术中应用丝裂霉素C预防翼状胬肉术后复发的疗效观察

OBJECTIVE: To explore the feasibility of intraoperative application of mitomycin C (MMC) in pterygium and observe the ultrastructure change of pterygium with or without intraoperative application of MMC. METHODS: Sixty two eyes of 57 patients with primary pterygium were randomly divided into MMC group and control group, 29 patients (32 eyes) in MMC group underwent transposition with intraoperative application of MMC (0.4 mg.ml-1 for 1 minute), whereas 28 patients (30 eyes) in control group underwent transposition. The recurrence rate, complications and side effects were observed and compared between the two groups. The ultrastructure of pterygium with or without intraoperative application of MMC was studied with transmission electron microscopy. The mean follow-up was(7.6 +/- 3.4) months (1-13 minths). RESULT: Eleven eyes of the 30 eyes in control group (36.%) showed recurrence, whereas only 2 of 32 eyes (6.3%) in MMC group showed recurrence (P < 0.005). No severe complication and side effect appeared during the follow-up. Most of fibroblasts in pterygium that underwent intraoperative MMC occurred the change of rough endoplasmic reticulum (RER) dilatation. CONCLUSION: Intraoperative MMC appears to be an effective treatment in preventing recurrence of primary pterygium. The fibroblasts in pterygium have RER dilatation after application of MMC for 1 minute during the operation.     

3T3—L1脂肪细胞中高糖诱导胰岛素抵抗的分子机制

We investigated the cellular effect of high glucose using 3T3-L1 adipocytes on glucose transport activity, the expression of insulin signaling proteins and IRS1 tyrosine phosphorylation. Results showed that adipocytes treated with different high glucose (10, 15 and 25 mmol.L-1) for 24 hours showed to impair the basal and insulin-induced increase in glucose uptake in a dose-dependent manner and decreased significantly IRS1 tyrosine phosphorylation. High concentration of glucose produced opposite effects on IRS1 and IRS2: down-regulated IRS1 protein expression level and tightly up-regulated IRS2 contents. p85 and PKB were unaffected. Chronic exposure to high glucose can inhibit glucose uptake and induce insulin resistance. The mechanism may be involved in affecting the expression of insulin signaling peptides and tyrosine phosphorylation.     

三类降压药物对高血压大鼠心肌细胞凋亡及左室重构的对比研究

目的：评价氯沙坦,福辛普利,氨氯地平对自发性高血压大鼠（SHR）心肌细胞凋亡及左室重构的效应,方法：将40只16周龄SHR随机分为氯沙坦治疗组（SHR－L）,福辛普利治疗组（SHR－F）,氨氯地平治疗组（SHR－A）及空白对照组（SHR－C）,采用末端脱氧核糖核苷酸转移酶介导dUTP缺口未端标记,放免及病理检查方法对SHR治疗8周,16周心肌细胞凋亡指数（APOI）,血浆和组织血管紧张素Ⅱ,（PAngⅡ,M AngⅡ）及左室重构指标检测。结果：（1）各治疗组治疗8周,16周收缩压均明显下降,组间差异无显著性;各治疗组左室重量（LVW）,左室重量指数（LVMI）均有显著性改善,SHR－F组治疗16周较其他两组LVMI显著减低。（2）仅SHR－F组治疗8周APOI显著性下降,治疗16周各治疗组APOI均有显著下降,尤以SHR－F组下降明显。（3）SHR－L组治疗8周及16周PAng Ⅱ,MAngⅡ显著增加。SHR－F组治疗8周MAngⅡ显著下降,治疗16周SHR－F,SHR－A两组MAngⅡ均明显下降,且前组较后组下降显著,但对PAngⅡ无明显影响。结论：3药物均能有效逆转心脏肥厚及抗心肌细胞凋亡,其中以福辛普利显著,上述作用可能是拮抗心肌组织肾素－血管紧张素－醛固酮系统的效应。     

丁咯地尔治疗糖尿病周围神经病变的临床研究

OBJECTIVE: To observe the effect of buflomedil on clinical symptom and nerve conduction velocity (NCV) of diabetic peripheral neuropathy patients. METHODS: 58 cases of diabetic patents with peripheral neuropathy were divided into diabetes group treated with buflomedil (DB) 100 mg.d-1 and diabetes control group (DP) treated with PGE1 200 micrograms.d-1. NCV was measured and peripheral nerve symtom was observed in two groups before treatment and after 2 weeks. RESULTS: NCV and peripheral nerve symptom were obviously improved both in DB group and DP group (P < 0.01). The effective rate were respectively 80.0% and 89.3% in DB group and DP group. The diversity was no significant in DB group and DP group (P > 0.05). CONCLUSION: buflomedil is an effective and safe drug for treating diabetic peripheral neuropathy patients.     

异丙酚小剂量咪唑安定联合镇静与胃镜检查

OBJECTIVE: To search for a sedative method that is more suitable for gastroscopy. METHODS: All of patients were randomly divided into control group and experimental group. The experimental group was treated with propofol and midazolam, the control group was treated with propofol alone. The cumulation dosage of propofol, sedative effect, variation of BP and SaO2 were observed in all patient. RESULTS: The cumulative dosage of propofol in the experimental group was lower than that in the control group [(73.21 +/- 18.67) mg and (117.23 +/- 21.57) mg respectively]; the oblivious degree in the experimental group was higher than that in the control group (95.65% and 80.00%); the onset time and the descendant range of BP and SaO2 were also lower in the experimental than those in the control group. There was not remarkable difference in sedative effect and veriviscont time between the control group and the experimental group. CONCLUSIONS: In such a rapid operation of gastroscopy, the dosage of propofol in the experimental group is obviously less than that in the control group, while it does not affect the effect of sedation, the diagnose and cure time in gastroscopy room, and has more security and less cost.     

缺血预处理抑制缺血再灌注所致兔在体心肌细胞凋亡

目的：为探讨缺血预处理对缺血再灌注过程中心肌细胞凋亡的影响。方法：将24只新西兰白兔制成在体心肌缺血／再灌注模型,并随机分成假手术对照组（P组）,缺血／再灌注对照组（IR组）,缺血预处理组（IP组）,结果：IP组心肌梗死面积与缺血面积的比率比IR组显著减少（P＜0．05）;凋亡指数IP组亦比IR组小（P＜0．01）,IR组心肌DNA Ladder形成明显,IP组DNA Ladder模糊不清,结论：缺血预处理对缺血／再灌注损伤中心肌细胞凋亡具有抑制作用。     

Externalization and internalization of cardiac endothelin receptors during different phases of sepsis in rat.

Objective. To study the redistribution ofendothelin- 1 (ET- 1 ) receptors in two subcellular organelles, the sarcolemreal membrane and the light vesicle, of rat heart during the progression of sepsis. Methods. Sepsis was induced by cecal ligation and puncture (CLP). ET1 receptor was assayed by using[125I]-ET1 binding. Marker enzyme activities, protein yield, and dry-to-wet weight ratio of cardiac membraneswere measured. Results. Septic rat heart exhibited two distinct phases: an initial hyperdynamic phase( 9h after CLP; early stage of sepsis) followed by a hypodynamic ( 18h after CLP, late stage of sepsis) phase. [125I]-ET1 binding study showed that during early stage of sepsis, the Bmax of ET1 receptors was increased by 30% in sarcolemma but decreased by 19% in light vesicles, while during late stage of sepsis, the Bmax was decreased by 24% in sarcolem-ma but increased by 38% in light vesicles. The total binding of sarcolemma and light vesicles was increased by 25% during early stage of sepsis but decreased by 17% during late stage of sepsis. Conclusions. These data indicated that ET1 receptors in the rat heart were externalized from light vesicles to sarcolemmal membranes during early hyperdynamic phase while internalized from surface membranes to intracellu-lar compartment during late hypodynamic phase of sepsis.     

ISOBUTYRAMIDE ACTIVATES TRANSCRIPTION OF HUMAN FETAL γ- AND MURINE EMBRYONIC εy-GLOBIN GENES

INTRODUCTIONDuringhumandevelopment,theexpressionofβ－likeglobingenesdisplaystwoswitches：fromembryonic（ε）tofetal（GγandAγ）duringearlydevelopmentandfromfetaltoadult（βandδ）aroundtheparturientperiod．Inadultlife,thefetalhemoglobin（HbF,α２γ２）islessthan１％oftotalhemoglobinandisrestrictedtoFcellswhichrepre－sentlessthan５％ofthebloodcells（１）．Stimulationorreactivationoffetalglobinexpressionhasbeenconsideredtobeapotentialmethodofamelioratingtheβhemoglobin－opathies．Ins…     

脊柱侧凸矫形钽氏棒内固定失败原因分析

目的：分析脊柱侧凸鲁氏棒矫形内固定术后内失败的原因,为今后应用鲁氏棒治疗脊柱侧凸提供有益的借鉴。方法回顾1989年1月至1999年3月收治的脊柱侧凸患者应用鲁氏棒矫形内固定者96例,其中由各种原因所致的内固定失败者15例。结果：分析造成内固定失败的原因为①术前软组织松解不充分;②矫形过程中拧紧内固定钢丝时用力不均匀;③内固定钢丝数量太少;④植骨的数量不足;⑤内固定的节段不正确;⑥下床活动太早。结论：应用鲁氏棒治疗脊柱侧凸仍然是一种行之有效的方法,但在术前准备、手术过程和术后处理时,应注意以上可能造成固定失败的因素。