1
|
Sinha T, Bokhari SFH, Khan MU, Sarim Shaheer M, Amir M, Zia BF, Bakht D, Javed MA, Almadhoun MKIK, Burhanuddin M, Puli ST. Gazing Beyond the Horizon: A Systematic Review Unveiling the Theranostic Potential of Quantum Dots in Alzheimer's Disease. Cureus 2024; 16:e58677. [PMID: 38770476 PMCID: PMC11103116 DOI: 10.7759/cureus.58677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/20/2024] [Indexed: 05/22/2024] Open
Abstract
Alzheimer's disease (AD), a neurodegenerative disorder characterized by cognitive decline, poses a significant healthcare challenge worldwide. The accumulation of amyloid-beta (Aβ) plaques and hyperphosphorylated tau protein drives neuronal degeneration and neuroinflammation, perpetuating disease progression. Despite advancements in understanding the cellular and molecular mechanisms, treatment hurdles persist, emphasizing the need for innovative intervention strategies. Quantum dots (QDs) emerge as promising nanotechnological tools with unique photo-physical properties, offering advantages over conventional imaging modalities. This systematic review endeavors to elucidate the theranostic potential of QDs in AD by synthesizing preclinical and clinical evidence. A comprehensive search across electronic databases yielded 20 eligible studies investigating the diagnostic, therapeutic, or combined theranostic applications of various QDs in AD. The findings unveil the diverse roles of QDs, including inhibiting Aβ and tau aggregation, modulating amyloidogenesis pathways, restoring membrane fluidity, and enabling simultaneous detection of AD biomarkers. The review highlights the potential of QDs in targeting multiple pathological hallmarks, delivering therapeutic payloads across the blood-brain barrier, and facilitating real-time imaging and high-throughput screening. While promising, challenges such as biocompatibility, surface modifications, and clinical translation warrant further investigation. This systematic review provides a comprehensive synthesis of the theranostic potential of QDs in AD, paving the way for translational research and clinical implementation.
Collapse
Affiliation(s)
- Tanya Sinha
- Medical Education, Tribhuvan University, Kathmandu, NPL
| | | | | | - Muhammad Sarim Shaheer
- Internal Medicine, Faisalabad Medical University, Faisalabad, PAK
- Biochemistry, ABWA Medical College, Faisalabad, PAK
| | - Maaz Amir
- Medicine and Surgery, King Edward Medical University, Lahore, PAK
| | - Beenish Fatima Zia
- Medicine, Fatima Memorial Hospital College of Medicine and Dentistry, Lahore, PAK
| | - Danyal Bakht
- Medicine and Surgery, King Edward Medical University, Lahore, PAK
| | | | | | | | - Sai Teja Puli
- Internal Medicine, Bhaskar Medical College, Hyderabad, IND
| |
Collapse
|
2
|
Sano H, Kawaguchi S, Iimori T, Kuragano M, Tokuraku K, Uwai K. On-Site Evaluation of Constituent Content and Functionality of Perilla frutescens var. crispa Using Fluorescence Spectra. Molecules 2023; 28:7199. [PMID: 37894678 PMCID: PMC10609569 DOI: 10.3390/molecules28207199] [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: 09/11/2023] [Revised: 10/07/2023] [Accepted: 10/18/2023] [Indexed: 10/29/2023] Open
Abstract
Perilla frutescens leaves are hypothesized to possess antioxidant and amyloid-β (Aβ) aggregation inhibitory properties primarily due to their polyphenol-type compounds. While these bioactivities fluctuate daily, the traditional methods for quantifying constituent contents and functional properties are both laborious and impractical for immediate field assessments. To address this limitation, the present study introduces an expedient approach for on-site analysis, employing fluorescence spectra obtained through excitation light irradiation of perilla leaves. Standard analytical techniques were employed to evaluate various constituent contents (chlorophyl (Chl), total polyphenol content (TPC), total flavonoid content (TFC), and rosmarinic acid (RA)) and functional attributes (DPPH radical scavenging activity, ferric reducing antioxidant power (FRAP), oxygen radical absorbance capacity (ORAC), and Aβ aggregation inhibitory activity). Correlations between the fluorescence spectra and these parameters were examined using normalized difference spectral index (NDSI), ratio spectral index (RSI), and difference spectral index (DSI) analyses. The resulting predictive model exhibited a high coefficient of determination, with R2 values equal to or greater than 0.57 for constituent contents and 0.49 for functional properties. This approach facilitates the convenient, simultaneous, and nondestructive monitoring of both the chemical constituents and the functional capabilities of perilla leaves, thereby simplifying the determination of optimal harvest times. The model derived from this method holds promise for real-time assessments, indicating its potential for the simultaneous evaluation of both constituents and functionalities in perilla leaves.
Collapse
Affiliation(s)
| | | | | | | | | | - Koji Uwai
- Graduate School of Engineering, Muroran Institute of Technology, 27-1 Mizumoto-cho, Muroran 050-8585, Japan; (H.S.); (S.K.); (M.K.); (K.T.)
| |
Collapse
|
3
|
Cultivation Factors That Affect Amyloid-β Aggregation Inhibitory Activity in Perilla frutescens var. crispa. Foods 2023; 12:foods12030486. [PMID: 36766015 PMCID: PMC9913978 DOI: 10.3390/foods12030486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/15/2023] [Accepted: 01/17/2023] [Indexed: 01/24/2023] Open
Abstract
Alzheimer's disease (AD) is thought to be caused by the deposition of amyloid-β (Aβ) in the brain. Aβ begins to aggregate approximately 20 years before the expression of its symptoms. Previously, we developed a microliter-scale high-throughput screening (MSHTS) system for inhibitors against Aβ aggregation using quantum dot nanoprobes. Using this system, we also found that plants in the Lamiaceae, particularly Perilla frutescens var. crispa, have high activity. The cultivation environment has the potential to enhance Aβ aggregation inhibitory activity in plants by changing their metabolism. Here, we report on cultivation factors that affected the activity of P. frutescens var. crispa cultivated in three fields under different cultivation conditions. The results revealed that the activity of P. frutescens var. crispa harvested just before flowering was highest. Interestingly, the activity of wind-shielded plants that were cultivated to prevent exposure to wind, was reduced to 1/5th of plants just before flowering. Furthermore, activity just before flowering increased following appropriate nitrogen fertilization and at least one week of drying from the day before harvest. In addition, we confirmed that the P. frutescens var. crispa leaf extracts suppressed Aβ-induced toxicity in nerve growth factor-differentiated PC12 cells. In this study, we demonstrated that flowering, wind, soil water content, and soil nitrogen content affected Aβ aggregation inhibitory activity, necessary to suppress Aβ neurotoxicity, in P. frutescens var. crispa extracts. This study provides practical cultivation methods for P. frutescens var. crispa with high Aβ aggregation inhibitory activity for the prevention of AD.
Collapse
|
4
|
Baar S, Kuragano M, Tokuraku K, Watanabe S. Towards a comprehensive approach for characterizing cell activity in bright-field microscopic images. Sci Rep 2022; 12:16884. [PMID: 36207347 PMCID: PMC9546915 DOI: 10.1038/s41598-022-20598-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 09/15/2022] [Indexed: 11/23/2022] Open
Abstract
When studying physical cellular response observed by light microscopy, variations in cell behavior are difficult to quantitatively measure and are often only discussed on a subjective level. Hence, cell properties are described qualitatively based on a researcher’s impressions. In this study, we aim to define a comprehensive approach to estimate the physical cell activity based on migration and morphology based on statistical analysis of a cell population within a predefined field of view and timespan. We present quantitative measurements of the influence of drugs such as cytochalasin D and taxol on human neuroblastoma, SH-SY5Y cell populations. Both chemicals are well known to interact with the cytoskeleton and affect the cell morphology and motility. Being able to compute the physical properties of each cell for a given observation time, requires precise localization of each cell even when in an adhesive state, where cells are not visually differentiable. Also, the risk of confusion through contaminants is desired to be minimized. In relation to the cell detection process, we have developed a customized encoder-decoder based deep learning cell detection and tracking procedure. Further, we discuss the accuracy of our approach to quantify cell activity and its viability in regard to the cell detection accuracy.
Collapse
Affiliation(s)
- Stefan Baar
- Graduate School of Engineering, Muroran Institute of Technology, 27-1 Mizumoto-cho, Muroran, Hokkaido, 050-8585, Japan
| | - Masahiro Kuragano
- Graduate School of Engineering, Muroran Institute of Technology, 27-1 Mizumoto-cho, Muroran, Hokkaido, 050-8585, Japan
| | - Kiyotaka Tokuraku
- Graduate School of Engineering, Muroran Institute of Technology, 27-1 Mizumoto-cho, Muroran, Hokkaido, 050-8585, Japan
| | - Shinya Watanabe
- Graduate School of Engineering, Muroran Institute of Technology, 27-1 Mizumoto-cho, Muroran, Hokkaido, 050-8585, Japan.
| |
Collapse
|
5
|
Tyler SEB, Tyler LDK. Therapeutic roles of plants for 15 hypothesised causal bases of Alzheimer's disease. NATURAL PRODUCTS AND BIOPROSPECTING 2022; 12:34. [PMID: 35996065 PMCID: PMC9395556 DOI: 10.1007/s13659-022-00354-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 06/15/2022] [Indexed: 05/26/2023]
Abstract
Alzheimer's disease (AD) is progressive and ultimately fatal, with current drugs failing to reverse and cure it. This study aimed to find plant species which may provide therapeutic bioactivities targeted to causal agents proposed to be driving AD. A novel toolkit methodology was employed, whereby clinical symptoms were translated into categories recognized in ethnomedicine. These categories were applied to find plant species with therapeutic effects, mined from ethnomedical surveys. Survey locations were mapped to assess how this data is at risk. Bioactivities were found of therapeutic relevance to 15 hypothesised causal bases for AD. 107 species with an ethnological report of memory improvement demonstrated therapeutic activity for all these 15 causal bases. The majority of the surveys were found to reside within biodiversity hotspots (centres of high biodiversity under threat), with loss of traditional knowledge the most common threat. Our findings suggest that the documented plants provide a large resource of AD therapeutic potential. In demonstrating bioactivities targeted to these causal bases, such plants may have the capacity to reduce or reverse AD, with promise as drug leads to target multiple AD hallmarks. However, there is a need to preserve ethnomedical knowledge, and the habitats on which this knowledge depends.
Collapse
Affiliation(s)
| | - Luke D K Tyler
- School of Natural Sciences, Bangor University, Gwynedd, UK
| |
Collapse
|
6
|
Kubo K, Watanabe H, Kumeta H, Aizawa T, Seki C, Nakano H, Tokuraku K, Uwai K. Chemical analysis of amyloid β aggregation inhibitors derived from Geranium thunbergii. Bioorg Med Chem 2022; 68:116840. [PMID: 35661848 DOI: 10.1016/j.bmc.2022.116840] [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: 03/31/2022] [Revised: 05/18/2022] [Accepted: 05/18/2022] [Indexed: 11/17/2022]
Abstract
Amyloid β (Aβ) aggregates in the brains of patients with Alzheimer's disease (AD) and accumulates via oligomerization and subsequent fiber elongation processes. These toxicity-induced neuronal damage and shedding processes advance AD progression. Therefore, Aβ aggregation-inhibiting substances may contribute to the prevention and treatment of AD. We screened for Aβ42 aggregation inhibitory activity using various plant extracts and compounds, and found high activity for a Geranium thunbergii extract (EC50 = 18 μg/mL). Therefore, we screened for Aβ42 aggregation inhibitors among components of a G. thunbergii extract and investigated their chemical properties in this study. An active substance was isolated from the ethanol extract of G. thunbergii based on the Aβ42 aggregation inhibitory activity as an index, and the compound was identified as geraniin (1) based on spectral data. However, although geraniin showed in vitro aggregation-inhibition activity, no binding to Aβ42 was observed via saturation transfer difference-nuclear magnetic resonance (STD-NMR). In contrast, the hydrolysates gallic acid (2) and corilagin (5) showed aggregation-inhibiting activity and binding was observed via STD-NMR. Therefore, the hydrolysates produced under the conditions of the activity test may contribute to the Aβ42 aggregation-inhibition activity of G. thunbergii extracts. Geraniin derivatives may help prevent and treat AD.
Collapse
Affiliation(s)
- Kenji Kubo
- Graduate School of Engineering, Muroran Institute of Technology, 27-1Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan
| | - Hikaru Watanabe
- Graduate School of Engineering, Muroran Institute of Technology, 27-1Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan
| | - Hiroyuki Kumeta
- Graduate Schol of Life Science, Hokaido University, Kita 10, Nishi 8, Kita-ku, Saporo, Hokkaido 060-0808, Japan
| | - Tomoyasu Aizawa
- Graduate Schol of Life Science, Hokaido University, Kita 10, Nishi 8, Kita-ku, Saporo, Hokkaido 060-0808, Japan
| | - Chigusa Seki
- Graduate School of Engineering, Muroran Institute of Technology, 27-1Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan
| | - Hiroto Nakano
- Graduate School of Engineering, Muroran Institute of Technology, 27-1Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan
| | - Kiyotaka Tokuraku
- Graduate School of Engineering, Muroran Institute of Technology, 27-1Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan
| | - Koji Uwai
- Graduate School of Engineering, Muroran Institute of Technology, 27-1Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan.
| |
Collapse
|
7
|
Kuragano M, Yamanaka S, Tokuraku K. Kinetics of amyloid accumulation in physiological viscosity. Colloids Surf B Biointerfaces 2022; 214:112449. [PMID: 35306343 DOI: 10.1016/j.colsurfb.2022.112449] [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: 10/26/2021] [Revised: 02/18/2022] [Accepted: 03/07/2022] [Indexed: 11/24/2022]
Abstract
Abnormal aggregation and accumulation of misfolded proteins are involved in the development of various forms of amyloidosis. Aggregates that accumulate in organs induce an inflammatory response and cytotoxicity, and lead to organ failure. Although protein accumulation around an affected area in the body is an important stage that is directly linked to the mechanism of pathogenesis, the kinetics of the accumulation of protein that precipitates while assembling is not well understood because 3D tracking of proteins in solution is difficult. Here, we analyzed the process of aggregation and accumulation of amyloid β (Aβ), which causes the development of Alzheimer's disease (AD), by real-time 3D imaging under physiological conditions using a quantum dot nanoprobe that we previously developed. 3D observations demonstrated that Aβ aggregates with a diameter of several μm emerged in phosphate-buffered saline, gathered in a spiral-like step, and exhibited a mesh-like structure. Additionally, we found that the amount and size of aggregates decreased dramatically in 40% glycerol solution, mimicking the viscosity of human blood. We confirmed that fibrils in 40% glycerol exhibited an extremely short and tangled morphology and formed dense aggregates. Furthermore, numerical calculations revealed that several decades are required to fully develop the settling velocity and diameter of Aβ aggregates in physiological conditions. This time span is consistent with the actual symptom progression of AD.
Collapse
Affiliation(s)
- Masahiro Kuragano
- Graduate School of Engineering, Muroran Institute of Technology, Muroran, Hokkaido 050-8585, Japan
| | - Shinya Yamanaka
- Graduate School of Engineering, Muroran Institute of Technology, Muroran, Hokkaido 050-8585, Japan
| | - Kiyotaka Tokuraku
- Graduate School of Engineering, Muroran Institute of Technology, Muroran, Hokkaido 050-8585, Japan.
| |
Collapse
|
8
|
Take Y, Chikai Y, Shimamori K, Kuragano M, Kurita H, Tokuraku K. Amyloid β aggregation induces human brain microvascular endothelial cell death with abnormal actin organization. Biochem Biophys Rep 2022; 29:101189. [PMID: 34977364 PMCID: PMC8685982 DOI: 10.1016/j.bbrep.2021.101189] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 12/07/2021] [Accepted: 12/11/2021] [Indexed: 12/28/2022] Open
Abstract
Cerebral amyloid angiopathy (CAA) is a disease in which amyloid β (Aβ) is deposited on the walls of blood vessels in the brain, making those walls brittle and causing cerebral hemorrhage. However, the mechanism underlying its onset is not well understood. The aggregation and accumulation of Aβ cause the occlusion and fragility of blood vessels due to endothelial cell damage, breakdown of the blood-brain barrier, and replacement with elements constituting the blood vessel wall. In this study, we observed the effect of Aβ on human primary brain microvascular endothelial cells (hBMECs) in real-time using quantum dot nanoprobes to elucidate the mechanism of vascular weakening by Aβ. It was observed that Aβ began to aggregate around hBMECs after the start of incubation and that the cells were covered with aggregates. Aβ aggregates firmly anchored the cells on the plate surface, and eventually suppressed cell motility and caused cell death. Furthermore, Aβ aggregation induced the organization of abnormal actin, resulting in a significant increase in intracellular actin dots over 10 μm2. These results suggest that the mechanism by which Aβ forms a fragile vessel wall is as follows: Aβ aggregation around vascular endothelial cells anchors them to the substrate, induces abnormal actin organization, and leads to cell death. Amyloid β (Aβ) aggregates anchor human endothelial cells to the substrate. Aβ induces abnormal actin organization in human endothelial cells. Aβ induces cell death of human endothelial cells.
Collapse
Affiliation(s)
- Yushiro Take
- Graduate School of Engineering, Muroran Institute of Technology, Hokkaido, 050-8585, Japan
- Ohkawara Neurosurgical Hospital, Hokkaido, 050-0082, Japan
- Department of Cerebrovascular Surgery, International Medical Center, Saitama Medical University, Saitama, 350-1298, Japan
| | - Yusaku Chikai
- Graduate School of Engineering, Muroran Institute of Technology, Hokkaido, 050-8585, Japan
| | - Keiya Shimamori
- Graduate School of Engineering, Muroran Institute of Technology, Hokkaido, 050-8585, Japan
| | - Masahiro Kuragano
- Graduate School of Engineering, Muroran Institute of Technology, Hokkaido, 050-8585, Japan
| | - Hiroki Kurita
- Department of Cerebrovascular Surgery, International Medical Center, Saitama Medical University, Saitama, 350-1298, Japan
| | - Kiyotaka Tokuraku
- Graduate School of Engineering, Muroran Institute of Technology, Hokkaido, 050-8585, Japan
- Corresponding author.
| |
Collapse
|
9
|
Lin X, Watanabe K, Kuragano M, Tokuraku K. Aggregation of Mouse Serum Amyloid A Protein Was Promoted by Amyloid-Enhancing Factors with the More Genetically Homologous Serum Amyloid A. Int J Mol Sci 2021; 22:ijms22031036. [PMID: 33494290 PMCID: PMC7864520 DOI: 10.3390/ijms22031036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2021] [Revised: 01/18/2021] [Accepted: 01/20/2021] [Indexed: 12/13/2022] Open
Abstract
Amyloid A (AA) amyloidosis is a condition in which amyloid fibrils characterized by a linear morphology and a cross-β structure accumulate and are deposited extracellularly in organs, resulting in chronic inflammatory diseases and infections. The incidence of AA amyloidosis is high in humans and several animal species. Serum amyloid A (SAA) is one of the most important precursor amyloid proteins and plays a vital step in AA amyloidosis. Amyloid enhancing factor (AEF) serves as a seed for fibril formation and shortens the onset of AA amyloidosis sharply. In this study, we examined whether AEFs extracted and purified from five animal species (camel, cat, cattle, goat, and mouse) could promote mouse SAA (mSAA) protein aggregation in vitro using quantum-dot (QD) nanoprobes to visualize the aggregation. The results showed that AEFs shortened and promoted mSAA aggregation. In addition, mouse and cat AEFs showed higher mSAA aggregation-promoting activity than the camel, cattle, and goat AEFs. Interestingly, homology analysis of SAA in these five animal species revealed a more similar amino acid sequence homology between mouse and cat than between other animal species. Furthermore, a detailed comparison of amino acid sequences suggested that it was important to mSAA aggregation-promoting activity that the 48th amino acid was a basic residue (Lys) and the 125th amino acid was an acidic residue (Asp or Glu). These data imply that AA amyloidosis exhibits higher transmission activity among animals carrying genetically homologous SAA gene, and may provide a new understanding of the pathogenesis of amyloidosis.
Collapse
Affiliation(s)
- Xuguang Lin
- Muroran Institute of Technology, Graduate School of Engineering, Muroran 050-8585, Japan; (X.L.); (M.K.)
| | - Kenichi Watanabe
- Research Center of Global Agromedicine, Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan;
| | - Masahiro Kuragano
- Muroran Institute of Technology, Graduate School of Engineering, Muroran 050-8585, Japan; (X.L.); (M.K.)
| | - Kiyotaka Tokuraku
- Muroran Institute of Technology, Graduate School of Engineering, Muroran 050-8585, Japan; (X.L.); (M.K.)
- Correspondence: ; Tel.: +81-0143-46-5721
| |
Collapse
|
10
|
Daurichromenic Acid from the Chinese Traditional Medicinal Plant Rhododendron dauricum Inhibits Sphingomyelin Synthase and Aβ Aggregation. Molecules 2020; 25:molecules25184077. [PMID: 32906602 PMCID: PMC7571127 DOI: 10.3390/molecules25184077] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 08/31/2020] [Accepted: 09/02/2020] [Indexed: 01/05/2023] Open
Abstract
Species of the genus Rhododendron have been used in traditional Chinese medicine, with the medicinal herb "Manshanfong" used as an expectorant and for the treatment of acute bronchitis. Daurichromenic acid (DCA), a constituent of Rhododendron dauricum, is a meroterpenoid with antibacterial, anti-HIV, and anti-inflammatory activities. However, the mechanisms underlying these pharmacologic activities are poorly understood. To develop new drugs based on DCA, more information is required regarding its interactions with biomolecules. The present study showed that DCA inhibits the activity of the enzyme sphingomyelin synthase, with an IC50 of 4 µM. The structure-activity relationships between DCA and sphingomyelin synthase were evaluated using derivatives and cyclized hongoquercin A. In addition, DCA was found to inhibit amyloid β aggregation. These results may help in the design of effective drugs based on DCA.
Collapse
|
11
|
Lin X, Watanabe K, Kuragano M, Kurotaki Y, Nakanishi U, Tokuraku K. Dietary Intake of Rosmarinic Acid Increases Serum Inhibitory Activity in Amyloid A Aggregation and Suppresses Deposition in the Organs of Mice. Int J Mol Sci 2020; 21:E6031. [PMID: 32825797 PMCID: PMC7504104 DOI: 10.3390/ijms21176031] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 08/11/2020] [Accepted: 08/20/2020] [Indexed: 12/14/2022] Open
Abstract
Serum amyloid A (SAA) is one of the most important precursor amyloid proteins and plays a vital step in AA amyloidosis, although the underlying aggregation mechanism has not been elucidated. Since SAA aggregation is a key step in this pathogenesis, inhibitors are useful to prevent and treat AA amyloidosis, serving as tools to investigate the pathogenic mechanism. In this study, we showed that rosmarinic acid (RA), which is a well-known inhibitor of the aggregation of amyloid β (Aβ), displayed inhibitory activity against SAA aggregation in vitro using a microliter-scale high-throughput screening (MSHTS) system with quantum-dot nanoprobes. Therefore, we evaluated the amyloid aggregation inhibitory activity of blood and the deposition of SAA in organs by feeding mice with Melissa officinalis extract (ME) containing RA as an active substance. Interestingly, the inhibitory activity of ME-fed mice sera for SAA and Aβ aggregation, measured with the MSHTS system, was higher than that of the control group. The amount of amyloid deposition in the organs of ME-fed mice was lower than that in the control group, suggesting that the SAA aggregation inhibitory activity of serum is associated with SAA deposition. These results suggest that dietary intake of RA-containing ME enhanced amyloid aggregation inhibitory activity of blood and suppressed SAA deposition in organs. This study also demonstrated that the MSHTS system could be applied to in vitro screening and to monitor comprehensive activity of metabolized foods adsorbed by blood.
Collapse
Affiliation(s)
- Xuguang Lin
- Graduate School of Engineering, Muroran Institute of Technology, Muroran 050-8585, Japan; (X.L.); (M.K.); (Y.K.); (U.N.)
| | - Kenichi Watanabe
- Department of Veterinary Medicine, Research Center of Global Agromedicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan;
| | - Masahiro Kuragano
- Graduate School of Engineering, Muroran Institute of Technology, Muroran 050-8585, Japan; (X.L.); (M.K.); (Y.K.); (U.N.)
| | - Yukina Kurotaki
- Graduate School of Engineering, Muroran Institute of Technology, Muroran 050-8585, Japan; (X.L.); (M.K.); (Y.K.); (U.N.)
| | - Ushio Nakanishi
- Graduate School of Engineering, Muroran Institute of Technology, Muroran 050-8585, Japan; (X.L.); (M.K.); (Y.K.); (U.N.)
- Yamada Science Foundation, Osaka 544-8666, Japan
| | - Kiyotaka Tokuraku
- Graduate School of Engineering, Muroran Institute of Technology, Muroran 050-8585, Japan; (X.L.); (M.K.); (Y.K.); (U.N.)
| |
Collapse
|
12
|
Kuragano M, Yoshinari W, Lin X, Shimamori K, Uwai K, Tokuraku K. Evaluation of Amyloid β 42 Aggregation Inhibitory Activity of Commercial Dressings by A Microliter-Scale High-Throughput Screening System Using Quantum-Dot Nanoprobes. Foods 2020; 9:foods9060825. [PMID: 32599720 PMCID: PMC7353666 DOI: 10.3390/foods9060825] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 06/20/2020] [Accepted: 06/22/2020] [Indexed: 12/12/2022] Open
Abstract
The aggregation and accumulation of amyloid β (Aβ) in the brain is a trigger of pathogenesis for Alzheimer's disease. Previously, we developed a microliter-scale high-throughput screening (MSHTS) system for Aβ42 aggregation inhibitors using quantum-dot nanoprobes. The MSHTS system is seldom influenced by contaminants in samples and is able to directly evaluate Aβ42 aggregation inhibitory activity of samples containing various compounds. In this study, to elucidate whether the MSHTS system could be applied to the evaluation of processed foods, we examined Aβ42 aggregation inhibitory activity of salad dressings, including soy sauces. We estimated the 50% effective concentration (EC50) from serial diluted dressings. Interestingly, all 19 commercial dressings tested showed Aβ42 aggregation inhibitory activity. It was suggested that EC50 differed by as much as 100 times between the dressings with the most (0.065 ± 0.020 v/v%) and least (6.737 ± 5.054 v/v%) inhibitory activity. The highest activity sample is traditional Japanese dressing, soy sauce. It is known that soy sauce is roughly classified into a heat-treated variety and a non-heat-treated variety. We demonstrated that non-heat-treated raw soy sauce exhibited higher Aβ42 aggregation inhibitory activity than heat-treated soy sauce. Herein, we propose that MSHTS system can be applied to processed foods.
Collapse
|
13
|
Three-dimensional real time imaging of amyloid β aggregation on living cells. Sci Rep 2020; 10:9742. [PMID: 32546691 PMCID: PMC7297742 DOI: 10.1038/s41598-020-66129-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Accepted: 05/13/2020] [Indexed: 01/17/2023] Open
Abstract
Alzheimer’s disease (AD) is a progressive disorder of the brain that gradually decreases thinking, memory, and language abilities. The aggregation process of amyloid β (Aβ) is a key step in the expression of its neurocytotoxicity and development of AD because Aβ aggregation and accumulation around neuronal cells induces cell death. However, the molecular mechanism underlying the neurocytotoxicity and cell death by Aβ aggregation has not been clearly elucidated. In this study, we successfully visualized real-time process of Aβ42 aggregation around living cells by applying our established QD imaging method. 3D observations using confocal laser microscopy revealed that Aβ42 preferentially started to aggregate at the region where membrane protrusions frequently formed. Furthermore, we found that inhibition of actin polymerization using cytochalasin D reduced aggregation of Aβ42 on the cell surface. These results indicate that actin polymerization-dependent cell motility is responsible for the promotion of Aβ42 aggregation at the cell periphery. 3D observation also revealed that the aggregates around the cell remained in that location even if cell death occurred, implying that amyloid plaques found in the AD brain grew from the debris of dead cells that accumulated Aβ42 aggregates.
Collapse
|
14
|
Lin X, Galaqin N, Tainaka R, Shimamori K, Kuragano M, Noguchi TQP, Tokuraku K. Real-Time 3D Imaging and Inhibition Analysis of Various Amyloid Aggregations Using Quantum Dots. Int J Mol Sci 2020; 21:E1978. [PMID: 32183170 PMCID: PMC7139405 DOI: 10.3390/ijms21061978] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 03/01/2020] [Accepted: 03/11/2020] [Indexed: 02/07/2023] Open
Abstract
Amyloidosis refers to aggregates of protein that accumulate and are deposited as amyloid fibrils into plaques. When these are detected in organs, they are the main hallmark of Alzheimer's disease, Parkinson's disease, and other related diseases. Recent medical advances have shown that many precursors and proteins can induce amyloidosis even though the mechanism of amyloid aggregation and the relationship of these proteins to amyloidosis remains mostly unclear. In this study, we report the real-time 3D-imaging and inhibition analysis of amyloid β (Aβ), tau, and α-synuclein aggregation utilizing the affinity between quantum dots (QD) and amyloid aggregates. We successfully visualized these amyloid aggregations in real-time using fluorescence microscopy and confocal microscopy simply by adding commercially available QD. The observation by transmission electron microscopy (TEM) showed that QD particles bound to all amyloid fibrils. The 3D-imaging with QD revealed differences between amyloid aggregates composed of different amyloid peptides that could not be detected by TEM. We were also able to quantify the inhibition activities of these proteins by rosmarinic acid, which has high activity for Aβ aggregation, from fluorescence micrographs as half-maximal effective concentrations. These imaging techniques with QD serve as quick, easy, and powerful tools to understand amyloidosis and to discover drugs for therapies.
Collapse
Affiliation(s)
- Xuguang Lin
- Department of Applied Science and Engineering, Muroran Institute of Technology, Muroran 050-8585, Japan; (X.L.); (N.G.); (R.T.); (K.S.); (M.K.)
| | - Nuomin Galaqin
- Department of Applied Science and Engineering, Muroran Institute of Technology, Muroran 050-8585, Japan; (X.L.); (N.G.); (R.T.); (K.S.); (M.K.)
| | - Reina Tainaka
- Department of Applied Science and Engineering, Muroran Institute of Technology, Muroran 050-8585, Japan; (X.L.); (N.G.); (R.T.); (K.S.); (M.K.)
| | - Keiya Shimamori
- Department of Applied Science and Engineering, Muroran Institute of Technology, Muroran 050-8585, Japan; (X.L.); (N.G.); (R.T.); (K.S.); (M.K.)
| | - Masahiro Kuragano
- Department of Applied Science and Engineering, Muroran Institute of Technology, Muroran 050-8585, Japan; (X.L.); (N.G.); (R.T.); (K.S.); (M.K.)
| | - Taro Q. P. Noguchi
- Department of Chemical Science and Engineering, National Institute of Technology, Miyakonojo College, Miyakonojo 885-8567, Japan;
| | - Kiyotaka Tokuraku
- Department of Applied Science and Engineering, Muroran Institute of Technology, Muroran 050-8585, Japan; (X.L.); (N.G.); (R.T.); (K.S.); (M.K.)
| |
Collapse
|
15
|
Deguchi Y, Ito M. Rosmarinic acid in Perilla frutescens and perilla herb analyzed by HPLC. J Nat Med 2020; 74:341-352. [PMID: 31848798 DOI: 10.1007/s11418-019-01367-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 10/25/2019] [Indexed: 10/25/2022]
Abstract
High-quality perilla leaves are defined as those having purple upper and lower surfaces and a pleasant smell. The Japanese Pharmacopoeia specifies the content of essential oils in perilla leaves but not the content of rosmarinic acid. Rosmarinic acid is a common component of Labiatae plants such as shiso (Perilla frutescens Britton var. crispa W. Deane). Rosmarinic acid has been reported to exhibit anti-inflammatory and anti-oxidant activity but the factors affecting the content of rosmarinic acid in plants remain unknown. This study describes a simple and reproducible method for quantifying rosmarinic acid. We elucidated the main causes for the different rosmarinic acid contents of plants by examining various samples of perilla using the proposed method. Significant differences in rosmarinic acid content between varieties and cultivators were observed. The rosmarinic acid content was higher in green perilla compared with red perilla, in wild species compared with cultivated species, and in plants cultivated in outdoor nurseries compared with in indoor nurseries. The proposed quantitative method was used to examine the rosmarinic acid content in a Kampo formula, Hangekobokuto, and was found to be higher in decoctions prepared using the Kouge method compared with the typical preparation method. We examined the chlorophyll and caffeic acid contents of several samples and their relationship with the rosmarinic acid content.
Collapse
Affiliation(s)
- Yuya Deguchi
- Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Yoshidashimoadachi-cho, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Michiho Ito
- Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Yoshidashimoadachi-cho, Sakyo-ku, Kyoto, 606-8501, Japan.
| |
Collapse
|
16
|
Aliyan A, Cook NP, Martí AA. Interrogating Amyloid Aggregates using Fluorescent Probes. Chem Rev 2019; 119:11819-11856. [DOI: 10.1021/acs.chemrev.9b00404] [Citation(s) in RCA: 113] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Amir Aliyan
- Pasargad Institute for Advanced Innovative Solutions (PIAIS), Tehran, Iran 1991633361
- Khatam University, Tehran, Iran 1991633356
| | - Nathan P. Cook
- Department of Chemistry, Williams College, Williamstown, Massachusetts 01267, United States
| | | |
Collapse
|
17
|
Surguchov A, Emamzadeh FN, Surguchev AA. Amyloidosis and Longevity: A Lesson from Plants. BIOLOGY 2019; 8:biology8020043. [PMID: 31137746 PMCID: PMC6628237 DOI: 10.3390/biology8020043] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 05/16/2019] [Accepted: 05/22/2019] [Indexed: 12/16/2022]
Abstract
The variety of lifespans of different organisms in nature is amazing. Although it is acknowledged that the longevity is determined by a complex interaction between hereditary and environmental factors, many questions about factors defining lifespan remain open. One of them concerns a wide range of lifespans of different organisms. The reason for the longevity of certain trees, which reaches a thousand years and exceeds the lifespan of most long living vertebrates by a huge margin is also not completely understood. Here we have discussed some distinguishing characteristics of plants, which may explain their remarkable longevity. Among them are the absence (or very low abundance) of intracellular inclusions composed of amyloidogenic proteins, the lack of certain groups of proteins prone to aggregate and form amyloids in animals, and the high level of compounds which inhibit protein aggregation and possess antiaging properties.
Collapse
Affiliation(s)
- Andrei Surguchov
- Department of Neurology, University of Kansas Medical Center, Kansas City, KS 66160, USA.
| | - Fatemeh Nouri Emamzadeh
- Division of Biomedical and Life Sciences, Faculty of Health and Medicine, University of Lancaster, Lancaster LA1 4AY, UK.
| | - Alexei A Surguchev
- Section of Otolaryngology, Department of Surgery, Yale School of Medicine, Yale University, New Haven, CT 06520, USA.
| |
Collapse
|
18
|
Sasaki R, Tainaka R, Ando Y, Hashi Y, Deepak HV, Suga Y, Murai Y, Anetai M, Monde K, Ohta K, Ito I, Kikuchi H, Oshima Y, Endo Y, Nakao H, Sakono M, Uwai K, Tokuraku K. An automated microliter-scale high-throughput screening system (MSHTS) for real-time monitoring of protein aggregation using quantum-dot nanoprobes. Sci Rep 2019; 9:2587. [PMID: 30796247 PMCID: PMC6384891 DOI: 10.1038/s41598-019-38958-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 01/11/2019] [Indexed: 12/31/2022] Open
Abstract
Protein aggregation is the principal component of numerous protein misfolding pathologies termed proteinopathies, such as Alzheimer’s disease, Parkinson’s disease, prion disease, and AA amyloidosis with unmet treatment needs. Protein aggregation inhibitors have great potential for the prevention and treatment of proteinopathies. Here we report the development of an automated real-time microliter-scale high throughput screening (MSHTS) system for amyloid aggregation inhibitors using quantum-dot nanoprobes. Screening 504 crude extracts and 134 low molecular weight aromatic compounds revealed the relationship of amyloid-β (Aβ) aggregation inhibitory activities of plant extracts using a plant-based classification. Within the eudicots, rosids, Geraniales and Myrtales showed higher activity. Screening low molecular weight aromatic compounds demonstrated that the structure of tropolone endows it with potential Aβ aggregation inhibitory activity. The activity of the most active tropolone derivative was higher than that of rosmarinic acid. MSHTS also identified three chaperone molecules as tau aggregation inhibitors. These results demonstrate that our automated MSHTS system is a novel and robust tool that can be adapted to a wide range of compounds and aggregation-prone polypeptides.
Collapse
Affiliation(s)
- Rina Sasaki
- Graduate School of Engineering, Muroran Institute of Technology, Muroran, Hokkaido, Japan
| | - Reina Tainaka
- Graduate School of Engineering, Muroran Institute of Technology, Muroran, Hokkaido, Japan
| | - Yuichi Ando
- Graduate School of Engineering, Muroran Institute of Technology, Muroran, Hokkaido, Japan
| | - Yurika Hashi
- Graduate School of Engineering, Muroran Institute of Technology, Muroran, Hokkaido, Japan.,Yamano College of Aesthetics, Hachioji, Tokyo, Japan
| | - Hadya V Deepak
- Frontier Research Center for Advanced Material and Life Science, Faculty of Advanced Life Science, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Yoshiko Suga
- Frontier Research Center for Advanced Material and Life Science, Faculty of Advanced Life Science, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Yuta Murai
- Frontier Research Center for Advanced Material and Life Science, Faculty of Advanced Life Science, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Masaki Anetai
- Frontier Research Center for Advanced Material and Life Science, Faculty of Advanced Life Science, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Kenji Monde
- Frontier Research Center for Advanced Material and Life Science, Faculty of Advanced Life Science, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Kiminori Ohta
- Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Miyagi, Japan.,School of Pharmacy, Showa University, Tokyo, Japan
| | - Ikuko Ito
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Miyagi, Japan
| | - Haruhisa Kikuchi
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Miyagi, Japan
| | - Yoshiteru Oshima
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Miyagi, Japan
| | - Yasuyuki Endo
- Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Miyagi, Japan
| | - Hitomi Nakao
- Graduate School of Science and Engineering, University of Toyama, Toyama, Japan
| | - Masafumi Sakono
- Graduate School of Science and Engineering, University of Toyama, Toyama, Japan
| | - Koji Uwai
- Graduate School of Engineering, Muroran Institute of Technology, Muroran, Hokkaido, Japan
| | - Kiyotaka Tokuraku
- Graduate School of Engineering, Muroran Institute of Technology, Muroran, Hokkaido, Japan.
| |
Collapse
|
19
|
Mohammad-Beigi H, Kjaer L, Eskandari H, Aliakbari F, Christiansen G, Ruvo G, Ward JL, Otzen DE. A Possible Connection Between Plant Longevity and the Absence of Protein Fibrillation: Basis for Identifying Aggregation Inhibitors in Plants. FRONTIERS IN PLANT SCIENCE 2019; 10:148. [PMID: 30815009 PMCID: PMC6381023 DOI: 10.3389/fpls.2019.00148] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 01/28/2019] [Indexed: 05/08/2023]
Abstract
The ability of proteins to aggregate to form well-organized β-sheet rich amyloid fibrils is increasingly viewed as a general if regrettable property of the polypeptide chain. Aggregation leads to diseases such as amyloidosis and neurodegeneration in humans and various mammalian species but is also found in a functional variety in both animals and microbes. However, there are to our knowledge no reports of amyloid formation in plants. Plants are also the source of a large number of aggregation-inhibiting compounds. We reasoned that the two phenomena could be connected and that one of (many) preconditions for plant longevity is the ability to suppress unwanted protein aggregation. In support of this, we show that while protein extracts from the sugar maple tree Acer saccharum fibrillate readily on their own, this process is efficiently abolished by addition of small molecule extracts from the same plant. Further analysis of 44 plants showed a correlation between plant longevity and ability to inhibit protein aggregation. Extracts from the best performing plant, the sugar maple, were subjected to chromatographic fractionation, leading to the identification of a large number of compounds, many of which were shown to inhibit aggregation in vitro. One cautious interpretation is that it may have been advantageous for plants to maintain an efficient collection of aggregation-inhibiting metabolites as long as they do not impair metabolite function. From a practical perspective, our results indicate that long-lived plants may be particularly appropriate sources of new anti-aggregation compounds with therapeutic potential.
Collapse
Affiliation(s)
| | - Lars Kjaer
- Interdisciplinary Nanoscience Centre (iNANO), Aarhus University, Aarhus, Denmark
| | - Hoda Eskandari
- Interdisciplinary Nanoscience Centre (iNANO), Aarhus University, Aarhus, Denmark
| | - Farhang Aliakbari
- Department of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
| | - Gunna Christiansen
- Department of Biomedicine-Medical Microbiology and Immunology, Aarhus University, Aarhus, Denmark
| | - Gianluca Ruvo
- Computational and Analytical Sciences Department, Rothamsted Research, Harpenden, United Kingdom
| | - Jane L. Ward
- Computational and Analytical Sciences Department, Rothamsted Research, Harpenden, United Kingdom
| | - Daniel Erik Otzen
- Interdisciplinary Nanoscience Centre (iNANO), Aarhus University, Aarhus, Denmark
- Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
- *Correspondence: Daniel Erik Otzen,
| |
Collapse
|
20
|
Tang M, Pi J, Long Y, Huang N, Cheng Y, Zheng H. Quantum dots-based sandwich immunoassay for sensitive detection of Alzheimer's disease-related Aβ 1-42. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 201:82-87. [PMID: 29734108 DOI: 10.1016/j.saa.2018.04.060] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 04/12/2018] [Accepted: 04/29/2018] [Indexed: 05/24/2023]
Abstract
Amyloid-beta peptide 1-42 (Aβ1-42) is known as a component of amyloid plaques in association with Alzheimer's disease. Herein, we developed a reliable and remarkably sensitive sandwich immunoassay to detect the Aβ1-42 using quantum dots (QDs) as fluorescent label. In the presence of Aβ1-42, the biotinylated Anti-beta Amyloid 1-16 (N-Ab) recognized the target and formed C-Ab-Aβ1-42-N-Ab sandwich immunocomplexes. Then Streptavidin-QDs conjugated to biotinylated N-Ab and the concentration of Aβ1-42 was determined by detecting the fluorescence intensity in the supernatant. This method is faster and more efficient than the previous approach we reported. It also has reasonable sensitivity and selectivity. Under the optimized conditions, the linear range is 5.0 to 100 pM (0.023-0.45 ng/mL) and the detection limit is 1.7 pM (7.6 pg/ mL). In addition, this method has been successfully applied to detect the Aβ1-42 in human cerebrospinal fluid sample.
Collapse
Affiliation(s)
- Menghuan Tang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Jiangli Pi
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Yijuan Long
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Ning Huang
- Department of Neurosurgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, PR China
| | - Yuan Cheng
- Department of Neurosurgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, PR China
| | - Huzhi Zheng
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
| |
Collapse
|
21
|
Taguchi R, Hatayama K, Takahashi T, Hayashi T, Sato Y, Sato D, Ohta K, Nakano H, Seki C, Endo Y, Tokuraku K, Uwai K. Structure-activity relations of rosmarinic acid derivatives for the amyloid β aggregation inhibition and antioxidant properties. Eur J Med Chem 2017; 138:1066-1075. [PMID: 28759879 DOI: 10.1016/j.ejmech.2017.07.026] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 06/20/2017] [Accepted: 07/16/2017] [Indexed: 12/19/2022]
Abstract
Amyloid-β aggregation inhibitors are expected to be therapeutic or prophylactic agents for Alzheimer's disease. Rosmarinic acid, which is one of the main aggregation inhibitors derived from Lamiaceae, was employed as a lead compound and its 25 derivatives were synthesized. In this study, the structure-activity relations of rosmarinic acid derivatives for the amyloid-β aggregation inhibitory effect (MSHTS assay), antioxidant properties, and xanthine oxidase inhibition were evaluated. Among the tested compounds, compounds 16d and 19 were found to the most potent amyloid aggregation inhibitors. The SAR revealed that the necessity of the presence of the phenolic hydroxyl on one side of the molecule as well as the lipophilicity of the entire molecule. The importance of these structural properties was also supported by docking simulations.
Collapse
Affiliation(s)
- Riho Taguchi
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology, 27-1 Mizumoto, Muroran 050-8585, Japan
| | - Koki Hatayama
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology, 27-1 Mizumoto, Muroran 050-8585, Japan
| | - Tomohito Takahashi
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology, 27-1 Mizumoto, Muroran 050-8585, Japan
| | - Takafumi Hayashi
- Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Yuki Sato
- Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Daisuke Sato
- Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Kiminori Ohta
- Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Hiroto Nakano
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology, 27-1 Mizumoto, Muroran 050-8585, Japan
| | - Chigusa Seki
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology, 27-1 Mizumoto, Muroran 050-8585, Japan
| | - Yasuyuki Endo
- Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Kiyotaka Tokuraku
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology, 27-1 Mizumoto, Muroran 050-8585, Japan
| | - Koji Uwai
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology, 27-1 Mizumoto, Muroran 050-8585, Japan.
| |
Collapse
|
22
|
Quan L, Wu J, Lane LA, Wang J, Lu Q, Gu Z, Wang Y. Enhanced Detection Specificity and Sensitivity of Alzheimer’s Disease Using Amyloid-β-Targeted Quantum Dots. Bioconjug Chem 2016; 27:809-14. [DOI: 10.1021/acs.bioconjchem.6b00019] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Li Quan
- Department
of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Jiangxiao Wu
- Department
of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Lucas A. Lane
- Department
of Biomedical Engineering, Emory University and Georgia Institute of Technology, Atlanta, Georgia 30322, United States
| | - Jianquan Wang
- Department
of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Qian Lu
- Department
of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Zheng Gu
- Department
of Biomedical Engineering, Emory University and Georgia Institute of Technology, Atlanta, Georgia 30322, United States
| | - Yiqing Wang
- Department
of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu 210093, China
- Department
of Biomedical Engineering, Emory University and Georgia Institute of Technology, Atlanta, Georgia 30322, United States
| |
Collapse
|
23
|
Radko SP, Khmeleva SA, Suprun EV, Kozin SA, Bodoev NV, Makarov AA, Archakov AI, Shumyantseva VV. [Physico-chemical methods for studing β-amyloid aggregation]. BIOMEDIT︠S︡INSKAI︠A︡ KHIMII︠A︡ 2015; 61:203-18. [PMID: 25978387 DOI: 10.18097/pbmc20156102203] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Alzheimer's disease is the most prevalent neurodegenerative pathology. According to the amyloid cascade hypothesis, a key event of the Alzheimer's disease pathogenesis is a transition of the β-amyloid peptide (Аβ) from the monomeric form to the aggregated state. The mechanism of Аβ aggregation is intensively studied in vitro, by means of synthetic peptides and various physico-chemical methods allowing evaluation of size, molecular structure, and morphology of the formed aggregates. The paper reviews both the well-known and recently introduced physico-chemical methods for analysis of Аβ aggregation, including microscopу, optical and fluorescent methods, method of electron paramagnetic resonance, electrochemical and electrophoretic methods, gel-filtration, and mass spectrometric methods. Merits and drawbacks of the methods are discussed. The unique possibility to simultaneously observe Аβ monomers as well oligomers and large aggregates by means of atomic force microscopy or fluorescence correlation spectroscopy is emphasized. The high detection sensitivity of the latter method, monitoring the aggregation process in Аβ solutions at low peptide concentrations is underlined. Among mass spectrometric methods, the ion mobility mass spectrometry is marked out as a method enabling to obtain information about both the spectrum of Аβ oligomers and their structure. It is pointed out that the use of several methods giving the complementary data about Аβ aggregates is the best experimental approach to studying the process of b-amyloid peptide aggregation in vitro.
Collapse
Affiliation(s)
- S P Radko
- Institute of Biomedical Chemistry, Moscow, Russia; Engelhardt Institute of Molecular Biology, Moscow, Russia
| | - S A Khmeleva
- Institute of Biomedical Chemistry, Moscow, Russia
| | - E V Suprun
- Institute of Biomedical Chemistry, Moscow, Russia
| | - S A Kozin
- Engelhardt Institute of Molecular Biology, Moscow, Russia
| | - N V Bodoev
- Institute of Biomedical Chemistry, Moscow, Russia
| | - A A Makarov
- Engelhardt Institute of Molecular Biology, Moscow, Russia
| | - A I Archakov
- Institute of Biomedical Chemistry, Moscow, Russia
| | | |
Collapse
|
24
|
Radko SP, Khmeleva SA, Suprun EV, Kozin SA, Bodoev NV, Makarov AA, Archakov AI, Shumyantseva VV. Physico-chemical methods for studying amyloid-β aggregation. BIOCHEMISTRY MOSCOW-SUPPLEMENT SERIES B-BIOMEDICAL CHEMISTRY 2015. [DOI: 10.1134/s1990750815030075] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
25
|
Abstract
CONTEXT Satureja (Lamiaceae) species are used as flavoring compounds in food, pharmaceutical, and cosmetic industries because of its sweetness and simple cultivation characteristics. They have traditionally been used as muscle pain relievers, tonic, and carminative agents to treat stomach and intestinal disorders such as cramps, nausea, indigestion, and diarrhea, due to their considerable phytochemical characteristics. OBJECTIVE This review evaluates some information published since 1989 on Satureja genus from a systematic perspective in terms of its pharmacological and phytochemical characteristics. MATERIALS AND METHODS Web of Science, PubMed, Scopus, and Google Scholar databases were searched up to March 2014. "Satureja" was used as a research term without narrowing or limiting research elements. After obtaining all reports from database (a total number is about 637), the papers were carefully analyzed in order to find data related to the topic of this review. RESULTS In this review, 453 reports were used which were published between 1989 and 2014. The study was compiled into two sections (Pharmacology and Phytochemistry). In the pharmacology section, more than 50 different activities were studied. In the second section, in addition to other compounds and inorganic substances, volatiles, phenolic acids, and flavonoids were discussed. DISCUSSION AND CONCLUSION According to our contemporary information, Satureja species have been evaluated for their wide range of biological activities. However, a small part of these studies have been carried out on the active principles. Therefore, in the future, more studies should be carried out to identify responsible phytochemicals for the various activities.
Collapse
Affiliation(s)
- Bektas Tepe
- a Department of Molecular Biology and Genetics, Faculty of Science and Literature , Kilis 7 Aralik University , Kilis , Turkey and
| | - Mustafa Cilkiz
- b Department of Biology, Faculty of Science and Literature , Gaziantep University , Gaziantep , Turkey
| |
Collapse
|
26
|
Ogara T, Takahashi T, Yasui H, Uwai K, Tokuraku K. Evaluation of the effects of amyloid β aggregation from seaweed extracts by a microliter-scale high-throughput screening system with a quantum dot nanoprobe. J Biosci Bioeng 2014; 120:45-50. [PMID: 25534595 DOI: 10.1016/j.jbiosc.2014.11.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 11/05/2014] [Accepted: 11/19/2014] [Indexed: 11/16/2022]
Abstract
Inhibitors of amyloid β (Aβ) aggregation have the potential to serve as lead compounds for anti-Alzheimer's disease (AD) agents because Aβ aggregation is a key step in AD pathogenesis. Recently, we developed a novel microliter-scale high-throughput screening (MSHTS) system for Aβ aggregation inhibitors that applied fluorescence microscopic analysis with quantum dot nanoprobes, and attempted to comprehensively screen the inhibitors from spices using this system (Ishigaki et al., PLoS One, 8, e72992, 2013). In this study, we tried to evaluate the inhibitory activities of 11 seaweed extracts on Aβ aggregation using the MSHTS system. The half-maximal effective concentration (EC50) of the ethanolic extracts from all seaweeds exceeded 4.9 mg/ml, indicating that the extracts inhibit Aβ aggregation although this activity was significantly lower than that displayed by members of the Lamiaceae, a family of herbal spices that showed highest activity among 52 spices tested in our 2013 study. On the other hand, the EC50 of boiling water extracts was 0.013-0.42 mg/ml which was comparable with the EC50 of the extracts from the Lamiaceae family. These results suggest that the extraction efficiency of the inhibitors by boiling water extraction was higher than that by ethanolic extraction. Moreover, analysis of fluorescence micrographs, which were obtained from the MSHTS system, revealed that the morphology of the Aβ aggregates coincubated with boiling water extracts differed from control aggregates, suggesting that the MSHTS system is also useful for screening substances that affect the morphology of aggregates.
Collapse
Affiliation(s)
- Toshiki Ogara
- Department of Applied Sciences, Muroran Institute of Technology, 27-1 Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan
| | - Tomohito Takahashi
- Department of Applied Sciences, Muroran Institute of Technology, 27-1 Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan
| | - Hajime Yasui
- Laboratory of Marine Industrial Science and Technology, Faculty of Fisheries Sciences, Hokkaido University, Hakodate, Hokkaido 041-8611, Japan
| | - Koji Uwai
- Department of Applied Sciences, Muroran Institute of Technology, 27-1 Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan
| | - Kiyotaka Tokuraku
- Department of Applied Sciences, Muroran Institute of Technology, 27-1 Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan.
| |
Collapse
|