Nanotechnology is indisputably a scientific technique that offers the prospect of new therapies, and hope, for the treatment of malignant illnesses. It is a novel technology that offers new approaches for the diagnosis and management of diverse diseases. Although the discovery of Quantum dots (QD) nano-transporters has already led to a few positive developments, QD nano-transporters are still at their initial stage, though have yet proven valuable to society. The excertion of QD indicates conversion in natural imaging along with photograph have established incredible suitability in bio-imaging, new drug development, targeted gene deliverance, biosensing, photodynamic treatment as well as diagnosis. The present review aimed to confer the significance of QD in diagnosis as well as in management of cancer. This review aims to impart fundamental insight as well as conception of QD its merits, properties, utilization as well as mode of action. This review highlight of different designing schemes of QD like hydrothermal, drop-casting, ultrasonic, solvothermal, spin-coating, atomic layer desorption, layer by layer, polymethylmethacrylate aided-transfer, electrochemical, ion beam sputtering deposition. Moreover, we have elaborated on the diverse researches related to cytotoxic examination to reveal that QDs are harmless. Concisely, the present review summarizes the fabrication schemes, current research and utilization of QD in cancer treatment.

Background & Objectives: Low penetration efficiency and retention time are the main therapeutic concerns that make it difficult for most of the drugs to be delivered to the intraocular tissues. These challenging issues are often related to those drugs, which have low or poor solubility and low permeability. The goal of this study was designed to develop nanostructured lipid carriers (NLCs) loaded with itraconazole (ITZ) with the objective of enhancing topical ocular permeation and thereby improving clinical efficacy. Materials and Methods: ITZ-loaded NLCs were fabricated by a high-speed homogenization technique using surfactant (Poloxamer 407), and lipids (stearic acid and oleic acid). Optimization of formulations was performed by 3 level factorial design and the selected formulation (F6) was evaluated by differential scanning calorimetry and transmission electron microscopy. Antifungal activity was assessed by measuring the zone of inhibition and irritation potential using the HET-CAM test. Results: The independent variables (lipid ratio-X1 and percentage of emulsifier-X2) have a positive impact on percentage entrapment efficiency (Y2) and percentage release (Y3) but have a negative impact on particle size (Y1). Based on the better entrapment efficiency (94.65%), optimum particle size (150.67 nm), and percentage cumulative drug release (68.67%), batch F6 was selected for further evaluation. Electron microscopic images revealed that the prepared particles are spherical and have nano size. Antifungal studies demonstrated enhancement in the zone of inhibition by formulation F6 as compared to a commercial eye drop. The non-irritancy of optimized formulation (F6) was confirmed with a zero score. Interpretation & Conclusion: In summary, the optimized NLCs seem to be a potent carrier for the effective delivery of itraconazole in ocular therapy. (c) 2021 The Author(s). Published by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Introduction: Many nanoformulations have been designed and evaluated for ocular drug delivery system consistently. These nanoformulations are designed for prolonged retention and course time, stable, efficient and reversible drug loading. The ocular bioavailability is very less when the drug is given through topically. Various anatomical and physiological limitations, for example, tear turnover, nasal lachrymal waste, reflex squinting, and visual static and dynamic hindrances cause the challenges and delay the ocular drug permeation because of the limitation that less than 5% dose can reach into the ocular tissues. Different types of Polymeric micelles were prepared to overcome the above challenges. Polymeric nano micelles are prepared by different methods, such as direct dissolution, dialysis method, Oil-in-water emulsion, solvent evaporation, co-solvent evaporation, and freeze-drying method.

Topical fungal infections are one of the often faced diseases worldwide. The first choice for the treatment of fungal infection is topical therapy due to its advantages such as decreasing the risk of systemic side effects and targeting the drug at the site of fungal infection. The treatment of the fungal infection depends on the penetration of the drug molecules through the outermost layer of the skin (stratum corneum) at an effective concentration. The disadvantages of topical treatment are its lack of drug adherence at the site of application and bigger particle size of drug molecules. Nanostructured lipid carriers are the advanced form of lipid nanoparticles and carry the nano range of the drug molecules, which helps to achieve localized and slow release. The topical route is generally preferred due to the possible side effects of oral medication. Advances in the field of formulation may soon render outdated conventional products such as creams, ointments, and gels. Several carrier systems loaded with antifungal drugs have shown promising results in the treatment of skin fungal infections.

The novel virus such as corona virus 2019 is the main cause of the disease that is declared by the WHO (World Health Origination). Some other virus similar to this virus were also discovered in initial year of 21th century such as SARS-CoV in 2003, HCoV NL63 in 2004, HKU1 in 2005, MERS-CoV in 2012, and SARS-CoV-2 in 2019. The first few cases of covid-19 were detected from direct contact to the infected animal to human which is also called as animal to human transmission. Due to direct exposure of this virus to infected animals the human to human transmission of the virus is as well possible, which is also likely to be consider and measured as core form of transmission. According to the reports of WHO by 26 February 2020, patients suffering from COVID-19 reduced gradually in China but rapidly increased in countries like Italy, Iran and South Korea. The infection caused by the COVID 19 is detected by looking at the symptoms and it ultimately confirmed by the reverse transcription polymerase chain reaction (rRT-PCR) of infected secretions with 71% sensitivity and computed tomography scan with 98%. The antimalarial medicate, hydroxychloroquine, is authorized for the chemoprophylaxis and treatment of intestinal sickness and as a disease changing antirheumatic drugs. Pharmacological demonstrating dependent on observed drug absorptions and in vitro drug testing propose that prophylaxis with hydroxychloroquine at affirmed portions could anticipate SARS-CoV-2 contamination and improve viral shedding. Clinical preliminaries of hydroxychloroquine treatment for COVID-19 pneumonia are in progress in China (NCT04261517 and NCT04307693).

BACKGROUND:Development of polymeric micelles for the management of allergic conjunctivitis to overcome the limitations of topical installation, such as poor patient compliance, poor stromal permeability, and significant adverse effects, increase precorneal residence time and efficacy, and also control the release of drug at the target site.OBJECTIVE:The investigation was aimed at developing a polymeric micellar system of Azelastine HCl for Ocular Delivery.METHODS:Drug loaded micelles of tri-block copolymers Pf 127 were prepared by Thin Film hydration method. The polymeric micelles formulations (F1 to F9) were assessed for entrapment efficiency, micelle size, in vitro permeation, ex vivo transcorneal permeation, in vivo Ocular Irritation, and Histology.RESULTS:Optimized micelles formulation (F3), with the lowest micelle size of 92 nm, least polydispersity value of 0.135, highest entrapment efficiency of 95.30 ± 0.17%, and a cumulative drug permeation of 84.12 ± 1.26% in 8h, was selected to develop pH-sensitive micelles loaded carbopol in situ gel. The optimized in situ gel (G4) proved to be superior in its ex vivo transcorneal permeation when compared with Market Preparation and pure drug suspension, exhibiting 43.35 ± 1.48% Permeation with zero-order kinetics (r2 = 0.9944) across goat cornea. Transmission Electron microscopy revealed spherical polymeric micelles trapped in the gel matrix. A series of experiments showed hydration capability, non-irritancy, and histologically safe gel formulation that had appropriate handling characteristics.CONCLUSION:A controlled release pH-sensitive ocular formulation capable of carrying the drug to the anterior section of the eye via topical delivery was successfully developed for the treatment of allergic conjunctivitis.