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1.
Heliyon ; 10(6): e27427, 2024 Mar 30.
Artículo en Inglés | MEDLINE | ID: mdl-38501008

RESUMEN

Background: The predominant feature of cancer cells during the process of carcinogenesis is the inclination towards glycolytic metabolism rather than mitochondrial oxidative phosphorylation. Nevertheless, there is a scarcity of research investigating the correlation between bladder cancer and mitochondrial energy metabolism. Methods: A qPCR array comprising 90 genes associated with mitochondrial oxidative phosphorylation was employed to discern metabolic disparities between three sets of bladder cancer tissue and adjacent normal tissue. Wound healing and transwell assays were utilized to assess cell migration and invasion capabilities, respectively. Colony formation assays were conducted to ascertain the tumorigenic potential of the cells. The proliferative capacity of the cells was examined through in vitro CCK-8 assays. Additionally, nude mouse models were established to evaluate the impact of bladder tumor cells on in vivo proliferation. The Seahorse XFe96 Analyzer was utilized to quantify mitochondrial oxidative phosphorylation, while the levels of glucose-6-phosphate and pyruvate were assessed to evaluate glycolysis. Results: Examination of qPCR array data demonstrated a noteworthy inhibition of mitochondrial oxidative phosphorylation in bladder cancer tissue, as evidenced by the down-regulation of a majority of genes associated with mitochondrial energy metabolism. Notably, GADD45B may potentially exert a significant influence on bladder cancer development, warranting further investigation. The down-regulation of GADD45B in bladder cancer cells resulted in impaired mitochondrial respiration and elevated levels of glycolysis, thereby enhancing cell migration and invasion. Conversely, up-regulation of GADD45B had the opposite effect. Furthermore, over-expression of GADD45B inhibited tumor proliferation and tumorigenesis in both in vitro and in vivo settings. Conclusion: These findings from our study indicate that the down-regulation of GADD45B promotes the shift of cell mitochondrial oxidative phosphorylation towards glycolysis, thereby facilitating the progression of bladder cancer.

2.
Sci Rep ; 13(1): 16496, 2023 10 01.
Artículo en Inglés | MEDLINE | ID: mdl-37779109

RESUMEN

Prostaglandin I2 synthase (PTGIS) is a member of the cytochrome P450 family. Studies have revealed that differential expression of the PTGIS gene is closely related to the pathological and physiological processes of many diseases, including breast cancer, oral squamous cell carcinoma, and head and neck cancer. However, the mechanism of action of the PTGIS gene in colorectal cancer is not fully understood. This study explored the role of PTGIS in colorectal cancer through comprehensive bioinformatics analysis and in vitro experiments, and found that the expression of PTGIS gene in colorectal cancer tissue was significantly lower than that in normal colorectal tissue (P < 0.05), and high expression of PTGIS gene was associated with poor prognosis in patients (P < 0.05). The KEGG results showed that PTGIS-related genes were mainly enriched in metabolic pathways, arachidonic acid metabolism, steroid biosynthesis, and cancer pathways. The expression of PTGIS may be related to immune infiltration. Cell experiments showed that PTGIS was expressed at a lower level in cancer. Overexpression of PTGIS inhibited apoptosis and promoted proliferation, invasion, and migration ability of SW480 colorectal cancer cells. Analysis of the PTGIS gene in this study provides a theoretical basis for further exploring the pathogenesis of colorectal cancer and finding more accurate new targets for early screening and treatment of the cancer.


Asunto(s)
Carcinoma de Células Escamosas , Neoplasias Colorrectales , Neoplasias de Cabeza y Cuello , Neoplasias de la Boca , Humanos , Neoplasias Colorrectales/patología , Sistema Enzimático del Citocromo P-450/genética , Biología Computacional
3.
J Clin Lab Anal ; 36(4): e24332, 2022 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-35257419

RESUMEN

BACKGROUND: Although the phosphorylation of 4E-BP1 that has been detected in high-grade prostate cancer has been reported in previous studies, overexpression of p4E-BP1 and 4EBP1 and their clinical significance in prostate cancer still remain unknown. METHODS: One hundred six samples of prostate tissues were collected and analyzed by immunohistochemistry with p4E-BP1 or 4E-BP1 specific antibodies. Everolimus was used to block the phosphorylation of p4E-BP1, and then flow cytometry, clone formation, transwell, and wound healing assays were performed to detect the survival and invasive ability of the prostate cancer cells. RESULTS: We found that the expression of 4E-BP1 and p4E-BP1 was higher in prostate cancer tissues than in normal tissues. Interestingly, the expression of p4E-BP1 was significantly associated with Gleason score and lymph node metastasis, but had no obvious correlation with PSA and the presence of bone or visceral metastasis. However, no evident correlation was found between the positive expression of 4E-BP1 and these clinical characteristics. In in vitro experiments, we found similar results as the clinical presentation that 4E-BP1 and p4E-BP1 were low expressed in normal prostate epithelial cells, but in prostate cancer cells, as the malignancy increasing, 4E-BP1 and p4E-BP1 expression also gradually increased. Then, we used Everolimus to inhibit the phosphorylation of 4E-BP1 and found that Everolimus effectively reduced cloning formation, inhibited cell migration, and promoted apoptosis in a dose-dependent manner in PC3 cells. CONCLUSIONS: These findings suggest that p4E-BP1 is a potential biomarker and therapy target for prostate cancer, and patients with high expressions of p4E-BP1 may benefit from Everolimus treatment.


Asunto(s)
Everolimus , Neoplasias de la Próstata , Everolimus/farmacología , Humanos , Inmunohistoquímica , Masculino , Fosfoproteínas , Fosforilación
4.
Ther Adv Urol ; 13: 1756287221993300, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33708261

RESUMEN

Treatment of urolithiasis depends on several important factors which include stone location, size, composition, and patient symptoms. Although significant advancements have been made in the surgical management of urolithiasis in the last decade, pharmacotherapy which can prevent the formation of new stones and decrease the recurrence of urolithiasis has not experienced the same level of success. Currently, urolithiasis is regarded as a complicated syndrome that is determined by numerous factors, and any treatment plan for urolithiasis should be individualized while considering any potential damage arising from stone-forming factors. This review introduces the most popular methods currently used to evaluate urolithiasis and the pharmacotherapy of urolithiasis based on patient-specific factors.

5.
Oxid Med Cell Longev ; 2021: 8840590, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33532038

RESUMEN

Renal cell carcinoma (RCC) is a tumor with unpredictable presentation and poor clinical outcome. RCC is always resistant to chemotherapy and radiation, and weakly sensitive to immunotherapeutic agents. Therefore, novel agents and approaches are urgently needed for the treatment of RCC. Emodin, an anthraquinone compound extracted from rhubarb and other traditional Chinese herbs, has been implicated in a wide variety of pharmacological effects, such as anti-inflammatory, antiviral, and antitumor activities. However, its role in RCC remains unknown. In this study, we found that emodin effectively killed renal cancer cells without significant toxicity to noncancerous cell HK-2. Flow cytometry assay with Annexin V-FITC and PI demonstrated that emodin induces necroptosis, but not apoptosis, in renal cancer cells. Meanwhile, the phosphorylation levels of RIP1 and MLKL, the key necroptosis-related proteins, were significantly increased. To explore how emodin inhibits kidney tumor growth, we tested reactive oxygen species (ROS) levels and found that the levels of ROS increased upon emodin treatment in a dose-dependent manner. Further studies demonstrated that emodin induces necroptosis through ROS-mediated activation of JNK signaling pathway and also inhibits glycolysis by downregulation of GLUT1 through ROS-mediated inactivation of the PI3K/AKT signaling pathway. Our findings revealed the potential mechanisms by which emodin suppresses renal cancer cell growth and will help develop novel therapeutic approaches for patients with JNK- or PI3K/AKT-dysregulated renal cancer.


Asunto(s)
Carcinoma de Células Renales , Emodina/farmacología , Glucólisis/efectos de los fármacos , Neoplasias Renales , Necroptosis/efectos de los fármacos , Carcinoma de Células Renales/metabolismo , Carcinoma de Células Renales/patología , Línea Celular Tumoral , Supervivencia Celular/efectos de los fármacos , Humanos , Neoplasias Renales/metabolismo , Neoplasias Renales/patología , Sistema de Señalización de MAP Quinasas/efectos de los fármacos , Especies Reactivas de Oxígeno/metabolismo , Transducción de Señal/efectos de los fármacos
6.
Ann Palliat Med ; 10(2): 1438-1444, 2021 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-33081478

RESUMEN

BACKGROUND: Prostate cancer is the most common type of malignancy in elderly men. Although elderly patients are commonly encountered in clinical practice, few studies have focused on the value of chemotherapy in elderly patients. In this study, we reviewed the use of docetaxel with prednisolone in elderly men (aged ≥80 years) with metastatic castration-resistant prostate cancer (mCRPC) at Ningbo First Hospital with a focus on efficacy and toxicity. METHODS: A retrospective study including a series of men aged ≥80 years with mCRPC and received docetaxel plus prednisone chemotherapy between August 2011 and May 2019. All these cases were selected from the Ningbo First Hospital prostate cancer database located in Zhejiang Province, China. RESULTS: Sixteen patients were identified, with a mean age of 82 years (range, 80 to 87 years). All patients have received a median of four and half cycles (range, 1-10) of 3-week (60-75 mg/m2 ) docetaxel regimens and 5 mg prednisone twice per day. Seven (43.75%) patients completed more than six cycles. Ten (62.50%) patients had a good prostate-specific antigen (PSA) response of ≥50% decline. Eight (50.00%) patients had ostealgia before receiving docetaxel treatment and six of them (75.00%) experienced reduced pain after the treatment. Hematologic toxicity was observed in six (37.50%) patients with neutropenia, one of which was diagnosed with agranulocytosis and had to be admitted for the same reason. Other adverse reactions such as fever, debilitation, and alopecia were also observed. CONCLUSIONS: Very elderly patients (aged ≥80 years) with mCRPC are easy to be neglected and infrequently involved in clinical trials. Our study demonstrates that docetaxel chemotherapy plus prednisone is tolerable and effective among Chinese elderly patients (≥80 years) with mCRPC. Docetaxel chemotherapy may be given under careful surveillance even in frail elderly patients.


Asunto(s)
Neoplasias de la Próstata Resistentes a la Castración , Anciano , Anciano de 80 o más Años , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , China , Docetaxel/efectos adversos , Humanos , Masculino , Prednisolona/efectos adversos , Prednisona/efectos adversos , Neoplasias de la Próstata Resistentes a la Castración/tratamiento farmacológico , Estudios Retrospectivos , Resultado del Tratamiento
7.
Front Oncol ; 10: 1720, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32984054

RESUMEN

BACKGROUND: The receptor-interacting protein kinase 3 (RIP3/RIPK3) was recently found to be a critical regulator of programmed necrosis/necroptosis. However, the biological role and clinical significance of RIP3 in prostate cancer remain obscure. METHODS: Western blotting and QRT-PCR were performed to detect the level of RIP3 in prostate cancer cells. Fixed cancer tissue and normal tissue specimens were subjected to immunohistochemical analysis of RIP3. Cell migration and invasion abilities were evaluated by transwell assays. In vitro proliferative ability was examed by MTS. And in vivo nude mice model were used to evaluate the effect of RIP3 ectopic expression on proliferative capability. Cell cycle of prostate cancer cells were analyzed by flow cytometry. Changes in some related proteins caused by RIP3 overexpression were explored using Western blotting. RESULTS: RIP3 was significantly down-regulated in prostate cancer cell lines and clinical prostate tumor samples. And over-expressing RIP3 suppressed the migration and invasion of prostate cancer cells. Two important matrix metalloproteinases MMP2, MMP9 which enables the destruction of the histological barrier of tumor cell invasion and three mesenchymal markers Vimentin, fibronectin, and N-cadherin were under-expressed due to the overexpression of RIP3, but the E-cadherin level which is the epithelial marker was increased. Furthermore, our results also showed that RIP3 can inhibit the proliferation and tumorigenicity of prostate cancer cells both in vitro and in vivo by phosphorylating MLKL, which were reversed by MLKL inhibitor treatment, indicating that necroptosis was involved in cell death. CONCLUSION: Taken together, these findings indicated that RIP3 is responsible for the progression of prostate cancer, suggesting that RIP3 might have the potential to be a prognostic marker or a therapeutic target against prostate cancer.

8.
Exp Ther Med ; 19(4): 2627-2631, 2020 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-32256743

RESUMEN

The present study investigated the use of retrograde flexible ureteroscopy (RFU) in the discrimination of the etiology of hematuria that originates from the upper urinary tract (UUT). The present study collected retrospective data for patients who presented with hematuria and cystoscopy-detected bleeding from the UUT between June 2006 and August 2018 in Ningbo First Hospital. All patients accepted RFU to determine the etiology of hematuria. Data regarding imaging examinations, surgery, pathology and complications were also collected and analyzed. In total, 65 patients (males, 38; females, 27) with a mean age of 63 years underwent RFU to determine the etiology of hematuria originating from the UUT. Using RFU, UUT tumors were found in 29 cases. Stones, polyps and atypical hyperplasia were found in two cases, and a definite diagnosis was not found in three cases. There were 17 cases without obvious abnormalities and nine cases were unable to undergo RFU due to ureteral stenosis. In patients who could not be diagnosed by imaging examination, 34.4% (11/32) were diagnosed with urothelial carcinoma by RFU, and these results were also confirmed by postoperative pathology. In the present study, no patient had severe complications after RFU. The present results suggested RFU may be used as a sensitive method to diagnose UUT tumors (78.4%; 29/37) and has strong specificity. RFU could be performed as a routine examination for patients with hematuria from the UUT.

9.
Eur J Clin Microbiol Infect Dis ; 38(5): 967-971, 2019 May.
Artículo en Inglés | MEDLINE | ID: mdl-30919151

RESUMEN

To develop an optimal prophylactic regimen among Chinese patients who accept transrectal prostate biopsy. We enrolled 420 patients who accepted transrectal prostate biopsy. They were randomly classified into three groups (n = 140 for each): Group A received a single 500-mg tablet of levofloxacin without enema; group B received a single 500-mg tablet of levofloxacin plus enema; group C received 3-day levofloxacin orally plus enema. Patients were assessed if they had a febrile urinary tract infection (FUTI). The incidence of FUTI was compared among groups. Subgroup analysis was performed between patients at high and low risk of infection in each group. There were 15 cases developed FUTI: 7 (5%), 6 (4.3%), and 2 (1.4%), respectively, in groups A, B, and C. Of the 15 patients who developed FUTI, Escherichia coli was detected in blood culture in two cases. Urine culture results were all negative. FUTI patients (73.3% (11/15)) had at least one high risk factor. Subgroup analysis showed that the incidence of FUTI in group A was significantly higher than that in group C among high-risk patients. There was no statistical difference between group A and group B among both high- and low-risk patients. A single 500-mg dose of levofloxacin without enema represents excellent prophylaxis for transrectal prostate biopsy in Chinese patients at low risk of infection. For those at high risk, 3-day levofloxacin prophylaxis is the optimal regimen. Prebiopsy enema provides no clinically significant outcome advantage and is unnecessary.


Asunto(s)
Antibacterianos/administración & dosificación , Profilaxis Antibiótica/métodos , Levofloxacino/administración & dosificación , Próstata/cirugía , Infecciones Urinarias/prevención & control , Adulto , Anciano , Anciano de 80 o más Años , Biopsia con Aguja , China/epidemiología , Enema , Humanos , Biopsia Guiada por Imagen , Incidencia , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Próstata/diagnóstico por imagen , Próstata/patología , Factores de Riesgo , Infecciones Urinarias/epidemiología , Infecciones Urinarias/microbiología
10.
J Econ Entomol ; 108(4): 1978-85, 2015 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-26470343

RESUMEN

The diamondback moth, Plutella xylostella (L.), is considered one of the most damaging lepidopteran pests, and it has developed resistance to all conventional insecticide classes in the field. Chlorantraniliprole is the first commercial insecticide that belongs to the new chemical class of diamide insecticides. But, P. xylostella have already shown resistance to chlorantraniliprole in China. After 52 generations of selection with chlorantraniliprole, ∼48.17-fold resistance was observed. The resistant strain showed cross-resistance to flubendiamide (7.29-fold), abamectin (6.11-fold), and cyantraniliprole (3.31-fold). Quantitative real-time polymerase chain reaction analysis showed that the expression of the ryanodine receptor gene was higher in the resistant strain than that in the susceptible strain. Enzyme assays indicated that cytochrome P450 activity in the resistant strain was 4.26 times higher compared with the susceptible strain, whereas no difference was seen for glutathione-S-transferase and esterase. Moreover, the toxicity of chlorantraniliprole in the resistant strain could be synergized by piperonyl butoxide, but not by diethyl maleate, and S,S,S-tributyl phosphorothioate. These results can serve as an important base for guiding the use of insecticide in field and delaying the development of pests that are resistant to the insecticides.


Asunto(s)
Resistencia a los Insecticidas , Insecticidas/farmacología , Mariposas Nocturnas/efectos de los fármacos , ortoaminobenzoatos/farmacología , Animales , Proteínas de Insectos/genética , Proteínas de Insectos/metabolismo , Larva/efectos de los fármacos , Mariposas Nocturnas/genética , Mariposas Nocturnas/crecimiento & desarrollo
11.
Ying Yong Sheng Tai Xue Bao ; 25(2): 408-18, 2014 Feb.
Artículo en Chino | MEDLINE | ID: mdl-24830240

RESUMEN

During the growing season of 2011, the leaf photosynthesis, morphological and growth traits of Phragmites australis and Imperata cylindrica were investigated along a gradient of water table (low, medium and high) in the reclaimed tidal wetland at the Dongtan of Chongming Island in the Yangtze Estuary of China. A series of soil factors, i. e., soil temperature, moisture, salinity and inorganic nitrogen content, were also measured. During the peak growing season, leaf photosynthetic capacity of P. australis in the wetland with high water table was significantly lower than those in the wetland with low and medium water tables, and no difference was observed in leaf photosynthetic capacity of I. cylindrica at the three water tables. During the entire growing season, at the shoot level, the morphological and growth traits of P. australis got the optimum in the wetland with medium water table, but most of the morphological and growth traits of I. cylindrica had no significant differences at the three water tables. At the population level, the shoot density, leaf area index and aboveground biomass per unit area were the highest in the wetland with high water table for P. australis, but all of the three traits were the highest in the wetland with low water table for I. cylindrica. At the early growing season, the rhizome biomass of P. australis in the 0-20 cm soil layer had no difference at the three water tables, and the rhizome biomass of I. cylindrica in the 0-20 cm soil layer in the wetland with high water table was significantly lower than those in the wetland with low and medium water table. As a native hygrophyte before the reclamation, the variations of performances of P. australis at the three water tables were probably attributed to the differences in the soil factors as well as the intensity of competition from I. cylindrica. To appropriately manipulate water table in the reclaimed tidal wetland may restrict the growth and propagation of the mesophyte I. cylindrica, and facilitate the restoration of P. australis-dominated marsh plant community.


Asunto(s)
Agua Subterránea , Fotosíntesis , Poaceae/fisiología , Humedales , Biomasa , China , Estuarios , Islas , Nitrógeno/análisis , Hojas de la Planta , Salinidad , Estaciones del Año , Suelo/química , Temperatura
12.
Pestic Biochem Physiol ; 105(1): 62-8, 2013 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-24238292

RESUMEN

The inhibitory effects of esterified lactoferrin (ELF) and lactoferrin (LF) against tobacco mosaic virus (TMV) in tobacco seedlings and the underlying mechanism were investigated. ELF and LF significantly inhibited viral infection and TMV multiplication in tobacco plants. ELF showed a higher inhibition effect against TMV than LF treatment in a dose and time-dependent way. Moreover, ELF induced a higher increase in the levels of transcription of pathogenesis-related (PR) protein genes [acidic PRs (PR-1a, PR-2, PR-3, PR-5) and basic PR-1] and defense-related enzymes [phenylalanine ammonia lyase (PAL, EC 4.3.1.5), and 5-epi-aristolochene synthase (EAS, EC 2.5.1.35)] both locally and systemically, in correlation with the induction of resistance against tobacco mosaic virus. Furthermore, ELF also induced accumulation of salicylic acid, SA 2-O-ß-D-glucoside and H2O2. These results suggested that ELF and LF could control TMV incidence and the mechanism might attribute to activate the expression of a number of defense genes.


Asunto(s)
Lactoferrina/farmacología , Nicotiana/virología , Enfermedades de las Plantas/virología , Virus del Mosaico del Tabaco/efectos de los fármacos , Esterificación , Lactoferrina/química , Enfermedades de las Plantas/prevención & control , Plantones/crecimiento & desarrollo , Plantones/virología , Nicotiana/crecimiento & desarrollo , Virus del Mosaico del Tabaco/fisiología
13.
PLoS One ; 8(7): e69027, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-23894401

RESUMEN

Evapotranspiration (E) and CO2 flux (Fc ) in the growing season of an unusual dry year were measured continuously over a Scots pine forest in eastern Finland, by eddy covariance techniques. The aims were to gain an understanding of their biological and environmental control processes. As a result, there were obvious diurnal and seasonal changes in E, Fc , surface conductance (gc ), and decoupling coefficient (Ω), showing similar trends to those in radiation (PAR) and vapour pressure deficit (δ). The maximum mean daily values (24-h average) for E, Fc , gc , and Ω were 1.78 mmol m(-2) s(-1), -11.18 µmol m(-2) s(-1), 6.27 mm s(-1), and 0.31, respectively, with seasonal averages of 0.71 mmol m(-2) s(-1), -4.61 µmol m(-2) s(-1), 3.3 mm s(-1), and 0.16. E and Fc were controlled by combined biological and environmental variables. There was curvilinear dependence of E on gc and Fc on gc . Among the environmental variables, PAR was the most important factor having a positive linear relationship to E and curvilinear relationship to Fc , while vapour pressure deficit was the most important environmental factor affecting gc . Water use efficiency was slightly higher in the dry season, with mean monthly values ranging from 6.67 to 7.48 µmol CO2 (mmol H2O)(-1) and a seasonal average of 7.06 µmol CO2 (µmol H2O)(-1). Low Ω and its close positive relationship with gc indicate that evapotranspiration was sensitive to surface conductance. Mid summer drought reduced surface conductance and decoupling coefficient, suggesting a more biotic control of evapotranspiration and a physiological acclimation to dry air. Surface conductance remained low and constant under dry condition, supporting that a constant value of surface constant can be used for modelling transpiration under drought condition.


Asunto(s)
Dióxido de Carbono/metabolismo , Pinus sylvestris/metabolismo , Pinus sylvestris/fisiología , Transpiración de Plantas/fisiología , Sequías
14.
Int J Biol Macromol ; 61: 264-9, 2013 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-23850557

RESUMEN

The antiviral activities of sulfated lentinan (sLNT) and lentinan (LNT) against tobacco mosaic virus (TMV) in tobacco seedlings and the underlying mechanism were investigated. Compared with LNT, sLNT showed significantly higher inhibitory effects on viral infection and TMV multiplication in a dose-dependent way, which might be due to its binding with TMV coat protein. In addition, both sLNT and LNT induced the transient production of H2O2 and expression of some defense-related genes (stilbene synthase, glucanase, acidic chitinase class IV, phenylalanine ammonia-lyase and 5-epi-aristolochene synthase) both locally and systemically. These results suggested that sLNT and LNT could control TMV incidence and the action mechanism might be associated with the affinity towards TMV coat protein and activation of some defense genes.


Asunto(s)
Antivirales/farmacología , Lentinano/análogos & derivados , Lentinano/farmacología , Nicotiana/efectos de los fármacos , Nicotiana/virología , Virus del Mosaico del Tabaco/efectos de los fármacos , Resistencia a la Enfermedad/genética , Polisacáridos Fúngicos/química , Regulación de la Expresión Génica de las Plantas , Peróxido de Hidrógeno/metabolismo , Enfermedades de las Plantas/virología , Hojas de la Planta/metabolismo , Hojas de la Planta/virología , Plantones/efectos de los fármacos , Plantones/virología , Hongos Shiitake/química , Nicotiana/genética , Nicotiana/metabolismo
15.
Int J Food Microbiol ; 161(3): 151-7, 2013 Feb 15.
Artículo en Inglés | MEDLINE | ID: mdl-23333340

RESUMEN

Lactoferrin (LF), an 80 kDa iron binding glycoprotein, was effective in the control of gray mould caused by Botrytis cinerea on tomato. LF strongly inhibited spore germination and germ tube elongation of B. cinerea in vitro, especially at 100 mg/L. When viewed by fluorescence microscopy following staining with propidium iodide, the membrane integrity of B. cinerea conidia treated with LF (50 mg/L) decreased to 68% at 2 h. The leakage of carbohydrate and protein from mycelia increased as the dose of LF increased compared with the untreated controls. Furthermore, methane dicarboxylic aldehyde (MDA) content in B. cinerea spores exposed to LF increased markedly. The activities of superoxide dismutase and catalase in spores treated with LF were also 1.3, twice as high as those in the control at 6 h, whereas ATP content was 1.5 times lower. In planta assays demonstrated that LF exhibited significant curative effect (76.3%, 100 mg/L) against gray mould, compared with the preventive effect (52.6%, 100 mg/L). The mechanisms by which LF decreased gray mould decay of tomato plant may be directly related to the severe damage to the conidia plasma membrane and loss of cytoplasmic materials from the hyphae. These findings suggest that LF has potential as an antifungal agent to reduce the severity of gray mould of tomato plants.


Asunto(s)
Botrytis/efectos de los fármacos , Fungicidas Industriales/farmacología , Lactoferrina/farmacología , Enfermedades de las Plantas/prevención & control , Solanum lycopersicum/microbiología , Adenosina Trifosfato/análisis , Botrytis/crecimiento & desarrollo , Catalasa/metabolismo , Membrana Celular/efectos de los fármacos , Hifa/efectos de los fármacos , Hifa/crecimiento & desarrollo , Malondialdehído/análisis , Enfermedades de las Plantas/microbiología , Esporas Fúngicas/efectos de los fármacos , Esporas Fúngicas/crecimiento & desarrollo , Superóxido Dismutasa/metabolismo
16.
Ying Yong Sheng Tai Xue Bao ; 24(8): 2141-50, 2013 Aug.
Artículo en Chino | MEDLINE | ID: mdl-24380331

RESUMEN

From January 2011 to January 2012, a monitoring was made on the soil respiration rate and its major affecting environmental factors along a gradient of water table (low, medium and high) in a reclaimed tidal wetland at the Dongtan of Chongming Island in the Yangtze Estuary of China. The annual soil respiration rate in the wetland with low, medium and high water table was 0.75-11.57, 0.70-12.61, and 0.83-6.67 micromol x m(-2) x s(-1), respectively. The soil respiration rate was the maximum in July and the minimum in January. The soil temperature in 0-5 cm layer was the key microclimate factor driving the soil respiration across the three gradients, which could explain more than 70% of the seasonal variation of soil respiration in the reclaimed tidal wetland by fitting an exponential model. No significant difference was observed in the temperature sensitivity of soil respiration (Q10 value) among the three gradients. The lowest soil respiration rate in the wetland with high water table was probably due to the lower soil temperature and the higher soil volumetric water content, whereas the higher soil respiration rate in the wetland with medium water table than with low water table could be caused by the lower soil electricity conductivity and bulk density and the higher aboveground biomass and live fine root density. To appropriately manipulate the water table in the reclaimed tidal wetland could decrease soil respiration rate and enhance the carbon sink function of this degraded wetland.


Asunto(s)
Dióxido de Carbono/análisis , Suelo/química , Humedales , China , Estuarios , Microclima , Ríos , Ciclo Hidrológico
17.
J Agric Food Chem ; 60(25): 6432-8, 2012 Jun 27.
Artículo en Inglés | MEDLINE | ID: mdl-22663181

RESUMEN

The effects of esterified lactoferrin (ELF) and lactoferrin (LF) on blue mold caused by Penicillium expansum in apple fruit stored at 25 °C were investigated. Both ELF and LF provided an effective control and strongly inhibited spore germination and germ tube elongation of P. expansum in vitro. Assessment by propidium iodide staining combined with fluorescent microscopy revealed that the plasma membrane of P. expansum spores was damaged more seriously by ELF than by LF treatment, and the leakage of protein and sugar was higher from ELF-treated mycelia. Interestingly, ELF treatment induced a significant increase in the activities of chitinase, ß-1,3-glucanase, and peroxidase in apple fruit, whereas both LF treatment and the control showed no obvious difference. These findings indicated that the effects of ELF on blue mold in apple fruit might be associated with the direct fungitoxic property against the pathogens and the elicitation of defense-related enzymes in fruit.


Asunto(s)
Fungicidas Industriales/farmacología , Lactoferrina/farmacología , Malus/microbiología , Enfermedades de las Plantas/microbiología , Quitinasas/metabolismo , Activación Enzimática/efectos de los fármacos , Esterificación , Frutas/microbiología , Lactoferrina/química , Malus/enzimología , Penicillium/efectos de los fármacos , Penicillium/crecimiento & desarrollo , Peroxidasa/metabolismo , Control Biológico de Vectores , Enfermedades de las Plantas/prevención & control , Proteínas de Plantas/metabolismo
18.
J Ocul Pharmacol Ther ; 27(5): 525-30, 2011 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-21951171

RESUMEN

PURPOSE: The purpose of this study was to investigate the effectiveness of intravitreal bevacizumab injections combined with tunable argon yellow laser photocoagulation as a treatment for adult-onset Coats' disease. METHODS: We consecutively treated 3 patients suffering from Coats' disease diagnosed in adulthood with a combination of intravitreal bevacizumab injection and tunable argon yellow laser photocoagulation. All patients received an intravitreal injection of 2.5 mg bevacizumab together with various sessions of laser photocoagulation targeting the area of telangiectasia. The patients' best-corrected visual acuities were recorded. Fundus photography, fluorescein angiography (FA), and optical coherence tomography were used to monitor vascular and retinal exudate changes. RESULTS: Fundus photography and FA of all 3 patients revealed significant regression of the vascular dilatation and the aneurysmal appearance of the telangiectasia areas. Optical coherence tomography also showed a significant subsidence of the macular edema and submacular fluid in all patients. A concomitant improvement in visual acuity was also noted. No treatment-related complications were identified. CONCLUSIONS: Combining intravitreal bevacizumab and tunable argon yellow laser photocoagulation is an efficient treatment of choice for Coats' disease that has been diagnosed in adulthood.


Asunto(s)
Inhibidores de la Angiogénesis/uso terapéutico , Anticuerpos Monoclonales Humanizados/uso terapéutico , Coagulación con Láser/métodos , Telangiectasia Retiniana/tratamiento farmacológico , Anciano , Inhibidores de la Angiogénesis/administración & dosificación , Anticuerpos Monoclonales Humanizados/administración & dosificación , Bevacizumab , Terapia Combinada , Angiografía con Fluoresceína , Humanos , Inyecciones Intravítreas , Láseres de Colorantes/uso terapéutico , Masculino , Persona de Mediana Edad , Fotograbar , Telangiectasia Retiniana/patología , Telangiectasia Retiniana/cirugía , Tomografía de Coherencia Óptica , Resultado del Tratamiento , Agudeza Visual , Adulto Joven
19.
Tree Physiol ; 31(3): 323-38, 2011 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-21436231

RESUMEN

A process-based ecosystem model was used to assess the impacts of changing climate on net photosynthesis and total stem wood growth in relation to water availability in two unmanaged Norway spruce (Picea abies) dominant stands with a mixture of Scots pine (Pinus sylvestris) and birch (Betula sp.). The mixed stands were grown over a 100-year rotation (2000-99) in southern and northern Finland with initial species shares of 50, 25 and 25% for Norway spruce, Scots pine and birch, respectively. In addition, pure Norway spruce, Scots pine and birch stands were used as a comparison to identify whether species' response is different in mixed and pure stands. Soil type and moisture conditions (moderate drought) were expected to be the same at the beginning of the simulations irrespective of site location. Regardless of tree species, both annual net canopy photosynthesis (P(nc)) and total stem wood growth (V(s)) were, on average, lower on the southern site under the changing climate compared with the current climate (difference increasing toward the end of the rotation); the opposite was the case for the northern site. Regarding the stand water budget, evapotranspiration (E(T)) was higher under the changing climate regardless of site location. Transpiration and evaporation from the canopy affected water depletion the most. Norway spruce and birch accounted for most of the water depletion in mixed stands on both sites regardless of climatic condition. The annual soil water deficit (W(d)) was higher on the southern site under the changing climate. On the northern site, the situation was the opposite. According to our results, the growth of pure Norway spruce stands in southern Finland could be even lower than the growth of Norway spruce in mixed stands under the changing climate. The opposite was found for pure Scots pine and birch stands due to lower water depletion. This indicates that in the future the management should be properly adapted to climate change in order to sustain the productivity of mixed stands dominated by Norway spruce.


Asunto(s)
Betula/crecimiento & desarrollo , Cambio Climático , Picea/crecimiento & desarrollo , Pinus sylvestris/crecimiento & desarrollo , Madera/crecimiento & desarrollo , Carbono/metabolismo , Sequías , Ecosistema , Finlandia , Modelos Biológicos , Fotosíntesis , Transpiración de Plantas , Suelo , Agua
20.
Ying Yong Sheng Tai Xue Bao ; 20(5): 1132-9, 2009 May.
Artículo en Chino | MEDLINE | ID: mdl-19803171

RESUMEN

An ecological planning approach for Shanghai Expo 2010 was constructed based on "overlay-maps" model, and the ecological elements and GIS visualization in Shanghai Expo 2010 area were investigated and analyzed from the aspects of human comfort degree, life health, and sustainable utilization of resources. This approach included the determination of objectives for ecological planning, the selection and in situ investigation of ecological elements, the construction of eco-database, and the integrative analysis of GIS visualization, being indispensable for the prior period research of ecological planning of Expo area. Based on the present situation of soil pollution in the Expo area, a tentative scheme of soil restoration and utilization was brought forward, with the concerns of green space demand and soil secondary pollution avoidance. To protect the wild life habitats in Expo area, a demarcation of conservation areas for plants and original landscape was made. A conception of using landscape elements to optimize air temperature, humidity, and ventilation in the process of urban design was proposed, aimed to promote the human comfort degree under tropical monsoon conditions.


Asunto(s)
Planificación de Ciudades , Ecosistema , Planificación Ambiental , China , Sistemas de Información Geográfica , Modelos Teóricos , Poaceae/crecimiento & desarrollo , Árboles/crecimiento & desarrollo
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