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1.
Asian J Surg ; 2024 May 31.
Artículo en Inglés | MEDLINE | ID: mdl-38824020

RESUMEN

AIM: This study aimed to investigate the impact of preoperative gallbladder drainage and the specific drainage method used on surgical outcomes in patients undergoing surgery for acute cholecystitis. METHODS: This single-center retrospective cohort study included 221 patients who underwent early cholecystectomy between January 2016 and December 2020. Clinical data and outcomes of 140 patients who did not undergo drainage, 22 patients who underwent preoperative percutaneous transhepatic gallbladder drainage (PTGBD), and 59 patients who underwent preoperative endoscopic naso-gallbladder drainage (ENGBD) were compared. RESULTS: There was no difference in the operation time, blood loss, postoperative complications, or length of postoperative hospital stay between patients who did and did not undergo drainage. Among patients who underwent drainage, there was no difference between the ENGBD and PTGBD groups in operation time, blood loss, or postoperative complications; however, more patients in the PTGBD group underwent laparotomy and had a significantly longer postoperative hospital stay. The presence and type of drainage were not risk factors for postoperative complications. CONCLUSION: The presence or absence of preoperative gallbladder drainage for acute cholecystitis and the type of drainage may not significantly affect surgical outcomes.

2.
Surg Case Rep ; 10(1): 89, 2024 Apr 18.
Artículo en Inglés | MEDLINE | ID: mdl-38635103

RESUMEN

BACKGROUND: Preoperative diagnosis of gallbladder amyloidosis is usually difficult. In our case, the patient exhibited gallbladder dyskinesia, which led us to suspect cholecystic amyloidosis. We were able to safely perform surgery before cholecystitis onset. CASE PRESENTATION: A 59-year-old male patient with a history of multiple myeloma and cardiac amyloidosis presented to our hospital with a chief complaint of epicardial pain. Abdominal ultrasonography and computed tomography revealed an enlarged gallbladder and biliary sludge without any specific imaging findings of cholecystitis. After percutaneous transhepatic gallbladder aspiration (PTGBA), the patient experienced recurrent bile retention and right upper quadrant pain. Flopropione was effective in relieving these symptoms. Based on his symptoms and laboratory findings, we diagnosed the patient with dyskinesia of the gallbladder. Considering his medical history, we suspected that it was caused by amyloidosis of the gallbladder. A laparoscopic cholecystectomy was performed. The histopathological examination showed amyloid deposits in the gallbladder mucosa, from the intrinsic layer to the submucosa, and in the peripheral nerves of the gallbladder neck. The patient was discharged on postoperative day 5 and has had no recurrence of abdominal pain since then. CONCLUSION: In our case, gallbladder dyskinesia symptoms led us to suspect gallbladder amyloidosis. We safely surgically treated the patient before cholecystitis onset.

3.
Surg Case Rep ; 10(1): 45, 2024 Feb 22.
Artículo en Inglés | MEDLINE | ID: mdl-38383872

RESUMEN

BACKGROUND: Goblet cell adenocarcinoma is an extremely rare tumor in which the same cells exhibit both mucinous and neuroendocrine differentiation. It is considered more aggressive compared to conventional carcinoids and more likely to cause metastasis. CASE PRESENTATION: We report a case of goblet cell adenocarcinoma with peritoneal metastases. A 62-year-old man underwent appendectomy for acute appendicitis. Intraoperatively, inflammatory white pus and a small amount of dirty ascites were observed in the lower abdomen with severely inflamed appendix. Histopathological examination of the specimen collected during appendectomy revealed goblet cell adenocarcinoma with a positive surgical margin. One month later, additional ileal resection was planned. Laparoscopic examination revealed disseminated nodules throughout the abdominal cavity. Therefore, the patient underwent resection of the peritoneal nodules. The peritoneal specimens confirmed the histopathological findings. Thus we diagnosed the patient with peritoneal dissemination of appendiceal goblet cell adenocarcinoma. CONCLUSIONS: In cases wherein white pus is observed during surgery for acute appendicitis, considering the possibility of dissemination, collecting samples for histopathological examination, and initiating early treatment are crucial.

4.
Artif Organs ; 48(4): 402-407, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38282554

RESUMEN

BACKGROUND: Due to the increasing demand to generate thick and vascularized tissue-engineered constructs, novel strategies are currently being developed. An effective example is the fabrication of a 3D scaffold containing oxygen-releasing biomaterials to solve the limitations of gas diffusion and transport within transplanted tissues or devices. METHODS: In this study, we developed a biodegradable scaffold made of polycaprolactone (PCL) mixed with oxygen-generating calcium peroxide (CPO) to design new structures for regenerative tissue using a 3D printer capable of forming arbitrarily shapes. RESULTS AND CONCLUSION: When osteoblast progenitor cells (MC3T3-E1 cells) were cultured under hypoxic conditions on scaffolds fabricated with this technique, it was shown that cell death was reduced by the new scaffolds. Therefore, the results suggest that 3D-printed scaffolds made from biodegradable oxygen-releasing materials may be useful for tissue engineering and regeneration.


Asunto(s)
Ingeniería de Tejidos , Andamios del Tejido , Ingeniería de Tejidos/métodos , Andamios del Tejido/química , Oxígeno/metabolismo , Materiales Biocompatibles/química , Poliésteres/química , Cicatrización de Heridas , Impresión Tridimensional
5.
Sci Rep ; 12(1): 7968, 2022 05 13.
Artículo en Inglés | MEDLINE | ID: mdl-35562365

RESUMEN

Disease-suppressive soils exist worldwide. However, the disease-suppression mechanism is unknown, and it's unclear how to produce such soils. The microbiota that develop in a multiple-parallel-mineralization system (MPM) can increase nutrient production efficiency and decrease root disease in hydroponic systems. Artificial media inoculated with MPM microorganisms can degrade organic matter to produce inorganic nutrients similarly to natural soil, but it's unknown whether they can also suppress pathogen growth. Here, we produced an artificial medium that inhibited root disease similarly to disease-suppressive soils. Microbial MPM culture solution was inoculated into non-soil carriers (rockwool, rice husk charcoal, and vermiculite) to test whether it could suppress growth of Fusarium oxysporum f. sp. lactucae J. C. Hubb. & Gerik. We inoculated F. oxysporum f. sp. conglutinans (Wollenweber) Snyder et Hansen strain Cong:11 and F. oxysporum f. sp. lactucae J. C. Hubb. & Gerik into artificial media sown each with Arabidopsis thaliana (L.) Heynh. and Lactuca sativa L. var. capitata supplemented with MPM culture microbes. The MPM microorganisms suppressed F. oxysporum f. sp. lactucae J. C. Hubb. & Gerik growth and prevented plant disease. Thus, MPM-inoculated non-soil carriers that can generate inorganic nutrients from organic matter may also suppress disease in the absence of natural soil. Our study shows novel creation of a disease-suppressive effect in non-soil media using the microbial community from MPM culture solution.


Asunto(s)
Fusarium , Suelo , Enfermedades de las Plantas/prevención & control , Microbiología del Suelo
6.
Clin Exp Nephrol ; 26(8): 750-759, 2022 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-35397690

RESUMEN

BACKGROUND: Although multidisciplinary care (MDC) is necessary for controlling chronic kidney disease (CKD), its impact on compliance with management target values in the CKD guidelines remains unclear. This study was designed to clarify the relationship between compliance with management target values and renal prognosis in CKD outpatients who received MDC. METHODS: There were 255 outpatients with pre-dialysis CKD who received MDC. Achievement rates of systolic, and diastolic blood pressure, hemoglobin, uric acid, low-density lipoprotein cholesterol, and hemoglobin A1c values determined according to CKD guidelines were compared before and 12 months after MDC. In addition, after dividing achievement rates of the target values at 12 months after MDC into four groups (A < 30% ≤ B < 60% ≤ C < 80% ≤ D), dialysis initiation and renal survival rates were compared. RESULTS: There was a significant increase in the overall achievement rate from 62.8 to 69.1% (p < 0.001). The higher the achievement rate after MDC, the lower the dialysis initiation rate (A 72.7%, B 35.3%, C 20.5%, D 8.2%, p < 0.001). There was also a significantly higher renal survival rate (p < 0.001). These findings suggest that MDC for CKD raised awareness of health literacy, and improved the achievement rate of target values. Furthermore, the higher the achievement rate, the later the initiation of dialysis, which led to improvement of renal survival. CONCLUSIONS: MDC can improve compliance with management target values for CKD, suggesting that it may improve renal prognosis.


Asunto(s)
Pacientes Ambulatorios , Insuficiencia Renal Crónica , Progresión de la Enfermedad , Humanos , Grupo de Atención al Paciente , Pronóstico , Insuficiencia Renal Crónica/diagnóstico , Insuficiencia Renal Crónica/terapia
7.
Sci Rep ; 12(1): 785, 2022 01 17.
Artículo en Inglés | MEDLINE | ID: mdl-35039579

RESUMEN

Soil-less substrates are unable to catalyse nitrification because the addition of a high concentration of organic substances suppresses nitrification. We used a previously developed multiple parallel mineralization method, which enables the use of organic fertilizers in hydroponics, to support nitrification in soil-less substrates. In this method, microorganisms immobilized on porous substrates produced inorganic nitrate from organic substances, as in a natural soil. Phosphate and potassium ions were also released. Microorganisms produced nitrate from organic substances when immobilized on polyurethane resin, rockwool, vermiculite, oyster shell lime, and rice husk charcoal. The optimal amount of organic substance added daily to 100 mL of substrate held 6 mg of organic N. The optimal incubation temperature ranged from 25 to 42 °C. A high relative humidity (51% or higher) was more suitable than drier conditions (20%). The optimal amount of fish fertilizer added to the substrate was 6 mg organic N. The lower the C/N ratio of the organic substance, the better the result. Vegetable plants grew well on inoculated substrates but not on uninoculated substrates. These results show that soil-less substrates can be used to create artificial soils in which plants can be grown with the addition of organic fertilizer, as in a natural soil.

8.
Clin Exp Nephrol ; 23(4): 484-492, 2019 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-30341572

RESUMEN

BACKGROUND: Comprehensive education about lifestyle, nutrition, medications and other types of treatment is important to prevent renal dysfunction in patients with chronic kidney disease (CKD). However, the effectiveness of multidisciplinary care on CKD progression has not been evaluated in detail. We aimed to determine whether multidisciplinary care at our hospital could help prevent worsening renal function associated with CKD. METHODS: A total of 150 pre-dialysis CKD outpatients accompanied (n = 68) or not (n = 82) with diabetes mellitus (DM) were enrolled into this study. We assessed annual decreases in estimated glomerular filtration rates (ΔeGFR), and measured systolic blood pressure (SBP), diastolic blood pressure (DBP), hemoglobin (Hb), uric acid (UA), low-density lipoprotein cholesterol (LDL), hemoglobin A1c (HbA1c) values and urinary protein to creatinine ratios (UPCR) 12 months before and after multidisciplinary care. In addition, changes in the number of medications and prescription ratio before and after multidisciplinary care were assessed in 90 patients with CKD who could confirm their prescribed medications. RESULTS: The ΔeGFR significantly improved between before and after multidisciplinary care from - 5.46 to - 0.56 mL/min/1.73 m2/year, respectively. The number of medications and prescription ratio showed no significant changes before and after multidisciplinary care. The ratios of improved ΔeGFR were found in 66.7% of all patients, comprising 63.1% of males and 76.9% of females, 64.8% without DM and 69.4% with DM. Values for UA, LDL, and HbA1c were significantly reduced among patients with improved ΔeGFR. CONCLUSION: Comprehensive multidisciplinary care of outpatients might help prevent worsening renal function among patients with CKD.


Asunto(s)
Grupo de Atención al Paciente , Insuficiencia Renal Crónica/fisiopatología , Insuficiencia Renal Crónica/terapia , Anciano , Anciano de 80 o más Años , Atención Ambulatoria/métodos , Presión Sanguínea , Complicaciones de la Diabetes/sangre , Complicaciones de la Diabetes/complicaciones , Progresión de la Enfermedad , Femenino , Tasa de Filtración Glomerular , Hemoglobina Glucada/metabolismo , Humanos , Lipoproteínas LDL , Masculino , Persona de Mediana Edad , Grupo de Atención al Paciente/organización & administración , Insuficiencia Renal Crónica/complicaciones , Estudios Retrospectivos , Ácido Úrico/sangre
9.
Int J Oncol ; 52(5): 1380-1390, 2018 May.
Artículo en Inglés | MEDLINE | ID: mdl-29512724

RESUMEN

Cancer has long been one of the most malignant diseases worldwide. Processes in cancer cells are often mediated by Jun N-terminal kinase (JNK), p38 mitogen-activated protein kinase (p38 MAPK) and other signaling pathways. Traditional therapies are often problematic. Recently, a novel polysaccharide derived from algae extract was investigated due to the increasing interest in biological activities of compounds from marine organisms. The effect of this novel polysaccharide on human MKN45 gastric carcinoma cells was determined previously. The current aimed to determine whether the polysaccharide affects other types of cancer, and the deeper mechanisms involved in the process. Human MCF-7 breast cancer cells were used to investigate the novel polysaccharide for its role in the cell growth and migration, and determine the mechanisms affected. MTT assay, nuclear staining and fluorescence activated cell sorting analysis demonstrated that the novel polysaccharide reduced the viability of MCF-7 cells by inducing cell apoptosis and arresting the cells at G2/M phase. Results of western blot analysis demonstrated that phosphorylation of JNK and expression of p53, caspase-9 and caspase-3 were upregulated in the polysaccharide-treated MCF-7 cells. SP600125, an inhibitor of JNK, maintained MCF-7 cell viability, prevented cell apoptosis and cycle arrest, and downregulated the polysaccharide-induced protein phosphorylation/expression. However, a migration assay demonstrated that the novel polysaccharide did not change the migration of MCF-7 cells, as well as the expression of p38 MAPK, and matrix metalloproteinase-9 and -2. Taken together, the current study demonstrated that the novel polysaccharide suppressed cancer cell growth, induced cancer cell apoptosis and cell cycle arrest via JNK signaling, but had no effect on cancer cell migration and p38 MAPK signaling.

10.
Genome Announc ; 5(11)2017 Mar 16.
Artículo en Inglés | MEDLINE | ID: mdl-28302768

RESUMEN

Rhizobium sp. strain TBD182, isolated from a novel hydroponics system, is an antagonistic bacterium that inhibits the mycelial growth of Fusarium oxysporum but does not eliminate the pathogen. We report the draft genome sequence of TBD182, which may contribute to elucidation of the molecular mechanisms of its fungistatic activity.

11.
Pediatr Int ; 59(6): 714-719, 2017 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-28164411

RESUMEN

BACKGROUND: Improvements in neonatal medicine and pediatric emergency medicine have led to an increasing number of children with severe disabilities requiring medical care, such as tracheal suction, on a daily basis. Most of these children, discharged directly from hospitals to their parents' homes, need home medical support. To provide data for the establishment of appropriate support systems, we analyzed the care for such children in a time study conducted at an institution. METHODS: A minute-by-minute time study of the work of 33 staff members in a ward for patients (medically dependent severe motor and intellectual disabilities [SMID]) requiring frequent medical care was carried out over 48 h. Data were compared with those from a ward for ordinary non-medically dependent SMID patients. RESULTS: Time of life care for medically dependent SMID and ordinary SMID was almost identical, but the time for medical care for the former was 10-fold longer than that of the latter. Also, tasks involving information exchange and recording of the time of care were performed fourfold more frequently in the medically dependent SMID than in the ordinary SMID ward. CONCLUSIONS: Medically dependent SMID children and adults, predominantly with tracheostomies, needed much more medical care and more concentrated involvement of the staff compared with ordinary SMID. This study provides valuable data for the development of support systems for medically dependent SMID children being cared for at home. In addition, it sheds light on the situation faced by non-SMID children requiring frequent medical care.


Asunto(s)
Discapacidad Intelectual/terapia , Trastornos Motores/terapia , Atención al Paciente/estadística & datos numéricos , Adolescente , Adulto , Niño , Preescolar , Femenino , Servicios de Atención de Salud a Domicilio , Humanos , Masculino , Persona de Mediana Edad , Evaluación de Necesidades , Índice de Severidad de la Enfermedad , Instituciones de Cuidados Especializados de Enfermería , Factores de Tiempo , Estudios de Tiempo y Movimiento , Adulto Joven
12.
Int J Oncol ; 49(4): 1561-1568, 2016 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-27633119

RESUMEN

In recent years, interest in biological activities of compounds from marine organisms has intensified. Cancer is the most principal enemy for human life and health. For the first time, to the best of our knowledge, we investigated a novel algae-derived polysaccharide for its role in inducing apoptosis and cell cycle arrest in human gastric carcinoma MKN45 cells. We found that the novel polysaccharide suppressed MKN45 cell proliferation, induced cell apoptosis and arrested the cells at G2/M phase. Furthermore, we observed that the generation of reactive oxygen species (ROS) and the phosphorylation of Jun N-terminal kinase (JNK), p53, caspase-9 and -3 were induced in the polysaccharide-treated MKN45 cells. In addition, pretreatment with N-acetyl-cysteine (NAC) and SP600125, the inhibitor of ROS and JNK, induced MKN45 cell proliferation, prevented the cell apoptosis and released the cells from cycle arrest. Finally, we found that pretreatment with NAC prevented the JNK, p53, caspase-9 and -3 protein phosphorylation induced by the polysaccharide, however, pretreatment with SP600125 did not affect the generation of ROS, suggesting that ROS is upstream of JNK. Taken together, the novel polysaccharide induced cancer cell apoptosis and arrested cell cycle via ROS/JNK signaling pathway.

13.
Biosci Biotechnol Biochem ; 80(11): 2247-2254, 2016 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-27351990

RESUMEN

Nitrifying microbial consortia were enriched from bark compost in a water system by regulating the amounts of organic nitrogen compounds and by controlling the aeration conditions with addition of CaCO3 for maintaining suitable pH. Repeated enrichment showed reproducible mineralization of organic nitrogen via the conversion of ammonium ions ( ) and nitrite ions ( ) into nitrate ions ( ). The change in microbial composition during the enrichment was investigated by PCR-DGGE analysis with a focus on prokaryote, ammonia-oxidizing bacteria, nitrite-oxidizing bacteria, and eukaryote cell types. The microbial transition had a simple profile and showed clear relation to nitrogen ions transition. Nitrosomonas and Nitrobacter were mainly detected during and oxidation, respectively. These results revealing representative microorganisms acting in each ammonification and nitrification stages will be valuable for the development of artificial simple microbial consortia for organic hydroponics that consisted of identified heterotrophs and autotrophic nitrifying bacteria.

14.
Water Sci Technol ; 73(8): 1872-81, 2016.
Artículo en Inglés | MEDLINE | ID: mdl-27120642

RESUMEN

Recently, we developed two new Fenton catalysts using iron (Fe) and spent tea leaves or coffee grounds as raw material. In this study, Fe-to-tea or Fe-to-coffee polyphenol complexes were successfully tested as heterogeneous photo-Fenton catalysts. The photodegradation efficiency of methylene blue solutions with Fe-to-polyphenol complexes was higher than that of homogeneous iron salts in the photo-Fenton process. Furthermore, the tested Fe-to-polyphenol complexes could be reused by simply adding H2O2 to the solutions. After three sequential additions of H2O2, the conventional catalysts FeCl2·4H2O and FeCl3 removed only 16.6% and 53.6% of the dye, while the catalysts made using spent coffee grounds and tea leaves removed 94.4% and 96.0% of the dye, respectively. These results showed that the complexes formed between Fe and chlorogenic acid, caffeic acid, gallic acid and catechin, which are the main polyphenols in tea and coffee, can be used to improve the photo-Fenton process.


Asunto(s)
Camellia sinensis/química , Coffea/química , Hierro/química , Azul de Metileno/química , Fotólisis , Polifenoles/química , Catálisis , Ácido Gálico , Peróxido de Hidrógeno , Eliminación de Residuos Líquidos , Agua/química , Contaminantes Químicos del Agua
15.
Biomed Res Int ; 2015: 859456, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-26504839

RESUMEN

Porous ceramic scaffolds with shapes matching the bone defects may result in more efficient grafting and healing than the ones with simple geometries. Using computer-assisted microstereolithography (MSTL), we have developed a novel gelcasting indirect MSTL technology and successfully fabricated two scaffolds according to CT images of rabbit femur. Negative resin molds with outer 3D dimensions conforming to the femur and an internal structure consisting of stacked meshes with uniform interconnecting struts, 0.5 mm in diameter, were fabricated by MSTL. The second mold type was designed for cortical bone formation. A ceramic slurry of beta-tricalcium phosphate (ß-TCP) with room temperature vulcanization (RTV) silicone as binder was cast into the molds. After the RTV silicone was completely cured, the composite was sintered at 1500°C for 5 h. Both gross anatomical shape and the interpenetrating internal network were preserved after sintering. Even cortical structure could be introduced into the customized scaffolds, which resulted in enhanced strength. Biocompatibility was confirmed by vital staining of rabbit bone marrow mesenchymal stromal cells cultured on the customized scaffolds for 5 days. This fabrication method could be useful for constructing bone substitutes specifically designed according to local anatomical defects.


Asunto(s)
Huesos/citología , Fosfatos de Calcio/química , Impresión Tridimensional , Ingeniería de Tejidos/métodos , Andamios del Tejido/química , Animales , Células Cultivadas , Humanos , Procesamiento de Imagen Asistido por Computador , Células Madre Mesenquimatosas/citología , Microtecnología , Conejos , Microtomografía por Rayos X
16.
Pediatr Int ; 57(6): 1154-8, 2015 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-25980787

RESUMEN

BACKGROUND: In Japan, improvement in the care for institutionalized patients with severe motor and intellectual disabilities (SMID) has resulted in improved prognosis compared with previous decades, leading to difficulty in entering institutions because of the limited capacity. In recent years, new SMID patients discharged mostly from neonatal intensive care units receive care in their parents' homes rather than in institutions. In order to effect this change, an assessment of patient care in both an institutional and home environment is of utmost importance. METHODS: We performed a minute-by-minute time study of the work of staff members (n = 31) in a ward in an institution for SMID (31 patients with no ventilators) over 48 h in order to reconstruct patient care. RESULTS: Significant differences were found between the entirely immobile group (n = 15) and semi-mobile group (n = 13) in the area of total care time (124.6 vs 83.4 min/day, respectively, P = 0.003) and non-medical care time (99.1 vs 69.0 min/day, P = 0.003). Nurses (16 in total) did twice as many tasks as other staff members in the areas of medical care and general care management. The number of tasks was the same for nurses and other staff members in the areas of non-medical care and social participation/others. CONCLUSION: Patient care undertaken by medical professionals in the areas of both ordinary care as well as medical care seemed to have contributed to improved prognosis in SMID patients. This study demonstrates the essential nature of nursing care for SMID patients living in institutions and at home.


Asunto(s)
Discapacidad Intelectual/epidemiología , Trastornos Motores/epidemiología , Psicometría/métodos , Estudios de Tiempo y Movimiento , Femenino , Estudios de Seguimiento , Humanos , Discapacidad Intelectual/diagnóstico , Japón/epidemiología , Masculino , Persona de Mediana Edad , Morbilidad/tendencias , Trastornos Motores/diagnóstico , Índice de Severidad de la Enfermedad
17.
J Sci Food Agric ; 94(11): 2317-23, 2014 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-24403175

RESUMEN

BACKGROUND: Recent reports indicate that organic fertilisers have a suppressive effect on the pathogens of plants grown under hydroponic systems. Furthermore, microorganisms exhibiting antagonistic activity to diseases have been observed in organic hydroponic systems. This study evaluated the effect of corn steep liquor (CSL) on controlling lettuce root rot disease [Fusarium oxysporum f.sp. lactucae (FOL)] in a hydroponic system. The effect of CSL and Otsuka A (a chemical fertiliser) on the inhibition of FOL in terms of mycelial growth inhibition was tested in vivo. RESULTS: Addition of CSL suppressed FOL infection rates. CSL inhibited FOL infection by 26.3-42.5% from 2 days after starting incubation. In comparison, Otsuka A inhibited FOL growth by 5.5-19.4%. In addition, four of 10 bacteria isolated from the nutrient media containing CSL exhibited inhibition zones preventing FOL mycelial growth. CONCLUSIONS: We found that CSL suppressed FOL in lettuce via its antifungal and biostimulatory effects. We suggest that activation of beneficial microorganisms present in CSL may be used to decrease lettuce root rot disease and contribute to lettuce root growth.


Asunto(s)
Antifúngicos/farmacología , Fusarium/efectos de los fármacos , Lactuca/efectos de los fármacos , Enfermedades de las Plantas/microbiología , Preparaciones de Plantas/farmacología , Raíces de Plantas/efectos de los fármacos , Zea mays , Bacterias/aislamiento & purificación , Medios de Cultivo , Fertilizantes , Fusarium/crecimiento & desarrollo , Hidroponía , Lactuca/crecimiento & desarrollo , Lactuca/microbiología , Micelio/crecimiento & desarrollo , Control Biológico de Vectores , Raíces de Plantas/crecimiento & desarrollo , Raíces de Plantas/microbiología
18.
Microbiologyopen ; 2(6): 997-1009, 2013 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-24311557

RESUMEN

The rhizosphere microbial community in a hydroponics system with multiple parallel mineralization (MPM) can potentially suppress root-borne diseases. This study focused on revealing the biological nature of the suppression against Fusarium wilt disease, which is caused by the fungus Fusarium oxysporum, and describing the factors that may influence the fungal pathogen in the MPM system. We demonstrated that the rhizosphere microbiota that developed in the MPM system could suppress Fusarium wilt disease under in vitro and greenhouse conditions. The microbiological characteristics of the MPM system were able to control the population dynamics of F. oxysporum, but did not eradicate the fungal pathogen. The roles of the microbiological agents underlying the disease suppression and the magnitude of the disease suppression in the MPM system appear to depend on the microbial density. F. oxysporum that survived in the MPM system formed chlamydospores when exposed to the rhizosphere microbiota. These results suggest that the microbiota suppresses proliferation of F. oxysporum by controlling the pathogen's morphogenesis and by developing an ecosystem that permits coexistence with F. oxysporum.


Asunto(s)
Fenómenos Fisiológicos Bacterianos , Biota , Fusarium/crecimiento & desarrollo , Interacciones Microbianas , Enfermedades de las Plantas/prevención & control , Rizosfera , Microbiología del Suelo , Solanum lycopersicum/microbiología , Datos de Secuencia Molecular , Enfermedades de las Plantas/microbiología , Análisis de Secuencia de ADN
19.
Biochem Biophys Res Commun ; 434(3): 492-7, 2013 May 10.
Artículo en Inglés | MEDLINE | ID: mdl-23583371

RESUMEN

Heme oxygenase-1 (HO-1) plays an important role in the vasculature and in the angiogenesis of tumors, wounds and other environments. Retinal pigment epithelial (RPE) cells and choroidal endothelial cells (CECs) are the main cells involved in choroidal neovascularization (CNV), a process in which hypoxia plays an important role. Our aim was to evaluate the role of human RPE-cell HO-1 in the angiogenic activities of cocultured endothelial cells under hypoxia. Small interfering RNA (siRNA) for HO-1 was transfected into human RPE cell line ARPE-19, and zinc protoporphyrin (ZnPP) was used to inhibit HO-1 activity. Knockdown of HO-1 expression and inhibition of HO-1 activity resulted in potent reduction of the expression of vascular endothelial growth factor (VEGF) under hypoxia. Furthermore, knockdown of HO-1 suppressed the proliferation, migration and tube formation of cocultured endothelial cells. These findings indicated that HO-1 might have an angiogenic effect in CNV through modulation of VEGF expression and might be a potential target for treating CNV.


Asunto(s)
Movimiento Celular , Proliferación Celular , Silenciador del Gen , Hemo-Oxigenasa 1/genética , Epitelio Pigmentado de la Retina/enzimología , Secuencia de Bases , Western Blotting , Línea Celular , Técnicas de Cocultivo , Cartilla de ADN , Humanos , Reacción en Cadena de la Polimerasa , ARN Interferente Pequeño/genética , Epitelio Pigmentado de la Retina/citología
20.
Biol Pharm Bull ; 35(9): 1447-53, 2012.
Artículo en Inglés | MEDLINE | ID: mdl-22975494

RESUMEN

Diabetic retinopathy is a common complication of diabetes mellitus (DM). The oxidative damage inflicted on retinal pigment epithelial (RPE) cells by high glucose closely approximates the molecular basis for the loss of vision associated with this disease. We investigate a novel algae-derived polysaccharide compound for its role in protecting ARPE-19 cells from high glucose-induced oxidative damage. ARPE-19 cells were cultured for 4 d with normal concentration of D-glucose, and exposed to either normal or high concentrations of D-glucose in the presence or absence of the polysaccharide compound at variety of concentrations for another 48 h. Taurine was used as a positive control. Activity of super oxide dismutase (SOD) and concentration of glutathione (GSH) were measured as well as cytotoxicity of high glucose and the polysaccharide compound. To analyse cellular damage by high glucose, activation of Annexin V and p38 mitogen-activated protein kinase (MAPK) and extracellular signal-regulated kinase (ERK) were examined. Our results showed that a significant cellular damage on ARPE-19 cells after 48 h treatment with high glucose, accompanied by a decrease in SOD activity and GSH concentration; high glucose also caused ARPE-19 cell apoptosis and activation of p38MAPK and ERK. As the non-toxic polysaccharide compound protected ARPE-19 cells from high glucose-induced cellular damage, the compound recovered SOD activity and concentration of GSH in the cells. The compound also abrogated the cell apoptosis and activation of p38MAPK and ERK. Therefore, the polysaccharide compound derived from algae extracts could be unique candidate for a new class of anti-DM and anti-oxidative damage.


Asunto(s)
Antioxidantes/farmacología , Retinopatía Diabética/metabolismo , Glucosa/efectos adversos , Estrés Oxidativo/efectos de los fármacos , Phaeophyceae/química , Polisacáridos/farmacología , Epitelio Pigmentado de la Retina/efectos de los fármacos , Antioxidantes/metabolismo , Apoptosis/efectos de los fármacos , Línea Celular , Retinopatía Diabética/inducido químicamente , Activación Enzimática/efectos de los fármacos , Células Epiteliales/efectos de los fármacos , Células Epiteliales/metabolismo , Quinasas MAP Reguladas por Señal Extracelular/metabolismo , Glutatión/metabolismo , Humanos , Fitoterapia , Extractos Vegetales/farmacología , Epitelio Pigmentado de la Retina/citología , Epitelio Pigmentado de la Retina/metabolismo , Superóxido Dismutasa/metabolismo , Proteínas Quinasas p38 Activadas por Mitógenos/metabolismo
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