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Nene LC, Nkune NW, Abrahamse H. Anticancer photodynamic activities of triphenylphosphine-labelled phthalocyanines and their bovine serum albumin-gold nanoparticles- complexes on melanoma A375 cell lines in vitro. J Inorg Biochem 2024; 256:112570. [PMID: 38685138 DOI: 10.1016/j.jinorgbio.2024.112570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 04/18/2024] [Accepted: 04/19/2024] [Indexed: 05/02/2024]
Abstract
This work reports on the synthesis of triphenylphosphine-labelled cationic phthalocyanines (Pc) complexed with bovine serum albumin (BSA) and gold nanoparticles (Au NPs). This nano-complex (Pc-BSA-Au) is studied for its photodynamic therapy (PDT) activity compared to the non-complexed Pc counterpart. The photochemical properties and in vitro PDT efficacies of the Pc and the nano-complex were determined and are compared herein. The singlet oxygen (1O2) yields of the Pcs were determined and are reported in DMF. A singlet oxygen quantum yield of 0.47 was obtained for the Pcs. The PDT efficacies of the complexes were thereafter determined using malignant melanoma A375 cancer cell line in vitro. An increase in the cell toxicity was observed for cells treated with Pc-BSA-Au compared to those treated with the Pc alone. The cell survival percentages were 23.1% for cells treated with Pc-BSA-Au and 48.7% for those treated with Pc alone under PDT treatments.
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Affiliation(s)
- Lindokuhle Cindy Nene
- Laser Research Centre, Faculty of Health Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, South Africa
| | - Nkune Williams Nkune
- Laser Research Centre, Faculty of Health Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, South Africa
| | - Heidi Abrahamse
- Laser Research Centre, Faculty of Health Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, South Africa.
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Structural elucidation, in vitro DNA binding and anticancer investigations of a new specific target dinuclear Zn(II) complex. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Naik R, Seetharamappa J. Elucidating the binding mechanism of an antimigraine agent with a model protein: insights from molecular spectroscopic, calorimetric and computational approaches. J Biomol Struct Dyn 2022; 41:3686-3701. [PMID: 35322751 DOI: 10.1080/07391102.2022.2053747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Sumatriptan (SUM), a serotonin activator used to treat migraines and cluster headaches. Molecular spectroscopic methods including fluorescence quenching, time dependent fluorescence, FRET, absorption, circular dichroism, differential scanning calorimetric and computational approaches were employed to unravel the interaction between sumatriptan and bovine serum albumin (BSA). The fluorescence quenching studies suggested the interaction between SUM and BSA with a moderate binding with the binding constant (Kb) in the order of 104. The findings of temperature and time dependent fluorescence quenching studies confirmed the role of static quenching mechanism. Thermodynamic parameters suggested the key role of electrostatic force in the interaction of SUM with BSA. Absorption and CD spectral studies revealed the bioenvironmental changes around the Trp in BSA upon binding of SUM. Calorimetric based thermal denaturation results confirmed that the thermal stability of BSA was improved in the presence of SUM. resulted in the this decreased flexibility of protein chain. Site competitive studies indicated SUM was located in the hydrophobic cavity of site I which was further confirmed by the docking and dynamic simulation studies. Additionally, molecular dynamics simulations inferred the microenvironmental condition around the SUM and the amino acids and forces involved in the binding of SUM with BSA.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Roopa Naik
- Department of Chemistry, Karnatak University, Dharwad, Karnataka, India
| | - J Seetharamappa
- Department of Chemistry, Karnatak University, Dharwad, Karnataka, India
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Banerjee A, Sanyal S, Dutta S, Chakraborty P, Das PP, Jana K, Vasudevan M, Das C, Dasgupta D. The plant alkaloid chelerythrine binds to chromatin, alters H3K9Ac and modulates global gene expression. J Biomol Struct Dyn 2016; 35:1491-1499. [PMID: 27494525 DOI: 10.1080/07391102.2016.1188154] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Chelerythrine (CHL), a plant alkaloid, possesses antimicrobial, anti-inflammatory, and antitumor properties. Although CHL influences several key signal transduction pathways, its ability to interact directly with nucleoprotein complex chromatin, in eukaryotic cells has so far not been looked into. Here we have demonstrated its association with hierarchically assembled chromatin components, viz. long chromatin, chromatosome, nucleosome, chromosomal DNA, and histone H3 and the consequent effect on chromatin structure. CHL was found to repress acetylation at H3K9. It is more target-specific in terms of gene expression alteration and less cytotoxic compared to its structural analog sanguinarine.
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Affiliation(s)
- Amrita Banerjee
- a Biophysics and Structural Genomics Division , Saha Institute of Nuclear Physics , Block - AF Sector-I, Bidhan Nagar, Kolkata 700064 , India
| | - Sulagna Sanyal
- a Biophysics and Structural Genomics Division , Saha Institute of Nuclear Physics , Block - AF Sector-I, Bidhan Nagar, Kolkata 700064 , India
| | - Shreyasi Dutta
- a Biophysics and Structural Genomics Division , Saha Institute of Nuclear Physics , Block - AF Sector-I, Bidhan Nagar, Kolkata 700064 , India
| | - Payal Chakraborty
- b Genome Informatics Research Group , Bionivid Technology Pvt Ltd. , Bangalore 560043 , India
| | - Prajna Paramita Das
- a Biophysics and Structural Genomics Division , Saha Institute of Nuclear Physics , Block - AF Sector-I, Bidhan Nagar, Kolkata 700064 , India
| | - Kuladip Jana
- c Division of Molecular Medicine, Centre for Translational Animal Research , Bose Institute , P 1/12, C. I. T. Road, Scheme - VIIM, Kolkata 700054 , India
| | - Madavan Vasudevan
- b Genome Informatics Research Group , Bionivid Technology Pvt Ltd. , Bangalore 560043 , India
| | - Chandrima Das
- a Biophysics and Structural Genomics Division , Saha Institute of Nuclear Physics , Block - AF Sector-I, Bidhan Nagar, Kolkata 700064 , India
| | - Dipak Dasgupta
- a Biophysics and Structural Genomics Division , Saha Institute of Nuclear Physics , Block - AF Sector-I, Bidhan Nagar, Kolkata 700064 , India
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Bhuiya S, Pradhan AB, Haque L, Das S. Molecular Aspects of the Interaction of Iminium and Alkanolamine Forms of the Anticancer Alkaloid Chelerythrine with Plasma Protein Bovine Serum Albumin. J Phys Chem B 2015; 120:5-17. [DOI: 10.1021/acs.jpcb.5b07818] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sutanwi Bhuiya
- Department
of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India
| | - Ankur Bikash Pradhan
- Department
of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India
| | - Lucy Haque
- Department
of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India
| | - Suman Das
- Department
of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India
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