Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 62
Filtrar
Más filtros

Bases de datos
País/Región como asunto
Tipo del documento
Intervalo de año de publicación
1.
Int J Mol Sci ; 24(14)2023 Jul 24.
Artículo en Inglés | MEDLINE | ID: mdl-37511600

RESUMEN

Melanin production is an important process that prevents the host skin from harmful ultraviolet radiation; however, an overproduction of melanin results in skin diseases. In the present study, we determined the antioxidative and anti-melanogenic activities of polyphenol- and flavonoid-enriched rice seed extracts in melan-a cells. The polyphenol and flavonoid content of Hopum (HP) and Sebok (SB) rice seed extracts was measured. The antioxidant capacity was determined using the ABTS radical scavenging method. SB contained high amounts of polyphenols and flavonoids, which significantly increased antioxidative activity compared with HP. Various concentrations of these extracts were evaluated in a cytotoxicity using melan-a cells. At 100 µg/mL, there was no significant difference for all treatments compared with untreated cells. Therefore, 100 µg/mL was selected as a concentration for the further experiments. SB significantly suppressed the phosphorylation/activation of p-38 MAPK, increased the expression of phosphorylated ERK 1/2 and Akt, and downregulated the microphthalmia-associated transcription factor (MITF). This resulted in decreased levels of tyrosinase and tyrosinase-related protein-1 and -2. These results indicate the potential of polyphenol- and flavonoid-enriched rice seed as a treatment for hyperpigmentation.


Asunto(s)
Melaninas , Oryza , Melaninas/metabolismo , Flavonoides/farmacología , Polifenoles/farmacología , Regulación hacia Abajo , Oryza/metabolismo , Transducción de Señal , Factor de Transcripción Asociado a Microftalmía/metabolismo , Antígeno MART-1/metabolismo , Antígeno MART-1/farmacología , Rayos Ultravioleta , Monofenol Monooxigenasa/metabolismo , Extractos Vegetales/farmacología , Línea Celular Tumoral
2.
Molecules ; 28(15)2023 Jul 29.
Artículo en Inglés | MEDLINE | ID: mdl-37570719

RESUMEN

Obesity is a major risk factor for a variety of diseases and contributes to chronic inflammation. Resveratrol is a naturally occurring antioxidant that can reduce adipogenesis. In this study, the antiadipogenic and anti-inflammatory activities of resveratrol-enriched rice were investigated in 3T3-L1 adipocyte cells. Cotreatment of dexamethasone and isobutylmethylxanthin upregulated adipogenic transcription factors and signaling pathways. Subsequent treatment of adipocytes with rice seed extracts suppressed the differentiation of 3T3-L1 by downregulating adipogenic transcription factors (peroxisome proliferator-activated receptor γ and CCAAT/enhancer-binding protein α) and signaling pathways (extracellular signal-regulated kinase 1/2 and protein kinase B Akt), this was especially observed in cells treated with germinated resveratrol-enriched rice seed extract (DJ526_5). DJ526_5 treatment also markedly reduced lipid accumulation in the cells and expression of adipogenic genes. Lipopolysaccharide (LPS)-induced inflammatory cytokines (prostaglandin-endoperoxide synthase 2 (COX-2), tumor necrosis factor (TNF)-α, interleukin (IL)-1ß, and IL-6) decreased in cells treated with DJ526_5. Collectively, DJ526_5 exerts antiadipogenic effects by suppressing the expression of adipogenesis transcription factors. Moreover, DJ526_5 ameliorates anti-inflammatory effects in 3T3-L1 adipocytes by inhibiting the activation of phosphorylation NF-κB p65 and ERK ½ (MAPK). These results highlight the potential of resveratrol-enriched rice as an alternative obesity-reducing and anti-inflammatory agent.


Asunto(s)
Adipogénesis , Oryza , Ratones , Animales , Oryza/metabolismo , Resveratrol/farmacología , Resveratrol/metabolismo , Células 3T3-L1 , Diferenciación Celular , Obesidad/metabolismo , Factores de Transcripción/metabolismo , Semillas/metabolismo , Adipocitos , PPAR gamma/metabolismo
3.
Molecules ; 28(13)2023 Jun 21.
Artículo en Inglés | MEDLINE | ID: mdl-37446559

RESUMEN

Inflammation is triggered by a variety of danger signals and is now a worldwide concern. Resveratrol, a natural nonflavonoid polyphenol found in naturally consumed plants and foods, has a wide spectrum of bioactive potency. We successfully generated resveratrol-enriched rice by introducing the resveratrol biosynthesis gene into Dongjin rice. In this study, resveratrol- and piceid-enriched rice (DJ526) was investigated for its anti-inflammatory activity in lipopolysaccharide (LPS)-stimulated RAW264.7 cells compared to normal rice (DJ). In addition, the 5-day-old germinated DJ526 (DJ526_5) was tested for its anti-inflammatory effects. The piceid and resveratrol amounts increased in DJ526_5 by germination. Treatment of LPS-stimulated RAW264.7 cells with resveratrol-enriched rice seed extracts (DJ526_0 and DJ526_5) significantly decreased the production of nitric oxide (NO) and the inflammatory mediator prostaglandin E2 (PGE2), downregulated proinflammatory gene expression, and inhibited nuclear factor kappa B (NF-κB) p65, p38 mitogen-activated protein kinase, and extracellular signal-regulated kinase 1/2 (ERK 1/2) phosphorylation. These findings demonstrated the anti-inflammatory mechanisms of resveratrol-enriched rice in LPS-stimulated RAW264.7 cells. Furthermore, resveratrol-enriched rice could be a potential source of anti-inflammatory agents.


Asunto(s)
Lipopolisacáridos , Estilbenos , Animales , Ratones , Resveratrol/farmacología , Lipopolisacáridos/farmacología , Antiinflamatorios/farmacología , Estilbenos/farmacología , Células RAW 264.7 , FN-kappa B/metabolismo , Óxido Nítrico/metabolismo , Óxido Nítrico Sintasa de Tipo II/metabolismo
4.
Br J Anaesth ; 128(4): 679-690, 2022 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-35120712

RESUMEN

BACKGROUND: Anaesthesia and perioperative management contribute to long-term outcomes of patients with cancer, including pancreatic ductal adenocarcinoma. We assessed the antitumour, anti-inflammatory, and analgesic effects of midazolam on LSL-KrasG12D/+;Trp53flox/flox;Pdx-1cre/+ transgenic mice with pancreatic ductal adenocarcinoma. METHODS: Six-week-old transgenic mice were administered midazolam 30 mg kg-1 day-1 p.o. (n=13); midazolam 30 mg kg-1 day-1 with 1-(2-chlorophenyl)-N-methyl-N(1-methylpropyl)-3-isoquinoline carboxamide (PK11195) 3 mg kg-1 day-1 i.p., a peripheral benzodiazepine receptor antagonist (n=10); or vehicle (water; n=14) until the humane endpoint. Cancer-associated pain was evaluated using hunching score and mouse grimace scale. Tumour stage and immuno-inflammatory status were determined histopathologically. Anti-proliferative and apoptotic potentials of midazolam were investigated using mouse pancreatic ductal adenocarcinoma cell lines. RESULTS: Midazolam significantly inhibited tumour size and proliferative index of Ki-67 and cyclins in pancreatic ductal adenocarcinoma, which was blocked by administration of PK11195. Local myeloperoxidase+ tumour-associated neutrophils, arginase-1+ M2-like tumour-associated macrophages, and CD11b+Ly-6G+ polymorphonuclear myeloid-derived suppressor cells were reduced by midazolam, which was antagonised by administration of PK11195. Hunching and mouse grimace scale were improved by midazolam, whereas the scores increased with midazolam+PK11195 treatment. Plasma pro-inflammatory cytokines, such as interleukin-6 and CC chemokine ligand (CCL)2, CCL3, and CCL5, were reduced by midazolam, whereas these cytokines increased with PK11195. Midazolam inhibited pancreatic ductal adenocarcinoma proliferation through downregulation of cyclins and cyclin-dependent kinases and induced apoptosis in vitro. CONCLUSIONS: These results suggest that midazolam inhibits pancreatic ductal adenocarcinoma proliferation and local infiltration of tumour-associated neutrophils, tumour-associated macrophages, and polymorphonuclear myeloid-derived suppressor cells, thereby inhibiting pancreatic ductal adenocarcinoma progression.


Asunto(s)
Carcinoma Ductal Pancreático , Neoplasias Pancreáticas , Animales , Carcinoma Ductal Pancreático/tratamiento farmacológico , Carcinoma Ductal Pancreático/metabolismo , Carcinoma Ductal Pancreático/patología , Modelos Animales de Enfermedad , Humanos , Ratones , Ratones Transgénicos , Midazolam/farmacología , Midazolam/uso terapéutico , Neoplasias Pancreáticas/tratamiento farmacológico
5.
Molecules ; 27(6)2022 Mar 17.
Artículo en Inglés | MEDLINE | ID: mdl-35335317

RESUMEN

Resveratrol is a powerful antioxidant that defends against oxidative stress in cells but is not found in large quantities in plants. Resveratrol-enriched rice DJ526, which was developed as a functional crop, shows a diverse range of biological activities. Resveratrol production is measured as total resveratrol and its glycoside, piceid, which is mainly found in plant-derived resveratrol. In the present study, elicitation using yeast extract (YE), methyl jasmonate, and jasmonic acid increased resveratrol production in DJ526 rice seeds. DJ526 seeds elicited using 1 g/L (YE1) and 5 g/L yeast extract (YE5) showed enhanced resveratrol production and antioxidant activity. YE5-treated DJ526 seeds showed decreased melanin content by 46.1% and 37.0% compared with the negative control and DJ526 (non-elicitation), respectively. Both YE1 and YE5 efficiently improved the wound-healing activity by reducing the wound gap faster than in untreated cells, with a maximum rate of 60.2% at 24 h and complete closure at 48 h. YE1 and YE5 significantly decreased the levels of proinflammatory cytokine, TNF-α, and enhanced collagen synthesis in inflammatory cells. These findings indicate that YE-treated resveratrol rice DJ526 may improve resveratrol production and could be an active antiaging ingredient for cosmetic and skin therapy applications.


Asunto(s)
Oryza , Envejecimiento de la Piel , Antioxidantes/farmacología , Resveratrol/farmacología
6.
Gut ; 70(9): 1713-1723, 2021 09.
Artículo en Inglés | MEDLINE | ID: mdl-33087490

RESUMEN

OBJECTIVE: Pancreatic ductal adenocarcinoma (PDAC) is the deadliest cancer. Cancer-associated thrombosis/thromboembolism (CAT), frequently observed in PDAC, is known as a poor prognostic factor. Here, we investigated the underlying mechanisms between PDAC and CAT, and performed a trial of therapeutic approach for PDAC using a genetically engineered mouse model, PKF (Ptf1acre/+;LSL-KrasG12D/+;Tgfbr2flox/flox ). DESIGN: Presence of CAT in PKF mice was detected by systemic autopsy. Plasma cytokines were screened by cytokine antibody array. Murine and human plasma atrial natriuretic peptide (ANP) and soluble vascular cell adhesion molecule 1 (sVCAM-1) were determined by ELISA. Distribution of VCAM-1 in PKF mice and human autopsy samples was detected by immunohistochemistry. PKF mice were treated with anti-VCAM-1 antibody and the effects on survival, distribution of CAT and the tumour histology were analysed. RESULTS: We found spontaneous CAT with cardiomegaly in 68.4% PKF mice. Increase of plasma ANP and sVCAM-1 was observed in PKF mice and PDAC patients with CAT. VCAM-1 was detected in the activated endothelium and thrombi. Administration of anti-VCAM-1 antibody to PKF mice inhibited tumour growth, neutrophil/macrophage infiltration, tumour angiogenesis and progression of CAT; moreover, it dramatically extended survival (from 61 to 253 days, p<0.01). CONCLUSION: Blocking VCAM-1/sVCAM-1 might be a potent therapeutic approach for PDAC as well as CAT, which can contribute to the prognosis. Increase of plasma ANP and sVCAM-1 might be a diagnostic approach for CAT in PDAC.


Asunto(s)
Carcinoma Ductal Pancreático/patología , Neoplasias Pancreáticas/patología , Trombosis/etiología , Molécula 1 de Adhesión Celular Vascular/metabolismo , Animales , Carcinoma Ductal Pancreático/complicaciones , Carcinoma Ductal Pancreático/terapia , Femenino , Humanos , Masculino , Ratones , Ratones Noqueados , Neoplasias Pancreáticas/complicaciones , Neoplasias Pancreáticas/terapia , Trombosis/prevención & control , Microambiente Tumoral
7.
Biomed Chromatogr ; 31(6)2017 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-27862109

RESUMEN

In this study, an analytical method was developed for quantification of residues of the anthelmintic drug phenothiazine (PTZ) in pork muscle using liquid chromatography-tandem mass spectrometry. Muscles were extracted using 0.2% formic acid and 10 mm ammonium formate in acetonitrile, defatted and purified using n-hexane. The drug was well separated on a Waters XBridge™ C18 analytical column using a binary solvent system consisting of 0.2% formic acid and 10 mm ammonium formate in ultrapure water (A) and acetonitrile (B). Good linearity was achieved over a six-point concentration range in matrix-matched calibration with determination coefficient =0.9846. Fortified pork muscle having concentrations equivalent to and double the limit of quantification (1 ng/g) yielded recovery ranges between 100.82 and 104.03% and relative standard deviations <12%. Samples (n = 5) collected from large markets located in Seoul City tested negative for PTZ residue. In conclusion, 0.2% formic acid and ammonium formate in acetonitrile can effectively extract PTZ from pork muscle without solid-phase extraction, a step normally required for cleanup before analysis and the validated method can be used for routine analysis to ensure the quality of animal products.


Asunto(s)
Cromatografía Liquida/métodos , Productos de la Carne/análisis , Músculos/química , Fenotiazinas/análisis , Espectrometría de Masas en Tándem/métodos , Animales , Límite de Detección , Porcinos
8.
Biomed Chromatogr ; 31(11)2017 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-28449378

RESUMEN

An analytical method was developed for the detection of toldimfos sodium residues in porcine muscle and bovine milk using liquid chromatography-triple quadrupole tandem mass spectrometry (LC-MS/MS) analysis. The drug was extracted from muscle and milk using 10 mm ammonium formate in acetonitrile and then purified using n-hexane. The drug was well separated on a Luna C18 column using a mixture of 10 mm ammonium formate in ultrapure water (A) and acetonitrile (B) as the mobile phase. Good linearity was achieved over the tested concentration range (0.005-0.03 mg/kg) in matrix-matched standard calibration. The determination coefficients (R2 ) were 0.9942 and 0.9898 for muscle and milk, respectively. Fortified porcine muscle and bovine milk contained concentrations equivalent to and twice the limit of quantification (0.005 mg/kg) yielded recoveries in the range of 75.58-89.74% and relative standard deviations of ≤8.87%. Samples collected from large markets located in Seoul, Republic of Korea, tested negative for toldimfos sodium residue. In conclusion, ammonium formate in acetonitrile can effectively extract toldimfos sodium from porcine muscle and bovine milk without solid-phase extraction, which is usually required for cleanup before analysis. This method can be applied for the routine analysis of toldimfos in foods of animal origins.


Asunto(s)
Cromatografía Liquida/métodos , Residuos de Medicamentos/análisis , Carne/análisis , Leche/química , Ácidos Fosfínicos/análisis , Drogas Veterinarias/análisis , Animales , Bovinos , Límite de Detección , Modelos Lineales , Músculos/química , Reproducibilidad de los Resultados , Porcinos , Espectrometría de Masas en Tándem/métodos
9.
J Sep Sci ; 39(5): 835-41, 2016 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-26697949

RESUMEN

A quick, easy, cheap, effective, rugged, and safe QuEChERS (method) was used for the simultaneous detection of four veterinary drug residues, namely naloxone, yohimbine, thiophanate, and altrenogest, in porcine muscle, using liquid chromatography with electrospray ionization triple quadrupole tandem mass spectrometry. Because of the unavailability of a suitable internal standard, matrix-matched calibrations were used for quantification, with determination coefficients ≥ 0.9542. The accuracy (expressed as recovery %) ranged from 60.53 to 83.25%, and the intra- and interday precisions (expressed as relative standard deviations) were <12%. The limits of quantification were 5, 0.5, 2, and 5 ng/g for naloxone, yohimbine, thiophanate, and altrenogest, respectively. Samples purchased from local markets in Seoul, Republic of Korea, revealed no traces of the target analytes. The developed method described herein is sensitive and reliable and can be applied to quantify the tested veterinary drugs in animal tissues.


Asunto(s)
Residuos de Medicamentos/aislamiento & purificación , Músculos/química , Naloxona/aislamiento & purificación , Extracción en Fase Sólida/métodos , Tiofanato/aislamiento & purificación , Acetato de Trembolona/análogos & derivados , Drogas Veterinarias/aislamiento & purificación , Yohimbina/aislamiento & purificación , Animales , Cromatografía Líquida de Alta Presión , Residuos de Medicamentos/análisis , Contaminación de Alimentos/análisis , Límite de Detección , Carne/análisis , Naloxona/análisis , Porcinos , Espectrometría de Masas en Tándem , Tiofanato/análisis , Acetato de Trembolona/análisis , Acetato de Trembolona/aislamiento & purificación , Drogas Veterinarias/análisis , Yohimbina/análisis
10.
Environ Monit Assess ; 188(6): 348, 2016 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-27178050

RESUMEN

A liquid chromatography-electrospray ionization tandem mass spectrometry (LC/ESI-MS/MS) method was developed for monitoring and detection of four different drugs, namely acetanilide, pentylenetetrazole, phenacetin, and tetramethrin in porcine muscle, pasteurized milk, and table egg samples. For acetanilide and pentylenetetrazole, the samples were extracted with 0.1 % formic acid in acetonitrile, followed by defatting with n-hexane, partitioning at -20 °C for 1 h, centrifugation, and filtration, whereas the quick, easy, cheap, effective, rugged, and safe "QuEChERS" method was used for phenacetin and tetramethrin. The final extracts were combined and analyzed in a single chromatographic run using an XBridge(TM) analytical column and 0.1 % formic acid and 10 mM ammonium formate in ultrapure water (A) and 0.1 % formic acid and 10 mM ammonium formate in methanol (B) as the mobile phase. Owing to the unavailability of internal standards, matrix-matched calibrations were used for analyte quantification with coefficients of determination (R (2)) ≥ 0.9865. The intra- and inter-day accuracies ranged from 60.75 to 90.90 % and from 63.75 to 89.30 %, respectively, while the respective analytical precisions were 1.48-17.44 % (23.3 % for porcine sample spiked with phenacetin) and 1.97-15.78 %. The limits of quantification (LOQ) were between 0.5 and 2.5 ng/g in the matrices tested. Food samples purchased from local markets in Seoul were analyzed using the developed method and none of the tested drugs was detected.


Asunto(s)
Huevos/análisis , Monitoreo del Ambiente/métodos , Leche/química , Músculos/química , Porcinos/metabolismo , Drogas Veterinarias/análisis , Animales , Cromatografía Liquida/métodos , Contaminación de Alimentos/análisis , Carne/análisis , Leche/metabolismo , Músculos/metabolismo , Porcinos/sangre , Espectrometría de Masas en Tándem/métodos , Drogas Veterinarias/farmacocinética
11.
J Sep Sci ; 38(16): 2772-80, 2015 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-26033853

RESUMEN

A multiclass, multiresidue determination method is reported for the detection of ten veterinary drugs, including scopolamine, metoclopramide, acriflavine, berberine, tripelennamine, diphenhydramine, acrinol, triamcinolone, loperamide, and roxithromycin in pork, milk, and eggs. The method involves a simple extraction using 0.1% formic acid in acetonitrile, followed by defatting with n-hexane, centrifugation, and filtration prior to liquid chromatography with tandem mass spectrometric analysis. As ion suppression and enhancement effects are reported, matrix-matched calibrations are used for quantification, with determination coefficients ≥0.9765. For the majority of the tested analytes, the intra- and interday accuracy (expressed as recovery %) range from 70.6 to 94.6% and from 70.1 to 93.3%, respectively, and the precision (expressed as relative standard deviation) ranges from 0.5 to 19.8% and from 2.8 to 18.4% in all matrices. The limits of quantification range between 0.5 and 10 ng/g. The validated tandem mass spectrometry method is successfully applied to market samples; the target analytes are not detected in any of the tested samples. In terms of accuracy, no extract cleanup is deemed necessary. The developed method is feasible for the simultaneous detection of the tested analytes in pork, milk, and eggs.


Asunto(s)
Cromatografía Líquida de Alta Presión/métodos , Residuos de Medicamentos/química , Huevos/análisis , Carne/análisis , Leche/química , Espectrometría de Masas en Tándem/métodos , Drogas Veterinarias/química , Animales , Bovinos , Pollos , Porcinos
12.
J Sep Sci ; 38(23): 4048-54, 2015 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-26434939

RESUMEN

The concentrations of residual aminopyrine and antipyrine in porcine muscle, milk, and egg samples were analyzed using liquid chromatography with tandem mass spectrometry after undergoing a series of sample pretreatment steps. Owing to an ion suppression effect, matrix-matched calibrations were used for analyte quantitation with determination coefficients (R(2) ) ≥ 0.9931. The recovery rates for aminopyrine and antipyrine in various matrices at two spiking levels (5 and 10 ng/g) fell in the range of 60.96-68.87 and 61.87-66.99%, respectively. Meanwhile, the intra- and inter-day precisions (expressed as relative standard deviation) were 1.02-12.95 and 1.71-5.50%, respectively. The method's detection limit (1 ng/g) was very low, thus enabling the detection of low residue levels. The applicability of the developed method was demonstrated with actual market samples and none of the tested analytes was detected in any of the samples.


Asunto(s)
Aminopirina/análisis , Antipirina/análisis , Cromatografía Liquida , Huevos/análisis , Análisis de los Alimentos/métodos , Leche/química , Músculos/química , Espectrometría de Masas en Tándem , Aminopirina/metabolismo , Animales , Antipirina/metabolismo , Límite de Detección , Estructura Molecular , Porcinos
13.
Antioxidants (Basel) ; 13(6)2024 May 21.
Artículo en Inglés | MEDLINE | ID: mdl-38929064

RESUMEN

The excessive production of melanin can cause skin diseases and hyperpigmentation. In this study, resveratrol contained in Dongjin rice seed (DJ526) was increased through callus induction. The antioxidant capacity of resveratrol-enriched rice callus was evaluated using the ABTS radical scavenging method and was equivalent to that of vitamin C. DJ526 rice callus extract significantly increased antioxidant activities in a concentration-dependent manner. The anti-melanogenesis effects of DJ526 rice callus extract were also evaluated in melan-a cells. Resveratrol-enriched rice callus extract significantly (i) decreased the size and number of melanin-containing cells, (ii) suppressed the activity of cellular tyrosinase and melanin content, (iii) downregulated the expression of microphthalmia-associated transcription factor, tyrosinase, tyrosinase-related protein-1, and tyrosinase-related protein-2, (iv) increased the expression of phosphorylated extracellular signal-regulated kinase 1/2 and protein kinase B, and (v) inhibited the activation of phosphorylated p38 in melan-a cells. From the above observations, DJ526 rice callus extract showed strong antioxidant and anti-melanogenesis activity at the concentration test. These findings indicate the potential of resveratrol-enriched rice callus as a novel agent for controlling hyperpigmentation.

14.
Reg Anesth Pain Med ; 49(3): 200-208, 2024 Mar 04.
Artículo en Inglés | MEDLINE | ID: mdl-37353355

RESUMEN

INTRODUCTION: Tramadol, a weak opioid anesthetic, is used for pain management in patients with cancer, but the effects of tramadol on cancer via µ-opioid receptor are still unknown. We assessed the effects of tramadol on pancreatic ductal adenocarcinoma using transgenic mice (LSL-KrasG12D/+; Trp53flox/flox; Pdx-1cre/+ ). METHODS: Six-week-old transgenic mice were orally administered 10 mg/kg/day tramadol (n=12), 10 mg/kg/day tramadol and 1 mg/kg/day naltrexone (n=9), or vehicle water (n=14) until the humane endpoint. Cancer-related pain and plasma cytokine levels were assessed by the mouse grimace scale and cytokine array, respectively. Tumor status was determined histopathologically. Tramadol's effects on proliferation and invasion in pancreatic ductal adenocarcinoma cell lines were studied in vitro. RESULTS: Tramadol with/without naltrexone improved mouse grimace scale scores while decreasing inflammatory cytokines such as tumor necrosis factor-α and interleukin-6. Proliferative Ki-67 and cyclins decreased by tramadol, while local M1-like tumor-associated macrophages increased by tramadol, which was blocked by naltrexone. Meanwhile, tramadol with/without naltrexone reduced juxta-tumoral cancer-associated fibroblasts and M2-like tumor-associated macrophages. Tumor-associated neutrophils, natural killers, and cytotoxic T cells were not altered. Tramadol decreased the proliferative and invasive potentials of pancreatic ductal adenocarcinoma cell lines via decreasing cyclins/cyclin-dependent kinases, which was partially reversed by naltrexone. CONCLUSIONS: These findings imply that tramadol might be a useful anesthetic for pancreatic ductal adenocarcinoma: inhibiting the proliferation and invasion along with increasing antitumor M1-like tumor-associated macrophages via the µ-opioid receptor, while improving cancer-associated pain possibly through the antitumor effects with the decrease of inflammatory cytokines.


Asunto(s)
Anestésicos , Carcinoma Ductal Pancreático , Neoplasias Pancreáticas , Tramadol , Humanos , Ratones , Animales , Tramadol/farmacología , Tramadol/uso terapéutico , Naltrexona , Receptores Opioides , Neoplasias Pancreáticas/tratamiento farmacológico , Neoplasias Pancreáticas/metabolismo , Carcinoma Ductal Pancreático/tratamiento farmacológico , Carcinoma Ductal Pancreático/metabolismo , Carcinoma Ductal Pancreático/patología , Ratones Transgénicos , Citocinas , Ciclinas
15.
Mycobiology ; 52(1): 68-84, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38415173

RESUMEN

A rapid decline of Abies koreana has been reported in most of the natural alpine habitats in Korea. It is generally accepted that this phenomenon is due to climate change even though no clear conclusions have been drawn. Most research has focused on abiotic environmental factors, but studies on the relationships between A. koreana and soil fungal microbiomes are scarce. In this study, the rhizoplane and rhizosphere fungal communities in the alive and dead Korean fir trees from its three major natural habitats including Mt. Deogyu, Mt. Halla, and Mt. Jiri in Korea were investigated to identify specific soil fungal groups closely associated with A. koreana. Soil fungal diversity in each study site was significantly different from another based on the beta diversity calculations. Heat tree analysis at the genus level showed that Clavulina, Beauveria, and Tomentella were most abundant in the healthy trees probably by forming ectomycorrhizae with Korean fir growth and controlling pests and diseases. However, Calocera, Dacrymyces, Gyoerffyella, Hydnotrya, Microdochium, Hyaloscypha, Mycosymbioces, and Podospora were abundant in the dead trees. Our findings suggested that Clavulina, Beauveria, and Tomentella are the major players that could be considered in future reforestation programs to establish ectomycorrhizal networks and promote growth. These genera may have played a significant role in the survival and growth of A. koreana in its natural habitats. In particular, the genus Gyoerffyella may account for the death of the seedlings. Our work presented exploratory research on the specific fungal taxa associated with the status of A. koreana.

16.
Plants (Basel) ; 12(4)2023 Feb 08.
Artículo en Inglés | MEDLINE | ID: mdl-36840113

RESUMEN

Protopanaxadiol (PPD), a gut microbiome-induced ginseng metabolite, has positive immune effects. We previously reported the immune-boosting and anti-inflammatory effects of PPD-enricshed rice seed extracts in normal and inflammatory cell environments, respectively. In the present study, the immunomodulatory activity of PPD-enriched transgenic rice seed extract (DJ-PPD), which exhibited the highest immune-related activity among all available extracts, was compared with that of commercially synthesized 20s-PPD (S-PPD) and natural ginseng root extract (GE), in RAW264.7 cells. Compared with S-PPD and GE treatment, DJ-PPD treatment (i) significantly promoted NF-κB p65 and c-Jun N-terminal protein kinase (JNK) phosphorylation; (ii) upregulated IL-1ß, IL-6, COX-2, TLR-4, and TNF-α expression; (iii) and increased prostaglandin E2 (PGE2) production. However, there were no significant differences in the effects of the three treatments containing PPD-type sapogenin or saponins on nitric oxide (NO) production and phagocytic activity. In the inflammatory cell environment, DJ-PPD treatment markedly decreased the production of LPS-induced inflammatory factors, including NO and PGE2, as well as proinflammatory cytokine expression, by decreasing phosphorylated (p-)NF-κB p65, p-p38 MAPK, and p-JNK levels. Thus, DJ-PPD that does not require complex intestinal microbial processes to exert higher anti-inflammatory effects compared with S-PPD and GE. However, DJ-PPD exerted similar or higher immune-boosting effects (depending on inflammatory biomarkers) than S-PPD and GE. These findings indicate the potential of PPD-enriched transgenic rice as an alternative immunomodulatory agent.

17.
Antioxidants (Basel) ; 12(1)2023 Jan 10.
Artículo en Inglés | MEDLINE | ID: mdl-36671028

RESUMEN

Concerns about hyperpigmentation and skin appearance have led to increasing research into the prevention and altering of skin pigmentation. Natural compounds may be of interest in the search for skin-lightening actives. Protopanaxadiol (PPD), a gut microbiome-induced ginseng metabolite, has been reported to have anti-melanogenic effects. This study aimed to evaluate the antioxidative and anti-melanogenic effects of PPD-enriched rice seed extracts on melan-a cells. The antioxidant and cytotoxicity activities of the extracts were investigated in melan-a cells before measuring their responses to melanogenic activities. The extracts significantly enhanced the antioxidant potency compared with normal rice seed extract. PPD-enriched rice seed extracts (i) significantly downregulated microphthalmia-associated transcription factor, which led to a reduction in tyrosinase and tyrosinase-related protein-1 and -2, (ii) decrease in the cellular tyrosinase activity and melanin content, (iii) reduction in the number of melanin-containing cells, (iv) promotion of melanogenesis downregulators, phosphorylation of extracellular signal-regulated kinase 1/2 and protein kinase B, and (v) downregulation of the phosphorylated p38 mitogen-activated protein kinase and melanin synthesis. These results indicate the feasibility of PPD-enriched rice seed extracts as a novel agent for suppressing melanogenesis and controlling hyperpigmentation.

18.
Pain ; 164(7): 1545-1554, 2023 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-36701124

RESUMEN

ABSTRACT: Mirogabalin, a selective voltage-gated calcium channel α2δ ligand, improves peripheral neuropathic pain; however, its effects on patients with cancers including pancreatic ductal adenocarcinoma (PDAC) remain unknown. We analyzed the effects of mirogabalin on a KPPC ( LSL-KrasG12D/+; Trp53flox/flox; Pdx-1cre/+ ) mouse model of PDAC. Six-week-old KPPC mice received oral mirogabalin (10 mg/kg/day) (n = 10) or vehicle water (n = 14) until the humane end point. Cancer-associated pain was evaluated using the scores of hunching and mouse grimace scale (MGS). Tumor status and plasma cytokine levels were determined using histopathological analysis and cytokine array, respectively. The effects of mirogabalin on the proliferative ability of PDAC cell lines were determined. The scores of the hunching and MGS improved after mirogabalin administration with a decrease in the plasma levels of inflammatory cytokines, such as tumor necrosis factor-α, interleukin-6, and interferon-γ. Although no significant difference in the survival rate was observed, mirogabalin significantly increased pancreatic tumor size and proliferative index of Ki-67 and cyclins. Local arginase-1 + M2-like tumor-associated macrophages and CD31 + tumor blood vessels increased after mirogabalin administration. By contrast, the number of α-smooth muscle actin + cancer-associated fibroblasts, desmoplastic stroma, and CD8 + T cells decreased. Local myeloperoxidase + tumor-associated neutrophils and CD45R + B cells were unaltered. Mirogabalin enhanced the proliferative ability of PDAC cell lines with the upregulation of cyclins and cyclin-dependent kinases; however, it inhibited the potential of pancreatic stellate cells in vitro. Therefore, our results suggest that mirogabalin improves cancer-associated pain but enhances the proliferative potential of PDAC in vitro and in vivo.


Asunto(s)
Dolor en Cáncer , Carcinoma Ductal Pancreático , Neoplasias Pancreáticas , Ratones , Animales , Dolor en Cáncer/tratamiento farmacológico , Dolor en Cáncer/etiología , Neoplasias Pancreáticas/complicaciones , Neoplasias Pancreáticas/tratamiento farmacológico , Carcinoma Ductal Pancreático/complicaciones , Carcinoma Ductal Pancreático/tratamiento farmacológico , Citocinas , Neoplasias Pancreáticas
19.
Pharmaceutics ; 15(8)2023 Aug 11.
Artículo en Inglés | MEDLINE | ID: mdl-37631337

RESUMEN

Ginseng is a traditional medicine with health benefits for humans. Protopanaxadiol (PPD) is an important bioactive compound found in ginseng. Transgenic rice containing PPD has been generated previously. In the present study, extracts of this transgenic rice were evaluated to assess their antiadipogenic and anti-inflammatory activities. During adipogenesis, cells were treated with transgenic rice seed extracts. The results revealed that the concentrations of the rice seed extracts tested in this study did not affect cell viability at 3 days post-treatment. However, the rice seed extracts significantly reduced the accumulation of lipids in cells and suppressed the activation of CCAAT/enhancer-binding protein α (C/EBPα) and peroxisome proliferator-activated receptor γ (PPARγ), which in turn inhibited the expression of adipogenesis-related mRNAs, such as adiponectin, PPARγ, C/EBPα, sterol regulatory element-binding protein 1, glucose transport member 4, and fatty acid synthase. In adipocytes, the extracts significantly reduced the mRNA expression of inflammation-related factors following LPS treatment. The activation of NF-κB p65 and ERK 1/2 was inhibited in extract-treated adipocytes. Moreover, treatment with extract #8 markedly reduced the cell population of the G2/M phase. Collectively, these results indicate that transgenic rice containing PPD may act as an obesity-reducing and/or -preventing agent.

20.
Radiol Oncol ; 46(4): 279-83, 2012 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-23412422

RESUMEN

BACKGROUND.: Subcutaneous panniculitis-like T-cell lymphoma (SPTCL) is a rare form of cutaneous lymphomas, accounting for less than 1% of cases of non-Hodgkin's lymphoma. Fluorine-18 fluorodeoxyglucose (F-18 FDG) positron-emission tomography/computed tomography (PET/CT) findings of SPTCL before and after treatment were rarely reported. CASE REPORT.: We report a case of SPTCL in which F-18 FDG PET/CT showed increased FDG accumulations in numerous subcutaneous nodules without extracutaneous disease. Contrast-enhanced CT during F-18 FDG PET/CT showed multiple minimally enhancing nodules with an infiltrative pattern in the subcutaneous layer throughout the body. Follow-up F-18 FDG PET/CT after three cycles of CHOP chemotherapy showed a complete metabolic remission of the lesions. CONCLUSIONS.: F-18 FDG PET/CT is suggested to be useful in assessing the disease activity, extent and treatment response in SPTCL.

SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA