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Teruya K, Oguma A, Iwabuchi S, Nishizawa K, Doh-Ura K. Improvement of anti-prion efficacy with stearoxy conjugation of hydroxypropyl methylcellulose in prion-infected mice. Carbohydr Polym 2024; 337:122163. [PMID: 38710557 DOI: 10.1016/j.carbpol.2024.122163] [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: 12/27/2023] [Revised: 04/11/2024] [Accepted: 04/12/2024] [Indexed: 05/08/2024]
Abstract
Prion diseases are fatal transmissible neurodegenerative disorders. Among known anti-prions, hydroxypropyl methylcellulose compounds (HPMCs) are unique in their chemical structure and action. They have several excellent anti-prion properties but the effectiveness depends on the prion-infected mouse model. In the present study, we investigated the effects of stearoxy-modified HPMCs on prion-infected cells and mice. Stearoxy modification improved the anti-prion efficacy of HPMCs in prion-infected cells and significantly prolonged the incubation period in a lower HPMC-responding mouse model. However, stearoxy modification showed no improvement over nonmodified HPMCs in an HPMC-responding mouse model. These results offer a new line of inquiry for use with prion-infected mice that do not respond well to HPMCs.
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Affiliation(s)
- Kenta Teruya
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.
| | - Ayumi Oguma
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.
| | - Sara Iwabuchi
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.
| | - Keiko Nishizawa
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.
| | - Katsumi Doh-Ura
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan; Faculty of Medical Science & Welfare, Tohoku Bunka Gakuen University, Sendai, Miyagi, Japan.
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Teruya K, Oguma A, Iwabuchi S, Nishizawa K, Doh-Ura K. Combination of Styrylbenzoazole Compound and Hydroxypropyl Methylcellulose Enhances Therapeutic Effect in Prion-Infected Mice. Mol Neurobiol 2023:10.1007/s12035-023-03852-4. [PMID: 38114760 DOI: 10.1007/s12035-023-03852-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 11/22/2023] [Indexed: 12/21/2023]
Abstract
Prion diseases are fatal transmissible neurodegenerative disorders. Tremendous efforts have been made for prion diseases; however, no effective treatment is available. Several anti-prion compounds have a preference for which prion strains or prion-infected animal models to target. Styrylbenzoazole compound called cpd-B is effective in RML prion-infected mice but less so in 263K prion-infected mice, whereas hydroxypropyl methylcellulose is effective in 263K prion-infected mice but less so in RML prion-infected mice. In the present study, we developed a combination therapy of cpd-B and hydroxypropyl methylcellulose expecting synergistic effects in both RML prion-infected mice and 263K prion-infected mice. A single subcutaneous administration of this combination had substantially a synergistic effect in RML prion-infected mice but had no additive effect in 263K prion-infected mice. These results showed that the effect of cpd-B was enhanced by hydroxypropyl methylcellulose. The complementary nature of the two compounds in efficacy against prion strains, chemical properties, pharmacokinetics, and physical properties appears to have contributed to the effective combination therapy. Our results pave the way for the strategy of new anti-prion agents.
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Affiliation(s)
- Kenta Teruya
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, 2-1 Seiryo-Machi, Aoba-Ku, Sendai, Miyagi, 980-8575, Japan.
| | - Ayumi Oguma
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, 2-1 Seiryo-Machi, Aoba-Ku, Sendai, Miyagi, 980-8575, Japan
| | - Sara Iwabuchi
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, 2-1 Seiryo-Machi, Aoba-Ku, Sendai, Miyagi, 980-8575, Japan
| | - Keiko Nishizawa
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, 2-1 Seiryo-Machi, Aoba-Ku, Sendai, Miyagi, 980-8575, Japan
| | - Katsumi Doh-Ura
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, 2-1 Seiryo-Machi, Aoba-Ku, Sendai, Miyagi, 980-8575, Japan
- Faculty of Medical Science & Welfare, Tohoku Bunka Gakuen University, Sendai, Miyagi, Japan
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Saiki E, Iwase H, Horikawa Y, Shikata T. Structure and Conformation of Hydroxypropylmethyl Cellulose with a Wide Range of Molar Masses in Aqueous Solution─Effects of Hydroxypropyl Group Addition. Biomacromolecules 2023; 24:4199-4207. [PMID: 37594913 DOI: 10.1021/acs.biomac.3c00517] [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: 08/20/2023]
Abstract
The structure of hydroxypropylmethyl cellulose (HpMC) samples with a wide range of weight average molar masses (Mw) from 23 to 5000 kg mol-1, a controlled degree of substitution (DS) of 1.9 by methyl groups, and a molar substitution number (MS) of 0.25 by hydroxypropyl groups dissolved in aqueous solution was examined using static light scattering (SLS), dynamic light scattering (DLS), small-to-wide angle neutron scattering (S-WANS) techniques, and intrinsic viscosity ([η]) measurements. The determined Mw and the radius of gyration (Rg) showed the relationships Rg ∝ Mw1.0 and [η] ∝ Mw1.7 in a range of Mw < 100 kg mol-1, similar to rigid rod molecules in solution. However, exponents in the relationships decreased gradually with increasing Mw and reached ∼0.5 in a high Mw region, which is a typical value of flexible chain molecules for both Rg and [η]. These observations suggest that the HpMC samples behave as semiflexible rods with a certain persistence length (lp). The ratios of the hydrodynamic radius via DLS measurements to Rg also supported semiflexible rod behavior. Particle form factors and the average lengths (L) resulting from SLS and S-WANS experiments are well described with rigid rod particles in the range of Mw < 100 kg mol-1 and semiflexible rods with lp ∼ 100 nm in Mw > 100 kg mol-1. Because the average contour length (lc) calculated from Mw is approximately twice as long as L in the Mw range < 100 kg mol-1, the formed HpMC particles possess a folded hairpin-like elongated rigid rod structure. However, the lc/L value increases gradually in the range Mw > 200 kg mol-1, where the formed HpMC particles behave as semiflexible rods. The formed particle structure was substantially different from that found in methyl cellulose samples with a similar DS value, which showed rod-like behavior over a wide Mw range. The addition of hydroxypropyl groups only at MS = 0.25 effectively changed the formed particle structure.
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Affiliation(s)
- Erika Saiki
- Cellulose Research Unit, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
- Division of Natural Resources and Eco-materials, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Hiroki Iwase
- Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS), 162-1 Shirakata, Tokai, Ibaraki 319-1106, Japan
| | - Yoshiki Horikawa
- Cellulose Research Unit, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
- Division of Natural Resources and Eco-materials, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Toshiyuki Shikata
- Cellulose Research Unit, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
- Division of Natural Resources and Eco-materials, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
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Matsuike D, Tahara YO, Nonaka T, Wu HN, Hamaguchi T, Kudo H, Hayashi Y, Arai M, Miyata M. Structure and Function of Gli123 Involved in Mycoplasma mobile Gliding. J Bacteriol 2023; 205:e0034022. [PMID: 36749051 PMCID: PMC10029712 DOI: 10.1128/jb.00340-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Mycoplasma mobile is a fish pathogen that glides on solid surfaces by means of its own gliding machinery composed of internal and surface structures. In the present study, we focused on the function and structure of Gli123, a surface protein that is essential for the localization of other surface proteins. The amino acid sequence of Gli123, which is 1,128 amino acids long, contains lipoprotein-specific repeats. We isolated the native Gli123 protein from M. mobile cells and a recombinant protein, rGli123, from Escherichia coli. The isolated rGli123 complemented a nonbinding and nongliding mutant of M. mobile that lacked Gli123. Circular dichroism and rotary-shadowing electron microscopy (EM) showed that rGli123 has a structure that is not significantly different from that of the native protein. Rotary-shadowing EM suggested that Gli123 adopts two distinct globular and rod-like structures, depending on the ionic strength of the solution. Negative-staining EM coupled with single-particle analysis revealed that Gli123 forms a globular structure featuring a small protrusion with dimensions of approximately 15.7, 14.7, and 14.1 nm for the "height," major axis and minor axis, respectively. Small-angle X-ray scattering analyses indicated a rod-like structure composed of several tandem globular domains with total dimensions of approximately 34 nm in length and 6 nm in width. Both molecular structures were suggested to be dimers, based on the predicted molecular size and structure. Gli123 may have evolved by multiplication of repeating lipoprotein units and acquired a role for Gli521 and Gli349 assembly. IMPORTANCE Mycoplasmas are pathogenic bacteria that are widespread in animals. They are characterized by small cell and genome sizes but are equipped with unique abilities for infection, such as surface variation and gliding. Here, we focused on a surface-localizing protein named Gli123 that is essential for Mycoplasma mobile gliding. This study suggested that Gli123 undergoes drastic conformational changes between its rod-like and globular structures. These changes may be caused by a repetitive structure common in the surface proteins that is responsible for the modulation of the cell surface structure and related to the assembly process for the surface gliding machinery. An evolutionary process for surface proteins essential for this mycoplasma gliding was also suggested in the present study.
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Affiliation(s)
- Daiki Matsuike
- Graduate School of Science, Osaka Metropolitan University, Osaka, Japan
| | - Yuhei O Tahara
- Graduate School of Science, Osaka Metropolitan University, Osaka, Japan
- OCU Advanced Research Institute for Natural Science and Technology, Osaka Metropolitan University, Osaka, Japan
| | - Takahiro Nonaka
- Graduate School of Science, Osaka City University, Osaka, Japan
| | - Heng Ning Wu
- Graduate School of Science, Osaka City University, Osaka, Japan
| | - Tasuku Hamaguchi
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Miyagi, Japan
| | - Hisashi Kudo
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Meguro, Tokyo, Japan
- Graduate School of Science, Technology and Innovation, Kobe University, Nada, Kobe, Japan
| | - Yuuki Hayashi
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Meguro, Tokyo, Japan
- Environmental Science Center, The University of Tokyo, Bunkyo, Tokyo, Japan
| | - Munehito Arai
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Meguro, Tokyo, Japan
- Department of Physics, Graduate School of Science, The University of Tokyo, Meguro, Tokyo, Japan
| | - Makoto Miyata
- Graduate School of Science, Osaka Metropolitan University, Osaka, Japan
- OCU Advanced Research Institute for Natural Science and Technology, Osaka Metropolitan University, Osaka, Japan
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Bizmark N, Caggiano NJ, Liu JX, Arnold CB, Prud'homme RK, Datta SS, Priestley RD. Hysteresis in the thermally induced phase transition of cellulose ethers. SOFT MATTER 2022; 18:6254-6263. [PMID: 35946517 DOI: 10.1039/d2sm00564f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Functionalized cellulosics have shown promise as naturally derived thermoresponsive gelling agents. However, the dynamics of thermally induced phase transitions of these polymers at the lower critical solution temperature (LCST) are not fully understood. Here, with experiments and theoretical considerations, we address how molecular architecture dictates the mechanisms and dynamics of phase transitions for cellulose ethers. Above the LCST, we show that hydroxypropyl substituents favor the spontaneous formation of liquid droplets, whereas methyl substituents induce fibril formation through diffusive growth. In celluloses which contain both methyl and hydroxypropyl substituents, fibrillation initiates after liquid droplet formation, suppressing the fibril growth to a sub-diffusive rate. Unlike for liquid droplets, the dissolution of fibrils back into the solvated state occurs with significant thermal hysteresis. We tune this hysteresis by altering the content of substituted hydroxypropyl moieties. This work provides a systematic study to decouple competing mechanisms during the phase transition of multi-functionalized macromolecules.
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Affiliation(s)
- Navid Bizmark
- Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, New Jersey 08544, USA.
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Nicholas J Caggiano
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Jason X Liu
- Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, New Jersey 08544, USA.
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Craig B Arnold
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, USA
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Robert K Prud'homme
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Sujit S Datta
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Rodney D Priestley
- Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, New Jersey 08544, USA.
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, USA
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Saiki E, Yoshida M, Kurahashi K, Iwase H, Shikata T. Elongated Rodlike Particle Formation of Methyl Cellulose in Aqueous Solution. ACS OMEGA 2022; 7:28849-28859. [PMID: 36033728 PMCID: PMC9404515 DOI: 10.1021/acsomega.2c01859] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Accepted: 07/22/2022] [Indexed: 06/15/2023]
Abstract
The conformation and structure of methyl cellulose (MC) ether samples dissolved in pure water under dilute conditions were carefully reconsidered based on the results obtained using small-to-wide-angle neutron scattering (S-WANS), static light scattering (SLS), dynamic light scattering (DLS), and viscometric techniques. The examined MC samples possessed an average degree of substitution by methyl groups per glucose unit of ca 1.8 and weight average molar masses (M w), ranging from 23 to 790 kg mol-1. S-WANS experiments clearly demonstrated that the samples possess highly elongated rigid rodlike local structures in deuterium oxide solutions with weak periodicities of ca 0.4 and 1.0 nm on a length scale, which correspond to the average intermolecular distance between molecular chain portions facing each other in the formed rodlike structure and the repeating length of the monomeric cellobiose unit of molecular chains, respectively. Ratios of the particle length (L) to the radius of gyration (R g) determined by SLS techniques approximately showed the relationship LR g -1 = holding in rigid rods over the entire M w range examined in this study. However, the folding number, defined as the ratio of the average molecular contour length (l) to L, remained at the value of lL -1 ∼ 2, representing an elongated one-folded hairpin structure, until M w ∼ 300 kg mol-1 and increased substantially up to ca 4.9 at the highest M w of 790 kg mol-1. The observed increase in the lL -1 value corresponded well with an increase in the diameter of the formed rod with increasing M w observed in the S-WANS data. The M w dependencies of the translational diffusion coefficient determined via DLS measurements and that of the intrinsic viscosity detected via viscometric techniques also distinctly demonstrated that particles formed by the MC samples dissolved in aqueous solution behave as elongated rigid rods irrespective of M w.
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Affiliation(s)
- Erika Saiki
- Cellulose
Research Unit, Tokyo University of Agriculture
and Technology, 3-5-8
Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
- Division
of Natural Resources and Eco-materials, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Misato Yoshida
- Cellulose
Research Unit, Tokyo University of Agriculture
and Technology, 3-5-8
Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
- Division
of Natural Resources and Eco-materials, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Kei Kurahashi
- Cellulose
Research Unit, Tokyo University of Agriculture
and Technology, 3-5-8
Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
- Division
of Natural Resources and Eco-materials, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Hiroki Iwase
- Neutron
Science and Technology Center, Comprehensive
Research Organization for Science and Society (CROSS), 162-1 Shirakata, Tokai, Ibaraki 319-1106, Japan
| | - Toshiyuki Shikata
- Cellulose
Research Unit, Tokyo University of Agriculture
and Technology, 3-5-8
Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
- Division
of Natural Resources and Eco-materials, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
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Teruya K, Doh-Ura K. Therapeutic development of polymers for prion disease. Cell Tissue Res 2022; 392:349-365. [PMID: 35307792 DOI: 10.1007/s00441-022-03604-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 02/24/2022] [Indexed: 12/20/2022]
Abstract
Prion diseases, also known as transmissible spongiform encephalopathies, are caused by the accumulation of abnormal isoforms of the prion protein (scrapie isoform of the prion protein, PrPSc) in the central nervous system. Many compounds with anti-prion activities have been found using in silico screening, in vitro models, persistently prion-infected cell models, and prion-infected rodent models. Some of these compounds include several types of polymers. Although the inhibition or removal of PrPSc production is the main target of therapy, the unique features of prions, namely protein aggregation and assembly accompanied by steric structural transformation, may require different strategies for the development of anti-prion drugs than those for conventional therapeutics targeting enzyme inhibition, agonist ligands, or modulation of signaling. In this paper, we first overview the history of the application of polymers to prion disease research. Next, we describe the characteristics of each type of polymer with anti-prion activity. Finally, we discuss the common features of these polymers. Although drug delivery of these polymers to the brain is a challenge, they are useful not only as leads for therapeutic drugs but also as tools to explore the structure of PrPSc and are indispensable for prion disease research.
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Affiliation(s)
- Kenta Teruya
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Seiryo-cho, Aoba-ku, Sendai, 980-8575, Japan
| | - Katsumi Doh-Ura
- Department of Neurochemistry, Tohoku University Graduate School of Medicine, Seiryo-cho, Aoba-ku, Sendai, 980-8575, Japan.
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Gashti MP, Stir M, Burgener M, Hulliger J, Choobar BG, Nooralian Z, Moghaddam MR. Hydroxypropyl methylcellulose-controlled in vitro calcium phosphate biomineralization. NEW J CHEM 2022. [DOI: 10.1039/d2nj02365b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Scanning pyroelectric microscopy of DCPD single crystals.
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Affiliation(s)
- Mazeyar Parvinzadeh Gashti
- GTI Chemical Solutions, Inc., 29385, Wellford, South Carolina, USA
- InsectaPel, LLC, 29385, Wellford, South Carolina, USA
| | - Manuela Stir
- Department of Chemistry & Biochemistry, University of Berne, Freiestrasse 3 CH-3012, Berne, Switzerland
| | - Matthias Burgener
- Department of Chemistry & Biochemistry, University of Berne, Freiestrasse 3 CH-3012, Berne, Switzerland
| | - Jürg Hulliger
- Department of Chemistry & Biochemistry, University of Berne, Freiestrasse 3 CH-3012, Berne, Switzerland
| | - Behnam Ghalami Choobar
- Department of chemical engineering, Amirkabir University of technology (Tehran Polytechnic), Tehran, Iran
| | - Zoha Nooralian
- Young Researchers and Elites Club, Yadegar-e-Imam Khomeini (RAH) Branch, Islamic Azad University, Tehran, Iran
| | - Milad Rahimi Moghaddam
- Faculty of Industrial Engineering, Khajeh Nasir Toosi University of Technology, Tehran, Iran
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