Experiment study on combined free periosteum grafting and new reconstituted bone xenograft in repairing segmental defects

Segmental bone defects in long bones often pose achallenge tO their sMcal ~nt, and the vasculallzedperiosted po used either alone or in combination withother ~ materials has been Preferred as a uSeals solution to this Problems"'l. HOwever, the use Of vascularized graft has to resort to ndcrosuopcal tecboqUes, Whichmakes it difficult tO populallze this OPe~ in the graSsests level intitutions. We Pimeeded with combined useOf free Periosteum and new reconshtuted bine xenograft(NRBX) in re…     

右旋酮洛芬的解热镇痛作用

目的 研究右旋酮洛芬(Dexketoprofen, D-KP)的解热镇痛作用.方法 采用小鼠热板法和热辐射甩尾法两种镇痛实验模型;角叉菜胶诱导的大鼠和伤寒疫苗诱导的兔体温升高两种实验模型.结果 D-KP(5、10、20 mg.kg-1)能明显延长小鼠热板和热辐射甩尾的痛阈时间;D-KP(2.5、5、10 mg.kg-1)对角叉菜胶诱发大鼠的体温升高、D-KP(1.25、2.5、5 mg.kg-1)对伤寒疫苗诱发兔的体温升高均有明显的降温作用.结论 D-KP具有良好的解热镇痛作用.     

血清MIA检测在恶性黑素瘤诊断中的临床价值

探讨血清黑素抑制蛋白（ｍｅｌｏｎｏｍａ－ｉｎｈｉｂｉｔｉｎｇ ａｃｔｉｖｉｔｙ ｐｒｏｔｅｉｎ,ＭＩＡ）在恶性黑素瘤诊断中的价值。方法：采用ＥＬＩＳＡ方法,检测不同临床分期的黑素瘤及其他恶性肿瘤患者,以及正常人血清ＭＩＡ浓度。结果正常成人（ｎ＝２０）和肺癌（ｎ＝１０）、肝癌、（ｎ＝１２）结肠癌（ｎ＝１２）患者血清ＭＩＡ浓度全部低于正常（６．５ｎｇ／ｍｌ）水平,黑素瘤患者血清ＭＩＡ浓度明显升高,阳性     

ODC反义寡核苷酸对K562细胞生长抑制作用

鸟氨酸脱羧酶(ornithine decarboxylase,ODC)是催化多胺生物合成的限速酶.过去的研究表明多胺在维持肿瘤恶性表型中起着重要作用.用ODC不可逆抑制剂抑制多胺生物合成不仅能抑制肿瘤细胞的增殖而且还诱导细胞分化.近年我们采用反义技术,以ODC反义RNA转染肿瘤细胞,通过对ODC表达的封闭,成功地使其恶性表型得到了逆转.提示抑制肿瘤细胞的多胺合成可能是抗癌的有效途径.本文用ODC反义寡核苷酸控制肿瘤细胞的多胺生物合成,观察了其对K562细胞生长特性的影响,以期为ODC反义寡核苷酸在肿瘤临床的应用提供实验依据.     

Antitumor Immunity Induction by Intracellular Hyperthermia Using Magnetite Cationic Liposomes

Induction of antitumor immunity to T-9 rat glioma by intracellular hyperthermia using functional magnetic particles was investigated. Magnetite cationic liposomes (MCLs), which have a positive surface charge, were used as heating mediators for intracellular hyperthermia. Solid T-9 glioma tissues were formed subcutaneously on both femurs of female F344 rats, and MCLs were injected via a needle only into the left solid tumors (treatment side). The rats were then divided into two groups, which received no irradiation, or irradiation for 30 min given three times at 24-h intervals with an alternating magnetic field (118 kHz, 384 Oe). On the treatment side, the tumor tissue disappeared completely in many rats exposed to the magnetic field. The tumor tissue on the opposite side also disappeared completely, even though MCLs were not injected into the right solid tumors. To examine whether a long-lasting and tumor-specific immunity could be generated, the rats that had been cured by the hyperthermia treatment were rechallenged with T-9 cells 3 months later. After a period of transient growth, all tumors disappeared. Furthermore, immuno-cytochemical assay revealed that the immune response induced by the hyperthermia treatment was mediated by both CD8⁺ and CD4⁺ T cells and accompanied by a marked augmentation of tumor-selective cytotoxic T lymphocyte activity. These results suggest that our magnetic particles are potentially effective tools for hyperthermic treatment of solid tumors, because in addition to killing of the tumor cells by heat, a host immune response is induced.     

Infrequent Mutations of the hOGG1 Gene, That Is Involved in the Excision of 8-Hydroxyguanine in Damaged DNA, in Human Gastric Cancer

DNA glycosylase, encoded by the hOGG1 gene, repairs 8-hydroxyguanine (oh⁸Gua), which is an oxidatively damaged mutagenic base. To clarify whether the DNA repair activity of hOGG1 protein is involved in gastric carcinogenesis, we examined 9 gastric cancer cell lines and 35 primary gastric cancers for mutations and genetic polymorphisms of the hOGG1 gene by polymerase chain reaction-single strand conformation polymorphism analysis. A G-to-A transition was detected in a gastric cancer cell line, MKN1. This nucleotide change caused the conversion of the amino acid from Arg to His at codon 154, which is located in a domain highly conserved among human, mouse, and yeast OGG1 proteins. No mutation was detected in primary gastric cancers. We compared the distribution of the polymorphic alleles associated with enzymatic activity (hOGG1-Ser³²⁶ vs. hOGG1-Cys³²⁶) between 35 gastric cancer patients and 42 healthy individuals. Although the frequency of the Cys³²⁶ allele, associated with low enzymatic activity, in gastric cancer patients was a little higher than that in healthy individuals, the difference did not reach statistical significance. These results suggest that low hOGG1 activity due to mutations and genetic polymorphisms is involved in the development of only a small subset of gastric cancers.     

急性白血病早期死亡高危因素的Logistic回归分析

为了解急性白血病（ＡＬ）早期死亡的高危因素，对近１０ａ上海地区２７家医院共３４７例ＡＬ住院患者早期死亡的高危因素进行了Ｌｏｇｉｓｔｉｃ回归分析。结果表明：出血、感染和多脏器衰竭是ＡＬ死亡的主要原因。全反式维甲酸的应用降低了急性早幼粒细胞白血病早期病死率，早期死亡的高危因素为：年龄≥６０岁或≤１岁，发病时伴有出血，弥散性毛细血管内凝血，肝脏明显肿大，ＦＡＢ分类属于急性骨髓细胞白血病，外周血细胞＞１００×１０９／Ｌ，ＢＰＣ＜５０×１０９／Ｌ，伴发病发热和感染。提示：为了降低ＡＬ的早期病死率，必须针对上述高危因素采取相应防治措施     

THE INTRACELLULAR FORM OF EPSTEIN-BARR VIRUS GENOME IN NASOPHARYNGEAL CARCINOMA

ＴＨＥＩＮＴＲＡＣＥＬＬＵＬＡＲＦＯＲＭＯＦＥＰＳＴＥＩＮＢＡＲＲＶＩＲＵＳＧＥＮＯＭＥＩＮＮＡＳＯＰＨＡＲＹＮＧＥＡＬＣＡＲＣＩＮＯＭＡＷａｎｇＨｕｉｍｉｎ１汪慧民ＣｈｅｎＪｕｎ１陈军ＺｅｎｇＭｕｓｈｅｎｇ１曾木圣ＬｉＭａｎｚｈｉ１李满枝Ｊｉａ...     

LOSS OF HETEROZYGOSITY ON CHROMOSOME 13 IN SQUAMOUS CELL CARCINOMAS OF THE LARYNX

ＬＯＳＳＯＦＨＥＴＥＲＯＺＹＧＯＳＩＴＹＯＮＣＨＲＯＭＯＳＯＭＥ１３ＩＮＳＱＵＡＭＯＵＳＣＥＬＬＣＡＲＣＩＮＯＭＡＳＯＦＴＨＥＬＡＲＹＮＸＢａｉＳｕｊｕａｎ白素娟ＺｈａｎｇＸｕｅ张学ＷａｎｇＪｕｎ王筠ＳｕｎＫａｉｌａｉ孙开来ＦｅｉＳｈｅｎｇｚｈｏｎ...