Based on the discussion of the present English teaching in medical colleges and universities in China,this paper clarifies the mission and task of English teaching in medical colleges and universities and proposes that medical colleges and universities should attach importance to the education goals and needs of the department,major and students in the information age.It is believed that a scientific,reasonable and perfect English curriculum can be achieved by integrating IT into English curriculum,applying individualized teaching mode and expanding course connotation.

AIM: To quantitatively detect the expression level of transforming growth factor-β1 (TGF-β1) and transforming growth factor-β2 (TGF-β2) genes in the retina of normal rat in order to determine the expression difference of TGF-β1 and TGF-β2 in retina.METHODS: The total RNA was isolated from which the first strand of cDNA was prepared. The mRNA levels of TGF-β1 and TGF-β2 were detected quantitatively by real time polymerase chain reaction (PCR).RESULTS: The mRNA levels of TGF-β1 and TGF-β2 were 0.0008±0.0003 and 0.0378±0.009, respectively. Expression of TGF-β2 was obviously higher than that of TGF-β1 in rat retina with statistical significance (t=12.37, P<0.001). The ratio of TGF-β2/TG-β1 was 55.00±26.61.CONCLUSION: QRT-PCR could specifically and accurately detect gene expression level in rat retina. In retina the TGF-β2 gene was expressed more abundantly than TGF-β1. It is suggested that TGF-β2 play an important role in retina diseases.

AIM: To quantitatively investigate transforming growth factor-β type Ⅰ receptor (TβRⅠ) and transforming growth factor-β type Ⅱ receptor (TβRⅡ) gene expressions in rat retina.METHODS: Sprague-Dawley rats were chosen in this research. Gene expression was detected quantitatively by reverse transcription polymerase chain reaction (RT-PCR) analysis. RESULTS: The expression level of TβRⅠ and TβRⅡ were 0.00034±0.00013 and 0.0001±0.00005, respectively. The expression level of TβRⅠ was obviously higher than that of TβRⅡ in the rat retina with statistical significance (P<0.01). The ratio of TβRⅠ/TβRⅡ was 3.9±1.7.CONCLUSION: Real time quantitative RT-PCR is an effective method to detect differential expression genes in retina. The change of TβRⅠ/TβRⅡ expression may play an important role in the pathogenesis of retinopathy, which could be further investigated in its significance in the development of proliferation retinopathy.

AIM: To detect the gene expression of TGF-β2 in retinas of diabetic rats at different stages, to observe and analyze the effect of TGF-β2 on the retinas of diabetic rats, to explore the role of TGF-β2 in pathogenesis of diabetic retinopathy (DR), and to provide experiment data and experience for further clinic studies.METHODS: Sprague-Dawley (SD) rats were used and retinas were dissected. The total RNA was isolated from which the first strand of cDNA was prepared. Diabetes mellitus was induced by a single intraperitoneal injection of 60mg/kg streptozotocin (STZ) and the rats were held without insulin treatment until sacrifice. Besides, agematched rats treated with saline were used as controls. Tail vein blood glucose was measured after 2 days and rats were considered hyperglycemic if blood glucose reading>16.7mmol/L. Animals with blood glucose level<16.7mmol/L were excluded from the study. The rats were killed at the 4th, 8th, 12th, 16th, 20th and 24th week respectively after hyperglycemic models were established. The retinas were separated and preserved in liquid nitrogen. The expressions of TGF-β2 gene mRNA were detected by reverse transcription PCR (RT-PCR).RESULTS: The RNA of rat retina was integrative enough to be used to further carry out PCR analysis. Compared with control groups, the expression of TGF-β2 mRNA in retinas of diabetic rats was up-regulated at the 4th week, but there was no statistical difference (P>0.05); it was down-regulated at the 8th week, and there was statistical difference (P<0.05); it was also down-regulated at the 12th week, and there was statistical difference (P<0.05); at the 16th week there was no statistical difference (P>0.05); it was up-regulated at the 20th week, but there was no statistical difference (P>0.05); it continued to be up-regulated at the 24th week, and there was statistical difference (P<0.05).CONCLUSION: Since the expression of TGF-β2 mRNA in retinas of diabetic rats was down-regulated at the 8th week and 12th week statistically, up-regulated at the 24th week statistically, it has obviously shown that TGF-β2 was down-and up-regulated through the period of DR. That is, its changes are diphasic with time. It may confirm that TGF-β2, with the characteristic of diphasic regulation, played an important role in DR. It is necessary to study it furthermore.

Objective To discuss the perioperative nursing care of patients who is going to receive interventional therapy for hepatic artery stenosis after liver transplantation and to provide useful reference for reducing surgery-related complication and for improving the prognosis of patients. Methods Based on the patient's condition and operative requirement,we provided effective nursing care for 20 patients who were admitted to receive the interventional therapy for hepatic artery stenosis after liver transplantation. The nursing care included preoperative preparation,postoperative nursing and medical guidance at the time of discharge. Results Interventional therapy was successfully performed in all 20 cases,and no hemorrhagic tendency or acute thrombosis occurred. Marked symptomatic improvement was obtained in all patients. Conclusion The interventional therapy is an effective treatment for hepatic artery stenosis after liver transplantation. Intensive perioperative nursing care can well prevent the occurrence of surgery-related complications and can surely improve the therapeutic results.

This paper first explains the contextual theory,then it analyses the contextual characteristics under network environment with multimedia.At last,according to systematic functional linguistics,it discusses the implications of how to take advantage of the contextual characteristics in College English teaching and learning.

Objective To design and apply a kind of controllable enema input apparatus in patients with spinal cord injury (SCI). Methods 20 SCI patients with chronic constipation were included. Their defecation time, nature of defecation and usage of enema of 5 times of defecation were recorded before and after using the new apparatus. Results There were significant differences in the defecation time, nature of defecation and usage of enema before and after using the new apparatus (P<0.05). Conclusion The application of the new controllable enema input apparatus may shorten the defecation time, improve the nature of defecation, and reduce the usage of enema in SCI patients with chronic constipation.

Objective To explore the early diagnostic marker and mechanism of the injury of in- testinal mucosal barrier induced by intestinal ischemia-reperfusion in rats.Methods Sixty male Wistar rats were randomly divided into six groups:the sham operation group(SO),the ischemia 15 minutes group(A),the ischemia 45 minutes group(B),the ischemia 45 minutes plus reperfusion 2 hours group (C),the ischemia 45 minutes plus reperfusion 6 hours group(D),and the ischemia 45 minutes plus reperfusion 12 hours group(E).Using clamping and then releasing superior mesenteric artery the model of intestinal ischemia-reperfusion in rats was made.The sham operation group only underwent laparotomy. At different time points after ischemia and reperfusion the levels of serum CK,LDH,D-lactate and intes- tinal fatty acid binding protein(IFABP)in each group were examined.The morphological changes of in- testinal tissues were observed with light microscopy.Results Compared with group SO,the level of se- rum IFABP in group A was(374.74?48.85)pg/ml,significantly higher(P＜0.01),but the level of CK,LDH and D-lactate had no significant difference(all P＞0.05).In group B,the level of CK was (1090.40?187.51)u/L,peaking at 45 minutes after ischemia,meanwhile,D-lactate and IFABP levels were significantly increased(P＜0.01,respectively).In group C,D-lactate and IFABP were (2.51?0.19)?g/ml and (1601.42?286.81 )pg/ml,respectively,peaking at 2 hours after reperfusion (P＜0.01).At 6 hours after reperfusion,compared with ischemia 45 minutes,CK level was significantly de- creased(P＜0.01),LDH had no significant difference(P＞0.05),but the levels of D-lactate and IF- ABP were(2.03?0.24)?g/ml and(1443.76?174.52)pg/ml,respectively,all sustained a high lev- el(P＜0.01 ).At 12 hours after reperfusion,D-lactate and IFABP levels were gradually decreased(P＜0.01).At 45 minutes after ischemia the morphological changes of intestinal mucosa could be observed. At 6 hours after reperfusion part of the mucous layer appeared necrotic,some intestinal mucosal cells shed to enteric cavity,and submucous layer had hyperemia and edema obviously.Injury scores of intestinal mucosa were significantly correlated to the serum level of D-lactate and IFABP,correlation coefficients were 0.456,0.612(P＜0.01).Conclusion The monitoring of serum IFABP combined with D-lac- tate is a early,sensitive and specific biochemical marker in the diagnosis of intestinal mucosal barrier in- jury after ischemia-reperfusion.

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0.05)and the differences of AUC 0～t ,T max and C max were not significant as verified by two-one sided t test.CONCLUSION:The relative bioequivalence of polyferose capsules is101.02%which indicates that polyferose capsule is a bioequivalent product of Niferex capsule.