Abstract
目的 无血清培养条件下,研究不同年龄人表皮细胞(human epidermal cells,hECs)的体外扩增规律,比较不同年龄hECs原代细胞表型.方法临床收集50例包皮环切术中丢弃的皮肤组织,包括中年组(A,35～52岁,11例)、青年组(Y,18～27岁,17例)、儿童组(C,2～12岁,22例).以Dispase和胰酶(tripsin)-EDTA分离,收集hECs并进行体外培养.每个年龄组随机选取5例,各代细胞计数,计算最大扩增倍数,并统计分析.收集原代细胞测量平均直径,记录克隆形成率,流式细胞仪(FACS)检测细胞K19阳性百分率.结果中年、青年、儿童组包皮来源的表皮细胞最大扩增倍数分别为(719±65)、(730±47)、(729±56)倍,各组间无统计学差异(P＞0.05).全体随机标本平均可扩增(728±53)倍,达到最大扩增量所需平均时间为(31±6)d.中年、青年、儿童组,表皮细胞平均直径分别为(3.44±0.42)μm,(3.54±0.46)μm,(3.55±0.37)μm,各组间无统计学差异(P＞0.05);克隆形成率分别为(36.5±5.3)%,(36.9±6.8)%,(36.4±5.1)%,各组间无统计学差异(P＞0.05);FACS检测中K19阳性细胞百分率分别为,(42.55±4.61)%,(42.47±6.58)%,(41.77±4.73)%,各组间无统计学差异(P＞0.05).结论无血清培养hECs的体外扩增规律与年龄因素无关,不同年龄hECs最大扩增能力取决于原代细胞表型。
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