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1.
Lupus ; 33(5): 470-480, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38442229

RESUMEN

OBJECTIVE: This study aimed to investigate the correlation between positive psychological capital, post-traumatic growth, social support, and quality of life (QOL) in patients with systemic lupus erythematosus (SLE). METHODS: A cross-sectional study was conducted at the First Affiliated Hospital of Xinjiang Medical University from October 2022 to May 2023. A sample of 330 hospitalized SLE patients was selected for this study. The collected data included demographic information, the SLE disease activity index, the Positive Mental Capital Questionnaire, the Chinese version of the Post-Traumatic Growth Scale, the Social Support Rating Scale, and the Chinese version of the Lupus Quality of Life Scale. RESULTS: The QOL score among the 330 SLE patients was measured as M(P25, P75) of 105 (83.00,124.00). Positive psychological capital, post-traumatic growth, and social support demonstrated significant positive correlations with the QOL in SLE patients (p < 0.05). Multiple linear regression analysis revealed that literacy, disease level, disease duration, occupation, marital status, psychological capital, social support, and post-traumatic growth were influential factors associated with the QOL in SLE patients. CONCLUSION: Medical professionals should be attentive to the psychological well-being of SLE patients and should consider implementing early psychological interventions. These interventions are crucial for enhancing the QOL for individuals diagnosed with SLE.


Asunto(s)
Lupus Eritematoso Sistémico , Crecimiento Psicológico Postraumático , Humanos , Calidad de Vida/psicología , Estudios Transversales , Lupus Eritematoso Sistémico/complicaciones , Apoyo Social , Encuestas y Cuestionarios
2.
Appl Environ Microbiol ; 88(9): e0243621, 2022 05 10.
Artículo en Inglés | MEDLINE | ID: mdl-35416682

RESUMEN

Microbial dysbiosis in dental plaque contributes to the occurrence of dental caries, to which Streptococcus mutans is a major contributor. Lactobacillus casei can be used as probiotic therapy to treat caries by replacing S. mutans within the dental plaque. However, the effects of probiotic treatment are not always stable. Oxyresveratrol (ORV), a plant-derived polyphenol, displays opposite effects in that it inhibits cariogenic and promotes commensal bacteria. Thus, the objectives of this study are to investigate the effects of ORV on bacterial proportions in S. mutans-L. casei biofilm and to elucidate how ORV weakens the competitiveness of S. mutans. Quantitative real-time PCR confirms a decreased S. mutans-L. casei ratio in dual-species biofilm by action of ORV. The culture supernatant of L. casei after being incubated with ORV (ORVLC) is prepared to explore the joint action of ORV and L. casei. ORVLC displays the strongest anti-biofilm effect against S. mutans when compared with the effects of L. casei supernatant or ORV alone. As a result of this treatment, both exopolysaccharides and bacteria contents in the biofilm are greatly reduced. The biofilm is transformed from water-insoluble glucan-dominant to water-soluble glucan-dominant by ORVLC through the modulation of the glycometabolism-related genes of S. mutans. As for the interactions between ORV and L. casei, ORV promotes L. casei to produce acetic acid, which provides L. casei with a competitive advantage against S. mutans. Taken together, ORV may be very suitable as an adjuvant medicine for probiotic therapy in the control of dental caries. IMPORTANCE The homeostatic imbalance in dental plaque associated with a sharp increase in the number of cariogenic bacteria such as Streptococcus mutans is critical for the occurrence and development of caries. Probiotic therapy can restore ecological balance by replacing cariogenic pathogens with probiotics. The current study innovatively finds that oxyresveratrol, a natural polyphenol, can provide probiotic Lactobacillus casei with competitive dominance in its dual-species biofilm with S. mutans. The joint action of oxyresveratrol and L. casei strongly inhibits the biofilm formation of S. mutans. Additionally, oxyresveratrol promotes L. casei to produce acetic acid, which facilitates L. casei to compete with S. mutans. Through the effects of these two mechanisms, oxyresveratrol leads to a significantly decreased S. mutans-L. casei ratio in their dual-species biofilm. Thus, oxyresveratrol is speculated to be an ideal medicine for the prevention and treatment of caries by regulating oral flora balance.


Asunto(s)
Caries Dental , Placa Dental , Lacticaseibacillus casei , Biopelículas , Glucanos , Humanos , Extractos Vegetales , Polifenoles/farmacología , Estilbenos , Streptococcus mutans/genética , Agua/farmacología
3.
BMC Microbiol ; 22(1): 207, 2022 08 26.
Artículo en Inglés | MEDLINE | ID: mdl-36028794

RESUMEN

BACKGROUND: Streptococcus pyogenes is an important global human pathogen that causes pharyngitis, and antibacterial therapy has become an important part of the overall therapy for pharyngitis. As natural derivatives, honey and green tea are often recommended for patients with pharyngitis in traditional Chinese medicine without experimental theoretical basis on wether the combined effect of honey and green tea on pharyngitis is better than they alone. The aims of this study were to explore the effects of artificial honey (AH) and epigallocatechin-3-gallate (EGCG) on S. pyogenes and elucidate the possible mechanisms, which were investigated using MIC (the minimum inhibitory concentration), FIC (fractional inhibitory concentration) index, growth pattern, biofilm formation and RT-qPCR. RESULTS: The MIC of AH on S. pyogenes was 12.5% (v/v) and the MIC of EGCG was 1250 µg/ml. The FIC index of AH and EGCG was 0.5. The planktonic cell growth, growth pattern and biofilm formation assays showed that AH and EGCG mixture had stronger inhibitory effect on S. pyogenes than they alone. RT-qPCR confirmed that the expression of hasA and luxS gene were inhibited by AH and EGCG mixture. CONCLUSIONS: AH and EGCG mixture can inhibit the planktonic cell growth, biofilm formation and some virulence genes expression of S. pyogenes, better than they alone. The combination of honey and green tea have the potential to treat pharyngitis as natural derivatives, avoiding drug resistance and double infection.


Asunto(s)
Catequina , Miel , Faringitis , Animales , Biopelículas , Catequina/análogos & derivados , Humanos , Masculino , Streptococcus pyogenes ,
4.
J Appl Microbiol ; 133(3): 1333-1340, 2022 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-35598180

RESUMEN

AIMS: The purpose of this study was to compare the effect of hop extracts with diverse ß-acid concentrations on Streptococcus mutans biofilm formation. METHODS AND RESULTS: Ten different hop extracts, with α-acid concentrations similar to those found in commercial beer products and ß-acid concentrations ranging from 2.6 to 8.1%, were added to distilled water to make standardized concentrations. S. mutans isolates were treated with hop extract dilutions varying from 1:2 to 1:256. The minimum inhibitory, minimum bactericidal and minimum biofilm inhibitory concentrations were determined and the optical density was evaluated. Live/dead staining confirmed the bactericidal effects. Biofilm formation of several strains of S. mutans was significantly inhibited by hop extract dilutions of 1:2, 1:4, 1:8, 1:16 and 1:32. Strong negative correlations were observed between α- and ß-acid concentrations of the hop extracts and S. mutans total growth and biofilm formation. CONCLUSIONS: The use of hop extracts prepared similarly to commercial beer decreased S. mutans biofilm formation. SIGNIFICANCE AND IMPACT OF THE STUDY: The inclusion of hops in the commercial beer products may provide beneficial health effects. Further studies are warranted to determine an effect in vivo on the development of dental caries.


Asunto(s)
Caries Dental , Streptococcus mutans , Ácidos/farmacología , Antibacterianos/farmacología , Cerveza , Biopelículas , Humanos , Pruebas de Sensibilidad Microbiana , Extractos Vegetales/farmacología
5.
BMC Oral Health ; 22(1): 597, 2022 12 10.
Artículo en Inglés | MEDLINE | ID: mdl-36496389

RESUMEN

BACKGROUND: To retrospectively investigate the success rate of primary-molar pulpectomy performed under general anaesthesia and the potential risk factors that affect the 24-month success rate. METHODS: The case data and two-year follow-up records of children (aged 3-6 years) who received pulpectomy in primary molars performed under general anaesthesia were reviewed and assessed. Potential risk factors included age, gender, decayed-missing-filled teeth, endodontic diagnosis, tooth location, and postobturation sealing of the pulp chamber floor with MTA. With a two-year follow-up period, the outcomes of all the primary molars were classified into success and failure. Survival analysis was used to assess the outcomes. The Kaplan-Meier method was used to analyse the success rate. Univariate and multivariate Cox proportional hazards regression models were used to evaluate the potential risk factors associated with the overall survival of primary molars. RESULTS: A total of 410 teeth from 163 children (88 boys and 75 girls) were included in this study. The overall two-year success rate was 66.1% for all primary molars. The mean overall survival time for this study was 22.1 (95% CI, 21.73‒22.48) months. Multivariate Cox regression analysis demonstrated that endodontic diagnosis (irreversible pulpitis or periapical periodontitis), tooth location (maxillary or mandibular primary molar), and postobturation sealing of the pulp chamber floor (MTA or no-MTA) were significant risk factors for overall survival in this study (P < .05). The differences in success rates were not statistically significant in terms of age, gender, and decayed-missing-filled teeth (P > .05). CONCLUSIONS: When compared to teeth diagnosed with irreversible pulpitis, those with periapical periodontitis failed more frequently. Postobturation sealing of the pulp chamber floor with MTA improved the success rate of pulpectomy in primary molars, especially when the inflammation did not spread to the periradicular area.


Asunto(s)
Periodontitis Periapical , Pulpitis , Niño , Femenino , Masculino , Humanos , Estudios Retrospectivos , Compuestos de Aluminio , Compuestos de Calcio/uso terapéutico , Silicatos , Óxidos , Anestesia General , Combinación de Medicamentos , Análisis de Supervivencia , Resultado del Tratamiento , Diente Primario
6.
Pediatr Allergy Immunol ; 32(3): 445-456, 2021 04.
Artículo en Inglés | MEDLINE | ID: mdl-33190323

RESUMEN

BACKGROUND: Increasing studies suggest that antibiotic exposure during pregnancy may increase the risk of childhood allergic diseases; however, controversy still exists. Thus, we conducted this meta-analysis to evaluate the association between antibiotic use during pregnancy and childhood asthma/wheeze, eczema/atopic dermatitis, and food allergy. METHODS: CENTRAL, EMBASE, and PubMed were searched for studies up to July 20, 2020. Cohort studies and case-control studies that estimated the association of antibiotic exposure in pregnancy with the risk of childhood asthma/wheeze, eczema/atopic dermatitis, and food allergy were included. A random-effects model or fixed-effects model was used to calculate the pooled estimates. The quality of the included studies was assessed by the Newcastle-Ottawa Scale (NOS). Stata12.0 software was used to analyze the association through a meta-analysis. RESULTS: A total of 26 studies were included in the meta-analysis. The results showed that maternal antibiotic exposure in pregnancy and the summary OR for the risk of childhood asthma/wheeze was 1.29 (95% CI = 1.16-1.43), the summary OR for eczema/atopic dermatitis was 1.62 (95% CI = 1.16-2.27), and the pooled OR for food allergy was 1.36 (95% CI = 0.94-1.96). CONCLUSIONS: Our results indicated that maternal antibiotic use during pregnancy might increase the risk of asthma/wheeze and eczema/atopic dermatitis but not food allergy in children. Further studies with larger sample size and robust multivariable adjustment are needed to confirm our findings. Nevertheless, the appropriate use of antibiotics during pregnancy is incredibly important, and healthcare professionals should be selective when prescribing antibiotics for pregnant women.


Asunto(s)
Asma , Hipersensibilidad a los Alimentos , Antibacterianos/efectos adversos , Asma/tratamiento farmacológico , Asma/epidemiología , Niño , Femenino , Hipersensibilidad a los Alimentos/tratamiento farmacológico , Hipersensibilidad a los Alimentos/epidemiología , Humanos , Exposición Materna/efectos adversos , Embarazo , Ruidos Respiratorios
7.
BMC Oral Health ; 21(1): 664, 2021 12 27.
Artículo en Inglés | MEDLINE | ID: mdl-34961505

RESUMEN

Dental general anesthesia (DGA) is an effective treatment for very young children or those who have severe dental fear and mental or physical disabilities. However, the long-term impacts of DGA on oral health-related quality of life (OHRQoL) and parents' anxiety in China are still questionable. This study aimed to assess the influence of DGA on OHRQoL in Chinese children and their parents' psychological status. A total of 204 children and their parents participated in this study. The ECOHIS was applied to evaluate OHRQoL in children. The parents' anxiety was analyzed using the Chinese version of the Kessler 10 scale. The internal consistency was evaluated with Cronbach's alpha coefficient, and Wilcoxon signed-rank test was used for statistical analyses. The scores of each section of ECOHIS decreased one month after the procedure except for the self-image and social sections (P < 0.05). The scores of the Kessler 10 scale decreased one month after DGA and kept decreasing six months later (P < 0.05). The parents' Kessler 10 scores exhibited a moderately positive correlation with the children's ECOHIS scores (r = 0.480, P < 0.05). After DGA, the OHRQoL of Chinese children and their parents' mental health continued to improve. And they exhibited positive correlation.


Asunto(s)
Anestesia Dental , Caries Dental , Anestesia General , Ansiedad , Niño , Preescolar , China , Humanos , Salud Bucal , Padres , Estudios Prospectivos , Calidad de Vida , Encuestas y Cuestionarios
8.
Sichuan Da Xue Xue Bao Yi Xue Ban ; 52(6): 939-942, 2021 Nov.
Artículo en Zh | MEDLINE | ID: mdl-34841758

RESUMEN

Oral Microbiology is a vital component of the basic science of stomatology and an important compulsory course for undergraduate students of stomatology, focusing on the oral microbiology and microecology, the pathogenesis of oral infectious diseases, and the relationship between oral microbes and human health. Our faculty team have made reforms of the theory and laboratory teaching of the course Oral Microbiology. We have introduced in the classroom the concept of Three Comprehensive Approaches to Education-the full involvement of everyone, the through-course approach and all-round education-and offered inquiry-based instruction through a combination of extracting the core information from every chapter, using the core information as the foundation, integrating the core information with clinical problems, and using experiment operation to foster in the students an attitude of solving clinical problems through research. These teaching innovations improved the undergraduate students'motivation to learn. We evaluated the teaching effect with questionnaire surveys. The results suggested that the students showed high interest in learning and were satisfied with our teaching innovations. In addition, student performance evaluation for the course showed significant improvement, indicating that the instructional reform program of Oral Microbiology was conducive to students'understanding and mastery of the course content, improved student motivation to learn and their grades, and received positive reviews from the students. We report herein, from three aspects, the course innovations and the experiences gained. We discussed the significance of integrating ideological and political theories teaching in all courses and using innovative teaching materials and teaching models and, highlighted their importance in the education of stomatology students, and proposed suggestions to further improve the course design of Oral Microbiology.


Asunto(s)
Medicina Oral , Curriculum , Humanos , Aprendizaje , Estudiantes , Enseñanza
9.
Eur J Oral Sci ; 128(1): 18-26, 2020 02.
Artículo en Inglés | MEDLINE | ID: mdl-31970819

RESUMEN

Streptococcus mutans is one of the major pathogens of dental caries. Oxyresveratrol, a natural compound found in plants, exerts inhibitory effects on many bacterial species but its effect on S. mutans is unknown. The objective of this study was to clarify the antibacterial effect of oxyresveratrol on S. mutans, including effects on basic viability, acidogenicity, acidurity, and extracellular polysaccharide synthesis. The expression of nine genes that encode virulence and protective factors in S. mutans was measured by qRT-PCR. Oxyresveratrol showed a dose-dependent inhibitory effect on survival of S. mutans. At 250 µg ml-1 , oxyresveratrol reduced the S. mutans survival rate, inhibited synthesis of water-insoluble glucans, compromised biofilm formation, and significantly down-regulated the expression of glucosyltransferase-I (gtfB) and glucosyltransferase-SI (gtfC). However, the enzymatic activity of lactate dehydrogenase protein was increased and the expression of lactate dehydrogenase (ldh) and ATP synthase subunit beta (atpD) genes were also up-regulated. Besides, glucosyltransferase S (gtfD) up-regulation indicated that water-soluble glucan synthesis was promoted. The vicR, liaR, and comDE genes, which exert a self-protective function in response to external stress, were also up-regulated. In conclusion, oxyresveratrol inhibited the growth of S. mutans and also reduced biofilm formation, acid production, and synthesis of water-insoluble glucans by this organism. In addition, oxyresveratrol also activated a series of S. mutans self-protection mechanisms.


Asunto(s)
Caries Dental , Streptococcus mutans , Biopelículas , Caries Dental/prevención & control , Glucosiltransferasas/genética , Humanos , Extractos Vegetales , Estilbenos , Streptococcus mutans/genética , Virulencia
10.
Curr Issues Mol Biol ; 32: 327-376, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31166175

RESUMEN

Researchers used to focus on analyzing single gene or protein expression of the microbes. But recently, genome, transcriptome, proteome and metabolome have gained more and more attention. Based on technologies of omics, including genomics, transcriptomics and metabolomics, a large quantity of information about cells, microbes and human, such as the information about phylogeny, virulence, antibiotic resistance and other aspects, has been revealed. Genus Streptococcus is one of the most invasive groups of bacteria that cause both human and animal diseases, threatening public health. In this review, we summarize the application of omics to analyze this genus-Streptococcus.


Asunto(s)
Proteínas Bacterianas/genética , Biología Computacional/métodos , Farmacorresistencia Bacteriana Múltiple/genética , Regulación Bacteriana de la Expresión Génica , Genoma Bacteriano , Streptococcus/genética , Antibacterianos/farmacología , Proteínas Bacterianas/metabolismo , Sistemas CRISPR-Cas , Mapeo Cromosómico , ADN Bacteriano/genética , ADN Bacteriano/metabolismo , Transferencia de Gen Horizontal , Secuenciación de Nucleótidos de Alto Rendimiento , Interacciones Huésped-Patógeno/genética , Humanos , Filogenia , Infecciones Estreptocócicas/tratamiento farmacológico , Infecciones Estreptocócicas/microbiología , Infecciones Estreptocócicas/patología , Streptococcus/clasificación , Streptococcus/efectos de los fármacos , Streptococcus/patogenicidad , Virulencia
11.
Int J Mol Sci ; 20(6)2019 Mar 18.
Artículo en Inglés | MEDLINE | ID: mdl-30889875

RESUMEN

A novel dextranase was purified from Penicillium cyclopium CICC-4022 by ammonium sulfate fractional precipitation and gel filtration chromatography. The effects of temperature, pH and some metal ions and chemicals on dextranase activity were investigated. Subsequently, the dextranase was used to produce dextran with specific molecular mass. Weight-average molecular mass (Mw) and the ratio of weight-average molecular mass/number-average molecular mass, or polydispersity index (Mw/Mn), of dextran were measured by multiple-angle laser light scattering (MALS) combined with gel permeation chromatography (GPC). The dextranase was purified to 16.09-fold concentration; the recovery rate was 29.17%; and the specific activity reached 350.29 U/mg. Mw of the dextranase was 66 kDa, which is similar to dextranase obtained from other Penicillium species reported previously. The highest activity was observed at 55 °C and a pH of 5.0. This dextranase was identified as an endodextranase, which specifically degraded the α-1,6 glucosidic bonds of dextran. According to metal ion dependency tests, Li⁺, Na⁺ and Fe2+ were observed to effectively improve the enzymatic activity. In particular, Li⁺ could improve the activity to 116.28%. Furthermore, the dextranase was efficient at degrading dextran and the degradation rate can be well controlled by the dextranase activity, substrate concentration and reaction time. Thus, our results demonstrate the high potential of this dextranase from Penicillium cyclopium CICC-4022 as an efficient enzyme to produce specific clinical dextrans.


Asunto(s)
Dextranasa/aislamiento & purificación , Dextranasa/metabolismo , Penicillium/enzimología , Cromatografía en Gel , Dextranos/metabolismo , Estabilidad de Enzimas/efectos de los fármacos , Concentración de Iones de Hidrógeno , Iones , Cinética , Metales/farmacología , Estándares de Referencia , Dispersión de Radiación , Especificidad por Sustrato/efectos de los fármacos , Temperatura , Factores de Tiempo
12.
Nano Lett ; 17(12): 7968-7973, 2017 12 13.
Artículo en Inglés | MEDLINE | ID: mdl-29178807

RESUMEN

Exploring efficient and economical electrocatalysts for hydrogen evolution reaction is of great significance for water splitting on an industrial scale. Tungsten oxide, WO3, has been long expected to be a promising non-precious-metal electrocatalyst for hydrogen production. However, the poor intrinsic activity of this material hampers its development. Herein, we design a highly efficient hydrogen evolution electrocatalyst via introducing oxygen vacancies into WO3 nanosheets. Our first-principles calculations demonstrate that the gap states introduced by O vacancies make WO3 act as a degenerate semiconductor with high conductivity and desirable hydrogen adsorption free energy. Experimentally, we prepared WO3 nanosheets rich in oxygen vacancies via a liquid exfoliation, which indeed exhibits the typical character of a degenerate semiconductor. When evaluated by hydrogen evolution, the nanosheets display superior performance with a small overpotential of 38 mV at 10 mA cm-2 and a low Tafel slope of 38 mV dec-1. This work opens an effective route to develop conductive tungsten oxide as a potential alternative to the state-of-the-art platinum for hydrogen evolution.

13.
J Food Sci Technol ; 54(7): 2186-2192, 2017 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-28720978

RESUMEN

The lack of aroma and natural taste is a critical problem in production and consumption of instant green teas. A method to prepare instant green teas high in-natural-aroma and low-caffeine by the novel column chromatographic extraction with gradient elution is reported. This method simultaneously extracted aroma (or volatile) and non-aroma compounds from green tea. Green tea was loaded into columns with 2.0-fold of petroleum ether (PE): ethanol (8:2). After standing for 3 h until the aroma compounds dissolved, the column was sequentially eluted with 3.0-fold 40% ethanol and 3.5-fold water. The eluant was collected together and automatically separated into PE and ethanol aqueous phases. The aroma extracts was obtained by vacuum-evaporation of PE phase at 45 °C. The ethanol aqueous phase was vacuum-concentrated to aqueous and partially or fully decaffeinated with 4% or 9% charcoal at 70 °C. A regular instant green tea with epigallocatechin-3-gallate: caffeine of 3.5:1 and a low-caffeine instant green tea (less than 1% caffeine) with excellent aroma and taste were prepared, by combining the aroma and non-aroma extracts at a 1:10 ratio. This work provides a practical approach to solve the low-aroma and low-taste problems in the production of high quality instant green teas.

14.
Curr Microbiol ; 73(3): 426-433, 2016 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-27278805

RESUMEN

Among various preventive approaches, non-invasive phototherapy/photodynamic therapy is one of the methods used to control oral biofilm. Studies indicate that light at specific wavelengths has a potent antibacterial effect. The objective of this study was to determine the effectiveness of violet-blue light at 380-440 nm to inhibit biofilm formation of Streptococcus mutans or kill S. mutans. S. mutans UA159 biofilm cells were grown for 12-16 h in 96-well flat-bottom microtiter plates using tryptic soy broth (TSB) or TSB with 1 % sucrose (TSBS). Biofilm was irradiated with violet-blue light for 5 min. After exposure, plates were re-incubated at 37 °C for either 2 or 6 h to allow the bacteria to recover. A crystal violet biofilm assay was used to determine relative densities of the biofilm cells grown in TSB, but not in TSBS, exposed to violet-blue light. The results indicated a statistically significant (P < 0.05) decrease compared to the non-treated groups after the 2 or 6 h recovery period. Growth rates of planktonic and biofilm cells indicated a significant reduction in the growth rate of the violet-blue light-treated groups grown in TSB and TSBS. Biofilm viability assays confirmed a statistically significant difference between violet-blue light-treated and non-treated groups in TSB and TSBS. Visible violet-blue light of the electromagnetic spectrum has the ability to inhibit S. mutans growth and reduce the formation of S. mutans biofilm. This in vitro study demonstrated that violet-blue light has the capacity to inhibit S. mutans biofilm formation. Potential clinical applications of light therapy in the future remain bright in preventing the development and progression of dental caries.


Asunto(s)
Biopelículas/efectos de la radiación , Streptococcus mutans/fisiología , Streptococcus mutans/efectos de la radiación , Luz , Streptococcus mutans/genética , Streptococcus mutans/crecimiento & desarrollo
15.
Clin Oral Investig ; 20(8): 2139-2148, 2016 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-26787616

RESUMEN

OBJECTIVE: This study evaluated selected properties of a prototype root repair cement containing surface pre-reacted glass ionomer fillers (S-PRG) in comparison to mineral trioxide aggregate (MTA) and intermediate restorative material (IRM). MATERIALS AND METHODS: The antibacterial effect of S-PRG, MTA, and IRM cements was tested against Porphyromonas gingivalis and Enterococcus faecalis after 1 and 3 days of aging of the cements. The set cements were immersed in distilled water for 4 h to 28 days, and ion-releasing ability was evaluated. Initial and final setting times of all cements were evaluated using Gilmore needles. The push-out bond strength between radicular dentin and all cements was tested at different levels of the roots. RESULTS: S-PRG and IRM cements, but not MTA cement, demonstrated significant antibacterial effect against P. gingivalis. All types of cements exhibited significant antibacterial effect against E. faecalis without being able to eliminate the bacterium. S-PRG cement provided continuous release of fluoride, strontium, boron, sodium, aluminum, and zinc throughout all tested time points. Both initial and final setting times were significantly shorter for S-PRG and IRM cements in comparison to MTA. The push-out bond strength was significantly lower for S-PRG cement in comparison to MTA and IRM at coronal and middle levels of the roots. CONCLUSIONS: S-PRG cement demonstrated significant antibacterial effects against endodontic pathogens, multiple ion-releasing ability, relatively short setting time, and low bonding strength. CLINICAL RELEVANCE: S-PRG cement can be used as a one-visit root repair material with promising antibacterial properties and ion-releasing capacity.


Asunto(s)
Cementos Dentales/química , Cementos Dentales/farmacología , Cementos de Ionómero Vítreo/química , Cementos de Ionómero Vítreo/farmacología , Materiales de Obturación del Conducto Radicular/química , Materiales de Obturación del Conducto Radicular/farmacología , Compuestos de Aluminio/química , Compuestos de Aluminio/farmacología , Compuestos de Calcio/química , Compuestos de Calcio/farmacología , Combinación de Medicamentos , Enterococcus faecalis/efectos de los fármacos , Iones/farmacocinética , Ensayo de Materiales , Óxidos/química , Óxidos/farmacología , Porphyromonas gingivalis/efectos de los fármacos , Silicatos/química , Silicatos/farmacología , Espectrofotometría Atómica , Propiedades de Superficie
16.
Front Cell Infect Microbiol ; 14: 1411249, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39035351

RESUMEN

Breast cancer (BrCa) is the most prevalent malignant tumor in women and one of the leading causes of female mortality. Its occurrence and progression are influenced by various factors, including genetics, environment, lifestyle, and hormones. In recent years, the gut microbiota has been identified as a significant factor affecting BrCa. The gut microbiota refers to the collective population of various microorganisms in the human gastrointestinal tract. Gut microbiota is closely associated with human health and disease development, participating in crucial physiological functions such as digestion, metabolism, immune response, and neural regulation. It has been found to influence the occurrence and treatment of BrCa through a variety of mechanisms. This article aims to review the immunomodulatory role of the gut microbiota in the development and treatment of BrCa.


Asunto(s)
Neoplasias de la Mama , Progresión de la Enfermedad , Microbioma Gastrointestinal , Humanos , Neoplasias de la Mama/inmunología , Neoplasias de la Mama/microbiología , Neoplasias de la Mama/terapia , Femenino , Incidencia , Inmunomodulación
17.
Mol Oral Microbiol ; 39(1): 1-11, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38171827

RESUMEN

Breast cancer is among the most prevalent malignancies in women worldwide. Epidemiological findings suggested that periodontal diseases may be associated with breast cancer, among which Fusobacterium nucleatum is considered an important cross-participant. In this work, we comprehensively summarize the known mechanisms of how F. nucleatum translocates to, colonizes in mammary tumors, and promotes the carcinogenesis. Specifically, F. nucleatum translocates to mammary tissue through the mammary-intestinal axis, direct nipple contact, and hematogenous transmission. Subsequently, F. nucleatum takes advantage of fusobacterium autotransporter protein 2 to colonize breast cancer and uses virulence factors fusobacterium adhesin A and lipopolysaccharide to promote proliferation. Moreover, the upregulated matrix metalloproteinase-9 induced by F. nucleatum does not only trigger the inflammatory response but also facilitates the tumor-promoting microenvironment. Aside from the pro-inflammatory effect, F. nucleatum may also be engaged in tumor immune evasion, which is achieved through the action of virulence factors on immune checkpoint receptors highly expressed on T cells, natural killer cells, and tumor-infiltrating lymphocytes. Taking breast cancer as an example, more relevant research studies may expand our current knowledge of how oral microbes affect systemic health. Hopefully, exploring these mechanisms in depth could provide new strategies for safer and more effective biologic and targeted therapies targeted at breast cancer.


Asunto(s)
Neoplasias de la Mama , Neoplasias Colorrectales , Infecciones por Fusobacterium , Humanos , Femenino , Fusobacterium nucleatum/metabolismo , Neoplasias Colorrectales/metabolismo , Neoplasias Colorrectales/patología , Adhesinas Bacterianas/metabolismo , Factores de Virulencia/metabolismo , Infecciones por Fusobacterium/microbiología , Infecciones por Fusobacterium/patología , Microambiente Tumoral
18.
Biomaterials ; 305: 122434, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38141501

RESUMEN

The immunosuppressive tumor microenvironment (TME) greatly limits the actual outcome of immunotherapy. Therefore, it is urgent to develop appropriate strategies to reshape the TME and ultimately induce a strong immune response. Here, we developed a dual-functional liposome loaded with the photothermal agent IR808 near the infrared region (NIR) and Toll-like-receptor-7 (TLR7) agonist loxoribine prodrug (Lipo@IR808@Loxo) to achieve NIR light-triggered photothermal therapy (PTT) and the targeted delivery of immune adjuvants. Under NIR irradiation, Lipo@IR808@Loxo could greatly improve the efficiency of PTT to directly kill tumor cells and release tumor-associated antigens, which could work together with loaded loxoribine to relieve the immunosuppressive TME, effectively promoting the activation of antigen-presenting cells and subsequent antigen presentation. In this way, Lipo@IR808@Loxo could act as an in situ therapeutic cancer vaccine, eventually inducing a potent antitumor T-cell response. When further combined with immune checkpoint blockade, Lipo@IR808@Loxo-mediated photothermal immunotherapy could not only eliminate the primary tumors but also inhibit the growth of distant tumors, thus enhancing the abscopal effect.


Asunto(s)
Nanopartículas , Neoplasias , Humanos , Fototerapia , Receptor Toll-Like 7 , Neoplasias/terapia , Adyuvantes Inmunológicos/farmacología , Inmunoterapia , Microambiente Tumoral , Línea Celular Tumoral
19.
Front Psychol ; 15: 1384374, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39070586

RESUMEN

Background: Adolescents with Nephrotic Syndrome (NS) confront unique challenges that influence their Meaning of Life (MOL), a concept crucial for psychological resilience. The chronic nature of NS and its associated burdens necessitate a deeper exploration of MOL and its determinants within this demographic, previously underexamined in research. This study aims to investigate MOL among Chinese adolescents with NS, identifying key factors influencing their sense of meaning and examining the interrelations with Subjective Well-Being (SWB) and Psychological Security (PS). Methods: Employing a cross-sectional survey design, we analyzed 150 adolescents with NS from Baise City, Guangxi, using the Purpose in Life (PIL) scale alongside PS and SWB scales. Sociodemographic and disease-related variables were assessed for their impact on MOL. Data analysis included descriptive statistics, multiple linear regression, and correlation analyses to explore predictors of MOL and its association with SWB and PS. Results: A significant proportion (62.0%) of participants exhibited MOL scores below the threshold, indicating diminished life meaning. Critical factors impacting MOL included 'left-behind' status, family structure, educational disruptions, and NS duration. Strong correlations emerged between MOL, SWB (r = 0.70, p < 0.01), and PS, highlighting the interdependence of these psychological dimensions. The study further revealed 'Proactivity' as a vital component of MOL, suggesting that despite their challenges, adolescents with NS maintain a keen engagement with life. Key aspects such as 'Certainty in Control', 'Mood of Melancholy or Pleasure', and 'Vitality' emerged as crucial for intervention. Conclusion: The findings underline the profound impact of NS on adolescents' MOL, influenced by both sociodemographic and disease-specific factors. By identifying key areas for psychological intervention, this study contributes to the holistic care and treatment of adolescents with NS, advocating for integrated approaches that address their unique challenges and support systems.

20.
Front Microbiol ; 14: 1061032, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36846768

RESUMEN

With the rapid development of metagenomic high-throughput sequencing technology, more and more oral mucosal diseases have been proven to be associated with oral microbiota shifts or dysbiosis. The commensal oral microbiota can greatly influence the colonization and resistance of pathogenic microorganisms and induce primary immunity. Once dysbiosis occurs, it can lead to damage to oral mucosal epithelial defense, thus accelerating the pathological process. As common oral mucosal diseases, oral mucositis and ulcers seriously affect patients' prognosis and quality of life. However, from the microbiota perspective, the etiologies, specific alterations of oral flora, pathogenic changes, and therapy for microbiota are still lacking in a comprehensive overview. This review makes a retrospective summary of the above problems, dialectically based on oral microecology, to provide a new perspective on oral mucosal lesions management and aims at improving patients' quality of life.

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