Study of cytotoxicity performance of carbon nanohorns by method of spin probes

Kartel, N. T.; Іванов, Л. В.; Lyapunov, A. N.; Cherkashina, Ya. O.; Flahaut, Emmanuel; Gurova, Olga A.; Окотруб, А. В.

doi:10.1080/1536383x.2020.1757656

Cited by 3 publications

(4 citation statements)

References 26 publications

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“…As the toluene content increases from 2.4 to 8.0 mL, the intensities of these peaks increase significantly. The spectra of oxidized CNHs reveal enhancement of the intensity of the O–H, C–O and C=O stretching bands indicating functionalization of nanohorns with hydroxyl and carboxyl groups and the presence of adsorbed water molecules [ 16 ]. The new peaks appeared between 1630 and 1690 cm −1 could be related to the oscillation of O–H bands or to the C=O stretching bands of quinone groups.…”

Section: Resultsmentioning

confidence: 99%

“…During the synthesis, the CNHs are combined into spherical particles, which can form large van der Waals associates [ 1 , 2 , 3 , 4 , 5 ]. High pore volume [ 6 , 7 , 8 ] and specific surface area (SSA) [ 9 , 10 ] make CNHs very promising for nanofluids [ 11 , 12 ], catalysis [ 13 , 14 ], medicine [ 15 , 16 , 17 , 18 ], electrochemistry [ 9 , 19 ], electromagnetic [ 2 , 5 , 20 ] and sensing applications [ 6 , 21 , 22 ]. In this regard, the improvement of availability of their pores for guest species, the increase of the SSA value, and the enhancement of the stability of their suspensions become very important.…”

Section: Introductionmentioning

confidence: 99%

“…Similarly for carbon nanotubes, oxidation is the most studied method of chemical modification of CNHs [ 3 , 15 , 23 , 24 ]. The treatment of CNHs with acids [ 15 , 16 , 25 , 26 ] and heating in a presence of oxygen [ 9 , 12 , 22 , 27 , 28 , 29 ] could etch endcaps of nanohorns or/and open nanowindows in their walls resulting in a significant increase of the SSA value ( ca. 2.6 and 4 times, respectively [ 30 ]).…”

Section: Introductionmentioning

confidence: 99%

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Effect of Toluene Addition in an Electric Arc on Morphology, Surface Modification, and Oxidation Behavior of Carbon Nanohorns and Their Sedimentation in Water

et al. 2021

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Carbon nanohorns (CNHs) are attractive for various applications, where a high specific surface area and long dispersion stability in water are important. In the present work, we study these parameters of CNHs prepared by arc evaporation of graphite depending on the conditions of the synthesis and subsequent oxidation in air. It is shown that the addition of toluene in the reactor during the arcing allows obtaining CNHs functionalized with −CHx groups. Heating of CNHs in air at 400 °C leads to substitution of −CHx groups for oxygen-containing groups. Moreover, the CNH endcaps are opened at 500 °C, and as a result, the specific surface area of CNHs increases 4 times. Aqueous suspensions with a concentration of oxidized CNHs of 100 µg/mL are stable for 8 months.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Toluene Addition in an Electric Arc on Morphology, Surface Modification, and Oxidation Behavior of Carbon Nanohorns and Their Sedimentation in Water

et al. 2021

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“…The study conducted by He et al 8 also indicated that the internalization of CNH in macrophages via phagocytosis presented a lower membrane disturbance compared to CNT. Based on the electron paramagnetic resonance (EPR) spectra using a spin probe technique, Kartel et al 22 described that the interaction of CNHox with erythrocytes of rats caused disorders in the outer leaflet of the lipid bilayers, as well as an increase of polarity in this microenvironment.…”

Section: Introductionmentioning

confidence: 99%

Modeling the Cellular Uptake of Functionalized Carbon Nanohorns Loaded with Cisplatin through a Breast Cancer Cell Membrane

Almeida,

Goliatt,

Dos Santos

et al. 2023

Mol. Pharmaceutics

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The cisplatin encapsulation into carbon nanohorns (CNH) is a promising nanoformulation to circumvent the drug dissipation and to specifically accumulate it in tumor sites. Herein, biased molecular dynamics simulations were used to analyze the transmembrane transport of the CNH loaded with cisplatin through a breast cancer cell membrane prototype. The simulations revealed a four-stage mechanism: approach, insertion, permeation, and internalization. Despite the lowest structural disturbance of the membrane provided by the nanocarrier, the average free energy barrier for the translocation was 55.2 kcal mol −1 , suggesting that the passive process is kinetically unfavorable. In contrast, the free energy profiles revealed potential wells of −6.8 kcal mol −1 along the insertion stage in the polar heads region of the membrane, which might enhance the retention of the drug in tumor sites; therefore, the most likely cisplatin delivery mechanism should involve the adsorption and retention of CNH on the surface of cancer cells, allowing the loaded cisplatin be slowly released and passively transported through the cell membrane.

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Exposure Pathways and Toxicity of Fullerenes

Liu¹

2023

HSET

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Fullerenes have become very popular nowadays in the field of cosmetic and medicine as “radical sponge” because of their high antioxidant activities. However, there are worries about the toxicity of fullerenes due to their special chemical properties and good ability to enter the human body. In this article, it is found that fullerenes have been proved to have the ability to enter animal body through skin penetration, peroral administration and pulmonary absorption beside initiative injection. The potential mechanism of fullerene toxicity is to interrupt the activation process of protein, cause mitochondrial dysfunction and generate ROS to damage organism. Nevertheless, the experiments result shows the negative effects of fullerenes only occur in a high dose and the assessments of fullerenes toxicity show a low result with the IC50 value and LD50 value to be 383.4 lg/mL to HEK293 and 721mg/kg to mice. It is suggested that fullerenes can rarely affect human health as long as people are exposed to the appropriate dose of fullerenes and the toxicity of fullerenes can further reduce via synthesis of fullerene derivates.

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Study of cytotoxicity performance of carbon nanohorns by method of spin probes

Abstract: Study of cytotoxicity performance of carbon nanohorns by method of spin probes. (2020) Fullerenes Nanotubes and Carbon Nanostructures, 28 (9). 1-8.

Cited by 3 publications

References 26 publications

Effect of Toluene Addition in an Electric Arc on Morphology, Surface Modification, and Oxidation Behavior of Carbon Nanohorns and Their Sedimentation in Water

Effect of Toluene Addition in an Electric Arc on Morphology, Surface Modification, and Oxidation Behavior of Carbon Nanohorns and Their Sedimentation in Water

Modeling the Cellular Uptake of Functionalized Carbon Nanohorns Loaded with Cisplatin through a Breast Cancer Cell Membrane

Exposure Pathways and Toxicity of Fullerenes

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