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Shamsi E, Parvin P, Ahmadinouri F, Khazai S. Laser-induced fluorescence spectroscopy of plant-based drugs: Opium and hashish provoking at 405 nm. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 302:123055. [PMID: 37390713 DOI: 10.1016/j.saa.2023.123055] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 06/13/2023] [Accepted: 06/19/2023] [Indexed: 07/02/2023]
Abstract
Here, the fluorescence properties of some plant-based drug samples are characterized using a coherent excitation source at 405 nm. The laser-induced fluorescence (LIF) spectroscopy is examined to analyze opium and hashish. In order to improve traditional fluorescence methods for better analysis of optically dense materials, we have proposed five characteristic parameters based on solvent densitometry assay as the fingerprints of drugs of interest. The signal emissions are recorded in terms of various drug concentrations, such that the best fitting over experimental data determines the fluorescence extinction (α) and self-quenching (k) coefficients according to the modified Beer-Lambert formalism. The typical α value is determined to be 0.30 and 0.15 mL/(cm∙mg) for opium and hashish, respectively. Similarly, typical k is obtained 0.390 and 1.25 mL/(cm∙mg), respectively. Furthermore, the concentration at max fluorescence intensity (Cp) is determined for opium and hashish to be 1.8 and 1.3 mg/mL, respectively. Results reveal that opium and hashish benefit their own characteristic fluorescence parameters to discriminate those illicit substances promptly using the present method.
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Affiliation(s)
- Ehsan Shamsi
- Physics Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
| | - Parviz Parvin
- Physics Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran.
| | - Fatemeh Ahmadinouri
- Physics Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
| | - Samaneh Khazai
- Physics Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
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2
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Qu B, Xue J, Luo Y. Self-assembled caseinate-laponite® nanocomposites for curcumin delivery. Food Chem 2021; 363:130338. [PMID: 34161872 DOI: 10.1016/j.foodchem.2021.130338] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 05/12/2021] [Accepted: 06/05/2021] [Indexed: 01/10/2023]
Abstract
In this study, novel self-assembled protein-clay nanocomposites were developed for curcumin delivery. Experimentally, curcumin was dissolved and deprotonated in sodium caseinate-laponite® (NaCas-LAP) dispersion at pH 12.0 for 30 min followed by neutralization to pH = 7. Due to the pH-mediated dissociation and re-association process, curcumin was successfully encapsulated into NaCas-LAP nanocomposites. The colloidal properties and encapsulation capabilities of NaCas-LAP nanocomposites were investigated, including particle size, zeta potential, encapsulation efficiency, release profile in simulated gastrointestinal tract, as well as nanoscale morphology. The results indicated that upon neutralization, NaCas-LAP nanocomposites were re-associated into smaller particles due to strong hydrophobic interactions among NaCas, LAP and curcumin. Specifically, 0.10% curcumin loaded nanocomposites prepared with 2% NaCas and 0.5% LAP showed improved encapsulation performance (73.4%) with smaller particle size (100 nm). The as-prepared protein-clay nanocomposites hold promising potential to deliver lipophilic bioactive compounds, such as curcumin.
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Affiliation(s)
- Bai Qu
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA
| | - Jingyi Xue
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA
| | - Yangchao Luo
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA.
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3
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Seyedi S, Parvin P, Jafargholi A, Abbasian A, Mehdinejad M, Khorrami A, Mehrabi M, Moafi A. Fluorescence emission quenching of RdB fluorophores in attendance of various blood type RBCs based on Stern-Volmer formalism. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 248:119237. [PMID: 33307349 DOI: 10.1016/j.saa.2020.119237] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 11/09/2020] [Accepted: 11/14/2020] [Indexed: 06/12/2023]
Abstract
In this work, the optical properties of Rhodamine B (RdB) are investigated in the attendance of various red blood cells (RBCs). RdB fluorophores, as biological markers, is excited using SHG-CW Nd:YAG laser at 532 nm. In fact, the addition of biomolecules of interest to the reference fluorophore notably changes the fluorescence properties of the suspension. Here, laser induced fluorescence (LIF) spectrophotometry based on Stern-Volmer quenching formalism and field emission scanning electron microscope (FESEM) are employed here. According to the given fluorescence spectra, the spectral shift of emissions as well as quenching coefficients are assessed subsequently. The Stern-Volmer formalism is used to determine the quenching coefficients. In fact, RdB + RBCs suspensions contain a plenty of bioconjugates leading to the signal reduction and notable red shift in RdB fluorescence emissions. Furthermore, it is demonstrated that the positive blood type RBCs exhibit the higher quenching coefficients and the larger red shifts against those of negative blood types. This mainly arises from the nature of specific sugar antigens available on the RBC membranes as to N-acetylgalactosamine and galactose attached to the O-antigen terminal would enhance further quenching of the species. Moreover, a significant correlation appears between Stern-Volmer coefficients and the corresponding RBCs. In fact, distinct discrepancy takes place in quenching coefficients in terms various positive/negative blood types to envisage a facile method of blood typing.
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Affiliation(s)
- S Seyedi
- Physics Department, Amirkabir University of Technology, Tehran 15875-4413, Iran
| | - P Parvin
- Physics Department, Amirkabir University of Technology, Tehran 15875-4413, Iran.
| | - A Jafargholi
- Physics Department, Amirkabir University of Technology, Tehran 15875-4413, Iran
| | - A Abbasian
- Tehran Blood Transfusion Center, P.O. Box 1416613141, Tehran, Iran
| | - M Mehdinejad
- Tehran Blood Transfusion Center, P.O. Box 1416613141, Tehran, Iran
| | - A Khorrami
- CinnaGen Medical Biotechnology Research Center, Alborz University of Medical Sciences, P.O. Box 3165933155, Alborz, Iran; CinnaGen Research and Production Co., P.O. Box 3165933155, Alborz, Iran
| | - M Mehrabi
- Department of Physics, Persian Gulf University, P.O. Box 7516913817, Bushehr, Iran
| | - A Moafi
- Physics Department, Amirkabir University of Technology, Tehran 15875-4413, Iran
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Motlagh NSH, Parvin P, Mirzaie ZH, Karimi R, Sanderson JH, Atyabi F. Synergistic performance of triggered drug release and photothermal therapy of MCF7 cells based on laser activated PEGylated GO + DOX. BIOMEDICAL OPTICS EXPRESS 2020; 11:3783-3794. [PMID: 33014566 PMCID: PMC7510931 DOI: 10.1364/boe.389261] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 05/25/2020] [Accepted: 06/07/2020] [Indexed: 06/11/2023]
Abstract
Graphene oxide is used as a singular 2D nano-carrier in cancer therapy. Here, graphene oxide is used as a hybrid chemo-drug graphene oxide (GO) + doxorubicin (DOX), mainly due to its unique chemical and optical properties. The laser triggers GO + DOX for selective drug delivery to optimize the drug release. The characterization of GO is investigated in terms of laser properties at 808 nm. Furthermore, the laser activates GO + DOX compounds to treat MCF7 cancerous cells. The drug release strongly depends on the temperature rise that mainly effects on the viability of the cancerous cells of interest. DOX simultaneously acts as a chemo-drug and as an optical fluorescent agent, whereas GO performs as an efficient photothermal nano-carrier. In fact, the GO-DOX hybrid drug demonstrates multifunctional during malignant cell treatment. We have shown that the laser heating of GO enhances the release percentage up to a treatment yield of 90%. This arises from the synergistic nature of DOX and GO compounds in simultaneous chemo/photo thermal therapy. Furthermore, the fluorescence property of DOX is used to assess the GO uptake using confocal microscope imaging.
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Affiliation(s)
- N S Hosseini Motlagh
- Department of Biomedical Engineering, Meybod University, PO Box 89616-99557, Meybod, Iran
| | - P Parvin
- Physics Department, Amirkabir University of Technology, PO Box 15875-4413, Tehran, Iran
| | - Z H Mirzaie
- Nanotechnology Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, PO Box 14176-14411, Tehran, Iran
| | - R Karimi
- Physics Department, Amirkabir University of Technology, PO Box 15875-4413, Tehran, Iran
- Physics Department, Waterloo University, PO Box N2L3G1, Ontario, Canada
| | - J H Sanderson
- Physics Department, Waterloo University, PO Box N2L3G1, Ontario, Canada
| | - F Atyabi
- Nanotechnology Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, PO Box 14176-14411, Tehran, Iran
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Seyedi SS, Parvin P, Jafargholi A, Hashemi N, Tabatabaee SM, Abbasian A, Khorrami A. Spectroscopic properties of various blood antigens/antibodies. BIOMEDICAL OPTICS EXPRESS 2020; 11:2298-2312. [PMID: 32341884 PMCID: PMC7173882 DOI: 10.1364/boe.387112] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 03/10/2020] [Accepted: 03/26/2020] [Indexed: 06/11/2023]
Abstract
Since the traditional method generates biological waste, there is a significant demand for an easy, quick technique of blood type identification without contamination. In fact, individuals can be divided into four main blood groups whose antigens are available in red blood cell (RBC) membranes and the antibodies in the plasma. Here, UV-vis and photoluminescence (PL) spectroscopic methods are systematically used to find the spectra of blood typing antigens (A, B and AB) and antibodies i.e. A-Anti, B-Anti, AB-Anti and D reagent. The PL spectra of RBCs in different blood groups as well as the corresponding antibodies are successfully resolved for the purpose of blood typing. The unique photophysical characteristics of these biomolecules including signal intensity and peak emission wavelength in PL spectra are lucidly anticipated to accurately discriminate ABO groups. PL spectra of RBC in positive blood typing indicate larger signal and shorter emission peak wavelength corresponding to negative ones. Furthermore, the monoclonal antibody PL emissions emphasize that Anti-A benefits higher intensity and shorter peak wavelength (blue shift) than B-Anti. In the following, lucid blue shifts are obtained in terms of antibody concentrations accompanying the elevation of fluorescence signal, most likely due to the aggregation induced emission (AIE) phenomenon, quite the opposite of the aggregation-caused quenching (ACQ) that is widely observed from conventional chromophore. Those are envisaged as unique properties of each antibody to utilize in the spectral blood typing.
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Affiliation(s)
- Seyedeh Solaleh Seyedi
- Physics Department, Amirkabir University of Technology, P.O. Box 15875- 4413, Tehran, Iran
| | - Parviz Parvin
- Physics Department, Amirkabir University of Technology, P.O. Box 15875- 4413, Tehran, Iran
| | - Amir Jafargholi
- Physics Department, Amirkabir University of Technology, P.O. Box 15875- 4413, Tehran, Iran
| | - Nazanin Hashemi
- Chemistry Department, Amirkabir University of Technology, P.O.Box 15875- 4413, Tehran, Iran
| | | | - Ali Abbasian
- Tehran Blood Transfusion Center, P.O.Box 1416613141, Tehran, Iran
| | - Ahmad Khorrami
- CinnaGen Medical Biotechnology Research Center, Alborz University of Medical Sciences, P.O.Box 3165933155, Alborz, Iran
- CinnaGen Research and Production Co., P.O.Box 3165933155, Alborz, Iran
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Pahang F, Parvin P, Bavali A. Fluorescence quenching effects of carbon nano-structures (Graphene Oxide and Nano Diamond) coupled with Methylene Blue. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 229:117888. [PMID: 31826831 DOI: 10.1016/j.saa.2019.117888] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 11/30/2019] [Accepted: 12/01/2019] [Indexed: 06/10/2023]
Abstract
Here, the effect of Graphene Oxide (GO) and Nano Diamond (ND) carriers on the spectral properties of the fluorescence emissions of MB suspensions in the form of (MB + GO) and (MB + ND) biomaterials are investigated. The strong affinity of MB fluorophores with GO/ND nanostructures lead to the chemical bonding formation that affects the quenching coefficient and spectral shift. According to Stern-Volmer linearity despite, the excited (MB + GO) is strongly quenched due to its privileged bonding affinity, however the (MB + ND) does not. Furthermore, the corresponding quenching coefficients are measured. In fact, GO additives in the MB suspension gives rise to a sensible blue shift due to its surface functionality while no spectral shift takes place in the case of (MB + ND). We have shown that the complex formation such as (MB + GO) is strongly correlated to the GO quenching coefficient due to the hydrogen bonding and π - π staking, whereas there is a loose dependence with the blue shift phenomena. Furthermore, we have compared the quenching coefficients of Rd6G and DOX with MB fluorophore to attest the quenching coefficient is strongly correlated to the molecular structure and its active sites. The findings could be helpful in the course of simultaneous PDT and fluorescence imaging.
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Affiliation(s)
- F Pahang
- Physics Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
| | - P Parvin
- Physics Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran.
| | - A Bavali
- Physics Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
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Guan Y, Zhong Q. Stable aqueous foams created with intercalated montmorillonite nanoclay coated by sodium caseinate. J FOOD ENG 2019. [DOI: 10.1016/j.jfoodeng.2018.12.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Mateos R, García-Zafra A, Vera-López S, San Andrés MP, Díez-Pascual AM. Effect of Graphene Flakes Modified by Dispersion in Surfactant Solutions on the Fluorescence Behaviour of Pyridoxine. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E888. [PMID: 29799471 PMCID: PMC6025388 DOI: 10.3390/ma11060888] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 05/14/2018] [Accepted: 05/23/2018] [Indexed: 11/16/2022]
Abstract
The influence of graphene (G) dispersions in different types of surfactants (anionic, non-ionic, and cationic) on the fluorescence of vitamin B₆ (pyridoxine) was studied. Scanning electron microscopy (SEM) was used to evaluate the quality of the G dispersions via measuring their flake thickness. The effect of surfactant type and concentration on the fluorescence intensity was analyzed, and fluorescence quenching effects were found for all of the systems. These turn out to be more intense with increasing both surfactant and G concentrations, albeit they do not depend on the G/surfactant weight ratio. For the same G concentration, the magnitude of the quenching follows the order: cationic > non-ionic ≥ anionic. The cationic surfactants, which strongly adsorb onto G via electrostatic attraction, are the most effective dispersing agents and they enable a stronger interaction with the zwitterionic form of the vitamin; the dispersing power improves with increasing the surfactant chain length. The fit of the experimental data to the Stern-Volmer equation suggests either a static or dynamic quenching mechanism for the dispersions in non-ionic surfactants, while those in ionic surfactants show a combined mechanism. The results that were obtained herein have been compared to those that were reported earlier for the quenching of another vitamin, riboflavin, to elucidate how the change in the vitamin structure influences the interactions with G in the surfactant dispersions.
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Affiliation(s)
- Rocío Mateos
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences, Alcalá University, 28871 Alcalá de Henares, Madrid, Spain.
| | - Alba García-Zafra
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences, Alcalá University, 28871 Alcalá de Henares, Madrid, Spain.
| | - Soledad Vera-López
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences, Alcalá University, 28871 Alcalá de Henares, Madrid, Spain.
| | - María Paz San Andrés
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences, Alcalá University, 28871 Alcalá de Henares, Madrid, Spain.
| | - Ana María Díez-Pascual
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences, Alcalá University, 28871 Alcalá de Henares, Madrid, Spain.
- Institute of Chemistry Research, "Andrés M. del Río" (IQAR), University of Alcalá, Ctra. Madrid Barcelona, Km. 33.6, 28871 Alcalá de Henares, Madrid, Spain.
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Mateos R, Vera S, Valiente M, Díez-Pascual AM, San Andrés MP. Comparison of Anionic, Cationic and Nonionic Surfactants as Dispersing Agents for Graphene Based on the Fluorescence of Riboflavin. NANOMATERIALS 2017; 7:nano7110403. [PMID: 29165390 PMCID: PMC5707620 DOI: 10.3390/nano7110403] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 11/14/2017] [Accepted: 11/16/2017] [Indexed: 02/06/2023]
Abstract
Fluorescence quenching is a valuable tool to gain insight about dynamic changes of fluorophores in complex systems. Graphene (G), a single-layered 2D nanomaterial with unique properties, was dispersed in surfactant aqueous solutions of different nature: non-ionic polyoxyethylene-23-lauryl ether (Brij L23), anionic sodium dodecylsulphate (SDS), and cationic hexadecyltrimethylammonium bromide (CTAB) and dodecyltrimethylammonium bromide (DTAB). The influence of the surfactant type, chain length and concentration, G total concentration and G/surfactant weight ratio on the fluorescence intensity of vitamin B2 (riboflavin) was investigated. The quality of the different G dispersions was assessed by scanning and transmission electron microscopies (SEM and TEM). A quenching phenomenon of the fluorescence of riboflavin was found for G dispersions in all the surfactants, which generally becomes stronger with increasing G/surfactant weight ratio. For dispersions in the ionic surfactants, the quenching is more pronounced as the surfactant concentration raises, whilst the non-ionic one remains merely unchanged for the different G/Brij L23 weight ratios. More importantly, results indicate that DTAB solutions are the optimum media for dispersing G sheets, leading to an up to 16-fold drop in the fluorescence intensity. Understanding the mechanism in fluorescence quenching of G dispersions in surfactants could be useful for several optical applications.
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Affiliation(s)
- Rocío Mateos
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Biology, Environmental Sciences and Chemistry, Alcalá University, Alcalá de Henares, 28871 Madrid, Spain.
| | - Soledad Vera
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Biology, Environmental Sciences and Chemistry, Alcalá University, Alcalá de Henares, 28871 Madrid, Spain.
| | - Mercedes Valiente
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Biology, Environmental Sciences and Chemistry, Alcalá University, Alcalá de Henares, 28871 Madrid, Spain.
- Institute of Chemistry Research "Andrés M. del Río" (IQAR), University of Alcalá, Ctra, Madrid-Barcelona, Km. 33.6, Alcalá de Henares, 28871 Madrid, Spain.
| | - Ana María Díez-Pascual
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Biology, Environmental Sciences and Chemistry, Alcalá University, Alcalá de Henares, 28871 Madrid, Spain.
- Institute of Chemistry Research "Andrés M. del Río" (IQAR), University of Alcalá, Ctra, Madrid-Barcelona, Km. 33.6, Alcalá de Henares, 28871 Madrid, Spain.
| | - María Paz San Andrés
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Biology, Environmental Sciences and Chemistry, Alcalá University, Alcalá de Henares, 28871 Madrid, Spain.
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Hosseini Motlagh NS, Parvin P, Refahizadeh M, Bavali A. Fluorescence properties of doxorubicin coupled carbon nanocarriers. APPLIED OPTICS 2017; 56:7498-7503. [PMID: 29048075 DOI: 10.1364/ao.56.007498] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 08/22/2017] [Indexed: 06/07/2023]
Abstract
The effect of graphene oxide (GO) and nanodiamond (ND) is investigated on the spectral properties of doxorubicin (DOX) fluorescence emissions in the form of (DOX+GO) and (DOX+ND) biomaterials. It is shown that carbon nanostructure additives lead to sensible blueshifts, due to their optical properties and surface functionality. The quenching coefficient KND is obtained to be KND=0.043 (μg/ml)-1 and KGO=0.342 (μg/ml)-1 in DOX solutions. In general, Stern-Volmer attests that excited (DOX+GO) strongly quenches with respect to that of (DOX+ND) regarding its privileged bonding affinity.
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Ghasemi F, Parvin P, Motlagh NSH, Abachi S. LIF spectroscopy of stained malignant breast tissues. BIOMEDICAL OPTICS EXPRESS 2017; 8:512-523. [PMID: 28270964 PMCID: PMC5330572 DOI: 10.1364/boe.8.000512] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 11/03/2016] [Accepted: 12/09/2016] [Indexed: 06/06/2023]
Abstract
We employ laser induced fluorescence (LIF) spectroscopy to discriminate between normal and cancerous human breast (in-vitro) tissues. LIF signals are usually enhanced by the exogenous agents such as Rhodamine 6G (Rd6G) and Coumarin 7 (C7). Although we observe fluorescence emissions in both fluorophores, Rd6G-stained tissues give notable spectral red shift in practice. The latter is a function of dye concentration embedded in tissues. We find that such red shifts have a strong dependence on the dye concentration in bare, in stained healthy, and in malignant breast tissues, signifying variations in tubular abundances. In fact, the heterogeneity of cancerous tissues is more prominent mainly due to their notable tubular densities- which can provide numerous micro-cavities to house more dye molecules. We show that this can be used to discriminate between the healthy and unhealthy specimens in different biological scaffolds of ordered (healthy) and disordered (cancerous) tissues. It is demonstrated that the quenching process of fluorophore' molecules slows down in the neoplastic tumors according to the micro-partitioning, too.
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Affiliation(s)
- Fatemeh Ghasemi
- Physics Department, Amirkabir University of Technology, P.O. Box 15875–4413, Tehran, Iran
| | - Parviz Parvin
- Physics Department, Amirkabir University of Technology, P.O. Box 15875–4413, Tehran, Iran
| | | | - Shahriar Abachi
- Physics & Astronomy Department, California State University 90032, Los Angeles, California, USA
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Motlagh NSH, Parvin P, Ghasemi F, Atyabi F. Fluorescence properties of several chemotherapy drugs: doxorubicin, paclitaxel and bleomycin. BIOMEDICAL OPTICS EXPRESS 2016; 7:2400-6. [PMID: 27375954 PMCID: PMC4918592 DOI: 10.1364/boe.7.002400] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 05/05/2016] [Accepted: 05/07/2016] [Indexed: 05/22/2023]
Abstract
Several chemo-drugs act as the biocompatible fluorophores. Here, the laser induced fluorescence (LIF) properties of doxorubicin, paclitaxel and bleomycin are investigated. The absorption lines mostly lie over UV range according to the UV-VIS spectra. Therefore, a single XeCl laser provokes the desired transitions of the chemo-drugs of interest at 308 nm. It is shown that LIF spectra are strongly dependent on the fluorophore concentration giving rise to the sensible red shift. This happens when large overlapping area appears between absorption and emission spectra accordingly. The red shift is taken into account as a characteristic parameter of a certain chemo-drug. The fluorescence extinction (α) and self-quenching (k) coefficients are determined based on the best fitting of the adopted Lambert-Beer equation over experimental data. The quantum yield of each chemo-drug is also measured using the linearity of the absorption and emission rates.
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Affiliation(s)
| | - Parviz Parvin
- Physics Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
| | - Fatemah Ghasemi
- Physics Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
| | - Fatemeh Atyabi
- Nano Medicine and Biomaterial Lab, Pharmaceutics Department, Faculty of Pharmacy, Tehran University of Medical Sciences, P.O. Box 14176-14411, Tehran, Iran
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Díez-Pascual AM, García-García D, San Andrés MP, Vera S. Determination of riboflavin based on fluorescence quenching by graphene dispersions in polyethylene glycol. RSC Adv 2016. [DOI: 10.1039/c5ra25547c] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A quenching phenomenon of riboflavin fluorescence was found in graphene dispersions in PEG ascribed to π–π stacking and H-bonding interactions.
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Affiliation(s)
- Ana M. Díez-Pascual
- Analytical Chemistry, Physical Chemistry and Chemical Engineering Department
- Faculty of Biology
- Environmental Sciences and Chemistry
- Alcalá University
- Madrid
| | - Diego García-García
- Analytical Chemistry, Physical Chemistry and Chemical Engineering Department
- Faculty of Biology
- Environmental Sciences and Chemistry
- Alcalá University
- Madrid
| | - María Paz San Andrés
- Analytical Chemistry, Physical Chemistry and Chemical Engineering Department
- Faculty of Biology
- Environmental Sciences and Chemistry
- Alcalá University
- Madrid
| | - Soledad Vera
- Analytical Chemistry, Physical Chemistry and Chemical Engineering Department
- Faculty of Biology
- Environmental Sciences and Chemistry
- Alcalá University
- Madrid
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