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Author: search.filters.author.Singhvi, GautamSubject: search.filters.subject.Psoriasis

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    Apremilast loaded lyotropic liquid crystalline nanoparticles embedded hydrogel for improved permeation and skin retention: An effective approach for psoriasis treatment
    (Elsevier, 2023-06) Singhvi, Gautam; Roy, Aniruddha
    The present work aimed to prepare and evaluate Apremilast loaded lyotropic liquid crystalline nanoparticles (LCNPs) formulation for skin delivery to enhance the efficacy with reduced adverse effects of the oral therapy in psoriasis treatment. The LCNPs were prepared using the emulsification using a high shear homogenizer for size reduction and optimized with Box Behnken design to achieve desired particle size and entrapment efficiency. The selected LCNPs formulation was evaluated for in-vitro release, in-vitro psoriasis efficacy, skin retention, dermatokinetic, in-vivo skin retention, and skin irritation study. The selected formulation exhibited 173.25 ± 2.192 nm (polydispersity 0.273 ± 0.008) particle size and 75.028 ± 0.235% entrapment efficiency. The in-vitro drug release showed the prolonged-release for 18 h. The ex-vivo studies revealed that LCNPs formulation exhibited drug retention up to 3.2 and 11.9-fold higher, in stratum corneum and viable epidermis compared to conventional gel preparation. In-vitro cell line studies performed on immortal keratinocyte cells (HaCaT cells) demonstrated non-toxicity of selected excipients used in designed LCNPs. The dermatokinetic study revealed the AUC0–24 of the LCNPs loaded gel was 8.4 fold higher in epidermis and 2.06 fold in dermis, respectively compared to plain gel. Further, in-vivo animal studies showed enhanced skin permeation and retention of Apremilast compared to conventional gel.
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    Nanocarriers for topical delivery in psoriasis
    (Elsevier, 2020) Singhvi, Gautam
    Psoriasis is a chronic autoimmune skin disorder that affects millions of people across the planet. It causes many serious complications to afflicted patients and is indicated by uncontrolled growth and differentiation of keratinocytes. Conventional dosage forms have been used for the topical delivery of antipsoriatic drugs but they possess their own limitations. These include poor patient compliance, inadequate penetration and targeting to diseased skin, and local toxicity. In recent decades nanocarriers like liposomes, micelles, and solid lipid nanoparticles have shown potential in delivering antipsoriatic active compounds to the targeted areas of skin. Such novel formulations improve therapeutic efficacy, increase localization of drug in the skin, and decrease side effects. This chapter sheds light on the current advancements in the field of nanocarriers in treating the psoriatic skin condition.
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    Emerging landscape in psoriasis management: From topical application to targeting biomolecules
    (Elsevier, 2018-10) Singhvi, Gautam
    Psoriasis is a chronic autoimmune skin disorder affecting 2–3% of the world population. It has characteristic features such as increased keratinocyte proliferation and production of inflammatory mediators. The treatment involves various strategies including topical, systemic, phototherapy and biologics. Topical therapies are preferred for mild to moderate psoriasis conditions over the systemic therapies which are ideal in severe disease conditions. The systemic therapies include immunosuppressants, biological agents and recently approved phosphodiesterase-4 (PDE4) inhibitors. There are various limitations associated with the existing therapies where the new findings in the pathogenesis of psoriasis are paving a path for newer therapeutics to target at the molecular level. Various small molecules, PDE-4 inhibitors, biologics, and immunomodulator proved efficacious including the new molecules targeting Janus kinases (JAK) inhibitors that are under investigation. Furthermore, the role of genetic and miRNAs in psoriasis is still not completely explored and may further help in improving the treatment efficacy. This review provides an insight into various emerging therapies along with currently approved treatments for psoriasis.
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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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    Potential herbal constituents for psoriasis treatment as protective and effective therapy
    (Wiley, 2020-12) Singhvi, Gautam
    Psoriasis is a multifactorial and chronic skin disorder. It is a recurrent disease that requires incessant therapy. Psoriasis treatment includes topical and systemic routes using synthetic drugs that lead to severe unwanted adverse effects. Herbal therapy is widely used for thousands of years in countries like China and India. The use of herbal therapy in the developed region enhanced to a great extent and showed better efficacy towards psoriasis alone or as adjuvant to synthetic therapy. Herbal medicines have gained great attention in the treatment of psoriasis due to their lesser side effects compared to synthetic drugs. In this review, the various plant sources which have been found effective in psoriasis and can be used to develop novel therapeutics have been discussed. The mechanisms by which the phytoconstituents elicit anti-psoriatic activity and various research studies that have proven the effectiveness of these natural products have also been compiled in this review.
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    Insight into the pivotal role of signaling pathways in psoriasis pathogenesis, potential therapeutic molecules and drug delivery approaches
    (Elsevier, 2023-02) Singhvi, Gautam
    Psoriasis is a multifactorial chronic autoimmune skin disorder, the exact cause of which is still under investigation. It is classified into different types displaying various histopathological features such as hyperproliferation, irregular parakeratosis and vascular infiltration of various immune cells with neutrophils in the epidermis. Over the past few decades, psoriasis pathogenesis has been thoroughly researched, leading to several advances in the treatment using small molecules and biologics. This review focuses on describing the role of various signaling pathways, including PDE-4, JAK-STAT, S1P, A3AR and NF-κB, in psoriasis pathogenesis and associated new molecules that are either recently approved or under clinical trials. This study has also addressed the relevance of employing nanotherapeutics to boost the efficacy of psoriasis treatment.