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Effects of dendritic core-shell glycoarchitectures on primary mesenchymal stem cells and osteoblasts obtained from different human donors.

Lautenschläger S, Striegler C, Dakischew O, Schütz I, Szalay G, Schnettler R, Heiß C, Appelhans D, Lips KS - J Nanobiotechnology (2015)

Bottom Line: In all experiments PEI-5k-Mal-B exhibits a superior biocompatibility compared to PEI-25k-Mal-B.Additionally, for all experiments, results are strongly influenced by a large donor-to-donor variability of the four different rdMSC samples.To summarize, while featuring a good cellular uptake, PEI-5k-Mal-B induces only minimal adverse effects and features clearly superior biocompatibility compared to the larger PEI-25k-Mal-B.

View Article: PubMed Central - PubMed

Affiliation: Laboratory for Experimental Trauma Surgery, Justus-Liebig-University Giessen, Schubertstr. 81, 35392, Giessen, Germany. Stefan.Lautenschlaeger@med.uni-giessen.de.

ABSTRACT
The biological impact of novel nano-scaled drug delivery vehicles in highly topical therapies of bone diseases have to be investigated in vitro before starting in vivo trials. Highly desired features for these materials are a good cellular uptake, large transport capacity for drugs and a good bio-compatibility. Essentially the latter has to be addressed as first point on the agenda. We present a study on the biological interaction of maltose-modified poly(ethyleneimine) (PEI-Mal) on primary human mesenchymal stem cell, harvested from reaming debris (rdMSC) and osteoblasts obtained from four different male donors. PEI-Mal-nanoparticles with two different molecular weights of the PEI core (5000 g/mol for PEI-5k-Mal-B and 25,000 g/mol for PEI-25k-Mal-B) have been administered to both cell lines. As well dose as incubation-time dependent effects and interactions have been researched for concentrations between 1 μg/ml to 1 mg/ml and periods of 24 h up to 28 days. Studies conducted by different methods of microscopy as light microscopy, fluorescence microscopy, transmission-electron-microscopy and quantitative assays (LDH and DC-protein) indicate as well a good cellular uptake of the nanoparticles as a particle- and concentration-dependent impact on the cellular macro- and micro-structure of the rdMSC samples. In all experiments PEI-5k-Mal-B exhibits a superior biocompatibility compared to PEI-25k-Mal-B. At higher concentrations PEI-25k-Mal-B is toxic and induces a directly observable mitochondrial damage. The alkaline phosphatase assay (ALP), has been conducted to check on the possible influence of nanoparticles on the differentiation capabilities of rdMSC to osteoblasts. In addition the production of mineralized matrix has been shown by von-Kossa stained samples. No influence of the nanoparticles on the ALP per cell has been detected. Additionally, for all experiments, results are strongly influenced by a large donor-to-donor variability of the four different rdMSC samples. To summarize, while featuring a good cellular uptake, PEI-5k-Mal-B induces only minimal adverse effects and features clearly superior biocompatibility compared to the larger PEI-25k-Mal-B.

No MeSH data available.


Related in: MedlinePlus

a Light microscopy images for long-term trials with endpoint 21 days. Compared to the reference especially the rdMSC treated with PEI-25k-MAL-B exhibit damaged cells and free floating cell debris, while rdMSC incubated with PEI-5k-Mal-B show less signs of damage. b Light microscopy images with higher magnification of cells treated with nanoparticles for 21 days. Especially PEI-25k-Mal-B results in large amounts of cellular debris (white structures) and damaged cells (arrows), while PEI-5k-Mal-B doesn’t harm cells in that way
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Fig9: a Light microscopy images for long-term trials with endpoint 21 days. Compared to the reference especially the rdMSC treated with PEI-25k-MAL-B exhibit damaged cells and free floating cell debris, while rdMSC incubated with PEI-5k-Mal-B show less signs of damage. b Light microscopy images with higher magnification of cells treated with nanoparticles for 21 days. Especially PEI-25k-Mal-B results in large amounts of cellular debris (white structures) and damaged cells (arrows), while PEI-5k-Mal-B doesn’t harm cells in that way

Mentions: Additionally, light microscopy images obtained from long-term trials after 21 days are shown in Fig. 9. The cells of the untreated reference rdMSC are vital and confluent cells. No signs of damage, reduced viability or distorted morphology can be found. In contrast to this reduced cell counts are observable for both nanoparticles, while for rdMSC treated with PEI-25k-Mal-B signs of cellular damage and death, as for example irregular nuclei, distorted cell shapes or free floating cell debris, can be detected. PEI-5k-Mal-B, in both concentrations, induces far less damage and cell debris.Fig. 9


Effects of dendritic core-shell glycoarchitectures on primary mesenchymal stem cells and osteoblasts obtained from different human donors.

Lautenschläger S, Striegler C, Dakischew O, Schütz I, Szalay G, Schnettler R, Heiß C, Appelhans D, Lips KS - J Nanobiotechnology (2015)

a Light microscopy images for long-term trials with endpoint 21 days. Compared to the reference especially the rdMSC treated with PEI-25k-MAL-B exhibit damaged cells and free floating cell debris, while rdMSC incubated with PEI-5k-Mal-B show less signs of damage. b Light microscopy images with higher magnification of cells treated with nanoparticles for 21 days. Especially PEI-25k-Mal-B results in large amounts of cellular debris (white structures) and damaged cells (arrows), while PEI-5k-Mal-B doesn’t harm cells in that way
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4597403&req=5

Fig9: a Light microscopy images for long-term trials with endpoint 21 days. Compared to the reference especially the rdMSC treated with PEI-25k-MAL-B exhibit damaged cells and free floating cell debris, while rdMSC incubated with PEI-5k-Mal-B show less signs of damage. b Light microscopy images with higher magnification of cells treated with nanoparticles for 21 days. Especially PEI-25k-Mal-B results in large amounts of cellular debris (white structures) and damaged cells (arrows), while PEI-5k-Mal-B doesn’t harm cells in that way
Mentions: Additionally, light microscopy images obtained from long-term trials after 21 days are shown in Fig. 9. The cells of the untreated reference rdMSC are vital and confluent cells. No signs of damage, reduced viability or distorted morphology can be found. In contrast to this reduced cell counts are observable for both nanoparticles, while for rdMSC treated with PEI-25k-Mal-B signs of cellular damage and death, as for example irregular nuclei, distorted cell shapes or free floating cell debris, can be detected. PEI-5k-Mal-B, in both concentrations, induces far less damage and cell debris.Fig. 9

Bottom Line: In all experiments PEI-5k-Mal-B exhibits a superior biocompatibility compared to PEI-25k-Mal-B.Additionally, for all experiments, results are strongly influenced by a large donor-to-donor variability of the four different rdMSC samples.To summarize, while featuring a good cellular uptake, PEI-5k-Mal-B induces only minimal adverse effects and features clearly superior biocompatibility compared to the larger PEI-25k-Mal-B.

View Article: PubMed Central - PubMed

Affiliation: Laboratory for Experimental Trauma Surgery, Justus-Liebig-University Giessen, Schubertstr. 81, 35392, Giessen, Germany. Stefan.Lautenschlaeger@med.uni-giessen.de.

ABSTRACT
The biological impact of novel nano-scaled drug delivery vehicles in highly topical therapies of bone diseases have to be investigated in vitro before starting in vivo trials. Highly desired features for these materials are a good cellular uptake, large transport capacity for drugs and a good bio-compatibility. Essentially the latter has to be addressed as first point on the agenda. We present a study on the biological interaction of maltose-modified poly(ethyleneimine) (PEI-Mal) on primary human mesenchymal stem cell, harvested from reaming debris (rdMSC) and osteoblasts obtained from four different male donors. PEI-Mal-nanoparticles with two different molecular weights of the PEI core (5000 g/mol for PEI-5k-Mal-B and 25,000 g/mol for PEI-25k-Mal-B) have been administered to both cell lines. As well dose as incubation-time dependent effects and interactions have been researched for concentrations between 1 μg/ml to 1 mg/ml and periods of 24 h up to 28 days. Studies conducted by different methods of microscopy as light microscopy, fluorescence microscopy, transmission-electron-microscopy and quantitative assays (LDH and DC-protein) indicate as well a good cellular uptake of the nanoparticles as a particle- and concentration-dependent impact on the cellular macro- and micro-structure of the rdMSC samples. In all experiments PEI-5k-Mal-B exhibits a superior biocompatibility compared to PEI-25k-Mal-B. At higher concentrations PEI-25k-Mal-B is toxic and induces a directly observable mitochondrial damage. The alkaline phosphatase assay (ALP), has been conducted to check on the possible influence of nanoparticles on the differentiation capabilities of rdMSC to osteoblasts. In addition the production of mineralized matrix has been shown by von-Kossa stained samples. No influence of the nanoparticles on the ALP per cell has been detected. Additionally, for all experiments, results are strongly influenced by a large donor-to-donor variability of the four different rdMSC samples. To summarize, while featuring a good cellular uptake, PEI-5k-Mal-B induces only minimal adverse effects and features clearly superior biocompatibility compared to the larger PEI-25k-Mal-B.

No MeSH data available.


Related in: MedlinePlus