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Yusuf TL, Oladipo SD, Olagboye SA, Zamisa SJ, Tolufashe GF. Solvent-free synthesis of nitrobenzyl Schiff bases: Characterization, antibacterial studies, density functional theory and molecular docking studies. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128857] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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2
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Olagboye SA, Yusuf TL, Oladipo SD, Zamisa SJ. Crystal structure of ( E)-1-(2-nitrophenyl)- N-( o-tolyl)methanimine, C 14H 12N 2O 2. Z KRIST-NEW CRYST ST 2020. [DOI: 10.1515/ncrs-2020-0034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
C14H12N2O2, monoclinic, P21, a = 8.3844(1) Å, b = 20.0465(3) Å, c = 14.0511(2) Å, β = 94.786(1)°, V = 2353.44(6) Å3, Z = 4, R
gt(F) = 0.0356, wR
ref(F
2) = 0.1022, T = 150(2) K.
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Affiliation(s)
- Sulaiman A. Olagboye
- Ekiti State University , Department of Chemistry , PMB 5363, Ado-Ekiti , Nigeria
| | - Tunde L. Yusuf
- University of KwaZulu-Natal, School of Chemistry and Physics , Private Bag X54001, Westville Campus , Durban 4000 , South Africa
| | - Segun D. Oladipo
- University of KwaZulu-Natal, School of Chemistry and Physics , Private Bag X54001, Westville Campus , Durban 4000 , South Africa
| | - Sizwe J. Zamisa
- University of KwaZulu-Natal, School of Chemistry and Physics , Private Bag X54001, Westville Campus , Durban 4000 , South Africa
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Jain P, Kumar D, Chandra S, Misra N. Experimental and theoretical studies of Mn(II) and Co(II) metal complexes of a tridentate Schiff's base ligand and their biological activities. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5371] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Pallavi Jain
- Department of ChemistrySRM‐IST Delhi NCR Campus Ghaziabad 201204 India
| | - Dinesh Kumar
- School of Chemical SciencesCentral University of Gujarat Gandhinagar 382030 India
| | - Sulekh Chandra
- Department of ChemistryZakir Husain Delhi College JLN Marg New Delhi 110002 India
| | - Namita Misra
- Residential Complex IIT Jodhpur Jodhpur 342037 India
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Lasing T, Phumee A, Siriyasatien P, Chitchak K, Vanalabhpatana P, Mak KK, Hee Ng C, Vilaivan T, Khotavivattana T. Synthesis and antileishmanial activity of fluorinated rhodacyanine analogues: The 'fluorine-walk' analysis. Bioorg Med Chem 2019; 28:115187. [PMID: 31761725 DOI: 10.1016/j.bmc.2019.115187] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Revised: 10/16/2019] [Accepted: 10/25/2019] [Indexed: 02/05/2023]
Abstract
In a search for potent antileishmanial drug candidates, eighteen rhodacyanine analogues bearing fluorine or perfluoroalkyl substituents at various positions were synthesized. These compounds were tested for their inhibitory activities against Leishmania martiniquensis and L. orientalis. This 'fluorine-walk' analysis revealed that the introduction of fluorine atom at C-5, 6, 5', or 6' on the benzothiazole units led to significant enhancement of the activity, correlating with the less negative reduction potentials of the fluorinated analogues confirmed by the electrochemical study. On the other hand, CF3 and OCF3 groups were found to have detrimental effects, which agreed with the poor aqueous solubility predicted by the in silico ADMET analysis. In addition, some of the analogues including the difluorinated species showed exceptional potency against the promastigote and axenic amastigote stages (IC50 = 40-85 nM), with the activities surpassing both amphotericin B and miltefosine.
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Affiliation(s)
- Thitiya Lasing
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Atchara Phumee
- Thai Red Cross Emerging Infectious Diseases-Health Science Centre, World Health Organization Collaborating Centre for Research and Training on Viral Zoonoses, Chulalongkorn Hospital, Bangkok 10330, Thailand; Vector Biology and Vector Borne Disease Research Unit, Department of Parasitology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
| | - Padet Siriyasatien
- Vector Biology and Vector Borne Disease Research Unit, Department of Parasitology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
| | - Kantima Chitchak
- Program of Petrochemistry and Polymer Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Parichatr Vanalabhpatana
- Electrochemistry and Optical Spectroscopy Center of Excellence, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Kit-Kay Mak
- Department of Pharmaceutical Chemistry, School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia
| | - Chew Hee Ng
- Department of Pharmaceutical Chemistry, School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia
| | - Tirayut Vilaivan
- Organic Synthesis Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Tanatorn Khotavivattana
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; Research Unit for Metabolic Bone Disease in CKD Patients, Chulalongkorn University, Bangkok 10330, Thailand.
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5
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Kaur R, Kaur S. Evaluation of in vitro and in vivo antileishmanial potential of bergenin rich Bergenia ligulata (Wall.) Engl. root extract against visceral leishmaniasis in inbred BALB/c mice through immunomodulation. J Tradit Complement Med 2018; 8:251-260. [PMID: 29322016 PMCID: PMC5756018 DOI: 10.1016/j.jtcme.2017.06.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 06/19/2017] [Accepted: 06/20/2017] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Medicinal plants with immunomodulatory properties can provide good alternative therapeutics for curing visceral leishmaniasis. Bergenia ligulata (Wall.) Engl. is an interesting plant with strong antioxidant, antimicrobial, immunomodulatory and hepatoprotective properties. AIM The present study was planned to determine the antileishmanial activity of plant extract by modulating the immune responses of inbred BALB/c mice. METHODOLOGY Bergenin, the principle active component of B. ligulata, was quantitated in crude extract by performing RP-HPLC. The therapeutic potential was assessed through in vitro antileishmanial activity and in mice model through parasite load, cytokine assays, IgG antibody levels, DTH responses, histopathology and biochemical enzyme assays. RESULTS B. ligulata showed the presence of glycosides, saponins, carbohydrates, tannins, flavonoids and bergenin which contributed to the antileishmanial activity of extract with IC50 of 22.70 μg/mL. Furthermore, the higher dose significantly reduced the parasite load by 95.56 %. The reduction was further associated with significant enhancement of IL-12 and IFN-γ levels in comparison to IL-10 and IL-4 cytokines. The switching towards Th1 type of immune response was also confirmed by elevated antibody levels of IgG2a isotype as compared to IgG1 as well as increased DTH responses. The histology of liver and kidney further complimented the non toxic nature of plant extract in addition to its negligible toxicity on HeLa cells. CONCLUSIONS The current study revealed the significant antileishmanial and immunomodulatory properties of this plant extract against murine visceral leishmaniasis. Further, the bioactive components will be explored to assess their efficacy for the development of safe and cost effective drug.
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Key Words
- BLEE, Bergenia ligulata ethanolic extract
- Biochemical
- CMI, Cell mediated immune responses
- DCT, Distal convoluted tubules
- DMSO, Dimethyl sulphoxide
- Extract
- HPLC
- Histopathological studies
- Immunological
- PCT, Proximal convoluted tubules
- Parasite load
- SRBC, Sheep red blood cells
- SSG, Sodium stibogluconate
- T.S, Transverse section
- VL, Visceral leishmaniasis
- p.i.d., Post infection days
- p.t.d., Post treatment days
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Affiliation(s)
| | - Sukhbir Kaur
- Parasitology Laboratory, Department of Zoology, Panjab University, Chandigarh-160014, India
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6
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Tamayo LV, Santos AF, Ferreira IP, Santos VG, Lopes MTP, Beraldo H. Silver(I) complexes with chromone-derived hydrazones: investigation on the antimicrobial and cytotoxic effects. Biometals 2017; 30:379-392. [PMID: 28409296 DOI: 10.1007/s10534-017-0013-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 03/24/2017] [Indexed: 11/29/2022]
Abstract
Complexes [Ag(HCrPh)2]NO3·2H2O (1) and [Ag(HCrpClPh)2]NO3 (2) were obtained with 3-formyl-6-methylchromone-phenyl hydrazone (HCrPh, HL1) and 3-formyl-6-methylchromone-para-chloro-phenyl hydrazone (HCrpClPh, HL2). Although the hydrazones were inactive, upon coordination to silver(I) antifungal activity significantly improved against several Candida strains. Complexes (1-2) revealed to be more active than silver nitrate, silver sulfadiazine and the reference drug nystatin against Candida parapsilosis. The cytotoxic activities of the hydrazones and their silver(I) complexes were evaluated in comparison with cisplatin on B16F10 (metastatic melanoma) and Melan-a (non-tumorigenic melanocyte) cells. The hydrazones showed low cytotoxicity against B16F10 cells, reducing only about 20% of cell viability at the concentration of 10 μM. Upon coordination to silver(I) the cytotoxic effect did not appreciably change in complex (1) while complex (2) proved to be as cytotoxic as cisplatin and much more cytotoxic than both the free ligand and silver nitrate at 1 μM. Both complexes (1) and (2) were less active than cisplatin on non-malignant Melan-a cells, indicating that these compounds might promote less damage on normal cells.
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Affiliation(s)
- Lenka V Tamayo
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Ane F Santos
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Isabella P Ferreira
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Verlane G Santos
- Departamento de Farmacologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Miriam T P Lopes
- Departamento de Farmacologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Heloisa Beraldo
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil.
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Rodríguez-Hernández D, Barbosa LCA, Demuner AJ, de Almeida RM, Fujiwara RT, Ferreira SR. Highly potent anti-leishmanial derivatives of hederagenin, a triperpenoid from Sapindus saponaria L. Eur J Med Chem 2016; 124:153-159. [PMID: 27569196 DOI: 10.1016/j.ejmech.2016.08.030] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 08/01/2016] [Accepted: 08/14/2016] [Indexed: 12/15/2022]
Abstract
Leishmaniasis is a neglected tropical disease (NTDs), endemic in 88 countries that affect more than 12 million people. Current drugs are limited due to their toxicity, development of biological resistance, length of treatment and high cost. Thus, the search for new effective and less toxic treatments is an urgent need. In this study, we report the synthesis of 3 new amide derivatives of hederagenin (22-24) with yields between 70% and 90%, along with 57 other derivatives of hederagenin (1-21, 25-60) carrying different groups at C-28 previously reported by our group, and the results of their in vitro ability to inhibit the growth of Leishmania infantum. Some derivatives (3, 4, 44, 49 and 52), showed activity at micromolar level and low toxicity against BGM and HepG2 cells. Moreover, the ability of hederagenin derivatives 3 (IC50 = 9.7 μM), 4 (12 μM), 44 (11 μM) and 49 (2 μM), to prevent proliferation of intracellular amastigote forms of L. infantum and their higher selectivity index and low toxicity compared to commercial positive drug control of choice (potassium antimonyl tartrate trihydrate) (IC50 = 80 μM, SI = 0.1), make these compounds promising candidates for the treatment of leishmaniasis.
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Affiliation(s)
- Diego Rodríguez-Hernández
- Department of Chemistry, Universidade Federal de Minas Gerais, Av. Pres Antônio Carlos 6627, Campus Pampulha, CEP 31270-901, Belo Horizonte, MG, Brazil; Department of Chemistry, Universidade Federal de Viçosa, Av. P. H Rolf, s/n, CEP 36570-000, Viçosa, MG, Brazil
| | - Luiz C A Barbosa
- Department of Chemistry, Universidade Federal de Minas Gerais, Av. Pres Antônio Carlos 6627, Campus Pampulha, CEP 31270-901, Belo Horizonte, MG, Brazil; Department of Chemistry, Universidade Federal de Viçosa, Av. P. H Rolf, s/n, CEP 36570-000, Viçosa, MG, Brazil.
| | - Antonio J Demuner
- Department of Chemistry, Universidade Federal de Viçosa, Av. P. H Rolf, s/n, CEP 36570-000, Viçosa, MG, Brazil
| | - Raquel M de Almeida
- Department of Parasitology, Universidade Federal de Minas Gerais, Av. Pres Antônio Carlos 6627, Campus Pampulha, CEP 31270-901, Belo Horizonte, MG, Brazil
| | - Ricardo T Fujiwara
- Department of Parasitology, Universidade Federal de Minas Gerais, Av. Pres Antônio Carlos 6627, Campus Pampulha, CEP 31270-901, Belo Horizonte, MG, Brazil.
| | - Sebastião R Ferreira
- Department of Parasitology, Universidade Federal de Minas Gerais, Av. Pres Antônio Carlos 6627, Campus Pampulha, CEP 31270-901, Belo Horizonte, MG, Brazil
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