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Van den Avont A, Sharma-Walia N. Anti-nucleolin aptamer AS1411: an advancing therapeutic. Front Mol Biosci 2023; 10:1217769. [PMID: 37808518 PMCID: PMC10551449 DOI: 10.3389/fmolb.2023.1217769] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 08/01/2023] [Indexed: 10/10/2023] Open
Abstract
Targeted therapy is highly desirable, as it allows for selective cytotoxicity on diseased cells without off-target side effects. Nucleolin is a remarkable target for cancer therapy given its high abundance, selective presence on the plasma membrane, and multifaceted influence on the initiation and progression of cancer. Nucleolin is a protein overexpressed on the cell membrane in many tumors and serves as a binding protein for several ligands implicated in angiogenesis and tumorigenesis. Nucleolin is present in the cytoplasm, nucleoplasm, and nucleolus and is used by selected pathogens for cell entry. AS1411 is a guanosine-rich oligonucleotide aptamer that binds nucleolin and is internalized in the tumor cells. AS1411 is well tolerated at therapeutic doses and localizes to tumor cells overexpressing nucleolin. AS1411 has a good safety profile with efficacy in relapsed acute myeloid leukemia and renal cell carcinoma producing mild or moderate side effects. The promising potential of AS1411 is its ability to be conjugated to drugs and nanoparticles. When a drug is bound to AS1411, the drug will localize to tumor cells leading to targeted therapy with fewer systemic side effects than traditional practices. AS1411 can also be bound to nanoparticles capable of detecting nucleolin at concentrations far lower than lab techniques used today for cancer diagnosis. AS1411 has a promising potential to change cancer diagnoses and treatment.
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Affiliation(s)
| | - Neelam Sharma-Walia
- Rosalind Franklin University of Medicine and Science, North Chicago, IL, United States
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Fang L, Wang KK, Huang Q, Cheng F, Huang F, Liu WW. Nucleolin Mediates LPS-induced Expression of Inflammatory Mediators and Activation of Signaling Pathways. Curr Med Sci 2020; 40:646-653. [PMID: 32862374 DOI: 10.1007/s11596-020-2229-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 05/05/2020] [Indexed: 12/19/2022]
Abstract
In this study, we investigated the effects of nucleolin on lipopolysaccharide (LPS)-induced activation of MAPK and NF-KappaB (NF-κB) signaling pathways and secretion of TNF-α, IL-1β and HMGB1 in THP-1 monocytes. Immunofluorescence assay and Western blotting were used to identify the nucleolin expression in cell membrane, cytoplasm and nucleus of THP-1 monocytes. Inactivation of nucleolin was induced by neutralizing antibody against nucleolin. THP-1 monocytes were pretreated with anti-nucleolin antibody for 1 h prior to LPS challenge. The irrelevant IgG group was used as control. Secretion of inflammatory mediators (TNF-α, IL-1β and HMGB1) and activation of MAPK and NF-κB/I-κB signaling pathways were examined to assess the effects of nucleolin on LPS-mediated inflammatory response. Nucleolin existed in cell membrane, cytoplasm and nucleus of THP-1 monocytes. Pretreatment of anti-nucleolin antibody significantly inhibited the LPS-induced secretion of TNF-α, IL-1β and HMGB1. P38, JNK, ERK and NF-κB subunit p65 inhibitors could significantly inhibit the secretion of IL-1β, TNF-α and HMGB1 induced by LPS. Moreover, the phosphorylation of p38, JNK, ERK and p65 (or nuclear translocation of p65) was significantly increased after LPS challenge. In contrast, pretreatment of anti-nucleolin antibody could significantly inhibit the LPS-induced phosphorylation of p38, JNK, ERK and p65 (or nuclear translocation of p65). However, the irrelevant IgG, as a negative control, had no effect on LPS-induced secretion of TNF-α and IL-1β and phosphorylation of p38, JNK, ERK and p65 (or nuclear translocation of p65). We demonstrated that nucleolin mediated the LPS-induced activation of MAPK and NF-κB signaling pathways, and regulated the secretion of inflammatory mediators (TNF-α, IL-1β and HMGB1).
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Affiliation(s)
- Li Fang
- Department of Cardiology, the First Hospital of Changsha, Changsha, 410008, China.
| | - Kang-Kai Wang
- Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, 410008, China
| | - Qing Huang
- Department of Cardiology, the First Hospital of Changsha, Changsha, 410008, China
| | - Feng Cheng
- Department of Cardiology, the First Hospital of Changsha, Changsha, 410008, China
| | - Fang Huang
- Department of Cardiology, the First Hospital of Changsha, Changsha, 410008, China
| | - Wei-Wei Liu
- Department of Cardiology, the First Hospital of Changsha, Changsha, 410008, China
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Ahmed M, Baumgartner R, Aldi S, Dusart P, Hedin U, Gustafsson B, Caidahl K. Human serum albumin-based probes for molecular targeting of macrophage scavenger receptors. Int J Nanomedicine 2019; 14:3723-3741. [PMID: 31190821 PMCID: PMC6535103 DOI: 10.2147/ijn.s197990] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Accepted: 03/01/2019] [Indexed: 02/05/2023] Open
Abstract
Background: Inflammation and accumulation of macrophages are key features of unstable atherosclerotic plaques. The ability of macrophages to take up molecular probes can be exploited in new clinical imaging methods for the detection of unstable atherosclerotic lesions. We investigated whether modifications of human serum albumin (HSA) could be used to target macrophages efficiently in vitro. Materials and methods: Maleylated and aconitylated HSA were compared with unmodified HSA. Fluorescent or radiolabeled (89Zr) modified HSA was used in in vitro experiments to study cellular uptake by differentiated THP-1 cells and primary human macrophages. The time course of uptake was evaluated by flow cytometry, confocal microscopy, real-time microscopy and radioactivity measurements. The involvement of scavenger receptors (SR-A1, SR-B2, LOX-1) was assessed by knockdown experiments using RNA interference, by blocking experiments and by assays of competition by modified low-density lipoprotein. Results: Modified HSA was readily taken up by different macrophages. Uptake was mediated nonexclusively via the scavenger receptor SR-A1 (encoded by the MSR1 gene). Knockdown of CD36 and ORL1 had no influence on the uptake. Modified HSA was preferentially taken up by human macrophages compared with other vascular cell types such as endothelial cells and smooth muscle cells. Conclusions: Modified 89Zr-labeled HSA probes were recognized by different subsets of polarized macrophages, and maleylated HSA may be a promising radiotracer for radionuclide imaging of macrophage-rich inflammatory vascular diseases.
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Affiliation(s)
- Mona Ahmed
- Department of Molecular Medicine and Surgery, Karolinska Institutet, SE 17176, Stockholm, Sweden
| | - Roland Baumgartner
- Department of Medicine Solna, Karolinska Institutet, SE 17176, Stockholm, Sweden
| | - Silvia Aldi
- Section for Medical Inflammation Research, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, SE 17177, Stockholm, Sweden
| | - Philip Dusart
- Department of Cellular and Clinical Proteomics, Science for Life Laboratory, Kungliga Tekniska Högskolan (KTH), SE 17165, Stockholm, Sweden
| | - Ulf Hedin
- Department of Molecular Medicine and Surgery, Karolinska Institutet, SE 17176, Stockholm, Sweden
| | - Björn Gustafsson
- Department of Molecular Medicine and Surgery, Karolinska Institutet, SE 17176, Stockholm, Sweden
| | - Kenneth Caidahl
- Department of Molecular Medicine and Surgery, Karolinska Institutet, SE 17176, Stockholm, Sweden
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, SE 41345, Gothenburg, Sweden
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Hamasaki S, Kobori T, Yamazaki Y, Kitaura A, Niwa A, Nishinaka T, Nishibori M, Mori S, Nakao S, Takahashi H. Effects of scavenger receptors-1 class A stimulation on macrophage morphology and highly modified advanced glycation end product-protein phagocytosis. Sci Rep 2018; 8:5901. [PMID: 29651042 PMCID: PMC5897562 DOI: 10.1038/s41598-018-24325-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 03/29/2018] [Indexed: 12/30/2022] Open
Abstract
Advanced glycation end-products (AGEs), which comprise non-enzymatically glycosylated proteins, lipids, and nucleic acid amino groups, play an important role in several diseases and aging processes including angiopathy, renal failure, diabetic complications, and neurodegenerative diseases. Among AGE-associated phenotypes, toxic AGEs, glyceraldehyde-derived AGE-2, and glycolaldehyde-derived AGE-3 are involved in the pathogenesis of diabetic complications. In addition, macrophages are reported to remove extracellular AGEs from tissues via scavenger receptors, leading to the progression of atherosclerosis. In the present study, we found that AGE-2 and AGE-3 enhanced their own endocytic uptake by RAW264.7 mouse macrophage-like cells in a concentration-dependent manner. Furthermore, we demonstrated, for the first time, the morphology of phagocytic macrophages and the endocytosis of AGE particles. The toxic AGEs induced the expression of a scavenger receptor, CD204/scavenger receptors-1 class A (SR-A). Notably, an antibody against CD204 significantly prevented toxic AGE uptake. Moreover, an SR-A antagonistic ligand, fucoidan, also attenuated the AGE-2- and AGE-3-evoked uptake in a concentration-dependent manner. These results indicated that SR-A stimulation, at least in part, plays a role in AGE uptake.
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Affiliation(s)
- Shinichi Hamasaki
- Department of Anesthesiology, Kindai University, Faculty of Medicine, 377-2 Ohno-Higashi, Osaka-Sayama, Osaka, 589-8511, Japan
| | - Takuro Kobori
- Department of Pharmacology, Kindai University, Faculty of Medicine, 377-2 Ohno-Higashi, Osaka-Sayama, Osaka, 589-8511, Japan
| | - Yui Yamazaki
- Department of Pharmacology, Kindai University, Faculty of Medicine, 377-2 Ohno-Higashi, Osaka-Sayama, Osaka, 589-8511, Japan
| | - Atsuhiro Kitaura
- Department of Anesthesiology, Kindai University, Faculty of Medicine, 377-2 Ohno-Higashi, Osaka-Sayama, Osaka, 589-8511, Japan
| | - Atsuko Niwa
- Department of Pharmacology, Kindai University, Faculty of Medicine, 377-2 Ohno-Higashi, Osaka-Sayama, Osaka, 589-8511, Japan
| | - Takashi Nishinaka
- Department of Pharmacology, Kindai University, Faculty of Medicine, 377-2 Ohno-Higashi, Osaka-Sayama, Osaka, 589-8511, Japan
| | - Masahiro Nishibori
- Department of Pharmacology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Okayama, Japan
| | - Shuji Mori
- Department of Pharmacy, Shujitsu University, 1-6-1 Nishikawahara, Okayama, Japan
| | - Shinichi Nakao
- Department of Anesthesiology, Kindai University, Faculty of Medicine, 377-2 Ohno-Higashi, Osaka-Sayama, Osaka, 589-8511, Japan
| | - Hideo Takahashi
- Department of Pharmacology, Kindai University, Faculty of Medicine, 377-2 Ohno-Higashi, Osaka-Sayama, Osaka, 589-8511, Japan.
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Miki Y, Tachibana Y, Ohminato Y, Fujiwara Y. Nucleolin Acts as a Scavenger Receptor for Acetylated Low-Density Lipoprotein on Macrophages. Biol Pharm Bull 2015; 38:1420-4. [PMID: 26328500 DOI: 10.1248/bpb.b15-00260] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
Although macrophage phagocytoses modified low-density lipoprotein (LDL), excessive accumulation of modified LDL induces macrophage foam cell formation, which is a feature of atherosclerotic plaque. Thus, the identification of scavenger receptor for modified LDL will provide better understanding of an atherosclerotic event. We recently showed that nucleolin expressed on macrophages acts as a scavenger receptor for various endogenous discarded products. Here, we investigated whether or not nucleolin is involved in the uptake of acetylated LDL (AcLDL). In contrast to normal LDL, AcLDL directly bound to immobilized nucleolin. AcLDL exhibited a higher affinity for macrophages than normal LDL. This binding of AcLDL was inhibited by anti-nucleolin antibody and antineoplastic guanine-rich oligonucleotide (AGRO), a nucleolin-specific oligonucleotide aptamer. In addition, AcLDL exhibited a higher affinity for HEK cells transfected with nucleolin than those without. Further, intracellular accumulation of AcLDL was also inhibited by anti-nucleolin antibody. The results of this study suggest that nucleolin expressed on macrophages is a receptor for AcLDL.
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Affiliation(s)
- Yuichi Miki
- Department of Environmental Health, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
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