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Buensuceso CE, Tiu BDB, Lee LP, Sabido PMG, Nuesca GM, Caldona EB, Del Mundo FR, Advincula RC. Publisher Correction to: Electropolymerized‑molecularly imprinted polymers (E‑MIPS) as sensing elements for the detection of dengue infection. Anal Bioanal Chem 2021; 414:1457-1458. [PMID: 34881395 DOI: 10.1007/s00216-021-03818-2] [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] [Received: 11/30/2021] [Accepted: 11/30/2021] [Indexed: 10/19/2022]
Affiliation(s)
- Clarisse E Buensuceso
- Institute of Chemistry, College of Science, University of the Philippines Diliman, 1101, Quezon City, Philippines.,Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Brylee David B Tiu
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA.,Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA.,Department of Bioengineering, University of California, Berkeley, CA, 94720-1762, USA
| | - Luke P Lee
- Department of Bioengineering, University of California, Berkeley, CA, 94720-1762, USA
| | - Portia Mahal G Sabido
- Institute of Chemistry, College of Science, University of the Philippines Diliman, 1101, Quezon City, Philippines
| | - Guillermo M Nuesca
- Institute of Chemistry, College of Science, University of the Philippines Diliman, 1101, Quezon City, Philippines
| | - Eugene B Caldona
- Department of Chemical and Biomolecular Engineering and Joint Institute for Advanced Materials, University of Tennessee, Knoxville, TN, 37996, USA
| | - Florian R Del Mundo
- Institute of Chemistry, College of Science, University of the Philippines Diliman, 1101, Quezon City, Philippines
| | - Rigoberto C Advincula
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA. .,Department of Chemical and Biomolecular Engineering and Joint Institute for Advanced Materials, University of Tennessee, Knoxville, TN, 37996, USA. .,Center for Nanophase Materials and Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA.
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Buensuceso CE, Tiu BDB, Lee LP, Sabido PMG, Nuesca GM, Caldona EB, Del Mundo FR, Advincula RC. Electropolymerized-molecularly imprinted polymers (E-MIPS) as sensing elements for the detection of dengue infection. Anal Bioanal Chem 2021; 414:1347-1357. [PMID: 34750643 DOI: 10.1007/s00216-021-03757-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 09/15/2021] [Revised: 10/12/2021] [Accepted: 10/26/2021] [Indexed: 11/25/2022]
Abstract
A straightforward in situ detection method for dengue infection was demonstrated through the molecular imprinting of a dengue nonstructural protein 1 (NS1) epitope into an electropolymerized molecularly imprinted polyterthiophene (E-MIP) film sensor. The key enabling step in the sensor fabrication is based on an epitope imprinting strategy, in which short peptide sequences derived from the original target molecules were employed as the main template for detection and analysis. The formation of the E-MIP sensor films was facilitated using cyclic voltammetry (CV) and monitored in situ by electrochemical quartz crystal microbalance (EC-QCM). Surface properties were analyzed using different techniques including atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and polarization modulation-infrared reflection-adsorption (PM-IRRAS). The standard calibration curve (R = 0.9830) was generated for the detection of the epitope, Ac-VHTWTEQYKFQ-NH2, with a linear range of 0.2 to 30 μg/mL and detection limit of 0.073 μg/mL. A separate calibration curve (R = 0.9786) was obtained using spiked buffered solutions of dengue NS1 protein, which resulted in a linear range of 0.2 to 10 μg/mL and a detection limit of 0.056 μg/mL. The fabricated E-MIP sensor exhibited long-term stability, high sensitivity, and good selectivity towards the targeted molecules. These results indicated that the formation of the exact and stable cavity imprints in terms of size, shape, and functionalities was successful. In our future work, we aim to use our E-MIP sensors for NS1 detection in real-life samples such as serum and blood.
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Affiliation(s)
- Clarisse E Buensuceso
- Institute of Chemistry, College of Science, University of the Philippines Diliman, 1101, Quezon City, Philippines
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Brylee David B Tiu
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
- Department of Bioengineering, University of California, Berkeley, CA, 94720-1762, USA
| | - Luke P Lee
- Department of Bioengineering, University of California, Berkeley, CA, 94720-1762, USA
| | - Portia Mahal G Sabido
- Institute of Chemistry, College of Science, University of the Philippines Diliman, 1101, Quezon City, Philippines
| | - Guillermo M Nuesca
- Institute of Chemistry, College of Science, University of the Philippines Diliman, 1101, Quezon City, Philippines
| | - Eugene B Caldona
- Department of Chemical and Biomolecular Engineering and Joint Institute for Advanced Materials, University of Tennessee, Knoxville, TN, 37996, USA
| | - Florian R Del Mundo
- Institute of Chemistry, College of Science, University of the Philippines Diliman, 1101, Quezon City, Philippines
| | - Rigoberto C Advincula
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA.
- Department of Chemical and Biomolecular Engineering and Joint Institute for Advanced Materials, University of Tennessee, Knoxville, TN, 37996, USA.
- Center for Nanophase Materials and Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA.
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Boda RLB, Caluag CAM, Dante RAS, Petate AGJ, Candaza HPT, Rivera WL, Jacinto SD, Sabido PMG. Evaluation of
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‐2,4‐diaminobutyric acid‐based ultrashort cationic lipopeptides as potential antimicrobial and anticancer agents. J CHIN CHEM SOC-TAIP 2021. [DOI: 10.1002/jccs.202100273] [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: 11/07/2022]
Affiliation(s)
- Ramoncito Luis B. Boda
- Institute of Chemistry, College of Science, University of the Philippines Diliman Quezon City Philippines
- Natural Sciences Research Institute, College of Science, University of the Philippines Diliman Quezon City Philippines
| | - Carl Angelo M. Caluag
- Institute of Chemistry, College of Science, University of the Philippines Diliman Quezon City Philippines
| | - Rachelle Anne S. Dante
- Institute of Biology, College of Science, University of the Philippines Diliman Quezon City Philippines
| | - Art Gersun J. Petate
- Institute of Chemistry, College of Science, University of the Philippines Diliman Quezon City Philippines
| | - Hermie Patrice T. Candaza
- Institute of Chemistry, College of Science, University of the Philippines Diliman Quezon City Philippines
| | - Windell L. Rivera
- Institute of Biology, College of Science, University of the Philippines Diliman Quezon City Philippines
| | - Sonia D. Jacinto
- Institute of Biology, College of Science, University of the Philippines Diliman Quezon City Philippines
| | - Portia Mahal G. Sabido
- Institute of Chemistry, College of Science, University of the Philippines Diliman Quezon City Philippines
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Salas RL, Garcia JKDL, Miranda ACR, Rivera WL, Nellas RB, Sabido PMG. Effects of truncation of the peptide chain on the secondary structure and bioactivities of palmitoylated anoplin. Peptides 2018; 104:7-14. [PMID: 29614317 DOI: 10.1016/j.peptides.2018.03.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 03/28/2018] [Accepted: 03/30/2018] [Indexed: 12/29/2022]
Abstract
Anoplin (GLLKRIKTLL-NH2) is of current interest due to its short sequence and specificity towards bacteria. Recent studies on anoplin have shown that truncation and acylation compromises its antimicrobial activity and specificity, respectively. In this study, truncated analogues (pal-ano-9 to pal-ano-5) of palmitoylated anoplin (pal-anoplin) were synthesized to determine the effects of C-truncation on its bioactivities. Moreover, secondary structure of each analogue using circular dichroism (CD) spectroscopy was determined to correlate with bioactivities. Interestingly, pal-anoplin, pal-ano-9 and pal-ano-6 were helical in water, unlike anoplin. In contrast, pal-ano-8, pal-ano-7 and pal-ano-5, with polar amino acid residues at the C-terminus, were random coil in water. Nevertheless, all the peptides folded into helical structures in 30% trifluoroethanol/water (TFE/H2O) except for the shortest analogue pal-ano-5. Hydrophobicity played a significant role in the enhancement of activity against bacteria E. coli and S. aureus as all lipopeptides including the random coil pal-ano-5 were more active than the parent anoplin. Meanwhile, the greatest improvement in activity against the fungus C. albicans was observed for pal-anoplin analogues (pal-ano-9 and pal-ano-6) that were helical in water. Although, hydrophobicity is a major factor in the secondary structure and antimicrobial activity, it appears that the nature of amino acids at the C-terminus also influence folding of lipopeptides in water and its antifungal activity. Moreover, the hemolytic activity of the analogues was found to correlate with hydrophobicity, except for the least hemolytic, pal-ano-5. Since most of the analogues are more potent and shorter than anoplin, they are promising drug candidates for further development.
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Affiliation(s)
- Remmer L Salas
- Institute of Chemistry, College of Science, University of the Philippines, Diliman, Quezon City, 1101, Philippines
| | - Jan Kathryne D L Garcia
- Institute of Chemistry, College of Science, University of the Philippines, Diliman, Quezon City, 1101, Philippines; Natural Sciences Research Institute, University of the Philippines, Diliman, Quezon City, 1101, Philippines
| | - Ana Carmela R Miranda
- Institute of Chemistry, College of Science, University of the Philippines, Diliman, Quezon City, 1101, Philippines
| | - Windell L Rivera
- Natural Sciences Research Institute, University of the Philippines, Diliman, Quezon City, 1101, Philippines; Institute of Biology, College of Science, University of the Philippines, Diliman, Quezon City, 1101, Philippines
| | - Ricky B Nellas
- Institute of Chemistry, College of Science, University of the Philippines, Diliman, Quezon City, 1101, Philippines; Natural Sciences Research Institute, University of the Philippines, Diliman, Quezon City, 1101, Philippines
| | - Portia Mahal G Sabido
- Institute of Chemistry, College of Science, University of the Philippines, Diliman, Quezon City, 1101, Philippines; Natural Sciences Research Institute, University of the Philippines, Diliman, Quezon City, 1101, Philippines.
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