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Nucleation and kinetics of SOD1 aggregation in human cells for ALS1. Mol Cell Biochem 2020; 466:117-128. [PMID: 32056106 DOI: 10.1007/s11010-020-03693-y] [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: 03/11/2019] [Accepted: 01/29/2020] [Indexed: 01/09/2023]
Abstract
Aberrant structural formations of Cu/Zn superoxide dismutase enzyme (SOD1) are the probable mechanism by which circumscribed mutations in the SOD1 gene cause familial amyotrophic lateral sclerosis (ALS1). SOD1 forms aberrant structures which can proceed by nucleation to insoluble aggregates. Here, the SOD1 aggregation reaction was investigated predominantly by time-course studies on ALS1 variants G85R, G37R, D101G, and D101N in human embryonic kidney cells (HEK293FT), with analysis by detergent ultracentrifugation extractions and high-resolution PAGE methodologies. Nucleation was found to be pseudo-zeroth order and dependent on time and concentration at constant 37.0 °C and pH 7.4. The predominant subsets of the total SOD1 expression set which comprised the nucleation phase were both soluble and insoluble inactive monomers, trimers, and hexamers with reduced intra-disulfide bonds. Superoxide exposure via paraquat initiated the formation of SOD1 trimers in untransfected SH-SY5Y cells and increased the aggregation propensity of G85R in HEK293FT. These data show the kinetic formation of aberrant SOD1 subsets implicated in ALS1 and indicate that superoxide substrate may initiate its radical polymerization. In an instance of the utility of methodological reductionism in molecular theory: though many ALS1 variants retain their global enzymatic activity, the SOD1 subsets most implicated in causing ALS1 do not retain their specific activity.
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Alemasov NA, Ivanisenko NV, Taneja B, Taneja V, Ramachandran S, Ivanisenko VA. Improved regression model to predict an impact of SOD1 mutations on ALS patients survival time based on analysis of hydrogen bond stability. J Mol Graph Model 2018; 86:247-255. [PMID: 30414557 DOI: 10.1016/j.jmgm.2018.10.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 10/19/2018] [Accepted: 10/22/2018] [Indexed: 11/16/2022]
Abstract
Amyotrophic lateral sclerosis (ALS) is an incurable neurodegenerative disease characterised by the inevitable degeneration of central and peripheral motor neurons. Aggregation of mutant SOD1 is one of the molecular mechanisms underlying the onset of the disease. There are a number of regression models designed to predict the survival of patients based on an analysis of experimental data on thermostability, heterodimerisation energy, and changes in the hydrophobicity of SOD1 mutants. Previously, we proposed regression models linking the change in the stability of hydrogen bonds in mutant SOD1 calculated using molecular dynamics and elastic networks with patients survival time. In this study, these models were improved in terms of accuracy of survival time prediction by taking into account the variance of survival time values relative to the mean, the number of patients carrying each specific mutation, and the use of random forest regression as a regression method. The accuracy of the previous models was roughly 5.2 years while the accuracy of the new ones are up to 4 years. The model is also superior to those published by other authors. It was found that the hydrogen bonds important for prediction of survival time are formed by residues at positions located in the regions of the protein responsible for aggregation as well as in structural and functionally important sites.
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Affiliation(s)
- Nikolay A Alemasov
- The Federal Research Center Institute of Cytology and Genetics, The Siberian Branch of the Russian Academy of Sciences, 630090, Prospekt Lavrentyeva 10, Novosibirsk, Russia.
| | - Nikita V Ivanisenko
- The Federal Research Center Institute of Cytology and Genetics, The Siberian Branch of the Russian Academy of Sciences, 630090, Prospekt Lavrentyeva 10, Novosibirsk, Russia
| | - Bhupesh Taneja
- CSIR-Institute of Genomics and Integrative Biology, 110025, New Delhi, Mathura Road, India
| | - Vibha Taneja
- Sir Ganga Ram Hospital, 110060, New Delhi, India
| | | | - Vladimir A Ivanisenko
- The Federal Research Center Institute of Cytology and Genetics, The Siberian Branch of the Russian Academy of Sciences, 630090, Prospekt Lavrentyeva 10, Novosibirsk, Russia
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Nys G, Fillet M. Microfluidics contribution to pharmaceutical sciences: From drug discovery to post marketing product management. J Pharm Biomed Anal 2018; 159:348-362. [DOI: 10.1016/j.jpba.2018.07.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 07/08/2018] [Accepted: 07/10/2018] [Indexed: 12/18/2022]
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Alemasov NA, Ivanisenko NV, Ramachandran S, Ivanisenko VA. Molecular mechanisms underlying the impact of mutations in SOD1 on its conformational properties associated with amyotrophic lateral sclerosis as revealed with molecular modelling. BMC STRUCTURAL BIOLOGY 2018; 18:1. [PMID: 29431095 PMCID: PMC5808480 DOI: 10.1186/s12900-018-0080-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Background So far, little is known about the molecular mechanisms of amyotrophic lateral sclerosis onset and progression caused by SOD1 mutations. One of the hypotheses is based on SOD1 misfolding resulting from mutations and subsequent deposition of its cytotoxic aggregates. This hypothesis is complicated by the fact that known SOD1 mutations of similar clinical effect could be distributed over the whole protein structure. Results In this work, a measure of hydrogen bond stability in conformational states was studied with elastic network analysis of 35 SOD1 mutants. Twenty-eight hydrogen bonds were detected in nine of 35 mutants with their stability being significantly different from that with the wild-type. These hydrogen bonds were formed by the amino acid residues known from the literature to be located in contact between SOD1 aggregates. Additionally, residues disposed between copper binding sites of both protein subunits were found from the models to form a stiff core, which can be involved in mechanical impulse transduction between these active centres. Conclusions The modelling highlights that both stability of the copper binding site and stability of the dimer can play an important role in ALS progression. Electronic supplementary material The online version of this article (10.1186/s12900-018-0080-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Nikolay A Alemasov
- The Federal Research Center Institute of Cytology and Genetics, The Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia.
| | - Nikita V Ivanisenko
- The Federal Research Center Institute of Cytology and Genetics, The Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia.,Novosibirsk State University, 630090, Novosibirsk, Russia
| | - Srinivasan Ramachandran
- Functional Genomics Unit, Council of Scientific and Industrial Research-Institute of Genomics and Integrative Biology (CSIR-IGIB), South Campus, New Delhi, 110025, India.,Academy of Scientific and Innovative Research, CSIR-IGIB, South Campus, New Delhi, 110025, India
| | - Vladimir A Ivanisenko
- The Federal Research Center Institute of Cytology and Genetics, The Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia
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Alemasov NA, Ivanisenko NV, Ivanisenko VA. Regression model for predicting pathogenic properties of SOD1 mutants based on the analysis of conformational stability and conservation of hydrogen bonds. J Mol Graph Model 2017; 77:378-385. [DOI: 10.1016/j.jmgm.2017.09.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 09/07/2017] [Accepted: 09/15/2017] [Indexed: 10/18/2022]
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Chang CT, Wang GJ, Kuo CC, Hsieh JY, Lee AS, Chang CM, Wang CC, Shen MY, Huang CC, Sawamura T, Yang CY, Stancel N, Chen CH. Electronegative Low-density Lipoprotein Increases Coronary Artery Disease Risk in Uremia Patients on Maintenance Hemodialysis. Medicine (Baltimore) 2016; 95:e2265. [PMID: 26765403 PMCID: PMC4718229 DOI: 10.1097/md.0000000000002265] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Electronegative low-density lipoprotein (LDL) is a recognized factor in the pathogenesis of coronary artery disease (CAD) in the general population, but its role in the development of CAD in uremia patients is unknown. L5 is the most electronegative subfraction of LDL isolated from human plasma. In this study, we examined the distribution of L5 (L5%) and its association with CAD risk in uremia patients.The LDL of 39 uremia patients on maintenance hemodialysis and 21 healthy controls was separated into 5 subfractions, L1-L5, with increasing electronegativity. We compared the distribution and composition of plasma L5 between uremia patients and controls, examined the association between plasma L5% and CAD risk in uremia patients, and studied the effects of L5 from uremia patients on endothelial function.Compared to controls, uremia patients had significantly increased L5% (P < 0.001) and L5 that was rich in apolipoprotein C3 and triglycerides. L5% was significantly higher in uremia patients with CAD (n = 10) than in those without CAD (n = 29) (P < 0.05). Independent of other major CAD risk factors, the adjusted odds ratio for CAD was 1.88 per percent increase in plasma L5% (95% CI, 1.01-3.53), with a near-linear dose-response relationship. Compared with controls, uremia patients had decreased flow-mediated vascular dilatation. In ex vivo studies with preconstricted rat thoracic aortic rings, L5 from uremia patients inhibited acetylcholine-induced relaxation. In cultured human endothelial cells, L5 inhibited endothelial nitric oxide synthase activation and induced endothelial dysfunction.Our findings suggest that elevated plasma L5% may induce endothelial dysfunction and play an important role in the increased risk of CAD in uremia patients.
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Affiliation(s)
- Chiz-Tzung Chang
- From the L5 Research Center, China Medical University (CMU) Hospital (C-TC, J-YH, A-SL, C-MC, M-YS, C-YY, C-HC); Division of Nephrology, CMU Hospital (C-TC, C-CK, C-CH); College of Medicine, CMU (C-TC, C-CK); Graduate Institute of Clinical Medical Science, CMU (G-JW, C-CW, M-YS); Department of Health and Nutrition Biotechnology, Asia University (G-JW), Taichung, Taiwan; Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA (C-CK); Department of Medicine, Mackay Medical College, New Taipei, Taiwan (A-SL); Department of Physiology, Shinshu University School of Medicine, Matsumoto, Nagono, Japan (TS); Vascular and Medicinal Research, Texas Heart Institute, Houston, Texas, USA (NS, C-HC); Lipid Science and Aging Research Center, Kaohsiung Medical University (KMU) (C-HC); Center for Lipid Biosciences, KMU Hospital, KMU, Kaohsiung (C-HC); New York Heart Research Foundation, Mineola, New York, USA (C-HC); and Lipid and Glycoimmune Research Center, Changhua Christian Hospital, Changhua, Taiwan (C-HC)
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Jang DH, Choi Y, Choi YS, Kim SM, Kwak H, Shin SH, Hong S. Sensitive and selective analysis of a wide concentration range of IGFBP7 using a surface plasmon resonance biosensor. Colloids Surf B Biointerfaces 2014; 123:887-91. [DOI: 10.1016/j.colsurfb.2014.10.037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 10/15/2014] [Accepted: 10/19/2014] [Indexed: 10/24/2022]
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Hong S, Park S, Park J, Yi J. Effect of end group modification of DNA-functionalized gold nanoparticles on cellular uptake in HepG2 cells. Colloids Surf B Biointerfaces 2013; 112:415-20. [DOI: 10.1016/j.colsurfb.2013.08.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Revised: 08/05/2013] [Accepted: 08/18/2013] [Indexed: 11/26/2022]
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