Expressions of vascular endothelial growth factor in cirrhotic tissues and their relations to proto-oncogene c-fos, c-myc

Objective: To investigate the significance of vascular endothelial growth factor (VEGF) in the pathogene- sis of liver cirrhosis and the correlation between VEGF and proto-oncogene c-fos and c-myc in cir- rhotic liver. Methods: The proteins of VEGF, c-fos, and c-myc were identified immunohistochemically in each tissue section of 53 cases of liver cirrhosis. The correlations between VEGF, c-fos and c-myc were analyzed. The levels of VEGF protein in different Child gradings were also compared. Results: The proteins of VEGF were more highly ex- pressed in Child A and B patients than in Child C patients and controls. The expressions of both c-fos and c-myc were not statistically significant between VEGF positive and negative patients. Conclusions: The protein level of VEGF can reflect the compensation status of cirrhosis patients and may act as an anti-cirrhotic factor. The proto-oncogene c- fos, c-myc and VEGF may have different mecha- nisms in the course of cirrhosis or hepatic tumorigen- esis.

Protooncogene c-fos overexpression in NADPH-d positive neurons of the amygdala in soman induced seizures in the rat

Fos immunohistochemistry and NADPH-d histochemistry and double labeling of the 2 methods were used to study therelationship between c-Fos expressed neurons and NADPH-d positive neurons of the amygdala in soman-induced seizures in the rat.It was found that protooncogene c-fos was overexpressed in the amygdala from 1.5 h to 2 d after soman-induced seizures occurred.c-fos overexpression was in the persisting and delayed pattem. The distribution of Fos immunoreactively positive neurons was sub-nuclear specific. About 10% of the Fos-positive neurons were NADPH-d positive and almost all the NADPH-d positive neuronswere also stained with Fos immunohistochemistry. Our findings together with those reported in our previous paper in which c-fosexpression and NOS activation were found to share the common upstream of the intracellular signal transducing cascade mediatedthrough NMDA receptor depended Ca2+ influx suggest that c-fos expression and nitric oxide neurotoxicity mighy exist in the amygdala lesions after soman induced seizures occurred.

骨疏康干预破骨细胞:激活核因子E2相关因子2调控c-Fos/NFATc1通路

背景:已有研究表明,骨疏康通过调节核苷酸、氨基酸代谢和免疫机制影响骨骼代谢,目前骨疏康治疗骨质疏松症的机制研究主要聚焦于调控成骨细胞,对破骨细胞的关注较少。目的:以RAW 264.7细胞为实验对象,从破骨细胞角度探讨骨疏康治疗骨质疏松症的机制。方法:取8周龄雌性SD大鼠24只,采用随机数字表法分为4组(n=6),3个实验组分别灌胃给予1,2,4 g/kg的骨疏康药液(2次/d),对照组灌胃给予等量蒸馏水(2次/d),连续灌胃7 d后抽取大鼠主动脉血,离心收集血清,同组血清合并,获得低、中、高浓度的骨疏康含药血清及正常血清,进行后续实验。①将RAW 264.7细胞分6组培养:对照组加入正常血清,低、中、高浓度组分别加入低、中、高浓度的骨疏康含药血清,Nrf2抑制剂组加入核因子E2相关因子2(nuclear factor erythroid 2-related factor 2,Nrf2)抑制剂ML385,Nrf2激活剂组加入Nrf2激活剂t-BHQ,采用CCK8法检测细胞相对活性。②将第3代RAW 264.7细胞分5组培养:空白对照组加入正常血清,破骨组加入核因子κB受体活化因子配体(receptor activator of nuclear factorκB ligand,RANKL),低、中、高浓度组在加入RANKL的基础上分别加入低、中、高浓度的骨疏康含药血清,培养5 d后进行抗酒石酸酸性磷酸染色。③将RAW 264.7细胞分5组培养:空白对照组加入正常血清,破骨组加入正常血清与RANKL,高浓度+破骨组加入RANKL+高浓度骨疏康含药血清,破骨+Nrf2激动剂组加入RANKL+t-BHQ,高浓度+破骨+Nrf2抑制剂组加入RANKL+高浓度骨疏康含药血清+ML385,培养5 d后进行Western Blot与活性氧含量检测。结果与结论:①CCK8检测结果显示,骨疏康含药血清及Nrf2抑制剂、激动剂对RAW 264.7细胞活力无明显影响;②抗酒石酸酸性磷酸染色结果显示,骨疏康含药血清呈浓度依赖性抑制破骨细胞的分化;③Western Blot与活性氧含量检测结果显示,与空白对照组比较,破骨组Nrf2蛋白表达降低(P<0.05),c-Fos、NFATc1蛋白表达与活性氧含量升高(P<0.05);与破骨组比较,高浓度+破骨组、破骨+Nrf2激动剂组、高浓度+破骨+Nrf2抑制剂组Nrf2蛋白表达升高、活性氧含量降低(P<0.05),高浓度+破骨组、破骨+Nrf2激动剂组c-Fos、NFATc1蛋白表达降低(P<0.05);与高浓度+破骨组比较,高浓度+破骨+Nrf2抑制剂组Nrf2蛋白表达降低(P<0.05),活性氧含量升高(P<0.05);④结果表明,骨疏康通过激活Nrf2减少活性氧生成,进而抑制下游c-Fos/NFATc1通路表达和破骨细胞分化。

Expressions of oncogenes c-fos and c-myc in skin lesion of cutaneous squamous cell carcinoma

Objective:To explore the expressions of c-fos and c-myc in skin lesion of cutaneous squamous cell carcinoma(CSCC).Methods:Using retrospective analysis.73 cases of CSCC were selected from Department of Dermatology,the Second Affiliated Hospital of Xi'an Jiaotong University.which were removed between January 2000 and January 2012.It was considered as experimental group.Meanwhile.11 cases of normal skin specimens of non tumor patients were selected as control group.The expression level of c-fos and c-myc was compared in the two groups.Results:The expressions of c-fos[72.60%(53/73)]and c-myc[83.56%(61/73)]in experimental group were statistically significant(P≤0.05)compared with control group(0%).Expression of c-myc protein was negatively related to differentiation of CSCC.The difference was statistically significant(X^2=7.26.P=0.001<0.05).While expression of c-fos protein was positively related to differentiation of CSCC.which was statistically significant(X^2=7.47,P=0.0012<0.025).Conclusions:The expression level of c-fos and c-myc can be used as an importan indicator of CSCC differentiation,and it has closely connection with the differentiated degree,which can guide clinical prognosis.

Expression and distribution of c-fos oncogene within central nervous system of the rat following halothane anesthesia

Objective: To study the distribution of c fos oncogene expression within central nervous system (CNS) of the rat during halothane anesthesia. Methods: c-fos oncogene immunohistochemical technique (ABC method) was employed. Results: When halothane concentration was 0.75%,1.5%or2.0%, most of the Fos-like immunore- active neurons (FLNs) appeared in telencephalon, diencephalon and brain stem, including cerebral cortex, amygaloid nucleus, accumbens nucleus, lateral keptal nucleus. bed nucleus of the stria terminalis, field CA1 of Ammon’s horn, islands of Calleja, paraventricular thalamic nucleus, central medial thalamic nucleus, reuniens thalamic nucleus, rhomboid thalamic nucleus. ventral posterolateral thalamic nucleus, paraventricular hypothalamic nucleus(ventral part). periventricular hypothalamic nucleus, median preoptic nucleus, supraoptic nucleus, suprachiasmatic nucleus. medial and lateral habenular nucleus. midbrain periaqueductal gray and Edinger-Westphal nucleus.In the present stude. we have also found that the number of FLN registered stable increase along with the increaseof the concentration of halothane. Conclusion: It has been indicated that FLNs participate in the process ofhalothane anesthesia. which should necessitate and pave the way for a further study of the patterns of linkage andthe mechanism of interaction between functional nuclei.

Preconditioning effects on expression of proto-oncogenes c-fos and c-jun after hepatic ischemia/reperfusion in rats

BACKGROUND: Ischemia/reperfusion is the main cause of hepatic damage in liver transplantation. Immediate early genes (IEGs) encode proteins can regulate expression of cellular response genes after injury, and is associated with tissue repair and cell apoptosis. The purpose of this re- search was to investigate the effects of preconditioning on expression of immediate early genes c-fos and c-jun follow- ing hepatic ischemia/reperfusion (IR) and its roles in cellu- lar regeneration and apoptosis. METHODS: Ninety-six Wistar rats were randomly divided into IR group and hepatic ischemic preconditioning (IPC) group, and each group was further divided into eight sub- groups (n =6). The model of partial liver ischemia/reper- fusion was used. The rats were subjected to 60-minute liver ischemia, preceded by 10-minute preconditioning. After 0-, 0.5-, 1-, 2-, 4-, 8-, 12-, 24-hour reperfusion, the se- rum and liver tissue in each group were collected to detect the level of serum ALT/AST, liver histopathology, expres- sion of c-fos, and c-jun mRNA. Flow cytometer was used to detect Ki67 and Sub-G1 as the quantity indicators of cell regeneration and apoptosis respectively. RESULTS: Compared with IR group, IPC group showed a significantly lower ALT/AST level in 0. 5-hour sub-group to 8-hour sub-group (P<0.05). Ki67 elevated significantly at 0.5, 1, 2 hours, but decreased significantly at 24 hours ( P < 0 . 05). Ap index decreased significantly after 1-hour reperfusion(P<0.05). Expressions of c-fos and c-jun mR- NA were low, especially c-jun at 0.5, 1 and 2 hours after reperfusion. CONCLUSION: Ischemic preconditioning can protect liver cells against ischemia/reperfusion injury, and this protec- tive effect may be related to influence transcription levels of c-fos and c-jun.

Studies on Hepatocyte Apoptosis, Proliferation and Oncogene c-fos Expression in Carbon Tetrachloride-induced Cirrhotic Rat Liver

Summary: To investigate the significance of hepatocyte apoptosis, proliferation and oncogene c fos expression in carbon tetrachloride (CCl 4) induced cirrhotic rat liver. Rat cirrhosis was induced by subcutaneous injection of 50 % (v∶v 1∶1) CCl 4. Hepatocyte apoptosis, proliferation and oncogene c fos expression were examined with TUNEL, PCNA and c fos immunohistochemical methods in control group and treatment group 72 h, 5, 7, 11 and 15 weeks after CCl 4 induction. Hepatocyte apoptosis was rarely seen in control rat liver. The hepatocyte apoptosis was obviously increased 72 h after treatment. Fifteen weeks after treatment, the apoptosis was still more obvious in treatment group than that in controls. PCNA was constantly expressed in CCl 4 group, with highest level at middle phase. C fos was positive 7 and 11 weeks after CCl 4 treatment. The results suggest that: 1) apoptosis is involved in rat liver damage at the early phase in CCl 4 induced injury, and the process can alleviate nodule reconstruction or eradicate potentially mutational hepatocytes at the later phase; 2) hepatocytes constantly proliferate in CCl 4 induced rat liver cirrhosis, especially at the middle phase; 3) c fos might modulate hepatocyte proliferation in CCl 4 induced rat liver cirrhosis.

四神丸对腹泻型肠易激综合征大鼠结肠MCT、c-fos表达的影响

目的观察四神丸对腹泻型肠易激综合征(IBS-D)模型大鼠结肠MCT、c-fos表达的影响。方法将40只大鼠随机分为正常组、模型组、匹维溴铵组(15.23 mg/kg)和四神丸组(7.32 mg/kg),每组10只,采用番泻叶灌胃联合避水应激法造模,灌胃给药14 d后,观察一般状态,测定体质量、粪便含水量和AWR评分,ELISA法检测血清MCT、c-fos水平,免疫组织化学法、Western blot法分别检测结肠组织MCT、c-fos蛋白定位及表达,RT-qPCR法检测结肠组织MCT、c-fos mRNA表达。结果与模型组比较,四神丸组和匹维溴铵组大鼠一般状态明显好转,体质量升高(P<0.01),粪便含水量、AWR评分以及血清中MCT、c-fos水平均降低(P<0.05,P<0.01),结肠组织MCT、c-fos蛋白及mRNA表达均降低(P<0.05,P<0.01);四神丸组结肠组织MCT蛋白表达及c-fos蛋白表达均低于匹维溴铵组(P<0.05)。结论四神丸对IBS-D大鼠内脏敏感的保护机制可能与调节结肠肥大细胞活化指标MCT、c-fos的表达有关。

艾灸对创伤后应激障碍小鼠行为学及下丘脑外侧区c-fos的影响及c-fos与行为学的相关性分析

目的观察艾灸“内关”“阳陵泉”对创伤后应激障碍(post traumatic stress disorder,PTSD)小鼠行为及小鼠下丘脑外侧区c-fos表达的影响。方法将C57小鼠随机分为正常组、模型组、艾灸组,每组6只。模型组、艾灸组采用改良的单次长时间应激和电刺激(single prolonged stress and electrical stimulation,SPS&S)方法复制PTSD模型。艾灸组予艾灸“内关”“阳陵泉”连续干预7 d。利用旷场实验、高架十字迷宫实验和条件性恐惧测试实验检测小鼠行为,采用免疫荧光检测小鼠下丘脑外侧区c-fos的表达水平。结果与正常组比较,模型组小鼠体质量,旷场实验中央场时间、中央场距离显著减少(P<0.05),高架十字迷宫实验开臂进入次数和时间均显著减少(P<0.05);条件性恐惧测试实验中,背景恐惧和声音恐惧的冻结时间均显著增加(P<0.05);小鼠下丘脑外侧区c-fos表达水平显著升高(P<0.05)。与模型组比较,艾灸组小鼠体质量,旷场实验中央场时间、中央场距离显著增加(P<0.05),高架十字迷宫实验开臂进入次数和时间均显著增加(P<0.05);条件性恐惧测试实验中,背景恐惧和声音恐惧的冻结时间均显著减少(P<0.05);小鼠下丘脑外侧区c-fos表达水平显著降低(P<0.05)。结论艾灸“内关”“阳陵泉”穴能够显著改善PTSD小鼠焦虑抑郁样行为,其机制可能与调节下丘脑外侧区的c-fos表达有关。

Tanshinone ⅡA improves Alzheimer’s disease via RNA nuclearenriched abundant transcript 1/microRNA-291a-3p/member RAS oncogene family Rab22a axis

BACKGROUND Alzheimer’s disease(AD)is a neurodegenerative condition characterized by oxidative stress and neuroinflammation.Tanshinone ⅡA(Tan-ⅡA),a bioactive compound isolated from Salvia miltiorrhiza plants,has shown potential neuroprotective effects;however,the mechanisms underlying such a function remain unclear.AIM To investigate potential Tan-ⅡA neuroprotective effects in AD and to elucidate their underlying mechanisms.METHODS Hematoxylin and eosin staining was utilized to analyze structural brain tissue morphology.To assess changes in oxidative stress and neuroinflammation,we performed enzyme-linked immunosorbent assay and western blotting.Additionally,the effect of Tan-ⅡA on AD cell models was evaluated in vitro using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay.Genetic changes related to the long non-coding RNA(lncRNA)nuclear-enriched abundant transcript 1(NEAT1)/microRNA(miRNA,miR)-291a-3p/member RAS oncogene family Rab22a axis were assessed through reverse transcription quantitative polymerase chain reaction.RESULTS In vivo,Tan-ⅡA treatment improved neuronal morphology and attenuated oxidative stress and neuroinflammation in the brain tissue of AD mice.In vitro experiments showed that Tan-ⅡA dose-dependently ameliorated the amyloid-beta 1-42-induced reduction of neural stem cell viability,apoptosis,oxidative stress,and neuroinflammation.In this process,the lncRNA NEAT1-a potential therapeutic target-is highly expressed in AD mice and downregulated via Tan-ⅡA treatment.Mechanistically,NEAT1 promotes the transcription and translation of Rab22a via miR-291a-3p,which activates nuclear factor kappa-B(NF-κB)signaling,leading to activation of the pro-apoptotic B-cell lymphoma 2-associated X protein and inhibition of the anti-apoptotic B-cell lymphoma 2 protein,which exacerbates AD.Tan-ⅡA intervention effectively blocked this process by inhibiting the NEAT1/miR-291a-3p/Rab22a axis and NF-κB signaling.CONCLUSION This study demonstrates that Tan-ⅡA exerts neuroprotective effects in AD by modulating the NEAT1/miR-291a-3p/Rab22a/NF-κB signaling pathway,serving as a foundation for the development of innovative approaches for AD therapy.

电针心经穴位对急性心肌缺血模型大鼠内侧隔核白细胞介素-2、JunB蛋白及c-fos表达水平的影响

目的观察电针心经对急性心肌缺血(acute myocardial ischemia,AMI)大鼠内侧隔核白细胞介素(interleukin,IL)-2水平、JunB蛋白及c-fos表达水平的影响,探究内侧隔核在针刺抗AMI中的作用及机制。方法将大鼠分为伪手术组、模型组和电针组,每组6只;结扎冠状动脉左前降支复制AMI大鼠模型;电针组大鼠选取手少阴心经“神门—通里”段进行干预,每次30 min,每日1次,连续电针3 d,刺激电流为1 mA,频率为2 Hz;伪手术组、模型组大鼠不进行电针干预。采用ELISA法检测大鼠大脑内侧隔核IL-2水平,Western blot法检测大鼠大脑内侧隔核区JunB蛋白表达水平,免疫荧光法检测大鼠大脑内侧隔核区c-fos免疫反应阳性神经元表达水平。结果与伪手术组比较,模型组大鼠大脑内侧隔核区IL-2、JunB蛋白水平显著升高(P<0.05),c-fos免疫反应阳性神经元数和平均吸光度(optical density,OD)值显著增加(P<0.05);与模型组比较,电针组大鼠大脑内侧隔核区IL-2、JunB蛋白水平显著降低(P<0.05),c-fos免疫反应阳性神经元数和平均OD值显著减少(P<0.05)。结论内侧隔核参与电针心经抗AMI的作用,其机制可能与电针降低大脑内侧隔核区IL-2、JunB蛋白及c-fos表达水平有关。

The role of tazarotene-induced gene 1 in carcinogenesis:is it a tumor suppressor gene or an oncogene?

Tazarotene-induced gene 1(TIG1)is induced by a derivative of vitamin A and is known to regulate many important biological processes and control the development of cancer.TIG1 is widely expressed in various tissues;yet in many cancer tissues,it is not expressed because of the methylation of its promoter.Additionally,the expression of TIG1 in cancer cells inhibits their growth and invasion,suggesting that TIG1 acts as a tumor suppressor gene.However,in some cancers,poor prognosis is associated with TIG1 expression,indicating its protumor growth characteristics,especially in promoting the invasion of inflammatory breast cancer cells.This review comprehensively summarizes the roles of the TIG1 gene in cancer development and details the mechanisms through which TIG1 regulates cancer development,with the aim of understanding its various roles in cancer development.

老年心肌梗死患者外周血单个核细胞中c-fos c-myc表达及临床意义

目的分析老年心肌梗死(MI)患者外周血单个核细胞中c-fos与c-myc表达,并探讨二者与老年MI的关系。方法将78例老年MI患者设为研究1组,73例稳定型心绞痛患者设为研究2组,同期纳入74名健康体检志愿者作为对照组。采用实时荧光定量聚合酶链反应检测三组被试者外周血单个核细胞中c-fos、c-myc水平。采用Pearson法分析c-fos、c-myc与血糖、高密度脂蛋白、三酰甘油的相关性,采用Logistic回归分析探讨MI预后的影响因素。结果研究1组被试者血糖水平高于对照组,三酰甘油水平及c-fos、c-myc水平高于研究2组和对照组,高密度脂蛋白水平低于研究2组和对照组;研究2组被试者高密度脂蛋白水平低于对照组,c-fos、c-myc水平高于对照组(P<0.05)。MI患者外周血单个核细胞中c-fos、c-myc水平与血糖、三酰甘油水平均呈正相关(P<0.01),与高密度脂蛋白呈负相关(P<0.01)。预后不良组患者c-fos、c-myc水平、三酰甘油水平高于预后良好组(P<0.01)。Logistic回归分析结果显示,c-fos、c-myc是影响MI患者预后不良的危险因素(P<0.01)。结论老年MI患者外周血单个核细胞中c-fos、c-myc呈高表达,二者与MI病情发展密切相关,c-fos、c-myc对预测老年MI不良预后具有一定的作用。

Concomitant epidermal growth factor receptor mutation/c-ros oncogene 1 rearrangement in non-small cell lung cancer: A case report

BACKGROUND Epidermal growth factor receptor(EGFR)mutation and c-ros oncogene 1(ROS1)rearrangement are key genetic alterations and predictive tumor markers for non-small cell lung cancer(NSCLC)and are typically considered to be mutually exc-lusive.EGFR/ROS1 co-mutation is a rare event,and the standard treatment appr-oach for such cases is still equivocal.CASE SUMMARY Herein,we report the case of a 64-year-old woman diagnosed with lung adenocar-cinoma,with concomitant EGFR L858R mutation and ROS1 rearrangement.The patient received two cycles of chemotherapy after surgery,but the disease prog-ressed.Following 1-month treatment with gefitinib,the disease progressed again.However,after switching to crizotinib,the lesion became stable.Currently,crizotinib has been administered for over 53 months with a remarkable treatment effect.CONCLUSION The efficacy of EGFR tyrosine kinase inhibitors and crizotinib was vastly different in this NSCLC patient with EGFR/ROS1 co-mutation.This report will aid future treatment of such patients.

推拿对坐骨神经慢性压迫损伤大鼠脊髓背角小胶质细胞P2Y12/RhoA/ROCK2通路及c-Fos蛋白表达的影响

目的观察推拿对坐骨神经慢性压迫损伤大鼠脊髓背角小胶质细胞P2Y12/RhoA/ROCK2通路及c-Fos蛋白表达的影响,探讨推拿治疗腰椎间盘突出症的作用机制。方法采用右侧坐骨神经慢性压迫损伤模拟腰椎间盘突出症神经性疼痛。将24只雄性SD大鼠随机分为空白组、模型组和推拿组,每组8只。造模后第4日,推拿组以按揉法干预,连续14 d。测量造模前及造模后第4、10、17 d大鼠机械缩足阈值(PWT)、热痛阈值(PWL),免疫荧光染色检测大鼠右侧脊髓背角Iba1、P2Y12蛋白表达,Western blot检测右侧脊髓背角RhoA、ROCK2蛋白表达,免疫组化检染色测右侧脊髓背角c-Fos阳性细胞数量。结果与空白组比较,模型组大鼠造模后第4、10、17日PWT、PWL明显降低(P<0.001),右侧脊髓背角Iba1、P2Y12、RhoA、ROCK2蛋白表达明显升高(P<0.001,P<0.05),c-Fos阳性细胞数明显增加(P<0.001);与模型组比较,推拿组大鼠造模后第10、17日PWT、PWL明显升高(P<0.05,P<0.01,P<0.001),右侧脊髓背角Iba1、P2Y12、RhoA、ROCK2蛋白表达明显降低(P<0.001,P<0.01,P<0.05),c-Fos阳性细胞数明显减少(P<0.001)。结论推拿可能通过调控脊髓背角P2Y12/RhoA/ROCK2通路及c-Fos表达抑制小胶质细胞激活,降低神经元兴奋性,对腰椎间盘突出症发挥镇痛作用。

红景天甙对缺氧状态下兔肺动脉平滑肌细胞增殖和c-fos、c-myc原癌基因表达的影响

目的：研究红景天甙（ｓａｌｉｄｒｏｓｉｄｅ，Ｓａｌ）对缺氧（２％～３％）状态下兔肺动脉平滑肌细胞（ＰＡＳＭＣ）增殖、ＤＮＡ合成、细胞周期和ｃ－ｆｏｓ，ｃ－ｍｙｃ原癌基因表达的影响。方法：应用细胞培养、四唑盐比色试验（ＭＴＴ）、［３Ｈ］－胸腺嘧啶核苷（［３Ｈ］－ＴｄＲ）掺入、细胞周期测定和斑点杂交的方法。结果：发现缺氧２４ｈ可直接刺激ＰＡＳＭＣ，使ＭＴＴ之ＯＤ值增加９５％（Ｐ＜００５），［３Ｈ］－ＴｄＲ的掺入量增加１４０％（Ｐ＜０．０１）；在缺氧的ＰＡＳＭＣ培养液中加入Ｓａｌ（１２００μｇ／ｍＬ）可抑制缺氧的这种促增殖作用，ＰＡＳＭＣ的ＭＴＴ之ＯＤ值与［３Ｈ］－ＴｄＲ掺入量与缺氧组相比显著下降（Ｐ＜０．０５）；流式细胞分析显示缺氧２４ｈＰＡＳＭＣＧ２／Ｍ期细胞比例比常氧组明显增多（Ｐ＜０．０１），Ｇ０／Ｇ１期细胞比例明显减少（Ｐ＜０．０５），与缺氧组相比Ｓａｌ可增多ＰＡＳＭＣＧ０／Ｇ１期细胞比例，减少Ｇ２／Ｍ期细胞比例（Ｐ＜０．０５）；缺氧可促进ｃ－ｆｏｓ，ｃ－ｍｙｃ原癌基因表达，该效应可被Ｓａｌ所抑制。结论：红景天甙可抑制缺氧所致的ＰＡＳＭＣ增殖、ＤＮＡ合成、进入Ｇ２／Ｍ期的细胞比例和ｃ－ｆｏｓ，ｃ－ｍｙ?

氟烷和氟醚类麻醉剂诱导c-fos基因在间脑部分核团的表达

本研究旨在了解氟烷和氟醚类吸入麻醉剂在间脑的作用部位．大鼠分别吸入２％甲氧氟烷，氟烷，安氟醚和异氟醚麻醉１ｈ，应用免疫组织化学法，光镜观察Ｆｏｓ蛋白阳性神经元在间脑的分布并计数．研究提示在吸入麻醉过程中间脑有１５个神经核团呈现Ｆｏｓ阳性，分别是丘脑室旁核，丘脑中央中核，丘脑再连合核，菱形丘脑核，背外侧膝状核，背内侧梨状核，丘脑背外侧核，丘脑后外侧核，下丘脑室周核，视前中核，视上核，弓状核，视交叉上核，丘脑腹后外侧核和缰核．结果表明吸入氟烷和氟醚类麻醉剂在间脑具有明确的作用位点。

癌基因c-fos和c-jun在肝细胞型肝癌中的表达及临床意义

目的 :研究癌基因 c- fos和 c- jun在肝细胞型肝癌中的表达及临床意义。方法 :采用免疫组化技术检测 1 0例正常肝组织、2 3例癌旁异型增生肝组织和 31例肝细胞型肝癌组织的癌基因 c- fos和 c- jun表达 ,并对两者相关性进行分析。结果 :在正常组织中 c- fos和 c- jun弱表达或不表达 ;在癌旁异型增生肝组织中 c- fos和 c- jun的阳性例数分别为 1 5 ( 65 .2 % )和 1 4( 60 .9% ) ,染色强度与正常肝组织相比差异有显著性 ( P<0 .0 5 ) ;在肝细胞型肝癌中 c- fos和 c- jun阳性例数分别为1 7( 5 4 .8% )和 1 6( 5 1 .9% )。c- fos和 c- jun表达水平与癌组织分化程度有关 ( P<0 .0 5 ) ,而且二种癌基因在肝细胞型肝癌中表达的协同性较强。结论 :c- fos和 c- jun癌基因的异常表达可能在肝细胞型肝癌的发生发展中起重要作用 ;c- fos和 c- jun表达水平与肝细胞型肝癌的分化程度有关 。

中药复方补剂和清剂对运动大鼠肾上腺c-fos蛋白表达的影响

目的 :了解补剂和清剂对运动大鼠肾上腺c-fos蛋白表达的影响。方法 :SD大鼠饲养、中药灌胃及运动训练 30天 ,第 31天进行规定时间游泳运动 ,取出半数大鼠予即刻处死、取出肾上腺及制片 (免疫组化法 ) ,剩余半数大鼠于休息 2 4小时后再予同法处死、取材及制片。结果 :游泳运动后即刻处死的三组大鼠间肾上腺c -fos蛋白表达量无明显差异 ,而游泳运动休息 2 4小时后清剂组较对照组的肾上腺c -fos蛋白的表达量明显降低。结论 :在对抗体力性疲劳的效应中 ,清剂有较好的对抗肾上腺伤害性刺激因素的作用。

电针“内关"对急性心肌缺血大鼠心肌c-fos基因表达的影响

目的:探讨电针“内关”改善急性心肌缺血的机制。方法:将96只大鼠随机分为假手术组、心肌缺血模型组、心肌缺血模型加电针组,采用结扎冠状动脉左前降支建立急性心肌缺血实验模型,造模成功后,电针双侧“内关”。用生化方法检测血清心肌酶活性,逆转录聚合酶链反应(RT-PCR)方法检测心肌中c-fos基因的表达。结果:心肌缺血模型组血清心肌酶活性和心肌c-fosmR—NA表达显著高于假手术组(P<0.05),电针后降低,差异有显著性意义(P<0.05)。结论:电针“内关”改善急性心肌缺血的机制与下调心肌组织c—fosmRNA的表达有关。