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      A biomimetic platelet based on assembling peptides initiates artificial coagulation

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          Abstract

          A biomimetic platelet based on assembling peptides initiates artificial coagulation for tumor therapy.

          Abstract

          Platelets play a critical role in the regulation of coagulation, one of the essential processes in life, attracting great attention. However, mimicking platelets for in vivo artificial coagulation is still a great challenge due to the complexity of the process. Here, we design platelet-like nanoparticles (pNPs) based on self-assembled peptides that initiate coagulation and form clots in blood vessels. The pNPs first bind specifically to a membrane glycoprotein (i.e., CD105) overexpressed on angiogenetic endothelial cells in the tumor site and simultaneously transform into activated platelet-like nanofibers (apNFs) through ligand-receptor interactions. Next, the apNFs expose more binding sites and recruit and activate additional pNPs, forming artificial clots in both phantom and animal models. The pNPs are proven to be safe in mice without systemic coagulation. The self-assembling peptides mimic platelets and achieve artificial coagulation in vivo, thus providing a promising therapeutic strategy for tumors.

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          Most cited references33

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          How to study proteins by circular dichroism.

          Circular dichroism (CD) is being increasingly recognised as a valuable technique for examining the structure of proteins in solution. However, the value of many studies using CD is compromised either by inappropriate experimental design or by lack of attention to key aspects of instrument calibration or sample characterisation. In this article, we summarise the basis of the CD approach and its application to the study of proteins, and then present clear guidelines on how reliable data can be obtained and analysed.
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            Discovery and development of sorafenib: a multikinase inhibitor for treating cancer.

            Since the molecular revolution of the 1980s, knowledge of the aetiology of cancer has increased considerably, which has led to the discovery and development of targeted therapies tailored to inhibit cancer-specific pathways. The introduction and refinement of rapid, high-throughput screening technologies over the past decade has greatly facilitated this targeted discovery and development process. Here, we describe the discovery and continuing development of sorafenib (previously known as BAY 43-9006), the first oral multikinase inhibitor that targets Raf and affects tumour signalling and the tumour vasculature. The discovery cycle of sorafenib (Nexavar; Bayer Pharmaceuticals) - from initial screening for a lead compound to FDA approval for the treatment of advanced renal cell carcinoma in December 2005 - was completed in just 11 years, with approval being received approximately 5 years after the initiation of the first Phase I trial.
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              Platelet biology and functions: new concepts and clinical perspectives

              Platelets - blood cells continuously produced from megakaryocytes mainly in the bone marrow - are implicated not only in haemostasis and arterial thrombosis, but also in other physiological and pathophysiological processes. This Review describes current evidence for the heterogeneity in platelet structure, age, and activation properties, with consequences for a diversity of platelet functions. Signalling processes of platelet populations involved in thrombus formation with ongoing coagulation are well understood. Genetic approaches have provided information on multiple genes related to normal haemostasis, such as those encoding receptors and signalling or secretory proteins, that determine platelet count and/or responsiveness. As highly responsive and secretory cells, platelets can alter the environment through the release of growth factors, chemokines, coagulant factors, RNA species, and extracellular vesicles. Conversely, platelets will also adapt to their environment. In disease states, platelets can be positively primed to reach a pre-activated condition. At the inflamed vessel wall, platelets interact with leukocytes and the coagulation system, interactions mediating thromboinflammation. With current antiplatelet therapies invariably causing bleeding as an undesired adverse effect, novel therapies can be more beneficial if directed against specific platelet responses, populations, interactions, or priming conditions. On the basis of these novel concepts and processes, we discuss several initiatives to target platelets therapeutically.
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                Author and article information

                Journal
                Sci Adv
                Sci Adv
                SciAdv
                advances
                Science Advances
                American Association for the Advancement of Science
                2375-2548
                May 2020
                27 May 2020
                : 6
                : 22
                : eaaz4107
                Affiliations
                [1 ]CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST) No. 11 Beiyitiao, Zhongguancun, Beijing 100190, P. R. China.
                [2 ]Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China.
                [3 ]Key Laboratory of Functional Small Organic Molecule, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China.
                [4 ]State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Functional Polymer Materials of Ministry of Education College of Chemistry, Nankai University, Tianjin 300071, P. R. China.
                [5 ]Key Laboratory of Biomedical Polymers of Ministry of Education & Department of Chemistry, Wuhan University, Wuhan, P. R. China.
                [6 ]Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
                Author notes
                [*]

                These authors contributed equally to this work.

                []Corresponding author. Email: wanghao@ 123456nanoctr.cn (H.W.); wanglei@ 123456nanoctr.cn (L.W.)
                Author information
                http://orcid.org/0000-0002-3896-0758
                http://orcid.org/0000-0003-3687-3172
                http://orcid.org/0000-0002-6557-0982
                http://orcid.org/0000-0001-8917-7600
                http://orcid.org/0000-0002-0643-9319
                http://orcid.org/0000-0002-1704-0602
                http://orcid.org/0000-0002-7567-8663
                http://orcid.org/0000-0002-4588-8977
                http://orcid.org/0000-0003-3272-5092
                http://orcid.org/0000-0002-1413-7601
                http://orcid.org/0000-0001-8004-3673
                http://orcid.org/0000-0002-9534-795X
                http://orcid.org/0000-0001-6242-6005
                http://orcid.org/0000-0003-1405-9815
                http://orcid.org/0000-0002-1961-0787
                Article
                aaz4107
                10.1126/sciadv.aaz4107
                7385434
                614e93a4-9280-4563-a3b2-60c92beaf714
                Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

                This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.

                History
                : 09 September 2019
                : 18 March 2020
                Funding
                Funded by: doi http://dx.doi.org/10.13039/501100001809, National Natural Science Foundation of China;
                Funded by: doi http://dx.doi.org/10.13039/501100001809, National Natural Science Foundation of China;
                Funded by: CAS Key Research Program for Frontier Sciences;
                Funded by: Key Project of the Chinese Academy of Sciences in Cooperation with Foreign Enterprises;
                Funded by: Jilin Province Key Laboratory of Organic Functional Molecular Design and Synthesis;
                Categories
                Research Article
                Research Articles
                SciAdv r-articles
                Cancer
                Materials Science
                Cancer
                Custom metadata
                Karla Peñamante

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