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Ghosh C, Das MC, Acharjee S, Bhattacharjee S, Sandhu P, Kumari M, Bhowmik J, Ghosh R, Banerjee B, De UC, Akhter Y, Bhattacharjee S. Combating Staphylococcus aureus biofilm formation: the inhibitory potential of tormentic acid and 23-hydroxycorosolic acid. Arch Microbiol 2023; 206:25. [PMID: 38108905 DOI: 10.1007/s00203-023-03762-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 11/07/2023] [Accepted: 11/19/2023] [Indexed: 12/19/2023]
Abstract
Plant extracts have been used to treat microbiological diseases for centuries. This study examined plant triterpenoids tormentic acid (TA) and 23-hydroxycorosolic acid (HCA) for their antibiofilm effects on Staphylococcus aureus strains (MTCC-96 and MTCC-7405). Biofilms are bacterial colonies bound by a matrix of polysaccharides, proteins, and DNA, primarily impacting healthcare. As a result, ongoing research is being conducted worldwide to control and prevent biofilm formation. Our research showed that TA and HCA inhibit S. aureus planktonic growth by depolarizing the bacterial membrane. In addition, zone of inhibition studies confirmed their effectiveness, and crystal violet staining and biofilm protein quantification confirmed their ability to prevent biofilm formation. TA and HCA exhibited substantial reductions in biofilm formation for S. aureus (MTCC-96) by 54.85% and 48.6% and for S. aureus (MTCC-7405) by 47.07% and 56.01%, respectively. Exopolysaccharide levels in S. aureus biofilm reduced significantly by TA (25 μg/mL) and HCA (20 μg/mL). Microscopy, bacterial motility, and protease quantification studies revealed their ability to reduce motility and pathogenicity. Furthermore, TA and HCA treatment reduced the mRNA expression of S. aureus virulence genes. In silico analysis depicted a high binding affinity of triterpenoids for biofilm and quorum-sensing associated proteins in S. aureus, with TA having the strongest affinity for TarO (- 7.8 kcal/mol) and HCA for AgrA (- 7.6 kcal/mol). TA and HCA treatment reduced bacterial load in S. aureus-infected peritoneal macrophages and RAW264.7 cells. Our research indicates that TA and HCA can effectively combat S. aureus by inhibiting its growth and suppressing biofilm formation.
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Affiliation(s)
- Chinmoy Ghosh
- Department of Molecular Biology & Bioinformatics, Tripura University (A Central University), Suryamaninagar, Tripura, 799022, India
- School of Biotechnology, KIIT University, Bhubaneswar, Odisha, 751024, India
| | - Manash C Das
- Department of Molecular Biology & Bioinformatics, Tripura University (A Central University), Suryamaninagar, Tripura, 799022, India
| | - Shukdeb Acharjee
- Department of Molecular Biology & Bioinformatics, Tripura University (A Central University), Suryamaninagar, Tripura, 799022, India
| | - Samadrita Bhattacharjee
- Department of Molecular Biology & Bioinformatics, Tripura University (A Central University), Suryamaninagar, Tripura, 799022, India
| | - Padmani Sandhu
- Centre for Computational Biology and Bioinformatics, School of Life Sciences, Central University of Himachal Pradesh, Shahpur, Kangra, Himachal Pradesh, 176206, India
| | - Monika Kumari
- Centre for Computational Biology and Bioinformatics, School of Life Sciences, Central University of Himachal Pradesh, Shahpur, Kangra, Himachal Pradesh, 176206, India
| | - Joyanta Bhowmik
- Department of Chemistry, Tripura University (A Central University), Suryamaninagar, Tripura, 799022, India
| | - Ranjit Ghosh
- Department of Chemistry, Tripura University (A Central University), Suryamaninagar, Tripura, 799022, India
| | | | - Utpal Chandra De
- Department of Chemistry, Tripura University (A Central University), Suryamaninagar, Tripura, 799022, India
| | - Yusuf Akhter
- Department of Biotechnology, Babasaheb Bhimrao Ambedkar University, Vidya Vihar, Raebareli Road, Lucknow, Uttar Pradesh, India
| | - Surajit Bhattacharjee
- Department of Molecular Biology & Bioinformatics, Tripura University (A Central University), Suryamaninagar, Tripura, 799022, India.
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Dinda B, Dinda M, Dinda S, De UC. An overview of anti-SARS-CoV-2 and anti-inflammatory potential of baicalein and its metabolite baicalin: Insights into molecular mechanisms. Eur J Med Chem 2023; 258:115629. [PMID: 37437351 DOI: 10.1016/j.ejmech.2023.115629] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 06/26/2023] [Accepted: 07/06/2023] [Indexed: 07/14/2023]
Abstract
The current Coronavirus Disease 2019 (COVID-19) pandemic, caused by the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), is highly contagious infection that breaks the healthcare systems of several countries worldwide. Till to date, no effective antiviral drugs against COVID-19 infection have reached the market, and some repurposed drugs and vaccines are prescribed for the treatment and prevention of this disease. The currently prescribed COVID-19 vaccines are less effective against the newly emergent variants of concern of SARS-CoV-2 due to several mutations in viral spike protein and obviously there is an urgency to develop new antiviral drugs against this disease. In this review article, we systematically discussed the anti-SARS-CoV-2 and anti-inflammatory efficacy of two flavonoids, baicalein and its 7-O-glucuronide, baicalin, isolated from Scutellaria baicalensis, Oroxylum indicum, and other plants as well as their pharmacokinetics and oral bioavailability, for development of safe and effective drugs for COVID-19 treatment. Both baicalein and baicalin target the activities of viral S-, 3CL-, PL-, RdRp- and nsp13-proteins, and host mitochondrial OXPHOS for suppression of viral infection. Moreover, these compounds prevent sepsis-related inflammation and organ injury by modulation of host innate immune responses. Several nanoformulated and inclusion complexes of baicalein and baicalin have been reported to increase oral bioavailability, but their safety and efficacy in SARS-CoV-2-infected transgenic animals are not yet evaluated. Future studies on these compounds are required for use in clinical trials of COVID-19 patients.
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Affiliation(s)
- Biswanath Dinda
- Department of Chemistry, Tripura University, Suryamaninagar, Agartala, Tripura, India.
| | - Manikarna Dinda
- Department of Biochemistry and Molecular Genetics, University of Virginia, School of Medicine, Charlottesville, VA, USA
| | - Subhajit Dinda
- Department of Chemistry, Government Degree College, Kamalpur, Dhalai, Tripura, India
| | - Utpal Chandra De
- Department of Chemistry, Tripura University, Suryamaninagar, Agartala, Tripura, India
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Das BK, Ghosh S, Gomes A, De UC. Synthesis of silver nanoparticles using aqueous leaf extract of Premna esculenta and in vivo evaluation of its hepatoprotective activity in Swiss albino male mice. INORG NANO-MET CHEM 2023. [DOI: 10.1080/24701556.2023.2181821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
Affiliation(s)
- Bijoy Krishna Das
- Department of Chemistry, Tripura University, Suryamaninagar, India
- Department of Chemistry, Iswar Chandra Vidyasagar College, Belonia, India
| | - Sourav Ghosh
- Department of Physiology, University of Calcutta, Kolkata, India
| | - Antony Gomes
- Department of Physiology, University of Calcutta, Kolkata, India
| | - Utpal Chandra De
- Department of Chemistry, Tripura University, Suryamaninagar, India
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Chakraborty S, Paul B, De UC, Natarajan R, Majumdar S. Water-SDS-[BMIm]Br composite system for one-pot multicomponent synthesis of pyrano[2,3- c]pyrazole derivatives and their structural assessment by NMR, X-ray, and DFT studies. RSC Adv 2023; 13:6747-6759. [PMID: 36860543 PMCID: PMC9969234 DOI: 10.1039/d3ra00137g] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 02/16/2023] [Indexed: 03/03/2023] Open
Abstract
Here, we report a simple, efficient, and green protocol for the one-pot synthesis of pyrano[2,3-c]pyrazole derivatives via a sequential three-component strategy using aromatic aldehydes, malononitrile and pyrazolin-5-one in a water-SDS-ionic liquid system. This is a base and volatile organic solvent-free approach that could be applicable to a wide substrate scope. The key advantages of the method over other established protocols are very high yield, eco-friendly conditions, chromatography-free purification and recyclability of the reaction medium. Our study revealed that the N-substituent present in pyrazolinone controls the selectivity of the process. N-unsubstituted pyrazolinone favours the formation of 2,4-dihydro pyrano[2,3-c]pyrazoles whereas under identical conditions N-phenyl substituent pyrazolinone favours the formation 1,4-dihydro pyrano[2,3-c]pyrazoles. Structures of the synthesized products were established by NMR and X-ray diffraction techniques. Energy optimized structures and energy gaps between the HOMO-LUMO of some selected compounds were estimated using density functional theory to explain the extra stability of the 2,4-dihydro pyrano[2,3-c]pyrazoles over 1,4-dihydro pyrano[2,3-c]pyrazoles.
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Affiliation(s)
- Sourav Chakraborty
- Department of Chemistry, Tripura University Suryamaninagar 799 022 India +91-381-2374802 +91-381-237-9070
| | - Bhaswati Paul
- CSIR-Indian Institute of Chemical Biology4,Raja S. C. Mullick RoadKolkata 700 032India
| | - Utpal Chandra De
- Department of Chemistry, Tripura University Suryamaninagar 799 022 India +91-381-2374802 +91-381-237-9070
| | - Ramalingam Natarajan
- CSIR-Indian Institute of Chemical Biology4,Raja S. C. Mullick RoadKolkata 700 032India
| | - Swapan Majumdar
- Department of Chemistry, Tripura University Suryamaninagar 799 022 India +91-381-2374802 +91-381-237-9070
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Parvin M, Rahaman A, Sarkar A, Debnath S, De UC, Mandal DP, Bhattacharjee S. Oroxylum indicum Stem Bark Extract Reduces Tumor Progression by Inhibiting the EGFR-PI3K-AKT Pathway in an In Vivo 4NQO-Induced Oral Cancer Model. J Am Nutr Assoc 2022:1-15. [PMID: 35984397 DOI: 10.1080/27697061.2022.2107583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 07/24/2022] [Accepted: 07/26/2022] [Indexed: 06/15/2023]
Abstract
OBJECTIVES Oral squamous cell carcinoma (OSCC) is the predominant type of oral cancer. Its incidence is high in certain geographic regions, and it is correlated with chewing tobacco. Epidermal growth factor receptor (EGFR), induced by tobacco carcinogens, is overexpressed in OSCC, leading to poor prognosis. Thus, EGFR inhibitors are promising agents against OSCC. High cost and toxicity of existing EGFR inhibitors necessitate alternative EGFR-targeted therapy. Here, we tested the antitumor potential of ethyl acetate fraction of an ethnomedicinal tree, Oroxylum indicum stem bark extract (OIEA) in a 4-nitroquinoline-1-oxide (4NQO)-induced oral carcinogenesis model. METHODS OIEA was prepared by solvent extraction method, and subsequently its in vitro radical scavenging activities were measured. High-performance liquid chromatography (HPLC) analysis of OIEA was done to identify the constituent active compounds. Hemolytic, trypan blue exclusion, and MTT [3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide] assays were performed in normal and cancer cells to select an optimum dose of OIEA for antitumor activity study in 4NQO-induced oral cancer in F344 rats. Measurement of tumor volume, weight, and cell count was followed by tumor cell cycle analysis and comet and annexin V/Propidium Iodide (PI) assay. Pro-apoptotic markers were detected by western blot testing. Molecular docking was done to predict the interaction between OIEA active component and EGFR or phosphatidylinositol-3-kinase (PI3K), which was further validated biologically. Finally, hepatic and renal function testing and histopathology were performed. RESULTS OIEA reduced tumor burden and increased survivability of the tumor-bearing rats significantly as compared to untreated tumor bearers. HPLC revealed oroxylin A as the predominant bioactive component in OIEA. Molecular docking predicted significant binding between oroxylin A and EGFR as well as PI3K, which was confirmed by western blot analysis of in vivo samples. OIEA also ameliorated hepato-, renal- and myelotoxicity induced by 4NQO. CONCLUSION OIEA reduces 4NQO-induced OSCC by modulating the EGFR/PI3K/AKT signaling cascade and also ameliorated toxicity in tumor bearers.
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Affiliation(s)
- Munia Parvin
- Department of Zoology, West Bengal State University, Kolkata, West Bengal, India
| | - Ashikur Rahaman
- Department of Zoology, West Bengal State University, Kolkata, West Bengal, India
| | - Arnab Sarkar
- Department of Zoology, West Bengal State University, Kolkata, West Bengal, India
| | - Sudhan Debnath
- Department of Chemistry, N.S. Mahavidyalaya, Udaipur, Tripura, India
| | - Utpal Chandra De
- Department of Chemistry, Tripura University, Agartala, Tripura, India
| | - Deba Prasad Mandal
- Department of Zoology, West Bengal State University, Kolkata, West Bengal, India
| | - Shamee Bhattacharjee
- Department of Zoology, West Bengal State University, Kolkata, West Bengal, India
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Ghosh C, Bhowmik J, Ghosh R, Das MC, Sandhu P, Kumari M, Acharjee S, Daware AV, Akhter Y, Banerjee B, De UC, Bhattacharjee S. The anti-biofilm potential of triterpenoids isolated from Sarcochlamys pulcherrima (Roxb.) Gaud. Microb Pathog 2019; 139:103901. [PMID: 31790796 DOI: 10.1016/j.micpath.2019.103901] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 11/23/2019] [Accepted: 11/28/2019] [Indexed: 10/25/2022]
Abstract
Formation of biofilm is the major cause of Pseudomonas aeruginosa associated pathological manifestations in the urinary tract, respiratory system, gastrointestinal tract, skin, soft tissues etc. Triterpenoid group of compounds have shown their potential in reducing planktonic and biofilm form of bacteria. Sarcochlamys pulcherrima (Roxb.) Gaud. is an ethnomedicinal plant traditionally used for its anti-microbial and anti-inflammatory property. In the present study two triterpenoids, have been isolated from this plant, characterised and evaluated for their antibacterial and antibiofilm potential against P. aeruginosa. Compounds were characterised as 2α, 3β, 19α-trihydroxy-urs-12-ene-28-oic acid (Tormentic acid) and 2α, 3β, 23-trihydroxyurs-12-ene-28-oic acid (23-hydroxycorosolic acid) through spectroscopic studies viz. infrared (IR), nuclear magnetic resonance (NMR) and mass spectroscopy (MS). Depolarization of bacterial membrane and zone of inhibition studies revealed that both the compounds inhibited the growth of planktonic bacteria. Compounds were also found to inhibit the formation of P. aeruginosa biofilm. Inhibition of biofilm found to be mediated through suppressed secretion of pyoverdin, protease and swarming motility of P. aeruginosa. Gene expression study, in silico binding analysis, in vivo bacterial load and tissue histology observations also supported the antibiofilm activity of both the compounds. In vitro and in vivo study showed that both compounds were non-toxic. The study has explored the antibacterial and antibiofilm effect of two triterpenes isolated for the first time from S. pulcherrima.
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Affiliation(s)
- Chinmoy Ghosh
- Department of Molecular Biology & Bioinformatics, Tripura University, Suryamaninagar, 799022, Tripura, India; Molecular Stress and Stem Cell Biology Lab, School of Biotechnology, Kalinga Institute of Industrial Technology (KIIT), Bhubaneswar, 751024, Odisha, India
| | - Joyanta Bhowmik
- Department of Chemistry, Tripura University, Suryamaninagar, 799022, Tripura, India
| | - Ranjit Ghosh
- Department of Chemistry, Tripura University, Suryamaninagar, 799022, Tripura, India
| | - Manash C Das
- Department of Molecular Biology & Bioinformatics, Tripura University, Suryamaninagar, 799022, Tripura, India
| | - Padmani Sandhu
- Centre for Computational Biology and Bioinformatics, School of Life Sciences, Central University of Himachal Pradesh, Shahpur, District-Kangra, Himachal Pradesh, 176206, India
| | - Monika Kumari
- Centre for Computational Biology and Bioinformatics, School of Life Sciences, Central University of Himachal Pradesh, Shahpur, District-Kangra, Himachal Pradesh, 176206, India
| | - Shukdeb Acharjee
- Department of Molecular Biology & Bioinformatics, Tripura University, Suryamaninagar, 799022, Tripura, India
| | - Akshay Vishnu Daware
- Department of Molecular Biology & Bioinformatics, Tripura University, Suryamaninagar, 799022, Tripura, India
| | - Yusuf Akhter
- Department of Biotechnology, Babasaheb Bhimrao Ambedkar University, Vidya Vihar, Raebareli Road, Lucknow, Uttar Pradesh, 226025, India
| | - Birendranath Banerjee
- Molecular Stress and Stem Cell Biology Lab, School of Biotechnology, Kalinga Institute of Industrial Technology (KIIT), Bhubaneswar, 751024, Odisha, India
| | - Utpal Chandra De
- Department of Chemistry, Tripura University, Suryamaninagar, 799022, Tripura, India.
| | - Surajit Bhattacharjee
- Department of Molecular Biology & Bioinformatics, Tripura University, Suryamaninagar, 799022, Tripura, India.
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Manupati K, Dhoke NR, Debnath T, Yeeravalli R, Guguloth K, Saeidpour S, De UC, Debnath S, Das A. Inhibiting epidermal growth factor receptor signalling potentiates mesenchymal–epithelial transition of breast cancer stem cells and their responsiveness to anticancer drugs. FEBS J 2017; 284:1830-1854. [DOI: 10.1111/febs.14084] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 03/27/2017] [Accepted: 04/07/2017] [Indexed: 12/22/2022]
Affiliation(s)
- Kanakaraju Manupati
- Centre for Chemical Biology CSIR‐Indian Institute of Chemical Technology Hyderabad India
- Academy of Scientific & Innovative Research New Delhi India
| | - Neha R. Dhoke
- Centre for Chemical Biology CSIR‐Indian Institute of Chemical Technology Hyderabad India
- Academy of Scientific & Innovative Research New Delhi India
| | - Tanusree Debnath
- Department of Chemistry Maharaja Bir Bikram College Agartala Tripura India
| | - Ragini Yeeravalli
- Centre for Chemical Biology CSIR‐Indian Institute of Chemical Technology Hyderabad India
- Academy of Scientific & Innovative Research New Delhi India
| | - Kalpana Guguloth
- Centre for Chemical Biology CSIR‐Indian Institute of Chemical Technology Hyderabad India
| | - Shahrzad Saeidpour
- Centre for Chemical Biology CSIR‐Indian Institute of Chemical Technology Hyderabad India
| | - Utpal Chandra De
- Department of Chemistry Tripura University Agartala Tripura India
| | - Sudhan Debnath
- Department of Chemistry Maharaja Bir Bikram College Agartala Tripura India
| | - Amitava Das
- Centre for Chemical Biology CSIR‐Indian Institute of Chemical Technology Hyderabad India
- Academy of Scientific & Innovative Research New Delhi India
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Patra K, Jana S, Sarkar A, Karmakar S, Jana J, Gupta M, Mukherjee G, De UC, Mandal DP, Bhattacharjee S. Parkia javanica Extract Induces Apoptosis in S-180 Cells via the Intrinsic Pathway of Apoptosis. Nutr Cancer 2016; 68:689-707. [PMID: 27144503 DOI: 10.1080/01635581.2016.1158298] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Parkia javanica is a leguminous tree, various parts of which are used as food and folklore medicine by the ethnic groups of northeastern India. The present study investigates the in vitro and in vivo anticancer effect of aqueous methanol extract of P. javanica fruit (PJE). HPLC analysis was done to establish the fingerprint chromatogram of PJE and its in vitro radical scavenging activity was measured. PJE caused significant cytotoxicity in sarcoma-180 (S-180), A549, AGS, and MDA-MB435S cancer cells in vitro. Exploration of the mechanistic details in S-180 cells suggested that the reduced cell viability was mediated by induction of apoptosis. Increased expression of proapoptotic proteins such as p53, p21, Bax/Bcl2, cytochrome c (Cyt c), caspase 9, and cleaved poly(ADP-ribose) polymerase, and decrease in proliferative and antiapoptotic markers (Ki-67, Proliferating Cell Nuclear Antigen [PCNA], Bcl-2) validated the anticancer effect of PJE. A decline in the relative fluorescence emission upon staining S-180 cells with Rhodamine 123 (Rh 123), enhanced expression of cytosolic Cyt c and mitochondrial Bax, and inhibition of apoptosis in the presence of caspase-9 inhibitor in PJE-treated cells indicated intrinsic pathway of apoptosis. Liver function test and hepatic antioxidant enzymes demonstrated non-toxicity of PJE. Finally, the detection of PJE in sera by HPLC confirmed its bioavailability.
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Affiliation(s)
- Kartick Patra
- a Department of Zoology , West Bengal State University , Kolkata , India
| | - Samarjit Jana
- a Department of Zoology , West Bengal State University , Kolkata , India
| | - Arnab Sarkar
- a Department of Zoology , West Bengal State University , Kolkata , India
| | - Subrata Karmakar
- a Department of Zoology , West Bengal State University , Kolkata , India
| | - Jagannath Jana
- b Department of Biophysics , Bose Institute , Kolkata , India
| | - Mradu Gupta
- c Department of Dravyaguna (Medicinal Plant Pharmacology) , Institute of Post Graduate Ayurvedic Education & Research , Kolkata , India
| | | | - Utpal Chandra De
- e Department of Chemistry , Tripura University , Suryamaninagar, Agartala , India
| | - Deba Prasad Mandal
- a Department of Zoology , West Bengal State University , Kolkata , India
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De UC, Debnath S, Ghosh R, Debnath S. Preliminary screening for in vitro anti-enteritic properties of a traditional herb Dillenia pentagyna Roxb. fruit extracts. ASIAN PAC J TROP MED 2014; 7S1:S332-41. [DOI: 10.1016/s1995-7645(14)60255-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 06/03/2014] [Accepted: 06/24/2014] [Indexed: 10/24/2022] Open
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De UC, Mishra P, Pal PR, Dinda B, Basak A. Non-peptide Inhibitors of Proprotein Convertase Subtilisin Kexins (PCSKs): An Overall Review of Existing and New Data. ACTA ACUST UNITED AC 2012. [DOI: 10.4199/c00066ed1v01y201209pac003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Abstract
A new iridoid, shanzhiol (1), was isolated from the aerial parts of Mussaenda roxburghii. The structure was established by spectroscopic (including 2D NMR) and chemical methods. Shanzhiol (1) showed mild antibacterial activity against both Staphylococcus aureus and Escherichia coli with a MIC of 100 μg/mL by the broth dilution method.
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Affiliation(s)
- Utpal Chandra De
- Department of Chemistry, Tripura University, Suryamaninagar-799 022, Agartala, Tripura, India
| | - Ranjit Ghosh
- Sarat Chandra H.S. School, Khowai – 799 201, Tripura, India
| | - Sanjib Chowdhury
- Department of Chemistry, R.K. Mahavidyalaya, Kailasahar - 799277, Tripura, India
| | - Biswanath Dinda
- Department of Chemistry, Tripura University, Suryamaninagar-799 022, Agartala, Tripura, India
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Dinda B, Bhattacharya A, De UC, Arima S, Takayanagi H, Harigaya Y. Antimicrobial C-glucoside from aerial parts of Diospyros nigra. Chem Pharm Bull (Tokyo) 2006; 54:679-81. [PMID: 16651765 DOI: 10.1248/cpb.54.679] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A new C-alkylglucoside, diospyrodin [beta-1C-(1'S*,2'R*,3'R*,4'S*-1',2',3',4',5'-pentahydroxypentyl)-glucopyranoside] (1) has been isolated as its nonaacetate from the leaves and stems of Diospyros nigra. Its structure was elucidated on the basis of chemical and spectral properties and a single crystal X-ray analysis. It showed antimicrobial activity against Gram-positive and Gram-negative bacteria.
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Affiliation(s)
- Biswanath Dinda
- Department of Chemistry, Tripura University, Suryamaninagar, Agartala-799 130, India.
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