embryo transfer, while the recipients from the other two groups received a single administration of 2.5 mg of oestradiol benzoate (SE) 2 days earlier or 8 mg of oestradiol split in increasing doses for 5 consecutive days (LE) ending 3 days before progesterone treatment. The likelihood of recovering an embryo 2 days after transfer was 46.1% (6/13), 62.5% (5/8) and 85.7% (6/7) for recipient mares from the no oestrus, short and long oestrous groups respectively (p = .09). In conclusion, the presence and duration of oestradiol treatment before progesterone administration tended to influence the embryo survival in anestrous recipients 2 days after transfer. The surviving embryos recovered from the three different groups of recipients did not show any difference in size and morphology.
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Affiliation(s)
- Pedro S. Oquendo
- Faculty of Veterinary MedicineFederal University of UberlandiaUberlandiaBrazil
| | - Elisa S. M. Silva
- Faculty of Veterinary MedicineFederal University of UberlandiaUberlandiaBrazil
| | | | - Juan Cuervo‐Arango
- Departamento de Medicina y Cirugía Animal, Facultad de VeterinariaUniversidad Cardenal Herrera‐CEU, CEU UniversitiesValenciaSpain
| | - Marcelo E. Beletti
- Institute of Biomedical SciencesFederal University of UberlandiaUberlandiaBrazil
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Silva ESM, Vaz IS, Rodrigues TS, Brandão FZ, Oquendo PS, Oquendo FMG, Beletti ME, Cuervo-Arango J. Artificial Long Estrus Protocols Administered Prior to Progesterone Increase Endometrial Uterocalin Expression in Anestrous Mares. J Equine Vet Sci 2021; 103:103669. [PMID: 34281646 DOI: 10.1016/j.jevs.2021.103669] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Revised: 05/20/2021] [Accepted: 05/21/2021] [Indexed: 11/19/2022]
Abstract
Uterocalin (P19) is a lipocalin protein that has binding activity for the provisioning of the embryo with lipids, including those essential for morphogenesis and pattern formation. Therefore, it is thought that P19 plays an important role in supporting the survival of the early embryo. Previous research has shown that the endometrium from acyclic mares expressed more P19 following a simulated long estrus: treatment of 8 mg of estradiol benzoate (EB) split over five consecutive days, followed by long-acting progesterone administration (LA-P4) 72 hours later, when compared to a single 2.5 mg EB treatment. The main objective of this study was to evaluate if a new long estrus protocol, with fewer EB administrations, also increases endometrial uterocalin expression. Fifteen mares were assigned to three groups: long estrus 5 administrations (LE5; a total of 8 mg of EB in increasing doses was given over five consecutive days, Day -7 to Day -3); long estrus 2 administrations (LE2; 3 and 5 mg EB were given on Day -7 and Day -4); and short estrus (SE; a single dose of 2.5 mg EB was administered on Day -2). All groups received LA P4 on day 0 (D0). Daily ultrasonography and blood collections were performed to assess uterine edema and estradiol and progesterone plasma concentrations, respectively. Endometrial biopsies were collected on Day 4 to evaluate P19 expression by RT-qPCR. There were no differences in P19 expression between groups LE2 and LE5. However, P19 expression was higher (P < .05) in the LE groups than in the SE group. Both LE protocols produced high uterine edema (score 2-3) for at least 6 days. There was no effect of group (LE2 or LE5) on overall estradiol and progesterone concentrations (P > .1). In conclusion, the two EB administrations protocol is more feasible for preparing acyclic recipient mares at field conditions. However, a positive effect of the LE protocols on embryo survival and viability in anestrous treated mares still needs to be confirmed.
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Affiliation(s)
- Elisa S M Silva
- School of Veterinary Medicine, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil.
| | - Isabela S Vaz
- School of Veterinary Medicine, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil
| | - Tamiris S Rodrigues
- School of Veterinary Medicine, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil
| | - Felipe Z Brandão
- School of Veterinary Medicine, Fluminense Federal University, Rio de Janeiro, Rio de Janeiro State, Brazil
| | - Pedro S Oquendo
- School of Veterinary Medicine, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil; Gallop Equine Veterinary Medicine, Uberlândia, Minas Gerais, Brazil
| | | | - Marcelo E Beletti
- School of Veterinary Medicine, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil
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Fagundes NS, Rezende AL, Alvarenga PB, Magalhães LQ, Santos RM, Headley SA, Silva MJB, Beletti ME, Saut JPE. Short communication: Proinflammatory gene expression relative to the collection technique of endometrial samples from cows with and without subclinical endometritis. J Dairy Sci 2019; 102:5511-5517. [PMID: 30981492 DOI: 10.3168/jds.2018-15212] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 02/18/2019] [Indexed: 12/27/2022]
Abstract
Uterine inflammation negatively affects reproductive performance and is an important cause of infertility and subfertility in dairy cows. Several studies have investigated the use of gene expression in endometrial samples collected by biopsy or cytology to evaluate the inflammatory response of the cow uterus. This study aimed to compare the expression of the CCL5, CXCL8, IL6, and IL1B genes in the bovine endometrium according to the site of sample collection [caruncular (C) or intercaruncular (IC)], the collection method (biopsy or cytology), and the category of inflammation based on endometrial cytology (zero, medium, or high) in subclinical endometritis. The reproductive tracts of dairy cows were collected from a slaughterhouse, and punch-biopsy samples of endometrial tissues were obtained from both regions (C and IC). Endometrial cells from these regions were collected with the cytobrush technique and then used for the analysis of mRNA expression by quantitative PCR. After counting polymorphonuclear cells (PMN) by endometrial cytology, 20 uteri with an ovary at stage I (d 1-4 of estrous cycle) were categorized into 3 groups. Uteri with 0% PMN (n = 10) were assigned to group zero, uteri with 5 to 15% PMN (n = 5) to group medium (12.2 ± 1.6% PMN), and uteri with >15% PMN (n = 5) to group high (53.8 ± 32.9% PMN). All data were analyzed with 2-way ANOVA with Bonferroni multiple comparison post test. The results from gene transcripts demonstrated that the region (C or IC) of the endometrial biopsy had no influence on any of the degrees of inflammatory reaction observed. However, gene expression was more elevated in the endometrium of cows with greater inflammation compared with those without inflammation (CCL5, CXCL8, IL6, IL1B) and those with medium inflammation (CCL5, IL6). Expression of the genes evaluated did not differ between the endometrium without inflammation and with medium inflammation. However, in the high inflammation group, all genes were comparatively more expressed in samples collected by cytology relative to those derived from biopsies for both anatomical regions. In conclusion, gene expression did not differ between the C and IC tissue. Samples collected from animals with greater inflammation had greater gene expression than those with zero or medium inflammation. In addition, cytology samples had greater gene expression than biopsy samples in the high inflammation group.
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Affiliation(s)
- Nadia S Fagundes
- Large Animal Health Laboratory, Federal University of Uberlândia, Uberlândia-Minas Gerais, 38400-902, Brazil; Laboratory of Biology of Reproduction, Instituto de Ciências Biomédicas, Federal University of Uberlândia, Uberlândia-Minas Gerais, 38400-902, Brazil
| | - Amanda L Rezende
- Large Animal Health Laboratory, Federal University of Uberlândia, Uberlândia-Minas Gerais, 38400-902, Brazil
| | - Paula B Alvarenga
- Large Animal Health Laboratory, Federal University of Uberlândia, Uberlândia-Minas Gerais, 38400-902, Brazil
| | - Layane Q Magalhães
- Large Animal Health Laboratory, Federal University of Uberlândia, Uberlândia-Minas Gerais, 38400-902, Brazil
| | - Ricarda M Santos
- Large Animal Health Laboratory, Federal University of Uberlândia, Uberlândia-Minas Gerais, 38400-902, Brazil
| | - Selwyn A Headley
- Laboratory of Animal Pathology, Department of Veterinary Preventive Medicine, Universidade Estadual de Londrina, Paraná, 86057-970, Brazil
| | - Marcelo J B Silva
- Laboratory of Biology of Reproduction, Instituto de Ciências Biomédicas, Federal University of Uberlândia, Uberlândia-Minas Gerais, 38400-902, Brazil
| | - Marcelo E Beletti
- Laboratory of Biology of Reproduction, Instituto de Ciências Biomédicas, Federal University of Uberlândia, Uberlândia-Minas Gerais, 38400-902, Brazil
| | - João P E Saut
- Large Animal Health Laboratory, Federal University of Uberlândia, Uberlândia-Minas Gerais, 38400-902, Brazil.
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Monteiro DA, Kalinin AL, Selistre-de-Araújo HS, Nogueira LAN, Beletti ME, Fernandes MN, Rantin FT. Cardioprotective effects of alternagin-C (ALT-C), a disintegrin-like protein from Rhinocerophis alternatus snake venom, on hypoxia-reoxygenation-induced injury in fish. Comp Biochem Physiol C Toxicol Pharmacol 2019; 215:67-75. [PMID: 30352307 DOI: 10.1016/j.cbpc.2018.10.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 10/10/2018] [Indexed: 10/28/2022]
Abstract
Alternagin-C (ALT-C) is a disintegrin-like peptide purified from Rhinocerophis alternatus snake venom with the property of inducing vascular endothelial growth factor (VEGF) expression, endothelial cell proliferation and migration, and angiogenesis. Therefore, this protein could be interesting as a new approach for ischemic heart diseases, an imbalance between myocardial oxygen supply and demand, leading to cardiac dysfunction. We investigated the effects of a single dose of alternagin-C (0.5 mg kg-1, via intra-arterial), after 7 days, on hypoxia/reoxygenation challenge in isolated ventricle strips and on morphological changes and density of blood vessels of the heart, using fish as an alternative experimental model. ALT-C treatment provided protection of cardiomyocytes against hypoxia/reoxygenation-induced negative inotropism. ALT-C also stimulated angiogenesis and improved excitation-contraction coupling during hypoxic conditions. Our results provide a new insight into a functional role of ALT-C against hypoxia/reoxygenation-induced cardiomyocyte injury pointing out to a potential therapeutic strategy for ischemia-related diseases.
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Affiliation(s)
- D A Monteiro
- Department of Physiological Sciences, Federal University of São Carlos, São Carlos, São Paulo, Brazil.
| | - A L Kalinin
- Department of Physiological Sciences, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - H S Selistre-de-Araújo
- Department of Physiological Sciences, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - L A N Nogueira
- Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - M E Beletti
- Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - M N Fernandes
- Department of Physiological Sciences, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - F T Rantin
- Department of Physiological Sciences, Federal University of São Carlos, São Carlos, São Paulo, Brazil
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Silva PLAPA, Goulart LR, Reis TFM, Mendonça EP, Melo RT, Penha VAS, Peres PABM, Hoepers PG, Beletti ME, Fonseca BB. Biofilm Formation in Different Salmonella Serotypes Isolated from Poultry. Curr Microbiol 2018; 76:124-129. [PMID: 30560366 DOI: 10.1007/s00284-018-1599-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 11/15/2018] [Indexed: 12/23/2022]
Abstract
Little is known about Salmonella biofilm assembly, making the prevention of the disease a challenge in the poultry production chain. The objective of the present study was then to evaluate biofilm formation from different serotypes of Salmonella spp. in both polystyrene plates and eggshells. Salmonella Gallinarum and S. Minnesota were both classified as producers of biofilms of moderate intensity. Interestingly, S. Gallinarum produces biofilm even though being a serotype without flagellum and not having the lux gene in its genome, suggesting that there might be other important structures and genes associated with biofilm formation. Regarding Enteritidis, Typhimurium, Typhimurium variant, and Heidelberg serotypes, despite having high counts, BFI (Biofilm Formation Index) showed low biofilm production, probably due to the scarcity of extracellular matrix produced by such strains. A turkey eggshell model was then used for S. Enteritidis and S. Heidelberg biofilm formation. The results from the microbial count and scanning electron microscopy showed that Salmonella serotypes were also able to generate biofilm in eggshells, suggesting the presence of biofilms in poultry producing farms, a main concern for the poultry production industry.
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Affiliation(s)
- Paula L A P A Silva
- Faculdade de Medicina Veterinária da Universidade Federal de Uberlândia, Uberlândia, Brazil
| | - Luiz Ricardo Goulart
- Instituto de Genética e Bioquímica da Universidade Federal de Uberlândia, Uberlândia, Brazil
| | - Thais F M Reis
- Faculdade de Medicina Veterinária da Universidade Federal de Uberlândia, Uberlândia, Brazil
| | - Eliane P Mendonça
- Faculdade de Medicina Veterinária da Universidade Federal de Uberlândia, Uberlândia, Brazil
| | - Roberta T Melo
- Faculdade de Medicina Veterinária da Universidade Federal de Uberlândia, Uberlândia, Brazil.
- Faculdade de Medicina Veterinária da Universidade de Uberaba, Uberaba, Brazil.
| | - Victor A S Penha
- Programa de Pós Graduação em Ecologia e Conservação da Universidade Federal do Paraná, Curitiba, PR, Brazil
| | - Phelipe A B M Peres
- Faculdade de Medicina Veterinária da Universidade Federal de Uberlândia, Uberlândia, Brazil
| | - Patrícia G Hoepers
- Faculdade de Medicina Veterinária da Universidade Federal de Uberlândia, Uberlândia, Brazil
- Animal Health Corporative Area, Foods S/A, Curitiba, PR, Brazil
| | - Marcelo E Beletti
- Faculdade de Medicina Veterinária da Universidade Federal de Uberlândia, Uberlândia, Brazil
| | - Belchiolina B Fonseca
- Faculdade de Medicina Veterinária da Universidade Federal de Uberlândia, Uberlândia, Brazil
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Ferreira BC, Ecco R, Couto RM, Coelho HE, Rossi DA, Beletti ME, Silva PL. Outbreak of cutaneous form of avian poxvirus disease in previously pox-vaccinated commercial turkeys. Pesq Vet Bras 2018. [DOI: 10.1590/1678-5150-pvb-4463] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
ABSTRACT: This study describes an outbreak of avian poxvirus disease in previously pox-vaccinated turkeys in Brazil. The turkeys had suggestive gross lesions of cutaneous avian poxvirus in the skin of the head and cervical area without changes in the flock mortality rates. In the slaughterhouse, 30 carcasses were removed from the slaughter line to collect tissue from cutaneous lesions for histological analyses and characterization of the virus. The virus was identified by conventional polymerase chain reaction (PCR) and subsequent gene sequencing. Acanthosis, hyperkeratosis, and hydropic degeneration were seen on skin histopathology. Eosinophilic intracytoplasmic inclusion bodies (Bollinger) on keratinocytes were observed in 46.6% of the samples. Avian poxvirus DNA was detected on PCR in 83.3% of the total samples. PCR associated with histopathology had 93.3% of positivity for avian poxvirus. In the phylogenetic study, samples show 100% matching suggesting that the outbreak occurred by a single viral strain and was different from those strains affecting other wild birds such as canaries and sparrows. A single mutation (Adenine for Guanine) was detected in our study’s strain and in the strains of turkey, chickens, and vaccine strains published in GenBank. Also, when the sequence strain of the present study and sequences from GenBank of canarypox and sparrowpox strains were aligned, a Thymine was found replacing the Adenine or Guanine. The in ovo vaccination method as single-use in turkeys of this study apparently did not provide adequate protection against avianpox disease, but additional vaccination administered by wing-web when turkeys were 45-60 days old in the new flocks controlled the disease. In the subsequent year, new cases of this disease were not found. It was not possible to confirm the source of the virus strain, but infection with a field strain derived from chickens is one possibility, considering the poultry farm population in the area and biosecurity aspects. For wide characterization of avipoxvirus and differentiation among strains, the complete sequence of the viral genome is required.
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Moura LR, Orpinelli SR, Sousa JH, Faleiro MB, Conceição EC, Sugita DM, Beletti ME, Moura VM. Ação do extrato etanólico da casca do pequi (Caryocar brasiliense) na cardiotoxicidade crônica induzida por doxorrubicina em ratos. Pesq Vet Bras 2017. [DOI: 10.1590/s0100-736x2017000700011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
RESUMO: A doxorrubicina (DOX) é um quimioterápico utilizado no tratamento de neoplasias malignas, porém possui a cardiotoxicidade como efeito colateral. O objetivo deste trabalho foi verificar quanto à ação do extrato etanólico da casca do pequi (Caryocar brasiliense) (EECP) por meio de avaliação morfológica (macroscópica, microscópica e ultramicroscópica), bem como avaliar a expressão de metaloproteinases (MMP2 e MMP9) e seus inibidores teciduais (TIMP1 e TIMP2) no miocárdio de ratos submetidos à cardiotoxicidade crônica pela DOX, tratados ou não com o EECP. O experimento teve duração de três meses e foram utilizados 30 ratos da raça Wistar, distribuídos em seis grupos de cinco animais. G1 e G2 receberam como pré-tratamento 300mg/kg e 600mg/kg de EECP, respectivamente, por gavagem, durante sete dias e mantiveram o tratamento durante os 21 dias de aplicação da DOX. Em G1, G2, G3, G4 e GC, a cardiotoxicidade foi induzida com aplicações semanais de 2mg/kg de DOX, via intraperitoneal, totalizando quatro aplicações (8mg/kg) e, nos ratos do grupo Sham (GS), foi aplicado 1ml de solução fisiológica. Os animais do G3 receberam diariamente 300mg/kg e os do G4 600mg/kg de EECP, por gavagem, durante os 21 dias de aplicação da DOX. Os do GC e GS receberam 1 ml de água, diariamente, também por gavagem. Após o término das aplicações, os animais foram mantidos por dois meses, totalizando três meses de experimento. A avaliação macroscópica foi realizada após 90 dias, momento em que foram colhidas amostras para análise em microscopia eletrônica, histopatologia e imunoistoquímica. Ao exame necroscópico foi observada ascite nos animais que receberam DOX. Houve baixo índice de mortalidade (3,33%), representado pela morte de um rato que desenvolveu pneumonia por falsa via. Não foi observada alteração no peso e nas medidas do coração dos ratos. Nas doses de 300 e 600mg/kg, o EECP atenuou a degeneração vacuolar miocítica. Na dose de 600mg/kg, o EECP reduziu a quantidade de células de Anitschkow e a fragmentação das miofibrilas. Não houve resultado significativo quanto à imunomarcação das MMP e, quanto a seus inibidores (TIMP), houve maior imunomarcação de TIMP2 no GC, grupo que recebeu apenas DOX. Concluiu-se que o extrato etanólico da casca do pequi (EECP) é eficiente em minimizar os efeitos da cardiotoxicidade crônica induzida pela DOX no miocárdio de ratos, considerando que nas doses de 300 e 600mg/kg o EECP atenua a degeneração vacuolar miocítica e, na dose de 600mg/kg, o EECP reduz a quantidade de células de Anitschkow e a fragmentação das miofibrilas.
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Affiliation(s)
- Léa R. Moura
- Centro Universitário UniEvangélica, Brasil; Universidade Federal de Goiás, Brazil
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Kipper BH, Trevizan JT, Carreira JT, Carvalho IR, Mingoti GZ, Beletti ME, Perri SHV, Franciscato DA, Pierucci JC, Koivisto MB. Sperm morphometry and chromatin condensation in Nelore bulls of different ages and their effects on IVF. Theriogenology 2016; 87:154-160. [PMID: 27712828 DOI: 10.1016/j.theriogenology.2016.08.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 08/16/2016] [Accepted: 08/17/2016] [Indexed: 10/21/2022]
Abstract
The aim of this study was to evaluate the chromatin packing and sperm head morphometry of cryopreserved semen of Nelore bulls (Bos taurus indicus) of different ages. Furthermore, the influence of the degree of chromatin compaction on in vitro embryo production (IVP) was investigated. Forty bulls were divided into three groups: young (1.8-2 years), adult (3.5-7 years), and senile (8-14.3 years). The ejaculates were frozen according to standards established by the Artificial Insemination Center located in the Southeast of Brazil. Toluidine blue staining was used for simultaneous evaluation of the sperm chromatin and sperm head morphometry. Chromomycin A3 (CMA3) was applied to analyze sperm protamination and IVP for embryonic development. Spermatozoa of young bulls presented higher values for area (A, pixels), perimeter (P, pixels), and width (W, pixels) compared to adults and senile (young: A = 1848.5 ± 119.79, P = 10.23 ± 0.29, and W = 1.95 ± 0.1; adults: A = 1672.9 ± 104.46, P = 9.86 ± 0.33, and W = 1.81 ± 0.06; senile: A = 1723.1 ± 124.41, P = 9.97 ± 0.33, and W = 1.83 ± 0.09; P < 0.0001) and showed higher protamination deficiency when analyzed by CMA3 (young: 1.57 ± 0.76; adults: 1.09 ± 0.63, and senile: 0.90 ± 0.59; P < 0.05). Likewise, variables of sperm head size (A, P, and W) and protamination assessed by CMA3 showed negative correlation with age and positive correlation with ellipticity, evaluated by toluidine blue method (P < 0.05). Sperm head area was larger in spermatozoa presenting chromatin instabilities than spermatozoa without chromatin alteration (P < 0.0001). There was no difference in IVP when using semen with larger or smaller portions of spermatozoa with chromatin instabilities, indicating that the proportion of sperm with abnormal chromatin compaction (4%-16.15%) did not interfere with early embryonic development. From our results, it can be concluded that sperm of young Nelore bulls have larger heads compared to adults and senile due to reduced protamine content when evaluated by CMA3 and higher proportion of major sperm defects assessed by differential interference contrast microscopy.
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Affiliation(s)
- B H Kipper
- Department of Medicine, Surgery and Animal Reproduction, Univ Estadual Paulista (UNESP), Araçatuba, São Paulo, Brazil
| | - J T Trevizan
- Department of Medicine, Surgery and Animal Reproduction, Univ Estadual Paulista (UNESP), Araçatuba, São Paulo, Brazil
| | - J T Carreira
- Department of Animal Reproduction and Obstetrics, University of Rio Preto (UNIRP), São José do Rio Preto, São Paulo, Brazil
| | - I R Carvalho
- Department of Medicine, Surgery and Animal Reproduction, Univ Estadual Paulista (UNESP), Araçatuba, São Paulo, Brazil
| | - G Z Mingoti
- Department of Support, Production and Animal Health, Univ Estadual Paulista (UNESP), Araçatuba, São Paulo, Brazil
| | - M E Beletti
- Laboratory of Histology, Federal University of Uberlândia (UFU), Uberlândia, Minas Gerais, Brazil
| | - S H V Perri
- Department of Support, Production and Animal Health, Univ Estadual Paulista (UNESP), Araçatuba, São Paulo, Brazil
| | - D A Franciscato
- Department of Medicine, Surgery and Animal Reproduction, Univ Estadual Paulista (UNESP), Araçatuba, São Paulo, Brazil
| | - J C Pierucci
- Department of Preventive Veterinarian Medicine and Animal Reproduction, Univ Estadual Paulista (UNESP), Araçatuba, São Paulo, Brazil
| | - M B Koivisto
- Department of Medicine, Surgery and Animal Reproduction, Univ Estadual Paulista (UNESP), Araçatuba, São Paulo, Brazil.
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Ferreira BC, Couto RM, Ecco R, Coelho HE, Rossi DA, Beletti ME, Silva PL. Proposal of a Standard for the Condemnation for Turkey Carcasses Due to Fowlpox. Rev Bras Cienc Avic 2016. [DOI: 10.1590/1806-9061225-230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | - RM Couto
- Universidade Federal de Minas Gerais, Brazil
| | - R Ecco
- Universidade Federal de Minas Gerais, Brazil
| | | | - DA Rossi
- Universidade Federal de Uberlândia, Brazil
| | - ME Beletti
- Universidade Federal de Uberlândia, Brazil
| | - PL Silva
- Universidade Federal de Uberlândia, Brazil
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11
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Lucio AC, Alves BG, Alves KA, Martins MC, Braga LS, Miglio L, Alves BG, Silva TH, Jacomini JO, Beletti ME. Selected sperm traits are simultaneously altered after scrotal heat stress and play specific roles in in vitro fertilization and embryonic development. Theriogenology 2016; 86:924-933. [PMID: 27087533 DOI: 10.1016/j.theriogenology.2016.03.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Revised: 03/10/2016] [Accepted: 03/10/2016] [Indexed: 12/18/2022]
Abstract
Improvements in the estimation of male fertility indicators require advances in laboratory tests for sperm assessment. The aims of the present work were (1) to apply a multivariate analysis to examine sperm set of alterations and interactions and (2) to evaluate the importance of sperm parameters on the outcome of standard IVF and embryonic development. Bulls (n = 3) were subjected to scrotal insulation, and ejaculates were collected before (preinsulation = Day 0) and through 56 days (Days 7, 14, 21, 28, 35, 42, 49, and 56) of the experimental period. Sperm head morphometry and chromatin variables were assessed by a computational image analysis, and IVF was performed. Scrotal heat stress induced alterations in all evaluated sperm head features, as well as cleavage and blastocyst rates. A principal component analysis revealed three main components (factors) that represented almost 89% of the cumulative variance. In addition, an association of factor scores with cleavage (factor 1) and blastocyst (factor 3) rates was observed. In conclusion, several sperm traits were simultaneously altered as a result of a thermal insult. These sperm traits likely play specific roles in IVF and embryonic development.
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Affiliation(s)
- Aline C Lucio
- Laboratory of Biology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Benner G Alves
- Laboratory of Biology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Kele A Alves
- Laboratory of Biology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Muller C Martins
- Laboratory of Biology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Lucas S Braga
- Laboratory of Biology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Luisa Miglio
- Laboratory of Biology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Bruna G Alves
- Laboratory of Biology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Thiago H Silva
- Laboratory of Biology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - José O Jacomini
- Laboratory of Biology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Marcelo E Beletti
- Laboratory of Biology of Reproduction, Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia, MG, Brazil.
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12
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Fonseca BB, Ferreira Júnior A, Santos JPD, Coelho LR, Rossi DA, Melo RT, Mendonça EP, Araújo TG, Alves RN, Beletti ME. Campylobacter Jejuni Increases Transcribed Il-1 B and Causes Morphometric Changes in the Ileal Enterocytes of Chickens. Rev Bras Cienc Avic 2016. [DOI: 10.1590/1516-635x1801063-068] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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13
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Fonseca BB, Rossi DA, Maia CA, Nalevaiko PC, Melo RT, Cuccato LP, Beletti ME. Characterization of the virulence, growth temperature and antibiotic resistance of the Campylobacter jejuni IAL 2383 strain isolated from humans. Braz J Microbiol 2014; 45:271-4. [PMID: 24948944 PMCID: PMC4059310 DOI: 10.1590/s1517-83822014000100039] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Accepted: 04/01/2013] [Indexed: 11/22/2022] Open
Abstract
The objective of this study was to characterize the C. jejuni IAL2383 strain isolated from humans in Brazil. Transcripts for the racR, dnaJ and ciaB genes were found and flaA, plda and cadF genes were present in the genome and bacteria was sensitive to most of the important antimicrobials used to treat humans. C. jejuni IAL2383 is a good experimental model to analyze the interactions with cells.
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Affiliation(s)
- B B Fonseca
- Faculdade de Medicina Veterinária Universidade de Uberaba UberabaMG Brazil
| | - D A Rossi
- Laboratório de Biotecnologia Animal Aplicada Universidade Federal de Uberlândia UberlândiaMG Brazil
| | - C A Maia
- Laboratório de Biotecnologia Animal Aplicada Universidade Federal de Uberlândia UberlândiaMG Brazil
| | - P C Nalevaiko
- Laboratório de Biotecnologia Animal Aplicada Universidade Federal de Uberlândia UberlândiaMG Brazil
| | - R T Melo
- Laboratório de Biotecnologia Animal Aplicada Universidade Federal de Uberlândia UberlândiaMG Brazil
| | - L P Cuccato
- Faculdade de Medicina Veterinária Universidade de Uberaba UberabaMG Brazil
| | - M E Beletti
- Centro de Microscopia Eletrônica Universidade Federal de Uberlândia UberlândiaMG Brazil
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14
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Alves BG, Alves KA, Lúcio AC, Martins MC, Silva TH, Alves BG, Braga LS, Silva TV, Viu MAO, Beletti ME, Jacomini JO, Santos RM, Gambarini ML. Ovarian activity and oocyte quality associated with the biochemical profile of serum and follicular fluid from Girolando dairy cows postpartum. Anim Reprod Sci 2014; 146:117-25. [PMID: 24674823 DOI: 10.1016/j.anireprosci.2014.02.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Revised: 02/26/2014] [Accepted: 02/28/2014] [Indexed: 12/01/2022]
Abstract
This study was designed to evaluate the influence of heat stress (HS) on the metabolic profile of serum and follicular fluid (FF), ovarian follicle development, and oocyte quality of Girolando dairy cows. Oocytes, blood, and FF (follicles ≥9mm) samples were obtained at 30, 45, 60, 75, and 90 days postpartum in the summer and winter seasons. During transvaginal follicular aspiration, rectal temperature (RT), body condition score (BCS), number of ovarian follicles, and quality of oocytes were recorded. The ambient air temperature (AT) and relative humidity (RH) were also recorded to calculate the temperature humidity index (THI). Glucose, total cholesterol (TC), triglycerides (TG), urea, sodium (Na), potassium (K), and calcium (Ca) concentrations were determined using serum and FF samples. The RT, THI, and BCS loss were greater (P<0.01) in the summer; however, glucose, Na, and K serum concentrations decreased in the same season (P<0.05). Degenerated oocytes were positively associated (P<0.05) with THI (r=0.14) and AT (r=0.13), and negatively associated with glucose (r=-0.12) and K (r=-0.11) serum concentrations. HS induces metabolic changes, which compromise the number of ovarian follicles and the follicular environment, thus resulting in morphologically damaged oocytes.
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Affiliation(s)
- Benner G Alves
- Center for Studies and Research in Animal Reproductive Biology, College of Veterinary and Animal Science, Federal University of Goiás, Goiânia, GO, 74001-970, Brazil.
| | - Kele A Alves
- Center for Studies and Research in Animal Reproductive Biology, College of Veterinary and Animal Science, Federal University of Goiás, Goiânia, GO, 74001-970, Brazil
| | - Aline C Lúcio
- Laboratory of Animal Reproduction, Faculty of Veterinary Medicine, Federal University of Uberlândia, Uberlândia, MG, 38400-902, Brazil
| | - Muller C Martins
- Laboratory of Animal Reproduction, Faculty of Veterinary Medicine, Federal University of Uberlândia, Uberlândia, MG, 38400-902, Brazil
| | - Thiago H Silva
- Laboratory of Animal Reproduction, Faculty of Veterinary Medicine, Federal University of Uberlândia, Uberlândia, MG, 38400-902, Brazil
| | - Bruna G Alves
- Laboratory of Animal Reproduction, Faculty of Veterinary Medicine, Federal University of Uberlândia, Uberlândia, MG, 38400-902, Brazil
| | - Lucas S Braga
- Laboratory of Animal Reproduction, Faculty of Veterinary Medicine, Federal University of Uberlândia, Uberlândia, MG, 38400-902, Brazil
| | - Thiago V Silva
- Center for Studies and Research in Animal Reproductive Biology, College of Veterinary and Animal Science, Federal University of Goiás, Goiânia, GO, 74001-970, Brazil
| | - Marco A O Viu
- Center for Studies and Research in Animal Reproductive Biology, College of Veterinary and Animal Science, Federal University of Goiás, Goiânia, GO, 74001-970, Brazil
| | - Marcelo E Beletti
- Laboratory of Animal Reproduction, Faculty of Veterinary Medicine, Federal University of Uberlândia, Uberlândia, MG, 38400-902, Brazil
| | - José O Jacomini
- Laboratory of Animal Reproduction, Faculty of Veterinary Medicine, Federal University of Uberlândia, Uberlândia, MG, 38400-902, Brazil
| | - Ricarda M Santos
- Laboratory of Animal Reproduction, Faculty of Veterinary Medicine, Federal University of Uberlândia, Uberlândia, MG, 38400-902, Brazil
| | - Maria L Gambarini
- Center for Studies and Research in Animal Reproductive Biology, College of Veterinary and Animal Science, Federal University of Goiás, Goiânia, GO, 74001-970, Brazil
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15
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Fonseca BB, Santos IL, Rossi DA, Melo RT, Araújo TG, Vieira CU, Mendonça EP, Beletti ME. Participation of the Cytoskeletal and Lysosomal Compartments in Campylobacter jejuni Invasion of Caco-2 cells, the Cellular Response by Morphometric Analysis and the Presence of Cytokine and Chemokine Transcripts. Indian J Microbiol 2014; 53:155-62. [PMID: 24426102 DOI: 10.1007/s12088-012-0324-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2012] [Accepted: 10/18/2012] [Indexed: 10/27/2022] Open
Abstract
This study aimed to evaluate the participation of actin and tubulin in the process of internalisation, the interaction of bacterial phagosomes with lysosomes, the morphometric changes and the expression of inflammatory cytokines in Caco-2 cells infected with Campylobacter jejuni. Both actin and tubulin participated in the process of internalisation. Inside the cells, lysosomes fuse with phagosomes, which may lead to bacterial death because after 2 h, the bacteria were not detected by Transmission electron microscopy (TEM). There is increased expression of TGF-β3 during the early stages, and IL-8 was expressed after 60 min p.i. This work showed that C. jejuni invades and causes major morphometric changes in epithelial cells. In response, the cells increase their expression of cytokines that can lead to inflammation. The mechanisms of invasion are dependent on actin and tubulin, and once internalised, lysosomes fuse with phagosomes.
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Affiliation(s)
- B B Fonseca
- Electronic Microscopy Centre at the Institute of Biomedical Sciences, Universidade Federal de Uberlândia, Uberlândia-MG, Brazil ; Applied Animal Biotechnology Laboratory at the School of Veterinary Science, Universidade Federal de Uberlândia, Uberlândia-MG, Brazil ; Instituto de Ciências Biomédicas, Rua Ceará, sem número, segundo andar, sala 23, bloco 2D, Campus Umuarama, CEP 38400-902 Uberlândia-MG, Brazil
| | - I L Santos
- Applied Animal Biotechnology Laboratory at the School of Veterinary Science, Universidade Federal de Uberlândia, Uberlândia-MG, Brazil
| | - D A Rossi
- Applied Animal Biotechnology Laboratory at the School of Veterinary Science, Universidade Federal de Uberlândia, Uberlândia-MG, Brazil
| | - R T Melo
- Applied Animal Biotechnology Laboratory at the School of Veterinary Science, Universidade Federal de Uberlândia, Uberlândia-MG, Brazil
| | - T G Araújo
- Genetics Laboratory of the Institute of Genetics and Biochemistry, The Universidade Federal de Uberlâdia, Uberlândia-MG, Brazil
| | - C U Vieira
- Genetics Laboratory of the Institute of Genetics and Biochemistry, The Universidade Federal de Uberlâdia, Uberlândia-MG, Brazil
| | - E P Mendonça
- Applied Animal Biotechnology Laboratory at the School of Veterinary Science, Universidade Federal de Uberlândia, Uberlândia-MG, Brazil
| | - M E Beletti
- Electronic Microscopy Centre at the Institute of Biomedical Sciences, Universidade Federal de Uberlândia, Uberlândia-MG, Brazil
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16
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Melo RT, Nalevaiko PC, Mendonça EP, Borges LW, Fonseca BB, Beletti ME, Rossi DA. Campylobacter jejuni strains isolated from chicken meat harbour several virulence factors and represent a potential risk to humans. Food Control 2013. [DOI: 10.1016/j.foodcont.2013.02.032] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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18
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de Morais NCG, Neves Mamede CC, Fonseca KC, de Queiroz MR, Gomes-Filho SA, Santos-Filho NA, Bordon KDCF, Beletti ME, Sampaio SV, Arantes EC, de Oliveira F. Isolation and characterization of moojenin, an acid-active, anticoagulant metalloproteinase from Bothrops moojeni venom. Toxicon 2012; 60:1251-8. [PMID: 22975266 DOI: 10.1016/j.toxicon.2012.08.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Revised: 08/28/2012] [Accepted: 08/29/2012] [Indexed: 12/28/2022]
Abstract
A fibrinogenolytic metalloproteinase from Bothrops moojeni venom, named moojenin, was purified by a combination of ion-exchange chromatography on DEAE-Sephacel and gel filtration on Sephacryl S-300. SDS-PAGE analysis indicated that moojenin consists of a single polypeptide chain and has a molecular mass about 45 kDa. Sequencing of moojenin by Edman degradation revealed the amino acid sequence LGPDIVSPPVCGNELLEVGEECDCGTPENCQNE, which showed strong identity with many other snake venom metalloproteinases (SVMPs). The enzyme cleaves the Aα-chain of fibrinogen first, followed by the Bβ-chain, and shows no effects on the γ-chain. Moojenin showed a coagulant activity on bovine plasma about 3.1 fold lower than crude venom. The fibrinogenolytic and coagulant activities of the moojenin were abolished by preincubation with EDTA, 1,10-phenanthroline and β-mercaptoethanol. Moojenin showed maximum activity at temperatures ranging from 30 to 40 °C and its optimal pH was 4.0. Its activity was completely lost at temperatures above 50 °C. Moojenin induced necrosis in liver and muscle, evidenced by morphological alterations, but did not cause histological alterations in mouse lungs, kidney or heart. Moojenin rendered the blood uncoagulatable when it was intraperitoneally administered into mice. This metalloproteinase may be of medical interest because of its anticoagulant activity.
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Affiliation(s)
- Nadia C G de Morais
- Instituto de Genética e Bioquímica, Universidade Federal de Uberlândia, Uberlândia-MG, Brazil
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19
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Oliveira LZ, Hossepian de Lima VF, Levenhagen MA, Santos RM, Assumpção TI, Jacomini JO, Andrade AF, Arruda RP, Beletti ME. Transmission electron microscopy for characterization of acrosomal damage after Percoll gradient centrifugation of cryopreserved bovine spermatozoa. J Vet Sci 2011; 12:267-72. [PMID: 21897100 PMCID: PMC3165156 DOI: 10.4142/jvs.2011.12.3.267] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The objective of this study was to characterize acrosomal ultrastructure following discontinuous Percoll gradient centrifugation of cryopreserved bovine sperm. Semen was collected from six bulls of different breeds and three ejaculates per bull were evaluated. Frozen semen samples were thawed and the acrosomal region of sperm cells was evaluated by transmission electron microscopy (TEM) before (n = 18) and after (n = 18) Percoll centrifugation. The evaluation of 20 sperm heads from each of the 36 samples analyzed ensured that a large number of cells were investigated. The data were subjected to analysis of variance at a level of significance of 5%. Percoll centrifugation reduced the percentage of sperm exhibiting normal acrosomes (from 61.77 to 30.24%), reduced the percentage of sperm presenting atypical acrosome reactions (from 28.38 to 4.84%) and increased the percentage of sperm exhibiting damage in the acrosome (from 6.14 to 64.26%). The percentage of sperm with typical acrosome reactions was not significantly different before (3.70%) and after (0.67%) centrifugation. TEM distinguished four different types of acrosomal status and enabled ultrastructural characterization of acrosomal injuries. The percentage of sperm exhibiting normal acrosomes decreased and damage in the acrosome was the most frequent acrosomal injury with the Percoll gradient centrifugation protocol utilized.
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Affiliation(s)
- Letícia Z Oliveira
- Department of Preventive Veterinary Medicine and Animal Reproduction, School of Agrarian Sciences and Veterinary Medicine, Universidade Estadual Paulista, Jaboticabal 14884-900, Brazil.
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20
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Fonseca BB, Beletti ME, Melo RT, Mendonça EP, Vieira CU, Levenhagen MA, Rossi DA. Transfer, viability and colonisation of Campylobacter jejuni in the chicken vitellus and in embryos. Br Poult Sci 2011; 52:279-86. [PMID: 21732872 DOI: 10.1080/00071668.2011.577056] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
1. The objective of this study was to evaluate the ability of Campylobacter jejuni to penetrate and colonise eggs from specific-pathogen-free (SPF) and heavy breeder hens, and to determine its effects on the viability of SPF embryos. 2. We detected C. jejuni in 10% of breeder hens and 20% of SPF eggs, which demonstrates the ability of the bacteria to go through the pores of eggs and contaminate the vitellus after 3 h of contact. These results indicate that there is a risk of contamination under commercial production conditions, where, after oviposition, there is contact between the egg and organic material such as faeces and blood. 3. We observed that in 80% of SPF eggs analysed, C. jejuni survived the 21-d incubation period. This positive result suggests that this microorganism was also responsible for early embryonic mortality. 4. The ability of C. jejuni to penetrate the eggs in this study suggests that serious problems may occur under natural field conditions, which may cause significant problems for producers.
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Affiliation(s)
- B B Fonseca
- Applied Animal Biotechnology Laboratory at the School of Veterinary Science, Universidade Federal de Uberlândia-MG, Av. Pará 1720, Uberlândia-MG, Brazil.
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21
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Godoy FB, Fonseca BB, Levenhagen MA, Franco MA, Melo RT, Beletti ME. Structural changes of fat tissue after nonaspirative ultrasonic hydrolipoclasy. J Cutan Aesthet Surg 2011; 4:105-10. [PMID: 21976901 PMCID: PMC3183714 DOI: 10.4103/0974-2077.85025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Background: Hydrolipoclasy is an alternative technique less invasive than liposuction. Hydrolipoclasy uses normal saline or hypotonic solution and ultrasound waves that act directly on local adiposity. In the literature there are few reports of morphostructural changes on adipose tissue. Materials and Methods: This study was aimed to evaluate the amount of fat cells injured immediately after treatment and after three days and also cell migration to the area treated using 8 pigs as experimental models, as well as cellular changes by transmission electron microscopy (TEM). Results: The Wilcoxon test was conducted, and a difference was found between the treated side and the corresponding control side on the number of viable cells. The treated side showed a smaller number of viable cells compared to the control side both immediately after treatment and 3 days later. Also occurring 3 days after treatment was the migration of lymphoid cells and fibroblasts, which shows the local inflammatory process and conjunctive neoformation. Soon after treatment there was fluid accumulation within adipocytes. Conclusions: The results shown in this paper demonstrate Ultrasonic Hydrolipoclasy as a viable alternative for the treatment of localized fat deposits without the side effects of traditional surgical procedures. Better results are expected when hypotonic solution is used, since it penetrates into the cell.
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Affiliation(s)
- Fúlvio B Godoy
- Medicine Department of University Presidente Antonio Carlos - UNIPAC
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22
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Queiroz MR, Mamede CC, Fonseca KC, Canabrava LCMN, França LV, Silva MC, Stanziola L, Beletti ME, Canabrava HAN, Oliveira F. Biological characterization of a myotoxin phosphoplipase A2 homologue purified from the venom of the snake Bothrops moojeni. J Venom Anim Toxins Incl Trop Dis 2011. [DOI: 10.1590/s1678-91992011000100007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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23
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Volpon JB, Mota FCD, Beletti ME. Low-intensity ultrasound application in distal radius metaphyseal bone defects of dogs. Ultrasound Med Biol 2010; 36:1849-1855. [PMID: 20888687 DOI: 10.1016/j.ultrasmedbio.2010.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2010] [Revised: 07/28/2010] [Accepted: 08/07/2010] [Indexed: 05/29/2023]
Abstract
We assessed the repair of transverse, 3-mm wide bone gaps created at the distal radius in 28 dogs that were randomly divided into two 14-animal groups; one was the control group and the other received a daily, 20-min application of low-intensity pulsed ultrasound for 100 days. Sequential radiographs, histomorphometrics, bone fluorescent histology and bone vascularity assessments found that all animals from both groups obtained a stage of hypertrophic-type nonunion with fibrocartilage tissue formation throughout the region of osteotomy. However, treated animals exhibited areas of endochondral ossification within the fibrocartilage region. There was no difference in type of vascularity or the newly formed bone process obtained by tetracycline labeling. Application of low-intensity ultrasound was not capable of significantly changing the reparative process and it may not be sufficiently powerful to overcome a combination of local deleterious effects on bone healing, created by gapping, excessive motion and periosteal resection.
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Affiliation(s)
- Jose B Volpon
- University of Sao Paulo School of Medicine, Ribeirao Preto, SP, Brazil.
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24
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Fonseca KC, Morais NCG, Queiroz MR, Silva MC, Gomes MS, Costa JO, Mamede CCN, Torres FS, Penha-Silva N, Beletti ME, Canabrava HAN, Oliveira F. Purification and biochemical characterization of Eumiliin from Euphorbia milii var. hislopii latex. Phytochemistry 2010; 71:708-715. [PMID: 20206951 DOI: 10.1016/j.phytochem.2010.02.009] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2008] [Revised: 01/15/2010] [Accepted: 02/09/2010] [Indexed: 05/28/2023]
Abstract
A protease, which we designate Eumiliin, was isolated from the latex of Euphorbia milii var. hislopii by a combination of ion-exchange chromatographic steps using DEAE-Sephacel and gel-filtration with Sephadex G-75. Eumiliin is a monomeric protein with an apparent molecular mass of 30 kDa by SDS-PAGE under reducing conditions and gave one main peak at 29,814 KDa in MALDI-TOF/TOF mass spectrometry. Eumiliin has caseinolytic and fibrinogenolytic activities, but no hemorrhagic or defibrinating activities. The enzyme readily hydrolyzes the Aalpha-chain of fibrinogen and, more slowly, the Bbeta-chain. Its fibrinogenolytic activity is inhibited by beta-mercaptoethanol and leupeptin. In contrast, EDTA and benzamidine did not affect the activity of Eumiliin. The caseinolytic activity of Eumiliin had a pH optimum of 8.0 and was stable in solution at up to 40 degrees C; activity was completely lost at >or=80 degrees C. Intraplantar injection of Eumiliin (1-25 microg/paw) caused a dose- and time-dependent hyperalgesia, which peaked 1-5h after enzyme injection. Intraplantar injection of Eumiliin (1-25 microg/paw) also caused an oedematogenic response that was maximal after 1h. Morphological analyses indicated that Eumiliin induced an intense myonecrosis, with visible leukocyte infiltrate and damaged muscle cells 24h after injection.
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Affiliation(s)
- K C Fonseca
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
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Costa JDO, Fonseca KC, Mamede CCN, Beletti ME, Santos-Filho NA, Soares AM, Arantes EC, Hirayama SNS, Selistre-de-Araújo HS, Fonseca F, Henrique-Silva F, Penha-Silva N, de Oliveira F. Bhalternin: Functional and structural characterization of a new thrombin-like enzyme from Bothrops alternatus snake venom. Toxicon 2010; 55:1365-77. [PMID: 20184912 DOI: 10.1016/j.toxicon.2010.02.014] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2009] [Revised: 02/07/2010] [Accepted: 02/16/2010] [Indexed: 11/17/2022]
Abstract
A serine protease from Bothrops alternatus snake venom was isolated using DEAE-Sephacel, Sephadex G-75 and Benzamidine-Sepharose column chromatography. The purified enzyme, named Bhalternin, ran as a single protein band on analytical polyacrylamide gel electrophoresis (SDS-PAGE) and showed molecular weights of 31,500 and 27,000 under reducing and non-reducing conditions, respectively. Its complete cDNA was obtained by RT-PCR and the 708bp codified for a mature protein of 236 amino acid residues. The multiple alignment of its deduced amino acid sequence showed a structural similarly with other serine proteases from snake venoms. Bhalternin was proteolytically active against bovine fibrinogen and albumin as substrates. When Bhalternin and bovine fibrinogen were incubated at 37 degrees C, at a ratio of 1:100 (w/w), the enzyme cleaved preferentially the Aalpha-chain, apparently not degrading the Bbeta and gamma-chains. Stability tests showed that the intervals of optimum temperature and pH for the fibrinogenolytic activity were 30-40 degrees C and 7.0-8.0, respectively. Also, the inhibitory effects of benzamidine on the fibrinogenolytic activity of Bhalternin indicate that it is a serine protease. This enzyme caused morphological alterations in heart, liver, lung and muscle of mice and it was found to cause blood clotting in vitro and defibrinogenation when intraperitoneally administered to mice, suggesting it to be a thrombin-like enzyme. Therefore, Bhaltenin may be of interest as a therapeutic agent in the treatment and prevention of thrombotic disorders.
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Affiliation(s)
- Júnia de O Costa
- Instituto de Genética e Bioquímica, Universidade Federal de Uberlândia, 38400-902 Uberlândia-MG, Brazil.
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26
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Assis RCL, Luns FD, Beletti ME, Assis RL, Nasser NM, Faria ESM, Cury MC. Histomorphometry and macroscopic intestinal lesions in broilers infected with Eimeria acervulina. Vet Parasitol 2009; 168:185-9. [PMID: 20080348 DOI: 10.1016/j.vetpar.2009.11.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2009] [Revised: 11/04/2009] [Accepted: 11/25/2009] [Indexed: 11/16/2022]
Abstract
This study aimed at measuring intestinal villi and assessing the intestinal absorptive area in broilers infected with Eimeria acervulina under different treatments to control coccidiosis. The experiment was divided into two stages, carried out in successive housings, raised in the same environment (or aviary). In the first stage, on 25 May 2008, fifty 12-day-old birds were orally inoculated with 3 x 10(3) oocysts of E. acervulina. In the second stage, on July 2008, other 50 birds were allocated on litter contaminated by the feces of birds on the first housing (natural infection by oocysts present in the reused litter). The experiment was arranged in a complete randomized design with five treatments and three replicates of 10 chicks per treatment. Broiler chicks were housed at 1 day of age and autopsies were performed at 21 days of age. Three 2-cm-long segments of the duodenum were excised from each bird and fixed in 10% buffered formalin. A total of 30 slides were prepared for each treatment, totaling 150 evaluated histological sections using H&E staining. Villus morphology was carried out by the HL Image 97 software. The intestinal absorptive area was calculated and macroscopic lesions were classified according to standard lesion scores. Results showed that intestinal villus measurements and absorptive area are directly affected by E. acervulina and that there is direct and positive correlation between the macro and microscopic findings observed in intestinal coccidiosis. E. acervulina causes shortening of villi and reduction in the intestinal absorptive area, affecting broiler growth. The prevention method of litter fermentation during the interval between housings and oral administration of Diclazuril can reduce the severity of intestinal lesions by E. acervulina in broilers impairing oocyst virulence or viability.
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Affiliation(s)
- R C L Assis
- Federal University of Uberlandia - Institute of Biomedical Sciences - Laboratory of Parasitology, Av. Pará, 1720 - Umuarama Campus, Minas Gerais, Brazil
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27
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Pereira CG, Silva ALN, de Castilhos P, Mastrantonio EC, Souza RA, Romão RP, Rezende RJ, Pena JDO, Beletti ME, Souza MA. Different isolates from Leishmania braziliensis complex induce distinct histopathological features in a murine model of infection. Vet Parasitol 2009; 165:231-40. [PMID: 19656631 DOI: 10.1016/j.vetpar.2009.07.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2008] [Revised: 07/03/2009] [Accepted: 07/13/2009] [Indexed: 12/01/2022]
Abstract
The aim of this study was to evaluate the histopathological features in tissues of mice infected by human isolates (I, II, and III) or the reference M2903 strain of Leishmania braziliensis complex. BALB/c and C57Bl/6 mice were infected in the hind footpad with 10(6) stationary-phase promastigotes of L. braziliensis complex. The evolution of lesions was observed for 10 weeks and the animals were then euthanized and liver, spleen and popliteal lymph nodes were collected. Tissues were stained with hematoxylin and eosin and analyzed by immunohistochemistry assay. Increased thickness of infected footpads was observed in all animals, lesions were nodular and non-ulcerated. Mice infected with isolate I presented inflammatory infiltrates consisting predominantly of mononuclear cells in all tissues examined, and also a great number of megakaryocytes, compared with other isolates. Infection with isolate II led to an infected footpad enlargement not seen in other isolates. In addition, mononuclear infiltrates in the liver and hemosiderin in spleen were noted. Conversely, mice infected with either isolate III or M2903 strain only showed an increased number of megakaryocytes in spleen. All tissues examined had detectable amastigote forms of Leishmania by immunohistochemistry in all groups. Taking together, our results showed an unforeseen behavior of different isolates of L. braziliensis complex that led to diverse pathological findings.
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Affiliation(s)
- Cristiano G Pereira
- Laboratório de Biologia Molecular, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Brazil
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28
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Abstract
We describe here a computational morphology-based approach to the investigation of possible causes of chromatin alterations in sperm. A comprehensive set of state-of-the-art and geometric measures are computationally extracted from toluidine blue stained images and analyzed to infer the possible processes leading to normal and abnormal chromatin formation while seeking a possible taxonomy of chromatin alterations and their influence on sperm head morphology. Using this methodology, we have identified higher chromatin fragility at some specific points of the sperm head. Despite the lack of correlation between morphologies of sperm head and chromatin structure, four main morphological types of chromatin alterations in bull spermatozoa have been identified and their possible causes discussed.
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Affiliation(s)
- M E Beletti
- Institute of Biomedical Science-Federal University of Uberlândia, Uberlandia, Minas Gerais, Brazil.
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29
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Rodrigues RM, Silva NM, Gonçalves ALR, Cardoso CR, Alves R, Gonçalves FA, Beletti ME, Ueta MT, Silva JS, Costa-Cruz JM. Major histocompatibility complex (MHC) class II but not MHC class I molecules are required for efficient control of Strongyloides venezuelensis infection in mice. Immunology 2008; 128:e432-41. [PMID: 19191916 DOI: 10.1111/j.1365-2567.2008.02995.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Strongyloides stercoralis is an intestinal nematode capable of chronic, persistent infection and hyperinfection of the host; this can lead to dissemination, mainly in immunosuppressive states, in which the infection can become severe and result in the death of the host. In this study, we investigated the immune response against Strongyloides venezuelensis infection in major histocompatibility complex (MHC) class I or class II deficient mice. We found that MHC II(-/-) animals were more susceptible to S. venezuelensis infection as a result of the presence of an elevated number of eggs in the faeces and a delay in the elimination of adult worms compared with wild-type (WT) and MHC I(-/-) mice. Histopathological analysis revealed that MHC II(-/-) mice had a mild inflammatory infiltration in the small intestine with a reduction in tissue eosinophilia. These mice also presented a significantly lower frequency of eosinophils and mononuclear cells in the blood, together with reduced T helper type 2 (Th2) cytokines in small intestine homogenates and sera compared with WT and MHC I(-/-) animals. Additionally, levels of parasite-specific immunoglobulin M (IgM), IgA, IgE, total IgG and IgG1 were also significantly reduced in the sera of MHC II(-/-) infected mice, while a non-significant increase in the level of IgG2a was found in comparison to WT or MHC I(-/-) infected mice. Together, these data demonstrate that expression of MHC class II but not class I molecules is required to induce a predominantly Th2 response and to achieve efficient control of S. venezuelensis infection in mice.
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Affiliation(s)
- Rosângela M Rodrigues
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brazil
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30
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Santos-Filho NA, Silveira LB, Oliveira CZ, Bernardes CP, Menaldo DL, Fuly AL, Arantes EC, Sampaio SV, Mamede CC, Beletti ME, de Oliveira F, Soares AM. A new acidic myotoxic, anti-platelet and prostaglandin I2 inductor phospholipase A2 isolated from Bothrops moojeni snake venom. Toxicon 2008; 52:908-17. [DOI: 10.1016/j.toxicon.2008.08.020] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2008] [Revised: 08/07/2008] [Accepted: 08/08/2008] [Indexed: 10/21/2022]
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31
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Gonçalves ALR, Rodrigues RM, Silva NM, Gonçalves FA, Cardoso CR, Beletti ME, Ueta MT, Silva JS, Costa-Cruz JM. Immunolocalization and pathological alterations following Strongyloides venezuelensis infection in the lungs and the intestine of MHC class I or II deficient mice. Vet Parasitol 2008; 158:319-28. [PMID: 18977600 DOI: 10.1016/j.vetpar.2008.09.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2007] [Revised: 09/04/2008] [Accepted: 09/08/2008] [Indexed: 11/15/2022]
Abstract
The present study, investigated the mechanisms involved in the immune responses of Major Histocompatibility Complex class I or class II knockout mice, following Strongyloides venezuelensis infection. Wild-type C57BL/6 (WT), MHC II(-/-) and MHC I(-/-) mice were individually inoculated with 3000 larvae (L3) of S. venezuelensis and sacrificed on days 1, 3, 5, 8, 13 and 21 post-infection (p.i.). Samples of blood, lungs and small intestines were collected. The tissue samples were stained with hematoxylin-eosin for the pathological analysis. The presence of the parasite was demonstrated by immunoperoxidase analysis. MHC II(-/-) mice presented a significantly higher number of adult worms recovered from the small intestine on day 5p.i. and presented elevated numbers of eggs in the feces. The infection by S. venezuelensis was completely eliminated 13 days after infection in WT as well as in MHC I(-/-) mice. In MHC II(-/-) mice, eggs and adult worms were still found on day 21 p.i., however, there was a significant reduction in their numbers. In the lung, the parasite was observed in MHC I(-/-) on day 1 p.i. and in MHC II(-/-) mice on days 1 and 5 p.i. In the small intestine of WT mice, a larger number of parasites were observed on day 8 p.i. and their absence was observed after day 13 p.i. Through immunohistochemistry analysis, the parasite was detected in the duodenum of WT on days 5 and 8 p.i., and in knockout mice on days 5, 8 and 13 p.i.; as well as in posterior portions of the small intestine in MHC I(-/-) and MHC II(-/-) on day 13 p.i., a finding which was not observed in WT mice. We concluded that immunohistochemistry analysis contributed to a more adequate understanding of the parasite localization in immunodeficient hosts and that the findings aid in the interpretation of immunopathogenesis in Strongyloides infection.
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MESH Headings
- Animals
- Genes, MHC Class I/genetics
- Genes, MHC Class II/genetics
- Intestinal Diseases, Parasitic/immunology
- Intestinal Diseases, Parasitic/parasitology
- Intestinal Diseases, Parasitic/pathology
- Intestines/pathology
- Lung/pathology
- Lung Diseases, Parasitic/immunology
- Lung Diseases, Parasitic/parasitology
- Lung Diseases, Parasitic/pathology
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Strongyloides
- Strongyloidiasis/immunology
- Strongyloidiasis/parasitology
- Strongyloidiasis/pathology
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Affiliation(s)
- A L R Gonçalves
- Laboratório de Parasitologia, Universidade Federal de Uberlândia, Av. Pará 1720, 38700-902 Uberlândia, Minas Gerais, Brazil
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32
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Travençolo BAN, Martínez Debat C, Beletti ME, Sotelo Silveira JR, Ehrlich R, Costa LDF. A new method for quantifying three-dimensional interactions between biological structures. J Anat 2007; 210:221-31. [PMID: 17261141 PMCID: PMC2100275 DOI: 10.1111/j.1469-7580.2006.00685.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
In this paper we examine a new distance-based method for identifying and characterizing possible interactions between biological structures and objects, with respect to the initial developmental stages of Echinococcus granulosus. By adopting the surface of the foramen as the distance reference, several interesting results have been identified, including the fact that the cell nuclei tend to be organized with respect to the foramen surface as well as the stability of the spatial distribution of these nuclei along the development stages.
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Affiliation(s)
- Bruno A N Travençolo
- Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP, Brazil
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33
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Fonseca BB, Soncini RA, Vieira FL, Siqueira MS, Guimarães AR, Beletti ME, Rossi DA. Campylobacter sp in organs and meconium of day-old broiler chicks derived from naturally infected breeder hens. Rev Bras Cienc Avic 2006. [DOI: 10.1590/s1516-635x2006000400010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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34
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Rodrigues FH, Afonso-Cardoso SR, Gomes MAB, Beletti ME, Rocha A, Guimarães AHB, Candeloro I, de Souza MA. Effect of imidocarb and levamisole on the experimental infection of BALB/c mice by Leishmania (Leishmania) amazonensis. Vet Parasitol 2006; 139:37-46. [PMID: 16647821 DOI: 10.1016/j.vetpar.2006.02.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2005] [Revised: 01/30/2006] [Accepted: 02/23/2006] [Indexed: 11/22/2022]
Abstract
The adverse effects from using currently available drugs for the treatment of leishmaniasis have motivated the search for new therapeutical agents. The aim of this work was to evaluate the effect of imidocarb and levamisole on the treatment of BALB/c mice experimentally infected by Leishmania (Leishmania) amazonensis. BALB/c mice were infected with 10(6) promastigotes of L. (L.) amazonensis (IFLA/BR/67/PH8) and, starting on day 51, mice were treated subcutaneously with imidocarb (IMD, 34 mg/kg), imidocarb plus levamisole (IMD+LVS, 34 and 12 mg/kg, respectively), only levamisole (LVS, 12 mg/kg) or without treatment (control). Lesion size and swelling were weekly monitored for 10 weeks after the beginning of the treatment. On day 121 post-infection, serum levels of specific IgG from infected mice were evaluated, as well as histopathological and morphometric alterations in the footpad, lymph nodes and spleen of these animals. The data obtained in this study demonstrated that, when compared to controls, mice treated with IMD had lower levels of IgG anti-L. (L.) amazonensis (34.45%), smaller vacuolar area in macrophages (3.75%), lower number of megakaryocytes in spleen (63.19%) and lower parasite burden in the footpad (30.2%). Thus, the evaluated parameters suggest the use of imidocarb as a potential drug in the treatment of tegumentary leishmaniasis.
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Affiliation(s)
- Flávio H Rodrigues
- Instituto de Ciências Biomédicas da Universidade Federal de Uberlândia, av. Pará, 1720, 38.400-902 Uberlândia, Brazil
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