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Dudek A, Szulc N, Pawlak A, Strugała-Danak P, Krawczyk-Łebek A, Perz M, Kostrzewa-Susłow E, Pruchnik H. Structural investigation of interactions between halogenated flavonoids and the lipid membrane along with their role as cytotoxic agents. Sci Rep 2024; 14:10561. [PMID: 38719884 PMCID: PMC11078956 DOI: 10.1038/s41598-024-61037-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Accepted: 04/30/2024] [Indexed: 05/12/2024] Open
Abstract
This study focuses on understanding the structural and molecular changes in lipid membranes under the influence of six halogenated flavonoid derivatives differing in the number and position of substitution of chlorine and bromine atoms (D1-D6). Utilizing various analytical techniques, including fluorometric methods, dynamic light scattering (DLS), attenuated Fourier transform infrared spectroscopy (ATR- FTIR), and FT-Raman spectroscopy, the research aims to elucidate the mechanisms underlying the interaction of flavonoids with cell membranes. Additionally, the study includes in silico analyses to explore the physicochemical properties of these compounds and their potential pharmaceutical applications, along with toxicity studies to assess their effects on cancer, normal, and red blood cells. Our study showed the ability of halogenated derivatives to interact mostly with the outer part of the membrane, especially in the lipid heads region however, some of them were able to penetrate deeper into the membrane and affect the fluidity of hydrocarbon chains. The potential to reduce cancer cell viability, the lack of toxicity towards erythrocytes, and the favourable physicochemical and pharmacokinetic properties suggest these halogenated flavonoids potential candidates for exploring their potential for medical use.
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Affiliation(s)
- Anita Dudek
- Department of Physics and Biophysics, Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375, Wrocław, Poland.
| | - Natalia Szulc
- Department of Physics and Biophysics, Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375, Wrocław, Poland
| | - Aleksandra Pawlak
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Wrocław University of Environmental and Life Sciences, Norwida 31, 50-375, Wrocław, Poland
| | - Paulina Strugała-Danak
- Department of Physics and Biophysics, Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375, Wrocław, Poland
| | - Agnieszka Krawczyk-Łebek
- Department of Food Chemistry and Biocatalysis, Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375, Wrocław, Poland
| | - Martyna Perz
- Department of Food Chemistry and Biocatalysis, Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375, Wrocław, Poland
| | - Edyta Kostrzewa-Susłow
- Department of Food Chemistry and Biocatalysis, Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375, Wrocław, Poland
| | - Hanna Pruchnik
- Department of Physics and Biophysics, Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375, Wrocław, Poland
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Jin YZ, Xin YB, Li Y, Chen XY, Man DA, Tian YS. Synthesis and Selective Anticancer Activity Evaluation of 2-phenylacrylonitrile Derivatives as Tubulin Inhibitors. Curr Med Chem 2024; 31:2090-2106. [PMID: 38384112 PMCID: PMC11071649 DOI: 10.2174/0109298673263854231009063053] [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: 06/07/2023] [Revised: 08/17/2023] [Accepted: 09/01/2023] [Indexed: 02/23/2024]
Abstract
OBJECTIVE This study aimed at synthesizing 13 series of novel derivatives with 2-phenylacrylonitrile, evaluating antitumor activity both in vivo and in vitro, and obtaining novel tubulin inhibitors. METHOD The 13 series of 2-phenylacrylonitrile derivatives were synthesized by Knoevenagel condensation and the anti-proliferative activities were determined by MTT assay. The cell cycle and apoptosis were analyzed by flow cytometer. Quantitative cell migration was performed using 24-well Boyden chambers. The proteins were detected by western blotting. in vitro kinetics of microtubule assembly was measured using ELISA kit for Human β-tubulin (TUBB). Molecular docking was done by Discovery Studio (DS) 2017 Client online tool. RESULTS Among the derivatives, compound 1g2a possessed strong inhibitory activity against HCT116 (IC50 = 5.9 nM) and BEL-7402 (IC50 = 7.8 nM) cells. Compound 1g2a exhibited better selective antiproliferative activities and specificities than all the positive control drugs, including taxol. Compound 1g2a inhibited proliferation of HCT116 and BEL-7402 cells by arresting them in the G2/M phase of the cell cycle, inhibited the migration of HCT116 and BEL-7402 cells and the formation of cell colonies. Compound 1g2a showed excellent tubulin polymerization inhibitory activity on HCT116 and BEL-7402 cells. The results of molecular docking analyses showed that 1g2a may inhibit tubulin to exert anticancer effects. CONCLUSION Compound 1g2a shows outstanding antitumor activity both in vivo and in vitro and has the potential to be further developed into a highly effective antitumor agent with little toxicity to normal tissues.
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Affiliation(s)
- Ye-Zhi Jin
- Key Laboratory of Natural Medicines of the Changbai Mountain, Department of Medicinal Chemistry, Ministry of Education, College of Pharmacy, Yanbian University, Yanji, 133002, Jilin Province, P.R. China
| | - Ya-Bing Xin
- Key Laboratory of Natural Medicines of the Changbai Mountain, Department of Medicinal Chemistry, Ministry of Education, College of Pharmacy, Yanbian University, Yanji, 133002, Jilin Province, P.R. China
| | - Yuan Li
- Key Laboratory of Natural Medicines of the Changbai Mountain, Department of Medicinal Chemistry, Ministry of Education, College of Pharmacy, Yanbian University, Yanji, 133002, Jilin Province, P.R. China
| | - Xin-Yuan Chen
- Key Laboratory of Natural Medicines of the Changbai Mountain, Department of Medicinal Chemistry, Ministry of Education, College of Pharmacy, Yanbian University, Yanji, 133002, Jilin Province, P.R. China
| | - De-Ao Man
- Key Laboratory of Natural Medicines of the Changbai Mountain, Department of Medicinal Chemistry, Ministry of Education, College of Pharmacy, Yanbian University, Yanji, 133002, Jilin Province, P.R. China
| | - Yu-Shun Tian
- Key Laboratory of Natural Medicines of the Changbai Mountain, Department of Medicinal Chemistry, Ministry of Education, College of Pharmacy, Yanbian University, Yanji, 133002, Jilin Province, P.R. China
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Bose R, Paul A, Dutta R, Hazra A, Pramanik A, Mandal Biswas S. Synthesis, antimicrobial, anticancer evaluation and molecular docking with Bax and MDM2 of dibromosterculic acid. Nat Prod Res 2023:1-8. [PMID: 38148119 DOI: 10.1080/14786419.2023.2294107] [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: 12/26/2022] [Accepted: 12/04/2023] [Indexed: 12/28/2023]
Abstract
Dibromosterculic acid [8-(1,2-dibromo-2-octylcyclopropyl)-octanoic acid], a new synthetic derivative was prepared by bromination of sterculic acid. This synthetic derivative showed strong fungicidal activity against two pathogenic fungal species namely Penicillium chrysogenum and Aspergillus niger with minimum inhibitory concentration (MIC) value of 0.007 mg/ml and good bactericidal activity against Bacillus subtilis and Xanthomonas sp. with MIC value of 0.015 mg/ml. Cytotoxic activity on both normal (MCF-10A) and cancerous (MDA-MB-468) cell lines revealed that the survivability percentage of normal cells was unaffected, whereas cancerous cells were decreased greatly by dibromosterculic acid with 50% survivability at 9 µg/ml concentration. Molecular-docking using AutoDock 4.2 with Bax exhibited strong pi-sigma interaction with PHE-93, pi-alkyl and alkyl interaction with TRP-139, ARG-89 and PHE-92 whereas MDM2 revealed strong hydrogen bond interaction with GLN-59 and pi-alkyl interaction with PHE-55. All experimental parameters suggested that this synthetic derivative would be valuable for target-specific drug development with nominal side effects.
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Affiliation(s)
- Rahul Bose
- Agricultural and Ecological Research Unit, Indian Statistical Institute, Kolkata, India
| | - Ayan Paul
- Agricultural and Ecological Research Unit, Indian Statistical Institute, Kolkata, India
| | - Rajashree Dutta
- Agricultural and Ecological Research Unit, Indian Statistical Institute, Kolkata, India
| | - Anjan Hazra
- Agricultural and Ecological Research Unit, Indian Statistical Institute, Kolkata, India
| | - Arindam Pramanik
- School of Medicine, University of Leeds, United Kingdom
- Amity Institute of Biotechnology, Amity University, Uttar Pradesh, India
| | - Suparna Mandal Biswas
- Agricultural and Ecological Research Unit, Indian Statistical Institute, Kolkata, India
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Alreqeb S, Ergüden B. Chalcone derivatives disrupt cell membrane integrity of Saccharomyces cerevisiae cells and alter their biochemical composition. Arch Microbiol 2023; 206:34. [PMID: 38133819 DOI: 10.1007/s00203-023-03747-x] [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: 09/29/2023] [Revised: 11/10/2023] [Accepted: 11/15/2023] [Indexed: 12/23/2023]
Abstract
Fungal infections can be serious or life threatening in severe cases, and the need to discover and find novel antifungal agents persists. Chalcones are plant-derived aromatic compounds that have been appealing synthons for pharmaceutical industry as they have good anticancer, antibacterial, antifungal and anti-inflammatory properties. Although there are few structure-activity relationship studies on chalcones, studies that link the structural features of these compounds to their mode of action are scant. Thus, in this study, we aim to clarify the relationship between chalcone derivatives and their cellular target within the yeast cell Saccharomyces cerevisiae. We observed that some chalcone compounds lead to disruption of cell membrane and cause ion leakage out of the cell. Moreover, chalcones alter the biochemical composition of yeast cells detectable by FTIR spectroscopy and bind to the DNA as shown by our titration experiments based on UV-Vis absorbance spectroscopy. Thus, their interaction with the DNA may be the major impact of these compounds on yeast cells.
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Affiliation(s)
- Sondos Alreqeb
- Department of Bioengineering, Gebze Technical University, 41400, Kocaeli, Turkey
| | - Bengü Ergüden
- Department of Bioengineering, Gebze Technical University, 41400, Kocaeli, Turkey.
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Faleye OS, Lee JH, Lee J. Selected flavonoids exhibit antibiofilm and antibacterial effects against Vibrio by disrupting membrane integrity, virulence and metabolic activities. Biofilm 2023; 6:100165. [PMID: 38034415 PMCID: PMC10681883 DOI: 10.1016/j.bioflm.2023.100165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 10/31/2023] [Accepted: 11/01/2023] [Indexed: 12/02/2023] Open
Abstract
Vibrio parahaemolyticus is a high-risk foodborne pathogen associated with raw or undercooked seafoods and its biofilm forming potential has become a threat to food safety and economic values. Hence, this study aims to examine the antibacterial and antibiofilm activities as well as virulence inhibitory effects of selected flavonoids against V. parahaemolyticus. Out of the sixteen flavonoid derivatives, 6-aminoflavone (6-AF), 3,2-dihydroxyflavone (3,2-DHF) and 2,2-dihydroxy-4-methoxybenzophenone (DHMB) were found as active biofilm inhibitors. 3,2-DHF and DHMB had minimum inhibitory concentrations of 20 and 50 μg/mL respectively against Vibrio planktonic cells and displayed superior antibacterial activities to standard controls. Also, they disrupted preformed biofilms and suppressed virulence properties including motilities, cell hydrophobicity and aggregation. They impaired iron acquisition mechanism and hemolysin production at sub-MICs as supported by transcriptomic studies. Interestingly, the flavonoids interfered with the metabolic activity, cell division and membrane permeability to exert antibiofilm and antibacterial activities. 6-AF and 3,2-DHF were non-toxic in the C. elegans model and showed excellent capacity to protect shrimps from biodeterioration. Furthermore, the flavonoids inhibited biofilm formation by V. harveyi, Staphylococcus aureus and Salmonella typhimurium and the mixed-species biofilm with Vibrio. This study discovered flavonoid derivatives, especially 3,2-DHF as potential bioactive compounds capable of offering protection from risks associated with biofilm formation by V. parahaemolyticus and other food pathogens.
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Affiliation(s)
- Olajide Sunday Faleye
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, 38541, Republic of Korea
| | - Jin-Hyung Lee
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, 38541, Republic of Korea
| | - Jintae Lee
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, 38541, Republic of Korea
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Malek-Esfandiari Z, Rezvani-Noghani A, Sohrabi T, Mokaberi P, Amiri-Tehranizadeh Z, Chamani J. Molecular Dynamics and Multi-Spectroscopic of the Interaction Behavior between Bladder Cancer Cells and Calf Thymus DNA with Rebeccamycin: Apoptosis through the Down Regulation of PI3K/AKT Signaling Pathway. J Fluoresc 2023; 33:1537-1557. [PMID: 36787038 DOI: 10.1007/s10895-023-03169-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Accepted: 02/03/2023] [Indexed: 02/15/2023]
Abstract
The interaction of Rebeccamycin with calf thymus (ctDNA) in the absence and presence of H1 was investigated by molecular dynamics, multi-spectroscopic, and cellular techniques. According to fluorescence and circular dichroism spectroscopies, Rebeccamycin interacted with ctDNA in the absence of H1 through intercalator or binding modes, while the presence of H1 resulted in revealing theintercalator, as the dominant role, and groove binding modes of ctDNA-Rebeccamycin complex. The binding constants, which were calculated to be 1.22 × 104 M-1 and 7.92 × 105 M-1 in the absence and presence of H1, respectively, denoted the strong binding of Rebeccamycin with ctDNA. The binding constants of Rebeccamycin with ct DNA in the absence and presence of H1 were calculated at 298, 303 and 308 K. Considering the thermodynamic parameters (ΔH0 and ΔS0), both vander waals forces and hydrogen bonds played predominant roles throughout the binding of Rebeccamycin to ctDNA in the absence and presence of H1. The outcomes of circular dichroism suggested the lack of any major conformational changes in ctDNA upon interacting with Rebeccamycin, except some perturbations in native B-DNA at local level. Additionally, the effect of NaCl and KI on ctDNA-Rebeccamycin complex provided further evidence for the reliance of their interaction modes on substituted groups. The observed increase in the relative viscosity of ctDNA caused by the enhancement of Rebeccamycin confirmed their intercalation and groove binding modes in the absence and presence of H1. Moreover, the assessments of molecular docking simulation corroborated these experimental results and also elucidated the effectiveness of Rebeccamycinin inhibiting and proliferating T24 and 5637 cells. Meanwhile, the ability of Rebeccamycin in inhibiting cell proliferation and tumor growth through the induction of apoptosis by down regulating the PI3K/AKT signaling pathway were provided.
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Affiliation(s)
- Zohreh Malek-Esfandiari
- Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Azadeh Rezvani-Noghani
- Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Tahmineh Sohrabi
- Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Parisa Mokaberi
- Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Zeinab Amiri-Tehranizadeh
- Medical Chemistry Department, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Jamshidkhan Chamani
- Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran.
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Dehkordi MF, Farhadian S, Hashemi-Shahraki F, Rahmani B, Darzi S, Dehghan G. The interaction mechanism of candidone with calf thymus DNA: A multi-spectroscopic and MD simulation study. Int J Biol Macromol 2023; 235:123713. [PMID: 36801300 DOI: 10.1016/j.ijbiomac.2023.123713] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 02/11/2023] [Accepted: 02/11/2023] [Indexed: 02/18/2023]
Abstract
In this investigation, the effects of candidone on the structure and conformation of DNA were evaluated by spectroscopic methods, molecular dynamics simulation, and molecular docking studies. Fluorescence emission peaks, ultraviolet-visible spectra, and molecular docking exhibited the complex formation between candidone and DNA in a groove-binding mode. Fluorescence spectroscopy results also showed a static quenching mechanism of DNA in the presence of candidone. Moreover, thermodynamic parameters demonstrated that candidone spontaneously bound to DNA with a high binding affinity. The hydrophobic interactions were the dominant forces over the binding process. Based on the Fourier transform infrared data candidone tended to attach to the A-T base pairs of the minor grooves of DNA. The thermal denaturation and circular dichroism measurements displayed that candidone caused a slight change in the DNA structure, which was confirmed by the molecular dynamics simulation results. According to the obtained findings from the molecular dynamic simulation, the structural flexibility and dynamics of DNA were altered to a more extended structure.
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Affiliation(s)
- Mahvash Farajzadeh Dehkordi
- Department of Molecular Medicine, Qazvin University of Medical Sciences, Qazvin, Iran; Student Research Committee, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Sadegh Farhadian
- Department of Biology, Faculty of Science, Shahrekord University, Shahrekord, Iran; Central Laboratory, Shahrekord University, Shahrekord, Iran.
| | - Fatemeh Hashemi-Shahraki
- Department of Biology, Faculty of Science, Shahrekord University, Shahrekord, Iran; Central Laboratory, Shahrekord University, Shahrekord, Iran
| | - Babak Rahmani
- Department of Molecular Medicine, Qazvin University of Medical Sciences, Qazvin, Iran; Student Research Committee, Qazvin University of Medical Sciences, Qazvin, Iran.
| | - Sina Darzi
- Health Products Safety Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Gholamreza Dehghan
- Department of Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran
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Jin L, Gao Y, Sun Z, Jia Y, Shen B, Li X, Geng Q, Mu X. Study on the Interaction between Chalcone and DNA with Spectroscopy and Molecular Docking Technique. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2133946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Lihong Jin
- School of Life Science and Technology, Changchun University of Science and Technology, Changchun, PR China
| | - Yan Gao
- School of Life Science and Technology, Changchun University of Science and Technology, Changchun, PR China
| | - Zihan Sun
- School of Life Science and Technology, Changchun University of Science and Technology, Changchun, PR China
| | - Yi Jia
- School of Life Science and Technology, Changchun University of Science and Technology, Changchun, PR China
| | - Bingjun Shen
- School of Life Science and Technology, Changchun University of Science and Technology, Changchun, PR China
| | - Xiaosha Li
- School of Life Science and Technology, Changchun University of Science and Technology, Changchun, PR China
| | - Qi Geng
- School of Life Science and Technology, Changchun University of Science and Technology, Changchun, PR China
| | - Xiaoyu Mu
- School of Life Science and Technology, Changchun University of Science and Technology, Changchun, PR China
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Ponkarpagam S, Vennila KN, Elango KP. Molecular spectroscopic and molecular simulation studies on the interaction of oral contraceptive drug Ormeloxifene with CT-DNA. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 278:121351. [PMID: 35567820 DOI: 10.1016/j.saa.2022.121351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/30/2022] [Accepted: 05/03/2022] [Indexed: 06/15/2023]
Abstract
The interaction between oral contraceptive drug Ormeloxifene (ORM) and calf thymus DNA (CT-DNA) was studied using UV-Vis, fluorescence, circular dichroism (CD) and 1H NMR spectral techniques under physiological buffer (pH 7.4). Competitive binding assays with ethidium bromide (EB) and Hoechst 33258, viscosity measurements, KI quenching studies, molecular docking and metadynamics simulation studies were also substantiated the spectroscopic results. ORM is found to binds in the minor groove of CT-DNA as evidenced by: (1) non-displacement of EB from EB/CT-DNA complex; (2) appreciable displacement of Hoechst 33258 from its CT-DNA complex; (3) slight alteration in the CD signal; (4) small shifts (Δδ < 0.033 ppm) without broadening in 1H NMR signals and (5) the nearly equal extent of quenching of fluorescence of ORM by KI in the absence and presence of CT-DNA. Negative values of both enthalpy and entropy changes pointed out that the interaction between ORM and CT-DNA is governed mainly by H-bonding and van der Waals forces. Negative free energy change suggested a spontaneous interaction between ORM and CT-DNA. The free energy landscape of the binding process was computed using metadynamics simulation. The simulation study results disclosed that ORM binds to the minor groove of DNA through H-bonding and π-π stacking interactions. The results of molecular docking and simulation studies corroborate the available experimental data.
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Affiliation(s)
- S Ponkarpagam
- Department of Chemistry, Gandhigram Rural Institute (Deemed to be University), Gandhigram 624302, India
| | - K N Vennila
- Department of Chemistry, Gandhigram Rural Institute (Deemed to be University), Gandhigram 624302, India
| | - Kuppanagounder P Elango
- Department of Chemistry, Gandhigram Rural Institute (Deemed to be University), Gandhigram 624302, India.
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Multi-spectroscopic, thermodynamic, and molecular docking/dynamic approaches for characterization of the binding interaction between calf thymus DNA and palbociclib. Sci Rep 2022; 12:14723. [PMID: 36042232 PMCID: PMC9427788 DOI: 10.1038/s41598-022-19015-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 08/23/2022] [Indexed: 12/02/2022] Open
Abstract
Studying the binding interaction between biological macromolecules and small molecules has formed the core of different research aspects. The interaction of palbociclib with calf thymus DNA at simulated physiological conditions (pH 7.4) was studied using different approaches, including spectrophotometry, spectrofluorimetry, FT-IR spectroscopy, viscosity measurements, ionic strength measurements, thermodynamic, molecular dynamic simulation, and docking studies. The obtained findings showed an apparent binding interaction between palbociclib and calf thymus DNA. Groove binding mode was confirmed from the findings of competitive binding studies with ethidium bromide or rhodamine B, UV–Vis spectrophotometry, and viscosity assessment. The binding constant (Kb) at 298 K calculated from the Benesi–Hildebrand equation was found to be 6.42 × 103 M−1. The enthalpy and entropy changes (∆H0 and ∆S0) were − 33.09 kJ mol−1 and 61.78 J mol−1 K−1, respectively, showing that hydrophobic and hydrogen bonds constitute the primary binding forces. As indicated by the molecular docking results, palbociclib fits into the AT-rich region of the B-DNA minor groove with four base pairs long binding site. The dynamic performance and stability of the formed complex were also evaluated using molecular dynamic simulation studies. The in vitro study of the intermolecular binding interaction of palbociclib with calf thymus DNA could guide future clinical and pharmacological studies for the rational drug scheming with enhanced or more selective activity and greater efficacy.
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Dutta N, Pemmaraju DB, Ghosh S, Ali A, Mondal A, Majumder C, Nelson VK, Mandal SC, Misra AK, Rengan AK, Ravichandiran V, Che CT, Gurova KV, Gudkov AV, Pal M. Alkaloid-rich fraction of Ervatamia coronaria sensitizes colorectal cancer through modulating AMPK and mTOR signalling pathways. JOURNAL OF ETHNOPHARMACOLOGY 2022; 283:114666. [PMID: 34592338 DOI: 10.1016/j.jep.2021.114666] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 09/12/2021] [Accepted: 09/19/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Ervatamia coronaria, a popular garden plant in India and some other parts of the world is known traditionally for its anti-inflammatory and anti-cancer properties. The molecular bases of these functions remain poorly understood. AIM OF THE STUDY Efficacies of the existing therapies for colorectal cancer (CRC) are limited by their life-threatening side effects and unaffordability. Therefore, identifying a safer, efficient, and affordable therapeutic is urgent. We studied the anti-CRC activity of an alkaloid-rich fraction of E. coronaria leaf extracts (AFE) and associated underlying mechanism. MATERIALS AND METHODS Activity guided solvant fractionation was adopted to identify the activity in AFE. Different cell lines, and tumor grown in syngeneic mice were used to understand the anti-CRC effect. Methodologies such as LCMS, MTT, RT-qPCR, immunoblot, immunohistochemistry were employed to understand the molecular basis of its activity. RESULTS We showed that AFE, which carries about six major compounds, is highly toxic to colorectal cancer (CRC) cells. AFE induced cell cycle arrest at G1 phase and p21 and p27 genes, while those of CDK2, CDK-4, cyclin-D, and cyclin-E genes were downregulated in HCT116 cells. It predominantly induced apoptosis in HCT116p53+/+ cells while the HCT116p53-/- cells under the same treatment condition died by autophagy. Notably, AFE induced upregulation of AMPK phosphorylation, and inhibition of both of the mTOR complexes as indicated by inhibition of phosphorylation of S6K1, 4EBP1, and AKT. Furthermore, AFE inhibited mTOR-driven conversion of cells from reversible cell cycle arrest to senescence (geroconversion) as well as ERK activity. AFE activity was independent of ROS produced, and did not primarily target the cellular DNA or cytoskeleton. AFE also efficiently regressed CT26-derived solid tumor in Balb/c mice acting alone or in synergy with 5FU through inducing autophagy as a major mechanism of action as indicated by upregulation of Beclin 1 and phospho-AMPK, and inhibition of phospho-S6K1 levels in the tumor tissue lysates. CONCLUSION AFE induced CRC death through activation of both apoptotic and autophagy pathways without affecting the normal cells. This study provided a logical basis for consideration of AFE in future therapy regimen to overcome the limitations associated with existing anti-CRC chemotherapy.
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Affiliation(s)
- Naibedya Dutta
- Division of Molecular Medicine, Bose Institute, Kolkata, India
| | - Deepak Bharadwaj Pemmaraju
- Division of Molecular Medicine, Bose Institute, Kolkata, India; Department of Biomedical Engineering, IIT, Hyderabad, India
| | - Suvranil Ghosh
- Division of Molecular Medicine, Bose Institute, Kolkata, India
| | - Asif Ali
- Division of Molecular Medicine, Bose Institute, Kolkata, India
| | - Ayan Mondal
- Division of Molecular Medicine, Bose Institute, Kolkata, India
| | | | - Vinod K Nelson
- Department of Pharmaceutical Technology, Jadavpur University, Kolkata, India
| | - Subhash C Mandal
- Department of Pharmaceutical Technology, Jadavpur University, Kolkata, India
| | - Anup K Misra
- Division of Molecular Medicine, Bose Institute, Kolkata, India
| | | | | | - Chun-Tao Che
- Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, USA
| | - Katerina V Gurova
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY, USA
| | - Andrei V Gudkov
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY, USA
| | - Mahadeb Pal
- Division of Molecular Medicine, Bose Institute, Kolkata, India.
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