Hg^2＋与Co^2＋,Cu^2＋,Mn^2＋,Pb^2＋,Zn^2＋的非有机溶剂萃取 …

目的：实现部分金属离子混合样品中Ｈｇ＾２＋的定量分离。方法：利用ＰＥＧ－ＥＢＴ－（ＮＨ４）２ＳＯ４体系对Ｃｏ＾２＋、Ｃｕ＾２＋、Ｍｎ＾２＋、Ｐｂ＾２＋、Ｚｎ＾２＋、Ｈｇ＾２＋混合溶液进行萃取分离。结果：在ＰＨ８－１０的ＮＨ４ＮＨ４ＣＩ水溶液中Ｃｏ＾２＋、Ｃｕ＾２＋、Ｍｎ＾２＋、Ｐｂ＾２＋、Ｚｎ＾２＋几乎被ＰＥＧ相完全萃取,而Ｈｇ＾２＋几乎不被萃取,从而获得Ｈｇ＾２＋与Ｃｏ＾２＋、Ｃｕ＾２＋、Ｍｎ＾     

OVEREXPRESSION OF p53, EGFR,C-ERBB2 AND C-ERBB3 IN ENDOMETRIOID CARCINOMA OF THE OVARY

Objectives. To determine overexpression of p53, EGFR, e-erbD-2 and e-erbB-3 in endometrioid carcinoma of the ovary and to evaluate the prognostic signiFtcance of these resdts, especially, eoexlsting overexpression of p53 and one of the member of type I growth factor receptor family. Methods. Overexpressions of the p53, EGFR, e-erbB-2 and e-erbB-3 protein were studied by immunohlstochemistry in paraffin-embedded tumor tissue from 28 patients with endometrioid carcinoma of the ovary. Results. 11 (39.3%), 13 (46.4%), and 14 (50. 0%) were stained positively with p53, e-erbB-2 and c-erbB-3 monoclonal ant/bodies. 13 (46. 4%) was stained positively with EGFR polyclonal antibody.There were no relationship between p53, EGFR, C-erbB-2, c-erbB-3 and histologic grade, lymph node metastasis. The percentage of tumors with over expression of p53, EGFR, C-erbB-2 and c-erbB-3 was higher in those with stage Ⅰ～Ⅱ tumors compared with those with stage Ⅰ, in patients with residual tumor after initial surgery compared with those without. A high survival rate was observed in patients without p53, EGFR, c-erbB-2 and c-erbB-3 overexpression respectively than those with. A highest survival rate was observed in patients with both p53 and one of EGFR, c-erbB-2 and c-erbB-3 negative compared with those both positive or either of both positive. Concltrsion. Overexpression of p53, EGFR, c-erbB-2 and C-erbB-3 resulted in a poorer prognosis respectively. Overexpression of both p53 and one of the EGFR, c-erbB-2 and e-erbB-3 is a worse prognostic indicator in patients with endometrioid carcinoma of the ovary.     

苯甲醛缩氨基硫脲与Cu^＋,Co^2＋,Ni^2＋,Zn^2＋,Mn^2＋（SCN）2配合…

本文合成了苯醛缩氨基硫脲（ＨＬ）与铜、锌、钴、镍、锰离子的五个配合物。测试了五个配合物对Ｓ１８０腹水癌细胞的抗癌活性，发现Ｃｕ（ＨＬ）ＳＣＮ和Ｚｎ（ＨＬ）２（ＳＣＮ）２对癌细胞有强的杀伤作用，配合物Ｃ（ＨＬ）ＳＣＮ和Ｚｎ（ＨＬ）２（ＳＣＮ）２剂量分别为５ｍｇ／ｋｇ和１０ｍｇ／ｋｇ时，地Ｓ１８０荷瘤小发鼠的存活时间延长率分别为５８．８２％和３８．２４％，对Ｓ１８０实体瘤的抑瘤率分别为７１．５７％和６     

EFFECTS OF THE HOE 694 ON TRANSIENTINWARD CURRENT AND NA＋－ CA2＋ EXCHANGE IN GUINEA PIG CARDIOMYOCYTES

OBJECTIVE: To determine the effects of HOE 694, a new and potent Na(+)-H+ exchanger blocker, on transient inward current (It(i)) and Na(+) - Ca(2+) exchange during hypoxia-reoxygenation in guinea pig cardiomyocytes. METHODS. Cardiomyocytes were isolated from adult guinea pig ventricle. Experiment was performed in an experimental chamber that allowed the cells to be exposed to a sufficiently low O2 pressure. The cells were subjected to hypoxia and reoxygenation. The ionic currents were studied with patch clamp technique. RESULTS: In the absence of HOE 694, hypoxia-reoxygenation induced It(i) in 12 of 15 experiments; but in cardiomyocytes pretreated with HOE 694 (10 approximately 50 micro mol/L), the incidence of It(i) observed during reoxygenation was reduced to 5 of 11 experiments and 3 of 10 experiments, P < 0.05 vs control respectively. The Na(+) - Ca(2+) exchange current was unaffected by HOE 694 under normoxic condition. However, when cells were pretreated with 10 micromol/L HOE 694 for 10 min, then subjected to hypoxia condition, the Na(+) - Ca(2+) exchange current significantly inhibited. CONCLUSIONS: Blockade of the Na(+)-H+ exchange by HOE 694 could reduce Ca(2+) overload upon hypoxia-reoxygenation, and inhibition of Na(+) - H+ exchange may also indirectly decrease Na(+) - Ca(2+) exchange activity during hypoxia.     

烧伤患者血清和水泡液Zn^2＋,Cu^2＋,Ca^2＋,Mg^2＋的动态变化

目的：动态观察了６２例烧伤患者血清和水泡液中Ｚｎ２＋、Ｃｕ２＋、Ｃａ２＋、Ｍｇ２＋的变化。方法：观察了大面积烧伤２８例（总面积７２．３％±２２．７％，Ⅲ度４７．５％±３１．４％），小面积３４例（总面积６．７％±４．３％，皆为Ⅱ度）。结果：发现大面积组伤后１ｄ血Ｚｎ２＋、Ｃｕ２＋、Ｃａ２＋、Ｍｇ２＋皆显著降低，３ｄＺｎ２＋、Ｃｕ２＋仍低，Ｃａ２＋在正常的低水平，Ｍｇ２＋始终都低。小面积组无明显变化。水泡液中富含Ｚｎ２＋、Ｃｕ２＋、Ｃａ２＋、Ｍｇ２＋，尤其Ｚｎ２＋、Ｃａ２＋明显高于大面积组血Ｚｎ２＋、Ｃａ２＋水平。结论：显示创面渗出是丢失各元素的重要途径     

EFFECTS OF CALDESMON, CALPONIN, AND TROPOMYOSIN ON THE MG^2＋ -ATPase ACTIVITIES OF SMOOTH MUSCLE MYOSIN

Objective To test whether in the absence of actin, actin-binding proteins such as caldesmon, calponin, and tropomyosin interact with the myosin of unphosphorylation, Ca^2 -dependent phosphorylation (CDP), and Ca^2 -independent phosphorylation (CIP) and stimulate myosin Mg^2 -ATPase activities. Methods Mg^2 -ATPase activities were measured to evaluate the effects of caldesmon, calponin, and tropomyosin on the myosin in unphosphorylation, CDP by myosin light chain kinase (MLCK), and CIP by MLCK. (1) At different incubation-time, i.e., 5, 10, 20, 40, and 60 minutes, the highest Mg^2 -ATPase activity was observed when myosin was in the state of CDP, the medium was CIP of myosin, and the lowest was the unphosphorylated myosin. (2) In the absence of caldesmon, calponin, and tropomyosin, the Mg^2 -ATPase activities from high to low were in the following order: CDP, CIP, and unphosphorylated myosin. However, in the presence of caldesmon, calponin, and tropomyosin, the order of relative value of Mg^2 -ATPase activities from high to low was unphosphorylated, CIP, and CDP of myosin respectively compared to the corresponding controls. Conelusions The results propose that caldesmon, calponin, and tropomyosin are capable of stimulating Mg^2 -ATPase activity of smooth muscle myosin in Ca^2 -independent manner, since Ca^2 is not obligating for the stimulating effects of the three proteins. The common characteristic of the three proteins is that when myosin activities are low, their activations are relatively strong and this property might be involved in smooth muscle tension keeping.     

IN VIVO DEGRADATION OF BLANK POLY D, L-LACTIDE-CO-GLYCOLIDE MICROSPHERES IN RATS

Blank PLGA (8: 2) microspheres were prepared, sired and sterilized by cobalt-60 radiation. The sterilized microspheres with diameters of 65-80 μm were then injected into rat thigh muscle and the rat was excised at various time intervals up to 6 months. The injected     

EFFECT OF EXCITATORY AMINO ACIDS．Ca~（2＋） ON DELAYED NEURONAL DEATH IN HIPPOCAMPUS FOLLOWING TRANSIENT FOREBRAINISCHEMIA IN GE

ＥＦＦＥＣＴＯＦＥＸＣＩＴＡＴＯＲＹＡＭＩＮＯＡＣＩＤＳ．Ｃａ~（２＋）ＯＮＤＥＬＡＹＥＤＮＥＵＲＯＮＡＬＤＥＡＴＨＩＮＨＩＰＰＯＣＡＭＰＵＳＦＯＬＬＯＷＩＮＧＴＲＡＮＳＩＥＮＴＦＯＲＥＢＲＡＩＮＩＳＣＨＥＭＩＡＩＮＧＥＲＢＩＬＳ￥ＸｕＣｈａｎｇｑｉ?..     

INVOLVEMENT OF THE Ca^2＋-PROTEIN KINASE C AND ADENYLATE CYCLACE SIGNAL PATHWAYS IN THE ACTIVATION OF THYMOCYTES IN RESPONSE TO WHOLE-BODY IRRADIATION WITH LOW DOSE X-RAYS

Objective. To study the molecular mechanism of the stimulatory effect of low dose radiation(LDR) on T cell activation. Methods. Thymocytes from Kunming mice exposed to whole-body irradiation(WBI) with different doses of X-rays were analyzed for the changes in signal molecules of the phospholipase C-phos-phatidylinositol biphosphate(PLC-IP2) and G protein-adenylate cyclase(AC) pathways. Results. It was found that[Ca^2 ]i increased in response to doses within 0. 2 Gy which was most marked after 0. 075 Gy and the increase was accentuated in the presence of Con A. The changes in CD3 and cal-cineurin (CN) expression of the thymocytes followed the same pattern as the alterations in [Ca^2 ]i after LDR. The expression of α,β1 and β2 isoforms of protein kinase C(PKC) was all up-regulated after 0. 075 Gy with the increase in PKC-β1 expression being most marked. The cAMP/cGMP ratio and PKA activity of the thymocytes was lowered after low dose radiation and increased after doses above 0. 5 Gy in a dose-de-pendent manner, thus giving rise to J-shaped dose-response curves. The Ca antagonist TMB-8 and cAMP stimulant cholera toxin suppressed the augmented thymocyte proliferation induced by LDR. Conclusion. Data presented in the present paper suggest that activation of the PLC-PIP2 signal path-way and suppression of the AC-cAMP signal pathway are involved in the stimulation of the thymocytes fol-lowing WBI with low dose X-rays.     

DETECTION OF POINT MUTATIONS IN EXON 2 OF THE G6PD GENE IN CHINESE G6PD VARIANT

ＤＥＴＥＣＴＩＯＮＯＦＰＯＩＮＴＭＵＴＡＴＩＯＮＳＩＮＥＸＯＮ２ＯＦＴＨＥＧ６ＰＤＧＥＮＥＩＮＣＨＩＮＥＳＥＧ６ＰＤＶＡＲＩＡＮＴＸｕＷｅｉｍｉｎｇ；（许卫明）ＷａｎｇＪｉｎｇ；（王菁）ＨｕａＸｉａｏｙｕｎ（华小云）ａｎｄＤｕＣｈｕａｎｓｈｕ（杜传书...     

LEVELS OF SEXUAL HORMONES IN RELATION WITH SYNDROME-DIFFERENTIATION OF TCM IN PATIENTS OF CHRONIC RENAL FAILURE

Determinations of plasma levels of sexu-al hormones in 43 male patients of chronicrenal failure showed that the content oftestosterone(T)decreased markedly,whileestradiol(E_2)and E_2/T ratio were obviouslyhigher than in normal subjects,with no signif-icant correlation between the levels of thesesexual hormones and renal function.Accord-ing to syndrome-differentiation of TCM,17     

DIOPTER REGRESSION ANALYSIS OF LASER IN SITU KERATOMILEUSIS IN THE TREATMENT OF MYOPIA

Objective To evaluate the relevant factors of regression phenomenon of laser in situ kerato-mileusis (LASIK) for treatment of myopia. Methods We studied 408 eyes of 250 myopic patients who received LASIK. Patients were divided into 2 groups according to preoperative diopters (- 6 .00D- -10 .00D, 194 eyes;-10.10D- -15 .00D, 214 eyes). Mean period of follow-up were 12 months and the results were statistically analyzed. Results 12 months after surgery, in the first group (- 6.00--10.00D) the regressionequal to or beyond -1 .0D were 21 eyes (10.8%), range from -1 .0D to - 3 .0D. The average regression was -1.33D. In the second group (- 10 .10D - - 15 .00D) regression equal to or beyond -1.0D were 78 eyes (36.5%), range from -1 .0D to -5.50D. The average regression was -1 .99D. Conclusion The results indicate that excimer LASIK can be used to treat myopia between -6 .00D-- 15 .00D effectively with minimal regression within 12 months. Preoperative thin corneas with intraoperative small ablation zone could ind     

PREPARATION AND EVALUATION OF, NORETHISTERONE／POLY D, L-LACTIDE-CO-GLYCOLIDE MICROSPHERES IN VITRO AND IN VIVO

Biodegradable poly d, l-lactide 90-co-glycolide 10 was used to prepare microspheres containing 20% NET by solvent evaporation method. The drug content and morphology of the prepared microspheres were affected by the initial PLGA concentration in     

OCCURRENCE OF THE LUNG FLUKE, PARAGONIMUS HETEROTREMUS IN MANIPUR, INDIA

Objectives. To determine the natural crustacean host, the Paragonimus species, and to investigate the potential host-parasite relationship between Manipur Paragonimus and some of the laboratory animals.Methods. The laboratory animals such as puppies, albino rats and Swiss mice were infected orally with metacercariae isolated from the fresh water crabs, Potamiscus manipurensis. The fecal specimens of the experimentally infected animals were examined microscopically for Paragonimus eggs at regular intervals. The animals were autopsied on days 35 - 328 after infection and the isolated worms were flattened between glass slides and fixed in 70% alcohol. The worms were stained with carmine and mounted with Canada balsam for morphological studies. The eggs were collected in 5% formol saline solution for microscopy. The flukes were classified into 4 developmental stages.Results. A total of 11 worms, 5 mature, 5 immature and 1 pre - adult were recovered. The morphological features of the metacercariae, worms and     

THE ROLE OF β-ENDORPHIN IN THE MECHANISMS OF ISCHEMIC ARRHYTHMIA IN RATS

ＴＨＥＲＯＬＥＯＦβ－ＥＮＤＯＲＰＨＩＮＩＮＴＨＥＭＥＣＨＡＮＩＳＭＳＯＦＩＳＣＨＥＭＩＣＡＲＲＨＹＴＨＭＩＡＩＮＲＡＴＳＨｅＢｅｎ（何奔）；ＺｈｅｎｇＤａｏｓｈｅｎ（郑道声）；ＺｈａｎｇＳｈｉｈｕａ（张世华）；ＷｕＹｉｘｉａｎ（邬亦贤）（Ｄｅｐａｒ...     

THE ANALYSIS OF NF2 GENE MUTATION IN SPORADIC SCHWANNOMAS

Ｒ啨ｓｕｍ啨　　 Ｏｂｊｅｃｔｉｆ　Ａｎａｌｙｓｅｒｌａｍｕｔａｔｉｏｎｄｕｇ埁ｎｅＮＦ2 (ｅｘｔｒｏｎ 2 ,4,6ｅｔ 13)ｃｈｅｚｌｅｓｓｃｈｗａｎｎｏｍｅｓ.Ｍ啨ｔｈｏｄｅｓ　Ｌａｍｕｔａｔｉｏｎｄｕ ｇ埁ｎｅＮＦ2ｃｈｅｚ 36ｓｃｈｗａｎｎｏｍｅｓ啨ｔａｉｔｏｂｓｅｒｖ啨ｅ ｐａｒＰＣＲ ＳＳＣＰｅｔｌ ａｎａｌｙｓｅｓ啨ｑｕｅｎｔｉｅｌｌｅｄｅｌ ＡＮＤ .Ｌ ｉｎｄｉｃｅｄｅ ｐｒｏｌｉｆ啨ｒａｔｉｏｎｄｕｓｃｈｗａｎｎｏｍｅ啨ｔａｉｔｄ啨ｔｅｃｔ啨 ｐａｒｌ ｉｍｍｕｎｏｈｉｓｔｏｃｈｉｍｉｅ .Ｒ啨ｓｕ…     

DETECTION OF POINT MUTATIONS IN EXON 2 OF THE G6PD GENE IN CHINESE G6PD VARIANTS

In the past few years,a total of 6 different mutations of the G6PD gene have been reported in china.One of these,the C6 mutation(A^95→G),accounted for about 15.4％ of the Chinese G6PD variants.In ordet to develop a strategy for rapid detection of mutation-containing exons of the G6PD gene,we applied the single-strand confor-mation polymorphism(SSCP)technique to the detection of mutations in exon 2 of this gene.We observed four pa-tients with abnormal migration patterns of the exon 2 band among 20 cases of G6PD variants.Direct PCR se-quencing confirmed a Tto C substitution in exon 2 that has previously been reported.This procedure is therefore of particular importance for the rapid detection of mutation-containing exons in the G6PD gene.