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Zierke MA, Rangger C, Samadikhah K, Panzer M, Dichtl S, Hörmann N, Wilflingseder D, Schmid AM, Haubner R. [ 68Ga]Ga-NODAGA-TriGalactan, a low molecular weight tracer for the non-invasive imaging of the functional liver reserve. EJNMMI Radiopharm Chem 2024; 9:41. [PMID: 38750246 PMCID: PMC11096148 DOI: 10.1186/s41181-024-00271-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Accepted: 04/29/2024] [Indexed: 05/18/2024] Open
Abstract
BACKGROUND Determination of the functional liver mass is important in a variety of clinical settings including liver surgery and transplantation. [99mTc]Tc-diethylenetriamine-pentaacetic acid galactosyl human serum albumin (99mTc-GSA) is a radiotracer targeting the asialoglycoprotein receptor (ASGR) and is routinely used in Japan for this purpose. Here we describe the development and evaluation of [68Ga]Ga-NODAGA-TriGalactan a low molecular weight PET-tracer targeting this structure. RESULTS For synthesis TRIS as branching unit and NODAGA as chelator for labelling with [68Ga]Ga are included. Three galactose moieties are conjugated via a click chemistry approach resulting in the desired labelling precursor.68Ga-labelling could be accomplished in high radiochemical yield and purity. [68Ga]Ga-NODAGA-TriGalactan is very hydrophilic and revealed high plasma stability and low plasma protein binding. Fluorescence imaging showed binding on ASGR-positive organoids and the IC50-value was in the nanomolar range. Most importantly, both biodistribution as well as animal imaging studies using normal mice demonstrated high liver uptake with rapid elimination from all other organs leading to even higher liver-to-background ratios as found for 99mTc-GSA. CONCLUSION [68Ga]Ga-NODAGA-TriGalactan shows high in vitro stability and selectively binds to the ASGR allowing imaging of the functional liver mass with high contrast. Thus, our first generation compound resulted already in an alternative to 99mTc-GSA for imaging the functional liver reserve and might allow the broader use of this imaging technique.
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Affiliation(s)
- Maximilian A Zierke
- Department of Nuclear Medicine, Medical University Innsbruck, Anichstr. 35, Innsbruck, 6020, Austria
| | - Christine Rangger
- Department of Nuclear Medicine, Medical University Innsbruck, Anichstr. 35, Innsbruck, 6020, Austria
| | - Kimia Samadikhah
- Werner Siemens Imaging Center, Department of Preclinical Imaging and Radiopharmacy, Eberhard Karls University Tübingen, Röntgenweg 13, 73076, Tübingen, Germany
| | - Marlene Panzer
- Department of Internal Medicine I, Medical University Innsbruck, Anichstr. 35, Innsbruck, 6020, Austria
| | - Stefanie Dichtl
- Institute of Hygiene and Medical Microbiology, Medical University Innsbruck, Schöpfstr. 41, Innsbruck, 6020, Austria
| | - Nikolas Hörmann
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, University of Innsbruck, Innrain, 80-82, Innsbruck, 6020, Austria
| | - Doris Wilflingseder
- Institute of Hygiene and Medical Microbiology, Medical University Innsbruck, Schöpfstr. 41, Innsbruck, 6020, Austria
| | - Andreas M Schmid
- Werner Siemens Imaging Center, Department of Preclinical Imaging and Radiopharmacy, Eberhard Karls University Tübingen, Röntgenweg 13, 73076, Tübingen, Germany
| | - Roland Haubner
- Department of Nuclear Medicine, Medical University Innsbruck, Anichstr. 35, Innsbruck, 6020, Austria.
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Salari N, Faraji F, Torghabeh FM, Faraji F, Mansouri K, Abam F, Shohaimi S, Akbari H, Mohammadi M. Polymer-based drug delivery systems for anticancer drugs: A systematic review. Cancer Treat Res Commun 2022; 32:100605. [PMID: 35816909 DOI: 10.1016/j.ctarc.2022.100605] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 06/21/2022] [Accepted: 07/02/2022] [Indexed: 06/15/2023]
Abstract
Recent advances in nanotechnology sciences lead to the development of new treatment approaches for various diseases such as cancer. Nanotechnology advances can potentially minimize the side effects of drugs through the employment of effective and controlled drug delivery systems (DDSs). Polymers are optimal tools providing drug delivery mechanisms through the unique features of pharmacokinetics, circulation time, biocompatibility, and biodegradability. This systematic review aimed to evaluate polymer-based DDSs for anticancer drugs and their various therapeutic applications in cancer treatment. This study was conducted with no time limitation by November 2021. Related articles were collected through a deep search in English and Persian databases of SID, MagIran, Scopus, Web Of Science (WoS), PubMed, Science Direct, and Google Scholar. Keywords included drug delivery system, anticancer agent, polymeric nanostructure-based drug delivery, polymer-based drug delivery, and polymeric system. As the results showed, polymeric nanoparticles (PNPs) have influential roles in cancer treatment than conventional chemotherapy procedures. PNPs can reduce cytotoxicity following chemotherapy drug administration, improve the solubility characteristics of these therapeutic agents and inhibit the rate of tumor growth.
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Affiliation(s)
- Nader Salari
- Department of Biostatistics, School of Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Farahnaz Faraji
- Department of Pharmaceutics, School of Pharmacy, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Fatemeh Mansouri Torghabeh
- Department of Physiology Sciences, Medical School, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Fatemeh Faraji
- Student research committee, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Kamran Mansouri
- Medical Biology Research Centre, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Farzaneh Abam
- Medical Biology Research Centre, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Shamarina Shohaimi
- Department of Biology, Faculty of Science, University Putra Malaysia, Serdang, Selangor, Malaysia
| | - Hakimeh Akbari
- Cellular and Molecular Research Center, Gerash University of Medical Sciences, Gerash, Iran
| | - Masoud Mohammadi
- Cellular and Molecular Research Center, Gerash University of Medical Sciences, Gerash, Iran.
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Sahoo JK, Hasturk O, Choi J, Montero MM, Descoteaux ML, Laubach IA, Kaplan DL. Sugar Functionalization of Silks with Pathway-Controlled Substitution and Properties. Adv Biol (Weinh) 2021; 5:e2100388. [PMID: 33929098 PMCID: PMC8266746 DOI: 10.1002/adbi.202100388] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 04/01/2021] [Indexed: 12/20/2022]
Abstract
Silk biomaterials are important for applications in biomedical fields due to their outstanding mechanical properties, biocompatibility, and tunable biodegradation. Chemical functionalization of silk by various chemistries can be leveraged to enhance and tune these features and enable the expansion of silk-based biomaterials into additional fields. Sugars are particularly relevant for intracellular communication, signal transduction events, as well as in hydrated extracellular matrices such as in cartilage, vitreous, and brain tissues. Multiple reaction pathways are demonstrated (carboxylation of serines followed by carbodiimide coupling with glucosamine, carboxylation of tyrosines followed by carbodiimide coupling with glucosamine; direct carbodiimide coupling of the inherent carboxylic acids of silk (aspartic and glutamic acid) with glucosamine) for the covalent conjugation of glucosamine onto silk with characterization by proton nuclear magnetic resonance (1 H-NMR), liquid chromatography tandem mass spectroscopy (LC-MS), water contact angle (WCA), and Fourier transform infrared (FTIR) spectroscopy. The results indicate that different pathways substitute different amounts of glucosamine onto silk chains, with control over resulting material properties, including hydrophobicity/hydrophilicity and biological responses. The aqueous processability of these conjugates into functional material formats (films, sponges) is assessed. These new classes of bio-inspired materials can lead to multifunctional biomaterials for potential applications in different fields of biomedical engineering.
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Affiliation(s)
- Jugal Kishore Sahoo
- Department of Biomedical Engineering, Tufts University, 4 Colby St., Medford, MA, 02155, USA
| | - Onur Hasturk
- Department of Biomedical Engineering, Tufts University, 4 Colby St., Medford, MA, 02155, USA
| | - Jaewon Choi
- Department of Biomedical Engineering, Tufts University, 4 Colby St., Medford, MA, 02155, USA
| | - Maria M Montero
- Department of Biomedical Engineering, Tufts University, 4 Colby St., Medford, MA, 02155, USA
| | - Marc L Descoteaux
- Department of Biomedical Engineering, Tufts University, 4 Colby St., Medford, MA, 02155, USA
| | - Isabel A Laubach
- Department of Biomedical Engineering, Tufts University, 4 Colby St., Medford, MA, 02155, USA
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, 4 Colby St., Medford, MA, 02155, USA
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NCOA4 is regulated by HIF and mediates mobilization of murine hepatic iron stores after blood loss. Blood 2021; 136:2691-2702. [PMID: 32659785 DOI: 10.1182/blood.2020006321] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 06/27/2020] [Indexed: 12/17/2022] Open
Abstract
The mechanisms by which phlebotomy promotes the mobilization of hepatic iron stores are not well understood. NCOA4 (nuclear receptor coactivator 4) is a widely expressed intracellular protein previously shown to mediate the autophagic degradation of ferritin. Here, we investigate a local requirement for NCOA4 in the regulation of hepatic iron stores and examine mechanisms of NCOA4 regulation. Hepatocyte-targeted Ncoa4 knockdown in nonphlebotomized mice had only modest effects on hepatic ferritin subunit levels and nonheme iron concentration. After phlebotomy, mice with hepatocyte-targeted Ncoa4 knockdown exhibited anemia and hypoferremia similar to control mice with intact Ncoa4 regulation but showed a markedly impaired ability to lower hepatic ferritin subunit levels and hepatic nonheme iron concentration. This impaired hepatic response was observed even when dietary iron was limited. In both human and murine hepatoma cell lines, treatment with chemicals that stabilize hypoxia inducible factor (HIF), including desferrioxamine, cobalt chloride, and dimethyloxalylglycine, raised NCOA4 messenger RNA. This NCOA4 messenger RNA induction occurred within 3 hours, preceded a rise in NCOA4 protein, and was attenuated in the setting of dual HIF-1α and HIF-2α knockdown. In summary, we show for the first time that NCOA4 plays a local role in facilitating iron mobilization from the liver after blood loss and that HIF regulates NCOA4 expression in cells of hepatic origin. Because the prolyl hydroxylases that regulate HIF stability are oxygen- and iron-dependent enzymes, our findings suggest a novel mechanism by which hypoxia and iron deficiency may modulate NCOA4 expression to impact iron homeostasis.
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Polymer Membrane with Glycosylated Surface by a Chemo-Enzymatic Strategy for Protein Affinity Adsorption. Catalysts 2020. [DOI: 10.3390/catal10040415] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Membranes with glycosylated surfaces are naturally biomimetic and not only have excellent surface hydrophilicity and biocompatibility, but have a specific recognition to target biomacromolecules due to the unique chemo-biological properties of their surface carbohydrates; however, they cannot be easily chemically produced on large scales due to the complex preparation process. This manuscript describes the fabrication of a polypropylene membrane with a glycosylated surface by a chemo-enzymatic strategy. First, hydroxyl (OH) groups were introduced onto the surface of microporous polypropylene membrane (MPPM) by UV-induced grafting polymerization of oligo(ethylene glycol) methacrylate (OEGMA). Then, glycosylation of the OH groups with galactose moieties was achieved via an enzymatic transglycosylation by β-galactosidase (Gal) recombinanted from E. coli. The fabricated glycosylated membrane showed surprisingly specific affinity adsorption to lectin ricinus communis agglutinin (RCA120). The chemo-enzymatic route is easy and green, and it would be expected to have wide applications for large-scale preparation of polymer membranes with glycosylated surfaces.
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Wilson DS, Damo M, Hirosue S, Raczy MM, Brünggel K, Diaceri G, Quaglia-Thermes X, Hubbell JA. Synthetically glycosylated antigens induce antigen-specific tolerance and prevent the onset of diabetes. Nat Biomed Eng 2019; 3:817-829. [DOI: 10.1038/s41551-019-0424-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 06/07/2019] [Indexed: 12/19/2022]
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7
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Jeon JH, Park JH, Kim TI. Phenylboronic acid-conjugated cationic methylcellulose for hepatocellular carcinoma-targeted drug/gene co-delivery systems. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.03.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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8
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Lifshiz Zimon R, Lerman G, Elharrar E, Meningher T, Barzilai A, Masalha M, Chintakunta R, Hollander E, Goldbart R, Traitel T, Harats M, Sidi Y, Avni D, Kost J. Ultrasound targeting of Q-starch/miR-197 complexes for topical treatment of psoriasis. J Control Release 2018; 284:103-111. [DOI: 10.1016/j.jconrel.2018.05.040] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2017] [Revised: 05/29/2018] [Accepted: 05/30/2018] [Indexed: 11/24/2022]
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9
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Dhande YK, Wagh BS, Hall BC, Sprouse D, Hackett PB, Reineke TM. N-Acetylgalactosamine Block-co-Polycations Form Stable Polyplexes with Plasmids and Promote Liver-Targeted Delivery. Biomacromolecules 2016; 17:830-40. [DOI: 10.1021/acs.biomac.5b01555] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yogesh K. Dhande
- Department of Chemical Engineering and Materials Science, and Center
for Genome Engineering, ‡Department of Chemistry and Center for Genome Engineering, and §Department of Genetics,
Cell Biology and Development, and Center for Genome Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Bharat S. Wagh
- Department of Chemical Engineering and Materials Science, and Center
for Genome Engineering, ‡Department of Chemistry and Center for Genome Engineering, and §Department of Genetics,
Cell Biology and Development, and Center for Genome Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Bryan C. Hall
- Department of Chemical Engineering and Materials Science, and Center
for Genome Engineering, ‡Department of Chemistry and Center for Genome Engineering, and §Department of Genetics,
Cell Biology and Development, and Center for Genome Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Dustin Sprouse
- Department of Chemical Engineering and Materials Science, and Center
for Genome Engineering, ‡Department of Chemistry and Center for Genome Engineering, and §Department of Genetics,
Cell Biology and Development, and Center for Genome Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Perry B. Hackett
- Department of Chemical Engineering and Materials Science, and Center
for Genome Engineering, ‡Department of Chemistry and Center for Genome Engineering, and §Department of Genetics,
Cell Biology and Development, and Center for Genome Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Theresa M. Reineke
- Department of Chemical Engineering and Materials Science, and Center
for Genome Engineering, ‡Department of Chemistry and Center for Genome Engineering, and §Department of Genetics,
Cell Biology and Development, and Center for Genome Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
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10
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Ahmed M, Narain R. Carbohydrate-based materials for targeted delivery of drugs and genes to the liver. Nanomedicine (Lond) 2015. [DOI: 10.2217/nnm.15.58] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The insult to liver by toxic materials leads to cirrhosis, hepatitis and cancer. Upon administration, drugs accumulate in liver, which is systemically cleared by reticuloendothelial system. However, specific targeting of drugs to liver is a serious challenge. Specific delivery of molecules to hepatocytes is accomplished by targeting cell surface lectins, asialoglycoprotein receptors. Asialofetuin, N-acetyl glucosamine and galactose are high-affinity ligands of asialoglycoprotein receptors. The bioconjugation of drugs, fluorescent molecules and gene delivery vectors with lectin-targeting agents, and their delivery in liver hepatocytes, is discussed. Mannose and N-acetyl glucosamine conjugates are evaluated for their delivery to hepatic stellate and kupffer cells. The glycosylated gene and drug delivery vectors in clinical trials are outlined.
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Affiliation(s)
- Marya Ahmed
- Chemical Engineering, California Institute of Technology, 1200 E California Blvd, Pasadena, CA 91125, USA
| | - Ravin Narain
- Chemical & Materials Engineering, University of Alberta, 116 St & 85 Ave, Edmonton, AB T6G 2R3, Canada
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11
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Munisso M, Obika S, Yamaoka T. Nucleic acid delivery systems based on poly(galactosyl ureaethyl methacrylate-b-dimethylamino ethyl methacrylate) diblock copolymers. Carbohydr Polym 2014; 114:288-296. [DOI: 10.1016/j.carbpol.2014.08.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 08/04/2014] [Accepted: 08/05/2014] [Indexed: 10/24/2022]
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12
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Glisoni RJ, Sosnik A. Novel Poly(Ethylene Oxide)-b-Poly(Propylene Oxide) Copolymer-Glucose Conjugate by the Microwave-Assisted Ring Opening of a Sugar Lactone. Macromol Biosci 2014; 14:1639-51. [DOI: 10.1002/mabi.201400235] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 07/30/2014] [Indexed: 12/30/2022]
Affiliation(s)
- Romina J. Glisoni
- The Group of Biomaterials and Nanotechnology for Improved Medicines (BIONIMED), Department of Pharmaceutical Technology, Faculty of Pharmacy and Biochemistry; University of Buenos Aires; Buenos Aires CP1113 Argentina
- National Science Research Council (CONICET); Buenos Aires Argentina
| | - Alejandro Sosnik
- Group of Pharmaceutical Nanomaterials Science, Department of Materials Science and Engineering; Technion-Israel Institute of Technology; Technion City 32000 Haifa Israel
- Department of Materials Science and Engineering, De-Jur Building, Office 607; Technion-Israel Institute of Technology; Technion City 32000 Haifa Israel
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13
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Sieradzki R, Traitel T, Goldbart R, Geresh S, Kost J. Tailoring quaternized starch as a non-viral carrier for gene delivery applications. POLYM ADVAN TECHNOL 2014. [DOI: 10.1002/pat.3277] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Rivka Sieradzki
- Department of Biotechnology; Ben-Gurion University of the Negev; Beer-Sheva 84105 Israel
| | - Tamar Traitel
- Department of Chemical Engineering; Ben-Gurion University of the Negev; Beer-Sheva 84105 Israel
| | - Riki Goldbart
- Department of Chemical Engineering; Ben-Gurion University of the Negev; Beer-Sheva 84105 Israel
| | - Shimona Geresh
- Department of Biotechnology; Ben-Gurion University of the Negev; Beer-Sheva 84105 Israel
| | - Joseph Kost
- Department of Chemical Engineering; Ben-Gurion University of the Negev; Beer-Sheva 84105 Israel
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14
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Ajish JK, Ajish Kumar KS, Subramanian M, Kumar M. d-Glucose based bisacrylamide crosslinker: synthesis and study of homogeneous biocompatible glycopolymeric hydrogels. RSC Adv 2014. [DOI: 10.1039/c4ra09481f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The ability of sugar pendants in glycopolymeric hydrogels to mimic that on the cell surface can be used as a reliable method for the site specific delivery of drugs.
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Affiliation(s)
- Juby K. Ajish
- Radiation and Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400085, India
| | - K. S. Ajish Kumar
- Bio-Organic Division
- Bhabha Atomic Research Centre
- Mumbai 400085, India
| | | | - Manmohan Kumar
- Radiation and Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400085, India
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15
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Chang WY, Kao HW, Wang HE, Chen JT, Lin WJ, Wang SJ, Chen CL. Synthesis and biological evaluation of technetium-99m labeled galactose derivatives as potential asialoglycoprotein receptor probes in a hepatic fibrosis mouse model. Bioorg Med Chem Lett 2013; 23:6486-91. [PMID: 24119556 DOI: 10.1016/j.bmcl.2013.09.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Revised: 08/31/2013] [Accepted: 09/05/2013] [Indexed: 12/12/2022]
Abstract
Two galactose derivatives, a monovalent (99m)Tc-MAMA-MGal galactoside and a divalent (99m)Tc-MAMA-DGal galactoside, were synthesized and radiolabeled in high radiochemical purity (>98%). Dynamic microSPECT imaging and biodistribution study of two traces in normal and liver fibrosis mice showed that the (99m)Tc-MAMA-DGal revealed higher specific binding to asialoglycoprotein receptors in liver and then rapidly excreted via both hepatobiliary system and renal clearance. The results suggest that (99m)Tc-MAMA-DGal may be used as SPECT probes for noninvasive evaluation of asialoglycoprotein receptor-related liver dysfunction.
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Affiliation(s)
- Wen-Yi Chang
- Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, 155, Sec.2, Linong St., Taipei 11217, Taiwan
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16
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18F-FBHGal for asialoglycoprotein receptor imaging in a hepatic fibrosis mouse model. Bioorg Med Chem 2013; 21:912-21. [DOI: 10.1016/j.bmc.2012.12.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Revised: 12/07/2012] [Accepted: 12/07/2012] [Indexed: 01/29/2023]
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17
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Sakai S, Kim J, Hexig B, Okahata Y, Cho C, Akaike T. Adsorption behaviors of recombinant E-cadherin-IgG Fc fusion protein on polystyrene surface. Colloids Surf B Biointerfaces 2012; 94:192-8. [DOI: 10.1016/j.colsurfb.2012.01.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2011] [Revised: 12/06/2011] [Accepted: 01/23/2012] [Indexed: 10/28/2022]
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18
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Chhabra D, Nash K. Icodextrin: an alternative peritoneal dialysis fluid. Expert Opin Drug Metab Toxicol 2009; 4:1455-64. [PMID: 18950286 DOI: 10.1517/17425255.4.11.1455] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Peritoneal dialysis is a home dialysis therapy in which a fluid known as dialysate is placed into the patient's peritoneal cavity. The standard dialysate consists of a concentrated dextrose solution. Icodextrin is a glucose polymer that can be substituted for dextrose with avoidance of some of the glucose-dependant effects. The efficacy and safety of this compound was evaluated and compared with the standard dialysate solutions. It seems to be well-tolerated overall and may offer benefits in select populations of patients with kidney failure. This seems to be especially relevant in patients with more permeable peritoneal membranes who are known as 'high-transporters'.
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Affiliation(s)
- Darshika Chhabra
- Evanston Northwestern Healthcare, Feinberg School of Medicine, Division of Nephrology and Hypertension, Chicago, Illinois, Il 60201, Evanston, USA.
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19
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Ohno M, Motojima K, Okano T, Taniguchi A. Maturation of the Extracellular Matrix and Cell Adhesion Molecules in Layered Co-cultures of HepG2 and Endothelial Cells. J Biochem 2009; 145:591-7. [DOI: 10.1093/jb/mvp019] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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20
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Bertini V, Pocci M, Alfei S, Idini B, Lucchesini F. Synthesis of crosslinked nanostructured saccharidic vinyl copolymers and their functionalization. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.08.106] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Synthetic sandwich culture of 3D hepatocyte monolayer. Biomaterials 2007; 29:290-301. [PMID: 17964646 DOI: 10.1016/j.biomaterials.2007.09.016] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2007] [Accepted: 09/17/2007] [Indexed: 12/17/2022]
Abstract
The sandwich culture of hepatocytes, between double layers of extra-cellular matrix (ECM), is a well-established in vitro model for re-establishing hepatic polarity and maintaining differentiated functions. Applications of the ECM-based sandwich culture are limited by the mass transfer barriers induced by the top gelled ECM layer, complex molecular composition of ECM with batch-to-batch variation and uncontrollable coating of the ECM double layers. We have addressed these limitations of the ECM-based sandwich culture by developing an 'ECM-free' synthetic sandwich culture, which is constructed by sandwiching a 3D hepatocyte monolayer between a glycine-arginine-glycine-aspatic acid-serine (GRGDS)-modified polyethylene terephthalate (PET) track-etched membrane (top support) and a galactosylated PET film (bottom substratum). The bioactive top support and bottom substratum in the synthetic sandwich culture substituted for the functionalities of the ECM in the ECM-based sandwich culture with further improvement in mass transfer and optimal material properties. The 3D hepatocyte monolayer in the synthetic sandwich culture exhibited a similar process of hepatic polarity formation, better cell-cell interaction and improved differentiated functions over 14-day culture compared to the hepatocytes in collagen sandwich culture. The novel 3D hepatocyte monolayer sandwich culture using bioactive synthetic materials may readily replace the ECM-based sandwich culture for liver tissue engineering applications, such as drug metabolism/toxicity testing and hepatocyte-based bioreactors.
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Kim SH, Akaike T. Epidermal Growth Factor Signaling for Matrix-Dependent Cell Proliferation and Differentiation in Primary Cultured Hepatocytes. ACTA ACUST UNITED AC 2007; 13:601-9. [PMID: 17518606 DOI: 10.1089/ten.2006.0104] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Understanding hepatocellular signaling occurring in biomaterial systems is important for successful hepatic tissue engineering. Toward this end, we employed synthetic glycopolymers, as artificial matrices, to examine integrin-mediated epidermal growth factor (EGF) signaling in primary hepatocyte cultures. We dispersed hepatocytes on a collagen matrix or on a synthetic glycopolymer matrix and subsequently stimulated them with EGF. Only hepatocytes cultured on collagen proliferated, and we observed significant expression of cyclin B1 in these cells. Pharmacological agents, LY294004 (a phosphatidylinositol [PI] 3-kinase inhibitor) and AG1478 (an EGF kinase receptor inhibitor), blocked hepatocyte proliferation and cyclin B1 expression. In addition, EGF-stimulated hepatocytes formed spheroids, exhibited membrane ruffling, and increased tryptophan 2,3-oxygenase (TO) expression when cultured on glycopolymer matrices. Interestingly, PI 3-kinase inhibition suppressed membrane ruffling, spheroid formation, and TO expression. Taken together, this data suggests PI 3-kinase plays an important role in mediating cross talk between integrin and the EGF signaling pathways in primary hepatocyte cultures.
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Affiliation(s)
- Sang-Heon Kim
- Biomaterial Research Center, Korea Institute of Science and Technology, Seoul, Korea
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Yan H, Tram K. Glycotargeting to improve cellular delivery efficiency of nucleic acids. Glycoconj J 2007; 24:107-23. [PMID: 17268860 DOI: 10.1007/s10719-006-9023-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2006] [Revised: 11/07/2006] [Accepted: 11/14/2006] [Indexed: 10/23/2022]
Abstract
Nucleic acids bearing glycans of various structures have been under vigorous investigation in the past decade. The carbohydrate moieties of such complexes can serve as recognition sites for carbohydrate-binding proteins-lectins-and initiate receptor-mediated endocytosis. Therefore, carbohydrates can enhance cell targeting and internalization of nucleic acids that are associated with them and thus improve the bioavailability of nucleic acids as therapeutic agents. This review summarizes nucleic acid glycosylation in nature and approaches for the preparation of both non-covalently associated and covalently-linked carbohydrate-nucleic acid complexes.
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Affiliation(s)
- Hongbin Yan
- Department of Chemistry, Brock University, 500 Glenridge Ave., St. Catharines, ON, Canada.
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Seo SJ, Choi YJ, Akaike T, Higuchi A, Cho CS. Alginate/galactosylated chitosan/heparin scaffold as a new synthetic extracellular matrix for hepatocytes. ACTA ACUST UNITED AC 2006; 12:33-44. [PMID: 16499440 DOI: 10.1089/ten.2006.12.33] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Formation of multicellular hepatocyte spheroids in the three-dimensional culture is a potential approach for enhancing liver-specific functions in bioartificial liver (BAL) devices. In this study, as a synthetic extracellular matrix (ECM) for hepatocytes, a highly porous hydrogel (sponge-like) scaffold, 150-200 microm pore size in diameter, was fabricated with alginate (AL), galactosylated chitosan (GC), and heparin through electrostatic interaction. We attempt to select the best condition of AL/GC/heparin sponges for coculture with NIH3T3, as well as compare the liver-specific functions with monoculture. Cell adhesion to GC based on AL film was significantly increased with increasing GC concentration, but not to chitosan regardless of its concentration. The optimal concentration of GC and heparin in AL/GC/heparin sponges to perform the best liver-specific function was 1 and 6 wt% to AL contents, respectively, where albumin secretion were maintained with maximal rates. The mechanical properties in tensile strength of three types of sponges were very slightly different from one another. Cell viabilities performed on AL, AL/GC, and AL/GC/heparin sponges were 68.5, 83.3, and 90.4 % of control, respectively, after 15 days of incubation. Hepatocyte spheroids were more rapidly formed in the AL/GC and AL/GC/heparin sponges, with diameter enlarged to about 100 microm, than in AL sponges. Connexin32 and E-cadherin genes correlated with cell-to-cell adhesion were expressed in hepatocytes within AL/GC and AL/GC/heparin sponges at 36 h after incubation, but not in AL sponges. Treatment of a gap junctional intercellular communication (GJIC) inhibitor, 18beta-glycyrrhetinic acid, indicates that cell aggregation without GJIC does not perform the liver-specific functions for long periods. In the presence of HGF, the level of albumin secretion in AL/GC/heparin sponges was markedly elevated compared to that in AL/GC sponges. Coculture of hepatocytes in AL/GC/heparin sponges with NIH3T3 in a transwell insert resulted in significant increase of liver-specific functions, such as improved albumin secretion rates, ammonia elimination rates, and ethoxyresorufin-O-deethylase activity by cytochrome P4501A1 compared to those in hepatocyte monoculture. The results suggest that hepatocytes as stable spheroids enhance liver-specific functions in AL/GC/heparin sponges, providing a new synthetic ECM to design BAL devices.
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Affiliation(s)
- Seog-Jin Seo
- School of Agricultural Biotechnology, Seoul National University, Seoul, Korea
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Ogiwara K, Nagaoka M, Cho CS, Akaike T. Effect of photo-immobilization of epidermal growth factor on the cellular behaviors. Biochem Biophys Res Commun 2006; 345:255-9. [PMID: 16678132 DOI: 10.1016/j.bbrc.2006.04.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2006] [Accepted: 04/03/2006] [Indexed: 10/24/2022]
Abstract
We constructed photo-reactive epidermal growth factor (EGF) bearing p-azido phenylalanine at the C-terminal (HEGFP) by genetic engineering to investigate the possibility of immobilized EGF as a novel artificial extracellular matrix (ECM). The constructed recombinant protein was immobilized to glass surface by ultraviolet irradiation. A431 cells adhered both to HEGFP-immobilized and collagen-coated surfaces. Interaction between immobilized HEGFP and EGF receptors in the A431 cells was independent of Mg(2+) although integrin-mediated cell adhesion to natural ECMs is dependent on Mg(2+). Phosphorylation of EGF receptors in A431 cells was induced by immobilized HEGFP as same as soluble EGF. DNA uptake of hepatocytes decreased by immobilized HEGFP whereas it increased by soluble EGF. Liver-specific functions of hepatocytes were maintained for 3 days by immobilized HEGFP whereas they were not maintained by soluble EGF, indicating that immobilized HEGFP follows different signal transduction pathway from soluble EGF.
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Affiliation(s)
- Kazutaka Ogiwara
- Department of Biomolecular Engineering, Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Yokohama 226-8501, Japan
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Yura H, Ishihara M, Kanatani Y, Takase B, Hattori H, Suzuki S, Kawakami M, Matsui T. Interaction Study between Synthetic Glycoconjugate Ligands and Endocytic Receptors Using Flow Cytometry. ACTA ACUST UNITED AC 2006; 139:637-43. [PMID: 16672263 DOI: 10.1093/jb/mvj077] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Flow cytometric analysis of synthetic galactosyl polymers, asialofetuin and LDL derivatives labeled with FITC (Fluorescein Isothiocyanate) was carried out to determine the phenotypes of endocytic receptors, such as asialoglycoprotein (ASPG) and the LDL receptor, on various types of cells. When FITC-labeled galactosyl polystyrene (GalCPS), being a synthetic ligand of ASPG, was applied to rat hepatocytes and human cancer cells (Hep G2 and Chang Liver), surface fluorescence intensities varied according to receptor expression on the cells. The fluorescence intensity originates from the calcium-dependent binding of the FITC-labeled GalCPS. Although unaltered by pre-treatment with glucosyl polystyrene (GluCPS), fetuin and LDL, the fluorescence intensity was suppressed by pre-treatment with (non-labeled) GalCPS and asialofetuin. Flow cytometry allowed us to demonstrate that the calcium-dependent binding of FITC-labeled LDL (prepared from rabbits) upon the addition of 17alpha-ethinyl estradiol enhances LDL receptor expression, and the expression is suppressed upon the addition of a monoclonal antibody to the LDL receptor. The binding efficiency based on the combination of FITC-labeled ligands suggests a possible application for the classification of cell types and conditions corresponding to endocytic receptor expression without the need for immuno-active antibodies or radiolabeled substances. Furthermore, the synthetic glycoconjugate (GalCPS) is shown to be a sensitive and useful marker for classification based on cell phenotype using flow cytometry.
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Affiliation(s)
- Hirofumi Yura
- NeTech Inc. KSP West 300-H, Sakado 3-2-1, Takatsu, Kawasaki, Kanagawa 213-0012
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Seo SJ, Moon HS, Guo DD, Kim SH, Akaike T, Cho CS. Receptor-mediated delivery of all-trans-retinoic acid (ATRA) to hepatocytes from ATRA-loaded poly(N-p-vinylbenzyl-4-o-β-d-galactopyranosyl-d-gluconamide) nanoparticles. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2006. [DOI: 10.1016/j.msec.2005.09.052] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Lu HF, Chua KN, Zhang PC, Lim WS, Ramakrishna S, Leong KW, Mao HQ. Three-dimensional co-culture of rat hepatocyte spheroids and NIH/3T3 fibroblasts enhances hepatocyte functional maintenance. Acta Biomater 2005; 1:399-410. [PMID: 16701821 DOI: 10.1016/j.actbio.2005.04.003] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2005] [Revised: 04/07/2005] [Accepted: 04/07/2005] [Indexed: 01/20/2023]
Abstract
Functional maintenance of primary hepatocytes in culture can be improved by several distinct approaches involving optimization of the extracellular matrix microenvironment, media composition and cell-cell interactions, both homotypic and heterotypic. Using a galactose-decorated surface, we have developed a method to combine these two approaches by co-culturing rat primary hepatocyte spheroids with NIH/3T3 mouse fibroblast cells. Spheroids were performed by culturing hepatocytes for 3 days on galactosylated poly(vinylidene difluoride) membrane; NIH/3T3 cells were subsequently seeded and co-cultured with the spheroids. Results showed that although NIH/3T3 cells alone responded poorly to the galactosylated PVDF surface and displayed limited attachment, NIH/3T3 fibroblasts attached to the periphery of the hepatocyte spheroids and proliferated around them. Co-cultured hepatocyte spheroids exhibited significantly higher liver-specific functions as compared to spheroids cultured alone. Albumin secretion level in this co-culture system peaked on day 11, which was 1.8- and 2.9-times higher than the peak expression level in spheroid homo-culture control in serum-free (day 3) and serum-containing media (day 4), respectively. The albumin secretion function was maintained for at least two weeks; it was 5.1 (in serum-free medium) and 17.8 (in serum-containing medium) times higher than spheroid homo-culture on day 13. Similarly, the co-culture system also expressed approximately 5.5- and 3.1-times higher 3-methylcholanthrene-induced cytochrome P450 enzymatic activity on day 14 as compared to the homo-culture control in serum-free and serum-containing medium, respectively. In conclusion, this unique co-culture system demonstrated the synergistic roles of homotypic cell-cell interaction, heterotypic cell-cell interaction, cell-substrate interaction and soluble stimuli in hepatocyte functional maintenance.
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Affiliation(s)
- Hong-Fang Lu
- Division of Biomedical Sciences, Johns Hopkins in Singapore, Singapore
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Immobilization of lactobionic acid on polyurethane films and their interaction with hepatocytes. Macromol Res 2005. [DOI: 10.1007/bf03219061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Seo SJ, Akaike T, Choi YJ, Shirakawa M, Kang IK, Cho CS. Alginate microcapsules prepared with xyloglucan as a synthetic extracellular matrix for hepatocyte attachment. Biomaterials 2005; 26:3607-15. [PMID: 15621251 DOI: 10.1016/j.biomaterials.2004.09.025] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2004] [Accepted: 09/08/2004] [Indexed: 12/29/2022]
Abstract
In this study, xyloglucan (XG) was used as a new synthetic extracellular matrix (ECM) for primary mouse hepatocyte attachment in Ca-alginate (AL) capsules. The rates of hepatocytes adhesion onto collagen type I-, XG-coated and uncoated polystyrene (PS) surface were 89.1%, 91.1% and 25.5%, respectively, at 4 h after incubation at 37 degrees C. From the inhibition study in a cell adhesion assay, the adhesion rates of freshly isolated hepatocytes and preincubated hepatocytes with 20 mm galactose onto the XG-coated surface were 55.7 and 17.3%, respectively, after 30 min incubation at 37 degrees C. Flow cytometric analysis showed that the internalization of XG by freshly isolated hepatocytes was stronger than preincubated hepatocytes with 20 mm galactose. The concentration of XG in AL/XG capsules to perform the best liver-specific functions was 0.5 mg/ml, where the highest albumin secretion rates were obtained. The albumin secretion, ammonia elimination rates and cell viability of hepatocytes were slowly decreased with culture time in AL/XG capsules, whereas those were rapidly decreased in AL capsules, indication of the more rapid formation of hepatocyte spheroids in AL/XG capsules than in AL capsules. More than 70% of the seeded hepatocytes in AL/XG capsules participated in spheroid formation after 2 days, whereas most hepatocytes in AL capsules remained as single cells and only a few cells began to form aggregates after 3 days. Intercellular molecule genes, such as connexin (Cx) 32 and E-cadherin, of hepatocyte spheroids in AL or AL/XG capsules were detected by reverse transcriptase-polymerase chain reaction. Cx32 and E-cadherin genes in AL/XG capsules were more rapidly reexpressed and expressed, respectively, than in AL ones. The results suggest that the multicellular spheroid formation of hepatocytes can enhance the liver-specific functions in the three-dimensional space in the presence of XG as a new synthetic ECM owing to the specific interaction between the galactose moieties of XG and asialoglycoprotein receptors of hepatocytes.
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Affiliation(s)
- Seog-Jin Seo
- School of Agricultural Biotechnology, Seoul National University, Seoul 151-742, South Korea
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Takei R, Seo SJ, Cho CS, Okahata Y, Akaike T. Adsorption behaviors of poly(N-p-vinylbenzyl-4-o-β-d-galactopyranosyl-[1→4]-d-gluconamide) by quartz-crystal microbalance. Colloids Surf B Biointerfaces 2005; 42:137-40. [PMID: 15833665 DOI: 10.1016/j.colsurfb.2005.02.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2005] [Accepted: 02/22/2005] [Indexed: 11/23/2022]
Abstract
Adsorption behaviors of amphiphilic poly(N-p-vinylbenzyl-4-o-beta-d-galactopyranosyl-[1-->4]-d-gluconamide) (PVLA) on the polystyrene (PS) surface was studied using 27 MHz quartz-crystal microbalance (QCM). The amount of adsorbed PVLA on PS surface was increased with an increase of PVLA concentration as a Langmuir-type in a monolayer. The saturated mass change (DeltaM(max)) and association constant (K(a)) of PVLA on PS surface were 498.6 ng/cm(2) and 1.93 x 10(7)M(-1), respectively. The adsorbed PVLA on PS surface was specifically recognized by Allo A lectin due to specific interaction between galactose moieties in the PVLA and Allo A. The hydrophobic interaction between hydrophobic main chain of PVLA and hydrophobic surface of PS was reduced in the presence of urea and the diameter of PVLA aqueous solution was decreased with an increase of urea concentration.
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Affiliation(s)
- R Takei
- Department of Biomolecular Engineering, Tokyo Institute of Technology, Yokohama 226-8501, Japan
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Toh YC, Ng S, Khong YM, Samper V, Yu H. A Configurable Three-Dimensional Microenvironment in a Microfluidic Channel for Primary Hepatocyte Culture. Assay Drug Dev Technol 2005; 3:169-76. [PMID: 15871691 DOI: 10.1089/adt.2005.3.169] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
We have developed a technique for the in situ three-dimensional (3D) immobilization of primary rat hepatocytes within a localized matrix in a microfluidic channel that provides a 3D microenvironment incorporating both a configurable 3D matrix and fluid perfusion. This is based on the laminar flow complex coacervation of a pair of oppositely charged polyelectrolytes, i.e., methylated collagen and a terpolymer of HEMA-MMA-MAA. 3D collagen matrices were formed with minimal gelation times (<8 min), were able to entrap cells under aqueous noncytotoxic conditions, and permitted culture media to be perfused in the microchannel by virtue of the spatial confinement of the 3D matrix on one side of the channel. The architecture and stability of the collagen matrix could be configured by the use of different material combinations and changes in the polyelectrolyte flow rates and retention time. Primary rat hepatocytes cultured for 24 h in the 3D matrix within the microchannel showed comparable or enhanced cytochrome P450 7-ethoxyresorufin-O-deethylation activity with static controls. The configurable 3D microenvironment in the microfluidic channel may be a potential 3D culture model of primary hepatocytes for drug testing applications.
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Affiliation(s)
- Yi-Chin Toh
- Institute of Bioengineering and Nanotechnology, Singapore
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Park IK, Jiang HL, Cook SE, Cho MH, Kim SI, Jeong HJ, Akaike T, Cho CS. Galactosylated chitosan (GC)-graft-poly(vinyl pyrrolidone) (PVP) as hepatocyte-targeting DNA carrier:in vitro transfection. Arch Pharm Res 2004; 27:1284-9. [PMID: 15648108 DOI: 10.1007/bf02975895] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Galactosylated chitosan-graft-poly(vinyl pyrrolidone) (GCPVP) was synthesized and characterized for hepatocyte-targeting gene carrier. GCPVP itself as well as GCPVP/DNA complex had negligible cytotoxicity regardless of the concentration of GCPVP and the charge ratio, but GCPVP/DNA complex had slightly cytotoxic effect on HepG2 cells only in the case of the higher charge ratio and 20 mM of Ca2+ concentration used. Through the confocal laser scanning microscopy, it is shown that the endocytosis by interaction between galactose ligands of GCPVP and ASGPR of the hepatocytes was the major route of transfection of GCPVP/F-plasmid complexes.
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Affiliation(s)
- In-Kyu Park
- School of Agricultural Biotechnology, Seoul National University, Seoul 151-742, Korea
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Kim SH, Hoshiba T, Akaike T. Hepatocyte behavior on synthetic glycopolymer matrix: inhibitory effect of receptor–ligand binding on hepatocyte spreading. Biomaterials 2004; 25:1813-23. [PMID: 14738845 DOI: 10.1016/j.biomaterials.2003.08.035] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The interaction of carbohydrate-based polymers with asialoglycoprotein receptors (ASGPRs) on the surface of hepatocytes has been used to design hepatocyte adhesion matrices. Therefore, we have characterized the interaction of ASGPR on the surface of hepatocytes with glycopolymer-coated surfaces. Since ASGPRs bound to glycopolymer surfaces escape from internalization and degradation, they were quantified by western blot analysis. The amount of hepatocyte ASGPRs that initially adhered to the glycopolymer surface was proportional to the concentration of the coated glycopolymer. We found that the initial adhesion of hepatocytes to the glycopolymer surface was enhanced by interactions with ASGPR, whereas interactions with ASGPR inhibited the post-adhesion process, a cell adhesion phenomenon that occurs following the initial adhesion. Furthermore, hepatocytes are much more spread on glycopolymer surfaces with lower coating density. Taken together, we suggest that the post-adhesion process triggered hepatocyte spreading on glycopolymer surfaces, and ASGPR-carbohydrate interactions act negatively on the post-adhesion mechanism as well as on hepatocyte spreading on glycopolymer surfaces depending on the density of coated glycopolymers.
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Affiliation(s)
- Sang-Heon Kim
- Department of Biomolecular Engineering, Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, 226-8501, Yokohama, Japan
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Kim SH, Hoshiba T, Akaike T. Effect of carbohydrates attached to polystyrene on hepatocyte morphology on sugar‐derivatized polystyrene matrices. J Biomed Mater Res A 2003; 67:1351-9. [PMID: 14624522 DOI: 10.1002/jbm.a.10166] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Sugar-carrying polymers have been utilized as artificial matrices for cell adhesion in tissue engineering. We have developed sugar-derivatized polystyrenes (PV-sugars) as artificial matrices, which control hepatocyte adhesion and hepatic function. Hepatocytes adhere to PV-sugar matrices in a receptor-mediated manner. In this study, we designed a new galactose-derivatized PV-sugar, poly-(6-O-p-vinylbenzyl-alpha-D-galactose) (PV6Gal) and evaluated the role of carbohydrate attached to polystyrene (PS) backbone in the morphological difference of hepatocyte cultured on PV-sugar matrices. Hepatocytes spread on monosaccharide-derivatized PV-sugars but not on disaccharide-derivatized PV-sugars. The actin filament remained aggregated in the central area of the cell body on disaccharide-derivatized PV-sugars. Hepatocyte cell bodies fully were spread on collagen, and the actin filament was almost completely reorganized. Hepatocyte spreading on monosaccharide-derivatized PV-sugars, however, was caused by protrusive cell-matrix contact like lamellipodia and the actin filament was not completely reorganized. This indicated that hepatocyte spreading on PV-sugar matrices was restricted compared with ECM-mediated cell spreading. In addition, typical spheroid formation of hepatocytes was promoted on disaccharide-derivatized PV-sugars compared with monosaccharide-derivatized PV-sugars. Although hepatocytes adhered with different affinities to PV-sugar matrices, hepatocyte morphology was not affected by the adhesion affinity. We suggest that the type of carbohydrate attached to the PS backbone governs the morphology of hepatocyte cultured on PV-sugar matrices.
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Affiliation(s)
- Sang-Heon Kim
- Department of Biomolecular Engineering, Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8501, Japan
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Hersel U, Dahmen C, Kessler H. RGD modified polymers: biomaterials for stimulated cell adhesion and beyond. Biomaterials 2003; 24:4385-415. [PMID: 12922151 DOI: 10.1016/s0142-9612(03)00343-0] [Citation(s) in RCA: 1731] [Impact Index Per Article: 82.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Since RGD peptides (R: arginine; G: glycine; D: aspartic acid) have been found to promote cell adhesion in 1984 (Cell attachment activity of fibronectin can be duplicated by small synthetic fragments of the molecule, Nature 309 (1984) 30), numerous materials have been RGD functionalized for academic studies or medical applications. This review gives an overview of RGD modified polymers, that have been used for cell adhesion, and provides information about technical aspects of RGD immobilization on polymers. The impacts of RGD peptide surface density, spatial arrangement as well as integrin affinity and selectivity on cell responses like adhesion and migration are discussed.
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Affiliation(s)
- Ulrich Hersel
- Institut für Organische Chemie und Biochemie, Technische Universität München, Lichtenbergstr. 4, D-85747, Garching, Germany
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Kim SH, Kim JH, Akaike T. Regulation of cell adhesion signaling by synthetic glycopolymer matrix in primary cultured hepatocyte. FEBS Lett 2003; 553:433-9. [PMID: 14572665 DOI: 10.1016/s0014-5793(03)01047-0] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Control of cell-matrix interactions is a central principle for the design of biomaterial in tissue engineering. In this study, we evaluated a synthetic glycopolymer, which is recognized by the asialoglycoprotein receptor (ASGPR) expressed on the surface of hepatocytes, as an artificial matrix to regulate integrin-mediated signaling. The phosphorylation of focal adhesion kinase was restricted in hepatocytes cultured on the glycopolymer compared with fibronectin. In addition, there was no reorganization of cytoskeleton-related proteins such as actin filaments, microtubules, and vinculin in hepatocytes cultured on the glycopolymer. DNA synthesis and cyclin D1 expression were suppressed in hepatocytes grown on the glycopolymer as compared with those grown on fibronectin and collagen. The data suggest that the glycopolymer will be a good artificial matrix to regulate integrin-mediated signaling and cell growth through the unique ASGPR-carbohydrate interaction.
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Affiliation(s)
- Sang-Heon Kim
- Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, 226-8501 Yokohama, Japan
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Wolfson M, Piraino B, Hamburger RJ, Morton AR. A randomized controlled trial to evaluate the efficacy and safety of icodextrin in peritoneal dialysis. Am J Kidney Dis 2002; 40:1055-65. [PMID: 12407652 DOI: 10.1053/ajkd.2002.36344] [Citation(s) in RCA: 106] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND This article presents the results of two randomized, double-blind, controlled studies conducted to compare the efficacy and long-term safety of icodextrin and 2.5% dextrose for the once-daily long dwell in continuous ambulatory peritoneal dialysis (CAPD) and automated peritoneal dialysis (APD). METHODS Both studies were active-control comparisons of 7.5% icodextrin and 2.5% dextrose for the once-daily long dwell. The efficacy study was a 4-week evaluation of net ultrafiltration and peritoneal clearances of creatinine and urea nitrogen in 175 CAPD patients. The 52-week study in CAPD and APD patients examined the long-term safety of icodextrin and longer term effects, such as body weight and quality of life. RESULTS Mean net ultrafiltration (587.2 versus 346.2 mL, P < 0.001) and clearances of urea nitrogen (4.5 versus 4.1 mL/min, P < 0.001) and creatinine (4.0 versus 3.5 mL/min, P < 0.001) were increased significantly with icodextrin. Patients receiving icodextrin had no increase in weight after 52 weeks, in contrast to a weight gain of almost 2 kg in the dextrose group (P < 0.05). There were significantly fewer patients reporting edema in the icodextrin group compared with the dextrose group (6.3% versus 17.9%, P < 0.01). There were no statistically significant differences between groups for the incidence and severity of adverse events. There were small decreases in sodium and chloride and increases in alkaline phosphatase with icodextrin. CONCLUSION Icodextrin provides patients with greater fluid removal and small solute clearance, no weight gain over 52 weeks, and a decreased risk of edema.
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Affiliation(s)
- Marsha Wolfson
- Renal Division, Baxter Healthcare Corporation, McGaw Park, IL 60085-6730, USA.
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Gokal R, Moberly J, Lindholm B, Mujais S. Metabolic and laboratory effects of icodextrin. KIDNEY INTERNATIONAL. SUPPLEMENT 2002:S62-71. [PMID: 12230483 DOI: 10.1046/j.1523-1755.62.s81.9.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Ram Gokal
- Manchester Royal Infirmary, Manchester, England, United Kingdom
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