Human SW480 colonic cancer cell line was evaluated for its growth response to pentagastrin, gastrin receptor antagonist proglumide (PGL) in vitro by MTT assay and flow cytometry. The results showed that gastrin possessed a proliferative effect on SW480 cell, PGL alone had no obvious effect on SW480 cell, but it inhibited gastrin-induced growth of SW480 cell with dosage dependent when it was used with gastrin, its inhibitive effect did not steadly increase at a dose＞32μg/ml. This suggests that effect of gastrin is achieved via gastrin receptor. Gastrin promoted the sythesis of DNA, protein and triggered the cancer cell shifting from phase G0/G1 to phase S, G2M. PLG inhibited the effect of gastrin, it suggests that gastrin possessed a proliferation on SW480 cell at post receptor is achieved by the effect of gastrin on cell cycle.
Gastrin(G) concentration in fasting blood, cancer tissues and its adjacent mucosas sampled from fourty-three patients with large intestine carcinoma (LIC) were measured. The results showed fasting G levels in patients with LIC were significantly higher than those in the normal surum controls (Ｐ＜0.05),and dropped to normal value after resection of the cancers. Surum G levels were correlated with cell differentiations of the cancer.The cancer tissues and its adjacent mucosas contained higher levels of G than the normal mucosas (Ｐ＜0.05). The results provided a laboratory evidence that the growth of LIC in vivo were regulated by G and G level might be an indicative parameter for selection of patients with LIC to be treated with hormone therapy and the study of biological character of LIC.
ObjectiveTo explore the application value of the combined detection of CA19-9, CA72-4, carcinoembryonic antigen (CEA), serum pepsinogen Ⅰ(PGⅠ), serum pepsinogen Ⅱ(PGⅡ), ratio of PGⅠ and PGⅡ (PGR), and gastrin-17 (G17) in the diagnosis of gastric cancer.MethodsOne hundred cases of gastric cancer admitted to the Joint Logistic Support Force 940 Hospital of the People’s Liberation Army from January 2016 to August 2018 were respectively collected as the observation group, 110 cases of benign gastric lesions as the control group during the same period, the levels of serum CA19-9, CA72-4, CEA, PGⅠ, PGⅡ, PGR, and G17 were tested among patients in the two groups, the diagnostic value of single and combined detection (included CA19-9, CA72-4, CEA, PGⅠ, PGⅡ, PGR, and G17) were explored.ResultsThe levels of CA19-9, CA72-4, CEA, and G17 in the observation group were higher than those of the control group (P<0.05), the levels of PGⅠ and PGR were lower than those of the control group (P<0.05). The positive detection rates of CA19-9, CA72-4, CEA, G17, PGⅠ, PGR, and combined detection in the observation group were all higher than those of the control group (P<0.05). The sensitivity and accuracy of the combined detection in the diagnosis of gastric cancer were higher than that of single serum index (P<0.05). The levels of serum CA19-9, CA72-4, CEA, and G17 in the patients of Ⅲ+Ⅳ period, low and moderate degree of differentiation, the tumor diameter was larger than five centimeters, signet-ring cell carcinoma, and distance metastasis of gastric cancer patients were on the high side compared with Ⅰ+Ⅱ period, high differentiation, the tumor diameter was less than or equal to five centimeters, glandular cancer, and no distance metastasis of gastric cancer patients, as well as the levels of serum PGⅠ and PGR on the low side (P<0.05).ConclusionThe combined detection of CA19-9, CA72-4, CEA, PGⅠ, PGⅡ, PGR, and G17 can effectively improve the diagnose rate of gastric cancer, and they are closely related to the pathological characteristics of gastriccancer patients.
Objective To investigate the mechanism and clinical significance of vincristine (VCR) inhibiting gastrinproliferation effects on human colon cell line SW480. Methods Effects of VCR on the viable cell count (A value), myoinositol triphosphate (IP3, CPM value), 〔Ca2+〕i and protein kinase C (PKC) activity of human colon cell line SW480 were evaluated in vitro by MTT assay,3Hmyoinositol incorporation, fluorescence measurements and γ-32P-ATP incorporation.Results A value of VCR+PG group was lower than that of PG or control group (Ｐ＜0.01 vs control, Ｐ＜0.01 vs PG). The concentration of IP3 or 〔Ca2+〕i in VCR+PG group was lower than that in PG group (Ｐ＜0.01 vs PG); and the PKC activity of membrane was lower than that in PG group (Ｐ＜0.05 vs PG, Ｐ＞0.05 vs control). Conclusion Effects of vincristine may be through the phosphoinositide signaling pathway on gastrinstimulating cell proliferation in human colon cell line SW480. It has provided an experimental evidence for antisignaling therapy for patients with colon cancer.
Objective To investigate the diagnosis and treatment of pancreatic gastrinoma. Methods The clinical data of 13 patients with pancreatic gastrinoma who were admitted to Hainan Provincial People’s Hospital from Jan. 1990 to Dec. 2010 were retrospectively analyzed. Etiologic and localization diagnosis were preformed preoperatively according to the manifestation and the results of color Doppler ultrasound and computer tomography，respectively. All patients received chemoradiotherapy after operation according to the pathology results. Results All of the thirteen patients underwent operation. The location of pancreatic gastrinoma was found in the head of the pancreas in 9 cases，in the tail of the pancreas in 1 case，in the body of the pancreas in 2 cases， and 1 case with multiple pancreatic gastrinonma，respectively. The diameters of the pancreatic gastrinoma were 0.2-4.0cm and 11 patiens were above 2.0cm. One patient underwent resection of the body and tail of the pancreas and spleen，seven patients underwent tumor resection，two patients underwent resection of the choledocho-pancreatic junction， and three patients underwent pancreaticoduodenectomy. One patient complicated with pancreatic leakage and two with incision infection. Twelve patients were followed up for 16-120 months （mean 78 months）. Clinical symptoms such as diarrhea disappeared after operation in twelve patients. Results of electronic gastroscopy in 6 months after continuous treatment with proton pump inhibition agents showed that the gastric ulcer were healed，the 12 hour gastric juice volume and the level of the gastric acid were in the normal range. Ten patients were cured，but one patient died because of other disease in 1 year after operation，one patient died because of recurrence in 1.5 years after operation， and one patient died in 4 years after reoperation of liver metastases. Conclusion Surgical treatment is a effective method for pancreatic gastrinoma.
Objective To study the earlier and later clinic results of 64 chronic duodenal ulcer patients treated with high selective vagotomy and mucosal antrectomy (HSV+MA). Methods The clinic results of the patients and the changes of gastrin, motilin and somatostatin in the blood were prospectively investigated. Results Fifty nine (92.2%) patients after 3-6 months of follow-up and 26 (92.9%) patients after 5-8 years of follow-up achieved Visick grates Ⅰ-Ⅱ. No patients died. Gastric acid secretion and infection rate of helicobacter pylori in antral mucosa were significantly reduced after operation. No significant difference was showed in bile acids and total bacterial counts of gastric juice before and after operation. No ulcer recurrence was found by barium meal and endoscopy. There was no significant difference in serum gastrin and plasma motilin before and after operation. The level of somatostatin in the blood of patients after 5-8 years of follow-up was decreased. Conclusion HSV+MA is the better operative treatment for duodenal ulcer, since it can not only effectively and lastingly decrease acid secretion and rates of ulcer recurrence, but also preserve the function of the antrum and pylorus and keep the gastric milieu interne relatively stable.
Objective To study the relationship between gastrin and c-myc, c-fos expression in colorectal cancerous tissue and the mechanism of gastrin effect on colorectal cancer.Methods The gastrin and c-myc, c-fos expression in 48 cases of colorectal cancerous tissue and canceradjacent mucosa were detected with immunohistochemistry techniques.Results The positive rate of gastrin in colorectal cancerous tissue was 39.58%. The rate of the well differentiated adenocarcinoma was higher than that of the poorly differentiated and mucinous adenocarcinoma(P＜0.05). The positive rates of c-myc and c-fos in colorectal cancerous tissue were higher than those in canceradjacent and normal mucosa. The positive rate of c-myc and c-fos in the group with gastrin positive expression were 78.94% and 73.68%, higher than those in the group with negative gastrin expression(37.93% and 31.04%). Conclusion Some of colorectal cancer cells formed and secreted gastrin through autocrine. The increase of cmyc, c-fos etc oncogene expression probably stimulate the cancer cells proliferation.
Objective To study the neuropathological changes of gastrin and substance P(SP) in the intermuscular and submucous nerve plexus of the colonic walls in patients with delayed motor constipation(DMC).MethodsGastrin and rabbit SP polyclonal antibiotics were used to make an immunohistochemical staining of the samples of different segments obtained from 10 patients with DMC and 8 normal subjects(control group) for a comparative observation as well as a relative semi-quantitative analysis.Results The immune positive nerve cells of gastrin and SP in the intermuscular nerve plexus of colon with DMC were markedly reduced; no differences in the immune response of gastrin and SP in the mucous nerve plexus were found between the two groups(P＜0.01). With routine HE staining, focal inflammation occurred in the mucous membrane of DMC colon and that the neuronal vacuolus of the intermuscular nerve plexus degenerated, reduced and even disappeared. Conclusion The abnormal changes of the neural structure in the immune reponse of gastrin and SP in the intermuscular nerve plexus of colon with DMC might be related to reduction of gastrin and SP peptide neuron or dysfunctional.
目的 探讨地震应激对胃泌素、生长抑素、血清超氧化物歧化酶（SOD）活性和丙二醛（MDA）水平的影响，为震后灾区人群应激性溃疡的防治提供理论依据。 方法 随机抽取四川省人民医院2008年5月15日－31日间收治的60名5.12汶川地震灾民为研究组，58名健康体检者作为对照组。分别对两组人群进行心理调查，采用酶联免疫吸附法测定血清胃泌素和生长抑素水平，利用生化法检测血清SOD活性和MDA含量，并对上述各指标在两组间的分布进行比较。 结果 研究组症状自评量表得分高于对照组（P＜0.05）；两组血清胃泌素分别为（1.04 ± 0.67）、（0.74 ± 0.58） ng/mL，研究组高于对照组（P＜0.01）；两组MDA水平分别为（7.16 ± 5.58）、（4.83 ± 4.48） nmol/mL，研究组高于对照组（P＜0.05）；而两组生长抑素分别为（0.74 ± 0.94）、（1.92 ± 3.05） ng/mL，研究组低于对照组（P＜0.01）；两组SOD分别为（6.06 ± 2.20）、（7.79 ± 1.58）U/mL，研究组低于对照组（P＜0.01）。 结论 地震可引起生理应激状态，导致机体在免疫、抗氧化能力、胃肠激素等方面出现一系列变化，胃泌素、生长抑素等均参与应激性疾病的形成，这些变化可能导致地震灾区消化性溃疡高发。
Objective To study the effect of gastrin receptor antagonist on large intestine cancer patients with liver metastatic. Methods Thirty eight patients received chemotherapy in control group, in therapy group 46 patients received chemotherapy and gastrin receptor antagonist pruglumide 1 200 mg/day. Follow-up was done each month in two groups. Results In control group, liver metastatic cancer increased 8.1±2.2 cm， 1-year mortality was 55.3% (21/38), and in therapy group, liver metastatic cancer increased 3.5±1.2 cm, the mortality was 21.7% (10/46), which was significantly lower than that in control group (Ｐ＜0.01).Conclusion Gastrin receptor antagonist can delay cancer proliferation, prolong survival time and decrease death rate of colon cancer patients with liver metastasis.