文档介绍：胃蛋白酶原检测
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the -95%
胃癌的发生
胃癌的发生并非是由正常胃粘膜上皮细胞骤然变为癌细胞，而是一个渐进的过程。冰冻三尺非一日之寒，胃癌的发生也不是一朝一夕的事情。在发展为胃癌之前，常经历一个相当长的癌前变化过程。如慢性萎缩性胃炎、胃溃疡、胃息肉、手术后残胃、恶性贫血及巨大胃粘膜肥厚症等，就属于胃癌的“癌前疾病”，他们将使发生胃癌的危险性明显增加。其中最常见的当数慢性萎缩性
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
临床实验研究表明，通过胃蛋白酶原Ⅰ/Ⅱ(PGⅠ/PGⅡ)检测进行临床筛查诊断，对早期胃癌的发现和确诊有重要意义。用过PGⅠ/PGⅡ进行筛查，筛查出的“阳性”结果，再进一步进行胃镜检查，就会变得更有针对性。
胃蛋白酶原—胃部疾病的标志物
胃蛋白酶原(PG)是由胃粘膜分泌的蛋白酶前体可分为PGⅠ和PGⅡ两种亚型。PGⅠ来源于胃底腺的主细胞和颈黏液细胞，PGⅡ来源于全胃腺，十二指肠、前列腺和胰腺也产生少量PGⅡ。合成后的PG大部分进入胃腔，在胃酸的作用下活化成胃蛋白酶，通常约1%的PG可通过胃粘膜进入血液循环，血清PG的浓度反映其分泌水平，因此，血清胃蛋白酶原可以较为准确地显示胃粘膜的症状和功能。
胃蛋白酶原检测的意义
·胃癌早期筛查
·胃溃疡、萎缩性胃炎、HP感染的筛查
·幽门螺杆菌(HP)治疗效果的评价
·消化性溃疡复发、治