Antifibrotic effect of Pluchea sagitallis (Lam.) cabrera aqueous extract in grx cell lineage

Liver fibrosis is a complex disease that is caused by inappropriate tissue repair due to the deposition of connective tissue. When a chronic lesion affects the liver, regenerative response fails and hepatocytes are replaced with abundant extracellular matrix (ECM). The imbalance between production and degradation of ECM will result in the accumulation of proteins that change normal liver architecture, and thus its functionality. The main source of ECM is the activated hepatic stellate cell (HSC). In order, to clarify possible therapeutic approaches to the disease, this work aimed to evaluate the possible antifibrotic action of Pluchea sagitallis (Lam.) Cabrera on an activated HSC immortalized lineage (GRX).Our results demonstrated that the P. sagittalis aqueous extract at 0.039 and 0.078 mg/mL concentrations was able to reduce cell growth and proliferation. Regarding to oxidative stress evaluation, there was no statistically significant difference between the treated group and the control. Staining with OilRed-O (ORO) showed a statistically significant increase in intracellular lipid content after 5 days of treatment, exerting in vitro effect on the GRX phenotypic change of activated towards the quiescent state. These results were confirmed by colorimetric quantification of lipid content. Regarding the TGF-β1 and collagen production, there were no statistically significant differences observed between the groups.In conclusion, the P. sagittalis aqueous extract reduces the growth and proliferation of GRX cells and induces the reversal of activated towards a quiescent phenotype. There was no decrease in cell proliferation either by necrosis or by apoptosis via activation of the senescence. Thus, our data suggest that the extract showed an antifibrotic effect, possibly by activating phenotype reversal

Avalia??o do efeito da liraglutida, um an?logo do GLP-1, na prolifera??o das c?lulas pr?-osteobl?sticas MC3T3 E1

Submitted by Setor de Tratamento da Informa??o - BC/PUCRS ([email protected]) on 2016-05-17T12:16:55Z No. of bitstreams: 1 DIS_JULIANA_ROMEU_MARQUES_COMPLETO.pdf: 1432001 bytes, checksum: 2d6dc8303449f3f554bf97804d426795 (MD5)Made available in DSpace on 2016-05-17T12:16:55Z (GMT). No. of bitstreams: 1 DIS_JULIANA_ROMEU_MARQUES_COMPLETO.pdf: 1432001 bytes, checksum: 2d6dc8303449f3f554bf97804d426795 (MD5) Previous issue date: 2016-02-16Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPESThe liraglutide is a glucagon-like peptide 1 (GLP-1) based therapy and an alternative treatment to type 2 diabetes mellitus (T2DM). Apart from its hypogliycemic effect, the drug has been also associated with the prevention of cardiovascular diseases, regulation of blood lipid and anti-inflammatory action. Reports indicate, however, that liraglutide can increase the risk of thyroid cancer and cause pancreatitis. Besides, studies demonstrated that some analogues of GLP-1 have a deleterious bone effect, while others demonstrated to be benefic to the bone. The aim of this study was to evaluate the effect in vitro of liraglutide in mouse pre-osteoblastic cells, MC3T3-E1. The results demonstrated that liraglutide significantly decreased the number of viable cells without inducing apoptosis. The mechanism of this effect is associated to the reactive oxygen species production (ROS), which resulted in an increase of cell autophagy. The decreased number of viable cells indicates therefore that liraglutide may affect the bone formation.A liraglutida ? uma terapia baseada no horm?nio GLP-1 utilizada como tratamento alternativo para a diabetes mellitus tipo 2 (DM2). O medicamento, al?m do efeito hipoglicemiante, tem sido associado ? preven??o de doen?as cardiovasculares, diminui??o dos lip?deos no sangue e ? a??o anti-inflamat?ria. Relatos indicam, por?m, que a liraglutida pode aumentar o risco de c?ncer de tireoide e provocar pancreatite. Al?m disso, estudos demonstram que alguns an?logos do GLP-1 t?m efeito ?sseo delet?rio, enquanto outros t?m efeito ben?fico. O objetivo deste estudo ? avaliar o efeito da liraglutida sobre o crescimento de c?lulas pr?-osteobl?sticas (MC3T3-E1). Os resultados t?m demonstrado que a liraglutida diminuiu significativamente o n?mero de c?lulas sem induzir a apoptose. O mecanismo deste efeito est? associado ? produ??o de esp?cies reativas de oxig?nio, que resulta em um aumento da autofagia das c?lulas, indicando, desta forma, que pode afetar a forma??o ?ssea

Determinação do perfil imunológico de indivíduos com excesso de peso de acordo com o grau de obesidade

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Characterisation of microbial attack on archaeological bone

As part of an EU funded project to investigate the factors influencing bone preservation in the archaeological record, more than 250 bones from 41 archaeological sites in five countries spanning four climatic regions were studied for diagenetic alteration. Sites were selected to cover a range of environmental conditions and archaeological contexts. Microscopic and physical (mercury intrusion porosimetry) analyses of these bones revealed that the majority (68%) had suffered microbial attack. Furthermore, significant differences were found between animal and human bone in both the state of preservation and the type of microbial attack present. These differences in preservation might result from differences in early taphonomy of the bones. © 2003 Elsevier Science Ltd. All rights reserved

NEOTROPICAL CARNIVORES: a data set on carnivore distribution in the Neotropics

Mammalian carnivores are considered a key group in maintaining ecological health and can indicate potential ecological integrity in landscapes where they occur. Carnivores also hold high conservation value and their habitat requirements can guide management and conservation plans. The order Carnivora has 84 species from 8 families in the Neotropical region: Canidae; Felidae; Mephitidae; Mustelidae; Otariidae; Phocidae; Procyonidae; and Ursidae. Herein, we include published and unpublished data on native terrestrial Neotropical carnivores (Canidae; Felidae; Mephitidae; Mustelidae; Procyonidae; and Ursidae). NEOTROPICAL CARNIVORES is a publicly available data set that includes 99,605 data entries from 35,511 unique georeferenced coordinates. Detection/non-detection and quantitative data were obtained from 1818 to 2018 by researchers, governmental agencies, non-governmental organizations, and private consultants. Data were collected using several methods including camera trapping, museum collections, roadkill, line transect, and opportunistic records. Literature (peer-reviewed and grey literature) from Portuguese, Spanish and English were incorporated in this compilation. Most of the data set consists of detection data entries (n = 79,343; 79.7%) but also includes non-detection data (n = 20,262; 20.3%). Of those, 43.3% also include count data (n = 43,151). The information available in NEOTROPICAL CARNIVORES will contribute to macroecological, ecological, and conservation questions in multiple spatio-temporal perspectives. As carnivores play key roles in trophic interactions, a better understanding of their distribution and habitat requirements are essential to establish conservation management plans and safeguard the future ecological health of Neotropical ecosystems. Our data paper, combined with other large-scale data sets, has great potential to clarify species distribution and related ecological processes within the Neotropics. There are no copyright restrictions and no restriction for using data from this data paper, as long as the data paper is cited as the source of the information used. We also request that users inform us of how they intend to use the data