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262) In non-cytotoxic concentrations, in vitro assessment of the immunotoxic effects displayed moderate but significant suppression of proliferative activity of T-lymphocytes and T-dependent B-cell response in cultures stimulated with PWM > CON A, and no changes in PHA cultures.
* Immunotoxicity and genotoxicity testing of PLGA-PEO nanoparticles in human blood cell model.
- A human blood cell model for immunotoxicity and genotoxicity testing was used to measure the response to polylactic-co-glycolic acid (PLGA-PEO) nanoparticle (NP) (0.12, 3, 15 and 75 μg/cm(2) exposure in fresh peripheral whole blood cultures/isolated peripheral blood mononuclear cell cultures from human volunteers (n = 9-13). PLGA-PEO NPs were not toxic up to dose 3 μg/cm(2); dose of 75 μg/cm(2) displays significant decrease in [(3)H]-thymidine incorporation into DNA of proliferating cells after 4 h (70% of control) and 48 h (84%) exposure to NPs. In non-cytotoxic concentrations, in vitro assessment of the immunotoxic effects displayed moderate but significant suppression of proliferative activity of T-lymphocytes and T-dependent B-cell response in cultures stimulated with PWM In non-cytotoxic concentrations, in vitro assessment of the immunotoxic effects displayed moderate but significant suppression of proliferative activity of T-lymphocytes and T-dependent B-cell response in cultures stimulated with PWM > CON A, and no changes in PHA cultures.gt; CON A, and no changes in PHA cultures. Decrease in proliferative function was the most significant in T-cells stimulated with CD3 antigen (up to 84%). Cytotoxicity of natural killer cells was suppressed moderately (92%) but significantly in middle-dosed cultures (4 h exposure). On the other hand, in low PLGA-PEO NPs dosed cultures, significant stimulation of phagocytic activity of granulocytes (119%) > monocytes (117%) and respiratory burst of phagocytes (122%) was recorded. Genotoxicity assessment revealed no increase in the number of micronucleated binucleated cells and no induction of SBs or oxidised DNA bases in PLGA-PEO-treated cells. To conclude on immuno- and genotoxicity of PLGA-PEO NPs, more experiments with various particle size, charge and composition need to be done.
=>密室, 細胞, 電池, 独房・細胞, 監房, 組織, 独房
Overview of noun cell
The noun cell has 7 senses (first 3 from tagged texts)
1. (71) cell -- (any small compartment; "the cells of a honeycomb")
2. (44) cell -- ((biology) the basic structural and functional unit of all organisms; they may exist
as independent units of life (as in monads) or may form colonies or tissues as in higher plants and
animals)
3. (1) cell, electric cell -- (a device that delivers an electric current as the result of a
chemical reaction)
4. cell, cadre -- (a small unit serving as part of or as the nucleus of a larger political movement)
5. cellular telephone, cellular phone, cellphone, cell, mobile phone -- (a hand-held mobile
radiotelephone for use in an area divided into small sections, each with its own short-range
transmitter/receiver)
6. cell, cubicle -- (small room in which a monk or nun lives)
7. cell, jail cell, prison cell -- (a room where a prisoner is kept)
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