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Aarthy M, Hemalatha T, Suryalakshmi P, Vinoth V, Mercyjayapriya J, Shanmugam G, Ayyadurai N. Biomimetic design of fibril-forming non-immunogenic collagen like proteins for tissue engineering. Int J Biol Macromol 2024; 266:130999. [PMID: 38521303 DOI: 10.1016/j.ijbiomac.2024.130999] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 11/24/2023] [Revised: 02/29/2024] [Accepted: 03/17/2024] [Indexed: 03/25/2024]
Abstract
Collagen, a key component of extracellular matrix serves as a linchpin for maintaining structural integrity and functional resilience. Concerns over purity and immunogenicity of animal-derived collagens have spurred efforts to develop synthetic collagen-based biomaterials. Despite several collagen mimics, there remains limited exploration of non-immunogenic biomaterials with the capacity for effective self-assembly. To combat the lacuna, collagen like protein (CLP) variants were rationally designed and recombinantly expressed, incorporating human telopeptide sequences (CLP-N and CLP-NC) and bioactive binding sites (CLP-NB). Circular dichroism analyses of the variants confirmed the triple helical conformation, with variations in thermal stability and conformation attributed to the presence of telopeptides at one or both ends of CLP. The variants had propensity to form oligomers, setting the stage for fibrillogenesis. The CLP variants were biocompatible, hemocompatible and supported cell proliferation and migration, particularly CLP-NB with integrin-binding sites. Gene expression indicated a lack of significant upregulation of inflammatory markers, highlighting the non-immunogenic nature of these variants. Lyophilized CLP scaffolds maintained their triple-helical structure and offered favorable biomaterial characteristics. These results accentuate the potential of designed CLP variants in tissue engineering, regenerative medicine and industrial sectors, supporting the development of biocompatible scaffolds and implants for therapeutic and cosmetic purposes.
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Affiliation(s)
- Mayilvahanan Aarthy
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai 600020, India
| | - Thiagarajan Hemalatha
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai 600020, India
| | - Pandurangan Suryalakshmi
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai 600020, India
| | - Vetrivel Vinoth
- Department of Organic and Bioorganic Chemistry, CSIR-CLRI, Chennai 600020, India
| | - Jebakumar Mercyjayapriya
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai 600020, India
| | - Ganesh Shanmugam
- Department of Organic and Bioorganic Chemistry, CSIR-CLRI, Chennai 600020, India
| | - Niraikulam Ayyadurai
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai 600020, India.
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George A, Indhu M, Ashokraj S, Shanmugam G, Ganesan P, Kamini NR, Ayyadurai N. Corrigendum to "Genetically encoded dihydroxyphenylalanine coupled with tyrosinase for strain promoted labelling" [Bioorg. Med. Chem. 50 (2021) 116460]. Bioorg Med Chem 2024; 103:117664. [PMID: 38508900 DOI: 10.1016/j.bmc.2024.117664] [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: 03/22/2024]
Affiliation(s)
- Augustine George
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India
| | - Mohan Indhu
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Sundarapandian Ashokraj
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Ganesh Shanmugam
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India; Division of Organic and Bio-Organic Chemistry, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India
| | - Ponesakki Ganesan
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India
| | - Numbi Ramudu Kamini
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India
| | - Niraikulam Ayyadurai
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India.
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Srinivasan P, Rajagopal V, Shanmugam G, Madhan B. Development of masked silica tanning system for sustainable leather production. Environ Sci Pollut Res Int 2024; 31:26567-26579. [PMID: 38446300 DOI: 10.1007/s11356-024-32567-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 02/16/2024] [Indexed: 03/07/2024]
Abstract
Amid mounting pressure on the long-term recyclability of chromium in tanned leather and the associated environmental hazards, the quest for an alternative, cleaner tanning system has gained tremendous momentum. In this context, our study explores the remarkable potential of silicates as a versatile platform for skin/hide tanning, circumventing the inherent risks and ecological threats posed by chromium exposure and leaching. We present an alternative approach of using a silica-based tanning system, employing a Taguchi model, to optimize a masked silica (MaSil) tanning product/process for achieving effective collagen stabilization. Our results demonstrate the significant advancements made in hydrothermal denaturation temperature, reaching an impressive 79 °C through precise Taguchi parameters-5% SiO2, masked with 0.3 mole of citrate salt, and a tanning process fixation pH of 4.5. Notably, the mechanical strength analysis reveals compliance with the stringent upper leather recommendation standards, validating the practicality and quality of MaSil crust leather. Moreover, our research highlights the unprecedented environmental benefits of the first reported application of Taguchi's approach to the MaSil tanning system. The developed tanning system remarkably reduces total dissolved solids (TDS), biological oxygen demand (BOD), chemical oxygen demand (COD), and overall water load by 68.4%, 25.4%, 59.5%, and 33.7%, respectively, heralding a promising era of water and environmental sustainability in the leather sector. This study holds the potential to transform leather production, wherein the envisioned future on the use of the Taguchi model and optimized MaSil tanning system could find a place in shaping a cleaner, greener, and more sustainable leather industry.
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Affiliation(s)
- Pradeep Srinivasan
- Biochemistry & Biotechnology Laboratory, CSIR-Central Leather Research Institute (CSIR-CLRI), Sardar Patel Road, Adyar, Chennai, 600020, India
- Department of Leather Technology, Alagappa College of Technology (Housed at CSIR-Central Leather Research Institute), Anna University, Chennai, 600020, India
| | - Vedayokesh Rajagopal
- Department of Leather Technology, Alagappa College of Technology (Housed at CSIR-Central Leather Research Institute), Anna University, Chennai, 600020, India
| | - Ganesh Shanmugam
- Department of Leather Technology, Alagappa College of Technology (Housed at CSIR-Central Leather Research Institute), Anna University, Chennai, 600020, India
- Organic & Bioorganic Chemistry Laboratory, CSIR-Central Leather Research Institute (CSIR-CLRI), Sardar Patel Road, Adyar, Chennai, 600020, India
| | - Balaraman Madhan
- Biochemistry & Biotechnology Laboratory, CSIR-Central Leather Research Institute (CSIR-CLRI), Sardar Patel Road, Adyar, Chennai, 600020, India.
- Department of Leather Technology, Alagappa College of Technology (Housed at CSIR-Central Leather Research Institute), Anna University, Chennai, 600020, India.
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Duraisamy DK, Reddy SMM, Saveri P, Deshpande AP, Shanmugam G. A Unique Temperature-induced Reverse Supramolecular Chirality-Assisted Gel-to-Gel Transition. Macromol Rapid Commun 2024:e2400018. [PMID: 38437791 DOI: 10.1002/marc.202400018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 01/10/2024] [Revised: 02/19/2024] [Indexed: 03/06/2024]
Abstract
Supramolecular hydrogels typically undergo a gel-to-sol transition with heat, as intermolecular interactions within the gel weaken. Although gel-to-gel transitions during heating are rare, they may occur due to minor rearrangements caused by thermal forces in the supramolecular self-assembled structure. Here, we present an unprecedented temperature-induced gel-to-gel transition assisted by supramolecular chiral inversion in a hydrogel system. The transition results from a left-handed M-type helix to a right-handed P-type helix, attributed to the π-system-conjugated amino acid, L-Tyrosine (Fm-L-Tyr). Upon solvent dilution, Fm-L-Tyr induce translucent hydrogel formed by entangled fibers with a kinetically stable left-handed M-type supramolecular helix. At 70 °C, hydrogel transforms into an opaque gel with a reverse supramolecular chirality yielding a thermodynamically stable right-handed P-type helix. Supramolecular chiral inversion is substantiated by two chiroptical methods. This unique gel-to-gel transition, accompanied by chiral inversion, is anticipated to attract attention, especially for applications sensitive to chirality. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Dinesh Kumar Duraisamy
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Adyar, Chennai, 600020, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Samala Murali Mohan Reddy
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Adyar, Chennai, 600020, India
| | - Puchalapalli Saveri
- Department of Chemical Engineering, Indian Institute of Technology Madras, Adyar, Chennai, 600036, India
| | - Abhijit P Deshpande
- Department of Chemical Engineering, Indian Institute of Technology Madras, Adyar, Chennai, 600036, India
| | - Ganesh Shanmugam
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Adyar, Chennai, 600020, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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Mukherjee S, Reddy SMM, Shanmugam G. A bio-inspired silkworm 3D cocoon-like hierarchical self-assembled structure from π-conjugated natural aromatic amino acids. Soft Matter 2024; 20:1834-1845. [PMID: 38314911 DOI: 10.1039/d3sm01746j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
The formation of spontaneous 3D self-assembled hierarchical structures from 1D nanofibers is a significant breakthrough in materials science. Overcoming the major challenges associated with developing these 3D structures, such as uncontrolled self-assembly, complex procedures, and machinery, has been a formidable task. However, the current discovery reveals that simple π-system (fluorenyl)-functionalized natural aromatic amino acids, phenylalanine (Fmoc-F) and tyrosine (Fmoc-Y), can form bio-inspired 3D cocoon-like structures. These structures are composed of entangled 1D nanofibers created through supramolecular self-assembly using a straightforward one-step process of solvent casting. The self-assembly process relies on π-π stacking of the fluorenyl (π-system) moieties and intermolecular hydrogen bonding between urethane amide groups. The cocoon-like structures are versatile and independent of concentration, temperature, and humidity, making them suitable for various applications. This discovery has profound implications for materials science and the developed advanced biomaterials, such as Fmoc-F and Fmoc-Y, can serve as flexible foundational components for constructing 3D fiber-based structures.
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Affiliation(s)
- Smriti Mukherjee
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR), Central Leather Research Institute (CLRI) (CSIR-CLRI), Adyar, Chennai, 600020, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Samala Murali Mohan Reddy
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR), Central Leather Research Institute (CLRI) (CSIR-CLRI), Adyar, Chennai, 600020, India.
| | - Ganesh Shanmugam
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR), Central Leather Research Institute (CLRI) (CSIR-CLRI), Adyar, Chennai, 600020, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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Mukherjee S, Sundarapandian A, Ayyadurai N, Shanmugam G. Collagen Mimicry with a Short Collagen Model Peptide. Macromol Rapid Commun 2024; 45:e2300573. [PMID: 37924252 DOI: 10.1002/marc.202300573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 09/22/2023] [Revised: 11/01/2023] [Indexed: 11/06/2023]
Abstract
Mimicking triple helix and fibrillar network of collagen through collagen model peptide(CMP) with short GPO tripeptide repeats is a great challenge. Herein, a minimalistic CMP comprising only five GPO repeats [(GPO)5 ] is presented. This novel approach involves the fusion of ultrashort peptide with the synergetic power of π-system and β-sheet formation to short CMP (GPO)5 . Accordingly, a hydrogel-forming, fluorenylmethoxycarbonyl (Fmoc)-functionalized ultrashort peptide (NFGAIL) is fused at the N-terminus and phenylalanine at the C-terminus of (GPO)5 (Fmoc-NFGAIL-(GPO)5 -F-COOH, FmP-5GPO). At room temperature, it forms a robust triple helix in aqueous buffer solution and has a relatively high melting point of 35 °C. The fluorenyl motif stabilizes the triple helix by aromatic π-π interactions as in its absence, triple helix is not formed. NFGAIL, which forms a β-sheet, also aids in triple helix stabilization via intermolecular hydrogen bonding and hydrophobic interactions. FmP-5GPO forms highly entangled nanofibrils with a micrometer length, which have excellent cell viability. The achievement of stable triple helix and fibrils in such a short CMP(FmP-5GPO) sequence is a challenging feat, and its significance in CMP-based biomaterials is undeniable. The present strategy highlights the potential for developing new CMP sequences through intelligent tuning of fusion peptides and GPO repeats.
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Affiliation(s)
- Smriti Mukherjee
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Adyar, Chennai, Tamil Nadu, 600020, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India
| | - Ashokraj Sundarapandian
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India
- Biochemistry & Biotechnology Laboratory, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Adyar, Chennai, Tamil Nadu, 600020, India
| | - Niraikulam Ayyadurai
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India
- Biochemistry & Biotechnology Laboratory, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Adyar, Chennai, Tamil Nadu, 600020, India
| | - Ganesh Shanmugam
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Adyar, Chennai, Tamil Nadu, 600020, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India
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Minisha S, Gopinath A, Mukherjee S, Srinivasan P, Madhan B, Shanmugam G. Impact of SiO 2 nanoparticles on the structure and property of type I collagen in three different forms. Spectrochim Acta A Mol Biomol Spectrosc 2024; 305:123520. [PMID: 37857074 DOI: 10.1016/j.saa.2023.123520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 09/15/2023] [Accepted: 10/10/2023] [Indexed: 10/21/2023]
Abstract
Silica-based nanoparticles have found application in the development of biocomposites involving reconstituted collagen in tissue engineering and wound healing, and leather modification, specifically targeting collagen fibers. However, a comprehensive investigation into the interaction between collagen-silica nanoparticles and different forms of collagen using biophysical methods remains unexplored. In this study, we examined the interaction between silica (SiO2) nanoparticles and collagen in its fiber, microfibril, and monomer forms through high-resolution scanning electron microscopy, circular dichroism, Fourier-transform infrared spectroscopy, fluorescence analysis, zeta potential measurements, and turbidity assays. Our results reveal that SiO2 nanoparticles exhibited a non-specific attraction towards collagen fibers without disrupting their structural integrity. Interestingly, SiO2 nanoparticles influenced the process of microfibrillation, resulting in heterogeneous fibril diameters while maintaining the natural D-periodicity. This finding is significant, as fibril size variations can impact the properties of collagen composites. Notably, the triple helical structure of collagen in its monomer form remained unaffected in the presence of SiO2 nanoparticles, indicating that the nanoparticles did not disrupt the electrostatic interactions that stabilize the triple helix. Additionally, the increased stability of SiO2 nanoparticles in the presence of collagen confirmed their interaction. These findings provide a promising avenue for the development of SiO2-based nanoparticles to enhance the stability of collagen fibers and control fiber sizes for biomaterial preparation. Moreover, this study advances the potential application of SiO2-based nanoparticles in leather tanning, an emerging field where nanoparticles can play a crucial role.
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Affiliation(s)
- Sivalingam Minisha
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Adyar, Chennai 600020, India
| | - Arun Gopinath
- CARE Division, CSIR-CLRI, Adyar, Chennai 600020, India
| | - Smriti Mukherjee
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Adyar, Chennai 600020, India
| | | | | | - Ganesh Shanmugam
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Adyar, Chennai 600020, India.
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Fatehi Hassanabad A, Schoettler FI, Kent WD, Adams CA, Holloway DD, Ali IS, Novick RJ, Ahsan MR, McClure RS, Shanmugam G, Kidd WT, Kieser TM, Fedak PW, Deniset JF. Cardiac surgery elicits pericardial inflammatory responses that are distinct compared with postcardiopulmonary bypass systemic inflammation. JTCVS Open 2023; 16:389-400. [PMID: 38204649 PMCID: PMC10774980 DOI: 10.1016/j.xjon.2023.06.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 05/22/2023] [Accepted: 06/12/2023] [Indexed: 01/12/2024]
Abstract
Objectives Cardiac surgery using cardiopulmonary bypass contributes to a robust systemic inflammatory process. Local intrapericardial postsurgical inflammation is believed to trigger important clinical implications, such as postoperative atrial fibrillation and postsurgical intrathoracic adhesions. Immune mediators in the pericardial space may underlie such complications. Methods In this prospective pilot clinical study, 12 patients undergoing isolated coronary artery bypass graft surgery were enrolled. Native pericardial fluid and venous blood samples (baseline) were collected immediately after pericardiotomy. Postoperative pericardial fluid and venous blood samples were collected 48-hours after cardiopulmonary bypass and compared with baseline. Flow cytometry determined proportions of specific immune cells, whereas multiplex analysis probed for inflammatory mediators. Results Neutrophils are the predominant cells in both the pericardial space and peripheral blood postoperatively. There are significantly more CD163lo macrophages in blood compared with pericardial effluent after surgery. Although there are significantly more CD163hi macrophages in native pericardial fluid compared with baseline blood, after surgery there are significantly fewer of these cells present in the pericardial space compared with blood. Postoperatively, concentration of interleukin receptor antagonist 6, and interleukin 8 were significantly higher in the pericardial space compared with blood. After surgery, compared with blood, the pericardial space has a significantly higher concentration of matrix metalloproteinase 3, matrix metalloproteinase 8, and matrix metalloproteinase 9. The same trend was observed with transformational growth factor β. Conclusions Cardiac surgery elicits an inflammatory response in the pericardial space, which differs from systemic inflammatory responses. Future work should determine whether or not this distinct local inflammatory response contributes to postsurgical complications and could be modified to influence clinical outcomes.
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Affiliation(s)
- Ali Fatehi Hassanabad
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Friederike I. Schoettler
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Cardiac Surgery, Medical Faculty, University Hospital Düsseldorf, Heinrich-Heine-University, Düsseldorf, Germany
| | - William D.T. Kent
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Corey A. Adams
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Daniel D. Holloway
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Imtiaz S. Ali
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Richard J. Novick
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Critical Care Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Muhammad R. Ahsan
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Robert Scott McClure
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Ganesh Shanmugam
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - William T. Kidd
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Teresa M. Kieser
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Paul W.M. Fedak
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Justin F. Deniset
- Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
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Unnikrishnan AC, Balamurugan K, Shanmugam G. Structural Insights into the Amyloid Fibril Polymorphism Using an Isotope-Edited Vibrational Circular Dichroism Study at the Amino Acid Residue Level. J Phys Chem B 2023; 127:7674-7684. [PMID: 37667494 DOI: 10.1021/acs.jpcb.3c03437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
Polymorphism is common in both in vitro and in vivo amyloid fibrils formed by the same peptide/protein. However, the differences in their self-assembled structures at the amino acid level remain poorly understood. In this study, we utilized isotope-edited vibrational circular dichroism (VCD) on a well-known amyloidogenic peptide fragment (N22FGAIL27) of human islet amyloid polypeptide (IAPf) to investigate the structural polymorphism. Two individual isotope-labeled IAPf peptides were used, with a 13C label on the carbonyl group of phenylalanine (IAPf-F) and glycine (IAPf-G). We compared the amyloid-like nanofibril of IAPf induced by solvent casting (fibril B) with our previous report on the same IAPf peptide fibril but with a different fibril morphology (fibril A) formed in an aqueous buffer solution. Fibril B consisted of entangled, laterally fused amyloid-like nanofibrils with a relatively shorter diameter (15-50 nm) and longer length (several microns), while fibril A displayed nanofibrils with a higher diameter (30-60 nm) and shorter length (500 nm-2 μm). The isotope-edited VCD analysis indicated that fibrils B consisted of anti-parallel β-sheet arrangements with glycine residues in the registry and phenylalanine residues out of the registry, which was significantly different from fibrils A, where a mixture of parallel β-sheet and turn structure with the registry at phenylalanine and glycine residues was observed. The VCD analysis, therefore, suggests that polymorphism in amyloid-like fibrils can be attributed to the difference in the packing/arrangement of the individual β-strands in the β-sheet and the difference in the amino acid registry. Our findings provide insights into the structural aspects of fibril polymorphism related to various amyloid diseases and may aid in designing amyloid fibril inhibitors for therapeutic purposes.
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Affiliation(s)
- Anagha C Unnikrishnan
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR)─Central Leather Research Institute (CLRI), Adyar, Chennai 600020, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Kanagasabai Balamurugan
- Centre for High Computing, Council of Scientific and Industrial Research (CSIR)─Central Leather Research Institute (CLRI), Adyar, Chennai 600020, India
| | - Ganesh Shanmugam
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR)─Central Leather Research Institute (CLRI), Adyar, Chennai 600020, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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Augustine G, Sisila V, Indhu M, Gupta D, Tandel D, Harshan KH, Shanmugam G, Padmapriya P, Sivasubramanian S, Kaveri K, Ramudu KN, Ayyadurai N. Redirecting the JAK-STAT signal blocks the SARS-CoV-2 replication. J Med Virol 2023; 95:e28965. [PMID: 37488710 DOI: 10.1002/jmv.28965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 06/05/2023] [Accepted: 07/05/2023] [Indexed: 07/26/2023]
Abstract
The distinct disease progression patterns of severe acute respiratory syndrome coronavirus clade 2 (SARS-CoV-2) indicate diverse host immune responses. SARS-CoV-2 severely impairs type I interferon (IFN) cell signaling, resulting in uncontrolled late-phase lung damage in patients. For better pharmacological properties, cytokine modifications may sometimes result in a loss of biological activity against the virus. Here, we employed the genetic code expansion and engineered IFN-β, a phase II clinical cytokine with 3-amino tyrosine (IFN-β-A) that reactivates STAT2 expression in virus-infected human cells through JAK/STAT cell signaling without affecting signal activation and serum half-life. This study identified that genetically encoded IFN-β-A might stabilize the protein-receptor complex and trigger JAK-STAT cell signaling, which is a promising modality for controlling SARS-CoV-2 infection.
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Affiliation(s)
- George Augustine
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research-Central Leather Research Institute (CSIR-CLRI), Chennai, India
- Department of Biochemistry and Biophysics, Oregon State University, Corvallis, Oregon, USA
| | - Valappil Sisila
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research-Central Leather Research Institute (CSIR-CLRI), Chennai, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Mohan Indhu
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research-Central Leather Research Institute (CSIR-CLRI), Chennai, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Divya Gupta
- Council of Scientific and Industrial Research-Centre for Cellular and Molecular Biology (CSIR-CCMB), Hyderabad, India
| | - Dixit Tandel
- Council of Scientific and Industrial Research-Centre for Cellular and Molecular Biology (CSIR-CCMB), Hyderabad, India
| | - Krishnan Harinivas Harshan
- Council of Scientific and Industrial Research-Centre for Cellular and Molecular Biology (CSIR-CCMB), Hyderabad, India
| | - Ganesh Shanmugam
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
- Department of Bio-Organic Chemistry, Council of Scientific and Industrial Research-Central Leather Research Institute (CSIR-CLRI), Chennai, India
| | - Padmanabhan Padmapriya
- Department of Virology, King Institute of Preventive Medicine and Research, Chennai, India
| | | | - Krishnaswamy Kaveri
- Department of Virology, King Institute of Preventive Medicine and Research, Chennai, India
| | - Kamini Numbi Ramudu
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research-Central Leather Research Institute (CSIR-CLRI), Chennai, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Niraikulam Ayyadurai
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research-Central Leather Research Institute (CSIR-CLRI), Chennai, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
- Council of Scientific and Industrial Research-Centre for Cellular and Molecular Biology (CSIR-CCMB), Hyderabad, India
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11
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Mukherjee S, Shanmugam G. A Novel Surfactant with Short Hydrophobic Head and Long Hydrophilic Tail Generates Vesicles with Unique Structural Feature. Small 2023; 19:e2206906. [PMID: 36799147 DOI: 10.1002/smll.202206906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 01/20/2023] [Indexed: 05/11/2023]
Abstract
Surfactant molecules typically have a long hydrophobic tail and a short hydrophilic head group. It remains unexplored if surfactants can have a short hydrophobic head group and a long hydrophilic tail. Designing such surfactants is a challenge as a lengthy hydrophilic tail would completely solubilize the molecules. In this context, herein, the Fmoc-functionalized Gly-Pro-Hyp (GPO) tripeptide repeat-based molecule (Fm-GPO) with fluorenyl moiety as a short hydrophobic head and peptide as a long hydrophilic tail is demonstrated as a reverse surfactant at physiological pH, for the first time. π-π stacking of the fluorenyl moieties and intermolecular hydrogen bonding between the peptide chains with extended polyproline-II structure promoted the self-assembly into spherical vesicles with a unique feature of a large hydrophilic area in the interior and exterior of the bilayer. The current Fm-GPO system offers a new class of surfactants with unique features that can aid in the design of drug-loaded vehicles, which can be target-specific as the peptide chain can be manipulated with different functional ultra-short peptide sequences.
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Affiliation(s)
- Smriti Mukherjee
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Adyar, Chennai, 600020, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Ganesh Shanmugam
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Adyar, Chennai, 600020, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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12
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Shome R, Patra S, Sahib MM, Shanmugam G, Dubey S, Skariah S, Shamshad S, Barman NN, Bora DP, Shome A, Mohandoss N, Shome BR. Evaluation of an in-house IgM/IgG lateral flow assay for serodiagnosis of human brucellosis. Indian J Med Microbiol 2023; 42:55-58. [PMID: 36967218 DOI: 10.1016/j.ijmmb.2023.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 12/29/2022] [Accepted: 01/11/2023] [Indexed: 02/05/2023]
Abstract
This study aimed to evaluate the diagnostic efficacy of an in-house lateral flow assay (LFA) for the detection of IgM/IgG anti-Brucella antibodies for rapid serodiagnosis of human brucellosis. Three groups of sera samples including 476 from high-risk individuals, 27 from culture-confirmed patients, and 43 from healthy blood donors were used for evaluation of LFA. In comparison with iELISA, the sensitivity, specificity, and accuracy of LFA were >95%, >99%, and 99% respectively. Considering the very good agreement, accuracy, simplicity, and rapidity, LFAs might be useful as a point of care test for the diagnosis of human brucellosis in resource-limited laboratories.
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Affiliation(s)
- Rajeswari Shome
- Indian Council for Agricultural Research, National Institute of Veterinary Epidemiology and Disease Informatics, Bengalore, 560064, India.
| | - Sudipta Patra
- Indian Council for Agricultural Research, National Institute of Veterinary Epidemiology and Disease Informatics, Bengalore, 560064, India
| | - Muneera Mohamed Sahib
- Indian Council for Agricultural Research, National Institute of Veterinary Epidemiology and Disease Informatics, Bengalore, 560064, India
| | - G Shanmugam
- Indian Council for Agricultural Research, National Institute of Veterinary Epidemiology and Disease Informatics, Bengalore, 560064, India
| | - Shiva Dubey
- Indian Council for Agricultural Research, National Institute of Veterinary Epidemiology and Disease Informatics, Bengalore, 560064, India
| | - Somy Skariah
- Indian Council for Agricultural Research, National Institute of Veterinary Epidemiology and Disease Informatics, Bengalore, 560064, India
| | - Samer Shamshad
- Indian Council for Agricultural Research, National Institute of Veterinary Epidemiology and Disease Informatics, Bengalore, 560064, India
| | - Nagendra Nath Barman
- College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 781022, India
| | - Durlav Prasad Bora
- College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 781022, India
| | - Arijit Shome
- College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 781022, India
| | - Nagalingam Mohandoss
- Indian Council for Agricultural Research, National Institute of Veterinary Epidemiology and Disease Informatics, Bengalore, 560064, India
| | - Bibek Ranjan Shome
- Indian Council for Agricultural Research, National Institute of Veterinary Epidemiology and Disease Informatics, Bengalore, 560064, India
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13
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Unnikrishnan AC, Sushana Thennarasu A, Saveri P, Pandurangan S, Deshpande AP, Ayyadurai N, Shanmugam G. π-System Functionalization Transforms Amyloidogenic Peptide Fragment of Human Islet Amyloid Polypeptide into a Super Hydrogelator. Chem Asian J 2023; 18:e202201235. [PMID: 36567257 DOI: 10.1002/asia.202201235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 12/09/2022] [Revised: 12/22/2022] [Accepted: 12/22/2022] [Indexed: 12/27/2022]
Abstract
While a considerable number of ultra-short/short amyloid peptides have been reported to form 3D supramolecular hydrogels, they all possess high minimum gelation concentration (MGC) (≥1 wt%), which preclude their applications. In this context, we demonstrate that functionalisation of a well-known amyloidogenic ultra-short peptide fragment NFGAIL (IAPf) of human Islet amyloid polypeptide with a π-system (Fluorenyl, Fm) at the N-terminus of the peptide (Fm-IAPf) yield not only highly thermostable hydrogel at physiological pH but also exhibited super gelator nature as the MGC (0.08 wt%) falls below 0.1 wt%. Various experimental results confirmed that aromatic π-π interactions from fluorenyl moieties and hydrogen bonding interactions between the IAPf drive the self-assembly/fibril formation. Fm-IAPf is the first super hydrogelator derived from amyloid-based ultra-short peptides, to the best of our knowledge. We strongly believe that this report, i. e., functionalization of an amyloid peptide with π-system, provides a lead to develop super hydrogelators from other amyloid-forming peptide fragments for their potential applications.
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Affiliation(s)
- Anagha C Unnikrishnan
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR) -, Central Leather Research Institute (CLRI), Adyar, 600020, Chennai, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Abinaya Sushana Thennarasu
- Biological Materials Laboratory, Council of Scientific and Industrial Research (CSIR) -, Central Leather Research Institute (CLRI), Adyar, 600020, Chennai, India
| | - Puchalapalli Saveri
- Department of Chemical Engineering, Indian Institute of Technology Madras, Adyar, 600036, Chennai, India
| | - Suryalakshmi Pandurangan
- Biochemistry & Biotechnology Laboratory, Council of Scientific and Industrial Research (CSIR) -, Central Leather Research Institute (CLRI), Adyar, 600020, Chennai, India
| | - Abhijit P Deshpande
- Department of Chemical Engineering, Indian Institute of Technology Madras, Adyar, 600036, Chennai, India
| | - Niraikulam Ayyadurai
- Biochemistry & Biotechnology Laboratory, Council of Scientific and Industrial Research (CSIR) -, Central Leather Research Institute (CLRI), Adyar, 600020, Chennai, India
| | - Ganesh Shanmugam
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR) -, Central Leather Research Institute (CLRI), Adyar, 600020, Chennai, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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14
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Vignesh V, Shanmugam G. Removal and recovery of hazardous congo red from aqueous environment by selective natural amino acids in simple processes. Process Biochem 2023. [DOI: 10.1016/j.procbio.2023.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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15
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Janeena A, Jayaraman N, Shanmugam G, Easwaramoorthi S, Ayyadurai N. Electrochemical Response of Redox Amino Acid Encoded Fluorescence Protein for Hydroxychloroquine Sensing. Appl Biochem Biotechnol 2023; 195:992-1013. [PMID: 36260248 PMCID: PMC9581447 DOI: 10.1007/s12010-022-04142-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2022] [Indexed: 01/24/2023]
Abstract
The sudden rise in the demand has led to large-scale production of hydroxychloroquine (HCQ) in the global market for various diseases such as malaria, rheumatic arthritis, and systemic lupus erythematous and prophylactic treatment of early SARS-CoV-2 outbreak. Thorough monitoring of HCQ intake patients is in high demand; hence, we have developed a redox amino acid encoded fluorescent protein-based electrochemical biosensor for sensitive and selective detection of HCQ. This electrochemical biosensor is generated based on the two-electron transfer process between redox amino acid (3,4-dihydroxy-L-phenylalanine, DOPA) encoded bio-redox protein and the HCQ forms the conjugate. The DOPA residue in the bio-redox protein specifically binds with HCQ, thereby producing a remarkable electrochemical response on the glassy carbon electrode. Experimental results show that the developed biosensor selectively and sensitively detects the HCQ in spiked urine samples. The reagent-free bio-redox capacitor detects HCQ in the range of 90 nM to 4.4 µM in a solution with a detection limit of 58 nM, signal to noise ratio of 3:1, and strong anti-interference ability. Real-time screening, quantification, and relative mean recoveries of HCQ on spiked urine samples were monitored through electron shuttling using bio-redox protein and were found to be 97 to 101%. Overall, the developed bio-redox protein-based sensor has specificity, selectivity, reproducibility, and sensitivity making it potentially attractive for the sensing of HCQ and also applicable to clinical research.
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Affiliation(s)
- Asuma Janeena
- Biotechnology and Biochemistry, Council of Scientific and Industrial Research (CSIR)-Central Leather Research Institute, Chennai, India
- Academy of Scientific and Industrial Research (AcSIR), 201002, Ghaziabad, India
| | - Narayanan Jayaraman
- Inorganic and Physical Chemistry, Council of Scientific and Industrial Research (CSIR)-Central Leather Research Institute, Chennai, India
| | - Ganesh Shanmugam
- Academy of Scientific and Industrial Research (AcSIR), 201002, Ghaziabad, India
- Organic and Bio-Organic Chemistry, Council of Scientific and Industrial Research (CSIR)-Central Leather Research Institute, Chennai, India
| | - Shanmugam Easwaramoorthi
- Academy of Scientific and Industrial Research (AcSIR), 201002, Ghaziabad, India.
- Inorganic and Physical Chemistry, Council of Scientific and Industrial Research (CSIR)-Central Leather Research Institute, Chennai, India.
| | - Niraikulam Ayyadurai
- Biotechnology and Biochemistry, Council of Scientific and Industrial Research (CSIR)-Central Leather Research Institute, Chennai, India.
- Academy of Scientific and Industrial Research (AcSIR), 201002, Ghaziabad, India.
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16
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Janeena A, Nagabalaji V, Suresh P, Ramudu KN, Srinivasan SV, Shanmugam G, Ayyadurai N. Engineering microbial cells with metal chelating hydroxylated unnatural amino acids for removable of synthetic pollutants from water. Chemosphere 2023; 311:136756. [PMID: 36228731 DOI: 10.1016/j.chemosphere.2022.136756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 09/08/2022] [Accepted: 10/02/2022] [Indexed: 06/16/2023]
Abstract
Lead (Pb2+) is a well-known heavy metal and toxic synthetic industrial pollutant in the ecosystem and causes severe threats to living organisms. It is paramount to develop a sustainable microbial engineering approach to remove synthetic pollutants from the environment. Genetic code engineering is emerging as an important microbial engineering tool in biosciences to biosynthesis congener protein production beyond the canonical set of natural molecules and expand the chemistries of living cells. Here, we prepare cells expressing unnatural amino acid encoded congener proteins for effectively removable toxic synthetic industrial pollutants (Pb2+) with high binding efficiency. Native and the developed congener proteins expressing cells adapted the Langmuir and Sips adsorption model that recommends uniform adsorption with Pb2+ ions. This could be due to a more significant number of functional groups on the protein surface. Fluorescence spectroscopic, field emission scanning electron microscope, X-ray photoelectron spectroscopic analysis, and protein-metal molecular stimulation coordination allowed us to explore the role of hydroxylation on Pb2+ adsorption. The bioreactor filled with immobilized protein-containing active granules showed >90% of lead removal in the contaminated water samples. The desorption of bound Pb2+ from GFP and its variants were studied by varying the pH to reuse the proteins for subsequent usage. We observed that about 70% of the GFP and its variants could be recycled and >75% of fluorescence efficiency could be recovered. Among all the variants, GFPHPDP exhibits high affinity and maintains the reusability efficiency in 7 consecutive cycles. These results suggest that genetic code engineering of cells encoding unnatural amino acids could be a next-generation microbial engineering tool for manipulating and developing the microbial strain's selective and effective removal of synthetic pollutants from the environment.
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Affiliation(s)
- Asuma Janeena
- Biochemistry and Biotechnology Division, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India; Academy of Scientific and Industrial Research (AcSIR), Ghaziabad, 201002, India
| | - Velmurugan Nagabalaji
- Environmental Science and Engineering Division, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India
| | - Prem Suresh
- Biochemistry and Biotechnology Division, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India
| | - Kamini Numbi Ramudu
- Biochemistry and Biotechnology Division, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India; Academy of Scientific and Industrial Research (AcSIR), Ghaziabad, 201002, India
| | - Shanmugam Venkatachalam Srinivasan
- Environmental Science and Engineering Division, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India
| | - Ganesh Shanmugam
- Organic and Bioorganic Division, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India; Academy of Scientific and Industrial Research (AcSIR), Ghaziabad, 201002, India
| | - Niraikulam Ayyadurai
- Biochemistry and Biotechnology Division, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India; Academy of Scientific and Industrial Research (AcSIR), Ghaziabad, 201002, India.
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17
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Unnikrishnan AC, Shanmugam G. Isotope-edited vibrational circular dichroism study reveals a flexible N-terminal structure of islet amyloid peptide (NFGAIL) in amyloid fibril form: A site-specific local structural analysis. J Struct Biol 2022; 214:107910. [PMID: 36273786 DOI: 10.1016/j.jsb.2022.107910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 08/28/2022] [Revised: 10/13/2022] [Accepted: 10/16/2022] [Indexed: 11/06/2022]
Abstract
The short peptide fragment NFGAIL (IAPf) is a well-known amyloidogenic peptide (22-27), derived from human islet amyloid polypeptide(hIAPP), whose fibrillar structure is often used to better understand the wild-type hIAPP amyloid fibrils, associated with type II diabetes. Despite an extensive study, the fibrillar structure of IAPf at the amino acid residue level is still unclear. Herein, the vibrational circular dichroism(VCD) spectroscopic technique coupled with isotope labelling strategy has been used to study the site-specific local structure of IAPf amyloid fibrils. Two 13C labeled IAPfs were designed and used along with unlabelled IAPf to achieve this. The 13C labelled (on -C=O) glycine(IAPf-G) and phenylalanine (IAPf-F) residues were introduced into the IAPf sequence separately by replacing natural glycine (residue 24) and phenylalanine (residue 23), respectively. VCD spectral analysis on IAPf-G suggests that IAPf fibrils adopt parallel β-sheet conformation with glycine residues are part of β-sheet and in-register. Unlike IAPf-G, VCD analysis on IAPf-F reveals that phenylalanine residues exist in the turn/hairpin conformation rather than β-sheet region. Both VCD results thus suggest that IAPf amyloid fibril consists of a mixture of β-sheet as a major conformation involving GAIL and turn/hairpin as a minor conformation involving NF rather than an idealized β-sheet involving all the amino acids. While previous studies speculated that the full NFGAIL sequence could participate in the β-sheet formation, the present site-specific structural analysis of IAPf amyloid fibrils at residue level using isotope-edited VCD has gained significant attention. Such residue level information has important implications for understanding the role of NFGAIL sequence in the amyloid fibrillation of hIAPP.
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Affiliation(s)
- Anagha C Unnikrishnan
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Adyar, Chennai 600020, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India
| | - Ganesh Shanmugam
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Adyar, Chennai 600020, India.
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18
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Meganathan I, Pachaiyappan M, Aarthy M, Radhakrishnan J, Mukherjee S, Shanmugam G, You J, Ayyadurai N. Recombinant and genetic code expanded collagen-like protein as a tailorable biomaterial. Mater Horiz 2022; 9:2698-2721. [PMID: 36189465 DOI: 10.1039/d2mh00652a] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Collagen occurs in nature with a dedicated triple helix structure and is the most preferred biomaterial in commercialized medical products. However, concerns on purity, disease transmission, and the reproducibility of animal derived collagen restrict its applications and warrants alternate recombinant sources. The expression of recombinant collagen in different prokaryotic and eukaryotic hosts has been reported with varying degrees of success, however, it is vital to elucidate the structural and biological characteristics of natural collagen. The recombinant production of biologically functional collagen is restricted by its high molecular weight and post-translational modification (PTM), especially the hydroxylation of proline to hydroxyproline. Hydroxyproline plays a key role in the structural stability and higher order self-assembly to form fibrillar matrices. Advancements in synthetic biology and recombinant technology are being explored for improving the yield and biomimicry of recombinant collagen. It emerges as reliable, sustainable source of collagen, promises tailorable properties and thereby custom-made protein biomaterials. Remarkably, the evolutionary existence of collagen-like proteins (CLPs) has been identified in single-cell organisms. Interestingly, CLPs exhibit remarkable ability to form stable triple helical structures similar to animal collagen and have gained increasing attention. Strategies to expand the genetic code of CLPs through the incorporation of unnatural amino acids promise the synthesis of highly tunable next-generation triple helical proteins required for the fabrication of smart biomaterials. The review outlines the importance of collagen, sources and diversification, and animal and recombinant collagen-based biomaterials and highlights the limitations of the existing collagen sources. The emphasis on genetic code expanded tailorable CLPs as the most sought alternate for the production of functional collagen and its advantages as translatable biomaterials has been highlighted.
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Affiliation(s)
- Ilamaran Meganathan
- Division of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - CLRI, Chennai, India.
| | - Mohandass Pachaiyappan
- Division of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - CLRI, Chennai, India.
| | - Mayilvahanan Aarthy
- Division of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - CLRI, Chennai, India.
| | - Janani Radhakrishnan
- Division of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - CLRI, Chennai, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Smriti Mukherjee
- Division of Organic and Bio-organic Chemistry, Council of Scientific and Industrial Research (CSIR) - CLRI, Chennai, India
| | - Ganesh Shanmugam
- Division of Organic and Bio-organic Chemistry, Council of Scientific and Industrial Research (CSIR) - CLRI, Chennai, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Jingjing You
- Save Sight Institute, Sydney Medical School, University of Sydney, Australia
| | - Niraikulam Ayyadurai
- Division of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - CLRI, Chennai, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
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19
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Fatehi Hassanabad A, Schoettler FI, Kent WD, Adams CA, Holloway DD, Ali IS, Novick RJ, Ahsan MR, McClure RS, Shanmugam G, Kidd WT, Kieser TM, Fedak PW, Deniset JF. Comprehensive characterization of the postoperative pericardial inflammatory response: Potential implications for clinical outcomes. JTCVS Open 2022; 12:118-136. [PMID: 36590740 PMCID: PMC9801292 DOI: 10.1016/j.xjon.2022.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 08/23/2022] [Accepted: 09/06/2022] [Indexed: 01/04/2023]
Abstract
Objective There is a paucity of data on the inflammatory response that takes place in the pericardial space after cardiac surgery. This study provides a comprehensive assessment of the local postoperative inflammatory response. Methods Forty-three patients underwent cardiotomy, where native pericardial fluid was aspirated and compared with postoperative pericardial effluent collected at 4, 24, and 48 hours' postcardiopulmonary bypass. Flow cytometry was used to define the levels and proportions of specific immune cells. Samples were also probed for concentrations of inflammatory cytokines, matrix metalloproteinases (MMPs), and tissue inhibitors of metalloproteinases (TIMPs). Results Preoperatively, the pericardial space mainly contains macrophages and T cells. However, the postsurgical pericardial space was populated predominately by neutrophils, which constituted almost 80% of immune cells present, and peaked at 24 hours. When surgical approaches were compared, minimally invasive surgery was associated with fewer neutrophils in the pericardial space at 4 hours' postsurgery. Analysis of the intrapericardial concentrations of inflammatory mediators showed interleukin-6, MMP-9, and TIMP-1 to be highest postsurgery. Over time, MMP-9 concentrations decreased significantly, whereas TIMP-1 levels increased, resulting in a significant reduction of the ratio of MMP:TIMP after surgery, suggesting that active inflammatory processes may influence extracellular matrix remodeling. Conclusions These results show that cardiac surgery elicits profound alterations in the immune cell profile in the pericardial space. Defining the cellular and molecular mediators that drive pericardial-specific postoperative inflammatory processes may allow for targeted therapies to reduce immune-mediated complications.
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Key Words
- AVR, aortic valve replacement
- CABG, coronary artery bypass graft
- CD, cluster of differentiation
- CPB, cardiopulmonary bypass
- DC, dendritic cell
- ECM, extracellular matrix
- FS, full median sternotomy
- IL, interleukin
- IL-1Ra, interleukin-1 receptor antagonist
- Inf DC, inflammatory dendritic cell
- MICS, minimally invasive cardiac surgery
- MMP, matrix metalloproteinase
- MMPtot, total matrix metalloproteinases
- Mφ, macrophage
- NK, natural killer cell
- PAOF, postoperative atrial fibrillation
- PPS, postpericardiotomy syndrome
- RAMT-AVR, right anterior minithoracotomy aortic valve replacement
- SSC, side scatter
- TGFβ, transforming growth factor-beta
- TIMP, tissue inhibitor of metalloproteinases
- TIMPtot, total tissue inhibitors of metalloproteinases
- cDC, classical dendritic cell
- conventional cardiac surgery
- inflammation
- minimally invasive cardiac surgery
- pericardial space
- postoperative pericardial fluid
- sAVR, conventional full median sternotomy surgical aortic valve replacement
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Affiliation(s)
- Ali Fatehi Hassanabad
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Friederike I. Schoettler
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Cardiac Surgery, Medical Faculty, University Hospital Düsseldorf, Heinrich-Heine-University, Düsseldorf, Germany
| | - William D.T. Kent
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Corey A. Adams
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Daniel D. Holloway
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Imtiaz S. Ali
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Richard J. Novick
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Critical Care Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Muhammad R. Ahsan
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Robert Scott McClure
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Ganesh Shanmugam
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - William T. Kidd
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Teresa M. Kieser
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Paul W.M. Fedak
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Justin F. Deniset
- Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Cardiac Sciences, Libin Cardiovascular Institute, Calgary, Alberta, Canada
- Address for reprints: Justin F. Deniset, PhD, Department of Physiology & Pharmacology, Department of Cardiac Sciences, Libin Cardiovascular Institute Cumming School of Medicine, Health Research Innovation Centre, University of Calgary, 3330 Hospital Dr NW, Room GAC56, Calgary, Alberta, Canada, T2N 4N1.
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Meganathan I, Sundarapandian A, Shanmugam G, Ayyadurai N. Three-dimensional tailor-made collagen-like proteins hydrogel for tissue engineering applications. Biomater Adv 2022; 139:212997. [PMID: 35882145 DOI: 10.1016/j.bioadv.2022.212997] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 05/23/2022] [Accepted: 06/19/2022] [Indexed: 06/15/2023]
Abstract
Despite the potential tunable properties of blank slate collagen-like proteins (CLP), an alternative to animal-originated collagen, assembling them into a stable 3D hydrogel to mimic extracellular matrix is a challenge. To address this constraint, the CLP (without hydroxyproline, CLPpro) and its variants encoding functional unnatural amino acids such as hydroxyproline (CLPhyp) and 3,4-dihydroxyphenylalanine (CLPdopa) were generated through genetic code engineering for 3D hydrogel development. The CLPhyp and CLPdopa were chosen to enhance the intermolecular hydrogen bond interaction through additional hydroxyl moiety and thereby facilitate the self-assembly into a fibrillar network of the hydrogel. Hydrogelation was induced through genipin as a cross-linker, enabling intermolecular cross-linking to form a hydrogel. Spectroscopic and rheological analyses confirmed that CLPpro and its variants maintained native triple-helical structure, which is necessary for its function, and viscoelastic nature of the hydrogels, respectively. Unlike CLPpro, the varients (CLPhyp and CLPdopa) increased pore size formation in the hydrogel scaffold, facilitating 3T3 fibroblast cell interactions. DSC analysis indicated that the stability of the hydrogels got increased upon the genetic incorporation of hydroxyproline (CLPhyp) and dopa (CLPdopa) in CLPpro. In addition, CLPdopa hydrogel was found to be relatively stable against collagenase enzyme compared to CLPpro and CLPhyp. It is the first report on 3D biocompatible hydrogel preparation by tailoring CLP sequence with non-natural amino acids. These next-generation tunable CLP hydrogels open a new venue to design synthetic protein-based biocompatible 3D biomaterials for tissue engineering applications.
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Affiliation(s)
- Ilamaran Meganathan
- Division of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute, Chennai, Tamilnadu, India
| | - Ashokraj Sundarapandian
- Division of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute, Chennai, Tamilnadu, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India
| | - Ganesh Shanmugam
- Division of Organic and Bioorganic Chemistry, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute, Chennai, Tamilnadu, India.
| | - Niraikulam Ayyadurai
- Division of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute, Chennai, Tamilnadu, India.
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21
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Veettil SP, Gopinath A, Madhan B, Shanmugam G. A cyclodextrin-based macrocyclic oligosaccharide cavitand with a dual functionality limits the collagen fibrillogenesis: A possible carbohydrate-based therapeutic molecule for fibrotic diseases. Int J Biol Macromol 2022; 207:222-231. [PMID: 35259432 DOI: 10.1016/j.ijbiomac.2022.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 09/11/2021] [Revised: 02/16/2022] [Accepted: 03/02/2022] [Indexed: 11/05/2022]
Abstract
β-Cyclodextrin (β-CD), a macrocyclic oligosaccharide cavitand, is a well-known candidate for drug delivery and formulation. In this study, we extended the application of β-CD using a β-cyclodextrin sulfate (β-CDS) as a possible therapeutic for fibrotic diseases caused by excess deposition of collagen fibrils. We have strategically chosen β-CDS, which mimics the natural existence of dermatan sulfate in the extracellular matrix, for limiting collagen fibrillation. The hydrophobic nature of the inner core β-CDS is expected to form an inclusion complex with hydrophobic side chain amino acids with the simultaneous action of forming an ionic bond through a negative charge on sulfate group with positively charged amino acids side chain in collagen. Various results suggested that such dual action not only limited the collagen fibrillation but also reduced the fibril size formed in the presence of β-CDS. The contemporary results thus indicate that β-CDS can be explored as a therapeutic molecule in fibrotic diseases.
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Affiliation(s)
- Sruthi Puthan Veettil
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Adyar, Chennai 600020, India
| | - Arun Gopinath
- CARE Division, CSIR-CLRI, Adyar, Chennai 600020, India
| | | | - Ganesh Shanmugam
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Adyar, Chennai 600020, India.
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22
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Duraisamy DK, Sureshbhai PD, Saveri P, Deshpande AP, Shanmugam G. A “self-shrinking” supramolecular hydrogel with a 3D shape memory performance from an unnatural amino acid derivative. Chem Commun (Camb) 2022; 58:13377-13380. [DOI: 10.1039/d2cc05507d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A supramolecular hydrogel with a 3D self-shrinking, without any assistance, and a shape memory performance at room temperature is discovered from an unnatural amino acid derivative i.e Fluorenylmethoxycarbonyl-L-β-phenylalanine as a...
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23
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George A, Indhu M, Ashokraj S, Shanmugam G, Ganesan P, Kamini NR, Ayyadurai N. Genetically encoded dihydroxyphenylalanine coupled with tyrosinase for strain promoted labeling. Bioorg Med Chem 2021; 50:116460. [PMID: 34757293 DOI: 10.1016/j.bmc.2021.116460] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 06/21/2021] [Revised: 09/25/2021] [Accepted: 10/05/2021] [Indexed: 10/20/2022]
Abstract
Protein modifications through genetic code engineering have a remarkable impact on macromolecule engineering, protein translocation, protein-protein interaction, and cell biology. We used the newly developed molecular biology approach, genetic code engineering, for fine-tuning of proteins for biological availability. Here, we have introduced 3, 4-dihydroxy-l-phenylalanine in recombinant proteins by selective pressure incorporation method for protein-based cell labeling applications. The congener proteins treated with tyrosinase convert 3, 4-dihydroxy-l-phenylalanine to dopaquinone for strain-promoted click chemistry. Initially, the single-step Strain-Promoted Oxidation-Controlled Cyclooctyne-1,2-quinone Cycloaddition was studied using tyrosinase catalyzed congener protein and optimized the temporally controlled conjugation with (1R,8S,9s)-Bicyclo[6.1.0]non-4-yn-9-ylmethanol. Then, the feasibility of tyrosinase-treated congener annexin A5 with easily reactive quinone functional moiety was conjugated with fluorescent tag dibenzocyclooctyne-PEG4-TAMRA for labeling of apoptotic cells. Thus, the congener proteins-based products demonstrate selective cell labeling and apoptosis detection in EA.hy926 cells even after the protein modifications. Hence, genetic code engineering can be coupled with click chemistry to develop various protein-based fluorescent labels.
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Affiliation(s)
- Augustine George
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India
| | - Mohan Indhu
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Sundarapandian Ashokraj
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Ganesh Shanmugam
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India; Division of Organic and Bio-Organic Chemistry, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India
| | - Ponesakki Ganesan
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India
| | - Numbi Ramudu Kamini
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India
| | - Niraikulam Ayyadurai
- Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Chennai, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India.
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24
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Sonallya T, Sruthi L, Deshpande AP, Shanmugam G. Tweaking of supramolecular hydrogel property of single and two-component gel systems by a bifunctional molecule. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116945] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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25
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Arokianathan JF, Ramya KA, Deshpande AP, Leemarose A, Shanmugam G. Supramolecular organogel based on di-Fmoc functionalized unnatural amino acid: An attempt to develop a correlation between molecular structure and ambidextrous gelation. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126430] [Citation(s) in RCA: 3] [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] [Indexed: 12/29/2022]
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26
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Augustine G, Aarthy M, Thiagarajan H, Selvaraj S, Kamini NR, Shanmugam G, Ayyadurai N. Self-Assembly and Mechanical Properties of Engineered Protein Based Multifunctional Nanofiber for Accelerated Wound Healing. Adv Healthc Mater 2021; 10:e2001832. [PMID: 33480482 DOI: 10.1002/adhm.202001832] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 10/19/2020] [Revised: 12/05/2020] [Indexed: 12/15/2022]
Abstract
The present work reports a new route for preparing tunable multifunctional biomaterials through the combination of synthetic biology and material chemistry. Genetically encoded catechol moiety is evolved in a nanofiber mat with defined surface and secondary reactive functional chemistry, which promotes self-assembly and wet adhesion property of the protein. The catechol moiety is further exploited for the controlled release of boric acid that provides a congenial cellular microenvironment for accelerated wound healing. The presence of 3,4-dihydroxyphenylalanine in the nanofiber mat act as a stimulus to trigger cell proliferation, migration, and vascularization to accelerate wound healing. Electron paramagnetic resonance, NMR, FTIR, and circular dichroism spectroscopy confirm the structural integrity, antioxidant property, and controlled release of boric acid. Fluorescent and scanning electron microscopy reveals the 3D architecture of nanofiber mat, which favors fibroblast growth, endothelial cell attachment, and tube formation, which are the desirable properties of a wound-healing material. Animal studies in the murine wound healing model assert that the multifunctional biomaterial significantly improve re-epithelialization and accelerate wound closure.
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Affiliation(s)
- George Augustine
- Department of Biochemistry and Biotechnology Council of Scientific and Industrial Research (CSIR)—Central Leather Research Institute (CLRI) Chennai 600020 India
| | - Mayilvahanan Aarthy
- Department of Biochemistry and Biotechnology Council of Scientific and Industrial Research (CSIR)—Central Leather Research Institute (CLRI) Chennai 600020 India
| | - Hemalatha Thiagarajan
- Department of Biochemistry and Biotechnology Council of Scientific and Industrial Research (CSIR)—Central Leather Research Institute (CLRI) Chennai 600020 India
| | - Sowmya Selvaraj
- Inorganic and Physical Chemistry Laboratory Council of Scientific and Industrial Research—Central Leather Research Institute Adyar Chennai 600020 India
| | - Numbi Ramdu Kamini
- Department of Biochemistry and Biotechnology Council of Scientific and Industrial Research (CSIR)—Central Leather Research Institute (CLRI) Chennai 600020 India
| | - Ganesh Shanmugam
- Department of Organic and Bioorganic chemistry Council of Scientific and Industrial Research (CSIR)—Central Leather Research Institute (CLRI) Chennai 600020 India
| | - Niraikulam Ayyadurai
- Department of Biochemistry and Biotechnology Council of Scientific and Industrial Research (CSIR)—Central Leather Research Institute (CLRI) Chennai 600020 India
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27
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Ilamaran M, Sundarapandian A, Aarthy M, Shanmugam G, Ponesakki G, Ramudu KN, Niraikulam A. Growth factor-mimicking 3,4-dihydroxyphenylalanine-encoded bioartificial extracellular matrix like protein promotes wound closure and angiogenesis. Biomater Sci 2020; 8:6773-6785. [PMID: 33141121 DOI: 10.1039/d0bm01379j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The present work reports a new route to prepare a "smart biomaterial" by mimicking long-acting cellular growth factor showing enhanced cell-material interactions by promoting cell proliferation and angiogenesis. For that, reactive non-proteogenic amino acid 3,4-dihydroxyphenylalanine (DOPA) was genetically introduced into an intrinsic triple-helical hierarchical structure forming protein to initiate hierarchical self-assembly to form a macromolecular structure. The self-assembled scaffold displayed vascular endothelial growth factor mimicking the pro-angiogenic reactive group for repairing and remodeling of damaged tissue cells. We customized the recombinant collagen-like protein (CLP) with DOPA to promote rapid wound healing and cell migrations. Selective incorporation of catechol in variable and C-terminal region of CLP enhanced interaction between inter- and intra-triple-helical collagen molecules that resulted in a structure resembling higher-order native collagen fibril. Turbidity analysis indicated that the triple-helical CLP self-assembled at neutral pH via a catechol intra-crosslinking mechanism. After self-assembly, only DOPA-encoded CLP formed branched filamentous structures suggesting that catechol mediated network coordination. The catechol-encoded CLP also acted as a "smart material" by mimicking long-acting cellular growth factor showing enhanced cell-material interactions by promoting cell proliferation and angiogenesis. It eliminates release rate, stability, and shelf-life of hybrid growth factor conjugated biomaterials. The newly synthesized CLP has the potential to promote accelerated cell migration, pro-angiogenesis, and biocompatibility and could be used in the field of implantable medical devices and tissue engineering.
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Affiliation(s)
- Meganathan Ilamaran
- Division of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR) - CLRI, Chennai, India.
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28
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Thankachan SN, Ilamaran M, Ayyadurai N, Shanmugam G. Insights into the effect of artificial sweeteners on the structure, stability, and fibrillation of type I collagen. Int J Biol Macromol 2020; 164:748-758. [PMID: 32693139 DOI: 10.1016/j.ijbiomac.2020.07.152] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 06/16/2020] [Revised: 07/09/2020] [Accepted: 07/13/2020] [Indexed: 01/05/2023]
Abstract
Artificial sweeteners (AS) are widely used as sugar substitutes because natural sweetener (sugar) leads to a number of health issues, including diabetes, obesity, and tooth decay. Since natural sugar (sucrose), diabetes and skin are highly interlinked, and also sucrose is known to inhibit the fibrillation of collagen, the major protein of the skin, a study on the impact of AS on collagen is important and essential. Herein, we have studied the influence of commonly used AS such as Sucralose (SUC), Aspartame (APM), and Saccharin (SAC) on the structure, stability, and fibrillation of collagen using various spectroscopic methods. The circular dichroism and turbidity results suggest that the AS does not disrupt the triple helix structure and also the fibrillar property of collagen, respectively. The fibrillar morphology was sustained, although there was a trivial difference in the entanglement of fibrils in the presence of SAC, compared to native collagen fibrils. The thermal stability of collagen is maintained in the presence of AS. Fluorescence and STD-NMR results indicate that the interaction between AS and collagen was weak, which supports the intact structure, stability, and fibrillation property of collagen. The current study thus suggests that the chosen AS does not influence collagen properties.
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Affiliation(s)
- Soumya N Thankachan
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Adyar, Chennai 600020, India
| | - Meganathan Ilamaran
- Biochemistry and Biotechnology Division, CSIR-CLRI, Adyar, Chennai 600020, India
| | - Niraikulam Ayyadurai
- Biochemistry and Biotechnology Division, CSIR-CLRI, Adyar, Chennai 600020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-CLRI Campus, Chennai 600020, India
| | - Ganesh Shanmugam
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR) - Central Leather Research Institute (CLRI), Adyar, Chennai 600020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-CLRI Campus, Chennai 600020, India.
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29
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Ramya KA, Reddy SMM, Shanmugam G, Deshpande AP. Fibrillar Network Dynamics during Oscillatory Rheology of Supramolecular Gels. Langmuir 2020; 36:13342-13355. [PMID: 33107300 DOI: 10.1021/acs.langmuir.0c02641] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Supramolecular gels are three-dimensional network structures formed by the hierarchical self-assembly of small molecules through weak noncovalent interactions. On the basis of the various interactions contributed by specific functional groups/moieties, gels with different architectures can be constructed that are smart to the external stimuli such as pH, type of solvent, stress, temperature, etc. In the present work, we explore the oscillatory shear response of supramolecular self-assembled systems formed by the low-molecular-weight (LMW) gelator based on difunctionalized amino acid, florenylmethoxycarbonyl (Fmoc)-lysine(Fmoc), Fm-K(Fm) in aqueous buffer solution, at two different pH (6 and 7.4). Small amplitude oscillatory shear (SAOS) reported weak frequency dependence of moduli indicating a gel-like network structure. Large amplitude oscillatory shear (LAOS) indicated flow regimes dictated by yielding and subsequent network dynamics analogous to cagelike soft glassy events reported for colloidal systems. The three interval thixotropy test (3iTT) indicated recovery of moduli due to regelation contributed by the reversible interactions. A generalized network model framework is utilized to investigate the transient network characteristics of the Fm-K(Fm) gels. The "network creation" and "network loss" rates were chosen as exponential functions of scaled shear stress (= |τ12(t)G|) to effectively describe the complex response. On the basis of the insights, possible mechanisms to explain the differences/similarities in the response at different pH are speculated. It is further illustrated that the modeling strategy can be extended to supramolecular gels of different classes because of the commonality/universality of their response features under oscillatory shear.
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Affiliation(s)
- Koduvayur A Ramya
- Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai 600036, India
| | - Samala Murali Mohan Reddy
- Academy of Scientific and Innovative Research, Anusandhan Bhawan, 2 Rafi Marg, New Delhi 110001, India
| | - Ganesh Shanmugam
- Academy of Scientific and Innovative Research, Anusandhan Bhawan, 2 Rafi Marg, New Delhi 110001, India
| | - Abhijit P Deshpande
- Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai 600036, India
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30
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Ramakrishnan R, Gimbun J, Ramakrishnan P, Ranganathan B, Reddy SMM, Shanmugam G. Effect of Solution Properties and Operating Parameters on Needleless Electrospinning of Poly(Ethylene Oxide) Nanofibers Loaded with Bovine Serum Albumin. Curr Drug Deliv 2020; 16:913-922. [PMID: 31663478 DOI: 10.2174/1567201816666191029122445] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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: 02/22/2019] [Revised: 05/28/2019] [Accepted: 10/15/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND This paper presents the effect of solution properties and operating parameters of polyethylene oxide (PEO) based nanofiber using a wire electrode-based needleless electrospinning. METHODS The feed solution was prepared using a PEO dissolved in water or a water-ethanol mixture. The PEO solution is blended with Bovine Serum Albumin protein (BSA) as a model drug to study the effect of the electrospinning process on the stability of the loaded protein. The polymer solution properties such as viscosity, surface tension, and conductivity were controlled by adjusting the solvent and salt content. The morphology and fiber size distribution of the nanofiber was analyzed using scanning electron microscopy. RESULTS The results show that the issue of a beaded nanofiber can be eliminated either by increasing the solution viscosity or by the addition of salt and ethanol to the PEO-water system. The addition of salt and solvent produced a high frequency of smaller fiber diameter ranging from 100 to 150 nm. The encapsulation of BSA in PEO nanofiber was characterized by three different spectroscopy techniques (i.e. circular dichroism, Fourier transform infrared, and fluorescence) and the results showed the BSA is well encapsulated in the PEO matrix with no changes in the protein structure. CONCLUSION This work may serve as a useful guide for a drug delivery industry to process a nanofiber at a large and continuous scale with a blend of drugs in nanofiber using a wire electrode electrospinning.
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Affiliation(s)
- Ramprasath Ramakrishnan
- Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, Gambang 26300, Pahang, Malaysia
| | - Jolius Gimbun
- Centre of Excellence for Advanced Research in Fluid Flow (CARIFF), Universiti Malaysia Pahang, Gambang 26300, Pahang, Malaysia
| | - Praveen Ramakrishnan
- Department of Materials Science, Central University of Tamil Nadu, Neelakudi, Thirvarur 610 005, India
| | - Balu Ranganathan
- Palms Connect LLC, Showcase Lane, Sandy, 84094, Utah, United States
| | - Samala Murali Mohan Reddy
- Organic & Bioorganic Chemistry, CSIR-Central Leather Research Institute, Adyar, Chennai - 600 020, India
| | - Ganesh Shanmugam
- Organic & Bioorganic Chemistry, CSIR-Central Leather Research Institute, Adyar, Chennai - 600 020, India
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31
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Lee JS, Cinanni N, Di Cristofaro N, Lee S, Dillenburg R, Adamo KB, Mondal T, Barrowman N, Shanmugam G, Timmons BW, Longmuir PW. Parents of Very Young Children with Congenital Heart Defects Report Good Quality of Life for Their Children and Families Regardless of Defect Severity. Pediatr Cardiol 2020; 41:46-53. [PMID: 31701166 DOI: 10.1007/s00246-019-02220-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 10/15/2019] [Indexed: 10/25/2022]
Abstract
The purpose of this study was to investigate parent reports of quality of life for their very young children with congenital heart defects (CHD) and to compare their scores to previously published data. Parents of children 1-3 years old with CHD or innocent heart murmurs completed the Pediatric Quality of Life Inventory (PedsQL) core, cardiac, and family impact modules. Multivariable regression analyses assessed the impact of age, sex, family income, and CHD treatment history (study group) on PedsQL scores. Correlations between family impact and core/cardiac modules were examined. PedsQL scores were compared to healthy norms. 140 parents of young children participated within four study groups: CHD no treatment (n = 44), CHD treatment without bypass (n = 26), CHD treatment with bypass (n = 42) ,and innocent heart murmurs (n = 28). Male sex was associated with higher core (F = 4.16, p = 0.04, σ2 = .03) and cardiac quality of life (F = 4.41, p = .04, σ2 = 0.04). Higher family income was associated with higher family quality of life (F = 8.89, p < .01, σ2 = 0.13). Parents of children with innocent heart murmurs and children with CHD not requiring treatment had higher core quality of life compared to young healthy children. Cardiac-related quality of life scores were associated with family impact (r = 0.68) and core module (r = 0.63) quality of life scores. Parents of very young children with CHD report good quality of life for their children and families. Quality of life exceeds in children with innocent murmurs or CHD not requiring repair. Parents report a lower quality of life among girls, and lower family quality of life is associated with lower family income.
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Affiliation(s)
- J S Lee
- Children's Hospital of Eastern Ontario Research Institute, 401 Smyth Road, RI#1-214, Ottawa, ON, K1H 8L1, Canada. .,Faculty of Health Science, University of Ottawa, Ottawa, Canada.
| | - N Cinanni
- Children's Hospital of Eastern Ontario Research Institute, 401 Smyth Road, RI#1-214, Ottawa, ON, K1H 8L1, Canada
| | | | - S Lee
- Children's Hospital of Eastern Ontario Research Institute, 401 Smyth Road, RI#1-214, Ottawa, ON, K1H 8L1, Canada.,Children's Hospital of Eastern Ontario, Ottawa, Canada
| | - R Dillenburg
- McMaster University, Hamilton, Canada.,McMaster Children's Hospital, Hamilton, Canada
| | - K B Adamo
- Children's Hospital of Eastern Ontario Research Institute, 401 Smyth Road, RI#1-214, Ottawa, ON, K1H 8L1, Canada.,Faculty of Health Science, University of Ottawa, Ottawa, Canada
| | - T Mondal
- McMaster University, Hamilton, Canada.,McMaster Children's Hospital, Hamilton, Canada
| | - N Barrowman
- Children's Hospital of Eastern Ontario Research Institute, 401 Smyth Road, RI#1-214, Ottawa, ON, K1H 8L1, Canada
| | - G Shanmugam
- Children's Hospital of Eastern Ontario, Ottawa, Canada
| | - B W Timmons
- McMaster University, Hamilton, Canada.,McMaster Children's Hospital, Hamilton, Canada
| | - P W Longmuir
- Children's Hospital of Eastern Ontario Research Institute, 401 Smyth Road, RI#1-214, Ottawa, ON, K1H 8L1, Canada.,Faculty of Health Science, University of Ottawa, Ottawa, Canada.,Faculty of Medicine, University of Ottawa, Ottawa, Canada
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Arokianathan JF, Ramya KA, Janeena A, Deshpande AP, Ayyadurai N, Leemarose A, Shanmugam G. Non-proteinogenic amino acid based supramolecular hydrogel material for enhanced cell proliferation. Colloids Surf B Biointerfaces 2019; 185:110581. [PMID: 31677412 DOI: 10.1016/j.colsurfb.2019.110581] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 07/03/2019] [Revised: 10/11/2019] [Accepted: 10/13/2019] [Indexed: 12/21/2022]
Abstract
Supramolecular gel material built from low-molecular-weight (LMW) gelators finds potential applications in various fields, especially in drug delivery, cell encapsulation and delivery, and tissue engineering. The majority of the LMW gelators in these applications are based on functionalized peptides/amino acids consisting of proteinogenic amino acids which are proteolytically unstable. Herein, we have developed a new LMW gelator containing non-proteinogenic amino acid namely 2,3-diaminopropionic acid (Dap), a key precursor in the synthesis of many antibiotics namely viomycin and capreomycin, by functionalizing with fluorenylmethoxycarbonyl at both amino terminals of Dap [Fm-Dap(Fm)]. Hydrogelation test at different pH indicates that Fm-Dap(Fm) can form a hydrogel in a wide range of pH (4.9 to 9.1) with minimum hydrogelation concentration depends on the pH. The mechanical strength and thermal stability of the Fm-Dap(Fm) hydrogel material are found to decrease with increasing pH (acidic > neural/physiological > basic). The thermal stability of Fm-Dap(Fm) hydrogels is pH-dependent and elicits high stability at acidic pH. Also, Fm-Dap(Fm) hydrogels exhibit strong thixotropic property where regelation (self-healing) occurs upon release of stress. Morphological analysis indicates the formation of fibrils, which are entangled to form three dimensional network structures. Several spectroscopic measurements provided evidence for the self-assembly of Fm-Dap(Fm) molecules through intermolecular aromatic π-π stacking and hydrogen bonding interactions during hydrogelation. Interestingly, Fm-Dap(Fm) not only exhibits hydrogel formation but also shows cell viability and enhanced cell proliferation at physiological pH (7.4). Further, Fm-Dap(Fm) forms a hydrogel upon co-incubation with vitamin B12 and also exhibits release of vitamin B12 over a period. The current study thus demonstrates the development of a new hydrogel material, based on LMW gelator containing the non-proteinogenic amino acid, which can elicit cell viability, enhanced cell proliferation, drug encapsulation, and drug release properties. Hence, Fm-Dap(Fm) hydrogel could be an ideal material for biomedical applications, especially in tissue engineering and drug delivery.
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Affiliation(s)
- Jaini Flora Arokianathan
- Organic & Bioorganic Chemistry Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai-600 020, India; Department of Chemistry, Holy Cross College (Autonomous), Tiruchirapalli, 620 002, India
| | - Koduvayur A Ramya
- Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai 600036, India
| | - Asuma Janeena
- Biochemistry & Biotechnology Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai-600020, India
| | - Abhijit P Deshpande
- Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai 600036, India
| | - Niraikulam Ayyadurai
- Biochemistry & Biotechnology Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai-600020, India
| | - Ambrose Leemarose
- Department of Chemistry, Holy Cross College (Autonomous), Tiruchirapalli, 620 002, India
| | - Ganesh Shanmugam
- Organic & Bioorganic Chemistry Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai-600 020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-CLRI Campus, Adyar, Chennai-600 020, India.
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Ilamaran M, Janeena A, Valappil S, Ramudu KN, Shanmugam G, Niraikulam A. A self-assembly and higher order structure forming triple helical protein as a novel biomaterial for cell proliferation. Biomater Sci 2019; 7:2191-2199. [PMID: 30900708 DOI: 10.1039/c9bm00186g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Collagen plays a critical role in the structural design of the extracellular matrix (ECM) and cell signaling in mammals, which makes it one of the most promising biomaterials with versatile applications. However, there is considerable concern regarding the purity and predictability of the product performance. At present, it is mainly derived as a mixture of collagen (different types) from animal tissues, where the selective enrichment of a particular type of collagen is generally difficult and expensive. Collagen derived from bovine sources poses the risk of transmitting diseases and can cause adverse immunologic and inflammatory responses. Hence, recombinant collagen can be a good alternative. Nevertheless, the necessity of post-translational hydroxyproline (Hyp) modification limits large-scale recombinant collagen production. Here, we recombinantly expressed the collagen-like protein (CLTP) and genetically introduced the Hyp in the CLTP to form a higher order self-assembled fibril structure, similar to human collagen. During the current study, it was observed that the Hyp incorporated CLTP protein (CLTHP) formed a stable triple helical polyproline-II like structure and self-assembled to form fibrils at neutral pH, which had an initial lag phase followed by a growth phase similar to animal collagen. In contrast, the higher order fibrillar assembly was missing in the nonhydroxylated CLTP. This study demonstrated that CLTHP self-association is based on the common underlying lateral interactions between triple helical structured proteins, where the hydroxyproline forms the significantly stable hydration network. Hence, this work will be the first fundamental empirical research for flexible modifications of recombinant collagen for structural analysis and biomedical applications.
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Affiliation(s)
- Meganathan Ilamaran
- Division of Biochemistry and Biotechnology, Council of Scientific and Industrial Research-Central Leather Research Institute (CSIR-CLRI), Chennai, India.
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Abstract
OBJECTIVE (a) To provide a comprehensive review of current literature on the surgical management of atrial fibrillation (AF), highlighting surgical approaches and outcomes. (b) To summarize the latest guidelines pertinent to the surgical management of AF. BACKGROUND AF is associated with high rates of morbidity and mortality, primarily related to the associated risk of stroke. The mainstay of management is pharmacologic rate or rhythm control and catheter-based ablation. Surgical ablation (SA) is an alternative strategy that is effective in select patient populations. Recently, novel techniques and technologies have been introduced and this has expanded the surgical capacity to manage AF. METHODS A comprehensive review of the literature was conducted. RESULTS Surgery can be a highly effective alternative therapeutic option for the management of AF in the appropriate patient population. The need for permanent pacemaker implantation is controversial among patients undergoing surgical intervention for AF. Surgical outcomes are promising, with long-term control of AF and symptomatic relief achieved in select groups of patients. CONCLUSIONS This article provides a comprehensive review of the surgical management of AF. We have summarized the latest surgical outcomes and contextualized the most recent guidelines.
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Affiliation(s)
- Ali Fatehi Hassanabad
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada
| | - Hallie L Jefferson
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada
| | - Ganesh Shanmugam
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada
| | - William D T Kent
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada
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Augustine G, Raghavan S, NumbiRamudu K, Easwaramoorthi S, Shanmugam G, Seetharani Murugaiyan J, Gunasekaran K, Govind C, Karunakaran V, Ayyadurai N. Excited State Electronic Interconversion and Structural Transformation of Engineered Red-Emitting Green Fluorescent Protein Mutant. J Phys Chem B 2019; 123:2316-2324. [PMID: 30789731 DOI: 10.1021/acs.jpcb.8b10516] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Red fluorescent proteins with a large Stokes shift offer a limited autofluorescence background and are used in deep tissue imaging. Here, by introducing the free amino group in Aequorea victoria, the electrostatic charges of the p-hydroxybenzylidene imidazolinone chromophore of green fluorescent protein (GFP) have been altered resulting in an unusual, 85 nm red-shifted fluorescence. The structural and biophysical analysis suggested that the red shift is due to positional shift occupancy of Glu222 and Arg96, resulting in extended conjugation and a relaxed chromophore. Femtosecond transient absorption spectra exhibited that the excited state relaxation dynamics of red-shifted GFP (rGFP) (τ4 = 234 ps) are faster compared to the A. victoria green fluorescent protein (τ4 = 3.0 ns). The nanosecond time-resolved emission spectra of rGFP reveal the continuous spectral shift during emission by a solvent reorientation in the chromophore. Finally, the molecular dynamics simulations revealed the rearrangement of the hydrogen bond interactions in the chromophore vicinity, reshaping the symmetric distribution of van der Waals space to fine tune the GFP structure resulting from highly red-shifted rGFP.
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Affiliation(s)
- George Augustine
- Department of Biochemistry and Biotechnology , Council of Scientific and Industrial Research-Central Leather Research Institute (CSIR-CLRI) , Chennai 600 020 , India
| | - Sriram Raghavan
- Department of Crystallography and Biophysics , University of Madras , Chennai 600 025 , India
| | - Kamini NumbiRamudu
- Department of Biochemistry and Biotechnology , Council of Scientific and Industrial Research-Central Leather Research Institute (CSIR-CLRI) , Chennai 600 020 , India
| | | | | | | | - Krishnasamy Gunasekaran
- Department of Crystallography and Biophysics , University of Madras , Chennai 600 025 , India
| | - Chinju Govind
- Photosciences and Photonics Section, Chemical Sciences and Technology Division , CSIR-National Institute for Interdisciplinary Science and Technology , Thiruvananthapuram , 695 019 Kerala , India
| | - Venugopal Karunakaran
- Photosciences and Photonics Section, Chemical Sciences and Technology Division , CSIR-National Institute for Interdisciplinary Science and Technology , Thiruvananthapuram , 695 019 Kerala , India
| | - Niraikulam Ayyadurai
- Department of Biochemistry and Biotechnology , Council of Scientific and Industrial Research-Central Leather Research Institute (CSIR-CLRI) , Chennai 600 020 , India
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Mohankumar A, Devagi G, Shanmugam G, Nivitha S, Sundararaj P, Dallemer F, Kalaivani P, Prabhakaran R. Organoruthenium(II) complexes attenuate stress in Caenorhabditis elegans through regulating antioxidant machinery. Eur J Med Chem 2019; 168:123-133. [PMID: 30818174 DOI: 10.1016/j.ejmech.2019.02.029] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [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: 12/04/2018] [Revised: 02/07/2019] [Accepted: 02/09/2019] [Indexed: 11/28/2022]
Abstract
The 1:1 stoichiometric reactions of 3-methoxy salicylaldehyde-4(N)-substituted thiosemicarbazones (H2L1-4) with [RuCpCl(PPh3)2] was carried out in methanol. The obtained complexes (1-4) were characterized by analytical, IR, absorption and 1H NMR spectroscopic studies. The structures of ligand [H2-3MSal-etsc] (H2L3) and complex [RuCp(Msal-etsc) (PPh3)] (3), were characterized by single crystal X-ray diffraction studies. The interaction of the ruthenium(II) complexes (1-4) with calfthymus DNA (CT-DNA) has been explored by absorption and emission titration methods. Based on the observations, an intercalative binding mode of DNA has been proposed. The protein binding abilities of the new complexes were monitored by quenching the tryptophan and tyrosine residues of BSA, as model protein. From the studies, it was found that the new ruthenium metallacycles exhibited better affinity than their precursors. The free radical scavenging assay suggests that all complexes effectively scavenged the DPPH radicals as compared to that of standard control ascorbic acid and scavenging activities of complexes are in the order of 4 > 2 > 3 > 1. In addition, ruthenium(II) complexes (2-4) also exhibited an excellent in vivo antioxidant activity as it was able to increase the survival of worms exposed to lethal oxidative and thermal stresses possibly through reducing the intracellular ROS levels. It was interesting to note that complexes 2-4 failed to increase the lifespan of mev-1 mutant worms having shortened lifespan due to the over production of free radicals. This data confirmed that complexes 2-4 conferred stress resistance in C. elegans, but they also require an endogenous detoxification mechanism for doing so. The genetic and reporter gene expression analysis revealed that complexes 2-4 maintained the intracellular redox status and offered stress protection through transactivation of antioxidant defence machinery genes gst-4 and sod-3 which are directly regulated by SKN-1 and DAF-16 transcription factors, respectively. Altogether, our results suggested that complexes 2-4 might play a crucial role in stress modulation and they perhaps exert almost similar effects in higher models, which is an important issue to be validated in future.
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Affiliation(s)
- A Mohankumar
- Department of Zoology, Bharathiar University, Coimbatore, 641 046, Tamilnadu, India
| | - G Devagi
- Department of Chemistry, Bharathiar University, Coimbatore, 641 046, Tamilnadu, India
| | - G Shanmugam
- Department of Zoology, Bharathiar University, Coimbatore, 641 046, Tamilnadu, India
| | - S Nivitha
- College of Science, Northeastern University, Boston, MA, 02115, USA
| | - P Sundararaj
- Department of Zoology, Bharathiar University, Coimbatore, 641 046, Tamilnadu, India
| | - F Dallemer
- Laboratoire MADIREL CNRS UMR7246, Université of Aix-Marseille, Centre de Saint-Jérôme, bât. MADIREL, 13397, Marseille cedex 20, France
| | - P Kalaivani
- Department of Chemistry, Nirmala College for Women, Bharathiar University, Tamilnadu, Coimbatore, 641018, India.
| | - R Prabhakaran
- Department of Zoology, Bharathiar University, Coimbatore, 641 046, Tamilnadu, India.
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Karthick S, Thirupugalmani K, Kannan V, Shanmugam G, Krishnakumar M, Vinitha G, Sridhar B, Brahadeeswaran S. Synthesis, structural, spectral, third order nonlinear optical and quantum chemical investigations on hydrogen bonded novel organic molecular adduct 4-(dimethylamino)benzaldehyde 4-nitrophenol for opto-electronic applications. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.10.048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Murali DM, Shanmugam G. The aromaticity of the phenyl ring imparts thermal stability to a supramolecular hydrogel obtained from low molecular mass compound. NEW J CHEM 2019. [DOI: 10.1039/c9nj01781j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using Fmoc-phenylalanine and Fmoc-cyclohexylalanine, we show that the aromaticity of the phenyl ring imparts significant thermal stability to a supramolecular hydrogel system and its significance depends on the method of inducing hydrogelation.
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Affiliation(s)
- Dhanya Mahalakshmi Murali
- Organic & Bioorganic Chemistry Laboratory
- Council of Scientific and Industrial Research-Central Leather Research Institute (CSIR-CLRI)
- Chennai-600 020
- India
| | - Ganesh Shanmugam
- Organic & Bioorganic Chemistry Laboratory
- Council of Scientific and Industrial Research-Central Leather Research Institute (CSIR-CLRI)
- Chennai-600 020
- India
- Academy of Scientific and Innovative Research (AcSIR)
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Reddy SMM, Augustine G, Ayyadurai N, Shanmugam G. Biocytin-Based pH-Stimuli Responsive Supramolecular Multivariant Hydrogelator for Potential Applications. ACS Appl Bio Mater 2018; 1:1382-1388. [DOI: 10.1021/acsabm.8b00340] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Samala Murali Mohan Reddy
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR)-Central Leather Research Institute (CLRI), Adyar, Chennai 600020, India
- Academy of Scientific and Innovative Research (AcSIR), CLRI campus, Adyar, Chennai 600020, India
| | - George Augustine
- Biochemistry & Biotechnology Laboratory, CSIR, Adyar, Chennai 600020, India
| | | | - Ganesh Shanmugam
- Organic & Bioorganic Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR)-Central Leather Research Institute (CLRI), Adyar, Chennai 600020, India
- Academy of Scientific and Innovative Research (AcSIR), CLRI campus, Adyar, Chennai 600020, India
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Mohankumar A, Shanmugam G, Kalaiselvi D, Levenson C, Nivitha S, Thiruppathi G, Sundararaj P. East Indian sandalwood ( Santalum album L.) oil confers neuroprotection and geroprotection in Caenorhabditis elegans via activating SKN-1/Nrf2 signaling pathway. RSC Adv 2018; 8:33753-33774. [PMID: 30319772 PMCID: PMC6171454 DOI: 10.1039/c8ra05195j] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Accepted: 09/18/2018] [Indexed: 02/06/2023] Open
Abstract
East Indian Sandalwood Oil (EISO) has diverse beneficial effects and has been used for thousands of years in traditional folk-medicine for treatment of different human ailments. However, there has been no in-depth scientific investigation to decipher the neuroprotective and geroprotective mechanism of EISO and its principle components, α- and β-santalol. Hence the current study was undertaken to assess the protective effects of EISO, and α- and β-santalol against neurotoxic (6-OHDA/6-hydroxydopamine) and proteotoxic (α-synuclein) stresses in a Caenorhabditis elegans model. Initially, we found that EISO and its principle components exerted an excellent antioxidant and antiapoptotic activity as it was able to extend the lifespan, and inhibit the ROS generation, and germline cell apoptosis in 6-OHDA-intoxicated C. elegans. Further, we showed that supplementation of EISO, and α- and β-santalol reduced the 6-OHDA and α-synuclein-induced Parkinson's disease associated pathologies and improved the physiological functions. The genetic and reporter gene expression analysis revealed that an EISO, or α- and β-santalol-mediated protective effect does not appear to rely on DAF-2/DAF-16, but selectively regulates SKN-1 and its downstream targets involved in antioxidant defense and geroprotective processes. Together, our findings indicated that EISO and its principle components are worth exploring further as a candidate redox-based neuroprotectant for the prevention and management of age-related neurological disorders.
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Affiliation(s)
- A Mohankumar
- Unit of Nematology, Department of Zoology, Bharathiar University, Coimbatore, Tamilnadu-641046, India. ; ; ; Tel: +91-9943340405; Tel: +91-9677667720
| | - G Shanmugam
- Unit of Nematology, Department of Zoology, Bharathiar University, Coimbatore, Tamilnadu-641046, India. ; ; ; Tel: +91-9943340405; Tel: +91-9677667720
| | - D Kalaiselvi
- Unit of Nematology, Department of Zoology, Bharathiar University, Coimbatore, Tamilnadu-641046, India. ; ; ; Tel: +91-9943340405; Tel: +91-9677667720
| | - C Levenson
- Santalis Pharmaceuticals Inc., 18618 Tuscany Stone, Suite 100, San Antonio, Texas 78258, USA
| | - S Nivitha
- College of Science, Northeastern University, Boston, Massachusetts 02115, USA
| | - G Thiruppathi
- Unit of Nematology, Department of Zoology, Bharathiar University, Coimbatore, Tamilnadu-641046, India. ; ; ; Tel: +91-9943340405; Tel: +91-9677667720
| | - P Sundararaj
- Unit of Nematology, Department of Zoology, Bharathiar University, Coimbatore, Tamilnadu-641046, India. ; ; ; Tel: +91-9943340405; Tel: +91-9677667720
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Jayamani J, Naisini A, Madhan B, Shanmugam G. Ferulic acid, a natural phenolic compound, as a potential inhibitor for collagen fibril formation and its propagation. Int J Biol Macromol 2018; 113:277-284. [DOI: 10.1016/j.ijbiomac.2018.01.225] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 01/24/2018] [Accepted: 01/30/2018] [Indexed: 01/09/2023]
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Reddy RR, Shanmugam G, Madhan B, Phani Kumar BVN. Selective binding and dynamics of imidazole alkyl sulfate ionic liquids with human serum albumin and collagen – a detailed NMR investigation. Phys Chem Chem Phys 2018; 20:9256-9268. [DOI: 10.1039/c7cp08298c] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
STD NMR and selective spin-relaxation analysis evidenced the selective binding (anionic part) of imidazole alkyl sulfate ionic liquids with proteins (HSA and collagen). These studies also enabled the ionic liquids to be ranked based on their binding affinities with the proteins of study.
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Affiliation(s)
- R. Ravikanth Reddy
- NMR
- Inorganic & Physical Chemistry Laboratory
- CSIR–Central Leather Research Institute
- Chennai-600020
- India
| | - Ganesh Shanmugam
- Academy of Scientific and Innovative Research (AcSIR)
- CSIR–CLRI Campus
- Chennai-600020
- India
- Organic & Bioorganic Chemistry Laboratory
| | - Balaraman Madhan
- Academy of Scientific and Innovative Research (AcSIR)
- CSIR–CLRI Campus
- Chennai-600020
- India
- Centre for Academic and Research Excellence (CARE)
| | - B. V. N. Phani Kumar
- NMR
- Inorganic & Physical Chemistry Laboratory
- CSIR–Central Leather Research Institute
- Chennai-600020
- India
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Reddy SMM, Dorishetty P, Augustine G, Deshpande AP, Ayyadurai N, Shanmugam G. A Low-Molecular-Weight Gelator Composed of Pyrene and Fluorene Moieties for Effective Charge Transfer in Supramolecular Ambidextrous Gel. Langmuir 2017; 33:13504-13514. [PMID: 29135262 DOI: 10.1021/acs.langmuir.7b03453] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Charge-transfer (CT) gel materials obtained from low-molecular-weight (LMW) compounds through a supramolecular self-assembly approach have received fascinating attention by many researchers because of their interesting material property and potential applications. However, most of the CT gel materials constructed were of organogels while the construction of CT gels in the form of a hydrogel is a challenge because of the solubility issue in water, which considerably limits the use of CT hydrogels. Herein, for the first time, we report a new LMW gelator [Nα-(fluorenylmethoxycarbonyl)-Nε-(δ-butyric-1-pyrenyl)-l-lysine, (FmKPy)], composed of two functional moieties such as fluorenylmethoxycarbonyl and pyrene, which not only parade both hydro and organo (ambidextrous) supramolecular gel formation but also exhibit CT ambidextrous gels when mixed with an electron acceptor such as 2,4,7-trinitro-9-fluorenone (TNF). This finding is significant as the established CT organogelator in the literature did not form an organogel in the absence of an electron acceptor or lose their gelation property upon the addition of the acceptor. CT between pyrene and TNF was confirmed by the color change as well as the appearance of the CT band in the visible region of the absorption spectrum. CT between FmKPy and TNF was supported by the solvent dilution method using tetrahydrofuran as the gel breaker and pyrene fluorescence quenching in the case compound containing pyrene and TNF. The morphology of FmKPy ambidextrous gels indicates the fibrous nature while the self-assembled structure is primarily stabilized by π-π stacking among fluorenyl and pyrenyl moieties and hydrogen bonding between amide groups. The FmKPy-TNF CT ambidextrous gel retains the fibrous nature; however, the size of the fibers changed. In FmKPy-TNF CT gels, TNF is intercalated between pyrene moieties in the self-assembled structure as confirmed by fluorescence quenching and powder X-ray diffraction. The FmKPy ambidextrous gel exhibits significant properties such as low minimum gelation concentration (MGC), thixotropic nature, pH stimuli response, and high thermal stability. Upon the addition of TNF, the FmKPy-TNF CT ambidextrous gel maintains all these properties except MGC which increased for FmKPy-TNF. Because pyrene-based LMW organogels have been developed widely for many applications while their hydrogels were limited, the current finding of the pyrene-based ambidextrous fluorescent gel with the CT property provides a wide opportunity to use FmKPy as a soft material maker and also for potential applications in fields like surface coating, three-dimensional printing, and so forth.
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Affiliation(s)
- Samala Murali Mohan Reddy
- Academy of Scientific and Innovative Research (AcSIR) , CSIR-CLRI Campus, Adyar, Chennai 600020, India
| | - Pramod Dorishetty
- Department of Chemical Engineering, Indian Institute of Technology Madras , Adyar, Chennai 600036, India
| | | | - Abhijit P Deshpande
- Department of Chemical Engineering, Indian Institute of Technology Madras , Adyar, Chennai 600036, India
| | | | - Ganesh Shanmugam
- Academy of Scientific and Innovative Research (AcSIR) , CSIR-CLRI Campus, Adyar, Chennai 600020, India
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Gopinath A, Shanmugam G, Madhan B, Rao JR. Differential behavior of native and denatured collagen in the presence of alcoholic solvents: A gateway to instant structural analysis. Int J Biol Macromol 2017; 102:1156-1165. [DOI: 10.1016/j.ijbiomac.2017.04.121] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 04/19/2017] [Accepted: 04/22/2017] [Indexed: 11/30/2022]
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Jayamani J, Shanmugam G. Diameter of the vial plays a crucial role in the amyloid fibril formation: Role of interface area between hydrophilic-hydrophobic surfaces. Int J Biol Macromol 2017; 101:290-298. [DOI: 10.1016/j.ijbiomac.2017.03.070] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 03/03/2017] [Accepted: 03/14/2017] [Indexed: 12/29/2022]
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Devagi G, Shanmugam G, Mohankumar A, Sundararaj P, Dallemer F, Kalaivani P, Prabhakaran R. Caenorhabditis elegans as a model for exploring the efficacy of synthesized organoruthenium complexes for aging and Alzheimer's disease a neurodegenerative disorder: A systematic approach. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.03.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Marzouk M, Shanmugam G, Kalavrouziotis D, Mohammadi S. Ascending Aortic Replacement and Sutureless Valve in a Failed Stentless Aortic Prosthesis: A Bailout Option. Ann Thorac Surg 2017; 102:e507-e509. [PMID: 27847067 DOI: 10.1016/j.athoracsur.2016.05.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 03/08/2016] [Accepted: 05/03/2016] [Indexed: 11/19/2022]
Abstract
Aortic valve replacement with a Perceval sutureless bioprosthesis is a viable rescue option for a failed aortic stentless prosthesis. However, a dilated sinotubular junction and ascending aorta are reported as a contraindication for this technique. We describe an aortic sutureless valve implantation in a patient with a dilated ascending aorta and small aortic root after Dacron graft replacement of the ascending aorta in a failed aortic stentless bioprosthesis.
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Affiliation(s)
- Mohamed Marzouk
- Division of Cardiac Surgery, Quebec Heart and Lung University Institute, Laval University, Quebec City, Quebec, Canada
| | - Ganesh Shanmugam
- Division of Cardiac Surgery, Quebec Heart and Lung University Institute, Laval University, Quebec City, Quebec, Canada
| | - Dimitri Kalavrouziotis
- Division of Cardiac Surgery, Quebec Heart and Lung University Institute, Laval University, Quebec City, Quebec, Canada
| | - Siamak Mohammadi
- Division of Cardiac Surgery, Quebec Heart and Lung University Institute, Laval University, Quebec City, Quebec, Canada.
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Affiliation(s)
- Jayaraman Jayamani
- Bioorganic Chemistry Laboratory; CSIR-Central Leather Research Institute, Adyar; Chennai 600 020 India
- Academy of Scientific and Innovative Research (AcSIR), CSIR-CLRI Campus; Sardar Patel Road Chennai 600020 India
| | - Ganesh Shanmugam
- Bioorganic Chemistry Laboratory; CSIR-Central Leather Research Institute, Adyar; Chennai 600 020 India
- Academy of Scientific and Innovative Research (AcSIR), CSIR-CLRI Campus; Sardar Patel Road Chennai 600020 India
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Reddy SMM, Shanmugam G. Role of Intramolecular Aromatic π-π Interactions in the Self-Assembly of Di-l-Phenylalanine Dipeptide Driven by Intermolecular Interactions: Effect of Alanine Substitution. Chemphyschem 2016; 17:2897-907. [DOI: 10.1002/cphc.201600364] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 06/13/2016] [Indexed: 01/19/2023]
Affiliation(s)
- Samala Murali Mohan Reddy
- Bioorganic Chemistry Laboratory; Council of Scientific and Industrial Research (CSIR); Central Leather Research Institute (CLRI), Adyar; Chennai 600020 India), Fax: (+91) 44 24911589
- Academy of Scientific and Innovative Research (AcSIR); CSIR-CLRI Campus; Chennai 600020 India
| | - Ganesh Shanmugam
- Bioorganic Chemistry Laboratory; Council of Scientific and Industrial Research (CSIR); Central Leather Research Institute (CLRI), Adyar; Chennai 600020 India), Fax: (+91) 44 24911589
- Academy of Scientific and Innovative Research (AcSIR); CSIR-CLRI Campus; Chennai 600020 India
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Abstract
A 4 year-old boy with double outlet left ventricle, transposition of the great vessels, severe pulmonary and subpulmonary stenosis, and subaortic ventricular septal defect underwent successful surgical intervention. The surgical techniques and management plan for double-outlet left ventricle are reviewed.
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Affiliation(s)
- Ganesh Shanmugam
- Department of Cardiac Surgery, Royal Hospital for Sick Children, Scotland, UK
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