1
|
Dutra LL, Borges RJ, Maltarollo VG, Mendes TAO, Bressan GC, Leite JPV. In silico evaluation of pharmacokinetics properties of withanolides and simulation of their biological activities against Alzheimer's disease. J Biomol Struct Dyn 2024; 42:2616-2631. [PMID: 37166375 DOI: 10.1080/07391102.2023.2206909] [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: 08/26/2022] [Accepted: 04/19/2023] [Indexed: 05/12/2023]
Abstract
The withanolides are naturally occurring steroidal lactones found mainly in plants of the Solanaceae family. The subtribe Withaninae includes species like Withania sominifera, which are a source of many bioactive withanolides. In this work, we selected and evaluate the ADMET-related properties of 91 withanolides found in species of the subtribe Withaninae computationally, to predict the relationship between their structures and their pharmacokinetic profiles. We also evaluated the interaction of these withanolides with known targets of Alzheimer's disease (AD) through molecular docking and molecular dynamics. Withanolides presented favorable pharmacokinetic properties, like high gastrointestinal absorption, lipophilicity (logP ≤ 5), good distribution and excretion parameters, and a favorable toxicity profile. The specie Withania aristata stood out as an interesting source of the promising withanolides classified as 5-ene with 16-ene or 17-ene. These withanolides presented a favourable pharmacokinetic profile and were also highlighted as the best candidates for inhibition of AD-related targets. Our results also suggest that withanolides are likely to act as cholinesterase inhibitors by interacting with the catalytic pocket in an energy favorable and stable way.Communicated by Ramaswamy H. Sarma.
Collapse
Affiliation(s)
- Luana L Dutra
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Minas Gerais, Brazil
| | - Rafael J Borges
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Minas Gerais, Brazil
| | - Vinícius G Maltarollo
- Pharmaceutical Products Department- Faculty of Pharmacy, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
| | - Tiago A O Mendes
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Minas Gerais, Brazil
| | - Gustavo C Bressan
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Minas Gerais, Brazil
| | - João Paulo V Leite
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Minas Gerais, Brazil
| |
Collapse
|
2
|
Dantas Rocha KA, de Freitas Paulo T, Ayala AP, da Silva Sampaio V, Gomes Nunes PI, Santos FA, Canuto KM, Silveira ER, Loiola Pessoa OD. Anti-inflammatory withajardins from the leaves of Athenaea velutina. PHYTOCHEMISTRY 2022; 203:113338. [PMID: 35948140 DOI: 10.1016/j.phytochem.2022.113338] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 07/18/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
Withajardins, uncommon modified withanolide-type steroids, have been isolated exclusively from plants of the Solanaceae family so far. Two undescribed withajardins and the known tuboanosigenin were isolated from the hexane/EtOAc 1:1 extract from Athenaea velutina leaves. Their structures were established by an extensive analysis of 1D and 2D-NMR and HRMS data. The absolute configuration was determined by X-ray diffraction (withajardin L and tuboanosigenin) and circular dichroism (CD) analyses (withajardin M). The anti-inflammatory activity of compounds was evaluated through the inhibition of the lipopolysaccharide (LPS)-induced nitric oxide (NO), TNF-α, and IL-6 release in RAW264.7 cells. The cell viability effects to RAW 264.7 cells showed IC50 values of 74.4-354.4 μM. The compounds attenuated LPS-induced release of NO and decreased pro-inflammatory cytokines TNF-α and IL-6 in RAW264.7 cells.
Collapse
Affiliation(s)
- Késya Amanda Dantas Rocha
- Departamento de Química Orgânica e Inorgânica, Centro de Ciências, Universidade Federal do Ceará, 60021-970, Fortaleza, CE, Brazil
| | - Tércio de Freitas Paulo
- Departamento de Química Orgânica e Inorgânica, Centro de Ciências, Universidade Federal do Ceará, 60021-970, Fortaleza, CE, Brazil
| | - Alejandro Pedro Ayala
- Departamento de Física, Centro de Ciências, Universidade Federal do Ceará, 60440-900, Fortaleza, CE, Brazil
| | | | - Paulo Iury Gomes Nunes
- Departamento de Fisiologia e Farmacologia, Faculdade de Medicina, Universidade Federal do Ceará, 60430-270, Fortaleza, CE, Brazil
| | - Flávia Almeida Santos
- Departamento de Fisiologia e Farmacologia, Faculdade de Medicina, Universidade Federal do Ceará, 60430-270, Fortaleza, CE, Brazil
| | | | - Edilberto Rocha Silveira
- Departamento de Química Orgânica e Inorgânica, Centro de Ciências, Universidade Federal do Ceará, 60021-970, Fortaleza, CE, Brazil
| | - Otília Deusdenia Loiola Pessoa
- Departamento de Química Orgânica e Inorgânica, Centro de Ciências, Universidade Federal do Ceará, 60021-970, Fortaleza, CE, Brazil.
| |
Collapse
|
3
|
Almeida AA, Lima GDA, Eiterer M, Rodrigues LA, A do Vale JA, Zanatta AC, Bressan GC, de Oliveira LL, Leite JPV. A Withanolide-rich Fraction of Athenaea velutina Induces Apoptosis and Cell Cycle Arrest in Melanoma B16F10 Cells. PLANTA MEDICA 2022; 88:429-439. [PMID: 33853120 DOI: 10.1055/a-1395-9046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Athenaea velutina is a promising Brazilian shrub with cytotoxic and antimigratory properties against cancer cells. However, the mechanism of induction of cancer cell death and the compounds involved remain unknown. To ascertain these bioactive compounds, bioassay-guided fractionation was performed, alongside the appropriate in vitro tests. A withanolide-rich fraction (FAv_5) from the dichloromethane extract increased cytotoxic activity by 1.5-fold (IC50 = 2.1 µg/mL). Fourteen withanolide steroids were tentatively identified for the first time for this species by mass spectrometry coupled to liquid chromatography (LC MS/MS), including withanolide A, aurelianolide A, and aurelianolide B. FAv_5 significantly decreased cell proliferation, migration, and invasion with a selectivity index greater than 8 for B16F10 cells. Furthermore, flow cytometry with annexin V fluorescein isothiocyanate/propidium iodide (V-FITC/PI) staining showed FAv_5 to promote cell cycle arrest at the G0/G1-phase as well as apoptotic cell death. Overall, these findings highlight A. velutina as a source of withanolide-steroids that inhibit cancer cell proliferation through apoptosis and cell cycle blockade mechanisms. Details on the geographic distribution of A. velutina and species conservation strategies have also been highlighted.
Collapse
Affiliation(s)
- Alisson A Almeida
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Graziela D A Lima
- Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | | | - Laís A Rodrigues
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Juliana A A do Vale
- Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Ana C Zanatta
- Universidade Estadual Paulista (Unesp), Instituto de Química, Araraquara, São Paulo, Brazil
| | - Gustavo C Bressan
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Leandro L de Oliveira
- Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - João P V Leite
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Viçosa, Brazil
| |
Collapse
|
4
|
Abstract
Covering: March 2010 to December 2020. Previous review: Nat. Prod. Rep., 2011, 28, 705This review summarizes the latest progress and perspectives on the structural classification, biological activities and mechanisms, metabolism and pharmacokinetic investigations, biosynthesis, chemical synthesis and structural modifications, as well as future research directions of the promising natural withanolides. The literature from March 2010 to December 2020 is reviewed, and 287 references are cited.
Collapse
Affiliation(s)
- Gui-Yang Xia
- School of Chinese Materia Medica, State Key Laboratory of Component-Based Chinese Medicine, Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Jinghai District, Tianjin, 301617, China. .,Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China.
| | - Shi-Jie Cao
- School of Chinese Materia Medica, State Key Laboratory of Component-Based Chinese Medicine, Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Jinghai District, Tianjin, 301617, China.
| | - Li-Xia Chen
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China.
| | - Feng Qiu
- School of Chinese Materia Medica, State Key Laboratory of Component-Based Chinese Medicine, Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Jinghai District, Tianjin, 301617, China.
| |
Collapse
|
5
|
Peres RB, Fiuza LFDA, da Silva PB, Batista MM, Camillo FDC, Marques AM, de C. Brito L, Figueiredo MR, Soeiro MDNC. In Vitro Phenotypic Activity and In Silico Analysis of Natural Products from Brazilian Biodiversity on Trypanosoma cruzi. Molecules 2021; 26:molecules26185676. [PMID: 34577145 PMCID: PMC8472459 DOI: 10.3390/molecules26185676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/21/2021] [Accepted: 07/21/2021] [Indexed: 11/30/2022] Open
Abstract
Chagas disease (CD) affects more than 6 million people worldwide. The available treatment is far from ideal, creating a demand for new alternative therapies. Botanical diversity provides a wide range of novel potential therapeutic scaffolds. Presently, our aim was to evaluate the mammalian host toxicity and anti-Trypanosoma cruzi activity of botanic natural products including extracts, fractions and purified compounds obtained from Brazilian flora. In this study, 36 samples of extracts and fractions and eight pure compounds obtained from seven plant species were evaluated. The fraction dichloromethane from Aureliana fasciculata var. fasciculata (AFfPD) and the crude extract of Piper tectoniifolium (PTFrE) showed promising trypanosomicidal activity. AFfPD and PTFrE presented EC50 values 10.7 ± 2.8 μg/mL and 12.85 ± 1.52 μg/mL against intracellular forms (Tulahuen strain), respectively. Additionally, both were active upon bloodstream trypomastigotes (Y strain), exhibiting EC50 2.2 ± 1.0 μg/mL and 38.8 ± 2.1 μg/mL for AFfPD and PTFrE, respectively. Importantly, AFfPD is about five-fold more potent than Benznidazole (Bz), the reference drug for CD, also reaching lower EC90 value (7.92 ± 2.2 μg/mL) as compared to Bz (23.3 ± 0.6 μg/mL). Besides, anti-parasitic effect of eight purified botanic substances was also investigated. Aurelianolide A and B (compounds 1 and 2) from A. fasciculata and compound 8 from P. tuberculatum displayed the best trypanosomicidal effect. Compounds 1, 2 and 8 showed EC50 of 4.6 ± 1.3 μM, 1.6 ± 0.4 μM and 8.1 ± 0.9 μM, respectively against intracellular forms. In addition, in silico analysis of these three biomolecules was performed to predict parameters of absorption, distribution, metabolism and excretion. The studied compounds presented similar ADMET profile as Bz, without presenting mutagenicity and hepatotoxicity aspects as predicted for Bz. Our findings indicate that these natural products have promising anti-T. cruzi effect and may represent new scaffolds for future lead optimization.
Collapse
Affiliation(s)
- Raiza B. Peres
- Laboratório de Biologia Celular, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (FIOCRUZ), Avenida Brasil 4365, Manguinhos, Rio de Janeiro 210360-040, Brazil; (R.B.P.); (L.F.d.A.F.); (P.B.d.S.); (M.M.B.)
| | - Ludmila F. de A. Fiuza
- Laboratório de Biologia Celular, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (FIOCRUZ), Avenida Brasil 4365, Manguinhos, Rio de Janeiro 210360-040, Brazil; (R.B.P.); (L.F.d.A.F.); (P.B.d.S.); (M.M.B.)
| | - Patrícia B. da Silva
- Laboratório de Biologia Celular, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (FIOCRUZ), Avenida Brasil 4365, Manguinhos, Rio de Janeiro 210360-040, Brazil; (R.B.P.); (L.F.d.A.F.); (P.B.d.S.); (M.M.B.)
| | - Marcos M. Batista
- Laboratório de Biologia Celular, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (FIOCRUZ), Avenida Brasil 4365, Manguinhos, Rio de Janeiro 210360-040, Brazil; (R.B.P.); (L.F.d.A.F.); (P.B.d.S.); (M.M.B.)
| | - Flávia da C. Camillo
- Laboratório de Tecnologia para Biodiversidade em Saúde/LDFito, Instituto de Tecnologia em Fármacos (Farmanguinhos), Fundação Oswaldo Cruz (FIOCRUZ), Avenida Brasil 4365, Manguinhos, Rio de Janeiro 210360-040, Brazil; (F.d.C.C.); (A.M.M.); (L.d.C.B.); (M.R.F.)
| | - André M. Marques
- Laboratório de Tecnologia para Biodiversidade em Saúde/LDFito, Instituto de Tecnologia em Fármacos (Farmanguinhos), Fundação Oswaldo Cruz (FIOCRUZ), Avenida Brasil 4365, Manguinhos, Rio de Janeiro 210360-040, Brazil; (F.d.C.C.); (A.M.M.); (L.d.C.B.); (M.R.F.)
| | - Lavínia de C. Brito
- Laboratório de Tecnologia para Biodiversidade em Saúde/LDFito, Instituto de Tecnologia em Fármacos (Farmanguinhos), Fundação Oswaldo Cruz (FIOCRUZ), Avenida Brasil 4365, Manguinhos, Rio de Janeiro 210360-040, Brazil; (F.d.C.C.); (A.M.M.); (L.d.C.B.); (M.R.F.)
| | - Maria R. Figueiredo
- Laboratório de Tecnologia para Biodiversidade em Saúde/LDFito, Instituto de Tecnologia em Fármacos (Farmanguinhos), Fundação Oswaldo Cruz (FIOCRUZ), Avenida Brasil 4365, Manguinhos, Rio de Janeiro 210360-040, Brazil; (F.d.C.C.); (A.M.M.); (L.d.C.B.); (M.R.F.)
| | - Maria de N. C. Soeiro
- Laboratório de Biologia Celular, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (FIOCRUZ), Avenida Brasil 4365, Manguinhos, Rio de Janeiro 210360-040, Brazil; (R.B.P.); (L.F.d.A.F.); (P.B.d.S.); (M.M.B.)
- Correspondence: ; Tel.: +55-(21)-2562-1368
| |
Collapse
|
6
|
Almeida AA, Lima GDA, Simão MVRC, Moreira GA, Siqueira RP, Zanatta AC, Vilegas W, Machado‐Neves M, Bressan GC, Leite JPV. Screening of plants from the Brazilian Atlantic Forest led to the identification of Athenaea velutina (Solanaceae) as a novel source of antimetastatic agents. Int J Exp Pathol 2020; 101:106-121. [PMID: 32452573 PMCID: PMC7370850 DOI: 10.1111/iep.12351] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 01/22/2020] [Accepted: 03/23/2020] [Indexed: 12/26/2022] Open
Abstract
Plant biodiversity is a source of potential natural products for the treatment of many diseases. One of the ways of discovering new drugs is through the cytotoxic screening of extract libraries. The present study evaluated 196 extracts prepared by maceration of Brazilian Atlantic Forest trees with organic solvents and distilled water for cytotoxic and antimetastatic activity. The MTT assay was used to screen the extract activity in MCF-7, HepG2 and B16F10 cancer cells. The highest cytotoxic extract had antimetastatic activity, as determined in in vitro assays and melanoma murine model. The organic extract of the leaves of Athenaea velutina (EAv) significantly inhibited migration, adhesion, invasion and cell colony formation in B16F10 cells. The phenolic compounds and flavonoids in EAv were identified for the first time, using flow injection with electrospray negative ionization-ion trap tandem mass spectrometry analysis (FIA-ESI-IT-MSn ). EAv markedly suppressed the development of pulmonary melanomas following the intravenous injection of melanoma cells to C57BL/6 mice. Stereological analysis of the spleen cross-sections showed enlargement of the red pulp area after EAv treatment, which indicated the activation of the haematopoietic system. The treatment of melanoma-bearing mice with EAv did not result in liver damage. In conclusion, these findings suggest that A velutina is a source of natural products with potent antimetastatic activity.
Collapse
Affiliation(s)
- Alisson A. Almeida
- Departamento de Bioquímica e Biologia MolecularUniversidade Federal de ViçosaMinas GeraisBrazil
| | - Graziela D. A. Lima
- Departamento de Biologia GeralUniversidade Federal de ViçosaMinas GeraisBrazil
| | | | - Gabriela A. Moreira
- Departamento de Bioquímica e Biologia MolecularUniversidade Federal de ViçosaMinas GeraisBrazil
| | - Raoni P. Siqueira
- Departamento de Bioquímica e Biologia MolecularUniversidade Federal de ViçosaMinas GeraisBrazil
| | | | | | | | - Gustavo C. Bressan
- Departamento de Bioquímica e Biologia MolecularUniversidade Federal de ViçosaMinas GeraisBrazil
| | - João P. V. Leite
- Departamento de Bioquímica e Biologia MolecularUniversidade Federal de ViçosaMinas GeraisBrazil
| |
Collapse
|
7
|
Leishmanicidal Activity of Withanolides from Aureliana Fasciculata var. Fasciculata. Molecules 2018; 23:molecules23123160. [PMID: 30513673 PMCID: PMC6320798 DOI: 10.3390/molecules23123160] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 11/23/2018] [Accepted: 11/27/2018] [Indexed: 12/17/2022] Open
Abstract
Leishmaniasis is the generic denomination to the neglected diseases caused by more than 20 species of protozoa belonging to the genus Leishmania. The toxic and parenteral-delivered pentavalent antimonials remain to be the first-line treatment. However, all the current used drugs have restrictions. The species Aureliana fasciculata (Vell.) Sendtner var. fasciculata is a native Brazilian species parsimoniously studied on a chemical point of view. In this study, the antileishmanial activity of A. fasciculata was evaluated. Among the evaluated samples of the leaves, the dichloromethane partition (AFfDi) showed the more pronounced activity, with IC50 1.85 µg/ml against promastigotes of L. amazonensis. From AFfDi, two active withanolides were isolated, the Aurelianolides A and B, with IC50 7.61 μM and 7.94 μM, respectively. The withanolides also proved to be active against the clinically important form, the intracellular amastigote, with IC50 2.25 μM and 6.43 μM for Aurelianolides A and B, respectively. Furthermore, withanolides showed results for in silico parameters of absorption, distribution, metabolism, excretion, and toxicity (ADMET) similar to miltefosine, the reference drug, and were predicted as good oral drugs, with the advantage of not being hepatotoxic. These results suggest that these compounds can be useful as scaffolds for planning drug design.
Collapse
|
8
|
Silva EL, Almeida-Lafetá RC, Borges RM, Staerk D. Athenolide A, a New Steroidal Lactone from the Leaves ofAthenaea martiana(Solanaceae) Determined by Means of HPLC-HR-MS-SPE-NMR Analysis. Chem Biodivers 2017; 15. [DOI: 10.1002/cbdv.201700455] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Accepted: 10/27/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Eder L. Silva
- Instituto de Pesquisas de Produtos Naturais Walter Mors; Centro de Ciências da Saúde; Universidade Federal do Rio de Janeiro; Rio de Janeiro 21941-902 Brazil
| | - Rita C. Almeida-Lafetá
- Instituto de Pesquisas de Produtos Naturais Walter Mors; Centro de Ciências da Saúde; Universidade Federal do Rio de Janeiro; Rio de Janeiro 21941-902 Brazil
| | - Ricardo M. Borges
- Instituto de Pesquisas de Produtos Naturais Walter Mors; Centro de Ciências da Saúde; Universidade Federal do Rio de Janeiro; Rio de Janeiro 21941-902 Brazil
| | - Dan Staerk
- Department of Drug Design and Pharmacology; Faculty of Healthy and Medicinal Sciences; University of Copenhagen; Universitetsparken 2 Copenhagen DK-2100 Denmark
| |
Collapse
|
9
|
Schirmer Pigatto AG, Mentz LA, Gonçalves Soares GL. Chemotaxonomic characterization and chemical similarity of tribes/genera of the Solanoideae subfamily (Solanaceae) based on occurrence of withanolides. BIOCHEM SYST ECOL 2014. [DOI: 10.1016/j.bse.2013.12.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
10
|
Zhang H, Samadi AK, Cohen MS, Timmermann BN. Anti-proliferative withanolides from the Solanaceae: a structure-activity study. PURE APPL CHEM 2012; 84:1353-1367. [PMID: 24098060 PMCID: PMC3789375 DOI: 10.1351/pac-con-11-10-08] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
As part of our search for bioactive compounds from plant biodiversity, 29 withanolides (1, 3-6, 9, 12-18, and 20-35) were recently isolated from three members of the Solanaceae: Physalis longifolia, Vassobia breviflora, and Withania somnifera. Six derivatives (2, 7, 8, 10, 11, and 19) were prepared from these naturally occurring withanolides. All compounds (1-35) were evaluated for in vitro anti-proliferative activity against an array of cell lines [melanoma cell lines (B16F10, SKMEL28); human head and neck squamous cell carcinomas (HNSCC) cell lines (JMAR, MDA1986, DR081-1); breast cancer cell line (Hs578T), and non-malignant human cell line (MRC5)]. This led to the discovery of 15 withanolides, with IC50 values in the range of 0.067-17.4 µM, including withaferin A 1, withaferin A 4,27-diacetate 2, 27-O-glucopyranosylwithaferin A 3, withalongolide H 4, withalongolide C 5, withalongolide A 6, withalongolide A 4,27-diacetate 7, withalongolide A 4,19,27-triacetate 8, withalongolide B 9, withalongolide B 4-acetate 10, withalongolide B 4,19-diacetate 11, withalongolide D 16, withalongolide E 17, withalongolide G 21, and 2,3-dihydrowithaferin A 3-O-sulfate 22). In order to update the growing literature on withanolides and their activities, we summarized the distribution, structural types and anti-proliferative activities for all published withanolides to date. The structure-activity relationship analysis (SARA) confirmed the importance of the presence of a Δ2-1-oxo- functionality in ring A, a 5β,6β-epoxy or 5α-chloro-6β-hydroxy groupings in ring B, and nine carbon side chain with a lactone moiety for cytotoxic activity. Conversely, the SARA indicated that the -OH or -OR groups at C-4, 7, 11, 12, 14, 15, 16, 17, 18, 19, 20, 23, 24, 27, 28 were not contributors to the observed anti-proliferative activity within the systems analyzed.
Collapse
Affiliation(s)
- Huaping Zhang
- Department of Medicinal Chemistry, School of Pharmacy, University of Kansas, Lawrence, KS 66045, United States
| | - Abbas K. Samadi
- Department of Surgery, School of Medicine, University of Kansas Medical Center, Kansas City, KS 66160, United States
| | - Mark S. Cohen
- Department of Surgery, School of Medicine, University of Kansas Medical Center, Kansas City, KS 66160, United States
| | - Barbara N. Timmermann
- Department of Medicinal Chemistry, School of Pharmacy, University of Kansas, Lawrence, KS 66045, United States
| |
Collapse
|