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Florio D, Annunziata A, Panzetta V, Netti PA, Ruffo F, Marasco D. η 6-Arene Ru(II) Complexes as Modulators of Amyloid Aggregation. Inorg Chem 2024. [PMID: 39129368 DOI: 10.1021/acs.inorgchem.4c02456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/13/2024]
Abstract
Inorganic medicinal compounds represent a unique and versatile source of potential therapeutics in many diseases and, more recently, in neurodegeneration. Herein we investigated the effects of two η6-arene Ru(II) complexes on the self-aggregation processes of several amyloidogenic peptides endowed with different kinetics and primary sequences. The Ru(II) complexes exhibit, around the metal ion, two chlorides, one NHC = N-heterocyclic carbene, with a glucosyl and a methyl substituent and separately a hexamethylbenzene, which is named Ru1, and one benzene, named Ru2. Both complexes were demonstrated to bind monomeric amyloids suppressing aggregation as evidenced in thioflavin T (ThT) binding assays and autofluorescence experiments. Electrospray ionization mass spectrometry (ESI-MS) indicated the formation of direct adducts between amyloid and metal complexes, which determined the marked conformational variation of peptides and a rescue of cellular viability in SH-SY5Y cells. The complex Ru2 was demonstrated to be a more potent inhibitor of amyloid aggregation compared to Ru1 likely because of the less hindrance of the arene moiety. The presented data strongly support the in vitro ability of η6-arene Ru(II) complexes to suppress amyloid aggregation, providing insights into their potential application as novel therapeutics in neurodegenerative diseases.
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Affiliation(s)
- Daniele Florio
- Department of Pharmacy, University of Naples Federico II, 80131 Naples, Italy
| | - Alfonso Annunziata
- Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy
- Department of Chemical, Materials, and Industrial Production Engineering (DICMaPI), University of Naples Federico II, 80125 Naples, Italy
| | - Valeria Panzetta
- Department of Chemical, Materials, and Industrial Production Engineering (DICMaPI), University of Naples Federico II, 80125 Naples, Italy
- Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples Federico II, Istituto Italiano di Tecnologia, 80125 Naples, Italy
| | - Paolo A Netti
- Department of Chemical, Materials, and Industrial Production Engineering (DICMaPI), University of Naples Federico II, 80125 Naples, Italy
- Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples Federico II, Istituto Italiano di Tecnologia, 80125 Naples, Italy
| | - Francesco Ruffo
- Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy
| | - Daniela Marasco
- Department of Pharmacy, University of Naples Federico II, 80131 Naples, Italy
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2
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La Manna S, Panzetta V, Di Natale C, Cipollone I, Monti M, Netti PA, Terán A, Sánchez-Peláez AE, Herrero S, Merlino A, Marasco D. Comparative Analysis of the Inhibitory Mechanism of Aβ 1-42 Aggregation by Diruthenium Complexes. Inorg Chem 2024; 63:10001-10010. [PMID: 38742626 DOI: 10.1021/acs.inorgchem.4c01218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
There is a growing interest in the search for metal-based therapeutics for protein misfolding disorders such as Alzheimer's disease (AD). A novel and largely unexplored class of metallodrugs is constituted by paddlewheel diruthenium complexes, which exhibit unusual water solubility and stability and unique coordination modes to proteins. Here, we investigate the ability of the complexes [Ru2Cl(DPhF)(O2CCH3)3]·H2O (1), [Ru2Cl(DPhF)2(O2CCH3)2]·H2O (2), and K2[Ru2(DPhF)(CO3)3]·3H2O (3) (DPhF- = N,N'-diphenylformamidinate) to interfere with the amyloid aggregation of the Aβ1-42 peptide. These compounds differ in charge and steric hindrance due to the coordination of a different number of bulky ligands. The mechanisms of action of the three complexes were studied by employing a plethora of physicochemical and biophysical techniques as well as cellular assays. All these studies converge on different mechanisms of inhibition of amyloid fibrillation: complexes 1 and 2 show a clear inhibitory effect due to an exchange ligand process in the Ru2 unit aided by aromatic interactions. Complex 3 shows no inhibition of aggregation, probably due to its negative charge in solution. This study demonstrates that slight variations in the ligands surrounding the bimetallic core can modulate the amyloid aggregation inhibition and supports the use of paddlewheel diruthenium complexes as promising therapeutics for Alzheimer's disease.
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Affiliation(s)
- Sara La Manna
- Department of Pharmacy, University of Naples "Federico II", Naples 80131, Italy
| | - Valeria Panzetta
- Department of Chemical, Materials, and Industrial Production Engineering (DICMaPI), University of Naples Federico II, Naples 80125, Italy
- Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples Federico II, Istituto Italiano di Tecnologia, Naples 80125, Italy
| | - Concetta Di Natale
- Department of Chemical, Materials, and Industrial Production Engineering (DICMaPI), University of Naples Federico II, Naples 80125, Italy
| | - Irene Cipollone
- Department of Chemical Sciences, University of Naples "Federico II", Naples 80126, Italy
- CEINGE Biotecnologie Avanzate "Franco Salvatore" S.c.a r.l., Naples 80131, Italy
| | - Maria Monti
- Department of Chemical Sciences, University of Naples "Federico II", Naples 80126, Italy
- CEINGE Biotecnologie Avanzate "Franco Salvatore" S.c.a r.l., Naples 80131, Italy
| | - Paolo A Netti
- Department of Chemical, Materials, and Industrial Production Engineering (DICMaPI), University of Naples Federico II, Naples 80125, Italy
- Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples Federico II, Istituto Italiano di Tecnologia, Naples 80125, Italy
| | - Aarón Terán
- MatMoPol Research Group, Department of Inorganic Chemistry, Faculty of Chemical Science, Complutense University of Madrid, Avenida Complutense s/n, Madrid 28040, Spain
- MUSICHEM Research Group, Department of Physics "E. Pancini", University of Naples Federico II, Complesso Universitario di Monte Sant'Angelo, Via Cinthia, 21, Naples 80126, Italy
| | - Ana E Sánchez-Peláez
- MatMoPol Research Group, Department of Inorganic Chemistry, Faculty of Chemical Science, Complutense University of Madrid, Avenida Complutense s/n, Madrid 28040, Spain
| | - Santiago Herrero
- MatMoPol Research Group, Department of Inorganic Chemistry, Faculty of Chemical Science, Complutense University of Madrid, Avenida Complutense s/n, Madrid 28040, Spain
| | - Antonello Merlino
- Department of Chemical Sciences, University of Naples "Federico II", Naples 80126, Italy
| | - Daniela Marasco
- Department of Pharmacy, University of Naples "Federico II", Naples 80131, Italy
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3
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Masroor A, Zaidi N, Nabi F, Malik S, Zehra S, Arjmand F, Naseem N, Khan RH. Biophysical insight into anti-amyloidogenic nature of novel ionic Co(II)(phen)(H 2O) 4] +[glycinate] - chemotherapeutic drug candidate against human lysozyme aggregation. Biophys Chem 2024; 308:107214. [PMID: 38428228 DOI: 10.1016/j.bpc.2024.107214] [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: 11/21/2023] [Revised: 02/10/2024] [Accepted: 02/25/2024] [Indexed: 03/03/2024]
Abstract
In the recent past, there has been an ever-increasing interest in the search for metal-based therapeutic drug candidates for protein misfolding disorders (PMDs) particularly neurodegenerative disorders such as Alzheimer's, Parkinson's, Prion's diseases, and amyotrophic lateral sclerosis. Also, different amyloidogenic variants of human lysozyme (HL) are involved in hereditary systemic amyloidosis. Metallo-therapeutic agents are extensively studied as antitumor agents, however, they are relatively unexplored for the treatment of non-neuropathic amyloidoses. In this work, inhibition potential of a novel ionic cobalt(II) therapeutic agent (CoTA) of the formulation [Co(phen)(H2O)4]+[glycinate]- is evaluated against HL fibrillation. Various biophysical techniques viz., dye-binding assays, dynamic light scattering (DLS), differential scanning calorimetry (DSC), electron microscopy, and molecular docking experiments validate the proposed mechanism of inhibition of HL fibrillation by CoTA. The experimental corroborative results of these studies reveal that CoTA can suppress and slow down HL fibrillation at physiological temperature and pH. DLS and 1-anilino-8-naphthalenesulfonate (ANS) assay show that reduced fibrillation in the presence of CoTA is marked by a significant decrease in the size and hydrophobicity of the aggregates. Fluorescence quenching and molecular docking results demonstrate that CoTA binds moderately to the aggregation-prone region of HL (Kb = 6.6 × 104 M-1), thereby, inhibiting HL fibrillation. In addition, far-UV CD and DSC show that binding of CoTA to HL does not cause any change in the stability of HL. More importantly, CoTA attenuates membrane damaging effects of HL aggregates against RBCs. This study identifies inorganic metal complexes as a therapeutic intervention for systemic amyloidosis.
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Affiliation(s)
- Aiman Masroor
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, U.P 202002, India
| | - Nida Zaidi
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, U.P 202002, India
| | - Faisal Nabi
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, U.P 202002, India
| | - Sadia Malik
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, U.P 202002, India
| | - Siffeen Zehra
- Department of Chemistry, Aligarh Muslim University, Aligarh, U.P 202002, India
| | - Farukh Arjmand
- Department of Chemistry, Aligarh Muslim University, Aligarh, U.P 202002, India
| | - Nida Naseem
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, U.P 202002, India
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, U.P 202002, India.
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4
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Florio D, Marasco D. Could Targeting NPM1c+ Misfolding Be a Promising Strategy for Combating Acute Myeloid Leukemia? Int J Mol Sci 2024; 25:811. [PMID: 38255885 PMCID: PMC10815591 DOI: 10.3390/ijms25020811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 12/30/2023] [Accepted: 01/06/2024] [Indexed: 01/24/2024] Open
Abstract
Acute myeloid leukemia (AML) is a heterogeneous group of diseases classified into various types on the basis of distinct features concerning the morphology, cytochemistry and cytogenesis of leukemic cells. Among the different subtypes, the group "AML with gene mutations" includes the variations of the gene of the multifunctional protein nucleophosmin 1 (NPM1). These mutations are the most frequent (~30-35% of AML adult patients and less in pediatric ones) and occur predominantly in the C-terminal domain (CTD) of NPM1. The most important mutation is the insertion at W288, which determines the frame shift W288Cfs12/Ffs12/Lfs*12 and leads to the addition of 2-12 amino acids, which hamper the correct folding of NPM1. This mutation leads to the loss of the nuclear localization signal (NoLS) and to aberrant cytoplasmic localization, denoted as NPM1c+. Many investigations demonstrated that interfering with the cellular location and oligomerization status of NPM1 can influence its biological functions, including the proper buildup of the nucleolus, and therapeutic strategies have been proposed to target NPM1c+, particularly the use of drugs able to re-direct NPM1 localization. Our studies unveiled a direct link between AML mutations and the neat amyloidogenic character of the CTDs of NPM1c+. Herein, with the aim of exploiting these conformational features, novel therapeutic strategies are proposed that rely on the induction of the selective self-cytotoxicity of leukemic blasts by focusing on agents such as peptides, peptoids or small molecules able to enhance amyloid aggregation and targeting selectively AML-NPM1c+ mutations.
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Affiliation(s)
| | - Daniela Marasco
- Department of Pharmacy, University of Naples “Federico II”, 80131 Naples, Italy;
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5
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La Manna S, Di Natale C, Panzetta V, Leone M, Mercurio FA, Cipollone I, Monti M, Netti PA, Ferraro G, Terán A, Sánchez-Peláez AE, Herrero S, Merlino A, Marasco D. A Diruthenium Metallodrug as a Potent Inhibitor of Amyloid-β Aggregation: Synergism of Mechanisms of Action. Inorg Chem 2024; 63:564-575. [PMID: 38117944 PMCID: PMC10777406 DOI: 10.1021/acs.inorgchem.3c03441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 11/29/2023] [Accepted: 11/29/2023] [Indexed: 12/22/2023]
Abstract
The physical and chemical properties of paddlewheel diruthenium compounds are highly dependent on the nature of the ligands surrounding the bimetallic core. Herein, we compare the ability of two diruthenium compounds, [Ru2Cl(D-p-FPhF)(O2CCH3)3]·H2O (1) (D-p-FPhF- = N,N'-bis(4-fluorophenyl)formamidinate) and K3[Ru2(O2CO)4]·3H2O (2), to act as inhibitors of amyloid aggregation of the Aβ1-42 peptide and its peculiar fragments, Aβ1-16 and Aβ21-40. A wide range of biophysical techniques has been used to determine the inhibition capacity against aggregation and the possible mechanism of action of these compounds (Thioflavin T fluorescence and autofluorescence assays, UV-vis absorption spectroscopy, circular dichroism, nuclear magnetic resonance, mass spectrometry, and electron scanning microscopy). Data show that the most effective inhibitory effect is shown for compound 1. This compound inhibits fiber formation and completely abolishes the cytotoxicity of Aβ1-42. The antiaggregatory capacity of this complex can be explained by a binding mechanism of the dimetallic units to the peptide chain along with π-π interactions between the formamidinate ligand and the aromatic side chains. The results suggest the potential use of paddlewheel diruthenium complexes as neurodrugs and confirm the importance of the steric and charge effects on the properties of diruthenium compounds.
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Affiliation(s)
- Sara La Manna
- Department
of Pharmacy, University of Naples “Federico
II”, 80131 Naples, Italy
| | - Concetta Di Natale
- Department
of Chemical, Materials, and Industrial Production Engineering (DICMaPI), University of Naples Federico II, 80125 Naples, Italy
| | - Valeria Panzetta
- Department
of Chemical, Materials, and Industrial Production Engineering (DICMaPI), University of Naples Federico II, 80125 Naples, Italy
- Interdisciplinary
Research Centre on Biomaterials (CRIB), University of Naples Federico II, Istituto Italiano di Tecnologia, 80125 Naples, Italy
| | - Marilisa Leone
- Institute
of Biostructures and Bioimaging - CNR, 80145 Naples, Italy
| | | | - Irene Cipollone
- Department
of Chemical Sciences, University of Naples
“Federico II”, 80126 Naples, Italy
- CEINGE
Biotecnologie
Avanzate “Franco Salvatore” S.c.a r.l., 80131 Naples, Italy
| | - Maria Monti
- Department
of Chemical Sciences, University of Naples
“Federico II”, 80126 Naples, Italy
- CEINGE
Biotecnologie
Avanzate “Franco Salvatore” S.c.a r.l., 80131 Naples, Italy
| | - Paolo A. Netti
- Department
of Chemical, Materials, and Industrial Production Engineering (DICMaPI), University of Naples Federico II, 80125 Naples, Italy
- Interdisciplinary
Research Centre on Biomaterials (CRIB), University of Naples Federico II, Istituto Italiano di Tecnologia, 80125 Naples, Italy
| | - Giarita Ferraro
- Department
of Chemical Sciences, University of Naples
“Federico II”, 80126 Naples, Italy
| | - Aarón Terán
- MatMoPol
Research Group, Department of Inorganic Chemistry, Faculty of Chemical
Science, Complutense University of Madrid, Avenida Complutense s/n, 28040 Madrid, Spain
| | - Ana E. Sánchez-Peláez
- MatMoPol
Research Group, Department of Inorganic Chemistry, Faculty of Chemical
Science, Complutense University of Madrid, Avenida Complutense s/n, 28040 Madrid, Spain
| | - Santiago Herrero
- MatMoPol
Research Group, Department of Inorganic Chemistry, Faculty of Chemical
Science, Complutense University of Madrid, Avenida Complutense s/n, 28040 Madrid, Spain
| | - Antonello Merlino
- Department
of Chemical Sciences, University of Naples
“Federico II”, 80126 Naples, Italy
| | - Daniela Marasco
- Department
of Pharmacy, University of Naples “Federico
II”, 80131 Naples, Italy
- Institute
of Biostructures and Bioimaging - CNR, 80145 Naples, Italy
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6
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La Manna S, Roviello V, Monaco V, Platts JA, Monti M, Gabano E, Ravera M, Marasco D. The inhibitory effects of platinum(II) complexes on amyloid aggregation: a theoretical and experimental approach. Dalton Trans 2023; 52:12677-12685. [PMID: 37655459 DOI: 10.1039/d3dt02187d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Platinum (Pt)(II) square planar complexes are well-known anticancer drugs whose Mechanism of Action (MOA) are finely tuned by the polar, hydrophobic and aromatic features of the ligands. In the attempt to translate this tunability to the identification of potential neurodrugs, herein, four Pt(II) complexes were investigated in their ability to modulate the self-aggregation processes of two amyloidogenic models: Sup35p7-13 and NPM1264-277 peptides. In particular, phenanthriplatin revealed the most efficient agent in the modulation of amyloid aggregation: through several biophysical assays, as Thioflavin T (ThT), electrospray ionization mass spectrometry (ESI-MS) and ultraviolet-visible (UV-vis) absorption spectroscopy, this complex revealed able to markedly suppress aggregation and to disassemble small soluble aggregates. This effect was due to a direct coordination of phenanthriplatin to the amyloid, with the loss of several ligands and different stoichiometries, by the formation of π-π and π-cation interactions as indicated from molecular dynamic simulations. Presented data support a growing and recent approach concerning the repurposing of metallodrugs as potential novel neurotherapeutics.
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Affiliation(s)
- Sara La Manna
- Department of Pharmacy, University of Naples Federico II, 80131, Naples, Italy.
| | - Valentina Roviello
- Department of Chemical, Materials, and Industrial Production Engineering (DICMaPI), University of Naples Federico II, 80125 Naples, Italy
| | - Vittoria Monaco
- Department of Chemical Sciences, University of Naples Federico II, 80126, Naples, Italy
- CEINGE Biotecnologie Avanzate "Franco Salvatore" S.c.a r.l., 80131, Naples, Italy
| | - James A Platts
- School of Chemistry, Cardiff University, Park Place, Cardiff, CF10 3AT, UK
| | - Maria Monti
- Department of Chemical Sciences, University of Naples Federico II, 80126, Naples, Italy
- CEINGE Biotecnologie Avanzate "Franco Salvatore" S.c.a r.l., 80131, Naples, Italy
| | - Elisabetta Gabano
- Dipartimento per lo Sviluppo Sostenibile e la Transizione Ecologica, University of Piemonte Orientale, Piazza S. Eusebio 5, 13100, Vercelli, Italy
| | - Mauro Ravera
- Department of Sciences and Technological Innovation, University of Piemonte Orientale, Viale Michel 11, 15121 Alessandria, Italy
| | - Daniela Marasco
- Department of Pharmacy, University of Naples Federico II, 80131, Naples, Italy.
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7
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Singh S, Navale GR, Agrawal S, Singh HK, Singla L, Sarkar D, Sarma M, Choudhury AR, Ghosh K. Design and synthesis of ruthenium complexes and their studies on the inhibition of amyloid β (1-42) peptide aggregation. Int J Biol Macromol 2023; 239:124197. [PMID: 36972817 DOI: 10.1016/j.ijbiomac.2023.124197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 03/07/2023] [Accepted: 03/23/2023] [Indexed: 03/29/2023]
Abstract
Misfolding and protein aggregation have been linked to numerous human neurodegenerative disorders such as Alzheimer's, prions, and Parkinson's. Due to their interesting photophysical properties, ruthenium (Ru) complexes have received considerable attention in studying protein aggregation. In this study, we synthesized the novel Ru complexes ([Ru(p-cymene)Cl(L-1)][PF6](Ru-1), and [Ru(p-cymene)Cl(L-2)][PF6](Ru-2)) and investigated their inhibitory activity against the bovine serum albumin (BSA) aggregation and the Aβ1-42 peptides amyloid formation. Several spectroscopic methods were used to characterize the complexes, and the molecular structure was determined by X-ray crystallography. Amyloid aggregation and inhibition activity were examined using the Thioflavin-T (ThT) assay, and secondary structures were analyzed by circular dichroism (CD) spectroscopy and transmission electron microscopy (TEM). The cell viability assay was carried out on the neuroblastoma cell line, revealing that the Ru-2 complex showed better protective effects against Aβ1-42 peptide toxicity on neuro-2a cells than the Ru-1 complex. Molecular docking studies elucidate binding sites and interactions between the Ru-complexes and the Aβ1-42 fibrils. The experimental studies revealed that these complexes significantly inhibited BSA aggregation and Aβ1-42 amyloid fibril formation at 1:3 and 1:1 equimolar concentrations, respectively. Antioxidant assays demonstrated that these complexes act as antioxidants, protecting from amyloid-induced oxidative stress. Molecular docking studies with the monomeric Aβ1-42 (PDB: 1IYT) show hydrophobic interaction, and both complexes bind preferably in the central region of the peptide and coordinate with two binding sites of the peptide. Hence, we suggest that the Ru-based complexes could be applied as a potential agent in metallopharmaceutical research against Alzheimer's disease.
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Affiliation(s)
- Sain Singh
- Department of Chemistry, Indian Institute of Technology, Roorkee 247667, India
| | - Govinda R Navale
- Department of Chemistry, Indian Institute of Technology, Roorkee 247667, India
| | - Sonia Agrawal
- Department of Organic Chemistry, CSIR-National Chemical Laboratory, Pune 411 008, India
| | - Haobam Kisan Singh
- Department of Chemistry, Indian Institute of Technology, Guwahati 781039, India
| | - Labhini Singla
- Department of Chemical Sciences, Indian Institute of Science Education and Research, Mohali, India
| | - Dhiman Sarkar
- Department of Organic Chemistry, CSIR-National Chemical Laboratory, Pune 411 008, India
| | - Manabendra Sarma
- Department of Chemistry, Indian Institute of Technology, Guwahati 781039, India
| | - Anghuman Roy Choudhury
- Department of Chemical Sciences, Indian Institute of Science Education and Research, Mohali, India
| | - Kaushik Ghosh
- Department of Chemistry, Indian Institute of Technology, Roorkee 247667, India; Department of Biosciences and Bioengineering, Indian Institute of Technology, Roorkee 247667, India.
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8
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Zhou C, Zhang J, Luo X, Lian F, Zeng Y, Zhang Z, Zhang H, Zhang N. Sodium Oligomannate Electrostatically Binds to Aβ and Blocks Its Aggregation. J Phys Chem B 2023; 127:1983-1994. [PMID: 36848623 DOI: 10.1021/acs.jpcb.3c00280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
GV-971 (sodium oligomannate) is a China Food and Drug Administration (CFDA)-approved drug for treating Alzheimer's disease, and it could inhibit Aβ fibril formation in vitro and in mouse studies. To elucidate the mechanisms for understanding how GV-971 modulates Aβ's aggregation, we conducted a systematic biochemical and biophysical study of Aβ40/Aβ42:GV-971 systems. The integrating analysis of previously published data and our results suggests that the multisite electrostatic interactions between GV-971's carboxylic groups and Aβ40/Aβ42's three histidine residues might play a dominant role in driving the binding of GV-971 to Aβ. The fuzzy-type electrostatic interactions between GV-971 and Aβ are expected to protect Aβ from aggregation potentially through breaking the histidine-mediated inter-Aβ electrostatic interactions. Meanwhile, since GV-971's binding exhibited a slight downregulation effect on the flexibility of Aβ's histidine-colonized fragment, which potentially favors Aβ aggregation, we conclude that the dynamics alteration plays a minor role in GV-971's modulation on Aβ aggregation.
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Affiliation(s)
- Chen Zhou
- Analytical Research Center for Organic and Biological Molecules, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China
| | - Jingjing Zhang
- Center for Neurological and Psychiatric Research and Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.,State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Xinwen Luo
- Analytical Research Center for Organic and Biological Molecules, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China.,University of the Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Fulin Lian
- Analytical Research Center for Organic and Biological Molecules, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China
| | - Yangyang Zeng
- Green Valley (Shanghai) Pharmaceuticals Co., Ltd., Shanghai 201203, China
| | - Zhenqing Zhang
- School of Pharmaceutical Science, Soochow University, Suzhou 215123, Jiangsu, China
| | - Haiyan Zhang
- Center for Neurological and Psychiatric Research and Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.,State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Naixia Zhang
- Analytical Research Center for Organic and Biological Molecules, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China.,University of the Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
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9
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Nguyen YT, Kim N, Lee HJ. Metal Complexes as Promising Matrix Metalloproteinases Regulators. Int J Mol Sci 2023; 24:ijms24021258. [PMID: 36674771 PMCID: PMC9861486 DOI: 10.3390/ijms24021258] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/05/2023] [Accepted: 01/06/2023] [Indexed: 01/11/2023] Open
Abstract
Nowadays, cancers and dementia, such as Alzheimer's disease, are the most fatal causes of death. Many studies tried to understand the pathogenesis of those diseases clearly and develop a promising way to treat the diseases. Matrix metalloproteinases (MMPs) have been reported to be involved in the pathology of cancers and AD through tumor cell movement and amyloid degradation. Therefore, control of the levels and actions of MMPs, especially MMP-2 and MMP-9, is necessary to care for and/or cure cancer and AD. Various molecules have been examined for their potential application as regulators of MMPs expression and activity. Among the molecules, multiple metal complexes have shown advantages, including simple synthesis, less toxicity and specificity toward MMPs in cancer cells or in the brain. In this review, we summarize the recent studies and knowledge of metal complexes (e.g., Pt-, Ru-, Au-, Fe-, Cu-, Ni-, Zn-, and Sn-complexes) targeting MMPs and their potentials for treating and/or caring the most fatal human diseases, cancers and AD.
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Affiliation(s)
- Yen Thi Nguyen
- Department of Chemistry, Kongju National University, Gongju 32588, Chungcheongnam-do, Republic of Korea
| | - Namdoo Kim
- Department of Chemistry, Kongju National University, Gongju 32588, Chungcheongnam-do, Republic of Korea
- Correspondence: (N.K.); (H.J.L.)
| | - Hyuck Jin Lee
- Department of Chemistry Education, Kongju National University, Gongju 32588, Chungcheongnam-do, Republic of Korea
- Correspondence: (N.K.); (H.J.L.)
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10
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La Manna S, Florio D, Panzetta V, Roviello V, Netti PA, Di Natale C, Marasco D. Hydrogelation tunability of bioinspired short peptides. SOFT MATTER 2022; 18:8418-8426. [PMID: 36300826 DOI: 10.1039/d2sm01385a] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Supramolecular assemblies of short peptides are experiencing a stimulating flowering. Herein, we report a novel class of bioinspired pentapeptides, not bearing Phe, that form hydrogels with fibrillar structures. The inherent sequence comes from the fragment 269-273 of nucleophosmin 1 protein, that is normally involved in liquid-liquid phase separation processes into the nucleolus. By means of rheology, spectroscopy, and scanning microscopy the crucial roles of the extremities in the modulation of the mechanical properties of hydrogels were elucidated. Three of four peptide showed a typical shear-thinning profile and a self-assembly into hierarchical nanostructures fibers and two of them resulted biocompatible in MCF7 cells. The presence of an amide group at C-terminal extremity caused the fastest aggregation and the major content of structured intermediates during gelling process. The tunable mechanical and structural features of this class of hydrogels render derived supramolecular systems versatile and suitable for future biomedical applications.
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Affiliation(s)
- Sara La Manna
- Department of Pharmacy, University of Naples "Federico II", 80131, Naples, Italy.
| | - Daniele Florio
- Department of Pharmacy, University of Naples "Federico II", 80131, Naples, Italy.
| | - Valeria Panzetta
- Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples "Federico II", 80125, Naples, Italy
- Department of Ingegneria Chimica del Materiali e della Produzione Industriale (DICMAPI), University of Naples "Federico II", 80125, Naples, Italy
- Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125, Naples, Italy
| | - Valentina Roviello
- Department of Ingegneria Chimica del Materiali e della Produzione Industriale (DICMAPI), University of Naples "Federico II", 80125, Naples, Italy
| | - Paolo Antonio Netti
- Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples "Federico II", 80125, Naples, Italy
- Department of Ingegneria Chimica del Materiali e della Produzione Industriale (DICMAPI), University of Naples "Federico II", 80125, Naples, Italy
- Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125, Naples, Italy
| | - Concetta Di Natale
- Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples "Federico II", 80125, Naples, Italy
- Department of Ingegneria Chimica del Materiali e della Produzione Industriale (DICMAPI), University of Naples "Federico II", 80125, Naples, Italy
- Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125, Naples, Italy
| | - Daniela Marasco
- Department of Pharmacy, University of Naples "Federico II", 80131, Naples, Italy.
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Florio D, Roviello V, La Manna S, Napolitano F, Maria Malfitano A, Marasco D. Small molecules enhancers of amyloid aggregation of C-terminal domain of Nucleophosmin 1 in acute myeloid leukemia. Bioorg Chem 2022; 127:106001. [DOI: 10.1016/j.bioorg.2022.106001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 06/23/2022] [Accepted: 06/30/2022] [Indexed: 11/26/2022]
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La Manna S, Florio D, Di Natale C, Lagreca E, Sibillano T, Giannini C, Marasco D. Type C mutation of nucleophosmin 1 acute myeloid leukemia: Consequences of intrinsic disorder. Biochim Biophys Acta Gen Subj 2022; 1866:130173. [PMID: 35597503 DOI: 10.1016/j.bbagen.2022.130173] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 04/09/2022] [Accepted: 05/13/2022] [Indexed: 11/25/2022]
Abstract
BACKGROUND Nucleophosmin 1 (NPM1) protein is a multifunctional nucleolar chaperone and its gene is the most frequently mutated in Acute Myeloid Leukemia (AML). AML mutations cause the unfolding of the C-terminal domain (CTD) and the protein delocalizing in the cytosol (NPM1c+). Marked aggregation endowed with an amyloid character was assessed as consequences of mutations. SCOPE Herein we analyzed the effects of type C mutation on two protein regions: i) a N-terminal extended version of the CTD, named Cterm_mutC and ii) a shorter polypeptide including the sequences of the second and third helices of the CTD, named H2_mutC. MAJOR CONCLUSIONS Both demonstrated able to self-assembly with different kinetics and conformational intermediates and to provide fibers presenting large flexible regions. GENERAL SIGNIFICANCE The present study adds a new piece of knowledge to the effects of AML-mutations on structural biology of Nucleophosmin 1, that could be exploited in therapeutic interventions targeting selectively NPMc+.
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Affiliation(s)
- Sara La Manna
- Department of Pharmacy, University of Naples "Federico II", 80131 Naples, Italy
| | - Daniele Florio
- Department of Pharmacy, University of Naples "Federico II", 80131 Naples, Italy
| | - Concetta Di Natale
- Interdisciplinary Research Centre on Biomaterials (CRIB), Department of Ingegneria Chimica, dei Materiali e della Produzione Industriale (DICMAPI), Italy; Istituto Italiano di Tecnologia, University of Naples "Federico II", Largo Barsanti e Matteucci 53, Naples 80125, Italy
| | - Elena Lagreca
- Interdisciplinary Research Centre on Biomaterials (CRIB), Department of Ingegneria Chimica, dei Materiali e della Produzione Industriale (DICMAPI), Italy; Istituto Italiano di Tecnologia, University of Naples "Federico II", Largo Barsanti e Matteucci 53, Naples 80125, Italy
| | - Teresa Sibillano
- Institute of Crystallography (IC), National Research Council, 70125 Bari, Italy
| | - Cinzia Giannini
- Institute of Crystallography (IC), National Research Council, 70125 Bari, Italy
| | - Daniela Marasco
- Department of Pharmacy, University of Naples "Federico II", 80131 Naples, Italy.
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Mansour AM, Khaled RM, Khaled E, Ahmed SK, Ismael OS, Zeinhom A, Magdy H, Ibrahim SS, Abdelfatah M. Ruthenium(II) carbon monoxide releasing molecules: Structural perspective, antimicrobial and anti-inflammatory properties. Biochem Pharmacol 2022; 199:114991. [DOI: 10.1016/j.bcp.2022.114991] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 03/05/2022] [Accepted: 03/07/2022] [Indexed: 01/12/2023]
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La Manna S, Leone M, Iacobucci I, Annuziata A, Di Natale C, Lagreca E, Malfitano AM, Ruffo F, Merlino A, Monti M, Marasco D. Glucosyl Platinum(II) Complexes Inhibit Aggregation of the C-Terminal Region of the Aβ Peptide. Inorg Chem 2022; 61:3540-3552. [PMID: 35171608 PMCID: PMC9951207 DOI: 10.1021/acs.inorgchem.1c03540] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Neurodegenerative diseases are often caused by uncontrolled amyloid aggregation. Hence, many drug discovery processes are oriented to evaluate new compounds that are able to modulate self-recognition mechanisms. Herein, two related glycoconjugate pentacoordinate Pt(II) complexes were analyzed in their capacity to affect the self-aggregation processes of two amyloidogenic fragments, Aβ21-40 and Aβ25-35, of the C-terminal region of the β-amyloid (Aβ) peptide, the major component of Alzheimer's disease (AD) neuronal plaques. The most water-soluble complex, 1Ptdep, is able to bind both fragments and to deeply influence the morphology of peptide aggregates. Thioflavin T (ThT) binding assays, electrospray ionization mass spectrometry (ESI-MS), and ultraviolet-visible (UV-vis) absorption spectroscopy indicated that 1Ptdep shows different kinetics and mechanisms of inhibition toward the two sequences and demonstrated that the peptide aggregation inhibition is associated with a direct coordinative bond of the compound metal center to the peptides. These data support the in vitro ability of pentacoordinate Pt(II) complexes to inhibit the formation of amyloid aggregates and pave the way for the application of this class of compounds as potential neurotherapeutics.
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Affiliation(s)
- Sara La Manna
- Department
of Pharmacy, University of Naples “Federico
II”, 80131 Naples, Italy
| | - Marilisa Leone
- Institute
of Biostructures and Bioimaging - CNR, 80134 Naples, Italy
| | - Ilaria Iacobucci
- Department
of Chemical Sciences, University of Naples
“Federico II”, 80126 Naples, Italy
- CEINGE
Biotecnologie Avanzate S.c.a r.l., “University
of Naples Federico II”, 80131 Naples, Italy
| | - Alfonso Annuziata
- Department
of Chemical Sciences, University of Naples
“Federico II”, 80126 Naples, Italy
| | - Concetta Di Natale
- Interdisciplinary
Research Centre on Biomaterials (CRIB), Department of Ingegneria Chimica
del Materiali e della Produzione Industriale (DICMAPI), University “Federico II”, 80125 Naples, Italy
| | - Elena Lagreca
- Interdisciplinary
Research Centre on Biomaterials (CRIB), Department of Ingegneria Chimica
del Materiali e della Produzione Industriale (DICMAPI), University “Federico II”, 80125 Naples, Italy
| | - Anna Maria Malfitano
- Department
of Translational Medical Science, University
of Naples “Federico II”, 80131 Naples, Italy
| | - Francesco Ruffo
- Department
of Chemical Sciences, University of Naples
“Federico II”, 80126 Naples, Italy
| | - Antonello Merlino
- Department
of Chemical Sciences, University of Naples
“Federico II”, 80126 Naples, Italy
| | - Maria Monti
- Department
of Chemical Sciences, University of Naples
“Federico II”, 80126 Naples, Italy
- CEINGE
Biotecnologie Avanzate S.c.a r.l., “University
of Naples Federico II”, 80131 Naples, Italy
| | - Daniela Marasco
- Department
of Pharmacy, University of Naples “Federico
II”, 80131 Naples, Italy
- Institute
of Biostructures and Bioimaging - CNR, 80134 Naples, Italy
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Ibrahim NM, Khaled RM, Ragheb MA, Radacki K, Farag AM, Mansour AM. Light-activated cytotoxicity of dicarbonyl Ru(II) complexes with a benzimidazole coligand towards breast cancer. Dalton Trans 2021; 50:15389-15399. [PMID: 34647551 DOI: 10.1039/d1dt02296b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reaction between [RuCl2(CO)2]n and 1H-benzimidazol-2-ylmethyl-(N-phenyl)amine ligands (LR) functionalized with various electron-donating and electron-withdrawing substituents on the phenyl ring (R = H, 4-CH3, 4-Cl, 4-COOCH3, and 3-COOCH3) afforded the dark-stable photoactivatable carbon monoxide prodrugs of the general formula [RuCl2(CO)2LR]. Release of the CO molecules from the Ru(II) compounds was examined by monitoring the electronic and IR spectra upon illumination at 365 nm. A noticeable decrease in the intensities of the two characteristic ν(CO) modes for Ru(CO)II2 species, and the growth of two new bands for the mono-carbonyl species and free CO, were the main features of the photolysis profiles. The cytotoxicity of the complexes towards breast cancer (MCF-7) cells was assessed with and without illumination at 365 nm. All the complexes except that with a 4-COOCH3 group (IC50 = 45.08 ± 3.5 μM) are nontoxic under dark conditions. Upon illumination, all the compounds acquired cytotoxicity in the following order: H > 4-COOCH3 > 4-CH3 > 4-Cl > 3-COOCH3. Investigation of the cytotoxicity of the CO-depleted fragments showed that the light-induced cytotoxicity can be attributed to the liberated CO and CO-depleted metal fragments, including the liberated benzimidazole ligands.
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Affiliation(s)
- Nourhan M Ibrahim
- Department of Chemistry, Faculty of Science, Cairo University, Gamma Street, Giza, Cairo 12613, Egypt.
| | - Rabaa M Khaled
- Department of Chemistry, Faculty of Science, Cairo University, Gamma Street, Giza, Cairo 12613, Egypt.
| | - Mohamed A Ragheb
- Department of Chemistry, Faculty of Science, Cairo University, Gamma Street, Giza, Cairo 12613, Egypt.
| | - Krzysztof Radacki
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Ahmad M Farag
- Department of Chemistry, Faculty of Science, Cairo University, Gamma Street, Giza, Cairo 12613, Egypt.
| | - Ahmed M Mansour
- Department of Chemistry, Faculty of Science, Cairo University, Gamma Street, Giza, Cairo 12613, Egypt.
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Current and emerging mass spectrometry methods for the preclinical development of metal-based drugs: a critical appraisal. Anal Bioanal Chem 2021; 414:95-102. [PMID: 34642780 DOI: 10.1007/s00216-021-03718-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 09/23/2021] [Accepted: 10/04/2021] [Indexed: 10/20/2022]
Abstract
This Trends article highlights the multiple ways in which the state-of-the-art molecular mass spectrometry can support the preclinical development of novel metal-based anticancer drugs. Examples from the recent literature-beyond routine characterization applications-are presented to illustrate what analytical and experimental design challenges are to be addressed to facilitate the translation of promising drug candidates to clinical practice.
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Manna SL, Florio D, Iacobucci I, Napolitano F, Benedictis ID, Malfitano AM, Monti M, Ravera M, Gabano E, Marasco D. A Comparative Study of the Effects of Platinum (II) Complexes on β-Amyloid Aggregation: Potential Neurodrug Applications. Int J Mol Sci 2021; 22:ijms22063015. [PMID: 33809522 PMCID: PMC7998721 DOI: 10.3390/ijms22063015] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 03/09/2021] [Accepted: 03/10/2021] [Indexed: 01/21/2023] Open
Abstract
Herein the effects of three platinum complexes, namely (SP-4-2)-(2,2'-bipyridine)dichloridoplatinum(II), Pt-bpy, (SP-4-2)-dichlorido(1,10-phenanthroline) platinum(II), Pt-phen, and (SP-4-2)-chlorido(2,2':6',2''-terpyridine)platinum(II) chloride, Pt-terpy, on the aggregation of an amyloid model system derived from the C-terminal domain of Aβ peptide (Aβ21-40) were investigated. Thioflavin T (ThT) binding assays revealed the ability of Pt(II) compounds to repress amyloid aggregation in a dose-dependent way, whereas the ability of Aβ21-40 peptide to interfere with ligand field of metal complexes was analyzed through UV-Vis absorption spectroscopy and electrospray ionization mass spectrometry. Spectroscopic data provided micromolar EC50 values and allowed to assess that the observed inhibition of amyloid aggregation is due to the formation of adducts between Aβ21-40 peptide and complexes upon the release of labile ligands as chloride and that they can explore different modes of coordination toward Aβ21-40 with respect to the entire Aβ1-40 polypeptide. In addition, conformational studies through circular dichroism (CD) spectroscopy suggested that Pt-terpy induces soluble β-structures of monomeric Aβ21-40, thus limiting self-recognition. Noticeably, Pt-terpy demonstrated the ability to reduce the cytotoxicity of amyloid peptide in human SH-SY5Y neuroblastoma cells. Presented data corroborate the hypothesis to enlarge the application field of already known metal-based agents to neurodegenerative diseases, as potential neurodrugs.
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Affiliation(s)
- Sara La Manna
- Department of Pharmacy, University of Naples “Federico II”, 80131 Naples, Italy; (S.L.M.); (D.F.); (I.D.B.)
| | - Daniele Florio
- Department of Pharmacy, University of Naples “Federico II”, 80131 Naples, Italy; (S.L.M.); (D.F.); (I.D.B.)
| | - Ilaria Iacobucci
- Department of Chemical Sciences, CEINGE Biotecnologie Avanzate S.c.a r.l., “University of Naples Federico II”, 80131 Naples, Italy; (I.I.); (M.M.)
| | - Fabiana Napolitano
- Department of Translational Medical Science, University of Naples “Federico II”, 80131 Naples, Italy; (F.N.); (A.M.M.)
| | - Ilaria De Benedictis
- Department of Pharmacy, University of Naples “Federico II”, 80131 Naples, Italy; (S.L.M.); (D.F.); (I.D.B.)
| | - Anna Maria Malfitano
- Department of Translational Medical Science, University of Naples “Federico II”, 80131 Naples, Italy; (F.N.); (A.M.M.)
| | - Maria Monti
- Department of Chemical Sciences, CEINGE Biotecnologie Avanzate S.c.a r.l., “University of Naples Federico II”, 80131 Naples, Italy; (I.I.); (M.M.)
| | - Mauro Ravera
- Department of Sciences and Technological Innovation (DiSIT), University of Piemonte Orientale “A. Avogadro”, 15121 Alessandria, Italy; (M.R.); (E.G.)
| | - Elisabetta Gabano
- Department of Sciences and Technological Innovation (DiSIT), University of Piemonte Orientale “A. Avogadro”, 15121 Alessandria, Italy; (M.R.); (E.G.)
| | - Daniela Marasco
- Department of Pharmacy, University of Naples “Federico II”, 80131 Naples, Italy; (S.L.M.); (D.F.); (I.D.B.)
- Correspondence: ; Tel.: +39-081-2534512; Fax: +39-081-2534574
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Ghosh R, Raveendranath R, Kishore N. Unraveling diverse action of triton X-100 and methimazole on lysozyme fibrillation/aggregation: Physicochemical insights. Int J Biol Macromol 2020; 167:736-745. [PMID: 33278448 DOI: 10.1016/j.ijbiomac.2020.11.210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 11/19/2020] [Accepted: 11/30/2020] [Indexed: 01/18/2023]
Abstract
Identification of functionalities responsible for prevention of fibrillation in proteins is important to design effective drugs in addressing neurodegenerative diseases. We have used nonionic surfactant triton X-100 (TX-100) and antithyroid drug methimazole (MMI) to understand mechanistic aspects of action of these molecules having different functionalities on hen egg-white lysozyme at different stages of fibrillation. After establishing the nucleation, elongation and maturation stages of fibrillation of protein at 57 °C, energetics of interactions with these molecules have been determined by using isothermal titration calorimetry. Differential scanning calorimetry has permitted assessment of thermal stability of the protein at these stages, with or without these molecular entities. The enthalpies of interaction of TX-100 and MMI with protein fibrils suggest importance of hydrogen bonding and polar interactions in their effectiveness towards prevention of fibrils. TX-100, in spite of several polar centres, is unable to prevent fibrillation, rather it promotes. MMI is able to establish polar interactions with interacting strands of the protein and disintegrate fibrils. A rigorous comparison with inhibitors reported in literature highlights importance -OH and >CO functionalities in fibrillation prevention. Even though MMI has hydrogen bonding centres, its efficiency as inhibitor falls after the inhibited lysozyme fibrils further interact and form amorphous aggregates.
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Affiliation(s)
- Ritutama Ghosh
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India
| | - Revathy Raveendranath
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India
| | - Nand Kishore
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India.
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