HSP110及其免疫佐剂效应的研究进展

热休克蛋白（HSP）是一类在生物进化中高度保守、广泛存在于原核和真核生物中的蛋白质。大量资料表明，HSP作为分子伴侣，参与其它蛋白质的折叠、转运、合成等过程，并可与细胞内的其它蛋白质结合，参与细胞的抗损伤、修复和热耐受过程，某些热休克蛋白还具有佐剂效应，能够激活免疫应答反应，以往对于HSP70及其免疫治疗的研究较为广泛。近年来随着对热休克蛋白研究的不断深入，人们发现高分子量的HSP110因其强大的分子伴侣功能而具备独特的佐剂效应，因而被认为在瘤苗制备及抗肿瘤免疫中具有很大的应用前景。     

Caspase inhibitor Z-VAD-FMK potentiates heat shock-induced apoptosis and HSP70 synthesis in macrophages

Caspase inhibitor Z-VAD-FMK potentiated heat shock-induced apoptosis in macrophages. Z-VAD-FMK did not activate HSP70 synthesis, but significantly increased the intensity of this process during heat shock. It cannot be excluded that caspases abolish HSP70 accumulation under these conditions. The HSP70 synthesis inhibitor quercetin potentiated DNA fragmentation in macrophages cocultured with Z-VAD-FMK after heat shock. HSP70 play an important role in the protection of macrophages from caspase-independent apoptosis.Translated from Byulleten Eksperimentalnoi Biologii i Meditsiny, Vol. 138, No. 9, pp. 261–263, September, 2004     

Peroxisome biogenesis occurs in late dorsal-anterior structures in the development of Xenopus laevis.

Metabolism and development are two important processes not often examined in the same context. The focus of the present study is the expression of specific peroxisomal genes, the subsequent biogenesis of peroxisomes, and their potential role in the metabolism associated with the development of Xenopus laevis embryos. The temporal and expression patterns of six peroxisomal genes (PEX5, ACO, PEX19, PMP70, PEX16, and catalase) were elucidated using RT-PCR. Functionally related peroxisomal genes exhibited similar expression patterns with their RNA levels elevated relatively late during embryogenesis. Using immunohistochemistry PMP70 and catalase protein was localized largely to dorsal-anterior structures. Peroxisomal function was assayed with peroxisomal targeted-GFP, which when microinjected, revealed peroxisomes in dorsal-anterior structures at stage 45. A requirement for peroxisomal function appears to be present only late in development as organogenesis is finishing, yolk stores are depleted, and ingestion commences.     

人急性白血病淋巴细胞HSP70及 HSP70 mRNA的表达研究

目的：检测急性白血病病人血淋巴细胞热休克蛋白70（HSP70）及其mRNA的表达。方法：ELISA法检测HSP70,RT－PCR法检测HSP70 mRNA。结果：化疗前急性白血病病人淋巴细胞HSP70及mRNA明显低于正常人;而化疗后,急性白血病病人淋巴细胞HSP70及mRNA明显高于正常人（P＜0．01）,结论：HSP70与急性白血病癌细胞关系密切,对癌细胞起保护作用。     

热休克预处理诱导HSP70蛋白表达减轻神经细胞的缺血损伤

目的 :研究热休克预处理对脑缺血再灌后热休克蛋白 70 (HSP70 )的表达影响及对缺血神经细胞损伤的保护作用。方法 :采用沙鼠短暂前脑缺血再灌损伤模型 ,光镜观察缺血再灌后神经细胞损伤情况 ,免疫组化方法检测脑缺血后不同时期额叶HSP70蛋白表达。结果 :沙鼠脑缺血后HSP70蛋白仅在再灌后 1d有少量表达 (P <0 .0 1) ;缺血神经细胞在再灌后第 7d大多出现损伤改变 ;热休克预处理能增加沙鼠脑缺血再灌后各期HSP70蛋白表达 (P <0 .0 1) ,明显减轻缺血神经细胞损伤 (P <0 .0 1)。结论 :热休克预处理能通过增加HSP70蛋白表达 ,减少缺血神经细胞损伤。     

肿瘤热休克蛋白70-多肽复合物诱导特异性细胞毒T淋巴细胞产生的实验研究

目的　研究肿瘤细胞的热休克蛋白 70多肽复合物 (heatshockprotein 70peptide complexes ,HSP PC70 )诱导活化肿瘤特异性细胞毒T淋巴细胞 (cytotoxicTlymphocytes,CTL)的作用及该CTL的杀瘤效应。方法　利用细胞培养 ,流式细胞技术 ,蛋白质的分离纯化技术 ,电泳技术 ,Western blot检测方法 ,T淋巴细胞的诱导及体外扩增 ,酶标技术等 ,测定肿瘤HSP70 多肽复合物诱导活化小鼠体内CTL产生的作用。结果　HcaF细胞HSP PC70的自然表达率为 6 3.5 % ,热诱导后为 75 .5 % ;HcaF细胞的HSP PC70能够诱导活化肿瘤特异性的CTL ,该CTL在效靶比例为 5 0∶1、2 5∶1、12 .5∶1时于体外对HcaF细胞的杀伤效率分别为 84.2 %± 3.2 %、47.9%± 2 .6 %和 14.8%± 3.0 % ;该CTLCD3、CD8的阳性率分别为 93%± 7% ,92 %± 8% ;将活化的CTL注入荷瘤小鼠体内可见明显的治疗作用 ,注入 10 7CTL 4次后 ,10 0 %的小鼠获长期生存。结论　肿瘤来源的HSP PC70具有强大的免疫原性 ,可活化CD8 T淋巴细胞成为肿瘤特异性的CTL ,该CTL具有较高的体外杀瘤活性和良好的治疗作用。     

大鼠局灶性脑缺血再灌注后Hsp70的表达及与细胞凋亡的关系

目的：研究大鼠局灶性脑缺血再灌注后热休克蛋白（ｈｅａｔ ｓｈｏｃｋ ｐｒｔｅｉｎ,Ｈｓｐ）７０的表达及与细胞凋亡的关系。方法：用线栓法制备ＭＣＡＯ模型,用免疫组化法测定Ｈｓｐ７０阳性细胞及用ＴＵＮＥＬ法测定凋亡细胞。结果：缺血２ｈ即有Ｈｓｐ７０阳性细胞,６～２４ｈ明显,４８ｈ减弱,３ｄ消失。ＴＵＮＥＬ阳性细胞于再灌注后２ｈ出现,２４～４８ｈ达高峰,７２ｈ减弱。结论：脑缺血再灌注后早期即有Ｈｓｐ７０表达及细胞凋亡发生。     

Effects of benzodiazepine receptor ligands on the performance of an operant delayed matching to position task in rats: opposite effects of FG 7142 and lorazepam

The effects of a series of benzodiazepine (BZ) receptor ligands, ranging from a full agonist through to partial inverse agonists, were examined on short term working memory in the rat. The behavioural paradigm used was a discrete trial, operant delayed matching to position task, as originally described by Dunnett (1985), with delays of 0, 5, 15 and 30 s. The benzodiazepine receptor (BZR) full agonist lorazepam (0.25, 0.375 and 0.5 mg/kg) dose and delay dependently impaired matching accuracy. Lorazepam also increased the latency to respond and decreased the number of nose pokes made into the food tray during the delays. In contrast, the BZR partial agonist ZK 95 962 (1, 3, 10 mg/kg) did not affect matching accuracy, but did increase the speed of responding. The BZR antagonist ZK 93 426 (1.25, 5, 25 mg/kg) had no effects in this paradigm. The BZR weak partial inverse agonists Ro 15-4513 (0.1, 1 and 10 mg/kg) and ZK 90 886 (1, 3 and 10 mg/kg) did not affect accuracy of performance. However, both of these drugs increased the latency to respond and decreased nose poke responses. These motoric effects were particularly strong following 10 mg/kg Ro 15-4513. This shows that the effects of drugs on the accuracy of responding and on the speed of responding can be dissociated. The BZR partial inverse agonist FG 7142 had effects on matching accuracy that were dependent upon dose. The lowest dose of FG 7142 (1 mg/kg) significantly improved accuracy, whereas the highest dose (10 mg/kg) impaired accuracy. This impairment induced by FG 7142 (10 mg/kg) was accompanied by an increase in the latency to respond and a decrease in the number of nose pokes. Taken together, these results show that the accuracy of delayed matching performance can be modulated in opposite ways by the BZR full agonist lorazepam and a low dose of the BZR partial inverse agonist, FG 7142.     

肿瘤标志物DR-70在恶性肿瘤诊断中的应用

目的：评价肿瘤标志物ＤＲ－７０在恶性肿瘤中的诊断应用。方法：应用美国ＡＭＤＬ公司的ＤＲ－７０＾ＴＭ ＥＬＩＳＡ试剂盒,测定对２０例正常人和５９例恶性肿瘤病人血清ＤＲ－７０含量。结果：各种恶性肿瘤ＤＲ－７０的阳性率为６６．７￣１００％,均较正常对照组有非常显著性差异（Ｐ〈０．００１）。结论：血清ＤＲ－７０是诊断恶性肿瘤有价值的标志物。     

藏药七十味珍珠丸对动物出血和凝血时间的影响

藏药七十味珍珠丸（RNSP）灌胃给药（ig）给药0．5g／kg和1g／kg对大、小鼠的出血时间和凝血时间无影响;对“血瘀”模型大鼠的凝血时间和血小板数也无统计学差异。而ig给药2g／kg对延长小鼠出血时间的作用非常明显。