Department of Pharmacy

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Author: search.filters.author.Singhvi, GautamSubject: search.filters.subject.Drug Delivery

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Now showing 1 - 8 of 8
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    Liposomal Drug Delivery
    (Bentham Science, 2022-12) Singhvi, Gautam
    Liposomes are emerging as uni or multilamellar micro particulate phospholipid bilayer sphere vesicles, which can be produced synthetically and have the ability to encapsulate any kind of drug molecule. Either hydrophilic or lipophilic drug substances can be easily entrapped in these vesicles for efficient delivery of a drug. Over the past decades, these have been under investigation to develop novel and revolutionary drug delivery aspects in the pharmaceutical field. Liposomes are based on a simple mechanism of formation of the enclosed sphere formed when amphiphilic lipid comes in contact with the aqueous layer. The advancements in liposomes have paved pathways towards efficient drug delivery through alteration in the bioavailability and bio-distribution of drugs. Classified into various types, liposomes can be prepared using various techniques involving mechanical dispersion, solvent dispersion, and detergent removal methods. The development of these liposomes has profound the advanced delivery characterization. This helps deliver the molecules at the target site, and the number of liposomal products in clinical use has now increased. Recent advances are incorporating the emergence of second-generation liposomes over conventional liposomes, which will help modulate the encapsulation efficiency and drug release from liposomes. This literature briefly focusses on various aspects of liposomes, which further relates to the growing advances and interest in this field.
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    Xanthan gum in drug delivery applications
    (Elsevier, 2019-07) Singhvi, Gautam
    Natural Polysaccharides in Drug Delivery and Biomedical Applications provides a fundamental overview of natural polysaccharides, their sources, extraction methodologies, and characterizations. It covers specific natural polysaccharides and their effective application in drug delivery and biomedical use. Additionally, chapters in the book discuss key topics including the sources and extraction methodologies of natural polysaccharides, their role in tissue engineering applications, polysaccharide-based nanoparticles in biomedical applications, and their role in the delivery of anticancer drugs. Written by industry leaders and edited by experts, this book emphasizes recent advances made in the field.Natural Polysaccharides in Drug Delivery and Biomedical Applications provides academics, researchers, and pharmaceutical health care professionals with a comprehensive book on polysaccharides in pharmaceutical delivery process
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    Nanocarriers For Drug Delivery: Mini Review
    (Bentham Science, 2018) Singhvi, Gautam
    Nanocarriers have been a part of drug delivery for some decades now. Due to the enormous advantages offered by them, they are replacing the conventionally available systems.
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    Microneedles: A smart approach and increasing potential for transdermal drug delivery system
    (Elsevier, 2019-01) Pandey, Murali Monohar; Singhvi, Gautam
    The most widely used methods for transdermal administration of the drugs are hypodermic needles, topical creams, and transdermal patches. The effect of most of the therapeutic agents is limited due to the stratum corneum layer of the skin, which serves as a barrier for the molecules and thus only a few molecules are able to reach the site of action. A new form of delivery system called the microneedles helps to enhance the delivery of the drug through this route and overcoming the various problems associated with the conventional formulations. The primary principle involves disruption of the skin layer, thus creating micron size pathways that lead the drug directly to the epidermis or upper dermis region from where the drug can directly go into the systemic circulation without facing the barrier. This review describes the various potential and applications of the microneedles. The various types of microneedles can be fabricated like solid, dissolving, hydrogel, coated and hollow microneedles. Fabrication method selected depends on the type and material of the microneedle. This system has increased its application to many fields like oligonucleotide delivery, vaccine delivery, insulin delivery, and even in cosmetics. In recent years, many microneedle products are coming into the market. Although a lot of research needs to be done to overcome the various challenges before the microneedles can successfully launch into the market.
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    Microsponge: an emerging drug delivery strategy. Drug development research
    (Wiley, 2018-11) Singhvi, Gautam
    Microsponges are the spherical particles ranging from 5 to 300 μm in size. These are further made up of clusters of smaller spheres. They are designed for delivering the drug efficiently at a comparatively lesser dose and enhancing the stability, modifying the drug release profile and minimizing the side effects. Microsponge drug delivery system decrease transdermal invasion of the active ingredient into the skin while increasing the time the drug remains on the skin surface or within the epidermis. Preparation of the microsponges includes two techniques: Liquid–liquid suspension polymerization and Quasi-emulsion solvent diffusion method. Their characterization and evaluation can be done in many ways like particle-size measurement and porosity, morphology, true density determination, analyzing the rheological properties, and dissolution studies. Present work focuses on the detailed study of the microsponge drug delivery system. This will help the reader to get all the information regarding the microsponge delivery systems.
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    Nanocarriers for ocular drug delivery: current status and translational opportunity
    (RSC, 2020) Singhvi, Gautam
    Ocular diseases have a significant effect on vision and quality of life. Drug delivery to ocular tissues is a challenge to formulation scientists. The major barriers to delivering drugs to the anterior and posterior segments include physiological barriers (nasolacrimal drainage, blinking), anatomical barriers (static and dynamic), efflux pumps and metabolic barriers. The static barriers comprise the different layers of the cornea, sclera, and blood–aqueous barriers whereas dynamic barriers involve conjunctival blood flow, lymphatic clearance and tear drainage. The tight junctions of the blood–retinal barrier (BRB) restrict systemically administered drugs from entering the retina. Nanocarriers have been found to be effective at overcoming the issues associated with conventional ophthalmic dosage forms. Various nanocarriers, including nanodispersion systems, nanomicelles, lipidic nanocarriers, polymeric nanoparticles, liposomes, niosomes, and dendrimers, have been investigated for improved permeation and effective targeted drug delivery to various ophthalmic sites. In this review, various nanomedicines and their application for ophthalmic delivery of therapeutics are discussed. Additionally, scale-up and clinical status are also addressed to understand the current scenario for ophthalmic drug delivery.
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    Psoriasis: pathological mechanisms, current pharmacological therapies, and emerging drug delivery systems
    (Elsevier, 2020-12) Singhvi, Gautam
    Psoriasis is a chronic autoimmune skin disorder triggered by either genetic factors, environmental factors, life style, or a combination thereof. Clinical investigations have identified pathogenesis, such as T cell and cytokine-mediated, genetic disposition, antimicrobial peptides, lipocalin-2, galectin-3, vaspin, fractalkine, and human neutrophil peptides in the progression of psoriasis. In addition to traditional therapies, newer therapeutics, including phosphodiesterase type 4 (PDE4) inhibitors, Janus kinase (JAK) inhibitors, monoclonal antibodies (mAbs), gene therapy, anti-T cell therapy, and phytoconstituents have been explored. In this review, we highlight nanotechnology-related developments for psoriasis treatment, including patented delivery systems and therapeutics currently in clinical trials.
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    Surface Modification of Lipid-Based Nanocarriers: A Potential Approach to Enhance Targeted Drug Delivery
    (ACS, 2022-12) Singhvi, Gautam
    Nanocarriers have the utmost significance for advancements in drug delivery and nanomedicine technology. They are classified as polymer-based nanocarriers, lipid-based nanocarriers, viral nanoparticles, or inorganic nanoparticles, depending on their constituent parts. Lipid-based nanocarrier systems have gained tremendous attention over the years because of their noteworthy properties like high drug-loading capacity, lower toxicity, better bioavailability and biocompatibility, stability in the gastrointestinal tract, controlled release, simpler scale-up, and validation process. Nanocarriers still have some disadvantages like poor drug penetration, limited drug encapsulation, and poor targeting. These disadvantages can be overcome by their surface modification. Surface-modified nanocarriers result in controlled release, enhanced penetration efficiency, and targeted medication delivery. In this review, the authors summarize the numerous lipid-based nanocarriers and their functionalization through various surface modifiers such as polymers, ligands, surfactants, and fatty acids. Recent examples of newly developing surface-modified lipid-based nanocarrier systems from the available literature, along with their applications, have been compiled in this work.