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Rocha MS, Batista JVC, Melo MNO, de Campos VEB, Toledo ALMM, Oliveira AP, Picciani PHS, Baumgartner S, Holandino C. Pluronic ® F127 Thermoresponsive Viscum album Hydrogel: Physicochemical Features and Cellular In Vitro Evaluation. Pharmaceutics 2022; 14:pharmaceutics14122775. [PMID: 36559269 PMCID: PMC9788499 DOI: 10.3390/pharmaceutics14122775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 12/02/2022] [Accepted: 12/08/2022] [Indexed: 12/14/2022] Open
Abstract
Viscum album L., popularly known as mistletoe, is well known for its anti-cancer properties, and the pharmaceutical application of hydroalcoholic dry extracts is still limited due to its low solubility in aqueous media, and physicochemical instability. The Pluronic® F127 is an amphiphilic polymer, which permits the solubilization of lipophilic and hydrophilic compounds. In this investigation, physicochemical features of hydrogel containing V. album dry extract (VADE-loaded-hydrogel) were performed by: dynamic light scattering (DLS), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and transmission electron microscopy (TEM). VADE-loaded-hydrogel presented nanometer-size micelles with volume distribution ranging from 10.58 nm to 246.7 nm, and a polydispersity index of 0.441. The sample thermal analyses (TG and DSC) showed similar decomposition curves; however, the thermal events indicated an increase in thermal stability in relation to the presence of the extract. In addition to these interesting pharmaceutical features, IC50 values of 333.40 µg/mL and >1000 µg/mL were obtained when tumor (SCC-25) and non-tumor (L929) cells were incubated with VADE-loaded-hydrogel, respectively. The optical and ultrastructural cellular analysis confirmed the tumor selectivity since the following alterations were detected only in SCC-25 cells: disorganization of plasmatic membrane; an increase of cytoplasmatic vacuole size; alteration in the cristae mitochondrial shape; and generation of amorphous cellular material. These results emphasize the promising antitumoral potential of VADE-loaded-hydrogel as an herbal drug delivery system via in vitro assays.
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Affiliation(s)
- Mariana S. Rocha
- Multidisciplinary Laboratory of Pharmaceutical Sciences, Faculty of Pharmacy, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - João V. C. Batista
- Society for Cancer Research, Hiscia Institute, 4144 Arlesheim, Switzerland
- Department of Pharmaceutical Sciences, Division of Pharmaceutical Technology, University of Basel, 4056 Basel, Switzerland
| | - Michelle N. O. Melo
- Multidisciplinary Laboratory of Pharmaceutical Sciences, Faculty of Pharmacy, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Vania E. B. de Campos
- Multidisciplinary Laboratory of Pharmaceutical Sciences, Faculty of Pharmacy, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
- Department of Pharmacy, Universidade do Estado do Rio de Janeiro, Rio de Janeiro 23070-200, Brazil
| | - Anna Lecticia M. M. Toledo
- Institute of Macromolecules Professora Eloisa Mano, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-598, Brazil
| | - Adriana P. Oliveira
- Multidisciplinary Laboratory of Pharmaceutical Sciences, Faculty of Pharmacy, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Paulo H. S. Picciani
- Institute of Macromolecules Professora Eloisa Mano, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-598, Brazil
| | - Stephan Baumgartner
- Society for Cancer Research, Hiscia Institute, 4144 Arlesheim, Switzerland
- Institute of Integrative Medicine, University of Witten/Herdecke, 58455 Witten, Germany
- Institute of Complementary and Integrative Medicine, University of Bern, 3012 Bern, Switzerland
- Correspondence: (S.B.); (C.H.)
| | - Carla Holandino
- Multidisciplinary Laboratory of Pharmaceutical Sciences, Faculty of Pharmacy, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
- Society for Cancer Research, Hiscia Institute, 4144 Arlesheim, Switzerland
- Correspondence: (S.B.); (C.H.)
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Guarda MB, Pacheco RR, Silva ID, Brandt WC, Sinhoreti MAC, Vitti RP. Microtensile bond strength of resin composite to dentin using different adhesive systems and directions of electric current. Braz Dent J 2022; 33:86-93. [PMID: 36477969 PMCID: PMC9733368 DOI: 10.1590/0103-6440202204870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 09/06/2022] [Indexed: 12/12/2022] Open
Abstract
Thisstudy aimed to evaluate the effect of the electric current direction application on the resin composite-dentin bond strength using three adhesive systems. Human molar teeth were distributed according to the adhesive system (two-step self-etch - Clearfil SE Bond, Kuraray [CSE]; one-step self-etch - Single Bond Universal, 3M ESPE [SBU]; and two-step etch-and-rinse - Adper Single Bond 2, 3M ESPE [SB2]), electric current direction (without electric current - control, direct and reverse electric currents - 35µA), and storage time (24h - immediate and 6 months). Resin composite blocks (Filtek Z350XT, 3M ESPE) were bonded to dentin. The teeth/resin composites specimens were stored in distilled water at 37ºC for 24 hours and 6 months for the microtensile bond strength (µTBS) test (n = 10; ~12 sticks for each tooth). Failure patterns were analyzed on a stereomicroscope and classified as cohesive-dentin, cohesive-resin, adhesive or mixed. Adhesive penetration into dentin and hybrid layer formation were evaluated in a scanning electron microscope (n = 6). Data were submitted to a three-way ANOVA followed by Tukey's post hoc test (α = 0.05). There are no differences in µTBS when the adhesive systems were applied under direct and reverse electric currents, but both electric currents increased the µTBS for all adhesive systems. SBU showed the lowest µTBS values for control groups in both storage times and direct electric current in 6 months of storage. The adhesive failure pattern was more frequently observed in all groups. The electric current formed long resin tags for all adhesive systems. Storage for 6 months did not significantly decrease µTBS values. Both directions of electric current (positive and negative charges) at 35µA can increase the µTBS of the adhesive systems tested to dentin.
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Affiliation(s)
| | | | | | | | | | - Rafael Pino Vitti
- Herminio Ometto University Center, School of Dentistry, Araras, SP, Brazil
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Khona DK, Roy S, Ghatak S, Huang K, Jagdale G, Baker LA, Sen CK. Ketoconazole resistant Candida albicans is sensitive to a wireless electroceutical wound care dressing. Bioelectrochemistry 2021; 142:107921. [PMID: 34419917 PMCID: PMC8788813 DOI: 10.1016/j.bioelechem.2021.107921] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 07/27/2021] [Accepted: 07/31/2021] [Indexed: 01/22/2023]
Abstract
Wireless electroceutical dressing (WED) fabric kills bacteria and disrupts bacterial biofilm. This work tested, comparing with standard of care topical antibiotic ketoconazole, whether the weak electric field generated by WED is effective to manage infection caused by ketoconazole-resistant yeast Candida albicans. WED inhibited Candida albicans biofilm formation and planktonic growth. Unlike ketoconazole, WED inhibited yeast to hyphal transition and downregulated EAP1 curbing cell attachment. In response to WED-dependent down-regulation of biofilm-forming BRG1 and ROB1, BCR1 expression was markedly induced in what seems to be a futile compensatory response. WED induced NRG1 and TUP1, negative regulators of filamentation; it down-regulated EFG1, a positive regulator of hyphal pathway. Consistent with the anti-hyphal properties of WED, the expression of ALS3 and HWP1 were diminished. Ketoconazole failed to reproduce the effects of WED on NRG1, TUP1 and EFG1. WED blunted efflux pump activity; this effect was in direct contrast to that of ketoconazole. WED exposure compromised cellular metabolism. In the presence of ketoconazole, the effect was synergistic. Unlike ketoconazole, WED caused membrane depolarization, changes in cell wall composition and loss of membrane integrity. This work presents first evidence that weak electric field is useful in managing pathogens which are otherwise known to be antibiotic resistant.
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Affiliation(s)
- Dolly K Khona
- Indiana Center for Regenerative Medicine & Engineering, Indiana University Health Comprehensive Wound Center, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, United States
| | - Sashwati Roy
- Indiana Center for Regenerative Medicine & Engineering, Indiana University Health Comprehensive Wound Center, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, United States
| | - Subhadip Ghatak
- Indiana Center for Regenerative Medicine & Engineering, Indiana University Health Comprehensive Wound Center, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, United States
| | - Kaixiang Huang
- Department of Chemistry, Indiana University, Bloomington, IN 47405, United States
| | - Gargi Jagdale
- Department of Chemistry, Indiana University, Bloomington, IN 47405, United States
| | - Lane A Baker
- Department of Chemistry, Indiana University, Bloomington, IN 47405, United States
| | - Chandan K Sen
- Indiana Center for Regenerative Medicine & Engineering, Indiana University Health Comprehensive Wound Center, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, United States.
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Parry-Nweye E, Onukwugha NE, Balmuri SR, Shane JL, Kim D, Koo H, Niepa THR. Electrochemical Strategy for Eradicating Fluconazole-Tolerant Candida albicans Using Implantable Titanium. ACS Appl Mater Interfaces 2019; 11:40997-41008. [PMID: 31603300 DOI: 10.1021/acsami.9b09977] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A persistent problem in modern health care derives from the overwhelming presence of antibiotic-resistant microbes on biomaterials, more specifically, fungal growth on metal-based implants. This study seeks to investigate the antifungal properties of low-level electrochemical treatments delivered using titanium electrodes against Candida albicans. We show that C. albicans can be readily controlled with electrical currents/potentials, reducing the number of viable planktonic cells by 99.7% and biofilm cells by 96.0-99.99%. Additionally, this study explores the ability of the electrochemical treatments to potentiate fluconazole, a clinically used antifungal drug. We have found that electrochemical treatment substantially enhances fluconazole killing activity. While fluconazole alone exhibits a low efficiency against the stationary phase and biofilm cells of C. albicans, complete eradication corresponding to 7-log killing is achieved when the antifungal drug is provided subsequently to the electrochemical treatment. Further mechanistic analyses have revealed that the sequential treatment shows a complex multimodal action, including the disruption of cell wall integrity and permeability, impaired metabolic functions, and enhanced susceptibility to fluconazole, while altering the biofilm structure. Altogether, we have developed and optimized a new therapeutic strategy to sensitize and facilitate the eradication of fluconazole-tolerant microbes from implantable materials. This work is expected to help advance the use of electrochemical approaches in the treatment of infections caused by C. albicans in both nosocomial and clinical cases.
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Affiliation(s)
| | | | | | | | - Dongyeop Kim
- Biofilm Research Laboratory, Department of Orthodontics and Divisions of Pediatric Dentistry & Community Oral Health, School of Dental Medicine , University of Pennsylvania , Philadelphia , Pennsylvania 19104 , United States
| | - Hyun Koo
- Biofilm Research Laboratory, Department of Orthodontics and Divisions of Pediatric Dentistry & Community Oral Health, School of Dental Medicine , University of Pennsylvania , Philadelphia , Pennsylvania 19104 , United States
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Melo MNDO, Oliveira AP, Wiecikowski AF, Carvalho RS, Castro JDL, de Oliveira FAG, Pereira HMG, da Veiga VF, Capella MMA, Rocha L, Holandino C. Phenolic compounds from Viscum album tinctures enhanced antitumor activity in melanoma murine cancer cells. Saudi Pharm J 2018; 26:311-322. [PMID: 29556122 PMCID: PMC5856955 DOI: 10.1016/j.jsps.2018.01.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 01/29/2018] [Indexed: 12/26/2022] Open
Abstract
Cancer is one of the biggest problems in public health worldwide. Plants have been shown important role in anticancer research. Viscum album L. (Santalaceae), commonly known as mistletoe, is a semi-parasitic plant that grows on different host trees. In complementary medicine, extracts from European mistletoe (Viscum album L.) have been used in the treatment of cancer. The study was conducted to identify chemical composition and antitumor potential of Viscum album tinctures. Chemical analysis performed by high resolution chromatography equipped with high resolution mass spectrometer identified caffeic acid, chlorogenic acid, sakuranetin, isosakuranetin, syringenin 4-O-glucoside, syringenin 4-O-apiosyl-glucoside, alangilignoside C and ligalbumoside A compounds. Some of these compounds are probably responsible for the reduction of tumoral cellular growth in a dose-dependent manner. It was observed that melanoma murine cells (B16F10) were more sensitive to V. album tinctures than human leukaemic cells (K562), besides non-tumoral cells (MA-104) had a much lower cytotoxicity to them. Apoptotic-like cells were observed under light microscopy and were confirmed by a typical DNA fragmentation pattern. Additionally, flow cytometry results using Annexin-V/FITC permitted to quantify increased expression of early and late apoptotic markers on tumoral cells, confirming augmented Sub G0 population, which was probably associated with a consistent decrease in G1, and an increase in S or G2/M populations. Results indicate the chemical composition of V. album tinctures influences the mechanisms of in vitro tumoral cell death, suggesting a potential use in cancer pharmacotherapy research.
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Key Words
- % v/v, % volume/volume
- Antitumoral
- DMEM, Dulbecco’s Modified Eagle Medium
- HPLC, high performance liquid chromatography
- HRMS, high resolution mass
- Lignans
- Mistletoe
- NP/PEG, Diphenylboriloxyethilamine/polyetileneglicol
- PDA, photodiode array detector
- Phenolic compounds
- TA, tincture A
- TB, tincture B
- TLC, Thin Layer Chromatography
- UFLC, ultra fast liquid chromatography
- UHPLC, ultra high performance liquid chromatography
- Viscum album
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Affiliation(s)
- Michelle Nonato de Oliveira Melo
- Multidisciplinary Laboratory of Pharmaceutical Sciences, Faculty of Pharmacy, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
- Vegetal Biotechnology Program, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Adriana Passos Oliveira
- Multidisciplinary Laboratory of Pharmaceutical Sciences, Faculty of Pharmacy, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
- Corresponding author at: Multidisciplinary Laboratory of Pharmaceutical Sciences, Faculty of Pharmacy, Federal University of Rio de Janeiro, Centro de Ciências da Saúde, Bloco B subsolo, sala 11, Avenida Carlos Chagas Filho 373, Ilha do Fundão/Cidade Universitária, Zip code: 21941-902 Rio de Janeiro, RJ, Brazil.Multidisciplinary Laboratory of Pharmaceutical SciencesFaculty of PharmacyFederal University of Rio de JaneiroCentro de Ciências da SaúdeBloco B subsolo, sala 11, Avenida Carlos Chagas Filho 373, Ilha do Fundão/Cidade UniversitáriaZip code: 21941-902 Rio de JaneiroRJBrazil
| | - Adalgisa Felippe Wiecikowski
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Renato Sampaio Carvalho
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Juliana de Lima Castro
- Brazilian Doping Control Laboratory, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | | | | | - Venicio Feo da Veiga
- Microscopy Sector Professor Paulo de Góes, Microbiology Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marcia Marques Alves Capella
- Multidisciplinary Laboratory of Pharmaceutical Sciences, Faculty of Pharmacy, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
- Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Leandro Rocha
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Fluminense Federal University, Niterói, RJ, Brazil
| | - Carla Holandino
- Multidisciplinary Laboratory of Pharmaceutical Sciences, Faculty of Pharmacy, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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