Neolignans from Nectandra megapotamica (Lauraceae) Display in vitro Cytotoxic Activity and Induce Apoptosis in Leukemia Cells

Autor(es)

Ponci, Vitor ^[1] ; Figueiredo, Carlos R. ^[2] ; Massaoka, Mariana H. ^[2] ; de Farias, Camyla F. ^[2] ; Matsuo, Alisson L. ^[2] ; Sartorelli, Patricia ^[1] ; Lago, Joao Henrique G. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Paulo, Inst Ciencias Ambientais Quim & Farmaceut, BR-09972270 Diadema, SP - Brazil

^[2] Univ Fed Sao Paulo, Dept Microbiol Imunol & Parasitol, Rua Botucatu 862, BR-04023062 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Molecules; v. 20, n. 7, p. 12757-12768, JUL 2015.
• Citações Web of Science: 10

Resumo

Nectandra megapotamica (Spreng.) Mez. (Lauraceae) is a well-known Brazilian medicinal plant that has been used in folk medicine to treat several diseases. In continuation of our ongoing efforts to discover new bioactive natural products from the Brazilian flora, this study describes the identification of cytotoxic compounds from the MeOH extract of N. megapotamica (Lauraceae) leaves using bioactivity-guided fractionation. This approach resulted in the isolation and characterization of eight tetrahydrofuran neolignans: calopeptin (1), machilin-G (2), machilin-I (3), aristolignin (4), nectandrin A (5), veraguensin (6), ganschisandrin (7), and galgravin (8). Different assays were conducted to evaluate their cytotoxic activities and to determine the possible mechanism(s) related to the activity displayed against human leukemia cells. The most active compounds 4, 5 and 8 gave IC50 values of 14.2 +/- 0.7, 16.9 +/- 0.8 and 16.5 +/- 0.8 mu g/mL, respectively, against human leukemia (HL-60) tumor cells. Moreover, these compounds induced specific apoptotic hallmarks, such as plasma membrane bleb formation, nuclear DNA condensation, specific chromatin fragmentation, phosphatidyl-serine exposure on the external leaflet of the plasma membrane, cleavage of PARP as well as mitochondrial damage, which as a whole could be related to the intrinsic apoptotic pathway. (AU)

• Processo FAPESP: 15/11936-2 - Emprego da quimiodiversidade de espécies vegetais de áreas remanescentes da Mata Atlântica do Estado de São Paulo na seleção de protótipos biologicamente ativos
• Beneficiário: João Henrique Ghilardi Lago
• Modalidade de apoio: Auxílio à Pesquisa - Regular