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| Registros recuperados: 12 | |
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| Solari,Alberto J.; Rahn,Monica I.; Saura,Alicia; Lujan,Hugo D.. |
| The fine structure of the binucleate, parasitic protist Giardia lamblia during interphase and divisional stages was studied by serial thin sectioning and three-dimensional reconstructions. The earlier sign of nuclear division is the development of a few peripheral areas of densely packed chromatin directly attached to the inner nuclear envelope. An intracytoplasmic sheet of ventral disk components grows from the cell periphery towards one of the nuclei, apparently constricting this nucleus, which becomes located at a ventral bulge. After the basal bodies become duplicated, a full nuclear division occurs in trophozoites, giving two pairs of parent-daughter nuclei. This full division occurs in a dorsal-ventral direction, with the resulting nuclear pairs... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Giardia; Primitive mitosis; Fine structure of mitosis; Protist mitosis; Cell differentiation. |
| Ano: 2003 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452003000300004 |
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| Ouattara, T.A.S.; Adepo-Gouréné, A.B.; Atsé, B.C.. |
| Ces résultats nous laissent supposer que dans la Bia, nous avons plus de deux espèces de Chrysichthys. Soit, nous avons quatre espèces assez distinctes les unes des autres mais dont trois sont assez proches de par leurs caractères morphologiques soit, nous avons des espèces hybrides des deux espèces jusque là connus et une troisième espèce non encore répertoriée dans la Bia. Ce travail préliminaire méritait d'être poursuivi avec un nombre plus élevé de spécimens et l'étude d'un plus grand nombre de systèmes enzymatiques. A la différenciation génétique, seront associée une étude morphologique et morphométrique. Cette étude s'avère d'autant plus importante qu'elle porte sur des espèces de poissons intéressant l'aquaculture en Côte d'Ivoire et en général en... |
| Tipo: Journal Contribution |
Palavras-chave: Fish species; Cell differentiation. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/5779 |
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| Folgueira,M.A.A.K.; Federico,M.H.H.; Roela,R.A.; Maistro,S.; Katayama,M.L.H.; Brentani,M.M.. |
| A close correlation between vitamin D receptor (VDR) abundance and cell proliferation rate has been shown in NIH-3T3 fibroblasts, MCF-7 breast cancer and in HL-60 myeloblastic cells. We have now determined if this association occurs in other leukemic cell lines, U937 and K562, and if VDR content is related to c-myc expression, which is also linked to cell growth state. Upon phorbol myristate acetate (PMA) treatment, cells from the three lineages (HL-60, U937 and K562) differentiated and expressed specific surface antigens. All cell lines analyzed were growth inhibited by PMA and the doubling time was increased, mainly due to an increased fraction of cells in the G0/G1 phase, as determined by flow cytometry measurements of incorporated bromodeoxyuridine and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Receptors; Calcitriol; Cell division; Cell differentiation; Leukemia; Phorbol esters. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000500011 |
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| Rocha,A.R.; Leite,Y.K.C.; Silva,A.S.; Conde Júnior,A.M.; Costa,C.R.M.; Silva,G.C.; Bezerra,D.O.; Cavalcante,M.M.A.S.; Feitosa,M.L.T.; Argôlo Neto,N.M.; Serakides,R.; Carvalho,M.A.M.. |
| ABSTRACT There is a growing interest in the study of unspecialized mesenchymal stem cells, for there are still some discussions about their in vitro behavior. Regenerative medicine is a science undergoing improvement which develops treatments as cell therapy using somatic stem cells. In several studies, adipose tissue is presented as a source of multipotent adult cells that has several advantages over other tissue sources. This study aimed to characterize and evaluate the tagging of mesenchymal stem cells from the agoutis adipose tissue (Dasyprocta prymonolopha), with fluorescent intracytoplasmic nanocrystals. Fibroblast cells were observed, plastic adherent, with extended self-renewal, ability to form colonies, multipotency by differentiation into three... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cell culture; Mesenchymal; Stem cells; Adipose tissue; Cell differentiation; Fluorescent nanocrystals. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000501571 |
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| Covas,D.T.; Siufi,J.L.C.; Silva,A.R.L.; Orellana,M.D.. |
| Bone marrow contains a population of stem cells that can support hematopoiesis and can differentiate into different cell lines including adipocytes, osteocytes, chondrocytes, myocytes, astrocytes, and tenocytes. These cells have been denoted mesenchymal stem cells. In the present study we isolated a cell population derived from the endothelium and subendothelium of the umbilical cord vein which possesses morphological, immunophenotypical and cell differentiation characteristics similar to those of mesenchymal stem cells isolated from bone marrow. The cells were isolated from three umbilical cords after treatment of the umbilical vein lumen with collagenase. The cell population isolated consisted of adherent cells with fibroblastoid morphology which, when... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Mesenchymal stem cells; Umbilical vein; Adipocytes; Osteocytes; Cell differentiation. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000900006 |
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| Gheisari,Yousof; Soleimani,Masoud; Zeinali,Sirous; Arefian,Ehsan; Atashi,Amir; Nikougoftar Zarif,Mahin. |
| The kidney has an inherent ability for recovery and regeneration following acute damage. However, there has been much contention as to the source of regenerating renal cells. The aim of this study was to isolate and characterize these cells. Normal rat kidneys were minced and cells were isolated with collagenase I and were cultured in an expansion medium. Adherent cells were isolated and expanded for more than 120 days in vitro. These cells had the potential of translineage differentiation into neural cells, adipocytes and osteocytes. These cells also expressed Nucleostemin, Cyclin D1, Notch1 and Survivin which are commonly expressed in stem cells. The results of the current work show that the adult kidney contains a population of multipotent stem cells. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Kidney failure; Regeneration; Cell differentiation; Renal replacement therapy. |
| Ano: 2009 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452009000100004 |
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| Borkosky,Silvia S.; Nagatsuka,Hitoshi; Orita,Yorihisa; Tsujigiwa,Hidetsugu; Yoshinobu,Junko; Gunduz,Mehmet; Rodriguez,Andrea P.; Missana,Liliana R.; Nishizaki,Kazunori; Nagai,Noriyuki. |
| The Notch signaling pathway is an evolutionary conserved mechanism that plays an important role in cell-cell communication and cell fate in a wide range of tissues. The mammalian family of Notch receptors consists of 4 members: Notch1/2/3/4. The Notch ligand family consists of 5 members: Delta1/3/4 and Jagged1/2. Math1 encodes a murine basic helix-loop-helix (bHLH) transcription factor that acts as positive regulator of cell differentiation. Recently, links between Notch and Math1 pathways were demonstrated in various tissues. Expression of Notch1, Jagged2 and Math1 were analyzed in the mouse molar tooth germ during embryonic stage (E) 13 and E15 and during postnatal stage (PN) 1, PN3, PN5, PN10 and PN14 by using in situ hybridization. Positive Notch1... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Notch signaling; Odontogenesis; Cell differentiation; Molar morphogenesis. |
| Ano: 2008 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452008000300006 |
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| Dornelas,Marcelo Carnier. |
| The elaboration of plant form and function depends on the ability of a plant cell to divide and differentiate. The decisions of individual cells to enter the cell cycle, maintain proliferation competence, become quiescent, expand, differentiate, or die depend on cell-to-cell communication and on the perception of various signals. These signals can include hormones, nutrients, light, temperature, and internal positional and developmental cues. In recent years, progress has been made in understanding the molecular control of plant pattern formation, especially in the model plant Arabidopsis thaliana. Furthermore, specific genes have been found that are necessary for normal pattern formation and the control of the rates of cell division and differentiation.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cell differentiation; Developmental genetics; Transduction pathways. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202003000100001 |
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| Registros recuperados: 12 | |
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