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Warerkar OD, Mudliar NH, Ahuja T, Shahane SD, Singh PK. A highly sensitive hemicyanine-based near-infrared fluorescence sensor for detecting toxic amyloid aggregates in human serum. Int J Biol Macromol 2023; 247:125621. [PMID: 37392920 DOI: 10.1016/j.ijbiomac.2023.125621] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 06/14/2023] [Accepted: 06/28/2023] [Indexed: 07/03/2023]
Abstract
The development of an accurate and sensitive sensor for detecting amyloid plaques, which are responsible for many protein disorders like Alzheimer's disease, is crucial for early diagnosis. Recently, there has been a notable increase in the development of fluorescence probes that exhibit emission in the red region (>600 nm), aiming to effectively tackle the challenges encountered when working with complex biological matrices. In the current investigation, a hemicyanine-based probe, called LDS730, has been used for the sensing of amyloid fibrils, which belong to the Near-Infrared Fluorescence (NIRF) family of dyes. NIRF probes provide higher precision in detection, prevent photo-damage, and minimize the autofluorescence of biological specimens. The LDS730 sensor emits in the near-infrared region and shows a 110-fold increase in fluorescence turn-on emission when bound to insulin fibrils, making it a highly sensitive sensor. The sensor has an emission maximum of ~710 nm in a fibril-bound state, which shows a significant red shift along with a Stokes' shift of ~50 nm. The LDS730 sensor also displays excellent performance in the complicated human serum matrix, with a limit of detection (LOD) of 103 nM. Molecular docking calculations suggest that the most likely binding location of LDS730 in the fibrillar structure is the inner channels of amyloid fibrils along its long axis, and the sensor engages in several types of hydrophobic interactions with neighboring amino acid residues of the fibrillar structure. Overall, this new amyloid sensor has great potential for the early detection of amyloid plaques and for improving diagnostic accuracy.
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Affiliation(s)
- Oshin D Warerkar
- SVKM's Shri C. B. Patel Research Centre, Vile Parle, Mumbai, Maharashtra 400056, India
| | - Niyati H Mudliar
- SVKM's Shri C. B. Patel Research Centre, Vile Parle, Mumbai, Maharashtra 400056, India
| | - Tanya Ahuja
- SVKM's Shri C. B. Patel Research Centre, Vile Parle, Mumbai, Maharashtra 400056, India
| | - Sailee D Shahane
- SVKM's Shri C. B. Patel Research Centre, Vile Parle, Mumbai, Maharashtra 400056, India
| | - Prabhat K Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India.
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2
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A Near Infra-red Emitting Supramolecular Dye-Polymer Assembly as Promising Platform for Protamine Sensing. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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3
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Chakraborty G. Red emitting fluorogenic dye as an efficient turn-on probe for milk allergen. Int J Biol Macromol 2022; 221:1527-1535. [PMID: 36122782 DOI: 10.1016/j.ijbiomac.2022.09.130] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 09/14/2022] [Accepted: 09/14/2022] [Indexed: 11/24/2022]
Abstract
Development of simple, fast and non-destructive technique such as fluorescence based method for the quantification of milk allergens in various dairy products is a highly rewarding task. In this contribution, a red emitting fluorogenic dye, quinaldine red (QR) is reported for the detection and quantification of a milk allergen, beta lactoglobulin (β-LG) in milk and whey matrices, utilizing its high selectivity and sensitivity towards β-LG. Detail spectroscopic investigation reveals that binding of QR to the hydrophobic calyx site of β-LG protein substantially reduces the torsional agility and propensity of TICT state formation of QR, rendering the dye highly fluorescent in nature. This enables estimation of β-LG with LOD 52.1(±0.9) nM in buffer solution and 0.21(±0.01) μM in 5 % bovine milk matrix respectively. Additionally, high selectivity and sensitivity, excellent repeatability, quick response, and emission in the biologically favorable red spectral region make QR based fluorometric quantification of β-LG a highly attractive choice. Finally, the estimated β-LG concentrations in milk and whey matrices from fluorometric titration and densitometry methods are found to match excellently with each other, suggesting potential of QR as an efficient turn-on fluorescent probe for the quantification of β-LG (milk allergen) in various dairy products.
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Affiliation(s)
- Goutam Chakraborty
- Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
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4
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Photophysical Study of Styryl Derivatives with Macrocyclic Host and the Effect of Addition of Cholesterol and Neurotransmitter. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.113842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Warerkar OD, Mudliar NH, Singh PK. A hemicyanine based fluorescence turn-on sensor for amyloid fibril detection in the far-red region. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115322] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Udayan S, Sherin DR, Vijaykumar S, Manojkumar TK, Nampoori VPN, Thomas S. Exploring the LDS 821 dye as a potential NIR probe for the two photon imaging of amyloid fibrils. Biomater Sci 2020; 8:6082-6092. [PMID: 33000782 DOI: 10.1039/d0bm00548g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
We report a commercially available benzothiazolium based dye LDS 821 (Styryl 9M) as a near infrared fluorescent probe for the detection of lysozyme amyloid fibrils. Change in the photophysical properties of the dye with respect to the change in viscosity of the environment is investigated. Increment in fluorescence lifetime and quantum yield with increment in viscosity proves the dye as a molecular rotor. The dye, upon binding with lysozyme fibrils, exhibits a red shift in the absorption spectrum with increased quantum yield. Strong fluorescence emission near the biological window as compared with Thioflavin T makes the LDS 821 dye a potential probe for imaging amyloid fibrils in vivo. Molecular docking studies were carried out to understand the mode of interaction between the dye and amyloid fibrils. Nonlinear optical properties of the dye upon incorporation with amyloid fibrils were explored, and they show a sizeable enhancement in two photon absorption with an increase in the concentration of amyloid fibrils. The findings suggest that the nonlinear optical absorption of the LDS 821 dye can be used as an alternative marker for amyloid fibrils.
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Affiliation(s)
- Sony Udayan
- International School of photonics, Cochin University of Science and Technology, Cochin, Kerala, India.
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7
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Chakraborty G, Ray AK, Singh PK, Pal H. Does the degree of substitution on the cyclodextrin hosts impact their affinity towards guest binding? Photochem Photobiol Sci 2020; 19:956-965. [DOI: 10.1039/d0pp00103a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The degree of substitution on βCD rims by sulfobutylether groups significantly modulates the binding affinity of the SBEnβCD hosts for the studied cationic guest molecule.
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Affiliation(s)
- Goutam Chakraborty
- Laser and Plasma Technology Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - Alok K. Ray
- Laser and Plasma Technology Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
- Homi Bhabha National Institute
| | - Prabhat K. Singh
- Homi Bhabha National Institute
- Mumbai-400094
- India
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
| | - Haridas Pal
- Homi Bhabha National Institute
- Mumbai-400094
- India
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
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Ditmangklo B, Taechalertpaisarn J, Siriwong K, Vilaivan T. Clickable styryl dyes for fluorescence labeling of pyrrolidinyl PNA probes for the detection of base mutations in DNA. Org Biomol Chem 2019; 17:9712-9725. [PMID: 31531484 DOI: 10.1039/c9ob01492f] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Fluorescent hybridization probes are important tools for rapid, specific and sensitive analysis of genetic mutations. In this work, we synthesized novel alkyne-modified styryl dyes for conjugation with pyrrolidinyl peptide nucleic acid (acpcPNA) by click chemistry for the development of hybridization responsive fluorescent PNA probes. The free styryl dyes generally exhibited weak fluorescence in aqueous media, and the fluorescence was significantly enhanced (up to 125-fold) upon binding with DNA duplexes. Selected styryl dyes that showed good responses with DNA were conjugated with PNA via sequential reductive alkylation-click chemistry. Although these probes showed little fluorescence change when hybridized to complementary DNA, significant fluorescence enhancements were observed in the presence of structural defects including mismatched, abasic and base-inserted DNA targets. The largest increase in fluorescence quantum yield (up to 14.5-fold) was achieved with DNA carrying base insertion. Although a number of probes were designed to give fluorescence response to complementary DNA targets, probes that are responsive to mutations such as single nucleotide polymorphism (SNP), base insertion/deletion and abasic site are less common. Therefore, styryl-dye-labeled acpcPNA is a unique probe that is responsive to structural defects in the duplexes that may be further applied for diagnostic purposes.
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Affiliation(s)
- Boonsong Ditmangklo
- Organic Synthesis Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Patumwan, Bangkok 10330, Thailand.
| | - Jaru Taechalertpaisarn
- Organic Synthesis Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Patumwan, Bangkok 10330, Thailand. and National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency, Pathumthani 12120, Thailand
| | - Khatcharin Siriwong
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Tirayut Vilaivan
- Organic Synthesis Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Patumwan, Bangkok 10330, Thailand.
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Mudliar NH, Singh PK. A molecular rotor-based turn-on sensor probe for amyloid fibrils in the extreme near-infrared region. Chem Commun (Camb) 2019; 55:3907-3910. [DOI: 10.1039/c9cc01262a] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient fluorescence turn-on probe for amyloid detection in the extreme near-infrared region (>750 nm) with an exceptional red-shift in the absorption maxima is reported.
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Affiliation(s)
| | - Prabhat K. Singh
- Homi Bhabha National Institute
- Training School Complex
- Mumbai 400094
- India
- Radiation & Photochemistry Division
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Chakraborty G, Ray AK, Singh PK, Pal H. A styryl based fluorogenic probe with high affinity for a cyclodextrin derivative. Org Biomol Chem 2019; 17:6895-6904. [DOI: 10.1039/c9ob01349k] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A styryl-based fluorogenic near-IR probe registers a very high association constant with sulfobutylether substituted β-cyclodextrin host, having prospects as biological marker and improved pH and temperature sensor.
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Affiliation(s)
- Goutam Chakraborty
- Laser and Plasma Technology Division
- Bhabha Atomic Research Centre
- Mumbai 400085
- India
- Homi Bhabha National Institute
| | - Alok K. Ray
- Laser and Plasma Technology Division
- Bhabha Atomic Research Centre
- Mumbai 400085
- India
- Homi Bhabha National Institute
| | - Prabhat K. Singh
- Homi Bhabha National Institute
- Mumbai 400094
- India
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
| | - Haridas Pal
- Homi Bhabha National Institute
- Mumbai 400094
- India
- Analytical Chemistry Division
- Bhabha Atomic Research Centre
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11
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Doan H, Castillo M, Bejjani M, Nurekeyev Z, Dzyuba SV, Gryczynski I, Gryczynski Z, Raut S. Solvatochromic dye LDS 798 as microviscosity and pH probe. Phys Chem Chem Phys 2018; 19:29934-29939. [PMID: 29090298 DOI: 10.1039/c7cp05874h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Styryl dyes, specifically LDS group dyes, are known solvatochromic and electrochromic probes for monitoring mitochondrial potential in cellular environments. However, the ability of these dyes to respond to fluctuations in viscosity, pH and temperature has not been established. In this study, we demonstrated that LDS 798 (also known as Styryl-11) can sense environmental viscosity (via fluorescence lifetime changes) as well as pH changes (ratiometric intensity change) in the absence of polarity variations. Polarity changes can be probed by spectral changes using LDS 798. Therefore, all properties of the media should be considered, when these types of dyes are used as electrochromic/solvatochromic sensors in cellular environments.
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Affiliation(s)
- Hung Doan
- Department of Physics and Astronomy, Texas Christian University, Fort Worth, TX 76129, USA.
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12
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Chakraborty G, Ray AK, Singh PK, Pal H. A highly fluorescent turn-on probe in the near-infrared region for albumin quantification in serum matrix. Chem Commun (Camb) 2018; 54:8383-8386. [DOI: 10.1039/c8cc05058a] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A commercially available styryl based fluorophore in the near-IR region shows exceptional turn-on emission for serum albumins.
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Affiliation(s)
- Goutam Chakraborty
- Laser & Plasma Technology Division
- Bhabha Atomic Research Centre
- Mumbai 400085
- India
- Homi Bhabha National Institute
| | - Alok K. Ray
- Laser & Plasma Technology Division
- Bhabha Atomic Research Centre
- Mumbai 400085
- India
- Homi Bhabha National Institute
| | - Prabhat K. Singh
- Homi Bhabha National Institute
- Training School Complex
- Anushaktinagar
- Mumbai 400094
- India
| | - Haridas Pal
- Homi Bhabha National Institute
- Training School Complex
- Anushaktinagar
- Mumbai 400094
- India
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13
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Nagy M, Rácz D, Lázár L, Purgel M, Ditrói T, Zsuga M, Kéki S. Solvatochromic study of highly fluorescent alkylated isocyanonaphthalenes, their π-stacking, hydrogen-bonding complexation, and quenching with pyridine. Chemphyschem 2014; 15:3614-25. [PMID: 25167957 DOI: 10.1002/cphc.201402310] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Indexed: 02/03/2023]
Abstract
Mono- and dialkylated derivatives of 1-amino-5-isocyanonaphthalene (ICAN) were studied as new members of a multifunctional, easy-to-prepare fluorophore family, which showed excellent solvatochromic properties. The monoallyl derivative and the starting ICAN exhibited strong fluorescence quenching in the presence of small amounts of pyridine. The formation of a hydrogen-bonded ground-state pyridine complex was detected; however, analysis of quantum chemical calculations suggested the presence of an additional π-stacked pyridine complex. The Stern-Volmer plot of the quenching process exhibited a downward curvature and after reaching a minimum the fluorescence intensity increased back to a significant level at high pyridine concentrations. Significant fluorescence was observed even in pure pyridine. A new mechanism and a simple mathematical equation were derived to explain the downward curvature and the remaining fluorescence by the formation of a fluorescent π-stacked complex.
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Affiliation(s)
- Miklós Nagy
- Department of Applied Chemistry, University of Debrecen, 4032 Debrecen, Egyetem tér 1 (Hungary), Fax: (+36) 52-518662
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