目的 研究血清胃蛋白酶原(PG)、胃泌素17(G-17)水平和HP感染与慢性萎缩性胃炎(CAG)和肠上皮化生的相关性。方法 连续选择2016年6月—2017年6月于我院诊断慢性非萎缩性胃炎60例,CAG 40例和肠上皮化生40例,比较患者血清PGI、II和PGI/II,G-17水平以及HP阳性感染率。结果 CAG和肠上皮化生患者PGI和PGI/II低于非萎缩性胃炎患者,而PGII水平升高,G-17水平和HP阳性感染率也增加,差异均有统计学意义(P＜0.05)。结论 血清PG、G-17水平和HP感染是CAG和肠上皮化生的重要机制。

Objective To study correlation in serum pepsinogen(PG),gastrin 17(G-17) levels and helicobacter pylori(HP) infection and chronic atrophic gastritis(CAG), intestinal metaplasia. Methods A total of 60 cases as non-CAG,40 of CAG and other 40 of intestinal metaplasia from June 2016 to June 2017 were consecutives enrolled, then to compare differences of serum PGI,II,PGI/II,G-17 levels, HP infection positive rate. Results The PGI and PGI/II values in patients with CAG and intestinal metaplasia were both lower than non-CAG patients, while PGII level got more,G-17 level and HP infection positive rate were higher too(P＜0.05). Conclusion The expressions of serum PG,G-17 and HP infection may be the important mechanism to CAG and intestinal metaplasia.

目的 探讨血清胃蛋白酶原在胃癌筛查中的价值。方法 用ELISA方法对1102名患者血清PG水平进行检测,并行内镜病理组织学检查,采用ROC曲线确定PG筛查胃癌的最佳界定值。结果 与对照组、萎缩性胃炎组、胃良性溃疡组相比,早期胃癌组、进展期胃癌组PGI、PGR下降(P＜0.05),进展期胃癌组PGI、PGR较早期胃癌组下降(P＜0.05)。与对照组相比,早期胃癌组、进展期胃癌组、胃良性溃疡组PGII升高(P＜0.05)。PGI及PGR在ROC曲线下面积为0.920和0.831,对胃癌的诊断价值较高。PGI≤71.50 μg/L或PGR≤4.50作为筛查标准时,对胃癌高危人群筛查的灵敏度为83.33%,特异度为82.25%。结论 血清PGI、PGR在不同胃部病变中的表达水平不一致,对胃癌的早期筛查和早期诊断具有重要价值。PGI≤71.50 μg/L或PGR≤4.50是东莞地区筛查胃癌较合适的界定值。

Objective To investigate the value of serum pepsinogen PG detection for screening of gastric cancer. Methods PG was detected by ELISA of 1102 people, gastrointestinal endoscopy and biopsy pathology were also carried on. Using ROC curve to establish the PG screening standard, and verified its' value at high risk population of gastric cancer. Results Compared with control group, atrophic gastritis group and benign gastric ulcer group, serum PGI and PGR in early gastric cancer group and advanced gastric cancer group decreased significantly(P＜0.05). Serum PGI and PGR in advanced gastric cancer group were lower than early gastric cancer group(P＜0.05). Serum PGII in early gastric cancer group, advanced gastric cancer group and benign gastric ulcer group were higher than control group(P＜0.05). The area under ROC curve of PGI and PGII was 0.920 and 0.831 respectively, both of them showed high value for the diagnosis of gastric cancer. Took PGI≤71.50μg/L or PGR≤4.50 as the diagnosis criteria, the sensitivity was 83.33% and specificity was 82.25% at high risk population of gastric cancer. Conclusion Serum PGI and PGR were inconsistent in different gastric disease, which showed high sensitivity and specificity in the screening of gastric cancer,and have important value in early screening and early diagnosis of gastric cancer. PGI≤71.50μg/L or PGR≤4.50 were established as the appropriate standard for PG screening.