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Aydin O, Tiruchinapally G, Youssef I, Ramaraju H, Durmaz YY, Kozloff K, Kohn D, ElSayed M. Selective Binding of pVTK Peptide- and Bisphosphonate-Functionalized Micelles to Prostate Cancer Cells, Osteoblasts, and Osteoclasts. Precision Nanomedicine 2022. [DOI: 10.33218/001c.33142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Omer Aydin
- Erciyes University, Talas, Kayseri, 38039, Turkey
| | | | | | | | | | | | - David Kohn
- a University of Michigan, Ann Arbor, MI, 48109, USA
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2
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Annamalai RT, Hong X, Schott NG, Tiruchinapally G, Levi B, Stegemann JP. Injectable osteogenic microtissues containing mesenchymal stromal cells conformally fill and repair critical-size defects. Biomaterials 2019; 208:32-44. [PMID: 30991216 PMCID: PMC6500486 DOI: 10.1016/j.biomaterials.2019.04.001] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 03/28/2019] [Accepted: 04/01/2019] [Indexed: 12/18/2022]
Abstract
Repair of complex fractures with bone loss requires a potent, space-filling intervention to promote regeneration of bone. We present a biomaterials-based strategy combining mesenchymal stromal cells (MSC) with a chitosan-collagen matrix to form modular microtissues designed for delivery through a needle to conformally fill cavital defects. Implantation of microtissues into a calvarial defect in the mouse showed that osteogenically pre-differentiated MSC resulted in complete bridging of the cavity, while undifferentiated MSC produced mineralized tissue only in apposition to native bone. Decreasing the implant volume reduced bone regeneration, while increasing the MSC concentration also attenuated bone formation, suggesting that the cell-matrix ratio is important in achieving a robust response. Conformal filling of the defect with microtissues in a carrier gel resulted in complete healing. Taken together, these results show that modular microtissues can be used to augment the differentiated function of MSC and provide an extracellular environment that potentiates bone repair.
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Affiliation(s)
- Ramkumar T Annamalai
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, United States
| | - Xiaowei Hong
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, United States
| | - Nicholas G Schott
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, United States
| | | | - Benjamin Levi
- Department of Surgery, University of Michigan, Ann Arbor, United States
| | - Jan P Stegemann
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, United States.
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3
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Kaushal N, Tiruchinapally G, Durmaz YY, Bao L, Gilani R, Merajver SD, ElSayed MEH. Synergistic inhibition of aggressive breast cancer cell migration and invasion by cytoplasmic delivery of anti-RhoC silencing RNA and presentation of EPPT1 peptide on "smart" particles. J Control Release 2018; 289:79-93. [PMID: 30149048 DOI: 10.1016/j.jconrel.2018.07.042] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 07/27/2018] [Indexed: 01/05/2023]
Abstract
Overexpression of RhoC protein in breast cancer patients has been linked to increased cancer cell invasion, migration, and metastases. Suppressing RhoC expression in aggressive breast cancer cells using silencing RNA (siRNA) molecules is a viable strategy to inhibit the metastatic spread of breast cancer. In this report, we describe the synthesis of a series of asymmetric pH-sensitive, membrane-destabilizing polymers engineered to complex anti-RhoC siRNA molecules forming "smart" nanoparticles. Using β-CD as the particle core, polyethylene glycol (PEG) chains were conjugated to the primary face via non-cleavable bonds and amphiphilic polymers incorporating hydrophobic and cationic monomers were grafted to the secondary face via acid-labile linkages. We investigated the effect of PEG molecular weight (2 & 5 kDa) on transfection capacity and serum stability of the formed particles. We evaluated the efficacy of EPPT1 peptides presented on the free tips of the PEG brush to function as a targeting ligand against underglycosylated MUC1 (uMUC1) receptors overexpressed on the surface of metastatic breast cancer cells. Results show that "smart" nanoparticles successfully delivered anti-RhoC siRNA into the cytoplasm of aggressive SUM149 and MDA-MB-231 breast cancer cells, which resulted in a dose-dependent inhibition of cell migration and invasion. Further, EPPT1-targeted nanoparticles demonstrate a synergistic inhibition of cell migration and invasion imparted via RhoC knockdown and EPPT1-mediated signaling via the uMUC1 receptor.
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Affiliation(s)
- Neha Kaushal
- University of Michigan, College of Engineering, Department of Biomedical Engineering, Cellular Engineering & Nano-Therapeutics Laboratory, Ann Arbor, MI 48109, USA
| | - Gopinath Tiruchinapally
- University of Michigan, College of Engineering, Department of Biomedical Engineering, Cellular Engineering & Nano-Therapeutics Laboratory, Ann Arbor, MI 48109, USA
| | - Yasemin Yuksel Durmaz
- Istanbul Medipol University, School of Engineering and Natural Sciences, Department of Biomedical Engineering, 34810 Istanbul, Turkey
| | - LiWei Bao
- University of Michigan, School of Medicine, Department of Internal Medicine, Ann Arbor, MI 48109, USA
| | - Rabia Gilani
- University of Michigan, School of Medicine, Department of Internal Medicine, Ann Arbor, MI 48109, USA
| | - Sofia D Merajver
- University of Michigan, School of Medicine, Department of Internal Medicine, Ann Arbor, MI 48109, USA
| | - Mohamed E H ElSayed
- University of Michigan, College of Engineering, Department of Biomedical Engineering, Cellular Engineering & Nano-Therapeutics Laboratory, Ann Arbor, MI 48109, USA; University of Michigan, Macromolecular Science and Engineering Program, 2300 Hayward Avenue, Ann Arbor, MI 48109, USA.
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Kuruvilla SP, Tiruchinapally G, Kaushal N, ElSayed ME. Effect of N-acetylgalactosamine ligand valency on targeting dendrimers to hepatic cancer cells. Int J Pharm 2018; 545:27-36. [DOI: 10.1016/j.ijpharm.2018.04.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 02/28/2018] [Accepted: 04/13/2018] [Indexed: 12/21/2022]
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5
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Kuruvilla SP, Tiruchinapally G, ElAzzouny M, ElSayed MEH. N-Acetylgalactosamine-Targeted Delivery of Dendrimer-Doxorubicin Conjugates Influences Doxorubicin Cytotoxicity and Metabolic Profile in Hepatic Cancer Cells. Adv Healthc Mater 2017; 6. [PMID: 28085993 DOI: 10.1002/adhm.201601046] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 11/25/2016] [Indexed: 12/28/2022]
Abstract
This study describes the development of targeted, doxorubicin (DOX)-loaded generation 5 (G5) polyamidoamine dendrimers able to achieve cell-specific DOX delivery and release into the cytoplasm of hepatic cancer cells. G5 is functionalized with poly(ethylene glycol) (PEG) brushes displaying N-acetylgalactosamine (NAcGal) ligands to target hepatic cancer cells. DOX is attached to G5 through one of two aromatic azo-linkages, L3 or L4, achieving either P1 ((NAcGalβ -PEGc)16.6 -G5-(L3-DOX)11.6 ) or P2 ((NAcGalβ -PEGc)16.6 -G5-(L4-DOX)13.4 ) conjugates. After confirming the conjugates' biocompatibility, flow cytometry studies show P1/P2 achieve 100% uptake into hepatic cancer cells at 30-60 × 10-9 m particle concentration. This internalization correlates with cytotoxicity against HepG2 cells with 50% inhibitory concentration (IC50 ) values of 24.8, 1414.0, and 237.8 × 10-9 m for free DOX, P1, and P2, respectively. Differences in cytotoxicity prompted metabolomics analysis to identify the intracellular release behavior of DOX. Results show that P1/P2 release alternative DOX metabolites than free DOX. Stable isotope tracer studies show that the different metabolites induce different effects on metabolic cycles. Namely, free DOX reduces glycolysis and increases fatty acid oxidation, while P1/P2 increase glycolysis, likely as a response to high oxidative stress. Overall, P1/P2 conjugates offer a platform drug delivery technology for improving hepatic cancer therapy.
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Affiliation(s)
- Sibu P. Kuruvilla
- Department of Materials Science and Engineering University of Michigan 2300 Hayward St. Ann Arbor MI 48109 USA
| | - Gopinath Tiruchinapally
- Department of Biomedical Engineering University of Michigan 1101 Beal Avenue Ann Arbor MI 48109 USA
| | - Mahmoud ElAzzouny
- Department of Internal Medicine University of Michigan Medical School 1500 East Medical Center Drive Ann Arbor MI 48109 USA
| | - Mohamed E. H. ElSayed
- Department of Biomedical Engineering University of Michigan 1101 Beal Avenue Ann Arbor MI 48109 USA
- Department of Macromolecular Science and Engineering University of Michigan 2300 Hayward Avenue Ann Arbor MI 48109 USA
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6
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Carrion B, Souzanchi MF, Wang VT, Tiruchinapally G, Shikanov A, Putnam AJ, Coleman RM. The Synergistic Effects of Matrix Stiffness and Composition on the Response of Chondroprogenitor Cells in a 3D Precondensation Microenvironment. Adv Healthc Mater 2016; 5:1192-202. [PMID: 26959641 DOI: 10.1002/adhm.201501017] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 01/24/2016] [Indexed: 01/10/2023]
Abstract
Improve functional quality of cartilage tissue engineered from stem cells requires a better understanding of the functional evolution of native cartilage tissue. Therefore, a biosynthetic hydrogel was developed containing RGD, hyaluronic acid and/or type-I collagen conjugated to poly(ethylene glycol) acrylate to recapitulate the precondensation microenvironment of the developing limb. Conjugation of any combination of the three ligands did not alter the shear moduli or diffusion properties of the PEG hydrogels; thus, the influence of ligand composition on chondrogenesis could be investigated in the context of varying matrix stiffness. Gene expression of ligand receptors (CD44 and the b1-integrin) as well as markers of condensation (cell clustering and N-cadherin gene expression) and chondrogenesis (Col2a1 gene expression and sGAG production) by chondroprogenitor cells in this system were modulated by both matrix stiffness and ligand composition, with the highest gene expression occurring in softer hydrogels containing all three ligands. Cell proliferation in these 3D matrices for 7 d prior to chondrogenic induction increased the rate of sGAG production in a stiffness-dependent manner. This biosynthetic hydrogel supports the features of early limb-bud condensation and chondrogenesis and is a novel platform in which the influence of the matrix physicochemical properties on these processes can be elucidated.
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Affiliation(s)
- Bita Carrion
- Biomedical Engineering; University of Michigan; Ann Arbor 48109 USA
| | | | | | | | - Ariella Shikanov
- Biomedical Engineering; University of Michigan; Ann Arbor 48109 USA
| | - Andrew J. Putnam
- Biomedical Engineering; University of Michigan; Ann Arbor 48109 USA
| | - Rhima M. Coleman
- Biomedical Engineering; University of Michigan; Ann Arbor 48109 USA
- Mechanical Engineering; University of Michigan; Ann Arbor 48109 USA
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7
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Aydin O, Youssef I, Yuksel Durmaz Y, Tiruchinapally G, ElSayed MEH. Formulation of Acid-Sensitive Micelles for Delivery of Cabazitaxel into Prostate Cancer Cells. Mol Pharm 2016; 13:1413-29. [DOI: 10.1021/acs.molpharmaceut.6b00147] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Omer Aydin
- Cellular Engineering & Nano-Therapeutics Laboratory, Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Ibrahim Youssef
- Cellular Engineering & Nano-Therapeutics Laboratory, Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department
of Chemistry, Faculty of Science, Mansoura University, Mansoura ET-35516, Egypt
| | - Yasemin Yuksel Durmaz
- Cellular Engineering & Nano-Therapeutics Laboratory, Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department
of Biomedical Engineering, School of Engineering and Natural Sciences, Istanbul Medipol University, Istanbul, 34810, Turkey
| | - Gopinath Tiruchinapally
- Cellular Engineering & Nano-Therapeutics Laboratory, Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Mohamed E. H. ElSayed
- Cellular Engineering & Nano-Therapeutics Laboratory, Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Macromolecular
Science and Engineering Program, University of Michigan, Ann Arbor, Michigan 48109, United States
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8
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Dulaney S, Xu Y, Wang P, Tiruchinapally G, Wang Z, Kathawa J, El-Dakdouki MH, Yang B, Liu J, Huang X. Divergent Synthesis of Heparan Sulfate Oligosaccharides. J Org Chem 2015; 80:12265-79. [PMID: 26574650 PMCID: PMC4685427 DOI: 10.1021/acs.joc.5b02172] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Indexed: 12/01/2022]
Abstract
Heparan sulfates are implicated in a wide range of biological processes. A major challenge in deciphering their structure and activity relationship is the synthetic difficulties to access diverse heparan sulfate oligosaccharides with well-defined sulfation patterns. In order to expedite the synthesis, a divergent synthetic strategy was developed. By integrating chemical synthesis and two types of O-sulfo transferases, seven different hexasaccharides were obtained from a single hexasaccharide precursor. This approach combined the flexibility of chemical synthesis with the selectivity of enzyme-catalyzed sulfations, thus simplifying the overall synthetic operations. In an attempt to establish structure activity relationships of heparan sulfate binding with its receptor, the synthesized oligosaccharides were incorporated onto a glycan microarray, and their bindings with a growth factor FGF-2 were examined. The unique combination of chemical and enzymatic approaches expanded the capability of oligosaccharide synthesis. In addition, the well-defined heparan sulfate structures helped shine light on the fine substrate specificities of biosynthetic enzymes and confirm the potential sequence of enzymatic reactions in biosynthesis.
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Affiliation(s)
- Steven
B. Dulaney
- Department
of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, Michigan 48824, United States
| | - Yongmei Xu
- Division
of Medicinal Chemistry and Natural Products, UNC Eshelman School of
Pharmacy, University of North Carolina, Chapel Hill, North Carolina 27599, United States
| | - Peng Wang
- Department
of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, Michigan 48824, United States
| | - Gopinath Tiruchinapally
- Department
of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, Michigan 48824, United States
| | - Zhen Wang
- Department
of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, Michigan 48824, United States
| | - Jolian Kathawa
- Department
of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, Michigan 48824, United States
| | - Mohammad H. El-Dakdouki
- Department
of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, Michigan 48824, United States
- Department
of Chemistry, Beirut Arab University, P.O. Box 11-5020, Riad El Solh 11072809, Beirut, Lebanon
| | - Bo Yang
- Department
of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, Michigan 48824, United States
| | - Jian Liu
- Division
of Medicinal Chemistry and Natural Products, UNC Eshelman School of
Pharmacy, University of North Carolina, Chapel Hill, North Carolina 27599, United States
| | - Xuefei Huang
- Department
of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, Michigan 48824, United States
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9
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Medina SH, Tiruchinapally G, Chevliakov MV, Durmaz YY, Stender RN, Ensminger WD, Shewach DS, Elsayed MEH. Targeting hepatic cancer cells with pegylated dendrimers displaying N-acetylgalactosamine and SP94 peptide ligands. Adv Healthc Mater 2013; 2:1337-50. [PMID: 23554387 DOI: 10.1002/adhm.201200406] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Revised: 01/25/2013] [Indexed: 12/13/2022]
Abstract
Poly(amidoamine) (PAMAM) dendrimers are branched water-soluble polymers defined by consecutive generation numbers (Gn) indicating a parallel increase in size, molecular weight, and number of surface groups available for conjugation of bioactive agents. In this article, we compare the biodistribution of N-acetylgalactosamine (NAcGal)-targeted [(14) C]1 -G5-(NH2 )5 -(Ac)108 -(NAcGal)14 particles to non-targeted [(14) C]1 -G5-(NH2 )127 and PEGylated [(14) C]1 -G5-(NH2 )44 -(Ac)73 -(PEG)10 particles in a mouse hepatic cancer model. Results show that both NAcGal-targeted and non-targeted particles are rapidly cleared from the systemic circulation with high distribution to the liver. However, NAcGal-targeted particles exhibited 2.5-fold higher accumulation in tumor tissue compared to non-targeted ones. In comparison, PEGylated particles showed a 16-fold increase in plasma residence time and a 5-fold reduction in liver accumulation. These results motivated us to engineer new PEGylated G5 particles with PEG chains anchored to the G5 surface via acid-labile cis-aconityl linkages where the free PEG tips are functionalized with NAcGal or SP94 peptide to investigate their potential as targeting ligands for hepatic cancer cells as a function of sugar conformation (α versus β), ligand concentration (100-4000 nM), and incubation time (2 and 24 hours) compared to fluorescently (Fl)-labeled and non-targeted G5-(Fl)6 -(NH2 )122 and G5-(Fl)6 -(Ac)107 -(cPEG)15 particles. Results show G5-(Fl)6 -(Ac)107 -(cPEG[NAcGalβ ])14 particles achieve faster uptake and higher intracellular concentrations in HepG2 cancer cells compared to other G5 particles while escaping the non-specific adsorption of serum protein and phagocytosis by Kupffer cells, which make these particles the ideal carrier for selective drug delivery into hepatic cancer cells.
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Affiliation(s)
- Scott H Medina
- University of Michigan, Department of Biomedical Engineering, 1101 Beal Avenue, Lurie Biomedical Engineering Building, Room 2150, Ann Arbor, MI 48109, USA, Web: www.bme.umich.edu/centlab.php
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10
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Abstract
Traditional chemical synthesis of heparin oligosaccharides first involves assembly of the full length oligosaccharide backbone followed by sulfation. Herein, we report an alternative strategy in which the O-sulfate was introduced onto glycosyl building blocks as a trichloroethyl ester prior to assembly of the full length oligosaccharide. This allowed divergent preparation of both sulfated and non-sulfated building blocks from common advanced intermediates. The O-sulfate esters were found to be stable during glycosylation as well as typical synthetic manipulations encountered during heparin oligosaccharide synthesis. Furthermore, the presence of sulfate esters in both glycosyl donors and acceptors did not adversely affect the glycosylation yields, which enabled us to assemble multiple heparin oligosaccharides with preinstalled 6-O-sulfates.
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Affiliation(s)
| | - Zhaojun Yin
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA)
| | - Mohammad El-Dakdouki
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA)
| | - Zhen Wang
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA)
| | - Xuefei Huang
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA)
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11
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Wang Z, Xu Y, Yang B, Tiruchinapally G, Sun B, Liu R, Dulaney S, Liu J, Huang X. Preactivation-based, one-pot combinatorial synthesis of heparin-like hexasaccharides for the analysis of heparin-protein interactions. Chemistry 2010; 16:8365-75. [PMID: 20623566 PMCID: PMC3094016 DOI: 10.1002/chem.201000987] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Heparin (HP) and heparan sulfate (HS) play important roles in many biological events. Increasing evidence has shown that the biological functions of HP and HS can be critically dependent upon their precise structures, including the position of the iduronic acids and sulfation patterns. However, unraveling the HP code has been extremely challenging due to the enormous structural variations. To overcome this hurdle, we investigated the possibility of assembling a library of HP/HS oligosaccharides using a preactivation-based, one-pot glycosylation method. A major challenge in HP/HS oligosaccharide synthesis is stereoselectivity in the formation of the cis-1,4-linkages between glucosamine and the uronic acid. Through screening, suitable protective groups were identified on the matching glycosyl donor and acceptor, leading to stereospecific formation of both the cis-1,4- and trans-1,4-linkages present in HP. The protective group chemistry designed was also very flexible. From two advanced thioglycosyl disaccharide intermediates, all of the required disaccharide modules for library preparation could be generated in a divergent manner, which greatly simplified building-block preparation. Furthermore, the reactivity-independent nature of the preactivation-based, one-pot approach enabled us to mix the building blocks. This allowed rapid assembly of twelve HP/HS hexasaccharides with systematically varied and precisely controlled backbone structures in a combinatorial fashion. The speed and the high yields achieved in glycoassembly without the need to use a large excess of building blocks highlighted the advantages of our approach, which can be of general use to facilitate the study of HP/HS biology. As a proof of principle, this panel of hexasaccharides was used to probe the effect of backbone sequence on binding with the fibroblast growth factor-2 (FGF-2). A trisaccharide sequence of 2-O-sulfated iduronic acid flanked by N-sulfated glucosamines was identified to be the minimum binding motif and N-sulfation was found to be critical. This provides useful information for further development of more potent compounds towards FGF-2 binding, which can have potential applications in wound healing and anticancer therapy.
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Affiliation(s)
- Zhen Wang
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA)
| | - Yongmei Xu
- Division of Medicinal Chemistry and Natural Products, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599 (USA)
| | - Bo Yang
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA)
| | | | - Bin Sun
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA)
| | - Renpeng Liu
- Division of Medicinal Chemistry and Natural Products, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599 (USA)
| | - Steven Dulaney
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA)
| | - Jian Liu
- Division of Medicinal Chemistry and Natural Products, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599 (USA)
| | - Xuefei Huang
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA)
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12
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Wang Z, Xu Y, Yang B, Tiruchinapally G, Sun B, Liu R, Dulaney S, Liu J, Huang X. Inside Cover: Preactivation-Based, One-Pot Combinatorial Synthesis of Heparin-like Hexasaccharides for the Analysis of Heparin-Protein Interactions (Chem. Eur. J. 28/2010). Chemistry 2010. [DOI: 10.1002/chem.201090136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Yatawara AK, Tiruchinapally G, Bordenyuk AN, Andreana PR, Benderskii AV. Carbohydrate surface attachment characterized by sum frequency generation spectroscopy. Langmuir 2009; 25:1901-1904. [PMID: 19140705 DOI: 10.1021/la803113h] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Covalent surface attachment of carbohydrate moieties using maleimide-sulfhydril reaction was characterized by surface-selective vibrational sum-frequency generation (VSFG) spectroscopy. The comparative VSFG spectra of the precursor maleimide-terminated SAM and the product glucose adlayer reveal the high efficiency of the surface coupling reaction (>90%) and the details of the molecular organization of the formed carbohydrate adlayer. The glucose groups are orientationally well ordered, as judged by their sharp C-H stretch bands. The chemical structure of the linker can significantly affect the orientation of the carbohydrate moiety at the surface. Two alkanethiol linkers of different chain lengths (11 and 16 carbons) yield similar orientations of the glucose in the adlayer whereas the cysteine-containing linker produces markedly different relative peak intensities of the glucose C-H stretch bands in the VSFG spectra, suggesting a significantly different orientation with respect to the surface plane.
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Affiliation(s)
- Achani K Yatawara
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA
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14
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Tiruchinapally G, Zemlicka J. New Synthesis of 2,2‐Bis(hydroxymethyl) methylenecyclopropane, a Key Intermediate for Antiviral Cyclopropavir. SYNTHETIC COMMUN 2008. [DOI: 10.1080/00397910701818651] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Gopinath Tiruchinapally
- a Developmental Therapeutics Program , Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine , Detroit, Michigan, USA
| | - Jiri Zemlicka
- a Developmental Therapeutics Program , Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine , Detroit, Michigan, USA
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