Your browser doesn't support javascript.
Mostrar: 20 | 50 | 100
Resultados 1 - 6 de 6
Mais filtros

Base de dados
Intervalo de ano de publicação
Food Chem ; 368: 130651, 2022 Jan 30.
Artigo em Inglês | MEDLINE | ID: mdl-34392117


Bovine serum albumin (BSA) and BSA-glucose conjugates (GBSAⅠ and GBSAⅠI) with different extent of glycation were complexed with curcumin (CUR). The formation mechanism of BSA/GBSA-CUR complexes and the effect of glycation on their physicochemical properties were investigated. Fluorescence quenching and FTIR analysis indicated that the BSA/GBSA-CUR nanocomplexes were formed mainly by hydrophobic interactions. XRD analysis demonstrated that CUR was present in an amorphous state in the nanocomplexes. BSA with a greater extent of glycation (BSA < GBSAⅠ

Curcumina , Glicosilação , Interações Hidrofóbicas e Hidrofílicas , Soroalbumina Bovina
Food Chem ; 368: 130768, 2022 Jan 30.
Artigo em Inglês | MEDLINE | ID: mdl-34392120


Apoptosis plays a critical role in sea cucumber autolysis. To investigate the ultraviolet (UV)-induced apoptosis, sea cucumbers with and without injection of BAPTA-AM (cytosolic calcium chelator) were exposed to UV (15 W/m2) for 30 min. The results showed that UV irradiation caused several changes in sea cucumber coelomocytes, including calcium imbalance, abnormal morphology of endoplasmic reticulum, upregulation of pro-apoptotic proteins CRT, CHOP, and caspases 9 and 3, and downregulation of anti-apoptotic protein Bcl-2. A comparison between the two groups showed that injection of the calcium chelator into sea cucumbers helped maintain coelomocyte intracellular calcium homeostasis and suppressed other abnormal changes caused by ER stress, indicating apoptosis in sea cucumbers is mediated by calcium imbalance and follows the activation of the ER stress pathway. Therefore, this study broadens understanding of the apoptotic mechanism involved in sea cucumber autolysis, which is helpful in developing preservative agents for sea cucumbers.

Pepinos-do-Mar , Stichopus , Animais , Autólise , Cálcio , Homeostase
J Xray Sci Technol ; 21(2): 317-22, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23694919


The aims of this study were to evaluate the diagnostic value of adenosine thallium-201 myocardial perfusion imaging and to compare it with exercise stress thallium-201 myocardial perfusion imaging for detecting coronary artery disease (CAD) at an early stage. Forty-one patients suspected with CAD were randomly divided into two groups. In Group 1 (n=21) adenosine stress was undertaken; the exercise stress myocardial perfusion imaging was performed in Group 2 (n=20). Coronary angiography (CAG) was performed in each patient within 2 weeks before or after single photon emission computed tomography (SPECT). Adenosine stress group vs. exercise stress group, the sensitivity was 92.86% vs. 100.0%, specificity 57.14% vs. 60.0%, positive predictive value 81.25% vs. 71.43%, negative predictive value 80.0% vs. 100.0%, accuracy 80.95% vs. 80.0% respectively. Detection rates of vessels of coronary artery lesions were 66.67% in Group 1 and 72.22% in Group 2 (P> 0.05). The side effects were mild and transient. Our results demonstrated that adenosine stress myocardial perfusion imaging is a safe and reliable diagnostic method for an early stage of CAD. As a comparative sensitivity and accuracy with exercise stress thallium-201 myocardial perfusion imaging, adenosine stress testing may provide a feasible alternative pharmacological stress method in myocardial SPECT for detection of CAD.

Adenosina , Doença da Artéria Coronariana/diagnóstico por imagem , Imagem de Perfusão do Miocárdio/métodos , Radioisótopos de Tálio , Adenosina/efeitos adversos , Idoso , Pressão Sanguínea , Teste de Esforço/métodos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Sensibilidade e Especificidade , Radioisótopos de Tálio/efeitos adversos
World J Gastroenterol ; 14(8): 1212-7, 2008 Feb 28.
Artigo em Inglês | MEDLINE | ID: mdl-18300346


AIM: To assess the ability of (18)F-fluorodeoxyglucose positron emission tomography/computer tomography ((18)F-FDG PET/CT) to differentiate between benign and malignant portal vein thrombosis in hepatocellular carcinoma (HCC) patients. METHODS: Five consecutive patients who had HBV cirrhosis, biopsy-proven HCC, and thrombosis of the main portal vein and/or left/right portal vein on ultrasound (US), computer tomography (CT) or magnetic resonance imaging (MRI) were studied with (18)F-FDG PET/CT. The presence or absence of a highly metabolic thrombus on (18)F-FDG PET/CT was considered diagnostic for malignant or benign portal vein thrombosis, respectively. All patients were followed-up monthly with US, CT or MRI. Shrinkage of the thrombus or recanalization of the vessels on US, CT or MRI during follow-up was considered to be definitive evidence of the benign nature of the thrombosis, whereas enlargement of the thrombus, disruption of the vessel wall, and parenchymal infiltration over follow-up were considered to be consistent with malignancy. (18)F-FDG PET/CT, and US, CT or MRI results were compared. RESULTS: Follow-up (1 to 10 mo) showed signs of malignant thrombosis in 4 of the 5 patients. US, CT or MRI produced a true-positive result for malignancy in 4 of the patients, and a false-positive result in 1. (18)F-FDG PET/CT showed a highly metabolic thrombus in 4 of the 5 patients. (18)F-FDG PET/CT achieved a true-positive result in all 4 of these patients, and a true-negative result in the other patient. No false-positive result was observed using (18)F-FDG PET/CT. CONCLUSION: (18)F-FDG PET/CT may be helpful in discriminating between benign and malignant portal vein thrombi. Patients may benefit from (18)F-FDG PET/CT when portal vein thrombi can not be diagnosed exactly by US, CT or MRI.

Carcinoma Hepatocelular/diagnóstico , Carcinoma Hepatocelular/terapia , Fluordesoxiglucose F18/farmacologia , Neoplasias Hepáticas/diagnóstico , Neoplasias Hepáticas/terapia , Veia Porta/patologia , Tomografia por Emissão de Pósitrons/métodos , Trombose/patologia , Tomografia Computadorizada por Raios X/métodos , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Imageamento por Ressonância Magnética/métodos , Masculino , Pessoa de Meia-Idade
World J Gastroenterol ; 13(40): 5413-5, 2007 Oct 28.
Artigo em Inglês | MEDLINE | ID: mdl-17879420


Hepatocellular carcinoma (HCC) is one of the most common primary cancers in the world. Surgery is the gold standard for treatment of patients with HCC. Recurrence and metastasis are the major obstacles to further improve the prognosis of HCC. Most recurrences are intrahepatic. However, 30% of the recurrences are extrahepatic. The role of resection in intrahepatic recurrences is widely accepted. The role of resection in extrahepatic HCC recurrence and metastasis is not well established. 18F fluorodeoxyglucose (18F-FDG) positron emission tomography/computer tomography (PET/CT) is useful in detecting distant metastasis from a variety of malignancies and shows superior accuracy to conventional imaging modalities in identification of intrahepatic and extrahepatic metastasis. We present one patient with one new isolated omental lymph node metastasis, who had a history of huge HCC resected six years ago. The metastatic focus was identified with 18 F-FDG PET/CT and resected. The follow-up revealed good prognosis with a long-term survival potential after resection of the omental lymphatic metastasis.

Carcinoma Hepatocelular/patologia , Neoplasias Hepáticas/patologia , Metástase Linfática/diagnóstico por imagem , Feminino , Fluordesoxiglucose F18 , Humanos , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/diagnóstico , Recidiva Local de Neoplasia/cirurgia , Tomografia por Emissão de Pósitrons , Prognóstico , Radiografia , Tomografia Computadorizada de Emissão
Nan Fang Yi Ke Da Xue Xue Bao ; 26(5): 680-2, 2006 May.
Artigo em Chinês | MEDLINE | ID: mdl-16762884


OBJECTIVE: To evaluate the clinical effect of eschar grinding and wound coverage by biological dressing A in the management of deep partial-thickness burn wound on the extremities. METHODS: Seventy-three patients with deep partial-thickness burns on the extremities were divided into two groups to receive different managements. The patients in group 1 were treated with eschar grinding and wound coverage with biological dressing A, and group 2 received conventional treatment. The white blood cell count, body temperature, incidence of wound infection and wound healing time were observed. RESULTS: Compared with conventional treatment, wound management with eschar grinding and coverage by biological dressing A could increase the effective rate (29/32 vs 31/41, P<0.05), inhibit systemic inflammation and scar hypertrophy, and shorten the wound healing time (13.79-/+5.72 vs 17.08-/+8.39, P<0.01). CONCLUSION: Eschar grinding and wound coverage by biological dressing A can be effective for management of deep partial-thickness burns on the extremities, and earlier treatment with the dressing A achieves better effect.

Curativos Biológicos , Queimaduras/cirurgia , Desbridamento/métodos , Queimaduras/patologia , Queimaduras/prevenção & controle , Cicatriz/prevenção & controle , Desbridamento/instrumentação , Extremidades , Feminino , Humanos , Masculino , Fatores de Tempo , Resultado do Tratamento