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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Genotoxic assessment of Rubus imperialis (Rosaceae) extract in vivo and its potential chemoprevention against cyclophosphamide-induced DNA damage

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Costa Rodrigues Alves, Ana Beatriz [1] ; dos Santos, Rafaella Souza [1] ; Calil, Susana de Santana [1] ; Niero, Rivaldo [2] ; Lopes, Jhonny da Silva [2] ; Perazzo, Fabio E. [3] ; Pires Rosa, Paulo Cesar [3] ; Andrade, Sergio Faloni [2] ; Cechinel-Filho, Valdir [2] ; Maistro, Edson Luis [1]
Número total de Autores: 10
Afiliação do(s) autor(es):
[1] Univ Estadual Paulista, Fac Filosofia & Ciencias, Dept Fonoaudiol, UNESP, BR-17525900 Sao Paulo - Brazil
[2] Univ Vale Itajai, Nucleo Invest Quim Farmaceut NIQFAR, Programa Posgrad Ciencias Farmaceut, UNIVALI, Itajai, SC - Brazil
[3] Univ Fed Sao Paulo, Inst Ciencias Ambientais Quim & Farmaceut, Dept Ciencias Exatas & Terra, UNIFESP, Sao Paulo - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Journal of Ethnopharmacology; v. 153, n. 3, p. 694-700, MAY 14 2014.
Citações Web of Science: 14

Ethnopharmacological relevance: Rubus imperialis Cham. Schl. (Rosaceae) is frequently used in traditional medicine as hypoglycemic, antinociceptive and antiviral remedy. Materials and methods: Swiss albino mice were distributed in eight groups for acute treatment with Rubus imperialis extract (24 h). The extract doses selected were 50, 250 and 500 mg/kg b.w. administered by gavage alone or plus to CPA (50 mg/kg b.w.) administered by intraperitoneal injection. Control groups were treated in a similar way. Analyses were performed using the comet assay, on leukocytes (collected 4 and 24 h after treatment) and liver (collected 24 h after treatment), and using the micronucleus test (MN) in bone marrow cells. Cytotoxicity was assessed by scoring 200 consecutive polychromatic (PCE) and normochromatic (NCE) erythrocytes (PCE/NCE ratio). Results and conclusion: The main compounds identified in the Rubus imperialis extract were saponins and steroidal compounds, with niga-ichigoside and tormentic acid being the major compounds. Tested doses of Rubus imperialis extract showed no genotoxic effects on leukocytes from peripheral blood or liver cells by the comet assay. However, the MN test showed an increase in the frequency of micronucleated cells at the two higher doses tested, indicating that this extract has clastogenic/aneugenic effects on bone marrow cells at higher doses. On the other hand, for all cells evaluated, the three tested doses of the Rubus imperialis extract promoted inhibition of DNA damage induced by CPA. Despite the chemoprevention observed, the clastogenicity/aneugenicity observed suggested caution about either continuous or high-dose usage of Rubus imperiale aerial parts extract by humans. (C) 2014 Elsevier Ireland Ltd. All rights reserved. (AU)

Processo FAPESP: 10/07577-3 - Investigação do potencial genotóxico do artesunato, da artemisinina, da 4-hidroxicumarina esculetina: implantação da metodologia de mutagênese in vitro
Beneficiário:Edson Luis Maistro
Linha de fomento: Auxílio à Pesquisa - Regular