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Graphic Abstract Vaccines are designed to leverage the immune system and produce long-lasting protection against specific diseases. Peptide vaccines are regarded as safe and effective way of circumventing problems such as mild allergic reactions associated with conventional vaccines. The biggest challenges associated with formulation of peptide vaccines are stability issues and conformational changes which lead to destruction of their activity when exposed to lyophilization process that may act as stressors. Lyophilization process is aimed at removal of water which involves freezing, primary drying and secondary drying. To safeguard the peptide molecules from such stresses, cryoprotectants are used to offer them viability and structural stability. This paper is an attempt to understand the physicochemical properties of peptide vaccines, mechanism of cryoprotection under the shed of water replacement, water substitution theory and cation-pi interaction theory of amino acids which aims at shielding the peptide from external environment by formation of hydrogen bonds, covalent bonds or cation-pi interaction between cryoprotectant and peptide followed by selection criteria of cryoprotectants and their utility in peptide vaccines development along with challenges and opportunities.

This work investigates the synergistic potential of the nanostructured lipid carrier (NLC) gel of Ibrutinib with Curcumin as a repurposing strategy to treat psoriasis. In the present work, various components such as liquid lipid, solid lipid, and surfactant were selected and optimized based on the solubility of each drug, size, and polydispersity index. The optimized NLC consists of Capryol PGMC as liquid lipid, Glyceryl Mono Stearate as solid lipid, and Pluronics-F-127 as a surfactant. The prepared NLCs have a particle size of 95.12 ± 3.39 nm with PDI of 0.285 ± 0.009, exhibiting high entrapment efficiency (86.04 ± 2.86% for IBR and 87.25 ± 2.14% for CUR) with spherical geometry. CI value of 0.283 suggests synergism. Carbopol 940 was used as a gelling agent and has shown improved flux compared to plain drug gel. Anti-psoriatic studies in BALB/c mice indicated negligible skin irritation and improved histopathological features of psoriasis. Moreover, a reduced amount of inflammatory markers (TNF-alpha, IL-6, IL-22, and IL-23), and psoriasis severity score was observed with prepared gel than the IMQ group. The study suggested integrated benefits of repurposing Ibrutinib with Curcumin as NLC topical gel and it could possibly reduce remission of Psoriasis like inflammation and merit additional investigation.

Psoriasis is a chronic inflammatory autoimmune condition manifested by the hyperproliferation of keratinocytes with buildup of inflammatory red patches and scales on skin surfaces. The available treatment options for the management of psoriasis have various drawbacks, and the clinical need for effective therapeutics for this disease remain unmet; therefore, the approaches of drug repurposing or drug repositioning could potentially be used for treating indications of psoriasis. The undiscovered potential of drug repurposing or repositioning compensates for the limitations and hurdles in drug discovery and drug development processes. Drugs initially approved for other indications, including anticancer, antidiabetic, antihypertensive, and anti-arthritic activities, are being investigated for their potential in psoriasis management as a new therapeutic indication by using repurposing strategies. This article envisages the potential of various therapeutics for the management of psoriasis., Graphical abstract Image 1, Highlights • Psoriasis is an autoimmune inflammatory skin disorder with complex physiology. • Conventional treatments for psoriasis cause severe adverse effects; therefore an unmet need remains for safer and more effective therapies for psoriasis. • Various drugs that effectively decrease the inflammation and proliferation of skin cells can be repurposed for the management of psoriasis. • Repurposed drugs provide various incentives to the pharmaceutical industry.