Biomedical subjects

Lei Li

Publications and source records attributed to Lei Li.

237 records · Page 14Linked to original sources

PubMed2002

[Geostatistical analysis on spatial patterns of Erythroneura sudra and Erigonidium graminicola].

The spatial construction and distribution of Erythroneura sudra and Erigonidum gramimicola at different periods were investigated with geostatisics. The results showed that the semivariogram of Erythroneura sudra was described by spherical model, indicating an aggregated spatial arrangement. The range was 25.71-37.14 m. The semivariograms of Erigonidum graminicola was fitted by spherical model too, also indicating an aggregated spatial arrangement, and its range was 25.12-44.06 m. The amount and spatial distribution of Erigonidium graminicola was closely related to that of Erythroneura sudra. It reveals that Erigonidium graminicola is the dominant natural enemies influencing the population of Erythroneura sudra.

Animals↗

PubMed2000

Experimental study of Tong Xia purgative method in ameliorating lung injury in acute necrotizing pancreatitis.

AIM:To investigate the role of tumor necrosis factor (TNF) in lung injury during acute necrotizing pancreatitis (ANP), and the therapeutic effect of Tong Xia purgative method in minimizing the severity of lung injury.METHODS:Fourteen canines were randomly divided into 3 groups:the Tong Xia treatment group (n = 5) using Dachengqitang; saline control group (n = 5), and the sham operation group (n =4). TNF activity in serum and in bronchoalveolar lavage fluid (BALF), the serum endotoxin levels were measured,and the severity of lung injury evaluated.RESULTS:Elevation of TNF activity was more prominent in BALF than in serum. TNF activity in serum at 6 and 12 hours and in BALF was significantly decreased in the Tong Xia treatment group than in the saline control one (q = 21.11, q = 12.07, q = 9.03, respectively, P <0.01) and the lung injury was significantly alleviated at 12 hours as compared with that in the saline group, manifested as amelioration of the lung wet/dry weight ratio, decrease in protein concentration and neutrophils count in BALF, and improvement of pulmonary inflammatory changes. A positive correlation was demonstrated between serum TNF activity and endotoxin level.CONCLUSION:Hypersecretion of TNF is shown to be one of the major causes of lung injury during ANP; Tong Xia purgative method could alleviate the degree of lung injury mediated by TNF.

Journal Article↗

PubMedDate not supplied

Pleomorphic adenoma of the salivary glands: analysis of 94 patients.

UNLABELLED: Pleomorphic adenoma is a benign epithelial tumor of adenoid structure preferentially arising from the parotid gland. It was shown that complete tumor excision is a curative measure and recurrence is likely in incompletely excised tumors. The aim of this study was to analyse the outcome of patients with pleomorphic adenoma from salivary glands in order to evaluate the surgical strategy of a single institution. MATERIALS AND METHODS: The files of 94 patients were evaluated. Special attention was given to the development of malignancy in pleomorphic adenoma. RESULTS: The pleomorphic adenoma preferentially originated in the parotid gland (n=73; right 48, left: 25), and rarely in other glands. The tumor occurred more often in females than in males (45:28, parotid). In 73 patients a slowly growing swelling of the parotid was first noted, which was located at different sites within the gland. At least one recurrence was noted in 18 patients, the majority of them aged 50 to 70 years (n=12). Malignant transformation to carcinoma was found in 8.5%. CONCLUSION: Pleomorphic adenoma from salivary glands is a benign tumor. However, in a noteworthy number of patients, inside the benign tumor a phenotype develops with distinct properties of malignancy. Surgery with safety margins is the therapy of choice. Multinodular tumors are prone to recurrent disease.

Adenoma↗