The nanomorphology of cell surfaces of adhered osteoblasts

• Christian Voelkner,
• Mirco Wendt,
• Regina Lange,
• Max Ulbrich,
• Martina Gruening,
• Susanne Staehlke,
• Barbara Nebe,
• Ingo Barke and
• Sylvia Speller

Beilstein J. Nanotechnol. 2021, 12, 242–256, doi:10.3762/bjnano.12.20

• coatings of positively charged plasma-polymerized allylamine (PPAAm) or negatively charged Au were used, see below. Viability tests (MTS) were performed on glass, sputter-deposited Au, polydimethylsiloxane (PDMS), and PPAAm coating with native titanium and cell culture plastic as reference. Cell viability

• adhering directly across the border between Au and glass, the cells apparently exhibited no preference. Cell culture For the SICM experiments, human osteoblast-like cells of the cell line MG-63 (American Type Culture Collection ATCC®, CRL1427™, Bethesda, USA) were used. This cell line has been successfully

Imaging of SARS-CoV-2 infected Vero E6 cells by helium ion microscopy

• Natalie Frese,
• Patrick Schmerer,
• Martin Wortmann,
• Matthias Schürmann,
• Matthias König,
• Michael Westphal,
• Friedemann Weber,
• Holger Sudhoff and
• Armin Gölzhäuser

Beilstein J. Nanotechnol. 2021, 12, 172–179, doi:10.3762/bjnano.12.13

• monolayers were infected with SARS-CoV-2 at a multiplicity of infection (MOI) of approximately 1 or mock-infected using cell culture medium. Following an incubation period of 18 h in a cell culture incubator (37 °C), cells were washed with 0.1 M sodium cacodylate (NaCac, pH 7.4) and fixed in 2% (v/v

A review on the green and sustainable synthesis of silver nanoparticles and one-dimensional silver nanostructures

• Sina Kaabipour and
• Shohreh Hemmati

Beilstein J. Nanotechnol. 2021, 12, 102–136, doi:10.3762/bjnano.12.9

• synthesis of AgNPs, as they can accumulate Ag atoms on the cell walls [104]. The bacteriogenic synthesis process can be either extracellular or intracellular. AgNPs are synthesized either by the biomass [267] or the cell culture supernatant [259]. AgNPs synthesized using bacteriogenic pathogens are commonly

• amides corresponding to cellular proteins and enzymes, are responsible for the synthesis and stabilization of AgNPs (Table 2). These components are present in both the biomass and the cell culture supernatant. It was previously demonstrated that the synthesis rate can be faster for some bacterial strains

• including Escherichia coli (E. coli) and K. Pneumonia when the cell culture supernatant is used [268]. However, the main downside of bacteriogenic synthesis is the slow synthesis rate and large size distribution compared to other green methods [104][259]. The applications of bacteria-synthesized AgNPs can

Effect of different silica coatings on the toxicity of upconversion nanoparticles on RAW 264.7 macrophage cells

• Cynthia Kembuan,
• Helena Oliveira and
• Christina Graf

Beilstein J. Nanotechnol. 2021, 12, 35–48, doi:10.3762/bjnano.12.3

• inductively coupled plasma optical emission spectrometry (ICP-OES). Before the cell experiments, the stability of the particles in cell culture media was investigated via DLS and ELS. The cytotoxicity of the UCNPs was determined by MTT assays and cell cycle analysis. The UCNP uptake potential was evaluated by

• -functionalized particles is small enough for the particles to be internalized via the endocytic uptake [51]. (3-Aminopropyl)trimethoxysilane (APS) was not chosen as the amine ligand due to the increased aggregation of APS-functionalized particles in the cell culture medium [51]. In addition, particles with a

• ionic strength of the cell culture medium (I = 168 mmol/L) reduces the electrostatic stabilization. Besides, the proteins in the DMEM cell culture medium supplemented with 10% FBS contribute to the measured hydrodynamic diameter values [51]. FBS consists mostly of bovine serum albumin. The Z-average

PEG/PEI-functionalized single-walled carbon nanotubes as delivery carriers for doxorubicin: synthesis, characterization, and in vitro evaluation

• Shuoye Yang,
• Zhenwei Wang,
• Yahong Ping,
• Yuying Miao,
• Yongmei Xiao,
• Lingbo Qu,
• Lu Zhang,
• Yuansen Hu and
• Jinshui Wang

Beilstein J. Nanotechnol. 2020, 11, 1728–1741, doi:10.3762/bjnano.11.155

• . Polyethyleneimine (PEI, Mw = 600 Da) was purchased from Aladdin Chemistry Co., Ltd. Doxorubicin hydrochloride (DOX) was purchased from Dalian Meilun Biological Technology Co., Ltd (Dalian, China). Cell culture medium RPMI 1640, fetal bovine serum (FBS), penicillin/streptomycin solution and fluorescent Hoechst 33342

• grade. Cell culture The human breast cancer cell line MCF-7 used in this study was obtained from American Type Culture Collection (ATCC, Manassas, VA), and cultured in RPMI 1640 medium containing 10% (v/v) fetal bovine serum (FBS) and 1% penicillin–streptomycin at 37 °C in a humidified atmosphere with 5

Cardiomyocyte uptake mechanism of a hydroxyapatite nanoparticle mediated gene delivery system

• Hiroaki Komuro,
• Masahiro Yamazoe,
• Kosuke Nozaki,
• Akiko Nagai and
• Tetsuo Sasano

Beilstein J. Nanotechnol. 2020, 11, 1685–1692, doi:10.3762/bjnano.11.150

• of 75 kV. The particle size distribution of the HAp nanoparticles was measured via NTA (NanoSight NS10, Malvern). Cell culture HL-1 is a cell line derived from mouse atrial myocytes, which was originally isolated and characterized by Dr. Claycomb (University of Louisiana) [39]. HL-1 cells (murine

• cardiomyocytes) were seeded and grown in Claycomb culture medium (Sigma) supplemented with 10% of fetal bovine serum (Sigma), 0.1 mM of norepinephrine (Sigma), 2 mM of ʟ-glutamine (Wako), and 1% of penicillin/streptomycin (Gibco) as previously published [39]. All cell culture dishes and plates were coated with a

Antimicrobial metal-based nanoparticles: a review on their synthesis, types and antimicrobial action

• Matías Guerrero Correa,
• Fernanda B. Martínez,
• Cristian Patiño Vidal,
• Camilo Streitt,
• Juan Escrig and
• Carol Lopez de Dicastillo

Beilstein J. Nanotechnol. 2020, 11, 1450–1469, doi:10.3762/bjnano.11.129

• , eliminating an additional step to prevent particle aggregation [86]. In addition, cell culture procedures are not necessary in this case, which allows for the large-scale synthesis of nanoparticles in a non-aseptic environment [87]. Furthermore, plant-based processes are cost-effective and safe for humans and

Applications of superparamagnetic iron oxide nanoparticles in drug and therapeutic delivery, and biotechnological advancements

• Maria Suciu,
• Corina M. Ionescu,
• Alexandra Ciorita,
• Septimiu C. Tripon,
• Dragos Nica,
• Hani Al-Salami and
• Lucian Barbu-Tudoran

Beilstein J. Nanotechnol. 2020, 11, 1092–1109, doi:10.3762/bjnano.11.94

• increase in macrophages. The general consideration is that polymer coating offers colloidal stability, but in fact PVA-coated SPIONs are only stable in water at a certain pH value. In cell culture medium they agglomerate. Studies showed that the components of the medium, and not the calf serum added to the

• medium, led to nanoparticle agglomeration. Dulbecco's Modified Eagle Medium (DMEM) with added serum yielded the highest nanoparticle stability compared to other media [54][87]. Also, PVA-coated SPIONs were not internalized by cells when the cell culture medium had serum in it. Without serum cell uptake

• stability in cell culture media, it was demonstrated that poly(methacrylic acid)-coated SPIONs and citric acid-coated SPIONs are stable in common cell culture media (DMEM, RPMI), when serum was added, but produced aggregates larger than 1 µm in simple media and in phosphate buffer [54]. Stability and

Examination of the relationship between viscoelastic properties and the invasion of ovarian cancer cells by atomic force microscopy

• Mengdan Chen,
• Jinshu Zeng,
• Weiwei Ruan,
• Zhenghong Zhang,
• Yuhua Wang,
• Shusen Xie,
• Zhengchao Wang and
• Hongqin Yang

Beilstein J. Nanotechnol. 2020, 11, 568–582, doi:10.3762/bjnano.11.45

• during very early diagnosis of cancer at the level of single living cells. Experimental Cell culture Three ovarian cell lines, HOSEpiC (human ovarian epithelial cell line, BeNa Culture Collection, Beijing, China), OVCAR-3 (human cancerous ovarian cell line, BeNa Culture Collection, Beijing, China) and HO

• cells was analyzed by cell culture insert (Corning, 8.0 μm pore size) coated with a PET membrane according to the instructions of the manufacturer. A total of 1 × 104 cells suspended in 500 µL serum-free medium was loaded into the upper chambers, and the bottom chamber was filled with 500 μL medium

Interactions at the cell membrane and pathways of internalization of nano-sized materials for nanomedicine

• Valentina Francia,
• Daphne Montizaan and
• Anna Salvati

Beilstein J. Nanotechnol. 2020, 11, 338–353, doi:10.3762/bjnano.11.25

• uptake. For such studies, the nanoparticle dispersion, the cell culture conditions, the cell line investigated, and the methods used to characterize the uptake mechanisms are all crucial. Unfortunately, there are often no agreements on how to perform uptake studies in a standardized way. Recently, this

Phase inversion-based nanoemulsions of medium chain triglyceride as potential drug delivery system for parenteral applications

• Eike Folker Busmann,
• Dailén García Martínez,
• Henrike Lucas and
• Karsten Mäder

Beilstein J. Nanotechnol. 2020, 11, 213–224, doi:10.3762/bjnano.11.16

• triglyceride) was provided by Hansen & Rosenthal KG (Hamburg, Germany). Kolliphor HS 15 (macrogol 15 hydroxystearate) was provided by BASF SE (Ludwigshafen, Germany). Sodium chloride was purchased from Grüssing GmbH (Filsum, Germany), the components for the cell culture medium Dulbecco’s Modified Eagle Medium

• guidelines Q1A. Toxicity on NHDF and 3T3 cells Approximately 20,000 NHDF cells and 10,000 3T3 cells were seeded in 96 well plates and grown for 24 h at 37 °C and 5% CO2 in 100 µL of the corresponding cell culture media shown in Table 3. After adding 50 µL aseptic and 0.2 µm of the sterile, filtered and

• . The values in brackets refer to the concentration of MCT + Kolliphor HS15 in NE25, NE50 and NE100. Composition of the cell culture media. Supporting Information Supporting Information File 2: Additional figures.

Internalization mechanisms of cell-penetrating peptides

• Ivana Ruseska and
• Andreas Zimmer

Beilstein J. Nanotechnol. 2020, 11, 101–123, doi:10.3762/bjnano.11.10

• contrast to the common cationic CPPs, Arukuusk et al. [88] suggest negatively charged CPPs as oligonucleotide carriers. The CPPs are not inherently anionic, but confer a negative charge after they are complexed with a nucleic acid in cell culture media. The group has already demonstrated that the uptake of

The different ways to chitosan/hyaluronic acid nanoparticles: templated vs direct complexation. Influence of particle preparation on morphology, cell uptake and silencing efficiency

• Arianna Gennari,
• Julio M. Rios de la Rosa,
• Erwin Hohn,
• Maria Pelliccia,
• Enrique Lallana,
• Roberto Donno,
• Annalisa Tirella and
• Nicola Tirelli

Beilstein J. Nanotechnol. 2019, 10, 2594–2608, doi:10.3762/bjnano.10.250

• images were analysed using ImageJ software (v1.49p, http://rsb.info.nih.gov/ij). Cell studies HCT-116 and RAW 264.7 cell lines were cultured in complete media (McCoy’s 5A or high glucose DMEM, respectively) under standard conditions for cell culture (5% v/v CO2 in air, 37 °C). Further details of the

• materials used is provided in Supporting Information File 1, Section SI1.1.2. Preparation of double-concentrated cell culture growth media. 5.95 g McCoy’s 5A powder or 6.75 g of DMEM powder, respectively, were dissolved in 175 mL of distilled water followed by addition of 3 g of HEPES. The pH value was then

Fully amino acid-based hydrogel as potential scaffold for cell culturing and drug delivery

• Dávid Juriga,
• Evelin Sipos,
• Orsolya Hegedűs,
• Gábor Varga,
• Miklós Zrínyi,
• Krisztina S. Nagy and
• Angéla Jedlovszky-Hajdú

Beilstein J. Nanotechnol. 2019, 10, 2579–2593, doi:10.3762/bjnano.10.249

• Institutional Committee of Science and Research Ethics. The number of the ethical permission is: 17458/2012/EKU. After extraction, the teeth were immediately placed into a sterile cell culture medium. The viable periodontal fibers were removed from the tooth surface, put into a sterile box with a sterile blade

• serum (FBS, Gibco, USA), 2 mM ʟ-glutamine (Gibco, USA), 100 units/mL penicillin and 100 mg/mL streptomycin (Gibco, USA). When the cell culture became subconfluent, it was passaged at a ratio of 1:20 using a 0.05% trypsin/EDTA solution. Cell viability assay Before performing the cell viability assay, the

Bombesin receptor-targeted liposomes for enhanced delivery to lung cancer cells

• Mohammad J. Akbar,
• Pâmela C. Lukasewicz Ferreira,
• Melania Giorgetti,
• Leanne Stokes and
• Christopher J. Morris

Beilstein J. Nanotechnol. 2019, 10, 2553–2562, doi:10.3762/bjnano.10.246

• therapeutic outcomes. Experimental Materials Fmoc-protected amino acids, piperazine, HCTU, HOBt, DMF were all from AGTC (Hessle, UK). Rink Amide MBHA resin was from Novabiochem (UK). HPLC solvents and all cell culture media were from Sigma-Aldrich (Poole, UK). Lipids were from Avanti Polar Lipids (USA

• . Samples were incubated at 4, 25 or 37 °C. After 0, 24 and 72 hours the samples were transferred to cuvettes and measured for size and PDI as described above. Cell culture and transfection The adherent, non-small cell cancer cell line A549 was stably transfected with a plasmid encoding HA epitope-tagged

Small protein sequences can induce cellular uptake of complex nanohybrids

• Jan-Philip Merkl,
• Malak Safi,
• Christian Schmidtke,
• Fadi Aldeek,
• Johannes Ostermann,
• Tatiana Domitrovic,
• Sebastian Gärtner,
• John E. Johnson,
• Horst Weller and
• Hedi Mattoussi

Beilstein J. Nanotechnol. 2019, 10, 2477–2482, doi:10.3762/bjnano.10.238

• consisting of 100 nM QD solution, 2 equivalents of LA-ZW-AuNP per QD and 14 equivalents His6-MBP-γ per AuNPs, were incubated with the cell culture for 1 h. Following rinsing the culture was imaged using epifluorescence and confocal fluorescence microscopy. A pronounced intracellular uptake of the hybrids was

pH-Controlled fluorescence switching in water-dispersed polymer brushes grafted to modified boron nitride nanotubes for cellular imaging

• Saban Kalay,
• Yurij Stetsyshyn,
• Volodymyr Donchak,
• Khrystyna Harhay,
• Ostap Lishchynskyi,
• Halyna Ohar,
• Yuriy Panchenko,
• Stanislav Voronov and
• Mustafa Çulha

Beilstein J. Nanotechnol. 2019, 10, 2428–2439, doi:10.3762/bjnano.10.233

• obtained with a Carl Zeiss Evo-40 instrument under high vacuum and accelerating voltage of 10 kV. Cell culture experiments Normal prostate epithelium (PNT1A) and human prostate cancer (DU145) cell lines were grown in Dulbecco’s Modified Eagle’s Medium, supplemented with 10% fetal bovine serum and 1

Atomic force acoustic microscopy reveals the influence of substrate stiffness and topography on cell behavior

• Yan Liu,
• Li Li,
• Xing Chen,
• Ying Wang,
• Meng-Nan Liu,
• Jin Yan,
• Liang Cao,
• Lu Wang and
• Zuo-Bin Wang

Beilstein J. Nanotechnol. 2019, 10, 2329–2337, doi:10.3762/bjnano.10.223

• SU-8 photoresist films as the substrate and generated local changes in the stiffness and the nanopattern topography on the surface. The SU-8 photoresist has been used as the material for biosensors in living tissues [24] and cell culture molds in vitro due to its excellent biocompatibility [16] and

• frequency of 1 Hz for surface roughness measurements. Cell culture The L929 cells from the mouse fibroblast cell line were cultured at 37 °C in a minimal essential medium (MEM, Solarbio) supplemented with 10% fetal bovine serum. Before seeding, the SU-8 substrates and the reference glass substrate were

• placed into a 100 mm cell culture well. After sterilization for 1 h with ultraviolet light, the substrates were rinsed thrice with phosphate-buffered saline (PBS) and once with the cell-culture medium. Then, the cells (approximately 1 × 105 cells·mL−1) were seeded on the fabricated SU-8 substrates and

Design of a nanostructured mucoadhesive system containing curcumin for buccal application: from physicochemical to biological aspects

• Sabrina Barbosa de Souza Ferreira,
• Gustavo Braga,
• Évelin Lemos Oliveira,
• Jéssica Bassi da Silva,
• Hélen Cássia Rosseto,
• Lidiane Vizioli de Castro Hoshino,
• Mauro Luciano Baesso,
• Wilker Caetano,
• Craig Murdoch,
• Helen Elizabeth Colley and
• Marcos Luciano Bruschi

Beilstein J. Nanotechnol. 2019, 10, 2304–2328, doi:10.3762/bjnano.10.222

• incorporated into the formulation but decreased cytotoxic effects in healthy cells. Therefore, the nanostructured system demonstrated promising results due to the selectivity towards cancer cells in a monolayer cell culture in addition to exhibiting excellent physicochemical properties. Hence, further activity

Mannosylated brush copolymers based on poly(ethylene glycol) and poly(ε-caprolactone) as multivalent lectin-binding nanomaterials

• Stefania Ordanini,
• Wanda Celentano,
• Anna Bernardi and
• Francesco Cellesi

Beilstein J. Nanotechnol. 2019, 10, 2192–2206, doi:10.3762/bjnano.10.212

• in many FDA-approved products [19]. PCL repeating units are constituted by five non-polar methylene groups and one labile ester group. It was reported that biodegradability and performance of PCL in cell culture studies are enhanced when it is modified with PEG [20]. PEG is a hydrophilic nontoxic

Incorporation of doxorubicin in different polymer nanoparticles and their anticancer activity

• Sebastian Pieper,
• Hannah Onafuye,
• Dennis Mulac,
• Jindrich Cinatl Jr.,
• Mark N. Wass,
• Martin Michaelis and
• Klaus Langer

Beilstein J. Nanotechnol. 2019, 10, 2062–2072, doi:10.3762/bjnano.10.201

• adjustment (Figure 6). Hence, PLGA nanoparticles prepared at pH 7 with 5 mg doxorubicin were selected for cell culture experiments. The different release kinetics from PLGA nanoparticles prepared at pH 7, may be attributed to the higher lipophilicity of doxorubicin at this pH value and, in turn, a stronger

• such as nanoparticles or micelles with doxorubicin covalently bound to the polymer, nanoparticles produced by nanoprecipitation, micelles based on multi-arm star-shaped PLGA–PEG block copolymers, or nanopolymersomes [14][15][16][17][18]. Nanoparticle efficacy in cell culture Finally, the effects of

• centrifugation step (30,000g, 10 min) the supernatant was analysed for the amount of released doxorubicin by HPLC as mentioned above. Additionally, the resulting pellet was dissolved in DMSO in order to calculate doxorubicin recovery. Cell culture The MYCN-amplified neuroblastoma cell line UKF-NB-3 was

Gold-coated plant virus as computed tomography imaging contrast agent

• Alaa A. A. Aljabali,
• Mazhar S. Al Zoubi,
• Khalid M. Al-Batanyeh,
• Ali Al-Radaideh,
• Mohammad A. Obeid,
• Abeer Al Sharabi,
• Walhan Alshaer,
• Bayan AbuFares,
• Tasnim Al-Zanati,
• Murtaza M. Tambuwala,
• Naveed Akbar and
• David J. Evans

Beilstein J. Nanotechnol. 2019, 10, 1983–1993, doi:10.3762/bjnano.10.195

• -hydroxysulfosuccinimide (sulfo-NHS), bicinchoninic acid (BCA) protein assay kit, RPMI, foetal calf serum, and T125 mm tissue culture flasks were purchased from ThermoFisher Scientific; EGM-2 medium was purchased from Lonza. Cell culture medium phenol red-free (high-glucose Dulbecco modified eagle medium (DMEM

• consequence of the reduction of Cu2+ to Cu+ and, thus, an indicator of the presence of protein. Murine macrophage (RAW264.7) Cell culture: A mouse monocyte/macrophage cell line (RAW264.7), was purchased from American Type Culture Collection (ATCC; Manassas, VA). RAW264.7 cells were plated in T125 mm tissue

Preservation of rutin nanosuspensions without the use of preservatives

• Pascal L. Stahr and
• Cornelia M. Keck

Beilstein J. Nanotechnol. 2019, 10, 1902–1913, doi:10.3762/bjnano.10.185

• be prepared shortly before the experiments, i.e., assays, cell culture or in vivo studies, are performed. Any repeating of the tests or continued tests will require the production of new suspensions, which might possess slightly different properties, which in turn might then cause differences in the

Nanoarchitectonics meets cell surface engineering: shape recognition of human cells by halloysite-doped silica cell imprints

• Elvira Rozhina,
• Ilnur Ishmukhametov,
• Svetlana Batasheva,
• Farida Akhatova and
• Rawil Fakhrullin

Beilstein J. Nanotechnol. 2019, 10, 1818–1825, doi:10.3762/bjnano.10.176

• evaluation experiments. First, we tried to cultivate the cells in a regular way (24 h) by seeding them onto cell culture plates. Uncovered HeLa cells, as expected, were able to adhere and subsequently colonise the substrates (Figure 3A,B), whereas the cells decorated with halloysite-doped silica shells did

• were obtained from Applied Minerals Inc. Cell culture The human cervical carcinoma (HeLa) CCL-2 cell line was obtained from the American Type Culture Collection (ATCC, USA).The cells were cultured under standard culture conditions (5% CO2 at 37 °C) in Dulbecco’s modified Eagle’s medium (DMEM

Toxicity and safety study of silver and gold nanoparticles functionalized with cysteine and glutathione

• Barbara Pem,
• Igor M. Pongrac,
• Lea Ulm,
• Ivan Pavičić,
• Valerije Vrček,
• Darija Domazet Jurašin,
• Marija Ljubojević,
• Adela Krivohlavek and
• Ivana Vinković Vrček

Beilstein J. Nanotechnol. 2019, 10, 1802–1817, doi:10.3762/bjnano.10.175

• concentration of 25 mg Ag L−1 would release only 0.2 mg Ag+ L−1 in the cell culture media, the concentration of ionic Ag that is non-toxic to L929 cells. Thus, the toxicity mechanism is much more complicated than a simple metal ion release in cell culture media. The cellular internalization of NPs by active

• account the results published on the L929 cell line (Table S3 in Supporting Information File 1). As AuNPs demonstrated to be resistant to dissolution behavior in cell culture media, the increased toxicity of GSH-AgNPs may originate from the possible catalytic role of GSH on the dissolution process on the

• ). The dissolution behavior of AuNPs and AgNPs was tested by ultrafiltration followed by quantification of released free gold or silver ions. The test media were UPW, cell culture medium EMEM with the addition of 10% FBS, and standard culture media for Daphnia magna cultivation (SCM). Freshly prepared