Enhanced CD3+/CD4+ T cell activities and modulation of Th1/Th2 lineage development in irradiated rats due to treatment with the male zooid of antheraea pernyi extracts

Objective  Cancer patients undergoing large dose radiotherapy exhibit multifaceted defects in their immune capacity that are likely to contribute to an increased susceptibility to infections and disease progression. The immune impairment may also constitute a barrier to effective immunotherapeutic interventions. Here, we evaluate whether supplementation with the male zooid of Antheraea pernyi extracts could enhance immune function in irradiated rats. Methods  Fifty male Wistar rats were randomly divided into a control group, a simple radiation group and a treatment group. The mice in the simple irradiation and treatment groups were given whole-chest irradiation with 6Gy. In the treatment group, the male zooid of Antheraea pernyi extracts was gavaged at the doses of 16.53mg/kg (large dose group), 2.62mg/kg (medium dose group), and 0.564mg/kg (small dose group) once a day for 14 days. The thymus and spleen indices were calculated. T cell subsets in peripheral blood were determined by flow cytometry and the expressions of IL-2, IFN-γ, IL-4 and IL-10 in sera were determined by ELISA on the 15th day. Results  The thymus index and spleen index of the high dose treatment group were statistically lower than that of the control group and higher than that of the radiation group (P<0.01). CD3+ and CD4+ T cells in the peripheral blood were increased in the high dose treatment group and decreased in the radiation group (P<0.01). Expression of IL-2 and INF-γ in the radiation group was lower than that in control, and significantly increased during therapy. The production of IL-4 and IL-10 could be induced by radiation and was inhibited in the high dose treatment group (P<0.01). Conclusion  Our data indicate that the male zooid of Antheraea pernyi extracts may be administrated to improve immune function in irradiated rats and reverse the radial immune inhibition of rats by stimulating the proliferation of Th cells and inducing the differentiation of Th2 to Th1. This work was supported by the grants from the National Natural Science foundation of China (No. 30472260), the Administration of Traditional Chinese Medicine of Shandong Province, China(No. 2005-109),, and the Health Protection Committee of Shandong Province, China(No. 2006059).     

柞蚕雄蛾提取液对放疗后大鼠脾细胞中Th1/Th2类细胞因子的影响

目的：探讨柞蚕雄蛾提取液对放疗后大鼠脾细胞表达Th1类细胞因子IL-2、IFN-g和Th2类细胞因子IL-4、IL-10的影响,分析其作用机制。方法：将30只Wistar雄性大鼠随机分为对照组、单纯放疗组和药物治疗组,于放疗后第14天观察各组大鼠的胸腺和脾脏指数变化,用免疫组化法检测大鼠细胞表达IL-2、IFN-g和L-4、IL-10水平的变化。结果：单纯放疗组与对照组大鼠相比,其胸腺和脾脏指数明显下降,脾细胞表达IL-4和IL-10的水平增加,差异有统计学意义,P〈0.05。但IL-2和IFN-g的表达无明显变化,P〉0.05。药物治疗组与单纯放疗组相比大鼠的胸腺、脾脏指数明显增加,脾细胞表达IL-2和INF-g的水平增加,IL-4和IL-10的水平下降,P〈0.05。结论：柞蚕雄蛾提取液可以有效降低放疗引起的免疫抑制,该作用可能与其诱导Th1类细胞因子的表达以及促进Th2样细胞因子向Th1类细胞因子漂移有关。     

辐射诱发大鼠体内旁效应中肺及肾组织凋亡相关基因mRNA的表达变化

目的：探讨不同剂量X射线辐射诱发大鼠体内旁效应中肺和肾组织凋亡相关基因的表达变化。方法：70只雄性Wistar大鼠随机分为正常对照组和不同剂量、不同时间的辐射组,共10组,每组7只。除正常对照组外,其余各组大鼠分别给予2、4、8 Gy X射线单次照射右肺部,铅皮屏蔽身体其余部位。分别于照射后6、24、48 h处死辐射各组大鼠,实时荧光定量PCR检测大鼠右肺、左肺、左肾组织中Cytc、Caspase-9、Caspase-3、Bax和Bcl-2 mRNA表达的变化。结果：与正常对照组比较,2、4、8 Gy辐射各组大鼠右肺、左肺、左肾中Cytc、Caspase-9、Caspase-3 mRNA表达量在照射后均明显升高（P < 0.05或P < 0.01）。除右肺8 Gy辐射后48 h组和左肾2 Gy辐射后6 h组之外,其余辐射组Bax mRNA表达量均明显升高,与正常对照组比较,差异均有统计学意义（P < 0.05或P < 0.01）。除左肾8 Gy辐射后6 h组之外,其余辐射组Bcl-2 mRNA表达量均降低,与正常对照组比较,差异均有统计学意义（P < 0.05或P < 0.01）。结论：不同剂量X射线照射大鼠右肺部后,右肺组织中Cytc、Caspase-9、Caspase-3、Bax表达均显著上调,Bcl-2明显下调。左肺和左肾中未直接受照射组织也对X射线辐射产生了响应,辐射诱导了体内旁效应的产生。各辐射剂量之间、各时间点之间尚未发现明显的效应差异。     

软骨肉瘤患者Th1/Th2的变化

目的观察软骨肉瘤患者T淋巴细胞亚群中Th1/Th2的变化,为细胞因子免疫治疗提供依据。方法应用放射免疫分析法以及酶联免疫分析法检测32例软骨肉瘤患者血清中IL-2、IL-4、IL-6、IL-10、IL-12的含量,检测外周血单个核细胞在有或无植物血凝素(PHA)存在情况下培养上清中IL-2、IL-4含量。结果软骨肉瘤患者血清及培养上清中IL-2、IL-12减少(P＜0.001),而IL-10、IL-4、IL-6含量增加(P＜0.01),在使用PHA刺激时,患者淋巴细胞分泌IL-2能力显著降低,而IL-4显著升高。结论软骨肉瘤患者体内存在有Th1/Th2平衡失调,其中Th1亚群功能抑制,Th2亚群功能亢进。     

Study of Immune Response and Malondialdehyde Levels in Irradiated Rats Supplemented with Curcuma xanthorriza Roxb Extract

Objective: The purpose of this study was to assess the immune response and malondialdehyde levels in irradiated rats supplemented with Curcuma xanthorriza Roxb extract as a candidate for mitigating radiation exposure. Methods: Twenty-four male Wistar rats were grouped into eight treatment groups, then Curcuma xanthorrhiza Roxb extract was administered orally and irradiated at 6 Gy. Measurement of rats IL-6 and INF-γ was performed using a sandwich ELISA Kit, while the MDA concentration was quantified according to the method of Wills (1971). The statistical test is determined by one way ANOVA test. P-value <0.05 was considered statistically significant. Result: The concentration of IL-6 in all groups showed no statistically significant difference (P=0.18). There was an increase in the concentration of IL-6 in the group of rats irradiated with 6 Gy for 7 days and 14 days. Meanwhile, the INF-γ concentration also showed no significant results in all treatment groups (P=0.28). The average of MDA concentration showed a significant difference in the liver and spleen of irradiated rats at 6 Gy for 14 days compared to the control (0.044 nmol/mg vs 0.008 nmol/mg, P=0.03 and 0.032 nmol/mg vs 0.014 nmol/mg, P=0.05, respectively). Conclusion: The administration of Curcuma xanthorriza Xorb extract was able to reduce MDA concentrations in the liver and spleen although not statistically significant. In addition, exposure to ionizing radiation at a dose of 6 Gy significantly increased lipid peroxidation in the liver and spleen by 5.5 times and 2.3 times, respectively.     

Th1/Th2淋巴细胞因子及PCT检测在成人急性白血病感染中的诊断价值北大核心

目的:分析Th1/Th2淋巴细胞因子及PCT检测在成人急性白血病感染中的诊断意义,并分析不同病原菌感染患者Th1/Th2淋巴细胞因子及PCT结果是否存在差异,为临床工作中对急性白血病感染患者的有效抗感染治疗提供依据。方法:回顾性分析2020年05月至2020年12月之间我科收治的128例成人急性白血病患者感染情况、临床资料、Th1/Th2淋巴细胞因子及PCT结果,采用SPSS 25.0统计软件进行统计学分析。结果:128例急性白血病患者中,感染组97例,非感染对照组31例,其中26例血培养阳性;感染与非感染组IL-6、IL-10及PCT具有统计学差异(P<0.05),且感染组水平明显高于非感染组;IL-6、IL-10及PCT区分感染的ROC曲线做图得AUC分别为0.907、0.759及0.881;IL-10在G^(+)与G^(-)中存在差异(P<0.05),IL-10、IL-4与IFN-γ在真菌和G^(-)中存在差异(P<0.05),PCT、IL-4与IFN-γ在真菌和G^(+)中存在差异(P<0.05)。结论:IL-6、IL-10可作为成人急性白血病患者诊断感染除PCT外的参考指标,且通过ROC曲线可以看出,IL-6、IL-10对感染具有良好的预测意义。并且通过分析病原菌发现,IL-10、IL-4与IFN-γ将可能成为区分病原菌类型的良好指标。     

胃癌患者化疗前后Th1/Th2细胞因子的检测及其临床意义

目的 研究胃癌患者化疗前后CD4+T淋巴细胞中Th1、Th2类细胞因子的表达水平和Th1/Th2值的变化及其临床意义.方法 60例胃癌患者接受FOLFOX4方案化疗,应用流式细胞仪对化疗前后患者外周血特异性细胞因子的表达变化进行分析.结果 化疗后,全组胃癌患者外周血CD4+T淋巴细胞分泌的γ干扰素(IFN-γ)的表达水平为11.4%±5.0%,较化疗前升高(P＜0.05);白介素10(IL-10)的表达水平为3.6%±1.2%,较化疗前降低(P＜0.05);Th1/Th2(IFN-γ/IL-4)的值为3.4±1.0,与化疗前比较,无明显变化(P＞0.05).15例化疗后疗效为部分缓解的患者,外周血CD4+T淋巴细胞分泌的IFN-γ和肿瘤坏死因子-α(TNF-α)的表达水平分别为14.8%±8.0%和5.9%±2.0%,均较化疗前升高(均P＜0.05);Th1/Th2(IFN-γ/IL-4)的值为4.0±1.5,明显高于化疗前水平(P＜0.01).结论 有效的化疗可减轻患者机体的肿瘤负荷,降低Th1类细胞因子向Th2类细胞因子漂移的程度;但胃癌化疗的有效率较低,因此对胃癌化疗者,改善机体免疫功能仍是很重要的治疗措施.     

Polysaccharide extracted from Rheum tanguticum prevents irradiation-induced immune damage in mice

Aim: To investigate the protective effect of purified fraction 1 polysaccharide extracted from Rheum tanguticumRTP1 on irradiation-induced immune damage in mice. Methods: Kunming mice were randomly divided into fivegroups: normal group (NC), irradiation control group (IC), RTP1 low dose (200 mg/kg), middle dose (400 mg/kg)and high dose (800 mg/kg) groups. RTP1 was adminstered by the gastric route for 14 d, mice in the NC and ICgroups being given by 0.9% sodium chloride solution in the same way. The mice in all groups except NC groupwere irradiated with 2.0 Gy 60Co γ-ray on the fourteenth day. Immune indives of non-specific immune function,cellular immunity and humoral immunity were assessed at the 24th hour after radiation. Results: Comparedwith the IC group, the spleen index, thymus index, rate of carbon clearance, phagocytic function of macrophages,lymphocyte proliferation, hemolysin value of blood serum and NK activity were increased markedly (P < 0.05or P < 0.05). Conclusion: RTP1 has an obvious protective effects on damage in γ-ray radiated mice.     

Mitigation of radiation-induced optic neuropathy in rats by ACE inhibitor ramipril: importance of ramipril dose and treatment time

Purpose Radiation-induced optic nerve damage was reduced by ramipril, a prodrug angiotensin-converting enzyme inhibitor (ACEI). This study was to determine the optimum dose and administration time of ramipril for mitigating radiation-induced optic neuropathy. Materials and method Adult Fischer 344 male rats were treated with a single dose radiation 30 Gy by using radiosurgical technique. After irradiation, the animals were randomly assigned into groups of different ramipril doses and administration time; control (no treatment), radiation alone, radiation + ramipril in different doses and starting times of drug. Ramipril was given 0.5–1.5 mg/kg/day and AT1R blocker Losartan 20 mg/kg/day in drinking water for 180 days. Functional endpoint with visual evoked potential (VEP) and anatomical endpoint with gross and histological analysis with immunohistochemical (IHC) stain were used. Results Normal VEP measurements in un-irradiated rats were 46.2 ± 7.9 ms. There was no change of VEP value until 4 months, but was lengthened to 188.1 ± 58.7 ms at 6 months after radiation. By ramipril treatment with the dose of 1.5 mg starting at 2 weeks after radiation, VEP was significantly shortened to 105.7 ± 88.5 ms at 6 months. Gross and microscopic structure of the irradiated optic nerve was well preserved in the ramipril-treated group. Conclusion Ramipril can mitigate the radiation-induced optic nerve damage and preserve the functional integrity of the nerve. The results support early treatment with a high dose of ramipril after radiation.     

大肠癌患者外周血Th1/Th2的检测及其临床意义

目的 检测大肠癌患者外周血CD+4细胞Th1、Th2细胞因子的表达水平,观察大肠癌患者Th1/Th2漂移的幅度,探讨Th1、Th2细胞因子与大肠癌发生、发展的关系.方法 采取实验对象的清晨空腹静脉血标本,用Th1、Th2细胞因子标记流式细胞技术检测Th1类细胞因子IFN-γ,Th2类细胞因子IL-4,计算Th1/Th2(IFNγ/IL-4),进行统计学分析.结果 大肠癌患者IFN-γ的表达率为(11.7±1.86)%,健康对照组IFN-γ的表达率为(16.4±6.07)%,大肠癌组比健康对照组明显减低,差异有统计学意义(P＜0.05).大肠癌患者IL-4的表达率为(2.8±0.32)%,健康对照组IL-4的表达率为(1.8±0.19)%,大肠癌组比健康对照组升高,差异有统计学意义(P＜0.05).大肠癌患者外周血IFN-γ/IL-4为4.2±0.94,健康对照组外周血IFN-γ/IL-4为9.7±1.11,差异有统计学意义(P＜0.05).结论 大肠癌患者外周血CD+4细胞表达Th2型细胞因子占优势,Th1/Th2平衡失调,向Th2方向漂移,导致机体免疫功能低下,是大肠癌复发或转移的原因之一.     

CD11c+细胞特异性敲除TAK1对刀豆蛋白A诱导的免疫性肝损伤的影响

目的：探讨CD11c⁺细胞中敲除TAK1对刀豆蛋白A（Con A）诱导的小鼠免疫性肝损伤的影响。方法：采用体内CD11c⁺细胞中特异性敲除TAK1的C57BL/6小鼠,经鼠尾静脉注射Con A（12 mg/kg）或生理盐水,分别作为Con A敲除组和生理盐水敲除组。另选C57BL/6小鼠,鼠尾静脉注射Con A（12 mg/kg）或生理盐水,作为Con A对照组和生理盐水对照组。给药6 h之后测定血清中丙氨酸氨基转移酶（ALT）、天门冬氨酸转移酶（AST）和乳酸脱氢酶（LDH）水平;检测肝、肾、胸腺等脏器系数并进行肝组织病理学观察和评分;测定血清中免疫反应相关细胞因子肿瘤坏死因子α（TNF-α）、干扰素γ（IFN-γ）、白细胞介素（IL-4/5/6/12）及肝组织中TNF-α和IFN-γ的表达水平。结果：与生理盐水对照组相比,Con A对照组ALT和LDH显著升高（P均 < 0.05）,肝脏病理损伤明显加重,病理评分显著升高（P < 0.05）,血清中TNF-α、IFN-γ、IL-4/5/6水平和肝中TNF-α和IFN-γ均显著升高（P均 < 0.05）;生理盐水敲除组肝中TNF-α水平显著降低（P < 0.05）。与Con A对照组相比,Con A敲除组小鼠血清ALT、AST和LDH水平均显著升高（P < 0.05）,肝脏病理损伤明显加重,病理评分显著升高（P < 0.05）,肝组织IFN-γ水平,血清中TNF-α、IL-4和IL-6水平均显著升高（P均 < 0.05）。结论：在本实验条件下,CD11c⁺细胞中敲除TAK1无明显肝损伤作用,但可加重Con A诱导的肝脏损伤,该作用可能与进一步激活免疫反应有关。     

硒干预对DEHP暴露下SD大鼠血细胞参数的作用

目的：探讨不同剂量邻苯二甲酸二（2-乙基）己酯（DEHP）染毒后硒对大鼠外周血血细胞参数的影响。方法：将77只健康清洁级雄性SD大鼠,随机分为7组,即对照组、3个不同浓度（300、600、900 mg/kg）DEHP染毒组、1 mg/kg Se+不同剂量（300、600和900 mg/kg）DEHP染毒干预组,连续饲喂90 d,试验期间观察大鼠中毒状况（精神亢奋、被毛蓬松、局部脱毛现象）,试验期末称取大鼠体质量并取全血测定各类血细胞参数的变化。结果：与对照组比较,900 mg/kg DEHP染毒大鼠体质量明显下降（P < 0.05）,600和900 mg/kg DEHP染毒组大鼠出现中毒体征比例分别为63.63%（7/11）和100%（11/11）,均较对照组0（0/11）显著升高（P均 < 0.05）。与相同剂量DEHP染毒组比较,1 mg/kg Se干预后大鼠体质量均明显增加,差异均有统计学意义（P均 < 0.05）;300、600 mg/kg DEHP染毒组大鼠中毒体征明显降低（P均 < 0.05）。白细胞参数中,与对照组比较,600和900 mg/kg DEHP染毒组大鼠白细胞数（WBC）明显降低、单核细胞（MONO）显著升高,差异均有统计学意义（P均 < 0.05）。与相同剂量DEHP染毒组比较,1 mg/kg Se+600 mg/kg DEHP干预组白细胞数（WBC）明显升高、单核细胞（MONO）显著降低（P < 0.05）。红细胞参数中,与对照组比较,DEHP染毒后大鼠平均血红蛋白量（MCH）、血红蛋白含量分布宽度（HDW）均明显升高;600、900 mg/kg DEHP染毒组大鼠红细胞数（RBC）、红细胞压积（HCT）明显降低（P < 0.05）。与相同剂量DEHP染毒组比较,1 mg/kg Se干预后大鼠红细胞参数未见显著差异。血小板参数中,未发现DEHP染毒与Se干预对SD大鼠血小板各参数产生显著影响。结论：300~900 mg/kg DEHP染毒可对大鼠某些红细胞和白细胞参数产生影响,硒的干预在300~600 mg/kg DEHP染毒条件下可保护某些血细胞功能。     

The response of Dunning R3327 prostatic adenocarcinoma to IL-2, histamine and radiation.

A syngeneic, androgen-sensitive Dunning R3327 rat prostatic adenocarcinoma was transplanted bilaterally in the flanks of male Copenhagen Fisher rats. Approximately 3 months after implantation, when the tumours had a median volume of 150 mm3, one group of rats was treated with histamine alone (4 mg kg(-1) subcutaneously on week days), another group with human recombinant interleukin 2 (IL-2) alone (425 IU kg(-1) continuous infusion) and a third group with both histamine and IL-2 during 6 weeks. Tumours on one flank were irradiated (6 Gy once daily for 3 days to a total dose of 18 Gy) beginning 1 week after the onset of treatment with histamine and/or IL-2. The contralateral tumour served as the intra-animal control. The tumour volumes were determined weekly. The growth curves showed that all three drug treatments were effective in delaying growth, but when used individually did not cause tumour shrinkage. Radiation was the most effective single agent, but when used alone the shrinkage did not occur until 2 weeks after irradiation. When combined with the drugs, more rapid and extensive growth delay and/or shrinkage was seen. The growth curves showed clear differences between the different treatments. The combination of the three agents was the most effective of all. The most striking difference between radiation alone and radiation plus biotherapy was the time at which a tumour response was detectable. Thus, active biotherapy alone and especially in a combination with histamine and radiotherapy warrants further investigation as a potential therapeutic approach to prostate cancer.     

调节性T细胞及Th1/Th2细胞因子在急性白血病中的表达及意义

目的:探讨调节性T细胞（Tregs）及Th1/Th2型细胞因子在急性白血病发病中的作用。方法:采用流式细胞术检测37例急性白血病患者［包括急性髓细胞性白血病（acute myeloid leukemia,AML）24例,急性淋巴细胞白血病（acute lymphocytic leukemia,ALL）13例］及28例健康对照者外周血CD4+CD25+Foxp3+Tregs的比例,酶联免疫吸附法（ELISA）法检测血浆IL-2、IFN-γ、IL-10、IL-4和TGF-β水平。结果:AML和ALL患者外周血CD4+CD25+Foxp3+Tregs比例均高于健康对照组 (P＜0.05);AML及ALL患者血浆IL-4、IL-10和TGF-β水平均较健康对照组升高 (P＜0.05);IFN-γ水平较健康对照组降低 (P＜0.05);IL-2水平与健康对照组比较无明显差异 (P＞0.05)。结论:Tregs与Th1/Th2细胞因子同时参与了急性白血病的发生;急性白血病患者机体Th1/Th2细胞因子失衡,Th2占优势状态,这可能是导致急性白血病细胞免疫逃逸的原因之一;Tregs可能通过影响Th1/Th2细胞因子平衡参与急性白血病的发病。     

Immunomodulatory Effects of Hexane Insoluble Fraction of Ficus septica Burm. F. in Doxorubicin-treated Rats

The use of chemotherapeutics induces cardiotoxicity and affects immune functions, therefore development ofcombinatorial agents against cardiotoxicity and immunosuppression needs to be explored. Previous studies of thehexane insoluble fraction (HIF) of an ethanolic extract of Ficus septica leaves showed anticancer effects singlyand in combination with doxorubicin on T47D breast cancer cells. In this present study, it was evaluated for itsimmunomodulatory activities in doxorubicin-treated rats. Thirty male Sprague Dawley rats were divided intofive groups consisting of six rats each as follows: Group 1, receiving oral saline 10 ml/kg BW (control group);Group 2, receiving HIF dose 750 mg/kg BW orally, once daily; Group 3, receiving HIF dose 1.500 mg/kg BWorally, once daily; Group 4, given oral saline 10 ml/kg BW (normal group); Group 5, receiving HIF dose 1.500mg/kg BW orally, once daily. The rats of group 1-3 were intramuscularly administered with doxorubicin at adose of 4.67 mg/kg BW at the days 1 and 4 to suppress immune functions. Concomitantly, the rats were treatedwith saline or HIF for seven consecutive days (1 to 7). Treatment of HIF succeeded in reducing side effects ofdoxorubicin based on increasing lymphocyte density and phagocytosis activity and capacity of macrophages,as well as increasing the CD8+ blood level and decreasing spleen IL-10 expression. Hexane insoluble fraction ofof ethanolic extract of Ficus septica leaves has potential as a protective agent combined with doxorubicin.     

曲酸对γ射线照射致小鼠Treg/Th17比例失衡的影响

目的： 观察曲酸(KA)对4 Gy γ射线照射所致小鼠Treg/Th17细胞比例失衡的影响,以期为KA的辐射免疫损伤防护机制研究提供新思路。方法：C57BL/6雄性小鼠随机分为对照组、照射组、KA低剂量组和KA高剂量组。KA低、高剂量组小鼠分别于照射前27 h皮下注射75、300 mg/kg KA。照射组及KA低、高剂量组小鼠接受4 Gy γ射线一次性全身照射,对照组行假照射。照射后检测外周血白细胞(WBC)数量、脾脏/胸腺指数及脾脏调节性T细胞(Treg细胞)和Th17细胞比例的改变。结果：与对照组比较,4 Gy γ射线照射后,小鼠外周血WBC计数显著降低(P<0.05或P<0.01),KA高剂量组WBC计数至照后19 d恢复正常,而照射组及KA低剂量未恢复。γ射线照射后,照射组及KA低、高剂量组小鼠胸腺及脾脏指数均显著降低(P均<0.01),但KA高剂量组的胸腺及脾脏指数明显高于照射组(P均<0.01)。照后4 d,照射组与KA高剂量组脾脏Treg细胞比例显著高于对照组(P均<0.01)。照射组Th17细胞比例亦显著增高,而KA高剂量组Th17比例却显著低于照射组(P<0.05),使得Treg/Th17比值在照后4 d明显增高,导致Treg/Th17平衡向Treg方向明显偏移。结论：适当剂量的KA预防给药能明显减轻γ射线照射所致的免疫损伤,并能抑制照射所致的Th17细胞比例增高,导致Treg/Th17平衡向Treg细胞方向偏移。表明KA可抑制照射所引起的炎性反应,从而减轻机体的炎症性损伤,发挥有效的保护作用。     

大蒜提取物对X线照射小鼠免疫功能的影响

目的 探讨大蒜提取物对X线照射小鼠免疫功能的调节作用.方法 采用X线单次照射小鼠模型,在照射前3 d开始每天1次灌胃给予大蒜提取物200、400、600 mg/kg,连续14 d.于第15天断颈处死小鼠,分别测量小鼠体重、胸腺和脾脏重量,计算胸腺和脾脏指数;MTT法检测刀豆蛋白A(ConA)诱导的脾脏T淋巴细胞增殖能力;检测外周血白细胞分类及计数,采用流式细胞术检测外周血淋巴细胞亚群的分布情况.结果 与对照组相比,X线照射小鼠的胸腺重量、胸腺指数、脾脏T淋巴细胞增殖能力、外周血白细胞总数、中性粒细胞数及百分比、淋巴细胞数均降低;流式细胞学检测显示X线照射小鼠的T淋巴细胞百分比及数量、CD4+和CD8+T淋巴细胞百分比及数量均降低,CD4+/CD8+比值则升高;补充大蒜提取物,特别是补充中剂量组(400 mg/kg)小鼠这些指标一定程度上向对照组水平恢复.结论 补充大蒜提取物能够改善X线照射小鼠的免疫功能.     

柞蚕雄蛾抗肿瘤作用研究进展

柞蚕蛾作为一种昆虫药,主要通过柞蚕雄蛾中独特的活性成分发挥其提高机体免疫力作用、抗肿瘤作用和抗衰老作用,在肿瘤预防和辅助治疗中起重要作用。     

百合多糖联合大蒜素对肝癌H22荷瘤小鼠肿瘤生长及血清细胞因子水平的影响

目的:探讨百合多糖联合大蒜素对肝癌H22荷瘤小鼠肿瘤生长及血清细胞因子水平的影响。方法:雄性 BALB/c小鼠腋下注射肝癌H22细胞计数瘤液建立荷瘤模型,分为百合多糖组（100 mg/kg）、大蒜素组（40 mg/kg）、百合多糖低剂量+大蒜素组（50 mg/kg+40 mg/kg）、百合多糖中剂量+大蒜素组（100 mg/kg+40 mg/kg）、百合多糖高剂量+大蒜素组（150 mg/kg+40 mg/kg）、正常组、模型组和环磷酰胺组（30 mg/kg）。处理7 d后,观察小鼠的肿瘤重量,计算抑瘤率;胸腺、脾脏称重,计算胸腺指数和脾脏指数;ELISA法检测血清免疫相关细胞因子IL-18、TNF-α、IFN-γ、IL-2、IL-6水平及促血管生长因子VEGF水平。结果:大蒜素组、百合多糖中剂量+大蒜素组、百合多糖高剂量+大蒜素组抑瘤率分别为27.27%、34.68%和30.64%。百合多糖中剂量+大蒜素组和百合多糖高剂量+大蒜素组胸腺指数明显高于模型组(P<0.01)。百合多糖高剂量+大蒜素组较模型组明显升高IL-18水平(P<0.01)。百合多糖中剂量+大蒜素组TNF-α水平高于模型组(P<0.05)。百合多糖中剂量+大蒜素组较模型组明显升高IL-2水平(P<0.01)。百合多糖高剂量+大蒜素组较模型组降低VEGF水平(P<0.05)。结论:百合多糖联合大蒜素能抑制肝癌H22荷瘤小鼠肿瘤的生长,提高荷瘤小鼠的胸腺指数,并促进小鼠分泌免疫相关细胞因子IL-18、TNF-α、IL-2,减少分泌VEGF。