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Santos JAV, Silva D, Marques MPM, Batista de Carvalho LAE. Platinum-based chemotherapy: trends in organic nanodelivery systems. NANOSCALE 2024; 16:14640-14686. [PMID: 39037425 DOI: 10.1039/d4nr01483a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/23/2024]
Abstract
Despite the investment in platinum drugs research, cisplatin, carboplatin and oxaliplatin are still the only Pt-based compounds used as first line treatments for several cancers, with a few other compounds being approved for administration in some Asian countries. However, due to the severe and worldwide impact of oncological diseases, there is an urge for improved chemotherapeutic approaches. Furthermore, the pharmaceutical application of platinum complexes is hindered by their inherent toxicity and acquired resistance. Nanodelivery systems rose as a key strategy to overcome these challenges, with recognized versatility and ability towards improving the safety, bioavailability and efficacy of the available drugs. Among the known nanocarriers, organic systems have been widely applied, taking advantage of their potential as drug vehicles. Researchers have mainly focused on the development of lipidic and polymeric carriers, including supramolecular structures, with an overall improvement of encapsulated platinum complexes. Herein, an overview of recent trends and strategies is presented, with the main focus on the encapsulation of platinum compounds into organic nanocarriers, showcasing the evolution in the design and development of these promising systems. This comprehensive review highlights formulation methods as well as characterization procedures, providing insights that may be helpful for the development of novel platinum nanocarriers aiming at future pharmaceutical applications.
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Affiliation(s)
- João A V Santos
- Molecular Physical-Chemistry R&D Unit, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal.
| | - Daniela Silva
- Molecular Physical-Chemistry R&D Unit, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal.
| | - Maria Paula M Marques
- Molecular Physical-Chemistry R&D Unit, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal.
- Department of Life Sciences, University of Coimbra, 3000-456 Coimbra, Portugal
| | - Luís A E Batista de Carvalho
- Molecular Physical-Chemistry R&D Unit, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal.
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Komal, Nanda BP, Singh L, Bhatia R, Singh A. Paclitaxel in colon cancer management: from conventional chemotherapy to advanced nanocarrier delivery systems. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024:10.1007/s00210-024-03256-8. [PMID: 38990305 DOI: 10.1007/s00210-024-03256-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2024] [Accepted: 06/22/2024] [Indexed: 07/12/2024]
Abstract
Paclitaxel, a potent chemotherapeutic agent derived from the bark of the Pacific yew tree, has demonstrated significant efficacy in the treatment of various cancers, including colon cancer. This comprehensive review delves into the conventional treatments for colon cancer, emphasizing the crucial role of paclitaxel in contemporary management strategies. It explores the intricate process of sourcing and synthesizing paclitaxel, highlighting the importance of its structural properties in its anticancer activity. The review further elucidates the mechanism of action of paclitaxel, its pharmacological effects, and its integration into chemotherapy regimens for colon cancer. Additionally, novel drug delivery systems, such as nanocarriers, liposomes, nanoparticles, microspheres, micelles, microemulsions, and niosomes, are examined for their potential to enhance the therapeutic efficacy of paclitaxel. The discussion extends to recent clinical trials and patents, showcasing advancements in paclitaxel formulations aimed at improving treatment outcomes. The review concludes with prospects in the field underscoring the ongoing innovation and potential breakthroughs in colon cancer therapy.
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Affiliation(s)
- Komal
- Department of Pharmaceutics, ISF College of Pharmacy, GT Road, Moga, Punjab, 142001, India
| | - Bibhu Prasad Nanda
- Department of Pharmaceutical Analysis, ISF College of Pharmacy, Moga, Punjab, 142001, India
| | - Lovekesh Singh
- Department of Pharmacology, ISF College of Pharmacy, Moga, Punjab, 142001, India
| | - Rohit Bhatia
- Department of Pharmaceutical Chemistry, Chitkara College of Pharmacy, Chitkara University, Rajpura, Punjab, India.
| | - Amandeep Singh
- Department of Pharmaceutics, ISF College of Pharmacy, GT Road, Moga, Punjab, 142001, India.
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Huynh DP, Tran TA, Nguyen TTH, Nguyen VVL. Preparation and characterization of the injectable pH- and temperature-sensitive pentablock hydrogel containing human growth hormone-loaded chitosan nanoparticles via electrospraying. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2024:1-21. [PMID: 38972044 DOI: 10.1080/09205063.2024.2365043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Accepted: 05/31/2024] [Indexed: 07/09/2024]
Abstract
This research investigated the in vivo gelation, biodegradation, and drug release efficiency of a novel injectable sensitive drug delivery system for human growth hormone (HGh). This composite system comprises pH- and temperature-sensitive hydrogel, designated as oligomer serine-b-poly(lactide)-b-poly(ethylene glycol)-b-poly(lactide)-b-oligomer serine (OS-PLA-PEG-PLA-OS) pentablock copolymer, as matrix and electrosprayed HGh-loaded chitosan (HGh@CS) nanoparticles (NPs) as principal material. The proton nuclear magnetic resonance spectrum of the pH- and temperature-sensitive OS-PLA-PEG-PLA-OS pentablock copolymer hydrogel proved that this copolymer was successfully synthesized. The HGh was encapsulated in chitosan (CS) NPs by an electrospraying system in acetic acid with appropriate granulation parameters. The scanning electron microscopy images and size distribution showed that the HGh@CS NPs formed had an average diameter of 366.1 ± 214.5 nm with a discrete spherical shape and dispersed morphology. The sol-gel transition of complex gel based on HGh@CS NPs and OS-PLA-PEG-PLA-OS pentablock hydrogel was investigated at 15 °C and pH 7.8 in the sol state and gelled at 37 °C and pH 7.4, which is suitable for the physiological conditions of the human body. The HGh release experiment of the composite system was performed in an in vivo environment, which demonstrated the ability to release HGh, and underwent biodegradation within 32 days. The findings of the investigation revealed that the distribution of HGh@CS NPs into the hydrogel matrix not only improved the mechanical properties of the gel matrix but also controlled the drug release kinetics into the systematic bloodstream, which ultimately promotes the desired therapeutic body growth depending on the distinct concentration used.
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Affiliation(s)
- Dai Phu Huynh
- Faculty of Materials Technology, Ho Chi Minh City University of Technology, Ho Chi Minh City, Vietnam
- Research Center for Polymeric Materials, Ho Chi Minh City University of Technology, Ho Chi Minh City, Vietnam
- Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Thien Anh Tran
- Research Center for Polymeric Materials, Ho Chi Minh City University of Technology, Ho Chi Minh City, Vietnam
- Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Thi Thanh Hang Nguyen
- Research Center for Polymeric Materials, Ho Chi Minh City University of Technology, Ho Chi Minh City, Vietnam
- Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Vu Viet Linh Nguyen
- Faculty of Applied Sciences, Ho Chi Minh City University of Technology and Education, Ho Chi Minh City, Vietnam
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Madeshwaran A, Vijayalakshmi P, Umapathy VR, Shanmugam R, Selvaraj C. Unlocking estrogen receptor: Structural insights into agonists and antagonists for glioblastoma therapy. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2024; 142:1-24. [PMID: 39059983 DOI: 10.1016/bs.apcsb.2024.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/28/2024]
Abstract
Glioblastoma (GBM), a malignant brain tumor originating in glial cells, is one of the most common primary brain malignancies, affecting one in 100,000 people, typically in the frontal lobe. Estrogens, like estradiol-17 (E2), significantly influence GBM progression, metastasis, and angiogenesis. Estrogen receptors (ERs) are crucial in signal transduction and physiology, making them potential therapeutic targets. However, their roles in GBM pathogenesis remain unclear. This review explores ERs in GBM, focusing on their involvement in tumor immune evasion, modulation of the tumor microenvironment, and the mechanisms underlying GBM progression. Additionally, therapeutic opportunities targeting ERs for GBM treatment are discussed. Estrogen, synthesized primarily in ovaries and in smaller amounts by adrenal glands and fat tissues, regulates reproductive systems, bone density, skin health, and cardiovascular function. The invasive nature and heterogeneity of GBM complicate therapy development. Preclinical findings suggest that endocrine therapy with hormone receptor agonists or antagonists can extend patient survival and improve post-treatment quality of life. The ERβ pathway, in particular, shows tumor-suppressive potential, limiting glioma progression with fewer side effects. ERβ agonists could become a novel drug class for GBM treatment. Identifying biomarkers and specific therapeutic targets is crucial for early detection and improved prognosis. Estrogen and its receptors are advantageous for GBM treatment due to their regulation of numerous biological processes, ability to penetrate the blood-brain barrier, and genomic and non-genomic control of transcription, making them promising targets for GBM therapy.
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Affiliation(s)
- Asokan Madeshwaran
- Saveetha Medical College, Saveetha Institute of Medical and Technical Sciences, Chennai, Tamil Nadu, India
| | - Periyasamy Vijayalakshmi
- Department of Biotechnology and Bioinformatics, Holy Cross College (Autonomous), Tiruchirappalli, Tamil Nadu, India
| | - Vidhya Rekha Umapathy
- Department of Public Health Dentistry, Thai Moogambigai Dental College and Hospital, Chennai, Tamil Nadu, India
| | - Rajeshkumar Shanmugam
- Nano Biomedicine Lab, Center for Global Health Research, Saveetha Medical College, Saveetha Institute of Medical and Technical Sciences, Chennai, Tamil Nadu, India
| | - Chandrabose Selvaraj
- CsrDD LAB, Center for Global Health Research, Saveetha Medical College, Saveetha Institute of Medical and Technical Sciences, Chennai, Tamil Nadu, India.
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Ismail M, Kanapathipillai M. Novel Ultrasound-Responsive Amyloid Formulation. Pharmaceuticals (Basel) 2024; 17:777. [PMID: 38931443 PMCID: PMC11206591 DOI: 10.3390/ph17060777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Revised: 06/04/2024] [Accepted: 06/11/2024] [Indexed: 06/28/2024] Open
Abstract
Amyloid aggregates have attracted significant interest in regard to diverse biomedical applications, particularly in the field of drug delivery. Here, we report novel amyloid aggregates based on a 12-amino-acid peptide from the amyloidogenic region of the receptor-interacting kinase 3 (RIP3) protein and a thermoresponsive triblock copolymer, namely, Pluronic F127 (RIP3/F127). Physicochemical characterization was performed to determine the aggregation size, morphology, and stimuli-responsive properties. The potential of the aggregates as a drug depot was assessed in lung cancer cells, using Doxorubicin (Dox) as a model drug. The results show that RIP3 and RIP3/F127 exhibit amyloidogenic properties. Further, the RIP3/F127 amyloids exhibited significant ultrasound-responsive properties compared to amyloid aggregates without Pluronic F127. Moreover, the RIP3/F127/Dox amyloid formulations that were subjected to ultrasound treatment exhibited greater toxicity to lung cancer cells compared to that of Dox alone at equal concentrations. Overall, the results from this proof-of-concept study show that amyloidogenic peptide aggregates with stimuli-responsive properties can be utilized as efficient drug delivery depots.
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Yue Z, Zhu Y, Chen T, Feng T, Zhou Y, Zhang J, Zhang N, Yang J, Luo G, Wang Z. Bletilla striata polysaccharide-coated andrographolide nanomicelles for targeted drug delivery to enhance anti-colon cancer efficacy. Front Immunol 2024; 15:1380229. [PMID: 38911867 PMCID: PMC11190162 DOI: 10.3389/fimmu.2024.1380229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 05/27/2024] [Indexed: 06/25/2024] Open
Abstract
Background Vitamin E, which is also known as tocopherol, is a compound with a polyphenol structure. Its esterified derivative, Vitamin E succinate (VES), exhibits unique anticancer and healthcare functions as well as immunomodulatory effects. Natural polysaccharides are proved to be a promising material for nano-drug delivery systems, which show excellent biodegradability and biocompatibility. In this study, we employed a novel bletilla striata polysaccharide-vitamin E succinate polymer (BSP-VES) micelles to enhance the tumor targeting and anti-colon cancer effect of andrographolide (AG). Methods BSP-VES polymer was synthesized through esterification and its structure was confirmed using 1H NMR. AG@BSP-VES was prepared via the dialysis method and the drug loading, entrapment efficiency, stability, and safety were assessed. Furthermore, the tumor targeting ability of AG@BSP-VES was evaluated through targeted cell uptake and in vivo imaging. The antitumor activity of AG@BSP-VES was measured in vitro using MTT assay, Live&Dead cell staining, and cell scratch test. Results In this study, we successfully loaded AG into BSP-VES micelles (AG@BSP-VES), which exhibited good stability, biosafety and sustained release effect. In addition, AG@BSP-VES also showed excellent internalization capability into CT26 cells compared with NCM460 cells in vitro. Meanwhile, the specific delivery of AG@BSP-VES micelles into subcutaneous and in-situ colon tumors was observed compared with normal colon tissues in vivo during the whole experiment process (1-24 h). What's more, AG@BSP-VES micelles exhibited significant antitumor activities than BSP-VES micelles and free AG. Conclusion The study provides a meaningful new idea and method for application in drug delivery system and targeted treatment of colon cancer based on natural polysaccharides.
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Affiliation(s)
- Zhongqun Yue
- College of Pharmaceutical Sciences, Guizhou University of Traditional Chinese Medicine, Guiyang, China
- Nano-drug Technology Research Center of Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Yue Zhu
- College of Pharmaceutical Sciences, Guizhou University of Traditional Chinese Medicine, Guiyang, China
- Nano-drug Technology Research Center of Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Teng Chen
- College of Pharmaceutical Sciences, Guizhou University of Traditional Chinese Medicine, Guiyang, China
- Nano-drug Technology Research Center of Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Tingting Feng
- College of Pharmaceutical Sciences, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Ying Zhou
- College of Pharmaceutical Sciences, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Jiaojiao Zhang
- College of Food and Health, Zhejiang A&F University, Hangzhou, China
| | - Ning Zhang
- School of Acupuncture-Moxibustion and Tuina of Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Jing Yang
- College of Pharmaceutical Sciences, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Gang Luo
- Key Laboratory of Medical Microbiology and Parasitology and Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
| | - Zuhua Wang
- College of Pharmaceutical Sciences, Guizhou University of Traditional Chinese Medicine, Guiyang, China
- Nano-drug Technology Research Center of Guizhou University of Traditional Chinese Medicine, Guiyang, China
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7
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Nam EJ, Cho I, Park H, Paik SR. Multifactorial drug carrier system bringing both chemical and physical therapeutics to the treatment of tumor heterogeneity. J Control Release 2024; 369:101-113. [PMID: 38508524 DOI: 10.1016/j.jconrel.2024.03.033] [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: 11/12/2023] [Revised: 02/22/2024] [Accepted: 03/16/2024] [Indexed: 03/22/2024]
Abstract
Tumor heterogeneity and drug resistance have been invincible features of cancer for its complete cure. Despite the advent of immunotherapy, the expansion and diversification of cancer cells evolved even in the absence or presence of drug treatment discourage additional therapeutic interventions. For the eradication of cancer cells, therefore, an 'all-at-once' strategy is required, which exploits both target-selective chemotherapy and non-selective physicotherapy. Multifactorial microcapsules comprising gold nanoparticles (AuNPs) and a self-assembly protein of α-synuclein (αS) were fabricated, in which hydrophobic and hydrophilic drugs could be separately encapsulated by employing lipid-based inverted micelles (IMs). Their combined physico-chemical therapeutic effects were examined since they also contained both membrane-disrupting IMs and heat-generating AuNPs upon irradiation as physicotherapeutic agents. For the optimal enclosure of IMs containing hydrophilic drugs, a porous inner skeleton made of poly(lactic-co-glycolic acid) was introduced, which would play the roles of not only compartmentalizing the internal space but also enhancing proteolytic disintegration of the microcapsules to discharge and stabilize IMs to the outside. In fact, hydrophobic paclitaxel and hydrophilic doxorubicin showed markedly enhanced drug efficacy when delivered in the IM-containing microcapsules exhibiting the 'quantal' release of both drugs into the cells whose integrity could be also affected by the IMs. In addition, the remnants of αS-AuNP microcapsules produced via proteolysis also caused cell death through photothermal effect. The multifactorial microcapsules are therefore considered as a promising anti-cancer drug carrier capable of performing combinatorial selective and non-selective chemical and physical therapies to overcome tumor heterogeneity and drug resistance.
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Affiliation(s)
- Eun-Jeong Nam
- School of Chemical and Biological Engineering, Institute of Engineering Research, College of Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Inyoung Cho
- Interdisciplinary program of Bioengineering, College of Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyeji Park
- School of Chemical and Biological Engineering, Institute of Engineering Research, College of Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Seung R Paik
- School of Chemical and Biological Engineering, Institute of Engineering Research, College of Engineering, Seoul National University, Seoul 08826, Republic of Korea; Interdisciplinary program of Bioengineering, College of Engineering, Seoul National University, Seoul 08826, Republic of Korea.
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Herman H, Rata DM, Cadinoiu AN, Atanase LI, Hermenean A. Colloidal and Biological Characterization of Dual Drug-Loaded Smart Micellar Systems. Polymers (Basel) 2024; 16:1189. [PMID: 38732658 PMCID: PMC11085147 DOI: 10.3390/polym16091189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 04/20/2024] [Accepted: 04/23/2024] [Indexed: 05/13/2024] Open
Abstract
Smart polymeric micelles (PMs) are of great interest in drug delivery owing to their low critical micellar concentration and sizes. In the present study, two different pH-sensitive poly(2-vinyl pyridine)-b-poly(ethylene oxide) (P2VP-b-PEO) copolymer samples were used for the encapsulation of paclitaxel (PTX), ursolic acid (UA), and dual loading of PTX and UA. Based on the molecular features of copolymers, spherical PMs with sizes of around 35 nm and 140 nm were obtained by dialysis for P2VP55-b-PEO284 and P2VP274-b-PEO1406 samples, respectively. The micellar sizes increased after loading of both drugs. Moreover, drug encapsulation and loading efficiencies varied from 53 to 94% and from 3.2 to 18.7% as a function of the copolymer/drug ratio, molar mass of copolymer sample, and drug type. By FT-IR spectroscopy, it was possible to demonstrate the drug loading and the presence of some interactions between the polymer matrix and loaded drugs. In vitro viability was studied on 4T1 mammary carcinoma mouse cells as a function of time and concentration of drug-loaded PMs. UA-PMs and free PMs alone were not effective in inhibiting the tumor cell growth whereas a viability of 40% was determined for cells treated with both PTX- and PTX/UA-loaded PMs. A synergic effect was noticed for PTX/UA-loaded PMs.
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Affiliation(s)
- Hildegard Herman
- “Aurel Ardelean” Institute of Life Sciences, Vasile Goldis Western University, Rebreanu Street, No. 86, 310414 Arad, Romania; (H.H.); (A.H.)
| | - Delia M. Rata
- Faculty of Medicine, “Apollonia” University of Iasi, Pacurari Street, No. 11, 700511 Iasi, Romania; (D.M.R.); (A.N.C.)
| | - Anca N. Cadinoiu
- Faculty of Medicine, “Apollonia” University of Iasi, Pacurari Street, No. 11, 700511 Iasi, Romania; (D.M.R.); (A.N.C.)
| | - Leonard I. Atanase
- Faculty of Medicine, “Apollonia” University of Iasi, Pacurari Street, No. 11, 700511 Iasi, Romania; (D.M.R.); (A.N.C.)
- Academy of Romanian Scientists, 050045 Bucharest, Romania
| | - Anca Hermenean
- “Aurel Ardelean” Institute of Life Sciences, Vasile Goldis Western University, Rebreanu Street, No. 86, 310414 Arad, Romania; (H.H.); (A.H.)
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Song H, Li H, Shen X, Liu K, Feng H, Cui J, Wei W, Sun X, Fan Q, Bao W, Zhou H, Qian L, Nie H, Cheng X, Du Z. A pH-responsive cetuximab-conjugated DMAKO-20 nano-delivery system for overcoming K-ras mutations and drug resistance in colorectal carcinoma. Acta Biomater 2024; 177:456-471. [PMID: 38331131 DOI: 10.1016/j.actbio.2024.01.047] [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: 10/16/2023] [Revised: 01/17/2024] [Accepted: 01/31/2024] [Indexed: 02/10/2024]
Abstract
Cetuximab (Cet) and oxaliplatin (OXA) are used as first-line drugs for patients with colorectal carcinoma (CRC). In fact, the heterogeneity of CRC, mainly caused by K-ras mutations and drug resistance, undermines the effectiveness of drugs. Recently, a hydrophobic prodrug, (1E,4E)-6-((S)-1-(isopentyloxy)-4-methylpent-3-en-1-yl)-5,8-dimethoxynaphthalene-1,4‑dione dioxime (DMAKO-20), has been shown to undergo tumor-specific CYP1B1-catalyzed bioactivation. This process results in the production of nitric oxide and active naphthoquinone mono-oximes, which exhibit specific antitumor activity against drug-resistant CRC. In this study, a Cet-conjugated bioresponsive DMAKO-20/PCL-PEOz-targeted nanocodelivery system (DMAKO@PCL-PEOz-Cet) was constructed to address the issue of DMAKO-20 dissolution and achieve multitargeted delivery of the cargoes to different subtypes of CRC cells to overcome K-ras mutations and drug resistance in CRC. The experimental results demonstrated that DMAKO@PCL-PEOz-Cet efficiently delivered DMAKO-20 to both K-ras mutant and wild-type CRC cells by targeting the epidermal growth factor receptor (EGFR). It exhibited a higher anticancer effect than OXA in K-ras mutant cells and drug-resistant cells. Additionally, it was observed that DMAKO@PCL-PEOz-Cet reduced the expression of glutathione peroxidase 4 (GPX4) in CRC cells and significantly inhibited the growth of heterogeneous HCT-116 subcutaneous tumors and patient-derived tumor xenografts (PDX) model tumors. This work provides a new strategy for the development of safe and effective approaches for treating CRC. STATEMENT OF SIGNIFICANCE: (1) Significance: This work reports a new approach for the treatment of colorectal carcinoma (CRC) using the bioresponsible Cet-conjugated PCL-PEOz/DMAKO-20 nanodelivery system (DMAKO@PCL-PEOz-Cet) prepared with Cet and PCL-PEOz for the targeted transfer of DMAKO-20, which is an anticancer multitarget drug that can even prevent drug resistance, to wild-type and K-ras mutant CRC cells. DMAKO@PCL-PEOz-Cet, in the form of nanocrystal micelles, maintained stability in peripheral blood and efficiently transported DMAKO-20 to various subtypes of colorectal carcinoma cells, overcoming the challenges posed by K-ras mutations and drug resistance. The system's secure and effective delivery capabilities have also been confirmed in organoid and PDX models. (2) This is the first report demonstrating that this approach simultaneously overcomes the K-ras mutation and drug resistance of CRC.
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Affiliation(s)
- Huiling Song
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, and School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Haosheng Li
- Department of General Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai 200025, China; Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai 200025, China
| | - Xiaonan Shen
- Department of Gastroenterology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai 200025, China
| | - Kuai Liu
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, and School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Haoran Feng
- Department of General Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai 200025, China; Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai 200025, China
| | - Jiahua Cui
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Wei Wei
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, and School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Xiaolu Sun
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, and School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Qiong Fan
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, 910 Hengshan Road, Shanghai 200030, China
| | - Wei Bao
- Department of Obstetrics and Gynecology, Shanghai General Hospital affiliated with Shanghai Jiao Tong University, 100 Haining Road, Shanghai 200080, China
| | - Haiyan Zhou
- Genetics and Genomic Medicine Department, Great Ormond Street Institute of Child Health, NIHR Great Ormond Street Hospital Biomedical Research Centre, University College London, 30 Guilford Street, London WC1N 1EH, United Kingdom
| | - Liheng Qian
- State Key Laboratory of Systems Medicine for Cancer, Shanghai Cancer Institute, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Huizhen Nie
- State Key Laboratory of Systems Medicine for Cancer, Shanghai Cancer Institute, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Xi Cheng
- Department of General Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai 200025, China; Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai 200025, China.
| | - Zixiu Du
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, and School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China.
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Wang H, Polara H, Bhadran A, Shah T, Babanyinah GK, Ma Z, Calubaquib EL, Miller JT, Biewer MC, Stefan MC. Effect of aromatic substituents on thermoresponsive functional polycaprolactone micellar carriers for doxorubicin delivery. Front Pharmacol 2024; 15:1356639. [PMID: 38500763 PMCID: PMC10945023 DOI: 10.3389/fphar.2024.1356639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 01/19/2024] [Indexed: 03/20/2024] Open
Abstract
Amphiphilic functional polycaprolactone (PCL) diblock copolymers are excellent candidates for micellar drug delivery. The functional groups on the backbone significantly affect the properties of PCL. A systematic investigation of the effect of aromatic substituents on the self-assembly of γ-functionalized PCLs and the delivery of doxorubicin (DOX) is presented in this work. Three thermoresponsive amphiphilic diblock copolymers with poly(γ-benzyloxy-ε-caprolactone) (PBnCL), poly(γ-phenyl- ε-caprolactone) (PPhCL), poly(γ-(4-ethoxyphenyl)-ε-caprolactone) (PEtOPhCL), respectively, as hydrophobic block and γ-tri(ethylene glycol) functionalized PCL (PME3CL) as hydrophilic block were prepared through ring-opening polymerization (ROP). The thermoresponsivity, thermodynamic stability, micelle size, morphology, DOX-loading, and release profile were determined. The LCST values of amphiphilic diblock copolymers PME3CL-b-PBnCL, PME3CL-b-PPhCL, and PME3CL-b-PEtOPhCL are 74.2°C, 43.3°C, and 37.3°C, respectively. All three copolymers formed spherical micelles in phosphate-buffered saline (PBS, 1×, pH = 7.4) at low concentrations ranging from 8.7 × 10-4 g/L to 8.9 × 10-4 g/L. PME3CL-b-PBnCL micelles showed the highest DOX loading capacity of 3.01 ± 0.18 (wt%) and the lowest drug release, while PME3CL-b-PEtOPhCL micelles exhibited the lowest DOX loading capacity of 1.95 ± 0.05 (wt%) and the highest drug release. Cytotoxicity and cellular uptake of all three micelles were assessed in vitro using MDA-MB-231 breast cancer cells. All three empty micelles did not show significant toxicity to the cells at concentrations high up to 0.5 mg/mL. All three DOX-loaded micelles were uptaken into the cells, and DOX was internalized into the nucleus of the cells.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Michael C. Biewer
- Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson, TX, United States
| | - Mihaela C. Stefan
- Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson, TX, United States
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11
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Kowalski S, Karska J, Tota M, Skinderowicz K, Kulbacka J, Drąg-Zalesińska M. Natural Compounds in Non-Melanoma Skin Cancer: Prevention and Treatment. Molecules 2024; 29:728. [PMID: 38338469 PMCID: PMC10856721 DOI: 10.3390/molecules29030728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/27/2024] [Accepted: 02/01/2024] [Indexed: 02/12/2024] Open
Abstract
The elevated occurrence of non-melanoma skin cancer (NMSC) and the adverse effects associated with available treatments adversely impact the quality of life in multiple dimensions. In connection with this, there is a necessity for alternative approaches characterized by increased tolerance and lower side effects. Natural compounds could be employed due to their safety profile and effectiveness for inflammatory and neoplastic skin diseases. These anti-cancer drugs are often derived from natural sources such as marine, zoonotic, and botanical origins. Natural compounds should exhibit anti-carcinogenic actions through various pathways, influencing apoptosis potentiation, cell proliferation inhibition, and metastasis suppression. This review provides an overview of natural compounds used in cancer chemotherapies, chemoprevention, and promotion of skin regeneration, including polyphenolic compounds, flavonoids, vitamins, alkaloids, terpenoids, isothiocyanates, cannabinoids, carotenoids, and ceramides.
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Affiliation(s)
- Szymon Kowalski
- Faculty of Medicine, Wroclaw Medical University, Pasteura 1, 50-367 Wroclaw, Poland; (S.K.); (M.T.); (K.S.)
| | - Julia Karska
- Department of Psychiatry, Wroclaw Medical University, Pasteura 10, 50-367 Wroclaw, Poland;
| | - Maciej Tota
- Faculty of Medicine, Wroclaw Medical University, Pasteura 1, 50-367 Wroclaw, Poland; (S.K.); (M.T.); (K.S.)
| | - Katarzyna Skinderowicz
- Faculty of Medicine, Wroclaw Medical University, Pasteura 1, 50-367 Wroclaw, Poland; (S.K.); (M.T.); (K.S.)
| | - Julita Kulbacka
- Department of Molecular and Cellular Biology, Faculty of Pharmacy, Wroclaw Medical University, Borowska 211A, 50-556 Wroclaw, Poland
- Department of Immunology and Bioelectrochemistry, State Research Institute Centre for Innovative Medicine, Santariškių 5, 08410 Vilnius, Lithuania
| | - Małgorzata Drąg-Zalesińska
- Department of Human Morphology and Embryology, Division of Histology and Embryology, Faculty of Medicine, Wroclaw Medical University, T. Chalubińskiego 6a, 50-368 Wroclaw, Poland;
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12
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Maffeis V, Heuberger L, Nikoletić A, Schoenenberger C, Palivan CG. Synthetic Cells Revisited: Artificial Cells Construction Using Polymeric Building Blocks. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2305837. [PMID: 37984885 PMCID: PMC10885666 DOI: 10.1002/advs.202305837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 10/06/2023] [Indexed: 11/22/2023]
Abstract
The exponential growth of research on artificial cells and organelles underscores their potential as tools to advance the understanding of fundamental biological processes. The bottom-up construction from a variety of building blocks at the micro- and nanoscale, in combination with biomolecules is key to developing artificial cells. In this review, artificial cells are focused upon based on compartments where polymers are the main constituent of the assembly. Polymers are of particular interest due to their incredible chemical variety and the advantage of tuning the properties and functionality of their assemblies. First, the architectures of micro- and nanoscale polymer assemblies are introduced and then their usage as building blocks is elaborated upon. Different membrane-bound and membrane-less compartments and supramolecular structures and how they combine into advanced synthetic cells are presented. Then, the functional aspects are explored, addressing how artificial organelles in giant compartments mimic cellular processes. Finally, how artificial cells communicate with their surrounding and each other such as to adapt to an ever-changing environment and achieve collective behavior as a steppingstone toward artificial tissues, is taken a look at. Engineering artificial cells with highly controllable and programmable features open new avenues for the development of sophisticated multifunctional systems.
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Affiliation(s)
- Viviana Maffeis
- Department of ChemistryUniversity of BaselMattenstrasse 22BaselCH‐4002Switzerland
- NCCR‐Molecular Systems EngineeringBPR 1095, Mattenstrasse 24aBaselCH‐4058Switzerland
| | - Lukas Heuberger
- Department of ChemistryUniversity of BaselMattenstrasse 22BaselCH‐4002Switzerland
| | - Anamarija Nikoletić
- Department of ChemistryUniversity of BaselMattenstrasse 22BaselCH‐4002Switzerland
- Swiss Nanoscience InstituteUniversity of BaselKlingelbergstrasse 82BaselCH‐4056Switzerland
| | | | - Cornelia G. Palivan
- Department of ChemistryUniversity of BaselMattenstrasse 22BaselCH‐4002Switzerland
- NCCR‐Molecular Systems EngineeringBPR 1095, Mattenstrasse 24aBaselCH‐4058Switzerland
- Swiss Nanoscience InstituteUniversity of BaselKlingelbergstrasse 82BaselCH‐4056Switzerland
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13
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Avgoustakis K, Angelopoulou A. Biomaterial-Based Responsive Nanomedicines for Targeting Solid Tumor Microenvironments. Pharmaceutics 2024; 16:179. [PMID: 38399240 PMCID: PMC10892652 DOI: 10.3390/pharmaceutics16020179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/16/2024] [Accepted: 01/23/2024] [Indexed: 02/25/2024] Open
Abstract
Solid tumors are composed of a highly complex and heterogenic microenvironment, with increasing metabolic status. This environment plays a crucial role in the clinical therapeutic outcome of conventional treatments and innovative antitumor nanomedicines. Scientists have devoted great efforts to conquering the challenges of the tumor microenvironment (TME), in respect of effective drug accumulation and activity at the tumor site. The main focus is to overcome the obstacles of abnormal vasculature, dense stroma, extracellular matrix, hypoxia, and pH gradient acidosis. In this endeavor, nanomedicines that are targeting distinct features of TME have flourished; these aim to increase site specificity and achieve deep tumor penetration. Recently, research efforts have focused on the immune reprograming of TME in order to promote suppression of cancer stem cells and prevention of metastasis. Thereby, several nanomedicine therapeutics which have shown promise in preclinical studies have entered clinical trials or are already in clinical practice. Various novel strategies were employed in preclinical studies and clinical trials. Among them, nanomedicines based on biomaterials show great promise in improving the therapeutic efficacy, reducing side effects, and promoting synergistic activity for TME responsive targeting. In this review, we focused on the targeting mechanisms of nanomedicines in response to the microenvironment of solid tumors. We describe responsive nanomedicines which take advantage of biomaterials' properties to exploit the features of TME or overcome the obstacles posed by TME. The development of such systems has significantly advanced the application of biomaterials in combinational therapies and in immunotherapies for improved anticancer effectiveness.
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Affiliation(s)
- Konstantinos Avgoustakis
- Department of Pharmacy, School of Health Sciences, University of Patras, 26504 Patras, Greece;
- Clinical Studies Unit, Biomedical Research Foundation Academy of Athens (BRFAA), 4 Soranou Ephessiou Street, 11527 Athens, Greece
| | - Athina Angelopoulou
- Department of Chemical Engineering, Polytechnic School, University of Patras, 26504 Patras, Greece
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14
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Gianessi L, Magini A, Dominici R, Giovagnoli S, Dolcetta D. A Stable Micellar Formulation of RAD001 for Intracerebroventricular Delivery and the Treatment of Alzheimer's Disease and Other Neurological Disorders. Int J Mol Sci 2023; 24:17478. [PMID: 38139306 PMCID: PMC10744130 DOI: 10.3390/ijms242417478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 11/30/2023] [Accepted: 12/08/2023] [Indexed: 12/24/2023] Open
Abstract
A large body of evidence, replicated in many mouse models of Alzheimer's disease (AD), supports the therapeutic efficacy of the oral mammalian target of rapamycin inhibitors (mTOR-Is). Our preliminary data show that intracerebroventricular (ICV) administration of everolimus (RAD001) soon after clinical onset greatly diminished cognitive impairment and the intracellular beta amyloid and neurofibrillary tangle load. However, RAD001 shows >90% degradation after 7 days in solution at body temperature, thus hampering the development of proper therapeutic regimens for patients. To overcome such a drawback, we developed a stable, liquid formulation of mTOR-Is by loading RAD001 into distearoylphosphatidylethanolamine-polyethylene glycol 2000 (DSPE-PEG2000) micelles using the thin layer evaporation method. The formulation showed efficient encapsulation of RAD001 and a homogeneous colloidal size and stabilised RAD001, with over 95% of activity preserved after 14 days at 37 °C with a total decay only occurring after 98 days. RAD001-loaded DSPE-PEG2000 micelles were unchanged when stored at 4 and 25 °C over the time period investigated. The obtained formulation may represent a suitable platform for expedited clinical translation and effective therapeutic regimens in AD and other neurological diseases.
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Affiliation(s)
- Laura Gianessi
- Department of Pharmaceutical Sciences, University of Perugia, 06123 Perugia, Italy (S.G.)
| | | | - Roberto Dominici
- Department of Biochemistry, Desio Hospital, ASST-Brianza, 20832 Desio, Italy
| | - Stefano Giovagnoli
- Department of Pharmaceutical Sciences, University of Perugia, 06123 Perugia, Italy (S.G.)
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15
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Zustiak SP, Jain E. Feature Reviews in Pharmaceutical Technology. Pharmaceuticals (Basel) 2023; 16:1336. [PMID: 37895807 PMCID: PMC10609981 DOI: 10.3390/ph16101336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 09/19/2023] [Indexed: 10/29/2023] Open
Abstract
We are excited to present the Special Issue, "Feature Reviews in Pharmaceutical Technology", aiming to highlight exciting developments in pharmaceutical technologies [...].
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Affiliation(s)
| | - Era Jain
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, NY 13244, USA
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16
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Harun-Ur-Rashid M, Jahan I, Foyez T, Imran AB. Bio-Inspired Nanomaterials for Micro/Nanodevices: A New Era in Biomedical Applications. MICROMACHINES 2023; 14:1786. [PMID: 37763949 PMCID: PMC10536921 DOI: 10.3390/mi14091786] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 09/14/2023] [Accepted: 09/16/2023] [Indexed: 09/29/2023]
Abstract
Exploring bio-inspired nanomaterials (BINMs) and incorporating them into micro/nanodevices represent a significant development in biomedical applications. Nanomaterials, engineered to imitate biological structures and processes, exhibit distinctive attributes such as exceptional biocompatibility, multifunctionality, and unparalleled versatility. The utilization of BINMs demonstrates significant potential in diverse domains of biomedical micro/nanodevices, encompassing biosensors, targeted drug delivery systems, and advanced tissue engineering constructs. This article thoroughly examines the development and distinctive attributes of various BINMs, including those originating from proteins, DNA, and biomimetic polymers. Significant attention is directed toward incorporating these entities into micro/nanodevices and the subsequent biomedical ramifications that arise. This review explores biomimicry's structure-function correlations. Synthesis mosaics include bioprocesses, biomolecules, and natural structures. These nanomaterials' interfaces use biomimetic functionalization and geometric adaptations, transforming drug delivery, nanobiosensing, bio-inspired organ-on-chip systems, cancer-on-chip models, wound healing dressing mats, and antimicrobial surfaces. It provides an in-depth analysis of the existing challenges and proposes prospective strategies to improve the efficiency, performance, and reliability of these devices. Furthermore, this study offers a forward-thinking viewpoint highlighting potential avenues for future exploration and advancement. The objective is to effectively utilize and maximize the application of BINMs in the progression of biomedical micro/nanodevices, thereby propelling this rapidly developing field toward its promising future.
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Affiliation(s)
- Mohammad Harun-Ur-Rashid
- Department of Chemistry, International University of Business Agriculture and Technology, Dhaka 1230, Bangladesh;
| | - Israt Jahan
- Department of Cell Physiology, Graduate School of Medicine, Nagoya University, Nagoya 466-8550, Japan;
| | - Tahmina Foyez
- Department of Pharmacy, United International University, Dhaka 1212, Bangladesh;
| | - Abu Bin Imran
- Department of Chemistry, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh
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Kamenova K, Radeva L, Konstantinov S, Petrov PD, Yoncheva K. Copolymeric Micelles of Poly(ε-caprolactone) and Poly(methacrylic acid) as Carriers for the Oral Delivery of Resveratrol. Polymers (Basel) 2023; 15:3769. [PMID: 37765623 PMCID: PMC10537763 DOI: 10.3390/polym15183769] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 09/06/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023] Open
Abstract
In this study, we report the development of a micellar system based on a poly(methacrylic acid)-b-poly(ε-caprolactone)-b-poly(methacrylic acid) triblock copolymer (PMAA16-b-PCL35-b-PMAA16) for the oral delivery of resveratrol. The micellar nanocarriers were designed to comprise a PCL core for solubilizing the poorly water-soluble drug and a hydrated PMAA corona with bioadhesive properties for providing better contact with the gastrointestinal mucosa. The micelles were first formed in an aqueous media via the solvent evaporation method and then loaded with resveratrol (72% encapsulation efficiency). Studies by transmission electron microscopy (TEM) and dynamic and electrophoretic light scattering (DLS and PALS) revealed a spherical shape, nanoscopic size (100 nm) and a negative surface charge (-30 mV) of the nanocarriers. Loading of the drug slightly decreased the hydrodynamic diameter (Dh) and increased the ƺ-potential of micelles. In vitro dissolution tests showed that 80% and 100% of resveratrol were released in 24 h in buffers with pH 1.2 and 6.8, respectively, whereas for the same time, not more than 10% of pure resveratrol was dissolved. A heat-induced albumin denaturation assay demonstrated the advantage of the aqueous micellar formulation of resveratrol, which possessed anti-inflammatory potential as high as that of the pure drug. Further, the micellar resveratrol (5 µM) exerted a strong protective effect and maintained viability of mucosa epithelial HT-29 cells in a co-cultural model, representing the production of inflammatory cytokines. For comparison, the pure resveratrol at the same concentration did not protect the damaged HT-29 cells at all. Thus, the present study revealed that the PMAA-b-PCL-b-PMAA copolymeric micelles might be considered appropriate nanocarriers for the oral delivery of resveratrol.
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Affiliation(s)
- Katya Kamenova
- Institute of Polymers, Bulgarian Academy of Sciences, Akad. G. Bonchev Str. 103A, 1113 Sofia, Bulgaria;
| | - Lyubomira Radeva
- Faculty of Pharmacy, Medical University of Sofia, 2 Dunav Str., 1000 Sofia, Bulgaria; (L.R.); (S.K.)
| | - Spiro Konstantinov
- Faculty of Pharmacy, Medical University of Sofia, 2 Dunav Str., 1000 Sofia, Bulgaria; (L.R.); (S.K.)
| | - Petar D. Petrov
- Institute of Polymers, Bulgarian Academy of Sciences, Akad. G. Bonchev Str. 103A, 1113 Sofia, Bulgaria;
| | - Krassimira Yoncheva
- Faculty of Pharmacy, Medical University of Sofia, 2 Dunav Str., 1000 Sofia, Bulgaria; (L.R.); (S.K.)
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