Ricardo Andrade Furtado
@unifran.edu.br
Post Graduation
University of Franca
RESEARCH, TEACHING, or OTHER INTERESTS
Multidisciplinary, General Pharmacology, Toxicology and Pharmaceutics, Drug Discovery
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Nicole A. Luizari Stábile, Frederico Rocha de Oliveira, Ricardo Andrade Furtado, Carolina Barretto M.L. Felippe, Mariana Riboli Tavares, Paulo E.B. Martinelli, Carlos Eduardo Fonseca-Alves, Fabiana Ferreira de Souza, Martina Colombo, Gaia Cecilia Luvoni,et al.
Elsevier BV
Silvio Almeida-Junior, Kátia Roberta Prieto de Oliveira, Laís Prado Marques, João Guilherme Martins, Heloisa Ubeda, Mario Ferreira Conceição Santos, Marcela Aldrovani Rodrigues, Marcio Luís Andrade e Silva, Sérgio Ricardo Ambrósio, Jairo Kenupp Bastos,et al.
Elsevier BV
Ricardo Andrade Furtado, Samir A. Ross, Silvio de Almeida Junior, Rafael Paranhos de Mendonça, Cristiane Teixeira Vilhena Bernardes, Mauro Nogueira da Silva, Karina Furlani Zoccal, Lúcia Helena Faccioli, and Jairo Kenupp Bastos
Wiley
AbstractBackgroundKaurenol, a diterpene alcohol found in Copaifera langsdorffii Desf. (known as “copaiba”), is historically used in traditional medicine for inflammatory conditions.ObjectivesThis study aims to comprehensively assess the potential anti‐inflammatory and antinociceptive properties of kaurenol.MethodsTo this end, the following experiments were conducted to evaluated toxicity: locomotor performance and acute toxicity; nociception: acetic acid‐induced writhing and formalin‐induced antinociception; and anti‐inflammatory activity: carrageenan and dextran‐induced paw edema at 10, 20, and 40 mg/kg, and measurement of nitric oxide (NO), tumor necrosis factor alpha (TNF‐α), interleukin‐6 (IL‐6), and interleukin‐10 (IL‐10) in macrophages at 1, 3, and 9 μg/ml.ResultsKaurenol did not show significant locomotor changes, acute toxicity, and central analgesic activity in the first phase of formalin test at dosages tested. Kaurenol showed 53%, 64%, 64%, and 58% of inhibition in the acetic acid‐induced writhing, second phase of formalin test, carrageenan and dextran‐induced paw edema, respectively.ConclusionThe anti‐inflammatory activity was associated with the regulation of NO release and probably with the regulation of mediators, such as serotonin and prostaglandin in vascular permeability, as well as by being associated with the regulation of IL‐6 and IL‐10. Kaurenol display anti‐inflammatory activity but has no analgesic activity.
Poliana Marques Pereira, Silvio de Almeida-Junior, Naomi Nalini de Melo Taveira, Eveline Maria de Melo, Mario Ferreira Conceição Santos, Lilian Cristina Gomes do Nascimento, Marcela Aldrovani Rodrigues, Jennyfer A. Aldana-Mejía, Marcio Luís Andrade e Silva, Sérgio Ricardo Ambrósio,et al.
Springer Science and Business Media LLC
Mariana B. Santiago, Vinicius Cristian O. dos Santos, Samuel C. Teixeira, Nagela B. S. Silva, Pollyanna F. de Oliveira, Saulo D. Ozelin, Ricardo A. Furtado, Denise C. Tavares, Sergio Ricardo Ambrósio, Rodrigo Cassio S. Veneziani,et al.
MDPI AG
This study aimed at evaluating the potential of Copaifera lucens, specifically its oleoresin (CLO), extract (CECL), and the compound ent-polyalthic acid (PA), in combating caries and toxoplasmosis, while also assessing its toxicity. The study involved multiple assessments, including determining the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) against cariogenic bacteria. CLO and PA exhibited MIC and MBC values ranging from 25 to 50 μg/mL, whereas CECL showed values equal to or exceeding 400 μg/mL. PA also displayed antibiofilm activity with minimum inhibitory concentration of biofilm (MICB50) values spanning from 62.5 to 1000 μg/mL. Moreover, PA effectively hindered the intracellular proliferation of Toxoplasma gondii at 64 μg/mL, even after 24 h without treatment. Toxicological evaluations included in vitro tests on V79 cells, where concentrations ranged from 78.1 to 1250 μg/mL of PA reduced colony formation. Additionally, using the Caenorhabditis elegans model, the lethal concentration (LC50) of PA was determined as 1000 μg/mL after 48 h of incubation. Notably, no significant differences in micronucleus induction and the NDI were observed in cultures treated with 10, 20, or 40 μg/mL of CLO. These findings underscore the safety profile of CLO and PA, highlighting their potential as alternative treatments for caries and toxoplasmosis.
Silvio de Almeida‐Junior, Matheus Vitor Ferreira Ferraz, Alex Roberto de Oliveira, Fabíola Pansani Maniglia, Jairo Kenupp Bastos, and Ricardo Andrade Furtado
Wiley
AbstractPropolis is a natural resinous product collected from different parts of plants by bees and mixed with their salivary secretions. The occurrence of more than 180 different chemotypes has flavonoids, phenolic acids, esters, and phenolic aldehydes, as well as balsamic resins, beeswax, pollen, and essential and aromatic oils, among others. Its biological potential documented throughout the world justifies the need, from time to time, to organize reviews on the subject, with the intention of gathering and informing about the update on propolis. In this review (CRD42020212971), phytochemical advances, in vitro, in vivo, and clinical biological assays of pharmacological interest are showcased. The focus of this work is to present propolis clinical safety assays, antitumor, analgesic, antioxidant, anti‐inflammatory, and antimicrobial activities. This literature review highlights propolis' promising biological activity, as it also suggests that studies associating propolis with nanotechnology should be further explored for enhanced bioprocessing applications.
Fransergio F. dos Santos, Raquel P. Morais‐Urano, Wilson R. Cunha, Samarah G. de Almeida, Pedro Sandoval dos Santos R. Cavallari, Hallana A. Manuquian, Henrique de A. Pereira, Ricardo Furtado, Mario F. C. Santos, and Márcio L. Amdrade e Silva
Hindawi Limited
Humanity has used propolis since ancient times, and its use as a food supplement has significantly increased. Several reports on propolis´ biological activity and toxicity have highlighted its anti-inflammatory properties, unlike many natural food supplements. This review addresses the anti-inflammatory roles of Brazilian green, brown, and red propolis produced by Apis mellifera, their extracts, isolated compounds, and their mode of action. Despite advances in anti-inflammatory therapies, the development of inflammatory processes in several diseases has been a concern for centuries. Demands for new anti-inflammatory drugs have led to studies on propolis products as diet components to treat and prevent inflammatory disorders. Brazilian green, brown, and red propolis are alternatives for obtaining extracts and compounds of valuable anti-inflammatory properties. PRACTICAL APPLICATIONS: Currently, propolis is a food supplement, and to the best of our knowledge, several studies have shown that despite advances in anti-inflammatory therapies, the inflammatory process continues to be a significant concern. However, due to the demand for new anti-inflammatory drugs, propolis products as dietary components can be used to treat and prevent inflammatory disorders.
C. T. V. Bernardes, V. P. Ribeiro, T. C. Carvalho, R. A. Furtado, N. A. Jacometti Cardoso Furtado, and J. K. Bastos
Letters in Applied Microbiology Wiley
The concern regarding the harm caused by biocides to human health has been increasing over the years, making the natural products an alternative to less toxic and more efficient biocides. Therefore, this paper reports the investigation of the disinfectant potential of extracts and isolated compounds from Baccharis dracunculifolia. For this purpose, extracts of aerial parts (BD-C), tricomial wash (BD-L) and roots (BD-R) of B. dracunculifolia were obtained by maceration. The extracts were submitted to different chromatographic techniques, including high-speedy countercurrent chromatography (HSCCC) furnishing nine isolated compounds. The extracts and isolated compounds were evaluated regarding their antimicrobial activity by the broth microdilution method, according to the Clinical and Laboratory Standards Institute, and regarding their sanitizing activity according to Standard Operating Procedure No. 65.3210.007 (INCQS, 2011), developed by the National Institute for Quality Control in Health (INCQS) - Oswaldo Cruz Foundation (FIOCRUZ). In the antimicrobial evaluation the BD-C extract showed minimum inhibitory concentration (MIC) values of 200 and 100 µg/mL against S. aureus and T. mentagrophytes, respectively. BD-L extract showed MIC value of 200 µg/mL against S. aureus. The isolated compounds caffeic acid (MBC 2.22 µM), ferulic acid (MBC 2.06 µM) and baccharin (MBC 0.27 µM) showed significant inhibitory activity against S. aureus. All B. dracunculifolia isolated compounds were active with exception of aromadrendin-4´-O-methyl-ether for T. mentagrophytes. Additionally, isosakuranetin was active against S. choleraesuis (MIC 1.4 µM). Regarding the sanitizing activity, the hydroalcoholic solution containing 0.2% of B. dracunculifolia extract in 40 ºGL ethanol was effective in eliminating the microbial contamination on all carrier cylinders and against all microorganisms evaluated in the recommended exposure time of 10 min. Therefore, B. dracunculifolia has potential for the development of sanitizing agents to be used in hospitals, food manufactures and homes.
Ricardo Andrade Furtado, Saulo Duarte Ozelin, Natália Helen Ferreira, Bárbara Ayumi Miura, Silvio Almeida Junior, Geórgia Modé Magalhães, Eduardo José Nassar, Mariza Abreu Miranda, Jairo Kenupp Bastos, and Denise Crispim Tavares
Journal of Toxicology and Environmental Health - Part A: Current Issues Informa UK Limited
ABSTRACT Melanoma is the most aggressive type of skin cancer, and thus it is important to develop new drugs for its treatment. The present study aimed to examine the antitumor effects of solamargine a major alkaloid heteroside present in Solanum lycocarpum fruit. In addition solamargine was incorporated into nanoparticles (NP) of yttrium vanadate functionalized with 3-chloropropyltrimethoxysilane (YVO4:Eu3+:CPTES:SM) to determine antitumor activity. The anti-melanoma assessment was performed using a syngeneic mouse melanoma model B16F10 cell line. In addition, systemic toxicity, nephrotoxic, and genotoxic parameters were assessed. Solamargine, at doses of 5 or 10 mg/kg/day administered subcutaneously to male C57BL/6 mice for 5 days, decreased tumor size and frequency of mitoses in tumor tissue, indicative of a decrease in cell proliferation. Treatments with YVO4:Eu3+:CPTES:SM significantly reduced the number of mitoses in tumor tissue, associated with no change in tumor size. There were no apparent signs of systemic toxicity, nephrotoxicity, and genotoxicity initiated by treatments either with solamargine alone or plant alkaloid incorporated into NP. The animals treated with YVO4:Eu3+:CPTES:SM exhibited significant increase in spleen weight accompanied by no apparent histological changes in all tissues examined. In addition, animals treated with solamargine (10 mg/kg/day) and YVO4:Eu3+:CPTES:SM demonstrated significant reduction in hepatic DNA damage which was induced by tumor growth. Therefore, data suggest that solamargine may be considered a promising candidate in cancer therapy with no apparent toxic effects.
Roberta Cristina Ribeiro Cruz, Francisco Rinaldi Neto, Ricardo Andrade Furtado, Larissa Mendes Souza, Fernanda Diniz de Sousa, Saulo Duarte Ozelin, Jairo Kenupp Bastos, Geórgia Modé Magalhães, Denise Crispim Tavares, and Pollyanna Francielli de Oliveira
Informa UK Limited
Abstract An alternative to reduce the undesirable effects of antineoplastic agents has been the combination of classical treatments with nutritional strategies aimed at reducing systemic toxicity without decreasing the antitumor activity of already used drugs. Within this context, this study evaluated the possible reduction of toxicity when cisplatin treatment is combined with watermelon pulp juice supplementation in C57BL/6 mice with melanoma. Watermelon is a fruit rich in vitamins, minerals, proteins, lycopene, carotene, and xanthophylls, which has shown effectiveness in the treatment of cardiovascular diseases, weight loss, urinary infections, gout, hypertension, and mutagenicity. The following parameters were analyzed: animal survival, bone marrow genotoxicity, serum creatinine and urea, histopathological features of the tumor tissue, tumor weight and volume, and weight of non-tumor tissues (kidney, liver, spleen, heart, and lung). The results showed that watermelon had no antitumor effect but reduced the toxicity of cisplatin, as demonstrated by an increase in the number of bone marrow cells and a decrease in serum creatinine and urea levels. The data suggest that watermelon pulp juice can be an alternative for reducing the side effects of antineoplastic agents.
Arthur B. Ribeiro, Saulo D. Ozelin, Lucas H. D. da Silva, Francisco Rinaldi‐Neto, Karoline S. Freitas, Heloiza D. Nicolella, Larissa D. R. de Souza, Ricardo A. Furtado, Wilson Roberto Cunha, and Denise C. Tavares
Wiley
AbstractAsiatic acid (AA) is a triterpene with promising pharmacological activity. In the present study, in vitro and in vivo assays were conducted to understand the effect of AA on cell proliferation and genomic instability. AA was cytotoxic to human tumor cell lines (M059J, HeLa, and MCF‐7), with IC50values ranging from 13.91 to 111.72 µM. In the case of M059J, AA exhibited selective cytotoxicity after 48 h of treatment (IC50 = 24 µM), decreasing the percentage of cells in the G0/G1 phase, increasing the percentage of cells in the S phase, and inducing apoptosis. A significant increase in chromosomal damage was observed in V79 cell cultures treated with AA (40 µM), revealing genotoxic activity. In contrast, low concentrations (5, 10, and 20 µM) of AA significantly reduced the frequencies of micronuclei induced by the mutagens doxorubicin (DXR), methyl methanesulfonate, and hydrogen peroxide. A reduction of DXR‐induced intracellular free radicals was found in V79 cells treated with AA (10 µM). The antigenotoxic effect of AA (30 mg/kg) was also observed against DXR‐induced chromosomal damage in Swiss mice. Significant reductions in p53 levels were verified in the liver tissue of these animals. Taken together, the data indicate that AA exerted antiproliferative activity in M059J tumor cells, which is probably related to the induction of DNA damage, leading to cell cycle arrest and apoptosis. Additionally, low concentrations of AA exhibited antigenotoxic effects and its antioxidant activity may be responsible, at least in part, for chemoprevention.
F. Dias, L. Pereira, R. Furtado, G. Magalhães, M. P. Miguel, L. Dias, A. T. Jorge, C. S. Honsho, S. Ambrósio, J. Bastos,et al.
Objective Evaluation of the healing and toxicological effects of Copaifera duckei Dwyer oleoresin (CDO). Materials and methods Rodents with skin lesions were divided into nine groups, including daily treatments with 1, 3 and 10% CDO, collagenase, antibiotic ointment and control groups, for 14 days. Results Treatment with 10% CDO reduced skin edema and hyperplasia, demonstrating anti-inflammatory effect of the oil. Reduction in the wound area was observed, indicating the healing effect of CDO. Histopathological analysis showed increases in angiogenesis and re-epithelialization in animals treated with the highest concentration. On the other hand, no alterations in ulcerations, inflammatory infiltrate, hemorrhage, congestion, degeneration, percentage of collagen fibers, number of cells stained with anti-macrophage migration inhibitory factor, or density of area stained with anti-collagen I and III were found. Toxicogenetic analysis revealed no differences in micronucleus frequencies or in the ratio of polychromatic erythrocytes to total erythrocytes between treated and negative control, demonstrating the absence of genotoxicity and cytotoxicity, respectively. There was no difference in levels of liver enzymes among groups, indicating the absence of hepatotoxicity. Conclusion Formulations of CDO exerted beneficial effects on the stages of cutaneous wound healing and are promising options for the treatment of wounds.
Heloiza Diniz Nicolella, Gabriela Fernandes, Saulo Duarte Ozelin, Francisco Rinaldi-Neto, Arthur Barcelos Ribeiro, Ricardo Andrade Furtado, Juliana Marques Senedese, Tábata Rodrigues Esperandim, Rodrigo Cassio Sola Veneziani, and Denise Crispim Tavares
Oxford University Press (OUP)
Abstract The present study aimed to evaluate the effect of the manool diterpene on genomic integrity. For this purpose, we evaluated the influence of manool on genotoxicity induced by mutagens with different mechanisms of action, as well as on colon carcinogenesis. The results showed that manool (0.5 and 1.0 µg/ml) significantly reduced the frequency of micronuclei induced by doxorubicin (DXR) and hydrogen peroxide in V79 cells but did not influence genotoxicity induced by etoposide. Mice receiving manool (1.25 mg/kg) exhibited a significant reduction (79.5%) in DXR-induced chromosomal damage. The higher doses of manool (5.0 and 20 mg/kg) did not influence the genotoxicity induced by DXR. The anticarcinogenic effect of manool (0.3125, 1.25 and 5.0 mg/kg) was also observed against preneoplastic lesions chemically induced in rat colon. A gradual increase in manool doses did not cause a proportional reduction of preneoplastic lesions, thus demonstrating the absence of a dose–response relationship. The analysis of serum biochemical indicators revealed the absence of hepatotoxicity and nephrotoxicity of treatments. To explore the chemopreventive mechanisms of manool via anti-inflammatory pathways, we evaluated its effect on nitric oxide (NO) production and on the expression of the NF-kB gene. At the highest concentration tested (4 μg/ml), manool significantly increased NO production when compared to the negative control. On the other hand, in the prophylactic treatment model, manool (0.5 and 1.0 μg/ml) was able to significantly reduce NO levels produced by macrophages stimulated with lipopolysaccharide. Analysis of NF-kB in hepatic and renal tissues of mice treated with manool and DXR revealed that the mutagen was unable to stimulate expression of the gene. In conclusion, manool possesses antigenotoxic and anticarcinogenic effects and its anti-inflammatory potential might be related, at least in part, to its chemopreventive activity.
Silvio Almeida Junior, Poliana Marques Pereira, Vanessa de Souza Tótoli, Edna Sousa Neves, Mayara Monochio, Alef Winter Oliveira Alvarenga, Juliana Issa Hori, Wilson Rodrigues Braz, Lucas Alonso Rocha, Eduardo José Nassar,et al.
Elsevier BV
Leonardo G. Lopes, Larissa A. Csonka, Jessica A. Souza Castellane, Alef Winter Oliveira, Sílvio de Almeida-Júnior, Ricardo Andrade Furtado, Cibele Tararam, Larissa Ortolan Levy, Leandro Zuccolotto Crivellenti, Maria Luiza Moretti,et al.
Frontiers Media SA
Aspergillus and Fusarium cause a broad spectrum of infections in humans, mainly in immunocompromised patients. Among these, patients undergoing hemodialysis are highly susceptible to infections, requiring a constant and adequate environmental disinfection program. Nevertheless, monitoring the residual disinfectants can contribute to the morbidity and mortality reduction in these patients. Here, we evaluated the susceptibility of Aspergillus spp. (n=19) and Fusarium spp. (n=13) environmental isolates against disinfectants (acetic acid, citric acid, peracetic acid, sodium hypochlorite, and sodium metabisulphite) at different concentrations and time exposures. Also, we investigated the in vivo toxicity of the peracetic acid residual concentration in mice. Fusarium isolates were identified by F. equiseti, F. oxysporum and F. solani while Aspergillus presented clinically relevant species (A. fumigatus, A. niger and A. terreus) and environmental ones. Against planktonic cells, only two disinfectants (acetic acid and sodium hypochlorite) showed a fungicidal effect on Fusarium spp., while only one (sodium hypochlorite) was effective against Aspergillus spp. Both fungi formed robust in vitro biofilms with large amounts of the extracellular matrix, as evidenced by electron micrographs. Exposure of fungal biofilms to disinfectants showed sensitivity to three (acetic, citric, and peracetic acids), although the concentrations and times of exposure varied according to the fungal genus. Mice exposure to the residual dose of peracetic acid during 60 weeks showed anatomopathological, hematological, and biochemical changes. The implementation of news control measures and those that already exist can help reduce infections, the second cause of death and morbidity in these patients, besides providing safety and well-being to them, a priority of any quality health program.
Pollyanna Francielli De Oliveira, Luis Fernando Leandro, Ricardo Andrade Furtado, Natália Helen Ferreira, Patrícia Mendonça Pauletti, Alba Regina Barbosa Araújo, Sérgio Akira Uyemura, and Denise Crispim Tavares
Journal of Toxicology and Environmental Health - Part A: Current Issues Informa UK Limited
Styrax camporum Pohl, a typical species from the Brazilian cerrado, commonly known as "benjoeiro", is used to treat gastroduodenal diseases. In previous studies carried out by our research group, hydroalcoholic extract of S. camporum stems (SCHE) exhibited antigenotoxic and antiproliferative effects. For a comparative analysis of the chemopreventive effect of SCHE, the aim of this study was to investigate the influence of SCHE against carcinogen 1,2-dimethylhydrazine (DMH)-induced DNA damage and pre-neoplastic lesions in Wistar rat colon. Animals were treated orally with SCHE at 250, 500 or 1000 mg/kg body weight in conjunction with a subcutaneous injection of DMH. DNA damage was assessed using the comet assay while tpre-neoplastic lesions by aberrant crypt foci (ACF) assay. The following hepatic oxidative stress markers were determined including activities of catalase (CAT) and glutathione S-transferase (GST) as well as levels of reduced glutathione (GSH) and malondialdehyde (MDA). Treatment with SCHE was not genotoxic or carcinogenic at the highest dose tested (1000 mg/kg b.w.). The extract effectively inhibited DNA damage and pre-neoplastic lesions induced by DMH administration at all concentrations tested. Measurement of CAT, and GST activities and levels of GSH showed that SCHE did not reduce oxidative processes. In contrast, treatment with SCHE (1000 mg/kg b.w.) decreased liver MDA levels. Taken together, these findings suggested the chemopreventive effect attributed to SCHE in colon carcinogenesis, may be related to its capacity to inhibit DNA damage as well as an antioxidant action associated with its chemical constituents egonol and homoegonol.
Larissa A. Oliveira, Heloiza D. Nicolella, Ricardo A. Furtado, Nerilson M. Lima, Denise C. Tavares, Taís A. Corrêa, and Mauro V. Almeida
Springer Science and Business Media LLC
C. C. F. Alves, J. D. Oliveira, E. B. B. Estevam, M. N. Xavier, H. D. Nicolella, R. A. Furtado, D. C. Tavares, and M. L. D. Miranda
FapUNIFESP (SciELO)
Abstract Essential oils, which may be extracted from several parts of plants, have different biological activities. The Brazilian Cerrado has a large variety of plants that yield essential oils, even though many have not been studied yet. Taking into account the biodiversity of this biome, this study aimed at evaluating the antiproliferative activity of essential oils extracted from three species of plants of the Cerrado in Goiás state: Campomanesia adamantium (Cambess.) O. Berg, Protium ovatum (Engl. in Mart.) and Cardiopetalum calophyllum (Schltdl.). Essential oils were extracted from both C. adamantium and C. calophyllum leaves and from P. ovatum leaves and green fruits by hydrodistillation carried out by a Clevenger-type apparatus. The chemical composition of the essential oils was determined by Gas Chromatography coupled to Mass Spectrometry (GC-MS). The following major chemical constituents were identified in the essential oils under investigation: β-myrcene (62.00%), spathulenol (28.78%), germacrene-B (18.27%), β-caryophyllene oxide (16.40%), β-caryophyllene (14.00%), α-pinene (11.30%), viridiflorol (9.99%), limonene (7.30%) and (Z,E)-pharnesol (6.51%). The antiproliferative activity was evaluated in different human tumor cell lines: breast adenocarcinoma (MCF-7), cervical adenocarcinoma (HeLa) and glioblastoma (M059J). A normal human cell line was included (GM07492A, lung fibroblasts). Results showed that essential oils from C. adamantium leaves got the lowest values of IC50 in all strains of tumor cells under evaluation. They were significantly lower than the ones of the normal cell line, an evidence of selectivity. It is worth mentioning that this is the first report of the antiproliferative activity of essential oils from C. adamantium , P. ovatum and C. calophyllum against human tumor cells.
Camila Bertanha, Valéria Gimenez, Ricardo Furtado, Denise Tavares, Wilson Cunha, Márcio Andrade e Silva, Ana Januario, Alexandre Borges, Daniel Kawano, Renato Parreira,et al.
Sociedade Brasileira de Quimica (SBQ)
Lipoxygenase (LOX) plays an important role in inflammatory processes and Arrabidaea brachypoda (DC.) Bureau (Bignoniaceae) has been described as presenting antiinflammatory activity. Therefore, the objective of this study was to develop a high-performance liquid chromatography (HPLC) procedure to directly recognize LOX inhibitor compounds in A. brachypoda crude extract, facilitating the isolation, characterization of bioactive compounds, evaluation of natural compounds using an in vitro 15-LOX assay and prediction of the most probable binding modes of their main constituent through molecular docking simulations. The chemical analysis was performed by ethanol crude extract microfractionation using HPLC-DAD (diode array detector) associated to a fraction collector. The bioactive chromatogram displayed a peak with 50.9% LOX inhibition at 13.6 min retention time. The extract was purified and conandroside was isolated, presenting a LOX inhibitory activity with an inhibitory concentration (IC50) of 7.8 ± 1.1 μM, close to standard quercetin (IC50 7.6 ± 0.3 μM). Additionally, conandroside was not cytotoxic to normal cells (GM07492A). The LOX-conandroside complex displayed a slightly higher docking score (92.7) than quercetin (71.5). These results together suggest that conandroside could be explored as lipoxygenase inhibitor.
E. A. J. Silva, E. B. B. Estevam, T. S. Silva, H. D. Nicolella, R. A. Furtado, C. C. F. Alves, E. L. Souchie, C. H. G. Martins, D. C. Tavares, L. C. A. Barbosa,et al.
FapUNIFESP (SciELO)
Abstract This study evaluated the antibacterial and antiproliferative activities of the essential oil of Psidium guajava leaves (PG-EO), traditionally used in folk medicine. The essential oil was obtained from fresh leaves by hydrodistillation, using a modified Clevenger apparatus. The major PG-EO chemical constituents were identified by GC-MS and GC-FID as being β-caryophyllene (16.1%), α-humulene (11.9%), aromadendrene oxide (14.7%), δ-selinene (13.6%), and selin-11-en-4α-ol (12.5%). The antibacterial activity of the essential oil of P. guajava leaves was determined in terms of its minimum inhibitory concentrations (MIC) using the broth microdilution method in 96-well microplates. PG-EO had moderate activity against Streptococcus mutans (MIC = 200 µg/mL), S. mitis (MIC = 200 µg/mL), S. sanguinis (MIC = 400 µg/mL), S. sobrinus (MIC = 100 µg/mL), and S. salivarius (MIC = 200 µg/mL). The antiproliferative activity was evaluated against different tumor cell lines: breast adenocarcinoma (MCF-7), human cervical adenocarcinoma (HeLa), and human gliobastoma (M059J). A normal human cell line (GM07492A, lung fibroblasts) was included. The antiproliferative activity was evaluated using the XTT assay and the results were expressed as IC50. The essential oil showed significantly lower IC50 values against MCF-7 and M059J lines than that obtained for the normal line, showing selectivity. Our results suggest that the essential oil of Psidium guajava L. has promising biological activities and can be considered a new source of bioactive compounds.
Alline L. B. Dias, Hellen R. F. Batista, Elisângela B. B. Estevam, Cassia C. F. Alves, Moacir R. Forim, Heloiza D. Nicolella, Ricardo A. Furtado, Denise C. Tavares, Thayna S. Silva, Carlos H. G. Martins,et al.
Informa UK Limited
Abstract In this study, the chemical composition and antibacterial and antiproliferative potential of the essential oil obtained from fresh leaves of Psidium myrtoides (PM-EO) against oral pathogens and human tumour cell lines were investigated for the first time. GC-FID and GC-MS analyses showed that trans-β-caryophyllene (30.9%), α-humulene (15.9%), α-copaene (7.8%), caryophyllene oxide (7.3%) and α-bisabolol (5.3%) are the major constituents of PM-EO. The antibacterial activity of PM-EO against a panel of oral pathogens was investigated in terms of their minimal inhibitory concentrations (MIC) using the broth microdilution method. PM-EO displayed moderate activity against Streptococcus mitis (MIC = 100 μg/mL), S. sanguinis (MIC = 100 μg/mL), S. sobrinus (MIC = 250 μg/mL), and S. salivarius (MIC = 250 μg/mL), and strong activity against S. mutans (MIC = 62.5 μg/mL). The antiproliferative activity in normal (GM07492A, lung fibroblasts) and tumour cell lines (MCF-7, HeLa, and M059 J) was performed using the XTT assay. PM-EO showed 50% inhibition of normal cell growth at 359.8 ± 6.3 μg/mL. Antiproliferative activity was observed against human tumour cell lines, with IC50 values significantly lower than that obtained for the normal cell line, demonstrating IC50 values for MCF-7 cells (254.5 ± 1.6 μg/mL), HeLa cells (324.2 ± 41.4 μg/mL) and M059 J cells (289.3 ± 10.9 μg/mL). Therefore, the cytotoxicity of PM-EO had little influence on the antibacterial effect, since it showed antibacterial activity at lower concentrations. Our results suggest that PM-EO is a promising source of new antibacterial and antitumour agents.
Nayane Moreira Machado, Arthur Barcelos Ribeiro, Heloiza Diniz Nicolella, Saulo Duarte Ozelin, Lucas Henrique Domingos Da Silva, Ana Paula Prado Guissone, Francisco Rinaldi-Neto, Igor Lizo Limonti Lemos, Ricardo Andrade Furtado, Wilson Roberto Cunha,et al.
Informa UK Limited
ABSTRACT Usnic acid (UA) is one of the pharmacologically most important compounds produced by several lichen species. To better understand the mechanism of action (MOA) of this important substance, this study examined the genotoxicity attributed to UA and its influence on mutagens with varying MOA using the micronucleus (MN) test in Chinese hamster ovary cells (CHO). Additional experiments were conducted to investigate the effect of UA on colon carcinogenesis in Wistar rats employing the aberrant crypt focus (ACF) assay. In vitro studies showed a significant increase in the frequency of MN in cultures treated with the highest UA concentration tested (87.13 µM). In contrast, UA concentrations of 10.89, 21.78, or 43.56 µM produced an approximate 60% reduction in chromosomal damage induced by doxorubicin, hydrogen peroxide, and etoposide, indicating an antigenotoxic effect. In the ACF assay, male Wistar rats treated with different UA doses (3.125, 12.5, or 50 mg/kg b.w.) and with the carcinogen 1,2-dimethylhydrazine exhibited a significantly lower incidence of neoplastic lesions in the colon than animals treated only with the carcinogen. Data suggest that the MOA responsible for the chemopreventive effect of UA may be related to interaction with DNA topoisomerase II and/or the antioxidant potential of the compound.
Juliana Marques Senedese, Francisco Rinaldi-Neto, Ricardo Andrade Furtado, Heloiza Diniz Nicollela, Larissa Daniela Ribeiro de Souza, Arthur Barcelos Ribeiro, Lucas Souza Ferreira, Geórgia Modé Magalhães, Iracilda Zeppone Carlos, Jonas Joaquim Mangabeira da Silva,et al.
Elsevier BV
Fernanda Gosuen Gonçalves Dias, Brenda Martins Cristino, Claudianara Ávila Silva, Larissa Fernandes Magalhães, Cristiane dos Santos Honsho, Ricardo Andrade Furtado, Tais Harumi de Castro Sasahara, Lucas de Freitas Pereira, and Adriana Torrecilhas Jorge
PPUFU - Portal de Periódicos da Universidade Federal de Uberlândia
The tear lipid layer (oily outer layer) reduces evaporation and prevents tear overflow. In dogs, reductions in the lipid components of this layer (cholesterol, triglycerides and phospholipids) can cause eye serious diseases. In this way, the tear crystallization test analyzes the lacrimal quality, however, it is less used in veterinary. As phytosterol reduces blood cholesterol, the objective of this study was to investigate, through the tear crystallization test, whether the systemic administration of this drug influences the lacrimal quality of healthy dogs and, in addition, to verify differences in the interpretation of the ophthalmic test between different evaluators. Eight beagles, healthy, of both sexes, young and adults, without clinical ophthalmic signs apparent were selected. Basal lacrimal samples (D0) were collected from the right and left eye of all animals with glass capillary tube and arranged on a glass slide for scanning the images and subsequent microscopic analysis. Subsequently, all were medicated with the phytosterol (Collestra® 650 mg: 1 capsule, orally, every 12 hours, for 15 days). After seven (D7) and fifteen (D15) days of this systemic administration, the tear crystallization test in both eyes of all dogs was again performed for statistical comparison with the baseline results. The photographs of the slides were classified by four evaluators (AV1 and AV2 with professional experience in ophthalmology and AV3 and AV4 without previous professional experience in ophthalmology), following standards established by Rolando (1984). The results were statistically verified by analysis of simple variance (ANOVA One-Way). There was no statistical difference in the tear crystallization test between the established periods and in relation to the different ophthalmic test evaluators (p≤0.05). Although phytosterols reduce blood cholesterol levels, it was observed in the present study that these drugs when administered systemically did not interfere in the tear lipid layer and, consequently, in the lacrimal quality of healthy dogs, and may be prescribed as lipid-lowering agents for patients with ocular diseases, especially the lacrimal ones.
Natana A. M. de Jesus, Anna H. P. de Oliveira, Denise C. Tavares, Ricardo A. Furtado, Marcio L. A. de Silva, Wilson R. Cunha, and Eduardo F. Molina
Springer Science and Business Media LLC