Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 9 de 9
Filtrar
Más filtros











Intervalo de año de publicación
1.
Braz J Microbiol ; 54(3): 2093-2102, 2023 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-37526890

RESUMEN

A strain of Lactobacillus plantarum CQPC02 (LP-CQPC02) isolated from naturally fermented kimchi was utilized in this investigation. In order to construct an animal model of lupus nephritis, pristane was used. We then used a kit to identify markers in mouse blood and tissues and a quantitative polymerase chain reaction (qPCR) to measure the expression of genes associated to nuclear factor kappa-B (NF-κB) in mouse kidney tissue. According to the results of the experiments, oral administration of LP-CQPC02 LP-CQPC02 may lessen the lupus nephritis-related rise in urine protein as well as the cytokine levels that were rising in the serum and renal tissues, including IL-6, IL-12, tumor necrosis factor alpha, and interferon. Additionally, in mice with nephritis, LP-CQPC02 can lower serum creatinine (SCr), blood urea nitrogen (BUN), total cholesterol (TC), triglyceride (TG), and raise total protein (TP) and albumin (ALB) levels. In mice with nephritis, LP-CQPC02 can also reduce the positive rate of double-stranded deoxyribonucleic acid (dsDNA). Pathological sections were examined, and it was shown that LP-CQPC02 can lessen tissue damage such incomplete glomerular morphology and inflammatory infiltration brought on by nephritis. In the kidneys of mice with lupus nephritis, LP-CQPC02 can upregulate the expression of inhibitor of NF-κB (IκB-α), downregulate the expression of NF-κB, transforming growth factor-ß1 (TGF-ß1), vascular endothelial growth factor (VEGF), intercellular cell adhesion molecule-1 (ICAM-1), and vascular cell adhesion molecule-1 (VCAM-1). Lactobacillus plantarum CQPC02 has been confirmed to have an intervention effect on nephritis in mice and has the potential as a probiotic.


Asunto(s)
Lactobacillus plantarum , Nefritis Lúpica , Probióticos , Animales , Ratones , Nefritis Lúpica/terapia , Nefritis Lúpica/patología , FN-kappa B/genética , FN-kappa B/metabolismo , Transducción de Señal , Factor A de Crecimiento Endotelial Vascular/metabolismo , Factor A de Crecimiento Endotelial Vascular/farmacología , Probióticos/uso terapéutico
2.
Clin Transl Oncol ; 25(3): 563-577, 2023 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-36355327

RESUMEN

Cancer is frequently caused by microRNAs, which control post-transcriptional levels of gene expression by binding to target mRNAs. MiR-29a-3p has recently been shown to play a twofold function in the majority of malignancies, including colorectal cancer (CRC), according to mounting evidence. Here, we not only briefly summarize such connection between miR-29a-3p and cancers, but aslo primarily evaluate the miR-29a-3p expression pattern, clinical applicability, and molecular mechanisms in CRC to provide a guide for future studies. This review established the diagnostic and prognostic value of miR-29a-3p abnormalty in a variety of clinical samples for CRC. Furthermore, current molecular mechanisms of miR-29a-3p for regulating cancerous biological processes such growth, invasion, metastasis, the epithelial-mesenchymal transformation process, and immunomodulation through its upstream regulatory factors and downstream targeted genes were briefly explored. More specifically, miR-29a-3p has been linked to a few medications that have been shown to have anticancer benefits. To sum up, miR-29a-3p is a promising biomarker and prospective therapeutic target for the diagnosis and prognosis of CRC, but further research is still needed to establish a theoretical basis for more practical applications.


Asunto(s)
Neoplasias Colorrectales , MicroARNs , Humanos , Regulación Neoplásica de la Expresión Génica , MicroARNs/genética , MicroARNs/metabolismo , Pronóstico , Biomarcadores , Neoplasias Colorrectales/genética , Neoplasias Colorrectales/terapia , Neoplasias Colorrectales/patología , Proliferación Celular/genética
3.
Braz. J. Pharm. Sci. (Online) ; 58: e191086, 2022. tab, graf
Artículo en Inglés | LILACS | ID: biblio-1394042

RESUMEN

Abstract Fluoroquinolones are an important class of antimicrobial agents to manage infectious diseases. However, knowledge about how host bile acids are modified by fluoroquinolones is limited. We investigated and compared the impact of fluoroquinolones on circulating bile acid profiles and gut microbiota from in vivo studies. We administered ciprofloxacin (100 mg/kg/day) or moxifloxacin (40 mg/kg/day) orally to male Wistar rats for seven days. Fifteen bile acids (BAs) from the serum and large intestine were quantified by HPLC-MS/MS. The diversity of gut microbiota after ciprofloxacin and moxifloxacin treatment was analyzed using high-throughput, next-generation sequencing technology. The two fluoroquinolone-treated groups had different BA profiles. Ciprofloxacin significantly reduced the hydrophobicity index of the BA pool, reduced secondary BAs, and increased taurine-conjugated primary BAs in both the serum and large intestine as compared with moxifloxacin. Besides, ciprofloxacin treatment altered intestinal microbiota with a remarkable increase in Firmicutes to Bacteroidetes ratio, while moxifloxacin exerted no effect. What we found suggests that different fluoroquinolones have a distinct effect on the host BAs metabolism and intestinal bacteria, and therefore provide guidance on the selection of fluoroquinolones to treat infectious diseases.


Asunto(s)
Animales , Masculino , Ratas , Ácidos y Sales Biliares , Estudio Comparativo , Ciprofloxacina/análisis , Ratas Wistar , Microbioma Gastrointestinal , Moxifloxacino/análisis , Cromatografía Líquida de Alta Presión/métodos , Secuenciación de Nucleótidos de Alto Rendimiento , Interacciones Hidrofóbicas e Hidrofílicas , Intestino Grueso/anomalías , Antiinfecciosos/farmacología
5.
Braz. j. pharm. sci ; 51(3): 525-531, July-Sept. 2015. tab, graf
Artículo en Inglés | LILACS | ID: lil-766312

RESUMEN

L-3-n-butylphthalide (L-NBP) is a naturally occurring antioxidant, which can be used for the treatment of acute ischemic stroke and vascular dementia. This study evaluated the safety, tolerability and pharmacokinetics of L-NBP tablets in healthy Chinese volunteers. This was a single-center, randomized, double-blind, placebo-controlled, single- and multiple-dose study. Subjects were assigned to receive a single dose of L-NBP tablet at either 80, 160, 320, or 480 mg (n=40), or multiple doses of 160 mg twice daily for 7 days (n=12). Plasma samples were analyzed with LC-MS/MS. Pharmacokinetic parameters of L-NBP were calculated using non-compartmental analysis with WinNonlin software. Statistical analysis was performed using SPSS software. All adverse events (AEs) were mild and of limited duration; AEs in this study occurred less frequently and more mildly than AEs listed for the DL-NBP soft capsule. No serious adverse event (SAE), death or withdrawal from the study was observed. In the single-dose study, Cmax was reached at about 1 h, and the mean t1/2 was approximately 13.76 h. Area under curve (AUC) and Cmax increased with dose escalation, but dose proportionality was not observed over the range of 160 to 480 mg. In the multiple-dose study, the steady-state was reached within 3 days with slight accumulation. In summary, the L-NBP tablet was well tolerated in healthy Chinese subjects. Slight accumulation appeared after repeated doses.


L-3-n-butilftalida (L-NMP) é um antioxidante natural, que pode ser utilizado para o tratamento do acidente isquêmico agudo e demência vascular. Este estudo avaliou segurança, tolerância e farmacocinética de comprimidos de L-NBP em chineses voluntários sadios. Este foi um estudo monocêntrico, randomizado, duplo cego, com controle por placebo e doses única e múltipla. Os indivíduos receberam dose única de comprimido de L-NBP de 80, 160, 320 ou 480 mg (n=40) e doses múltiplas de 160 mg duas vezes ao dia, por sete dias (n=12). Amostras de plasma foram analisadas com LC-MS/MS. Os parâmetros farmacocinéticos do L-NBP foram calculados utilizando análise não compartimental, com o programa WinNonlin. A análise estatística foi realizada utilizando-se o programa SPSS. Todos os eventos adversos (EAs) foram moderados e de duração limitada. EAs nesse estudo ocorreram menos frequentemente e mais moderadamente do que os EAs relacionados para cápsulas moles de DL-NBP. Não se observaram eventos adversos graves (EAG), morte ou abandono do estudo. Com dose única, atingiu-se o Cmax em cerca de 1 hora e o t1/2 médio foi de, aproximadamente, 13,76 h. A área sob a curva (ASC) e o Cmax aumentaram com o aumento da dose, mas não se observou proporcionalidade na faixa acima de 160 a 480 mg. No estudo de dose múltipla, o equilíbrio foi alcançado em três dias, com pequeno acúmulo. Em resumo, o comprimido de L-NMP foi bem tolerado em indivíduos chineses saudáveis. O acúmulo pequeno apareceu após doses repetidas.


Asunto(s)
Farmacocinética , Administración Oral , Comprimidos/administración & dosificación , Antioxidantes
6.
Inorg Chem ; 50(10): 4493-502, 2011 May 16.
Artículo en Inglés | MEDLINE | ID: mdl-21476536

RESUMEN

Treatment of [Et(4)N][Tp*WS(3)] (1) (Tp* = hydridotris(3,5-dimethylpyrazol-1-yl)borate) with 2 equiv of AgSCN in MeCN afforded a novel neutral compound [(Tp*WS(2))(2)(µ-S(2))] (2). Reactions of 2 with excess CuX (X = Cl, Br, I) in MeCN and CH(2)Cl(2) or CHCl(3) formed three neutral W/Cu/S clusters [{Tp*W(µ(3)-S)(3)Cu(3)(µ-Cl)}(2)Cu(µ-Cl)(2)(µ(7)-Cl)(MeCN)](2) (3), [{Tp*W(µ(3)-S)(3)Cu(3)}(2)Br(µ-Br)(2)(µ(4)-Br)(MeCN)] (4), and [{Tp*W(µ(3)-S)(3)Cu(3)}(2){Cu(2)(µ-I)(4)(µ(3)-I)(2)}] (5), respectively. On the other hand, treatment of 2 with CuX (X = Cl, Br) in the presence of Et(4)NX (X = Cl, Br) produced two anionic W/Cu/S clusters [Et(4)N][{Tp*W(µ(3)-S)(3)Cu(3)X}(2)(µ-X)(2)(µ(4)-X)] (6: X = Cl; 7 X = Br). Compounds 2-7 were characterized by elemental analysis, IR, UV-vis, (1)H NMR, electrospray ionization (ESI) mass spectra, and single-crystal X-ray crystallography. The dimeric structure of 2 can be viewed as two [Tp*WS(2)] fragments in which two W atoms are connected by one S(2)(2-) dianion. Compounds 3-7 all possess unique halide-bridged double cubanelike frameworks. For 3, two [Tp*W(µ(3)-S)(3)Cu(3)](2+) dications are linked via a µ(7)-Cl(-) bridge, two µ-Cl(-) bridges, and a [Cu(MeCN)(µ-Cl)(2)](+) bridge. For 4, one [Tp*W(µ(3)-S)(3)Cu(3)(MeCN)](2+) dication and one [Tp*W(µ(3)-S)(3)Cu(3)Br](+) cation are linked via a µ(4)-Br(-) and two µ-Br(-) bridges. For 5, the two [Tp*W(µ(3)-S)(3)Cu(3)](2+) dications are bridged by a linear [(µ-I)(2)Cu(µ(3)-I)(2)Cu(µ-I)(2)](4+) species. For 6 and 7, two [Tp*W(µ(3)-S)(3)Cu(3)X](+) cations are linked by a µ(4)-X(-) and two µ-X(-) bridges (X = Cl, Br). In addition, the third-order nonlinear optical (NLO) properties of 2-7 in MeCN/CH(2)Cl(2) were investigated by using femtosecond degenerate four-wave mixing (DFWM) technique.


Asunto(s)
Boratos/síntesis química , Halógenos/química , Profármacos/síntesis química , Pirazoles/síntesis química , Tungsteno/química , Cobre/química , Cristalografía por Rayos X , Espectroscopía de Resonancia Magnética , Modelos Moleculares , Imitación Molecular , Estructura Molecular , Nitrogenasa/química , Compuestos de Plata/química , Espectrometría de Masa por Ionización de Electrospray , Sulfuros/química
7.
Braz. j. microbiol ; Braz. j. microbiol;40(2): 373-379, Apr.-June 2009. ilus, graf, tab
Artículo en Inglés | LILACS | ID: lil-520226

RESUMEN

A lipopeptide biosurfactant produced by Bacillus natto TK-1 has a strong surface activity. The biosurfactant was found to be an anti-adhesive agent against several bacterial strains, and also showed a broad spectrum of antimicrobial activity. The biosurfactant induced a significant reduction in tumor cells viability in a dose- dependent manner.


Um lipopeptídio biosurfactante produzido por Bacillus natto TK-1 apresenta intensa atividade de superfície. Verificou-se que o biosurfactante apresentou atividade antiadesiva contra várias cepas bacterianas, e também atividade antimicrobiana de amplo espectro. O biosurfactante causou uma redução significativa na viabilidade de células tumorais, de forma dose-dependente.


Asunto(s)
Humanos , Bacillus subtilis , Péptidos/análisis , Células Tumorales Cultivadas , Métodos , Métodos
8.
Braz J Microbiol ; 40(2): 373-9, 2009 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-24031375

RESUMEN

A lipopeptide biosurfactant produced by Bacillus natto TK-1 has a strong surface activity. The biosurfactant was found to be an anti-adhesive agent against several bacterial strains, and also showed a broad spectrum of antimicrobial activity. The biosurfactant induced a significant reduction in tumor cells viability in a dose-dependent manner.

9.
Artículo en Inglés | VETINDEX | ID: vti-444396

RESUMEN

A lipopeptide biosurfactant produced by Bacillus natto TK-1 has a strong surface activity. The biosurfactant was found to be an anti-adhesive agent against several bacterial strains, and also showed a broad spectrum of antimicrobial activity. The biosurfactant induced a significant reduction in tumor cells viability in a dose- dependent manner.


Um lipopeptídio biosurfactante produzido por Bacillus natto TK-1 apresenta intensa atividade de superfície. Verificou-se que o biosurfactante apresentou atividade antiadesiva contra várias cepas bacterianas, e também atividade antimicrobiana de amplo espectro. O biosurfactante causou uma redução significativa na viabilidade de células tumorais, de forma dose-dependente.

SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA