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Pesquisa : B01.050.150.900.649.313.992.419 [Categoria DeCS]
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  1 / 16 MEDLINE  
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[PMID]:27718209
[Au] Autor:Escribano BM; Medina-Fernández FJ; Aguilar-Luque M; Agüera E; Feijoo M; Garcia-Maceira FI; Lillo R; Vieyra-Reyes P; Giraldo AI; Luque E; Drucker-Colín R; Túnez I
[Ad] Endereço:Departamento de Biologia Celular, Fisiologia e Inmunologia, Facultad de Veterinaria, Universidad de Cordoba, Cordoba, Spain.
[Ti] Título:Lipopolysaccharide Binding Protein and Oxidative Stress in a Multiple Sclerosis Model.
[So] Source:Neurotherapeutics;14(1):199-211, 2017 Jan.
[Is] ISSN:1878-7479
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Recent findings in experimental autoimmune encephalomyelitis (EAE) suggest that altering certain bacterial populations present in the gut may lead to a proinflammatory condition, that could result in the development of multiple sclerosis (MS). Also, Reactive Oxygen Species seem to be involved in the course of MS. In this study, it has been aimed to relate all these variables starting from an analysis of the lipopolysaccharide (LPS) and LPS-binding protein (LBP) with the determination of parameters related to oxidative stress in the blood, brain and spinal cord. For this purpose, samples obtained from EAE rats and relapsing-remitting (RRMS) MS patients were used. In addition, EAE rats were treated with Natalizumab, N-acetyl-cysteine and dimethyl fumarate. Natalizumab was also employed in RRMS. The results of this study revealed an improvement in the clinical symptoms of the EAE and MS with the treatments, as well as a reduction in the oxidative stress parameters and in LBP. Correlations between the clinical variables of the disease, i.e. oxidative damage and LBP, were established. Although the conclusions of this research are indeed relevant, further investigation would be necessary to establish the intrinsic mechanisms of the MS-oxidative stress-microbiota relationship.
[Mh] Termos MeSH primário: Proteínas da Fase Aguda/metabolismo
Proteínas de Transporte/metabolismo
Glicoproteínas de Membrana/metabolismo
Esclerose Múltipla/metabolismo
Estresse Oxidativo
[Mh] Termos MeSH secundário: Acetilcisteína/administração & dosagem
Adulto
Animais
Encéfalo/efeitos dos fármacos
Encéfalo/metabolismo
Contagem de Células
Dasyproctidae
Fumarato de Dimetilo/administração & dosagem
Encefalomielite Autoimune Experimental/metabolismo
Feminino
Seres Humanos
Peroxidação de Lipídeos
Lipopolissacarídeos/metabolismo
Masculino
Meia-Idade
Natalizumab/administração & dosagem
Neurônios/efeitos dos fármacos
Ratos
Medula Espinal/efeitos dos fármacos
Medula Espinal/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Acute-Phase Proteins); 0 (Carrier Proteins); 0 (Lipopolysaccharides); 0 (Membrane Glycoproteins); 0 (Natalizumab); 0 (lipopolysaccharide-binding protein); FO2303MNI2 (Dimethyl Fumarate); WYQ7N0BPYC (Acetylcysteine)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170925
[Lr] Data última revisão:
170925
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161009
[St] Status:MEDLINE
[do] DOI:10.1007/s13311-016-0480-0


  2 / 16 MEDLINE  
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[PMID]:27687997
[Au] Autor:Sousa F; Pessoa GT; Moura LS; Araújo JR; Rodrigues R; Barbosa M; Diniz AN; Souza AB; Silva EG; Lucena LU; Sanches MP; Silva-Filho OF; Guerra PC; Sousa JM; Neves WC; Alves FR
[Ad] Endereço:Faculty of Medical Science, State University of Piauí, Teresina, PI, Brazil.
[Ti] Título:Organogenesis and foetal haemodynamics during the normal gestation of healthy black-rumped agoutis (Dasyprocta prymnolopha, Wagler, 1831) bred in captivity.
[So] Source:Reprod Domest Anim;52(1):60-66, 2017 Feb.
[Is] ISSN:1439-0531
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:The objective of this study was to define the patterns of organogenesis and foetal haemodynamics during the normal gestation of healthy agoutis (Dasyprocta prymnolopha) kept in captivity. Thirty pregnant agoutis that ranged in size from small to medium and weighed between 2.5 and 3 kg underwent B-mode and Doppler ultrasonography for the biometric evaluation of the foetal organs. The foetal aortic blood flow proved to be predominantly systolic, and the measured flow velocity was 78.89 ± 2.95 cm/s, with a maximum pressure gradient of 2.12 ± 0.27 mmHg. The liver was characterized by its large volume, occupying the entire cranial aspect of the abdominal cavity, and it was associated cranially with the diaphragm and caudally with the stomach. The flow velocity in the portal vein was estimated to equal 12.17 ± 2.37 cm/s, with a resistivity index of 0.82 ± 0.05. The gallbladder was centrally located and protruded cranially towards the diaphragm. The spleen was visualized as an elongated structure with tapered cranial and caudal extremities, and the foetal kidneys were visualized bilaterally in the retroperitoneal region, with the right kidney positioned slightly more cranially than the left. The morphological characterization and hemodynamic analysis of the foetal organs of black-rumped agoutis via B-mode and Doppler ultrasonography allow determination of the vascular network and of reference values for the blood flow required for perfusing the anatomical elements essential for maintaining the viability of foetuses at different gestational ages.
[Mh] Termos MeSH primário: Dasyproctidae/embriologia
Feto/irrigação sanguínea
Feto/diagnóstico por imagem
Organogênese
[Mh] Termos MeSH secundário: Estruturas Animais/diagnóstico por imagem
Estruturas Animais/crescimento & desenvolvimento
Animais
Cruzamento
Feminino
Idade Gestacional
Hemodinâmica
Gravidez
Ultrassonografia Doppler
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170523
[Lr] Data última revisão:
170523
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161001
[St] Status:MEDLINE
[do] DOI:10.1111/rda.12803


  3 / 16 MEDLINE  
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[PMID]:28080916
[Au] Autor:Suepaul R; Charles R; Dziva F
[Ti] Título:AEROBIC MICROFLORA AND ENDOPARASITES OF FRESHLY SHOT WILD AGOUTI (DASYPROCTA LEPORINA) IN TRINIDAD, WEST INDIES.
[So] Source:J Zoo Wildl Med;47(4):1044-1048, 2016 Dec.
[Is] ISSN:1042-7260
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The agouti ( Dasyprocta leporina ) is a New World wild rodent hunted for its meat in Trinidad and other Latin American countries. Studies on agouti under captive conditions have yielded some data on health-related aspects, but relatively very little is known about their wild counterparts. The environment of the agouti can influence the microflora and parasites harbored by the animals, which may contain zoonotic pathogens. Here, the microflora found on the nasal mucosa and sections of the intestinal tract and endoparasites of freshly shot agouti from various areas of Trinidad are described. Staphylococcus epidermidis , S. intermedius , Bacillus spp., Enterobacter spp. and Escherichia coli comprised the majority of bacteria isolated from the nasal mucosa whereas Escherichia coli , Streptococcus viridans, Bacillus spp. and Klebsiella pneumoniae were predominant in all sections of the intestinal tract. The fungi Aspergillus fumigatus , Aspergillus spp., Candida spp., Penicillium spp., and Mucor spp. were only isolated from the nasal cavity but not in any section of the intestinal tract. The parasites Strongyloides spp., Ascaridia spp., a hookworm, a trematode, and Trichuris spp. were detected at variable frequencies in each of the sections of the intestines (small intestine, large intestine, caecum), whereas Eimeria spp. were found in all sections (76.9%, 10 of 13 agoutis). These wild agoutis were presumably healthy at the time of death and represent animals that hunters may encounter. Some of the detected pathogens and parasites have the potential to cause opportunistic infections or infestations, especially in immune-compromised hosts.
[Mh] Termos MeSH primário: Bactérias Aeróbias/isolamento & purificação
Dasyproctidae/microbiologia
Dasyproctidae/parasitologia
Eimeria/isolamento & purificação
Fungos/isolamento & purificação
Nematoides/isolamento & purificação
[Mh] Termos MeSH secundário: Animais
Animais Selvagens
Bactérias Aeróbias/classificação
Infecções Bacterianas/epidemiologia
Infecções Bacterianas/microbiologia
Infecções Bacterianas/veterinária
Coccidiose/epidemiologia
Coccidiose/veterinária
Fungos/classificação
Micoses/epidemiologia
Micoses/microbiologia
Micoses/veterinária
Nematoides/classificação
Infecções por Nematoides/epidemiologia
Infecções por Nematoides/veterinária
Doenças dos Roedores/epidemiologia
Doenças dos Roedores/microbiologia
Doenças dos Roedores/parasitologia
Trinidad e Tobago/epidemiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1703
[Cu] Atualização por classe:170309
[Lr] Data última revisão:
170309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170113
[St] Status:MEDLINE
[do] DOI:10.1638/2015-0055.1


  4 / 16 MEDLINE  
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[PMID]:27458115
[Au] Autor:Sousa FC; Pessoa GT; Moura LS; Rodrigues RP; Diniz AN; Souza AB; Silva EG; Sanches MP; Silva-Filho OF; Guerra PC; Sousa JM; Neves WC; Alves FR
[Ad] Endereço:Faculty of Medical Science, State University of Piauí, Teresina, Piauí, Brazil.
[Ti] Título:Doppler ultrasound of the placenta and maternal and fetal vessels during normal gestation in captive agoutis (Dasyprocta prymnolopha, Wagler, 1831).
[So] Source:Theriogenology;86(8):1921-30, 2016 Nov.
[Is] ISSN:1879-3231
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The use of ultrasound for pregnancy monitoring is critical for the evaluation of hemodynamic parameters essential to fetal viability. In the present study, using B-mode and Doppler ultrasound, we characterized the placenta, subplacenta, maternal, and fetal vessels during normal gestation of healthy agoutis raised in captivity. In total, 30 agoutis were obtained from the Center for the Study and Preservation of Wild Animals, Center of Agricultural Sciences, Federal University of Piauí (Núcleo de Estudos e Preservação de Animais Silvestres-NEPAS, Centro de Ciências Agrárias-CCA, Universidade Federal do Piauí-UFPI). These animals were subjected to B-mode and Doppler ultrasound examinations to evaluate their maternal and fetal hemodynamic profiles. The placenta was located in the mesometrial region and had a discoid, ellipsoid, or globular aspect. With spectral Doppler, characteristic systolic and diastolic flow was observed in the umbilical artery. This flow increased during pregnancy. A cross-sectional view revealed a goblet-shaped placenta. The uteroplacental blood flow was characterized by a marked increase in systolic peak velocity during pregnancy, the presence of a rapid deceleration ramp, and a relatively high diastolic speed. The fetal aortic vascular flow was predominantly systolic and diastolic. The caudal vena cava blood flow was characterized by a systolic peak followed by a decreased diastolic wave throughout pregnancy. In the present study, we characterized the morphologic and hemodynamic interactions of the placenta/subplacenta with maternal and fetal vessels in agoutis at 30, 45, 60, 75, and 90 days gestation using B-mode and Doppler ultrasound. We determined the approximation and separation of the blood flow values of the umbilical artery, subplacental flow, uteroplacental artery, fetal aorta, and fetal vena cava. We believe these values may contribute to an understanding of the gestational biology and aid delivery prediction in this species.
[Mh] Termos MeSH primário: Dasyproctidae/anatomia & histologia
Feto/anatomia & histologia
Placenta/anatomia & histologia
Ultrassonografia Doppler/veterinária
Ultrassonografia Pré-Natal/veterinária
[Mh] Termos MeSH secundário: Animais
Velocidade do Fluxo Sanguíneo/veterinária
Dasyproctidae/fisiologia
Feminino
Feto/irrigação sanguínea
Feto/fisiologia
Troca Materno-Fetal
Gravidez
Fluxo Sanguíneo Regional
Artérias Umbilicais/diagnóstico por imagem
Artéria Uterina/diagnóstico por imagem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170508
[Lr] Data última revisão:
170508
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160727
[St] Status:MEDLINE


  5 / 16 MEDLINE  
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[PMID]:27387934
[Au] Autor:Escobar H
[Ti] Título:Rewilding Rio.
[So] Source:Science;353(6295):113-5, 2016 Jul 08.
[Is] ISSN:1095-9203
[Cp] País de publicação:United States
[La] Idioma:eng
[Mh] Termos MeSH primário: Recuperação e Remediação Ambiental
Floresta Úmida
[Mh] Termos MeSH secundário: Alouatta
Animais
Brasil
Dasyproctidae
[Pt] Tipo de publicação:NEWS
[Em] Mês de entrada:1610
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160709
[St] Status:MEDLINE
[do] DOI:10.1126/science.353.6295.113


  6 / 16 MEDLINE  
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[PMID]:27165129
[Au] Autor:Al-Hussaini H; Kilarkaje N; Shahabi G; Al-Mulla F
[Ad] Endereço:Department of Anatomy, Faculty of Medicine, Kuwait University, Safat, Kuwait.
[Ti] Título:Proliferation and Migration of Peripheral Retinal Pigment Epithelial Cells Are Associated with the Upregulation of Wingless-Related Integration and Bone Morphogenetic Protein Signaling in Dark Agouti Rats.
[So] Source:Med Princ Pract;25(5):408-16, 2016.
[Is] ISSN:1423-0151
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:OBJECTIVE: The aim of this study was to investigate the possible migration of proliferating peripheral retinal pigment epithelial (RPE) cells and their association with differential gene expressions. MATERIALS AND METHODS: The RPE layer was obtained from the inner aspect of the eyeball of dark agouti rats (12-13 weeks old) and was mounted on glass slides. The peripheral RPE cell proliferation was evaluated using bromodeoxyuridine immunohistochemistry (n = 10). The cell migration was examined using the Dil tracer technique (n = 40) at the end of weeks 6, 10, 14 and 18. Affymetrix microarray analysis was used to investigate differential gene expressions in peripheral and central RPE cells, which was authenticated by RT-PCR using 4 RPE-specific genes (n = 10). RESULTS: In this study, peripheral RPE cells divided and appeared in clusters, but equatorial and central RPE cells rarely divided. The peripheral RPE cells migrated to the central RPE region in a time-dependent manner up to the end of week 14, but not later. The microarray analysis showed the expression of 9,645 out of a total of 35,220 genes studied. Among the 9,645 genes, 573 were differentially expressed (438 were upregulated and 135 were downregulated) in peripheral RPE cells as compared to central RPE cells. Of these 573 genes, 56 were associated with signaling pathways related to the regulation of cell proliferation, including Pax6, TGFß, BMP and Wnt, and 404 were associated with pathways of cell migration. CONCLUSIONS: In this study, peripheral RPE cells divided and migrated to the central region. This process was associated with differential gene expressions in these cells.
[Mh] Termos MeSH primário: Proteínas Morfogenéticas Ósseas/metabolismo
Movimento Celular/genética
Proliferação Celular/genética
Epitélio Pigmentado da Retina/citologia
[Mh] Termos MeSH secundário: Animais
Dasyproctidae
Regulação para Baixo
Regulação da Expressão Gênica
Masculino
Análise Serial de Proteínas
RNA Mensageiro
Transdução de Sinais
Fatores de Tempo
Regulação para Cima
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Bone Morphogenetic Proteins); 0 (RNA, Messenger)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:171102
[Lr] Data última revisão:
171102
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160512
[St] Status:MEDLINE
[do] DOI:10.1159/000446480


  7 / 16 MEDLINE  
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[PMID]:27023113
[Au] Autor:Leichsenring A; Bäcker I; Furtmüller PG; Obinger C; Lange F; Flemmig J
[Ad] Endereço:Fraunhofer Institute for Cell Therapy and Immunology (IZI) Leipzig, Perlickstraße 1, 04103 Leipzig, Germany.
[Ti] Título:Long-Term Effects of (-)-Epigallocatechin Gallate (EGCG) on Pristane-Induced Arthritis (PIA) in Female Dark Agouti Rats.
[So] Source:PLoS One;11(3):e0152518, 2016.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Rheumatoid arthritis (RA)--a widespread chronic inflammatory disease in industrialized countries--is characterized by a persistent and progressive joint destruction. The chronic pro-inflammatory state results from a mutual activation of the innate and the adaptive immune system, while the exact pathogenesis mechanism is still under discussion. New data suggest a role of the innate immune system and especially polymorphonuclear granulocytes (PMNs, neutrophils) not only during onset and the destructive phase of RA but also at the chronification of the disease. Thereby the enzymatic activity of myeloperoxidase (MPO), a peroxidase strongly abundant in neutrophils, may be important: While its peroxidase activity is known to contribute to cartilage destruction at later stages of RA the almost MPO-specific oxidant hypochlorous acid (HOCl) is also discussed for certain anti-inflammatory effects. In this study we used pristane-induced arthritis (PIA) in Dark Agouti rats as a model for the chronic course of RA in man. We were able to shown that a specific detection of the HOCl-producing MPO activity provides a sensitive new marker to evaluate the actual systemic inflammatory status which is only partially detectable by the evaluation of clinical symptoms (joint swelling and redness measurements). Moreover, we evaluated the long-term pharmacological effect of the well-known anti-inflammatory flavonoid epigallocatechin gallate (EGCG). Thereby only upon early and continuous oral application of this polyphenol the arthritic symptoms were considerably diminished both in the acute and in the chronic phase of the disease. The obtained results were comparable to the treatment control (application of methotrexate, MTX). As revealed by stopped-flow kinetic measurements, EGCG may regenerate the HOCl-production of MPO which is known to be impaired at chronic inflammatory diseases like RA. It can be speculated that this MPO activity-promoting effect of EGCG may contribute to the pharmacological mode of action of this polyphenol.
[Mh] Termos MeSH primário: Artrite/induzido quimicamente
Artrite/tratamento farmacológico
Catequina/análogos & derivados
[Mh] Termos MeSH secundário: Animais
Artrite/sangue
Biomarcadores/sangue
Catequina/farmacologia
Catequina/uso terapêutico
Doença Crônica
Dasyproctidae
Feminino
Inflamação/sangue
Inflamação/patologia
Metotrexato/uso terapêutico
Orosomucoide/metabolismo
Peroxidase/sangue
Ratos
Terpenos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Biomarkers); 0 (Orosomucoid); 0 (Terpenes); 26HZV48DT1 (pristane); 8R1V1STN48 (Catechin); BQM438CTEL (epigallocatechin gallate); EC 1.11.1.7 (Peroxidase); YL5FZ2Y5U1 (Methotrexate)
[Em] Mês de entrada:1608
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160330
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0152518


  8 / 16 MEDLINE  
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[PMID]:26408846
[Au] Autor:Castelo TS; Silva AM; Bezerra LG; Costa CY; Lago AE; Bezerra JA; Campos LB; Praxedes EC; Silva AR
[Ad] Endereço:Laboratório de Conservação de Germoplasma Animal, Universidade Federal Rural do Semi-Árido, BR 110, Km 47, Costa e Silva, 59625-900 Mossoró, RN, Brazil.
[Ti] Título:Comparison among different cryoprotectants for cryopreservation of epididymal sperm from agouti (Dasyprocta leporina).
[So] Source:Cryobiology;71(3):442-7, 2015 Dec.
[Is] ISSN:1090-2392
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:We verify the effects of different cryoprotectants on the cryopreservation of agouti (Dasyprocta leporina) epididymal sperm. We used 16 pairs of testes-epididymis complexes of sexually mature animals. We immediately evaluated epididymal sperm obtained by retrograde flushing for concentration, motility, vigor, viability, osmotic response, and morphology. Samples were extended in a coconut water extender plus 20% egg yolk, containing glycerol, ethylene glycol, dimethylsulfoxide - DMSO, or dimethylformamide. Finally, samples were stored in 0.25 mL straws, frozen in liquid nitrogen, and thawed after one week, being reevaluated and assessed for membrane integrity using fluorescent probes. The higher values for postthawing sperm motility, vigor, and membrane integrity were achieved by the usage of glycerol, when compared to ethylene glycol and dimethylformamide (P < 0.05); however, no differences were found between glycerol and DMSO (P > 0.05). All cryoprotectants provided a similar effect on the preservation of sperm morphology, osmotic response, and viability (P > 0.05). Therefore, here onwards, there was testing of glycerol and DMSO at 3 and 6% concentrations using the same freezing-thawing protocol reported previously. As the main result, DMSO at 6% concentration provided a decrease in sperm parameters, as well as in the chromatin integrity and in the binding capability of sperm. In conclusion, glycerol 3 or 6% and DMSO 3% can be used as alternative cryoprotectants for agouti epididymal sperm cryopreservation.
[Mh] Termos MeSH primário: Criopreservação/métodos
Crioprotetores/farmacologia
Preservação do Sêmen/métodos
[Mh] Termos MeSH secundário: Animais
Sobrevivência Celular/efeitos dos fármacos
Dasyproctidae
Dimetil Sulfóxido/farmacologia
Dimetilformamida/farmacologia
Epididimo/efeitos dos fármacos
Etilenoglicol/farmacologia
Congelamento
Glicerol/farmacologia
Masculino
Motilidade Espermática/efeitos dos fármacos
Espermatozoides/efeitos dos fármacos
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Cryoprotective Agents); 8696NH0Y2X (Dimethylformamide); FC72KVT52F (Ethylene Glycol); PDC6A3C0OX (Glycerol); YOW8V9698H (Dimethyl Sulfoxide)
[Em] Mês de entrada:1608
[Cu] Atualização por classe:151224
[Lr] Data última revisão:
151224
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150927
[St] Status:MEDLINE


  9 / 16 MEDLINE  
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[PMID]:26056885
[Au] Autor:de Moura CR; das Neves Diniz A; da Silva Moura L; das Chagas Araújo Sousa F; Baltazar PI; Freire LD; Guerra PC; de Sousa JM; Giglio RF; Pessoa GT; de Sá RP; Alves FR
[Ti] Título:CARDIOTHORACIC RATIO AND VERTEBRAL HEART SCALE IN CLINICALLY NORMAL BLACK-RUMPED AGOUTIS (DASYPROCTA PRYMNOLOPHA, WAGLER 1831).
[So] Source:J Zoo Wildl Med;46(2):314-9, 2015 Jun.
[Is] ISSN:1042-7260
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Wild rodents, such as the lowland paca (Cuniculus paca), capybara (Hydrochoerus hydrochaeris), rock cavy (Kerodon rupestris), guinea pig (Cavia aperea), and black-rumped agouti (Dasyprocta prymnolopha) are intensely hunted throughout Amazonia and at the semiarid regions of northeastern Brazil. To contribute to the preservation of these species, more information about their anatomy, physiology and pathophysiology is needed. The aim of this study was to standardize the vertebral heart scale (VHS) and cardiothoracic ratio (CTR) in clinically normal black-rumped agouti, as well as to compare the results of these two methods, which are commonly used to evaluate the cardiac silhouette in domestic animals. Twelve healthy black-rumped agoutis, divided into two groups (six males and six females), obtained from the Nucleus for Wild Animal Studies and Conservation at the Federal University of Piauí, were radiographed in right and left lateral and dorsoventral projections. The values of the VHS were 8.00±0.31v (the number of thoracic vertebral length spanned by each dimension, starting at T4) for males and 8.11±0.41v for females, and there was no statistical difference between the decubitus (right and left) or between males and females (P>0.05). The CTR mean values obtained were 0.51±0.03 for males, and 0.52±0.02 for females, and there was no statistical difference between the genders (P>0.05). However, there was positive correlation between VHS and CTR (r=0.77 right decubitus and r=0.82 left decubitus). The thoracic and heart diameter had mean values of 6.72±0.61 and 3.48±0.30 cm (males), and for the females, it was 6.61±0.51 and 3.5±0.30 cm, respectively, and there was statistical difference between the genders. The results demonstrated high correlation between the VHS and CTR producing similar results, indicating similar clinical precision for assessing the size of the cardiac silhouette in the black-rumped agoutis.
[Mh] Termos MeSH primário: Dasyproctidae/anatomia & histologia
Coração/anatomia & histologia
[Mh] Termos MeSH secundário: Animais
Feminino
Coração/diagnóstico por imagem
Masculino
Radiografia
Fatores Sexuais
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1508
[Cu] Atualização por classe:161125
[Lr] Data última revisão:
161125
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150610
[St] Status:MEDLINE
[do] DOI:10.1638/2014-0038R.1


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[PMID]:25970832
[Au] Autor:Kuprewicz EK
[Ad] Endereço:Department of Biology, University of Miami, Coral Gables, Florida, United States of America.
[Ti] Título:Scatter hoarding of seeds confers survival advantages and disadvantages to large-seeded tropical plants at different life stages.
[So] Source:PLoS One;10(5):e0124932, 2015.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Scatter hoarding of seeds by animals contributes significantly to forest-level processes, including plant recruitment and forest community composition. However, the potential positive and negative effects of caching on seed survival, germination success, and seedling survival have rarely been assessed through experimental studies. Here, I tested the hypothesis that seed burial mimicking caches made by scatter hoarding Central American agoutis (Dasyprocta punctate) enhances seed survival, germination, and growth by protecting seeds from seed predators and providing favorable microhabitats for germination. In a series of experiments, I used simulated agouti seed caches to assess how hoarding affects seed predation by ground-dwelling invertebrates and vertebrates for four plant species. I tracked germination and seedling growth of intact and beetle-infested seeds and, using exclosures, monitored the effects of mammals on seedling survival through time. All experiments were conducted over three years in a lowland wet forest in Costa Rica. The majority of hoarded palm seeds escaped predation by both invertebrates and vertebrates while exposed seeds suffered high levels of infestation and removal. Hoarding had no effect on infestation rates of D. panamensis, but burial negatively affected germination success by preventing endocarp dehiscence. Non-infested palm seeds had higher germination success and produced larger seedlings than infested seeds. Seedlings of A. alatum and I. deltoidea suffered high mortality by seed-eating mammals. Hoarding protected most seeds from predators and enhanced germination success (except for D. panamensis) and seedling growth, although mammals killed many seedlings of two plant species; all seedling deaths were due to seed removal from the plant base. Using experimental caches, this study shows that scatter hoarding is beneficial to most seeds and may positively affect plant propagation in tropical forests, although tradeoffs in seed survival do exist.
[Mh] Termos MeSH primário: Arecaceae/fisiologia
Dasyproctidae/fisiologia
Dispersão de Sementes/fisiologia
Plântulas/fisiologia
Sementes/fisiologia
[Mh] Termos MeSH secundário: Animais
Arecaceae/parasitologia
Coleópteros/fisiologia
Costa Rica
Dasyproctidae/psicologia
Comportamento Alimentar/fisiologia
Comportamento Alimentar/psicologia
Florestas
Germinação/fisiologia
Plântulas/parasitologia
Sementes/parasitologia
Árvores/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1602
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150514
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0124932



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