油菜花粉酶解肽抗辐射损伤的研究

目的研究油菜花粉酶解肽(CPRP)的抗辐射损伤作用,为开发安全低毒的抗辐射药物和提高花粉的其它效应提供理论依据。方法将昆明种小鼠随机分为正常对照组、辐射对照组、维生素C(VC)对照组、CPRP低、中、高剂量组。正常对照组与辐射对照组以生理盐水灌胃,VC组以100mg/kgbwVC水溶液灌胃,低、中、高剂量CPRP组分别以50、100、150mg/kgbw的CPRP溶液灌胃,1次/d,连续灌胃35d。在14d时进行4Gy60Co-γ射线一次性辐射。灌胃结束后杀死动物,检测小鼠外周血白细胞数、肝脏组织中超氧化物歧化酶(SOD)活性、骨髓细胞DNA含量和脏器指数。结果CPRP能在规定实验条件下阻止由辐射引起的小鼠外周血白细胞数下降,SOD活性增强,并使小鼠骨髓细胞DNA含量和胸腺脾脏指数升高。在三个剂量组中以高剂量组效果最好。结论CPRP具有良好的抗辐射作用。     

可乐对小鼠精子质量影响

目的 探讨可乐对雄性小鼠精子质量及数量的影响.方法 31只昆明种雄性小鼠按体重随机分为阴性对照组、低剂量组、高剂量组(分别以0.6ml生理盐水、0.3,0.6ml可乐灌胃),腹腔注射组(0.6ml可乐注射)和阳性对照组(0.6ml环磷酰胺腹腔注射)5组.灌胃及腹腔注射1次/d,连续7d,测定小鼠精子的运动参数,并观察其畸形发生率.结果 高剂量组肾脏系数与阴性对照、低剂量组比较差异均有统计学意义(P<0.05);腹腔注射组与阴性对照组比较小鼠附睾系数明显升高(P<0.05).腹腔注射组的精子平均移动角度与阴性对照组比较明显升高(P<0.05),低剂量组精子密度与阳性对照组比较差异有统计学意义(P<0.05).高剂量组、阳性对照组与阴性对照组比较精子畸形率明显升高(P<0.05);低、高剂量组及腹腔注射组与阳性对照组比较差异均有统计学意义(P<0.05);低、高剂量组与腹腔注射组比较差异均有统计学意义(P<0.05).结论 可乐对小鼠精子活性和形态有一定的影响.     

葛根黄酮对辛基酚染毒雄性大鼠睾丸和精子状态的影响

目的研究葛根黄酮对辛基酚染毒雄性大鼠生殖系统的影响。方法将60只健康清洁级雄性SD大鼠按体重随机分为对照组(灌胃同体积的玉米油)、辛基酚低剂量染毒组(80mg/kg)、辛基酚中剂量染毒组(160mg/kg)、辛基酚高剂量染毒组(320mg/kg),低剂量干预组(0.5g/kg葛根黄酮+320mg/kg辛基酚),高剂量干预组(5g/kg葛根黄酮+320mg/kg辛基酚),每组10只。采用灌胃方式进行染毒,每周3次,先给大鼠灌入辛基酚溶液,2h后,再给干预组大鼠灌入等体积的葛根黄酮溶液,灌胃体积为5ml/kg,连续60d。染毒后,取出睾丸,进行形态学观察,并统计精子数、活动度和畸形率。结果与对照组比较,高、中、低剂量染毒组和高、低剂量干预组的精子数和活动度均较低,畸形率均较高,差异均有统计学意义(P<0.05)。与低剂量染毒组比较,高剂量染毒组的精子数和活动度均较低,差异有统计学意义(P<0.05);且随着辛基酚染毒剂量的升高,精子数和活动度呈下降趋势,畸形率呈上升趋势。与高剂量染毒组比较,高、低剂量干预组的精子活动度均较高,畸形率均较低,高剂量干预组的精子数较高,差异均有统计学意义(P<0.05)。结论葛根黄酮...     

低剂量γ射线照射诱导小鼠骨髓细胞染色体畸变的适应性反应

目的探讨低剂量照射后不同攻击剂量对小鼠骨髓细胞染色体畸变的适应性反应.方法小鼠预先用137 Cs γ射线0.05 Gy(D1,预照射剂量)低剂量全身照射(低剂量照射组)、剂量率0.054 Gy/min,3 h后再接受0.7 Gy或1.0 Gy(D2,攻击剂量)全身照射、剂量率0.87 Gy/min,同时设单纯较大剂量组为对照组,观察骨髓细胞染色体畸变率.结果 0.05 Gy低剂量全身照射后3 h再接受0.7 Gy或1.0 Gy全身照射组,小鼠骨髓细胞染色体畸变率和单体断裂(ctb)均明显低于其相应对照组,而与对照组相比,低剂量照射组断片(ace)减少不明确.结论预先的低剂量辐射能够诱导小鼠骨髓细胞染色体畸变的适应性反应,从而使随后较大剂量辐射所致的染色体损伤减轻.     

凹顶藻萜类化合物协同维生素E辐射防护作用研究

目的观察凹顶藻萜类化合物(Laurencia extract,LET)协同维生素E(VE)对亚急性辐射损伤小鼠的防护作用。方法 60只雄性昆明小鼠随机分为正常对照(花生油0.5 ml/kg·d),辐射模型(花生油0.5ml/kg·d),LET低剂量(LET 50 mg+VE 100 mg/kg·d)、LET高剂量(LET 100 mg/kg+VE 100 mg/kg·d)、VE(VE 100 mg/kg·d)、LET(LET 100 mg/kg·d)灌胃,6组,每组10只,对应灌胃,除正常对照组外,其余5组均给予直线加速X射线全身照射,11 d,每次25 CGY,每周5 d,连续4 w。末次灌胃12h后,眼眶取血,行白细胞计数,通过酶联免疫吸附(ELISA)实验测定血清中白介素-2(IL-2)和肿瘤坏死因子-α(TNF-α)水平;处死动物,剥离小鼠股骨行骨髓细胞微核率检测;摘取附睾和睾丸,进行精子畸形率和睾丸精母细胞染色体畸变率检测;摘取胸腺和脾脏,计算脏器指数;采用酶学实验检测肝、肺组织中超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)活力及丙二醛(MDA)含量。结果与正常对照组比较,辐射模型组小鼠白细胞数量明显下降,骨髓细胞微核率、精子畸形率、睾丸染色体畸形率明显升高,脾脏、胸腺指数及血清IL-2水平明显降低,肝、肺组织中SOD活力均明显下降,MDA含量均显著升高,肺组织GSH-Px活力较正常对照组显著下降,差异均具有统计学意义(P0.05)。一定剂量LET与VE协同作用,可使辐射小鼠白细胞数量显著升高,骨髓细胞微核率、精子畸形率和染色体畸变率显著降低,脾脏及胸腺指数、血清IL-2水平显著提高,肝、肺组织中SOD活力、肺组织GSH-Px活力明显升高,肝、肺组织中MDA含量明显降低,与辐射模型组比较,差异具有统计学意义(P0.05)。与LET和VE单独用药比较,一定剂量LET与VE协同作用,在提高白细胞数量、血清IL-2水平、免疫脏器指数、肝组织SOD活力、肺组织GSH-Px活力,降低微核率、精子畸形率、染色体畸变率等方面的作用明显增强,经统计学处理,具有显著性差异(P0.05)。经一定剂量LET与VE协同作用,辐射小鼠的白细胞数量、胸腺指数、血清IL-2水平、肺组织抗氧化酶活力、肝肺组织MDA含量等检测指标已恢复至接近正常水平,与正常对照组比较,无显著性差异(P0.05)。结论对遭受亚急性辐射的机体,一定剂量LET与VE联合补充,可在加快恢复骨髓造血系统功能、减轻生殖系统损伤、调节免疫和改善氧化应激状况等方面发挥良好的辐射防护作用,且较单独用药疗效更佳。     

亚慢性镉中毒所致小鼠睾丸、精子损伤及锌保护作用研究

目的 了解亚慢性镉中毒对睾丸及精子的损伤及锌保护作用。方法 以ICR小鼠为研究对象,以不同剂量的氯化镉(0．4,0．8,3．2mg／kg)每周连续4次背部皮下注射染毒,连续7周;皮下注射1．6mg／kg氯化镉溶液的同时给予350μg／ml硫酸锌水溶液喂饲7周为锌保护组。建立亚慢性镉中毒模型,并观察锌对镉所致睾丸组织病理改变以及对附睾精子畸变的影响。实验同时设立阴性对照组(蒸馏水,ip)和精子畸变阳性对照组(处死前6d给予环磷酰胺50mg／kg,ip,连续2d)。结果 随着染毒剂量的增加,低、中、高各剂量组睾丸组织异常病理变化及精子畸形率呈逐渐增高趋势,表现出明显的剂量—反应关系。锌保护组与高、中染毒组比,精子畸变率明显降低,而与低剂量组和阴性对照组比较精子畸形率差异无显著性;同时镜下病理表现仅见生精细胞上皮层次略有减少,成熟精子数无减少现象,损伤程度明显低于相应染毒组。结论 镉对小鼠的睾丸和附睾有明显的毒性作用,锌对镉的生殖毒性有一定保护作用。     

葡萄籽提取物对辐射所致小鼠氧化损伤的影响

为探讨葡萄籽提取物对小鼠的抗辐射保护作用,将50只昆明雄性小鼠随机分为辐射模型组、溶剂对照组、低(0.083 g/kg)、中（0.167 g/kg）、高（0.500 g/kg）剂量葡萄籽提取物组,用葡萄籽提取物灌胃25,25 d后除溶剂对照组外以7Gy60CoΥ射线对小鼠进行一次性全身照射,继续给予葡萄籽提取物灌胃7d...     

β-胡萝卜素的抗辐射作用

目的 研究β-胡萝卜素的抗辐射作用。方法 采用30、60、90mg／kg β-胡萝卜素的剂量对昆明种小鼠进行30d灌胃,然后用4和8 Gy的^60Co-射线照射小鼠,照射后仍给以原剂量灌胃,并进行动物平均生存时间、存活率、白细胞计数、骨髓细胞微核、睾丸染色体畸变、免疫功能、组织中超氧化物歧化酶(SOD)活力等的检测。结果 各剂量组β-胡萝卜素均能在一定程度上阻止由辐射引起的白细胞下降,提高被辐射小鼠的免疫功能,升高组织中SOD活力,并有抑制微核产生的作用,同时在一定程度上减少由^60Co-1射线而引起的小鼠睾丸染色体畸变,而且可延长动物的生存时间,提高动物的30d存活率。结论 β-胡萝卜素具有抗辐射作用。     

鲨鱼软骨粘多糖对雄性小鼠免疫及生殖器官的辐射防护作用

目的 观察鲨鱼软骨粘多糖对γ射线损伤雄性小鼠免疫器官及生殖器官的保护作用。方法 将50只雄性小鼠随机分为正常对照组、模型组及低(0.5g/kg·d)、中(1.0g/kg·d)、高(2.0g/kg·d)三个剂量鲨鱼软骨粘多糖组,每天一次灌胃给药,给药体积为0.4ml/20g,灌胃2周后,除正常对照组外,各组均以剂量率为0.83Gy/h的⁶⁰Coγ射线进行一次全身照射,照射剂量为5Gy。于辐照前1d,辐照后3d、14d测定小鼠体重、外周血白细胞数,辐照后14d测定小鼠胸腺指数,脾指数,骨髓有核细胞计数、睾丸重量指数,精子总数及精子畸形率。结果 鲨鱼软骨粘多糖可使辐照后3d中、高剂量组小鼠外周血白细胞数明显高于模型组(P<0.05),辐照后14d,中、高剂量组小鼠的胸腺指数、骨髓有核细胞数及精子总数明显高于模型组(P<0.05),高剂量组小鼠的脾指数及睾丸重量指数显著高于模型组(P<0.05),中、高剂量组的精子畸形率显著低于模型组(P<0.01)。结论 鲨鱼软骨粘多糖对辐射损伤小鼠的免疫器官及生殖器官具有一定的保护作用。     

羊栖菜多糖复方对雄性小鼠免疫及生殖器官辐射伤的防护

目的观察羊栖菜多糖复方制剂对γ射线损伤雄性小鼠免疫器官及生殖器官的防护作用。方法将50只雄性小鼠随机分为正常对照组、模型组及低〔0.692 g/(kg.d)〕、中〔2.075 g/(kg.d)〕、高〔4.150 g/(kg.d)〕3个剂量羊栖菜多糖复方制剂组(SFPCP),每天1次灌胃给药,灌胃2周后,除正常对照组外,各组均以剂量率为0.83 Gy/h的60Coγ射线进行1次全身照射6 h,照射剂量为5 Gy。于照前1 d,照后3 d、14 d测定外周血白细胞数,照后14 d测定小鼠胸腺指数、脾指数、骨髓有核细胞数(BMNC)、睾丸质量指数、精子总数及精子畸形率。结果照后14 d,中剂量给药组外周血白细胞数为(1.4±0.2)×109/L,明显高于模型组(1.0±0.5)×109/L(P<0.05);照后14 d,低、中、高3个剂量组小鼠的胸腺指数分别为(2.21±0.63)mg/g、(2.10±0.43)mg/g及(2.03±0.32)mg/g,明显高于模型组的(1.58±0.58)mg/g(P<0.05),中、高剂量组的脾指数和骨髓有核细胞数显著高于模型组的(P<0.05);中、高剂量组睾丸质量指数分别为(3.55±0.30)mg/g和(3.57±0.31)mg/g,明显高于模型组(3.26±0.30)mg/g(P<0.05),低、中、高剂量组精子总数分别为(17.5±6.2)×104,(19.0±7.0)×104和(20.8±11.4)×104,明显高于模型组(12.2±7.4)×104(P<0.05),中、高剂量组的精子畸形率显著低于模型组(P<0.05,P<0.01)。结论羊栖菜多糖复方制剂对小鼠的免疫器官及生殖器官的辐射损伤具有一定的保护作用。     

Efficacy of polysaccharide from Alcaligenes xylosoxidans MSA3 administration as protection against γ-radiation in female rats

Damage to normal tissues is a consequence of both therapeutic and accidental exposures to ionizing radiation. A water-soluble heteropolysaccharide called AXEPS, composed of glucose, galactose, rhamnose and glucouronic acid in a molar ratio of nearly 1.0:1.6:0.4:2.3, respectively, was isolated from culture medium of strain Alcaligenes xylosoxidans MSA3 by ethanol precipitation followed by freeze-drying. Chemical analysis, Fourier-transform infrared (FTIR) and chromatographic studies revealed that the molecular weight was 1.6 × 10⁴ g mol⁻¹. This study was designed to investigate the radioprotective and biological effects of AXEPS in alleviating the toxicity of ionizing radiation in female albino rats. A total of 32 female albino rats were divided into four groups. In the control group, rats were administered vehicle by tube for four weeks. The second group was administered AXEPS (100 mg/kg) orally by gavage for four weeks. Animals in the third group were exposed to whole-body γ-rays (5 Gy) and remained for 2 weeks without treatment. The fourth group received AXEPS (100 mg/kg) orally by gavage for two weeks before being exposed to whole-body γ-rays (5 Gy), then 24 h post γ-rays, they received AXEPS (100 mg/kg) in a treatment continuing till the end of the experiment (15 days after the whole–body γ-irradiation). Oral administration of AXEPS (100 mg/kg) significantly reversed the oxidative stress effects of radiation, as evidenced by the decrease in DNA damage in the bone marrow. Assessment of apoptosis and cell proliferation markers revealed that caspase-3 significantly increased in the irradiated group. Moreover, a significant decrease in the hematological constituents of peripheral blood, the chemotactic index and CD8+ T cells were observed in animals in the irradiation-only group, whereas an increase in the lymphocyte index was observed in animals in that group. In contrast, AXEPS treatment prevented these alterations. From our results, we conclude that AXEPS is a potent antioxidant and treatment agent for protection from γ-rays.     

乳铁蛋白对小鼠的辐射防护作用

目的 研究乳铁蛋白对辐射损伤小鼠的保护作用。方法 小鼠随机分成3组,空白对照组、单纯照射组、给药组。给予6.8Gy照射剂量小鼠30d观察各组存活率实验;给予2Gy照射剂量观察各组小鼠的骨髓微核率并对有核细胞进行计数。结果 单纯照射组小鼠照后死亡率较高,25d全部死亡,与给药组比较存活时间差异有统计学意义(P < 0.05),一般情况也有统计学意义(P < 0.05)。单纯照射组照后小鼠骨髓有核细胞数明显下降,而乳铁蛋白给药组(包括照前给药和照后给药)高于单纯照射组,比较差异有统计学意义(P < 0.05)。单纯照射组照后3d小鼠骨髓的微核细胞率明显升高,而乳铁蛋白给药组低于单纯照射组,比较差异有统计学意义(P < 0.05)。结论 乳铁蛋白无论是照前给药还是照后给药都具有较好的抗辐射作用。     

枸杞多糖对慢性辐射小鼠细胞凋亡及bc1-2基因表达的影响

目的:探讨枸杞多糖(LBP)对辐射小鼠细胞凋亡及凋亡相关基因bcl-2表达的影响。方法:以水提取-乙醇沉淀法制备枸杞多糖,并制成0.8%的饲料,给予受试小鼠(枸杞多糖组)。正常对照组、辐射对照组给予普通饲料。除正常对照组外,另两组均用60Coγ射线对动物进行全身性照射,每天照射1次,每天照射剂量为0.084Gy,每周照射5d,连续照射6w,照射总剂量为2.52Gy。检测骨髓微核率、睾丸精母细胞染色体畸变、精子畸形率、肝细胞caspase-3mRNA表达水平、细胞凋亡及凋亡相关基因bc1-2表达等指标。结果:LBP可使辐射引起的微核率、染色体畸变、及精子畸形率显著降低,骨髓细胞增殖活性提高,凋亡率降低,使辐射小鼠bc1-2基因表达提高、caspase-3mRNA表达水平降低。结论:枸杞多糖的抗辐射作用与其调控细胞bc1-2基因表达,影响细胞凋亡有关。     

Radioprotective potential of an herbal extract of Tinospora cordifolia

A preparation of Tinospora cordifolia (RTc) administered i.p. (200 mg/kg b.w.) to strain "A" male mice 1 h before whole body gamma-irradiation was evaluated for its radioprotective efficacy in terms of whole body survival, spleen colony forming units (CFU), hematological parameters, cell cycle progression, and micronuclei induction. Preirradiation treatment with RTc rendered 76.3% survival (30 days), compared to 100% mortality in irradiated control and prevented radiation induced weight loss. On 10th postirradiation day, the endogenous CFU counts in spleen were decreased with increasing radiation doses 12.0 (5 Gy), 2.16 (7.5 Gy) and 0.33 (10 Gy) but pre-irradiation administration of 200 mg/kg b.w. of RTc increased CFU counts to 31.16, 21.83 and 3.00 respectively. Pre-irradiation RTc treatment could restore total lymphocyte counts (TLC) by the 15th day to normal. It also increased the S-phase cell population that was reduced following 2 Gy irradiation in a time dependent manner. 2 Gy irradiation-induced micronuclei were also decreased by a pre-irradiation administration of RTc from 2.9 to 0.52%. Because the radioprotective manifestation of RTc observed in several systems in experimental animals can be exploited for human applications.     

补肾单药和复方对急性电离辐射损伤后小鼠外周血作用的研究

目的 探究补肾单药（CP）和复方（KS）对急性电离辐射损伤后小鼠造血的调控作用。方法 9~10周龄C57BL/6小鼠分成空白对照组、照射组、照射+KS和照射+CP 4组,照射组、照射+KS和照射+CP三组进行5.5 Gy ¹³⁷Cs-γ射线单次全身照射,剂量率1 Gy/min。照射后,照射+KS组按1.5 g/kg体重灌服KS药液,照射+CP组按2.7 g/kg体重灌服CP药液,其余两对照组灌服等体积生理盐水。每月取血监测血常规。另取小鼠按同样方式分组,照射后连续给药一个月,检测间充质干细胞集落形成。结果 照射+KS组和照射+CP组在前两个月的白细胞和淋巴细胞高于照射组,集落数也多于照射组。结论 KS和CP可以促进电离辐射损伤后小鼠的造血恢复。     

In vivo radioprotection of mice by 3-methyl-1-phenyl-2-pyrazolin-5-one (edaravone; Radicut), a clinical drug

Edaravone (3-methyl-1-phenyl-2-pyrazolin-5-one; Radicut) is a brain-protecting agent used clinically to treat acute ischemic stroke with a reaction mechanism of free radical scavenging. Since the initial stage of radiation damage involves the formation of free radicals, edaravone is expected to be effective in preventing lethal damage from ionizing radiation. In the present study, we used mice to examine in vivo the radioprotective effect of edaravone on whole body X-ray irradiation. A solution of edaravone was administered intraperitoneally to C3H mice (male, 10 weeks old), and they were irradiated with a total dose of 8.0 Gy. Edaravone exhibited dose-dependent and injection time-dependent radioprotection. When injected 30 min before the X-ray irradiation, it had the greatest radioprotective effect, whereas an injection after the irradiation showed no protective effect. The LD(50/30) was about 8.8 Gy for edaravone-injected mice and 6.6 Gy for control mice, yielding a DRF for edaravone (450 mg/kg bw) of 1.3. Edaravone decreased the body temperature transiently about 3-6C, but this did not seem to be responsible for the radioprotection. Since the radioprotection was observed only when the reagent was administered before the irradiation, the primary action of edaravone might be the quenching of free radicals with a short lifetime generated by the irradiation.     

白藜芦醇对60Coγ射线离体照射人周围血淋巴细胞保护作用研究

目的 探讨白藜芦醇(RES)对60Coγ射线离体照射人周围血淋巴细胞的保护作用.方法 采集男性健康志愿者周围血分离培养淋巴细胞,设不加RES的照射对照组,照射前30 min分别给予RES 0.1、0.2和0.4 mmol/L的3个照射前给药组,及照射后立即分别给予RES 0.1、0.2和0.4 mmol/L的3个照射后给药组.用4 Gy60Coγ射线进行照射,采用淋巴细胞胞质分裂阻滞(CB)法和Annexin V-FITC/PI双染法分析淋巴细胞微核率和凋亡率的变化.结果 ①3个照射前给药组的微核率及凋亡率比照射对照组低(P ＜0.01 ～P＜0.001);②0.2、0.4 mmol/L照射后给药组微核率比照射对照组低(P＜0.05,P＜0.01),3个照射后给药组凋亡率比照射对照组低(P＜0.05～P＜0.01);③3个照射前给药组微核率均比3个照射后给药组低(P＜0.01～P＜0.001),0.4 mmol/L照射前给药组在抑制凋亡率方面强于0.4mmol/L照射后给药组(P＜0.05).结论 RES可以通过抑制60Coγ射线离体照射引起的人周围血淋巴细胞的微核率和凋亡率的升高,对辐射诱导的淋巴细胞DNA损伤起到防护作用,其辐射防护效果与RES的给药时间及给药剂量有关.     

银耳多糖辐射防护作用的研究

目的 研究银耳多糖对辐射损伤小鼠的保护作用。方法 采用小鼠30天存活率和外周血液学参数考察银耳多糖对辐射损伤小鼠的保护作用。结果 小鼠在接受8Gy伽玛射线照射前连续三天以18,54,72 mg/kg剂量腹腔注射银耳多糖,可以明显减轻照射对小鼠造成的损伤,使存活率增强,存活天数延长。外周血中血红蛋白含量、白细胞数、红细胞数在照射后第14,18天保持较高水平,与单纯照射组相比有统计学意义(P < 0.05)。结论 银耳多糖对辐射损伤小鼠有较好的保护作用。     

Protective effect of hydroferrate fluid,MRN-100, against lethality and hematopoietic tissue damage in γ-radiated Nile tilapia,Oreochromis niloticus

Hydroferrate fluid, MRN-100, an iron-based compound derived from bivalent and trivalent ferrates, is a potent antioxidant compound. Therefore, we examined the protective effect of MRN-100 against γ-radiation-induced lethality and damage to hematopoietic tissues in fish. A total of 216 Nile tilapia fish (Oreochromis niloticus) were randomly divided into four groups. Group 1 served as a control that was administered no radiation and no MRN-100 treatment. Group 2 was exposed only to γ-radiation (15 Gy). Groups 3 and 4 were pre-treated with MRN-100 at doses of either 1 ml/l or 3 ml/l in water for 1 week, and subsequently exposed to radiation while continuing to receive MRN-100 for 27 days. The survival rate was measured, and biochemical and histopathological analyses of hematopoietic tissues were performed for the different treatment groups at 1 and 4 weeks post-radiation. Exposure to radiation reduced the survival rate to 27.7%, while treatment with MRN-100 maintained the survival rate at 87.2%. In addition, fish exposed to γ-radiation for 1 week showed a significant decrease in the total number of white blood cells (WBCs) and red blood cells (RBCs) series. However, treatment with MRN-100 protected the total WBC count and the RBCs series when compared with irradiated fish. Furthermore, significant histological lesions were observed in the hepatopancreas, spleen and gills of irradiated fish. However, treatment with MRN-100 protected the histopathology of various organs. We conclude that MRN-100 is a radioprotective agent in fish and may be useful as an adjuvant treatment to counteract the adverse side effects associated with radiation exposure.     

山楂醇提物腹腔注射对辐射损伤小鼠保护作用的研究

目的 研究山楂醇提物腹腔注射对辐射损伤小鼠的保护作用。方法 昆明种雄性小鼠60只被分为五组:正常对照、放射对照、药物高、中、低剂量组。各药物组腹腔内注射一次药物,其余两组给予生理盐水,1h后实验组小鼠用⁶⁰Coγ射线6Gy照射。分别在照射前4h、照后6d、照后12d称量小鼠体重、检测血象三次。在照后12d,处死小鼠,测股骨骨髓DNA含量、骨髓有核细胞数。结果 ①高剂量组8只小鼠注射药物后腹腔感染出血死亡,其余实验小鼠均存活。②同放射对照组比,三种浓度的山楂醇提物可以促进受辐射损伤小鼠外周血白细胞、血小板数的恢复。结论 山楂醇提物腹腔注射可促进受辐射损伤小鼠造血功能的恢复,对骨髓DNA及有核细胞有一定的保护作用。