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排序方式: 共有175条查询结果,搜索用时 15 毫秒
1.
Salas-Prato Milagros Tanguay Jean-Francois Lefebvre Yves Wojciechowicz Don Liem H. Heng Barnes David W. Ouellette Ginette Muller-Eberhard Ursula 《In vitro cellular & developmental biology. Plant》1988,24(5):470-470
In Vitro Cellular &; Developmental Biology - Plant - 相似文献
2.
Summary Newborn rat adipocyte precursors, isolated from inguinal fat pads of 2 day-old NBR rats proliferate and undergo adipose differentiation
in defined medium in the absence of serum when cultivated on polylysine coated dishes in DME-F12 medium supplemented with
fibronectin, insulin, transferrin and FGF. After 7 days in culture in these conditions, 90% of the cells have undergone differentiation
as measured by the increase of G3PDH specific activity and by the accumulation of triglycerides in their cytoplasm. In contrast,
the cells cultivated in the presence of 10% fetal bovine serum, have a limited ability to differentiate. These results indicate
that newborn rat adipocyte precursors from inguinal fat pads do not require the presence of an undefined adipogenic factor
in order to differentiate in culture. In contrast, proliferation and differentiation are dependent on the presence of insulin
in the culture medium. Moreover, the data presented in this paper show that the rat adipocyte precursor culture represents
a rapid and reproducible system for investigating the processes of adipose tissue development and for studying the negative
and positive regulators of the adipose differentiation in a controlled environment.
This work was supported by grants from the Juvenile Diabetes Foundation, File #185221 and from the National Institutes of
Health 1 PO1 CA37589.
Editor’s Statement This paper extends to primary cultures the serum-free methods previously applied to studies of adipocyte
differentiation in established lines. The observation that serum can block differentiation in this system suggests the existence
of previously unrecognized circulating plasma or platelet factors affecting adipocyte differentiation, and the model developed
provides an assay for the identification of these factors. 相似文献
3.
Ginette Pauly Abdelhamid Yani Louis Piovetti Colette Bernard-Dagan 《Phytochemistry》1983,22(4):957-959
The essential oils of the leaves of Cupressus dupreziana and Cupressus sempervirens were compared. The composition of the hydrocarbon fraction showed a great similarity between the two species. 相似文献
4.
Anne-Marie Gaben-Cogneville Yolande Aron Ginette Idriss Thérèse Jahchan Jean-Yves Pello Elisabeth Swierczewski 《Biochimica et Biophysica Acta (BBA)/Molecular Cell Research》1983,762(3):437-444
Using a density gradient medium (Percoll) we succeeded in isolating homogeneous cell populations from the stromal-vascular fraction of the inguinal tissue of 3-day-old rats. In primary culture, in medium 199 supplemented with 10% fetal calf serum and 5.5 mM glucose, almost complete differentiation (90%) of these fractions was obtained for the first time in presence of a physiological concentration of insulin (10?9 M). During the adipose conversion, insulin markedly enhanced the activities of glycerol-3-phosphate dehydrogenase and acid:CoA ligase. When VLDL and heparin were added with insulin to the medium, this effect was not potentiated. On the contrary, VLDL and heparin in presence of insulin increased the triglyceride content of the cells. With VLDL and heparin only, the biochemical and morphological characteristics of the cells were very similar to those observed in control culture. The heavier fraction was morphologically heterogeneous and did not undergo the adipose conversion to the same extent as the two lighter fractions. It was concluded that this model could be helpful in studying the proliferation and the differentiation of preadipocytes at an early stage of development. 相似文献
5.
Horst Will Alexander Benenson Ginette Devilliers Paul Mandel 《Journal of neurochemistry》1982,39(4):924-932
Abstract: Plasma membranes were isolated from C6 glioblastoma cells by two methods. In the first method cells were treated with concanavalin A and lysed in hypotonic medium. After partial separation of plasma membranes from other cell material, the lectin was displaced with a-methyl-D-mannoside. In the second method untreated cells or cells iodinated in a lactoperoxidase-catalyzed reaction were homogenized in isotonic medium. Membrane fractions obtaincd by either homogenization procedure were further purified by rate zonal and equilibrium centrifugations into linear density gradients. Disruption of the glioblastoma cell membrane gives rise to heterogeneous assemblies of mem- brane fragments. Two populations of plasma membranes were isolated from untreated and from iodinated cells: a "lighter")membrane fraction characterized by relatively lower sedimentation velocity and buoyant density, and a "heavier" membrane fraction of relatively faster sedimentation velocity and higher buoyant density. Both fractions showed electrophoretic patterns similar to those of 125 I-labeled cell surface proteins. Their specific (Na+ + K+ )-ATPase activity was seven- to eightfold the homogenate activity (recovery, 13.1%). Both fractions were, however, still contaminated by smooth endo- plasmic reticulum, as judged from the activity 0: NADPH-dependent cytochrome c reductase (recovery, 2.4%). It is suggested that plasma membrane fragments present in the two fractions might differ in the organization of their structures, e.g., membrane vesicle intactness and membrane orientation. 相似文献
6.
Louis Piovetti Christian Francisco Ginette Pauly Otmane Benchabane Colette Bernard-Dagan Anne Diara 《Phytochemistry》1981,20(6):1299-1302
Analysis of wood essential oil of Cupressus dupreziana revealed 26 components: 13 monoterpenes and 13 sesquiterpenes. The main components were carv 相似文献
7.
Elmira Jafarieh Yazdi Kevin C. Falk Ginette Séguin-Swartz 《In vitro cellular & developmental biology. Plant》2013,49(6):682-689
Factors affecting microspore embryogenesis of Ethiopian mustard (Brassica carinata A. Braun) were evaluated, including flower bud length, pollen developmental stage, and microspore density. An embryogenic frequency of 300 embryos per Petri plate was observed with NLN (Nitsch-Lichter-Nitsch) medium supplemented with 13% sucrose, 3.0–3.4-mm-long buds, and a plating density of 65,000 microspores/ml. About 65% of the microspores from buds 3.0–3.4-mm long were at the late uninucleate stage. Microspore-derived embryos were successfully transferred to solid medium for germination. After 4 wk, the resulting plantlets were transplanted to a soilless potting mixture and grew well under greenhouse conditions. 相似文献
8.
9.
Justine D. Ceusters Ange A. Mouithys-Mickalad Thierry J. Franck Sandrine Derochette Alain Vanderplasschen Ginette P. Deby-Dupont Didier A. Serteyn 《Mitochondrion》2013,13(5):410-416
Horses are particularly sensitive to excessive inflammatory reaction where myeloperoxidase, a marker of inflammation, may contribute to mitochondrial dysfunctions. This study investigated the interaction between myeloperoxidase and cultured primary equine skeletal myoblasts, particularly its effect on mitochondrial respiration combined or not with anoxia followed by reoxygenation (AR). We showed that active myeloperoxidase entered into the cells, interacted with mitochondria and decreased routine and maximal respirations. When combined with AR, myeloperoxidase caused a further decrease of these respiratory parameters while the leak increased. Our results indicate that myeloperoxidase amplifies the mitochondrial damages initiated by AR phenomenon and alters the mitochondrial function. 相似文献