Foxo3a和p27kip1在大鼠坐骨神经损伤后背根神经节中的表达

Objective To investigate the expression of Foxo3a and p27kip1 in lumbar dorsal root ganglia (DRG) after injury of sciatic nerve in rats. Methods Adult rats were randomly divided into control group and experimental group. The rats in experimental group were subjected to sciatic nerve clamp.Expression and distribution of Foxo3a and p27kip1 and cellular proliferation and axon regeneration in DRG was detected by western blot and immunohistochemistry. Results Foxo3a protein levels begined to reduce at 1 day (7.0 ± 3.5), reached valley at 2 day (6.0 ± 3.8) after injury, and following Foxo3a downregulation, p27kip1 protein levels begined to decrease at 2 day (29.0 ± 3.5), reached valley at 7 day (21.0± 3.0) after injury. Down-regulation of Foxo3a and p27kip1 was expressed predominantly in neurons and glial cells by double immunolabelling. Foxo3a and p27kip1 were expressed in neurons [(37.8 ± 5.7)%, (43.3 ±4.3)%] and glial [(22.4 ± 3.9)%, (13.8 ± 3.2)%] cells in sections of DRG at 2 day after injury less than neurons [(73.6 ± 2.5)%, (84.1 ± 3.7)%] and glial [(61.3 ± 4.4)%, (68.7 ± 5.6)%] cells in sections of normal DRG. Proliferating cell nuclear antigen (PCNA) and GAP-43 were up-regulation from 2 day, and PCNA reached peak at 7 day after injury.The glial cells were the main type of cellular proliferation.Conclusion Down-regulation of Foxo3a and p27kip1 in lumbar DRG is correlated with the proliferation of glial cells and axonal regeneration after sciatic nerve injury.     

Increased phosphorylation of cyclic AMP response element binding protein （CREB） in the dorsal root ganglia and superficial dorsal horn neurons following chronic constriction injury

Objective To investigate whether chronic constriction injury （CCI） of the sciatic nerve of rats could produce alterations in the phosphorylation of cyclic AMP response element binding（CREB） protein in dorsal root ganglia （DRG） and superficial dorsal horn neurons of the spinal cord. Methods Chronic constriction injury （CCI） of the sciatic nerve was employed as a model of neuropathic pain. Thirty-two Sprague-Dawley rats were randomly divided into NaYve, Sham, CCI 2w（received CCI for 2 weeks） and CCI 4w（received CCI for 4 weeks） groups. Hind paw withdrawal threshold to mechanical stimuli and withdrawal latency to thermal stimuli were used to detemline the mechanical and thermal hypemlgesia. Then all the rats were deeply anesthetized and perfused intracardiaUy with paraformaldehyde. The fixed I4-5 spinal cord and the L5 DRG ipsilateml to CCI were harvested for fixation. The pCREB-immunoreactive（pCREB-IR） cells in both DRG and superficial dorsal horn neurons were quantified for analysis using immunohistochemistry methods. Results On the 14th day after sciatic nerve injury, all the rats exhibited significant mechanical and thermal hyperalgesia. The mechanical withdrawal thresholds to yon Frey filament from CCI 2w group decreased significantly compared to both baseline values and those of Sham group（ P 〈 0.01 ） ; Thermal withdwal latencies from CCI 2w group decreased significantly compared to both baseline values and those of Sham group（ P 〈 0.01 ）. Some rats from Sham group also showed mechanical hyperalgesia compared to both baseline values and those of Naive group（ P 〈 0.01）. 28 days after CCI, both mechanical and thermal hypersensitivity were significantly alleviated, with no statistical significance compared to those of Sham group. On the 14th day after CCI, the number of pCREB-IR ceils significantly increased in ipsilateral L5 DRGs and superficial dorsal horns（ P 〈 0.01 ） compared to Sham group. The number of phosphorylated CREB-IR cells in the ipsilateral DRGs from Sham group also increased compared to that of Naive rats（ P 〈 0.05）. There were no significant statistical differences of numbers of CREB-IR neuron between Sham group and CCI 4w group. Conclusion CCI increases CREB phosphorylatian both in DRG and superficial dorsal horn neurons of the lumbar spinal cord, and may be one of the key molecular mechanisms of central and peripheral sensitization following peripheral nerve injury.     

活体小鼠坐骨神经的形态学观察

Objective To observe the ultrastructure of sciatic nerve of GFP transgenic mice under normal and damaged conditions as well as to explore the applications of laser scanning confocal micoscope for in vivo and real time observation of peripheral nerve morphology. Methods The GFP mice were anesthetized and the sciatic nerve was exposed.The mouse was then mounted on the platform of a laser scanning confocal microscope in a way that the nerve was in direct contact with the slide for real time morphological observation in vivo.The diameters of the nerve trunk,nerve fascicles and nerve fibers were measured and the number and morphology of nerve fascicles and nerve fibers were reconted.Then the sciatic nerve was subjected to crush or transection to create a nertve iniury model.Morphological changes of the nerve proximal to,at and distal to the injury site were observed immediately after the injury and 2 hours later by laser scanning confoeal microscope in vivo. Results The diameter of normal sciatic nerve trunk of mice was about 800 μm,the diameter of nerve fascicle and nerve fiber Were 70 to 100 μm and 7.5 μm respectivdy.Each normal sciatic nerve trunk contained about 2 tiscicles and 70 to 200 nerve fibers.Immediately after and 2 hours after nerve injury vaeuolization was seen at the nerve proximal to the injury site.The nerve fibers were:disoriented and disconnection of the fibers was also seen.Nerve fibers of the nerve at the injury site were distorted,with vacuolization and breaking down of the fibers.Nenve continuity was lost.At the nerve 250 μm and 500 μm distal to the injury site,the nerve fiber fluoescence intensity gradually increased and the nerve fiber structure restored gradually.Orientation of the fibers tended to be organized. Conclusion The use of GFP transgenic mice and laser scanning confocal microscope provides a technical platform for in vivo real time observation of peripheral nerves.It can be applied to observe the morphological features and changes of mouse peripheral nerves.     

Schwann cell apoptosis in Wallerian-degenerated sciatic nerve of the rat

Objective: To investigate systematically Schwann cell apoptosis in Wallerian-degenerated sciatic nerve of the rat, and evaluate its time-related feature. Methods: Ninety-five SD rats were divided randomly into one normal group (8 rats) and 11 experimental groups (66 rats, 6 in each). Both hind legs of each rat in experimental groups were randomly divided into test leg (sciatic nerve transected ) and control one (nerve uninjured). All test legs constituted a test group and all control legs constituted a control one. After operation, all rats were respectivdy sacrificed at 1 h, 6 h, 12 h, 24 h, 2 d, 3 d, 4 d, 8 d, 14 d, 21 d, and 30 d. We analyzed the specimens of mid-distal sciatic nerve, especially the morphological changes of the nerve, the different expression levels of S-100 protein and apoptosis-related proteins such as Bel-2, Bax, and Fas in Schwann cells. The TUNEL method was used to detect the apoptotic rate of Schwann cells. Results： (1) The test group showed Wallerian degeneration. The number of Schwann cells began to decrease at 24 h, obviously decreased on day 3 and 4, then began to increase from day 8 and formed Bungner belt after 14 days. (2) Schwann cells generally expressed S-100 at a low level in all groups. The control group was not significantly different from the normal group. The test group had statistical significance at 1 h and day 21. (3) As an inhibitory gene protein of Schwann cell apoptosis, Bcl-2 positive rates in the control and test groups apparently elevated and were statistically different from the normal group. (4) As a promotive gene protein of Schwann cell apoptosis, the control and test groups expressed Bax at a high level and were statistically different from the normal group. (5) As a promotive gene protein of Schwann cell apoptosis, Fas positive rate in control group was slightly elevated, but had no statistical significance compared with the normal group. Fas positive rate in test group continuously elevated in a fluctuant way, with highly statistical significance compared with the normal group. (6) TUNEL detection further proved that Schwann cell apoptosis rarely existed in the normal group, and the left sciatic nerve had no statistical significance compared with the right sciatic nerve. While the test group showed lots of apoptotic nuclei at 6 h, 2 d, 4 d, and 21 d. It had highly statistical significance compared with the normal group. Conclusions: Schwann cell apoptosis does exist in Wallerian-degenerated sciatic nerve of the rat after transection. Schwann cell apoptosis and its apoptotic genes expression have a time-related feature.     

促红细胞生成素促进坐骨神经再生的实验研究

Objective To investigate the effect of recombinant human erythropoietin(rh-EPO) on the nerve regeneration of adult rats sciatic nerves. Methods Tirty-six healthy male Wistar rats were involved and left sciatic nerve repaired model was used.The experimental rats were divided randomly into two groups:the EPO group and the control group,18 rats in each group.rh-EPO 3 000 U/kg was injected daily into the abdominal in EPO group,and normal saline was injected into the abdominal every day after operation in control group.On 4 and 8 weeks after operation,these items were determined,the sciatic function index (SFI),biomechanics examination,histological observation,electrophysiological examination,myelinated fibers density and sectional area measurement.Results On weeks 4 after operation,the SFI of EPO group and control group were-65.26 ± 3.42 and-70.83 ± 4.12,respectively,the maximum tensile resistance were (3.86 ± 0.29)N/mm2 and (3.38 ± 0.21 )N/mm2,the delayed ratio of latency of motor nerve were 2.34 ± 0.23 and 2.78 ± 0.29,and the recovery ratio of wave amplitude were 0.23 ± 0.05 and 0.14 ± 0.03 respectively.On eight weeks after operation,the SFI of EPO group and control group were-51.34 ± 2.98 and-57.23 ± 4.86,respcetively,the maximum tensile resistance were (4.67 ± 0.36) N/mm2 and (4.13 ± 0.32) N/mm2,the delayed ratio of latency of motor nerve were 1.32 ± 0.15 and 1.62 ± 0.21,the recovery ratio of wave amplitude were 0.41 ± 0.09 and 0.26 ± 0.07,the nerve fibers cross ratio were 0.57 ± 0.05 and 0.38 ± 0.03,and the recovery ratio of sectional area of myelinated fibers were 0.81 ± 0.06 and 0.58 ± 0.03,respectively.Those items in EPO group were significantly superior to those in the control group (P ＜ 0.05 ＝.Conclusion rh-EPO can promote the injured nerve regeneration and improve the recovery of their function.     

促红细胞生成素促进坐骨神经再生的实验研究

Objective To investigate the effect of recombinant human erythropoietin(rh-EPO) on the nerve regeneration of adult rats sciatic nerves. Methods Tirty-six healthy male Wistar rats were involved and left sciatic nerve repaired model was used.The experimental rats were divided randomly into two groups:the EPO group and the control group,18 rats in each group.rh-EPO 3 000 U/kg was injected daily into the abdominal in EPO group,and normal saline was injected into the abdominal every day after operation in control group.On 4 and 8 weeks after operation,these items were determined,the sciatic function index (SFI),biomechanics examination,histological observation,electrophysiological examination,myelinated fibers density and sectional area measurement.Results On weeks 4 after operation,the SFI of EPO group and control group were-65.26 ± 3.42 and-70.83 ± 4.12,respectively,the maximum tensile resistance were (3.86 ± 0.29)N/mm2 and (3.38 ± 0.21 )N/mm2,the delayed ratio of latency of motor nerve were 2.34 ± 0.23 and 2.78 ± 0.29,and the recovery ratio of wave amplitude were 0.23 ± 0.05 and 0.14 ± 0.03 respectively.On eight weeks after operation,the SFI of EPO group and control group were-51.34 ± 2.98 and-57.23 ± 4.86,respcetively,the maximum tensile resistance were (4.67 ± 0.36) N/mm2 and (4.13 ± 0.32) N/mm2,the delayed ratio of latency of motor nerve were 1.32 ± 0.15 and 1.62 ± 0.21,the recovery ratio of wave amplitude were 0.41 ± 0.09 and 0.26 ± 0.07,the nerve fibers cross ratio were 0.57 ± 0.05 and 0.38 ± 0.03,and the recovery ratio of sectional area of myelinated fibers were 0.81 ± 0.06 and 0.58 ± 0.03,respectively.Those items in EPO group were significantly superior to those in the control group (P ＜ 0.05 ＝.Conclusion rh-EPO can promote the injured nerve regeneration and improve the recovery of their function.     

dentification of differentially expressed genes from spinal cord after firearm injury to rabbit sciatic nerves

Objective: Peripheral nerve regeneration depends on gene regulation by central neurons. To search for more effective treatment methods to improve the regeneration of wounded peripheral nerves, gene expression profile of spinal cord after firearm injury to rabbit sciatic nerves are studied with DNA micro-array technique. Methods: A total of 54 rabbits were randomly divided into 4 groups: Groups dl, d3, d7 and normal control group. Lumbar spinal cords were sampled. RNAand mRNA were extracted, labeled by Cy3 and Cy5, and analyzed by mouse_8192S gene chips. Results: A total of 1367, 923, and 61 genes with differential expression were found on day 1, day 3, and day 7 after trauma respectively. Five expressed sequence tag (EST) sequences demonstrated differential expression during 7 days after trauma. Conclusions: There is complex gene profile with differential expression after firearm nerve injury, among which AW701496, U84291, W13926, X04017 andAW822394 EST sequences may be important regulation factors that involved in regeneration of peripheral nerve injury.     

己酮可可碱对术后痛模型大鼠脊髓胶质细胞激活的影响

Objective To investigate the effect of intraperitoneal administration of pentoxifylline on the development of hyperalgesia and the activation of glial cells in a rat model of postoperative pain. Methods Sixty male SD rats weight 190 g-220 g were randomly divided into 2 groups: control group (NS group) and treatment group (PTX group), in which 50 mg/kg saline vehicle or pentoxifylline (n=30) was given intraperitoneally 15 min before surgery and continued once a day to the 5th day after the operation, respectively.The animal model of postoperative pain was established by incision hind paw. Cumulative pain score and paw withdrawal threshold were measured at 1 d before operation and then at 1, 2, 3, and 5 h and 1, 2, 3, and 5 d after operation.Spinal cord tissue samples from rats were taken for analysis of glial fibrillary acid protein (GFAP) and ionized calcium bindingadaptor molecule-1 (Iba-1) expression by means of immunohistochemistry at the following times after operation: 1, 2, 3, and 0.8, 6.6±0.5, 8.6±0.7, 10.2±0.4, 7.0±0.6 and 5.6±0.5 in the PTX group respectively, less than the NS group with 4.0±0.6, 6.0±and 3 d, the PWT were (5.8±1.6), (5.2±1.1), (4.4±0.6), (4.9±0.4), (5.2±1.1), (7.6±1.8) and (10.4±1.6) g in the PTX group respectively, more than the NS group with (2.4 ±0.8), (2.1±0.5), (2.0±0.5), (2.1±0.3), (2.3±0.5), (4.5±0.9)and(8.1±1.4) g 205.6±4.2 and 230.2±3.2 in the PTX group respectively, lower than the NS group with 244.1±4.9, 258.6±4.12 and 276.2±3.4 (P＜the PTX group respectively, lower than the NS group with 230±3 and 205±4 (P＜0.05). Conclusion Pentoxifylline can attenuate the process of mechanical allodynia in a rat model of postoperative pain, its main mechanism may be related to the inhibition of glial cells activation in the spinal cord.     

离体角质形成细胞热损伤模型建立及细胞凋亡观察

Objective To reproduce a model of heat injured KC in vitro and explore its apoptosis rate of KC due to heat injury at different temperature. Methods Human KCs were cultured in vitro, and they were incubated at 37, 41, 43,45, 48, and 51 ℃ respectively for 10 mins in water bath. Trypan blue staining and Hoechst 33258 fluorescence staining were used respectively to determine necrosis and apoptosis of KC. Rates of apoptosis and necrosis of KC were analyzed quantitatively by flow cytometer. The prolifera-tion activity of KC after heat injury was detected by MTT test. Results The results of trypan blue stai-ning, Hoechst 33258 fluorescence staining, and flow cytometer demonstrated that number of apoptotic and necrotic KC increased gradually along with a rise of water bath temperature. The rates of apoptosis and necro-sis of KCwererespectively(12.3±3.2)% and (14.1±1.6)% at 45℃, (27.7±5.1)% and (58.0± 4.2)% at 48 ℃. Rate of KC necrosis reached up to (83.0±5.3)% at 51℃. Inhibition of KC growth reached a stationary phase when the injurious temperature reached 45 ℃ as observed with MTT test. Con-clusions Heat injury can induce apoptosis and growth inhibition of KC in vitro. Incubating KC at 45 ℃ for 10 mins is a good condition to reproduce a model of heat injured KC in vitro. This model may be used to study the biological character and apoptosis of KC after burn injury.     

离体角质形成细胞热损伤模型建立及细胞凋亡观察

Objective To reproduce a model of heat injured KC in vitro and explore its apoptosis rate of KC due to heat injury at different temperature. Methods Human KCs were cultured in vitro, and they were incubated at 37, 41, 43,45, 48, and 51 ℃ respectively for 10 mins in water bath. Trypan blue staining and Hoechst 33258 fluorescence staining were used respectively to determine necrosis and apoptosis of KC. Rates of apoptosis and necrosis of KC were analyzed quantitatively by flow cytometer. The prolifera-tion activity of KC after heat injury was detected by MTT test. Results The results of trypan blue stai-ning, Hoechst 33258 fluorescence staining, and flow cytometer demonstrated that number of apoptotic and necrotic KC increased gradually along with a rise of water bath temperature. The rates of apoptosis and necro-sis of KCwererespectively(12.3±3.2)% and (14.1±1.6)% at 45℃, (27.7±5.1)% and (58.0± 4.2)% at 48 ℃. Rate of KC necrosis reached up to (83.0±5.3)% at 51℃. Inhibition of KC growth reached a stationary phase when the injurious temperature reached 45 ℃ as observed with MTT test. Con-clusions Heat injury can induce apoptosis and growth inhibition of KC in vitro. Incubating KC at 45 ℃ for 10 mins is a good condition to reproduce a model of heat injured KC in vitro. This model may be used to study the biological character and apoptosis of KC after burn injury.     

Foxo3a和p27kip1在大鼠坐骨神经损伤后背根神经节中的表达

目的 探讨坐骨神经夹伤后Foxo3a和p27kip1在腰段背根神经节(DRG)中表达变化及其意义.方法 将成年SD大鼠随机分为正常对照组和实验组.对实验组实行坐骨神经夹伤术.运用蛋白质印迹、免疫荧光双标,研究大鼠坐骨神经夹伤后,腰段DRG中Foxo3a和p27kip1的表达、分布以及细胞增殖和轴突再生情况.结果 Foxo3a在坐骨神经夹伤后1 d表达值(7.0±3.5)开始明显下降,2 d表达值(6.0±3.8)达到最低值,随之逐渐升高,p27kip1在坐骨神经夹伤后2 d表达值(29.0±3.5)表达开始明显下降,7 d表达值(21.0±3.0)达到最低值,随之逐渐升高;Foxo3a和p27kip1分布于神经元和神经胶质细胞内且在坐骨神经夹伤后2d DRG中,Foxo3a和p27kip1在神经元细胞[(37.8±5.7)%、(43.3±4.3)%]和神经胶质细胞[(22.4±3.9)%、(13.8±3.2)%]中表达较在正常组神经元细胞[(73.6±2.5)%、(84.1±3.7)%]和神经胶质细胞[(61.3±4.4)%、(68.7±5.6)%]减少;细胞核增殖抗原(proliferating cell nuclear antigen,PCNA)和神经元生长相关蛋白(GAP-43)在坐骨神经夹伤后2 d DRG中表达值[12±2.6,15±1.9]均开始上调,PCNA在7 d表达值(25.0±3.2)达到最高点,GAP-43则保持较高水平;此外,PCNA与神经胶质细胞共定位明显,与神经元细胞几乎无共定位.结论 大鼠坐骨神经损伤后,Foxo3a和p27kip1在腰段DRG中的表达减少与神经胶质细胞增殖和轴突再生密切相关.     

Survivin和p27kipl在胆囊癌中的表达及相关性研究

目的 检测胆囊癌中Survivin和p27kip1的表达,研究它们与胆囊癌临床病理特征的关系.并探讨两者的相关性.方法 采用免疫组织化学技术检测50例胆囊癌组织、20例胆囊息肉、20例胆囊炎组织中Survivin和p27kip1表达.结果 50例胆囊癌组织中39例Survivin蛋白表达阳性,22例p27kip1蛋白表达阳性.二者表达呈负相关系;Survivin在胆囊息肉和胆囊炎标本中不表达,p27kip1在胆囊息肉和胆囊炎标本中呈高表达;Survivin在胆囊癌中的表达与病人性别、年龄、病理分级、Nevin分期、淋巴结转移无关(P>0.05),p27kip1在胆囊癌中的表达与病理分级、Nevin分期、淋巴结转移有关(P<0.05),而与年龄、性别无明显相关性.结论 Survivin和p27kip1表达异常可能在胆囊癌的发生、发展中起重要的作用,二者在胆囊癌的发生、发展中可能有相互作用;Survivin在胆囊癌中的高表达提示其可能与肿瘤的发生有关;p27kip1有可能成为判断胆囊癌预后的有效指标之一.     

曲古抑菌素A诱导膀胱癌细胞p27kip1、XIAP表达的实验研究

目的 观察组蛋白去乙酰化酶(HDAC)抑制剂曲古抑菌素A(TSA)对体外培养膀胱癌细胞生长情况及相关基因(p27kip1、XIAP)表达的影响,并探讨其可能的作用机制.方法 采用MTT法检测不同浓度TSA(100、200、400、800nmol/L)对人膀胱癌BIU-87细胞生长的影响;流式细胞术(FCM)检测TSA处理后膀胱癌细胞周期分布的变化及对膀胱癌细胞凋亡的影响;Western blot检测TSA作用BIU-87细胞后p27kip1、XIAP蛋白表达的变化.结果 TSA体外能明显抑制BIU-87细胞的生长,且抑制作用呈明显的剂量、时间依赖性.FCM检测示处理后膀胱癌细胞阻滞于G0-G1期,Western blot结果示TSA处理能显著诱导p27kip1蛋白的表达和显著抑制XIAP蛋白的表达.结论 TSA可通过诱导细胞凋亡,使细胞阻滞于G1期而发挥体外抗膀胱癌作用,其作用机制可能涉及相关基因(p27kip1、XIAP)表达的调控.     

昆布多糖硫酸酯对PC-3细胞PTEN和P27kip1基因表达的影响

目的:研究昆布多糖硫酸酯(LAMS)对体外培养的非激素依赖型人前列腺癌细胞株PC-3的作用,以及对PC-3细胞PTEN和P27kip1基因表达的影响,并探讨其抗肿瘤的作用机制。方法:分别用0、50、100、200μg/ml浓度的LAMS作用于PC-3细胞,用WST-8法检测其对细胞生长的抑制作用,利用流式细胞术(FCM)分析细胞周期和凋亡的变化,用荧光显微镜观察PC-3细胞形态的变化,RT-PCR和Western印迹检测细胞增殖、凋亡相关基因PTEN和P27kip1mRNA及蛋白的表达。结果:LAMS能抑制PC-3细胞的增殖,呈时间-剂量效应;不同浓度LAMS诱导PC-3细胞出现剂量依赖性S期阻滞;LAMS作用于PC-3细胞后凋亡率增加,并出现凋亡的形态学改变,相关基因PTEN和P27kip1mRNA及蛋白的表达呈剂量依赖性增加。结论:LAMS能抑制体外PC-3细胞的生长,并促进其S期阻滞和凋亡,PTEN和P27kip1mRNA及蛋白的表达明显增加,可能是其抑制前列腺癌生长的机制之一。     

p27kip1在胆管癌组织中的表达与临床病理特征的相关性研究

目的探讨细胞周期抑制蛋白p27kip1在胆管癌组织中的表达及与胆管癌各项临床病理特征的关系。方法采用免疫组化法检测43例胆管癌组织及10例伴慢性胆管炎的胆管壁组织中p27kip1的表达,结合临床病理资料进行回顾性分析。结果①p27kip1在胆管癌组织中的阳性表达率为30.23%(13/43),而在伴慢性炎症的胆管组织中阳性表达率为80.00%(8/10),差异有统计学意义(P<0.05)。②p27kip1蛋白表达与胆管癌的分化程度及临床分期呈显著相关(P<0.05)。结论胆管癌中p27kip1蛋白低表达可能与胆管癌的发生发展有关,检测p27kip1的表达对胆管癌的预测有一定的参考价值。     

cyclin E和p27kip1蛋白在胆囊癌组织中的表达及其意义

目的　探讨cyclinE和 p2 7kip1蛋白在胆囊癌组织中的表达及其意义。方法　采用免疫组化SP法检测 4 1例胆囊癌和 15例慢性胆囊炎组织中cyclinE及p2 7kip1蛋白的表达 ,并分析两者的表达与胆囊癌临床病理特征的关系。结果　cyclinE在胆囊癌组织中的表达阳性率为 6 1.0 % (2 5 / 4 1) ,显著高于慢性胆囊炎的 2 0 .0 % (3/15 ) ,P<0 .0 5 ;胆囊癌组织中p2 7kip1蛋白的表达阳性率为 5 3.7% ,低于慢性胆囊炎的 10 0 % (P<0 .0 5 )。cyclinE的表达与胆囊癌TNM分期呈正相关 (r =0 .314 ,P<0 .0 5 ) ,p2 7kip1蛋白的表达则随胆囊癌TNM分期进展、组织学分化程度的降低而逐渐下降 (P<0 .0 5 ) ,cyclinE与 p2 7kip1蛋白表达之间呈负相关 (r =- 0 .342 ,P<0 .0 5 )。结论　cyclinE蛋白高表达和 p2 7kip1蛋白表达下降导致细胞周期的调控异常 ,可能参与了胆囊癌的发生、发展过程。     

bcl-2、cyclinD1、P27~(kip1)在肾癌中的表达及相关性

目的探讨bcl-2、cyclinD1、p27kip1 mRNA水平在肾细胞癌(RCC)中的表达及其意义。方法采用RT-PCR半定量方法检测42例肾癌患者(透明细胞癌33例,非透明细胞癌9例)癌组织和10例正常肾组织中bcl-2、cyclinD1、p27kip1 mRNA的表达情况。结果 42例肾癌标本中bcl-2 mRNA、cyclinD1 mRNA表达的中位值(分别为0.56、0.65),均显著高于正常肾组织(分别为0.13、0.15)(P0.05);而p27kip1mRNA在肾癌中表达的中位值0.46,显著低于正常组织(0.86)(P0.05)。在肾癌临床分期中bcl-2在Ⅰ+Ⅱ期肾癌组织中表达高于Ⅲ+Ⅳ期(P0.05),cyclinD1在Ⅰ+Ⅱ期肾癌组织中表达低于Ⅲ+Ⅳ期(P0.05),p27kip1 mRNA表达量随着临床分期的升高而降低(P0.05);bcl-2、cyclinD1在非透明细胞癌组中表达量分别为0.39±0.18、0.55±0.08,低于透明细胞癌组的0.58±0.19、0.66±0.08(P0.05),p27kip1在透明细胞癌组和非透明细胞癌组中表达量(P0.05)无差异。偏相关分析示P27kip1与cyclinD1之间相关系数为-0.57(P0.01),p27kip1与bcl-2之间相关系数为0.44(P0.01);而cyclinD1与bcl-2之间相关系数为-0.06,无相关性(P0.05)。结论 bcl-2、cyclinD1高表达和p27kip1低表达与肾癌的发生、发展有密切关系;检测bcl-2、cyclinD1、p27kip1 mRNA可作为诊断肾癌的参考指标;p27kip1与cyclinD1负相关、与bcl-2正相关,而cyclinD1与bcl-2之间无相关性。     

P27kip1在胰腺癌中的表达及临床意义

目的　研究P2 7kip1在胰腺癌发生发展中的作用及预后意义。方法　用免疫组织化学方法研究P2 7kip1在 39例胰腺癌手术切除标本及 5例正常胰腺标本中的表达 ,其结果与临床病理资料及CyclinD1的表达进行相关性分析。结果　 39例胰腺癌中 ,2 6例 (6 6 7% )P2 7kip1呈低水平表达 (阳性细胞数 <5 0 % ) ,仅 13例 (33 3% )表达水平与正常胰腺组织相似 (阳性细胞数 >5 0 % )。相关分析显示 :P2 7kip1表达缺失或下调与肿瘤的不良分化相关 (P =0 0 3) ,但与性别、年龄及TNM分期无关。Kaplan Meier生存曲线表明 ,肿瘤呈高表达的病人术后总体生存期较低表达者明显延长 (P <0 0 1)。此外 ,还发现P2 7kip1与CyclinD1的表达呈负相关趋势 ,但未达到显著性水平 (P =0 0 98)。 结论　P2 7kip1在胰腺癌发生、发展中有重要的作用 ,可作为胰腺癌切除后一种新的预后指标。     

P27kip1及相关分子Jab1在大鼠损伤脊髓中的表达变化及意义

【摘要】 目的：观察大鼠脊髓损伤过程中P27kip1及相关分子Jab1在脊髓中的表达及细胞定位情况,探讨其在脊髓损伤后胶质细胞增生及胶质瘢痕生成中的作用。方法：取56只雄性SD大鼠,随机分为实验组与对照组,其中实验组按脊髓损伤时间分为6h、12h、1d、3d、5d、7d、14d组,实验组按照Allen′s法制作SD大鼠脊髓损伤模型,对照组则仅打开椎板,不损伤脊髓。首先利用Western Blot观察P27kip1及相关分子Jab1在脊髓损伤后的表达水平变化,然后利用免疫组化观察脊髓损伤后3d时的P27kip1及5d时Jab1的阳性细胞表达变化,最后利用免疫荧光双标观察脊髓损伤后5d时Jab1的细胞定位变化。结果：Western Blot结果显示P27kip1在脊髓损伤后6h、12h、1d、3d、5d、7d、14d组的相对灰度值分别是1.00±0.10、0.82±0.05、0.27±0.03、0.34±0.03、0.25±0.02、0.28±0.03、0.57±0.05,其中1d、3d、5d、7d、14d组与对照组（0.98±0.08）相比均明显降低（P<0.05）,而Jab1的6h、12h、1d、3d、5d、7d、14d组的相对灰度值分别是0.58±0.08、0.53±0.04、0.89±0.11、1.06±0.24、1.22±0.26、0.85±0.16、0.25±0.03,其中6h、12h、1d、3d、5d、7d组与对照组（0.19±0.04）相比明显升高（P<0.05）,P27kip1于脊髓损伤后表达下降,Jab1在脊髓损伤后表达上升。3d时实验组P27kip1免疫组化阳性细胞数为130.8±29.8个,与对照组（406.8±56.6个）相比减少（P<0.05）;5d时实验组Jab1免疫组化阳性细胞数为383.5±68.8个,与对照组（123.5±42.6个）相比增多（P<0.05）,从形态学上进一步证明了这种变化。在免疫荧光双标实验中,5d时实验组Jab1与GFAP双阳性细胞数量为383.3±39.1个,较对照组（114.3±35.6个）明显增多（P<0.05）。结论：在大鼠脊髓损伤中,Jab1与P27kip1存在相互作用,Jab1参与脊髓损伤后P27kip1的降解,这可能与脊髓损伤后星形胶质细胞的过度增殖及胶质瘢痕的生成相关。