1
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Dennis DG, Joo Sun Y, Parsons DE, Mahajan VB, Smith M. Identification of highly potent and selective HTRA1 inhibitors. Bioorg Med Chem Lett 2024; 109:129814. [PMID: 38815872 DOI: 10.1016/j.bmcl.2024.129814] [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: 03/05/2024] [Revised: 05/17/2024] [Accepted: 05/21/2024] [Indexed: 06/01/2024]
Abstract
High temperature requirement A serine peptidase 1 (HTRA1) is a serine protease involved in an array of signaling pathways. It is also responsible for the regulation of protein aggregates via refolding, translocation, and degradation. It has subsequently been found that runaway proteolytic HTRA1 activity plays a role in a variety of diseases, including Age-Related Macular Degeneration (AMD), osteoarthritis, and Rheumatoid Arthritis. Selective inhibition of serine protease HTRA1 therefore offers a promising new strategy for the treatment of these diseases. Herein we disclose structure-activity-relationship (SAR) studies which identify key interactions responsible for binding affinity of small molecule inhibitors to HTRA1. The study results in highly potent molecules with IC50's less than 15 nM and excellent selectivity following a screen of 35 proteases.
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Affiliation(s)
- David G Dennis
- Medicinal Chemistry Knowledge Center, Sarafan ChEM-H, Stanford University, CA 94305, USA; Molecular Surgery Laboratory, Byers Eye Institute, Department of Ophthalmology, Stanford University, CA 94304, USA
| | - Young Joo Sun
- Molecular Surgery Laboratory, Byers Eye Institute, Department of Ophthalmology, Stanford University, CA 94304, USA
| | - Dylan E Parsons
- Medicinal Chemistry Knowledge Center, Sarafan ChEM-H, Stanford University, CA 94305, USA; Molecular Surgery Laboratory, Byers Eye Institute, Department of Ophthalmology, Stanford University, CA 94304, USA
| | - Vinit B Mahajan
- Molecular Surgery Laboratory, Byers Eye Institute, Department of Ophthalmology, Stanford University, CA 94304, USA; Veterans Affairs Palo Alto Health Care System, CA 94304, USA.
| | - Mark Smith
- Medicinal Chemistry Knowledge Center, Sarafan ChEM-H, Stanford University, CA 94305, USA.
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2
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Chang CY, Wang SSS, Lai YR, Koh WG, Wu JW, Chiang YH. Ophthalmic drug effects on the amyloidogenesis of a transforming growth factor β-induced protein (TGFBIp) peptide fragment. Exp Eye Res 2024; 244:109932. [PMID: 38762008 DOI: 10.1016/j.exer.2024.109932] [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: 11/05/2023] [Revised: 03/30/2024] [Accepted: 05/15/2024] [Indexed: 05/20/2024]
Abstract
Drugs that can treat one disease may either be detrimental or beneficial toward another due to possible cross-interactions. Therefore, care in choosing a suitable drug for patients with multiple diseases is crucial in successful patient management. This study explores several currently available ophthalmic drugs used to treat common ocular diseases to understand how they can affect the amyloidogenesis of a transforming growth factor β-induced protein (TGFBIp) peptide fragment found in abundance in the corneal protein aggregation deposits of lattice corneal dystrophy (LCD) patients. Results from this study provided supporting evidence that some drugs intended to treat other diseases can enhance or inhibit fibrillar aggregation of TGFBIp peptide, which may have potential implication of affecting the disease progression of LCD by either worsening or ameliorating it. Comparisons of the different properties of ophthalmic compounds explored in this study may also provide some guidance for future design of drugs geared toward the treatment of LCD.
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Affiliation(s)
- Chia-Yu Chang
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - Steven S-S Wang
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - You-Ren Lai
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - Won-Gun Koh
- Department of Chemical and Biomolecular Engineering, Yonsei University, South Korea
| | - Josephine W Wu
- Department of Optometry, Yuanpei University of Medical Technology, Hsinchu City, 30015, Taiwan; Department of Optometry, Mackay Medical College, New Taipei City, 252, Taiwan.
| | - Yi-Hui Chiang
- Department of Ophthalmology, En Chu Kong Hospital, New Taipei City, 237, Taiwan.
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3
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Low JYK, Shi X, Anandalakshmi V, Neo D, Peh GSL, Koh SK, Zhou L, Abdul Rahim MK, Boo K, Lee J, Mohanram H, Alag R, Mu Y, Mehta JS, Pervushin K. Release of frustration drives corneal amyloid disaggregation by brain chaperone. Commun Biol 2023; 6:348. [PMID: 36997596 PMCID: PMC10063603 DOI: 10.1038/s42003-023-04725-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 03/17/2023] [Indexed: 04/01/2023] Open
Abstract
TGFBI-related corneal dystrophy (CD) is characterized by the accumulation of insoluble protein deposits in the corneal tissues, eventually leading to progressive corneal opacity. Here we show that ATP-independent amyloid-β chaperone L-PGDS can effectively disaggregate corneal amyloids in surgically excised human cornea of TGFBI-CD patients and release trapped amyloid hallmark proteins. Since the mechanism of amyloid disassembly by ATP-independent chaperones is unknown, we reconstructed atomic models of the amyloids self-assembled from TGFBIp-derived peptides and their complex with L-PGDS using cryo-EM and NMR. We show that L-PGDS specifically recognizes structurally frustrated regions in the amyloids and releases those frustrations. The released free energy increases the chaperone's binding affinity to amyloids, resulting in local restructuring and breakage of amyloids to protofibrils. Our mechanistic model provides insights into the alternative source of energy utilized by ATP-independent disaggregases and highlights the possibility of using these chaperones as treatment strategies for different types of amyloid-related diseases.
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Affiliation(s)
- Jia Yi Kimberly Low
- School of Biological Sciences, Nanyang Technological University, Singapore, 637551, Singapore
| | - Xiangyan Shi
- Department of Biology, Shenzhen MSU-BIT University, 518172, Shenzhen, China
| | | | - Dawn Neo
- Singapore Eye Research Institute, 11 Third Hospital Avenue, Singapore, 168751, Singapore
| | - Gary Swee Lim Peh
- Singapore Eye Research Institute, 11 Third Hospital Avenue, Singapore, 168751, Singapore
| | - Siew Kwan Koh
- Singapore Eye Research Institute, 11 Third Hospital Avenue, Singapore, 168751, Singapore
| | - Lei Zhou
- School of Optometry, Department of Applied Biology and Chemical Technology, Research Centre for SHARP Vision (RCSV), The Hong Kong Polytechnic University, Hong Kong, China
- Centre for Eye and Vision Research (CEVR), 17W Hong Kong Science Park, Hong Kong, China
| | - M K Abdul Rahim
- School of Biological Sciences, Nanyang Technological University, Singapore, 637551, Singapore
| | - Ketti Boo
- School of Biological Sciences, Nanyang Technological University, Singapore, 637551, Singapore
| | - JiaXuan Lee
- School of Biological Sciences, Nanyang Technological University, Singapore, 637551, Singapore
| | - Harini Mohanram
- School of Biological Sciences, Nanyang Technological University, Singapore, 637551, Singapore
| | - Reema Alag
- School of Biological Sciences, Nanyang Technological University, Singapore, 637551, Singapore
| | - Yuguang Mu
- School of Biological Sciences, Nanyang Technological University, Singapore, 637551, Singapore
| | - Jodhbir S Mehta
- Singapore Eye Research Institute, 11 Third Hospital Avenue, Singapore, 168751, Singapore.
- Ophthalmology and Visual Sciences Academic Clinical Program, Duke-NUS Graduate Medical School, Singapore, 169857, Singapore.
- Singapore National Eye Centre, 11 Third Hospital Avenue, Singapore, 168751, Singapore.
| | - Konstantin Pervushin
- School of Biological Sciences, Nanyang Technological University, Singapore, 637551, Singapore.
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4
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Gabryelczyk B, Alag R, Philips M, Low K, Venkatraman A, Kannaian B, Shi X, Linder M, Pervushin K, Miserez A. In vivo liquid–liquid phase separation protects amyloidogenic and aggregation‐prone peptides during overexpression in
Escherichia coli
. Protein Sci 2022; 31:e4292. [PMID: 35481658 PMCID: PMC8994509 DOI: 10.1002/pro.4292] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 02/03/2022] [Accepted: 02/22/2022] [Indexed: 12/13/2022]
Abstract
Studying pathogenic effects of amyloids requires homogeneous amyloidogenic peptide samples. Recombinant production of these peptides is challenging due to their susceptibility to aggregation and chemical modifications. Thus, chemical synthesis is primarily used to produce amyloidogenic peptides suitable for high-resolution structural studies. Here, we exploited the shielded environment of protein condensates formed via liquid-liquid phase separation (LLPS) as a protective mechanism against premature aggregation. We designed a fusion protein tag undergoing LLPS in Escherichia coli and linked it to highly amyloidogenic peptides, including β amyloids. We find that the fusion proteins form membraneless organelles during overexpression and remain fluidic-like. We also developed a facile purification method of functional Aβ peptides free of chromatography steps. The strategy exploiting LLPS can be applied to other amyloidogenic, hydrophobic, and repetitive peptides that are otherwise difficult to produce.
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Affiliation(s)
- Bartosz Gabryelczyk
- Biological and Biomimetic Materials Laboratory (BBML), Center for Sustainable Materials (SusMat), School of Materials Science and Engineering Nanyang Technological University (NTU) Singapore
- Department of Bioproducts and Biosystems, School of Chemical Engineering Aalto University Espoo Finland
| | - Reema Alag
- School of Biological Sciences NTU Singapore
| | | | | | | | - Bhuvaneswari Kannaian
- Biological and Biomimetic Materials Laboratory (BBML), Center for Sustainable Materials (SusMat), School of Materials Science and Engineering Nanyang Technological University (NTU) Singapore
| | - Xiangyan Shi
- Department of Biology Shenzhen MSU‐BIT University Shenzhen China
| | - Markus Linder
- Department of Bioproducts and Biosystems, School of Chemical Engineering Aalto University Espoo Finland
| | | | - Ali Miserez
- Biological and Biomimetic Materials Laboratory (BBML), Center for Sustainable Materials (SusMat), School of Materials Science and Engineering Nanyang Technological University (NTU) Singapore
- School of Biological Sciences NTU Singapore
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5
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Wilson MR, Satapathy S, Jeong S, Fini ME. Clusterin, other extracellular chaperones, and eye disease. Prog Retin Eye Res 2021; 89:101032. [PMID: 34896599 DOI: 10.1016/j.preteyeres.2021.101032] [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: 04/01/2021] [Revised: 11/30/2021] [Accepted: 11/30/2021] [Indexed: 12/15/2022]
Abstract
Proteostasis refers to all the processes that maintain the correct expression level, location, folding and turnover of proteins, essential to organismal survival. Both inside cells and in body fluids, molecular chaperones play key roles in maintaining proteostasis. In this article, we focus on clusterin, the first-recognized extracellular mammalian chaperone, and its role in diseases of the eye. Clusterin binds to and inhibits the aggregation of proteins that are misfolded due to mutations or stresses, clears these aggregating proteins from extracellular spaces, and facilitates their degradation. Clusterin exhibits three main homeostatic activities: proteostasis, cytoprotection, and anti-inflammation. The so-called "protein misfolding diseases" are caused by aggregation of misfolded proteins that accumulate pathologically as deposits in tissues; we discuss several such diseases that occur in the eye. Clusterin is typically found in these deposits, which is interpreted to mean that its capacity as a molecular chaperone to maintain proteostasis is overwhelmed in the disease state. Nevertheless, the role of clusterin in diseases involving such deposits needs to be better defined before therapeutic approaches can be entertained. A more straightforward case can be made for therapeutic use of clusterin based on its proteostatic role as a proteinase inhibitor, as well as its cytoprotective and anti-inflammatory properties. It is likely that clusterin works together in this way with other extracellular chaperones to protect the eye from disease, and we discuss several examples. We end this article by predicting future steps that may lead to development of clusterin as a biological drug.
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Affiliation(s)
- Mark R Wilson
- Molecular Horizons and the School of Chemistry and Molecular Bioscience, University of Wollongong; Illawarra Health and Medical Research Institute, Northfields Avenue, Wollongong, New South Wales, 2522, Australia.
| | - Sandeep Satapathy
- Molecular Horizons and the School of Chemistry and Molecular Bioscience, University of Wollongong; Illawarra Health and Medical Research Institute, Northfields Avenue, Wollongong, New South Wales, 2522, Australia.
| | - Shinwu Jeong
- USC Roski Eye Institute and Department of Ophthalmology, Keck School of Medicine of USC, University of Southern California, 1333 San Pablo Street., Los Angeles, CA, 90033, USA.
| | - M Elizabeth Fini
- New England Eye Center, Tufts Medical Center and Department of Ophthalmology, Tufts University School of Medicine; Program in Pharmacology & Drug Development, Graduate School of Biomedical Sciences, Tufts University, 800 Washington St, Boston, MA, 02111, USA.
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6
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Targeted Expression of TGFBIp Peptides in Mouse and Human Tissue by MALDI-Mass Spectrometry Imaging. SEPARATIONS 2021. [DOI: 10.3390/separations8070097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Stromal corneal dystrophies are a group of hereditary disorders caused by mutations in the TGFBI gene. The mutant TGFBIp is prone to protein aggregation and the mutant protein gets deposited in the cornea, leading to severe visual impairment. The mutations lead to a corneal specific protein aggregation suggesting the involvement of tissue-specific factors. The exact molecular mechanism of the process of tissue-specific protein aggregation remains to be elucidated. Differential proteolysis of mutant TGFBIp is a critical component of the disease pathology. The differential proteolysis gives rise to shorter peptides that are highly aggregation-prone and initiate the aggregation cascade. Analyzing the proteolytic processing of the different TGFBIp mutant may provide insight to aid in understanding the amyloid aggregation mechanism. We developed a MALDI-MSI methodology to identify expression and spatial localization of TGFBIp peptides in the cornea. Corneal tissue samples were collected from both control and dystrophic patients (with 2 different mutations), embedded in OCT and sectioned. The sections were trypsin digested and subjected to mass spectrometry imaging using a targeted approach to detect TGFBIp. MALDI-MSI identified peptides from TGFBIp that co-localized with the amyloid corneal deposits. In addition to the relative abundance data, the specific location of the peptides across the corneal sections as molecular signatures was also identified. Spatial distribution and intensity of the TGFBIp peptides showed differences between diseased and control models but also between the two LCD phenotypes. The TGFBIp peptide with m/z of 787.474 and m/z of 1179.579 showed increased expression in both LCD mutants compared to the controls. The peptide with m/z of 929.5 showed increased expression in the LCD phenotype with H626R mutation while the peptide with m/z of 1315.802 was abundant in the sample with R124C mutation. This initial report of 2D spatial protein signature and localization of TGFBIp may be expanded to other mutations to understand the proteolytic patterns of TGFBIp in different mutations.
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Mutation-induced dimerization of transforming growth factor-β-induced protein may drive protein aggregation in granular corneal dystrophy. J Biol Chem 2021; 297:100858. [PMID: 34097874 PMCID: PMC8220419 DOI: 10.1016/j.jbc.2021.100858] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 05/23/2021] [Accepted: 06/03/2021] [Indexed: 11/21/2022] Open
Abstract
Protein aggregation in the outermost layers of the cornea, which can lead to cloudy vision and in severe cases blindness, is linked to mutations in the extracellular matrix protein transforming growth factor-β-induced protein (TGFBIp). Among the most frequent pathogenic mutations are R124H and R555W, both associated with granular corneal dystrophy (GCD) characterized by the early-onset formation of amorphous aggregates. The molecular mechanisms of protein aggregation in GCD are largely unknown. In this study, we determined the crystal structures of R124H, R555W, and the lattice corneal dystrophy-associated A546T. Although there were no changes in the monomeric TGFBIp structure of any mutant that would explain their propensity to aggregate, R124H and R555W demonstrated a new dimer interface in the crystal packing, which is not present in wildtype TGFBIp or A546T. This interface, as seen in both the R124H and R555W structures, involves residue 124 of the first TGFBIp molecule and 555 in the second. The interface is not permitted by the Arg124 and Arg555 residues of wildtype TGFBIp and may play a central role in the aggregation exhibited by R124H and R555W in vivo. Using cross-linking mass spectrometry and in-line size exclusion chromatography-small-angle X-ray scattering, we characterized a dimer formed by wildtype and mutant TGFBIps in solution. Dimerization in solution also involves interactions between the N- and C-terminal domains of two TGFBIp molecules but was not identical to the crystal packing dimerization. TGFBIp-targeted interventions that disrupt the R124H/R555W crystal packing dimer interface might offer new therapeutic opportunities to treat patients with GCD.
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8
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Aghamollaei H, Parvin S, Shahriary A. Review of proteomics approach to eye diseases affecting the anterior segment. J Proteomics 2020; 225:103881. [PMID: 32565161 DOI: 10.1016/j.jprot.2020.103881] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 06/08/2020] [Accepted: 06/16/2020] [Indexed: 01/12/2023]
Abstract
Visual impairment and blindness is a major health burden worldwide, and major ocular diseases causing visual impairment pertain to the anterior segment of the eye. Anterior segment ocular diseases are common, yet complex entities. Although many treatment options and surgical techniques are available for these ailments, the underlying cause and pathogenesis is still unclear. Finding ways to fundamentally treat these patients and rectify the underlying dysregulations leading to the disease may help cure patients completely without major complications. Proteomics approaches are a novel way to distinguish dysregulated proteins in a variety of biological tissues in a hypothesis-free manner, thus helping to find the responsible pathways leading to a certain disease. The aim of the current study is to review the available knowledge in scientific literature regarding the proteomics studies done on anterior segment eye diseases and suggest potential clinical implications to exploit the results of these studies. SIGNIFICANCE: Anterior segment ocular diseases are responsible for a major proportion of visual impairment and blindness worldwide. Although ophthalmologists have several treatment options that can alleviate or control the progression of these diseases, no definite cure is available for most of them. Moreover, because these diseases are progressive, prompt diagnosis is of utmost important. Proteomics studies enable us to identify and quantify the dysregulated proteins in a biological specimen in a hypothesis-free manner. Understanding the dysregulated protein pathways shines a light on the pathogenesis of the disease. Moreover, these dysregulated proteins may act as biomarkers to help in diagnosis and treatment follow-up. Hence, in this article we sought out to review the available scientific literature regarding the proteomics studies of anterior segment ocular diseases and to identify potential applications of proteomic studies in clinic.
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Affiliation(s)
- Hossein Aghamollaei
- Chemical Injuries Research Center, Systems biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Shahram Parvin
- Chemical Injuries Research Center, Systems biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Alireza Shahriary
- Chemical Injuries Research Center, Systems biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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Pharmaceutical modulation of the proteolytic profile of Transforming Growth Factor Beta induced protein (TGFBIp) offers a new avenue for treatment of TGFBI-corneal dystrophy. J Adv Res 2020; 24:529-543. [PMID: 32637173 PMCID: PMC7327833 DOI: 10.1016/j.jare.2020.05.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 04/15/2020] [Accepted: 05/11/2020] [Indexed: 11/24/2022] Open
Abstract
Corneal stromal dystrophies are a group of hereditary disorders caused by mutations in the TGFBI gene and affect the corneal stroma and epithelium. The disease is characterized by the accumulation of insoluble deposits of the mutant TGFBIp leading to poor visual acuity in patients. Mutations are hypothesized to disrupt the protein folding and stability, leading oligomerization of the mutant protein. Current treatment relies on surgical intervention, either tissue removal or substitution, both of which are associated with disease recurrence. The lead compounds reported here prevent/delay the atypical proteolysis of the mutant protein and the generation of amyloidogenic fragments.
Corneal dystrophies are a group of genetically inherited disorders with mutations in the TGFBI gene affecting the Bowman’s membrane and the corneal stroma. The mutant TGFBIp is highly aggregation-prone and is deposited in the cornea. Depending on the type of mutation the protein deposits may vary (amyloid, amorphous powdery aggregate or a mixed form of both), making the cornea opaque and thereby decreases visual acuity. The aggregation of the mutant protein is found to be specific with a unique aggregation mechanism distinct to the cornea. The proteolytic processing of the mutant protein is reported to be different compared to the WT protein. The proteolytic processing of mutant protein gives rise to highly amyloidogenic peptide fragments. The current treatment option, available for patients, is tissue replacement surgery that is associated with high recurrence rates. The clinical need for a simple treatment option for corneal dystrophy patients has become highly essential either to prevent the protein aggregation or to dissolve the preformed aggregates. Here, we report the screening of 2500 compounds from the Maybridge RO3 fragment library using weak affinity chromatography (WAC). The primary hits from WAC were validated by 15N-HSQC NMR assays and specific regions of binding were identified. The recombinant mutant proteins (4th FAS-1 domain of R555W and H572R) were subjected to limited proteolysis by trypsin together with the lead compounds identified by NMR assays. The lead compounds (MO07617, RJF00203 and, BTB05094) were effective to delay/prevent the generation of amyloidogenic peptides in the R555W mutant and compounds (RJF00203 and BTB05094) were effective to delay/prevent the generation of amyloidogenic peptides in the H572R mutant. Thus the lead compounds reported here upon further validation and/or modification might be proposed as a potential treatment option to prevent/delay aggregation by inhibiting the formation of amyloidogenic peptides in TGFBI-corneal dystrophy.
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Key Words
- 1D, 1-Dimensional
- 2D, 2-Dimensional
- 3D, 3-Dimensional
- AA, Amino Acid
- BMRB, Biological Magnetic Resonance Data Bank
- Corneal dystrophy
- DMSO, Dimethyl sulfoxide
- DSS, 4, 4-dimethyl-4-silapentane-1-sulfonic acid
- EIC, Extracted Ion Chromatogram
- EMI, Emilin-like domain
- FAS1, Fasciclin like Domain
- FPLC, Fast Protein Liquid Chromatography
- Fragment screening
- GCD, Granular Corneal Dystrophy
- HPLC, High-performance liquid chromatography
- HSQC, Heteronuclear Single Quantum Coherence Spectroscopy
- IPTG, Isopropyl-beta-D-thiogalactopyranoside
- ITC, Isothermal Titration Calorimetry
- LB, Luria Bertani
- LCD, Lattice Corneal Dystrophy
- LE, Ligand Efficiency
- MALDI, Matrix-Assisted Laser Desorption/Ionization
- MS, Mass spectrometry/spectrometer
- PBS, Phosphate Buffered Saline
- Proteolysis
- SD, Standard Deviation
- SDS-PAGE, Sodium Dodecyl Sulphate-polyacrylamide gel electrophoresis
- SPR, Surface Plasmon Resonance
- TFA, Trifluoroacetic acid
- TGFBI, Transforming Growth Factor Beta Induced
- TGFBIp
- TGFBIp, Transforming Growth Factor Beta Induced protein
- TOF, Time-of-Flight
- WAC, Weak affinity chromatography
- WT, Wild Type
- Weak affinity chromatography
- ms, Millisecond
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Nielsen NS, Poulsen ET, Lukassen MV, Chao Shern C, Mogensen EH, Weberskov CE, DeDionisio L, Schauser L, Moore TC, Otzen DE, Hjortdal J, Enghild JJ. Biochemical mechanisms of aggregation in TGFBI-linked corneal dystrophies. Prog Retin Eye Res 2020; 77:100843. [DOI: 10.1016/j.preteyeres.2020.100843] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 01/17/2020] [Accepted: 01/23/2020] [Indexed: 12/22/2022]
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11
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Lee W, Park EJ, Kwon OK, Kim H, Yoo Y, Kim SW, Seo YK, Kim IS, Na DH, Bae JS. Dual peptide-dendrimer conjugate inhibits acetylation of transforming growth factor β-induced protein and improves survival in sepsis. Biomaterials 2020; 246:120000. [PMID: 32247936 DOI: 10.1016/j.biomaterials.2020.120000] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 03/21/2020] [Accepted: 03/23/2020] [Indexed: 02/06/2023]
Abstract
Sepsis is a potentially fatal complication of infections and there are currently no effective therapeutic options for severe sepsis. In this study, we revealed the secretion mechanism of transforming growth factor β-induced protein (TGFBIp) that was recently identified as a therapeutic target for sepsis, and designed TGFBIp acetylation inhibitory peptide (TAIP) that suppresses acetylation of lysine 676 in TGFBIp. To improve bioavailability and biodegradation of the peptide, TAIP was conjugated to polyamidoamine (PAMAM) dendrimers. Additionally, the cell-penetrating peptide (CPP) was conjugated to the TAIP-modified PAMAM dendrimers for the intracellular delivery of TGFBIp. The resulting nanostructures, decorated with TAIP and CPP via poly(ethylene glycol) linkage, improved the mortality and organ damage in the septic mouse model and suppressed lipopolysaccharide-activated severe vascular inflammatory responses in endothelial cells. Thus, the dendrimer-based nanostructures for delivery of TAIP using CPP show great promise in practical applications in sepsis therapy.
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Affiliation(s)
- Wonhwa Lee
- College of Pharmacy, CMRI, Research Institute of Pharmaceutical Sciences, BK21 Plus KNU Multi-Omics Based Creative Drug Research Team, Kyungpook National University, Daegu, 41566, Republic of Korea; Aging Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Republic of Korea.
| | - Eun Ji Park
- College of Pharmacy, Chung-Ang University, Seoul, 06974, Republic of Korea; D&D Pharmatech, Seongnam, Gyeonggi-do, 13486, Republic of Korea.
| | - Oh Kwang Kwon
- College of Pharmacy, CMRI, Research Institute of Pharmaceutical Sciences, BK21 Plus KNU Multi-Omics Based Creative Drug Research Team, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Hyelim Kim
- College of Pharmacy, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Youngbum Yoo
- Aging Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Republic of Korea
| | - Shin-Woo Kim
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, 41944, Republic of Korea
| | - Young-Kyo Seo
- Aging Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Republic of Korea
| | - In-San Kim
- Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea; KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Dong Hee Na
- College of Pharmacy, Chung-Ang University, Seoul, 06974, Republic of Korea.
| | - Jong-Sup Bae
- College of Pharmacy, CMRI, Research Institute of Pharmaceutical Sciences, BK21 Plus KNU Multi-Omics Based Creative Drug Research Team, Kyungpook National University, Daegu, 41566, Republic of Korea.
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12
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Effect of osmolytes on in-vitro aggregation properties of peptides derived from TGFBIp. Sci Rep 2020; 10:4011. [PMID: 32132634 PMCID: PMC7055237 DOI: 10.1038/s41598-020-60944-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Accepted: 02/14/2020] [Indexed: 12/17/2022] Open
Abstract
Protein aggregation has been one of the leading triggers of various disease conditions, such as Alzheimer’s, Parkinson’s and other amyloidosis. TGFBI-associated corneal dystrophies are protein aggregation disorders in which the mutant TGFBIp aggregates and accumulates in the cornea, leading to a reduction in visual acuity and blindness in severe cases. Currently, the only therapy available is invasive and there is a known recurrence after surgery. In this study, we tested the inhibitory and amyloid dissociation properties of four osmolytes in an in-vitroTGFBI peptide aggregation model. The 23-amino acid long peptide (TGFBIp 611–633 with the mutation c.623 G>R) from the 4th FAS-1 domain of TGFBIp that rapidly forms amyloid fibrils was used in the study. Several biophysical methods like Thioflavin T (ThT) fluorescence, Circular Dichroism (CD), fluorescence microscopy and Transmission electron microscopy (TEM) were used to study the inhibitory and amyloid disaggregation properties of the four osmolytes (Betaine, Raffinose, Sarcosine, and Taurine). The osmolytes were effective in both inhibiting and disaggregating the amyloid fibrils derived from TGFBIp 611–633 c.623 G>R peptide. The osmolytes did not have an adverse toxic effect on cultured human corneal fibroblast cells and could potentially be a useful therapeutic strategy for patients with TGFBIp corneal dystrophies.
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Han J, Zhang M, Lin HY, Huang FY, Lin YY, Tan GH, Zheng ZY. Impaired Autophagic Degradation of Transforming Growth Factor-β-Induced Protein by Macrophages in Lattice Corneal Dystrophy. Invest Ophthalmol Vis Sci 2019; 60:978-989. [PMID: 30884524 DOI: 10.1167/iovs.18-25838] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose Lattice corneal dystrophy (LCD) is related to the denaturation of transforming growth factor-β-induced protein (TGFBIp). Autophagic degradation of the denatured proteins by macrophages is one pathway to remove the denatured proteins. Thus, we investigated the role of autophagy in the degradation of mutant (MU) TGFBIp in macrophages. Methods Corneas from participants were observed by slit-lamp photography and subjected to histopathologic and genetic analysis. Wild-type (WT) and MU TGFBIp were recombined and expressed. Macrophages from MU participants were isolated and cocultured with the recombinant TGFBIp. Colocalization of the two molecules was observed by immunofluorescent microscopy. Enzyme-linked immunosorbent assay, Western blotting, and flow cytometry were used to detect changes in molecule expression related to the phenotype and autophagy process. Results Fourteen members from a family of 25 were identified as LCD sufferers. Significant TGFBIp aggregates and macrophage infiltration were found only in the corneas of LCD sufferers. Marker accumulation of TGFBIp was found in macrophages exposed to MU TGFBIp even at 5 hours after MU TGFBIp was withdrawn. High expressions of CD68 and CD36 were found in macrophages exposed to WT TGFBIp, but not to MU TGFBIp. Impaired autophagic flux due to defective autophagosome fusion to lysosomes was found in macrophages exposed to MU TGFBIp. Blockage of the autophagic process suppressed the expression of CD68 and CD36 in macrophages exposed to WT TGFBIp to levels similar to those found in macrophages exposed to MU TGFBIp. Conclusions Our results suggested that reversion of the defective autophagic process in macrophages may be a therapeutic strategy for patients with LCD.
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Affiliation(s)
- Ji Han
- Hainan Provincial Key Laboratory of Tropical Medicine, Hainan Medical College, Haikou, China.,Department of Ophthalmology, The First Affiliated Hospital of Hainan Medical College, Haikou, China
| | - Ming Zhang
- Hainan Provincial Key Laboratory of Tropical Medicine, Hainan Medical College, Haikou, China
| | - Hai-Yan Lin
- Hainan Provincial Key Laboratory of Tropical Medicine, Hainan Medical College, Haikou, China
| | - Feng-Ying Huang
- Hainan Provincial Key Laboratory of Tropical Medicine, Hainan Medical College, Haikou, China
| | - Ying-Ying Lin
- Hainan Provincial Key Laboratory of Tropical Medicine, Hainan Medical College, Haikou, China
| | - Guang-Hong Tan
- Hainan Provincial Key Laboratory of Tropical Medicine, Hainan Medical College, Haikou, China
| | - Zhen-You Zheng
- Hainan Provincial Key Laboratory of Tropical Medicine, Hainan Medical College, Haikou, China.,Department of Ophthalmology, The First Affiliated Hospital of Hainan Medical College, Haikou, China
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Venkatraman A, Hochart G, Bonnel D, Stauber J, Shimmura S, Rajamani L, Pervushin K, Mehta JS. Matrix-Assisted Laser Desorption Ionization Mass Spectrometry Imaging of Key Proteins in Corneal Samples from Lattice Dystrophy Patients with TGFBI-H626R and TGFBI-R124C Mutations. Proteomics Clin Appl 2018; 13:e1800053. [PMID: 30387319 DOI: 10.1002/prca.201800053] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 10/23/2018] [Indexed: 11/09/2022]
Abstract
SCOPE The purpose of this study is to identify and visualize the spatial distribution of proteins present in amyloid corneal deposits of TGFBI-CD patients using Mass Spectrometry Imaging (MSI) and compare it with healthy control cornea. Corneal Dystrophies (CD) constitute a group of genetically inherited protein aggregation disorders that affects different layers of the cornea. With accumulated protein deposition, the cornea becomes opaque with decreased visual acuity. CD affecting the stroma and Bowman's membrane, is associated with mutations in transforming growth factor β-induced (TGFBI) gene. METHODS MALDI-Mass Spectrometry Imaging (MSI) is performed on 2 patient corneas and is compared with 1 healthy control cornea using a 7T-MALDI-FTICR. Molecular images obtained are overlaid with congo-red stained sections to visualize the proteins associated with the corneal amyloid aggregates. RESULTS MALDI-MSI provides a relative abundance and two dimensional spatial protein signature of key proteins (TGFBIp, Apolipoprotein A-I, Apolipoprotein A-IV, Apolipoprotein E, Kaliocin-1, Pyruvate Kinase and Ras related protein Rab-10) in the patient deposits compared to the control. This is the first report of the anatomical localization of key proteins on corneal tissue section from CD patients. This may provide insight in understanding the mechanism of amyloid fibril formation in TGFBI-corneal dystrophy.
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Affiliation(s)
- Anandalakshmi Venkatraman
- 11 Third Hospital Avenue, 168751, Singapore.,School of Biological Sciences, Nanyang Technological University, 637551, Singapore
| | - Guillaume Hochart
- ImaBiotech, Parc Eurasanté, 885 Avenue Eugene Avinée, 59120, Loos, France
| | - David Bonnel
- ImaBiotech, Parc Eurasanté, 885 Avenue Eugene Avinée, 59120, Loos, France
| | - Jonathan Stauber
- ImaBiotech, Parc Eurasanté, 885 Avenue Eugene Avinée, 59120, Loos, France
| | - Shigeto Shimmura
- Department of Ophthalmology, Keio University, 35 Shinanomachi, 160-8582, Shinjuku Tokyo, Japan
| | - Lakshminaryanan Rajamani
- 11 Third Hospital Avenue, 168751, Singapore.,Ophthalmology and Visual Sciences Academic Clinical Program, Duke-NUS Graduate Medical School, 169857, Singapore
| | - Konstantin Pervushin
- School of Biological Sciences, Nanyang Technological University, 637551, Singapore
| | - Jodhbir S Mehta
- 11 Third Hospital Avenue, 168751, Singapore.,Ophthalmology and Visual Sciences Academic Clinical Program, Duke-NUS Graduate Medical School, 169857, Singapore.,Singapore National Eye Centre, 11 Third Hospital Avenue, 168751, Singapore
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