Heme oxygenase-1 in tumors: is it a false friend?

Heme oxygenase-1 in tumors: is it a false friend?
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肿瘤中的血红素加氧酶-1:它是一个假朋友吗?

DOI:
10.1089/ars.2007.1659
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发表时间:
2007-12
影响因子:
6.6
通讯作者:
Dulak J
Dulak J
中科院分区:
生物学2区
文献类型:
--
作者:
Jozkowicz A;Was H;Dulak J

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血红素加氧酶-1 (HO-1)催化血红素氧化生成生物活性产物:一氧化碳(CO)、胆绿素和亚铁。它参与维持细胞稳态,通过减少氧化损伤、减轻炎症反应、抑制细胞凋亡、调节细胞增殖,在组织中发挥重要的保护作用。HO-1也是一个重要的促血管生成介质。大多数研究都集中在HO-1在心血管疾病中的作用上,其重要的有益活动已得到公认。然而,越来越多的证据表明,HO-1激活可能在致癌过程中发挥作用,并可能潜在地影响肿瘤的生长和转移。HO-1在肿瘤组织中经常上调,其表达在治疗反应中进一步增加。虽然确切的作用可能是组织特异性的,但HO-1可以被视为促进肿瘤进展的酶。因此,抑制HO-1可以作为一种潜在的治疗方法,使肿瘤对放射、化疗或光动力治疗敏感。
Heme oxygenase-1 (HO-1) catalyzes the oxidation of heme to biologically active products: carbon monoxide (CO), biliverdin, and ferrous iron. It participates in maintaining cellular homeostasis and plays an important protective role in the tissues by reducing oxidative injury, attenuating the inflammatory response, inhibiting cell apoptosis, and regulating cell proliferation. HO-1 is also an important proangiogenic mediator. Most studies have focused on the role of HO-1 in cardiovascular diseases, in which its significant, beneficial activity is well recognized. A growing body of evidence indicates, however, that HO-1 activation may play a role in carcinogenesis and can potently influence the growth and metastasis of tumors. HO-1 is very often upregulated in tumor tissues, and its expression is further increased in response to therapies. Although the exact effect can be tissue specific, HO-1 can be regarded as an enzyme facilitating tumor progression. Accordingly, inhibition of HO-1 can be suggested as a potential therapeutic approach sensitizing tumors to radiation, chemotherapy, or photodynamic therapy.
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