Consulta: subjectFacets:"Growth factors"
Registros recuperados: 15
Data/hora: 20/05/2024 04:59:06

Comparison of the protocols for obtaining platelet-rich plasma in dogs: a cellular study
Provedor de dados: Ciência Rural
Autores: Vidal Júnior,André William Masseaux; Silva,Ricardo Siqueira da; Marques,Ana Paula Lopes; Souza,Heloísa Justen Moreira de.
ABSTRACT: This study aimed to evaluate two protocols (PA and PB) that are used to obtain canine platelet-rich plasma (PRP) for cellularity. Twenty healthy dogs were used. Blood samples were collected and placed in two tubes of 3.2% sodium citrate. PA used double centrifugation at 210 x g, and 370 x g and PB used double centrifugation with 140 x g and 330 x g. The PRP samples from the protocols were examined in terms of their platelet, erythrocyte, and leukocyte count in the Neubauer chamber, differential leukocyte count and platelet morphological observation in blood smears. Data (mean and standard deviation) were analyzed with the 95% probability t-test (P &lt;0.05) using Pearson’s correlation to test the relationship between platelets and erythrocytes,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth factors; Platelet-rich plasma; Cell therapy; Canines.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000300602

Effect of a submaxillary gland extract on Ehrlich tumor growth in mice
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Weill,P.; Frussa-Filho,R.; Bonamin,L.V.
Ablation of host submaxillary glands modifies Ehrlich tumor growth and tumor-infiltrating leukocytes, possibly by modifications in the serum level of growth factors produced by this gland. To extend this research, 7-month-old male EPM-1 mice (N = 30) were divided into two groups: 1) inoculated with tumor cells previously incubated with submaxillary salivary gland extract (SGE) in PBS for 30 min at 37%; 2) inoculated with tumor cells previously incubated with PBS, under the same conditions. Animals were inoculated into the footpad with 40 µl of a suspension containing 4.5 x 107 tumor cells/ml, and footpad thickness was measured daily for 10 days. Sections and smears of tumor cells were prepared from the tumor mass to determine mitosis frequency, percent of...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Ehrlich ascites carcinoma; Submaxillary salivary gland; Growth factors.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999001000005

Glial fibrillary acidic protein (GFAP): modulation by growth factors and its implication in astrocyte differentiation
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Gomes,F.C.A.; Paulin,D.; Moura Neto,V.
Intermediate filament (IF) proteins constitute an extremely large multigene family of developmentally and tissue-regulated cytoskeleton proteins abundant in most vertebrate cell types. Astrocyte precursors of the CNS usually express vimentin as the major IF. Astrocyte maturation is followed by a switch between vimentin and glial fibrillary acidic protein (GFAP) expression, with the latter being recognized as an astrocyte maturation marker. Levels of GFAP are regulated under developmental and pathological conditions. Upregulation of GFAP expression is one of the main characteristics of the astrocytic reaction commonly observed after CNS lesion. In this way, studies on GFAP regulation have been shown to be useful to understand not only brain physiology but...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: CNS; Astrocyte; Growth factors; Intermediate filaments; GFAP; Vimentin; GFAP gene.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000500016

Heparan sulfate and cell division
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Porcionatto,M.A.; Nader,H.B.; Dietrich,C.P.
Heparan sulfate is a component of vertebrate and invertebrate tissues which appears during the cytodifferentiation stage of embryonic development. Its structure varies according to the tissue and species of origin and is modified during neoplastic transformation. Several lines of experimental evidence suggest that heparan sulfate plays a role in cellular recognition, cellular adhesion and growth control. Heparan sulfate can participate in the process of cell division in two distinct ways, either as a positive or negative modulator of cellular proliferation, or as a response to a mitogenic stimulus.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Heparan sulfate; Glycosaminoglycan; Proteoglycan; Cell division; Cell cycle; Growth factors.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000500006

Heparan sulfate proteoglycans: structure, protein interactions and cell signaling
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: Dreyfuss,Juliana L.; Regatieri,Caio V.; Jarrouge,Thais R.; Cavalheiro,Renan P.; Sampaio,Lucia O.; Nader,Helena B.
Heparan sulfate proteoglycans are ubiquitously found at the cell surface and extracellular matrix in all the animal species. This review will focus on the structural characteristics of the heparan sulfate proteoglycans related to protein interactions leading to cell signaling. The heparan sulfate chains due to their vast structural diversity are able to bind and interact with a wide variety of proteins, such as growth factors, chemokines, morphogens, extracellular matrix components, enzymes, among others. There is a specificity directing the interactions of heparan sulfates and target proteins, regarding both the fine structure of the polysaccharide chain as well precise protein motifs. Heparan sulfates play a role in cellular signaling either as receptor...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycosaminoglycans and protein interactions; Growth factors; Focal adhesion; Extracellular matrix; Cell cycle; Cell proliferation.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000300007

Immunolocalization of HB-EGF in Human Skin by Streptavidin-Peroxidase (HRP) Conjugate Method
Provedor de dados: International Journal of Morphology
Autores: Castrogiovanni,P; Mazzone,V; Imbesi,R.
EGF family growth factors consists of growth factors, such as transforming growth factor (TGF)-a, heparin-binding EGF-like growth factor (HB-EGF), amphiregulin (AR) and epiregulin, autocrine growth factors in normal human keratinocytes. HB-EGF is mitogen for epithelial cells and like other members of the EGF family, HB-EGF exerts its biological effects via interaction with the EGF receptor (EGFR). HB-EGF is an autocrine growth factor for human keratinocytes, and has a possible role as a paracrine growth factor for fibroblast. Our report concerning immunohistochemical localization of HB-EGF in normal skin by using the streptavidin-peroxidase (HRP) conjugate method, confirms previous data, revealing specific patterns of HB-EGF localization. Identification of...
Tipo: Journal article
Palavras-chave: Growth factors; Keratinocytes; Streptavidin-peroxidase conjugate.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000400015

Impact of cigarette smoke and aerobic physical training on histological and molecular markers of prostate health in rats
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Veras,A.S.C.; Baptista,D.B.; dos Santos,N.J.; Thorpe,H.H.A.; Seraphim,P.M.; Florido Neto,A.R.; Teixeira,G.R.
Recent evidence suggests that aerobic physical training may attenuate the deleterious effects of cancer risk factors, including smoking. We investigated the effects of cigarette smoke inhalation and aerobic physical training on the expression of steroid receptors and inflammatory and apoptotic proteins in the prostate. Forty male Wistar rats were distributed in four groups: control (CO), exercise (EXE), cigarette smoke exposure (CS), and cigarette smoke exposure with exercise (CS+EXE). For eight weeks, animals were repeatedly exposed to cigarette smoke for 30 min or performed aerobic physical training either with or without the cigarette smoke inhalation protocol. Following these experiments, we analyzed prostate epithelial morphology and prostatic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Inflammation; Androgen receptor; Growth factors; Endurance exercise; BAX; BCL-2.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2020000500601

Mitogenic activity of fetal bovine serum, fish fry extract, insulin-like growth factor-I, and fibroblast growth factor on brown bullhead catfish cells - BB line
Provedor de dados: Brazilian Journal of Biology
Autores: CYRINO,J. E. P.; MULVANEY,D.R.
Biossays were performed to assess the effects of different levels of growth medium supplementation with fetal bovine serum (FBS), fish fry extract (FE), combinations of FBS and FE, and addition of insulin-like growth factor I (IGF-I) and fibroblast growth factor (FGF) on the proliferation of brown bullhead catfish cells (BB line). Treatments (n = 4) were: 2.5, 5, 10, and 15.0% FBS or FE and 5/2.5, 5/5, 10/2.5, and 10/5 of a FBS/FE combination as supplement to the growth medium, or the addition of 0.1, 1, 2.5, 10, 25, and 75 ng/ml of either IGF-I or FGF to the growth media. Initial cell density was 1.1 x 10(6) cells per well on uncoated 24-well plates. Incubation temperature was 29.5 ± 0.7ºC. Six hours after plating, initial culture medium was removed,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mitogenic activity; Growth factors; Catfish; BB cell line.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000300017

Neoangiogenesis Induced by Progenitor Endothelial Cells: Effect of Fucoidan from Marine Algae
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boisson-vidal, C; Zemani, F; Calliguiri, G; Galy-fauroux, I; Colliec-jouault, Sylvia; Helley, D; Fischer, A-m.
Fucoidans -- sulphated polysaccharides extracted from brown algae - could be beneficial in patients with ischemic diseases. Their antithrombotic and proangiogenic properties promote in animals, neovascularization and angiogenesis which prevent necrosis of ischemic tissue. In 1997, endothelial progenitor cells were first identified in human peripheral blood. They are recruited from bone marrow and contribute to neovascularization after ischemic injury. Mobilization of these cells in ischemic sites is an important step in new vessel formation. It is thought that the progenitors interact with endothelial cells, then extravasate and reach ischemic sites, where they proliferate and differentiate into new blood vessels. Although chemokines, cytokines and...
Tipo: Text
Palavras-chave: Growth factors; Cytokines; Angiogenesis; Neovascularization; Endothelial progenitor cells; Sulphated polysaccharides; Fucoidan.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2168.pdf

Osteogenic molecules for clinical applications: improving the BMP-collagen system
Provedor de dados: Biological Research
Autores: Arrabal,Pilar M; Visser,Rick; Santos-Ruiz,Leonor; Becerra,José; Cifuentes,Manuel.
Among the osteogenic growth factors used for bone tissue engineering, bone morphogenetic proteins (BMPs) are the most extensively studied for use in orthopaedic surgery. BMP-2 and BMP-7 have been widely investigated for developing therapeutic strategies and are the only two approved for use in several clinical applications. Due to the chemical and biological characteristics of these molecules, their authorised uses are always in combination with a carrier based on collagen type I. Although the use of these growth factors is considered safe in the short term, the very high doses needed to obtain significant osteoinduction make these treatments expensive and their long-term safety uncertain, since they are highly pleiotropic and have the capacity to induce...
Tipo: Journal article
Palavras-chave: BMPs; Collagen; FGF-2; Growth factors; Osteogenesis; Recombinant proteins; RGD peptide.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602013000400013

Pamidronate for the treatment of osteoporosis secondary to chronic cholestatic liver disease in Wistar rats
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Pereira,F.A.; Mattar,R.; Facincani,I.; Defino,H.L.A.; Ramalho,L.N.Z.; Jorgetti,V.; Volpon,J.B.; Paula,F.J.A. de.
Osteoporosis is a major complication of chronic cholestatic liver disease (CCLD). We evaluated the efficacy of using disodium pamidronate (1.0 mg/kg body weight) for the prevention (Pr) or treatment (Tr) of cholestasis-induced osteoporosis in male Wistar rats: sham-operated (Sham = 12); bile duct-ligated (Bi = 15); bile duct-ligated animals previously treated with pamidronate before and 1 month after surgery (Pr = 9); bile duct-ligated animals treated with pamidronate 1 month after surgery (Tr = 9). Rats were sacrificed 8 weeks after surgery. Immunohistochemical expression of IGF-I and GH receptor was determined in the proximal growth plate cartilage of the left tibia. Histomorphometric analysis was performed in the right tibia and the right femur was used...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hepatic osteodystrophy; Osteoporosis pathogenesis; Growth factors; Biomechanics; Animal models; Pamidronate.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012001200021

Sombreamento para controle da Antracnose na produção de mudas de açaí-solteiro.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: NOGUEIRA, S. R.; ANDRADE NETO, R. de C.; LUNZ, A. M. P.
O açaí-solteiro (Euterpe precatoria Mart.) é uma palmeira nativa do Estado do Acre, sendo a produção de polpa oriunda do extrativismo. A procura pelo produto é grande e crescente no Brasil e no mundo, estimulando plantios comerciais. No entanto, poucas são as informações sobre a produção de mudas em viveiros e cultivo dessa espécie. Muitas técnicas usadas no seu cultivo, provenientes de recomendações para o açaí-de-touceira (E. oleracea), nem sempre são as mais adequadas, a exemplo do melhor nível de sombreamento para produção de mudas. Principalmente no viveiro o açaí-solteiro é bastante atacado pela antracnose, doença fúngica, causada por Colletrotrichum gloesporiodes, que ocasiona manchas e seca das folhas, levando a altas taxas de mortalidade das...
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Açaí solteiro; Cultivos de viveros; Antracnosis; Colletotrichum sp; Sombra.; Producción de plántulas; Factores de crecimiento; Enfermedades y desórdenes de las plantas; Açaí; Muda; Produção; Viveiro; Sombreamento; Fator de crescimento; Controle ambiental; Doença de planta; Fungo; Antracnose.; Euterpe precatoria; Seedling production; Nursery crops; Shade; Growth factors; Plant diseases and disorders; Fungi; Anthracnose.
Ano: 2010
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/661589

Specific structural features of syndecans and heparan sulfate chains are needed for cell signaling
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Lopes,C.C.; Dietrich,C.P.; Nader,H.B.
The syndecans, heparan sulfate proteoglycans, are abundant molecules associated with the cell surface and extracellular matrix and consist of a protein core to which heparan sulfate chains are covalently attached. Each of the syndecan core proteins has a short cytoplasmic domain that binds cytosolic regulatory factors. The syndecans also contain highly conserved transmembrane domains and extracellular domains for which important activities are becoming known. These protein domains locate the syndecan on cell surface sites during development and tumor formation where they interact with other receptors to regulate signaling and cytoskeletal organization. The functions of cell surface heparan sulfate proteoglycan have been centered on the role of heparan...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Syndecans; Heparan sulfate proteoglycans; Protein kinase C; Growth factors; Cell signaling.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000200001

Temporal expression pattern of the insulin-like growth factor II and fibroblast growth factor transcripts in avian embryogenesis
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Gabriel,Jane Eyre; Alvares,Lúcia Elvira; Coutinho,Luiz Lehmann.
In this study, the abundance of IGF-II and bFGF transcripts was estimated in the chicken embryos using the competitive RT-PCR analysis. Significant enhancements in the abundance of IGF-II mRNA were observed at stages HH1 and 5, and a new accumulation in these levels was observed at stage HH18 in comparison to the basal levels. The abundance of bFGF mRNA increased significantly at stages HH18 and 20, followed by an upregulation in the expression of these transcripts at stage HH26. These findings provided important information about the temporal expression pattern of IGF-II and bFGF transcripts in the whole chicken embryos during in ovo development.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chicken embryos; Temporal expression; Competitive RT-PCR; Growth factors.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000500011

The specificity of interactions between proteins and sulfated polysaccharides
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: Mulloy,Barbara.
Sulfated polysaccharides are capable of binding with proteins at several levels of specificity. As highly acidic macromolecules, they can bind non-specifically to any basic patch on a protein surface at low ionic strength, and such interactions are not likely to be physiologically significant. On the other hand, several systems have been identified in which very specific substructures of sulfated polysaccharides confer high affinity for particular proteins; the best-known example of this is the pentasaccharide in heparin with high affinity for antithrombin, but other examples may be taken from the study of marine invertebrates: the importance of the fine structure of dermatan sulfate (DS) to its interaction with heparin cofactor II (HCII), and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sulfated polysaccharides; Fucans; Dermatan sulfate; Heparan sulfate; Heparin; Protein structure; Growth factors; Development.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652005000400007