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1.
Semin Cancer Biol ; 69: 52-68, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-32014609

RESUMO

Nanotechnology is reshaping health care strategies and is expected to exert a tremendous impact in the coming years offering better healthcare facilities. It has led to not only therapeutic drug delivery feasibility but also to diagnostics. Materials in the size of nano range (1-100 nm) used in the design, fabrication, regulation, and application of therapeutic drugs or devices are classified as medical nanotechnology and nanopharmacology. Delivery of more complex molecules to the specific site of action as well as gene therapy has pushed forward the nanoparticle-based drug delivery to its maximum. Areas that benefit from nano-based drug delivery systems are cancer, diabetes, infectious diseases, neurodegenerative diseases, blood disorders and orthopedic-related ailments. Moreover, development of nanotherapeutics with multi-functionalities has a considerable potential to fill the gaps that exist in the present therapeutic domain. In cancer treatment, nanomedicines have superiority over current therapeutic practices as they can effectively deliver the drug to the affected tissues, thus reducing drug toxicities. Along this line, polymeric conjugates of asparaginase and polymeric micelles of paclitaxel have recently been recommended for the treatment of various types of cancers. Nanotechnology-based therapeutics and diagnostics provide greater effectiveness with less or no toxicity concerns. Similarly, diagnostic imaging holds promising future applications with newer nano-level imaging elements. Advancements in nanotechnology have emerged to a newer direction which use nanorobotics for various applications in healthcare. Accordingly, this review comprehensively highlights the potentialities of various nanocarriers and nanomedicines for multifaceted applications in diagnostics and drug delivery, especially the potentialities of polymeric nanoparticle, nanoemulsion, solid-lipid nanoparticle, nanostructured lipid carrier, self-micellizing anticancer lipids, dendrimer, nanocapsule and nanosponge-based therapeutic approaches in the field of cancer. Furthermore, this article summarizes the most recent literature pertaining to the use of nano-technology in the field of medicine, particularly in treating cancer patients.


Assuntos
Antineoplásicos/administração & dosagem , Sistemas de Liberação de Medicamentos , Nanomedicina , Nanopartículas/administração & dosagem , Neoplasias/diagnóstico , Neoplasias/tratamento farmacológico , Animais , Humanos , Nanopartículas/química
2.
AAPS PharmSciTech ; 23(1): 62, 2022 Jan 26.
Artigo em Inglês | MEDLINE | ID: mdl-35080685

RESUMO

Flutamide which is used to treat prostate cancer and other diseases induces liver damage during and after the therapy. The aim of this study was to develop a flutamide/piperineco-loaded self-emulsifying drug delivery system (FPSEDDS) to inhibit flutamide-induced liver injury by utilizing piperine as a metabolic inhibitor. The development of SEDDS was carried out following a quality by design (QbD) approach. The risk assessment study was performed to identify critical quality attributes (CQAs) and critical material attributes (CMAs)/critical process parameters (CPPs). I-optimal mixture design was executed with three CMAs as the independent variables and CQAs as the dependable variables. The effectiveness of optimized SEDDS to circumvent flutamide-induced hepatotoxicity was assessed in mice. The numerical optimization suggested an optimal formulation with a desirability value of 0.621, using CQAs targets as optimization goals with 95% prediction intervals (α = 0.05). The optimal formulation exhibited the grade A SEDDS characteristics with the guarantee of high payloads in self-formed oily droplets. The design space was also obtained from the same optimization goals. All CQA responses of verification points were found within the 95% prediction intervals of the polynomial models, indicating a good agreement between actual versus predicted responses within the design space. These obtained responses also passed CQAs acceptance criteria. Finally, hematoxylin-eosin staining revealed the minimal flutamide-induced hepatotoxicity from the optimal SEDDS formulation as compared to the control and flutamide/piperine normal suspension. We demonstrate that the piperine containing optimized SEDDS formulation developed by QbD significantly reduces the flutamide-induced liver injury in mice.


Assuntos
Sistemas de Liberação de Medicamentos , Flutamida , Animais , Emulsões , Flutamida/toxicidade , Fígado , Masculino , Camundongos
3.
Biomacromolecules ; 16(11): 3519-29, 2015 Nov 09.
Artigo em Inglês | MEDLINE | ID: mdl-26451914

RESUMO

Despite the tremendous progress that photothermal therapy (PTT) has recently achieved, it still has a long way to go to gain the effective targeted photothermal ablation of tumor cells. Driven by this need, we describe a new class of targeted photothermal therapeutic agents for cancer cells with pH responsive bioimaging using near-infrared dye (NIR) IR825, conjugated poly(ethylene glycol)-g-poly(dimethylaminoethyl methacrylate) (PEG-g-PDMA, PgP), and hyaluronic acid (HA) anchored reduced graphene oxide (rGO) hybrid nanoparticles. The obtained rGO nanoparticles (PgP/HA-rGO) showed pH-dependent fluorescence emission and excellent near-infrared (NIR) irradiation of cancer cells targeted in vitro to provide cytotoxicity. Using intravenously administered PTT agents, the time-dependent in vivo tumor target accumulation was exactly defined, presenting eminent photothermal conversion at 4 and 8 h post-injection, which was demonstrated from the ex vivo biodistribution of tumors. These tumor environment responsive hybrid nanoparticles generated photothermal heat, which caused dominant suppression of tumor growth. The histopathological studies obtained by H&E staining demonstrated complete healing from malignant tumor. In an area of limited successes in cancer therapy, our translation will pave the road to design stimulus environment responsive targeted PTT agents for the safe eradication of devastating cancer.


Assuntos
Grafite/química , Nanopartículas/química , Neoplasias/terapia , Fototerapia/métodos , Animais , Materiais Biocompatíveis/química , Materiais Biocompatíveis/farmacologia , Linhagem Celular Tumoral , Cães , Grafite/farmacocinética , Humanos , Ácido Hialurônico/química , Ácido Hialurônico/farmacocinética , Concentração de Íons de Hidrogênio , Células Madin Darby de Rim Canino , Metacrilatos/química , Metacrilatos/farmacocinética , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Nus , Nanocompostos/química , Polietilenoglicóis/química , Polietilenoglicóis/farmacocinética , Espectroscopia de Luz Próxima ao Infravermelho , Distribuição Tecidual
4.
ACS Appl Bio Mater ; 7(5): 3190-3201, 2024 05 20.
Artigo em Inglês | MEDLINE | ID: mdl-38709861

RESUMO

We report an near-infrared (NIR)-trackable and therapeutic liposome with skin tumor specificity. Liposomes with a hydrodynamic diameter of ∼20 nm are tracked under the vein visualization imaging system in the presence of loaded paclitaxel and NIR-active agents. The ability to track liposome nanocarriers is recorded on the tissue-mimicking phantom model and in vivo mouse veins after intravenous administration. The trackable liposome delivery provides in vitro and in vivo photothermal heat (∼40 °C) for NIR-light-triggered area-specific chemotherapeutic release. This approach can be linked with a real-time vein-imaging system to track and apply area-specific local heat, which hitchhikes liposomes from the vein and finally releases them at the tumor site. We conducted studies on mice skin tumors that indicated the disappearance of tumors visibly and histologically (H&E stains). The ability of nanocarriers to monitor after administration is crucial for improving the effectiveness and specificity of cancer therapy, which could be achieved in the trackable delivery system.


Assuntos
Raios Infravermelhos , Lipossomos , Paclitaxel , Medicina de Precisão , Neoplasias Cutâneas , Lipossomos/química , Animais , Camundongos , Neoplasias Cutâneas/patologia , Neoplasias Cutâneas/tratamento farmacológico , Neoplasias Cutâneas/terapia , Paclitaxel/química , Paclitaxel/administração & dosagem , Paclitaxel/farmacologia , Teste de Materiais , Materiais Biocompatíveis/química , Tamanho da Partícula , Humanos , Sistemas de Liberação de Medicamentos , Ensaios de Seleção de Medicamentos Antitumorais
5.
Sci Rep ; 13(1): 9909, 2023 06 19.
Artigo em Inglês | MEDLINE | ID: mdl-37336915

RESUMO

Liver disease is a serious health problem affecting people worldwide at an alarming rate. The present study aimed to investigate the protective effects of Ganoderma lucidum against CCl4-induced liver toxicity in rats. The experimental Long Evans rats were divided into five groups, of which four groups were treated with carbon tetrachloride (CCl4). Among the CCl4 treated groups, one of the groups was treated with silymarin and two of them with ethanolic extract of G. lucidum at 100 and 200 mg/Kg body weight. The oxidative stress parameters and endogenous antioxidant enzyme concentrations were assessed by biochemical tests. Liver enzymes ALT, AST, and ALP were determined spectrophotometrically. Histopathological examinations were carried out to assess hepatic tissue damage and fibrosis. Reverse transcription PCR (RT-PCR) was performed to determine the expression of IL-1ß, IL-6, IL-10, TNF-α, and TGF-ß genes. Gas Chromatography-Mass Spectroscopy (GC-MS) analysis revealed that G. lucidum is rich in several phytochemicals including 6-Octadecanoic acid (55.81%), l-( +)-Ascorbic acid 2,6-dihexadecanoate (18.72%), Cis-11-Eicosenamide (5.76%), and Octadecanoic acid (5.26%). Treatment with the G. lucidum extract reduced the elevated ALT, AST, ALP levels, and cellular oxidative stress markers and increased the endogenous antioxidant levels. Histopathology observations revealed that the inflammation, infiltration of immune cells, and aberration of collagen fibers in the hepatocytes were altered by the G. lucidum treatment. The increased expression of inflammatory cytokines TNF-α, TGF-ß, IL-1 ß, and IL-6 were markedly suppressed by G. lucidum extract treatment. G. lucidum also prevented the suppression of protective IL-10 expression by CCl4. This study strongly suggests that G. lucidum extract possesses significant hepatoprotective activity as evidenced by reduced oxidative stress and inflammation mediated by suppression in inflammatory cytokine expression and increased protective IL-10 cytokine expression.


Assuntos
Doença Hepática Induzida por Substâncias e Drogas , Reishi , Ratos , Animais , Antioxidantes/metabolismo , Fígado/metabolismo , Ratos Long-Evans , Reishi/metabolismo , Interleucina-10/metabolismo , Fator de Necrose Tumoral alfa/metabolismo , Interleucina-6/metabolismo , Doença Hepática Induzida por Substâncias e Drogas/patologia , Estresse Oxidativo , Inflamação/patologia , Extratos Vegetais/farmacologia , Citocinas/metabolismo , Fator de Crescimento Transformador beta/metabolismo , Tetracloreto de Carbono/toxicidade
6.
Int J Biol Macromol ; 241: 124701, 2023 Jun 30.
Artigo em Inglês | MEDLINE | ID: mdl-37137352

RESUMO

We describe the synthesis of a nanostructured dermal patch composed of chitosan-tannic acid (CT) that can carry near-infrared (NIR) active Indocyanine green (ICG) dye for performing photothermal heat conversion activity. The NIR-responsive CT-I dermal patch can deliver topical antibiotic drugs (Neomycin). The CT-I and drug-loaded CT-I/N patches have been demonstrated by FTIR, SEM/EDX, TGA, and DSC analysis. The in vitro drug release from the CT-I/N patch are favorable in the dermal environment (pH = 5.5) and significantly increases 25 % more at higher temperatures of 40 to 45 °C. The CT-I/N showed increasing photothermal heat in response to NIR (808 nm) light. The in vivo thermograph demonstrated that the CT-I/N patch can generate >45 °C within 5 min NIR irradiation. As a result, sustained wound healing was shown in H&E (hematoxylin and eosin) staining dermal tissue. Such NIR-active nanostructure film/patch is promising for the future of any sustained on-demand drug delivery system.


Assuntos
Quitosana , Nanoestruturas , Doxorrubicina/química , Sistemas de Liberação de Medicamentos , Temperatura Alta , Liberação Controlada de Fármacos
7.
Polymers (Basel) ; 14(15)2022 Aug 08.
Artigo em Inglês | MEDLINE | ID: mdl-35956734

RESUMO

Objectives: Despite having profound therapeutic value, the clinical application of resveratrol is restrained due to its <1% bioavailability, arising from the extensive fast-pass effect along with enterohepatic recirculation. This study aimed to develop a self-emulsifying formulation capable of increasing the bioavailability of resveratrol via lymphatic transport. Methods: The resveratrol−phospholipid complex (RPC) was formed by the solvent evaporation method and characterized by FTIR, DSC, and XRD analyses. The RPC-loaded self-emulsifying drug delivery system (SEDDS) was designed, developed, and optimized using the QbD approach with an emphasis on resveratrol transport through the intestinal lymphatic pathway. The in vivo pharmacokinetic study was investigated in male Wister Albino rats. Results: The FTIR, DSC, and XRD analyses confirmed the RPC formation. The obtained design space provided robustness of prediction within the 95% prediction interval to meet the CQA specifications. An optimal formulation (desirability value of 7.24) provided Grade-A self-emulsion and exhibited a 48-fold bioavailability enhancement compared to the pure resveratrol. The cycloheximide-induced chylomicron flow blocking approach demonstrated that 91.14% of the systemically available resveratrol was transported through the intestinal lymphatic route. Conclusions: This study suggests that an optimal self-emulsifying formulation can significantly increase the bioavailability of resveratrol through lymphatic transport to achieve the desired pharmacological effects.

8.
Curr Drug Discov Technol ; 18(3): 354-364, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-32164511

RESUMO

Most of the clinical approved protein-based drugs or under clinical trials have a profound impact on the treatment of critical diseases. The mammalian eukaryotic cells culture approaches, particularly the CHO (Chinese Hamster Ovary) cells are mainly used in the biopharmaceutical industry for the mass-production of the therapeutic protein. Recent advances in CHO cell bioprocessing to yield recombinant proteins and monoclonal antibodies have enabled the expression of quality protein. The developments of cell lines are possible to enhance specific productivity. As a result, it holds an interesting area for academic as well as industrial researchers around the world. This review will focus on the recent progress of the mammalian CHO cells culture technology and the future scope of further development for the mass-production of protein therapeutics.


Assuntos
Anticorpos Monoclonais/isolamento & purificação , Técnicas de Cultura de Células/métodos , Proteínas Recombinantes/isolamento & purificação , Tecnologia Farmacêutica/métodos , Animais , Anticorpos Monoclonais/uso terapêutico , Reatores Biológicos , Células CHO , Técnicas de Cultura de Células/instrumentação , Cricetulus , Humanos , Proteínas Recombinantes/uso terapêutico , Tecnologia Farmacêutica/instrumentação
9.
Biomed Pharmacother ; 141: 111908, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34328087

RESUMO

The present investigation was an attempt to evaluate the hypoglycemic, lipid-lowering, antioxidant and hepatoprotective effects of cumin (Cuminum cyminum family: Apiaceae) supplementation in high fat (HF) diet fed rats. Male Wistar rats were divided into four groups, such as control, control+ cumin, HF and HF+ cumin. Oral glucose tolerance test, plasma lipids, oxidative stress parameters, antioxidant enzymes activities, and liver dysfunction marker enzyme activities were evaluated. Additionally, histological staining of liver tissue was performed to evaluate the inflammatory cells infiltration, iron deposition and fibrosis. The current investigation demonstrated that 1% (w/w) supplementation of cumin powder significantly reduced HF diet-induced glucose intolerance, epididymal and mesenteric fat wet weights and lipid parameters like triglycerides, total cholesterol and low-density lipoproteins. Oxidative stress-related biomarkers including thiobarbituric acid reactive substances (TBARS), nitric oxide (NO) and advanced oxidation protein product (APOP) were also reduced by cumin supplementation. Moreover, HF-diet increased the activity of hepatic biomarker enzymes such as alanine transaminase (ALT) and alkaline phosphatase (ALP) activities which were significantly reduced by cumin powder supplementation. On the other hand, cumin powder supplementation was able to restore the reduced glutathione level with parallel augmentation of the antioxidant enzymes activities such as superoxide dismutase (SOD) and catalase in liver of HF diet-fed rats. Additionally, histological assessments confirmed that cumin powder supplementation also normalized the fat droplet deposition and inflammatory cells infiltration in the liver of HF diet-fed rats. This study suggests that cumin powder supplementation ameliorates dyslipidemia, oxidative stress and hepatic damage in HF diet-fed rats.


Assuntos
Cuminum , Hiperlipidemias/prevenção & controle , Hepatopatia Gordurosa não Alcoólica/prevenção & controle , Estresse Oxidativo/efeitos dos fármacos , Tecido Adiposo/efeitos dos fármacos , Tecido Adiposo/metabolismo , Animais , Antioxidantes/farmacologia , Colesterol/sangue , Dieta Hiperlipídica , Suplementos Nutricionais , Lipoproteínas LDL/sangue , Fígado/enzimologia , Testes de Função Hepática , Masculino , Pós , Ratos , Ratos Wistar , Sementes/química , Triglicerídeos/sangue
10.
Micromachines (Basel) ; 12(8)2021 Aug 18.
Artigo em Inglês | MEDLINE | ID: mdl-34442597

RESUMO

The development of externally controlled drug delivery systems that can rapidly trigger drug release is widely expected to change the landscape of future drug carriers. In this study, a drug delivery system was developed for on-demand therapeutic effects. The thermoresponsive paraffin film can be loaded on the basis of therapeutic need, including local anesthetic (lidocaine) or topical antibiotic (neomycin), controlled remotely by a portable mini-heater. The application of mild temperature (45 °C) to the drug-loaded paraffin film allowed a rapid stimulus response within a short time (5 min). This system exploits regular drug release and the rapid generation of mild heat to trigger a burst release of 80% within 6 h of any locally administered drug. The in vitro drug release studies and in vivo therapeutic activity were observed for local anesthesia and wound healing using a neomycin-loaded film. The studies demonstrated on-demand drug release with minimized inflammation and microbial infection. This temperature-responsive drug-loaded film can be triggered remotely to provide flexible control of dose magnitude and timing. Our preclinical studies on these remotely adjustable drug delivery systems can significantly improve patient compliance and medical practice.

11.
J Inflamm Res ; 14: 443-459, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33642871

RESUMO

INTRODUCTION: Hypoglycemia in diabetes mellitus (DM) correlates with hepatic impairment, nephropathy, lipid abnormalities, and oxidative stress and subsequently complicates the disease pathogenesis. Medicinal plants have been used for the management of diabetes since ancient times. In this study, we explored the potentials of Colocasia affinis (CA), a plant known to possess anti-allergic and anti-inflammatory activities, as a remedy for diabetes and related complications. METHODS: We induced diabetes in rats using a single intraperitoneal dose (65 mg/kg) of streptozotocin (STZ). We next treated the rats with an ethanolic extract of leaves of CA to reveal its antidiabetic and organ-protective potentials. Biomarkers of diabetes, inflammation, and oxidative stress were measured using biochemical and histopathological analysis. We also performed molecular docking for three major phytochemicals (kaempferol, myricetin, and rosmarinic acid) of CA. RESULTS: Oral administration of the CA leaves extract at 250 mg/kg and 500 mg/kg doses decreased blood glucose level significantly (p<0.05) in STZ-induced diabetic rats. The extract also considerably attenuated plasma HbA1c levels and normalized blood lipids, glycogen, alanine aminotransferase (ALT), and aspartate aminotransferase (AST). Additionally, treatment with the extract improved kidney complications by decreasing serum creatinine and blood urea nitrogen (BUN) levels. Furthermore, CA leaves extract normalized nitric oxide (NO) and advance oxidative protein products (AOPP) in diabetic rats. The extract also showed significant improvement of the antioxidant enzymes glutathione dismutase (GSH) and superoxide dismutase (SOD) at a dose of 500 mg/kg. Besides, histological investigation demonstrated attenuation of inflammation of the vital organs, including the liver and the kidney. In silico studies revealed that three major phytochemicals (kaempferol, myricetin, and rosmarinic acid) of the ethanolic extract of leaves of CA can inhibit several molecular targets of diabetes and inflammation. CONCLUSION: Collectively, our results demonstrated the therapeutic potentials of CA for the mitigation of diabetes and diabetic complications.

12.
Biomed Phys Eng Express ; 6(1): 015028, 2020 01 20.
Artigo em Inglês | MEDLINE | ID: mdl-33438616

RESUMO

The application of surgical suture-thread and the systemic analgesics regimens for pain control in the postoperative surgery remain the criterion standard. However, these medications have daunting adverse effects on the body's innate pain management system. To address this issue, we have developed a local analgesic-loaded suture system which could be efficiently used for surgical repair with localized sedation effect. The drug-loaded conventional suture has modified by adhesive poly-dopamine coating with the local anesthetic lidocaine. The surface modifications have been ascertained by FE-SEM imaging. The tensile strength of suture ensures required elasticity to use in surgical skin closure. In vitro drug release and the in vivo local analgesia was achieved one day after surgery and persisted approximately for one week in 80% of treated animals. Our pre-clinical results suggest that drug-loaded surgical thread may be an effective strategy for improving the overall outcome.


Assuntos
Sistemas de Liberação de Medicamentos , Liberação Controlada de Fármacos , Indóis/administração & dosagem , Lidocaína/administração & dosagem , Manejo da Dor/métodos , Dor Pós-Operatória/tratamento farmacológico , Polímeros/administração & dosagem , Suturas/estatística & dados numéricos , Analgesia/métodos , Anestésicos Locais/administração & dosagem , Animais , Masculino , Ratos , Ratos Sprague-Dawley , Resistência à Tração
13.
Saudi Pharm J ; 17(3): 249-53, 2009 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-23964168

RESUMO

To characterize the binding site of propranolol hydrochloride, the free concentration of warfarin (site-I-specific probe) bound to BSA was measured upon the addition of propranolol hydrochloride. It was found that the free concentration of warfarin sodium was increased from 100% (as % of initial) to 552.35% when the ratio of propranolol to BSA was increased 1-6. In contrast, under the same experimental conditions, when diazepam was used as a site-II-specific probe, the increment of the free concentration of diazepam by propranolol was from 100% (as % of initial) to 415.42. From these data it is evident that the increment of free concentration of warfarin sodium is obviously greater than that of diazepam by propranolol. So it can be concluded that propranolol preferentially binds to site-I. Again as the displacement of diazepam is quite enough it can also be suggested that propranolol in addition to site-I also binds to site-II on the BSA molecule but to a lower extent. Again in the reverse experiment, the free concentration of propranolol was increased from 100% (as % of initial) to 476% when warfarin to BSA ratio was 1-6 as shown, on the other hand, the free concentration of propranolol was increased from 100% (as % initial) to 222.39% when the ratio of diazepam to BSA was also 1-6. From the data it is clear that the increment of propranolol due to displacement by warfarin (site-I probe) is higher than that of propranolol when displaced by diazepam (site-II probe). Thus this reverse experiment also agrees with the previous experiment.

14.
Int J Nanomedicine ; 14: 9983-9993, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31908454

RESUMO

Advances in low-dimensions nanomaterials drug-carrier have rapidly translated into clinical practice. Interestingly, the two-dimensional (2D) nanomaterials of hexagonal boron nitride (h-BN), so-called "white graphite" are relatively less explored compared to the post popular 2D graphene oxide (GO). However, the unique properties of h-BN nanomaterials make them well suited for the delivery of chemotherapeutic in cancer treatment. Recent studies have shown that the h-BN is a potential candidate in biomedical sciences, both as nanocarriers and nano-transducers. In this review, we discuss the various physicochemical properties and important concepts involved in h-BN nanosheets as anticancer drug carriers.


Assuntos
Antineoplásicos/administração & dosagem , Compostos de Boro/química , Sistemas de Liberação de Medicamentos/métodos , Nanoestruturas/administração & dosagem , Nanoestruturas/química , Portadores de Fármacos/administração & dosagem , Portadores de Fármacos/química , Humanos , Neoplasias/tratamento farmacológico
15.
Mater Sci Eng C Mater Biol Appl ; 93: 1104-1115, 2018 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-30274041

RESUMO

Bio-inspired materials with the multiscale skeleton show intrinsic multifunctional integration. This special biological characteristic is designed and developed to encourage scientists and engineers to multiobjective artificial physicals with multiscale frameworks. This review focuses on some recent development in the areas of classical biomaterials including lotus leaves, butterfly wings, red rose petals, spider silks and the associated multiscale frameworks acquiring function coalescence. We have also addressed some queries and standpoints for bio-inspired form of drug delivery using pathogens, which sheds light on delivery of proteins, small interfering RNA and other therapeutic agents.


Assuntos
Materiais Biomiméticos , Sistemas de Liberação de Medicamentos/métodos , Nanoestruturas , Animais , Materiais Biomiméticos/química , Materiais Biomiméticos/uso terapêutico , Humanos , Nanoestruturas/química , Nanoestruturas/uso terapêutico
16.
Int J Pharm ; 534(1-2): 206-212, 2017 Dec 20.
Artigo em Inglês | MEDLINE | ID: mdl-29031982

RESUMO

The development of combined anticancer therapeutic techniques has drawn increased attention for enhanced therapeutic efficacy. In this work, we synthesized Near Infrared (NIR) responsive ICG (I) functionalized hexagonal boron-nitride (hBN) as photothermal therapeutic agent (hBNI) and Doxorubicin (Dox)-conjugated Hyaluronic acid (HA) as tumor targeted chemotherapeutic agent (d-HA-Dox). Using adhesion properties of Dopamine (d), the hBNI has been integrated with d-HA-Dox to make a tumor targeted photothermal chemotherapeutic agent (hBNI/d-HA-Dox). The nanostructure of hBNI/d-HA-Dox has been studied using 1H NMR, FTIR, UV-vis-NIR and AFM images. Our in vitro results have provided evidence that hBNI/d-HA-Dox can efficiently damage targeted cancer cells while healthy cells are less affected suggesting that the targeted hBNI/d-HA-Dox nanoparticles work as a complementary antitumor agent with its synergistic co-therapeutic power.


Assuntos
Antineoplásicos/química , Antineoplásicos/farmacologia , Compostos de Boro/química , Neoplasias/tratamento farmacológico , Linhagem Celular Tumoral , Doxorrubicina/química , Doxorrubicina/farmacologia , Humanos , Ácido Hialurônico/química , Nanopartículas/química , Nanoestruturas/química , Fototerapia/métodos
17.
Carbohydr Polym ; 147: 436-443, 2016 08 20.
Artigo em Inglês | MEDLINE | ID: mdl-27178950

RESUMO

This paper reports the development of a pH-responsive molecular pattern that shows specific and selective affinity for particular host-guest interactions, and its use as a pH fluorescent sensor. The pH-responsive boronate ester is formed via interactions between the diol group of ß-cyclodextrin (CD) and phenylboronic acid of poly(ethylene glycol), and is strategically designed to allow reversible formation of a molecular lining pattern. Printing on a versatile substrate provides a method to monitor the positioning of different molecules by using a pH-responsive boronate ester, allowing specific host-guest interactions on any surface. Confocal laser scanning microscopy, fluorescence spectroscopy, and (1)H NMR results indicate that the assembled CD monolayer can be removed by washing with an acidic pH buffer, demonstrating the presence of a boronate ester connective bridge, which is acid labile. Therefore, visualization of the pH-responsive fluorescence sensor using a rhodamine-CD complex allows straightforward discrimination between different molecules on any substrate, thus facilitating application of this sensor in clinical diagnostics and environmental monitoring.


Assuntos
Técnicas de Química Analítica/métodos , Monitoramento Ambiental/métodos , Polietilenoglicóis/química , beta-Ciclodextrinas/química , Técnicas de Química Analítica/instrumentação , Ésteres/química , Fluorescência , Concentração de Íons de Hidrogênio
18.
ACS Appl Mater Interfaces ; 8(43): 29827-29834, 2016 Nov 02.
Artigo em Inglês | MEDLINE | ID: mdl-27750014

RESUMO

In this study, a new hydrophilic-hydrophobic transition surface was designed via visible-light-induced photocatalytic perfluorinated silica-based fluorescent carbon nanoparticles (FNPs)/TiO2. Perfluorinated silica-polydopamine hybrid FNPs (f-FNPs) were easily fabricated by carbonization in an emulsion system consisting of tetraethyl orthosilicate and dopamine, followed by the deposition of TiO2 on f-FNPs, which demonstrated the reversal from hydrophobic to hydrophilic nature during successful photocatalysis. The synergistic effect of silica-carbon and the deposited TiO2 NPs led to the decomposition of methylene blue under UV and visible light irradiation, demonstrating that FNPs/TiO2 sustains photocatalytic activity. The profound contact angle with the catalytic kinetics curve and precise morphology and extension of cells detach antifouling exceptionally unrestricted the synergistic effect of silica-carbon on TiO2 NPs on a coated paper substrate. Given the interest in the manipulation of hydrophobicity and hydrophilicity, this study can serve as a guideline for the fabrication of photocatalytic surfaces where water spreads completely.

19.
ACS Appl Mater Interfaces ; 7(18): 9469-78, 2015 May 13.
Artigo em Inglês | MEDLINE | ID: mdl-25905634

RESUMO

Growing microbial resistance that renders antibiotic treatment vulnerable has emerged, attracting a great deal of interest in the need to develop alternative antimicrobial treatments. To contribute to this effort, we report magnetic iron oxide (Fe3O4) nanoparticles (NPs) coated with catechol-conjugated poly(vinylpyrrolidone) sulfobetaines (C-PVPS). This negatively charged Fe3O4@C-PVPS is subsequently encapsulated by poly(3,4-ethylenedioxythiophene) (PEDOT) following a layer-by-layer (LBL) self-assembly method. The obtained Fe3O4@C-PVPS:PEDOT nanoparticles appear to be novel NIR-irradiated photothermal agents that can achieve effective bacterial killing and are reusable after isolation of the used particles using external magnetic fields. The recyclable Fe3O4@C-PVPS:PEDOT NPs exhibit a high efficiency in converting photothermal heat for rapid antibacterial effects against Staphylococcus aureus and Escherichia coli. In this study, antibacterial tests for repeated uses maintained almost 100% antibacterial efficiency during three cycles and provided rapid and effective killing of 99% Gram-positive and -negative bacteria within 5 min of near-infrared (NIR) light exposure. The core-shell nanoparticles (Fe3O4@C-PVPS:PEDOT) exhibit the required stability, and their paramagnetic nature means that they rapidly convert photothermal heat sufficient for use as NIR-irradiated antibacterial photothermal sterilizing agents.


Assuntos
Antibacterianos/farmacologia , Betaína/análogos & derivados , Compostos Bicíclicos Heterocíclicos com Pontes/química , Compostos Férricos/química , Nanopartículas/química , Polímeros/química , Povidona/farmacologia , Reciclagem , Betaína/farmacologia , Compostos Bicíclicos Heterocíclicos com Pontes/síntese química , Escherichia coli/efeitos dos fármacos , Raios Infravermelhos , Testes de Sensibilidade Microbiana , Viabilidade Microbiana/efeitos dos fármacos , Nanopartículas/ultraestrutura , Processos Fotoquímicos , Espectroscopia Fotoeletrônica , Polímeros/síntese química , Espectrofotometria Ultravioleta , Staphylococcus aureus/efeitos dos fármacos , Temperatura , Fatores de Tempo
20.
J Mater Chem B ; 3(28): 5833-5841, 2015 Jul 28.
Artigo em Inglês | MEDLINE | ID: mdl-32262580

RESUMO

The development of cooperative drug delivery systems that can detect and target the disease site, with rapid trigger controlled drug release (internally and externally), is widely expected to change the landscape of future drug carriers. In this study a drug delivery system was developed for the cancer-targeted release of chemotherapeutic agents inside living cells. This system is an environment sensitive (pH), and external photothermally remote controlled, cooperative image-guided drug delivery matrix. Partially carbonized fluorescence hyaluronic acid (HA-FCN) was conjugated with boronic acid (BA) to promote the formation of boronate ester with diol groups of ß-cyclodextrin (CD) [HA-FCN-CD]. The pH influence mediated release of paclitaxel (PTX) from the CD cavity of HA-FCN-CD was utilized for targeted cancer bioimaging. This active-target delivery system (HA-FCN-CD-PTX) was found to show optical absorption properties similar to those of the near infrared (NIR) light sensitive carbonized material. This system exploits acidity for triggered drug release and rapid generation of mild photothermal heat to trigger burst release of PTX. Cooperative guided bioimaging that employs both internal pH responsive and external NIR controlled drug carriers is a promising method for chemotherapeutic release that can be adjusted according to physiological needs.

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