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Zheng J, Jiang H, Yan Y, Yin T. Overview of the chemistry and biological activities of natural atisine-type diterpenoid alkaloids. RSC Adv 2024; 14:22882-22893. [PMID: 39040692 PMCID: PMC11261430 DOI: 10.1039/d4ra03305a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2024] [Accepted: 07/15/2024] [Indexed: 07/24/2024] Open
Abstract
Atisine-type C20-diterpenoid alkaloids (DAs) are a very important class of diterpenoid alkaloids, which play an important role in the biosynthesis of DAs. To date, 87 atisine-type DAs and 11 bis-DAs containing an atisine unit have been reported from five genera in two families. The genus Spiraea in Rosaceae family could be regarded as the richest resource for atisine-type DAs, followed by the genera Delphinium and Aconitum in the Ranunculaceae family. Among the reported atisine-type DAs, several possess unprecedented skeletons. Natural atisine-type DAs have a wide range of biological activities, including antitumor, antiplatelet aggregation, biological control, and anti-inflammatory, analgesic, antiarrhythmic, and cholinesterase inhibitory effects, which are closely related to their structures. In particular, the antiparasitic effect of atisine-type DAs is more prominent than that of other types of DAs, which highlights their potential in antiparasite drug discovery. In summary, the high chemical and biological diversity of atisine-type DAs indicates their great potential as a vast resource for drug discovery.
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Affiliation(s)
- Jiaqi Zheng
- School of Bioengineering, Zunyi Medical University 519041 Zhuhai China
| | - Hongjun Jiang
- School of Bioengineering, Zunyi Medical University 519041 Zhuhai China
| | - Yuanfeng Yan
- School of Bioengineering, Zunyi Medical University 519041 Zhuhai China
| | - Tianpeng Yin
- School of Bioengineering, Zunyi Medical University 519041 Zhuhai China
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Singh CP, Sharma A, Sharma K, Darshani P, Katare A, Kumar D, Bharitkar YP. Two new cycloartane type triterpenes from Dysoxyllum binectariferum. Nat Prod Res 2024; 38:2288-2295. [PMID: 36710465 DOI: 10.1080/14786419.2023.2172008] [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: 11/14/2022] [Revised: 01/03/2023] [Accepted: 01/14/2023] [Indexed: 01/31/2023]
Abstract
Dysoxyllum binectariferum is an important medicinal plant known for various biological activities like anti-inflammatory, CNS depressants, contraceptive, analgesic, immunomodulatory, antimalarial, antifeedant, leishmanicidal and antiviral. It is a rich source of rohitukine, a basic skeleton of flavopiridol. Phytochemical investigation of chloroform extracts of Dysoxyllum binectariferum leaves, lead to the isolation of beddomeilactone (1) and two new cycloartane type triterpenoids beddomeilactol (2) and binectarilactone-A (3) with modified A ring. Compounds were assessed for their in-vitro α-glucosidase inhibitory activity. Compound 1 was found to be most potent, showing IC50 of 17.99 ± 0.26 µg/ml which is comparable to the positive control acarbose.
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Affiliation(s)
- Chetan Paul Singh
- Natural Products & Medicinal Chemistry Division, CSIR-Indian Indian Institute of Integrative Medicine, Jammu, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Akshima Sharma
- Natural Products & Medicinal Chemistry Division, CSIR-Indian Indian Institute of Integrative Medicine, Jammu, India
| | - Kajal Sharma
- Natural Products & Medicinal Chemistry Division, CSIR-Indian Indian Institute of Integrative Medicine, Jammu, India
| | - Priya Darshani
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, Jadavpur, Kolkata
| | - Anil Katare
- Quality Management & Instrumentation Division, CSIR-Indian Indian Institute of Integrative Medicine, Jammu, India
| | - Deepak Kumar
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, Jadavpur, Kolkata
| | - Yogesh P Bharitkar
- Natural Products & Medicinal Chemistry Division, CSIR-Indian Indian Institute of Integrative Medicine, Jammu, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
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3
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Rani N, Singh R, Kumar P, Sharma P, Kaur R, Arora R, Singh TG. Alkaloids as Potential Anti-HIV Agents. Curr HIV Res 2023; 21:240-247. [PMID: 37291776 DOI: 10.2174/1570162x21666230608114130] [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: 10/11/2022] [Revised: 04/01/2023] [Accepted: 04/19/2023] [Indexed: 06/10/2023]
Abstract
BACKGROUND Alkaloids are nitrogen-containing compounds that are naturally occurring and have a variety of biological activities, including antimicrobial properties. In this study, the authors used a molecular docking approach to evaluate the anti-HIV potential of 64 alkaloids. METHODS The authors used the Molegro Virtual Docker software to dock the alkaloids into the active sites of three HIV enzymes: protease, integrase, and non-nucleoside reverse transcriptase (NNRT). The docking scores were used to assess the potential of the alkaloids to inhibit the enzymes. RESULTS The results showed the alkaloids to have good potential to inhibit the enzymes. Tubocurarine and reserpine were found to be the most potent alkaloids, with docking scores of -123.776 and - 114.956, respectively. CONCLUSION The authors concluded that tubocurarine and reserpine could be further promoted as potential lead molecules for the development of new anti-HIV drugs.
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Affiliation(s)
- Nidhi Rani
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Randhir Singh
- Department of Pharmacology, Central University, Bathinda, India
| | - Praveen Kumar
- SunPharma, Hill Top Area, Vill. Bhatolikalan, P.O.Barotiwala, Distt.Solan, Himachal Pardesh, 174103, India
| | - Prerna Sharma
- Guru Gobind Singh College of Pharmacy, Yamuna Nagar, India
| | - Rajwinder Kaur
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Rashmi Arora
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
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4
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Puranik NV, Mishra G, Gulawani S, Srivastava P. First synthetic report and antioxidant potential of natural product (±)-5,7-dihydroxy-8-methyl-3-(2',4'-dihydroxybenzyl)chroman-4-one from Chinese medicine Gan Luo Xin pill. Nat Prod Res 2022; 36:6259-6266. [PMID: 35045783 DOI: 10.1080/14786419.2022.2027936] [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: 12/31/2022]
Abstract
The first synthetic route of naturally occurring (±)-5,7-dihydroxy-8-methyl-3-(2',4'-dihydroxybenzyl)chroman-4-one (1) from Gan Luo Xin pill was successfully accomplished. The synthetic route has been developed retro-synthetically in 9 simple steps with a high yield of ∼80%. The synthetic protocol was developed using readily available starting material phloroglucinol. The key intermediate 2,4,6-trihydroxy-3-methyl acetophenone (4) was synthesized via Vilsmeier-Haack reaction, followed by reduction using sodium cyanoborohydride and acylation reaction. LC-MS, IR, 1H NMR, 13C NMR of 1 have been analyzed to confirm the structure of (±)-5,7-dihydroxy-8-methyl-3-(2',4'-dihydroxybenzyl)chroman-4-one (1) and found in agreement with the natural molecule. The target compound showed 97% and 87% antioxidant activity in DPPH and ABTS assay at 1 mg/ml concentration, respectively. The compound (1) also showed ferric ion reducing activity with the absorbance of 0.18 at 700 nm. The present study could be useful in developing synthetic routes of other potential naturally occurring homoisoflavonoid.
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Affiliation(s)
- Ninad V Puranik
- Bioprospecting Group, MACS, Agharkar Research Institute, Pune, Maharashtra, India.,Savitribai Phule Pune University, Pune, Maharashtra, India
| | - Garima Mishra
- Bioprospecting Group, MACS, Agharkar Research Institute, Pune, Maharashtra, India
| | - Swapnaja Gulawani
- Bioprospecting Group, MACS, Agharkar Research Institute, Pune, Maharashtra, India.,Savitribai Phule Pune University, Pune, Maharashtra, India
| | - Pratibha Srivastava
- Bioprospecting Group, MACS, Agharkar Research Institute, Pune, Maharashtra, India.,Savitribai Phule Pune University, Pune, Maharashtra, India
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5
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Gul N, Ahmad S, Ahmad H, Aziz A, Almehmadi M, Amer Alsaiari A, Allahyani M, Zainab, Adnan Ali Shah S, Ur Rahman N, Ahmad M. New acetylcholinesterase inhibitors isolated from Delphinium uncinatum. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Hanif M, Kosar N, Mahmood T, Muhammad M, Ullah F, Tahir MN, Ribeiro AI, Khan E. Schiff Bases Derived from 2‐Amino‐6‐methylbenzothiazole, 2‐Amino‐5‐chloropyridine and 4‐Chlorobenzaldehyde: Structure, Computational Studies and Evaluation of Biological Activity. ChemistrySelect 2022. [DOI: 10.1002/slct.202203386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Muhammad Hanif
- Department of Chemistry University of Malakand 18800 Chakdara Lower Dir Khyber Pakhtunkhwa Pakistan
| | - Naveen Kosar
- Department of Chemistry University of Management and Technology (UMT) C11, Johar Town Lahore Pakistan
| | - Tariq Mahmood
- Department of Chemistry College of Science University of Bahrain Main campus 32038 Sakhir, Kingdom of Bahrain
- Department of Chemistry COMSATS University Islamabad Abbottabad Campus, Abbottabad 22060 Pakistan
| | - Mian Muhammad
- Department of Chemistry University of Malakand 18800 Chakdara Lower Dir Khyber Pakhtunkhwa Pakistan
| | - Farhat Ullah
- Department of Pharmacy University of Malakand 18800 Chakdara Lower Dir Khyber Pakhtunkhwa Pakistan
| | | | - Alany Ingrid Ribeiro
- Laboratorio de Produtos Naturais Departmento de Quimica universidade Federal de sao Carlos, UFSCar Brazil
| | - Ezzat Khan
- Department of Chemistry University of Malakand 18800 Chakdara Lower Dir Khyber Pakhtunkhwa Pakistan
- Department of Chemistry College of Science University of Bahrain Main campus 32038 Sakhir, Kingdom of Bahrain
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7
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Ahmad S, Gul N, Ahmad M, Almehmadi M, Shafie A, Shah SAA, Rahman NU, Ahmad H. Isolation, crystal structure, DFT calculation and molecular docking of uncinatine-A isolated from Delphinium uncinatum. Fitoterapia 2022; 162:105268. [PMID: 35963483 DOI: 10.1016/j.fitote.2022.105268] [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: 05/12/2022] [Revised: 08/06/2022] [Accepted: 08/07/2022] [Indexed: 11/26/2022]
Abstract
The main objective of our present research work was to explore molecular insight for potentially active new acetylcholinesterase inhibitor from the aerial parts of Delphinium uncinatum. New norditerpenoid alkaloids, uncinatine-A, was isolated from the basic alkaloidal fraction of D. uncinatum, based on bioactivity guided isolation. The structure of uncinatine-A was determined through latest spectroscopic techniques including single X-Ray diffraction technique. The structural data and electronic properties of uncinatine-A was also calculated by Density Functional Theory (DFT) using B3LYP/6-31þ G (p) basis set. The isolated natural product was evaluated for their acetyl cholinesterase inhibitory potential in dose dependent protocol (62.5-1000 μg/mL), followed by molecular docking studies. Significant competitive type inhibition activity (IC50 = 207.73 ± 0.3) was shown by isolated natural norditerpenoid against cholinesterase targets in comparison with standard drugs available in the market such as galanthamine. The molecular docking results showed that isolated natural product was well accommodated by AChE in the active site with docking scores -11.0326. This is the first report indicating uncinatine-A as a potent acetylcholinesterase inhibitor and can be used as a target drug in cerebral dementia and Alzheimer diseases.
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Affiliation(s)
- Shujaat Ahmad
- Department of Pharmacy, Shaheed Benazir Bhutto University, Sheringal, Dir (U) 18000, KP, Pakistan
| | - Nadia Gul
- Department of Chemistry, University of Malakand, Chakdara, Dir (L) 18550, KP, Pakistan
| | - Manzoor Ahmad
- Department of Chemistry, University of Malakand, Chakdara, Dir (L) 18550, KP, Pakistan.
| | - Mazen Almehmadi
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, P.O Box 11099, Taif 21944, Saudi Arabia
| | - Alaa Shafie
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, P.O Box 11099, Taif 21944, Saudi Arabia
| | - Syed Adnan Ali Shah
- Faculty of Pharmacy, Universiti Teknologi MARA Cawangan Selangor Kampus Puncak Alam, Bandar Puncak Alam 42300, Selangor, Malaysia; Atta-Ur-Rahman Institute for Natural Products Discovery (AuRIns), Universiti Teknologi MARA Cawangan Selangor Kampus Puncak Alam, Bandar Puncak Alam 42300, Selangor, Malaysia
| | - Najeeb Ur Rahman
- Department of Chemistry, University of Malakand, Chakdara, Dir (L) 18550, KP, Pakistan
| | - Hanif Ahmad
- Department of Chemistry, University of Malakand, Chakdara, Dir (L) 18550, KP, Pakistan.
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8
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In Vitro and In Silico Investigation of Diterpenoid Alkaloids Isolated from Delphinium chitralense. Molecules 2022; 27:molecules27144348. [PMID: 35889221 PMCID: PMC9325274 DOI: 10.3390/molecules27144348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Revised: 07/02/2022] [Accepted: 07/05/2022] [Indexed: 11/17/2022] Open
Abstract
This study reports the isolation of three new C20 diterpenoid alkaloids, Chitralinine A–C (1–3) from the aerial parts of Delphinium chitralense. Their structures were established on the basis of latest spectral techniques and single crystal X-rays crystallographic studies of chitralinine A described basic skeleton of these compounds. All the isolated Compounds (1–3) showed strong, competitive type inhibition against acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) in comparison to standard allanzanthane and galanthamine however, chitralinine-C remained the most potent with IC50 value of 11.64 ± 0.08 μM against AChE, and 24.31 ± 0.33 μM against BChE, respectively. The molecular docking reflected a binding free energy of −16.400 K Cal-mol−1 for chitralinine-C, having strong interactions with active site residues, TYR334, ASP72, SER122, and SER200. The overall findings suggest that these new diterpenoid alkaloids could serve as lead drugs against dementia-related diseases including Alzheimer’s disease.
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9
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Ahmad S, Zainab, Ahmad H, Khan I, Alghamdi S, Almehmadi M, Ali M, Ullah A, Hussain H, Khan NM, Ali F, Ahmad M. Green synthesis of gold nanaoparticles using Delphinium Chitralense tuber extracts, their characterization and enzyme inhibitory potential. BRAZ J BIOL 2022; 82:e257622. [PMID: 35293518 DOI: 10.1590/1519-6984.257622] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Accepted: 01/31/2022] [Indexed: 11/21/2022] Open
Abstract
Green synthesis has been introduced as an alternative to chemical synthesis due to the serious consequences. Metal nanoparticles synthesized through green approach have different pharmaceutical, medical and agricultural applications. The present study followed a green and simple route for the preparation of potentially bioactive gold nanoparticles (Au NPs). Au NPs were prepared via green synthesis approach using crude basic alkaloidal portion of the tuber of Delphinium chitralense. The green synthesized Au NPs were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD) fourier transform infrared (FTIR), and UV-Visible spectrophotometer. Morphological analysis shows that Au NPs have cubic geometry with different sizes. UV-Vis spectroscopic analysis confirmed the synthesis of Au NPs while XRD proved their pure crystalline phase. The Au NPs showed promising dose dependent inhibition of both AChE and BChE as compared to the crude as well as standard drug.
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Affiliation(s)
- S Ahmad
- University of Malakand, Department of Chemistry, Chakdara, Dir (L), Khyber Pakhtunkhwa, Pakistan.,Shaheed Benazir Bhutto University Sheringal, Department of Pharmacy, Dir (Upper), Khyber Pakhtunkhwa, Pakistan
| | - Zainab
- University of Malakand, Department of Chemistry, Chakdara, Dir (L), Khyber Pakhtunkhwa, Pakistan
| | - H Ahmad
- University of Malakand, Department of Chemistry, Chakdara, Dir (L), Khyber Pakhtunkhwa, Pakistan
| | - I Khan
- Bacha Khan University Charsadda, Department of Chemistry, Khyber Pakhtunkhwa, Pakistan
| | - S Alghamdi
- Umm Al-Qura University, Faculty of Applied Medical Sciences, Laboratory Medicine Department, Makkah, Saudi Arabia
| | - M Almehmadi
- Taif University, College of Applied Medical Sciences, Department of Clinical Laboratory Sciences, Taif, Saudi Arabia
| | - M Ali
- University of Malakand, Department of Chemistry, Chakdara, Dir (L), Khyber Pakhtunkhwa, Pakistan
| | - A Ullah
- Shaheed Benazir Bhutto University Sheringal, Department of Pharmacy, Dir (Upper), Khyber Pakhtunkhwa, Pakistan
| | - H Hussain
- Shaheed Benazir Bhutto University Sheringal, Department of Pharmacy, Dir (Upper), Khyber Pakhtunkhwa, Pakistan
| | - N M Khan
- Shaheed Benazir Bhutto University Sheringal, Department of Agriculture, Dir (Upper), Khyber Pakhtunkhwa, Pakistan
| | - F Ali
- Shaheed Benazir Bhutto University Sheringal, Department of Chemistry, Dir (Upper), Khyber Pakhtunkhwa, Pakistan
| | - M Ahmad
- University of Malakand, Department of Chemistry, Chakdara, Dir (L), Khyber Pakhtunkhwa, Pakistan
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10
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Thiourea Derivatives, Simple in Structure but Efficient Enzyme Inhibitors and Mercury Sensors. Molecules 2021; 26:molecules26154506. [PMID: 34361659 PMCID: PMC8347686 DOI: 10.3390/molecules26154506] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 07/04/2021] [Accepted: 07/11/2021] [Indexed: 11/16/2022] Open
Abstract
In this study six unsymmetrical thiourea derivatives, 1-isobutyl-3-cyclohexylthiourea (1), 1-tert-butyl-3-cyclohexylthiourea (2), 1-(3-chlorophenyl)-3-cyclohexylthiourea (3), 1-(1,1-dibutyl)-3-phenylthiourea (4), 1-(2-chlorophenyl)-3-phenylthiourea (5) and 1-(4-chlorophenyl)-3-phenylthiourea (6) were obtained in the laboratory under aerobic conditions. Compounds 3 and 4 are crystalline and their structure was determined for their single crystal. Compounds 3 is monoclinic system with space group P21/n while compound 4 is trigonal, space group R3:H. Compounds (1–6) were tested for their anti-cholinesterase activity against acetylcholinesterase and butyrylcholinesterase (hereafter abbreviated as, AChE and BChE, respectively). Potentials (all compounds) as sensing probes for determination of deadly toxic metal (mercury) using spectrofluorimetric technique were also investigated. Compound 3 exhibited better enzyme inhibition IC50 values of 50, and 60 µg/mL against AChE and BChE with docking score of −10.01, and −8.04 kJ/mol, respectively. The compound also showed moderate sensitivity during fluorescence studies.
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11
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Puranik NV, Swami S, Misar AV, Mamgain R, Gulawani SS, Dhiman, Sarkar, Srivastava P. The first synthesis of podocarflavone A and its analogs and evaluation of their antimycobacterial potential against Mycobacterium tuberculosis with the support of virtual screening. Nat Prod Res 2021; 36:3879-3886. [PMID: 33663286 DOI: 10.1080/14786419.2021.1893317] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The first synthetic route developed for Podocarflavone A reported from Podocarpus macrophyllus and its analogs in 7 steps. Computational analysis for binding with the pantothenate kinase (3AVO) of Mycobacterium tuberculosis showed their docking score (ds) in the range of -8.9 to -9.3 Kcal/mol. MD simulations delineated the stability of the protein-ligand complexes in the TIP3P model. MMGBSA and MMPBSA values of 8d were -42.46 Kcal/mol and -14.58 Kcal/mol, respectively. Further in-vitro antitubercular screening of compounds 8a, 8d, and 8e against M. tuberculosis H37Ra using XRMA protocol exhibited promising antimycobacterial activity with IC50 values 21.82 µg/mL, 15.55 µg/mL, and 16.56 µg/mL, respectively. Compounds 8a, 8d, and 8e showed antibacterial activity with IC50 values 41.56 µg/mL, 24.72 µg/mL, and 72.45 µg/mL respectively against the Staphylococcus aureus. 8a and 8d showed inhibition with IC50 values 39.6 µg/mL and 27.64 µg/mL, respectively, against Bacillus subtilis. The present study could help in the further development of lead molecules against tuberculosis.
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Affiliation(s)
- Ninad V Puranik
- Bioprospecting Group, Agharkar Research Institute, Pune, Maharashtra, India.,Savitribai Phule Pune University, Pune, Maharashtra, India
| | - Sagar Swami
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India.,Combi-Chem Bio-Resource Center, Organic Chemistry Division, CSIR-National Chemical Laboratory, Pune, Maharashtra, India
| | - Ashwini V Misar
- Bioprospecting Group, Agharkar Research Institute, Pune, Maharashtra, India
| | - Ritu Mamgain
- Bioprospecting Group, Agharkar Research Institute, Pune, Maharashtra, India
| | | | | | - Sarkar
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India.,Combi-Chem Bio-Resource Center, Organic Chemistry Division, CSIR-National Chemical Laboratory, Pune, Maharashtra, India
| | - Pratibha Srivastava
- Bioprospecting Group, Agharkar Research Institute, Pune, Maharashtra, India.,Savitribai Phule Pune University, Pune, Maharashtra, India
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12
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Cassiano DSA, Reis IMA, Estrela IDO, de Freitas HF, Pita SSDR, David JM, Branco A. Acetylcholinesterase inhibitory activities and bioguided fractionation of the Ocotea percoriacea extracts: HPLC-DAD-MS/MS characterization and molecular modeling of their alkaloids in the active fraction. Comput Biol Chem 2019; 83:107129. [PMID: 31606587 DOI: 10.1016/j.compbiolchem.2019.107129] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 08/21/2019] [Accepted: 09/16/2019] [Indexed: 10/25/2022]
Abstract
In vitro acetylcholinesterase activities of the hexane, dichloromethane, ethyl acetate, n-butanol and aqueous extracts of leaves of Ocotea percoriacea Kosterm. (Lauraceae) were evaluated. The bioguided fractionation of the most active extract (dichloromethane) using silica gel open-column chromatography led to an active alkaloidal fraction composed of isocorydine N-oxide, isocorydine N-oxide derivative, palmatine, roemerine and roemerine N-Oxide. The identification of the chemical structure of these compounds was carried out with high-performance liquid chromatography coupled to electrospray ionization multiple-stage mass spectrometry (HPLC-ESI-MS/MS). Aiming to understand their inhibitory activities, these alkaloids were docked into a 3D model of Electrophorus electricus Acetylcholinesterase (EelAChE) built in the Modeller 9.18 employing homology modeling approach. The results suggest that the alkaloids had the same binding mode and, possibly, the inhibition mechanism of classic drugs (ex. tacrine and donepezil). The structural difference of these compounds opens a new opportunity for the optimization of leading compounds.
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Affiliation(s)
- Dayse Santos Almeida Cassiano
- Laboratory of Phytochemistry, Health Department, State University of Feira de Santana (UEFS), Feira de Santana, Bahia, Brazil
| | - Isabella Mary Alves Reis
- Laboratory of Phytochemistry, Health Department, State University of Feira de Santana (UEFS), Feira de Santana, Bahia, Brazil
| | - Isabela de Oliveira Estrela
- Laboratory of Bioinformatics and Molecular Modeling (LaBiMM), Pharmacy College, Federal University of Bahia (UFBA), Salvador, Bahia, Brazil
| | - Humberto Fonseca de Freitas
- Laboratory of Bioinformatics and Molecular Modeling (LaBiMM), Pharmacy College, Federal University of Bahia (UFBA), Salvador, Bahia, Brazil
| | - Samuel Silva da Rocha Pita
- Laboratory of Bioinformatics and Molecular Modeling (LaBiMM), Pharmacy College, Federal University of Bahia (UFBA), Salvador, Bahia, Brazil
| | - Jorge Mauricio David
- Chemistry Institute, Federal University of Bahia (UFBA), Salvador, Bahia, Brazil
| | - Alexsandro Branco
- Laboratory of Phytochemistry, Health Department, State University of Feira de Santana (UEFS), Feira de Santana, Bahia, Brazil.
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Ahmad H, Ahmad S, Ali M, Latif A, Shah SAA, Naz H, Ur Rahman N, Shaheen F, Wadood A, Khan HU, Ahmad M. Norditerpenoid alkaloids of Delphinium denudatum as cholinesterase inhibitors. Bioorg Chem 2018; 78:427-435. [PMID: 29698893 DOI: 10.1016/j.bioorg.2018.04.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 04/04/2018] [Accepted: 04/13/2018] [Indexed: 10/17/2022]
Abstract
Three new norditerpenoids alkaloids, 1β-hydroxy,14β-acetyl condelphine (1), jadwarine-A (2), jadwarine-B (3) along with two known alkaloids isotalatizidine hydrate (4) and dihydropentagynine (5) were isolated from medicinal plant Delphinium denudatum. The structures of natural products 1-5 were established on the basis of HR-EIMS, 1H and 13C NMR (1D & 2D) spectroscopic data as well as by comparison from literature data. The structures of compound 1 and 4 were also confirmed by single crystal X-ray diffraction studies. In-vitro AChE and BChE enzyme inhibitory activities of compounds 1-5 and molecular docking studies were performed to investigate the possible molecular inhibitory mechanism of the isolated natural products. Compound 2, 4 and 5 showed competitive inhibitory effects by inhibiting AChE and BChE, respectively, while 1 and 3 showed non-competitive inhibition. This work is the first report that provides a supporting evidence about the use of constituents of Delphinium denudatum in cerebral dementia and Alzheimer diseases.
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Affiliation(s)
- Hanif Ahmad
- Department of Chemistry, University of Malakand, Chakdara, Dir (L) 18550, KP, Pakistan
| | - Shujaat Ahmad
- Department of Chemistry, University of Malakand, Chakdara, Dir (L) 18550, KP, Pakistan; Department of Pharmacy, Shaheed Benazir Bhutto University, Sheringal Dir (U), 18000 KP, Pakistan
| | - Mumtaz Ali
- Department of Chemistry, University of Malakand, Chakdara, Dir (L) 18550, KP, Pakistan
| | - Abdul Latif
- Department of Chemistry, University of Malakand, Chakdara, Dir (L) 18550, KP, Pakistan
| | - Syed Adnan Ali Shah
- Faculty of Pharmacy, Universiti Teknologi MARA Puncak Alam Campus, 42300 Bandar Puncak Alam, Selangor D.E., Malaysia; Atta-ur-Rahman Institute for Natural Products Discovery (AuRIns), Universiti Teknologi MARA Puncak Alam Campus, 42300 Bandar Puncak Alam, Selangor D.E., Malaysia
| | - Humera Naz
- Faculty of Pharmacy, Universiti Teknologi MARA Puncak Alam Campus, 42300 Bandar Puncak Alam, Selangor D.E., Malaysia; Atta-ur-Rahman Institute for Natural Products Discovery (AuRIns), Universiti Teknologi MARA Puncak Alam Campus, 42300 Bandar Puncak Alam, Selangor D.E., Malaysia
| | - Najeeb Ur Rahman
- Department of Chemistry, University of Malakand, Chakdara, Dir (L) 18550, KP, Pakistan
| | - Farzana Shaheen
- HEJ Research Institute of Chemistry, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Pakistan
| | - Abdul Wadood
- Department of Biochemistry, Abdul Wali Khan University Mardan, Khyber Pakhtunkhwa, Pakistan
| | - Hidayat Ullah Khan
- Department of Biotechnology, University of Science and Technology, Bannu, Khyber Pakhtunkhwa, Pakistan
| | - Manzoor Ahmad
- Department of Chemistry, University of Malakand, Chakdara, Dir (L) 18550, KP, Pakistan.
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14
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Bhattacharyya PK. Exploring Cation−π Interaction in the Complexes with B≡B Triple Bond: A DFT Study. J Phys Chem A 2017; 121:3287-3298. [DOI: 10.1021/acs.jpca.7b01326] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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