Cytotoxic and Anti-inflammatory Properties of Two Medicinal Plant Recipes Decoctions, acphyx and chryfa, Used in Traditional Medicine of Burkina Faso

Aims: Cancer is a major public health problem worldwide and in Burkina Faso. This study aimed to evaluate the cytotoxic and anti-inflammatory properties of ACPHYX and CHRYFA, two medicinal plant recipes used against inflammatory diseases in traditional medicine in Burkina Faso. Study Design: The anti-inflammatory and anti-proliferative activity on prostate and cervical cancer cells of a recipe orients on its possible anti-cancer properties. Then would help to realize ethnopharmacological evidence study for its validation or not as a phytomedicine against prostate or cervical cancer. Place and Duration of Study: The studies were carried out in the laboratories of the Pietro Anignoni Biomolecular Research Center (CERBA) and the Health Sciences Research Institute (IRSS/CNRST) from December 2021 to March 2023 in Burkina Faso. Methodology: An aqueous decoction of ACPHYX recipe and CHRYFA recipe, were made. The phytochemical groups of interest and the phenolic compound content of the extracts were determined. The antioxidant test was performed by the DPPH and FRAP methods. The cytotoxic activity on cancer cells was evaluated by the MTT test. Anti-inflammatory activity was assessed by pro-inflammatory enzyme inhibition tests (15-lipoxygenase, cyclooxygenases), anti-edema and antihistamine tests. Results: ACPHYX decoction showed the best antioxidant activity by DPPH method (IC50 of 12.80 ± 0.5?g/mL). The chelation capacity evaluated by FRAP method was also better with ACPHYX decoction (1.94 ± 0.296 mmol EAA/g). ACPHYX decoction also showed the best cytotoxic activity on prostate cancer DU145 cells (175.5 ± 3.79 ?g/mL) and cervical cancer HeLa cells (302.5 ± 64.36 ?g/mL). In vitro, the extracts inhibited 60% edema at 400 mg/kg dose and 79.32% scratching inhibition at 600 mg/kg dose. Conclusion: The strongest anti-inflammatory activity in vitro and in vivo was observed with ACPHYX extract. ACPHYX recipe compared to CHRYFA showed better cytotoxic and anti-inflammatory properties. Its use could help to treat tumor and inflammatory conditions through further studies.

New bisnorsesquiterpene from Glottiphyllum linguiforme and its antimicrobial, cytotoxic, and antioxidant activities

Natural product research is a cornerstone in the drug discovery process. Many inspiring chemical moieties with new skeletons and potent biological activity are commonly reported from natural sources. Chromatographic examination of the alcoholic extract of Glottiphyllum linguiforme aerial furnished four compounds, including ?-sitosterol (1), ?-sitosterol-3-O-?-D-glucopyranoside (2), and 1,1? biuracil (3), and a new compound, tectoionyl A 3-O-sodium sulfate (4). The new structure was elucidated using high-resolution mass and intensive 1D and 2D NMR spectroscopic analyses. Quantitative analysis of G. linguiforme extract revealed considerable contents of total phenolic and total flavonoid. A DPPH antioxidant assay indicated moderate activity (0.026 mg acid equivalent antioxidant capacity/g dry extract). Antimicrobial activity testing of the pure compounds indicated noticeable antibacterial activity of compound 2 against Escherichia coli, Salmonella enterica, and Pseudomonas aeruginosa. In addition, compounds 1–4 displayed mild cytotoxic effects against human breast adenocarcinoma (MCF7) and hepatocellular carcinoma (HepG2) cell lines, and the normal (Vero) cells at the tested concentration (100 ?g/ml), as compared to the standard cytotoxic drug, doxorubicin. This study is the first to estimate phenolics and flavonoid contents, discover constituents by phytochemical isolation, and examine cytotoxicity and antimicrobial properties of G. linguiforme. The unusual nitrogenous compound 1,1?-biuracil (3) and the sulfate derivative (4) may evidence chemotaxonomic importance.

Anticancer activity of Celtis tournefortii Lam. against human liver cancer cells

Celtis tournefortii Lam. (Celtis aetnensis) is a species of plant with extraordinary bioactivities that has received little research and documentation. Its potential to treat human liver cancer has not yet been studied. Therefore, the bark extract was tested in vitro against human hepatocellular carcinoma (HepG2) cells in the current investigation. The extract was found to increase the Reactive Oxygen Species (ROS) levels in tumor cells, causing cytotoxicity. In addition, the lactate dehydrogenase level was found to be elevated, indicating cellular damage. The likelihood that C. tournefortii Lam. will target the AKT protein is suggested by a considerable drop in the expression of the AKT gene. This is the first report on the effectiveness of C. tournefortii Lam. against liver cancer reported thus far. Our results suggest the presence of promising therapeutic compounds in the bark of C. tournefortii Lam.

In-vitro Anticancer and In silico Assessment of Oxalis corniculata Against Colorectal Cancer (HCT 116) Cell line

Colorectal cancer is the third most frequently diagnosed cancer in both genders and the fourth foremost cause in respect to cancer-associated mortality. The metastasis mechanism of colorectal cancer shows that it gradually developed in the form of polyps under granular cells in the large intestine, which damages blood and lymph vessels. At present, chemotherapy and surgery are the major clinical approaches in treatment. Therefore, developing novel and effective drugs are requiring use of natural derivative compounds, a potent and significant effect in restricting the progression of colorectal cancer (CRC). The present research investigates the in vitro anticancer properties of various extracts of plant Oxalis corniculata counter cell viability of CRC cell line (HCT116) using an MTT assay. In silico docking studies of hexadecanoic acid were performed with cytochrome P450CYP17A1 protein (3RUK) to predict potential inhibitors and druglikeness as potential CRC inhibitors using ADME profiling adhered to five rule of Lipinski. The finding indicated the extracts of the Oxalis corniculata have anticancer and anti-proliferative activity. The cell cytotoxic observed against chloroform extract exhibited the highest inhibition against the HCT116 cell line, following ethanol and aqueous extract. The determined IC50 values for the ethanol, aqueous, and chloroform extracts were 53.94±1.29 µg/ml, 61.85±0.43 µg/ml, and 47.34±1.24 µg/ml, respectively The in silico molecular docking result shows that n-hexadecanoic acid compound was found to be effective against 3RUK protein associated with CRC. Therefore, the finding suggests Oxalis corniculata plants could be used to formulate potential therapeutic drugs for the development of anticancer agents.

Anticancer activity of ex vitro established Achillea thracica Velen. water extracts

Ex situ conservation of Bulgarian endemic species Achillea thracica offers a chance for d?velopment of a new antitumor drug. The aim of this study was to evaluate the anticancer effects of water extracts of ex vitro established A. thracica grown in Bulgaria against fibrosarcoma cells. In our preliminary study, cytotoxicity of hot and cold water extracts was determined using Triticum root elongation test and Allium cepa assay. In vitro cytotoxicity and pro-apoptotic activity of hot extract (HE) were estimated using HT1080 cell line fibrosarcoma cells. Cytotoxicity was determined by the change in the cell number, the cell viability, and the cell population growth. Pro-apoptotic activity was assessed by the score of cell nuclei with morphological changes. The result of the root elongation test showed that the HEs exerted a stronger inhibitory effect in comparison with the cold extracts (CEs). Respectively, EC50 value of the hot water extract is 9.85 g/l and of the CE – 12.71 g/l. The extracts tested at concentration equal to ½ ??50 and EC50 values showed a significant mitodepressive effect on A. cepa meristematic cells. The in vitro tests revealed a significant negative impact on cancer cell viability and a promising pro-apoptotic activity of hot water extract.

Exploring the Wound Healing Potential of Tridax procumbens Extract: A Comprehensive Analysis through in vitro Cytotoxicity and Scratch Assay Studies

Background: Wound healing, a complex biological process, is crucial for preventing infections and maintaining skin integrity. This comprehensive review examines wound dynamics based on location, etiology, symptoms, and clinical appearance. Emphasizing the importance of precise progression through inflammation, cellular proliferation, and remodeling phases, the study highlights the risk of chronic wounds with delays or interruptions. Methods: This study explores natural alternatives to synthetic wound healing drugs, focusing on T. procumbens. Scientific investigations reveal its diverse pharmacological activities, particularly in ointment formulations. In vitro cytotoxicity and scratch tests, using the MTT test on Vero-E6 cell lines, demonstrate T. procumbens' potential for wound healing. The research aims to address the challenges posed by the side effects of synthetic drugs. Results: The research provides insights into skin tissue regeneration through T. procumbens, revealing its ability for wound healing. The cytotoxicity index is calculated after applying drug concentrations, and regression analysis yields the IC50, offering information on the effect on cell viability. Conclusion: Combining traditional wisdom with contemporary research, this study bridges the gap between technology and tradition, presenting a comprehensive method for wound management. T. procumbens emerges as a promising herbal treatment, with its potential demonstrated through diverse pharmacological activities and cellular reactions.

Solid-state fermentation of pigment producing endophytic fungus Fusarium solani from Madiwala lake and its toxicity studies

Several consumer products look enticing due to colors and there has been a demand for colours for various applications ever since human civilization started. Although in the primitive days, humans had used natural colours, the wake of the industrial revolution saw the excessive use of diverse types of synthetic colours. Although it looked very fancy initially, slowly scientists discovered the dangers of large-scale use of these colourants. The current demand is for natural colours, and hence, there is a scope for sources of natural colours from bio sources. The present study involved the isolation of an endophytic fungus, Fusarium solani producing a red pigment from the polluted waters of Madiwala lake in Bangalore. The fungal extract showed good antimicrobial and moderate antioxidant properties. Cytotoxicity assays using brine shrimps proved negligible toxicity which is a positive trait for natural colorants for safer applications in industries. Media optimization and solid-state fermentation were carried out to improve the yield of the fungal pigment and also to formulate a cheaper media for fungal multiplication and pigment production. Green synthesis of silver nanoparticles was also carried out with the fungal extract and the nanoparticles were characterized. Thus, the present study provides an option for the extraction of environment-friendly natural colorant from the fungus F. solani for potential industrial applications.

Ethnobotanical study of medicinal plants used for cancer treatment at the province of Nador, Morocco

Morocco has varied wealth of aromatic and medicinal plants (AMPs) which are commonly used for prevention and treatment of vario us diseases or as complementary therapy such for cancer diseases. An ethnobotanical study was carried out in the province of Nador, located northeast of Morocco. A total of 418 persons were interviewed, information about their profile, type of medicinal pl ants existing in this area, plant characteristics and uses of those existing plants. Results showed 35 species distributed in 23 families, the most represented were Lamiaceae (7), Apiaceae (5) and Fabaceae (3). This study revealed that the population mainl y used seeds (28%), leaves (26%), aerial parts (20%) and fruits (14%). Moreover, it has shown that Nerium oleander were used by the local population for cancer treatments. Biological activity of N. oleander showed an antimicrobial effect on Escherichia col i , Pseudomonas aeruginosa and Staphylococcus aureus

Marruecos tiene una riqueza vegetal muy variada de plantas aromáticas y medicinales (AMP) y se utilizan com únmente para la prevención y el tratamiento de diversas enfermedades o como terapia complementaria, como las enfermedades del cáncer. Se llevó a cabo un estudio etnobotánico en la provincia de Nador, situada al noreste de Marruecos. Se entrevistó a un tota l de 418 personas, información sobre su perfil, tipo de plantas medicinales existentes en esta zona, características de las plantas, usos de las plantas existentes, etc. Los resultados mostraron una alta riqueza de especies de 35 especies distribuidas en 2 3 familias, las más representadas fueron Lamiaceae (7), Apiaceae (5) y Fabaceae (3). Este estudio reveló que la población utilizó preferentemente semillas (28%), hojas (26%), partes aéreas (20%) y frutos (14%). Además, se ha demostrado que la población loc al utilizaba Nerium oleander para tratamientos contra el cáncer. La actividad biológica de N. oleander mostró un efecto antimicrobiano sobre Escherichia coli , Pseudomonas aeruginosa y Staphylococcus aureus

Assessment of the Phytochemical Composition, Antioxidant Activity, and In-vitro Cytotoxic Effects of Begonia malabarica on Pancreatic Cancer Cell Line

The study assesses the biological properties of methanolic extracts derived from the leaves, stems, and roots of Begonia malabarica, a native plant species in the mountainous area of southern India. The GC-MS was used to analyze the phytochemicals in the solvent from Begonia malabarica that had been extracted with methanol. The antioxidant activity was evaluated using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) method and as reference solution is ascorbic acid. The cytotoxicity activity was determined using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) approach. The GC-MS analysis effectively revealed 35 distinctive phytomolecules. The primary constituents, namely tert-butylbenzene (23%), 2-methylnaphthalene (6.2%), ethyl ester of octadecanoic acid (0.9%), and (Z,Z)-9,12-octadecadienoic acid (0.9%), are noted. The results, the methanolic extracts from B. malabarica are antioxidants that have significant levels (P < 0.05) of DPPH radical scavenging activities at different doses. The detected radical scavenging activities exhibited a higher proportion in the stem of B. malabarica. The IC50 values for the methanolic extracts were found to be 0.77 mg/ml, 0.49 mg/ml, and 0.68 mg/ml, respectively. The MTT analysis demonstrated that the methanolic extracts exhibited a considerable increase in cytotoxic activity against the pancreatic cancer (PANC-1) cell line, resulting in a cell viability percentage of 69.63% at a concentration of 31.25µg/ml. These findings confirm the possible biological effects of B. malabarica and its prospective use in different pharmaceutical pursuits in the future.

Characterisation and Cytotoxicity Analysis of Green Synthesised Silver Nanoparticles Using Fruit Peel Extract of Citrus pennivesiculata (Lush.) Tanaka

Silver nanoparticles were green synthesized using the aqueous extract of Citrus pennivesiculata (Lush.) Tanaka, J. fruit peel. The metallic silver was reduced to silver nanoparticles by the action of secondary metabolites in the fruit peel. The characterization of silver nanoparticles was done by UV-visible spectrophotometry, transmission electron microscopy (TEM), fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). UV-vis spectrophotometry of the silver nanoparticles showed an absorption peak at 435 nm. The TEM analysis showed that the spherical diameter of the particle ranged between 2 to 34 nm. The XRD analysis proved the crystalline nature of the synthesized silver nanoparticles. The FTIR analysis of the synthesized nanoparticles showed the presence of alcohols, phenols, aromatic esters, monosubstituted alkynes, disubstituted alkenes, sulfoxide, amino, and other functional groups. Cytotoxicity and anticancer activity of the green synthesized silver nanoparticles were determined using the mouse fibroblast cell line (L929) and human breast cancer cell line (MCF-7), respectively. The lethal concentration (LC50) of silver nanoparticles on the L929 cell line was found to be 48.521 ?g/mL, and that of the MCF-7 cell line was 21.625816 ?g/mL. The synthesized silver nanoparticles revealed cytotoxic activity in a dose-dependent manner. The conclusions drawn from this research could be beneficial for nanotechnology-based biomedical applications.

DETERMINATION OF IN VITRO CYTOTOXICITY OF ENTRECTINIB AND PEMIGATINIB NANOSPONGES TABLETS ON A 498, MCF-7 AND PANC-1 CELL LINES

Objective: The aim of this study was to improve the oral solubility of Pemigatinib and Entrectinib through incorporation into nanosponges (NSs), and further the cytotoxic potential of optimized formulations of NSs on A498, MCF-7, and PANC-1 cell lines in the MTT based Cell proliferation assay was analyzed.Methods: In the current study Pemigatinib and Entrectinib were formulated in to NS tablets and cytotoxicity was determined by using A498, MCF-7, and PANC-1 cell lines. The optimized NS formulation was determined prepared into a tablet dosage form, which further was evaluated for physical parameters and in vitro drug release study. For cytotoxicity studies, MTT assay was conducted for these formulations, IC50 values were calculated for the tested compound and compared with 5-Fluorouracil.Results: The optimized formulation was evaluated for physical parameters and in vitro drug release study, the results were satisfactory. The IC50 of Entrectinib NS, Pemigatinib NS and 5-Fluorouracil, against A498 cell line was 26.34, 85.24 and 15.24 µg/ml, respectively. The IC50 of Entrectinib NS, Pemigatinib NS and 5-Fluorouracil, against MCF-7 cell line was 71.54, 35.48 and 24.56 µg/ml, respectively. The IC50 of Entrectinib NS, Pemigatinib NS and 5-Fluorouracil, against PANC-1 cell line was 35.14, 22.54 and 22.54 µg/ml, respectively. It was observed that the IC50 of drug-loaded NS was higher than the comparator drug and these enter the cells by active transport and induce cytotoxicity to the cells.Conclusion: The overall results from the studies suggest that Entrectinib NS and Pemigatinib NS provided efficient cytotoxic effects, which could play a significant role in the percentage cell death.

Antimicrobial and cytotoxic properties of actinobacteria associated with a stony coral Fungia sp. from Karimunjawa National Park, Indonesia

Coral-associated actinobacteria are prospective resource for obtaining novel bioactive compounds with various biological activities. This research was carried out to isolate and identify coral-associated actinobacteria from Karimunjawa National Park, to study their potential as antimicrobial and cytotoxic agents, to obtain the most prospective actinobacteria with its suitable media for bioactive production, and to characterize the secondary metabolites from the prospective extracts. Analysis of the 16S rRNA gene sequence revealed that the bacteria consisted of Proteobacteria (53.84%), Actinobacteria (30.76%), and Firmicutes (15.40%). Four actinobacteria isolates, namely, Streptomyces pluripotens CM4, Streptomyces ardesiacus CM11, Micrococcus flavus CM13, and Gordonia hongkongensis CM20, were cultivated in A3, A11, and A16 media to produce secondary metabolites. The bioassay screening discovered that S. pluripotens CM4 and S. ardesiacus CM11 exhibited antibacterial and cytotoxicity potential. However, it was noted that extract of S. ardesiacus CM11 from A11 medium was able to inhibit all bacterial pathogens with a range of minimum inhibitory concentration value of 7.81–15.62 µg/ml, while the range of minimum bactericidal concentration value of 7.81–62.50 µg/ ml. In addition, the lowest IC50 value for cytotoxicity was exhibited by S. ardesiacus CM11 from A3 medium (4.43 ± 2.85 µg/ml).

Association of NK cell subsets and cytotoxicity with FCGR3A gene polymorphism in functional NK cell deficiency

SUMMARY OBJECTIVE: The purpose of this study was to assess the association between clinical, laboratory, and functional analyses and polymorphism in the FCGR3A gene in individuals with functional NK cell deficiency. METHODS: A total of 15 functional NK cell deficiency patients and 10 age-matched healthy controls underwent NK cell subgroup, cytotoxicity, and FCGR3A whole-exome analysis with next-generation sequencing. RESULTS: Three different NK cell subsets (CD56brightCD16neg, CD56brightCD16int, and CD56dimCD16hi) were identified. No statistically significant difference was found in the ratio of CD56brightCD16neg cells between patients and controls. CD56brightCD16int and CD56dimCD16hi ratios were found to be significantly lower in patients. As a result of NK cell cytotoxicity analysis, a proportional decrease of K562 amount between patients and controls was found to be statistically significant (p<0.001). In the FCGR3A whole-exome analysis, all patients were found to be homozygous mutant for the c.526G > T (p.V176F) in exon 4, while three patients were homozygous wild type and 12 patients were heterozygous for the c.197T>A (p.L66H) in exon 3. CONCLUSION: In this study, a group of pediatric patients with suspected functional NK cell deficiency were evaluated and the findings indicated that NK subsets, cytotoxicity results, and FCGR3A gene polymorphism were found to be correlated with the clinical features. We conclude that this kind of study might contribute to follow-up the patients in time.

Efficacy of probiotics, paraprobiotics, and postbiotics in colorectal cancer cell line and their role in immune response

SUMMARY OBJECTIVE: The aim of this study was to reveal certain features (anti-tumor/microbial activities) of postbiotics and heat-inactivated paraprobiotics obtained from two different bacteria with determined probiotic properties, which are thought to contribute to human health. METHODS: In the study, Lactobacillus reuteri ENA31 and L. rhamnosus GAA6 strains were used. Supernatants of postbiotically active cultures were used. Paraprobiotics were obtained by exposing probiotic bacteria to high temperatures. The cytotoxic effects of probiotics, paraprobiotics, and postbiotics were evaluated by the MTT method. IL-1/-10/-12/-13, TNF-α, IFN-γ, and neopterin parameters were determined via the ELISA method in immunity studies. RESULTS: It was detected that biotics had a cytotoxic effect on cancer cells with rising concentrations (paraprobiotic<probiotic<postbiotics, respectively). Intercalarily, with these biotic applications, a decline in the values of IL-1, IFN-γ, TNF-α, and neopterin and a rise in the values of IL-10/-12/-13 were observed in cancer cells. CONCLUSION: Our study shows that biotics, which are widely used and beneficial to health, are also available for use in immunocompromised individuals. The resulting paraprobiotics and postbiotics will both increase the conscious use of probiotics and provide the opportunity for use in immunocompromised individuals.

Formulation and assessment of biological properties of garcinia indica fruit extract mouthrinse as an adjunct to oral hygiene regimen: an in vitro analysis

Abstract The prevalence of gingivitis is substantial within the general population, necessitating rigorous oral hygiene maintenance. Objective This study assessed a Garcinia indica (GI) fruit extract-based mouthrinse, comparing it to a 0.1% turmeric mouthrinse and a 0.2% Chlorhexidine (CHX) mouthrinse. The evaluation encompassed substantivity, staining potential, antimicrobial efficacy and cytocompatibility. Methodology The study employed 182 tooth sections. For antimicrobial analysis, 64 extracted human teeth coated with a polymicrobial biofilm were divided into four groups, each receiving an experimental mouthrinse or serving as a control group with distilled water. Microbial reduction was assessed through colony forming units (CFU). Substantivity was evaluated on 54 human tooth sections using a UV spectrophotometer, while staining potential was examined on 64 tooth sections. Cytocompatibility was tested using colorimetric assay to determine non-toxic levels of 0.2% GI fruit extract, 0.1% Turmeric, and 0.2% CHX. Results Data were analysed with one-way ANOVA (α=0.05). Cell viability was highly significant (p<0.001) in the 0.2% GI group (64.1±0.29) compared to 0.1% Turmeric (40.2±0.34) and 0.2% CHX (10.95±1.40). For antimicrobial activity, both 0.2% GI (20.18±4.81) and 0.2% CHX (28.22±5.41) exhibited no significant difference (P>0.05) at end of 12 hours. However, 0.1% Turmeric showed minimal CFU reduction (P<0.001). Substantivity results at 360 minutes indicated statistically significant higher mean release rate in 0.1%Turmeric (12.47±5.84 ) when compared to 0.2% GI (5.02±3.04) and 0.2% CHX (4.13±2.25) (p<0.001). The overall discoloration changes (∆E) were more prominent in the 0.2% CHX group (18.65±8.3) compared to 0.2% GI (7.61±2.4) and 0.1% Turmeric (7.32±4.9) (P<0.001). Conclusion This study supports 0.2% GI and 0.1% Turmeric mouth rinses as potential natural alternatives to chemical mouth rinses. These findings highlight viability of these natural supplements in oral healthcare.

Effect of hydrofluoric acid concentration and aging on the bond strength ceramics to a resin cement

Abstract This study evaluated the influence of hydrofluoric acid (HF) concentration and thermal cycling on the microshear bond strength (µSBS) of a resin luting agent to IPS e.max® CAD and Rosetta® SM. Ceramic specimens (12.0 x 14.0 x 1.5mm) were randomized into 8 groups (n=10) according to HF concentration, commercial brand, and aging. Immediately after polishing, and etching, all specimens were silanized and a layer of adhesive was applied. A PVS mold of 3 mm thickness and 10mm diameter with (four) 1.0mm holes was fabricated, placed on each specimen, and then filled with a resin luting agent. Half of the specimens were subjected to the µSBS test using an Instron at a speed of 1.0 mm/min, following a 24-hour storage in deionized water at 37ºC. The remaining specimens were subjected to thermal cycling (5ºC-55ºC, 30 seconds per bath) and µSBS. The data were evaluated utilizing a three-way ANOVA and Tukey's post-hoc test (α=0.05). Significant differences were found for HF concentration and aging (p<0.0001). No significant difference in µSBS was found for commercial brands (p=0.085). The interaction between brand and HF concentration (p=0.358), brand and aging (p=0.135), and HF concentration and aging (p=0.138) were not statistically significant. The triple interaction among these factors was not statistically significant (p=0.610). In conclusion, the bond strength is affected by the HF concentration. No statistical difference was observed between the two ceramics. Thermal cycling significantly reduced µSBS.

Resumo Este estudo avaliou a influência da concentração do ácido fluorídrico (AF) e da ciclagem térmica na resistência de união ao microcisalhamento (RUµC) de um cimento resinoso para IPS e.max® CAD e Rosetta® SM. Espécimes cerâmicos (12,0 x 14,0 x 1,5mm) foram divididos em 8 grupos (n=10) de acordo com concentração do HF, marca comercial e envelhecimento. Imediatamente após o polimento e condicionamento ácido, todos os espécimes foram silanizados e uma camada de adesivo foi aplicada. Um molde PVS de 3 mm de espessura e 10 mm de diâmetro com (quatro) orifícios de 1,0 mm foi confeccionado, colocado em cada espécime e preenchido com o cimento resinoso. Metade dos espécimes foi submetida ao teste RUµC na Instron a velocidade de 1,0 mm/min, após 24 horas de armazenamento em água deionizada a 37ºC. Os espécimes restantes foram submetidos a ciclagem térmica (5ºC-55ºC, 30 segundos por banho) e a RUµC. Os dados foram avaliados por ANOVA de três fatores e ao teste post-hoc de Tukey (α=0,05). Diferenças significativas foram encontradas para concentração de HF e envelhecimento (p<0,0001). Nenhuma diferença significativa na RUµC foi encontrada para cada marca comercial (p=0,085). A interação entre marca comercial e a concentração do HF (p=0,358), marca comercial e envelhecimento (p=0,135) e concentração do HF e envelhecimento (p=0,138) não foram estatisticamente significativas. A tripla interação entre esses fatores não foi estatisticamente significativa (p=0,610). Concluindo, a resistência de união é afetada pela concentração de HF. Não foi observada diferença estatística entre as duas cerâmicas. A ciclagem térmica reduziu significativamente a resistência de união ao microcisalhamento.

Cytotoxic effects on human dental pulp stem Cells after exposure to adhesive bonding agents

Abstract Studies regarding cytotoxic effects attributed to the use of adhesive bonding agents on pulp tissue are not conclusive. To point out whether these materials are safe for clinical use, in vivo exposure of dental pulp to adhesive bonding agents was simulated using an experimental setup in which Human Dental Pulp Stem Cells (hDPSC) are exposed to the action of two kinds of adhesives: self-etching adhesives and two-step bonding agents through a dentine barrier. Cytotoxic effects on these cells were evaluated by MTT assay protocol and fluorescence microscopy, and their results were contrasted to those obtained through Raman spectra taken on single hDPSCs. Overall, no significant cytotoxic effects were observed by combining all the techniques, and cell viability close to 90% was achieved for a dentine barrier of at least 1 mm thick. Moreover, Raman spectroscopy was able to detect structural DNA damage in some dental pulp cells when exposed to two-step bonding agents, suggesting that this technique could be considered a complementary tool with the potential to evaluate cell toxicity beyond cell viability.

Resumo Os estudos sobre os efeitos citotóxicos atribuídos ao uso de agentes de união adesivo no tecido pulpar não são conclusivos. Para determinar se esses materiais são seguros para uso clínico, a exposição in vivo da polpa dentária a agentes de união adesiva foi simulada por meio de uma configuração experimental na qual as células-tronco da polpa dentária humana (hDPSC) são expostas à ação de dois tipos de adesivos: adesivos autocondicionantes e agentes de união de duas etapas por meio de uma barreira de dentina. Os efeitos citotóxicos nessas células foram avaliados pelo protocolo de ensaio MTT e microscopia de fluorescência, e seus resultados foram contrastados com os obtidos por meio de espectros Raman obtidos em hDPSCs individuais. De modo geral, não foram observados efeitos citotóxicos significativos com a combinação de todas as técnicas, e a viabilidade celular próxima a 90% foi obtida para uma barreira de dentina de pelo menos 1 mm de espessura. Além disso, a espectroscopia Raman foi capaz de detectar danos estruturais ao DNA em algumas células da polpa dentária quando expostas a agentes de colagem de duas etapas, sugerindo que essa técnica poderia ser considerada uma ferramenta complementar com potencial para avaliar a toxicidade celular além da viabilidade celular.

Cytotoxic effects of bioceramic materials on stem cells from human exfoliated deciduous teeth (SHED) / Efeitos citotóxicos de materiais biocerâmicos em células-tronco de dentes decíduos esfoliados humanos (SHED)

Objective: This study aimed to evaluate stem cell from human deciduous teeth (SHED) viability after exposure to different bioceramic materials. Material and Methods: Discs were constructed to obtain the material extracts according to the following groups: G1 - Bio-C Repair, G2 - MTA Repair HP, G3 - TheraCal LC, and G4 ­ Biodentine. Positive and negative control group were respectively maintained with αMEM + 10% FBS and αMEM + 1% FBS. SHED obtained through primary culture were in contact with material extracts for 24, 48, and 72h. MTT assay evaluated cell viability. Groups were plated in triplicate and the cell viability assay were repeated three times. Data were analyzed by two-way ANOVA followed by Tukey test (p<0.05). Results: The treatment and period comparisons showed statistically significant differences (p<0.000). G2 (MTA Repair HP) had greater cell viability values than the other experimental groups and negative control. MTA Repair HP and the control groups exhibited a similar behavior with cell viability values decreasing from 24h to 48h and increasing from 48h to 72h. Bio-C Repair, Biodentine, and Theracal LC did not show statistically significant differences among periods. Conclusions: SHED increased viability values after contact with MTA Repair HP in comparison with other bioceramic materials.(AU)

Objetivo: O objetivo desse estudo foi avaliar a viabilidade de células-tronco de dentes decíduos humanos (SHED) após o contato com diferentes materiais biocerâmicos. Material e Métodos: Foram confeccionados discos para obtenção dos extratos dos materiais de acordo com os seguintes grupos: G1 - Bio-C Repair, G2 - MTA Repair HP, G3 - TheraCal LC e G4 - Biodentine. Grupo de controle positivo e negativo foram mantidos respectivamente com αMEM + 10% FBS e αMEM + 1% FBS. SHED obtidas por cultura primária entraram em contato com os extratos de materiais por 24, 48 e 72h. O ensaio MTT avaliou a viabilidade celular. Os grupos foram semeados em triplicata e o ensaio de viabilidade celular foi repetido três vezes. Os dados foram analisados por ANOVA a dois critérios seguido pelo teste de Tukey (p<0,05). Resultados: As comparações de tratamentos e períodos mostraram diferenças estatisticamente significativas (p<0,000). O G2 (MTA Repair HP) apresentou maiores valores de viabilidade celular que os demais grupos experimentais e controle negativo. O MTA Repair HP e os grupos controle exibiram um comportamento semelhante com os valores de viabilidade celular diminuindo de 24h para 48h e aumentando de 48h para 72h. Bio-C Repair, Biodentine e Theracal LC não apresentaram diferenças estatisticamente significativas entre os períodos. Conclusões: SHED aumentou os valores de viabilidade após o contato com o MTA Repair HP em comparação com outros materiais biocerâmicos (AU)

Investigation of the mutagenic, cytotoxic and antimicrobial effect of bikaverin mycotoxin

Bikaverin is a reddish pigment produced by different fungi species (Mycogone jaapii, Verticillium agaricinum, Beauveria bassiana, Paecilomyces fumosoroseus, Polyporus sulphureus), mainly of the Fusarium genus. Due to its pigment feature, bikaverin can be used as a dye in various fields in the industry. However, it is extremely important to study the mutagenic/genotoxic effects, cytotoxic effects and antimicrobial properties of bikaverin for application of industrial areas. In the study, the mutagenic, cytotoxic and antimicrobial effects of bikaverin were investigated. The mutagenic effect of bikaverin was studied with the Ames test. Salmonella typhimurium TA97a, TA98, TA100, TA102 and TA1535 strains were used in the test. Five different doses of bikaverin (0.075, 0.1, 0.2, 0.3 and 0.5 µg/plate) were tested against strains. It was determined that there was no mutagenic effect of bikaverin. The cytotoxicity of bikaverin was evaluated by MTT test on L929 fibroblast cell line. Bikaverin demonstrated no cytotoxic effect on L929 fibroblast cell line, according to cell viability calculations that showed >73% for all concentrations (1, 0.5, 0.4, 0.3, 0.2, 0.1, 0.075, 0.05, 0.025, 0.01, 0.005 and 0.001 µg/mL) examined. Bikaverin's IC50 value was determined to be 1.79±0.51 g/mL. The antimicrobial activity of the bikaverin was evaluated by using the microdilution method. Bikaverin was found to have antimicrobial effects on Methicillin resistant Staphylococcus aureus, Vancomycin resistant Enterococcus faecalis, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumoniae, Candida albicans and Candida krusei, as MIC values ranged from 1.25 -5 µg/ mL.

In vitro study of immunocompatibility of humanized genetically modified pig erythrocytes with human serum / 器官移植

<b>Objective</b> To investigate the differences and the immunocompatibility of wild-type (WT), four-gene modified (TKO/hCD55) and six-gene modified (TKO/hCD55/hCD46/hTBM) pig erythrocytes with human serum. <b>Methods</b> The blood samples were collected from 20 volunteers with different blood groups. WT, TKO/hCD55, TKO/hCD55/hCD46/hTBM pig erythrocytes, ABO-compatible (ABO-C) and ABO-incompatible (ABO-I) human erythrocytes were exposed to human serum of different blood groups, respectively. The blood agglutination and antigen-antibody binding levels (IgG, IgM) and complement-dependent cytotoxicity were detected. The immunocompatibility of two types of genetically modified pig erythrocytes with human serum was evaluated. <b>Results</b> No significant blood agglutination was observed in the ABO-C group. The blood agglutination levels in the WT and ABO-I groups were higher than those in the TKO/hCD55 and TKO/hCD55/hCD46/hTBM groups (all <i>P</i><0.001). The level of erythrocyte lysis in the WT group was higher than those in the ABO-C, TKO/hCD55 and TKO/hCD55/hCD46/hTBM groups. The level of erythrocyte lysis in the ABO-I group was higher than those in the TKO/hCD55 and TKO/hCD55/hCD46/hTBM groups (both <i>P</i><0.01). The pig erythrocyte binding level with IgM and IgG in the TKO/hCD55 group was lower than those in the WT and ABO-I groups. The pig erythrocyte binding level with IgG and IgM in the TKO/hCD55/hCD46/hTBM group was lower than that in the WT group and pig erythrocyte binding level with IgG was lower than that in the ABO-I group (all <i>P</i><0.05). <b>Conclusions</b> The immunocompatibility of genetically modified pig erythrocytes is better than that of wild-type pigs and close to that of ABO-C pigs. Humanized pig erythrocytes may be considered as a blood source when blood sources are extremely scarce.