Role of ILK in the dysfunction of myocardium contraction following hemorrhagic shock / 重庆医学

Objective To explore the effect of ILK on myocardium contraction following hemorrhagic shock .Methods With iso-lated cardiac papillary muscle and isolated heart ,the contraction of papillary muscle and hemodynamic parameters (left intraventricu-lar systolic pressure(LVSP) ,the maximal change rate of left intraventricular pressure were measured .Results Compared with nor-mal control hearts ,ILK activity ,contractile response of cardiac papillary muscle and hemodynamic parameter were decreased signifi-cantly gradually in shock heart at the 1 ,2 h(P<0 .05) ,and the change of ILK activity was positive correlative with contractile re-sponse and hemodynamic parametert .With ILK agonist [phosphatidylinositol(3 ,4 ,5)trisphosphate ,PLTP] the dysfunction of con-tractile response and hemodynamic parameter could be improved significantly (P<0 .05) ,while these improvement could be abol-ished by ILK specific inhibitor(P<0 .05) .Conclusion ILK play important role in the regulation of cardiac contractility following hemorrhagic shock .

Study on effect of different processing methods on seven main chemical components of wild and cultivated Paeonia lactiflora / 中国中药杂志

<p><b>OBJECTIVE</b>To study on the effect of different processing methods on the contents of seven major constituents in wild and cultivated Paeonia lactiflora, gallic acid, catechin, albiflorin, paeoniflorin, pentagalloylglucose, benzoic acid and paeonol, in order to provide reference basis for different efficacy and formation mechanism of Paeonia Radix Rubra and Paeonia Radix Alba.</p><p><b>METHOD</b>Wild and cultivated P. lactiflora were dealt with by four processing methods, direct drying, drying after boiling, drying after decorticating and boiling, and drying after boiling and decorticating. HPLC was use to simultaneously determine the contents of seven chemical constituents.</p><p><b>RESULT</b>Wild P. lactiflora showed notable higher content of paeoniflorin and catechin than cultivated P. lactiflora, whereas cultivated P. lactiflora showed higher content of albiflorin than wild P. lactiflora. Both of them were less affected by process methods in above three constituents. Drying after boiling, drying after decorticating and boiling, and drying after boiling and decorticating methods reduced the content of benzoic acid and paeonol to trace in both wild and cultivated P. lactiflora. Clustering analysis results showed that all processing methods assembled wild and cultivated P. lactiflora in 2 groups.</p><p><b>CONCLUSION</b>The content differences of Paeonia Radix Rubra and Paeonia Radix Alba are mainly caused by their own differences and less affected by processing methods.</p>

Testing methods for seed quality of Glycyrrhiza uralensis / 中国中药杂志

<p><b>OBJECTIVE</b>The aim of this study was to optimize the testing methods for seed quality, and to provide a basis for establishing seed testing rules and quality grading standard of Glycyrrhiza uralensis.</p><p><b>METHOD</b>Referring to the International Seed Testing Rules made by ISTA and Rules for agricultural seed testing (GB/T 3543-1995) issued by China, the seed quality of G. uralensis from different collection areas was measured.</p><p><b>RESULT AND CONCLUSION</b>The seed testing methods for quality items of G. uralensis, including sampling, purity analysis, verification of genuineness, weight of 1 000 seeds, percentage germination, moisture content and seed viability of G. uralensis had been initially established.</p>

Genetic variability and interrelationships of mainly quantitative traits in Glycyrrhiza uralensis cultivated population / 中国中药杂志

<p><b>OBJECTIVE</b>The main aim of the research was to evaluate genetic variability and interrelationships of mainly quantitative traits in 2-year population, and provide a basis for high-yield breeding of Glycyrrhiza uralensis.</p><p><b>METHOD</b>Four genotype G. uralensis population were transplanting in four different environment using complete randomized block design with three replication, and the 10 quantitative traits, including plant height (PH), stem diameter (SD), tiller number (TN), taproot length (TRL), root length (RL), root diameter (RD), diameter of 20 cm below the root head (D20), taperingness (TR), lateral root number (LRN) and root fresh weight (RFW) were measured in field.</p><p><b>RESULT</b>The difference among population for all evaluated traits were significant (P<0.05) through Duncan's multiple range tests, and the coefficient of variation of RFW and LRN were above 25%. The analysis of variance was used to evaluate the traits of four populations across to four different environment Genotype, environment and their interaction effect were significant (P<0.05) or highly significant (P<0.01) for mainly evaluated traits. Simple correlation between traits showed that PH, SD, LRN, RL, RD and D20 had highly significant (P<0.01) and positive correlation with RFW. Results of the path coefficient analyses showed that D20 had the greatest positive direct effect on RFW, followed by the traits of PH and RL.</p><p><b>CONCLUSION</b>Selection for increased D20, RL and PH would be the best indirect selection traits for increasing root yield. Meanwhile, ample genetic variability exists in the G. uralensis 2-year population, it could be used for breeding improvement of root yield.</p>

How to improve clinical skills of internal medical students in cardiology department under the new medical condition / 中华医学教育探索杂志

Teaching of clinical skills is an important bridging phase from preclinical medicine to clinical practice.It is also an important element of medical students'clinical skills training.According to the character of internal medical cardiology,we should enhance the training of their clinical thinking ability,medical communication competence,and clinical operating ability to get satisfactory teaching effect.

Effects of hydroxyethyl starch at different molecular weights on hemorrhagic shock in rats / 第三军医大学学报

Objective To compare the resuscitation effect of 6% hydroxyethyl starch (HES) of different molecular weight in normal saline on hemorrhagic shock in rats. Methods Hemorrhagic shock model was established in 50 SD rats by 45% hemorrhage,and then they were equally divided into 5 groups. The rats were administered with HES40/,HES130/,HES200/normal saline,Voluven or Haes. Their mean arterial blood pressure (MAP),left intraventricular systolic pressure (LVSP),the maximal change rate of left intraventricular pressure (?dp/dtmax) of hemorrhagic shock rat were observed. Meanwhile,the artery blood gas,the survival time and 24-hour survival rate were also observed. Results Similar hemodynamic parameters values were obtained in the rats treated with our HES and those with Voluven or Haes. HES130 and HES200 prolonged the survival time of shocked animals in comparison with HES40. Among the 3 types of HES,HES200 had the best effect,which is equivalent to Voluven and Haes. Conclusion HES of 3 molecular weights have beneficial effect on hemorrhagic shock,and HES200 exerts best.

Antishock effect of arginine vasopressin and its relationship with Rho kinase / 第三军医大学学报

Objective To investigate the relationship of antishock effect of arginine vasopressin(AVP) on hemorrhagic shock and its relationship with Rho kinase.Methods Hemorrhagic shock(40 mmHg for 2 h) Wistar rats were treated respectively by AVP(0.4 U/kg),Rho kinase specific inhibitor,Y-27632(30 ?g/kg),or these 2 reagents.The pressor effect of norepinephrine(NE) on these rats and the contractility of their isolated superior mesenteric artery(SMA) were observed.Isolated SMAs from hemorrhagic shock rats were adopted to observe the effects of AVP on vascular reactivity and calcium sensitivity and its relationship to Rho kinase with an isolated organ perfusion system.Results AVP at the concentration of 0.4 U/kg significantly improved the pressor effect of NE and the contractile response of SMA.While,Y-27632(30 ?g/kg) abolished these beneficial effects of AVP.The vascular reactivity and calcium sensitivity of SMA were significantly decreased following hemorrhagic shock.AVP at the concentration of 0.5 and 5 nmol/L significantly increased the decreased vascular reactivity and calcium sensitivity.These effects of AVP were abolished by Y-27632(10 ?mol/L).Conclusion Rho kinase may take part in the action of AVP on hemorrhagic shock via improving shock induced vascular hyporeactivity and calcium desensitization.

Histological and enzymohistochemical observation of experimental muscle sprain / 中国组织工程研究

Method We used biomechanical methods in controlling strain of anterior tibial muscles of rabbits .Objective To observe the histological and enzymohistochemical change after sprain.Result Experimental model of muscle sprain could be made with yield load which was about 128% of the body weight extracting anterior tibial muscle of the rabbits.Some of the muscle fibers broke near the junction between muscle and the tendon. Conclusion Fibrosis of endomysium and scar formation at the injury might be an important cause of frequent recurrence of muscle sprain.

Clinical application of fecal elastase test in patients with pancreatic disease / 中华消化杂志

Objective To evaluate the clinical application of fecal elastase test in exocrine insufficiency of pancreatic disease. Methods The fecal elastase 1 was detected by ELISA method in 55 patients with chronic pancreatitis, 21 with pancreatic cancer and 25 with nonpancreatic digestive disease, and the urine BT PABA was measured by DACA method simultaneously. Results The fecal elastase 1 and urine BT PABA excretion in patients with chronic pancreatitis and pancreatic cancer were much lower than those in patients with nonpancreatic disease ( P

Diagnostic value of Omeprazole test in gastro-esophageal reflux disease / 中华消化杂志

Objective To observe the diagnostic value of Omeprazole (Losec) test in gastro-esophageal reflux disease. Methods According to clinical manifestations and results of esophageal 24 h pH monitoring and gastro-esophageal endoscopy, 152 patients with reflux symptoms (123 GERD, 29 non-GERD) were randomly, double-blindly divided into group A (Omeprazole 20 mg/d for 1 week), group B(Omeprazole 40 mg/d for 2 weeks), and group C (placebo at the first week, Omeprazole 40 mg/d at the 2 nd week). Symptom score from heartburn, acid regurgitation, food regurgitation, and substernal pain, was recorded before and after taking Omeprazole or placebo. Results After taking Omeprazole 1 week, the symptom score decreasing from GERD patients of group A, B and C was 5.0?4.8、4.9?4.6、2.3?4.0 respectively, score decreasing 2 was the best critical value for GERD diagnosis. There was no difference between Omeprazole 20 mg/d and 40 mg/d for 1 week, the results showed that Omeprazole test (20 mg/d for 1 week) has the best diagnostic value for GERD, the diagnostic sensitivity was 82.5%, specificity was 40.1%, coincident rate was 76.7%. Conclusion Omeprazole test is reliable for GERD diagnosis.

Cleavage of Oncogene ki-rasG12V mRNA by Ribozyme and It' s Specificity / 中国肿瘤生物治疗杂志

Objective: To design and confirm the cleavage activity of ribozyme Rz217 to oncogene ki-rasG12V messenger RNA and search for a new method for gene therapy targeting oncogene ki-ras. Methods: According to Symon' s principle,design an ribozyme specific for ki-rasc12v mRNA, both the constructs for transcription in vitro of ribozyme Rz217 and ki-ras exonl and the mammalian expression constructs of ribozyme Rz217 were constructed by DNA recombinant technique,ribozyme Rz217 and ki-ras exonl mRNA was obtained by transcription in vitro with T7 and SP6 RNA polymerase. Pancre atic carcinoma cell line PaTu8988 and human hepatocellular carcinomacell line BEL7404 were transfected with Rz217 mammalian expression constructs and the level of endogenous ki-rasG12V mRNA or ki-ras mRNA was determined by semiquantitative RT-PCR. Results: Not only in vitro but also in vivo, ribozyme Rz217 can cleave the mRNA of oncogene ki-ras (G12V) in site-specific manner and can not cleave the mRNA of wild-type ki-ras. Conclusion: Ribozyme Rz217 can cleave oncogene ki-rasc12v mRNA and the cleveage is specific for ki-rasG12V mRNA.

The Imitative experiment on gastroscopic disinfection── determination of cleaning and disinfectant time / 中华消化内镜杂志

Objective To determine the cleaning and the shortest disinfectant time for gastroscope Methods 1? g/ml HBsAg and 3? 108/ml bacteria of Aureus Staphylococci(ATCC 6538),Escherichia coli(ATTC 8099),Bacterium earuginosum(ATCC 27853)were artificially spreaded on the body of gastroscope ,biopsy hole and biopsy clamp.The gastroscope was routinely cleaned and disinfected.HBsAg and pathogens in the samples,which collected before and after cleaning the gastroscope and 3min,5min,10min after disinfection,were tested by using ELISA and bacteria culture,respectively.Results Pathogen and HBsAg can be detected before cleaning the gastroscope.Pathogen can also be detected,but HBsAg disappears after cleaning.Both HBsAg and pathogen was negative 3 min after gastroscope was immersed in glutaraldehyde.Conclusion The tests for pathogens and HBsAg can be negative after gastroscope was cleaned and immersed in 2％ glutaraldehyde for 3 min.

AN OBSERVATION ON PHARMACODYNAMICS AND TOXICITY OF SHIWEI DANGGUIYIN / 中药新药与临床药理

Shiwei Dangguiyin(SWDGY)is mainly composed of Radix Angelicae Sinensis,Radix Adenophorae,Radix Notogenseng,Radix Bupleuri,etc. Oral administration of SWDGY could significantly inhibit the metatarsal swell- ing eaused by dimethylbenzene in rats,raise the pain threshold in hot-plate test and depress the torsive reaction caused by acetic acid in mice.In vitro SWDGY exerted bacteriostatic and bacteriocidal effects on Staphylococcus aureus,Bacil- lus pyocyaneus,Escherichia coli,Streptococcus A,B and C.It was shown that SWDGY possessed anti-inflammatory,analgesic and antiseptic effects in vitro.In mice LD_(50) of SWDGY by oral administration was more than 840g/kg.Affer cral adminstration in a daily dose of 189.Sg/kg continuously for one month in rats, no toxic reactions appeared,This dosage was 118.6 times as much as the clinical one.

Effects of FKBP12.6 gene on intracellular Ca~(2+) concentration in mouse H9c2 (2-1) myocardial cells transfected by ultrasound-mediated destruction of microbubbles / 中国病理生理杂志

AIM: To investigate the changes of intracellular calcium ion (Ca2+) concentration in mouse H9c2 (2-1) cells transfected with or without FK506 binding protein 12.6(FKBP12.6) gene by ultrasound mediated destruction of microbubbles. METHODS: The pcDNA3.1-FKBP12.6 plasmid, mingled with albumin-coated microbubbles agents, was transfected into H9c2 (2-1) cells by ultrasound-mediated destruction of microbubbles. The H9c2 (2-1) cell growth state was investigated by inverted microscope. The changes of intracellular Ca2+ concentration was determined by laser scanning confocal microscope. The FKBP12.6 protein expression was checked by immunohistochemistry. RESULTS: As compared with control cells, the H9c2 (2-1) cells, transfected with FKBP12.6 gene, grew better, had higher gross intracellular Ca2+ concentration. CONCLUSION: FKBP12.6 gene augments Ca2+ concentration in mouse H9c2 (2-1) cells, enhances the contractibility of the myocardial cell, which may be helpful to improve the myocardial dysfunction.