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| Registros recuperados: 29 | |
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| SOARES,GIULIANA C.M.; DIAS,DENISE C.F.S.; FARIA,JOSÉ M.R.; BORGES,EDUARDO E.L.. |
| ABSTRACT We investigated the loss of desiccation tolerance (DT) in Adenanthera pavonina seeds during germination. Seeds were subjected to imbibition for 0, 24, 36, 48, 60 and 81 h, then dried to their initial moisture content (13%), rehydrated and evaluated for survival (resumption of growth and development of normal seedlings) and membrane system integrity (electrolyte leakage). Embryonic axes of seeds subjected only to imbibition during the same early time periods were used to investigate the electrophoretic patterns of heat-stable proteins and the relative nuclear DNA content. In A. pavonina seeds, DT remained unchanged until 36 h of imbibition (resulting in germination and 82% normal seedlings), after which it was progressively lost, and seeds with a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cell cycle; Desiccation sensitivity; DNA content; Drying; Heat-stable proteins. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000502001 |
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| Borelli,P.; Barros,F.E.V.; Nakajima,K.; Blatt,S.L.; Beutler,B.; Pereira,J.; Tsujita,M.; Favero,G.M.; Fock,R.A.. |
| Protein energy malnutrition (PEM) is a syndrome that often results in immunodeficiency coupled with pancytopenia. Hemopoietic tissue requires a high nutrient supply and the proliferation, differentiation and maturation of cells occur in a constant and balanced manner, sensitive to the demands of specific cell lineages and dependent on the stem cell population. In the present study, we evaluated the effect of PEM on some aspects of hemopoiesis, analyzing the cell cycle of bone marrow cells and the percentage of progenitor cells in the bone marrow. Two-month-old male Swiss mice (N = 7-9 per group) were submitted to PEM with a low-protein diet (4%) or were fed a control diet (20% protein) ad libitum. When the experimental group had lost about 20% of their... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Malnutrition; Hemopoiesis; Cell cycle; Low protein diet. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009000600008 |
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| Zhang,M.; Gan,L.; Ren,G.S.. |
| REGγ is a proteasome activator that facilitates the degradation of small peptides. Abnormally high expression of REGγ has been observed in thyroid carcinomas. The purpose of the present study was to explore the role of REGγ in poorly differentiated thyroid carcinoma (PDTC). For this purpose, small interfering RNA (siRNA) was introduced to down-regulate the level of REGγ in the PDTC cell line SW579. Down-regulation of REGγ at the mRNA and protein levels was confirmed by RT-PCR and Western blot analyses. FACS analysis revealed cell cycle arrest at the G1/S transition, the MTT assay showed inhibition of cell proliferation, and the Transwell assay showed restricted cell invasion. Furthermore, the expression of the p21 protein was increased, the expression of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: REGγ; PDTC; Cell cycle; Cell proliferation; SW579 cell line; Thyroid carcinoma. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012000500012 |
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| Roela,R.A.; Brentani,M.M.; Katayama,M.L.H.; Reis,M.; Federico,M.H.H.. |
| Cells usually lose adhesion and increase proliferation and migration during malignant transformation. Here, we studied how proliferation can affect the other two characteristics, which ultimately lead to invasion and metastasis. We determined the expression of ß1 integrins, as well as adhesion and migration towards laminin-1, fibronectin, collagens type I and type IV presented by LISP-1 colorectal cancer cells exposed to 2.5% dimethyl sulfoxide (DMSO), an agent capable of decreasing proliferation in this poorly differentiated colorectal cell line. Untreated cells (control), as shown by flow cytometry and monoclonal antibodies, expressed alpha2 (63.8 ± 11.3% positive cells), alpha3 (93.3 ± 7.0%), alpha5 (50.4 ± 12.0%) and alpha6 (34.1 ± 4.9%) integrins but... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cell adhesion molecules; Cell migration; Integrin; Cell cycle; DMSO. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000800016 |
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| Yun Li,Zong; Li Fu,Mei; Fang Hu,Fang; Feng Huang,Shu; Chun Song,Yun. |
| The ribosomal DNA (45S rDNA) behaviors during the cell cycle were analyzed on interphase nuclei, prophases, metaphases, pachytene chromosomes and extended DNA fibers in rice (Oryza,sativa ssp.indica cv.Guangluai No.4) by using high-resolution fluorescent in situ hybridization (FISH). The results show that 45S rDNA is located at the ends of short arms of chromosomes 9 and 10. But the signals are much more intense on chromosome 9 than on chromosome 10 in metaphase. Pachytene chromosome has rDNA signal arrays on chromosome 9. Different phases are described and discussed. These results indicate that the activity of rDNA at individual loci may also vary through the cell cycle in rice. On extended DNA fibers, 45S rDNA signals appear as strings of numerous red... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cell cycle; Fluorescent in situ hybridization (FISH); Ribosomal DNA (45S rDNA); Pachytene chromosomes; Indica rice. |
| Ano: 2006 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452006000100004 |
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| Registros recuperados: 29 | |
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