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Zamani MR, Hadzima M, Blažková K, Šubr V, Ormsby T, Celis-Gutierrez J, Malissen B, Kostka L, Etrych T, Šácha P, Konvalinka J. Polymer-based antibody mimetics (iBodies) target human PD-L1 and function as a potent immune checkpoint blocker. J Biol Chem 2024; 300:107325. [PMID: 38685532 PMCID: PMC11154707 DOI: 10.1016/j.jbc.2024.107325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 04/09/2024] [Accepted: 04/19/2024] [Indexed: 05/02/2024] Open
Abstract
Immune checkpoint blockade (ICB) using monoclonal antibodies against programmed cell death protein 1 (PD-1) or programmed death-ligand 1 (PD-L1) is the treatment of choice for cancer immunotherapy. However, low tissue permeability, immunogenicity, immune-related adverse effects, and high cost could be possibly improved using alternative approaches. On the other hand, synthetic low-molecular-weight (LMW) PD-1/PD-L1 blockers have failed to progress beyond in vitro studies, mostly due to low binding affinity or poor pharmacological characteristics resulting from their limited solubility and/or stability. Here, we report the development of polymer-based anti-human PD-L1 antibody mimetics (α-hPD-L1 iBodies) by attaching the macrocyclic peptide WL12 to a N-(2-hydroxypropyl)methacrylamide copolymer. We characterized the binding properties of iBodies using surface plasmon resonance, enzyme-linked immunosorbent assay, flow cytometry, confocal microscopy, and a cellular ICB model. We found that the α-hPD-L1 iBodies specifically target human PD-L1 (hPD-L1) and block the PD-1/PD-L1 interaction in vitro, comparable to the atezolizumab, durvalumab, and avelumab licensed monoclonal antibodies targeting PD-L1. Our findings suggest that iBodies can be used as experimental tools to target hPD-L1 and could serve as a platform to potentiate the therapeutic effect of hPD-L1-targeting small molecules by improving their affinity and pharmacokinetic properties.
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Affiliation(s)
- Mohammad Reza Zamani
- Faculty of Science, Department of Cell Biology, Charles University, Prague, Czech Republic; Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Martin Hadzima
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic; Faculty of Science, Department of Organic Chemistry, Charles University, Prague, Czech Republic
| | - Kristýna Blažková
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Vladimír Šubr
- Department of Biomedical polymers, Institute of Macromolecular Chemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Tereza Ormsby
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Javier Celis-Gutierrez
- Centre d'Immunologie de Marseille-Luminy, Aix-Marseille Université, INSERM, CNRS, Marseille, France
| | - Bernard Malissen
- Centre d'Immunologie de Marseille-Luminy, Aix-Marseille Université, INSERM, CNRS, Marseille, France
| | - Libor Kostka
- Department of Biomedical polymers, Institute of Macromolecular Chemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Tomáš Etrych
- Department of Biomedical polymers, Institute of Macromolecular Chemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Pavel Šácha
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic.
| | - Jan Konvalinka
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic; Faculty of Science, Department of Biochemistry, Charles University, Prague, Czech Republic.
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Anane-Adjei AB, Fletcher NL, Cavanagh RJ, Houston ZH, Crawford T, Pearce AK, Taresco V, Ritchie AA, Clarke P, Grabowska AM, Gellert PR, Ashford MB, Kellam B, Thurecht KJ, Alexander C. Synthesis, characterisation and evaluation of hyperbranched N-(2-hydroxypropyl) methacrylamides for transport and delivery in pancreatic cell lines in vitro and in vivo. Biomater Sci 2022; 10:2328-2344. [PMID: 35380131 DOI: 10.1039/d1bm01548f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hyperbranched polymers have many promising features for drug delivery, owing to their ease of synthesis, multiple functional group content, and potential for high drug loading with retention of solubility. Here we prepared hyperbranched N-(2-hydroxypropyl)methacrylamide (HPMA) polymers with a range of molar masses and particle sizes, and with attached dyes, radiolabel or the anticancer drug gemcitabine. Reversible addition-fragmentation chain transfer (RAFT) polymerisation enabled the synthesis of pHPMA polymers and a gemcitabine-comonomer functionalised pHPMA polymer pro-drug, with diameters of the polymer particles ranging from 7-40 nm. The non-drug loaded polymers were well-tolerated in cancer cell lines and macrophages, and were rapidly internalised in 2D cell culture and transported efficiently to the centre of dense pancreatic cancer 3D spheroids. The gemcitabine-loaded polymer pro-drug was found to be toxic both to 2D cultures of MIA PaCa-2 cells and also in reducing the volume of MIA PaCa-2 spheroids. The non-drug loaded polymers caused no short-term adverse effects in healthy mice following systemic injection, and derivatives of these polymers labelled with 89Zr-were tracked for their distribution in the organs of healthy and MIA PaCa-2 xenograft bearing Balb/c nude mice. Tumour accumulation, although variable across the samples, was highest in individual animals for the pHPMA polymer of ∼20 nm size, and accordingly a gemcitabine pHPMA polymer pro-drug of ∼18 nm diameter was evaluated for efficacy in the tumour-bearing animals. The efficacy of the pHPMA polymer pro-drug was very similar to that of free gemcitabine in terms of tumour growth retardation, and although there was a survival benefit after 70 days for the polymer pro-drug, there was no difference at day 80. These data suggest that while polymer pro-drugs of this type can be effective, better tumour targeting and enhanced in situ release remain as key obstacles to clinical translation even for relatively simple polymers such as pHPMA.
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Affiliation(s)
- Akosua B Anane-Adjei
- Division of Molecular Therapeutics and Formulation, School of Pharmacy, University of Nottingham, NG7 2RD, UK.
| | - Nicholas L Fletcher
- Centre for Advanced Imaging, University of Queensland, Brisbane, Australia. .,Australian Institute for Bioengineering and Nanotechnology, University of Queensland, Brisbane, Australia
| | - Robert J Cavanagh
- Division of Molecular Therapeutics and Formulation, School of Pharmacy, University of Nottingham, NG7 2RD, UK.
| | - Zachary H Houston
- Centre for Advanced Imaging, University of Queensland, Brisbane, Australia. .,Australian Institute for Bioengineering and Nanotechnology, University of Queensland, Brisbane, Australia
| | - Theodore Crawford
- Centre for Advanced Imaging, University of Queensland, Brisbane, Australia.
| | - Amanda K Pearce
- Division of Molecular Therapeutics and Formulation, School of Pharmacy, University of Nottingham, NG7 2RD, UK.
| | - Vincenzo Taresco
- Division of Molecular Therapeutics and Formulation, School of Pharmacy, University of Nottingham, NG7 2RD, UK.
| | | | - Phillip Clarke
- School of Medicine, University of Nottingham, NG7 2RD, UK
| | | | - Paul R Gellert
- Product Technology & Development, Operations, AstraZeneca, Macclesfield, UK
| | - Marianne B Ashford
- Advanced Drug Delivery, Pharmaceutical Sciences, R&D AstraZeneca, Macclesfield, UK
| | - Barrie Kellam
- Division of Molecular Therapeutics and Formulation, School of Pharmacy, University of Nottingham, NG7 2RD, UK.
| | - Kristofer J Thurecht
- Centre for Advanced Imaging, University of Queensland, Brisbane, Australia. .,Australian Institute for Bioengineering and Nanotechnology, University of Queensland, Brisbane, Australia
| | - Cameron Alexander
- Division of Molecular Therapeutics and Formulation, School of Pharmacy, University of Nottingham, NG7 2RD, UK.
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Wang F, Sun W, Li L, Li L, Liu Y, Zhang ZR, Huang Y. Charge-Reversible Multifunctional HPMA Copolymers for Mitochondrial Targeting. ACS APPLIED MATERIALS & INTERFACES 2017; 9:27563-27574. [PMID: 28762267 DOI: 10.1021/acsami.7b09693] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Mitochondrial-oriented delivery of anticancer drugs has been considered as a promising strategy to improve the antitumor efficiency of chemotherapeutics. However, the physiological and biological barriers from the injection site to the final mitochondrial action site remain great challenges. Herein, a novel mitochondrial-targeted multifunctional nanocomplex based on N-(2-hydroxypropyl) methacrylamide (HPMA) copolymers (MPC) is designed to enhance drug accumulation in mitochondria. MPC possesses various functions such as extracellular pH response, superior cellular uptake, lysosomal escape, and mitochondrial targeting. In detail, MPC was formed by two oppositely charged HPMA copolymers, that is, positively charged mitochondrial-targeting guanidine group-modified copolymers and charge-reversible 2,3-dimethylmaleic anhydride (DMA)-modified copolymers (P-DMA). It was validated that MPC could remain stable in the blood circulation (pH 7.4) but could be cleaved to expose the positive charge of the guanidine group immediately in response to the mild acidity of tumor tissues (pH 6.5). The gradual exposure of positively charged guanidine will simultaneously facilitate endocytosis, endosomal/lysosomal escape, and mitochondrial targeting. The in vitro experiments showed that compared with copolymers without guanidine modification, the cellular uptake and mitochondrial-targeting ability of MPC in the simulated tumor environment (MPC@pH6.5) separately increased 4.3- and 23.8-fold, respectively. The in vivo experiments were processed on B16F10 tumor-bearing C57 mice, and MPC showed the highest accumulation in the tumor site and a peak tumor inhibition rate of 82.9%. In conclusion, multifunctional mitochondrial-targeting HPMA copolymers provide a novel and versatile approach for cancer therapy.
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Affiliation(s)
- Fengling Wang
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University , No. 17, Block 3, Southern Renmin Road, Chengdu 610041, China
| | - Wei Sun
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University , No. 17, Block 3, Southern Renmin Road, Chengdu 610041, China
| | - Lian Li
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University , No. 17, Block 3, Southern Renmin Road, Chengdu 610041, China
| | - Lijia Li
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University , No. 17, Block 3, Southern Renmin Road, Chengdu 610041, China
| | - Yuanyuan Liu
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University , No. 17, Block 3, Southern Renmin Road, Chengdu 610041, China
| | - Zhi-Rong Zhang
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University , No. 17, Block 3, Southern Renmin Road, Chengdu 610041, China
| | - Yuan Huang
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University , No. 17, Block 3, Southern Renmin Road, Chengdu 610041, China
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Li L, Sun W, Li L, Liu Y, Wu L, Wang F, Zhou Z, Zhang Z, Huang Y. A pH-responsive sequential-disassembly nanohybrid for mitochondrial targeting. NANOSCALE 2017; 9:314-325. [PMID: 27910990 DOI: 10.1039/c6nr07004c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Cationic materials have been reported as promising tools for targeting to mitochondria which are the "power houses" and "metabolic garbage keepers" of cells. However, their positive nature also restricts their in vivo application due to the quick clearance. Herein, we fabricated a nanohybrid consisting of the pH-responsive N-(2-hydroxypropyl)methacrylamide (HPMA) co-polymer (R-P) shells and positive mesoporous silica nanoparticle cores via electrostatic interaction. The anticancer drug, docetaxel (DTX), was encapsulated in the positive MSN cores (MSN-DTX). Once concealed by the anionic R-P shield, the assembled nanohybrid R-P@MSN-DTX will achieve prolonged blood circulation thereby leading to an enhanced EPR effect. At mildly acidic tumor environmental pH, first-stage charge reversion took place due to the hydrolysis of the amide bond on HPMA co-polymers. The de-attachment of the HPMA co-polymer occurred because of the positive charge repulsion and partial exposure of the positively charged MSN core promoted the cell internalization. The second-stage pH-responsiveness in the endo/lysosomes with a more acidic environment accelerates the disassembly of the nanohybrid and the leakage of the core facilitated the endo/lysosome escape and mitochondrial targeting with the help of intracellular compartmental acidity. Gathering up the characteristics of neutralized charge and stepwise pH-responsiveness, the R-P@MSN-DTX acquired a good tumor inhibition rate of 72.6% on nude mice. Our report provided a reference for systemic mitochondrial targeting achieved by the union of "assembly-disassembly".
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Affiliation(s)
- Lijia Li
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University, No. 17, Block 3, Southern Renmin Road, Chengdu 610041, PR China.
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Zhong J, Zhu X, Luo K, Li L, Tang M, Liu Y, Zhou Z, Huang Y. Direct Cytoplasmic Delivery and Nuclear Targeting Delivery of HPMA-MT Conjugates in a Microtubules Dependent Fashion. Mol Pharm 2016; 13:3069-79. [PMID: 27417390 DOI: 10.1021/acs.molpharmaceut.6b00181] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
As the hearts of tumor cells, the nucleus is the ultimate target of many chemotherapeutic agents and genes. However, nuclear drug delivery is always hampered by multiple intracellular obstacles, such as low efficiency of lysosome escape and insufficient nuclear trafficking. Herein, an N-(2-hydroxypropyl) methacrylamide (HPMA) polymer-based drug delivery system was designed, which could achieve direct cytoplasmic delivery by a nonendocytic pathway and transport into the nucleus in a microtubules dependent fashion. A special targeting peptide (MT), derived from an endogenic parathyroid hormone-related protein, was conjugated to the polymer backbone, which could accumulate into the nucleus a by microtubule-mediated pathway. The in vitro studies found that low temperature and NaN3 could not influence the cell internalization of the conjugates. Besides, no obvious overlay of the conjugates with lysosome demonstrated that the polymer conjugates could enter the tumor cell cytoplasm by a nonendocytic pathway, thus avoiding the drug degradation in the lysosome. Furthermore, after suppression of the microtubule dynamics with microtubule stabilizing docetaxel (DTX) and destabilizing nocodazole (Noc), the nuclear accumulation of polymeric conjugates was significantly inhibited. Living cells fluorescence recovery after photobleaching study found that the nuclear import rate of conjugates was 2-fold faster compared with the DTX and Noc treated groups. These results demonstrated that the conjugates transported into the nucleus in a microtubules dependent way. Therefore, in addition to direct cytoplasmic delivery, our peptide conjugated polymeric platform could simultaneously mediate nuclear drug accumulation, which may open a new path for further intracellular genes/peptides delivery.
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Affiliation(s)
- Jiaju Zhong
- Key Laboratory of Drug Targeting and Drug Delivery System (Ministery of Education), West China School of Pharmacy, Sichuan University , NO. 17, Block 3, South Renmin Road, Chengdu 610041, P.R. China
| | - Xi Zhu
- Key Laboratory of Drug Targeting and Drug Delivery System (Ministery of Education), West China School of Pharmacy, Sichuan University , NO. 17, Block 3, South Renmin Road, Chengdu 610041, P.R. China
| | - Kui Luo
- Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital, Sichuan University , Chengdu 610041, China
| | - Lian Li
- Key Laboratory of Drug Targeting and Drug Delivery System (Ministery of Education), West China School of Pharmacy, Sichuan University , NO. 17, Block 3, South Renmin Road, Chengdu 610041, P.R. China
| | - Manlin Tang
- Key Laboratory of Drug Targeting and Drug Delivery System (Ministery of Education), West China School of Pharmacy, Sichuan University , NO. 17, Block 3, South Renmin Road, Chengdu 610041, P.R. China
| | - Yanxi Liu
- Key Laboratory of Drug Targeting and Drug Delivery System (Ministery of Education), West China School of Pharmacy, Sichuan University , NO. 17, Block 3, South Renmin Road, Chengdu 610041, P.R. China
| | - Zhou Zhou
- Key Laboratory of Drug Targeting and Drug Delivery System (Ministery of Education), West China School of Pharmacy, Sichuan University , NO. 17, Block 3, South Renmin Road, Chengdu 610041, P.R. China
| | - Yuan Huang
- Key Laboratory of Drug Targeting and Drug Delivery System (Ministery of Education), West China School of Pharmacy, Sichuan University , NO. 17, Block 3, South Renmin Road, Chengdu 610041, P.R. China
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6
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Yang Q, Li L, Sun W, Zhou Z, Huang Y. Dual Stimuli-Responsive Hybrid Polymeric Nanoparticles Self-Assembled from POSS-Based Starlike Copolymer-Drug Conjugates for Efficient Intracellular Delivery of Hydrophobic Drugs. ACS APPLIED MATERIALS & INTERFACES 2016; 8:13251-61. [PMID: 27167898 DOI: 10.1021/acsami.6b02403] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
To further fine tune drug release and enhance therapeutic effects of polyhedral oligomericsilsesquioxane (POSS)-based nanomedicine, a starlike organic-inorganic conjugate was synthesized by grafting semitelechelic N-(2-hydroxypropyl) methacrylamide (HPMA) copolymers to a POSS rigid core through reductively degradable disulfide bonds. The hydrophobic docetaxel (DTX) was attached to the grafts by pH-sensitive hydrazone bonds and also encapsulated into the POSS core (SP-DTX). Thus, the final amphiphilic star-shaped conjugates could self-assemble into nanoparticles and exhibited conspicuous drug-loading capacity (20.1 wt %) based on the covalently conjugated accompanied by physically encapsulated DTX. The stimuli-responsive DTX release under acidic lysosomal and reducing cytoplasmic environments was verified, leading to enhanced cytotoxicity against PC-3 human prostate carcinoma cells. To evaluate the in vivo therapeutic effects of the DTX-loaded nanovehicles objectively, a stroma-rich, prostate xenograft tumor model was generated. SP-DTX displayed uniform tumor distribution and suppressed tumor growth to a more pronounced level (tumor inhibition of 78.9%) than nonredox-sensitive SP-DTX-A (67.4%), SP-DTX-C contained DTX only in the core (65.5%) or linear P-DTX (60.7%) through enhanced depletion of cancer-associated fibroblasts and induction of apoptosis. The hybrid POSS-based polymeric nanoparticles offer an efficient approach to transport hydrophobic drugs for cancer therapy.
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Affiliation(s)
- Qingqing Yang
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University . No. 17, Block 3, Southern Renmin Road, Chengdu 610041, P.R. China
| | - Lian Li
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University . No. 17, Block 3, Southern Renmin Road, Chengdu 610041, P.R. China
| | - Wei Sun
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University . No. 17, Block 3, Southern Renmin Road, Chengdu 610041, P.R. China
| | - Zhou Zhou
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University . No. 17, Block 3, Southern Renmin Road, Chengdu 610041, P.R. China
| | - Yuan Huang
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University . No. 17, Block 3, Southern Renmin Road, Chengdu 610041, P.R. China
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Mielańczyk A, Skonieczna M, Mielańczyk Ł, Neugebauer D. In Vitro Evaluation of Doxorubicin Conjugates Based on Sugar Core Nonlinear Polymethacrylates toward Anticancer Drug Delivery. Bioconjug Chem 2016; 27:893-904. [PMID: 26942938 DOI: 10.1021/acs.bioconjchem.5b00671] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
V-shaped and star-shaped hydroxylamine-functionalized polymethacrylates designed as nanosized conjugates (<120 nm) with anticancer agent, namely, doxorubicin (DOX), were evaluated in vitro toward their potential usage as drug delivery systems in breast cancer (MCF-7) treatment. Statistical analysis of MTS assay results showed that the 4-arm conjugate (n(DOX) = 16) was the most effective polymeric system against MCF-7/W (wild type) and MCF-7/R (DOX resistant) cell lines. Apoptosis assay analysis showed that MCF-7/R cells cultured with nonlinear copolymers died due to necrosis and late apoptotis, whereas MCF-7/W cells were in early and late apoptosis. Among all tested conjugates, the most promising results with induction of apoptosis without inducing necrosis in both MCF-7 cell lines were obtained for conjugate based on 4-arm stars with low content of DOX. The cell cycle assay revealed that increase of MMA units in 4-arm copolymers induced MCF-7/R cell arrest in the SubG1 phase. In the same cell line, the corresponding conjugates triggered S and G2/M arrest. Gradual internalization of the chosen conjugate by MCF-7/R cells was monitored via fluorescence microscopy showing its main localization in the cytoplasm.
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Affiliation(s)
- A Mielańczyk
- Department of Physical Chemistry and Technology of Polymers, Faculty of Chemistry, Silesian University of Technology , M. Strzody 9 Street, 44-100 Gliwice, Poland
| | - M Skonieczna
- Biosystems Group, Institute of Automatic Control, Silesian University of Technology , Akademicka 16 Street, 44-100 Gliwice, Poland
| | - Ł Mielańczyk
- School of Medicine with the Division of Dentistry in Zabrze, Department of Histology and Embryology, Medical University of Silesia , Jordana 19 Street, 41-808 Zabrze, Poland
| | - D Neugebauer
- Department of Physical Chemistry and Technology of Polymers, Faculty of Chemistry, Silesian University of Technology , M. Strzody 9 Street, 44-100 Gliwice, Poland
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