Functionalisation of calcium phosphate nanoparticles by oligonucleotides and their application for gene silencing

2007 ◽  
Vol 17 (8) ◽  
pp. 721-727 ◽  
Author(s):  
Viktoriya Sokolova ◽  
Anna Kovtun ◽  
Oleg Prymak ◽  
Wolfgang Meyer-Zaika ◽  
Elena A. Kubareva ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Gene Silencing ◽  
Calcium Phosphate Nanoparticles

scholarly journals Gene silencing of the pro-inflammatory cytokine TNF-α with siRNA delivered by calcium phosphate nanoparticles, quantified by different methods

2015 ◽  
Vol 3 (36) ◽  
pp. 7186-7193 ◽  
Author(s):  
Bernhard Neuhaus ◽  
Annika Frede ◽  
Astrid Maria Westendorf ◽  
Matthias Epple
Keyword(s):  
Calcium Phosphate ◽  
Gene Silencing ◽  
Proinflammatory Cytokine ◽  
Inflammatory Cytokine ◽  
Inflammatory Reactions ◽  
Tnf Α ◽  
Calcium Phosphate Nanoparticles

The expression of the proinflammatory cytokine TNF-α was efficiently downregulated with nanoparticles, opening a way to combat inflammatory reactions.

scholarly journals Calcium phosphate phase transition in the presence of Aminosilane

2014 ◽  
Vol 70 (a1) ◽  
pp. C67-C67
Author(s):  
Babak Mostaghaci ◽  
Brigitta Loretz ◽  
Robert Haberkorn ◽  
Guido Kickelbick ◽  
Claus-Michael Lehr
Keyword(s):  
Phase Transition ◽  
Calcium Phosphate ◽  
Blood Compatibility ◽  
Transfection Efficiency ◽  
Hek293 Cells ◽  
Step Method ◽  
Calcium Phosphate Nanoparticles ◽  
Amine Groups ◽  
The Impact

Calcium phosphate has been the point of interest for in vitro gene delivery for many years because of its biocompatibility and straight forward application. However, there are some limitations regarding in vivo administration of these particles mostly because of vast agglomeration of the particles and lack of strong bond between the particles and pDNA. We introduced a simple single step method to functionalize calcium phosphate nanoparticles with Aminosilanes having a different number of amine groups. The nanoparticles were characterized chemically and structurally and their toxicity and interaction with pDNA were studied as well. Results revealed that different crystalline phase of calcium phosphate nanoparticles (Brushite and Hydroxyapatite) with a size below 150 nm were prepared, depending on conditions of synthesis and phase, each with a narrow size distribution. The aminosilane agents caused oriented nucleation and growth of crystallites and can decrease the pH for producing hydroxyapatite phase. The phenomenon could be revealed with the presence of anisotropy in the structure of synthesized hydroxyapatite. The number of amine groups in the Aminosilane agent could change the phase transition pH. Brushite particles revealed to have stronger interaction with pDNA mostly because of their higher positive surface charge. Both particles showed blood compatibility and negligible toxicity. Transfection experiment revealed the capability of both brushite and hydroxyapatite particles to transfect A549 and HEK293 cells. The new modified nanoparticles can be stored in a dried state and re-dispersed easily at the time of administration. Moreover, the transfection efficiency is higher in comparison with conventional calcium phosphate. This study showed the impact of presence and type of the modifying agent on the crystal structure and the amount of surface functionalization of nanoparticles, which in consequence influenced their interaction with cells.

Transfection of cells with custom-made calcium phosphate nanoparticles coated with DNA

2004 ◽  
Vol 14 (14) ◽  
pp. 2213 ◽  
Author(s):  
T. Welzel ◽  
I. Radtke ◽  
W. Meyer-Zaika ◽  
R. Heumann ◽  
M. Epple
Keyword(s):  
Calcium Phosphate ◽  
Custom Made ◽  
Calcium Phosphate Nanoparticles

scholarly journals Urea-Doped Calcium Phosphate Nanoparticles as Sustainable Nitrogen Nanofertilizers for Viticulture: Implications on Yield and Quality of Pinot Gris Grapevines

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1026
Author(s):  
Federica Gaiotti ◽  
Marco Lucchetta ◽  
Giacomo Rodegher ◽  
Daniel Lorenzoni ◽  
Edoardo Longo ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Nitrogen Source ◽  
Foliar Application ◽  
N Fertilization ◽  
Plant Nitrogen ◽  
Yield And Quality ◽  
Berry Quality ◽  
Potential Benefits ◽  
Calcium Phosphate Nanoparticles

In recent years, the application of nanotechnology for the development of new “smart fertilizers” is regarded as one of the most promising solutions for boosting a more sustainable and modern grapevine cultivation. Despite showing interesting potential benefits over conventional fertilization practices, the use of nanofertilizers in viticulture is still underexplored. In this work, we investigated the effectiveness of non-toxic calcium phosphate nanoparticles (Ca3(PO4)2∙nH2O) doped with urea (U-ACP) as a nitrogen source for grapevine fertilization. Plant tests were performed for two years (2019–2020) on potted adult Pinot gris cv. vines grown under semi-controlled conditions. Four fertilization treatments were compared: N1: commercial granular fertilization (45 kg N ha−1); N2: U-ACP applied in fertigation (36 kg N ha−1); N3: foliar application of U-ACP (36 kg N ha−1); C: control, receiving no N fertilization. Plant nitrogen status (SPAD), yield parameters as well as those of berry quality were analyzed. Results here presented clearly show the capability of vine plants to recognize and use the nitrogen supplied with U-ACP nanoparticles either when applied foliarly or to the soil. Moreover, all of the quali–quantitative parameters measured in vine plants fed with nanoparticles were perfectly comparable to those of plants grown in conventional condition, despite the restrained dosage of nitrogen applied with the nanoparticles. Therefore, these results provide both clear evidence of the efficacy of U-ACP nanoparticles as a nitrogen source and the basis for the development of alternative nitrogen fertilization strategies, optimizing the dosage/benefit ratio and being particularly interesting in a context of a more sustainable and modern viticulture.

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