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1.
Arq. bras. med. vet. zootec. (Online) ; 73(4): 916-922, Jul.-Aug. 2021. ilus
Artigo em Inglês | LILACS, VETINDEX | ID: biblio-1285267

RESUMO

This study characterized the clinical, radiological, ultrasound, and necroscopic findings of a case of Arnold-Chiari type II malformation in a Gir breed calf from Brazil. The animal was hospitalized at sixty days of age, in permanent sternal recumbency, cutaneous appendix at the 4th lumbar vertebra and kyphoscoliosis of the caudal and lumbosacral thoracic spine. Radiographic examination of the spine and skull revealed spina bifida and suspected occipital hypoplasia. Upon examination of myelography with an injection of lumbar and atlantooccipital contrast, it was possible to visualize the meningocele at the 4th lumbar vertebra region and findings at the rhombencephalon level of increased regional pressure with failure to fill the contrast in the posterior fossa, in the presence of clear demarcation of the circumvolutions of the cerebral cortex and the subarachnoid space of the cervical spinal cord. Ultrasonographic examination of the cerebellum showed an insinuation of the cerebellar worm through the foramen magnum. The animal did not show changes in complete blood count, biochemical series, and cerebrospinal fluid and was negative for Pestivirus. There was a worsening of the clinical conditions and the animal died. This malformation of unknown etiology must be studied as a differential diagnosis of the nervous system disorders.(AU)


Este estudo caracterizou os achados clínicos, radiológicos, ultrassonográficos e necroscópicos de um caso de malformação de Arnold-Chiari tipo II em uma bezerra Gir no Brasil. O animal foi hospilatizado aos 60 dias de idade, apresentando decúbito esternal permanente, apêndice cutâneo na altura da quarta vértebra lombar e cifoescoliose da coluna vertebral torácica caudal e lombossacra. Ao exame radiográfico da coluna e do crânio, foram observadas espinha bífida e suspeita de hipoplasia occipital. Ao exame de mielografia com injeção de contraste lombar e atlanto-occipital, foi possivel visualizar a meningocele na altura da quarta vértebra lombar e achados em nível rombencefálico de aumento da pressão regional com falha de preenchimento do contraste na fossa posterior, na presença de nítida demarcação das circunvoluções do córtex cerebral e do espaço subaracnoide da medula espinhal cervical. Ao exame ultrassonográfico do cerebelo, foi observada insinuação do verme cerebelar através do forame magno. O animal não apresentou alterações em hemograma completo, série bioquímica e fluido cérebro-espinhal e foi negativo para Pestivirus. Houve uma piora do quadro clínico e o animal morreu. Essa malformação de etiologia desconhecida deve ser estudada como um diagnóstico diferencial.(AU)


Assuntos
Animais , Feminino , Bovinos , Malformação de Arnold-Chiari/veterinária , Malformação de Arnold-Chiari/diagnóstico por imagem , Vermis Cerebelar/diagnóstico por imagem , Anormalidades Congênitas/veterinária , Doenças do Sistema Nervoso/diagnóstico por imagem
2.
Braz. j. biol ; 80(1): 112-114, Feb. 2020. tab, graf
Artigo em Inglês | LILACS | ID: biblio-1089275

RESUMO

Abstract The tegu (Salvator merianae) is the largest lizard found in Brazil and has a wide distribution, occurring in several biomes. The presence of fungi on reptilian eggs initially occurs on infertile eggs, which leads to a subsequent infection in fertile eggs, causing damage and death of embryos. The objective of this study was to identify the fungi that caused lesions in the eggs of tegu in captivity. Swabs were collected on infected and healthy eggshells, in an embryo that died and the substrate of the incubation box. Samples were submitted to saboraund dextrose agar. A total of 93.3% of positive samples were obtained for the fungi Fusarium (11/14), Trichoderma (1/15), Penicilium (1/15), Mucor (1/15), and yeasts of the genus Trichosporon. Therefore, Fusarium was the main agent that caused the lesion and death of embryos in the eggs of the tegu lizard. Sanitary control methods may be taken to avoid fungal infections in the eggs.


Resumo O teiú (Salvator merianae) é o maior lagarto encontrado no Brasil e possui ampla distribuição, sendo encontrado em vários biomas. A presença de fungos em ovos de répteis ocorre inicialmente em ovos inférteis, o que leva à uma infecção posterior em ovos férteis, gerando danos e morte dos embriões. O objetivo deste estudo foi o de identificar os fungos geradores de lesões em ovos de teiú em cativeiro. Foram coletados suabes na casca de ovos infectados e sadios, além de um embrião que veio a óbito, e do substrato presente na caixa de incubação. As amostras foram submetidas ao cultivo em ágar Saboraund dextrose. Um total de 93,3% de amostras foram positivas para os fungos Fusarium (11/15), Trichoderma (1/15), Penicillium (1/15), Mucor (1/15) e leveduras do gênero Trichosporon (3/15). Logo, Fusarium foi o principal agente causador das lesões e morte de embriões nos ovos do lagarto teiú. Métodos de controle sanitário podem ser adotados para evitar infecção fúngicas nos ovos.


Assuntos
Animais , Lagartos , Micoses , Brasil
3.
Behav Brain Res ; 383: 112487, 2020 04 06.
Artigo em Inglês | MEDLINE | ID: mdl-31987932

RESUMO

Despite recent advances, current antidepressants have considerable limitations: late onset of action and the high profile of refractoriness. Biomedical research with natural products has gained growing interest in the last years, and had provide useful candidates for new antidepressants. Riparins are a group of natural alkamides obtained from Aniba riparia, which had marked neuroactive effects, mainly as antidepressant and antinociceptive agents. We made modifications of the basic structure of riparins, originating a synthetic alkamide, also known as riparin IV (RipIV). RipIV demonstrated a superior analgesic effect than its congeners and a marked antidepressant-like effect. However, the basic mechanism for the central effects of RipIV remains unknown. Here, we aimed to investigate the participation of monoaminergic neurotransmission targets in the antidepressant-like effects of RipIV. To do this, we applied a combined approach of experimental (classical pharmacology and neurochemistry) and computer-aided techniques. Our results demonstrated that RipIV presented antidepressant- and anxiolytic-like effects without modifying locomotion and motor coordination of mice. Also, RipIV increased brain monoamines and their metabolite levels. At the higher dose (100 mg/kg), RipIV increased serotonin concentrations in all studied brain areas, while at the lower one (50 mg/kg), it increased mainly dopamine and noradrenaline levels. When tested with selective receptor antagonists, RipIV antidepressant effect showed dependence of the activation of multiple targets, including D1 and D2 dopamine receptors, 5-HT2A/2, 5-HT3 receptors and α2 adrenergic receptors. Molecular docking demonstrated favorable binding conformation and affinity of RipIV to monoamine oxidase B (MAO-B), serotonin transporter (SERT), α1 receptor, D2 receptor, dopamine transporter (DAT) and at some extent GABA-A receptor. RipIV also presented a computationally predicted favorable pharmacokinetic profile. Therefore, this study demonstrated the involvement of monoaminergic targets in the mechanism of RipIV antidepressant-like action, and provide evidence of it as a promising new antidepressant.


Assuntos
Ansiolíticos/farmacologia , Antidepressivos/farmacologia , Monoaminoxidase/efeitos dos fármacos , Receptores Adrenérgicos alfa 2/efeitos dos fármacos , Receptores Dopaminérgicos/efeitos dos fármacos , Receptores de Serotonina/efeitos dos fármacos , Tiramina/análogos & derivados , Animais , Encéfalo/efeitos dos fármacos , Encéfalo/metabolismo , Bupropiona/farmacologia , Dopamina/metabolismo , Proteínas da Membrana Plasmática de Transporte de Dopamina/efeitos dos fármacos , Proteínas da Membrana Plasmática de Transporte de Dopamina/metabolismo , Fluoxetina/farmacologia , Imipramina/farmacologia , Camundongos , Simulação de Acoplamento Molecular , Monoaminoxidase/metabolismo , Norepinefrina/metabolismo , Receptor 5-HT2A de Serotonina/efeitos dos fármacos , Receptor 5-HT2A de Serotonina/metabolismo , Receptores Adrenérgicos alfa 2/metabolismo , Receptores Dopaminérgicos/metabolismo , Receptores de Dopamina D1 , Receptores de Dopamina D2 , Receptores de GABA-A/efeitos dos fármacos , Receptores de GABA-A/metabolismo , Receptores de Serotonina/metabolismo , Receptores 5-HT2 de Serotonina/efeitos dos fármacos , Receptores 5-HT2 de Serotonina/metabolismo , Receptores 5-HT3 de Serotonina/efeitos dos fármacos , Receptores 5-HT3 de Serotonina/metabolismo , Serotonina/metabolismo , Proteínas da Membrana Plasmática de Transporte de Serotonina/efeitos dos fármacos , Proteínas da Membrana Plasmática de Transporte de Serotonina/metabolismo , Tiramina/farmacologia
4.
Braz J Biol ; 80(1): 112-114, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31166370

RESUMO

The tegu (Salvator merianae) is the largest lizard found in Brazil and has a wide distribution, occurring in several biomes. The presence of fungi on reptilian eggs initially occurs on infertile eggs, which leads to a subsequent infection in fertile eggs, causing damage and death of embryos. The objective of this study was to identify the fungi that caused lesions in the eggs of tegu in captivity. Swabs were collected on infected and healthy eggshells, in an embryo that died and the substrate of the incubation box. Samples were submitted to saboraund dextrose agar. A total of 93.3% of positive samples were obtained for the fungi Fusarium (11/14), Trichoderma (1/15), Penicilium (1/15), Mucor (1/15), and yeasts of the genus Trichosporon. Therefore, Fusarium was the main agent that caused the lesion and death of embryos in the eggs of the tegu lizard. Sanitary control methods may be taken to avoid fungal infections in the eggs.


Assuntos
Lagartos , Micoses , Animais , Brasil
6.
ACS Macro Lett ; 7(1): 31-36, 2018 Jan 16.
Artigo em Inglês | MEDLINE | ID: mdl-35610934

RESUMO

Solid-state cooling based on i-caloric effects has shown to be a promising alternative to the conventional refrigeration devices. Only very recently, the research on barocaloric materials is receiving a deal of attention due to the demonstration of giant barocaloric effects in shape-memory alloys. Regarding polymers, there is still a lack of literature, despite their high caloric potential. Thus, we present here giant barocaloric effects in natural rubber, a low-cost and environmental friendly elastomer polymer. The maximum values of entropy and temperature changes are larger than those previously reported for any promising barocaloric material. Moreover, the huge normalized temperature change and refrigerant capacity exhibited by natural rubber confirm its high potential for cooling applications. We also verify a relevant dependence of the barocaloric effect on the glass transition in natural rubber. Our findings suggest that commercial refrigeration devices based on barocaloric effects from elastomer polymers can be envisaged in the near future.

8.
Org Biomol Chem ; 15(42): 8923-8928, 2017 Oct 31.
Artigo em Inglês | MEDLINE | ID: mdl-29038808

RESUMO

Trastuzumab (Herceptin®) is an FDA-approved therapeutic antibody currently employed in the treatment of metastatic stages of breast cancer. Herein, we propose a simple, fast and cost-effective methodology to conjugate trastuzumab with 22-mer 5' thiol-modified oligonucleotides using a bifunctional crosslinker. The conjugates were successfully characterized by MALDI-ToF MS and SDS-PAGE, obviating the need for enzymatic digestion and difficult chromatographic separations. Furthermore, ELISA was performed to ensure that trastuzumab activity is not affected by oligonucleotide conjugation.


Assuntos
Reagentes de Ligações Cruzadas/síntese química , Oligonucleotídeos/química , Trastuzumab/química , Reagentes de Ligações Cruzadas/química , Eletroforese em Gel de Poliacrilamida , Ensaio de Imunoadsorção Enzimática , Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz
9.
Rev Sci Instrum ; 88(4): 046103, 2017 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-28456218

RESUMO

Barocaloric materials have shown to be promising alternatives to the conventional vapor-compression refrigeration technologies. Nevertheless, barocaloric effect (σb-CE) has not been extensively examined for many classes of materials up to now. Aiming at fulfilling this gap, the present paper describes the development of a high-pressure experimental setup for measuring the σb-CE in polymers. The design allows simultaneous measurements of temperature, pressure, and strain during the barocaloric cycle. The system proved to be fully functional through basic experiments using natural rubber. Samples exhibited large temperature variations associated with the σb-CE. Strain-temperature curves were also obtained, which could allow indirect measurements of the isothermal entropy change.

10.
Parasite Immunol ; 39(1)2017 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-27593711

RESUMO

In this study, a recombinant chimeric protein (RCP), which was composed of specific CD4+ and CD8+ T-cell epitopes to murine and human haplotypes, was evaluated as an immunogen against Leishmania infantum infection in a murine model. BALB/c mice received saline were immunized with saponin or with RCP with or without an adjuvant. The results showed that RCP/saponin-vaccinated mice presented significantly higher levels of antileishmanial IFN-γ, IL-12 and GM-CSF before and after challenge, which were associated with the reduction of IL-4 and IL-10 mediated responses. These animals showed significant reductions in the parasite burden in all evaluated organs, when both limiting dilution and quantitative real-time PCR techniques were used. In addition, the protected animals presented higher levels of parasite-specific nitrite, as well as the presence of anti-Leishmania IgG2a isotype antibodies. In conclusion, the RCP/saponin vaccine could be considered as a prophylactic alternative to prevent against VL.


Assuntos
Linfócitos T CD4-Positivos/imunologia , Linfócitos T CD8-Positivos/imunologia , Epitopos de Linfócito T/imunologia , Leishmania infantum , Vacinas contra Leishmaniose/imunologia , Leishmaniose Visceral/prevenção & controle , Proteínas Recombinantes de Fusão/imunologia , Adjuvantes Imunológicos/administração & dosagem , Animais , Feminino , Fator Estimulador de Colônias de Granulócitos e Macrófagos/metabolismo , Humanos , Imunogenicidade da Vacina , Interleucina-10/metabolismo , Interleucina-12/metabolismo , Interleucina-4/metabolismo , Leishmania infantum/imunologia , Vacinas contra Leishmaniose/genética , Camundongos , Camundongos Endogâmicos BALB C , Proteínas Recombinantes de Fusão/genética , Saponinas/imunologia , Vacinas Sintéticas/imunologia
11.
Artigo em Inglês | LILACS-Express | LILACS, VETINDEX | ID: biblio-1467286

RESUMO

Abstract The tegu (Salvator merianae) is the largest lizard found in Brazil and has a wide distribution, occurring in several biomes. The presence of fungi on reptilian eggs initially occurs on infertile eggs, which leads to a subsequent infection in fertile eggs, causing damage and death of embryos. The objective of this study was to identify the fungi that caused lesions in the eggs of tegu in captivity. Swabs were collected on infected and healthy eggshells, in an embryo that died and the substrate of the incubation box. Samples were submitted to saboraund dextrose agar. A total of 93.3% of positive samples were obtained for the fungi Fusarium (11/14), Trichoderma (1/15), Penicilium (1/15), Mucor (1/15), and yeasts of the genus Trichosporon. Therefore, Fusarium was the main agent that caused the lesion and death of embryos in the eggs of the tegu lizard. Sanitary control methods may be taken to avoid fungal infections in the eggs.


Resumo O teiú (Salvator merianae) é o maior lagarto encontrado no Brasil e possui ampla distribuição, sendo encontrado em vários biomas. A presença de fungos em ovos de répteis ocorre inicialmente em ovos inférteis, o que leva à uma infecção posterior em ovos férteis, gerando danos e morte dos embriões. O objetivo deste estudo foi o de identificar os fungos geradores de lesões em ovos de teiú em cativeiro. Foram coletados suabes na casca de ovos infectados e sadios, além de um embrião que veio a óbito, e do substrato presente na caixa de incubação. As amostras foram submetidas ao cultivo em ágar Saboraund dextrose. Um total de 93,3% de amostras foram positivas para os fungos Fusarium (11/15), Trichoderma (1/15), Penicillium (1/15), Mucor (1/15) e leveduras do gênero Trichosporon (3/15). Logo, Fusarium foi o principal agente causador das lesões e morte de embriões nos ovos do lagarto teiú. Métodos de controle sanitário podem ser adotados para evitar infecção fúngicas nos ovos.

12.
J Synchrotron Radiat ; 23(Pt 6): 1501-1506, 2016 11 01.
Artigo em Inglês | MEDLINE | ID: mdl-27787257

RESUMO

Various upgrades have been completed at the XRD1 beamline at the Brazilian synchrotron light source (LNLS). The upgrades are comprehensive, with changes to both hardware and software, now allowing users of the beamline to conduct X-ray powder diffraction experiments with faster data acquisition times and improved quality. The main beamline parameters and the results obtained for different standards are presented, showing the beamline ability of performing high-quality experiments in transmission geometry. XRD1 operates in the 5.5-14 keV range and has a photon flux of 7.8 × 109 photons s-1 (with 100 mA) at 12 keV, which is one of the typical working energies. At 8 keV (the other typical working energy) the photon flux at the sample position is 3.4 × 1010 photons s-1 and the energy resolution ΔE/E = 3 × 10-4.

13.
J Phys Condens Matter ; 28(47): 476002, 2016 11 30.
Artigo em Inglês | MEDLINE | ID: mdl-27633814

RESUMO

Fe2MnSi fails to follow the Slater-Pauling rule. This phenomenon is thought to originate from either: (i) an antiferromagnetic arrangement of Mn ions at low temperature and/or (ii) chemical disorder. An important insight on this issue could be achieved by considering Fe2MnSi1-x Ga x compounds, thoroughly studied here by means of magnetization, neutron diffraction and density functional calculations (DFT). Our results indicate that chemical disorder (and not the antiferromagnetic arrangement) is responsible for the deviation of the Slater-Pauling rule on Fe2MnSi-based Heusler alloys. Furthermore, evidences suggest that Ga substitution into Si site favors the Fe/Mn disorder, further enhancing the observed deviation.

14.
Arq. bras. med. vet. zootec ; 68(1): 82-86, jan.-fev. 2016. graf
Artigo em Português | LILACS | ID: lil-771868

RESUMO

O hemangiossarcoma ocular na espécie equina é um tumor maligno, raro e agressivo, de origem vascular endotelial. No presente trabalho, descreve-se um caso de hemangiossarcoma ocular em uma égua de 10 anos que apresentava secreção serossanguinolenta advinda de uma massa, acometendo a conjuntiva bulbar e a terceira pálpebra do olho direito. O diagnóstico foi realizado com base na avaliação histopatológica e na imuno-histoquímica. Foi realizada a enucleação, assim como a completa excisão cirúrgica do tecido acometido, não sendo observada, após seis meses da terapia, a recidiva ou a metástase da lesão.


Equine ocular hemangiosarcoma is a rare and aggressive malignant tumor of vascular endothelial origin. We describe a case of ocular hemangiosarcoma in a 10-year-old mare with serosanguineous secretion arising from a mass involving the bulbar conjunctiva and third eyelid of the right eye. The diagnosis was based on histopathological evaluation and immunohistochemistry. Enucleation was performed as complete surgical excision of the affected tissue, with no recurrence or metastasis of the lesion being observed after six months of.


Assuntos
Animais , Enucleação Ocular/veterinária , Hemangiossarcoma/veterinária , Neoplasias Vasculares/diagnóstico , Neoplasias Vasculares/veterinária , Doenças Palpebrais/veterinária , Lesões do Sistema Vascular/veterinária , Metástase Neoplásica
15.
J Comp Pathol ; 153(4): 206-11, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26604083

RESUMO

Sheep-associated malignant catarrhal fever (SA-MCF) is an important infectious disease of ruminants worldwide that is caused by ovine herpesvirus 2 (OvHV-2). OvHV-2 is transmitted predominantly by contact between infected and susceptible hosts, while the documentation of vertical transmission is rare. This report presents the pathological and molecular findings associated with transplacental transmission of OvHV-2 in cattle. Two Girolanda cows with corneal oedema, lethargy, mucopurulent nasal discharge and ulcerative stomatitis died spontaneously; one of these was pregnant with a 4-month-old fetus. Significant pathological findings included widespread lymphoplasmacytic necrotizing vasculitis and lymphoplasmacytic accumulations in several organs of both cows and the fetus. A polymerase chain reaction that targeted the tegument protein gene of OvHV-2 amplified viral DNA from the brain of the pregnant cow and her fetus, as well as from the kidney of the pregnant cow. The pathological findings observed in the cow and her fetus, together with the presence of OvHV-2 DNA in tissues of these animals, are suggestive of transplacental transmission of OvHV-2 in SA-MCF in cattle.


Assuntos
Transmissão Vertical de Doenças Infecciosas , Febre Catarral Maligna/transmissão , Doenças dos Ovinos , Animais , Bovinos , Feminino , Herpesviridae , Reação em Cadeia da Polimerase , Gravidez , Ovinos
16.
Br J Nutr ; 113(8): 1301-7, 2015 Apr 28.
Artigo em Inglês | MEDLINE | ID: mdl-25812604

RESUMO

High meat intake has been related to chronic diseases such as cancer and CVD. One hypothesis is that heterocyclic amines (HCA), which are formed during the cooking process of meat, can generate reactive species. These compounds can cause oxidation of lipids, proteins and DNA, resulting in oxidative stress, cell damage and loss of biological function. This association has been seen in vitro; however, it remains unclear in vivo. The aim of the present study was to investigate the association between oxidative stress and HCA intake, and oxidative stress and meat intake. Data were from the Health Survey for Sao Paulo--ISA-Capital (561 adult and elderly). Food intake was estimated by one 24-h dietary recall (24HR) complemented by a detailed FFQ with preferences of cooking methods and level of doneness for meat. HCA intake was estimated linking the meat from the 24HR to a database of HCA. Oxidative stress was estimated by malondialdehyde (MDA) concentration in the plasma, after derivatisation with thiobarbituric acid and quantification by HPLC/diode array. Analyses were performed using multivariate logistic regressions adjusted for smoking, sex, age, BMI, skin colour, energy intake, fruit and vegetable intake, and physical activity. A positive association between HCA intake and MDA concentration (OR 1·17; 95% CI 1·01, 1·38) was observed, showing that HCA from meat may contribute to increase oxidative stress, and may consequently increase the risk of chronic diseases.


Assuntos
Aminas/química , Dieta , Carne/análise , Estresse Oxidativo , Adolescente , Adulto , Idoso , Antropometria , Índice de Massa Corporal , Brasil , Cromatografia Líquida de Alta Pressão , Estudos Transversais , Comportamento Alimentar , Feminino , Humanos , Masculino , Malondialdeído/sangue , Pessoa de Meia-Idade , Análise Multivariada , Espécies Reativas de Oxigênio , Substâncias Reativas com Ácido Tiobarbitúrico , Adulto Jovem
17.
Arq. bras. med. vet. zootec ; 66(4): 1033-1038, 08/2014. graf
Artigo em Português | LILACS | ID: lil-722568

RESUMO

A terapia celular vem sendo utilizada com resultados promissores no tratamento da tendinite equina, entretanto ainda existem dúvidas quanto à persistência e ao comportamento dessas células quando implantadas no local da lesão, e quanto à sua migração para outros focos inflamatórios. O objetivo deste estudo foi avaliar a marcação das células-tronco mesenquimais (CTMs) com nanocristal antes e após o implante em lesões tendíneas experimentais do tendão flexor digital superficial (TFDS) de equinos, bem como observar a possibilidade de migração das CTMs marcadas para outro foco de lesão, o membro contralateral do mesmo animal. Para isso, foi realizada a indução de lesão experimental no TFDS em ambos os membros torácicos de cinco equinos e, após sete dias, foram implantadas as CTMs autólogas marcadas com o nanocristal Qtracker 655 em um dos membros dos animais. Após sete dias do implante, foi realizada a biópsia tendínea para posterior avaliação histopatológica, utilizando-se microscopia com fluorescência. Também foi realizado o teste de viabilidade celular antes e após a incubação com o nanocristal. As CTMs marcadas e injetadas no tecido tendíneo mantiveram sua fluorescência sete dias após seu implante, e não ocorreu migração para o membro contralateral. O uso do nanocristal para a marcação das CTMs derivadas da medula óssea equina mostrou-se efetivo pelo fato de essa nanopartícula não ter alterado a viabilidade celular e por ela ter permanecido ativa durante o período implantado...


Cell therapy has been used with promising results in the treatment of equine tendinitis. However, there are still doubts about the persistence and behavior of these cells implanted in the injured tissue and their migration to other inflamed sites. The aim of this study was to evaluate the labeling of mesenchymal stem cells (MSCs) with nanocrystals before and after implantation in experimental tendinitis of the superficial digital flexor tendon (SDFT) of horses, observing the migration possibility of MSCs marked to another lesion, performed on the contralateral limb of the same animal. An experimental lesion was induced in SDFT in both forelimbs of five horses, and after seven days autologous MSCs labeled with Qtracker(r) 655 were implanted in one member of the animals. Tendon biopsy was performed for subsequent histopathological evaluation using fluorescence microscopy seven days after the implant. Cell viability test was also performed before and after incubation with the cell labeling kit. MSCs labeled and injected into the tendon tissue maintained their fluorescence seven days after their implantation and there was no migration to the contralateral limb. The use of nanocrystals for labeling MSCs was effective because it does not alter cell viability and remains active during the experimental period...


Assuntos
Animais , Medula Óssea , Movimento Celular , Cavalos/lesões , Nanopartículas , Células-Tronco , Tendinopatia/induzido quimicamente , Tendinopatia/terapia , Biópsia , Microscopia de Fluorescência
18.
Equine Vet J ; 46(5): 635-8, 2014 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-23998777

RESUMO

REASONS FOR PERFORMING STUDY: Mesenchymal stem cells (MSCs) have been used to treat equine tendonitis with promising results; however, little is known about the potential migration of these cells. OBJECTIVES: To assess the possible migration of MSCs from an implantation site in the superficial digital flexor tendon (SDFT) to a lesion in the SDFT of the contralateral limb. STUDY DESIGN: In vivo experimental study. METHODS: Adipose-derived MSCs were isolated from 4 healthy horses. Lesions were induced in the SDFTs of both forelimbs, followed by intralesional implantation of autologous adipose-derived MSCs labelled with nanocrystals into one of the limbs. Flow cytometry of the peripheral blood mononuclear cells and fluorescence microscopy of biopsies of the SDFT lesions were used to search for the labelled cells. RESULTS: Labelled cells were detected among the peripheral blood mononuclear cells in all animals, but labelled cells were present only in the SDFTs that were treated with the intralesional implants. CONCLUSION: Nanocrystals were a valuable in vivo marker of MSCs to be used for tendonitis treatment. Although migration of MSCs to the bloodstream was observed, it was not possible to identify the labelled cells in the untreated tendons.


Assuntos
Movimento Celular/fisiologia , Doenças dos Cavalos/terapia , Transplante de Células-Tronco Mesenquimais/veterinária , Células-Tronco Mesenquimais/fisiologia , Tendinopatia/veterinária , Tecido Adiposo/citologia , Animais , Células Cultivadas , Feminino , Cavalos , Masculino , Células-Tronco Mesenquimais/citologia , Tendinopatia/terapia
19.
Arq. bras. med. vet. zootec ; 65(4): 939-945, Aug. 2013. ilus, graf, tab
Artigo em Inglês | LILACS | ID: lil-684445

RESUMO

Stem cell therapy has shown promising results in tendinitis and osteoarthritis in equine medicine. The purpose of this work was to characterize the adipose-derived mesenchymal stem cells (AdMSCs) in horses through (1) the assessment of the capacity of progenitor cells to perform adipogenic, osteogenic and chondrogenic differentiation; and (2) flow cytometry analysis using the stemness related markers: CD44, CD90, CD105 and MHC Class II. Five mixed-breed horses, aged 2-4 years-old were used to collect adipose tissue from the base of the tail. After isolation and culture of AdMSCs, immunophenotypic characterization was performed through flow cytometry. There was a high expression of CD44, CD90 and CD105, and no expression of MHC Class II markers. The tri-lineage differentiation was confirmed by specific staining: adipogenic (Oil Red O), osteogenic (Alizarin Red), and chondrogenic (Alcian Blue). The equine AdMSCs are a promising type of adult progenitor cell for tissue engineering in veterinary medicine.


O uso de células tronco tem demonstrado resultados promissores na terapia da tendinite e osteoartrite na medicina equina. O objetivo deste trabalho foi caracterizar as células tronco mesenquimais derivadas do tecido adiposo (AdCTMs) em cavalos através da (1) avaliação da capacidade das células progenitoras para realizar a diferenciação adipogênica, osteogênica e condrogênica; e (2) através da análise por citometria de fluxo, utilizando os marcadores stemness relacionados: CD44, CD90, CD105 e MHC de Classe II. Cinco cavalos sem raça definida, de 2 a 4 anos de idade foram utilizados para a coleta do tecido adiposo da base da cauda. Após o isolamento e cultivo das AdCTMs, a caracterização imunofenotípica foi realizada pela citometria de fluxo. Houve alta expressão dos marcadores CD44, CD90 e CD105, e não houve expressão do MHC Classe II. A diferenciação foi confirmada pela coloração específica: adipogênica (Oil Red O), osteogênico (Alizarin Red), e condrogênico (Alcian Blue). As AdCTMs são um tipo promissor de células progenitoras adulta para a engenharia tecidual na medicina veterinária.


Assuntos
Animais , Células-Tronco/citologia , Imunofenotipagem , Tecido Adiposo/fisiologia , Cavalos/classificação
20.
Food Sci Technol Int ; 18(3): 281-90, 2012 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-22701061

RESUMO

Polyunsaturated fatty acids play an important role in human nutrition, being associated with several health benefits. The analyzed vegetables, in spite of its low fat content, lower than 2%, present a high proportion of polyunsaturated fatty acids of n-3, n-6 and n-9 series, such as α-linolenic, linoleic and oleic acids, respectively. Wild edible plants contain in general a good balance of n-6 and n-3 fatty acids. The present study tries to contribute to the preservation and valorization of traditional food resources, studying the fatty acids profile of 20 wild vegetables by gas-liquid chromatography with flame ionization detection. Results show that species in which leaves are predominant in their edible parts have in general the highest polyunsaturated fatty acid/saturated fatty acid ratios: Rumex pulcher (5.44), Cichorium intybus (5.14) and Papaver rhoeas (5.00). Due to the low n-6/n-3 ratios of the majority of the samples, they can be considered interesting sources of n-3 fatty acids, especially those with higher total fat amount, such as Bryonia dioica, Chondrilla juncea or Montia fontana, with the highest contents of α-linolenic acid (67.78, 56.27 and 47.65%, respectively). The wild asparaguses of Asparagus acutifolius and Tamus communis stand out for their linoleic acid content (42.29 and 42.45%, respectively). All these features reinforce the interest of including wild plants in diet, as an alternative to the variety of vegetables normally used.


Assuntos
Ácidos Graxos Insaturados/química , Verduras/química , Análise de Alimentos , Valor Nutritivo , Folhas de Planta/química , Caules de Planta/química , Espanha
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