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Molecules 2014, 19(4), 3973-3987; doi:10.3390/molecules19043973

First Chemical Evaluation and Toxicity of Casinga-cheirosa to Balb-c Male Mice

Graduate Program in Veterinary, Graduate and Research Vice-Dean Office, Paulista University, R. Dr. Bacelar, 1212, Vila Clementino, São Paulo 04026-002, Brazil
Center for Research in Biodiversity, Botany Laboratory and Herbarium UNIP and Extraction Laboratory, Paulista University, Av. Paulista, 900, 1° andar, Cerqueira César, São Paulo 01310-100, Brazil
Hospital São José, R. Martiniano de Carvalho, 965, Bela Vista, 1321-001, São Paulo, SP, Brazil
Education and Research Center, Sírio Libanês Hospital, R. Adma Jafet, 91, Bela Vista, São Paulo 01308-000, SP, Brazil
Medicine College, São Paulo University, LIM-62, Av. Dr. Arnaldo, 455, Pinheiros, São Paulo 01246-000, SP, Brazil
Graduate Program in Dentistry, Graduate and Research Vice-Dean Office, Paulista University, R. Dr. Bacelar, 1212, Vila Clementino, São Paulo 04026-002, Brazil
Author to whom correspondence should be addressed.
Received: 10 February 2014 / Revised: 27 February 2014 / Accepted: 13 March 2014 / Published: 2 April 2014
(This article belongs to the Section Natural Products)
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Laetia suaveolens, known as “casinga-cheirosa”, crude extract EB719 has previously shown cytotoxic activity against prostate cancer and squamous cell carcinoma. For the first time, seven molecules were isolated from its apolar—α-tocopherol (1) and sitosterol (2)—and polar—3-O-caffeoylquinic acid (3), 4-O-caffeoylquinic acid (4), 5-O-feruloylquinic acid (5), hyperoside (6), and isoquercitrin (7)—fractions. Acute toxicity was determined in a two-stage experiment: (1) a reduced number of Balb-c male mice received 5000 mg/kg of EB719 to allow evaluation of general activity and other 27 parameters, plus death, up to the establishment of non-lethal dose (NLD), as well as lethal dose 50% (LD50); (2) NLD was administered and diazepam introduced as reference drug. EB719 showed LD50 = 178.0 mg/kg, and NLD 156.3 mg/kg. In stage one EB719 did not influence general activity, but provoked impairment in grasp reflexes, tail squeeze and breathing; piloerection and cyanosis were increased. In stage two, alterations occurred in auricular reflex, piloerection and breathing after diazepam administration, but not in response to EB719. Intestinal hemorrhage caused by local bleeding was observed after necropsy, and may be the main cause of animals’ death other than a systemic effect of the extract. Although the isolated compounds are biologically and pharmacologically active in both men and animal systems, it is premature to relate their occurrence in EB719 to the observed intestine hemorrhage in mice. View Full-Text
Keywords: Laetia suaveolens; Salicaceae; toxicity; α-tocopherol; isoquercitrin Laetia suaveolens; Salicaceae; toxicity; α-tocopherol; isoquercitrin

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Estork, D.M.; Gusmão, D.F.; Paciencia, M.L.B.; Díaz, I.E.C.; Varella, A.D.; Younes, R.N.; Reis, L.F.L.; Montero, E.F.S.; Bernardi, M.M.; Suffredini, I.B. First Chemical Evaluation and Toxicity of Casinga-cheirosa to Balb-c Male Mice. Molecules 2014, 19, 3973-3987.

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