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      Multilayer engineered nanoliposomes as a novel tool for oral delivery of lipopeptide-based vaccines against group A Streptococcus

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          Abstract

          To develop an oral nanovaccine delivery system for lipopeptide-based vaccine candidate against group A Streptococcus.

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          Most cited references38

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          Materials engineering for immunomodulation.

          The engineering of materials that can modulate the immune system is an emerging field that is developing alongside immunology. For therapeutic ends such as vaccine development, materials are now being engineered to deliver antigens through specific intracellular pathways, allowing better control of the way in which antigens are presented to one of the key types of immune cell, T cells. Materials are also being designed as adjuvants, to mimic specific 'danger' signals in order to manipulate the resultant cytokine environment, which influences how antigens are interpreted by T cells. In addition to offering the potential for medical advances, immunomodulatory materials can form well-defined model systems, helping to provide new insight into basic immunobiology.
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            Position statement of the World Heart Federation on the prevention and control of rheumatic heart disease.

            In the 21(st) century, rheumatic fever (RF) and rheumatic heart disease (RHD) are neglected diseases of marginalized communities. Globally, RHD remains the most-common cardiovascular disease in young people aged <25 years. Although RF and RHD have been almost eradicated in areas with established economies, migration from low-income to high-income settings might be responsible for a new burden of RHD in high-income countries. The World Heart Federation (WHF) and its Working Group on RF and RHD unites global experts, combines their experience and enthusiasm, and provides a platform for RHD control. This paper is a declaration of the WHF institutional strategic goal--a 25% reduction in premature deaths from RF and RHD among individuals aged <25 years by the year 2025. The position statement affirms WHF commitments to five key strategic targets: comprehensive register-based control programmes, global access to benzathine penicillin G, identification and development of public figures as 'RHD champions', expansion of RHD training hubs, and support for vaccine development. In this paper, we also review existing barriers to RF and RHD control and identify the actions required to change the trajectory of control for these diseases. This approach provides the foundation for governments, civil society, patient advocates, clinicians, researchers, and funding agencies to develop partnerships and unify global efforts to control RF and RHD. The WHF plans to expand this position statement to an operational plan that will be founded on science, research, and quantifiable progress indicators to impact positively on the millions of people who are affected by RHD and its long-term sequelae.
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              Layer-by-layer assembly of liposomal nanoparticles with PEGylated polyelectrolytes enhances systemic delivery of multiple anticancer drugs.

              Layer-by-layer (LbL)-engineered nanoparticles (NPs) are a promising group of therapeutic carriers used in an increasing number of biomedical applications. The present study uses a controlled LbL process to create a multidrug-loaded nanoplatform capable of promoting blood circulation time, biodistribution profile and controlling drug release in the dynamic systemic environment. LbL assembly is achieved by sequential deposition of poly-l-lysine (PLL) and poly(ethylene glycol)-block-poly(l-aspartic acid) (PEG-b-PLD) on liposomal nanoparticles (LbL-LNPs). This generates spherical and stable multilayered NPs ∼240nm in size, enabling effective systemic administration. The numerous functional groups and compartments in the polyelectrolyte shell and core facilitate loading with doxorubicin and mitoxantrone. The nanoarchitecture effectively controls burst release, providing different release kinetics for each drug. LbL-LNPs are pH-sensitive, indicating that intracellular drug release can be increased by the acidic milieu of cancer cells. We further demonstrate that the LbL nanoarchitecture significantly reduces the elimination rates of both drugs tested and markedly extends their systemic circulation times, paving the way for efficacious tumor drug delivery. Because this delivery system accommodates multiple drugs, improves drug half-life and diminishes burst release, it provides an exciting platform with remarkable potential for combination therapeutics in cancer therapy.
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                Author and article information

                Journal
                Nanomedicine
                Nanomedicine
                Future Medicine Ltd
                1743-5889
                1748-6963
                May 2016
                May 2016
                : 11
                : 10
                : 1223-1236
                Article
                10.2217/nnm.16.36
                27077314
                40b33002-b707-4e7f-9562-a2139149497d
                © 2016
                History

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