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  1. Article: Amphiphilic Triazine-Phosphorus Metallodendrons Possessing Anti-Cancer Stem Cell Activity.

    Apartsin, Evgeny K / Knauer, Nadezhda / Kahlert, Ulf Dietrich / Caminade, Anne-Marie

    Pharmaceutics

    2022  Volume 14, Issue 2

    Abstract: Dendritic molecules bearing metal complexes in their structure (metallodendrimers and metallodendrons) are considered prospective therapeutic entities. In particular, metallodendrons raise interest as antitumor agents for the treatment of poorly curable ... ...

    Abstract Dendritic molecules bearing metal complexes in their structure (metallodendrimers and metallodendrons) are considered prospective therapeutic entities. In particular, metallodendrons raise interest as antitumor agents for the treatment of poorly curable or drug-resistant tumors. Herein, we have synthesized amphiphilic triazine-phosphorus dendrons bearing multiple copper (II) or gold (III) complexes on the periphery and a branched hydrophobic fragment at the focal point. Due to their amphiphilic nature, metallodendrons formed single micelles (mean diameter ~9 nm) or multi-micellar aggregates (mean diameter ~60 nm) in a water solution. We have tested the antitumor activity of amphiphilic metallodendrons towards glioblastoma, a malignant brain tumor with a notoriously high level of therapy resistance, as a model disease. The metallodendrons exhibit higher cytotoxic activity towards glioblastoma stem cells (BTSC233, JHH520, NCH644, and SF188 cell lines) and U87 glioblastoma cells (IC50 was 3-6 µM for copper-containing dendron and 11-15 µM for gold-containing dendron) in comparison with temozolomide (IC50 >100 µM)-the clinical standard of care for glioblastoma. Our findings show the potential of metallodendron-based nanoformulations as antitumor entities.
    Language English
    Publishing date 2022-02-10
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527217-2
    ISSN 1999-4923
    ISSN 1999-4923
    DOI 10.3390/pharmaceutics14020393
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Effects of Dendrimer-microRNA Nanoformulations against Glioblastoma Stem Cells.

    Knauer, Nadezhda / Meschaninova, Mariya / Muhammad, Sajjad / Hänggi, Daniel / Majoral, Jean-Pierre / Kahlert, Ulf Dietrich / Kozlov, Vladimir / Apartsin, Evgeny K

    Pharmaceutics

    2023  Volume 15, Issue 3

    Abstract: Glioblastoma is a rapidly progressing tumor quite resistant to conventional treatment. These features are currently assigned to a self-sustaining population of glioblastoma stem cells. Anti-tumor stem cell therapy calls for a new means of treatment. In ... ...

    Abstract Glioblastoma is a rapidly progressing tumor quite resistant to conventional treatment. These features are currently assigned to a self-sustaining population of glioblastoma stem cells. Anti-tumor stem cell therapy calls for a new means of treatment. In particular, microRNA-based treatment is a solution, which in turn requires specific carriers for intracellular delivery of functional oligonucleotides. Herein, we report a preclinical in vitro validation of antitumor activity of nanoformulations containing antitumor microRNA miR-34a and microRNA-21 synthetic inhibitor and polycationic phosphorus and carbosilane dendrimers. The testing was carried out in a panel of glioblastoma and glioma cell lines, glioblastoma stem-like cells and induced pluripotent stem cells. We have shown dendrimer-microRNA nanoformulations to induce cell death in a controllable manner, with cytotoxic effects being more pronounced in tumor cells than in non-tumor stem cells. Furthermore, nanoformulations affected the expression of proteins responsible for interactions between the tumor and its immune microenvironment: surface markers (PD-L1, TIM3, CD47) and IL-10. Our findings evidence the potential of dendrimer-based therapeutic constructions for the anti-tumor stem cell therapy worth further investigation.
    Language English
    Publishing date 2023-03-17
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527217-2
    ISSN 1999-4923
    ISSN 1999-4923
    DOI 10.3390/pharmaceutics15030968
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Topological Aspects of the Design of Nanocarriers for Therapeutic Peptides and Proteins.

    Knauer, Nadezhda / Pashkina, Ekaterina / Apartsin, Evgeny

    Pharmaceutics

    2019  Volume 11, Issue 2

    Abstract: Supramolecular chemistry holds great potential for the design of versatile and safe carriers for therapeutic proteins and peptides. Nanocarriers can be designed to meet specific criteria for given application (exact drug, administration route, target ... ...

    Abstract Supramolecular chemistry holds great potential for the design of versatile and safe carriers for therapeutic proteins and peptides. Nanocarriers can be designed to meet specific criteria for given application (exact drug, administration route, target tissue, etc.). However, alterations in the topology of formulation components can drastically change their activity. This is why the supramolecular topology of therapeutic nanoconstructions has to be considered. Herein, we discuss several topological groups used for the design of nanoformulations for peptide and protein delivery: modification of polypeptide chains by host-guest interactions; packaging of proteins and peptides into liposomes; complexation and conjugation with dendrimers. Each topological type has its own advantages and disadvantages, so careful design of nanoformulations is needed. Ideally, each case where nanomedicine is needed requires a therapeutic construction specially created for that taking into account features of the administration route, target tissue, or organ, properties of a drug, its bioavailability, etc. The wide number of studies in the field of protein delivery by supramolecular and nanocarriers for proteins and peptides evidence their increasing potential for different aspects of the innovative medicine. Although significant progress has been achieved in the field, there are several remaining challenges to be overcome in future.
    Language English
    Publishing date 2019-02-21
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2527217-2
    ISSN 1999-4923
    ISSN 1999-4923
    DOI 10.3390/pharmaceutics11020091
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: The Effect of Cucurbit[7]uril on the Antitumor and Immunomodulating Properties of Oxaliplatin and Carboplatin.

    Pashkina, Ekaterina / Aktanova, Alina / Mirzaeva, Irina / Kovalenko, Ekaterina / Andrienko, Irina / Knauer, Nadezhda / Pronkina, Natalya / Kozlov, Vladimir

    International journal of molecular sciences

    2021  Volume 22, Issue 14

    Abstract: Cucurbit[7]uril (CB[7]) is a molecular container that may form host-guest complexes with platinum(II) anticancer drugs and modulate their efficacy and safety. In this paper, we report our studies of the effect of CB[7]-oxaliplatin complex and the mixture ...

    Abstract Cucurbit[7]uril (CB[7]) is a molecular container that may form host-guest complexes with platinum(II) anticancer drugs and modulate their efficacy and safety. In this paper, we report our studies of the effect of CB[7]-oxaliplatin complex and the mixture of CB[7] and carboplatin (1:1) on viability and proliferation of a primary cell culture (peripheral blood mononuclear cells), two tumor cell lines (B16 and K562) and their activity in the animal model of melanoma. At the same time, we studied the impact of platinum (II) drugs with CB[7] on T cells and B cells in vitro. Although the stable CB[7]-carboplatin complex was not formed, the presence of cucurbit[7]uril affected the biological properties of carboplatin. In vivo, CB[7] increased the antitumor effect of carboplatin, but, at the same time, increased its acute toxicity. Compared to free oxaliplatin, its complex with CB[7] shows a greater cytotoxic effect on tumor cell lines B16 and K562, while in vivo, the effects of the free drug and encapsulated drug were comparable. However, in vivo studies also demonstrated that the encapsulation of oxaliplatin in CB[7] lowered the toxicity of the drug.
    MeSH term(s) Animals ; Antineoplastic Agents/pharmacology ; Bridged-Ring Compounds/pharmacology ; Carboplatin/pharmacology ; Female ; Humans ; Imidazoles/pharmacology ; Immunologic Factors/pharmacology ; K562 Cells ; Melanoma, Experimental/drug therapy ; Melanoma, Experimental/immunology ; Melanoma, Experimental/pathology ; Mice ; Organoplatinum Compounds/pharmacology ; Pyridines/pharmacology
    Chemical Substances Antineoplastic Agents ; Bridged-Ring Compounds ; Imidazoles ; Immunologic Factors ; Organoplatinum Compounds ; Pyridines ; cucurbit(7)uril ; oxiplatin ; Carboplatin (BG3F62OND5)
    Language English
    Publishing date 2021-07-08
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms22147337
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Effects of Cationic Dendrimers and Their Complexes with microRNAs on Immunocompetent Cells.

    Knauer, Nadezhda / Pashkina, Ekaterina / Aktanova, Alina / Boeva, Olga / Arkhipova, Valeria / Barkovskaya, Margarita / Meschaninova, Mariya / Karpus, Andrii / Majoral, Jean-Pierre / Kozlov, Vladimir / Apartsin, Evgeny

    Pharmaceutics

    2022  Volume 15, Issue 1

    Abstract: Short regulatory oligonucleotides are considered prospective tools for immunotherapy. However, they require an adequate carrier to deliver potential therapeutics into immune cells. Herein, we explore the potential of polycationic dendrimers as carriers ... ...

    Abstract Short regulatory oligonucleotides are considered prospective tools for immunotherapy. However, they require an adequate carrier to deliver potential therapeutics into immune cells. Herein, we explore the potential of polycationic dendrimers as carriers for microRNAs in peripheral blood mononuclear cells of healthy donors. As an oligonucleotide cargo, we use a synthetic mimic and an inhibitor of miR-155, an important factor in the development and functioning of immunocompetent cells. Dendrimers bind microRNAs into low-cytotoxic polyelectrolyte complexes that are efficiently uptaken by immunocompetent cells. We have shown these complexes to affect the number of T-regulatory cells, CD14
    Language English
    Publishing date 2022-12-31
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527217-2
    ISSN 1999-4923
    ISSN 1999-4923
    DOI 10.3390/pharmaceutics15010148
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Triazine-Carbosilane Dendrimersomes Enhance Cellular Uptake and Phototoxic Activity of Rose Bengal in Basal Cell Skin Carcinoma Cells.

    Sztandera, Krzysztof / Gorzkiewicz, Michał / Bątal, Mateusz / Arkhipova, Valeria / Knauer, Nadezhda / Sánchez-Nieves, Javier / de la Mata, Fco Javier / Gómez, Rafael / Apartsin, Evgeny / Klajnert-Maculewicz, Barbara

    International journal of nanomedicine

    2022  Volume 17, Page(s) 1139–1154

    Abstract: Background: The search for new formulations for photodynamic therapy is intended to improve the outcome of skin cancer treatment using significantly reduced doses of photosensitizer, thereby avoiding side effects. The incorporation of photosensitizers ... ...

    Abstract Background: The search for new formulations for photodynamic therapy is intended to improve the outcome of skin cancer treatment using significantly reduced doses of photosensitizer, thereby avoiding side effects. The incorporation of photosensitizers into nanoassemblies is a versatile way to increase the efficiency and specificity of drug delivery into target cells. Herein, we report the loading of rose bengal into vesicle-like constructs of amphiphilic triazine-carbosilane dendrons (dendrimersomes) as well as biophysical and in vitro characterization of this novel nanosystem.
    Methods: Using established protocol and analytical and spectroscopy techniques we were able to synthesized dendrons with strictly designed properties. Engaging biophysical methods (hydrodynamic diameter and zeta potential measurements, analysis of spectral properties, transmission electron microscopy) we confirmed assembling of our nanosystem. A set of in vitro techniques was used for determination ROS generation, (ABDA and H
    Results: Encapsulation of rose bengal inside dendrimersomes enhances cellular uptake, intracellular ROS production and concequently, the phototoxicity of this photosensitizer.
    Conclusion: Triazine-carbosilane dendrimersomes show high capacity as drug carriers for anticancer photodynamic therapy.
    MeSH term(s) Carcinoma ; Humans ; Rose Bengal/chemistry ; Rose Bengal/pharmacology ; Silanes/pharmacology ; Triazines/pharmacology
    Chemical Substances Silanes ; Triazines ; carbosilane ; Rose Bengal (1ZPG1ELY14)
    Language English
    Publishing date 2022-03-15
    Publishing country New Zealand
    Document type Journal Article
    ZDB-ID 2364941-0
    ISSN 1178-2013 ; 1176-9114
    ISSN (online) 1178-2013
    ISSN 1176-9114
    DOI 10.2147/IJN.S352349
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: In Vitro Validation of the Therapeutic Potential of Dendrimer-Based Nanoformulations against Tumor Stem Cells.

    Knauer, Nadezhda / Arkhipova, Valeria / Li, Guanzhang / Hewera, Michael / Pashkina, Ekaterina / Nguyen, Phuong-Hien / Meschaninova, Maria / Kozlov, Vladimir / Zhang, Wei / Croner, Roland S / Caminade, Anne-Marie / Majoral, Jean-Pierre / Apartsin, Evgeny K / Kahlert, Ulf D

    International journal of molecular sciences

    2022  Volume 23, Issue 10

    Abstract: Tumor cells with stem cell properties are considered to play major roles in promoting the development and malignant behavior of aggressive cancers. Therapeutic strategies that efficiently eradicate such tumor stem cells are of highest clinical need. ... ...

    Abstract Tumor cells with stem cell properties are considered to play major roles in promoting the development and malignant behavior of aggressive cancers. Therapeutic strategies that efficiently eradicate such tumor stem cells are of highest clinical need. Herein, we performed the validation of the polycationic phosphorus dendrimer-based approach for small interfering RNAs delivery in in vitro stem-like cells as models. As a therapeutic target, we chose Lyn, a member of the Src family kinases as an example of a prominent enzyme class widely discussed as a potent anti-cancer intervention point. Our selection is guided by our discovery that Lyn mRNA expression level in glioma, a class of brain tumors, possesses significant negative clinical predictive value, promoting its potential as a therapeutic target for future molecular-targeted treatments. We then showed that anti-Lyn siRNA, delivered into Lyn-expressing glioma cell model reduces the cell viability, a fact that was not observed in a cell model that lacks Lyn-expression. Furthermore, we have found that the dendrimer itself influences various parameters of the cells such as the expression of surface markers PD-L1, TIM-3 and CD47, targets for immune recognition and other biological processes suggested to be regulating glioblastoma cell invasion. Our findings prove the potential of dendrimer-based platforms for therapeutic applications, which might help to eradicate the population of cancer cells with augmented chemotherapy resistance. Moreover, the results further promote our functional stem cell technology as suitable component in early stage drug development.
    MeSH term(s) Brain Neoplasms/metabolism ; Dendrimers/metabolism ; Dendrimers/pharmacology ; Glioblastoma/metabolism ; Glioma/metabolism ; Humans ; Neoplastic Stem Cells/metabolism ; RNA, Small Interfering/genetics ; RNA, Small Interfering/metabolism
    Chemical Substances Dendrimers ; RNA, Small Interfering
    Language English
    Publishing date 2022-05-19
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms23105691
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  8. Article ; Online: Evaluation of the Immunosafety of Cucurbit[n]uril on Peripheral Blood Mononuclear Cells In Vitro.

    Pashkina, Ekaterina / Aktanova, Alina / Blinova, Elena / Mirzaeva, Irina / Kovalenko, Ekaterina / Knauer, Nadezhda / Ermakov, Aleksandr / Kozlov, Vladimir

    Molecules (Basel, Switzerland)

    2020  Volume 25, Issue 15

    Abstract: Cucurbiturils (CB[n]s) are nanoscale macrocyclic compounds capable of encapsulating a molecule or part of a molecule by forming host-guest complexes. Integration of drugs with CB[n] is used for the following purposes: controlling clearance; protection of ...

    Abstract Cucurbiturils (CB[n]s) are nanoscale macrocyclic compounds capable of encapsulating a molecule or part of a molecule by forming host-guest complexes. Integration of drugs with CB[n] is used for the following purposes: controlling clearance; protection of the drug from biodegradation; targeted delivery to specific organs, tissues, or cells; reduction of toxicity; and improving solubility. One of the major problems encountered in the application of new drug delivery systems is lack of knowledge of their biological properties. CB[n], unlike many other often toxic nanoparticles, has extremely low toxicity, even at high doses. However, many aspects of the biological actions of these nanoscale cavitands remain unclear, including the immunotropic properties. In this study, we investigated the immunotoxicity and immunomodulation properties of CB[n]. It was found that CB[7] and CB[6] did not decrease the viability of mononuclear cells at all tested concentrations from 0.1-1 mM. Overall, the results indicated an immunomodulatory effect of different concentrations of CB[n]. In the case of a longer cultivation time, CB[n] had an immunostimulating effect, which was indicated by an enhancement of the proliferative activity of cells and increased expression of HLA-DR on lymphocytes.
    MeSH term(s) Apoptosis/drug effects ; Cell Cycle/drug effects ; Cell Proliferation/drug effects ; Cells, Cultured ; Humans ; Leukocytes, Mononuclear/cytology ; Leukocytes, Mononuclear/drug effects ; Leukocytes, Mononuclear/immunology ; Macrocyclic Compounds/adverse effects ; Macrocyclic Compounds/pharmacology
    Chemical Substances Macrocyclic Compounds ; cucurbit(n)uril
    Language English
    Publishing date 2020-07-27
    Publishing country Switzerland
    Document type Evaluation Study ; Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules25153388
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: pH-Sensitive Dendrimersomes of Hybrid Triazine-Carbosilane Dendritic Amphiphiles-Smart Vehicles for Drug Delivery.

    Apartsin, Evgeny / Knauer, Nadezhda / Arkhipova, Valeria / Pashkina, Ekaterina / Aktanova, Alina / Poletaeva, Julia / Sánchez-Nieves, Javier / de la Mata, Francisco Javier / Gómez, Rafael

    Nanomaterials (Basel, Switzerland)

    2020  Volume 10, Issue 10

    Abstract: Supramolecular constructions of amphiphilic dendritic molecules are promising vehicles for anti-cancer drug delivery due to the flexibility of their architecture, high drug loading capacity and avoiding off-target effects of a drug. Herein, we report a ... ...

    Abstract Supramolecular constructions of amphiphilic dendritic molecules are promising vehicles for anti-cancer drug delivery due to the flexibility of their architecture, high drug loading capacity and avoiding off-target effects of a drug. Herein, we report a new class of amphiphilic dendritic species-triazine-carbosilane dendrons readily self-assembling into pH-sensitive dendrimersomes. The dendrimersomes efficiently encapsulate anticancer drugs doxorubicin and methotrexate. Chemodrug-loaded dendrimersomes have dose-related cytotoxic activity against leukaemia cell lines 1301 and K562. Our findings suggest that triazine-carbosilane dendrimersomes are prospective drug carriers for anti-cancer therapy.
    Language English
    Publishing date 2020-09-23
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662255-5
    ISSN 2079-4991
    ISSN 2079-4991
    DOI 10.3390/nano10101899
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