Biomedical subjects

Xiu-ling Wu

Publications and source records attributed to Xiu-ling Wu.

2 recordsLinked to original sources

PubMed2003

[Change of eustachian tube surfactant of guinea pigs suffering from secretory otitis media].

OBJECTIVE: To observe the change of surface active agents of eustachian tube of guinea pigs suffering from secretory otitis media, to explore the effects of surface active agents on secretory otitis media. METHODS: To establish the animal model of guinea pigs suffering from secretory otitis media. To analyse the changes of biochemical component and activity of eustachian tube's surfactant, meanwhile; to observe surfactant change after ectogenic surfactant treatment. RESULTS: The main components of the surfactant decrease in the model group of guinea pigs suffering from secretory otitismedia, phosphatidylcholine (PC) is (19.9 +/- 1.7)%, phosphatidylethanolamine(PE) is (36.8 +/- 2.7)%, minimum surface tension (gamma min) is (18.5 +/- 2.4) mN/m, and PC is (25.7 +/- 2.1)%, PE is (43.7 +/- 3.8)%, (P < 0.001), and gamma min is (7.6 +/- 0.8) mN/m in normal group (P < 0.001). After giving Ectogenic surfactant treatment, PC and PE increase, PC is (23.3 +/- 2.2)%, PE is (42.5 +/- 3.6)%; gamma min reduce, it is (11.8 +/- 2.3) mN/m. CONCLUSIONS: The main biochemical components of the surfactant obviously decrease, the activity of the surfactant weakens in secretory otitis media of guinea pig. This study showed the treatment of Ectogenic surfactant is effective.

Animals↗

PubMed2002

[Endothelin-1 expression and quantitative analysis in astrocytomas].

BACKGROUND & OBJECTIVE: It is demonstrated that endothelin-1 (ET-1) is synthesized by and released from certain malignant tumor cells, and it plays an important role in growth and development of tumor. This study was designed to investigate the expression of ET-1 in astrocytomas and the relationship between the ET-1 quantity and the grades of astrocytomas. METHOD: ET-1 expression was determined in 70 astrocytoma specimens using Streptavidin-Peroxidase method and image analysis technology. RESULTS: The ET-1 expressed in all of astrocytomas, and the ET-1 expression was mainly located in the cytoplasm. The positive rates of ET-1 in grade IV and III astrocytomas (86.67% and 93.33%) were significantly higher than that in grade II, I and normal astrocytes(75.00%, 66.67%, and 37.50%) (P < 0.05). The results of image analysis on astrocytoma (grade IV, III, II, I and normal control: 0.1875 +/- 0.0227, 0.1516 +/- 0.0134, 0.1215 +/- 0.0116, 0.1048 +/- 0.0143, and 0.0717 +/- 0.0074, respectively) showed that the lower differentiation of astrocytoma, the higher ET-1 expression (P < 0.01). The expression of ET-1 was significantly correleted with the tumor grading (r = 0.863, P < 0.01). CONCLUSION: The ET-1 quantitative analysis may be used as a monitoring index of astrocytoma growing.

Adolescent↗