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1.
Curr Pharm Des ; 2024 Jun 10.
Artigo em Inglês | MEDLINE | ID: mdl-38859792

RESUMO

Organ-on-chip is an innovative technique that emerged from tissue engineering and microfluidic technologies. Organ-on-chip devices (OoCs) are anticipated to provide efficient resolutions to dealing with challenges in pharmaceutical advancement and individualized illness therapies. Organ-on-chip is an advanced method that can replicate human organs' physiological conditions and functions on a small chip. It possesses the capacity to greatly transform the drug development process by enabling the simulation of diseases and the testing of drugs. Effective integration of this advanced technical platform with common pharmaceutical and medical contexts is still a challenge. Microfluidic technology, a micro-level technique, has become a potent tool for biomedical engineering research. As a result, it has revolutionized disciplines including physiological material interpreting, compound detection, cell-based assay, tissue engineering, biological diagnostics, and pharmaceutical identification. This article aims to offer an overview of newly developed organ-on-a-chip systems. It includes single-organ platforms, emphasizing the most researched organs, including the heart, liver, blood arteries, and lungs. Subsequently, it provides a concise overview of tumour-on-a-chip systems and emphasizes their use in the evaluation of anti-cancer medications.

2.
Ther Deliv ; : 1-8, 2024 Jun 11.
Artigo em Inglês | MEDLINE | ID: mdl-38888757

RESUMO

Ophthalmic diseases can result in permanent vision loss and blindness. Convenient topical and systemic treatments are preferred to address these sight-threatening conditions. However, the unique anatomy of the eye presents challenges for drug delivery. Various ophthalmic ointment formulations have been developed to enhance bioavailability in the eye to prolong residence time and improve corneal permeability. This article explores a wide range of ocular diseases affecting individuals globally and how ointments are used to manage them. From eye to ocular barriers, this review focuses on published scientific research and formulation strategies for severe ocular complications using conventional topical ointments. Additionally, it delves through patented technologies and marketed formulations supporting the use of ointments in ocular drug delivery.


Eye illnesses can cause blindness. The treatment is tricky due to eye's complex makeup. This paper talks about eye ointments also known as 'creams' or 'pomades' used to deliver medicine to the eye. These creams make the medicine work better by staying in the eye longer and absorbing faster. The present work looks at different eye problems and talks about ointments used to treat both internal and external eye diseases. It also explains how the eye is built and why it is hard for medicine to get in. There is also an information about ointments that have been discovered with some new ideas and those available in the market to cure eye problems.

3.
Artigo em Inglês | MEDLINE | ID: mdl-38834189

RESUMO

This research forms a part of the comprehensive Indian Environmental Radiation Monitoring Network program, focusing on the continuous measurement of absorbed dose rate in outdoor air due to natural gamma radiation (cosmic and terrestrial) in Bengaluru, Karnataka, India. Over the course of a decade (2013-2023), data were collected from 41 monitoring locations in the city using permanently field-installed Geiger-Mueller detector-based environmental radiation monitors. This paper presents an analysis of the extensive long-term monitoring results. The mean absorbed gamma dose rate in outdoor air across the monitoring locations ranged from 84 ± 9 to 156 ± 4 nGy.h-1, with a calculated mean value of 124 ± 15 nGy.h-1. The estimated mean annual effective dose due to outdoor natural gamma radiation varied from 0.10 ± 0.01 to 0.19 ± 0.01 mSv.y-1, with an overall mean of 0.15 ± 0.02 mSv.y-1.

4.
Eur J Pharm Biopharm ; : 114361, 2024 Jun 11.
Artigo em Inglês | MEDLINE | ID: mdl-38871092

RESUMO

Chimeric Antigen Receptor-T cell (CAR-T) therapy has evolved as a revolutionary cancer treatment modality, offering remarkable clinical responses by harnessing the power of a patient's immune system to target and eliminate cancer cells. However, the development and commercialization of CAR-T cell therapies are accompanied by complex regulatory requirements and challenges. This therapy falls under the regulatory category of advanced therapy medicinal products. The regulatory framework and approval tools of regenerative medicine, especially CAR-T cell therapies, vary globally. The present work comprehensively analyses the regulatory landscape and challenges in CAR-T cell therapy development in four key regions: the United States, the European Union, Japan, and India. This work explores the unique requirements and considerations for preclinical studies, clinical trial design, manufacturing standards, safety evaluation, and post-marketing surveillance in each jurisdiction. Due to their complex nature, developers and manufacturers face several challenges. In India, despite advancements in treatment protocols and government-sponsorships, there are still several difficulties regarding access to treatment for the increasing number of cancer patients. However, India's first indigenously developed CAR-T cell therapy, NexCAR19, for B-cell lymphoma or leukemia, approved and available at a low cost compared to other available CAR-T therapies, raises great hope in the battle against cancer. Several strategies are proposed to address the identified hurdles from global and Indian perspectives. It discusses the benefits of aligning regulatory requirements across regions, eventually facilitating international development and enabling access to this transformative therapy.

5.
Int J Nanomedicine ; 19: 5397-5418, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38863647

RESUMO

Background: The healing of burn wounds is a complicated physiological process that involves several stages, including haemostasis, inflammation, proliferation, and remodelling to rebuild the skin and subcutaneous tissue integrity. Recent advancements in nanomaterials, especially nanofibers, have opened a new way for efficient healing of wounds due to burning or other injuries. Methods: This study aims to develop and characterize collagen-decorated, bilayered electrospun nanofibrous mats composed of PVP and PVA loaded with Resveratrol (RSV) and Ampicillin (AMP) to accelerate burn wound healing and tissue repair. Results: Nanofibers with smooth surfaces and web-like structures with diameters ranging from 200 to 400 nm were successfully produced by electrospinning. These fibres exhibited excellent in vitro properties, including the ability to absorb wound exudates and undergo biodegradation over a two-week period. Additionally, these nanofibers demonstrated sustained and controlled release of encapsulated Resveratrol (RSV) and Ampicillin (AMP) through in vitro release studies. The zone of inhibition (ZOI) of PVP-PVA-RSV-AMP nanofibers against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) was found 31±0.09 mm and 12±0.03, respectively, which was significantly higher as compared to positive control. Similarly, the biofilm study confirmed the significant reduction in the formation of biofilms in nanofiber-treated group against both S. aureus and E. coli. X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analysis proved the encapsulation of RSV and AMP successfully into nanofibers and their compatibility. Haemolysis assay (%) showed no significant haemolysis (less than 5%) in nanofiber-treated groups, confirmed their cytocompatibility with red blood cells (RBCs). Cell viability assay and cell adhesion on HaCaT cells showed increased cell proliferation, indicating its biocompatibility as well as non-toxic properties. Results of the in-vivo experiments on a burn wound model demonstrated potential burn wound healing in rats confirmed by H&E-stained images and also improved the collagen synthesis in nanofibers-treated groups evidenced by Masson-trichrome staining. The ELISA assay clearly indicated the efficient downregulation of TNF-alpha and IL-6 inflammatory biomarkers after treatment with nanofibers on day 10. Conclusion: The RSV and AMP-loaded nanofiber mats, developed in this study, expedite burn wound healing through their multifaceted approach.


Assuntos
Ampicilina , Queimaduras , Colágeno , Escherichia coli , Nanofibras , Álcool de Polivinil , Povidona , Resveratrol , Staphylococcus aureus , Cicatrização , Resveratrol/farmacologia , Resveratrol/química , Resveratrol/administração & dosagem , Resveratrol/farmacocinética , Nanofibras/química , Queimaduras/tratamento farmacológico , Cicatrização/efeitos dos fármacos , Animais , Colágeno/química , Povidona/química , Staphylococcus aureus/efeitos dos fármacos , Álcool de Polivinil/química , Humanos , Escherichia coli/efeitos dos fármacos , Ampicilina/farmacologia , Ampicilina/química , Ampicilina/farmacocinética , Ampicilina/administração & dosagem , Antibacterianos/farmacologia , Antibacterianos/química , Antibacterianos/administração & dosagem , Ratos , Biofilmes/efeitos dos fármacos , Masculino
6.
Artigo em Inglês | MEDLINE | ID: mdl-38696091

RESUMO

The current advent explores the potential of itraconazole (ITR) in prostate cancer (PCa), by its incorporation into albumin nanoparticles (NP). ITR as a repurposed moiety has displayed tremendous potential in various cancers. However, poor aqueous solubility poses hurdles towards its clinical translation. Amorphisation of ITR was observed post-incorporation within NP matrix which could prevent its precipitation in aqueous media. ITR NP was developed using quality by design and multivariate analysis and evaluated for cellular uptake, cell proliferation inhibition and the mechanism of PCa cell inhibition. Time and concentration-dependent serum stability and hemolytic potential revealed safety of ITR NP. Morphological changes and nuclear staining studies revealed the efficacy of ITR and ITR NP in promoting growth inhibition of PC-3 cells. Superior qualitative and quantitative uptake, reactive oxygen species (ROS) and mitochondrial impairment for ITR NP in comparison with ITR and control group was observed. Cell cycle study revealed remarkable G2/M phase inhibition in PC-3 cells. ITR NP demonstrated superior anticancer potential in 3D tumoroids mimicking the micro-metastatic lesions compared to control and ITR. Hence, ITR NP can be a favorable alternative therapeutic alternative in PCa.

8.
Mol Pharm ; 21(5): 2118-2147, 2024 May 06.
Artigo em Inglês | MEDLINE | ID: mdl-38660711

RESUMO

The various kinds of nanocarriers (NCs) have been explored for the delivery of therapeutics designed for the management of skin manifestations. The NCs are considered as one of the promising approaches for the skin delivery of therapeutics attributable to sustained release and enhanced skin penetration. Despite the extensive applications of the NCs, the challenges in their delivery via skin barrier (majorly stratum corneum) have persisted. To overcome all the challenges associated with the delivery of NCs, the microneedle (MN) technology has emerged as a beacon of hope. Programmable drug release, being painless, and its minimally invasive nature make it an intriguing strategy to circumvent the multiple challenges associated with the various drug delivery systems. The integration of positive traits of NCs and MNs boosts therapeutic effectiveness by evading stratum corneum, facilitating the delivery of NCs through the skin and enhancing their targeted delivery. This review discusses the barrier function of skin, the importance of MNs, the types of MNs, and the superiority of NC-loaded MNs. We highlighted the applications of NC-integrated MNs for the management of various skin ailments, combinational drug delivery, active targeting, in vivo imaging, and as theranostics. The clinical trials, patent portfolio, and marketed products of drug/NC-integrated MNs are covered. Finally, regulatory hurdles toward benchtop-to-bedside translation, along with promising prospects needed to scale up NC-integrated MN technology, have been deliberated. The current review is anticipated to deliver thoughtful visions to researchers, clinicians, and formulation scientists for the successful development of the MN-technology-based product by carefully optimizing all the formulation variables.


Assuntos
Administração Cutânea , Sistemas de Liberação de Medicamentos , Agulhas , Dermatopatias , Pele , Humanos , Sistemas de Liberação de Medicamentos/métodos , Dermatopatias/tratamento farmacológico , Pele/metabolismo , Pele/efeitos dos fármacos , Nanopartículas/química , Nanopartículas/administração & dosagem , Portadores de Fármacos/química , Animais , Absorção Cutânea , Microinjeções/métodos , Microinjeções/instrumentação
9.
Life Sci ; 343: 122545, 2024 Apr 15.
Artigo em Inglês | MEDLINE | ID: mdl-38458556

RESUMO

Type-1 Diabetes Mellitus (T1DM) manifests due to pancreatic beta cell destruction, causing insulin deficiency and hyperglycaemia. Current therapies are inadequate for brittle diabetics, necessitating pancreatic islet transplants, which however, introduces its own set of challenges such as paucity of donors, rigorous immunosuppression and autoimmune rejection. Organoid technology represents a significant stride in the field of regenerative medicine and bypasses donor-based approaches. Hence this article focuses on strategies enhancing the in vivo engraftment of islet organoids (IOs), namely vascularization, encapsulation, immune evasion, alternative extra-hepatic transplant sites and 3D bioprinting. Hypoxia-induced necrosis and delayed revascularization attenuate organoid viability and functional capacity, alleviated by the integration of diverse cell types e.g., human amniotic epithelial cells (hAECs) and human umbilical vein endothelial cells (HUVECs) to boost vascularization. Encapsulation with biocompatible materials and genetic modifications counters immune damage, while extra-hepatic sites avoid surgical complications and immediate blood-mediated inflammatory reactions (IBMIR). Customizable 3D bioprinting may help augment the viability and functionality of IOs. While the clinical translation of IOs faces hurdles, preliminary results show promise. This article underscores the importance of addressing challenges in IO transplantation to advance their use in treating type 1 diabetes effectively.


Assuntos
Diabetes Mellitus Tipo 1 , Transplante das Ilhotas Pancreáticas , Ilhotas Pancreáticas , Humanos , Transplante das Ilhotas Pancreáticas/métodos , Diabetes Mellitus Tipo 1/cirurgia , Organoides , Células Endoteliais da Veia Umbilical Humana
10.
Artigo em Inglês | MEDLINE | ID: mdl-38509343

RESUMO

Resveratrol is a polyphenolic compound showing anti-inflammatory activity by inhibition of high mobility group box 1 cytokine responsible for the activation of nuclear factor-κB pathway in atopic dermatitis. To evaluate the efficacy of resveratrol through topical route we have developed resveratrol-loaded nanoemulgel for the effective management of atopic dermatitis in mice model. The resveratrol-loaded nanoemulsion (0.5%, 0.75% and 1% w/w) was optimized by spontaneous nano-emulsification. The optimized resveratrol-loaded nanoemulsions showed average globule size in the 180-230 nm range and found to be monodispersed. The resveratrol nanoemulgel was prepared with a SEPINEO™ P 600 gel base and propylene glycol. Ex vivo permeation and retention study resulted in significantly higher skin retention of resveratrol from resveratrol-loaded nanoemulgel than free resveratrol-loaded gel. Preclinical efficacy of resveratrol nanoemulgel displayed promising therapeutic outcomes where, western blotting of skin tissues disclosed a significant reduction in the relative expression of high mobility group box 1, the receptor for advanced glycation end products, toll-like receptor-4 and phosphorylated nuclear factor-κB. Further, real-time polymerase chain reaction also disclosed a significant reduction in pro-inflammatory cytokines such as thymic stromal lymphopoietin, interleukin-4, interleukin-13, interleukin-31, tumor necrosis factor-α and interleukin-6. The histopathological examination of skin sections showed improvement in the skin condition. Collectively, the findings from our study showcased the significant improvement in the atopic dermatitis skin condition in mice model after topical application of resveratrol loaded nanoemulgel.

11.
Curr Drug Targets ; 25(4): 278-300, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38409709

RESUMO

Compared to the conventional approach, nanoparticles (NPs) facilitate a non-hazardous, non-toxic, non-interactive, and biocompatible system, rendering them incredibly promising for improving drug delivery to target cells. When that comes to accomplishing specific therapeutic agents like drugs, peptides, nucleotides, etc., lipidic nanoparticulate systems have emerged as even more robust. They have asserted impressive ability in bypassing physiological and cellular barriers, evading lysosomal capture and the proton sponge effect, optimizing bioavailability, and compliance, lowering doses, and boosting therapeutic efficacy. However, the lack of selectivity at the cellular level hinders its ability to accomplish its potential to the fullest. The inclusion of surface functionalization to the lipidic NPs might certainly assist them in adapting to the basic biological demands of a specific pathological condition. Several ligands, including peptides, enzymes, polymers, saccharides, antibodies, etc., can be functionalized onto the surface of lipidic NPs to achieve cellular selectivity and avoid bioactivity challenges. This review provides a comprehensive outline for functionalizing lipid-based NPs systems in prominence over target selectivity. Emphasis has been put upon the strategies for reinforcing the therapeutic performance of lipidic nano carriers' using a variety of ligands alongside instances of relevant commercial formulations.


Assuntos
Sistemas de Liberação de Medicamentos , Lipídeos , Nanopartículas , Humanos , Nanopartículas/química , Lipídeos/química , Portadores de Fármacos/química , Animais , Lipossomos
12.
Colloids Surf B Biointerfaces ; 234: 113732, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38181691

RESUMO

Cabazitaxel has been approved for the treatment of prostate cancer since 2010. However, its poor solubility and permeability pitfalls prevent its accumulation at the target site and promote severe adverse effects. About 90% of prostate cancer (PCa) patients suffer from bone metastasis. This advent reports the development of CBZ-loaded pH-responsive polydopamine nanoparticles (CBZ NP) against metastatic PCa cells. Quality by design (QbD) and multivariate analysis tools were employed for the optimization of CBZ NP. Amorphisation of CBZ along with metastatic microenvironment responsive release was observed thereby imparting spatial release and circumventing solubility pitfalls. CBZ NP retained its cytotoxic potential, with a significant increase in quantitative cellular uptake. Apoptotic markers observed from nuclear staining with elevated reactive oxygen species (ROS) and mitochondrial damage revealed by JC-1 staining demonstrated the efficacy of CBZ NP against PC-3 cells with good serum stability and diminished hemolysis. Cell cycle analysis revealed substantial S and G2/M phase arrest with enhancement in apoptosis was observed. Western blot studies revealed an elevation in caspase-1 and suppression in Bcl-2 indicating enhanced apoptosis compared to the control group. Substantial reduction in the diameter of 3D-Tumoroid and enhanced cell proliferation inhibition indicated the efficacy of CBZ NP in PCa. Thus, we conclude that CBZ NP could be a promising Nanotherapeutic approach for PCa.


Assuntos
Antineoplásicos , Neoplasias da Próstata , Taxoides , Humanos , Masculino , Linhagem Celular Tumoral , Neoplasias da Próstata/tratamento farmacológico , Neoplasias da Próstata/patologia , Antineoplásicos/farmacologia , Antineoplásicos/uso terapêutico , Apoptose , Concentração de Íons de Hidrogênio , Microambiente Tumoral
13.
Drug Deliv Transl Res ; 14(5): 1218-1231, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-37903963

RESUMO

Bosutinib (BOS) is a BCS class IV drug that shows low oral bioavailability and high fast-fed variability. Various pharmaceutical formulations have been explored thus far in order to improve its bioavailability while avoiding fast-fed variability. In the present study, we explored cyclodextrin (CD) complexation strategy to overcome the aforementioned disadvantages associated with BOS. CD complexation is a simple, versatile and economic approach that enables formation of inclusion complexes, thereby improving aqueous solubility while nullifying pH-dependent solubility and fast-fed variability for poorly soluble drugs. Initially, we performed molecular dynamics and docking studies to select appropriate CD derivative. The results of in silico studies revealed that sulfo-butyl ether ß-cyclodextrin (SBE-CD) offered superior binding affinity with BOS. Further, Job's plot revealed that 1:1 stoichiometry of BOS and CD resulted in enhancement of BOS solubility up to ~ 132.6-folds. In vitro release studies in bio-relevant media (fasted and fed state simulated gastric and intestinal fluids) revealed higher drug release while overcoming its pH-dependent solubility. In vitro studies on K562 cells demonstrated a 1.83-fold enhancement in cytotoxicity due to enhanced ROS production and G2/M phase arrest.In vivo pharmacokinetic studies in Sprague-Dawley rats revealed insignificant fast-fed variability with AUCfast/fed 0.9493 and Cmaxfast/fed 0.8291 being closer to 1 in comparison with BOS. Hence, we conclude that SBE-CD complexation could be a promising approach in diminishing fast-fed variability of BOS.


Assuntos
Compostos de Anilina , Ciclodextrinas , Nitrilas , Quinolinas , beta-Ciclodextrinas , Ratos , Animais , Ratos Sprague-Dawley , beta-Ciclodextrinas/química , Ciclodextrinas/química , Solubilidade , Éteres
14.
J Microencapsul ; 41(1): 27-44, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-37982590

RESUMO

AIM: Our aim was to repurpose atorvastatin for melanoma by encapsulating in a nanostructured lipid carrier matrix to promote tumour cell internalisation and skin permeation. pH-responsive chitosan gel was employed to restrict At-NLCs in upper dermal layers. METHODS: We utilised a quality by design approach for encapsulating At within the NLC matrix. Further, cellular uptake and cytotoxicity was evaluated along with pH-responsive release and ex vivo skin permeation. RESULTS: Cytotoxicity assay showed 3.13-fold enhanced cytotoxicity on melanoma cells compared to plain drug with nuclear staining showing apoptotic markers. In vitro, release studies showed 5.9-fold rapid release in chitosan gel matrix at pH 5.5 compared to neutral pH. CONCLUSIONS: At-NLCs prevented precipitation, promoted skin permeation, and SK-MEL 28 cell internalisation. The localisation of NLCs on the upper dermal layer due to electrostatic interactions of skin with chitosan gel diminished the incidence of untoward systemic effects.


Assuntos
Quitosana , Melanoma , Nanoestruturas , Humanos , Portadores de Fármacos/farmacologia , Atorvastatina/farmacologia , Melanoma/tratamento farmacológico , Quitosana/farmacologia , Pele , Tamanho da Partícula
15.
Int J Biol Macromol ; 256(Pt 2): 128452, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38042321

RESUMO

Cancer is a devastating disease that causes a substantial number of deaths worldwide. Current therapeutic interventions for cancer include chemotherapy, radiation therapy, or surgery. These conventional therapeutic approaches are associated with disadvantages such as multidrug resistance, destruction of healthy tissues, and tissue toxicity. Therefore, there is a paradigm shift in cancer management wherein nanomedicine-based novel therapeutic interventions are being explored to overcome the aforementioned disadvantages. Supramolecular self-assembled peptide nanofibers are emerging drug delivery vehicles that have gained much attention in cancer management owing to their biocompatibility, biodegradability, biomimetic property, stimuli-responsiveness, transformability, and inherent therapeutic property. Supramolecules form well-organized structures via non-covalent linkages, the intricate molecular arrangement helps to improve tissue permeation, pharmacokinetic profile and chemical stability of therapeutic agents while enabling targeted delivery and allowing efficient tumor imaging. In this review, we present fundamental aspects of peptide-based self-assembled nanofiber fabrication their applications in monotherapy/combinatorial chemo- and/or immuno-therapy to overcome multi-drug resistance. The role of self-assembled structures in targeted/stimuli-responsive (pH, enzyme and photo-responsive) drug delivery has been discussed along with the case studies. Further, recent advancements in peptide nanofibers in cancer diagnosis, imaging, gene therapy, and immune therapy along with regulatory obstacles towards clinical translation have been deliberated.


Assuntos
Nanofibras , Neoplasias , Humanos , Nanofibras/química , Peptídeos/química , Sistemas de Liberação de Medicamentos/métodos , Neoplasias/tratamento farmacológico , Imunidade Celular
16.
Nanomedicine (Lond) ; 18(26): 1941-1959, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37991203

RESUMO

Aim: This work aims to synthesize the gold nanoparticles (GNPs) using a dual extract of tulsi and Vinca (T+V-Gold) for breast cancer tumor regression. Methods: The GNPs were synthesized and characterized for their microscopic, spectroscopic and crystalline properties. Further, the GNPs were investigated for in vitro and in vivo studies for the treatment of the 4T1-induced triple-negative breast cancer murine model. Results: The GNPs for 4T1 tumor-challenged mice resulted in delayed tumor development and lower tumor burden, with T+V-Gold demonstrating the highest prevention of tumor spread. The antitumor effect of T+V-Gold is highly significant in the glutathione family antioxidants glutathione S-transferase and glutathione in tumor tissue samples. Conclusion: The bioefficacy and anticancer outcomes of T+V-Gold nanoformulation can be used as therapeutic agents and drug-delivery vehicles.


Assuntos
Nanopartículas Metálicas , Neoplasias , Vinca , Camundongos , Animais , Ouro/química , Nanopartículas Metálicas/química , Glutationa/química
17.
Pharm Dev Technol ; 28(10): 1056-1078, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-38018532

RESUMO

Transethosomes, classified as 3rd generation nanocarriers, have gained global acclaim due to their profound potential in addressing diverse medical conditions. Their superior dermal penetration, attributed to essential constituents, such as edge activators and alcohol, sets them apart from other nanoformulations. The current review article embarks with an introduction followed by a comprehensive exploration of transethosome structures, differentiating them from fellow nanocarriers. A detailed analysis of characteristics and the spectrum of marketed products of various nanocarriers is also provided. Furthermore, the article offers a taxonomy of preparation methods of transethosomes and reports the frequently employed methods. It briefly surveys research studies encompassing various drug categories, spanning a wide range of medical conditions. In summary, this review article is dedicated to achieving several pivotal aims and objectives. We aim to substantiate the superior attributes of transethosomes when compared to conventional commercial products and other nanoformulations, demonstrating their clinical promise in addressing various human medical conditions. Additionally, we seek to elucidate the regulatory pathway required to secure approvals for transethosomes from relevant regulatory authorities and shine a light on their innovative potential as revealed in patent literature. Collectively, these objectives contribute to a comprehensive understanding of the significance and potential of transethosomes in the field of pharmaceutical nanotechnology.


Assuntos
Etanol , Absorção Cutânea , Humanos , Sistemas de Liberação de Medicamentos/métodos
18.
Radiat Prot Dosimetry ; 200(1): 75-83, 2023 Dec 29.
Artigo em Inglês | MEDLINE | ID: mdl-37840352

RESUMO

The Indian Environmental Radiation Monitoring Network continuously monitors the outdoor natural gamma absorbed dose rate in air at different locations throughout India by employing Geiger-Mueller (GM) detector-based field-installed environmental radiation monitors (ERMs). Hyderabad, Telangana, India is known to have high natural background radiation levels due to the presence of high concentrations of primordial radionuclides in its granitic rocks. There are a total of 59 ERMs installed at various locations across Hyderabad. Long-term monitoring data of these locations are presented in this paper. The mean values of outdoor natural gamma absorbed dose rate in air at the monitoring locations were found to vary in the range of 104-258 nGy.h-1 with a mean of 193 ± 40 nGy.h-1. The mean annual effective dose due to outdoor natural gamma radiation was estimated to be 0.24 ± 0.05 mSv.y-1. Analysis of the long-term seasonal variation of outdoor natural gamma absorbed dose rate in air showed that the same was lowest during monsoons.


Assuntos
Monitoramento de Radiação , Poluentes Radioativos do Solo , Raios gama , Poluentes Radioativos do Solo/análise , Radioisótopos , Índia , Radiação de Fundo , Doses de Radiação
19.
Radiat Prot Dosimetry ; 200(1): 1-11, 2023 Dec 29.
Artigo em Inglês | MEDLINE | ID: mdl-37712439

RESUMO

In this paper, the details of the development and performance characterisation of a compact, low-power gamma spectrometer for environmental gamma radiation monitoring networks are presented. To reduce the power consumption and the size of the spectrometer, a gamma detector comprising a silicon photomultiplier coupled to a Gd3Ga3Al2O12:Ce,B (GGAG:Ce,B) scintillator has been used for gamma spectrometry. Initially, a Monte Carlo simulation study was carried out to verify the suitability of the 5 mm × 5 mm × 5 mm GGAG:Ce,B crystal for spectrometry of gamma sources in the energy range 60-1332 keV. For minimising the power consumption, the signal processing electronics has been custom designed. This electronics was realised using standard off-the-shelf components to reduce the cost. The developed spectrometer is of size 16 cm × 10 cm × 6 cm, weighs 600 g and consumes 600 mW power. The spectrometer is developed such that it could be directly interfaced with GSM/Xbee for wireless communication with the radiation monitoring networks. The lower-level discriminator threshold of the system is 40 keV and the total electronic noise is <20 keV. The experimentally measured sensitivity of the spectrometer for 137Cs (662 keV) is 2.4 cps/µGy/h at 3.5 V overvoltage. The spectrometer offers excellent linearity over the measured energy range of 60-1332 keV and an energy resolution of ~10% for 662 keV gamma-ray at room temperature.


Assuntos
Radioisótopos de Césio , Monitoramento de Radiação , Raios gama , Simulação por Computador
20.
Phys Chem Chem Phys ; 25(36): 24613-24624, 2023 Sep 20.
Artigo em Inglês | MEDLINE | ID: mdl-37665020

RESUMO

In the modern era, realizing highly efficient supercapacitors (SCs) derived through green routes is paramount to reducing environmental impact. This study demonstrates ways to recycle and reuse used waste dry cell anodes to synthesize nanohybrid electrodes for SCs. Instead of contributing to landfill and the emission of toxic gas to the environment, dry cells are collected and converted into a resource for improved SC cells. The high performance of the electrode was achieved by exploiting battery-type polyoxometalate (POM) clusters infused on a reduced graphene oxide (rGO) surface. Polyoxometalate (K5[α-SiMo2VW9O40]) assisted in the precise bottom-up reduction of graphene oxide (GO) under UV irradiation at room temperature to produce vanadosilicate embedded photo-reduced graphene oxide (prGO-Mo2VW9O40). Additionally, a chemical reduction route for GO (crGO) was trialed to relate to the prGO, followed by the integration of a faradaic monolayer (crGO-Mo2VW9O40). Both composite frameworks exhibit unique hierarchical heterostructures that offer synergic effects between the dual components. As a result, the hybrid material's ion transport kinetics and electrical conductivity enhance the critical electrochemical process at the electrode's interface. The simple co-participation method delivers a remarkable specific capacity (capacitance) of 405 mA h g-1 (1622 F g-1) and 117 mA h g-1 (470 F g-1) for prGO-Mo2VW9O40 and crGO-Mo2VW9O40 nanocomposites alongside high capacitance retentions of 94.5% and 82%, respectively, at a current density of 0.3 A g-1. Furthermore, the asymmetric electrochromic supercapacitor crGO//crGO-Mo2VW9O40 was designed, manifesting a broad operating potential (1.2 V). Finally, the asymmetric electrode material resulted in an enhanced specific capacity, energy, and power of 276.8 C g-1, 46.16 W h kg-1, and 1195 W kg-1, respectively, at a current density of 0.5 A g-1. The electrode materials were tested in the operating of a DC motor.

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