RSR13, a synthetic allosteric modifier of hemoglobin, as an adjunct to radiotherapy: preliminary studies with EMT6 cells and tumors and normal tissues in mice.

RSR13, a synthetic allosteric modifier of hemoglobin, as an adjunct to radiotherapy: preliminary studies with EMT6 cells and tumors and normal tissues in mice.
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RSR13,一种合成的血红蛋白变构调节剂,作为放射治疗的辅助剂:对 EMT6 细胞以及小鼠肿瘤和正常组织的初步研究。

DOI:
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发表时间:
1998
期刊:
Radiation oncology investigations (Print)
影响因子:
--
通讯作者:
M. Kelley
M. Kelley
中科院分区:
--
文献类型:
--
作者:
S. Rockwell;M. Kelley

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RSR13, 2[4-[[(3,5二甲基苯胺基)羰基]甲基]苯氧基]-2-甲基丙酸是一种合成的血红蛋白变构调节剂,可降低血红蛋白与氧的亲和力。这里报道的实验检查了 RSR13 治疗结合氧气呼吸对 BALB/c 小鼠 EMT6 乳腺肿瘤和两种正常组织放射反应的影响。 RSR13加氧气呼吸增强了EMT6肿瘤对辐射的反应。 RSR13对因氮窒息而导致最大缺氧的肿瘤没有明显的影响,对EMT6肿瘤没有明显的细胞毒性作用,并且在有氧或缺氧条件下对体外EMT6细胞的活力或辐射反应没有影响。因此,RSR13 的作用反映了肿瘤氧合的变化,而不是药物的直接细胞毒性或放射增敏作用。 RSR13 加氧气将呼吸空气和呼吸氧气小鼠的缺氧率从 24% 降低至 9%。 RSR13 加氧气治疗不会改变骨髓祖细胞 (CFU-S) 的放射反应或皮肤的急性放射反应。 RSR13加氧气治疗所产生的肿瘤放射反应的改善,加上正常组织中没有增强的放射反应,支持进一步测试RSR13作为放射治疗的辅助手段。
RSR13, 2[4-[[(3,5dimethylanilino)carbonyl]methyl]phenoxy]-2-methylpropion ic acid, a synthetic allosteric modifier of hemoglobin, reduces the affinity of hemoglobin for oxygen. The experiments reported here examined the effect of treatment with RSR13, combined with oxygen breathing, on the radiation response of EMT6 mammary tumors in BALB/c mice and of two normal tissues. RSR13 plus oxygen breathing increased the response of EMT6 tumors to irradiation. RSR13 had no discernible effects on tumors rendered maximally hypoxic by nitrogen asphyxiation, no discernible cytotoxic effects in EMT6 tumors, and no effect on the viability or radiation response of EMT6 cells in vitro under either aerobic or hypoxic conditions. The effects of RSR13 therefore reflect changes in tumor oxygenation, rather than a direct cytotoxic or radiosensitizing effect of the drug. RSR13 plus oxygen reduced the hypoxic fraction to 9% from the value of 24% found in both air-breathing and oxygen-breathing mice. Treatment with RSR13 plus oxygen did not alter the radiation response of the bone marrow progenitor cells (CFU-S) or acute radiation reactions in the skin. The improvement in tumor radiation response produced by treatment with RSR13 plus oxygen, combined with the absence of enhanced radiation reactions in the normal tissues, support further testing of RSR13 as an adjunct to radiotherapy.
DOI: --
发表时间: 1997
期刊: Oncology research
影响因子: 3.1
作者:
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发表时间: 1992
期刊: International journal of radiation oncology, biology, physics
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DOI: 10.1080/09553009214551711
发表时间: 1992
影响因子: 2.6
作者:
Rockwell,S;Kelley,M;Irvin,CG
通讯作者: Irvin,CG