Decreased uncoupling protein 2 expression in aging retinal pigment epithelial cells

• 作者: Xia Wang Xu Liu Yuan He Yuan Ren Zhi Ji
• 来源期刊: 国际眼科杂志:英文版
• 学科: 医学
• 关键词: retinal PIGMENT EPITHELIUM cells AGING UNCOUPLING protein 2 oxditive stress ANTI-OXIDATION
• 年，卷（期）: gjykzzywb_2019,（3）
• 页码范围: 375-380
• 页数: 6页
• 分类号: R774.1

摘要

AIM: To analyze the expression of uncoupling protein 2(UCP2) in retinal pigment epithelium(RPE) cells at the different human age, further explore the possible new target of RPE cells protection.METHODS: Adult retinal pigment epithelial-19(ARPE-19) cells and the primary RPE cells at the different age(9-20 y,50-55 y, 60-70 y, >70 y) were cultured and harvested. The expression of UCP2 in these cells was detected by reverse transcription-polymerase chain reaction(RT-PCR), Western blot and confocal microscopy.RESULTS: Cells from the donors more than 60 y are larger and more fibroblastic in appearance compared to ARPE-19 cells and those primary cultures obtained from the younger individuals by using phase-contrast micrographs. Results of RT-PCR, Western blot and confocal microscopy all showed that UCP2 was highly expressed in ARPE-19 cells and in the younger primary cultured human RPE cells at the age of 9-20 y and 50-55 y, whereas lower expression of UCP2 was measured in the older primary cultured human RPE cells at the age more than 60 y.CONCLUSION: Expression of UCP2 gene is decreased in aged RPE cells, promoting the lower ability of anti-oxidation in these cells. It is indicated that UCP2 gene might be a new target for protecting the cells from oxidative stress damage.