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局部应用的T4内核酶V在脂质体中的皮肤癌对 xeroderma pigmentosum 的影响:一项随机化研究. 克塞罗德玛颜料研究小组研究小组
D Yarosh1, J Klein, A O'Connor
1Applied Genetics Incorporated Dermatics, Freeport, NY 11520, USA. danyarosh@agiderm.com
Lancet (London, England)
|April 6, 2001
概括
局部T4N5脂质体乳液显著降低了新皮肤病变在色素病患者. 这种DNA修复酶疗法为预防这种高风险人群的皮肤癌提供了一种有希望的方法.
科学领域:
- 皮肤病学 皮肤病学
- 遗传学 是一个遗传学.
- 生物化学 生物化学
背景情况:
- Xeroderma pigmentosum患者由于缺陷的DNA修复,皮肤癌的风险更高.
- 阳光引起的DNA损伤在这些人中加速皮肤癌的发展.
- 作为DNA修复酶的T4内核酶V显示出修复细胞损伤的潜力.
研究的目的:
- 评估T4N5脂质体乳液在减少新发皮肤癌患者的Xeroderma pigmentosum患者的疗效.
- 评估局部DNA修复酶的安全性和有效性.
主要方法:
- 这是一项前性,多中心,双盲研究,涉及30名Xeroderma pigmentosum患者.
- 随机分配每天局部应用T4N5脂质体乳液或安慰剂一年.
- 定期监测新的行为性角质和基底细胞癌.
主要成果:
- 与安慰剂 (25.9) 相比,使用T4N5脂质体乳液 (8.2) 的新动因性角质瘤的年化率明显较低 (25.9).
- 在治疗组 (3.8对5.4) 观察到基底细胞癌率下降的趋势.
- 没有报告T4N5脂质体乳液的显著不良影响.
结论:
- 局部DNA修复酶可以有效降低癌前皮肤病变和某些皮肤癌的发生率.
- DNA 损伤在 xeroderma pigmentosum 皮肤癌的发病过程中起着至关重要的作用.
- T4N5脂质体乳液显示出作为预防性治疗阳光损伤皮肤的潜力.
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Nucleotide Excision Repair
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Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
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The color of the skin is influenced by a number of pigments, including melanin, carotene, and hemoglobin. Recall that melanin is produced by cells called melanocytes, which are found scattered throughout the stratum basale of the epidermis. The melanin is transferred to the keratinocytes via melanosomes.
Melanin occurs in two primary forms: eumelanin that provides black and brown pigment and pheomelanin that provides red color. Dark-skinned individuals produce more melanin than those with pale...
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