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Ashfaq R, Rasul A, Asghar S, Kovács A, Berkó S, Budai-Szűcs M. Lipid Nanoparticles: An Effective Tool to Improve the Bioavailability of Nutraceuticals. Int J Mol Sci 2023; 24:15764. [PMID: 37958750 PMCID: PMC10648376 DOI: 10.3390/ijms242115764] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 10/26/2023] [Accepted: 10/28/2023] [Indexed: 11/15/2023] Open
Abstract
Nano-range bioactive colloidal carrier systems are envisaged to overcome the challenges associated with treatments of numerous diseases. Lipid nanoparticles (LNPs), one of the extensively investigated drug delivery systems, not only improve pharmacokinetic parameters, transportation, and chemical stability of encapsulated compounds but also provide efficient targeting and reduce the risk of toxicity. Over the last decades, nature-derived polyphenols, vitamins, antioxidants, dietary supplements, and herbs have received more attention due to their remarkable biological and pharmacological health and medical benefits. However, their poor aqueous solubility, compromised stability, insufficient absorption, and accelerated elimination impede research in the nutraceutical sector. Owing to the possibilities offered by various LNPs, their ability to accommodate both hydrophilic and hydrophobic molecules and the availability of various preparation methods suitable for sensitive molecules, loading natural fragile molecules into LNPs offers a promising solution. The primary objective of this work is to explore the synergy between nature and nanotechnology, encompassing a wide range of research aimed at encapsulating natural therapeutic molecules within LNPs.
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Affiliation(s)
- Rabia Ashfaq
- Institute of Pharmaceutical Technology and Regulatory Affairs, Faculty of Pharmacy, University of Szeged, Eötvös u. 6, H-6720 Szeged, Hungary; (R.A.)
| | - Akhtar Rasul
- Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Faisalabad 38000, Pakistan; (A.R.); (S.A.)
| | - Sajid Asghar
- Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Faisalabad 38000, Pakistan; (A.R.); (S.A.)
| | - Anita Kovács
- Institute of Pharmaceutical Technology and Regulatory Affairs, Faculty of Pharmacy, University of Szeged, Eötvös u. 6, H-6720 Szeged, Hungary; (R.A.)
| | - Szilvia Berkó
- Institute of Pharmaceutical Technology and Regulatory Affairs, Faculty of Pharmacy, University of Szeged, Eötvös u. 6, H-6720 Szeged, Hungary; (R.A.)
| | - Mária Budai-Szűcs
- Institute of Pharmaceutical Technology and Regulatory Affairs, Faculty of Pharmacy, University of Szeged, Eötvös u. 6, H-6720 Szeged, Hungary; (R.A.)
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Sidorenko GV, Miroslavov AE, Tyupina MY. Technetium(I) carbonyl complexes for nuclear medicine: Coordination-chemical aspect. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Edwards HM, Sasiene ZJ, Mendis PM, Jackson GP. Structural Characterization of Natural and Synthetic Macrocycles Using Charge-Transfer Dissociation Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2022; 33:671-680. [PMID: 35195991 DOI: 10.1021/jasms.1c00369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Research in natural products (NPs) has gained interest as drug developers turn to nature to combat problems with drug resistance, drug delivery, and emerging diseases. Whereas NPs offer a tantalizing source of new pharmacologically active compounds, their structural complexity presents a challenge for analytical characterization and organic synthesis. Of particular concern is the characterization of cyclic-, polycyclic-, or macrocyclic compounds. One example of endogenous compounds as inspiration for NP development are cobalamins, like vitamin B12. An example of exogenous NPs is the class of macrolides that includes erythromycin. Both classes of macrocycles feature analogues with a range of modifications on their macrocyclic cores, but because of their cyclic nature, they are generally resistant to fragmentation by collision-induced dissociation (CID). In the present work, charge-transfer dissociation (CTD) was employed, with or without supplemental collisional activation, to produce radical-driven, high-energy fragmentation products of different macrocyclic precursors. With the assistance of collisional activation of CTnoD products, CTD frequently cleaved two covalent bonds within the macrocycle cores to reveal rich, informative spectra that helped identify sites of modification and resolve structural analogues. In a third example of macrocycle fragmentation, CTD enabled an impurity in a biological sample to be characterized as a cyclic polymer of nylon-6,6. In each example, CTD spectra are starkly different from CID and are highly reminiscent of other high-energy fragmentation techniques like extreme ultraviolet dissociative photoionization (XUV-DPI) and electron ionization-induced dissociation (EID). The results indicate that CTD-MS is a useful tool for the characterization of natural and synthetic macrocycles.
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Affiliation(s)
- Halle M Edwards
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Zachary J Sasiene
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Praneeth M Mendis
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Glen P Jackson
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
- Department of Forensic and Investigative Science, West Virginia University, Morgantown, West Virginia 26506, United States
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Li H, Guo L, Cai Z. TCN1 is a potential prognostic biomarker and correlates with immune infiltrates in lung adenocarcinoma. World J Surg Oncol 2022; 20:83. [PMID: 35287670 PMCID: PMC8922850 DOI: 10.1186/s12957-022-02556-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 03/03/2022] [Indexed: 12/30/2022] Open
Abstract
Background Around the world, lung cancer is the leading cause of cancer-related death. Lung adenocarcinomas are among the most common diagnosed forms of lung cancer, whose overall survival has not improved significantly, which makes finding an effective therapeutic target vital. Transcobalamin (TCN1) is a vitamin B12-binding protein which regulates cobalamin homeostasis. In tumor tissues, TCN1 is expressed highly, and its expression is correlated with cancer aggressiveness and poor prognosis according to recent studies and bioinformatic analyses. However, its effect on lung adenocarcinoma (LUAD) is unknown. Methods We evaluated whether TCN1 shows diagnostic and prognostic value in LUAD using bioinformatic analysis. In particular, various databases and analysis tools were used to determine TCN1’s relationship with LUAD, including TCGA, GTEx, GEO, STRING, and TISIDB. Results As compared to normal lung tissue, the level of TCN1 expression in LUAD tissues was significantly higher (P < 0.001). TCN1 also had a good ability to distinguish lung adenocarcinoma from non-lung adenocarcinoma samples [area under the curve (AUC) = 0.788]. According to univariate Cox statistics, high expression levels of TCN1 correlate with poor overall survival (OS) in LUAD (P < 0.001). Moreover, based on a multivariate Cox analysis, TCN1 expression was independently correlated with OS (P = 0.011). GO/KEGG and GSEA indicated enrichment in epidermal cell differentiation (P < 0.0005), keratinocyte differentiation (P < 0.0005), neuroactive ligand–receptor interaction (P < 0.0005), epithelial–mesenchymal transition (P = 0.029, FDR = 0.023) and TNFA signaling via NFKB (P = 0.029, FDR = 0.023). Furthermore, TCN1 is associated with immune infiltration based on an analysis of immune cell infiltration. Conclusions In summary, TCN1 could be used as a prognostic and diagnostic biomarker and provide deeper perspectives for the development of therapies and prognostic markers in LUAD.
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Radiolabeled vitamins as the potential diagnostic probes for targeted tumor imaging. Bioorg Chem 2022; 122:105717. [DOI: 10.1016/j.bioorg.2022.105717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 02/26/2022] [Accepted: 03/01/2022] [Indexed: 11/18/2022]
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Bloch JS, Sequeira JM, Ramírez AS, Quadros EV, Locher KP. Generation of nanobodies targeting the human, transcobalamin-mediated vitamin B 12 uptake route. FASEB J 2022; 36:e22222. [PMID: 35218573 DOI: 10.1096/fj.202101376rr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 02/04/2022] [Accepted: 02/10/2022] [Indexed: 11/11/2022]
Abstract
Cellular uptake of vitamin B12 in humans is mediated by the endocytosis of the B12 carrier protein transcobalamin (TC) via its cognate cell surface receptor TCblR, encoded by the CD320 gene. Because CD320 expression is associated with the cell cycle and upregulated in highly proliferating cells including cancer cells, this uptake route is a potential target for cancer therapy. We developed and characterized four camelid nanobodies that bind holo-TC (TC in complex with B12 ) or the interface of the human holo-TC:TCblR complex with nanomolar affinities. We determined X-ray crystal structures of these nanobodies bound to holo-TC:TCblR, which enabled us to map their binding epitopes. When conjugated to the model toxin saporin, three of our nanobodies caused growth inhibition of HEK293T cells and therefore have the potential to inhibit the growth of human cancer cells. We visualized the cellular binding and endocytic uptake of the most potent nanobody (TC-Nb4) using fluorescent light microscopy. The co-crystal structure of holo-TC:TCblR with another nanobody (TC-Nb34) revealed novel features of the interface of TC and the LDLR-A1 domain of TCblR, rationalizing the decrease in the affinity of TC-B12 binding caused by the Δ88 mutation in CD320.
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Affiliation(s)
- Joël S Bloch
- Institute of Molecular Biology and Biophysics, ETH Zürich, Zürich, Switzerland
| | - Jeffrey M Sequeira
- Department of Medicine, SUNY-Downstate Medical Center, Brooklyn, New York, USA
| | - Ana S Ramírez
- Institute of Molecular Biology and Biophysics, ETH Zürich, Zürich, Switzerland
| | - Edward V Quadros
- Department of Medicine, SUNY-Downstate Medical Center, Brooklyn, New York, USA
| | - Kaspar P Locher
- Institute of Molecular Biology and Biophysics, ETH Zürich, Zürich, Switzerland
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Zhu X, Zhou G, Ma M, Hou D, Huang H, Jiang X, Xing PhD C. Clinicopathological Analysis and Prognostic Assessment of TCN1 in Patients with Gastric Cancer. Surg Innov 2021; 29:557-565. [PMID: 34549663 DOI: 10.1177/15533506211045318] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
BACKGROUND Stomach cancer is the fourth most common type of cancer worldwide. TCN1 mainly encodes the vitamin B12 transporter, transcobalamin. TCN1 is a marker of gastrointestinal tumor progression, but the impact of TCN1 on survival is unclear. MATERIAL/METHODS Gastrointestinal tumor records were reviewed and analyzed, clinicopathological data were summarized, immunohistochemical detection of TCN1 was performed again, and the protein expression in tumor tissue, non-tumor tissue, and lymph nodes was semi-quantitatively analyzed. Patients were followed up for 5 years to determine the 5-year survival rates. RESULTS The strong immune reactivity of the TCN1 protein was significantly correlated with tumor invasion depth, regional lymph nodes, and a tumor diameter of >5 cm (Z = -2.531 and P = .016; Z = 3.785 and P < .001; Z = 2.541 and P = .049). Kaplan-Meier survival analysis showed that the total survival time of patients in the low-expression TCN1 group was significantly longer than that in the high-expression TCN1 group (P = .001; Table 2 and Figure 5). The mean survival time of all patients was 49.774 months (95% CI: 47.871-51.676; Table 4) and the 5-year overall survival rates were 73.3, 50.8, and 34.0%, respectively. Multivariate analysis revealed that regional lymph nodes (HR = 1.253; 95% CI: 1.031-1.747, P = .012), TCN1 immune expression status (HR = 2.707; 95% CI: 1.068-1.886, P = .016), and pTNM staging (HR = 2.293; 95% CI: 1.583-3.321; P = .001) were independent risk factors for poor survival. CONCLUSION The high expression of TCN1 in gastric tumor tissues was found to be associated with the clinicopathological factors of patients, and the high expression of TCN1 was shown to indicate a poor clinical prognosis.
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Affiliation(s)
- Xinqiang Zhu
- Department of General Surgery, 105860The Second Affiliated Hospital of Soochow University, Suzhou, China.,Department of General Surgery, The Affiliated Suqian Hospital of Xuzhou Medical University, Suqian, China
| | - Gang Zhou
- Department of Gastroenteropancreatic Surgery, 579164The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, China
| | - Meimei Ma
- Department of General Surgery, The Affiliated Suqian Hospital of Xuzhou Medical University, Suqian, China
| | - Daorong Hou
- Key Laboratory of Animal Research Affiliated to Nanjing Medical University, Nanjing, China
| | - Hailong Huang
- Department of General Surgery, The Affiliated Suqian Hospital of Xuzhou Medical University, Suqian, China
| | - Xuetong Jiang
- Department of General Surgery, The Affiliated Suqian Hospital of Xuzhou Medical University, Suqian, China
| | - Chungen Xing PhD
- Department of General Surgery, 105860The Second Affiliated Hospital of Soochow University, Suzhou, China
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Fotopoulou E, Titilas I, Ronconi L. Metallodrugs as Anticancer Chemotherapeutics and Diagnostic Agents: A Critical Patent Review (2010-2020). Recent Pat Anticancer Drug Discov 2021; 17:42-54. [PMID: 34493191 DOI: 10.2174/1574892816666210907101146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 07/07/2021] [Accepted: 07/07/2021] [Indexed: 12/24/2022]
Abstract
BACKGROUND The development of metallodrugs with potential applications in cancer treatment and diagnosis has been a hot topic since the approval and subsequent marketing of the anticancer drug cisplatin in 1978. Since then, thousands of metal-based derivatives have been reported and evaluated for their chemotherapeutic or tumor imaging properties, but only a very limited number gained clinical status. Nonetheless, research in the field has been increasing exponentially over the years, especially in a view to exploiting novel drug designing approaches and strategies aimed at improving pharmacological outcomes and, at the same time, reducing side-effects. OBJECTIVE This review article reports on the patents filed during the last decade and strictly focusing on the development of metal-based anticancer and diagnostic agents. The goal is to identify the latest trends and designing strategies in the field, which would represent a valuable starting point to researchers interested in the development of metallodrugs. METHODS The most relevant patents filed in the 2010-2020 timeframe have been retrieved from various databases using dedicated search engines (such as SciFinder, Google Patents, PatentPak, Espacenet, Global Dossier, PatentScope), sorted by type of metallodrug and screened to include those reporting a substantial amount of biological data. RESULTS The majority of patents here reviewed are concerned with metallodrugs (mostly platinum-based) showing interesting pharmacological properties but no specific tumor-targeting features. Nonetheless, some promising trends in the development of novel drug delivery strategies and/or metallodrugs with potential applications in targeted chemotherapy are envisaged. CONCLUSION In this review, the latest trends in the development of metallodrugs from recent patents are summarized and critically discussed. Such trends would be of interest not only to the scientific community but also to lay audiences aiming to broaden their knowledge of the field and industrial stakeholders potentially interested in the exploitation and commercialization of this class of pharmaceuticals.
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Affiliation(s)
- Eirini Fotopoulou
- School of Chemistry, College of Science and Engineering, National University of Ireland Galway, University Road, Galway H91 TK33. Ireland
| | - Ioannis Titilas
- School of Chemistry, College of Science and Engineering, National University of Ireland Galway, University Road, Galway H91 TK33. Ireland
| | - Luca Ronconi
- School of Chemistry, College of Science and Engineering, National University of Ireland Galway, University Road, Galway H91 TK33. Ireland
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Porębska D, Orzeł Ł, Rutkowska-Zbik D, Stochel G, van Eldik R. Ligand-Tuning of the Stability of Pd(II) Conjugates with Cyanocobalamin. Int J Mol Sci 2021; 22:ijms22157973. [PMID: 34360738 PMCID: PMC8347314 DOI: 10.3390/ijms22157973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 07/21/2021] [Accepted: 07/22/2021] [Indexed: 11/16/2022] Open
Abstract
Besides the well-known functions performed by vitamin B12 (CblCN) in biochemical processes of the human body, an increasing interest has been raised by the possibility of its use as a transmembrane drug carrier, capable, among others, of enhancing the accumulation of inorganic cytostatics in cancer cells. The present study was aimed at determining the possibility of the formation of CblCN conjugates with Pd(II) complexes. A key aspect was their stability, which we attempted to tune by appropriate choice of ligands. Syntheses, spectroscopic analysis of postreaction systems and kinetic investigations of conjugate formation reactions, have been complemented by DFT modelling. The obtained results showed that ligand charge, geometry and electron affinity may have a significant impact on carrier binding and release leading to the activation of the Pd(II) complex. This provides a rationale to expect that with appropriate composition of the coordination sphere, it will be possible to extend the spectrum of less toxic inorganic chemotherapeutics.
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Affiliation(s)
- Dominika Porębska
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland; (D.P.); (G.S.)
| | - Łukasz Orzeł
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland; (D.P.); (G.S.)
- Correspondence: (Ł.O.); (R.v.E.); Tel.: +48-126862486 (Ł.O.); +48-667772932 (R.v.E.)
| | - Dorota Rutkowska-Zbik
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland;
| | - Grażyna Stochel
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland; (D.P.); (G.S.)
| | - Rudi van Eldik
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland; (D.P.); (G.S.)
- Department of Chemistry and Pharmacy, University Erlangen-Nuremberg, Egerlandstr 1, 91058 Erlangen, Germany
- Correspondence: (Ł.O.); (R.v.E.); Tel.: +48-126862486 (Ł.O.); +48-667772932 (R.v.E.)
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Biotinylated Mn 3O 4 nanocuboids for targeted delivery of gemcitabine hydrochloride to breast cancer and MRI applications. Int J Pharm 2021; 606:120895. [PMID: 34280487 DOI: 10.1016/j.ijpharm.2021.120895] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 07/05/2021] [Accepted: 07/12/2021] [Indexed: 11/22/2022]
Abstract
Multifunctional nanocarriers have been found as potential candidate for the targeted drug delivery and imaging applications. Herein, we have developed a biocompatible and pH-responsive manganese oxide nanocuboid system, surface modified with poly (ethylene glycol) bis(amine) and functionalized with biotin (Biotin-PEG-MNCs), for an efficient and targeted delivery of an anticancer drug (gemcitabine, GEM) to the human breast cancer cells. GEM-loaded Biotin-PEG@MNCs showed high drug loading efficiency, controlled release of GEM and excellent storage stability in the physiological buffers and different temperature conditions. GEM-loaded Biotin-PEG@MNCs showed dose- and time-dependent decrease in the viability of human breast cancer cells. Further, it exhibited significantly higher cell growth inhibition than pure GEM which suggested that Biotin-PEG@MNCs has efficiently delivered the GEM into cancerous cells. The role of biotin in the uptake was proved by the competitive binding-based cellular uptake study. A significant decrease in the amount of manganese was observed in biotin pre-treated cancer cells as compared to biotin untreated cancer cells. In MRI studies, Biotin-PEG-MNCs showed both longitudinal and transverse relaxivity about 0.091 and 7.66 mM-1 s-1 at 3.0 T MRI scanner, respectively. Overall, the developed Biotin-PEG-MNCs presents a significant potential in formulation development for cancer treatment via targeted drug delivery and enhanced MRI contrast imaging properties.
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Jackowska A, Gryko D. Vitamin B 12 Derivatives Suitably Tailored for the Synthesis of Photolabile Conjugates. Org Lett 2021; 23:4940-4944. [PMID: 33794095 DOI: 10.1021/acs.orglett.1c00839] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Vitamin B12 conjugates are broadly studied in biological sciences. As light offers spatiotemporal control, we decided to develop a method for the preparation of vitamin B12 conjugates that release tethered molecules upon exposure to light. Herein, we report vitamin B12 derivatives possessing a photolabile linker suitable for conjugation with amines, azides, and alkynes. The potential applications of such conjugates are broad and include the delivery of drugs, labels, and imaging agents to their place of action and spatiotemporal release.
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Affiliation(s)
- Agnieszka Jackowska
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Dorota Gryko
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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Abstract
More than four decades have passed since the first example of a light-activated (caged) compound was described. In the intervening years, a large number of light-responsive derivatives have been reported, several of which have found utility under a variety of in vitro conditions using cells and tissues. Light-triggered bioactivity furnishes spatial and temporal control, and offers the possibility of precision dosing and orthogonal communication with different biomolecules. These inherent attributes of light have been advocated as advantageous for the delivery and/or activation of drugs at diseased sites for a variety of indications. However, the tissue penetrance of light is profoundly wavelength-dependent. Only recently have phototherapeutics that are photoresponsive in the optical window of tissue (600-900 nm) been described. This Review highlights these recent discoveries, along with their limitations and clinical opportunities. In addition, we describe preliminary in vivo studies of prospective phototherapeutics, with an emphasis on the path that remains to be navigated in order to translate light-activated drugs into clinically useful therapeutics. Finally, the unique attributes of phototherapeutics is highlighted by discussing several potential disease applications.
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Abstract
The recently delineated structure- and reactivity-based concept of antivitamins B12 has begun to bear fruit by the generation, and study, of a range of such B12 -dummies, either vitamin B12 -derived, or transition metal analogues that also represent potential antivitamins B12 or specific B12 -antimetabolites. As reviewed here, this has opened up new research avenues in organometallic B12 -chemistry and bioinorganic coordination chemistry. Exploratory studies with antivitamins B12 have, furthermore, revealed some of their potential, as pharmacologically interesting compounds, for inducing B12 -deficiency in a range of organisms, from hospital resistant bacteria to laboratory mice. The derived capacity of antivitamins B12 to induce functional B12 -deficiency in mammalian cells and organs also suggest their valuable potential as growth inhibitors of cancerous human and animal cells.
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Affiliation(s)
- Bernhard Kräutler
- Institute of Organic Chemistry and Center for Molecular Biosciences (CMBI)University of Innsbruck6020InnsbruckAustria
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14
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Zhu X, Yi K, Hou D, Huang H, Jiang X, Shi X, Xing C. Clinicopathological Analysis and Prognostic Assessment of Transcobalamin I (TCN1) in Patients with Colorectal Tumors. Med Sci Monit 2020; 26:e923828. [PMID: 32753569 PMCID: PMC7397756 DOI: 10.12659/msm.923828] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Colorectal cancer (CRC) is one of the most common malignancies worldwide. Overall survival (OS) of patients is largely dependent on disease stage at diagnosis and/or surgical resection. TCN1 mainly encodes the vitamin B12 transporter, transcobalamin. Early studies show that TCN1 is a marker of CRC progression, but the impact of TCN1 on survival is unclear. MATERIAL AND METHODS We reviewed and analyzed colorectal tumor records, summarized the clinicopathological data, performed immunohistochemical detection of TCN1 again, and semi-quantitatively analyzed protein expression in tumor tissue, non-tumor tissue, and lymph nodes. We followed up patients for 5-year survival. RESULTS Of 123 patients, 60 (48.7%) had a strong TCN1 immunohistochemical reaction, 36 (29.3%) had a moderate immune response, and 27 (22.0%) had weak expression. The level of immunohistochemical reactivity of TCN1 was correlated with the degree of histological differentiation (H (2.92)=4.976; P=0.083). Survival analysis showed that OS in patients with low TCN1 expression was significantly longer than that in the medium and high TCN1 expression groups (P=0.045). Five-year OS in patients with low, medium, and high TCN1 expression was 88.9%, 50.0%, and 40.0%, respectively. In univariate analysis, TCN1 immune expression was significantly correlated with the 5-year survival rate. CONCLUSIONS Although independent risk factors affecting survival of patients with CRC are age, serum CA125, CA19-9, lymph node metastasis, and nerve invasion, negative factors affecting overall 5-year survival in TCN1 should not be ignored, because its high expression suggests a worse clinical prognosis.
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Affiliation(s)
- Xinqiang Zhu
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China (mainland).,Department of General Surgery, The Affiliated Suqian Hospital of Xuzhou Medical University, Suqian, Jiangsu, China (mainland)
| | - Kui Yi
- Department of Gastroenteropancreatic Surgery, The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, Jiangsu, China (mainland)
| | - Daorong Hou
- Key Laboratory of Animal Research Affiliated to Nanjing Medical University, Nanjing, Jiangsu, China (mainland)
| | - Hailong Huang
- Department of General Surgery, The Affiliated Suqian Hospital of Xuzhou Medical University, Suqian, Jiangsu, China (mainland)
| | - Xuetong Jiang
- Department of General Surgery, The Affiliated Suqian Hospital of Xuzhou Medical University, Suqian, Jiangsu, China (mainland)
| | - Xiaohong Shi
- Department of General Surgery, The Affiliated Suqian Hospital of Xuzhou Medical University, Suqian, Jiangsu, China (mainland)
| | - Chungen Xing
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China (mainland)
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High expression of TCN1 is a negative prognostic biomarker and can predict neoadjuvant chemosensitivity of colon cancer. Sci Rep 2020; 10:11951. [PMID: 32686693 PMCID: PMC7371683 DOI: 10.1038/s41598-020-68150-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 06/17/2020] [Indexed: 01/09/2023] Open
Abstract
Transcobalamin (TCN1) is a vitamin B12 (cobalamin)-binding protein that regulates cobalamin homeostasis. Recent studies and bioinformatic analyses have found that TCN1 is highly expressed in cancer tissues and is associated with tumour aggressiveness and poor prognosis. The present study aimed to detect TCN1 as a novel biomarker for prognosis and chemosensitivity of colon cancer. Next-generation sequencing showed that TCN1 was one of several upregulated mRNAs in colon cancer, which was verified by further bioinformatics analyses. Western blotting (n = 9) and quantitative real time polymerase chain reaction (qRT-PCR, n = 30) revealed that TCN1 was highly expressed in colon cancer tissues at both the protein and mRNA level. A total of 194 cases of colon cancer were examined by immunohistochemistry and revealed that TCN1 expression level was related to advanced stages (P < 0.005). Kaplan-Meier analysis verified that patients with lower TCN1 expression usually had longer overall survival (P = 0.008). In addition, TCN1 was highly expressed in pulmonary metastatic tumour tissues (n = 37, P = 0.025) and exhibited higher levels in right-sided colon cancer than in left-sided colon cancer (P = 0.029). TCN1 expression in specimens that had received neoadjuvant chemotherapy decreased compared with that in colonoscopy biopsy tissues (n = 42, P = 0.009). Further bioinformatics analyses verified that apoptosis pathways might have a role in high TCN1 expression. All the studies revealed that TCN1 expression in colon cancer was significantly associated with malignant biological behaviour. Therefore, TCN1 could be used as a novel biomarker for colon cancer aggressiveness and prognosis and might also be a potential biomarker for predicting neoadjuvant chemosensitivity.
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Szczepańska M, Lodowski P, Jaworska M. Electronic excited states and luminescence properties of palladium(II)corrin complex. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Rationally Designed Ruthenium Complexes for Breast Cancer Therapy. Molecules 2020; 25:molecules25020265. [PMID: 31936496 PMCID: PMC7024301 DOI: 10.3390/molecules25020265] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 12/31/2019] [Accepted: 01/01/2020] [Indexed: 12/11/2022] Open
Abstract
Since the discovery of the anticancer potential of ruthenium-based complexes, several species were reported as promising candidates for the treatment of breast cancer, which accounts for the greatest number of new cases in women every year worldwide. Among these ruthenium complexes, species containing bioactive ligand(s) have attracted increasing attention due to their potential multitargeting properties, leading to anticancer drug candidates with a broader range of cellular targets/modes of action. This review of the literature aims at providing an overview of the rationally designed ruthenium-based complexes that have been reported to date for which ligands were carefully selected for the treatment of hormone receptor positive breast cancers (estrogen receptor (ER+) or progesterone receptor (PR+)). In addition, this brief survey highlights some of the most successful examples of ruthenium complexes reported for the treatment of triple negative breast cancer (TNBC), a highly aggressive type of cancer, regardless of if their ligands are known to have the ability to achieve a specific biological function.
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Vitamin B 12b Enhances the Cytotoxicity of Diethyldithiocarbamate in a Synergistic Manner, Inducing the Paraptosis-Like Death of Human Larynx Carcinoma Cells. Biomolecules 2020; 10:biom10010069. [PMID: 31906414 PMCID: PMC7023477 DOI: 10.3390/biom10010069] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 12/29/2019] [Accepted: 12/30/2019] [Indexed: 11/24/2022] Open
Abstract
We have shown that hydroxycobalamin (vitamin B12b) increases the toxicity of diethyldithiocarbamate (DDC) to tumor cells by catalyzing the formation of disulfiram (DSF) oxi-derivatives. The purpose of this study was to elucidate the mechanism of tumor cell death induced by the combination DDC + B12b. It was found that cell death induced by DDC + B12b differed from apoptosis, autophagy, and necrosis. During the initiation of cell death, numerous vacuoles formed from ER cisterns in the cytoplasm, and cell death was partially suppressed by the inhibitors of protein synthesis and folding, the IP3 receptor inhibitor as well as by thiols. At this time, a short-term rise in the expression of ER-stress markers BiP and PERK with a steady increase in the expression of CHOP were detected. After the vacuolization of the cytoplasm, functional disorders of mitochondria and an increase in the generation of superoxide anion in them occurred. Taken together, the results obtained indicate that DDC and B12b used in combination exert a synergistic toxic effect on tumor cells by causing severe ER stress, extensive ER vacuolization, and inhibition of apoptosis, which ultimately leads to the induction of paraptosis-like cell death.
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Abstract
Single photon emission computed tomography (SPECT) is the state-of-the-art imaging modality in nuclear medicine despite the fact that only a few new SPECT tracers have become available in the past 20 years. Critical for the future success of SPECT is the design of new and specific tracers for the detection, localization, and staging of a disease and for monitoring therapy. The utility of SPECT imaging to address oncologic questions is dependent on radiotracers that ideally exhibit excellent tissue penetration, high affinity to the tumor-associated target structure, specific uptake and retention in the malignant lesions, and rapid clearance from non-targeted tissues and organs. In general, a target-specific SPECT radiopharmaceutical can be divided into two main parts: a targeting biomolecule (e.g., peptide, antibody fragment) and a γ-radiation-emitting radionuclide (e.g., 99mTc, 123I). If radiometals are used as the radiation source, a bifunctional chelator is needed to link the radioisotope to the targeting entity. In a rational SPECT tracer design, these single components have to be critically evaluated in order to achieve a balance among the demands for adequate target binding, and a rapid clearance of the radiotracer. The focus of this chapter is to depict recent developments of tumor-targeted SPECT radiotracers for imaging of cancer diseases. Possibilities for optimization of tracer design and potential causes for design failure are discussed and highlighted with selected examples.
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Tumor targeting vitamin B12 derivatives for X-ray induced treatment of pancreatic adenocarcinoma. Photodiagnosis Photodyn Ther 2019; 30:101637. [PMID: 31899377 DOI: 10.1016/j.pdpdt.2019.101637] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 12/16/2019] [Accepted: 12/23/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND X-Ray induced phototherapy is highly sought after as it provides a deep tissue, synergistic method of treating cancers via standard-of-care radiotherapy. When this is combined with releasable chemotherapy agents, it can provide high target selectivity, with reduced off-target organ effects that limit current systemic therapies. We have recently developed a unique light-activated drug delivery system whereby the drug is conjugated to an alkylcobalamin scaffold. Alkylcobalamins are actively transported into cells by transcobalamin receptors (TCblR), which are overexpressed in a variety of cancer types. We hope to utilize this cobalamin scaffold technology for drug delivery in pancreatic adenocarcinoma (PDAC) cancer. METHODS The ability of the cobalamin scaffold to selectively target PDAC was investigated by treating mice that had MIA PaCa-2 xenografts with an alkylcobalamin labeled with the fluorophore Bodipy650 (Bodipy650-cobalamin). The mice were imaged alive and organs as well as tumors were subsequently imaged ex vivo. In addition, we examined the potential of the cobalamin scaffold to deliver drugs to orthotopic pancreas MIA PaCa-2 tumors with Bodipy650-cobalamin. We determined the light dose required for release of cargo from the cobalamin scaffold by examining the fluorescence increase of Bodipy650-cobalamin in response to red light (650 nm). Finally, we probed the ability of the cobalamin scaffold to release cargo with increasing X-ray doses from a clinical linear accelerator. RESULTS We have found that Bodipy650-cobalamin was shown to localize in MIA PaCa-2 tumors, both in flank and orthotopic models. We quantified a light dose for red light release from the cobalamin scaffold that is within normal clinical doses required for photodynamic therapy. This derivative was also activated with clinical X-ray doses from a linear accelerator. CONCLUSIONS Tumor selectivity combined with fluorescence detection demonstrates the effectiveness of the vitamin B12 scaffold as a theranostic targeting agent. The activation of this scaffold with radiation from a linear accelerator shows potential for action as radiation-induced chemotherapy.
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Scheffer D, Kulcsár G, Nagyéri G, Kiss-Merki M, Rékási Z, Maloy M, Czömpöly T. Active mixture of serum-circulating small molecules selectively inhibits proliferation and triggers apoptosis in cancer cells via induction of ER stress. Cell Signal 2019; 65:109426. [PMID: 31669205 DOI: 10.1016/j.cellsig.2019.109426] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 09/19/2019] [Indexed: 12/14/2022]
Abstract
Genetic and epigenetic regulation as well as immune surveillance are known defense mechanisms to protect organisms from developing cancer. Based on experimental evidence, we proposed that small metabolically active molecules accumulating in cancer cells may play a role in an alternative antitumor surveillance system. Previously, we reported that treatment with a mixture of experimentally selected small molecules, usually found in the serum (defined 'active mixture', AM), selectively induces apoptosis in cancer cells and significantly inhibits tumor formation in vivo. In this study, we show that the AM elicits gene expression changes characteristic of endoplasmic reticulum (ER) stress in HeLa, MCF-7, PC-3 and Caco-2 cancer cells, but not in primary human renal epithelial cells. The activation of the ER stress pathway was confirmed by the upregulation of ATF3, ATF4, CHAC1, DDIT3 and GDF15 proteins. Mechanistically, our investigation revealed that eIF2α, PERK and IRE1α are phosphorylated upon treatment with the AM, linking the induction of ER stress to the antiproliferative and proapoptotic effects of the AM previously demonstrated. Inhibition of ER stress in combination with BBC3 and PMAIP1 knockdown completely abrogated the effect of the AM. Moreover, we also demonstrated that the AM induces mIR-3189-3p, which in turn enhances the expression of ATF3 and DDIT3, thus representing a possible new feedback mechanism in the regulation of ATF3 and DDIT3 during ER stress. Our results highlight small molecules as attractive anticancer agents and warrant further evaluation of the AM in cancer therapy, either alone or in combination with other ER stress inducing agents.
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Affiliation(s)
- Dalma Scheffer
- Cancer Research and Drug Development Center, Culevit Ltd., Pécs, Finn u. 1/1., 7630, Hungary
| | - Gyula Kulcsár
- Cancer Research and Drug Development Center, Culevit Ltd., Pécs, Finn u. 1/1., 7630, Hungary
| | - György Nagyéri
- Soft Flow Hungary Ltd., Pécs, Ürögi fasor 2/A, 7628, Hungary
| | | | - Zoltán Rékási
- Department of Anatomy, Medical School, University of Pécs, Pécs, Szigeti u. 12., 7624, Hungary
| | - Magnus Maloy
- Department of Anatomy, Medical School, University of Pécs, Pécs, Szigeti u. 12., 7624, Hungary
| | - Tamás Czömpöly
- Cancer Research and Drug Development Center, Culevit Ltd., Pécs, Finn u. 1/1., 7630, Hungary.
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Côrte-Real L, Karas B, Brás AR, Pilon A, Avecilla F, Marques F, Preto A, Buckley BT, Cooper KR, Doherty C, Garcia MH, Valente A. Ruthenium-Cyclopentadienyl Bipyridine-Biotin Based Compounds: Synthesis and Biological Effect. Inorg Chem 2019; 58:9135-9149. [PMID: 31241925 DOI: 10.1021/acs.inorgchem.9b00735] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Prospective anticancer metallodrugs should consider target-specific components in their design in order to overcome the limitations of the current chemotherapeutics. The inclusion of vitamins, which receptors are overexpressed in many cancer cell lines, has proven to be a valid strategy. Therefore, in this paper we report the synthesis and characterization of a set of new compounds [Ru(η5-C5H5)(P(C6H4R)3)(4,4'-R'-2,2'-bpy)]+ (R = F and R' = H, 3; R = F and R' = biotin, 4; R = OCH3 and R' = H, 5; R = OCH3 and R' = biotin, 6), inspired by the exceptional good results recently obtained for the analogue bearing a triphenylphosphane ligand. The precursors for these syntheses were also described following modified literature procedures, [Ru(η5-C5H5)(P(C6H4R)3)2Cl], where R is -F (1) or -OCH3 (2). The structure of all compounds is fully supported by spectroscopic and analytical techniques and by X-ray diffraction studies for compounds 2, 3, and 5. All cationic compounds are cytotoxic in the two breast cancer cell lines tested, MCF7 and MDA-MB-231, and much better than cisplatin under the same experimental conditions. The cytotoxicity of the biotinylated compounds seems to be related with the Ru uptake by the cells expressing biotin receptors, indicating a potential mediated uptake. Indeed, a biotin-avidin study confirmed that the attachment of biotin to the organometallic fragment still allows biotin recognition by the protein. Therefore, the biotinylated compounds might be potent anticancer drugs as they show cytotoxic effect in breast cancer cells at low dose dependent on the compounds' uptake, induce cell death by apoptosis and inhibit the colony formation of cancer cells causing also less severe side effects in zebrafish.
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Affiliation(s)
- Leonor Côrte-Real
- Centro de Química Estrutural , Faculdade de Ciências da Universidade de Lisboa , Campo Grande , 1749-016 Lisboa , Portugal
| | - Brittany Karas
- Environmental and Occupational Health Sciences Institute , Rutgers University , 170 Frelinghuysen Road , Piscataway New Jersey 08854 , United States.,Department of Biochemistry and Microbiology , Rutgers University , 76 Lipman Drive , New Brunswick New Jersey 08854 , United States
| | - Ana Rita Brás
- Centro de Química Estrutural , Faculdade de Ciências da Universidade de Lisboa , Campo Grande , 1749-016 Lisboa , Portugal.,Centre of Molecular and Environmental Biology (CBMA), Department of Biology , University of Minho , Portugal. Campus de Gualtar , Braga 4710-057 , Portugal
| | - Adhan Pilon
- Centro de Química Estrutural , Faculdade de Ciências da Universidade de Lisboa , Campo Grande , 1749-016 Lisboa , Portugal
| | - Fernando Avecilla
- Grupo Xenomar, Centro de Investigacións Científicas Avanzadas (CICA), Departamento de Química, Facultade de Ciencias , Universidade da Coruña , Campus de A Coruña , 15071 A Coruña , Spain
| | - Fernanda Marques
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Te'cnico (C2TN/IST) , Universidade de Lisboa , Estrada Nacional 10 (km 139.7) , 2695-066 Bobadela LRS , Portugal
| | - Ana Preto
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology , University of Minho , Portugal. Campus de Gualtar , Braga 4710-057 , Portugal
| | - Brian T Buckley
- Environmental and Occupational Health Sciences Institute , Rutgers University , 170 Frelinghuysen Road , Piscataway New Jersey 08854 , United States
| | - Keith R Cooper
- Department of Biochemistry and Microbiology , Rutgers University , 76 Lipman Drive , New Brunswick New Jersey 08854 , United States
| | - Cathleen Doherty
- Environmental and Occupational Health Sciences Institute , Rutgers University , 170 Frelinghuysen Road , Piscataway New Jersey 08854 , United States
| | - M Helena Garcia
- Centro de Química Estrutural , Faculdade de Ciências da Universidade de Lisboa , Campo Grande , 1749-016 Lisboa , Portugal
| | - Andreia Valente
- Centro de Química Estrutural , Faculdade de Ciências da Universidade de Lisboa , Campo Grande , 1749-016 Lisboa , Portugal
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23
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Guo W, Deng L, Chen Z, Chen Z, Yu J, Liu H, Li T, Lin T, Chen H, Zhao M, Zhang L, Li G, Hu Y. Vitamin B12-conjugated sericin micelles for targeting CD320-overexpressed gastric cancer and reversing drug resistance. Nanomedicine (Lond) 2019; 14:353-370. [PMID: 30328369 DOI: 10.2217/nnm-2018-0321] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Affiliation(s)
- Weihong Guo
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Lizhi Deng
- PCFM Lab & GDHPPC Lab, School of Materials Science & Engineering, Sun Yat-sen University, Guangzhou 510275, PR China
| | - Zhaoyu Chen
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Zhian Chen
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Jiang Yu
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Hao Liu
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Tuanjie Li
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Tian Lin
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Hao Chen
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Mingli Zhao
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Liming Zhang
- PCFM Lab & GDHPPC Lab, School of Materials Science & Engineering, Sun Yat-sen University, Guangzhou 510275, PR China
| | - Guoxin Li
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Yanfeng Hu
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
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Scheffer D, Kulcsár G, Czömpöly T. Identification of Further Components of an Anticancer Defense System Composed of Small Molecules Present in the Serum. Cancer Biother Radiopharm 2019; 34:160-170. [PMID: 30648878 DOI: 10.1089/cbr.2018.2673] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND Earlier we assumed that small molecules selectively accumulated in cancer cells might have a role in a defense system capable of killing cancer cells. We reported earlier that an experimentally selected mixture of substances present in the serum ("active mixture," AM) shows a selective toxic effect in vitro and in vivo on various cancer cells. In this study we investigated additional compounds found in the serum to further expand our knowledge of this defense system. MATERIALS AND METHODS The cell proliferation was detected by WST-1 assay. The mRNA level of the examined genes was measured by quantitative real-time polymerase chain reaction. RESULTS We identified 34 additional compounds (l-amino acid metabolites, phenolic acids, d-amino acids, keto acids, etc.), which when applied in a per se nontoxic concentration are able to enhance the effect of AM. The combination of the mixture of these newly identified substances (new mixture, NM) with AM produced a significantly higher cancer cell growth inhibitory effect than NM or AM applied alone on HeLa, MCF-7, PC-3, Caco-2, HepG2, and 4T1 cancer cell lines, and more efficiently induced the expression of certain proapoptotic genes in HeLa cells. Any given combinations of the individual compounds of AM and NM always produced an increased effect compared with AM alone. CONCLUSIONS The newly identified compounds significantly enhance the anticancer effect of AM. The components of AM and NM together may form part of a defense system capable of killing cancer cells and are worthy of further investigation.
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Affiliation(s)
- Dalma Scheffer
- Cancer Research and Drug Development Center, Culevit Ltd., Pécs, Hungary
| | - Gyula Kulcsár
- Cancer Research and Drug Development Center, Culevit Ltd., Pécs, Hungary
| | - Tamás Czömpöly
- Cancer Research and Drug Development Center, Culevit Ltd., Pécs, Hungary
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Affiliation(s)
- Aleksandra J. Wierzba
- Institute of Organic ChemistryPolish Academy of Sciences Kasprzaka 44/52 01-224 Warsaw Poland
| | - Sidra Hassan
- Institute of Organic ChemistryPolish Academy of Sciences Kasprzaka 44/52 01-224 Warsaw Poland
| | - Dorota Gryko
- Institute of Organic ChemistryPolish Academy of Sciences Kasprzaka 44/52 01-224 Warsaw Poland
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Ventura G, Nardella MI, Panella A, Arnesano F, Calvano CD, Losito I, Palmisano F, Cataldi TRI. Structural Elucidation of Cisplatin and Hydrated cis-Diammineplatinum(II) Complex Conjugated with Cyanocobalamin by Liquid Chromatography with Electrospray Ionization-Mass Spectrometry and Multistage Mass Spectrometry. ACS OMEGA 2018; 3:12914-12922. [PMID: 31458014 PMCID: PMC6644602 DOI: 10.1021/acsomega.8b01879] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 09/25/2018] [Indexed: 06/09/2023]
Abstract
Pt(II)-based derivatives bearing a cyanocobalamin (CNCbl) unit were synthesized in aqueous solutions, and the reaction mixtures were examined by reversed-phase liquid chromatography with electrospray ionization and linear ion trap mass spectrometry (MS). Isotopic pattern analysis, multistage mass-spectra (MS/MS and MS3) interpretation, and differential isotopic labeling were used to establish the chemical composition and to suggest the chemical structures of reaction products. When cisplatin (cis-[PtCl2(NH3)2]) was used as a Pt(II) drug derivative, a coordination bond between diamminemonochloroplatinum(II) and the cyano group of CNCbl, in turn linked covalently to the vitamin Co(III) ion, occurred. The resulting conjugate with a CoIII-CN-PtII bridge was MS detected as a doubly positive charged ion with the prevailing isotopologue at m/z 810.26 (empirical formula [C63H95ClCoIIIN16O14PPt]2+). Likewise, a peak signal centered at m/z 811.26 was observed when 15N-labeled cisplatin cis-[PtCl2(15NH3)2] was used as Pt(II) complex, thus confirming the presence of both the cisplatin amino groups in the conjugate. A bifunctional conjugate was obtained between CNCbl and the cis-diamminediaquaplatinum(II), that is, cis-[Pt(NH3)2(H2O)2]2+; in this case, the planar coordination complex of Pt(II) was also involved in a covalent bond with the oxygen atom of one of the CNCbl amide moieties. The peak signal detected at m/z 792.26 (empirical formula [C63H94CoIIIN16O14PPt]2+) changed to m/z 793.26 when the labeled cis-[Pt(15NH3)2(H2O)2]2+ complex was adopted for conjugation. Comparison between MS/MS spectra allowed an extended structural characterization of both conjugates, as such or 15N-labeled. Two-dimensional heteronuclear (1H-15N) single quantum correlation NMR spectroscopy, applied to 15N-labeled conjugates, supported the hypotheses made on the Pt(II) coordination in both cases.
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Affiliation(s)
- Giovanni Ventura
- Dipartimento
di Chimica and Centro Interdipartimentale SMART, Università
degli Studi di Bari Aldo Moro, via Orabona 4, 70126 Bari, Italy
| | - Maria Incoronata Nardella
- Dipartimento
di Chimica and Centro Interdipartimentale SMART, Università
degli Studi di Bari Aldo Moro, via Orabona 4, 70126 Bari, Italy
| | - Andrea Panella
- Dipartimento
di Chimica and Centro Interdipartimentale SMART, Università
degli Studi di Bari Aldo Moro, via Orabona 4, 70126 Bari, Italy
| | - Fabio Arnesano
- Dipartimento
di Chimica and Centro Interdipartimentale SMART, Università
degli Studi di Bari Aldo Moro, via Orabona 4, 70126 Bari, Italy
| | - Cosima Damiana Calvano
- Dipartimento
di Chimica and Centro Interdipartimentale SMART, Università
degli Studi di Bari Aldo Moro, via Orabona 4, 70126 Bari, Italy
| | - Ilario Losito
- Dipartimento
di Chimica and Centro Interdipartimentale SMART, Università
degli Studi di Bari Aldo Moro, via Orabona 4, 70126 Bari, Italy
| | - Francesco Palmisano
- Dipartimento
di Chimica and Centro Interdipartimentale SMART, Università
degli Studi di Bari Aldo Moro, via Orabona 4, 70126 Bari, Italy
| | - Tommaso R. I. Cataldi
- Dipartimento
di Chimica and Centro Interdipartimentale SMART, Università
degli Studi di Bari Aldo Moro, via Orabona 4, 70126 Bari, Italy
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27
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Kozyraki R, Cases O. Cubilin, the Intrinsic Factor-Vitamin B12 Receptor in Development and Disease. Curr Med Chem 2018; 27:3123-3150. [PMID: 30295181 DOI: 10.2174/0929867325666181008143945] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 08/11/2018] [Accepted: 08/21/2018] [Indexed: 12/29/2022]
Abstract
Gp280/Intrinsic factor-vitamin B12 receptor/Cubilin (CUBN) is a large endocytic receptor serving multiple functions in vitamin B12 homeostasis, renal reabsorption of protein or toxic substances including albumin, vitamin D-binding protein or cadmium. Cubilin is a peripheral membrane protein consisting of 8 Epidermal Growth Factor (EGF)-like repeats and 27 CUB (defined as Complement C1r/C1s, Uegf, BMP1) domains. This structurally unique protein interacts with at least two molecular partners, Amnionless (AMN) and Lrp2/Megalin. AMN is involved in appropriate plasma membrane transport of Cubilin whereas Lrp2 is essential for efficient internalization of Cubilin and its ligands. Observations gleaned from animal models with Cubn deficiency or human diseases demonstrate the importance of this protein. In this review addressed to basic research and medical scientists, we summarize currently available data on Cubilin and its implication in renal and intestinal biology. We also discuss the role of Cubilin as a modulator of Fgf8 signaling during embryonic development and propose that the Cubilin-Fgf8 interaction may be relevant in human pathology, including in cancer progression, heart or neural tube defects. We finally provide experimental elements suggesting that some aspects of Cubilin physiology might be relevant in drug design.
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Affiliation(s)
- Renata Kozyraki
- INSERM UMRS 1138, Centre de Recherche des Cordeliers, Paris-Diderot University, Paris, France
| | - Olivier Cases
- INSERM UMRS 1138, Centre de Recherche des Cordeliers, Paris-Diderot University, Paris, France
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29
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Wang Y, Yue C, Fang J, Gong L, Lian M, Wang R, Feng L, Ma H, Ma Z, Liu H. Transcobalamin I: a novel prognostic biomarker of neoadjuvant chemotherapy in locally advanced hypopharyngeal squamous cell cancers. Onco Targets Ther 2018; 11:4253-4261. [PMID: 30100732 PMCID: PMC6065467 DOI: 10.2147/ott.s166514] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Background Hypopharyngeal squamous cell carcinoma (HPSCC) is an aggressive head and neck squamous cell carcinoma with poor prognosis. Neoadjuvant chemotherapy (NACT) followed by concurrent chemoradiotherapy could provide better efficacy in HPSCC treatment. Identification of predictive biomarkers is critically needed to improve selection of patients who derive the most benefit from NACT. The aim of this study was to investigate whether transcobalamin I (TCN1) could be a novel predictive biomarker for NACT in HPSCC. Methods We collected biopsy specimens from 102 patients with primary locally advanced HPSCC. Messenger RNA (mRNA) and protein expression levels of TCN1 were analyzed using quantitative polymerase chain reaction and immunohistochemistry, respectively. The relationship between TCN1 expression, chemotherapy sensitivity, and clinical outcome was assessed using univariate Kaplan-Meier survival analyses and multivariate analysis with covariate adjustments. Furthermore, we knocked down TCN1 by small interfering RNA (siRNA) in HPSCC cell FaDu, tested the effects of TCN1 knockdown on cisplatin toxicity by MTT assay, and detected cisplatin-induced apoptosis by Western blotting. Results TCN1 expression was significantly lower in NACT-sensitive patients than nonsensitive patients at protein level (p=0.013) and mRNA level (p<0.001), indicating that low TCN1 expression predicts better NACT treatment response. Furthermore, TCN1 was an independent prognostic biomarker for both overall survival (p=0.047) and disease-free survival (p=0.05) in advanced HPSCC patients. In addition, in vitro experiments showed that genetic silencing of TCN1 using siRNA sensitized FaDu cells to cisplatin treatment with increased cell apoptosis. Conclusion Low expression of TCN1 might be a novel prognostic biomarker for predicting NACT sensitivity and clinical outcome in local advanced HPSCC patients.
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Affiliation(s)
- Ying Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, People's Republic of China, .,Department of Otolaryngology, Liaocheng People's Hospital and Liaocheng Ophthalmological and Otolaryngological Hospital, Liaocheng Clinical School of Taishan Medical University, Liaocheng, Shandong, People's Republic of China
| | - Changli Yue
- Department of Pathology, Beijing Key Laboratory of Head and Neck Molecular Diagnostic Pathology, Beijing Tongren Hospital, Capital Medical University, Beijing, People's Republic of China,
| | - Jugao Fang
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, People's Republic of China, .,Key Laboratory of Otorhinolaryngology Head and Neck Surgery, Ministry of Education, Beijing Institute of Otorhinolaryngology, Beijing, People's Republic of China, .,Beijing Key Laboratory of Head and Neck Molecular Diagnostic Pathology, Beijing, People's Republic of China,
| | - Lili Gong
- Department of Otolaryngology, Liaocheng People's Hospital and Liaocheng Ophthalmological and Otolaryngological Hospital, Liaocheng Clinical School of Taishan Medical University, Liaocheng, Shandong, People's Republic of China
| | - Meng Lian
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, People's Republic of China,
| | - Ru Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, People's Republic of China,
| | - Ling Feng
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, People's Republic of China,
| | - Hongzhi Ma
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, People's Republic of China,
| | - Zhihong Ma
- Department of Pathology, Beijing Key Laboratory of Head and Neck Molecular Diagnostic Pathology, Beijing Tongren Hospital, Capital Medical University, Beijing, People's Republic of China,
| | - Honggang Liu
- Department of Pathology, Beijing Key Laboratory of Head and Neck Molecular Diagnostic Pathology, Beijing Tongren Hospital, Capital Medical University, Beijing, People's Republic of China,
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30
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Abstract
PURPOSE To image the uptake of cobalamin (Cbl) within malignant breast tumors in vivo. PROCEDURES Prior to surgery 20 female patients with clinically suspected breast tumors were intravenously administered 0.25 μg of an In-111 labeled 5-deoxyadenosylcobalamin (AC) analog ([111In]AC) and sequentially imaged with whole-body planar (WBP) and single-photon emission computed tomography (SPECT) between 2-5 h and 20-24 h post-injection (P.I.). The tumor to background (T/B) ratio for [111In]AC in breast tumors at 2-5 h was correlated to its expression of estrogen (ER), progesterone (PR), and human epidermal growth factor 2 (HER2) receptors. Subsequent pulse chase (PC) experiments in nude mice burdened with the MDA-MB-231 triple-negative (TN) breast tumor xenograft measured the effect that pulses of AC or dexamethasone (DEX) had on [111In]AC uptake in both normal murine tissue and the TN breast tumor. RESULTS The mean [111In]AC T/B ratio of the patients' 18 resected tumors was 5.8. Comparing ER- and PR-positive tumors (n = 11) to TN and HER2-positive tumors (n = 7), the mean [111In]AC T/B ratios at 2-5 h P.I. were 3.2 (range 1.8-5.6) and 10.4 (range 3.3-22.5), respectively. Pulses of 2.0 μg of AC at 2, 8, or 24 h; or 40.0 μg of DEX at 24 h prior to injecting 0.5 μg of [111In]AC, increased mean tracer uptake in the MDA-MB-231 tumors by 26.4, 71.5, 92.6, and 49.1 %, respectively. Only the 2- and 24-h PC intervals concomitantly suppressed [111In]AC uptake in normal murine tissue while enhancing [111In]AC uptake in MDA-MB-231 tumors. CONCLUSION The uptake of Cbl within malignant breast tumors can be imaged clinically. Cbl uptake is greatest in TN and HER2-positive breast tumors. A solitary bolus of AC or DEX increases the [111In]AC uptake within a breast tumor in vivo. Investigating the cytogenetic mechanisms controlling the endocytosis of Cbl in malignant breast tumors is warranted.
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31
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Okoh OA, Klahn P. Trimethyl Lock: A Multifunctional Molecular Tool for Drug Delivery, Cellular Imaging, and Stimuli-Responsive Materials. Chembiochem 2018; 19:1668-1694. [PMID: 29888433 DOI: 10.1002/cbic.201800269] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Indexed: 12/13/2022]
Abstract
Trimethyl lock (TML) systems are based on ortho-hydroxydihydrocinnamic acid derivatives displaying increased lactonization reactivity owing to unfavorable steric interactions of three pendant methyl groups, and this leads to the formation of hydrocoumarins. Protection of the phenolic hydroxy function or masking of the reactivity as benzoquinone derivatives prevents lactonization and provides a trigger for controlled release of molecules attached to the carboxylic acid function through amides, esters, or thioesters. Their easy synthesis and possible chemical adaption to several different triggers make TML a highly versatile module for the development of drug-delivery systems, prodrug approaches, cell-imaging tools, molecular tools for supramolecular chemistry, as well as smart stimuliresponsive materials.
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Affiliation(s)
- Okoh Adeyi Okoh
- Institute for Organic Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106, Braunschweig, Germany
| | - Philipp Klahn
- Institute for Organic Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106, Braunschweig, Germany
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32
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Lawrence AD, Nemoto-Smith E, Deery E, Baker JA, Schroeder S, Brown DG, Tullet JMA, Howard MJ, Brown IR, Smith AG, Boshoff HI, Barry CE, Warren MJ. Construction of Fluorescent Analogs to Follow the Uptake and Distribution of Cobalamin (Vitamin B 12) in Bacteria, Worms, and Plants. Cell Chem Biol 2018; 25:941-951.e6. [PMID: 29779954 DOI: 10.1016/j.chembiol.2018.04.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 01/18/2018] [Accepted: 04/11/2018] [Indexed: 12/25/2022]
Abstract
Vitamin B12 is made by only certain prokaryotes yet is required by a number of eukaryotes such as mammals, fish, birds, worms, and Protista, including algae. There is still much to learn about how this nutrient is trafficked across the domains of life. Herein, we describe ways to make a number of different corrin analogs with fluorescent groups attached to the main tetrapyrrole-derived ring. A further range of analogs were also constructed by attaching similar fluorescent groups to the ribose ring of cobalamin, thereby generating a range of complete and incomplete corrinoids to follow uptake in bacteria, worms, and plants. By using these fluorescent derivatives we were able to demonstrate that Mycobacterium tuberculosis is able to acquire both cobyric acid and cobalamin analogs, that Caenorhabditis elegans takes up only the complete corrinoid, and that seedlings of higher plants such as Lepidium sativum are also able to transport B12.
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Affiliation(s)
- Andrew D Lawrence
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | - Emi Nemoto-Smith
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK; National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20850, USA
| | - Evelyne Deery
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | - Joseph A Baker
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | - Susanne Schroeder
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | - David G Brown
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | | | - Mark J Howard
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | - Ian R Brown
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | - Alison G Smith
- Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EA, UK
| | - Helena I Boshoff
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20850, USA
| | - Clifton E Barry
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20850, USA
| | - Martin J Warren
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK.
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33
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Kuda-Wedagedara AW, Workinger JL, Nexo E, Doyle RP, Viola-Villegas N. 89Zr-Cobalamin PET Tracer: Synthesis, Cellular Uptake, and Use for Tumor Imaging. ACS OMEGA 2017; 2:6314-6320. [PMID: 29104950 PMCID: PMC5664145 DOI: 10.1021/acsomega.7b01180] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Accepted: 09/18/2017] [Indexed: 06/07/2023]
Abstract
Vitamin B12, or cobalamin (Cbl), is an essential nutrient. Acquisition, transport, and cellular internalization of Cbl are dependent on specific binding proteins and associated receptors. The circulating transport protein transcobalamin (TC) promotes cellular uptake via binding to specific receptors such as CD320, a receptor upregulated in several cancer cell lines. In this study, we report the successful synthesis of 89Zirconium-labeled Cbl that was derivatized with desferrioxamine (89Zr-Cbl). We document the purity of the tracer and its binding to TC compared with that of unmodified cyano-Cbl (CN-Cbl). In vitro studies employing the CD320 receptor-positive breast cancer cell line MDA-MB-453 showed a 6- to 10-fold greater uptake of 89Zr-Cbl when compared with the uptake in the presence of 200-fold excess of CN-Cbl at 37 °C. We used nude mice with MDA-MB-453 tumors to study the feasibility of employing the tracer to visualize CD320 positive tumors. In vivo positron emission tomography images displayed a clear visualization of the tumor with 1.42 ± 0.48 %ID/g uptake (n = 3) at 4 h after injection (p.i.) with the tracer retained at 48 h p.i. Ex vivo biodistribution studies using 89Zr-Cbl exhibited the highest uptake in kidney and liver at 48 h p.i. Results document the feasibility of synthesizing a Cbl-based tracer suitable for both in vivo and ex vivo studies of Cbl trafficking and with the potential to visualize tumors expressing TC receptors, such as CD320.
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Affiliation(s)
- Akhila
N. W. Kuda-Wedagedara
- Department
of Oncology, Karmanos Cancer Institute, Wayne State University, Detroit, Michigan 48202, United States
| | - Jayme L. Workinger
- Department
of Chemistry, Syracuse University, 111 College Place, Syracuse, New York 13102, United States
| | - Ebba Nexo
- Department
of Clinical Biochemistry and Institute of Clinical Medicine, Aarhus University Hospital, Aarhus 8000, Denmark
| | - Robert P. Doyle
- Department
of Chemistry, Syracuse University, 111 College Place, Syracuse, New York 13102, United States
- Department
of Medicine, State University of New York
Upstate Medical University, Syracuse, New York 13102, United States
| | - Nerissa Viola-Villegas
- Department
of Oncology, Karmanos Cancer Institute, Wayne State University, Detroit, Michigan 48202, United States
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34
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Mutti E, Hunger M, Fedosov S, Nexo E, Kräutler B. Organometallic DNA-B 12 Conjugates as Potential Oligonucleotide Vectors: Synthesis and Structural and Binding Studies with Human Cobalamin-Transport Proteins. Chembiochem 2017; 18:2280-2291. [PMID: 28881087 DOI: 10.1002/cbic.201700472] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Indexed: 12/14/2022]
Abstract
The synthesis and structural characterization of Co-(dN)25 -Cbl (Cbl: cobalamin; dN: deoxynucleotide) and Co-(dN)39 -Cbl, which are organometallic DNA-B12 conjugates with single DNA strands consisting of 25 and 39 deoxynucleotides, respectively, and binding studies of these two DNA-Cbl conjugates to three homologous human Cbl transporting proteins, transcobalamin (TC), intrinsic factor (IF), and haptocorrin (HC), are reported. This investigation tests the suitability of such DNA-Cbls for the task of eventual in vivo oligonucleotide delivery. The binding of DNA-Cbl to TC, IF, and HC was investigated in competition with either a fluorescent Cbl derivative and Co-(dN)25 -Cbl, or radiolabeled vitamin B12 (57 Co-CNCbl) and Co-(dN)25 -Cbl or Co-(dN)39 -Cbl. Binding of the new DNA-Cbl conjugates was fast and tight with TC, but poorer with HC and IF, which extends a similar original finding with the simpler DNA-Cbl, Co-(dN)18 -Cbl. The contrasting affinities of TC versus IF and HC for the DNA-Cbl conjugates are rationalized herein by a stepwise mechanism of Cbl binding. Critical contributions to overall affinity result from gradual conformational adaptations of the Cbl-binding proteins to the DNA-Cbl, which is first bound to the respective β domains. This transition is fast with TC, but slow with IF and HC, with which weaker binding results. The invariably tight interaction of the DNA-Cbl conjugates with TC makes the Cbl moiety a potential natural vector for the specific delivery of oligonucleotide loads from the blood into cells.
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Affiliation(s)
- Elena Mutti
- Department of Clinical Biochemistry, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200, Aarhus N, Denmark
| | - Miriam Hunger
- Institute of Organic Chemistry, Center for Molecular Biosciences (CMBI), University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria
| | - Sergey Fedosov
- Department of Molecular Biology and Genetics, Aarhus University, Science Park Gustav WiedsVej 10C, 8000, Aarhus C, Denmark
| | - Ebba Nexo
- Department of Clinical Biochemistry, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200, Aarhus N, Denmark
| | - Bernhard Kräutler
- Institute of Organic Chemistry, Center for Molecular Biosciences (CMBI), University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria
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35
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Structure of the human transcobalamin beta domain in four distinct states. PLoS One 2017; 12:e0184932. [PMID: 28910388 PMCID: PMC5599065 DOI: 10.1371/journal.pone.0184932] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 09/02/2017] [Indexed: 11/19/2022] Open
Abstract
Vitamin B12 (cyanocobalamin, CNCbl) is an essential cofactor-precursor for two biochemical reactions in humans. When ingested, cobalamins (Cbl) are transported via a multistep transport system into the bloodstream, where the soluble protein transcobalamin (TC) binds Cbl and the complex is taken up into the cells via receptor mediated endocytosis. Crystal structures of TC in complex with CNCbl have been solved previously. However, the initial steps of holo-TC assembly have remained elusive. Here, we present four crystal structures of the beta domain of human TC (TC-beta) in different substrate-bound states. These include the apo and CNCbl-bound states, providing insight into the early steps of holo-TC assembly. We found that in vitro assembly of TC-alpha and TC-beta to a complex was Cbl-dependent. We also determined the structure of TC-beta in complex with cobinamide (Cbi), an alternative substrate, shedding light on the specificity of TC. We finally determined the structure of TC-beta in complex with an inhibitory antivitamin B12 (anti-B12). We used this structure to model the binding of anti-B12 into full-length holo-TC and could rule out that the inhibitory function of anti-B12 was based on an inability to form a functional complex with TC.
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36
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Valdovinos HF, Hernandez R, Graves S, Ellison PA, Barnhart TE, Theuer CP, Engle JW, Cai W, Nickles RJ. Cyclotron production and radiochemical separation of 55Co and 58mCo from 54Fe, 58Ni and 57Fe targets. Appl Radiat Isot 2017; 130:90-101. [PMID: 28946101 DOI: 10.1016/j.apradiso.2017.09.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 08/28/2017] [Accepted: 09/04/2017] [Indexed: 11/18/2022]
Abstract
This work presents the production with a cyclotron of the positron emitter 55Co via the 54Fe(d,n) and 58Ni(p,α) reactions and the Auger electron emitter 58mCo via the 57Fe(d,n) reaction after high current (40μA p and 60μA d) irradiation on electroplated targets. High specific activity radionuclides (up to 55.6 GBq/μmol 55Co and 31.8GBq/μmol 58mCo) with high radionuclidic purity (99.995% 55Co from 54Fe, 98.8% 55Co from 58Ni, and 98.7% 58mCo from 57Fe at end of bombardment, EoB), in high activity concentration (final separated radionuclide in < 0.6mL) and with almost quantitative overall activity separation yield (> 92%) were obtained after processing of the irradiated targets with novel radiochemical separation methods based on HCl dissolution and the resin N,N,N',N'-tetrakis-2-ethylhexyldiglycolamide (DGA, branched). One hour long irradiations using 38-65, 110-214 and 59-78mg of enriched 54Fe (99.93%), 58Ni (99.48%) and 57Fe (95.06%), respectively, electroplated over a 1.0cm2 surface, yielded 582 ± 66MBq 55Co, 372 ± 14MBq 55Co and 810 ± 186MBq 58mCo, respectively, decay corrected to EoB. The separation methods allow for the recovery of the costly enriched target materials, which were reconstituted into metallic targets after novel electroplating methods, with an overall recycling efficiency of 93 ± 4% for iron. The produced radionuclides were used to radiolabel the angiogenesis marker antibody TRC105 conjugated to the chelator NOTA as a demonstration of their quality.
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Affiliation(s)
- H F Valdovinos
- Medical Physics Department, University of Wisconsin-Madison, Madison, WI, USA.
| | - R Hernandez
- Department of Radiology, University of Wisconsin, Madison, WI, USA
| | - S Graves
- Medical Physics Department, University of Wisconsin-Madison, Madison, WI, USA
| | - P A Ellison
- Medical Physics Department, University of Wisconsin-Madison, Madison, WI, USA
| | - T E Barnhart
- Medical Physics Department, University of Wisconsin-Madison, Madison, WI, USA
| | - C P Theuer
- TRACON Pharmaceuticals, Inc., San Diego, CA, USA
| | - J W Engle
- Medical Physics Department, University of Wisconsin-Madison, Madison, WI, USA
| | - W Cai
- Medical Physics Department, University of Wisconsin-Madison, Madison, WI, USA; Department of Radiology, University of Wisconsin, Madison, WI, USA; University of Wisconsin Carbone Cancer Center, Madison, WI, USA
| | - R J Nickles
- Medical Physics Department, University of Wisconsin-Madison, Madison, WI, USA
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37
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Dutta J, Naicker T, Ebenhan T, Kruger HG, Arvidsson PI, Govender T. Synthetic approaches to radiochemical probes for imaging of bacterial infections. Eur J Med Chem 2017; 133:287-308. [DOI: 10.1016/j.ejmech.2017.03.060] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 03/23/2017] [Accepted: 03/24/2017] [Indexed: 02/08/2023]
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38
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Lee YY, Wei YC, Tian YF, Sun DP, Sheu MJ, Yang CC, Lin LC, Lin CY, Hsing CH, Li WS, Li CF, Hsieh PL, Lin CY. Overexpression of Transcobalamin 1 is an Independent Negative Prognosticator in Rectal Cancers Receiving Concurrent Chemoradiotherapy. J Cancer 2017; 8:1330-1337. [PMID: 28638446 PMCID: PMC5479237 DOI: 10.7150/jca.18274] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 03/06/2017] [Indexed: 12/27/2022] Open
Abstract
Objective: Neoadjuvant concurrent chemoradiotherapy (CCRT) is an increasingly common therapeutic strategy for locally advanced rectal cancer, but stratification of risk and final outcomes remain a major challenge. Transcobalamin 1 (TCN1), a vitamin B12 (cobalamin)-binding protein, regulates cobalamin homeostasis. High expression of TCN1 have been reported in neoplasms such as breast cancer and hepatocellular carcinoma. However, little is known about the relevance of TCN1 to rectal cancer receiving CCRT. This study examined the predictive and prognostic impact of TCN1 expression in patients with rectal cancer following neoadjuvant CCRT. Methods: Through data mining from a published transcriptome of rectal cancers (GSE35452), we identified upregulation of TCN1 gene as the most significantly predicted poor response to CCRT among ion transport-related genes (GO:0006811). We evaluated TCN1 immunohistochemistry and performed an H-score analysis on endoscopic biopsy specimens from 172 rectal cancer patients receiving neoadjuvant CCRT followed by curative surgery. Expression levels of TCN1 were further correlated with clinicopathologic features, therapeutic response, tumor regression grade (TRG) and survivals including metastasis-free survival (MeFS), disease-specific survival (DSS) and recurrent-free survival (LRFS). Results: TCN1 overexpression was significantly related to advanced post-treatment tumor (T3, T4; p<0.001) and nodal status (N1, N2; p<0.001), vascular invasion (p=0.003) and inferior tumor regression grade (p < 0.001). In survival analyses, TCN1 overexpression was significantly associated with shorter DSS (p<0.0001), MeFS (p=0.0002) and LRFS (p=0.0001). Furthermore, it remained an independent prognosticator of worse DSS (p=0.002, hazard ratio=3.344), MeFS (p=0.021, hazard ratio=3.015) and LRFS (p=0.037, hazard ratio=3.037) in the multivariate comparison. Conclusion: Overexpression of TCN1 is associated with poor therapeutic response and adverse outcomes in rectal cancer patients receiving CCRT, justifying the potential prognostic value of TCN1 in rectal cancer receiving CCRT.
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Affiliation(s)
- Yi-Ying Lee
- Department of Pathology, Chi Mei Medical Center, Liouying, Tainan, Taiwan
- Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Yu-Ching Wei
- Department of Pathology, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung, Taiwan
| | - Yu-Feng Tian
- Division of General Surgery, Department of Surgery, Chi Mei Medical Center, Tainan, Taiwan
- Department of Health & Nutrition, Chia Nan University of Pharmacy and Science, Tainan, Taiwan
| | - Ding-Ping Sun
- Division of General Surgery, Department of Surgery, Chi Mei Medical Center, Tainan, Taiwan
- Department of Pharmacy, Chia Nan University of Pharmacy and Science, Tainan, Taiwan
| | - Ming-Jen Sheu
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Chi Mei Medical Center, Tainan, Taiwan
| | - Ching-Chieh Yang
- Department of Radiation Oncology, Chi Mei Medical Center, Tainan, Taiwan
| | - Li-Ching Lin
- Department of Radiation Oncology, Chi Mei Medical Center, Tainan, Taiwan
| | - Chen-Yi Lin
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Chi Mei Medical Center, Tainan, Taiwan
| | - Chung-Hsi Hsing
- Department of Anesthesiology, Chi Mei Medical Center, Tainan, Taiwan
| | - Wan-Shan Li
- Department of Pathology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chien-Feng Li
- Department of Pathology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Pathology, Chi Mei Medical Center, Tainan, Taiwan
- National Institute of Cancer Research, National Health Research Institutes, Tainan, Taiwan
- Department of Biotechnology, Southern Taiwan University of Science and Technology, Tainan, Taiwan
| | - Pei-Ling Hsieh
- Department of Medical Image, Chi Mei Medical Center, Tainan, Taiwan
| | - Ching-Yih Lin
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Chi Mei Medical Center, Tainan, Taiwan
- Department of Leisure, Recreation, and Tourism Management, Southern Taiwan
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39
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Kamkaew A, Fu N, Cai W, Burgess K. Novel Small Molecule Probes for Metastatic Melanoma. ACS Med Chem Lett 2017; 8:179-184. [PMID: 28197308 PMCID: PMC5304293 DOI: 10.1021/acsmedchemlett.6b00368] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 11/29/2016] [Indexed: 12/19/2022] Open
Abstract
Actively targeting probe 1b, an unsymmetrical bivalent dipeptide mimic, selectively bound melanoma over healthy skin tissue in histological samples from patients and Sinclair swine. Modifications to 1b gave agents 2-4 that contain a near-IR aza-BODIPY fluor. Contrary to our expectations, symmetrical probe 3 gave the highest melanoma-to-healthy skin selectivity in histochemistry and experiments with live cells; this was surprising because 2, not 3, is unsymmetrical like the original lead 1. Optical imaging of 3 in a mouse melanoma model failed to show tumor accumulation in vivo, but the probe did selectively accumulate in the tumor (some in lung and less in the liver) as proven by analysis of the organs post mortem.
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Affiliation(s)
- Anyanee Kamkaew
- Department of Chemistry, Texas A & M University, Box 30012, College Station, Texas 77842, United States
- Department of Radiology, University of
Wisconsin−Madison, Madison, Wisconsin 53705, United States
| | - Nanyan Fu
- Department of Chemistry, Texas A & M University, Box 30012, College Station, Texas 77842, United States
- Department of Chemistry, Fuzhou University, Fuzhou 350116, P. R. China
| | - Weibo Cai
- Department of Radiology, University of
Wisconsin−Madison, Madison, Wisconsin 53705, United States
- University
of Wisconsin Carbone Cancer Center, University
of Wisconsin−Madison, Madison, Wisconsin 53705, United States
| | - Kevin Burgess
- Department of Chemistry, Texas A & M University, Box 30012, College Station, Texas 77842, United States
- Department of Pharmacology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
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40
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Pettenuzzo A, Pigot R, Ronconi L. Vitamin B12-Metal Conjugates for Targeted Chemotherapy and Diagnosis: Current Status and Future Prospects. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601217] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Andrea Pettenuzzo
- School of Chemistry; National University of Ireland Galway; University Road H91 CF50 Galway Ireland
| | - Rebecca Pigot
- School of Chemistry; National University of Ireland Galway; University Road H91 CF50 Galway Ireland
| | - Luca Ronconi
- School of Chemistry; National University of Ireland Galway; University Road H91 CF50 Galway Ireland
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41
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Rossier J, Hauser D, Kottelat E, Rothen-Rutishauser B, Zobi F. Organometallic cobalamin anticancer derivatives for targeted prodrug delivery via transcobalamin-mediated uptake. Dalton Trans 2017; 46:2159-2164. [DOI: 10.1039/c6dt04443c] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
We report the synthesis and study of new water-soluble vitamin B12 prodrugs bearing metal complexes at the β-upper side of the cobalt center for targeted prodrug delivery.
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Affiliation(s)
- Jeremie Rossier
- Department of Chemistry
- University of Fribourg
- 1700 Fribourg
- Switzerland
| | | | - Emmanuel Kottelat
- Department of Chemistry
- University of Fribourg
- 1700 Fribourg
- Switzerland
| | | | - Fabio Zobi
- Department of Chemistry
- University of Fribourg
- 1700 Fribourg
- Switzerland
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42
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Lodowski P, Ciura K, Toda MJ, Jaworska M, Kozlowski PM. Photodissociation of ethylphenylcobalamin antivitamin B12. Phys Chem Chem Phys 2017; 19:30310-30315. [DOI: 10.1039/c7cp06589b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Biologically active forms of cobalamins are crucial cofactors in biochemical reactions and these metabolites can be inhibited by their structurally similar analogues known as antivitamins B12.
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Affiliation(s)
- Piotr Lodowski
- Department of Theoretical Chemistry
- Institute of Chemistry
- University of Silesia in Katowice
- PL-40 006 Katowice
- Poland
| | - Karolina Ciura
- Department of Theoretical Chemistry
- Institute of Chemistry
- University of Silesia in Katowice
- PL-40 006 Katowice
- Poland
| | - Megan J. Toda
- Department of Chemistry
- University of Louisville
- Louisville
- USA
| | - Maria Jaworska
- Department of Theoretical Chemistry
- Institute of Chemistry
- University of Silesia in Katowice
- PL-40 006 Katowice
- Poland
| | - Pawel M. Kozlowski
- Department of Chemistry
- University of Louisville
- Louisville
- USA
- Department of Food Sciences
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43
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Ventura G, Arnesano F, Calvano CD, Palmisano F, Cataldi TRI. Cyanocobalamin conjugates of cisplatin and diaminocyclohexane-platinum(ii): matrix-assisted laser desorption ionization mass spectrometry characterization using 4-chloro-α-cyanocinnamic acid as the matrix. RSC Adv 2017. [DOI: 10.1039/c7ra08588e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
cis-Diamminedichloroplatinum(ii), also known as cisplatin, is a widely used chemotherapeutic agent to treat several malignant tumours, but unfortunately it causes serious side effects, especially nausea, vomiting and nephrotoxicity.
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Affiliation(s)
- G. Ventura
- Dipartimento di Chimica
- Università degli Studi di Bari Aldo Moro
- 70126 Bari
- Italy
| | - F. Arnesano
- Dipartimento di Chimica
- Università degli Studi di Bari Aldo Moro
- 70126 Bari
- Italy
- Centro Interdipartimentale SMART
| | - C. D. Calvano
- Dipartimento di Chimica
- Università degli Studi di Bari Aldo Moro
- 70126 Bari
- Italy
- Centro Interdipartimentale SMART
| | - F. Palmisano
- Dipartimento di Chimica
- Università degli Studi di Bari Aldo Moro
- 70126 Bari
- Italy
- Centro Interdipartimentale SMART
| | - T. R. I. Cataldi
- Dipartimento di Chimica
- Università degli Studi di Bari Aldo Moro
- 70126 Bari
- Italy
- Centro Interdipartimentale SMART
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44
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Tran MTQ, Stürup S, Lambert IH, Gammelgaard B, Furger E, Alberto R. Cellular uptake of metallated cobalamins. Metallomics 2016; 8:298-304. [PMID: 26739575 DOI: 10.1039/c5mt00272a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Cellular uptake of vitamin B12-cisplatin conjugates was estimated via detection of their metal constituents (Co, Pt, and Re) by inductively coupled plasma mass spectrometry (ICP-MS). Vitamin B12 (cyano-cob(iii)alamin) and aquo-cob(iii)alamin [Cbl-OH2](+), which differ in the β-axial ligands (CN(-) and H2O, respectively), were included as control samples. The results indicated that B12 derivatives delivered cisplatin to both cellular cytosol and nuclei with an efficiency of one third compared to the uptake of free cisplatin cis-[Pt(II)Cl2(NH3)2]. In addition, uptake of charged B12 derivatives including [Cbl-OH2](+), [{Co}-CN-{cis-PtCl(NH3)2}](+), [{Re}-{Co}-CN-{cis-PtCl(NH3)2}](+), and [{Co}-CN-{trans-Pt(Cyt)(NH3)2}](2+) (Cyt = cytarabin) was high compared to neutral B12, which implied the existence of an additional internalization pathway for charged B12 vitamin analogs. The affinities of the charged B12 derivatives to the B12 transporters HC, IF and TC were similar to that of native vitamin B12.
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Affiliation(s)
- Mai Thanh Quynh Tran
- Institute of Inorganic Chemistry, University of Zürich, Winterthurerstr. 190, 8057 Zürich, Switzerland.
| | - Stefan Stürup
- Department of Pharmacy, Faculty of Health Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark.
| | - Ian Henry Lambert
- Department of Biology, University of Copenhagen, Universitetsparken 13, 2100 Copenhagen, Denmark
| | - Bente Gammelgaard
- Department of Pharmacy, Faculty of Health Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark.
| | - Evelyne Furger
- Center for Radiopharmaceutical Science, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
| | - Roger Alberto
- Institute of Inorganic Chemistry, University of Zürich, Winterthurerstr. 190, 8057 Zürich, Switzerland.
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45
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Zhao H, Ruberu K, Li H, Garner B. Cell Type-Specific Modulation of Cobalamin Uptake by Bovine Serum. PLoS One 2016; 11:e0167044. [PMID: 27893837 PMCID: PMC5125665 DOI: 10.1371/journal.pone.0167044] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Accepted: 11/07/2016] [Indexed: 12/04/2022] Open
Abstract
Tracking cellular 57Co-labelled cobalamin (57Co-Cbl) uptake is a well-established method for studying Cbl homeostasis. Previous studies established that bovine serum is not generally permissive for cellular Cbl uptake when used as a supplement in cell culture medium, whereas supplementation with human serum promotes cellular Cbl uptake. The underlying reasons for these differences are not fully defined. In the current study we address this question. We extend earlier observations by showing that fetal calf serum inhibits cellular 57Co-Cbl uptake by HT1080 cells (a fibrosarcoma-derived fibroblast cell line). Furthermore, we discovered that a simple heat-treatment protocol (95°C for 10 min) ameliorates this inhibitory activity for HT1080 cell 57Co-Cbl uptake. We provide evidence that the very high level of haptocorrin in bovine serum (as compared to human serum) is responsible for this inhibitory activity. We suggest that bovine haptocorrin competes with cell-derived transcobalamin for Cbl binding, and that cellular Cbl uptake may be minimised in the presence of large amounts of bovine haptocorrin that are present under routine in vitro cell culture conditions. In experiments conducted with AG01518 cells (a neonatal foreskin-derived fibroblast cell line), overall cellular 57Co-Cbl uptake was 86% lower than for HT1080 cells, cellular TC production was below levels detectable by western blotting, and heat treatment of fetal calf serum resulted in only a modest increase in cellular 57Co-Cbl uptake. We recommend a careful assessment of cell culture protocols should be conducted in order to determine the potential benefits that heat-treated bovine serum may provide for in vitro studies of mammalian cell lines.
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Affiliation(s)
- Hua Zhao
- Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, NSW, Australia
- School of Biological Sciences, University of Wollongong, Wollongong, NSW, Australia
| | - Kalani Ruberu
- Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, NSW, Australia
- School of Biological Sciences, University of Wollongong, Wollongong, NSW, Australia
| | - Hongyun Li
- Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, NSW, Australia
- School of Biological Sciences, University of Wollongong, Wollongong, NSW, Australia
| | - Brett Garner
- Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, NSW, Australia
- School of Biological Sciences, University of Wollongong, Wollongong, NSW, Australia
- * E-mail:
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46
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Baldoni D, Waibel R, Bläuenstein P, Galli F, Iodice V, Signore A, Schibli R, Trampuz A. Evaluation of a Novel Tc-99m Labelled Vitamin B12 Derivative for Targeting Escherichia coli and Staphylococcus aureus In Vitro and in an Experimental Foreign-Body Infection Model. Mol Imaging Biol 2016; 17:829-37. [PMID: 25860122 PMCID: PMC4641156 DOI: 10.1007/s11307-015-0832-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Purpose Vitamin B12 (cyanocobalamin, Cbl) is accumulated by rapidly replicating prokaryotic and eukaryotic cells. We investigated the potential of a Tc-99m labelled Cbl derivative ([99mTc]PAMA(4)-Cbl) for targeting infections caused by Escherichia coli and Staphylococcus aureus. In vitro binding assays were followed by biodistribution studies in a mouse model of foreign body infection. Procedures E. coli (ATCC 25922) and S. aureus (ATCC 43335) were used as test strains. [57Co]Cbl, [67Ga]citrate and [99mTc]DTPA served as reference compounds. The in vitro competitive binding of [57Co]Cbl or [99mTc]PAMA(4)-Cbl, and unlabeled Cbl, to viable or killed bacteria, was evaluated at 37 and 4 °C. A cage mouse model of infection was used for biodistribution of intravenous [57Co]Cbl and [99mTc]PAMA(4)-Cbl in cage and dissected tissues of infected and non-infected mice. Results Maximum binding (mean ± SD) of [57Co]Cbl to viable E. coli was 81.7 ± 2.6 % and to S. aureus 34.0 ± 6.7 %, at 37 °C; no binding occurred to heat-killed bacteria. Binding to both test strains was displaced by 100- to 1000-fold excess of unlabeled Cbl. The in vitro binding of [99mTc]PAMA(4)-Cbl was 100-fold and 3-fold lower than the one of [57Co]Cbl for E. coli and S. aureus, respectively. In vivo, [99mTc]PAMA(4)-Cbl showed peak percentage of injected dose (% ID) values between 1.33 and 2.3, at 30 min post-injection (p.i.). Significantly higher retention occurred in cage fluids infected with S. aureus at 4 h and with E. coli at 8 h p.i. than in non-infected animals. Accumulation into infected cages was also higher than the one of [99mTc]DTPA, which showed similar biodistribution in infected and sterile mice. [57Co]Cbl gradually accumulated in cages with peaks % ID between 3.58 and 4.83 % achieved from 24 to 48 h. Discrimination for infection occurred only in E. coli-infected mice, at 72 h p.i. [67Ga]citrate, which showed a gradual accumulation into cage fluids during 12 h, was discriminative for infection from 48 to 72 h p.i. (P < 0.05). Conclusion Cbl displayed rapid and specific in vitro binding to test strains. [99mTc]PAMA(4)-Cbl was rapidly cleared from most tissues and discriminated between sterile and infected cages, being a promising candidate for imaging infections in humans.
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Affiliation(s)
- Daniela Baldoni
- Infectious Diseases Research Laboratory, Department of Biomedicine, University Hospital, Basel, Switzerland
| | - Robert Waibel
- Center for Radiopharmaceutical Science, Paul Scherrer Institute, Villigen PSI, Switzerland
| | - Peter Bläuenstein
- Center for Radiopharmaceutical Science, Paul Scherrer Institute, Villigen PSI, Switzerland
| | - Filippo Galli
- Nuclear Medicine, Department of Medical-Surgical Sciences and of Translational Medicine, Faculty of Medicine and Psychology, "Sapienza" University, Ospedale S. Andrea, via di Grottarossa 1035, 00189, Rome, Italy
| | - Violetta Iodice
- Nuclear Medicine, Department of Medical-Surgical Sciences and of Translational Medicine, Faculty of Medicine and Psychology, "Sapienza" University, Ospedale S. Andrea, via di Grottarossa 1035, 00189, Rome, Italy
| | - Alberto Signore
- Nuclear Medicine, Department of Medical-Surgical Sciences and of Translational Medicine, Faculty of Medicine and Psychology, "Sapienza" University, Ospedale S. Andrea, via di Grottarossa 1035, 00189, Rome, Italy.
| | - Roger Schibli
- Center for Radiopharmaceutical Science, Paul Scherrer Institute, Villigen PSI, Switzerland
| | - Andrej Trampuz
- Septic Surgery Unit, Center for Musculoskeletal Surgery, Charité - University of Medicine, Berlin, Germany
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47
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Paasonen L, Sharma S, Braun GB, Kotamraju VR, Chung TDY, She ZG, Sugahara KN, Yliperttula M, Wu B, Pellecchia M, Ruoslahti E, Teesalu T. New p32/gC1qR Ligands for Targeted Tumor Drug Delivery. Chembiochem 2016; 17:570-5. [PMID: 26895508 DOI: 10.1002/cbic.201500564] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Indexed: 11/08/2022]
Abstract
Cell surface p32, the target of LyP-1 homing peptide, is upregulated in tumors and atherosclerotic plaques and has been widely used as a receptor for systemic delivery of payloads. Here, we identified an improved LyP-1-mimicking peptide (TT1, CKRGARSTC). We used this peptide in a fluorescence polarization-based high-throughput screening of a 50,000-compound chemical library and identified a panel of compounds that bind p32 with low micromolar affinity. Among the hits identified in the screen, two compounds were shown to specifically bind to p32 in multiple assays. One of these compounds was chosen for an in vivo study. Nanoparticles surface-functionalized with this compound specifically adhered to surfaces coated with recombinant p32 and, when injected intravenously, homed to p32-expressing breast tumors in mice. This compound provides a lead for the development of p32-targeted affinity ligands that circumvent some of the limitations of peptide-based probes in guided drug delivery.
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Affiliation(s)
- Lauri Paasonen
- University of Helsinki, Faculty of Pharmacy, Division of Pharmaceutical Biosciences, Viikinkaari 5E, Helsinki, 00014, Finland.,Sanford Burnham Prebys Medical Discovery Institute, Cancer Research Center, 10901 North Torrey Pines Road, La Jolla, CA, 93027, USA
| | - Shweta Sharma
- Sanford Burnham Prebys Medical Discovery Institute, Cancer Research Center, 10901 North Torrey Pines Road, La Jolla, CA, 93027, USA
| | - Gary B Braun
- Sanford Burnham Prebys Medical Discovery Institute, Cancer Research Center, 10901 North Torrey Pines Road, La Jolla, CA, 93027, USA
| | - Venkata Ramana Kotamraju
- Sanford Burnham Prebys Medical Discovery Institute, Cancer Research Center, 10901 North Torrey Pines Road, La Jolla, CA, 93027, USA.,Sanford Burnham Prebys Medical Discovery Institute Center for Nanomedicine, University of California, Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Thomas D Y Chung
- Sanford Burnham Prebys Medical Discovery Institute, Conrad Prebys Center for Chemical Genomics, 10901 North Torrey Pines Road, La Jolla, CA, 93027, USA
| | - Zhi-Gang She
- Sanford Burnham Prebys Medical Discovery Institute, Cancer Research Center, 10901 North Torrey Pines Road, La Jolla, CA, 93027, USA
| | - Kazuki N Sugahara
- Sanford Burnham Prebys Medical Discovery Institute, Cancer Research Center, 10901 North Torrey Pines Road, La Jolla, CA, 93027, USA.,Department of Surgery, Columbia University College of Physicians and Surgeons, 1130 St Nicholas Avenue, Suite 217C, New York, NY, 100032, USA
| | - Marjo Yliperttula
- University of Helsinki, Faculty of Pharmacy, Division of Pharmaceutical Biosciences, Viikinkaari 5E, Helsinki, 00014, Finland
| | - Bainan Wu
- Sanford Burnham Prebys Medical Discovery Institute, Cancer Research Center, 10901 North Torrey Pines Road, La Jolla, CA, 93027, USA
| | - Maurizio Pellecchia
- Sanford Burnham Prebys Medical Discovery Institute, Cancer Research Center, 10901 North Torrey Pines Road, La Jolla, CA, 93027, USA.,School of Medicine, University of California, Riverside, Riverside, CA, 92521, USA
| | - Erkki Ruoslahti
- Sanford Burnham Prebys Medical Discovery Institute, Cancer Research Center, 10901 North Torrey Pines Road, La Jolla, CA, 93027, USA.,Sanford Burnham Prebys Medical Discovery Institute Center for Nanomedicine, University of California, Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Tambet Teesalu
- Sanford Burnham Prebys Medical Discovery Institute, Cancer Research Center, 10901 North Torrey Pines Road, La Jolla, CA, 93027, USA. .,Sanford Burnham Prebys Medical Discovery Institute Center for Nanomedicine, University of California, Santa Barbara, Santa Barbara, CA, 93106, USA. .,Laboratory of Cancer Biology, Institute of Biomedicine and Translational Medicine, University of Tartu, Ravila 14B, Tartu, 50411, Estonia.
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48
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Zelder F. Recent trends in the development of vitamin B12 derivatives for medicinal applications. Chem Commun (Camb) 2015; 51:14004-17. [PMID: 26287029 DOI: 10.1039/c5cc04843e] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This Feature Article highlights recent developments in the field of vitamin B12 derivatives for medicinal applications. The following topics are emphasized: (1) the development of aquacorrinoids for cyanide detection and detoxification, (2) the use of vitamin B12 conjugates and (3) antivitamins B12 for therapy and diagnosis, and (4) the design of corrinoids as activators of soluble guanylyl cyclase (sGC).
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Affiliation(s)
- Felix Zelder
- Department of Chemistry, University of Zürich, Winterthurerstr. 190, CH-8057 Zürich, Switzerland.
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49
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Abstract
B12 -antimetabolites are compounds that counteract the physiological effects of vitamin B12 and related natural cobalamins. Presented here is a structure- and reactivity-based concept of the specific 'antivitamins B12 ': it refers to analogues of vitamin B12 that display high structural similarity to the vitamin and are 'locked chemically' to prevent their metabolic conversion into the crucial organometallic B12 -cofactors. Application of antivitamins B12 to healthy laboratory animals is, thus, expected to induce symptoms of B12 -deficiency. Antivitamins B12 may, hence, be helpful in elucidating still largely puzzling pathophysiological phenomena associated with B12 -deficiency, and also in recognizing physiological roles of B12 that probably still remain to be discovered.
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Affiliation(s)
- Bernhard Kräutler
- Institute of Organic Chemistry & Center for Molecular Biosciences (CMBI), University of Innsbruck, Innrain 80/82, 6020 Innsbruck (Austria).
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50
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Zelder F, Sonnay M, Prieto L. Antivitamins for Medicinal Applications. Chembiochem 2015; 16:1264-78. [PMID: 26013037 DOI: 10.1002/cbic.201500072] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Indexed: 12/14/2022]
Abstract
Antivitamins represent a broad class of compounds that counteract the essential effects of vitamins. The symptoms triggered by such antinutritional factors resemble those of vitamin deficiencies, but can be successfully reversed by treating patients with the intact vitamin. Despite being undesirable for healthy organisms, the toxicities of these compounds present considerable interest for biological and medicinal purposes. Indeed, antivitamins played fundamental roles in the development of pioneering antibiotic and antiproliferative drugs, such as prontosil and aminopterin. Their development and optimisation were made possible by the study, throughout the 20th century, of the vitamins' and antivitamins' functions in metabolic processes. However, even with this thorough knowledge, commercialised antivitamin-based drugs are still nowadays limited to antagonists of vitamins B9 and K. The antivitamin field thus still needs to be explored more intensely, in view of the outstanding therapeutic success exhibited by several antivitamin-based medicines. Here we summarise historical achievements and discuss critically recent developments, opportunities and potential limitations of the antivitamin approach, with a special focus on antivitamins K, B9 and B12 .
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Affiliation(s)
- Felix Zelder
- Institute of Chemistry, University of Zürich, Winterthurerstrasse 190, 8057 Zürich (Switzerland).
| | - Marjorie Sonnay
- Institute of Chemistry, University of Zürich, Winterthurerstrasse 190, 8057 Zürich (Switzerland)
| | - Lucas Prieto
- Institute of Chemistry, University of Zürich, Winterthurerstrasse 190, 8057 Zürich (Switzerland)
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