Lipids trigger changes in the elasticity of the cytoskeleton in plant cells: a cell optical displacement assay for live cell measurements
نویسندگان
چکیده
An assay has been developed to quantitatively measure the tension and elasticity of the cytoskeleton in living plant cells. The cell optical displacement assay (CODA) uses a focused laser beam to optically trap and displace transvacuolar and cortical strands through a defined distance within the cell. Results from these experiments provide evidence for the classification of at least two rheologically distinct cytoskeletal assemblies, cortical and transvacuolar, that differ in their tension and response to both signaling molecules and reagents that perturb the cytoskeleton. It is further demonstrated that the tension of the transvacuolar strands can be significantly decreased by the addition of either linoleic acid, 1,2 dioctanoyl-sn-glycerol, or 1,3 dioctanoylglycerol. These decreases in tension could also be induced by lowering the cytoplasmic pH. In contrast, addition of Ca2+, Mg2+, or the ionophore A23187 to the cells caused a considerable increase in the tension of the transvacuolar strands. The data provides evidence that: (a) linoleic acid may be a signaling molecule in plant cells; (b) diacylglycerol functions as a signaling molecule through a protein kinase C-independent pathway mediated by PLA2; and (c) Ca2+ and pH have regulatory roles for controlling cytoskeleton tension and organization.
منابع مشابه
Auxins and Cytokinins as Antipodal Modulators of Elasticity within the Actin Network of Plant Cells.
The cytoskeleton of plant and animal cells serves as a transmitter, transducer, and effector of cell signaling mechanisms. In plants, pathways for proliferation, differentiation, intracellular vesicular transport, cell-wall biosynthesis, symbiosis, secretion, and membrane recycling depend on the organization and dynamic properties of actin- and tubulin-based structures that are either associate...
متن کاملCell optical displacement assay (CODA)--measurements of cytoskeletal tension in living plant cells with a laser optical trap.
متن کامل
Cytotoxic Effects of Aqueous Extract of Portulaca oleracea on Oral Cancer Cell Line
Background: Portulaca oleracea as a herbal plant has been widely used in traditional medicine to cure many diseases. The therapeutic effects of this plant are exerted through its active ingredients with antioxidant properties. It has been shown that this plant may have cytotoxic effects on cancer cells. In the present study, cytotoxic effects of aqueous extract of Portulaca oleracea on oral cav...
متن کاملIn-vitro Apoptotic Effects of Deferoxamine on the Glioblastoma Cell Line
Background: Research suggests the inhibitory effects of deferoxamine as an iron chelator on erythroleukemia cells. The present study was conducted to investigate the effects of deferoxamine on B92 cells as a model of glial cells carcinoma. Materials and Methods: The present experimental study treated 6×104 B92 cells with 0, 10, 50 and 100 µM of deferoxamine for 24 hours in the presence or absen...
متن کاملCytotoxic and apoptogenic effects of Bryonia aspera root extract against Hela and HN-5 cancer cell lines
Objective: Bryonia aspera (Stev. ex Ledeb) is a plant that grows in northeast of Iran. In the present study, cytotoxic and apoptogenic properties of B. aspera root extract was determined against HN-5(head and neck squamous cell carcinoma) and Hela (cervix adenocarcinoma) cell lines. Materials and Methods: HN-5 and Hela cell lines were cultured in DMEM medium and incubated with different concent...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- The Journal of Cell Biology
دوره 126 شماره
صفحات -
تاریخ انتشار 1994