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Nanjundaswamy S, Bindhu S, Arun Renganathan RR, Nagashree S, Karthik CS, Mallu P, Ravishankar Rai V. Design, synthesis of pyridine coupled pyrimidinone/pyrimidinthione as anti-MRSA agent: Validation by molecular docking and dynamics simulation. J Biomol Struct Dyn 2022; 40:12106-12117. [PMID: 34424132 DOI: 10.1080/07391102.2021.1968496] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Methicillin Resistant Staphylococcus aureus (MRSA) is a major cause of severe hospital and infections acquired by the population and related morbidity and mortality. In this unique situation, there is a need of dynamic strong drug candidates to control MRSA diseases. Thus, the present work focuses on the synthesis and characterization of pyrimidinones and pyrimidinthiones coupled pyridine derivatives as anti-MRSA agent. The synthesized compounds were characterized by different spectroscopic techniques and evaluated against MRSA strain. Among them, 4e and 4 g possessed better antibacterial activity with MIC values of 10 μg and 8 μg respectively. The key determinant of the wide range beta-lactam resistance in MRSA strains is the Penicillin-Binding Protein 2a (PBP2a) but the gene encodes PBP2a which has a low affinity towards β-lactam antibiotics. Because of this, the present investigation focused on the mechanism of PBP2a protein binding studies by in-silico studies. The synthesized compounds showed very good interactions with PBP2A compared with standard drug Vancomycin, among them compound 4 g showed better interaction with the binding score of -9.8 kcal/mol. Antibacterial activity was validated with molecular docking and molecular dynamic simulation. Simulation results revealed that protein-ligand interactions of 4 g compound stably sustained up to 20,000ps.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- S Nanjundaswamy
- Department of Chemistry, SJCE, JSS Science and Technology University, Mysuru, Karnataka, India
| | - S Bindhu
- Department of Chemistry, SJCE, JSS Science and Technology University, Mysuru, Karnataka, India
| | - R R Arun Renganathan
- Department of Studies in Microbiology, University of Mysore, Mysuru, Karnataka, India
| | - S Nagashree
- Department of Chemistry, SJCE, JSS Science and Technology University, Mysuru, Karnataka, India
| | - C S Karthik
- Department of Chemistry, SJCE, JSS Science and Technology University, Mysuru, Karnataka, India
| | - P Mallu
- Department of Chemistry, SJCE, JSS Science and Technology University, Mysuru, Karnataka, India
| | - V Ravishankar Rai
- Department of Studies in Microbiology, University of Mysore, Mysuru, Karnataka, India
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Nanjundaswamy S, Jayashankar J, Chethana M, Renganathan RA, Karthik C, Ananda A, Nagashree S, Mallu P, Rai VR. Design, synthesis, and in-silico studies of pyrazolylpyridine analogues: A futuristic antibacterial contender against coagulase positive superbug-MRSA. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Prasad HN, Ananda A, Najundaswamy S, Nagashree S, Mallesha L, Dayananda B, Jayanth H, Mallu P. Design, synthesis and molecular docking studies of novel piperazine metal complexes as potential antibacterial candidate against MRSA. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130047] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Karthik CS, Chethana MH, Manukumar HM, Ananda AP, Sandeep S, Nagashree S, Mallesha L, Mallu P, Jayanth HS, Dayananda BP. Synthesis and characterization of chitosan silver nanoparticle decorated with benzodioxane coupled piperazine as an effective anti-biofilm agent against MRSA: A validation of molecular docking and dynamics. Int J Biol Macromol 2021; 181:540-551. [PMID: 33766592 DOI: 10.1016/j.ijbiomac.2021.03.119] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/19/2021] [Accepted: 03/21/2021] [Indexed: 12/11/2022]
Abstract
Biomaterial research has improved the delivery and efficacy of drugs over a wide range of pharmaceutical applications. The objective of this study was to synthesize benzodioxane coupled piperazine decorated chitosan silver nanoparticle (Bcp*C@AgNPs) against methicillin-resistant Staphylococcus aureus (MRSA) and to assess the nanoparticle as an effective candidate for antibacterial and anti-biofilm care. Antibacterial activity of the compound was examined and minimum inhibitory concentration (MIC) was observed at (10.21 ± 0.03 ZOI) a concentration of 200 μg/mL. The Bcp*C@AgNPs interferes with surface adherence of MRSA, suggesting an anti-biofilm distinctive property that is verified for the first time by confocal laser microscopic studies. By ADMET studies the absorption, distribution, metabolism, excretion and toxicity of the compound was examined. The interaction solidity and the stability of the compound when surrounded by water molecules were analyzed by docking and dynamic simulation analysis. The myoblast cell line (L6) was considered for toxicity study and was observed that the compound exhibited less toxic effect. This current research highlights the biocidal efficiency of Bcp*C@AgNPs with their bactericidal and anti-biofilm properties over potential interesting clinical trial targets in future.
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Affiliation(s)
- C S Karthik
- Department of Chemistry, SJCE, JSS Science and Technology University, Mysuru 570 006, Karnataka, India
| | - M H Chethana
- Department of Chemistry, SJCE, JSS Science and Technology University, Mysuru 570 006, Karnataka, India
| | - H M Manukumar
- Department of Chemistry, SJCE, JSS Science and Technology University, Mysuru 570 006, Karnataka, India
| | - A P Ananda
- Ganesh Consultancy and Analytical Services, Hebbal Industrial Area, Mysuru 570016, Karnataka, India
| | - S Sandeep
- Department of Chemistry, SJCE, JSS Science and Technology University, Mysuru 570 006, Karnataka, India
| | - S Nagashree
- Department of Chemistry, SJCE, JSS Science and Technology University, Mysuru 570 006, Karnataka, India
| | - L Mallesha
- PG Department of Chemistry, JSS College of Arts, Commerce and Science, Mysuru 570 025, Karnataka, India
| | - P Mallu
- Department of Chemistry, SJCE, JSS Science and Technology University, Mysuru 570 006, Karnataka, India.
| | - H S Jayanth
- Department of Microbiology, Yuvaraja's College, University of Mysore, Mysuru 570005, Karnataka, India
| | - B P Dayananda
- PG Department of Chemistry, Maharani's College, University of Mysore, Mysuru 570005, Karnataka, India
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Hema M, ArunRenganathan R, Nanjundaswamy S, Karthik C, Mohammed YHI, Alghamdi S, Lokanath N, Ravishankar Rai V, Nagashree S, Mallu P. N-(4-bromobenzylidene)-2,3-dihydrobenzo[b][1,4]dioxin-6-amine: Synthesis, crystal structure, docking and in-vitro inhibition of PLA2. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128441] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Santhosh M, NagendraPrasad H, Nagashree S, Manukumar H, Mallesh L, Mallu P. Synthesis and characterization of Schiff base analogues of fluoroaniline and their antibiocidal activity against MRSA. 10 5267/j ccl 2019. [DOI: 10.5267/j.ccl.2019.4.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Karthik CS, Manukumar HM, Sandeep S, Sudarshan BL, Nagashree S, Mallesha L, Rakesh KP, Sanjay KR, Mallu P, Qin HL. Development of piperazine-1-carbothioamide chitosan silver nanoparticles (P1C-Tit*CAgNPs) as a promising anti-inflammatory candidate: a molecular docking validation. Medchemcomm 2018; 9:713-724. [PMID: 30108962 DOI: 10.1039/c7md00628d] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 03/14/2018] [Indexed: 12/20/2022]
Abstract
Natural products are important leads in drug discovery. The search for effective plant-derived agents or their synthetic analogues has continued to be of interest to biologists and chemists for a long time. Herein, we have synthesized a novel compound, P1C, and P1C-Tit*CAgNPs from chitosan; P1C is a precursor and an anti-inflammatory candidate, which has been validated by molecular docking studies. The synthesized P1C-Tit*CAgNPs showed monodisperse, spherical, and cationic nature and antioxidant properties, protecting destabilization of the erythrocyte membrane by the azo compound 2,2'-azobis(2-amidinopropane)dihydrochloride (AAPH); the involvement of NPs as a protective agent for biomolecules, such as DNA and protein, followed by the treatment of NPs with AAPH was confirmed. The inhibition of cellular damage and leakage of cellular inflammatory agents was confirmed by AFM, SEM, TEM, SDS-PAGE, LDH, and PLA2 enzyme inhibition via in vitro studies. The anti-inflammatory property of P1C was further validated by in silico molecular docking studies and showed that, the P1C best pose aligned to PLA2 compared to standard drug. The significant anticancer property of P1C-Tit*CAgNPs was confirmed against MCF7, U373, and C6 cancer cell lines. Thus, the present study highlights the synthesized P1C in P1C-Tit*CAgNPs as a target PLA2-specific anti-inflammatory candidate, and further tuning of small and development-functionalized nanoparticles has a great future in medicine; hence, their clinical applications are warranted.
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Affiliation(s)
- C S Karthik
- Department of Chemistry , Sri Jayachamarajendra College of Engineering , Mysuru-570 006 , Karnataka , India .
| | - H M Manukumar
- Department of Chemistry , Sri Jayachamarajendra College of Engineering , Mysuru-570 006 , Karnataka , India . .,Department of Studies in Biotechnology , University of Mysore , Manasagangotri , Mysuru-570006 , Karnataka , India
| | - S Sandeep
- Department of Chemistry , Sri Jayachamarajendra College of Engineering , Mysuru-570 006 , Karnataka , India .
| | - B L Sudarshan
- Department of Biotechnology , Sri Jayachamarajendra College of Engineering , Mysuru-570 006 , Karnataka , India
| | - S Nagashree
- Department of Chemistry , Sri Jayachamarajendra College of Engineering , Mysuru-570 006 , Karnataka , India .
| | - L Mallesha
- PG Department of Chemistry , JSS College of Arts, Commerce and Science , Mysuru-570 025 , Karnataka , India
| | - K P Rakesh
- Department of Pharmaceutical Engineering , School of Chemistry, Chemical Engineering and Life Science , Wuhan University of Technology , 205 Luoshi Road , Wuhan , 430073 , PR China . ; ; ; Fax: +86 27 87749300
| | - K R Sanjay
- Department of Biotechnology , Sri Jayachamarajendra College of Engineering , Mysuru-570 006 , Karnataka , India
| | - P Mallu
- Department of Chemistry , Sri Jayachamarajendra College of Engineering , Mysuru-570 006 , Karnataka , India .
| | - Hua-Li Qin
- Department of Pharmaceutical Engineering , School of Chemistry, Chemical Engineering and Life Science , Wuhan University of Technology , 205 Luoshi Road , Wuhan , 430073 , PR China . ; ; ; Fax: +86 27 87749300
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Karthik C, Manukumar H, Ananda A, Nagashree S, Rakesh K, Mallesha L, Qin HL, Umesha S, Mallu P, Krishnamurthy N. Synthesis of novel benzodioxane midst piperazine moiety decorated chitosan silver nanoparticle against biohazard pathogens and as potential anti-inflammatory candidate: A molecular docking studies. Int J Biol Macromol 2018; 108:489-502. [DOI: 10.1016/j.ijbiomac.2017.12.045] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 11/13/2017] [Accepted: 12/06/2017] [Indexed: 10/18/2022]
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Abstract
OBJECTIVE 1. To compare peripheral smear (PS) and Red cell distribution width (RDW) in diagnosis of Iron deficiency anemia (IDA) in various grades. 2. To study the changes in RDW and PS after therapy. METHODS Children in the age group of six months to five years with microcytic (MCV<80fl) anemia (Hemoglobin <11 g%) were evaluated. Those who had received blood transfusion and /or were already on iron therapy were excluded. Evaluation included clinical examination, complete blood count (CBC), RDW estimation microscopic examination of peripheral smear, measurement of serum iron and transferrin saturation. Children with IDA were treated with oral iron for 8 weeks and PS, CBC including RDW were repeated. RESULT Of the 100 children evaluated, 89 had IDA. 48% had mild, 42% had moderate and 10% had severe anemia. Transferrin saturation correlated with severity of anemia. Peripheral smear showed microcytosis and hypochromia in all cases with severe anemia, 61.5% and 22.5% of those with moderate and mild anemia respectively. RDW was suggestive of iron deficiency in 100%, 82.05% and 100% of patient with mild, moderate and severe anemia respectively. CONCLUSION In the diagnosis of mild and moderate iron deficiency anemia, RDW had a higher sensitivity than PS. Red cell morphology, Hb, PCV and RDW showed significant improvement after iron-therapy.
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Affiliation(s)
- D Viswanath
- Department of Pediatrics, M.S. Ramaiah Medical Teaching Hospital, Bangalore, India
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Abstract
OBJECTIVES To assess the validity of SNAP in predicting the outcome in terms of mortality and duration of hospital stay. The study was also undertaken to evolve the best cut-off SNAP scores for predicting mortality in different individual neonatal conditions. METHODS 295 consecutive newborn admitted to NICU during an eleven month period were evaluated with the investigations required as per the specifications of SNAP. Neonates who succumbed within 24 hours of admission and those who were shifted to the NICU for observation purposes were excluded. RESULTS In general, SNAP correlated well with mortality; the sensitivity and specificity of SNAP score > 15 in predicting mortality were 63% and 95% respectively. The positive and negative predictive values were 72% and 92.5% respectively. Very low birth weight babies and ventilated preterm neonates had higher mortality and the best cut-off SNAP score for predicting mortality in these groups was 10. In all the other groups, SNAP score > 15 correlated well with higher mortality. By using multiple regression analysis on three variables including birth weight, gestational age and SNAP, SNAP was found to show the best correlation with mortality. On correlating SNAP with duration of hospital stay, 76.8% of the surviving neonates with SNAP < 16 stayed for < 15 days, whereas the rest stayed longer despite low SNAP. All the 9 babies with SNAP > 15 who survived stayed for > 15 days. CONCLUSIONS SNAP is a measure of illness severity and correlates well with neonatal mortality. SNAP may assist the clinician in explaining the probable outcome and therapeutic intervention needed and the cost of treatment to the parents. SNAP scores > 10 in VLBW babies and > 15 in others are associated with higher mortality.
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Affiliation(s)
- P P Maiya
- Department of Pediatrics, M.S. Ramaiah Medical Teaching Hospital, MS Ramaiah Nagar, MSRIT Post, Bangalore 560 054.
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Abstract
An 8-year-old girl presented with persistent vomiting, pain abdomen and generalized edema. Barium studies and gastroscopy suggested hypertrophic gastropathy. Histopathological examination pointed the diagnosis towards Menetrier's Disease. There was spontaneous remission and the child required only supportive therapy.
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Affiliation(s)
- M Gandhi
- Department of Pediatrics, M.S. Ramaiah Medical Teaching Hospital, Bangalore, India
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