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Sunil A, Hernández Rico YG, Abioye RO, Reyes-Flores S, Pulatsu E, Udenigwe CC. Biofunctional Peptide Hydrogel: Self-Assembly, Rheological Properties, and In Vivo Antioxidant Activity of Ovalbumin-Derived Peptide (VLVNAIVFKGL). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2025; 73:5961-5969. [PMID: 40009729 DOI: 10.1021/acs.jafc.4c11287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2025]
Abstract
Ovalbumin-derived peptide, VLVNAIVFKGL, demonstrated self-assembling and gelation properties. However, the extent of self-assembly via solvent-switching and the bioactive potential of the ordered peptide aggregates is unknown. In silico analysis using AGGRESCAN, TANGO, ANuPP, and GAP predicted a high propensity to self-assemble into amyloid-like aggregates. Thioflavin T fluorescence assay confirmed enhanced self-assembly at low solvent concentrations (0.03-5% DMSO) and increasing peptide concentration (4-400 μM). Transmission electron microscopy showed enhanced formation of interconnected fibrillar networks at 400 μM. Mechanical properties assessed via rheology confirmed the hydrogelation of the fibrillar networks with high fibrillar stability in simulated gastrointestinal fluids. Oxidative stress assays using Caenorhabditis elegans showed a 21.48 ± 3.37% reduction in juglone-induced reactive oxygen species production by the hydrogel. In silico analysis further predicted the cell-penetrating and nontoxic characteristics of the peptide, highlighting the potential biocompatibility. Taken together, these findings support the development of VLVNAIVFKGL as an antioxidant peptide hydrogel for edible applications.
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Affiliation(s)
- Andria Sunil
- School of Nutrition Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
- Department of Chemistry, Indian Institute of Science Education and Research, Bhopal, Madhya Pradesh 462066, India
| | - Yessenia Guadalupe Hernández Rico
- School of Nutrition Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
- Nanotechnology Engineering Program, Faculty of Engineering, Universidad Autónoma de Querétaro, Santiago de Querétaro C.P. 76140, Mexico
| | - Raliat O Abioye
- School of Nutrition Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
- Department of Chemistry and Biomolecular Sciences, Faculty of Science, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Samanta Reyes-Flores
- School of Nutrition Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
- Department of Chemical, Food and Environmental Engineering, University of the Americas Puebla, San Andrés Cholula, Puebla 72810, Mexico
| | - Ezgi Pulatsu
- School of Nutrition Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
| | - Chibuike C Udenigwe
- School of Nutrition Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
- Department of Chemistry and Biomolecular Sciences, Faculty of Science, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
- University Research Chair in Food Properties and Nutrient Bioavailability, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
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Mastroeni P, Trezza A, Geminiani M, Frusciante L, Visibelli A, Santucci A. HGA Triggers SAA Aggregation and Accelerates Fibril Formation in the C20/A4 Alkaptonuria Cell Model. Cells 2024; 13:1501. [PMID: 39273071 PMCID: PMC11394027 DOI: 10.3390/cells13171501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2024] [Revised: 08/31/2024] [Accepted: 09/04/2024] [Indexed: 09/15/2024] Open
Abstract
Alkaptonuria (AKU) is a rare autosomal recessive metabolic disorder caused by mutations in the homogentisate 1,2-dioxygenase (HGD) gene, leading to the accumulation of homogentisic acid (HGA), causing severe inflammatory conditions. Recently, the presence of serum amyloid A (SAA) has been reported in AKU tissues, classifying AKU as novel secondary amyloidosis; AA amyloidosis is characterized by the extracellular tissue deposition of fibrils composed of fragments of SAA. AA amyloidosis may complicate several chronic inflammatory conditions, like rheumatoid arthritis, ankylosing spondylitis, inflammatory bowel disease, chronic infections, neoplasms, etc. Treatments of AA amyloidosis relieve inflammatory disorders by reducing SAA concentrations; however, no definitive therapy is currently available. SAA regulation is a crucial step to improve AA secondary amyloidosis treatments. Here, applying a comprehensive in vitro and in silico approach, we provided evidence that HGA is a disruptor modulator of SAA, able to enhance its polymerization, fibril formation, and aggregation upon SAA/SAP colocalization. In silico studies deeply dissected the SAA misfolding molecular pathway and SAA/HGA binding, suggesting novel molecular insights about it. Our results could represent an important starting point for identifying novel therapeutic strategies in AKU and AA secondary amyloidosis-related diseases.
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Affiliation(s)
- Pierfrancesco Mastroeni
- ONE-HEALTH Lab, Department of Biotechnology, Chemistry and Pharmacy, University of Siena Via Aldo Moro, 53100 Siena, Italy; (P.M.); (A.T.); (L.F.); (A.V.); (A.S.)
| | - Alfonso Trezza
- ONE-HEALTH Lab, Department of Biotechnology, Chemistry and Pharmacy, University of Siena Via Aldo Moro, 53100 Siena, Italy; (P.M.); (A.T.); (L.F.); (A.V.); (A.S.)
| | - Michela Geminiani
- ONE-HEALTH Lab, Department of Biotechnology, Chemistry and Pharmacy, University of Siena Via Aldo Moro, 53100 Siena, Italy; (P.M.); (A.T.); (L.F.); (A.V.); (A.S.)
| | - Luisa Frusciante
- ONE-HEALTH Lab, Department of Biotechnology, Chemistry and Pharmacy, University of Siena Via Aldo Moro, 53100 Siena, Italy; (P.M.); (A.T.); (L.F.); (A.V.); (A.S.)
| | - Anna Visibelli
- ONE-HEALTH Lab, Department of Biotechnology, Chemistry and Pharmacy, University of Siena Via Aldo Moro, 53100 Siena, Italy; (P.M.); (A.T.); (L.F.); (A.V.); (A.S.)
| | - Annalisa Santucci
- ONE-HEALTH Lab, Department of Biotechnology, Chemistry and Pharmacy, University of Siena Via Aldo Moro, 53100 Siena, Italy; (P.M.); (A.T.); (L.F.); (A.V.); (A.S.)
- MetabERN, Department of Biotechnology, Chemistry and Pharmacy, University of Siena Via Aldo Moro, 53100 Siena, Italy
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Cheng L, De Leon-Rodriguez LM, Gilbert EP, Loo T, Petters L, Yang Z. Self-assembly and hydrogelation of a potential bioactive peptide derived from quinoa proteins. Int J Biol Macromol 2024; 259:129296. [PMID: 38199549 DOI: 10.1016/j.ijbiomac.2024.129296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 12/25/2023] [Accepted: 01/05/2024] [Indexed: 01/12/2024]
Abstract
In this work the identification of peptides derived from quinoa proteins which could potentially self-assemble, and form hydrogels was carried out with TANGO, a statistical mechanical based algorithm that predicts β-aggregate propensity of peptides. Peptides with the highest aggregate propensity were subjected to gelling screening experiments from which the most promising bioactive peptide with sequence KIVLDSDDPLFGGF was selected. The self-assembling and hydrogelation properties of the C-terminal amidated peptide (KIVLDSDDPLFGGF-NH2) were studied. The effect of concentration, pH, and temperature on the secondary structure of the peptide were probed by circular dichroism (CD), while its nanostructure was studied by transmission electron microscopy (TEM) and small-angle neutron scattering (SANS). Results revealed the existence of random coil, α-helix, twisted β-sheet, and well-defined β-sheet secondary structures, with a range of nanostructures including elongated fibrils and bundles, whose proportion was dependant on the peptide concentration, pH, or temperature. The self-assembly of the peptide is demonstrated to follow established models of amyloid formation, which describe the unfolded peptide transiting from an α-helix-containing intermediate into β-sheet-rich protofibrils. The self-assembly is promoted at high concentrations, elevated temperatures, and pH values close to the peptide isoelectric point, and presumably mediated by hydrogen bond, hydrophobic and electrostatic interactions, and π-π interactions (from the F residue). At 15 mg/mL and pH 3.5, the peptide self-assembled and formed a self-supporting hydrogel exhibiting viscoelastic behaviour with G' (1 Hz) ~2300 Pa as determined by oscillatory rheology measurements. The study describes a straightforward method to monitor the self-assembly of plant protein derived peptides; further studies are needed to demonstrate the potential application of the formed hydrogels in food and biomedicine.
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Affiliation(s)
- Lirong Cheng
- Riddet Institute, Massey University, Palmerston North 4442, New Zealand
| | | | - Elliot Paul Gilbert
- Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee, NSW, Australia; Centre for Nutrition and Food Sciences, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Trevor Loo
- BioProtection Aotearoa, School of Natural Sciences, Massey University, Palmerston North 4442, New Zealand
| | - Ludwig Petters
- School of Natural Sciences, Massey University, Palmerston North 4442, New Zealand
| | - Zhi Yang
- School of Food and Advanced Technology, Massey University, Auckland 0632, New Zealand.
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Horgan NG, Moore KBE, Fortin JS. Investigation of serum amyloid a within animal species focusing on the 1-25 amino acid region. Vet Q 2023; 43:1-8. [PMID: 37800590 PMCID: PMC10614707 DOI: 10.1080/01652176.2023.2267605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 10/03/2023] [Indexed: 10/07/2023] Open
Abstract
AA amyloidosis, characterized by the misfolding of serum amyloid A (SAA) protein, is the most common amyloid protein disorder across multiple species. SAA is a positive-acute phase protein synthesized by the liver in response to inflammation or stress, and it normally associates with high-density lipoprotein at its N-terminus. In this study, we focused on the 1-25 amino acid (aa) region of the complete 104 aa SAA sequence to examine the aggregation propensity of AA amyloid. A library comprising eight peptides from different species was assembled for analysis. To access the aggregation propensity of each peptide region, a bioinformatic study was conducted using the algorithm TANGO. Congo red (CR) binding assays, Thioflavin T (ThT) assays, and transmission electron microscopy (TEM) were utilized to evaluate whether the synthesized peptides formed amyloid-like fibrils. All synthetic SAA 1-25 congeners resulted in amyloid-like fibrils formation (per CR and/or ThT staining and TEM detection) at the exception of the ferret SAA1-25 fragment, which generated plaque-like materials by TEM. Ten residues were preserved among SAA 1-25 congeners resulting in amyloid-like fibrils, i.e. F6, E9, A10, G13, D16, M17, A20, Y21, D23, and M24. Amino acid residues highlighted by this study may have a role in increasing the propensity for amyloid-like fibril formation. This study put an emphasis on region 1-25 in the mechanism of SAA1 misfolding.
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Affiliation(s)
- Natalie G. Horgan
- Department of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, IN, USA
| | - Kendall B. E. Moore
- Department of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, IN, USA
| | - Jessica S. Fortin
- Department of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, IN, USA
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Abstract
ADAM 17, a disintegrin and metalloproteinase 17 belonging to the adamalysin protein family, is a Zn2+-dependent type-I transmembrane α-secretase protein. As a major sheddase, ADAM 17 acts as an indispensable regulator of chief cellular events and controls diverse cytokines, adhesion molecules, and growth factors. The signal peptide (residues 1-17) of ADAM 17 targets the protein to the secretory pathway and gets cleaved off afterward. No other function is documented for the ADAM 17 signal peptide (ADAM 17-SP) inside the cells. Here, we have taken a reductionist approach to understand the biophysical properties of ADAM 17-SP. Aiming to understand the possibility of aggregation, we found several aggregation-prone segments in the signal peptide. We performed in vitro experiments to show that the signal peptide forms amyloid-like aggregates in buffered conditions. We also studied its aggregation in the presence of sodium tripolyphosphate and heparin to correlate with the cellular conditions, as these biomolecules are naturally present inside cells. Further, we performed seeding experiments to observe the possibility of ADAM 17-SP aggregate interaction with the Aβ42 peptide. The results suggest that its seeds escalate the aggregation kinetics of the Aβ42 peptide and form heteromeric aggregates with it. We believe this finding could further intensify the aggregation studies on other signal peptides and shed light on the potential role of these segments other than signaling.
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Affiliation(s)
- Taniya Bhardwaj
- School of Biosciences and Bioengineering, Indian Institute of Technology Mandi, VPO Kamand, Mandi, Himachal Pradesh 175075, India
| | - Rajanish Giri
- School of Biosciences and Bioengineering, Indian Institute of Technology Mandi, VPO Kamand, Mandi, Himachal Pradesh 175075, India
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