RESUMEN
OBJECTIVES: This study aimed to evaluate the clinical effects of ethmoidal and maxillary nerve blocks during rhinoscopy in dogs. MATERIALS AND METHODS: Fourteen dogs underwent rhinoscopy. Under general anaesthesia with isoflurane, ethmoidal and maxillary nerve blocks were applied bilaterally using 2% lidocaine before rhinoscopy in eight dogs (EM group). Six dogs were premedicated with hydromorphone (0.05 mg/kg) as a substitute for local nerve block (H group). During rhinoscopy, the heart rate, arterial blood pressure and end-tidal isoflurane concentration were recorded. The vaporizer setting was adjusted to increase the end-tidal isoflurane concentration when reflex movement was caused by nasal stimulation. RESULTS: The H group, compared to the EM group, had an increase in HR that was 18 beats/minute (95% CI: 11 to 26) higher, an increase in SAP that was 22 mmHg (12 to 31) higher, an increase in MAP that was 15 mmHg (7 to 23) higher, an increase in DAP that was 12 mmHg (5 to 19) higher, and an increase in end-tidal isoflurane concentration that was 0.4% (0.3 to 0.5) higher. Head movement due to endoscope insertion was observed in 5/6 dogs (83.3%) in the H group and 1/8 dogs (12.5%) in the EM group (odds ratio, 0.029; ra95% CI, 0.001-0.574). CLINICAL SIGNIFICANCE: Compared with administration of 0.05 mg/kg hydromorphone, concurrent block of the ethmoidal and maxillary nerves can reduce the cardiovascular response, reflex movement and anaesthetic requirement during rhinoscopy in dogs.
Asunto(s)
Anestésicos por Inhalación , Isoflurano , Bloqueo Nervioso , Animales , Perros , Analgésicos Opioides , Hidromorfona , Nervio Maxilar , Bloqueo Nervioso/veterinariaRESUMEN
AIM: To evaluate the role of histogram analysis of apparent diffusion coefficient (ADC) maps from diffusion-weighted imaging (DWI) in the differentiation of follicular thyroid carcinoma (FTC) from follicular adenoma (FA) in nodules indeterminate on ultrasound-guided core needle biopsy (USCNB). MATERIALS AND METHODS: This study was performed with institutional review board approval. Seventeen patients who were planned to undergo diagnostic lobectomy for an indeterminate thyroid nodule (atypical of unknown significance/follicular lesion of undetermined significance [AUS/FLUS] or suspicious for follicular neoplasm/follicular neoplasm [SFN]) on USCNB were enrolled prospectively. All patients underwent DWI on the day before surgery. Histogram parameters were derived from ADC values obtained from the whole extent of the tumours. The parameters were compared with the final diagnosis based on histopathological examination after surgery. The accuracy of the parameters in differentiating FTC from FA was evaluated using receiver operating characteristic (ROC) curve analysis. RESULTS: Twelve patients were confirmed as having FA and five patients as having FTC. Histogram parameters including the 10th (ADC10), 25th (ADC25), and 50th (ADC50) percentiles of the ADC values were significantly lower in FA than in FTC (p < 0.05, all). ROC curve analysis revealed that ADC25 resulted in the highest AUC (0.867; confidence interval, 0.616-0.980), with a cut-off value of 0.352×10-3 mm2/s. CONCLUSION: Histogram parameters from ADC maps could differentiate FTC from FA effectively in indeterminate nodules on USCNB, with ADC25 being the most promising parameter.
Asunto(s)
Adenocarcinoma Folicular/diagnóstico por imagen , Adenoma/diagnóstico por imagen , Imagen de Difusión por Resonancia Magnética , Neoplasias de la Tiroides/diagnóstico por imagen , Adenocarcinoma Folicular/diagnóstico , Adenocarcinoma Folicular/patología , Adenoma/diagnóstico , Adenoma/patología , Adulto , Anciano , Diagnóstico Diferencial , Imagen de Difusión por Resonancia Magnética/métodos , Femenino , Humanos , Masculino , Persona de Mediana Edad , Glándula Tiroides/diagnóstico por imagen , Glándula Tiroides/patología , Neoplasias de la Tiroides/diagnóstico , Neoplasias de la Tiroides/patologíaRESUMEN
BACKGROUND: This study evaluated the impact of lymph node-related factors on the risk of and site of recurrence in patients who had papillary thyroid carcinoma with lymph node metastasis in the lateral compartment (classified as pN1b). METHODS: Patients underwent total thyroidectomy with unilateral modified radical neck dissection for classical papillary thyroid carcinoma. Risk factors for recurrence were evaluated according to the pattern of recurrence. RESULTS: A total of 324 patients were included in the study. The median follow-up was 63 (range 14-181) months. Recurrence was detected in 47 patients (14·5 per cent). In the multivariable analysis, a maximum diameter of metastatic lymph nodes larger than 2·0 cm (hazard ratio (HR) 1·15, 95 per cent c.i. 1·06 to 1·25; P = 0·033) and a central compartment metastatic lymph node ratio of more than 0·42 (HR 3·35, 1·65 to 6·79; P < 0·001) were identified as independent risk factors for locoregional recurrence. Age 45 years or older (HR 5·69, 1·24 to 26·12; P = 0·025) and extranodal extension of metastasis (HR 12·71, 1·64 to 98·25; P = 0·015) were risk factors for distant metastasis. In subgroup analysis of locoregional recurrence, several lymph node-related factors affected the risk of recurrence according to the specific site of metastasis. CONCLUSION: Lymph node-related factors are of importance for the risk of recurrence in patients with classical papillary thyroid carcinoma classified as pN1b.
Asunto(s)
Carcinoma Papilar/patología , Disección del Cuello , Recurrencia Local de Neoplasia/patología , Neoplasias de la Tiroides/patología , Factores de Edad , Carcinoma Papilar/cirugía , Femenino , Estudios de Seguimiento , Humanos , Metástasis Linfática , Masculino , Persona de Mediana Edad , Análisis Multivariante , Metástasis de la Neoplasia , Estudios Retrospectivos , Factores de Riesgo , Neoplasias de la Tiroides/cirugía , TiroidectomíaRESUMEN
In renal cell carcinoma, transglutaminase 2 (TGase 2) crosslinks p53 in autophagosomes, resulting in p53 depletion and the tumor's evasion of apoptosis. Inhibition of TGase 2 stabilizes p53 and induces tumor cells to enter apoptosis. This study explored the mechanism of TGase 2-dependent p53 degradation. We found that TGase 2 competes with human double minute 2 homolog (HDM2) for binding to p53; promotes autophagy-dependent p53 degradation in renal cell carcinoma (RCC) cell lines under starvation; and binds to p53 and p62 simultaneously without ubiquitin-dependent recognition of p62. The bound complex does not have crosslinking activity. A binding assay using a series of deletion mutants of p62, p53 and TGase 2 revealed that the PB1 (Phox and Bem1p-1) domain of p62 (residues 85-110) directly interacts with the ß-barrel domains of TGase 2 (residues 592-687), whereas the HDM2-binding domain (transactivation domain, residues 15-26) of p53 interacts with the N terminus of TGase 2 (residues 1-139). In addition to the increase in p53 stability due to TGase 2 inhibition, the administration of a DNA-damaging anti-cancer drug such as doxorubicin-induced apoptosis in RCC cell lines and synergistically reduced tumor volume in a xenograft model. Combination therapy with a TGase 2 inhibitor and a DNA-damaging agent may represent an effective therapeutic approach for treating RCC.
Asunto(s)
Apoptosis , Proteínas de Unión al GTP/metabolismo , Transglutaminasas/metabolismo , Proteína p53 Supresora de Tumor/genética , Animales , Antibióticos Antineoplásicos/farmacología , Antibióticos Antineoplásicos/uso terapéutico , Apoptosis/efectos de los fármacos , Autofagia/efectos de los fármacos , Carcinoma de Células Renales/tratamiento farmacológico , Carcinoma de Células Renales/metabolismo , Carcinoma de Células Renales/patología , Línea Celular Tumoral , Cloroquina/farmacología , Daño del ADN/efectos de los fármacos , Doxorrubicina/farmacología , Doxorrubicina/uso terapéutico , Femenino , Proteínas de Unión al GTP/antagonistas & inhibidores , Proteínas de Unión al GTP/genética , Humanos , Neoplasias Renales/tratamiento farmacológico , Neoplasias Renales/metabolismo , Neoplasias Renales/patología , Ratones , Ratones Endogámicos BALB C , Ratones Desnudos , Fosforilación/efectos de los fármacos , Unión Proteica , Proteína Glutamina Gamma Glutamiltransferasa 2 , Proteínas Proto-Oncogénicas c-mdm2/antagonistas & inhibidores , Proteínas Proto-Oncogénicas c-mdm2/genética , Proteínas Proto-Oncogénicas c-mdm2/metabolismo , Pirazinas/farmacología , Pirazinas/uso terapéutico , Proteínas de Unión al ARN/química , Proteínas de Unión al ARN/metabolismo , Transglutaminasas/antagonistas & inhibidores , Transglutaminasas/genética , Proteína p53 Supresora de Tumor/química , Proteína p53 Supresora de Tumor/metabolismoRESUMEN
The increasing number of legislative restrictions and the voluntary withdrawal of antibiotic growth promoters worldwide will continue to impact poultry health and production. The rising incidence of Clostridium infections and development of necrotic enteritis (NE) in commercial chickens has been associated with the withdrawal of antibiotics. High-throughput genomic analysis of intestinal tissues from NE-afflicted chickens showed alterations in the local immunity and gut microbiota. Therefore, a better understanding of host- and environmentally related factors on Clostridium perfringens infections will be necessary for the development of effective sustainable strategies aimed to reduce the negative consequences of NE. In this short review, we summarize the current knowledge on the role of host genomics and immunity in NE. The limited progress in understanding the complexity of host-pathogen interactions in NE underscores the urgent need for more fundamental research in host immunity against Clostridium pathogens in order to develop effective control strategies against NE.
Asunto(s)
Pollos/inmunología , Infecciones por Clostridium/veterinaria , Clostridium perfringens/inmunología , Enteritis/veterinaria , Interacciones Huésped-Patógeno , Enfermedades de las Aves de Corral/inmunología , Animales , Pollos/genética , Infecciones por Clostridium/inmunología , Clostridium perfringens/fisiología , Enteritis/inmunología , Necrosis/veterinariaRESUMEN
Functional imaging studies and voxel-based morphometry analysis of brain magnetic resonance imaging showed abnormalities in the hypothalamus-thalamus-orbitofrontal pathway, demonstrating altered hypocretin pathway in narcolepsy. Those distinct morphometric changes account for problems in wake-sleep control, attention and memory. It also raised the necessity to evaluate white matter changes. To investigate brain white matter alterations in drug-naïve narcolepsy patients with cataplexy and to explore relationships between white matter changes and patient clinical characteristics, drug-naïve narcolepsy patients with cataplexy (n = 22) and healthy age- and gender-matched controls (n = 26) were studied. Fractional anisotropy and mean diffusivity images were obtained from whole-brain diffusion tensor imaging, and tract-based spatial statistics were used to localize white matter abnormalities. Compared with controls, patients showed significant decreases in fractional anisotropy of white matter of the bilateral anterior cingulate, fronto-orbital area, frontal lobe, anterior limb of the internal capsule and corpus callosum, as well as the left anterior and medial thalamus. Patients and controls showed no differences in mean diffusivity. Among patients, mean diffusivity values of white matter in the bilateral superior frontal gyri, bilateral fronto-orbital gyri and right superior parietal gyrus were positively correlated with depressive mood. This tract-based spatial statistics study demonstrated that drug-naïve patients with narcolepsy had reduced fractional anisotropy of white matter in multiple brain areas and significant relationship between increased mean diffusivity of white matter in frontal/cingulate and depression. It suggests the widespread disruption of white matter integrity and prevalent brain degeneration of frontal lobes according to a depressive symptom in narcolepsy.
Asunto(s)
Cataplejía/patología , Sustancia Blanca/patología , Adolescente , Adulto , Anisotropía , Cataplejía/complicaciones , Cataplejía/diagnóstico por imagen , Corteza Cerebral/diagnóstico por imagen , Corteza Cerebral/patología , Niño , Cuerpo Calloso/diagnóstico por imagen , Cuerpo Calloso/patología , Depresión/complicaciones , Depresión/patología , Imagen de Difusión Tensora , Femenino , Humanos , Hipotálamo/diagnóstico por imagen , Hipotálamo/patología , Imagen por Resonancia Magnética , Masculino , Sustancia Blanca/diagnóstico por imagen , Adulto JovenRESUMEN
This study investigated 151 patients undergoing cardiac surgery to determine whether measurement of regional cerebral oxygen saturation (rS(c)O(2)) using near-infrared spectroscopy (NIRS) can indicate a low haematocrit after initiation of hypothermic cardiopulmonary bypass (CPB). Haematocrit, rS(c)O(2), haemoglobin level, arterial partial pressures of carbon dioxide and oxygen, systemic blood pressure, and nasopharyngeal and rectal temperatures were determined 5 min after the initial administration of heparin for CPB and 90 s after completion of the first cardioplegic solution injection. Immediately after initiation of hypothermic CPB, rS(c)O(2), haemoglobin and haematocrit values were significantly lower than those before CPB. No significant correlations were found between the change in haematocrit and changes in left, right and mean rS(c)O(2); thus, changes in rS(c)O(2) before and after initiation of hypothermic CPB did not reflect changes in haematocrit values. This indicates that NIRS cannot provide early warning of a low haematocrit immediately after initiation of hypothermic CPB in cardiac surgery.
Asunto(s)
Procedimientos Quirúrgicos Cardíacos , Puente Cardiopulmonar , Hipotermia , Monitoreo Intraoperatorio , Espectroscopía Infrarroja Corta , Presión Sanguínea , Temperatura Corporal , Femenino , Estudios de Seguimiento , Hematócrito , Hemoglobinas/metabolismo , Humanos , Masculino , Persona de Mediana Edad , Oximetría , Oxígeno/sangre , Pronóstico , Factores de RiesgoRESUMEN
The leaves of Artocarpus tonkinensis are used in Vietnamese traditional medicine for treatment of arthritis, and the compound maesopsin 4-O-ß-D-glucoside (TAT-2), isolated from them, inhibits the proliferation of activated T cells. Our goal was to test the anti-proliferative activity of TAT-2 on the T-cell leukemia, Jurkat, and on the acute myeloid leukemia, OCI-AML. TAT-2 inhibited the growth of OCI-AML (and additional acute myeloid leukemia cells) but not Jurkat cells. Growth inhibition was shown to be due to inhibition of proliferation rather than increase in cell death. Analysis of cytokine release showed that TAT-2 stimulated the release of TGF-ß, yet TGF-ß neutralization did not reverse the maesopsin-dependent effect. Gene expression profiling determined that maesopsin modulated 19 identifiable genes. Transcription factor CP2 was the gene most significantly modulated. Real-time PCR validated that up-regulation of sulphiredoxin 1 homolog (SRXN1), hemeoxygenase 1 (HMOX1), and breast carcinoma amplified sequence 3 (BCAS3) were consistently modulated.
Asunto(s)
Benzofuranos/farmacología , Glucósidos/farmacología , Hemo-Oxigenasa 1/genética , Leucemia Mieloide Aguda/tratamiento farmacológico , Leucemia Mieloide Aguda/genética , Proteínas de Neoplasias/genética , Oxidorreductasas actuantes sobre Donantes de Grupos Sulfuro/genética , Artocarpus/química , Muerte Celular/efectos de los fármacos , Procesos de Crecimiento Celular/efectos de los fármacos , Línea Celular Tumoral , Proteínas de Unión al ADN/genética , Relación Dosis-Respuesta a Droga , Expresión Génica/efectos de los fármacos , Perfilación de la Expresión Génica/métodos , Células HL-60 , Hemo-Oxigenasa 1/biosíntesis , Humanos , Células Jurkat , Leucemia Mieloide Aguda/metabolismo , Leucemia Mieloide Aguda/patología , Leucemia de Células T/tratamiento farmacológico , Leucemia de Células T/genética , Leucemia de Células T/metabolismo , Leucemia de Células T/patología , Masculino , Persona de Mediana Edad , Proteínas de Neoplasias/biosíntesis , Análisis de Secuencia por Matrices de Oligonucleótidos/métodos , Oxidorreductasas actuantes sobre Donantes de Grupos Sulfuro/biosíntesis , Linfocitos T/efectos de los fármacos , Factores de Transcripción/genética , Factor de Crecimiento Transformador beta/metabolismo , Células U937 , Regulación hacia Arriba/efectos de los fármacosRESUMEN
Renal transplant is the only curative treatment for end-stage renal disease. As diabetes and obesity are the major causes of graft failure and post-transplant complication, it is important to manage obesity in patients with renal transplant. Herein, we report a case of a morbidly obese renal-transplant patient with poorly controlled diabetes who received bariatric surgery. A 34-year-old obese Taiwanese man with type 2 diabetes had end-stage renal disease that had progressed since 2008, when he had commenced hemodialysis (January 2008) and had a renal transplant (July 2008). Because of persistent obesity and poorly controlled diabetes, he received LRYGB at Chiayi Christian hospital on 18 August 2010. In the month that followed, he lost 10 kg. His serum creatinine decreased to 1.11 mg/dL (1.4 mg/dL, preoperative) and his hemoglobin A1c decreased to 8.5% (10.4%, preoperative). These results indicate that, in obese renal transplant patients, LRYGB may be employed to treat obesity, control diabetes and stabilize or improve the renal function.
Asunto(s)
Derivación Gástrica/métodos , Fallo Renal Crónico/cirugía , Trasplante de Riñón , Laparoscopía , Obesidad Mórbida/cirugía , Adulto , Diabetes Mellitus Tipo 2/complicaciones , Humanos , Fallo Renal Crónico/complicaciones , Masculino , Obesidad Mórbida/complicacionesRESUMEN
The need for cost-effective low-energy wastewater treatment has never been greater. Clean water for our expanding and predominantly urban global population will be expensive to deliver, eats into our diminishing carbon-based energy reserves and consequently contributes to green house gases in the atmosphere and climate change. Thus every potential cost and energy cutting measure for wastewater treatment should be explored. Microbial fuel cells (MFCs) could potentially yield such savings but, to achieve this, requires significant advances in our understanding in a few critical areas and in our designs of the overall systems. Here we review the research which might accelerate our progress towards sustainable wastewater treatment using MFCs: system control and modelling and the understanding of the ecology of the microbial communities that catalyse the generation of electricity.
Asunto(s)
Fuentes de Energía Bioeléctrica , Conservación de los Recursos Naturales/métodos , Eliminación de Residuos Líquidos/métodos , Purificación del Agua/métodos , Reactores Biológicos/microbiología , Modelos BiológicosRESUMEN
OBJECTIVES: To compare the effects of living alone versus living in a group setting on the health, nutrition, personal cognition and general living function of a group of elderly Taiwanese. We also hypothesized that older adults living alone would have poorer indices of function and health than would elderly persons living in a group setting. DESIGN AND PARTICIPANTS: We conducted a cross-sectional validation study of 360 men and women older than 65 y. The subjects were 120 solitary (living alone) elders and 240 were non-solitary elders. MEASUREMENTS: Both groups completed a series of questionnaires, including the Nutrition Screening Initiative (NSI), Mini Nutritional Assessment (MNA), Activities of Daily Living (ADLs/Barthel scales), Instrumental Activities of Daily Living (IADLs/Lawton scales), Short Portable Mental State Questionnaire (SPMSQ), and Geriatric Depression Scale (GDS). The participants were then administered by specially trained field workers. Blood samples were taken and body mass index, and mid-arm and calf circumferences were measured. The results for each group were statistically analyzed. A p-value < 0.05 was considered significant. RESULTS: The nutritional and health status of the solitary elders, especially males, was poor compared to that of the non-solitary elders. In the solitary elders group, the average scores on the NSI, MNA, ADL, IADL, SPMSQ, and GDS were: 4.6, 23.7, 95.6, 7.6, 0.5, and 13%, respectively. CONCLUSION: Solitary elders, especially males, have a significantly increased risk of poor nutrition (MNA < 24), poor health status, impaired cognition, and impaired activities of daily living.
Asunto(s)
Envejecimiento/fisiología , Envejecimiento/psicología , Estado de Salud , Soledad , Estado Nutricional , Actividades Cotidianas , Anciano , Estudios Transversales , Femenino , Evaluación Geriátrica , Humanos , Soledad/psicología , Masculino , Evaluación Nutricional , Factores Sexuales , Encuestas y Cuestionarios , TaiwánRESUMEN
BACKGROUND: The negative prognostic role of pathologic fracture in osteosarcoma is not determined, as previous case-control and retrospective cohort studies have produced contradictory results. METHODS: We conducted both cohort (n = 384) and case-control (n = 111) studies on 37 pathologically fractured localized osteosarcoma of extremity. RESULTS: In cohort study, patients with a fracture showed a tendency of poorer survival, but the difference did not reach the level of significance (5-year metastasis-free survival rates; 48% for cases vs. 61% for controls; P = 0.06). A case-control study on 37 fractured and 74 control recruited from 347 patients matched for tumor size and location showed no survival difference between the cases and controls (P = 0.12). CONCLUSIONS: Reported negative prognostic effect of a pathologic fracture is likely to be due to confounding by tumor size and location. The present study suggests that the presence of a pathologic fracture has no prognostic relevance.
Asunto(s)
Neoplasias Óseas/mortalidad , Fracturas Óseas/patología , Osteosarcoma/mortalidad , Adolescente , Neoplasias Óseas/patología , Neoplasias Óseas/terapia , Estudios de Casos y Controles , Estudios de Cohortes , Femenino , Fracturas Óseas/terapia , Humanos , Masculino , Análisis Multivariante , Osteosarcoma/patología , Osteosarcoma/terapia , Pronóstico , Análisis de SupervivenciaRESUMEN
BACKGROUND: An end-tidal concentration of 1% sevoflurane (1% ET(SEVO)) in 50% nitrous oxide (N(2)O) during elective cesarean delivery has been associated with bispectral index (BIS) values >60, which are associated with an increased risk of awareness. We hypothesized that BIS values during sevoflurane-N(2)O general anesthesia for cesarean delivery would be lower in women with prior labor compared with women without prior labor. METHODS: Forty patients undergoing cesarean delivery were enrolled in this observational study. One group had urgent surgery after labor (labor group, n = 20) and the other had elective surgery without labor (control group, n = 20). General anesthesia was induced with thiopental 4 mg/kg, followed by succinylcholine 1.5 mg/kg, and maintained with 1% ET(SEVO) and 50% N(2)O in oxygen. BIS values, systolic arterial blood pressure, heart rate, plasma stress hormone concentrations, Apgar scores, and postoperative analgesia variables were assessed and compared between groups. RESULTS: BIS values during the period between intubation and delivery were lower in the labor group than in the control group (P < 0.001). Plasma norepinephrine concentrations increased at delivery compared with baseline in both groups. They were higher in the labor group than in the control group both at baseline and at delivery. Systolic arterial blood pressure, heart rate, Apgar scores, surgical characteristics, and plasma concentrations of vasopressin and cortisol were not different between groups. Postoperative visual analog scale pain scores were similar between groups, while the labor group consumed less analgesics (P < 0.01) during the first 24 h after the operation. CONCLUSIONS: Prior labor was associated with lower intraoperative BIS values during sevoflurane/N(2)O general anesthesia and reduced postoperative analgesic consumption in women undergoing cesarean delivery compared with women without prior labor.
Asunto(s)
Anestesia General , Anestésicos por Inhalación/administración & dosificación , Encéfalo/efectos de los fármacos , Cesárea , Electroencefalografía , Trabajo de Parto , Éteres Metílicos/administración & dosificación , Monitoreo Intraoperatorio/métodos , Óxido Nitroso/administración & dosificación , Adulto , Analgésicos/uso terapéutico , Puntaje de Apgar , Presión Sanguínea/efectos de los fármacos , Encéfalo/fisiología , Procedimientos Quirúrgicos Electivos , Tratamiento de Urgencia , Epinefrina/sangre , Femenino , Frecuencia Cardíaca/efectos de los fármacos , Humanos , Hidrocortisona/sangre , Trabajo de Parto/sangre , Trabajo de Parto/fisiología , Neurofisinas/sangre , Norepinefrina/sangre , Dimensión del Dolor , Dolor Postoperatorio/prevención & control , Embarazo , Precursores de Proteínas/sangre , Sevoflurano , Factores de Tiempo , Vasopresinas/sangreRESUMEN
BACKGROUND: Autonomic hyperreflexia (AHR) is a potentially life-threatening hypertensive condition that occurs in patients with high spinal cord injury (SCI). The current study was aimed to determine sevoflurane concentrations that block AHR in SCI patients. METHODS: The study involved 28 patients with chronic, complete SCI scheduled to undergo transurethral litholapaxy during general anesthesia. Nine patients without SCI served as controls post hoc. Anesthesia was induced with thiopental, and sevoflurane concentrations in 50% nitrous oxide were adjusted to maintain a Bispectral Index of 40-50. When a patient developed AHR during bladder distension, the target sevoflurane concentration was maintained for at least 10 min, and then the procedure was resumed. Systolic blood pressure, heart rate, and Bispectral Index as well as plasma concentrations of catecholamines and arginine vasopressin were measured before and during the bladder distension. Each target concentration was determined by the up-and-down method based on changes (15% increase or more) of systolic blood pressure in response to bladder distension. RESULTS: In SCI, systolic pressure increased by 67 +/- 33 mmHg, whereas heart rate decreased by 13 +/- 8 beats/min during the first trial (P < 0.01). The hypertensive event was associated with increases of norepinephrine concentrations, but not of epinephrine or vasopressin concentrations. Systolic pressure, heart rate, and norepinephrine concentrations did not change significantly in the control patients. The end-tidal concentrations of sevoflurane to prevent AHR were EC50 of 3.12% and EC95 of 3.83%. CONCLUSION: The EC95 for sevoflurane in 50% nitrous oxide to block AHR during transurethral litholapaxy in patients with SCI was 3.83%.
Asunto(s)
Anestésicos por Inhalación/uso terapéutico , Disreflexia Autónoma/prevención & control , Sistema Nervioso Autónomo/fisiopatología , Litotricia/métodos , Éteres Metílicos/uso terapéutico , Traumatismos de la Médula Espinal/terapia , Adulto , Sistema Nervioso Autónomo/efectos de los fármacos , Presión Sanguínea/efectos de los fármacos , Femenino , Frecuencia Cardíaca/efectos de los fármacos , Humanos , Masculino , Persona de Mediana Edad , Norepinefrina/sangre , Valores de Referencia , Sevoflurano , Sístole/efectos de los fármacos , Vejiga UrinariaRESUMEN
As part of our effort to identify enzymes that are critical for producing large amounts of ricinoleate in castor oil, we have isolated three cDNAs encoding acyl-CoA synthetase (ACS) in the castor plant. Analysis of the cDNA sequences reveals that two of them, designated RcACS 2 and RcACS 4, contain complete coding regions corresponding to 694 and 690 amino acids, respectively. The third cDNA, RcACS 1, encodes a truncated gene sequence. The RcACS 2 and RcACS 4 share 77% identity at the amino acid sequence level. Complementation tests showed that both RcACS 2 and RcACS 4 successfully restored growth of a yeast mutant strain (YB525) deficient in ACS. Lysates from yeast cells expressing RcACS 2 and 4 were enzymatically active when using 14C-labeled oleic acid as a substrate. A cell fractionation study indicates that RcACS 2 and 4 are mainly associated with membranes. Substrate specificity assays indicate that the RcACS 2 preferentially activates ricinoleate, while the RcACS 4 has a preference for nonhydroxy fatty acids.
Asunto(s)
Coenzima A Ligasas/metabolismo , Proteínas de Plantas/metabolismo , Ácidos Ricinoleicos/metabolismo , Ricinus communis/enzimología , Secuencia de Aminoácidos , Clonación Molecular , Coenzima A Ligasas/genética , ADN Complementario/metabolismo , Prueba de Complementación Genética , Datos de Secuencia Molecular , Proteínas de Plantas/genética , Saccharomyces cerevisiae/genética , Saccharomyces cerevisiae/metabolismo , Alineación de Secuencia , Especificidad por SustratoRESUMEN
BACKGROUND/AIMS: Krukenberg's tumor is considered to be a metastatic carcinoma to the ovary derived from a primary malignancy, usually from the gastrointestinal tract. This retrospective study tries to evaluate the clinicopathologic characteristics of ovarian metastasis in female gastric cancer and to define the prognostic factors. METHODOLOGY: Of 1,890 female patients with gastric cancers, 37 patients with metastatic ovarian carcinomas were analyzed. RESULTS: Patients with ovarian metastasis were younger in age, higher in primary tumor location, and far advanced in depth of invasion and lymph node metastases. Ovarian metastasis was largely related to the peritoneal seeding, which was statistically significant on survival time. A multivariate analysis of prognostic factors indicated that the presence of peritoneal seeding was the only significant independent factor. The young female patients with far advanced gastric cancer were vulnerable to recurrence of ovarian metastasis and were considered to undergo prophylactic oophorectomy with gastrectomy. The prognosis of ovarian metastasis is dismal, because this is frequently associated with the peritoneal disseminations. CONCLUSIONS: It is essential to treat the peritoneal disseminations in order to improve the survival rate of female gastric cancer patients with ovarian metastasis.
Asunto(s)
Tumor de Krukenberg/diagnóstico , Tumor de Krukenberg/secundario , Neoplasias Ováricas/diagnóstico , Neoplasias Ováricas/secundario , Neoplasias Gástricas/patología , Adulto , Femenino , Humanos , Tumor de Krukenberg/patología , Persona de Mediana Edad , Neoplasias Ováricas/patología , Pronóstico , Estudios Retrospectivos , RiesgoRESUMEN
From Fissistigma pallens (Fin. & Gagn.) Merr. (Annonaceae), a Vietnamese folk medicinal plant, a novel eudesmane glycoside named fissispallin (1) has been isolated, besides afzelin. Their structures were elucidated by spectroscopic methods (1H, 13C and 2D NMR).
Asunto(s)
Annonaceae/química , Sesquiterpenos de Eudesmano/química , Espectroscopía de Resonancia Magnética , Espectrometría de Masas , Hojas de la Planta/química , Sesquiterpenos de Eudesmano/aislamiento & purificación , VietnamRESUMEN
Chemical investigation of Stephania rotunda Lour. growing in Viet Nam led to the isolation and structural elucidation of three new alkaloids, 5-hydroxy-6,7-dimethoxy-3,4-dihydroisoquinolin-1(2H)-one (1), thaicanine 4-O-beta-D-glucoside (6), as well as (-)-thaicanine N-oxide (4-hydroxycorynoxidine) (8), along with 23 known alkaloids. These structures were determined on the basis of MS and NMR spectroscopic data.
Asunto(s)
Alcaloides/química , Alcaloides de Berberina/química , Compuestos Heterocíclicos de 4 o más Anillos/química , Isoquinolinas/química , Monosacáridos/química , Stephania/química , Alcaloides/aislamiento & purificación , Alcaloides de Berberina/aislamiento & purificación , Compuestos Heterocíclicos de 4 o más Anillos/aislamiento & purificación , Isoquinolinas/aislamiento & purificación , Espectroscopía de Resonancia Magnética , Espectrometría de Masas , Monosacáridos/aislamiento & purificación , Espectrometría de Masa por Ionización de Electrospray , VietnamRESUMEN
A new flavone named miliufavol [8-(2-hydroxybenzyl)-5-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-3,7-dimethoxy-4H-chromen-4-one or 8-C-(o)-hydroxybenzylpachypodol] from Miliusa balansae (Annonaceae) was isolated and structurally elucidated by spectroscopic means besides four known flavones: ombuine, chrysosplenol B, pachypodol and chrysosplenol C. These flavonoids exhibited interesting cytotoxic activity against three human cell lines (KB, Hep-G2, RD) with IC50 values < 5 microg/ml.
Asunto(s)
Annonaceae/química , Antineoplásicos Fitogénicos/farmacología , Flavonas/farmacología , Antineoplásicos Fitogénicos/biosíntesis , Antineoplásicos Fitogénicos/aislamiento & purificación , Línea Celular Tumoral , Ensayos de Selección de Medicamentos Antitumorales , Ensayo de Inmunoadsorción Enzimática , Flavonas/biosíntesis , Flavonas/aislamiento & purificación , Humanos , Espectroscopía de Resonancia Magnética , Hojas de la Planta/química , Espectrometría de Masa por Ionización de Electrospray , Espectroscopía Infrarroja por Transformada de FourierRESUMEN
Activity-guided fractionation of the n-butanol extract from the leaves of Artocarpus tonkinensis led to the isolation of the auronol glycosides maesopsin 4-O-glucoside (1), as well as the new alphitonin-4-O-glucoside (2). These structures were identified on the basis of MS and NMR spectroscopic data. The lymphocyte stimulation test showed both compounds having immunosuppressive activity.