51
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Shanmugaraj K, Umadevi P, Senthilkumar L, Ilanchelian M. Elucidation of Binding Mechanism of Photodynamic Therapeutic Agent Toluidine Blue O with Chicken Egg White Lysozyme by Spectroscopic and Molecular Dynamics Studies. Photochem Photobiol 2017; 93:1043-1056. [DOI: 10.1111/php.12744] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 01/24/2017] [Indexed: 11/30/2022]
Affiliation(s)
| | - Palanivel Umadevi
- Department of Physics; Bharathiar University; Coimbatore Tamil Nadu India
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52
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Zhang L, Xiao Q, Wang Y, Zhang C, He W, Yin L. Denatured protein-coated docetaxel nanoparticles: Alterable drug state and cytosolic delivery. Int J Pharm 2017; 523:1-14. [PMID: 28323094 DOI: 10.1016/j.ijpharm.2017.03.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 02/28/2017] [Accepted: 03/13/2017] [Indexed: 11/25/2022]
Abstract
Many lead compounds have a low solubility in water, which substantially hinders their clinical application. Nanosuspensions have been considered a promising strategy for the delivery of water-insoluble drugs. Here, denatured soy protein isolate (SPI)-coated docetaxel nanosuspensions (DTX-NS) were developed using an anti-solvent precipitation-ultrasonication method to improve the water-solubility of DTX, thus improving its intracellular delivery. DTX-NS, with a diameter of 150-250nm and drug-loading up to 18.18%, were successfully prepared by coating drug particles with SPI. Interestingly, the drug state of DTX-NS was alterable. Amorphous drug nanoparticles were obtained at low drug-loading, whereas at a high drug-loading, the DTX-NS drug was mainly present in the crystalline state. Moreover, DTX-NS could be internalized at high levels by cancer cells and enter the cytosol by lysosomal escape, enhancing cell cytotoxicity and apoptosis compared with free DTX. Taken together, denatured SPI has a strong stabilization effect on nanosuspensions, and the drug state in SPI-coated nanosuspensions is alterable by changing the drug-loading. Moreover, DTX-NS could achieve cytosolic delivery, generating enhanced cell cytotoxicity against cancer cells.
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Affiliation(s)
- Li Zhang
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Qingqing Xiao
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Yiran Wang
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Chenshuang Zhang
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Wei He
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China.
| | - Lifang Yin
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China.
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53
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He W, Wang Y, Lv Y, Xiao Q, Ye L, Cai B, Qin C, Han X, Cai T, Yin L. Denatured protein stabilized drug nanoparticles: tunable drug state and penetration across the intestinal barrier. J Mater Chem B 2017; 5:1081-1097. [PMID: 32263886 DOI: 10.1039/c6tb02577c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanosuspensions of drugs are nanosized colloidal dispersions of pure particles. In contrast to conventional nanoparticles, the particles in nanosuspensions feature 100% drug loading. Stiripentol (STP) is an effective drug for severe myoclonic epilepsy of infancy (SMEI); however, because of its low water solubility, high oral doses of STP, up to 50 mg per kg per day in two or three divided doses, must be administered to patients, compromising therapy outcomes. Here, we report STP nanosuspensions (STP-Ns) stabilized with denatured soybean protein isolate (SPI) as a stabilizer to promote the absorption of STP and thus improve therapeutic outcomes. STP-Ns with a drug loading of up to 50% (w/w) and a diameter of 150 nm were successfully prepared. Importantly, in the presence of denatured SPI as a stabilizer, the drug state in the nanosuspensions was tunable by drug loading: low drug loading resulted in the formation of amorphous drug nanoparticles while high drug loading greater than 3.22% (w/w) in formulation induced the formation of nanosuspensions with the coexistence of amorphous and crystalline drug. This new nanosuspension formulation was related to the fact that the protein-drug complex exhibited a much stronger affinity for the drug particles over the protein itself. Interestingly, via the transcytosis pathway, the STP-Ns penetrated across the intestinal barrier into the systemic circulation, with the duodenum as the predominant absorption site. The bioavailability of the STP-Ns was 4-fold as great as that of raw crystals. The discovery of this mechanism for the use of globular protein as a stabilizer for nanosuspensions provides a new route for the preparation of amorphous drug nanoparticles. This work offers a new strategy to widen the application of globular protein and nanosuspensions of insoluble active compounds in drug delivery.
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Affiliation(s)
- Wei He
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China.
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54
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Chen S, Zhang N, Tang CH. Influence of nanocomplexation with curcumin on emulsifying properties and emulsion oxidative stability of soy protein isolate at pH 3.0 and 7.0. Food Hydrocoll 2016. [DOI: 10.1016/j.foodhyd.2016.04.048] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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55
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Arumugam SS, Subramanian N, Malaichamy I. New insights into the dimerization and site-specific cooperative interaction of Azure B with model transport proteins by spectroscopic and computational studies. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 164:212-225. [DOI: 10.1016/j.jphotobiol.2016.09.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Revised: 09/05/2016] [Accepted: 09/08/2016] [Indexed: 12/16/2022]
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56
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Chen FP, Zhang N, Tang CH. Food proteins as vehicles for enhanced water dispersibility, stability and bioaccessibility of coenzyme Q10. Lebensm Wiss Technol 2016. [DOI: 10.1016/j.lwt.2016.04.040] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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57
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Yeggoni DPR, Manidhar DM, Suresh Reddy C, Subramanyam R. Investigation of binding mechanism of novel 8-substituted coumarin derivatives with human serum albumin and α-1-glycoprotein. J Biomol Struct Dyn 2016; 34:2023-36. [PMID: 26440860 DOI: 10.1080/07391102.2015.1104264] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Coumarin molecules have biological activities possessing lipid-controlling activity, anti-hepatitis C activity, anti-diabetic, anti-Parkinson activity, and anti-cancer activity. Here, we have presented an inclusive study on the interaction of 8-substituted-7-hydroxy coumarin derivatives (Umb-1/Umb-2) with α-1-glycoprotein (AGP) and human serum albumin (HSA) which are the major carrier proteins in the human blood plasma. Binding constants obtained from fluorescence emission data were found to be KUmb-1=3.1 ± .01 × 10(4) M(-1), KUmb-2 = 7 ± .01 × 10(4) M(-1), which corresponds to -6.1 and -6.5 kcal/mol of free energy for Umb-1 and Umb-2, respectively, suggesting that these derivatives bind strongly to HSA. Also these molecules bind to AGP with binding constants of KUmb-1-AGP=3.1 ± .01 × 10(3) M(-1) and KUmb-2-AGP = 4.6 ± .01 × 10(3) M(-1). Further, the distance, r between the donor (HSA) and acceptor (Umb-1/Umb-2) was calculated based on the Forster's theory of non-radiation energy transfer and the values were observed to be 1.14 and 1.29 nm in Umb-1-HSA and Umb-2-HSA system, respectively. The protein secondary structure of HSA was partially unfolded upon binding of Umb-1 and Umb-2. Furthermore, site displacement experiments with lidocaine, phenylbutazone (IIA), and ibuprofen (IIIA) proves that Umb derivatives significantly bind to subdomain IIIA of HSA which is further supported by docking studies. Furthermore, Umb-1 binds to LYS402 with one hydrogen bond distance of 2.8 Å and Umb-2 binds to GLU354 with one hydrogen bond at a distance of 2.0 Å. Moreover, these molecules are stabilized by hydrophobic interactions and hydrogen bond between the hydroxyl groups of carbon-3 of coumarin derivatives.
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Affiliation(s)
- Daniel Pushpa Raju Yeggoni
- a Department of Plant Sciences , School of Life Sciences, University of Hyderabad , Hyderabad 500046 , India
| | - Darla Mark Manidhar
- b Department of Chemistry , Sri Venkateswara University , Tirupati , Andhra Pradesh 517502 , India
| | - Cirandur Suresh Reddy
- b Department of Chemistry , Sri Venkateswara University , Tirupati , Andhra Pradesh 517502 , India
| | - Rajagopal Subramanyam
- a Department of Plant Sciences , School of Life Sciences, University of Hyderabad , Hyderabad 500046 , India
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58
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Chen FP, Li BS, Tang CH. Nanocomplexation of soy protein isolate with curcumin: Influence of ultrasonic treatment. Food Res Int 2015; 75:157-165. [DOI: 10.1016/j.foodres.2015.06.009] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 05/31/2015] [Accepted: 06/03/2015] [Indexed: 01/14/2023]
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59
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Shanmugaraj K, Anandakumar S, Ilanchelian M. Unraveling the binding interaction of Toluidine blue O with bovine hemoglobin – a multi spectroscopic and molecular modeling approach. RSC Adv 2015. [DOI: 10.1039/c4ra11136b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Toluidine blue O (TBO) is a cationic photosensitizer that belongs to the class of phenothiazinium dyes.
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60
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Wan ZL, Guo J, Yang XQ. Plant protein-based delivery systems for bioactive ingredients in foods. Food Funct 2015; 6:2876-89. [DOI: 10.1039/c5fo00050e] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The application of food-grade delivery systems for the encapsulation, protection and controlled release of bioactive food ingredients have recently gained increasing interest in the research fields of functional foods and pharmaceutics. The preparation and application of bifunctional particles provide a novel perspective for the design of plant protein-based delivery system.
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Affiliation(s)
- Zhi-Li Wan
- Research and Development Center of Food Proteins
- Department of Food Science and Technology
- South China University of Technology
- Guangzhou 510640
- People's Republic of China
| | - Jian Guo
- Research and Development Center of Food Proteins
- Department of Food Science and Technology
- South China University of Technology
- Guangzhou 510640
- People's Republic of China
| | - Xiao-Quan Yang
- Research and Development Center of Food Proteins
- Department of Food Science and Technology
- South China University of Technology
- Guangzhou 510640
- People's Republic of China
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61
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Wang J, Wei J, Su S, Qiu J. Novel fluorescence resonance energy transfer optical sensors for vitamin B12 detection using thermally reduced carbon dots. NEW J CHEM 2015. [DOI: 10.1039/c4nj00538d] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
After thermal reduction, the quantum yield of thermally reduced carbon dots demonstrated a 5-fold increase over that of the original carbon dots.
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Affiliation(s)
- Jilong Wang
- Department of Mechanical Engineering
- Texas Tech University
- Lubbock
- USA
| | - Junhua Wei
- Department of Mechanical Engineering
- Texas Tech University
- Lubbock
- USA
| | - Siheng Su
- Department of Mechanical Engineering
- Texas Tech University
- Lubbock
- USA
| | - Jingjing Qiu
- Department of Mechanical Engineering
- Texas Tech University
- Lubbock
- USA
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62
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Intestinal uptake and transport of vitamin B12-loaded soy protein nanoparticles. Pharm Res 2014; 32:1288-303. [PMID: 25319101 DOI: 10.1007/s11095-014-1533-x] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 09/25/2014] [Indexed: 10/24/2022]
Abstract
BACKGROUND Intestinal absorption of vitamin B12 (VB12) is a major challenge in combating pernicious anemia due to intrinsic factor (IF) deficiency. PURPOSE The aim of this study was to explore the feasibility of using soy protein isolates (SPI) nanoparticles to improve the intestinal transport and absorption of VB12. METHODS Three different sized VB12-loaded SPI nanoparticles were produced by modulating preparation conditions using a cold-gelation method. The intestinal uptake and transport mechanisms of SPI nanoparticles for VB12 delivery were investigated and related to particle size. RESULTS SPI nanoparticles were not cytotoxic to Caco-2 cells and were effectively internalized into the cytoplasm via multiple endocytosis pathways including clathrin- and/or caveolae-mediated endocytosis and macropinocytosis routes. VB12 transport across the Caco-2 cell monolayers was increased to 2-3 times after nanoencapsulation, which was dependent on particle size, in the increasing order of 30 > 100 > 180 nm. Using inhibitor block method, the transport of 30 and 100 nm SPI nanoparticles appeared to be clathrin-mediated transcytosis and macropinocytosis routes. The intestinal transport of VB12, assessed using rodent jejunum in Ussing chambers, was improved up to 4-fold after being encapsulated into 30 nm SPI nanoparticles. CONCLUSIONS The findings suggest that SPI nanoparticles could be a promising carrier to facilitate the oral delivery of VB12.
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63
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Sharma AS, Anandakumar S, Ilanchelian M. In vitro investigation of domain specific interactions of phenothiazine dye with serum proteins by spectroscopic and molecular docking approaches. RSC Adv 2014. [DOI: 10.1039/c4ra04630g] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In the present study the interaction of the chemotherapeutic agent, Azure A (AZA) with Human Serum Albumin (HSA) and Bovine Serum Albumin (BSA) was investigated by multi spectroscopic and molecular docking methods.
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