Meso-scale Discovery Assay Detects the Changes of Plasma Cytokine Levels in Mice after Low or High LET Ionizing Irradiation

Objective To obtain precise data on the changes in the levels of 29 cytokines in mice after high or low linear energy transfer(LET)irradiation and to develop an accurate model of radiation exposure based on the cytokine levels after irradiation.Methods Plasma samples harvested from mice at different time points after carbon-ion or X-ray irradiation were analyzed using meso-scale discovery(MSD),a high-throughput and sensitive electrochemiluminescence measurement technique.Dose estimation equations were set up using multiple linear regression analysis.Results The relative levels of IL-6 at 1 h,IL-5 and IL-6 at 24 h,and IL-5,IL-6 and IL-15 at 7 d after irradiation with two intensities increased dose-dependently.The minimum measured levels of IL-5,IL-6 and IL-15 were up to 4.0076 pg/mL,16.4538 pg/mL and 0.4150 pg/mL,respectively.In addition,dose estimation models were established and verified.Conclusions The MSD assay can provide more accurate data regarding the changes in the levels of the cytokines IL-5,IL-6 and IL-15.These cytokines could meet the essential criteria for radiosensitive biomarkers and can be used as radiation indicators.Our prediction models can conveniently and accurately estimate the exposure dose in irradiated organism.

Acute and persisting Th2-like immune response after fractionated colorectal γ-irradiation

AIM： To investigate if an immune imbalance may account for the development and progression of chronic radiation enteritis. We analyzed the Th1/Th2 immune response profile early and 6 mo after fractionated colorectal irradiation. METHODS： A rat model of fractionated colorectal γ-irradiation （4-Gy fractions, 3 fractions per week） was designed to investigate the effects of cumulative dose on inflammatory mediators （cytokines and chemo- kines） and immune response （Th1/Th2 profile and immunosuppressive mediator IL-10） during acute （early） response and 6 mo after the end of fractionated irradiation （chronic response）. Analyses were performed 1 d after the cumulative doses of 16 Gy and 36 Gy and 1 d, 3 d, and 26 wk after the cumulative dose of 52 Gy. RESULTS： Without causing histological damage, fractionated radiation induced elevated expression of IL-1β, TNFα, MCP-1, and iNOS in distal colonic mucosa during the early post-irradiation phase. At that time, a Th2 profile was confirmed by expression of both the Th2- specific transcription factor GATA-3 and the chemokine receptor CCR4 and by suppression of the Thl cytokine IFNγ/IP-10 throughout the irradiation protocol. After 6 mo, despite the 2-fold reduction of iNOS and MCP-1 levels, the Th2 profile persisted, as shown by a 50% reduction in the expression of the Thl transcription factor T-bet, the chemokine receptor CCXCR3, and the IFNγ/ STAT1 pathway. At the same time-point, the immunosuppressive IL-10/STAT3 pathway, known to regulate the Th1/Th2 balance, was expressed, in irradiated rats, at approximately half its level as compared to controls.This suppression was associated with an overexpression of SOCS3, which inhibits the feedback of the Thl polarization and regulates IL-10 production. CONCLUSION： Colorectal irradiation induces Th2 polarization, defective IL-10/STAT3 pathway activation and SOCS3 overexpression. These changes, in turn, maintain a immunological imbalance that persists in the long term.

G-CSF促进造血功能恢复及其机理的研究

研究了粒细胞集落生长因子（G－CSF）促进受辐射小鼠造血功能恢复的作用，并对机理进行了初步探讨。结果表明：G－CSF不仅可以促进受辐射小鼠外周血细胞的恢复；促进脾脏内源性脾结节的形成，而且可以增加骨髓细胞含量和促进骨髓细胞巨噬系造血祖细胞（CFU－GM）的形成，提高受辐射小鼠的生存率，其促进辐射后机体造血功能恢复的机理是通过刺激照射后残余造血于细胞的增殖、分化，该过程需要一段较长的时间，而不是抑制照射后即刻细胞的程序性死亡。

Expression of matrix metalloproteinases and tissue inhibitor metalloproteinases increases in X-irradiated rat ileum despite the disappearance of CD8a T cells

AIM： To investigate their expression and activity in the rat ileum after exposure to ionizing radiation along with that of the cellular effectors and molecular mediators involved in the regulation of MMPs. METHODS： Rats were exposed to a single 10-Gy dose of X-rays delivered to the abdomen. A combination of methods, such as zymography, immunohistochemistry and real time reverse transcriptase-polymerase chain reaction, were used to localize and quantify MMPs and the molecules involved in MMP activating and inhibitory pathways （plasmin/ plasminogen, TIMPs）, CD^8＋, as well as inflammatory （interleukin （IL）-1β, IL-8, tumor necrosis factor-s, TNF-α） and fibrogenic mediators （transforming growth factor- β1-3） within ileal tissue at 1, 3, and 7 d after irradiation. RESULTS： A marked increase in MMP-2 and -14 mRNA and protein levels associated with an increased activity of MMP-2 was observed in irradiated ileal tissue. MMP-2 and -14 expression was mainly observed in inflammatory, epithelial, and mesenchymal cells, whereas a slight increase in MMP-3 expression was detected in the few infiltrating macrophages at d i after irradiation. Conversely, MMP-1, -7, and -9 mRNA levels were not found to be affected by abdominal irradiation. Irradiation was found to induce disappearance of CD^8＋ cells. Furthermore, we have observed that TNF-α and IL-1β protein levels increased 6 h after irradiation, whereas those of IL-8 only increased after 3 d and was concomitant with neutrophil infiltration. In addition, the expressions of molecules involved in MMP activating and inhibitory pathways （urokinase-type plasminogen activator andtissue-type plasminogen activator; TIMP-1, TIMP-2, and plasminogen activator-inhibitor-i） were found to be increased after abdominal irradiation. CONCLUSION： This study showed that abdominal irradiation induces an acute remodeling of the ileum associated with an increased expression of MMPs and TIMPs that do not involve CD^8＋ T cells but involve mesenchymal and epithelial cells, although to a lesser extent, and probably even soluble inflammatory and fibrogenic mediators.

芍药内酯苷对放射线辐照法致血虚免疫抑制小鼠的补血作用及机制研究

目的研究芍药内酯苷对放射线辐照诱导血虚小鼠的补血作用及调控机制。方法采用放射线辐照法复制小鼠血虚模型,以四物颗粒和芍药苷为阳性对照药,灌胃芍药内酯苷,检测外周血象、脾脏指数及分离血清,用放射免疫法检测其白细胞介素-1、粒细胞-巨噬细胞集落刺激因子(granulocyte-macrophage colony stimulating factor,GM-CSF)、肿瘤坏死因子-α(tumour necrosis factor-α,TNF-α)的含量变化并采用实时荧光定量聚合酶链式反应法检测脾脏中GM-CSF和TNF-α的基因表达。结果与模型组比较,芍药内酯苷30 mg/kg组对白细胞数、脾脏指数均有升高作用(P<0.05),对GM-CSF含量水平亦有升高作用(P<0.05),但降低TNF-α的含量水平(P<0.01)及脾脏中TNF-αmRNA的表达(P<0.01)。结论芍药内酯苷作为白芍的特征性有效成分,通过对造血细胞因子的调控作用对抗放射线辐照所致的血虚状态,提示其为白芍养血敛阴功效的物质基础之一。

芍药内酯苷、芍药苷对放射线辐照致血虚小鼠IL-3,GM-CSF,IL-6及TNF-α的影响

目的:研究芍药内酯苷、芍药苷对放射线辐照致血虚小鼠的补血作用及对白细胞介素-3(IL-3)、粒细胞-巨噬细胞集落刺激因子(GM-CSF)、白细胞介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)等造血细胞因子的调控机制。方法:采用放射线辐照法复制小鼠血虚模型,灌胃芍药内酯苷、芍药苷,检测小鼠外周血象、胸腺与脾脏指数及分离血清、血浆,分析IL-3、GMCSF、IL-6、TNF-α的含量。结果:与模型组比较,芍药内酯苷30 mg/kg组及15 mg/kg组和芍药苷30 mg/kg组及15 mg/kg组均能升高白细胞值(P<0.01或P<0.05);芍药内酯苷30 mg/kg组及15 mg/kg组和芍药苷30 mg/kg组对红细胞值有升高作用(P<0.05);芍药内酯苷30 mg/kg组、芍药苷30 mg/kg组均能明显升高胸腺指数(P<0.01);芍药内酯苷30 mg/kg组、芍药苷30 mg/kg组明显升高IL-3含量水平(P<0.01);芍药内酯苷30 mg/kg组及15 mg/kg组和芍药苷30 mg/kg组均能升高GM-CSF含量水平(P<0.01或P<0.05);芍药内酯苷30 mg/kg组明显降低TNF-α含量水平,差异有统计学意义(P<0.01),芍药苷30 mg/kg组亦能降低TNF-α含量水平(P<0.05)。结论:芍药内酯苷作为白芍的特征性有效成分,与芍药苷一致具有补血作用;二者都通过对机体细胞造血因子的调控作用,促进血细胞的生成,维持造血功能的稳定,是白芍养血敛阴功效的物质基础。

rhIL-3和GM-CSF对γ线照射猴外周血淋巴细胞损伤的防护作用研究

目的 观察重组人白细胞介素 3(rh IL 3)和粒细胞巨噬细胞集落刺激因子 (GM CSF)单用与伍用对 3.0 Gyγ线照射猴外周血淋巴细胞损伤的防护作用 ,为造血生长因子用于急性放射病的治疗提供依据。方法 30只恒河猴随机分为 rh IL 3(2 0和 6 0 μg· kg- 1· d- 1 )、GM CSF(10 μg· kg- 1· d- 1 )、IL 3+GM CSF、照射对照及正常对照共 6个组。γ线全身照射 3.0 Gy连续给药 2 1d后 ,用碱磷酶免疫组织化学法检测 T细胞亚群、Bax和 Bcl 2蛋白 ,用原位末端标记方法检测淋巴细胞凋亡率。结果 1照射后外周血淋巴细胞数、T细胞及其亚群均显著低于正常组 ,照射对照组 T、TH 和 Ts淋巴细胞分别下降至正常对照组的4 2 %、4 1%和 5 7%。2单独给予 GM CSF和 GM CSF+IL 3后 ,外周血淋巴细胞数量及 T、TH 细胞的降低均受到明显抑制 ,两组的淋巴细胞数均相当于照射对照组的 1.4 8倍 ,GM CSF组 T、TH 细胞分别为对照组的 1.5 7和 1.76倍 ,GM CSF+IL 3组 T、TH 淋巴细胞分别为对照组的 1.4 8和 1.72倍。 3照射后淋巴细胞出现大量凋亡 ;用 GM CSF和 GM CSF+IL 3后能明显抑制照射引起的淋巴细胞凋亡 ,两组淋巴细胞凋亡率分别降低到照射对照组的 4 1%和 4 8%。结论 一定剂量的 GM CSF或 GM CSF+IL 3能明显抑制照射引起的?

电离辐射对伤口液中细胞因子变化的影响及苯妥英钠的作用

目的：研究电离辐射全身照射和局部照射对大鼠伤口液中细胞因子变化的影响及苯妥英钠的作用。方法：以大鼠背部置入聚乙烯醇海绵的切口伤为模型，收集伤口液，以生物活性法分别测定其中细胞因子ＴＮＦ－α、ＩＬ－１、ＴＧＦ－β、ＰＤＧＦ的活性水平。结果：６Ｇｙ全身辐射后３ｄ、５ｄ、８ｄ，伤口液中细胞因子ＴＮＦ－α、ＩＬ－１、ＴＧＦ－β、ＰＤＧＦ的活性水平明显下降，２０Ｇｙ局部辐射后伤口液中ＴＮＦ－α、ＩＬ－１的活性水平在第３天或３ｄ、５ｄ，以及ＩＬ－１、ＴＧＦ－β的活性水平在第１３天明显升高；苯妥英钠对非辐射组和辐射组伤口液中的细胞因子水平都有明显的提高。结论：全身辐射造成愈合延迟与伤口局部细胞因子水平的下降有关，而局部辐射后细胞因子水平增加的意义有待探讨；

^(137)Cs γ射线辐照对手工分血小板制品细胞因子灭活的研究

目的探讨137Cs γ射线辐照对手工分血小板制品中细胞因子的灭活作用,明确手工分血小板制品辐照处理技术的可行性。方法手工分离血小板后,用25Gy的137Cs γ射线照射,于照射后0、1、3、5d检测血小板制品中IL-β、IL-6、IL-8和TNF-α等细胞因子含量的变化;并分别于贮存的第0、5天分别进行pH值测定和血小板计数。结果对照组和照射组的细胞因子含量均随保存时间延长而显著增加,但对照组中细胞因子含量增加更为明显;而在同一保存时间对照组中细胞因子含量高于照射组(P<0.05);保存过程中,辐照组血小板计数及pH值与对照组差异无统计学意义(P>0.05)。结论137Cs γ射线辐照可以显著降低手工分血小板制品中细胞因子的水平。

低强度激光联合照射犊鼻穴和口咽部对膝骨关节炎兔细胞因子IL-1β及TNF-α的影响

目的:探讨携带针灸补泻信息的激光联合多部位照射对膝骨关节炎兔血清和关节液中细胞因子的影响。方法:40只新西兰兔随机分成对照组、模型组、穴位照射组和联合照射组。兔左侧膝关节腔内注入木瓜蛋白酶造成关节炎的病理模型,穴位照射组和联合照射组分别以低能量激光(输出功率10～20 mW)连续照射犊鼻穴和携带针灸补泻信息的脉冲激光联合照射口咽部及犊鼻穴,10 min/d,5 d为1个疗程,连续3个疗程。采用放射免疫的方法测定血清及关节液中相关细胞因子含量的变化,常规病理学切片观察膝关节软骨组织形态学变化。结果:与对照组比较,模型组血清和关节液中IL-1β及TNF-α含量均显著升高(P<0.01);与模型组比较,穴位照射组和联合照射组血清和关节液中IL-1β及TNF-α含量均下降,但以联合照射组效果显著(P<0.05);穴位照射组和联合照射组之间的IL-1β及TNF-α含量未表现出显著性差异(P>0.05)。结论:激光联合照射口咽部和犊鼻穴和激光照射犊鼻穴都能减少细胞因子IL-1β及TNF-α的生成,减轻关节软骨细胞的结构损伤,起到保护关节软骨、防治骨性关节炎的作用,但联合多部位照射效果优于单独穴位照射。

FL对辐射所致小鼠多脏器损伤的防护作用

采用 6 .0 Gy60 Coγ射线一次全身照射 BAL B/ C小鼠 ,分别于照前和照后不同时间给予 FL或与其他细胞因子 G- CSF、IL- 11和 EPO联合应用 ,观察其对小鼠外周血细胞计数的影响 ,以及使用这些细胞因子后受照小鼠心、肝、肾、肺、脾、胸腺等脏器的组织病理学改变。结果表明 ,在照前 2 h给予 FL,能加速小鼠外周血细胞尤其是白细胞的恢复 ,并可减轻照射所致小鼠心、肝、肾、肺、脾、胸腺等脏器的损伤。

Mononuclear cells from the cord blood and granulocytecolony stimulating factor-mobilized peripheral blood:is there a potential for treatment of cerebral palsy?

To investigate a possible therapeutic mechanism of cell therapy in the field of cerebral palsy using granulocyte-colony stimulating factor（G-CSF）-mobilized peripheral blood mononuclear cells（m PBMCs）,we compared the expression of inflammatory cytokines and neurotrophic factors in PBMCs and m PBMCs from children with cerebral palsy to those from healthy adult donors and to cord blood mononuclear cells donated from healthy newborns.No significant differences in expression of neurotrophic factors were found between PBMCs and m PBMCs.However,in cerebral palsy children,the expression of interleukin-6 was significantly increased in m PBMCs as compared to PBMCs,and the expression of interleukin-3 was significantly decreased in m PBMCs as compared to PBMCs.In healthy adults,the expression levels of both interleukin-1βand interleukin-6 were significantly increased in m PBMCs as compared to PBMCs.The expression of brain-derived neurotrophic factors in m PBMC from cerebral palsy children was significantly higher than that in the cord blood or m PBMCs from healthy adults.The expression of G-CSF in m PBMCs from cerebral palsy children was comparable to that in the cord blood but significantly higher than that in m PBMCs from healthy adults.Lower expression of pro-inflammatory cytokines（interleukin-1β,interleukin-3,and-6）and higher expression of anti-inflammatory cytokines（interleukin-8 and interleukin-9）were observed from the cord blood and m PBMCs from cerebral palsy children rather than from healthy adults.These findings indicate that m PBMCs from cerebral palsy and cord blood mononuclear cells from healthy newborns have the potential to become seed cells for treatment of cerebral palsy.

大鼠全脑照射后脑内炎性细胞因子含量的变化

目的:观察大鼠全脑照射后早期主要炎性细胞因子含量的变化。方法:对SD大鼠用4MeV电子线单次全脑15 Gy和30 Gy照射后,用酶联免疫吸附试验法检测照射后6 h、1 d、1 w和1个月大鼠大脑皮层中IL-1β、IL-6和TNF-α的含量。结果:与正常对照组和麻醉后对照组相比,15 Gy单次全脑照射后1月内各组以及30 Gy后1 d、1 w组,大鼠大脑皮层上清波中三种细胞因子的含量无异常变化;在30 Gy照射后6 h组皮层中IL-1β和TNF-α有明显升高,含量达536 pg/g与339 pg/g,IL-6在大脑皮层中的含量没有差别。结论:大鼠全脑照射后6 h脑组织中就有一些炎性细胞因子的升高,它们在放射性脑损伤的发病机制中可能有重要的作用。

放射性肺损伤的研究

由于在放疗过程中部分肺组织不可避免的受到照射,致使许多患者发生急、慢性放射性肺损伤(包括放射性肺炎和肺纤维化),从而严重影响了患者的生活质量,同时也限制了肿瘤靶区辐射剂量的提高而使肿瘤的控制率下降。因此,研究放射性肺损伤的发病机理及其防治对策对于放射肿瘤临床实践具有重要意义,对于核辐射的防护和意外辐射的治疗亦具有一定的指导意义。

rhIL-11对照射所致骨髓抑制猕猴的治疗作用(英文)

本研究观察了rhIL 11对γ线照射后猕猴血小板和白细胞减少症的治疗作用 ,同时比较了不同时间给药对疗效的影响。用6 0 Coγ射线 3.0Gy照射正常猕猴 ,造成骨髓抑制模型。照射后当天开始给予rhIL 1130 ,60或 12 0 μg·kg-1·day-1,连续 14天皮下注射 ,可以显著提高给药猴外周血小板数的最低值 ,虽然白细胞数最低值并未上升 ,但低于照前值 5 0 %的时间明显缩短 ,这与血小板的变化相似。照射后当天开始给予rhIL 11治疗的动物在照射后开始的 2周内红细胞数较对照组略有下降 ,但第 3周即迅速上升并超过对照组。照射后第 13天开始给予rhIL 11治疗的 4只猴 ,在照射后前 3周内外周血象与对照组相似 ,此后迅速恢复。骨髓细胞培养结果表明 ,rhIL 11治疗猴的骨髓细胞在体外形成CFU Meg ,CFU Mix ,CFU E ,BFU E和CFU GM能力明显增加。照射后第 4 5天病理组织学检查结果表明 ,照射对照组动物骨髓腔空虚并有明显出血 ,治疗组动物骨髓腔中细胞丰富 ,生长旺盛。这些结果表明 ,rhIL

橄榄苦甙对卵巢辐射损伤的防治效果

目的探讨橄榄苦甙减轻卵巢辐射损伤的效果及其机制。方法 32只成熟雌性SD大鼠随机分为4组,正常对照组和辐射组予蒸馏水10 mL/(kg·d),橄榄苦甙组和辐射+橄榄苦甙组予橄榄苦甙100 mg/(kg·d),连续灌喂12周。12周后,辐射组和辐射+橄榄苦甙组大鼠动情期时,接受5 Gy的X线盆腔照射1次。辐射后7d检测血清抗苗勒氏管激素(AMH)、IL-1、IL-6和TNF-α含量,计算卵巢组织各级卵泡数。结果与正常对照组比较,辐射组血清AMH浓度显著降低(P<0.05),血清IL-1、IL-6、TNF-α浓度升高(P<0.05);卵巢中卵泡数减少。与辐射组比较,辐射+橄榄苦甙组血清AMH升高,IL-1、IL-6、TNF-α浓度降低(P<0.05);卵泡总数增加。结论橄榄苦甙可通过抑制辐射诱导的炎症反应,减轻卵巢的辐射性损伤。

不同蓝光照射方式治疗新生儿黄疸的临床效果

目的综合分析不同蓝光照射方式治疗新生儿黄疸的临床效果。方法选取2014年12月~2016年12月我院收治的108例黄疸患儿,按照不同的蓝光照射方式随机数字表法将其分为实验组、对照组,每组54例。分析两组患儿的临床疗效、不良反应发生率及对肝功能(总胆红素、丙氨酸氨基转移酶以及碱性磷酸酶)、细胞因子(C反应蛋白、转铁蛋白)水平的影响。结果实验组患儿临床治疗总有效率显著高于对照组,差异有统计学意义(P<0.05);治疗前,两组患儿的肝功能和细胞因子水平比较,差异无统计学意义(P>0.05);治疗后,实验组患儿的肝功能和细胞因子水平显著优于对照组,差异有统计学意义(P<0.05);实验组患儿不良反应发生率显著低于对照组,差异有统计学意义(P<0.05)。结论间歇蓝光照射方法在新生儿黄疸中的疗效显著优于持续蓝光照射方法。

大黄与芒硝外敷联合红外线照射对胫腓骨骨折肢体肿胀患者的护理效果

目的探讨大黄与芒硝外敷联合红外线照射在胫腓骨骨折肢体肿胀患者中的应用效果。方法选择2021年1月—2022年1月医院收治的胫腓骨骨折肢体肿胀患者84例,按照组间基本特征具有可比性的原则分为对照组和观察组,各42例。对照组给予常规护理,观察组在对照组的基础上给予大黄与芒硝外敷联合红外线照射护理,5 d为1个疗程。比较两组患者临床疗效、治疗前后肢体周径、视觉疼痛模拟评分(VAS)、肢体肿胀改善情况、炎症因子水平及不良反应发生率。结果大黄与芒硝外敷联合红外线照射护理干预后,观察组治疗总有效率高于对照组,组间比较差异有统计学意义(P<0.05);肢体周径小于对照组,VAS评分及肢体肿胀评分低于对照组,C反应蛋白(CRP)、抗肿瘤坏死因子(TNF-α)水平低于对照组,差异均有统计学意义(P<0.05)。两组间不良反应发生率比较差异无统计学意义(P>0.05)。结论大黄与芒硝外敷联合红外线照射治疗胫腓骨骨折患者,可改善其肢体肿胀程度,缩短肢体周径,缓解疼痛,且联合治疗安全性较高。

蝎毒多肽有效组分对辐射后M-NFS-60细胞的促增殖作用

目的：观察蝎毒多肽（SVP）及IL-3对M—CSF依赖细胞株M—NFS-60促增殖作用以及对辐射后M—NFS-60细胞增殖的影响。方法：采用Alamar Blue摄入法检测细胞的增殖情况。①选择10个细胞浓度．分别于0h、2h、4h、5．5h和20h，检测细胞的增殖情况，确定M—NFS-60细胞对Alamar Blue反应所需的最佳细胞密度和孵育时间；②采用最佳细胞密度和孵育时间，观察10个SVP组分促进M—NFS-60细胞的增殖作用，筛选出SVP的有效组分；⑧M—NFS-60细胞经60Coγ-射线照射后分别给予生理盐水、SVP、IL-3、SVP＋IL-3处理48h，测定细胞增殖情况。结果：①M—NFS-60细胞的接种密度为5×10^4cells／mL时，对AlamarBlue的还原能力最强，孵育时间8h后，M—NFS-60细胞对Alamar Blue的还原率开始增强，72h达最高；②从10个SVP组分中筛选出Ⅱ3、Ⅳ能明显促进M—NFS-60细胞的增殖；③SVPⅡ3、Ⅲ3、Ⅳ或IL-3处理辐射后的细胞48h，细胞的增殖率（％）分别为121．58±2．62（113）、123．39±4．45（Ⅲ3）、123．51±5．04（Ⅳ）、140．12±1．68（IL-3），与空白对照组（100．00±0．01）相比差异有显著性（P〈0．01）；113、Ⅲ3、Ⅳ分别与IL-3联用处理细胞48h后的增殖率分别为163．98±9．20（113±IL3）、159．89±8．31（Ⅳ-IL3）、148．92±9．74（Ⅲ3±IL3），与SVP处理组比较差异有显著性（P〈0．05）。结论：蝎毒中存在促进M—NFS-60增殖的有效多肽组分，这些多肽组分能明显促进辐射后M—NFS-60细胞的增殖，并与IL-3对辐射后M—NFS-60细胞的增殖具有协同作用。

G-CSF和IL-6联合应用协同促进受照小鼠造血功能恢复的实验研究

目的 探讨G CSF和IL 6联合应用协同促进受辐射小鼠造血功能恢复的作用及机理。方法 采用F 80 0血细胞自动计数仪计数红细胞、白细胞、血小板和血红蛋白等指标。常规法进行骨髓集落培养、内源性脾结节计数。琼脂糖电泳方法检测骨髓细胞程序性死亡。结果 G CSF和IL 6联合应用促进受辐射小鼠外周血细胞的恢复 ,促进脾脏内源性脾结节的形成 ,增加骨髓细胞含量和促进骨髓细胞GM CFU的形成 ,提高受辐射小鼠的生存率。结论 G CSF和IL 6联合应用的效果优于单用的效果 ,其促进辐射后机体造血功能恢复的机理是通过刺激骨髓残余造血干细胞的恢复 ,该过程需要一段较长的时间 。