1
|
Moraes de Farias K, Rosa-Ribeiro R, Souza EE, Kobarg J, Banwell MG, de Brito Vieira Neto J, Leyenne Alves Sales S, Roberto Ribeiro Costa P, Cavalcante Dos Santos R, Vilaça Gaspar F, Gomes Barreto Junior A, da Conceição Ferreira Oliveira M, Odorico de Moraes M, Libardi M Furtado C, Carvalho HF, Pessoa C. The Isoflavanoid (+)-PTC Regulates Cell-Cycle Progression and Mitotic Spindle Assembly in a Prostate Cancer Cell Line. Chem Biodivers 2022; 19:e202200102. [PMID: 35362194 DOI: 10.1002/cbdv.202200102] [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: 01/31/2022] [Accepted: 03/31/2022] [Indexed: 12/24/2022]
Abstract
Prostate cancer is the second most common malignancy in men and the development of effective therapeutic strategies remains challenging when more advanced, androgen-independent or insensitive forms are involved. Accordingly, we have evaluated, using flow cytometry, confocal microscopy and image analysis, the anti-proliferative effects of (+)-2,3,9-trimethoxypterocarpan [(+)-PTC, 1] on relevant human prostate cancer cells as well as its capacity to control mitosis within them. In particular, the studies reported herein reveal that (+)-PTC exerts anti-proliferative activity against the PC-3 cell lines by regulating cell-cycle progression with mitosis being arrested in the prophase or prometaphase. Furthermore, it emerges that treatment of the target cells with this compound results in the formation of monopolar spindles, disorganized centrosomes and extensively disrupted γ-tubulin distributions while centriole replication remains unaffected. Such effects suggest (+)-PTC should be considered as a possible therapy for androgen-insensitive/independent prostate cancer.
Collapse
Affiliation(s)
- Kaio Moraes de Farias
- Programa de Pós-Graduação em Biotecnologia - RENORBIO - Rede Nordeste de Biotecnologia, Federal University of Ceará - UFC, 60020-181, Fortaleza, CE, Brazil.,Núcleo de Pesquisa e Desenvolvimento de Medicamentos - NPDM, Federal University of Ceará - UFC, Fortaleza, CE 60430-275, Brazil
| | - Rafaela Rosa-Ribeiro
- Department of Structural and Functional Biology, Biology Institute, State University of Campinas, Campinas, 13083-970, SP, Brazil
| | - Edmarcia E Souza
- Faculdade de Ciências Farmacêuticas, State University of Campinas, Campinas, 13083-859, SP, Brazil
| | - Jörg Kobarg
- Faculdade de Ciências Farmacêuticas, State University of Campinas, Campinas, 13083-859, SP, Brazil
| | - Martin G Banwell
- Institute for Advanced and Applied Chemical Synthesis, Jinan University, Guangzhou, 510632, China
| | - José de Brito Vieira Neto
- Núcleo de Pesquisa e Desenvolvimento de Medicamentos - NPDM, Federal University of Ceará - UFC, Fortaleza, CE 60430-275, Brazil
| | - Sarah Leyenne Alves Sales
- Núcleo de Pesquisa e Desenvolvimento de Medicamentos - NPDM, Federal University of Ceará - UFC, Fortaleza, CE 60430-275, Brazil
| | - Paulo Roberto Ribeiro Costa
- Laboratório de Química Bioorgânica (LQB), Instituto de Pesquisas de Produtos Naturais, Universidade Federal do Rio de Janeiro, Rio de Janeiro, 21941-909, RJ, Brazil
| | - Rafael Cavalcante Dos Santos
- Engenharia de Processos Químicos e Bioquímicos (EPQB), Escola de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, 21941-909, RJ, Brazil
| | - Francisco Vilaça Gaspar
- Laboratório de Química Bioorgânica (LQB), Instituto de Pesquisas de Produtos Naturais, Universidade Federal do Rio de Janeiro, Rio de Janeiro, 21941-909, RJ, Brazil
| | - Amaro Gomes Barreto Junior
- Engenharia de Processos Químicos e Bioquímicos (EPQB), Escola de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, 21941-909, RJ, Brazil
| | | | - Manoel Odorico de Moraes
- Núcleo de Pesquisa e Desenvolvimento de Medicamentos - NPDM, Federal University of Ceará - UFC, Fortaleza, CE 60430-275, Brazil
| | - Cristiana Libardi M Furtado
- Núcleo de Pesquisa e Desenvolvimento de Medicamentos - NPDM, Federal University of Ceará - UFC, Fortaleza, CE 60430-275, Brazil.,Experimental Biology Center - NUBEX, University of Fortaleza, UNIFOR, Fortaleza, CE 60811-905, Brazil
| | - Hernandes F Carvalho
- Department of Structural and Functional Biology, Biology Institute, State University of Campinas, Campinas, 13083-970, SP, Brazil
| | - Claudia Pessoa
- Programa de Pós-Graduação em Biotecnologia - RENORBIO - Rede Nordeste de Biotecnologia, Federal University of Ceará - UFC, 60020-181, Fortaleza, CE, Brazil.,Núcleo de Pesquisa e Desenvolvimento de Medicamentos - NPDM, Federal University of Ceará - UFC, Fortaleza, CE 60430-275, Brazil
| |
Collapse
|
2
|
Gaspar FV, Marques Ribeiro S, Barcellos JCF, Monteiro S, Domingos JLO, Claudia Dos Santos Luciano M, Paier CRK, Pessoa C, Costa PRR. New 5-carba-pterocarpans: Synthesis and preliminary antiproliferative activity on a panel of human cancer cells. Bioorg Chem 2021; 107:104584. [PMID: 33453646 DOI: 10.1016/j.bioorg.2020.104584] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 12/18/2020] [Accepted: 12/21/2020] [Indexed: 10/22/2022]
Abstract
Natural pterocarpans and synthetic 5-carba-pterocarpans are isosteres in which the oxygen atom at position 5 in the pyran-ring of pterocarpans is replaced by a methylene group. These 5-carba-analogues were obtained in good yields through the palladium-catalyzed oxyarylation of alcoxy-1,2-dihydronaphthalens with o-iodophenols in PEG-400. They were evaluated on human cancer cell lineages derived respectively from prostate tumor (PC3, IC50 = 11.84 μmol L-1, SI > 12)) and acute myeloid leukemia (HL-60, IC50 = 8.81 μmol L-1, SI > 16), highly incident cancer types presenting resistance against traditional chemotherapeutics. Compound 6c (LQB-492) was the most potent (IC50 = 3.85 μmol L-1, SI > 37) in SF-295 cell lineage (glioblastoma). Such findings suggest that 5-carba-pterocarpan can potentially be new hit compounds for further development of novel antiproliferative agents.
Collapse
Affiliation(s)
- Francisco V Gaspar
- Laboratório de Química Bioorgânica, Instituto de Pesquisas de Produtos Naturais, Universidade Federal do Rio de Janeiro, Centro de Ciências da Saúde, Bloco H, Ilha da Cidade Universitária, 21941-590 Rio de Janeiro, RJ, Brazil
| | - Soraya Marques Ribeiro
- Laboratório de Oncologia Experimental, Núcleo de Pesquisa e Desenvolvimento de Medicamentos, Universidade Federal do Ceará, Rodolfo Teófilo, 60430-275 Fortaleza, CE, Brasil
| | - Júlio C F Barcellos
- Laboratório de Química Bioorgânica, Instituto de Pesquisas de Produtos Naturais, Universidade Federal do Rio de Janeiro, Centro de Ciências da Saúde, Bloco H, Ilha da Cidade Universitária, 21941-590 Rio de Janeiro, RJ, Brazil
| | - Samuel Monteiro
- Laboratório de Química Bioorgânica, Instituto de Pesquisas de Produtos Naturais, Universidade Federal do Rio de Janeiro, Centro de Ciências da Saúde, Bloco H, Ilha da Cidade Universitária, 21941-590 Rio de Janeiro, RJ, Brazil
| | - Jorge L O Domingos
- Instituto de Química, Universidade do Estado do Rio de Janeiro, R.S. Francisco Xavier 524, Rio de Janeiro 20550-900, RJ, Brazil
| | - Maria Claudia Dos Santos Luciano
- Laboratório de Oncologia Experimental, Núcleo de Pesquisa e Desenvolvimento de Medicamentos, Universidade Federal do Ceará, Rodolfo Teófilo, 60430-275 Fortaleza, CE, Brasil
| | - Carlos R K Paier
- Laboratório de Oncologia Experimental, Núcleo de Pesquisa e Desenvolvimento de Medicamentos, Universidade Federal do Ceará, Rodolfo Teófilo, 60430-275 Fortaleza, CE, Brasil
| | - Cláudia Pessoa
- Laboratório de Oncologia Experimental, Núcleo de Pesquisa e Desenvolvimento de Medicamentos, Universidade Federal do Ceará, Rodolfo Teófilo, 60430-275 Fortaleza, CE, Brasil
| | - Paulo R R Costa
- Laboratório de Química Bioorgânica, Instituto de Pesquisas de Produtos Naturais, Universidade Federal do Rio de Janeiro, Centro de Ciências da Saúde, Bloco H, Ilha da Cidade Universitária, 21941-590 Rio de Janeiro, RJ, Brazil
| |
Collapse
|
3
|
Farias K, da Costa RF, Meira AS, Diniz-Filho J, Bezerra EM, Freire VN, Guest P, Nikahd M, Ma X, Gardiner MG, Banwell MG, de Oliveira MDCF, de Moraes MO, do Ó Pessoa C. Antitumor Potential of the Isoflavonoids (+)- and (-)-2,3,9-Trimethoxypterocarpan: Mechanism-of-Action Studies. ACS Med Chem Lett 2020; 11:1274-1280. [PMID: 32551011 DOI: 10.1021/acsmedchemlett.0c00097] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 05/20/2020] [Indexed: 12/23/2022] Open
Abstract
Synthetically derived samples of (+)-(6aS,11aS)-2,3,9-trimethoxypterocarpan [(+)-1] and its enantiomer [(-)-1], both of which are examples of naturally occurring isoflavonoids, were evaluated, together with the corresponding racemate, as cytotoxic agents against the HL-60, HCT-116, OVCAR-8, and SF-295 tumor cell lines. As a result it was established that compound (+)-1 was particularly active with OVCAR-8 cells being the most sensitive and responding in a dose-dependent manner. A study of cell viability and drug-induced morphological changes revealed the compound causes cell death through a mechanism characteristic of apoptosis. Finally, a computational study of the interactions of compound (+)-1 and (S)-monastrol, an established, synthetically derived, potent, and cell-permeant inhibitor of mitosis, with the kinesin-type protein Eg5 revealed that both bind to this receptor in a similar manner. Significantly, compound (+)-1 binds with greater affinity, an effect attributed to the presence of the associated methoxy groups.
Collapse
Affiliation(s)
- Kaio Farias
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Fortaleza, CE 60430-275, Brazil
| | - Roner F. da Costa
- Department of Natural Sciences, Mathematics and Statistics, Federal Rural University of the Semi-Arid Region - UFERSA, Mossoró - RN 59625-900, Brazil
| | - Assuero S. Meira
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Fortaleza, CE 60430-275, Brazil
| | - Jairo Diniz-Filho
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Fortaleza, CE 60430-275, Brazil
| | - Eveline M. Bezerra
- Department of Natural Sciences, Mathematics and Statistics, Federal Rural University of the Semi-Arid Region - UFERSA, Mossoró - RN 59625-900, Brazil
| | - Valder N. Freire
- Department of Physics, Science Center, Federal University of Ceará, Fortaleza, CE 60430-275, Brazil
| | - Prue Guest
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
| | - Maryam Nikahd
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
| | - Xinghua Ma
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
| | - Michael G. Gardiner
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
| | - Martin G. Banwell
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
- Institute for Advanced and Applied Chemical Synthesis, Jinan University, Guangzhou 510632, China
| | - Maria da C. F. de Oliveira
- Department of Organic and Inorganic Chemistry, Science Center, Federal University of Ceará, Fortaleza, CE 60430-275, Brazil
| | - Manoel O. de Moraes
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Fortaleza, CE 60430-275, Brazil
| | - Claudia do Ó Pessoa
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Fortaleza, CE 60430-275, Brazil
| |
Collapse
|
4
|
Wen R, Lv HN, Jiang Y, Tu PF. Anti-inflammatory pterocarpanoids from the roots of Pongamia pinnata. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2019; 21:859-866. [PMID: 30678493 DOI: 10.1080/10286020.2018.1529759] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 09/24/2018] [Accepted: 09/24/2018] [Indexed: 06/09/2023]
Abstract
A phytochemical study on the roots of Pongamia pinnata afforded 11 pterocarpanoids, including three new compounds. The structures of the isolated compounds were determined by 1D and 2D NMR and HRESIMS data. The absolute configurations of the new compounds were assigned via analysis of the specific rotations and electronic circular dichroism (ECD) spectra. The isolates were evaluated for their inhibitory effects on nitric oxide (NO) production in LPS-stimulated BV-2 microglial cells. Six compounds exhibited inhibitory effects against NO production, and compound 5 showed the best activity with an IC50 value at 12.0 μM.
Collapse
Affiliation(s)
- Ran Wen
- a State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , Beijing 100191 , China
- b School of Pharmacy, Hebei Medical University , Shijiazhuang 050017 , China
| | - Hai-Ning Lv
- a State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , Beijing 100191 , China
| | - Yong Jiang
- a State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , Beijing 100191 , China
| | - Peng-Fei Tu
- a State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , Beijing 100191 , China
| |
Collapse
|
5
|
Paier CRK, Maranhão SS, Carneiro TR, Lima LM, Rocha DD, da Silva Santos R, de Farias KM, de Moraes-Filho MO, Pessoa C. Natural products as new antimitotic compounds for anticancer drug development. Clinics (Sao Paulo) 2018; 73:e813s. [PMID: 30540125 PMCID: PMC6256996 DOI: 10.6061/clinics/2018/e813s] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 10/09/2018] [Indexed: 12/19/2022] Open
Abstract
Cell cycle control genes are frequently mutated in cancer cells, which usually display higher rates of proliferation than normal cells. Dysregulated mitosis leads to genomic instability, which contributes to tumor progression and aggressiveness. Many drugs that disrupt mitosis have been studied because they induce cell cycle arrest and tumor cell death. These antitumor compounds are referred to as antimitotics. Vinca alkaloids and taxanes are natural products that target microtubules and inhibit mitosis, and their derivatives are among the most commonly used drugs in cancer therapy worldwide. However, severe adverse effects such as neuropathies are frequently observed during treatment with microtubule-targeting agents. Many efforts have been directed at developing improved antimitotics with increased specificity and decreased likelihood of inducing side effects. These new drugs generally target specific components of mitotic regulation that are mainly or exclusively expressed during cell division, such as kinases, motor proteins and multiprotein complexes. Such small molecules are now in preclinical studies and clinical trials, and many are products or derivatives from natural sources. In this review, we focused on the most promising targets for the development of antimitotics and discussed the advantages and disadvantages of these targets. We also highlighted the novel natural antimitotic agents under investigation by our research group, including combretastatins, withanolides and pterocarpans, which show the potential to circumvent the main issues in antimitotic therapy.
Collapse
Affiliation(s)
- Carlos Roberto Koscky Paier
- Laboratorio de Oncologia Experimental, Nucleo de Pesquisa e Desenvolvimento de Medicamentos (NPDM), Universidade Federal do Ceara, Fortaleza, CE, BR
- *Corresponding author. E-mail:
| | - Sarah Sant'Anna Maranhão
- Laboratorio de Oncologia Experimental, Nucleo de Pesquisa e Desenvolvimento de Medicamentos (NPDM), Universidade Federal do Ceara, Fortaleza, CE, BR
- Programa de Pos graduacao em Farmacologia, Universidade Federal do Ceara, Fortaleza, CE, BR
| | - Teiliane Rodrigues Carneiro
- Laboratorio de Oncologia Experimental, Nucleo de Pesquisa e Desenvolvimento de Medicamentos (NPDM), Universidade Federal do Ceara, Fortaleza, CE, BR
- Programa de Pos graduacao em Biotecnologia, Rede Nordeste de Biotecnologia (RENORBIO), Universidade Federal do Ceara, Fortaleza, CE, BR
- Laboratorio de Avaliacao e Sintese de Substancias Bioativas (LASSBio), Instituto de Ciencia e Tecnologia de Farmacos e Medicamentos (INCT-INOFAR), Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, BR
| | - Lídia Moreira Lima
- Laboratorio de Avaliacao e Sintese de Substancias Bioativas (LASSBio), Instituto de Ciencia e Tecnologia de Farmacos e Medicamentos (INCT-INOFAR), Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, BR
| | - Danilo Damasceno Rocha
- Laboratorio de Oncologia Experimental, Nucleo de Pesquisa e Desenvolvimento de Medicamentos (NPDM), Universidade Federal do Ceara, Fortaleza, CE, BR
| | - Renan da Silva Santos
- Laboratorio de Oncologia Experimental, Nucleo de Pesquisa e Desenvolvimento de Medicamentos (NPDM), Universidade Federal do Ceara, Fortaleza, CE, BR
- Programa de Pos graduacao em Farmacologia, Universidade Federal do Ceara, Fortaleza, CE, BR
| | - Kaio Moraes de Farias
- Laboratorio de Oncologia Experimental, Nucleo de Pesquisa e Desenvolvimento de Medicamentos (NPDM), Universidade Federal do Ceara, Fortaleza, CE, BR
- Programa de Pos graduacao em Biotecnologia, Rede Nordeste de Biotecnologia (RENORBIO), Universidade Federal do Ceara, Fortaleza, CE, BR
| | - Manoel Odorico de Moraes-Filho
- Laboratorio de Oncologia Experimental, Nucleo de Pesquisa e Desenvolvimento de Medicamentos (NPDM), Universidade Federal do Ceara, Fortaleza, CE, BR
- Programa de Pos graduacao em Farmacologia, Universidade Federal do Ceara, Fortaleza, CE, BR
- Programa de Pos graduacao em Biotecnologia, Rede Nordeste de Biotecnologia (RENORBIO), Universidade Federal do Ceara, Fortaleza, CE, BR
| | - Claudia Pessoa
- Laboratorio de Oncologia Experimental, Nucleo de Pesquisa e Desenvolvimento de Medicamentos (NPDM), Universidade Federal do Ceara, Fortaleza, CE, BR
- Programa de Pos graduacao em Farmacologia, Universidade Federal do Ceara, Fortaleza, CE, BR
- Programa de Pos graduacao em Biotecnologia, Rede Nordeste de Biotecnologia (RENORBIO), Universidade Federal do Ceara, Fortaleza, CE, BR
| |
Collapse
|
6
|
The Role of the MAPK Signaling, Topoisomerase and Dietary Bioactives in Controlling Cancer Incidence. Diseases 2017; 5:diseases5020013. [PMID: 28933366 PMCID: PMC5547980 DOI: 10.3390/diseases5020013] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 04/16/2017] [Accepted: 04/19/2017] [Indexed: 12/16/2022] Open
Abstract
Reactive oxygen species (ROS) are common products of mitochondrial oxidative phosphorylation, xenobiotics metabolism and are generated in response to several environmental stress conditions. Some of them play important biochemical roles in cellular signal transduction and gene transcription. On the other hand, ROS are known to be involved in a wide range of human diseases, including cancer. The excessive production of such ROS together with disruption of homeostasis detoxifying mechanisms can mediate a series of cellular oxidative stresses. The oxidative stress of redundant free radicals production can lead to oxidative denaturation of cellular macromolecules including proteins, lipids and DNA. Moreover, oxidative damage is one of the major causes of DNA mutations, replication errors and genomic abnormalities which result in either inhibition or induction of transcription, and end with the disturbance of signal transduction pathways. Among affected signaling pathways are redox-sensitive kinases. The stimulation of these kinases induces several transcription factors through the phosphorylation of their module proteins. The activation of such pathways induces proliferation and cellular transformation. A diet rich in antioxidant compounds has potential health benefits, and there is a growing interest in the role of natural antioxidants in nutrition for prevention and cure of cancer diseases. A controversy has risen regarding the relation between antioxidants and the significant decrease in the risk of cancer incidence. In this review, we will focus on redox-sensitive kinases signaling pathways, highlighting the effects of dietary antioxidant on the prevention, incidence, prognosis or even treatment of human cancers. In addition, we will place emphasis on the chemical classes of pterocarpans as natural anti-oxidants/cancers as well as their underlying mechanisms of action, including their effects on MAPKs and topoisomerase activities.
Collapse
|
7
|
Militão GCG, Pinheiro SM, Dantas INF, Pessoa C, de Moraes MO, Costa-Lotufo LCV, Lima MAS, Silveira ER. Bioassay-guided fractionation of pterocarpans from roots of Harpalyce brasiliana Benth. Bioorg Med Chem 2007; 15:6687-91. [PMID: 17764956 DOI: 10.1016/j.bmc.2007.08.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2007] [Revised: 07/31/2007] [Accepted: 08/06/2007] [Indexed: 11/25/2022]
Abstract
Pterocarpans, a special kind of isoflavonoids possessing two contiguous benzofuran and benzopyran rings, have been reported as possessing several biological activities. In order to isolate and identify the active principles possibly responsible for the stronger activity of the EtOH extract from roots of Harpalyce brasiliana on the antimitotic assay using sea urchin egg development, a bioassay-guided fractionation was performed. Six bioactive pterocarpan derivatives: 4'-dehydroxycabenegrin A-I, leiocarpin, medicarpin, cabenegrins A-I and A-II, and maackiain were isolated from the chloroform fraction of H. brasiliana extract. Leiocarpin was the most active on the sea urchin egg assay with IC(50) values ranging from 0.1 to 1.2 microg/mL, followed by 4'-dehydroxycabenegrin A-I. The isolated compounds were also tested for cytotoxicity against tumor cell lines in cultures, where 4'-dehydroxycabenegrin A-I was the most active, followed by leiocarpin. Additionally, some studies on the structure-activity relationship of these pterocarpans are suggested.
Collapse
Affiliation(s)
- Gardenia C G Militão
- Departamento de Fisiologia e Farmacologia, Faculdade de Medicina, Universidade Federal do Ceará, Caixa Postal 3157, 60430-270 Fortaleza, Ceará, Brazil
| | | | | | | | | | | | | | | |
Collapse
|