106 results on '"Narang RK"'
Search Results
2. TOPICAL DELIVERY OF NANOEMULSION FOR ANTIPSORIATIC DRUGS
- Author
-
Khurana, Bharat, Arora, Daisy, Narang, RK, Khurana, Bharat, Arora, Daisy, and Narang, RK
- Abstract
Psoriasis is an autoimmune disorder of the skin characterized by relapsing episodes of inflammatory lesions and hyperkeratotic plaques with worldwide occurrence of around 2–5%. Psoriasis is a disease known to be caused by multitude of both genetic and environmental factors such as trauma, drugs, infection, alcohol, smoking and stress but its accurate origin is still not known. Further, available treatment options are associated with both inappropriate cosmetic appearance and related toxicities leading to poor patient compliance in long term use. Nanotechnology based drug delivery system has immense potential to enhance the bioavailability and effectiveness of drugs in their dosage forms, especially lipophilic drugs. Lipid based carrier system can overcome the lipid imbalance and normal moisturizing factors. Nanoemulsions, as one of a new carrier apparently have the prospective to conquer numerous problems related with topical antipsoriatic therapy. This delivery system could perhaps offer a good alternative in topical psoriasis treatment. Not only on how nanoemulsions prepared, but it depends on the active ingredients used and the selection of oil could as well enhance the efficiency of topical treatment towards psoriasis. A good combination of both active and suitable oils would result a better treatment and better effect. Keywords: Topical nanoemulsion, Antipsoriatic therapy, Critical quality attributes.
- Published
- 2018
3. TOPICAL DELIVERY OF NANOEMULSION FOR ANTIPSORIATIC DRUGS
- Author
-
Khurana, Bharat, primary, Arora, Daisy, primary, and Narang, RK, primary
- Published
- 2018
- Full Text
- View/download PDF
4. S74 Is bronchoscopy needed in children with persistent bacterial bronchitis?
- Author
-
Narang, RK, primary, Bakewell, K, additional, Peach, J, additional, Clayton, S, additional, Samuels, M, additional, Alexander, J, additional, Lenney, W, additional, and Gilchrist, FJ, additional
- Published
- 2013
- Full Text
- View/download PDF
5. Pharmacokinetic study of antipyrine in malnourished children
- Author
-
Narang, RK, primary, Mehta, S, additional, and Mathur, VS, additional
- Published
- 1977
- Full Text
- View/download PDF
6. Collagen and chitosan-based biogenic sprayable gel of silver nanoparticle for advanced wound care.
- Author
-
Markandeywar TS and Narang RK
- Abstract
Silver nanoparticles have gained significant attention recently due to their unique antibacterial properties, making them promising candidates for wound care applications. This study proposes a novel approach for advanced wound care using a silver nanoparticle-impregnated biogenic spray hydrogel supplemented with collagen and chitosan. Silver nanoparticles were incorporated into the hydrogel (optimized by a QbD approach) to impart antimicrobial activity, crucial for combating wound infections and promoting faster healing. The study assessed the physical and chemical properties of the biogenic hydrogel, including its viscosity, pH, and nanoparticle dispersion characteristics. In vitro, antimicrobial efficacy against common wound pathogens and in vivo studies using chronic wound models in small animals portrayed the immense potential of the developed biogenic hydrogel in effectively reducing the bacterial load of broad-spectrum pathogens. The hydrogel exhibited excellent biocompatibility, supporting cell proliferation and tissue repair without toxic effects. It accelerated wound healing, improved collagen deposition, and enhanced tissue regeneration in the tested animals by reducing proinflammatory cytokines, ROS, and NF-kb levels. Overall, this innovative silver nanoparticle-impregnated biogenic spray hydrogel of collagen and chitosan presents a uniform spray pattern that proved efficient, showing a promising solution for advanced wound care. Its biocompatibility, safety, anti-inflammatory, antimicrobial efficacy, and wound healing properties hold great potential for improving the management of complex wounds, opening new avenues in wound care and regenerative medicine., Competing Interests: Declarations. Ethical approval: The studies were carried out according to the guidelines of the Council for the Purpose of Control and Supervision of Experiments on Animals (CPCSEA), Ministry of Social Justice and Empowerment, Government of India. Healthy Wistar rats (170–230 g) of either sex or bred in the animal house of ISF College of Pharmacy-Moga, Punjab, were used in various animal studies. All animal experimentations were carried out as per the approved protocol no. ISFCP/IAEC/CPCSEA/Meeting No. 01/2022/ Protocol No. 01 by the Institutional animal ethical committee (IAEC) formed as per the norms of CPCSEA. Experimental animals were subjected to standard laboratory conditions (i.e., room temperature, 23±2 °C; relative humidity, 55±5%; 12/12 h light/dark cycle) with free access to animal feed and water before experimentation. Competing interests: The authors declare no competing interests., (© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
- Published
- 2024
- Full Text
- View/download PDF
7. "Enhancing Oral Drug Absorption: Overcoming Physiological and Pharmaceutical Barriers for Improved Bioavailability".
- Author
-
Maurya R, Vikal A, Patel P, Narang RK, and Kurmi BD
- Subjects
- Administration, Oral, Humans, Pharmaceutical Preparations administration & dosage, Pharmaceutical Preparations chemistry, Pharmaceutical Preparations metabolism, Drug Carriers chemistry, Animals, Chemistry, Pharmaceutical methods, Intestinal Absorption physiology, Permeability, Micelles, Nanoparticles chemistry, Lipids chemistry, Biological Availability, Drug Delivery Systems methods, Solubility
- Abstract
The oral route stands out as the most commonly used method for drug administration, prized for its non-invasive nature, patient compliance, and easy administration. Several elements influence the absorption of oral medications, including their solubility, permeability across mucosal membranes, and stability within the gastrointestinal (GI) environment. Research has delved into comprehending physicochemical, biochemical, metabolic, and biological obstacles that impact the bioavailability of a drug. To improve oral drug absorption, several pharmaceutical technologies and delivery methods have been studied, including cyclodextrins, micelles, nanocarriers, and lipid-based carriers. This review examines both traditional and innovative drug delivery methods, as well as the physiological and pharmacological barriers influencing medication bioavailability when taken orally. Additionally, it describes the challenges and advancements in developing formulations suitable for oral use., (© 2024. The Author(s), under exclusive licence to American Association of Pharmaceutical Scientists.)
- Published
- 2024
- Full Text
- View/download PDF
8. Polymeric micelle gel with luliconazole: in vivo efficacy against cutaneous candidiasis in Wistar rats.
- Author
-
Singh G and Narang RK
- Subjects
- Animals, Candidiasis drug therapy, Candidiasis microbiology, Rats, Male, Drug Liberation, Drug Carriers chemistry, Skin metabolism, Skin drug effects, Skin microbiology, Microbial Sensitivity Tests, Hydrogels, Poloxamer chemistry, Particle Size, Skin Absorption, Polymers chemistry, Gels, Micelles, Antifungal Agents pharmacology, Antifungal Agents administration & dosage, Rats, Wistar, Candida albicans drug effects, Imidazoles pharmacology, Imidazoles administration & dosage
- Abstract
The objective of this research was focused on the design and development of luliconazole-loaded polymeric micelle hydrogel (LUL-PM-CHG) using quality by design (QbD) principle to improve the penetration and retention of LUL in the skin. The optimization of the formulation involved the utilization of a Box-Behnken design with three factors and three levels. The impact of specific formulation variables, namely the ratio of poloxamer P123 and F127, sonication time, and the quantity of drug, was investigated in terms of particle size, micellar incorporation efficiency, and polydispersity index. The LUL-loaded P123/F127 mixed micelles involved the thin film hydration method for thin preparation. The characteristics of optimized formulation include a particle size of 226 ± 8.52 nm, a polydispersity index (PDI) of 0.153 ± 0.002, a zeta potential (ZP) of 30.15 ± 2.32 mV, and a micellar incorporation efficiency (MIE) of 88.38 ± 3.84%. In vitro release studies indicated a sustained release of LUL-PM-CHG for a duration of up to 8 h. The MIC, GI
50 , and GI90 of different formulations on Candida albicans were determined using both the microtiter broth dilution method and the plate method and showed that LUL-PM-CHG exhibited the highest antifungal activity compared to the other formulations, with MIC values of 3.25 ± 0.19 ng/mL, GI50 values of 37.11 ± 2.89, and GI90 values of 94.98 ± 3.41 The study also measured the % of inhibition activity and the generation of intracellular reactive oxygen species (ROS) using flow cytometry. LUL-PM-CHG showed the highest percentage of inhibition (75.5%) and ROS production (MFI-140951), indicating its enhanced activity compared to LUL-CHG and LUL. Fungal infection was induced in Wistar rats using immunosuppressant's treatment followed by exposure to C. albicans. Finally, in vivo fungal scaling and histopathological studies indicated a reduction in fungal infection in Wistar rat skin after treatment. The obtained results suggested that LUL-PM can serve as a promising formulation to enhance luliconazole antifungal activity and increase patient compliance., (© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)- Published
- 2024
- Full Text
- View/download PDF
9. Enhanced antichemobrain activity of amino acid assisted ferulic acid solid dispersion in adult zebrafish (Danio rerio).
- Author
-
Shukla D, Kaur S, Singh A, Narang RK, and Singh C
- Subjects
- Animals, Amino Acids chemistry, Drug Liberation, Neuroprotective Agents chemistry, Neuroprotective Agents administration & dosage, Neuroprotective Agents pharmacology, Cognitive Dysfunction drug therapy, Cognitive Dysfunction chemically induced, Drug Carriers chemistry, Oxidative Stress drug effects, Coumaric Acids chemistry, Coumaric Acids pharmacology, Coumaric Acids administration & dosage, Zebrafish, Antioxidants chemistry, Antioxidants pharmacology, Antioxidants administration & dosage
- Abstract
Chemotherapy-induced cognitive impairment (CICI), also known as "chemobrain," is a common side effect of breast cancer therapy which causes oxidative stress and generation of reactive oxygen species (ROS). Ferulic acid (FA), a natural polyphenol, belongs to BCS class II is confirmed to have nootropic, neuroprotective and antioxidant effects. Here, we have developed FA solid dispersion (SD) in order to enhance its therapeutic potential against chemobrain. An amorphous ferulic acid loaded leucin solid dispersion (FA-Leu SD) was prepared by utilizing amino acid through spray-drying technique. The solid-state characterization was carried out via Fourier-transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), X-ray diffraction (XRD), and field emission scanning electron microscopy (FE-SEM). Additionally, in-vitro release studies and antioxidant assay were also performed along with in-vivo locomotor, biochemical and histopathological analysis. The physical properties showed that FA-Leu SD so formed exhibited spherical, irregular surface hollow cavity of along with broad melting endotherm as observed from FE-SEM and DSC results. The XRD spectra demonstrated absence of sharp and intense peaks in FA-Leu SD which evidenced for complete encapsulation of drug into carrier. Moreover, in-vitro drug release studies over a period of 5 h in PBS (pH 7.4) displayed a significant enhanced release in the first hr (68. 49 ± 5.39%) and in-vitro DPPH assay displayed greater antioxidant potential of FA in FA-Leu SD. Furthermore, the in-vivo behavioral findings of FA-Leu SD (equivalent to 150 mg/kg of free FA) exhibited positive results accompanied by in-vivo biochemical and molecular TNF-α showed a significant difference (p < 0.001) vis-à-vis DOX treated group upon DOX + FA-Leu SD. Additionally, histopathological analysis revealed neuroprotective effects of FA-Leu SD together with declined oxidative stress due to antioxidant potential of FA which was induced by anticancer drug doxorubicin (DOX). Overall, the above findings concluded that spray-dried FA-Leu SD could be useful for the treatment of chemotherapy induced cognitive impairment., (© 2024. Controlled Release Society.)
- Published
- 2024
- Full Text
- View/download PDF
10. Recent advancements and applications of ophthalmic gene therapy strategies: A breakthrough in ocular therapeutics.
- Author
-
Maurya R, Vikal A, Narang RK, Patel P, and Kurmi BD
- Subjects
- Humans, Eye Diseases therapy, Eye Diseases genetics, Gene Transfer Techniques, Retinal Diseases therapy, Retinal Diseases genetics, Animals, Genetic Therapy methods, Genetic Vectors
- Abstract
Over the past twenty years, ocular gene therapy has primarily focused on addressing diseases linked to various genetic factors. The eye is an ideal candidate for gene therapy due to its unique characteristics, such as easy accessibility and the ability to target both corneal and retinal conditions, including retinitis pigmentosa (RP), Leber congenital amaurosis (LCA), age-related macular degeneration (AMD), and Stargardt disease. Currently, literature documents 33 clinical trials in this field, with the most promising results emerging from trials focused on LCA. These successes have catalyzed further research into other ocular conditions such as glaucoma, AMD, RP, and choroideremia. The effectiveness of gene therapy relies on the efficient delivery of genetic material to specific cells, ensuring sustained and optimal gene expression over time. Viral vectors have been widely used for this purpose, although concerns about potential risks such as immune reactions and genetic mutations have led to the development of non-viral vector systems. Preliminary laboratory research and clinical investigations have shown a connection between vector dosage and the intensity of immune response and inflammation in the eye. The method of administration significantly influences these reactions, with subretinal delivery resulting in a milder humoral response compared to the intravitreal route. This review discusses various ophthalmic diseases, including both corneal and retinal conditions, and their underlying mechanisms, highlighting recent advances and applications in ocular gene therapies., (Copyright © 2024 Elsevier Ltd. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
11. Emergence of COVID-19's JN.1 Subvariant Sparks Outbreak in India.
- Author
-
Diksha, Kamal R, John O, Narang RK, and Singh A
- Published
- 2024
- Full Text
- View/download PDF
12. A Comprehensive Approach to Managing Respiratory Illnesses Among Children in Northern China.
- Author
-
Diksha, Kamal R, Narang RK, and Singh A
- Published
- 2024
- Full Text
- View/download PDF
13. A Global Approach to Hib: Vaccine Innovations, Epidemiological Patterns, and Worldwide Consequences.
- Author
-
Kaur S, Diksha, Narang RK, and Singh A
- Published
- 2024
- Full Text
- View/download PDF
14. Evaluating the Imperative Role of Pre- and Post-eCTD Standards in Dossier Validation: An Inevitable Outlook.
- Author
-
Patil NS, Ranjan A, Narang RK, and Singh A
- Published
- 2024
- Full Text
- View/download PDF
15. Recent Trends in Nanocarrier-Based Drug Delivery System for Prostate Cancer.
- Author
-
Kumar A, Lunawat AK, Kumar A, Sharma T, Islam MM, Kahlon MS, Mukherjee D, Narang RK, and Raikwar S
- Subjects
- Male, Humans, Drug Delivery Systems, Kinetics, Solubility, Tumor Microenvironment, Prostatic Neoplasms drug therapy, Nanoparticles
- Abstract
Prostate cancer remains a significant global health concern, requiring innovative approaches for improved therapeutic outcomes. In recent years, nanoparticle-based drug delivery systems have emerged as promising strategies to address the limitations of conventional cancer chemotherapy. The key trends include utilizing nanoparticles for enhancing drug delivery to prostate cancer cells. Nanoparticles have some advantages such as improved drug solubility, prolonged circulation time, and targeted delivery of drugs. Encapsulation of chemotherapeutic agents within nanoparticles allows for controlled release kinetics, reducing systemic toxicity while maintaining therapeutic efficacy. Additionally, site-specific accumulation within the prostate tumor microenvironment is made possible by the functionalization of nanocarrier with targeted ligands, improving therapeutic effectiveness. This article highlights the basics of prostate cancer, statistics of prostate cancer, mechanism of multidrug resistance, targeting approach, and different types of nanocarrier used for the treatment of prostate cancer. It also includes the applications of nanocarriers for the treatment of prostate cancer and clinical trial studies to validate the safety and efficacy of the innovative drug delivery systems. The article focused on developing nanocarrier-based drug delivery systems, with the goal of translating these advancements into clinical applications in the future., (© 2024. The Author(s), under exclusive licence to American Association of Pharmaceutical Scientists.)
- Published
- 2024
- Full Text
- View/download PDF
16. Endothelial Progenitor Cell (EPC) is a Prime Target in Diabetic Wound Healing: Mechanisms and Target Therapies.
- Author
-
Markandeywar TS, Singh D, Singh G, Kurmi BD, and Narang RK
- Subjects
- Humans, Animals, Diabetes Mellitus therapy, Diabetes Mellitus pathology, Endothelial Progenitor Cells metabolism, Wound Healing
- Published
- 2024
- Full Text
- View/download PDF
17. Quality by Design Assisted Development of Luliconazole Transethosomes in Gel for the Management of Candida albicans Infection.
- Author
-
Singh G and Narang RK
- Subjects
- Rats, Animals, Administration, Cutaneous, Drug Carriers chemistry, Rats, Wistar, Candida albicans, Antifungal Agents pharmacology, Antifungal Agents chemistry, Imidazoles
- Abstract
The objective of this study was to develop and evaluate a novel vesicular formulation of luliconazole (LUL) for the management of Candida albicans infection through a topical route. LUL-loaded transethosomes (LUL-TE) were prepared by the film hydration method and various independent and dependent variables were optimized using the Box-Behnken design. Selected critical material attributes were the content of phospholipids (X1), concentration of ethanol (X2), and amount of sodium cholate (X3). Formulated LUL-TE were characterized for percent entrapment efficiency, percent drug loading, vesicle size, and polydispersity index (PDI) and were incorporated into the carbomer gel base and further evaluated for gel characterizations. The prepared transethosomal gel (LUL-TE-CHG) was evaluated for pH, spreadability, viscosity, antifungal activity, and in vitro study. From the observed results, it was evident that the prepared LUL-TE-CHG was in the desired pH (6.2 ± 0.45), spreadability [8.3 ± 0.42 g/(cm·s)], viscosity (236.1-19.2.26 mPa·s), nanovesicle size (252 ± 9.82), entrapment efficiency (85% ± 5.24%), zeta potential (-34.05 ± 3.52 mV), and PDI (0.233 ± 0.002). The zone of inhibition results suggested that the LUL-TE-CHG formulation has the highest antifungal activity, that is, 5.83 ± 0.15 mm
3 . The in vitro results showed that drug release within 2 h was 18.1% ± 2.0% and after that sustained release action, 83.2% ± 1.7% within 8 h. Finally, to confirm the therapeutic efficacy of the developed formulation, fungal infection was induced by using C. albicans in Wistar rats. In vivo , skin irritation study and histopathology studies were performed in the disease-induced model. Animal experiments revealed that LUL-TE-CHG has significantly improved the diseased condition in Wistar rats. The results observed from the skin permeation and skin deposition profile ensure that the prepared novel LUL-loaded TE system had a higher permeation rate and increased retention time compared with LUL-CHG. The hydrogel incorporated with LUL could be a novel approach with safe and effective fungal treatment.- Published
- 2024
- Full Text
- View/download PDF
18. GABA-transaminase: A Key Player and Potential Therapeutic Target for Neurological Disorders.
- Author
-
Grover S, Narang RK, and Singh S
- Subjects
- Humans, Animals, gamma-Aminobutyric Acid metabolism, 4-Aminobutyrate Transaminase metabolism, 4-Aminobutyrate Transaminase antagonists & inhibitors, Nervous System Diseases drug therapy, Nervous System Diseases metabolism
- Abstract
Neurological disorders such as epilepsy, autism, Huntington's disease, multiple sclerosis, and Alzheimer's disease alter brain functions like cognition, mood, movements, and language, severely compromising the well-being of persons, suffering from their negative effects. The neurotransmitters (GABA, glutamate, norepinephrine, dopamine) are found to be involved in neuronal signaling and neurotransmission. GABA, a "commanding neurotransmitter" is directly or indirectly associated with various neurological disorders. GABA is metabolized to succinic semialdehyde by a mitochondrial gamma-aminobutyric acid-transaminase (GABA-T) enzyme. Therefore, the alterations in the GABA performance in the distinct regions of the brain via GABA-T overstimulation or inhibition would play a vital role in the pathogenesis of various neurological disorders. This review emphasizes the leading participation of GABA-T in neurological disorders like Huntington's disease, epilepsy, autism, Alzheimer's disease, and multiple sclerosis. In Huntington's disease, epilepsy, and multiple sclerosis, the surfeited performance of GABA-T results in diminished levels of GABA, whereas in autism, the subsidence of GABA-T activity causes the elevation in GABA contents, which is responsible for behavioral changes in these disorders. Therefore, GABA-T inhibitors (in Huntington's disease, epilepsy, and multiple sclerosis) or agonists (in autism) can be used therapeutically. In the context of Alzheimer's disease, some researchers favor the stimulation of GABA-T activity whereas some disagree with it. Therefore, the activity of GABA-T concerning Alzheimer's disease is still unclear. In this way, studies of GABA-T enzymatic activity in contrast to neurological disorders could be undertaken to understand and be considered a therapeutic target for several GABA-ergic CNS diseases., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
- Published
- 2024
- Full Text
- View/download PDF
19. Investigation of the anti-cancer potential of epoxyazadiradione in neuroblastoma: experimental assays and molecular analysis.
- Author
-
Chandel S, Bhattacharya A, Gautam A, Zeng W, Alka O, Sachsenberg T, Gupta GD, Narang RK, Ravichandiran V, and Singh R
- Subjects
- Humans, Cell Line, Tumor, Proteomics methods, Molecular Dynamics Simulation, HSP90 Heat-Shock Proteins metabolism, HSP90 Heat-Shock Proteins antagonists & inhibitors, HSP90 Heat-Shock Proteins chemistry, Phosphopyruvate Hydratase metabolism, Phosphopyruvate Hydratase genetics, Cell Cycle Checkpoints drug effects, Neuroblastoma drug therapy, Neuroblastoma metabolism, Neuroblastoma pathology, Molecular Docking Simulation, Apoptosis drug effects, Cell Proliferation drug effects, Limonins pharmacology, Limonins chemistry, Antineoplastic Agents pharmacology, Antineoplastic Agents chemistry
- Abstract
Neuroblastoma, the most common childhood solid tumor, originates from primitive sympathetic nervous system cells. Epoxyazadiradione (EAD) is a limonoid derived from Azadirachta indica , belonging to the family Meliaceae. In this study, we isolated the EAD from Azadirachta indica seed and studied the anti-cancer potential against neuroblastoma. Herein, EAD demonstrated significant efficacy against neuroblastoma by suppressing cell proliferation, enhancing the rate of apoptosis and cycle arrest at the SubG
0 and G2 /M phases. EAD enhanced the pro-apoptotic Caspase 3 and Caspase 9 and inhibited the NF-kβ translocation in a dose-dependent manner. In order to identify the specific EAD target, a gel-free quantitative proteomics study on SH-SY5Y cells using Liquid Chromatography with tandem mass spectrometry was done in a dose-dependent manner, followed by detailed bioinformatics analysis to identify effects on protein. Proteomics data identified that Enolase1 and HSP90 were up-regulated in neuroblastoma. EAD inhibited the expression of Enolase1 and HSP90, validated by mRNA expression, immunoblotting, Enolase1 and HSP90 kit and flow-cytometry based bioassay. Molecular docking study, Molecular dynamic simulation, and along with molecular mechanics/Poisson-Boltzmann surface area analysis also suggested that EAD binds at the active site of the proteins and were stable throughout the 100 ns Molecular dynamic simulation study. Overall, this study suggested EAD exhibited anti-cancer activity against neuroblastoma by targeting Enolase1 and HSP90 pathways.Communicated by Ramaswamy H. Sarma.- Published
- 2024
- Full Text
- View/download PDF
20. Glabridin mitigates TiO 2 NP induced cognitive deficit in adult zebrafish.
- Author
-
Kaur K, Narang RK, and Singh S
- Subjects
- Animals, Phenols pharmacology, Oxidative Stress, Cognition, Zebrafish, NF-E2-Related Factor 2 metabolism
- Abstract
Glabridin is extracted from the roots of Glycyrrhiza glabra, which has anti-oxidative and anti-inflammatory properties. We investigated the neuroprotective potential of Glabridin against the learning and memory deficit by triggering NRF2/HO-1 signaling in Titanium dioxide nanoparticles (TiO
2 NP) treated zebrafish. Our study suggests that Glabridin at doses of 12.5, 25, and 50 mg/kg/day for 7 days improved memory and lowered anxiety in the novel object recognition test, T-maze, and novel diving tank respectively. Biochemical analysis showed that Glabridin treatment in TiO2 NP-exposed zebrafish enhanced GSH, CAT, SOD, and GPx activity and reduced MDA levels; inhibited proinflammatory mediators, namely, TNF-α, IL-1β, and IL-6. In histopathological evaluation, Glabridin significantly reduced pycnotic neurons in TiO2 NP-treated zebrafish brains. Furthermore, Glabridin upregulated NRF2 and HO-1 levels, which leads to a decline in oxidative stress and neuroinflammation and were reversed by ML385 treatment. ML385 as a probe molecule that specifically inhibit NRF2 and prevents its downstream gene expression. Thus, these considerable outcomes provide new insights into the neuroprotective effect of glabridin., Competing Interests: Declaration of competing interest All authors declare no conflict of interest., (Copyright © 2023. Published by Elsevier Ltd.)- Published
- 2023
- Full Text
- View/download PDF
21. Role of Nrf2 in Oxidative Stress, Neuroinflammation and Autophagy in Alzheimer's Disease: Regulation of Nrf2 by Different Signaling Pathways.
- Author
-
Kaur K, Narang RK, and Singh S
- Abstract
Alzheimer's disease (AD) is an age-dependent neurodegenerative disorder and the leading cause of dementia. AD is characterized by the aggregation of amyloid-ß (Aß) peptide, increased levels of tau protein, and loss of redox homeostasis responsible for mitochondrial dysfunction, oxidative stress, and neuroinflammation. Excessive accumulation of toxic Aß plaques activates microglia, which initiates neuroinflammation and consequently accelerates synaptic damage and neuronal loss. Various proinflammatory cytokines release, microglia proliferation, reactive astrocyte, and oxidative (reactive oxygen species (ROS) production, level of antioxidant enzymes, redox homeostasis, and lipid peroxidation) stress play a major role in AD. Several studies revealed that nuclear factor erythroid 2-related factor 2 (Nrf2) regulates redox homeostasis and works as an anti-inflammatory in various neurodegenerative disorders. D-Glutamate expression of transcription factor Nrf2 and its genes (glutamate-cysteine ligase catalytic subunit (GCLC), Heme oxygenase-1 (HO-1), and NADPH quinone oxidoreductase I (NQO1)) has been found in AD. Nrf2-HO-1 enhances the expression of antioxidant genes, inhibits microglia-mediated inflammation, and boosts mitochondrial function, suggesting that modulators of this protein may be useful to manage AD. This review focuses on the role of Nrf2 in AD, with a particular emphasis on the various pathways involved in the positive and negative modulation of Nrf2, namely Phosphoinositide 3-kinase (PI3K), Glycogen synthase kinase-3 (GSK-3), Nuclear factor kappa-B (NF-κB), and p38Mitogen-activated protein kinases (p38MAPK). Also, we have discussed the progress and challenges regarding the Nrf2 activators for AD treatment., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
- Published
- 2023
- Full Text
- View/download PDF
22. Fluorescence Resonance Energy Transfer (FRET) based Sensors: An Advanced Multifactorial Approach in Modern Analysis.
- Author
-
Bhatia R, Singh A, and Narang RK
- Subjects
- Fluorescence Resonance Energy Transfer
- Published
- 2023
- Full Text
- View/download PDF
23. The Marburg Virus Outbreak in West Africa.
- Author
-
Sahoo S, Narang RK, and Singh A
- Subjects
- Humans, Africa, Western epidemiology, Disease Outbreaks, Marburgvirus
- Published
- 2023
- Full Text
- View/download PDF
24. Targeted Delivery of Doxorubicin as a Potential Chemotherapeutic Agent.
- Author
-
Markandeywar TS, Narang RK, Singh D, and Rai VK
- Subjects
- Female, Humans, Doxorubicin, Drug Delivery Systems, Drug Carriers therapeutic use, Breast Neoplasms drug therapy, Antineoplastic Agents therapeutic use
- Abstract
Cancer is the world's fifth-most significant cause of related death and the second most commonly diagnosed malignancy among women and men. Some of its types, like brain cancer, colon cancer, and breast cancer, are threatened and considered fatal. These cancers are more prevalent in developed and underdeveloped countries. Still, doxorubicin is considered a gold standard drug and the only molecule used in multiple types of cancer. However, the toxicity and biopharmaceutical hindrances like poor solubility, poor permeability, and high in vivo fate of drug cause low systematic circulation. The creation of a multifunctional nanocarrier for targeted medication delivery that can transport and accumulate drugs at cancer sites should help to lessen the likelihood of side effects. These nanocarriers improve the targetability of infected tissue and the therapeutic circulation of drugs. Hence, the present review focused on the improved targetability of doxorubicin using different nanocarriers and its possible outcomes in different types of cancer. Moreover, the prior art also discussed various challenges and prospects of improved doxorubicin delivery and its therapeutic outcomes., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
- Published
- 2023
- Full Text
- View/download PDF
25. AlCl 3 induced learning and memory deficit in zebrafish.
- Author
-
Kaur K, Narang RK, and Singh S
- Subjects
- Aluminum, Aluminum Chloride toxicity, Animals, Chlorides toxicity, Dopamine pharmacology, Glutamates metabolism, Glutathione metabolism, Malondialdehyde, Memory Disorders chemically induced, Memory Disorders drug therapy, NF-E2-Related Factor 2 metabolism, Neurotransmitter Agents pharmacology, Norepinephrine, Oxidative Stress, Reactive Oxygen Species, Serotonin metabolism, Superoxide Dismutase metabolism, gamma-Aminobutyric Acid pharmacology, Neuroprotective Agents pharmacology, Zebrafish metabolism
- Abstract
Aluminium is a metal known to cause neurotoxicity in the brain, by promoting neurodegeneration and affecting memory and cognitive ability. AlCl
3 has been reported to enhance reactive oxygen species (ROS) and inflammatory markers which are further responsible for the degeneration of neurons. AlCl3 exposure to zebrafish causes behavioral, biochemical, and neurochemical changes in the brain. In our study, Zebrafish were exposed to AlCl3 at three different doses (50 µg/L, 100 µg/L, and 200 µg/L) for four consecutive days. On days 1st and 4th, a novel diving test was performed to check anxiety in zebrafish. T - maze and novel object recognition test were used to check the memory on days 3rd and 4th with the help of ANY-maze software. On the last day (4th day), zebrafishes were sacrificed and whole brains were used to perform the biochemical, neurotransmitters, histopathological, and immunohistochemistry analysis. Our study revealed that AlCl3 exposure significantly decreased the total distance traveled, and the number of entries in the top zone and increased the time spent in the bottom zone, checked through the novel diving test. In the T maze test, AlCl3 treated zebrafish showed significantly increased transfer latency to the favorable zone and time spent, and the number of entries to the unfavorable zone. The exploration time with the novel object was reduced significantly after AlCl3 treatment. Moreover, reduced glutathione (GSH) and superoxide dismutase (SOD) levels were significantly reduced in AlCl3 treated zebrafish whereas malondialdehyde (MDA) level was found to be increased, indicating high oxidative stress. The neurotransmitters level was also disturbed indicated by the significantly decreased GABA, dopamine, noradrenaline, and Serotonin levels and increased glutamate level in the brain of zebrafish treated with AlCl3 . Moreover, histopathological and immunohistochemistry study shows a markedly increased number of pyknotic neurons and reduced the expression of Nrf2 in the zebrafish brain after AlCl3 exposure. These findings suggest that AlCl3 significantly causes behavioral, biochemical, neurotransmitters, morphological, and molecular changes in zebrafish, ultimately causing AD., Competing Interests: Declaration of Competing Interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Shamsher Singh reports was provided by Indo Soviet Friendship College of Pharmacy. Shamsher Singh reports a relationship with Indo Soviet Friendship College of Pharmacy that includes:. Shamsher Singh has No patent pending., (Copyright © 2022 Elsevier B.V. All rights reserved.)- Published
- 2022
- Full Text
- View/download PDF
26. Identifying novel putative ERK1/2 inhibitors via hybrid scaffold hopping -FBDD approach.
- Author
-
Pathania S, Singh PK, Narang RK, and Rawal RK
- Subjects
- Ligands, Molecular Docking Simulation, Molecular Dynamics Simulation, MAP Kinase Signaling System, Protein Kinase Inhibitors chemistry, Protein Kinase Inhibitors pharmacology
- Abstract
ERK inhibitors are continuously explored by the researchers due to their clinical significance in resistant tumor cell lines. Though many ERK1/2 inhibitors are reported, there is still need to identify novel hits to increase the number of molecules in clinical trials. Therefore, an urgent need is to examine the existing chemical space for ERK inhibitory potential with an aim to develop novel scaffolds which can act as potent ERKs inhibitors. In this study, Ulixertinib, a known ERK2 inhibitor was selected to perform scaffold hopping to discover new scaffolds with similar binding mode followed by molecular docking analysis of the hits with highest similarity score to determine, both the binding mode and affinity in the catalytic domain of ERK2. The top hit was then subjected to FBDD to identify side chains which could enhance the binding affinity in the catalytic domain of ERK2. Again, docking analysis was performed to validate and determine their binding affinity. Further the top hit identified after docking analysis was subjected to molecular dynamic simulations. Overall, 3 hits (ligand 6, 8 and 10 ) were found to possess optimum pharmacodynamic and pharmacokinetic profile, in-silico , to be claimed as putative ERK2 inhibitors. This study disclosed new lead molecules with putative ERK2 inhibitory potential which may be further validated via biological evaluation.
- Published
- 2022
- Full Text
- View/download PDF
27. Corrigendum to "Collagen-based formulations for wound healing: A literature review" [Life Sci., 2022; 290: 120096].
- Author
-
Sharma S, Rai VK, Narang RK, and Markandeywar TS
- Published
- 2022
- Full Text
- View/download PDF
28. Collagen-based formulations for wound healing: A literature review.
- Author
-
Sharma S, Rai VK, Narang RK, and Markandeywar TS
- Subjects
- Animals, Collagen chemistry, Collagen metabolism, Humans, Skin drug effects, Skin metabolism, Tissue Engineering methods, Tissue Engineering trends, Tissue Scaffolds chemistry, Collagen pharmacology, Wound Healing drug effects, Wound Healing physiology
- Abstract
Wounds have always been the point of concern owing to the involvement of infections and the level of severity. Therefore, the management of wounds always requires additional effort for comprehensive healing and subsequent removal of the scar from the wound site. The role of biomaterials in the management of chronic wounds has been well established. One of such biomaterials is collagen (Col) that is considered to be the crucial component of most of the formulations being developed for wound healing. The role of Col extracted from marine invertebrates remains an unmarked origin of the proteinaceous constituent in the evolution of innovative pharmaceuticals. Col is a promising, immiscible, fibrous amino acid of indigenous origin that is ubiquitously present in extracellular matrices and connective tissues. There are different types of Col present in the body such as type I, II, III, IV, and V however the natural sources of Col are vegetables and marine animals. Its physical properties like high tensile strength, adherence nature, elasticity, and remodeling contribute significantly in the wound healing process. Col containing formulations such as hydrogels, sponges, creams, peptides, and composite nanofibers have been utilized widely in wound healing and tissue engineering purposes truly as the first line of defense. Here we present the recent advancements in Col based dosage forms for wound healing. The Col based market of topical preparations and the published reports identify Colas a useful biomaterial for the delivery of pharmaceuticals and a platform for tissue engineering., (Copyright © 2021 Elsevier Inc. All rights reserved.)
- Published
- 2022
- Full Text
- View/download PDF
29. IL-23/Th17 Axis: A Potential Therapeutic Target of Psoriasis.
- Author
-
Sharma A, Upadhyay DK, Gupta GD, Narang RK, and Rai VK
- Subjects
- Cytokines metabolism, Cytokines therapeutic use, Humans, Interleukin-23 metabolism, Tumor Necrosis Factor-alpha metabolism, Tumor Necrosis Factor-alpha therapeutic use, Psoriasis drug therapy, Th17 Cells metabolism, Th17 Cells pathology
- Abstract
Psoriasis is an immune-mediated skin disease that leads to the initiation of abnormal production of inflammatory mediators and keratinocytes hyper-proliferation. Th-1 cell expressing cytokines such as IL-1β and TNF-α have been the important hallmarks in the management of psoriasis. However, investigations carried out in the previous few years underline the involvement of another subset of T helper cells, i.e. Th-17 in psoriasis exacerbation, and hence have become the point of focus now. The immunopathogenesis of Th-17 is the result of the IL-23/Th-17 axis. It involves the release of IL-17 and IL-22 in response to the activated NF-kβ dependent activation of IL-23. The function of human Th-17 cells, as well as the crucial role of IL-23/Th-17 axis in the exacerbation of psoriasis and treatment, have been well explored. Therefore, considering IL-23/Th17 axis as a pertinent therapeutic target in immune driven disorders, extensive investigations are now highlighting the utility of biopharmaceuticals and/or biological agents acting on these targets. Here, we review the IL-23/Th-17 axis based therapeutic targets, different types of active moieties based on their source of availability and most useful USFDA approved Mabs targeting the IL-23/Th17 axis in psoriasis for a better understanding of the future possibilities in this area., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
- Published
- 2022
- Full Text
- View/download PDF
30. Development and In Vivo Evaluation of Pectin Based Enteric Coated Microparticles Loaded with Mesalamine and Saccharomyces boulardii for Management of Ulcerative Colitis.
- Author
-
Singh A, Mandal UK, and Narang RK
- Subjects
- Animals, Caco-2 Cells, Humans, Mesalamine pharmacology, Mesalamine therapeutic use, Pectins adverse effects, Rats, Rats, Wistar, Colitis, Ulcerative chemically induced, Colitis, Ulcerative drug therapy, Saccharomyces boulardii
- Abstract
Mesalamine is the first-line choice of drug for ulcerative colitis management. However, due to the nontargeted delivery of mesalamine, it shows side effects. The possible impact of mesalamine can be improved by coated microparticles in combination with S. boulardii for targeted delivery to the colon with the prevention of unwanted side effects. In this work, pectin-based mesalamine and S. boulardii loaded microparticles were prepared by dehydration technique and coated by an oil-in-oil solvent evaporation method and characterized by Scanning electron microscopy (SEM), X-ray diffraction, and zeta analysis. 2, 4, 6-Trinitrobenzenesulfonic acid was used for the induction of colitis. The anti-inflammatory effects of coated microparticles on Caco-2 cells were assessed by the determination of interleukin (IL)-8 concentration. In addition, the impact of coated microparticles on the concentration of colonic enzymes, including myeloperoxidase (MPO), lipid peroxides, and glutathione (GSH), were also evaluated. Moreover, hematological parameters, including white blood cell (WBC), erythrocyte sedimentation rate (ESR), and C-reactive protein (CRP), were assessed. SEM data revealed that all the prepared coated microparticles had an almost spherical shape. The X-ray powder diffraction analysis of uncoated and coated microparticles showed maximum stability without any interaction. The particle size of uncoated and coated microparticles was 9.14 and 15.61 μm, respectively. The zeta potential of uncoated and coated microparticles was observed to be -26.78 and -29.36 mV, respectively. The prepared coated microparticles decreased the levels of lipid peroxides, MPO, and GSH significantly in colitis. In the Caco-2 cell culture model, the concentration of IL-8 is decreased significantly. The hematological observations confirmed that the prepared formulation showed a promising decrease in the levels of WBC, CRP, and ESR in diseased animals. Animal experiments revealed that cellulose acetate phthalate coated microparticles of mesalamine and S. boulardii significantly improved the colitis disease conditions of Wistar rats. Hence, cellulose acetate phthalate-coated microparticles of mesalamine and S. boulardii could be recommended as adjuvant therapy to achieve a synergistic effect in the management of UC. Lay summary Mesalamine is the drug of choice for the management of ulcerative colitis (UC), which inhibits mediators responsible for inflammation. We investigated the in vivo effects of cellulose acetate phthalate-coated microparticles of mesalamine with Saccharomyces boulardii (probiotic) for their efficacy against UC. Our findings evidenced that the combination of mesalamine with S. boulardii showed a synergistic effect in the 2,4,6- trinitrobenzene sulfonic acid-induced colitis model by reducing the inflammation and maintains the macroscopic features. From the observed results, it can be concluded that S. boulardii can be used to enhance the individual drug's effect in the therapeutic management of UC.
- Published
- 2022
- Full Text
- View/download PDF
31. Structure based designing of thiazolidinone-pyrimidine derivatives as ERK2 inhibitors: Synthesis and in vitro evaluation.
- Author
-
Pathania S, Singh PK, Narang RK, and Rawal RK
- Subjects
- Antineoplastic Agents chemistry, Drug Design, Humans, MCF-7 Cells, Molecular Dynamics Simulation, Protein Kinase Inhibitors chemistry, Protein Kinase Inhibitors pharmacology, Pyrimidines chemical synthesis, Pyrimidines chemistry, Quantitative Structure-Activity Relationship, Thiazolidines chemical synthesis, Thiazolidines chemistry, Antineoplastic Agents pharmacology, Mitogen-Activated Protein Kinase 1 antagonists & inhibitors, Pyrimidines pharmacology, Thiazolidines pharmacology
- Abstract
Breast cancer has been associated with an overexpression of various molecular targets; accordingly, various target-specific chemotherapeutic agents have been developed. Inhibition of ERK2, a member of MAPK pathway, is an important target involved in the treatment of both oestrogen receptor-positive and triple-negative breast cancer. Thus, in continuation of our previous work on the ERK2 target, we here report novel inhibitors of this kinase. Out of three lead molecules reported in our previous study, we selected the thiazolidinone-pyrimidine scaffold for further development of small molecule inhibitors of ERK2. Analogues of the lead molecule were docked in the target kinase, followed by molecular dynamic simulations and MM-GBSA calculations. Analogues maintaining key interactions with amino acid residues in the ATP-binding domain of ERK2 were selected and duly synthesized. In vitro biochemical evaluation of these molecules against ERK2 kinase disclosed that two molecules possess significant kinase inhibitory potential with IC
50 values ≤ 0.5 µM.- Published
- 2021
- Full Text
- View/download PDF
32. Assessing the Relationship Between Serum Urate and Urolithiasis Using Mendelian Randomization: An Analysis of the UK Biobank.
- Author
-
Narang RK, Gamble GG, Topless R, Cadzow M, Stamp LK, Merriman TR, and Dalbeth N
- Subjects
- Adult, Aged, Causality, Female, Humans, Hyperuricemia epidemiology, Male, Mendelian Randomization Analysis, Middle Aged, Odds Ratio, United Kingdom, Urolithiasis epidemiology, Hyperuricemia genetics, Uric Acid blood, Urolithiasis genetics
- Abstract
Rationale & Objective: The association between hyperuricemia and urolithiasis has been previously reported. However, this association is based on observational data, which are prone to residual confounding. The aim of this work was to use Mendelian randomization (MR) to evaluate if this relationship represents a causal effect of hyperuricemia., Study Design: MR analysis using 2 approaches: 2-stage MR and 2-sample MR., Setting & Participants: Participants aged 40-69 years from the UK Biobank Resource., Exposure: Serum urate., Outcome: Urolithiasis., Analytical Approach: An observational analysis testing for an association between serum urate level and urolithiasis was performed using logistic regression. For MR analyses, serum urate-associated single-nucleotide polymorphisms, identified from genome-wide association data, were used as instrumental variables for serum urate. In the 2-stage MR analysis, a weighted genetic urate score was calculated from the instrumental variables, and a control function estimation model was fit. In the 2-sample MR analysis, multiple-instrument MR via the inverse-variance weighted method was performed., Results: Individual-level data were available for 359,827 participants, of whom 6,398 (1.8%) reported urolithiasis. In the observational analysis, serum urate was positively associated with urolithiasis in an unadjusted analysis (odds ratio [OR], 1.47 [95% CI, 1.42-1.51]); however, after adjustment for relevant confounders, no association was observed (OR, 1.03 [95% CI, 0.99-1.08]). In the 2-stage MR analysis, no significant causal effect of serum urate level on urolithiasis was observed in the unadjusted (OR, 0.93 [95% CI, 0.81-1.08]) or adjusted (OR, 0.94 [95% CI, 0.80-1.09]) models. In the 2-sample MR analysis, multiple-instrument MR did not indicate a causal effect of serum urate on urolithiasis., Limitations: Stone composition and urinalysis data, including urine pH, were not available for this study., Conclusions: Our analyses do not support a causal effect of serum urate level on urolithiasis. The association between serum urate level and urolithiasis reported in observational studies is likely due to residual confounding., (Copyright © 2021 National Kidney Foundation, Inc. Published by Elsevier Inc. All rights reserved.)
- Published
- 2021
- Full Text
- View/download PDF
33. Development and Characterization of a Clobetasol Propionate Nanostructured Lipid Carrier-Based Gel for the Treatment of Plaque Psoriasis.
- Author
-
Dadwal A, Mishra N, and Narang RK
- Subjects
- Clobetasol therapeutic use, Drug Carriers, Humans, Lipids therapeutic use, Nanostructures, Psoriasis drug therapy
- Abstract
Background: Psoriasis is an autoimmune disease of the skin with lapsing episodes of hyperkeratosis, irritation, and inflammation. Numerous traditional and novel drug delivery systems have been used for better penetration through psoriatic barrier cells and also for retention in the skin. As there is no effective remedy for better penetration, and retention is there because of the absence of an ideal carrier for effective and safe delivery of antipsoriatic drugs., Objectives: The main objective of this project is to develop a Squalene integrated NLC based carbopol 940 gel to create a local drug depot in the skin for improved efficacy against psoriasis., Methods: Homogenization method is used for the formulation of Nanostructured Lipid Carrier, which was characterized on the basis of size, entrapment efficiency, polydispersity index (PDI), viscosity, spreadability, DSC, zeta potential, % in vitro release, in vitro skin permeation and retention studies, physical storage stability studies. In vivo studies can use other alternative models for induction of psoriasis by severe redness, swelling macroscopically, and microvascular dilation edema lasting for 10 days. Furthermore, histopathology study was done to asses changes in the skin., Conclusion: The optimized formulation of nanostructured lipid carrier-based gel has shown significant and sustained release of clobetasol propionate. Furthermore, this formulation has also shown retention in skin because of squalene as it is a sebum derived lipid, which shows an affinity towards the sebaceous gland., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
- Published
- 2021
- Full Text
- View/download PDF
34. Recent Nanocarrier Approaches for Targeted Drug Delivery in Cancer Therapy.
- Author
-
Bhatia R, Sharma A, Narang RK, and Rawal RK
- Subjects
- Drug Carriers, Drug Delivery Systems, Gold therapeutic use, Humans, Antineoplastic Agents therapeutic use, Metal Nanoparticles, Nanotubes, Carbon, Neoplasms drug therapy, Neoplasms pathology
- Abstract
Cancer is one of the most serious health concerns in the 21st century whose prevalence is beyond boundaries and can affect any organ of the human body. The conventional chemotherapeutic treatment strategies lack specificity to tumors and are associated with toxic effects on the immune system and other organ systems. In the past decades, there has been continuous progress in the development of smart nanocarrier systems for target-specific delivery of drugs against a variety of tumors, including intracellular gene-specific targeting. These nanocarriers are able to recognize the tumor cells and deliver the therapeutic agent in fixed proportions, causing no or very less harm to healthy cells. Nanosystems have modified physicochemical properties, improved bioavailability, and long retention in blood, which enhances their potency. A huge number of nanocarrier based formulations have been developed and are in clinical trials. Nanocarrier systems include polymeric micelles, liposomes, dendrimers, carbon nanotubes, gold nanoparticles, etc. Recent advancements in nanocarrier systems include mesoporous silica nanoparticles (MSNs), metal organic frameworks, and quantum dots. In the present review, various nanocarrier based drug delivery systems, along with their applications in the management of cancer, have been described with special emphasis on MSNs., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
- Published
- 2021
- Full Text
- View/download PDF
35. Pathophysiology of Gout.
- Author
-
Narang RK and Dalbeth N
- Subjects
- Cytokines, Humans, Uric Acid, Gout, Hyperuricemia
- Abstract
Multiple interacting checkpoints are involved in the pathophysiology of gout. Hyperuricemia is the key risk factor for gout and is considered a prerequisite for monosodium urate (MSU) crystal formation. Urate underexcretion through renal and gut mechanisms is the major mechanism for hyperuricemia in most people. Multiple genetic, environmental, and metabolic factors are associated with serum urate and alter urate transport or synthesis. Urate supersaturation is the most important factor for MSU crystal formation, and other factors such as temperature, pH, and connective tissue components also play a role. The nucleotide-binding oligomerization domain leucine-rich repeats and pyrin domain-containing protein 3 inflammasome plays a pivotal role in the inflammatory response to MSU crystals, and interleukin 1β is the key cytokine mediating the inflammatory cascade. Variations in the regulatory mechanisms of this inflammatory response may affect an individual's susceptibility to developing gout. Tophus formation is the cardinal feature of advanced gout, and both MSU crystals and the inflammatory tissue component of the tophus contribute to the development of structural joint damage owing to gout. In this article, we review the pathophysiologic mechanisms of hyperuricemia, MSU crystal formation and the associated inflammatory response, tophus formation, and structural joint damage in gout., (Copyright © 2020 Elsevier Inc. All rights reserved.)
- Published
- 2020
- Full Text
- View/download PDF
36. Do Serum Urate-associated Genetic Variants Influence Gout Risk in People Taking Diuretics? Analysis of the UK Biobank.
- Author
-
Narang RK, Gamble G, Phipps-Green AJ, Topless R, Cadzow M, Stamp LK, Merriman TR, and Dalbeth N
- Subjects
- Biological Specimen Banks, Humans, United Kingdom, Diuretics adverse effects, Gout chemically induced, Gout epidemiology, Uric Acid blood
- Abstract
Objective: The aim of this study was to determine whether serum urate (SU)-associated genetic variants differ in their influence on gout risk in people taking a diuretic compared to those not taking a diuretic., Methods: This research was conducted using the UK Biobank Resource (n = 359,876). Ten SU-associated single-nucleotide polymorphisms (SNP) were tested for their association with gout according to diuretic use. Gene-diuretic interactions for gout association were tested using a genetic risk score (GRS) and individual SNP by logistic regression adjusting for relevant confounders., Results: After adjustment, use of a loop diuretic was positively associated with prevalent gout (OR 2.34, 95% CI 2.08-2.63), but thiazide diuretics were inversely associated with prevalent gout (OR 0.60, 95% CI 0.55-0.66). Compared with a lower GRS (< mean), a higher GRS (≥ mean) was positively associated with gout in those not taking diuretics (OR 2.63, 2.49-2.79), in those taking loop diuretics (OR 2.04, 95% CI 1.65-2.53), in those taking thiazide diuretics (OR 2.70, 2.26-3.23), and in those taking thiazide-like diuretics (OR 2.11, 95% CI 1.37-3.25). No nonadditive gene-diuretic interactions were observed., Conclusion: In people taking diuretics, SU-associated genetic variants contribute strongly to gout risk, with a similar effect to that observed in those not taking a diuretic. These findings suggest that the contribution of genetic variants is not restricted to people with "primary" gout, and that genetic variants can play an important role in gout susceptibility in the presence of other risk factors.
- Published
- 2020
- Full Text
- View/download PDF
37. A prediction tool for vitamin D deficiency in New Zealand adults.
- Author
-
Narang RK, Gamble GG, Khaw KT, Camargo CA Jr, Sluyter JD, Scragg RKR, and Reid IR
- Subjects
- Adult, Aged, Aged, 80 and over, Cohort Studies, Exercise, Female, Humans, Middle Aged, New Zealand epidemiology, Vitamin D, Vitamin D Deficiency diagnosis, Vitamin D Deficiency epidemiology
- Abstract
Purpose: This study aims to develop a model for predicting vitamin D deficiency in New Zealand adults using easily accessible clinical characteristics., Methods: Data were derived from the Vitamin D Assessment (ViDA) study dataset. Included participants in the main analysis were aged 50-84 years and resided in Auckland, New Zealand. The dataset was split into a discovery dataset in which the prediction model was developed (n = 2036) and a validation dataset in which it was tested (n = 2037). The prediction model was developed using clinical characteristics in a logistic regression analysis with deseasonalised serum 25OHD (DS-25OHD) as the dependent variable., Results: DS-25OHD < 40 nmol/L was found in 8.2% of European participants, 18.8% of Māori participants, 23.1% of Pacific participants and 52.2% of South Asian participants. Predictors for DS-25OHD < 40 nmol/L in the European sub-cohort included increasing age, female sex, higher body mass index, current smoking, no alcohol intake, lower self-reported general health status, lower physical activity hours, lower outdoor hours and no use of vitamin D-containing supplementation. The area under the curve in the discovery dataset was 0.73, and in the validation dataset was 0.71. Of those with a prediction score ≥ 10 (total risk score range 0-21.5), the sensitivity and specificity for predicting vitamin D deficiency was 0.90 and 0.41, respectively., Conclusion: Non-European ethnicity is an important risk factor for vitamin D deficiency. Our vitamin D deficiency prediction model performed well and demonstrates its potential as a tool that can be integrated into clinical practice for the prediction of vitamin D deficiency.
- Published
- 2020
- Full Text
- View/download PDF
38. Systematic genetic analysis of early-onset gout: ABCG2 is the only associated locus.
- Author
-
Zaidi F, Narang RK, Phipps-Green A, Gamble GG, Tausche AK, So A, Riches P, Andres M, Perez-Ruiz F, Doherty M, Janssen M, Joosten LAB, Jansen TL, Kurreeman F, Torres RJ, McCarthy GM, Miner JN, Stamp LK, Merriman TR, and Dalbeth N
- Subjects
- Adult, Age of Onset, Europe epidemiology, Female, Genetic Predisposition to Disease, Humans, Male, Polymorphism, Single Nucleotide, Symptom Flare Up, ATP Binding Cassette Transporter, Subfamily G, Member 2 genetics, Gout blood, Gout epidemiology, Gout genetics, Neoplasm Proteins genetics, Uric Acid blood
- Abstract
Objective: The aim of this study was to examine whether serum urate-associated genetic variants are associated with early-onset gout., Methods: Participants with gout in the Genetics of Gout in Aotearoa study with available genotyping were included (n = 1648). Early-onset gout was defined as the first presentation of gout <40 years of age. Single nucleotide polymorphisms (SNPs) for the 10 loci most strongly associated with serum urate were genotyped. Allelic association of the SNPs with early-onset gout was tested using logistic regression in an unadjusted model and in a model adjusted for sex, body mass index, tophus presence, flare frequency, serum creatinine and highest serum urate. The analysis was also done in two replication cohorts: Eurogout (n = 704) and Ardea (n = 755), and data were meta-analysed., Results: In the Genetics of Gout in Aotearoa study, there were 638 (42.4%) participants with early-onset gout. The ABCG2 rs2231142 gout risk T-allele was present more frequently in participants with early-onset gout compared with the later-onset group. For the other SNPs tested, no differences in risk allele number were observed. In the allelic association analysis, the ABCG2 rs2231142 T-allele was associated with early-onset gout in unadjusted and adjusted models. Analysis of the replication cohorts confirmed the association of early-onset gout with the ABCG2 rs2231142 T-allele, but not with other serum urate-associated SNPs. In the meta-analysis, the odds ratio (95% CI) for early-onset gout for the ABCG2 rs2231142 T-allele was 1.60 (1.41, 1.83)., Conclusion: In contrast to other serum urate-raising variants, the ABCG2 rs2231142 T-allele is strongly associated with early-onset gout., (© The Author(s) 2020. Published by Oxford University Press on behalf of the British Society for Rheumatology. All rights reserved. For permissions, please email: journals.permissions@oup.com.)
- Published
- 2020
- Full Text
- View/download PDF
39. Development and characterisation of clobetasol propionate loaded Squarticles as a lipid nanocarrier for treatment of plaque psoriasis.
- Author
-
Dadwal A, Mishra N, Rawal RK, and Narang RK
- Subjects
- Administration, Cutaneous, Animals, Disease Models, Animal, Female, Gels, Lipids chemistry, Male, Microscopy, Electron, Scanning, Particle Size, Rats, Rats, Wistar, Rheology, Sebaceous Glands drug effects, Skin Absorption, Temperature, Clobetasol administration & dosage, Drug Carriers chemistry, Drug Liberation, Nanoparticles chemistry, Psoriasis drug therapy, Skin drug effects
- Abstract
Aim: The aim of this project is to improve the therapeutic effectiveness, permeation and retention of clobetasol propionate in sebaceous glands by reporting the use of Squarticles as lipidic nanosystem. Methods: Homogenisation method is used for the formulation of Squarticles (nanoemulgel) which was characterised on the basis of size, polydispersity index (PDI), viscosity, spreadability, DSC, % in vitro release, in vitro skin permeation deposition studies, and in vivo studies, scanning electron microscopic (SEM) and physical storage stability studies were done at different temperature conditions, i.e. 4 ± 2 °C, 25 ± 2 °C and 45 ± 2 °C for a period of 6 months for drug and formulation. Result: The morphological characterisation of prepared nanoemulsion shows small spherical shape and uniform size distribution as observed in the Scanning electron microscopic (SEM), having mean size (240.5 ± 9.2) and mean size distribution (0.282 ± 0.03) and zeta potential (-51.21). The drug release from optimised nanoemulsion (F2) in PBS (pH 5.5) was approximately 84.24 ± 1.35%, nanoemulgel formulations showed the release of 66.83 ± 2.05% while marketed gel showed the release of 57.67 ± 1.63% after 24 h. The cumulative percentage retention of clobetasol propionate loaded nanoemulgel was 63 ± 1.28% which was more than the marketed formulation (23.12% ±0.54). Physical stability studies show that formulation is more stable in cold condition. Further, the stability of active ingredient in gel formulation was determined using HPLC which shows around 15 ± 0.84% of loss in its activity. Conclusion: The present work has demonstrated the use of Squarticles as a novel carrier for treatment of plaque psoriasis by enhancing the better permeation, increasing skin retention, and enhances the effect of drug. The study also shows that the formulation is more stable in cold condition.
- Published
- 2020
- Full Text
- View/download PDF
40. Do Serum Urate-Associated Genetic Variants Differentially Contribute to Gout Risk According to Body Mass Index? Analysis of the UK Biobank.
- Author
-
Tai V, Narang RK, Gamble G, Cadzow M, Stamp LK, Merriman TR, and Dalbeth N
- Subjects
- Aged, Body Mass Index, Female, Genetic Predisposition to Disease, Gout epidemiology, Humans, Hyperuricemia blood, Hyperuricemia epidemiology, Logistic Models, Male, Middle Aged, Odds Ratio, Overweight epidemiology, Polymorphism, Single Nucleotide, Prevalence, Risk, United Kingdom epidemiology, Uric Acid blood, White People genetics, Gout genetics, Hyperuricemia genetics, Obesity epidemiology
- Abstract
Objective: To examine whether urate-associated genetic variants differ in their influence on gout risk according to body mass index (BMI)., Methods: This research was conducted using the UK Biobank Resource (n = 358,728). Participants were divided into 3 groups: BMI <25 kg/m
2 (low/normal), BMI ≥25 kg/m2 -<30 kg/m2 (overweight), and BMI ≥30 kg/m2 (obese). Gene-BMI interactions for gout association were tested by logistic regression using a urate genetic risk score (GRS)., Results: Compared to participants with a GRS less than the mean, the prevalence of gout was higher in those with a GRS greater than or equal to the mean in the low/normal BMI group (0.27% versus 0.77%), in the overweight BMI group (1.02% versus 3.02%), and in the obese BMI group (2.49% versus 6.23%). A GRS greater than or equal to the mean was positively associated with gout compared to a GRS less than the mean in the low/normal BMI group (odds ratio [OR] 2.89 [95% confidence interval (95% CI) 2.42-3.47]), in the overweight BMI group (OR 3.09 [95% CI 2.84-3.36]), and in the obese BMI group (OR 2.65 [95% CI 2.46-2.86]). There was a mildly attenuated effect of the GRS on gout risk in the obese BMI group compared to the overweight BMI group, but no difference in the effect of the GRS between the low/normal BMI and overweight BMI groups, nor between the low/normal BMI and obese BMI groups., Conclusion: The association of a urate GRS with gout is mildly attenuated in obese individuals compared to overweight individuals. However, genetic variants have a strong effect on gout risk in those with overweight and obese BMIs, with an effect similar to that observed in low/normal BMI., (© 2020, American College of Rheumatology.)- Published
- 2020
- Full Text
- View/download PDF
41. FbD Supported Development and In Vitro Evaluation of Carbomer based Resveratrol Loaded Topical Antipsoriatic Nanoemulgel for its Targeted Skin Delivery.
- Author
-
Khurana B, Arora D, and Narang RK
- Subjects
- Animals, Emulsions, Models, Biological, Nanoparticles, Psoriasis drug therapy, Resveratrol chemistry, Skin Absorption, Swine, Vitamin E chemistry, Acrylic Resins chemistry, Drug Compounding methods, Resveratrol pharmacokinetics, Skin chemistry
- Abstract
Background: Resveratrol is a wonder therapy for the treatment of several skin disorders, including psoriasis, but its skin permeation limits its applications., Objective: The present work dealt with optimizing and formulating resveratrol loaded vitamin E based nanoemulsion and carbomer based nanoemulgel intended for topical application in the treatment of plaque psoriasis. The major objective of this study was to achieve the quality target product profile with respect to enhanced skin permeation and superior skin deposition of the formulated nanoemulgel to achieve the superlative therapeutic advantages., Methods: Formulation by design (FbD) approach was employed to optimize varied critical material attributes such as the concentration of oil and Smix to achieve the desired quality characteristics. Carbomer based nanoemulgel was formulated and evaluated., Results: Optimized formulation was having globule size (168.3 ± 4.98 nm), percentage cumulative permeation (4.81 ± 0.65%), permeation flux (7.62 ± 0.39 μg hr-1cm-2), and skin deposition (668.65 ± 11.98 μg cm-2). Nanoemulgel was found to have optimum physical properties in terms of viscosity, spreadability, pH and physical stability. The extent of skin deposition was approximately 6.682 times higher while the permeation enhancement ratio was around 2.872 as compared to conventional formulation indicating its higher skin targeting abilities, which was further ratified by Confocal Laser Scanning Microscopy results., Conclusion: Nanoemulgel formulated by the current FbD approach has enhanced skin permeation and skin deposition properties as compared to conventional carbomer gel. Thus, it could augment the therapeutic benefits of encapsulated bioactive in the treatment of several skin disorders like psoriasis., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
- Published
- 2020
- Full Text
- View/download PDF
42. Population-specific factors associated with fractional excretion of uric acid.
- Author
-
Narang RK, Vincent Z, Phipps-Green A, Stamp LK, Merriman TR, and Dalbeth N
- Subjects
- Adult, Aged, Female, Gout ethnology, Gout genetics, Gout urine, Humans, Hyperuricemia urine, Male, Middle Aged, New Zealand ethnology, Polymorphism, Single Nucleotide genetics, Polynesia ethnology, Population Surveillance methods, Hyperuricemia ethnology, Hyperuricemia genetics, Native Hawaiian or Other Pacific Islander ethnology, Native Hawaiian or Other Pacific Islander genetics, Uric Acid urine, White People ethnology, White People genetics
- Abstract
Background: Reduced renal clearance of uric acid is a major contributor to hyperuricemia. The aim of this study was to examine clinical and genetic variables associated with fractional excretion of uric acid (FEUA)., Methods: Participants (with and without gout) in the Genetics of Gout in Aotearoa study with available genotyping and FEUA data were included (n = 1713). Ten FEUA-associated loci detected within a genome-wide association study for serum urate in a European population were analysed. A polygenic score for FEUA was calculated in each ancestry group to model the cumulative effects of the genetic variants on FEUA. Associations between FEUA and both clinical variables and polygenic score were tested using linear regression models., Results: The mean (SD) FEUA was 5.13 (2.70) % in Eastern Polynesian participants, 4.70 (5.89) % in Western Polynesian participants, and 5.89 (2.73) % in New Zealand European participants. Although association with FEUA was observed for SLC2A9 rs11942223 in New Zealand European participants (P = 2.39 × 10
- 8 ), this association was not observed in Eastern or Western Polynesian participants. The polygenic score was positively associated with FEUA in all ancestry groups. In New Zealand European participants, body mass index, diuretic use, polygenic score, and male sex were associated with FEUA and explained 22% of FEUA variance in the regression model. In Eastern and Western Polynesian participants, the tested variables explained 10% and 4% of FEUA variance respectively., Conclusions: Both clinical and genetic variables contribute to renal clearance of uric acid. SLC2A9 exerts effects on FEUA variance in people of European ancestry, but not in those of Polynesian ancestry. There is a large unexplained variance in FEUA, particularly in people of Polynesian ancestry.- Published
- 2019
- Full Text
- View/download PDF
43. Role of sulphur-heterocycles in medicinal chemistry: An update.
- Author
-
Pathania S, Narang RK, and Rawal RK
- Subjects
- Animals, Anti-Infective Agents chemical synthesis, Anti-Infective Agents chemistry, Anti-Infective Agents pharmacology, Anti-Inflammatory Agents chemical synthesis, Anti-Inflammatory Agents chemistry, Anti-Inflammatory Agents pharmacology, Antihypertensive Agents chemical synthesis, Antihypertensive Agents chemistry, Antihypertensive Agents pharmacology, Antineoplastic Agents chemical synthesis, Antineoplastic Agents chemistry, Antineoplastic Agents pharmacology, Chemistry, Pharmaceutical, Heterocyclic Compounds chemical synthesis, Heterocyclic Compounds chemistry, Humans, Hypoglycemic Agents chemical synthesis, Hypoglycemic Agents chemistry, Hypoglycemic Agents pharmacology, Sulfur chemistry, Heterocyclic Compounds pharmacology, Sulfur pharmacology
- Abstract
From many decades, S-heterocycles have maintained their status as an important part and core of FDA approved drugs and medicinally active compounds. With exhaustive exploration of nitrogen heterocycles in medicinal chemistry, researchers have shifted their interest towards other heterocycles, especially, S-heterocycles. Thus several attempts have been made to synthesize a variety of new sulphur containing compounds with high medicinal value and low toxicity profile, in comparison to previous N-heterocycles. Till today, S-heterocycle containing compounds have been largely reported as anticancer, antidiabetic, antimicrobial, antihypertension, antivral, antinflammatory etc. In this review, the authors have tried to provide a critical analysis of synthesis and medicinal attributes of sulphur containing heterocycles such as thiirane, thiophene, thiazole, thiopyran, thiazolidine etc reported within last five years to emphasize the significance and usefulness of these S-heterocycles in the drug discovery process., (Copyright © 2019 Elsevier Masson SAS. All rights reserved.)
- Published
- 2019
- Full Text
- View/download PDF
44. Osteomalacia in subtropical Auckland.
- Author
-
Narang RK and Reid I
- Subjects
- Aged, Bone Density drug effects, Bone Density Conservation Agents administration & dosage, Bone Density Conservation Agents therapeutic use, Calcifediol administration & dosage, Calcifediol therapeutic use, Femur Neck pathology, Fractures, Stress diagnostic imaging, Fractures, Stress etiology, Humans, Magnetic Resonance Imaging, Male, Osteomalacia blood, Osteomalacia drug therapy, Osteomalacia etiology, Treatment Outcome, Vitamin D blood, Vitamin D Deficiency complications, Femur Neck diagnostic imaging, Osteomalacia diagnosis, Vitamin D analogs & derivatives
- Abstract
A 56-year-old man was referred with left-sided hip pain. MRI scans demonstrated an undisplaced stress fracture in the femoral neck and subchondral oedema within the femoral head. Bone densitometry showed T-scores of -2.0 at the spine, -3.5 at the femoral neck and -2.4 for the total hip. Laboratory tests revealed 25-hydroxyvitamin D <10 nmol/L. He was prescribed a 10-day course of calciferol 1.25 mg (50 000 IU)/day and started on calcium carbonate 1.25 g twice daily. Following the correction of vitamin D deficiency, his symptoms resolved. A striking feature of this patient was the complete reversal of 'osteoporosis' within 14 months with vitamin D and calcium supplementation. Bone mineral densities (BMDs) increased by 19.5% and 33.4% at the spine and hip, respectively. Such changes are never seen with conventional pharmacological management of osteoporosis. Vitamin D deficiency should be considered as a cause for reduced BMD in people with risk factors., Competing Interests: Competing interests: None declared., (© BMJ Publishing Group Limited 2019. No commercial re-use. See rights and permissions. Published by BMJ.)
- Published
- 2019
- Full Text
- View/download PDF
45. Interactions between serum urate-associated genetic variants and sex on gout risk: analysis of the UK Biobank.
- Author
-
Narang RK, Topless R, Cadzow M, Gamble G, Stamp LK, Merriman TR, and Dalbeth N
- Subjects
- Adult, Aged, Female, Gout epidemiology, Humans, Male, Middle Aged, Polymorphism, Single Nucleotide genetics, Risk Factors, United Kingdom epidemiology, Biological Specimen Banks trends, Genetic Variation genetics, Gout blood, Gout genetics, Sex Characteristics, Uric Acid blood
- Abstract
Background: Sex-specific differences in the effect of genetic variants on serum urate levels have been described. The aim of this study was to systematically examine whether serum urate-associated genetic variants differ in their influence on gout risk in men and women., Methods: This research was conducted using the UK Biobank Resource. Thirty single nucleotide polymorphisms (SNPs) associated with serum urate were tested for their association with gout in men and women of European ancestry, aged 40-69 years. Gene-sex interactions for gout risk were analysed using an interaction analysis in logistic regression models., Results: Gout was present in 6768 (4.1%) men and 574 (0.3%) women, with an odds ratio (95% confidence interval) for men 13.42 (12.32-14.62) compared with women. In men, experiment-wide association with gout was observed for 21 of the 30 serum urate-associated SNPs tested, and in women for three of the 30 SNPs. Evidence for gene-sex interaction was observed for ABCG2 (rs2231142) and PDZK1 (rs1471633), with the interaction in ABCG2 driven by an amplified effect in men and in PDZK1 by an absence of effect in women. Similar findings were observed in a sensitivity analysis which excluded pre-menopausal women. For the other SNPs tested, no significant gene-sex interactions were observed., Conclusions: In a large population of European ancestry, ABCG2 and PDZK1 gene-sex interactions exist for gout risk, with the serum urate-raising alleles exerting a greater influence on gout risk in men than in women. In contrast, other serum urate-associated genetic variants do not demonstrate significant gene-sex interactions for gout risk.
- Published
- 2019
- Full Text
- View/download PDF
46. Management of complex gout in clinical practice: Update on therapeutic approaches.
- Author
-
Narang RK and Dalbeth N
- Subjects
- Febuxostat, Gout pathology, Gout Suppressants pharmacology, Humans, Gout drug therapy, Gout Suppressants therapeutic use
- Abstract
Increasing therapeutic options are available for gout management. Anti-inflammatory agents are used in the acute management of gout flares, and interleukin-1 inhibitors are effective for those unable to take conventional anti-inflammatory treatments. Lowering of serum urate remains the cornerstone of effective long-term management. Allopurinol is the first-line urate-lowering therapy, and a gradual dose-escalation strategy to serum urate target is recommended. Febuxostat and lesinurad have been approved more recently. In a large cardiovascular outcomes trial, higher all-cause and cardiovascular mortality was observed with febuxostat than with allopurinol. Lesinurad should be co-prescribed with a xanthine oxidase inhibitor, and close monitoring of kidney function is required. Evidence for non-pharmacological management is limited, but personalised lifestyle modification may reduce associated cardiovascular risk. In this review, we discuss current principles in the gout management paradigm, consider strategies for managing complex, clinical scenarios, and review emerging therapies., (Copyright © 2019 Elsevier Ltd. All rights reserved.)
- Published
- 2018
- Full Text
- View/download PDF
47. Novel Topical Nanocarriers for Treatment of Psoriasis: An Overview.
- Author
-
Dadwal A, Mishra N, and Narang RK
- Subjects
- Animals, Antipsychotic Agents administration & dosage, Antipsychotic Agents chemistry, Drug Carriers administration & dosage, Drug Carriers chemistry, Drug Delivery Systems, Humans, Molecular Structure, Nanoparticles administration & dosage, Antipsychotic Agents therapeutic use, Nanoparticles chemistry, Psoriasis drug therapy
- Abstract
Background: Psoriasis is an autoimmune disease of the skin with lapsing episodes of hyperkeratosis, irritation and inflammation. Numerous methodologies and utilization of different antipsoriatic drugs with various activity methods and routes of administration have been investigated to treat this terrifying sickness. In any case, till date, there is no remedy for psoriasis because of the absence of an ideal carrier for effective and safe delivery of antipsoriatic drugs., Objective: Among the different methods of medications for psoriasis, in the greater part of patients, topical treatment is most commonly utilized. For topical formulations, utilization of conventional excipients could fill the need just to a restricted degree. With the revelation of more up to date biocompatible and biodegradable materials like phospholipids, and Novel drug delivery technologies like liposomes, solid lipid nanoparticles (SLNs), microemulsions, and nanoemulsions, the possibility to enhance the efficiency and safety of the topical products has expanded to a great extent. Understanding the topical delivery aspects and that of outlining and creating different carrier systems have been enhanced that got further novelty to this approach., Conclusion: Present review is an attempt to contemplate on psoriasis as far as improved comprehension of the dermal delivery perspectives and at present accessible treatment alternatives, significant preventions in psoriasis treatment, late advancements in the conveyance of different antipsoriatic drugs through novel colloidal drug transporters., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
- Published
- 2018
- Full Text
- View/download PDF
48. A review of emerging trends in the treatment of tuberculosis.
- Author
-
Kaur M, Garg T, and Narang RK
- Subjects
- Antitubercular Agents chemistry, Antitubercular Agents therapeutic use, Humans, Liposomes, Microspheres, Nanoparticles, Tuberculosis drug therapy, Tuberculosis epidemiology, Tuberculosis transmission, Tuberculosis therapy
- Abstract
This review attempts to summarize the information available on emerging trends in the treatment of tuberculosis caused by the bacteria Mycobacterium tuberculosis. Nanostructured biomaterials, liposomes, microparticles and solid lipid nanoparticles have unique physicochemical properties such as particularly small and convenient size, sustained release, great surface area to mass ratio and high reactivity with structure. These properties can be useful in easing the administration of antimicrobial drugs, thereby reducing the number of limitations in long-established antimicrobial therapeutics. In recent years, the encapsulation of antimicrobial drugs in all carrier systems has emerged as an innovative and promising change that increases therapeutic efficiency and reduces undesirable side effects of the drugs.
- Published
- 2016
- Full Text
- View/download PDF
49. Development and characterization of ligand-appended liposomes for multiple drug therapy for pulmonary tuberculosis.
- Author
-
Bhardwaj A, Kumar L, Narang RK, and Murthy RS
- Subjects
- Animals, Antitubercular Agents administration & dosage, Antitubercular Agents chemical synthesis, Antitubercular Agents pharmacokinetics, Drug Therapy, Combination, Humans, Isoniazid administration & dosage, Isoniazid chemical synthesis, Isoniazid pharmacokinetics, Ligands, Pyrazinamide administration & dosage, Pyrazinamide chemical synthesis, Pyrazinamide pharmacokinetics, Rats, Rats, Inbred Strains, Rifampin administration & dosage, Rifampin chemical synthesis, Rifampin pharmacokinetics, Drug Delivery Systems methods, Liposomes chemical synthesis, Mycobacterium tuberculosis drug effects, Tuberculosis, Pulmonary drug therapy
- Abstract
Tuberculosis (TB) remains one of the oldest and deadliest diseases in the current scenario. The intracellular organism Mycobacterium tuberculosis, which mainly resides in mononuclear phagocytes, is responsible for tuberculosis in humans. A few therapies are available for the treatment of tuberculosis but they have many hurdles. To overcome these hurdles, a combination of chemotherapeutic agent-loaded vesicular systems have been prepared to overcome tuberculosis. To investigate the role of novel drug delivery systems for the treatment of pulmonary tuberculosis, ligand appended liposomals have been developed. In the present study, drug-loaded, ligand-appended liposomes and their DPI (Dry Powder Inhaler) forms have been prepared and characterized using various in vitro and in vivo parameters. The prepared ligand-appended liposomal formulation showed good entrapment efficiency, prolonged drug release, improved recovery of drugs from the target site, and proved to be more suitable for use as DPI, justifying their potential for improved drug delivery. Thus we tried our best by our project to reduce the national burden of tuberculosis, which is still a global health challenge.
- Published
- 2013
- Full Text
- View/download PDF
50. Advances in pulmonary delivery of nanoparticles.
- Author
-
Kaur G, Narang RK, Rath G, and Goyal AK
- Subjects
- Animals, Biological Availability, Cell Line, Drug Delivery Systems instrumentation, Humans, Nanotechnology instrumentation, Nanotechnology legislation & jurisprudence, Drug Delivery Systems methods, Lung metabolism, Nanoparticles chemistry, Nanoparticles toxicity, Nanotechnology methods
- Abstract
Nanotechnology has potential in the development of novel and effective delivery of drugs within lungs. Different strategies have been utilized for pulmonary delivery of drugs, including the use of lipid-based delivery systems (liposomes, ISCOMs, SLNs), use of polymeric matrix (PLGA, poly caprolactone, cynoacrylates, gelatin), development of polysaccharide particulates (chitosan, alginates, Carbopol, etc.), biocompatible metallic inorganic particles (iron, gold, zinc), etc. This paper reviews various nanopaticulate approaches in the form of lipids, polymers, metals, polysaccharides, or emulsions based for pulmonary drug delivery that could provide an increased biological efficacy and better local and systemic action.
- Published
- 2012
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.