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Zhao S, Yang Y, Wang Y, Liu H, Ju H, Chen Y. In situ evaluation of in vivo sialylation with a dual-color imaging strategy. Chem Commun (Camb) 2023; 59:7815-7818. [PMID: 37272281 DOI: 10.1039/d3cc01949g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This work designs a functional dendrimer probe to conveniently identify newly generated sialic acid groups in vivo with a dual-color imaging strategy, which achieves in situ semiquantitative evaluation of the sialylation difference between tumor and normal tissues to reveal sialylation-related biological events and promote clinical tumor diagnosis.
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Affiliation(s)
- Shiya Zhao
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
| | - Yuanjiao Yang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
| | - Yuru Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
| | - Huipu Liu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
| | - Huangxian Ju
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
| | - Yunlong Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
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2
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Li H, Yin D, Liao J, Wang Y, Gou R, Tang C, Li W, Liu Y, Fu J, Shi S, Zou L. Regulation of protein corona on liposomes using albumin-binding peptide for targeted tumor therapy. J Control Release 2023; 355:593-603. [PMID: 36773961 DOI: 10.1016/j.jconrel.2023.02.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 01/30/2023] [Accepted: 02/01/2023] [Indexed: 02/13/2023]
Abstract
Nanocarriers entering the body are usually coated by plasma protein, leading to a protein "corona" easily recognized by tissues and cells. Adjusting the composition of protein coronas may be an efficient way to change the properties and behavior of nanoparticles in vivo. In this study, we modified doxorubicin-loaded liposomes (Lip/DOX) with an albumin-binding domain (ABD) to prepare nanoparticles (ABD-Lip/DOX) that can specifically bind to albumin and form albumin-based protein coronas in vivo for targeted tumor therapy. The prepared liposomes were spherical with a particle size of about 100 nm. After incubating the liposomes with rat serum, the albumin content was eight times higher on ABD-Lip than on control liposomes. ABD-Lip significantly inhibited adsorption of IgG and complement activation in rat serum in vitro, while corona-coated ABD-Lip was internalized to a significantly greater extent than corona-coated control liposomes. In addition, ABD-Lip showed longer blood circulation time, higher tumor accumulation and greater antitumor efficacy than control liposomes in mice bearing 4 T1 tumors, while both liposome formulations showed similar biocompatibility. These results confirm that adjusting the component of protein coronas around nanoparticles can improve their therapeutic efficacy.
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Affiliation(s)
- Hanmei Li
- Key Laboratory of Coarse Cereal Processing, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Dan Yin
- Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Jiaying Liao
- Key Laboratory of Coarse Cereal Processing, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Yao Wang
- Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Rui Gou
- Key Laboratory of Coarse Cereal Processing, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Chuane Tang
- Key Laboratory of Coarse Cereal Processing, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Wei Li
- School of Preclinical Medicine, Chengdu University, Chengdu, 610106, China
| | - Yi Liu
- Key Disciplines of Clinical Pharmacy, Affiliated Hospital and Clinical Medical College of Chengdu University, Chengdu 610081, China
| | - Jiao Fu
- Key Laboratory of Coarse Cereal Processing, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Sanjun Shi
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Liang Zou
- Key Laboratory of Coarse Cereal Processing, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China.
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3
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Raju M, Kavarthapu R, Anbazhagan R, Hassan SA, Dufau ML. Blockade of GRTH/DDX25 Phosphorylation by Cyclic Peptides Provides an Avenue for Developing a Nonhormonal Male Contraceptive. J Med Chem 2021; 64:14715-14727. [PMID: 34601876 DOI: 10.1021/acs.jmedchem.1c01201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Gonadotropin-regulated testicular RNA helicase (GRTH)/DDX25 is a DEAD-box RNA helicase essential for the completion of spermatogenesis. Our previous studies indicated that blocking the GRTH phospho-site or perturbing the GRTH/protein kinase A (PKA) interface could provide an avenue for developing a nonhormonal male contraceptive. In this study, cyclic peptides were rationally designed and synthesized as promising therapeutic agents. The peptides showed effective delivery into COS-1 and germ cells and a dose-dependent inhibitory effect on GRTH phosphorylation. The peptides inhibit GRTH phosphorylation in the presence of PKA, and binding to the helicase resulted in thermal stabilization of non-phospho GRTH. Increased efficiency in fluorescence resonance energy transfer (FRET) assay revealed their interaction with GRTH. Cyclic peptide exposure of cultures from mice seminiferous tubules resulted in significant inhibition of phospho GRTH. These peptides did not exhibit toxicity. Effective delivery and targeted decrease of in vitro expression of phospho GRTH by cyclic peptides provide a promising angle to develop effective compounds as a nonhormonal male contraceptive.
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Affiliation(s)
- Murugananthkumar Raju
- Section on Molecular Endocrinology, Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, Maryland 20892, United States
| | - Raghuveer Kavarthapu
- Section on Molecular Endocrinology, Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, Maryland 20892, United States
| | - Rajakumar Anbazhagan
- Section on Molecular Endocrinology, Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, Maryland 20892, United States
| | - Sergio A Hassan
- Bioinformatics and Computational Biosciences Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Maria L Dufau
- Section on Molecular Endocrinology, Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, Maryland 20892, United States
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4
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Cellular and Molecular Engineering of Glycan Sialylation in Heterologous Systems. Molecules 2021; 26:molecules26195950. [PMID: 34641494 PMCID: PMC8512710 DOI: 10.3390/molecules26195950] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 09/26/2021] [Accepted: 09/27/2021] [Indexed: 02/05/2023] Open
Abstract
Glycans have been shown to play a key role in many biological processes, such as signal transduction, immunogenicity, and disease progression. Among the various glycosylation modifications found on cell surfaces and in biomolecules, sialylation is especially important, because sialic acids are typically found at the terminus of glycans and have unique negatively charged moieties associated with cellular and molecular interactions. Sialic acids are also crucial for glycosylated biopharmaceutics, where they promote stability and activity. In this regard, heterogenous sialylation may produce variability in efficacy and limit therapeutic applications. Homogenous sialylation may be achieved through cellular and molecular engineering, both of which have gained traction in recent years. In this paper, we describe the engineering of intracellular glycosylation pathways through targeted disruption and the introduction of carbohydrate active enzyme genes. The focus of this review is on sialic acid-related genes and efforts to achieve homogenous, humanlike sialylation in model hosts. We also discuss the molecular engineering of sialyltransferases and their application in chemoenzymatic sialylation and sialic acid visualization on cell surfaces. The integration of these complementary engineering strategies will be useful for glycoscience to explore the biological significance of sialic acids on cell surfaces as well as the future development of advanced biopharmaceuticals.
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5
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Rao M, Peachman KK, Alving CR. Liposome Formulations as Adjuvants for Vaccines. Curr Top Microbiol Immunol 2021; 433:1-28. [PMID: 33165871 DOI: 10.1007/82_2020_227] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Development of liposome-based formulations as vaccine adjuvants has been intimately associated with, and dependent on, and informed by, a fundamental understanding of biochemical and biophysical properties of liposomes themselves. The Walter Reed Army Institute of Research (WRAIR) has a fifty-year history of experience of basic research on liposomes; and development of liposomes as drug carriers; and development of liposomes as adjuvant formulations for vaccines. Uptake of liposomes by phagocytic cells in vitro has served as an excellent model for studying the intracellular trafficking patterns of liposomal antigen. Differential fluorescent labeling of proteins and liposomal lipids, together with the use of inhibitors, has enabled the visualization of physical locations of antigens, peptides, and lipids to elucidate mechanisms underlying the MHC class I and class II pathways in phagocytic APCs. Army Liposome Formulation (ALF) family of vaccine adjuvants, which have been developed and improved since 1986, and which range from nanosize to microsize, are currently being employed in phase 1 studies with different types of candidate vaccines.
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Affiliation(s)
- Mangala Rao
- Chief, Laboratory of Adjuvant & Antigen Research, U.S. Military HIV Research Program, Walter Reed Army Institute of Research, 503 Robert Grant Avenue, Silver Spring, MD, 20910, USA.
| | - Kristina K Peachman
- Laboratory of Adjuvant & Antigen Research, U.S. Military HIV Research Program, Walter Reed Army Institute of Research, 503 Robert Grant Avenue, Silver Spring, MD, 20910, USA
| | - Carl R Alving
- Laboratory of Adjuvant & Antigen Research, U.S. Military HIV Research Program, Walter Reed Army Institute of Research, 503 Robert Grant Avenue, Silver Spring, MD, 20910, USA
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6
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Adak AK, Huang KT, Li PJ, Fan CY, Lin PC, Hwang KC, Lin CC. Regioselective S N2-Type Reaction for the Oriented and Irreversible Immobilization of Antibodies to a Glass Surface Assisted by Boronate Formation. ACS APPLIED BIO MATERIALS 2020; 3:6756-6767. [PMID: 35019340 DOI: 10.1021/acsabm.0c00700] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Antibodies have exquisite specificities for molecular recognition, which have led to their incorporation into array sensors that are crucial for research, diagnostic, and therapeutic applications. Many of these platforms rely heavily on surface-bound reactive groups to covalently tether antibodies to solid substrates; however, this strategy is hindered by a lack of orientation control over antibody immobilization. Here, we report a mild electrophilic phenylsulfonate (tosylate) ester-containing boronic acid affinity ligand for attaching antibodies to glass slides. A high level of antibody coupling located near the Fc region of the boronated antibody complex could be achieved by the proximal nucleophilic amino acid driven substitution reaction at the phenylsulfonate center. This enabled the full-length antibodies to be permanently tethered onto surfaces in an oriented manner. The advantages of this strategy were demonstrated through the individual and multiplex detection of protein and serum biomarkers. This strategy not only confers stability to the immobilized antibodies but also presents a different direction for the irreversible attachment of antibodies to solid supports in an orientation-controlled way.
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Affiliation(s)
- Avijit K Adak
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Kuan-Ting Huang
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Pei-Jhen Li
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Chen-Yo Fan
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Po-Chiao Lin
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
| | - Kuo-Chu Hwang
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Chun-Cheng Lin
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan.,Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
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7
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Tiwari S, Sarolia J, Kansara V, Chudasama NA, Prasad K, Ray D, Aswal VK, Bahadur P. Synthesis, Colloidal Characterization and Targetability of Phenylboronic Acid Functionalized α-Tocopheryl Polyethylene Glycol Succinate in Cancer Cells. Polymers (Basel) 2020; 12:polym12102258. [PMID: 33019616 PMCID: PMC7600591 DOI: 10.3390/polym12102258] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 09/27/2020] [Indexed: 12/20/2022] Open
Abstract
This study reports targetable micelles developed after covalent functionalization of α-tocopheryl polyethylene glycol succinate (TPGS) with amino phenylboronic acid (APBA). Nuclear magnetic resonance (NMR) and infrared (IR) spectroscopic results showed successful attachment of APBA to the hydrophilic segment of TPGS. Dynamic light scattering and small-angle neutron scattering studies revealed that the conjugate self-assembled in water to produce spherical core-shell micelles (14–20 nm) which remained stable against temperature (ca. 25–45 °C) and pH changes. The micelles could solubilize a high payload of paclitaxel (PLX) without exhibiting changes in the average size. However, at the saturation solubility, drug molecules migrated from the core to the shell region and engaged with APBA groups via π–π stacking interaction. Confocal microscopy and cell sorting analyses verified the effective translocation ability of TPGS-APBA micelles in sialic acid (SA) expressing MDA-MB-453 cells. At equivalent PLX dose, TPGS-APBA micelles showed about a twofold improvement in apoptotic death among the cells exposed for 2 h. Our findings indicate that the attachment of APBA can be a potential strategy for improving the intra-cellular localization of carriers among cancer cells expressing SA residues.
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Affiliation(s)
- Sanjay Tiwari
- Maliba Pharmacy College, Gopal-Vidyanagar Campus, Uka Tarsadia University, Surat 394350, India; (S.T.); (J.S.); (V.K.)
| | - Jayant Sarolia
- Maliba Pharmacy College, Gopal-Vidyanagar Campus, Uka Tarsadia University, Surat 394350, India; (S.T.); (J.S.); (V.K.)
| | - Vrushti Kansara
- Maliba Pharmacy College, Gopal-Vidyanagar Campus, Uka Tarsadia University, Surat 394350, India; (S.T.); (J.S.); (V.K.)
| | - Nishith A. Chudasama
- Natural Products & Green Chemistry Division, Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India; (N.A.C.); (K.P.)
| | - Kamalesh Prasad
- Natural Products & Green Chemistry Division, Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India; (N.A.C.); (K.P.)
| | - Debes Ray
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India; (D.R.); (V.K.A.)
| | - Vinod K Aswal
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India; (D.R.); (V.K.A.)
| | - Pratap Bahadur
- Department of Chemistry, Veer Narmad South Gujarat University, Surat 395007, India
- Correspondence:
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8
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Banga J, Srinivasan D, Sun CC, Thompson CD, Milletti F, Huang KS, Hamilton S, Song S, Hoffman AF, Qin YG, Matta B, LaPan M, Guo Q, Lu G, Li D, Qian H, Bolin DR, Liang L, Wartchow C, Qiu J, Downing M, Narula S, Fotouhi N, DeMartino JA, Tan SL, Chen G, Barnes BJ. Inhibition of IRF5 cellular activity with cell-penetrating peptides that target homodimerization. SCIENCE ADVANCES 2020; 6:eaay1057. [PMID: 32440537 PMCID: PMC7228753 DOI: 10.1126/sciadv.aay1057] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 03/05/2020] [Indexed: 05/07/2023]
Abstract
The transcription factor interferon regulatory factor 5 (IRF5) plays essential roles in pathogen-induced immunity downstream of Toll-, nucleotide-binding oligomerization domain-, and retinoic acid-inducible gene I-like receptors and is an autoimmune susceptibility gene. Normally, inactive in the cytoplasm, upon stimulation, IRF5 undergoes posttranslational modification(s), homodimerization, and nuclear translocation, where dimers mediate proinflammatory gene transcription. Here, we report the rational design of cell-penetrating peptides (CPPs) that disrupt IRF5 homodimerization. Biochemical and imaging analysis shows that IRF5-CPPs are cell permeable, noncytotoxic, and directly bind to endogenous IRF5. IRF5-CPPs were selective and afforded cell type- and species-specific inhibition. In plasmacytoid dendritic cells, inhibition of IRF5-mediated interferon-α production corresponded to a dose-dependent reduction in nuclear phosphorylated IRF5 [p(Ser462)IRF5], with no effect on pIRF5 levels. These data support that IRF5-CPPs function downstream of phosphorylation. Together, data support the utility of IRF5-CPPs as novel tools to probe IRF5 activation and function in disease.
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Affiliation(s)
- Jaspreet Banga
- The Feinstein Institute for Medical Research, Center for Autoimmune, Musculoskeletal and Hematopoietic Diseases, 350 Community Dr., Manhasset, NY 11030, USA
| | | | - Chia-Chi Sun
- EMD Serono Research and Development Institute Inc., 45A Middlesex Turnpike, Billerica, MA 01821, USA
| | - Cherrie D. Thompson
- The Feinstein Institute for Medical Research, Center for Autoimmune, Musculoskeletal and Hematopoietic Diseases, 350 Community Dr., Manhasset, NY 11030, USA
| | - Francesca Milletti
- Roche Innovation Center New York, 430 East 29th Street, New York, NY 10016, USA
| | - Kuo-Sen Huang
- Hoffmann-La Roche Inc., 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Shannon Hamilton
- Hoffmann-La Roche Inc., 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Su Song
- The Feinstein Institute for Medical Research, Center for Autoimmune, Musculoskeletal and Hematopoietic Diseases, 350 Community Dr., Manhasset, NY 11030, USA
| | - Ann F. Hoffman
- Hoffmann-La Roche Inc., 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Yajuan Gu Qin
- Hoffmann-La Roche Inc., 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Bharati Matta
- The Feinstein Institute for Medical Research, Center for Autoimmune, Musculoskeletal and Hematopoietic Diseases, 350 Community Dr., Manhasset, NY 11030, USA
| | - Margaret LaPan
- The Feinstein Institute for Medical Research, Center for Autoimmune, Musculoskeletal and Hematopoietic Diseases, 350 Community Dr., Manhasset, NY 11030, USA
| | - Qin Guo
- The Feinstein Institute for Medical Research, Center for Autoimmune, Musculoskeletal and Hematopoietic Diseases, 350 Community Dr., Manhasset, NY 11030, USA
| | - Gang Lu
- Hoffmann-La Roche Inc., 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Dan Li
- The Feinstein Institute for Medical Research, Center for Autoimmune, Musculoskeletal and Hematopoietic Diseases, 350 Community Dr., Manhasset, NY 11030, USA
| | - Hong Qian
- Hoffmann-La Roche Inc., 340 Kingsland Street, Nutley, NJ 07110, USA
| | - David R. Bolin
- Hoffmann-La Roche Inc., 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Lena Liang
- Hoffmann-La Roche Inc., 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Charles Wartchow
- Hoffmann-La Roche Inc., 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Jin Qiu
- EMD Serono Research and Development Institute Inc., 45A Middlesex Turnpike, Billerica, MA 01821, USA
| | - Michelle Downing
- EMD Serono Research and Development Institute Inc., 45A Middlesex Turnpike, Billerica, MA 01821, USA
| | - Satwant Narula
- Hoffmann-La Roche Inc., 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Nader Fotouhi
- Hoffmann-La Roche Inc., 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Julie A. DeMartino
- Hoffmann-La Roche Inc., 340 Kingsland Street, Nutley, NJ 07110, USA
- EMD Serono Research and Development Institute Inc., 45A Middlesex Turnpike, Billerica, MA 01821, USA
| | - Seng-Lai Tan
- Hoffmann-La Roche Inc., 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Gang Chen
- Hoffmann-La Roche Inc., 340 Kingsland Street, Nutley, NJ 07110, USA
- EMD Serono Research and Development Institute Inc., 45A Middlesex Turnpike, Billerica, MA 01821, USA
- Corresponding author. (B.J.B.); (G.C.)
| | - Betsy J. Barnes
- The Feinstein Institute for Medical Research, Center for Autoimmune, Musculoskeletal and Hematopoietic Diseases, 350 Community Dr., Manhasset, NY 11030, USA
- Departments of Molecular Medicine and Pediatrics, Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY 11549, USA
- Corresponding author. (B.J.B.); (G.C.)
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9
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Song HW, Yoo G, Bong JH, Kang MJ, Lee SS, Pyun JC. Surface display of sialyltransferase on the outer membrane of Escherichia coli and ClearColi. Enzyme Microb Technol 2019; 128:1-8. [PMID: 31186105 DOI: 10.1016/j.enzmictec.2019.04.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 04/28/2019] [Accepted: 04/30/2019] [Indexed: 01/03/2023]
Abstract
α2,3-Sialyltransferase from Pasteurella multocida (PmST1) is an enzyme that transfers a sialyl group of donor substrates to an acceptor substrate called N-acetyl-d-lactosamine (LacNAc). In this study PmST1 was expressed on the outer membrane of wildtype Escherichia coli (BL21) with lipopolysaccharide (LPS) and ClearColi with no LPS, and then the enzyme activity and expression level of PmST1 were compared. As the first step, the expression levels of PmST1 on the outer membranes of wildtype E. coli (BL21) and ClearColi were compared according to the IPTG induction time, and the absolute amount of surface-displayed PmST1 was calculated using densitometry of SDS-PAGE. As the next step, the influence of LPS on the PmST1 activity was estimated by analyzing Michaelis-Menten plot. The enzyme activity of PmST1 was analyzed by measuring the concentration of CMP, which was a by-product after the transfer of the sialyl group of donor compounds to the acceptor compounds. From a Michaelis-Menten plot, the enzyme activity of the surface-displayed PmST1 and the maximum rate (Vmax) of ClearColi were higher than those of wildtype E. coli (BL21). However, the KM value, which represented the concentration of substrate to reach half the maximum rate (Vmax), was similar for both enzymes. These results represented such a difference in enzyme activity was occurred from the interference of LPS on the mass transport of the donor and acceptor to PmST1 for the sialyl group transfer.
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Affiliation(s)
- Hyun-Woo Song
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seo-dae-mun-gu, Seoul, 03722, Republic of Korea
| | - Gu Yoo
- School of Chemistry & Institute for Life Sciences, FNES, University of Southampton, Highfield, Southampton, SO17 1BJ, UK
| | - Ji-Hong Bong
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seo-dae-mun-gu, Seoul, 03722, Republic of Korea
| | - Min-Jung Kang
- Korea Institute of Science and Technology (KIST), Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Seung Seo Lee
- School of Chemistry & Institute for Life Sciences, FNES, University of Southampton, Highfield, Southampton, SO17 1BJ, UK.
| | - Jae-Chul Pyun
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seo-dae-mun-gu, Seoul, 03722, Republic of Korea.
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10
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Jiang L, Lu R, Ye L. Towards Detection of Glycoproteins Using Molecularly Imprinted Nanoparticles and Boronic Acid-Modified Fluorescent Probe. Polymers (Basel) 2019; 11:E173. [PMID: 30960157 PMCID: PMC6401722 DOI: 10.3390/polym11010173] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 01/07/2019] [Accepted: 01/11/2019] [Indexed: 12/26/2022] Open
Abstract
Glycoproteins represent a group of important biomarkers for cancer and other life-threatening diseases. Selective detection of specific glycoproteins is an important step for early diagnosis. Traditional glycoprotein assays are mostly based on lectins, antibodies, and enzymes, biochemical reagents that are costly and require special cold chain storage and distribution. To address the shortcomings of the existing glycoprotein assays, we propose a new approach using protein-imprinted nanoparticles to replace the traditional lectins and antibodies. Protein-imprinted binding sites were created on the surface of silica nanoparticles by copolymerization of dopamine and aminophenylboronic acid. The imprinted nanoparticles were systematically characterized by dynamic light scattering, scanning and transmission electron microscopy, thermogravimetric analysis, Fourier transform infrared spectroscopy, and elemental analysis. A boronic acid-modified fluorescent probe was used to detect the target glycoprotein captured by the imprinted nanoparticles. Using horseradish peroxidase as a model glycoprotein, we demonstrated that the proposed method can be applied to detect target protein containing multiple glycosylation sites. Because of their outstanding stability and low cost, imprinted nanoparticles and synthetic probes are attractive replacements of traditional biochemical reagents to develop simpler, faster, and more cost-effective analytical methods for glycoproteins.
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Affiliation(s)
- Lingdong Jiang
- Division of Pure and Applied Biochemistry, Department of Chemistry, Lund University, Lund 22100 Sweden.
| | - Rui Lu
- Division of Pure and Applied Biochemistry, Department of Chemistry, Lund University, Lund 22100 Sweden.
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Lei Ye
- Division of Pure and Applied Biochemistry, Department of Chemistry, Lund University, Lund 22100 Sweden.
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11
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Abstract
Glycan decorates all mammalian cell surfaces through glycosylation, which is one of the most important post-modifications of proteins. Glycans mediate a wide variety of biological processes, including cell growth and differentiation, cell-cell communication, immune response, pathogen interaction, and intracellular signaling events. Besides, tumor cells aberrantly express distinct sets of glycans, which can indicate different tumor onsets and progression processes. Thus, analysis of cellular glycans may contribute to understanding of glycan-related biological processes and correlation of glycan patterns with disease states for clinical diagnosis and treatment. Although proteomics and glycomics have included great efforts for in vitro study of glycan structures and functions using lysis samples of cells or tissues, they cannot offer real-time qualitative or quantitative information, especially spatial distribution, of glycans on/in intact cells, which is important to the revelation of glycan-related biological events. Moreover, the complex lysis and separation procedures may bring unpredictable loss of glycan information. Focusing on the great urgency for in situ analysis of cellular glycans, our group developed a series of methods for in situ analysis of cellular glycans in the past 10 years. By construction of electrochemical glycan-recognizable probes, glycans on the cell surface can be quantified by direct or competitive electrochemical detection. Using multichannel electrodes or encoded lectin probes, multiple glycans on the cell surface can be dynamically monitored simultaneously. Through design of functional nanoprobes, the cell surface protein-specific glycans and intracellular glycan-related enzymes can be visualized by fluorescence or Raman imaging. Besides, some biological enzymes-based methods have been developed for remodeling or imaging of protein-specific glycans and other types of glycoconjugates, such as gangliosides. Through tracing the changes of glycan expression induced by drugs or gene interference, some glycan-related biological processes have been deduced or proved, demonstrating the reliability and practicability of the developed methods. This Account surveys the key technologies developed in this area, along with the discussion on the shortages of current methodology as well as the possible strategies to overcome those shortages. The future trend in this topic is also discussed. It is expected that this Account can provide a versatile arsenal for chemical and biological researchers to unravel the complex mechanisms involved in glycan-related biological processes and light new beacons in tumor diagnosis and treatment.
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Affiliation(s)
- Yunlong Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Lin Ding
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Huangxian Ju
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
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Szabo R, Skropeta D. Advancement of Sialyltransferase Inhibitors: Therapeutic Challenges and Opportunities. Med Res Rev 2016; 37:219-270. [DOI: 10.1002/med.21407] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 07/14/2016] [Accepted: 08/03/2016] [Indexed: 01/06/2023]
Affiliation(s)
- Rémi Szabo
- School of Chemistry; University of Wollongong; Wollongong NSW 2522 Australia
| | - Danielle Skropeta
- School of Chemistry; University of Wollongong; Wollongong NSW 2522 Australia
- Centre for Medical & Molecular Bioscience; University of Wollongong; Wollongong NSW 2522 Australia
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