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      Engineered Nanoscale Lipid-Based Formulation as Potential Enhancer of Gefitinib Lymphatic Delivery: Cytotoxicity and Apoptotic Studies Against the A549 Cell Line

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          Abstract

          The present study aimed to engineer a nanoscale lipid-based lymphatic drug delivery system with D-α-Tocopherol polyethylene glycol 1000 succinate to combat the lymphatic metastasis of lung cancer. The nanoscale lipid-based systems including GEF-SLN, GEF-NLC, and GEF-LE were prepared and pharmaceutically characterized. In addition, the most stable formulation (GEF-NLC) was subjected to an in vitro release study. Afterward, the optimized GEF-NLC was engineered with TPGS (GEF-TPGS-NLC) and subjected to in vitro cytotoxicity, and apoptotic studies using the A549 cells line as a surrogate model for lung cancer. The present results revealed that particle size and polydispersity index of freshly prepared formulations were ranging from 198 to 280 nm and 0.106 to 0.240, respectively, with negative zeta potential ranging from − 14 to − 27.6.mV. An in vitro release study showed that sustained drug release was attained from GEF-NLC containing a high concentration of lipid. In addition, GEF-NLC and GEF-TPGS-NLC showed remarkable entrapment efficiency above 89% and exhibited sustained release profiles. Cytotoxicity showed that IC 50 of pure GEF was 11.15 μg/ml which decreased to 7.05 μg/ml for GEF-TPGS-NLC. The apoptotic study revealed that GEF-TPGS-NLC significantly decreased the number of living cells from 67 to 58% when compared with pure GEF. The present results revealed that the nanoscale and lipid composition of the fabricated SLN, NLC, and LE could mediate the lymphatic uptake of GEF to combat the lymphatic tumor metastasis. Particularly, GEF-TPGS-NLC is a promising LDDS to increase the therapeutic outcomes of GEF during the treatment of metastatic lung cancer.

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          Engineering precision nanoparticles for drug delivery

          In recent years, the development of nanoparticles has expanded into a broad range of clinical applications. Nanoparticles have been developed to overcome the limitations of free therapeutics and navigate biological barriers — systemic, microenvironmental and cellular — that are heterogeneous across patient populations and diseases. Overcoming this patient heterogeneity has also been accomplished through precision therapeutics, in which personalized interventions have enhanced therapeutic efficacy. However, nanoparticle development continues to focus on optimizing delivery platforms with a one-size-fits-all solution. As lipid-based, polymeric and inorganic nanoparticles are engineered in increasingly specified ways, they can begin to be optimized for drug delivery in a more personalized manner, entering the era of precision medicine. In this Review, we discuss advanced nanoparticle designs utilized in both non-personalized and precision applications that could be applied to improve precision therapies. We focus on advances in nanoparticle design that overcome heterogeneous barriers to delivery, arguing that intelligent nanoparticle design can improve efficacy in general delivery applications while enabling tailored designs for precision applications, thereby ultimately improving patient outcome overall.
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            Coadministration of Paclitaxel and curcumin in nanoemulsion formulations to overcome multidrug resistance in tumor cells.

            Development of multidrug resistance (MDR) against a variety of conventional and novel chemotherapeutic agents is a significant challenge in effective cancer therapy. Over the last several years, we have focused on a multimodal therapeutic strategy to overcome tumor MDR by enhancing the delivery efficiency to the tumor mass and lowering the apoptotic threshold by modulation of the intracellular signaling mechanisms. In this study, we have examined augmentation of therapeutic efficacy upon coadministration of paclitaxel (PTX) and curcumin (CUR), an inhibitor of nuclear factor kappa B (NFkappaB) as well as a potent down-regulator of ABC transporters, in wild-type SKOV3 and drug resistant SKOV3(TR) human ovarian adenocarcinoma cells. PTX and CUR were encapsulated in flaxseed oil containing nanoemulsion formulations. The results showed that the encapsulated drugs were effectively delivered intracellular in both SKOV3 and SKOV3(TR) cells. CUR administration was shown to inhibit NFkappaB activity and down regulate P-glycoprotein expression in resistant cells. Combination PTX and CUR therapy, especially when administered in the nanoemulsion formulations, was very effective in enhancing the cytotoxicity in wild-type and resistant cells by promoting the apoptotic response. Overall, this cotherapy strategy has significant promise in the clinical management of refractory diseases, especially in ovarian cancer.
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              Stealth liposomes and long circulating nanoparticles: critical issues in pharmacokinetics, opsonization and protein-binding properties.

              This article critically examines and evaluates the likely mechanisms that contribute to prolonged circulation times of sterically protected nanoparticles and liposomes. It is generally assumed that the macrophage-resistant property of sterically protected particles is due to suppression in surface opsonization and protein adsorption. However, recent evidence shows that sterically stabilized particles are prone to opsonization particularly by the opsonic components of the complement system. We have evaluated these phenomena and discussed theories that reconcile complement activation and opsonization with prolonged circulation times. With respect to particle longevity, the physiological state of macrophages also plays a critical role. For example, stimulated or newly recruited macrophages can recognize and rapidly internalize sterically protected nanoparticles by opsonic-independent mechanisms. These concepts are also examined.
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                Author and article information

                Contributors
                ashreef@ksu.edu.sa
                Journal
                AAPS PharmSciTech
                AAPS PharmSciTech
                AAPS PharmSciTech
                Springer International Publishing (Cham )
                1530-9932
                1 July 2022
                August 2022
                : 23
                : 6
                : 183
                Affiliations
                [1 ]GRID grid.56302.32, ISNI 0000 0004 1773 5396, Kayyali Chair for Pharmaceutical Industry, College of Pharmacy, , King Saud University, ; Riyadh, Saudi Arabia
                [2 ]GRID grid.56302.32, ISNI 0000 0004 1773 5396, Department of Pharmaceutics, College of Pharmacy, , King Saud University, ; Riyadh, Saudi Arabia
                [3 ]GRID grid.411303.4, ISNI 0000 0001 2155 6022, Department of Biochemistry and Molecular Biology, College of Pharmacy, , Al-Azhar University, ; Nasr City, Cairo Egypt
                [4 ]GRID grid.56302.32, ISNI 0000 0004 1773 5396, Department of Pharmacognosy, College of Pharmacy, , King Saud University, ; Riyadh, Saudi Arabia
                Article
                2332
                10.1208/s12249-022-02332-7
                9247939
                35773422
                4b53e4b8-d816-489c-9551-1bd72afe7620
                © The Author(s), under exclusive licence to American Association of Pharmaceutical Scientists 2022

                This article is made available via the PMC Open Access Subset for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the World Health Organization (WHO) declaration of COVID-19 as a global pandemic.

                History
                : 23 April 2022
                : 14 June 2022
                Categories
                Research Article
                Custom metadata
                © The Author(s), under exclusive licence to American Association of Pharmaceutical Scientists 2022

                Pharmacology & Pharmaceutical medicine
                ldd,gefitinib,nlc,tpgs,lung cancer,cytotoxicity
                Pharmacology & Pharmaceutical medicine
                ldd, gefitinib, nlc, tpgs, lung cancer, cytotoxicity

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