Many studies have reported that medicinal plant extracts can inhibit oral pathogen growth or adhesion to surfaces and therefore reduce dental caries formation. The addition of these extracts to oral products like mouthwashes and dentifrices is considered an important strategy in caries control. In this sense, we have developed a Mikania glomerata extract with high ent-kaurenoic acid content (KAMg). So, this work describes the preparation of such extract and the development of a validated HPLC-DAD method to determine its ent-kaurenoic acid (KA) content. Herein it is also described the KAMg in vitro antibacterial evaluation against several cariogenic bacteria in comparison with KA and the investigation of further aspects of the KAMg activity. Toxicological aspects of the developed extract were evaluated by assessing its cytotoxicity and genotoxicity. KA and a KA-rich extract like KAMg showed to inhibit the growth of microorganisms responsible for dental caries at relatively low MIC (Minimum inhibitory concentration) values, albeit not as low as the MIC value obtained for chlorhexidine digluconate (CHD), the golden anticariogenic standard approved by the American Dental Association Council on Dental Therapeutics. However, KAMg was more effective to inhibit the formation of a Streptococcus mutans biofilm with four times lower MICB50 (minimum inhibitory concentration that reduces 50% of the biofilm) value as compared with CHD. Taking into account all these data and considering the absence of genotoxic and cytotoxic activity under the tested conditions, it is suggested that KAMg is a natural product to be considered as active ingredient in oral care products.
Oleoresins from Copaifera species are extensively used in folk medicine in Brazil, which are employed mainly in the production of cosmetic formulations in Brazil, North America and Europe. Considering the lack of validated analytical methods for the analyses of diterpenes in Copaifera oleoresins, it was developed a validated and reliable reversed-phase high-performance liquid chromatography with photodiode array detection (RP-HPLC-PDA) method for the analysis of six diterpenes, including: (-)-polyalthic acid; (13E)-ent-labda-7, 13-dien-15-oic acid; ent-8(17)-labden-15,18-dioic acid; (-)-copalic acid; (-)-3β-acetoxycopalic acid and (-)-3β-hydroxycopalic acid. These compounds were isolated from C. duckei, C. reticulata and C. multijuga oleoresins by chromatographic means. The analytical curves were linear with regression coefficients (r 2 ) between 0.9903 and 0.9999. The limits of detection (LOD) and quantification (LOQ) values were 0.35 to 3.09 µg mL -1 and 1.05 to 9.36 µg mL -1, respectively. The method also displayed good precision and accuracy. The developed analytical method is reliable and a useful tool for the analysis of Copaifera oleoresin and its products.Keywords: Copaifera spp., oleoresins, diterpenes, RP-HPLC-PDA IntroductionThe Copaifera genus (Leguminoseae) consists of approximately 72 species, from which 16 of them occur only in Brazil, mainly in Northern region in the states of Amazonas, Pará and Ceará.1,2 These trees are popularly known as "copaiba", "copaibeiras" or "pau d'óleo", and the oleoresins obtained from their trunks are extensively used in folk medicine due to their antiinflammatory, analgesic, wound healing, antimicrobial, antileishmanial and antitumoral properties.2,3 Such ethnopharmacological relevance has stimulated several researchers to investigate their biological activities, which corroborated their pharmacological potential. [4][5][6][7][8] In addition to their pharmaceutical properties, these balsams are also largely used as dietary supplement, employed in the production of flavoring agents, and extensively commercialized as crude oil in Brazil. Moreover, these natural products are exported to Europe and North America, to be used mainly in cosmetic formulations. 2,9 Despite the great relevance of these oleoresins for pharmaceutical and cosmetic industries, most of these commercial balsams have not been authenticated, and their chemical profile has not been well established, thus hindering their industrial and biomedical applications, as well as impairing the quality and economic value of such products. 9,10 Chemically, the oleoresins of copaiba are predominantly composed by a mixture of volatile and non-volatile compounds comprising mainly sesquiterpenes and acid diterpenes. Acid diterpenes stands out for a wide range of the biological properties reported for these oleoresins, such as: antimicrobial, antitumoral, antinociceptive and anti-inflammatory, among others. 3,4,6,[11][12][13][14][15] Despite this fact, most of the studies reporting the chemical identification and quan...
No abstract
Abstract. Squarisi IS, De Freitas KS, Lemes DC, Ccana-Ccapatinta GV, Mejia JAA, Bastos JK, Veneziani RCS, Ambrosio SR, Tavares DC. 2018. Evaluation of the antiproliferative activity of red propolis hydroalcoholic extract and its fractions obtained by partition. Biofarmasi J Nat Prod Biochem 18: 66-69. The present study aimed to evaluate the cytotoxicity of red propolis hydroalcoholic extract (RPHE) and its fractions obtained by partition, hexanes (HF), dichloromethane (DF), ethyl acetate (AF) and n-butanol (BF), on tumor and non-tumor cell lines. For this purpose, the XTT colorimetric assay was performed on human lung fibroblasts (GM07492A, non-tumor cell), breast adenocarcinoma (MCF-7), glioblastoma (U343) and cervix adenocarcinoma (HeLa) cells. The results showed that RPHE, HF and DF presented not only cytotoxic potential to all tumor cell lines but also to normal cell line, indicating selectivity absence. HF presented the lowest IC50 (half minimal inhibitory concentration; 33.8-133.3 µg/mL), with significant difference from those observed for RPHE (137.0-262.7 µg/mL). BF and AF revealed an IC50 which was higher than 1250 µg/mL in all cell lines. The results showed that red propolis has substances with antiproliferative activity, indicating that its hexanes fraction may have substances with antitumor potential.
INTRODUCTION: Red propolis is synthetized from exudates of Dalbergia ecastophyllum (L) Taub. and Symphonia globulifera L.f., presents isoflavones, guttiferone E, xanthochymol, and oblongifolin B and has anti-inflammatory, antioxidant, and antiproliferative activities. OBJECTIVES: This study aimed to evaluate the antigenotoxic and anticarcinogenic potential of red propolis hydroalcoholic extract (RPHE) in rodents. METHODS: The influence of RPHE in doxorubicin (DXR)-induced genotoxicity was investigated through the micronucleus test in Swiss mice. Blood samples were also collected to investigate oxidative stress, hepatotoxicity, and nephrotoxicity. Was investigated the influence of RPHE in 1,2-dimethylhydrazine (DMH)-induced aberrant crypt foci, as well as its influence in proliferating cell nuclear antigen (PCNA) and the cyclooxygenase-2 (COX-2) expression in colon of rats, by immunohistochemistry. RESULTS: The results showed that RPHE (48 mg/kg) reduced DXR-induced genotoxicity. Animals treated with DXR showed significantly lower GSH serum levels in comparison to the negative control. RPHE treatments did not attenuated significantly the DXR-induced GSH depletion. No difference was observed in cytotoxicity parameters of mice hematopoietic tissues between the treatment groups, as well as the biochemical parameters of hepatotoxicity and nephrotoxicity. RPHE (12 mg/kg) reduced the DMH-induced carcinogenicity and toxicity, as well as DMH-induced PCNA and COX-2 expression in colon tissue. CONCLUSION: Therefore, was observed that the RPHE has chemopreventive effect, associated to antiproliferative and anti-inflammatory activities.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.