AIM: To observe the pathological role of 3-nitrotynosine (3-NT) on Escherichia coli LPS-induced vascular hyporeactivity in rats and the therapeutic effect of antioxidants. METHODS: Forty male SD rats weighting from 200 g to 250 g were randomly divided into four groups: the control group (n=10); LPS shock group (n=10); uric acid-treated group (n=10); melatonin-treated group (n=10). 6 h after LPS shock, phenylephrine (0.5-2.5 ?g?kg -1) was applied intravenously to all groups and the percentage increase in MAP was detected, respectively. The concentration-response curve of aorta rings from all groups rats were obtained by cumulative addition of phenylephrine (PE), and PE E_ max, EC_ 50 were calculated. The concentrations of plasma malondialdehyde (MDA), nitrate/nitrite and 3-NT were assayed in all groups 6 h after LPS shock. RESULTS: The MAP level induced by PE significantly decreased to 54.60% in LPS shock rats compared with the control (P

It is of essential importance for college students to think creatively. Flexible teaching methods have been adopted during the teaching of medical writing in our university. We inspired, guided, stimulated students to develop their creative thought. The purpose of the article is to develop the creative thought of the students in medical universities.

The concepts of Western medicine in treating tumor have changed markedly in recent years, and begun to put more emphasis on the whole survival status of patients. With recent emergence of targeted drugs, it was found that curative effects of the same targeted drugs in treating patients with the same tumor type even the same tumor pathological subtype but different therapeutic targets may be different. On the contrary, the curative effects of different targeted drugs in treating patients with different tumor types but the same therapeutic targets may be similar. Accordingly, the viewpoint of personalized therapy is advocated in Western medicine. Under the guidance of syndrome differentiation treatment in traditional Chinese medicine (TCM), patients with the same tumor and different syndromes should be treated by different herbs, and patients with different tumor and the same syndrome should be treated by the same herbs. Both the theories of "the same treatment for the same syndrome" and "the same treatment for the same therapeutic target" indicate that personalized therapy in Western medicine is similar to TCM syndrome differentiation treatment. The article focuses on "different treatments for the same disease" as well as "the same treatment for different diseases" to describe the similar points between personalized therapy and TCM syndrome differentiation treatment and thereby proves that TCM syndrome differentiation treatment is a scientific and essential approach in treating tumor. At the same time, the article also points out the problems and solution methods of TCM syndrome differentiation treatment.

Objective We aimed to develop a safe, comfortable and effective perineal washer, which prevent perineum wound from infection and improve the healing of perineal wound. Methods The perineal washer was made from high polymer medical material, including two metal catheters, pressing gasbag, medical yoke and dicty blow head. We divided women patients after vagina delivery with perineum wound or after caesarean section into the observation group and the control group randomly with 120 cases in each group from Janurary to October 2007. The control group was given perineal washing by routine washing pot and cotton ball with forceps. The observation group received perineal washing by perineal washer with cleaning fluid and was scrubbed by sponge brash. The elimination of wood swelling, the healing of perineum healing, the urinary infection for patients with indwelling urinary catheterization and patients comfort degree were observed in the two groups. Results Statistical difference existed between the two groups in such aspects, elimination of wound swelling wound healing urinary tract infection and patients comfort degree, P<0.05 or P<0.01. Conclusions Adoption of self designed perineal washer accompanied with sponge brush could completely delete bacteria and inflammatory secretion deep in the vagina and prevent the incidence of infection. It not only could hasten the elimination of wound swelling, alleviate the pain and wound healing, but also was easily developed and portable to use. It provided a new and effective method for perineal washing and is worth clinical application.

Objective To investigate the effective nursing measures of reducing the complications of intratra-cheal suction about mechanical ventilation patients to improve airway nursing quality. Methods 80 patients with ar-tificial air passage mechanical ventilation were divided into Control group (Group one, 40 cases) and Testing group (Group two, 40 cases) randomly. In the control group, suck at regular time after injecting normal saline solution in-to the in-airway (in order to diluted the sputum). There are improvement that nursing measures in testing group. For sample, suck sputums according to demands, choose appropriate sucking sputums tube, control the deepth of sucking sputum tube, adjust the negative pressure based on the deepth of sucking sputum tube, give pure oxygen two to three minutes before and after the suction, strengthen the airway humidfication, lubricate the sucking sputum tube with chlorotetracycline eye ointment, etc. Complications of intratracheal suction were compared in two groups. Results The comparison showed that the complications have a significant statistical difference in sputum obstruction, SpO2 de-scending to 80 percent and below during suction and airway mucous membrane traumatic hemorrhage. (P < 0.01). Conclusion The improved intratracheal suction will decrease the complications obviously like sputum obstruction, SpO2 reducing to 80 percent and below during suction and airway mucous membrane traumatic hemorrhage.

Objective:To investigate the effects and mechanism of Ginseng polysaccharides (GPS) on glycosaminoglycan synthesis in rat chondrocytes in vitro.Methods:Chondrocytes isolated from knee joint cartilage of rats were subcultured.After monolayers were established,chondrocytes induced by 20 ng·ml-1 IL-1β were treated with GPS respectively at the concentration of 2,10 and 50 ng ·ml-1for 48 h.The effects of GPS on chondrocytes were analyzed using MTT assay for chondrocyte proliferation and 1,9-dimethylmethylene blue assay for GAG content.mRNA content in xylosyltransferase-Ⅰ(XylT-Ⅰ),galactosyltransferase-Ⅰ(GalT-Ⅰ),galactosyltransferase Ⅱ(GalT-II) and galactose-β-1,3-glucuronosyltransferase Ⅰ(GlcAT-Ⅰ) and that in matrix-degrading enzymes matrix metalloproteinases-3 (MMP-3) and aggrecanase-1and aggrecanase-2 was also detected.Results:GPS had no toxic or proliferating effect on chondrocytes at all observed concentrations.GPS at the concentrations of 10 ng·ml-1 and 50 ng·ml-1 up-regulated GAG synthesis (P<0.01).10 ng·ml-1 GPS enhanced the mRNA expression of XylT-Ⅰ (P<0.01),and 50 ng·ml-1 GPS enhanced the mRNA expression of XylT-Ⅰ,GalT-Ⅰ and GalT-II (P<0.05,P<0.01).GPS did not inhibit the mRNA expression of matrix-degrading enzymes MMP-3 and aggrecanase-1and aggrecanase-2 enhanced by IL-1β.Conclusion:GPS can improve GAG synthesis in IL-1β stimulated chondrocytes in vitro,which is due to the expression promotion of GAG synthesis enzymes without the expression inhibition of matrix-degrading enzymes.

Objective:To study the biological functions of bone marrow macrophage (BMM ?) and to establish the methodology of separation, purification, cultivation and identification of BMM ?.Methods:Using the techniques of anchorage-dependent culture of separated rat bone marrow cell (rBMC) in DMEM culture media (contain 20% horse serum,20% (v/v)L 929 conditioned media) in vitro,a lot of purified anchor cells were obtained, and these cells were identified with specifically biological marker of macrophage, such as 1, morphologicalobservation:invert phase contrast microscopy, light and electron microscopy;2, enzyme cytochemistry:acid phosphatase (ACP),?-acetic acid naphthol esterase (?-ANE);3,phagocytic experiment:phagocytosis of chicken erythrocytes and prepared Chinese ink;4,immunocytochemistry: surface specific antigen of macrophage ( CD 68 stain).Results:The cells were purified having functional satisfactory macrophage according to morphological observation,enzyme cytochemistry, phagocytic experiment and immunocytochemistry.Conclusion:This is a simple and easy method for separation, purification, cultivation and identification of rat marrow macrophage.

Objective: To investigate the relationship between rater-ratee similarities/differences in some individual characteristics and organizational citizenship behavior(OCB) appraisal. Methods: 103 vertical dyads were assessed by Personality Scale for Enterprise Managers and Chinese OCB Scale. Results: There existed significantly positive correlations between similarities in seven demographic indices and other-oriented OCB dimensions; differences in personality traits correlated significantly negatively with some dimensions of OCB appraisal; age difference had non-liner regression relationship with other-oriented OCB dimensions.Conclusion: Similarities/differences of individual characteristics related closely with OCB appraisal.

By mean of the isolated perfused working heart model, the changes of myocardial contractile and relaxation functions, ventricular cell action potentials, myocardial oxygen and glucose consumptions etc. were observed at 1st,3rd, 8th and 24th h after burn injury in the guinea-pigs inflictedly III degree burn injury on 35% TBA. The results indicate that. 1 ) The contractile and relaxation functions go through a time course of 'normal-decrease-recover', i.e. the cardiac functions show a normal level within 1 h after burn injury. Then they are depressed gradually,and to the lowest at 8th h or so, after burn injury. The cardiac functions recover partly at 24th h after burn injury. It suggests that there is a repaired mechanism by itself in heart of the burn animal; 2 ) The depression of myocardial contractile and relaxation functions are related with depression of the oxygen consumption rather than reduce of intaking in nutrients; 3) the influencing factors of burn injury on the coronary flow and electrical activity of myocardial cells could be removed easily by the perfusate. It shows that these effects may be result from the extracardiac neurohumoral factors.

This paper aims at investigating the content of classroom-texture of the teaching cases in analytical chemistry and the basic patterns in the organization aching.Case-study method adopted in the teaching of analytical chemistry can help to train students' ability of analyzing and solving practical problems,hence motivating their comprehensive qualities.