氨氯地平抑制小鼠黑色素瘤高转移细胞株B16体内转移的作用及相关机制研究

目的:研究不同剂量氨氯地平抑制小鼠黑色素瘤高转移细胞株B16转移的作用,并探讨其作用机制。方法:选取64只C57BL/6J小鼠,将黑色素瘤髙转移细胞株B16接种在小鼠腹股沟皮下(2×106个/只)。将接种后的小鼠以随机数字表法分为对照组和氨氯地平高、中、低剂量治疗组,对照组小鼠仅给予0.9%氯化钠注射液;治疗组小鼠给予不同剂量的氨氯地平治疗,分别为1 mg/kg(低剂量组)、3 mg/kg(中剂量组)和10 mg/kg(高剂量组)。观察各组小鼠肿瘤生长情况及身体情况;观察各组小鼠肿瘤肺转移情况,计算肺转移的结节及肿瘤抑瘤率;采用免疫组织化学法检测各组小鼠肿瘤组织中白细胞介素8(IL-8)蛋白表达水平;采用逆转录-聚合酶链反应(RT-PCR)检测各组小鼠肿瘤组织中IL-8的信使核糖核酸(mRNA)表达水平。结果:氨氯地平对小鼠黑色素瘤高转移细胞株B16的自发性肺转移有显著的抑制作用;治疗组小鼠肿瘤组织中IL-8蛋白表达均明显减弱,且随氨氯地平剂量的增加而减弱;治疗组小鼠肿瘤组织中IL-8的mRNA的表达明显低于对照组,且IL-8的mRNA的表达随氨氯地平剂量的增加而减弱。结论:氨氯地平对小鼠黑色素瘤高转移细胞株B16有一定的抑瘤和抑制肺转移作用,其作用可能与影响IL-8的表达有关。     

土贝母苷甲对小鼠B16黑色素瘤和Lewis肺癌转移的抑制作用

目的:本研究旨在探讨土贝母苷甲对小鼠B16黑色素瘤和Lewis肺癌转移的影响。方法:采用裸BALB/c小鼠B16黑色素瘤实验转移和裸BALB/c小鼠Lewis肺癌自发转移模型研究土贝母苷甲对肿瘤转移的影响;采用免疫组织化学法检测土贝母苷甲对转移相关基因CD44v6、ErbB-2和nm23-H1表达的影响。结果:腹腔注射低于全身中毒水平剂量的土贝母苷甲明显减少接种B16黑色素瘤细胞小鼠的肺重和肺转移灶数量,而对小鼠的健康和活力无明显影响;土贝母苷甲(2、3 mg.kg-1.d-1×14 d)和环磷酰胺(50 mg.kg-1.wk-1×2 d)对B16黑色素瘤细胞肺转移的抑制率分别为68.8%、82.8%和49.1%。土贝母苷甲治疗组小鼠Lewis肺癌原发肿瘤的平均瘤重明显低于对照组(P<0.05)。土贝母苷甲(2、3 mg.kg-1.d-1×14 d)和环磷酰胺(50 mg.kg-1.w-1×2 d)治疗组小鼠的肝转移抑制率分别为46.3%、52.0%和54.7%。土贝母苷甲显著下调促转移基因CD44v6和ErbB-2的表达,上调抑转移基因nm23-H1的表达。结论:土贝母苷甲对小鼠B16黑色素瘤的实验性转移和Lewis肺癌的自发性转移都有显著的抑制作用。土贝母苷甲对肿瘤转移的这种抑制作用与其抑制原发肿瘤生长、下调促转移基因CD44v6和ErbB-2及上调抑转移基因nm23-H1的表达有关,提示土贝母苷甲是一个阻止癌扩散和转移的候补化合物。     

GHGKHKNK八肽抑制小鼠恶性黑色素瘤B16-F10转移及其机制的实验研究

目的：探讨GHGKHKNK八肽抑制小鼠恶性黑色素瘤B16-FIO细胞转移及其机制。结果：1．不同剂量的GHGKHKNK八肽对小鼠恶性黑色素瘤细胞B16-FIO的克隆形成均有抑制作用,与对照组相比较均有显著性差异（P〈0．05）2．不同剂量的GHGKHKNK八肽在体外作用24h后可以显著抑制小鼠恶性黑色素瘤B16-FIO细胞的侵袭,穿膜细胞数与对照组比较具有显著性差异（P〈0．05）。3．GHGKHKNK八肽在24h时5．5&#215;10^-4mol／L、5．5&#215;10^-5mol／L、5．5&#215;10^-6mol／L对小鼠恶性黑色素瘤细胞B16-F10黏附抑制率与对照组相比较均有显著性差异（P〈0．05）。4．经GHGKHKNK八肽作用后,小鼠恶性黑色素瘤细胞ICAM-1、LN—R表达降低表达降低,E-cadhesion表达增强。与对照组比较明显差异P〈0．05．5．GHGKHKNK八肽对B16一F10人工肺转移的抑制作用的实验结果显示：GHGKHKNK八肽各剂量组和环磷酰胺组肺转移灶的平均数目与生理盐水组照组相比较有明显差异（P〈0．05）：GHGKHKNK八肽500ug／kg／d、50ug／kg／d剂量组与环磷酰胺组对比有显著性差异（P〈0．05）。结论：i．GHGKHKNK八肽在体外能抑制小鼠恶性黑色素瘤细胞的体外克隆形成能力,能显著抑制小鼠恶性黑色素瘤B16-F10细胞的侵袭。提示HGKHKNK八肽可能通过抑制小鼠恶性黑色素瘤细胞的侵袭和增殖而抗肿瘤细胞的转移。2．GHGKHKNK八肽抑制小鼠小鼠恶性黑色素瘤细胞B16-FIO与人工基底膜的黏附,提示GFIGKHKNK八肽可能通过抑制细胞与基底膜的黏附来抑制肿瘤细胞的转移。3．GHGKHKNK八肽能够下调细胞间黏附因子1（ICAM-1）和层黏连蛋白受体（LN—R）在细胞内的表达,提示GHGKHKNK八肽可能通过抑制细胞间黏附因子的表达而抑制肿瘤细胞的转移。4．GHGKHKNK八肽能显著抑制小鼠恶性黑色素瘤细胞B16-F10在小鼠体内的肺转移。     

一种可用于黑色素瘤靶向递药的透明质酸纳米凝胶

黑色素瘤恶性程度高,且发病率逐年上升。本研究制备了一种能特异性靶向黑色素瘤的透明质酸纳米凝胶,将巯基化的透明质酸修饰于表面功能化的普朗尼克F127-TPGS混合胶束制备共价交联的纳米凝胶。通过测定粒径考察其体外稳定性;细胞毒性实验考察该载体材料对细胞的毒性作用;细胞摄取实验定量和定性考察B16F10黑色素瘤细胞对该纳米凝胶的摄取情况。结果显示,本研究制备了一种30 nm左右的小粒径纳米凝胶,该纳米凝胶对小鼠3T3成纤维细胞与小鼠黑色素瘤B16F10细胞均无明显细胞毒性作用,与低表达CD44受体的3T3细胞相比,高表达CD44受体的B16F10细胞的摄取效率显著增加(P<0.05)。     

弓形虫溶解抗原抗小鼠B16黑色素瘤血管生成的实验研究

目的 观察弓形虫溶解抗原(TLA)对小鼠B16黑色素瘤生长以及肿瘤血管生成的影响.方法 20只C57BL/6J小鼠皮下接种B16黑色素瘤细胞,建立荷瘤动物模型,从小鼠荷瘤的第7天开始,每隔2天实验组小鼠经腹腔注射TLA 0.1 ml,对照组小鼠注射同等剂量0.9%氯化钠注射溶液,荷瘤21 d后处死小鼠剥取肿瘤,测量肿瘤体积与重量,计算抑瘤率,免疫组化法检测肿瘤微血管密度(MVD)与血管内皮生长因子(VEGF)表达情况.结果 TLA显著抑制了小鼠体内黑色素瘤生长,实验组肿瘤体积与重量明显小于对照组(P＜0.05),抑瘤率为49.6%.实验组与对照组的MVD值分别为(44.4000±4.7888)、(31.9000±2.6012),两组相比较差异有统计学意义(P＜0.05).实验组肿瘤VEGF表达明显低于对照组(P＜0.05).结论 TLA能够抑制小鼠B16黑色素瘤生长,其抗瘤机制可能与抗血管生成有关.     

PI3K/Akt通路介导HspA12B对小鼠内毒素血症所致心功能不全的保护作用

目的 探讨高表达热休克蛋白A12B(HspA12B)对内毒素血症所致心功能不全的保护作用及其可能机制.方法 HspA12B转基因小鼠和野生型小鼠均分别注射脂多糖(LPS)10 mg/kg(A1组,15只;A2组,14只)、渥曼青霉素(WM)1 mg/kg+ LPS 10 mg/kg(B1组,10只;B2组,10只)、生理盐水(C1组,8只;C2组,9只).用超声心动图测定左心室射血分数(LVEF)和短轴缩短率(FS),Western blot法检测Akt、磷酸化Akt(p-Akt)、糖原合成酶激酶3β(GSK-3β)、磷酸化GSK-3β(p-GSK-3β)蛋白表达.结果 A1、A2组p-Akt、p-GSK-3β表达分别低于C1、C2组(P＜0.01或P＜0.05);与A2组相比,A1组p-Akt、p-GSK-3β的下降程度分别减轻了54.3％、27.4％(P＜0.05).各组LVEF、FS水平由多到少为C1组＞A1组＞B1组、C2组＞A2组＞B2组(P＜0.01);A1组LVEF、FS较A2组分别提高了56.0％、72.5％ (P＜0.01).结论 高表达HspA12B改善内毒素血症心功能不全可能是通过激活PI3K/Akt信号通路介导的.     

邻苯二甲酸二乙基已酯对小鼠脂肪和葡萄糖代谢的影响

目的探讨不同剂量的邻苯二甲酸二乙基已酯(DEHP)暴露对脂肪和葡萄糖代谢的影响。方法选用C57雄性小鼠40只,随机分为对照组和3个实验组,每组10只。3个实验组分别经灌胃给予0.05、5和500 mg/kg·bw的DEHP,连续4周。期间定期记录体重和饲料消耗情况,实验结束前进行葡萄糖耐量试验。实验结束,摘眼球取血,检测血糖及血脂;分离肝、棕色脂肪、腹壁脂肪和附睾脂肪,计算脏体比;肝油红O染色检测脂肪蓄积情况。结果实验期间,各组小鼠体重均呈增长趋势,其中500 mg/kg·bw DEHP组小鼠增重明显高于对照组(P0.05);小鼠肝重量增加,肝脏系数明显高于对照组及其他2个剂量组(P0.05)。3个DEHP染毒组小鼠腹壁脂肪重量增加,脏体比分别比对照组增加50.8%、36.3%和31.5%,与对照组比较差异有统计学意义(P0.01)。其中0.05 mg/kg·bw组小鼠腹壁脂肪增加最为明显,但3个剂量组之间差异无统计学意义(P0.05);各组小鼠附睾脂肪及棕色脂肪的脏体比差异无统计学意义(P0.05)。葡萄糖耐量试验显示,500 mg/kg·bw组小鼠葡萄糖耐量受损,血糖曲线下面积明显高于对照组(P0.05)。3个DEHP染毒组小鼠血脂水平均表现为升高趋势,5和500 mg/kg·bw DEHP组小鼠血清甘油三酯(TG)明显高于对照组(P0.05);3个DEHP染毒组小鼠血清胆固醇(CHOL)、低密度脂蛋白(LDL)均明显高于对照组(P0.01),0.05和5 mg/kg·bw DEHP组小鼠血清高密度脂蛋白(HDL-C)与对照组相比,差异有统计学意义(P0.01)。肝病理组织切片的油红O染色结果显示DEHP染毒组肝脂肪蓄积,以500 mg/kg·bw组最为明显。结论一定剂量DEHP能够导致小鼠脂肪和葡萄糖代谢紊乱,增加肝和皮下脂肪蓄积。     

千根草水提物对小鼠肝损伤的保护作用

目的:研究千根草水提取物对小鼠D-半乳糖胺盐酸盐(D-GalN)致急性肝损伤的保护作用。方法:将实验小鼠随机分成6组:正常对照组,模型组,联苯双酯组(150mg/kg/d),千根草水提物低(5g/kg/d)、中(10 g/kg/d)、高剂量组(20g/kg/d),并设正常对照组。连续ig给药7d,末次灌胃1h后,正常对照组小鼠腹腔注射生理盐水,各给药组及模型组小鼠腹腔注射D-GalN(800mg/kg),造成化学性肝损伤模型,16h后称重取血取材。观测肝脏系数;测定血清谷丙转氨酶(ALT)、谷草转氨酶(AST)、碱性磷酸酶(ALP)活性和总蛋白(TP)、白蛋白(ALB)、球蛋白(GLB)、白球比(A/G)含量。结果:与模型组相比,千根草水提物各剂量组及阳性对照组均能增加小鼠体重,并能降低肝脏系数,同时能降低小鼠血清中ALT、AST、ALP水平和含量(P0.01或P0.05),提高小鼠血清中TP、ALB、GLB、A/G(P0.01或P0.05)。结论:千根草水提取物对D-GalN致急性肝损伤的小鼠有保护作用,对肝损伤的防治有良好的潜在应用价值。     

T-钙黏蛋白联合顺铂对黑色素瘤顺铂 耐药株的作用研究

摘要：目的 探讨T-钙黏蛋白联合顺铂对黑色素瘤顺铂耐药株的作用。方法 采用大剂量冲击和逐步增加剂 量相结合的方法诱导建立小鼠黑色素瘤B16F10顺铂耐药细胞株（CDDP-R B16F10）。MTT法检测CDDP-R B16F10 的增殖能力。将T-钙黏蛋白转染肿瘤细胞。分别采用反转录聚合酶链式反应（RT-PCR）和免疫组化SP法检测转染 后T-钙黏蛋白mRNA和蛋白的表达。实验将CDDP-R B16F10细胞分为空白对照组、pEGFP-N1组、pEGFP-N1-T cadherin组、顺铂组、pEGFP-N1联合顺铂组、pEGFP-N1-T-cadherin 联合顺铂组。采用Wound-healing 划痕实验和 transwell侵袭实验检测T-钙黏蛋白联合顺铂对CDDP-R B16F10细胞迁移和侵袭力的影响。结果 成功建立黑色素 瘤顺铂耐药细胞株。MTT法结果显示,CDDP-R B16F10细胞增殖能力与B16F10细胞相比差异无统计学意义（P＞ 0.05）。RT-PCR和免疫组化SP法检测表明,转染后细胞可稳定转录和表达T-钙黏蛋白。pEGFP-N1-T-cadherin联 合顺铂组细胞迁移率和穿膜细胞数低于pEGFP-N1-T-cadherin组（P＜0.05）,而pEGFP-N1-T-cadherin组低于空白 对照组、pEGFP-N1 组、顺铂组和 pEGFP-N1 联合顺铂组（P＜0.05）。析因分析显示,T-钙黏蛋白与顺铂联合对 CDDP-R B16F10细胞迁移率及侵袭力的抑制有交互作用（P＜0.05）。结论 T-钙黏蛋白可恢复顺铂对黑色素瘤顺 铂耐药细胞株迁移及侵袭力的抑制作用。     

开口箭皂苷抗黑色素瘤侵袭与转移作用研究

目的研究开口箭皂苷对B16-BL6黑色素瘤肺转移和体外肿瘤细胞穿透人工基底膜的影响。方法小鼠爪下制备黑色素瘤模型,注射不同剂量开口箭皂苷溶液,3周后称量患肢质量并计算肿瘤抑制率,5周后测定小鼠肺、脾、胸腺组织表面肿瘤节结数,Transwell小室实验测定药物对肿瘤细胞侵袭基底膜的影响。结果开口箭皂苷呈剂量依赖性地抑制小鼠黑色素瘤生长,高剂量(45 mg.kg-1)开口箭皂苷可明显减少小鼠肺转移结节数、总转移结节数和转移率(P<0.05);Transwell小室实验中,开口箭皂苷可显著抑制侵袭细胞数(P<0.05),抑制率21.46%。结论开口箭皂苷可能通过抑制黑色素瘤生长、转移及降低基底膜侵袭而发挥抗肿瘤作用。     

Ginkgo biloba exocarp extracts inhibits metastasis and its effects on TGF-β1/ERK1/2/MMP-9 signaling pathway in B16-F10 melanoma

OBJECTIVE To study the inhibition and mechanism of Ginkgo biloba exocarp extracts(GBEE)for the metastasis of B16-F10 melanoma in C57 BL/6 J mice. METHODS The metastasis model of B16-F10 in C57BL/6J mice was set up. The C57 BL/6 J mice were randomly separated into these groups: positive control,model control, normal control and GBEE treatment groups, n=10. The mice in positive group wereintraperitoneal(ip) injectioncis-dichlorodiamineplatinum(Ⅱ) at a dose of 5 mg·kg~(-1), twice a day for 7 d; model group and normal group were both intragastric gavage(ig) normal saline(NS) in a volume of 0.1 m L/10 g, once a day for17 d; the GBEE treatment groups were respectively ig GBEE 50, 100 and 200 mg · kg~(-1), once a day for 17 d.After the administration, the lung tissue was removed and the lung surface metastasis was observed; the rate of lung metastasis and anti-metastasis were calculated;the degree of lung metastasis was observed by HE staining; in vitro, the effect of GBEE on the migration rate of B16-F10 cel s was detected by wound healing test; Western Blot was used to detect the expression of TGF-β_1, ERK1/2,p-ERK1/2 and MMP-9 protein in B16-F10 cel s. RESULTS In vivo, we discovered that GBEE(50, 100, 200 mg·kg~(-1))cansuppress tumor lung metastasis of B16-F10 melanoma in C57 BL/6 J mice in a dose-dependent way. In vitro, we found that GBEE(20, 40, 80 mg·L~(-1)) can significantly inhibit B16-F10 cells treated for 24 h and 48 h migration in a time-and concentration-dependent way. GBEE(20, 40,80 mg ·L~(-1)) can suppressed TGF-β_1, p-ERK1/2/ERK1/2 and MMP-9 protein expression level in a concentrationdependent way. CONCLUSION GBEE significantly inhibit the metastasis of B16-F10 melanoma, and its mechanism of action is related to the inhibition of extracellular matrix degradation and cell migration through the TGF-β_1/ERK1/2/MMP-9 signaling pathway.     

三七总皂苷对B16黑色素瘤生长及转移的作用

目的观察三七总皂苷（PNS）对B16黑色素瘤生长及转移的作用,及其对B16黑色素瘤表达缝隙连接蛋白Connexin32的影响。方法实验采用B16黑色素瘤自发性肺转移模型,来观察PNS对B16黑色素瘤生长及转移的影响。免疫组织化学检测Connexin32在黑色素瘤原发灶的表达情况。结果（1）PNS对黑色素瘤生长有较好的抑制作用,其中PNS高剂量组抑瘤率可达50．85％。（2）与模型组相比PNS中、高剂量组能有效抑制黑色素瘤的肺转移,转移灶数量与对照组相比有明显减少。（3）免疫组织化学检测,发现PNS各用药组均能增强黑色素瘤原发灶细胞膜上Connexin32的表达。结论PNS能够抑制B16黑色素瘤的生长和转移,并能有效增强肿瘤细胞膜上Connexin32的表达。     

重组人纤连蛋白CH50对黑色素瘤生长及转移的影响

目的：研究重组人纤连蛋白ＣＨ５０对小鼠黑色素瘤生长的影响及其抗肿瘤机制。方法 进行小鼠动物实验及黑色素瘤Ｂ１６细胞实验。结果：ＣＨ５０在体内明显抑制黑色素瘤生长及实验性肺转移,ＣＨ５０在体外能附粘黑色素瘤Ｂ１６细胞,抑制Ｂ１６细胞粘附层粘蛋白并明显提高腹腔巨噬细胞对Ｂ１６细胞杀伤活性,结论：ＣＨ５０抑制小鼠黑色素瘤的生长和转移,ＣＨ５０的抗肿瘤机制与其粘附肿瘤细胞,提高巨噬细胞杀瘤性活性有关。     

Antimetastatic potential of vernolide-A, a sesquiterpenoid from Vernonia cinerea L

The inhibitory effect of vernolide-A (C(21)H(28)O(7)) on lung metastasis induced by B16F-10 melanoma cells was studied using C57BL/6 mice. Vernolide-A was administered in three different modalities such as simultaneously with tumor, prophylactic to tumor and after tumor development. Maximum inhibition in the metastasis was observed when vernolide-A was administered simultaneously with tumor. There was 89.39% inhibition of lung tumor nodule formation and 88.51% increase in the life span of metastatic tumor-bearing animals. Highly elevated levels of lung hydroxyproline, lung uronic acid, lung hexosamine, serum sialic acid, serum γ-glutamyl transpeptidase (GGT) and serum vascular endothelial growth factor (VEGF) in the metastatic control animals were found to be significantly lowered in the vernolide-A-treated animals. Histopathological analysis of lung tissues also correlated with these results. Vernolide-A administration downregulated the expression of matrix metalloproteinase-2 (MMP-2), MMP-9, extracellular-signal-regulated kinase-1 (ERK-1), ERK-2 and VEGF in the lung tissue of B16F-10 melanoma challenged animals. In the in vitro system, vernolide-A showed a significant inhibition of invasion of B16F-10 melanoma cells across the collagen matrix. Vernolide-A treatment also inhibited the migration of B16F-10 melanoma cells across a polycarbonate filter in vitro. Vernolide-A could inhibit MMP-2 and MMP-9 protein expression in gelatin zymographic analysis of B16F-10 cells. (3)H-thymidine proliferation assay showed that vernolide-A could inhibit the proliferation of B16F-10 melanoma cells in vitro. These results indicate that vernolide-A could inhibit the metastatic progression of B16F-10 melanoma cells in mice.     

海参岩藻聚糖硫酸酯抗肿瘤转移作用研究

目的建立小鼠黑色素瘤B16细胞实验性肺转移模型,探讨海参岩藻聚糖硫酸酯(sea cucumber fu-coidan,SC-FUC)的体内抑制肿瘤肺转移作用。方法连续腹腔注射SC-FUC 26d后,检测小鼠肺转移灶数量、血清中唾液酸的含量、γ-谷氨酰转肽酶活力和肺组织中羟脯氨酸、氨基己糖、糖醛酸的含量。结果SC-FUC剂量组小鼠的肺转移灶数量显著减少(P<0.01),平均转移抑制率为65.25%,血清唾液酸含量和γ-谷氨酰转肽酶活力显著降低(P<0.01),肺组织中羟脯氨酸、氨基己糖、糖醛酸的含量显著下降(P<0.01)。结论SC-FUC能显著抑制肿瘤细胞在小鼠体内的转移和生长。     

Antimetastatic activity of acteoside,a phenylethanoid glycoside

We examined the antimetastatic effect of acteoside, a phenylethanoid glycoside widely distributed in the plant kingdom, on lung metastasis using a mouse model injected with B16 melanoma cells intravenously. Male C57BL/6 mice were injected intravenously with 2 x 10(5) of B16 melanoma cells, while acteoside at a dose of 50 mg/kg was administered intraperitoneally every other day from 13 d before B16 melanoma cell injection until all mice had succumbed to the metastatic tumor burden in the lung. Administration of acteoside prolonged survival time significantly and the average survival time was 63.3 +/- 3.4d compared with 52.1 +/- 2.5d in control mice. This result suggests that acteoside showed suppressive effect on lung metastasis of B16 melanoma cells.     

Possible reduction of hepatoma formation by Smmu 7721 cells in SCID mice and metastasis formation by B16F10 melanoma cells in C57BL/6 mice by Agaricus blazei murill extract

Agaricus blazei Murill extract (ABM) has been reported to possess antitumor effects. In this study, the role of ABM in tumor growth and metastasis in vivo was evaluated in experimental Smmu 7721 hepatoma cells in severe combined immunodeficiency (SCID) mice and B16F10 melanoma cells lung metastasis in C57BL/6 mice. For the tumor growth model, the size of the liver tumor mass was about 10 mm to 20 mm in the control group. In comparison with the control group, the tumor mass seem to grow slowly with ABM treatment, especially at the high dose. For the tumor metastasis model, after a six-week treatment, the survival rates of B6 mice were 0%, 30%, 10% and 50% for control group, low, median and high concentration ABM treatment groups, respectively. The survival rate showed that pretreatment of C57BL/6 (B6) mice with ABM lengthened their lifespan after tumor cell inoculation, which supports the notion that ABM successfully reduced lung metastasis formation by B16F10 melanoma cells. The treatment effect was dependent on the concentration of ABM for tumor growth and metastasis in these models.     

表没食子儿茶素没食子酸酯通过下调GTP结合蛋白RhoA的表达抑制癌细胞的浸润和转移

目的本研究测定了表没食子儿茶素没食子酸酯((-)-Epigallocatechin-3-gallate ,EGCG)对人肺癌细胞-95-D体外浸润、转移和RhoA表达的影响及对鼠黑色素瘤细胞体内转移能力的影响.方法用"细胞迁移"和"培养小室模型"评价细胞的移动能力和浸润能力;用鼠黑色素瘤细胞肺部转移模型评价细胞体内的转移能力;用RT-PCR和Western blot方法测定RhoA的表达.结果EGCG有效抑制95-D细胞的迁移和浸润,40 μmol·L-1 EGCG对95-D细胞浸润能力的抑制为 79.9%,EGCG 50 mg·kg-1·d-1,给药3周,对黑色素瘤细胞肺部转移能力的抑制为 71.7%.RT-PCR和Western blot的实验结果表明EGCG能有效下调RhoA的表达.结论EGCG能够明显的抑制95-D细胞的浸润和转移,可能的作用机理涉及到它对RhoA表达的抑制.     

Effects of Ganoderma lucidum polysaccharides peptide on tumor metastasis in mice with sleep fragmentation

In recent years, studies have shown that there is a correlation between sleep disorders and cancer, but at the present stage, the research on sleep disorders and tumor related animal models is relatively insufficient. Our research will focus on mice bearing B16 F10-luc-G5 melanoma tumor with sleep fragmentation, detecting promoting effect of sleep fragmentation(SF) on the metastasis of melanoma. At the same time, we used Ganoderma lucidum polysaccharides peptide(GL-pp, 80 mg·kg~(-1)), a component of traditional Chinese medicine Ganoderma lucidum, which has long enjoyed a good reputation at home and abroad, to observe its anti-tumor metastasis effects on B16 F10-luc-G5 mice with SF. Then we used whole proteomics to analyze the difference proteins expressed in lung tissue and compared between groups, includes mice bearing B16 F10-luc-G5, mice bearing B16 F10-luc-G5 with SF and GL-pp administered mice bearing B16 F10-luc-G5 with SF. With the analysis using bioinformatics, we found several key proteins, their genes name are Adcy9, ptk2, Yap1 and Lpin2, Per1 and Tim. And several important clusters, they are, immune system, platelet aggression, energy metabolism, cell cytoskeleton, cell adhesion and circadian rhythms. Moreover, we detected the TLR4 signal pathway and macrophage differentiation to reconfirm the results of proteomics and trying to elucidate the mechanism of SF on tumor growth and metastasis and the effects of GL-pp.     

Antimetastatic effect of an immunomodulatory arabinomannan extracted from Mycobacterium tuberculosis strain Aoyama B,Z-100, through the production of interleukin-12

In this study, the role of interleukin (IL)-12 on the antimetastatic effect of Z-100 was investigated using wild-type C57BL/6 mice or IL-12p40 knockout (IL-12p40 KO) mice inoculated with highly metastatic B16F10 melanoma. When C57BL/6 mice were inoculated with B16F10 melanoma (2x10(5) cells/mouse i.v.), Z-100 (10 mg/kg i.p.) significantly suppressed the pulmonary metastasis of B16F10 melanoma 14 d after tumor inoculation. On the other hand, the antimetastatic effect of Z-100 was not observed in IL-12p40 KO mice inoculated with B16F10 melanoma. These results indicate that IL-12 is essentially required for the appearance of the antimetastatic effect of Z-100. Since helper T (Th) 2 cell responses have been reported to have a role in tumor metastasis, the regulatory effect of Z-100 on the immune balance of Th1/Th2 cell responses was investigated. In both C57BL/6 mice and IL-12p40 KO mice bearing B16F10 melanoma, Th1 cytokine production (IL-2, interferon-gamma) was significantly suppressed as compared with those in normal mice. On the other hand, Th2 cytokine production (IL-4, IL-10) in these mice was increased. The administration of Z-100 (10 mg/kg i.p.) in C57BL/6 mice bearing B16F10 melanoma improved the balance of Th1/Th2 cell responses from the Th2-dominant state to the normal state. However, the improvement of Th1/Th2 cell responses by Z-100 was not observed in IL-12p40 KO mice bearing the same tumors. In addition, Z-100 significantly increased IL-12 production by macrophages in a concentration-dependent manner, while Z-100 significantly decreased IL-10 production by these cells in vitro. These results suggested that up-regulation of IL-12 production and down-regulation of IL-10 production by Z-100 are related to the improvement of Th1/Th2 cell responses from the Th2-dominant state to the normal state, which resulted in suppression of tumor metastasis.