ObjectiveTo investigate the role of somatostatin in gastrointestinal function after operation for treatment of abdominal injury patients. MethodsSixty patients with abdominal trauma were divided into somatostatin in treatment group (n=30) and the conventional treatment control group (n=30). The amount of gastrointestinal decompression drainage, bowel sounds recovery time, exhaust time, defecation time, and the levels of serum C reactive protein, TNF-α, IL-6, and IL-8 after operation in two groups were observed. ResultsSomatostatin treatment group recovery time of bowel sounds, exhaust time, and defecation time were earlier than the control group, hospitalization time shortened, and the amount of gastrointestinal decompression drainage reduced (P < 0.05), The levels of serum C reactive protein, TNF-α, IL-6 and IL-8 of somatostatin treatment group were lower than those in control group (P < 0.05), and the magnitude of decline above index in the somatostatin treatment group were greater than that in the control group (P < 0.05). ConclusionSomatostatin can promote the recovery of gastrointestinal function in patients after operation in abdominal injury.
Human SW480 colonic cancer cell line was evaluated for its growth response to Octa peptide somatostatin (SMS 201·995, SMS) in vitro by MTT assay and flow cytometry. The results showed that SMS possessed an inhibitive effect on SW480 cell at dose 1.563－200ng/ml, the maximal effective dose was 50ng/ml. Inhibitive effect of SMS did not steadily increase at a dose ＞50ng/ml. It suggests that effect of SMS is achieved via somatotatin receptor. SMS obviously inhibited the synthesis of DNA and protein, and prohibited the SW480 cell shifting from phase G0/G1 in phase S, G2M, which suggests that somatostatin (SS) possessed an inhibitive effect on large intestinal at cancer cell, it is achieved at receptor by inhibiting the synthesis of DNA and protein and prohibiting cell cycle of cancer.
Objective To evaluate the effectiveness and safety of somatostatin and the analogue-octreotide in preventing post-ERCP pancreatitis. Methods We searched Cochrane Clinical Trial Register （Issue 1, April, 2004 ）, MEDLINE （1966- April, 2004）, EMBASE （1985- April, 2004）, CBM disc （1970- April, 2004） and The Clinical Trial Register of Chinese Evidence-Based Medicine Center and handsearched the related journals to identify Randomized Controlled Trials （RCT）of somatostatin and octreotide in post-endoscopic retrograde chnlangiopancreatography pancreatitis（PEP）prevention. Systematic review was conducted using the method recommended by The Cochrane Collaboration. Results Thirty-one trials involving 4 728 patients undergoing ERCP were included. Meta-analysis showed that the incidence of post-ERCP pancreatitis [ OR 0.33, 95% CI 0. 20 to 0. 54; P =0. 000 01 ; NNT =13] was significantly reduced by somatostatin. Octreotide could only reduce the incidence of hyperamylasemia [ OR 0. 54, 95% CI 0. 38 to 0. 77 ; P =0. 000 7 ]. The inci- dence of PEP, severe PEP and post-ERCP abdominal pain could not be reduced by octreotide. Conclusions Somatostatin can prevent post-ERCP pancreatitis. Four trials are of high quality in the 12 included studies and the results are consistent with the sensitive-analysis, so it is credible to some extent. However, existing evidence does not support that octreotide can reduce the incidence of PEP, so it is not recommended for this indication. Sensitive-analysis even showed that octreotide could increase the incidence of PEP. Therefore, whether it is necessary to carry out further clinical trials should be considered with caution.
Objective To study the relationships between expressions of somatostatin receptor subtypes（SSTR1-SSTR5） and angiogenesis in colorectal cancer. Methods The expressions of SSTR1-SSTR5, VEGF, and CD34 in the paraffin sections of colorectal cancer tissues from 127 cases were detected by the standard streptavidin-peroxidase (SP) technique. CD34 was used as a marker to account microvessel density (MVD) in colorectal cancer tissues. The relationships between the expressions of SSTR1-SSTR5 and VEGF expression, or MVD were analyzed. Results The positive expression rate of SSTR1, SSTR2, SSTR3, SSTR4, and SSTR5 was 64.6% （82/127）, 36.2% （46/127）, 18.9% （24/127）, 18.9% （24/127）, and 38.6% （49/127） in colorectal cancer tissues, meanwhile, the positive expression rate of VEGF was 63.8% （81/127） and MVD was (34.67±16.62)/HP in colorectal cancer tissues. The positive expression rate of VEGF (47.8%， 22/46) and MVD 〔(29.00±15.32)/HP〕 in colorectal cancer tissues with SSTR2 positive expression were significantly lower than those in colorectal cancer tissues with SSTR2 negative expression 〔72.8%， 59/81； (37.90±16.56)/HP〕, Plt;0.05. There were no relationships between SSTR1, SSTR3, SSTR4, and SSTR5 expression and VEGF expression or MVD （Pgt;0.05）. Conclusion The positive expression of SSTR2 is related with angiogenesis in colorectal cancer tissues.
ObjectiveTo detect the effect of adeno-associated-virus induced Kringles5 gene on retinal neovascularization in rats with retinopathy of prematurity (ROP), and to explore the new ways of treatment for ROP.MethodspSNAV-Kringle5-gfp carrier was constructed by subclone and adeno-associated-virus was packed to form rAAV-Kringle5-gfp. ROP model was set up under circumstances of high oxygen in 21 SD rats which were divided into experimental (21 eyes) and control group (21 eyes). Eighteen eyes from each group was used to making the histologic section of retina, and the other 3 eyes in each group was detected by polymerase chain reaction (PCR) and Western blotting. There were 5 rats in the normal control group. AAV-Kringle5-gfp with the dosage of 10 μl and titer of 2.5×1012vg/ml was injected into the eyes in experimental group, while rAAVlacZ with the same dosage and titer of 2.5×1011vg/ml was injected in to the eyes in control group. The expression of target gene in ocular tissues was observed under the fluoroscope. Twelve weeks later, the rats were executed, and the staining of Ⅷ factor related antigens in retinal vascular endothelial cells was performed and number of nucleolus of vascular endothelial cells were counted. ResultsThe plasmid of pSNAV-Kringle5-gfp was correct according to the sequence measurement; the expression of rAAV-Kringle5-gfp was found in vitreous cavity and on retina; the expression of target gene was found on the level of mRNA and protein; the number of nucleolus of vascular endothelial cells on the surface of retina was (19.954 2±3.825 7) in experimental group and (7.335 2±2.731 3) in the control group, which had significant difference between the two groups (P＜0.01）.ConclusionsAdeno-associated-virus induced Kringles5 gene can inhibit the occurrence of retinal neovascularization in patients with ROP.(Chin J Ocul Fundus Dis, 2005,21:288-291)
Objective To investigate the effect of angiostatin gene combined with somastatin on inhibiting proliferation of human pancreatic cancer cell BXPC-3 and endothelial cell of vascular ECV-304 and on inducing their apoptosis in vitro. Methods The pcDNA3/angio was transfected BXPC-3 by liposome-mediated gene transfer method. RT-PCR and Western blot were used to detect the expression of angiostatin gene. In vitro, MTT and flow cytometry (FCM) were used to detect whether angiostatin gene combined with somastatin could effect the growth inhibition of BXPC-3 and ECV-304 cells. Results Angiostatin was expressed and secreted by transfected BXPC-3. The growth of BXPC-3 was inhibited by certain concentration of somatostatin (≥10 μg/ml, P＜0.01）, which was dependent on the dose of somatostatin in a concentration extent; Simultaneity apoptosis was induced （P＜0.01）. But the growth of ECV-304 was not inhibited with somatostation （Pgt;0.05）. Angiostatin could inhibit the growth of ECV-304 and induced apoptosis （P＜0.01）, but it had no effect on the growth of BXPC-3 （Pgt;0.05）. Angiostation gene combined with somatostation could inhibit the growth both of BXPC-3 and ECV-304 （P＜0.01）, and induce apoptosis of them （P＜0.01）; but the effect couldn’t be additived. Conclusions ①Somatostatin directly inhibits the proliferation of human pancreatic cancer cells and induces apoptosis, but it doesn’t directly inhibit angiogenesiso of human pancreatic cancer. ②Angiostatin specially inhibits the proliferation of endothelial cell of vascular and induces apoptosis. Angiostatin could inhibit angiogenesis of human pancreatic cancer to induce necrosis of cancer cell.
目的:探讨重组人IGF-1和生长抑素-14单独及联合应用对甲状腺相关眼病患者眼眶成纤维细胞增殖的影响。方法:体外培养甲状腺相关眼病患者眼眶成纤维细胞,采用四甲基偶氮唑盐(MTT)比色法检测不同浓度及作用时间的重组人IGF-1和生长抑素-14对细胞增殖的作用。结果:50μg/L以上浓度IGF-1对眼眶成纤维细胞有促增殖作用,5nmol/L以上浓度的SST对眼眶成纤维细胞的生长有抑制作用,均呈量效和时效关系。IGF-1和SST联合应用时, 50nmol/L以上的SST能阻断100μg/L的IGF-1促细胞增殖的作用。结论:IGF-1可刺激眼眶成纤维细胞增殖。SST能抑制眼眶成纤维细胞增殖,并能阻断IGF-1促进细胞增殖的作用,此抑制作用与浓度有关,提示SST能直接通过受体后机制抑制IGF-1诱导的眼眶成纤维细胞增殖。
To investigate the origin and releasing relation of motilin (MTL), vasoactive intestinal peptide (VIP) and somatostatin (SS) in guinea pig bile as well as its effects during gallstone formation. Guinea pig were divided into three groups: control group (50 animals), on normal diet; lithogenic group (70 animals), fed with lowprotein low fat; and recovering group (50 animals), fed with lowprotein low fat and recovering normal food after the experiment of gallstone formation. MTL, VIP and SS in the bile gallbladder tissue and portal vein plasma of the normal control group were measured with radioimmunoassay. Meanwhile the changes of the gut peptides in the bile and the bile components from different groups were also compared. Results: In control group the levels of MTL, VIP and SS in the bile were higher than those in the plasma, but, obviously lower than those in the tissues, the concentration relationship between in the bile and in the tissue was a positive correlation. In contrast to the control group, MTL concentration decreased but VIP and SS increased in the bile of the lithogenic group, the physicochemical nature of the bile also became lithogenic. In the recovering group the bile also became lithogenic, but, the concentration of those peptides and the nature of the bile all got normal. Conclusion: MTL, VIP and SS in guinea pig bile originate mainly form the gallbladder wall tissues. Food components affect the levels of the gut peptides in bile, which promote the bile lithogenic changes and gallstone formation.
目的探讨生长抑素和肠外营养对重症急性胰腺炎的治疗作用。方法采用生长抑素和肠外营养支持对15例重症急性胰腺炎患者进行治疗（实验组），并与同期22例未采用上述治疗措施者（对照组）进行比较分析。生长抑素用思他宁，并按6 mg/d持续静脉滴注； 肠外营养支持视临床情况按常规给予。结果实验组并发症发生率、手术率和死亡率均显著低于对照组（P＜0.01）。结论生长抑素和肠外营养支持对重症急性胰腺炎具有较佳的治疗效果。