Sirlene Valério Tinti

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The genus Calea is reported for many biological activities such as antiinflammatory, antiplasmodial, antifungal, antimicrobial, and cytotoxic activities. Most of the pharmacological activities are credited to germacranolides, a sesquiterpene lactone common to this genus. Dried aerial parts of Calea pinnatifida Banks were extracted with dichloromethane,(More)
Anticancer drug research based on natural compounds enabled the discovery of many drugs currently used in cancer therapy. Here, we report the in vitro, in vivo and in silico anticancer and estrogen-like activity of Psidium guajava L. (guava) extracts and enriched mixture containing the meroterpenes guajadial, psidial A and psiguadial A and B. All samples(More)
The present study isolated three major active flavonoids, two flavones named 4',5,7-trimethoxy-luteolin (1) and 6-hydroxy-5,7-dimethoxyflavone (2) and the flavanone 5-hydroxy-6,7-dimethoxyflavanone (3) from Zeyheria montana dichloromethane leaf extract. Isolation and purification were conducted with the application of column chromatography and structures(More)
The protective effect of beef and pig collagen hydrolysates and their fractions were tested as anti-ulcerogenic agents in rats (weighing 250-350 g) against ulcerative lesions caused by ethanol. Beef and pig collagen hydrolysates were fractionated by ultrafiltration into different molecular weight fractions. The protocol employed a negative and a positive(More)
The effect of the administration of a whey protein isolate (WPI) and collagen hydrolysates on ethanol-induced ulcerative lesions was studied in rats. WPI and bovine or porcine collagen hydrolysate (BCH and PCH, respectively) were given to rats by gavage. In acute experiments, (single-dose) physiological saline (10 mL/kg of body weight) was used as the(More)
Goniothalamin (GTN), a styryl-lactone, is a secondary metabolite naturally found in its enantiomeric form (R) in plants of the genus Goniothalamus (Annonaceae). The antiproliferative activity against human tumor cell lines reported in several studies suggest that the α,β-unsaturated δ-lactone moiety emerges as a key Michael acceptor for cysteine residues or(More)
INTRODUCTION The pharmacological assessment of the factors for gastric protection of a test substance should involve experimental models that can determine the involvement of cytoprotective factors, as well as their influence on the secretion of hydrochloric acid. The original protocol of pylorus ligation in rats proposed by Shay et al. in 1945, still in(More)
Despite numerous studies with the Piper genus, there are no previous results reporting in vitro or in vivo Piper regnellii (Miq.) C. DC. var. regnellii anticancer activity. The aim of this study was to investigate P. regnellii in vitro and in vivo anticancer activity and further identify its active compounds. In vitro antiproliferative activity was(More)
Natural products remain an important source of new drugs, including anticancer drugs. Recently, our group reported the anticancer activity of eupomatenoid-5 (eup-5), a neolignan isolated from Piper regnellii (Miq.) C. DC. var. regnellii leaves. In vitro studies demonstrated that MCF-7 (breast) and 786-0 (kidney) were among the cancer cell lines most(More)
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