Progress in Wnt signaling pathway and tumorigenesis / 实用肿瘤学杂志

The Wnt/beta-catenin signaling pathway plays an important role in tumorigenesis and development,and is a key pathway mediating carcinogenesis. Therefore,further studies of Wnt/beta-catenin signaling pathway may provide powerful help for exploring the pathogenesis of tumors and seeking effective diagnosis and therapy. This article reviews the research progress of Wnt/be-ta-catenin signaling pathway and tumorigenesis.

Interference of ROR1 gene expression inhibits epithelial-mesenchymal transition of osteosarcoma MG-63 cells / 肿瘤

Objective: To investigate the effect of interferencing receptor tyrosine kinase-like orphan receptor 1 (ROR1) gene expression on epithelialmesenchymal transition (EMT) of osteosarcoma MG-63 cells. Methods: The specific siRNA targeting ROR1 gene (ROR1-siRNA) was transfected into osteosarcoma MG-63 cells with the relative high expression of ROR1 protein, then the down-regulation of ROR1 expression was confirmed by Western blotting. The migration and invasion abilities of MG-63 cells were examined by scratch wound healing assay and Transwell chamber assay. The morphological changes of MG-63 cells were observed under an inverted optical microscope. Finally, the expressions of EMT-associated E-cadherin and vimentin, and tumor metastasis-related zinc finger E-box binding homeobox protein 1 (ZEB1), matrix metalloproteinase 2 (MMP-2) and MMP-9 proteins in MG-63 cells were detected by Western blotting and immunofluoresence staining, respectively. Results: ROR1-siRNA transfection significantly inhibited the expression of ROR1 in MG-63 cells (P < 0.05). After down-regulating ROR1 gene expression by ROR1-siRNA transfection, the migration and invasion abilities of MG-63 cells were significantly reduced (both P < 0.05), the morphology of MG-63 cells conversed from mesenchymal phenotype to epithelial phenotype, and the expression level of E-cadherin was significantly up-regulated (P < 0.05), while the expression level of vimentin was significantly down-regulated (P < 0.05). Furthermore, the expressions of ZEB1, MMP-2 and MMP-9 in MG-63 cells transfected with ROR1-siRNA were decreased as compared with those in the untransfected group (all P < 0.05). Conclusion: RNA interference of ROR1 gene expression can reduce the migration and invasion abilities of osteosarcoma MG-63 cells through inhibiting the occurrence of EMT.

Correlation analysis between clinical features and renal dysfunction in patients of acute lacunar infarction with progressive cerebral microbleeds / 中国医师进修杂志

Objective To analyze the correlation between clinical features and renal dysfunction in patients of acute lacunar infarction with progressive cerebral microbleeds (CMBs). Methods Two hundred and sixty-five patients with first-episode acute lacunar infarction were selected. The serum creatinine was measured within 24 h of admission and the estimated glomerular filtration rate (eGFR) was calculated. The brain MRI (including gradient-echo images) was examined within 2 d of admission and after 1 years of follow-up, respectively. The progressive CMBs was assessed with microbleeds anatomical rating scale (MARS), and the patients were divided into progressive CMBs group (progressive group, 42 cases) and non progressive CMBs group (non progressive group, 223 cases). The clinical features of 2 groups were compared and the correlation between progressive CMBs and renal dysfunction was analyzed. Results The age, 24 h pulse pressure, incidences of renal dysfunction and CMBs in progressive group were significantly higher than those in non progressive group: (69.8 ± 5.8) years vs. (61.5 ± 4.9) years, (63.3 ± 3.1) mmHg (1 mmHg=0.133 kPa) vs. (51.8 ± 4.2) mmHg, 69.0％(29/42) vs. 39.9％(89/223) and 57.1％(24/42) vs. 25.1％(56/223), and the platelet was significantly lower than that in non-progression group:(168 ± 35) ×109/L vs. (189 ± 40) ×109/L, and there were statistical differences (P<0.05 or<0.01). The Logistic regression analysis result showed that renal dysfunction and CMBs were Independent risk factors of progressive CMBs (OR = 1.571 and 1.054, 95％ CI 1.042 - 2.493 and 1.010 - 1.142, P<0.05). Conclusions The rate of renal dysfunction is higher in patients of acute lacunar infarction with progressive CMBs, and progressive CMBs are associated with renal dysfunction.

Effect of Knocking Down ski on Migration of Astrocytes in Rats / 中国康复理论与实践

Objective To investigate the effect of ski gene in migration process of astrocytes in rats. Methods Astrocytes were obtained from rats' cerebral cortex and cultured in vitro. siRNA targeting ski gene and negative control sequences were prepared. The ski-siRNA group, siRNA negative control group and untreated group were set in this experiment. The specific siRNA targeting ski gene was transfected into astrocytes with Lipofectamine?RNAiMAX Reagent. Then the ski protein levels were determined with Western blotting. After transfec-tion, the changes in migration of astrocytes were measured with wound scratch assay and Transwell migration assay. Results Western blot-ting showed that the expression of ski protein was significantly lower in the ski-siRNA group than in the siRNA negative control group and untreated group (F=132.957, P47.197, P69.187, P<0.001). Conclusion Ski knocked down by siRNA could inhibit the migration ability of astrocytes. It is a reminding that ski may take part in the migration process of astrocytes, and moreover, ski may play an important role in the formation of glial scar.

Relationship between different topographic location and neurological deterioration in acute new isolated pontine infarction / 中国医师杂志

Objective To investigate the relationship between different topographic locations and neurological deteriorations (ND) in patients with acute new isolated pontine infarction.Methods One hundred sixty-eight patients with acute new isolated pontine infarction during arch 2012 to March 2016 were identified by diffusion weighted imaging (DWI) for retrospective review.Patients were divided into two groups according to their clinical symptoms:patients with ND and patients without ND.According to neuroimaging of DWI,the topographic location of pontine infarction was divided into three types:The upper,middle,and lower ones,and the correlations of ND with risk factors,laboratory examination results,clinical manifestations and different topographic locations were explored by statistical tests.Results Of 168 patients,26.8％ (45/168) were diagnosed with ND,and 73.2％ (123/168) were diagnosed without ND.Univariate analysis showed that there were differences in female ratio [62.2％ (28/45) vs 41.5％ (51/ 123)],smoking ratio [13.3％ (6/45) vs 26.0％ (32/123)],mean length of hospital stay [(22.83 ± 7.12)d vs (19.31 ± 7.65)d],ratio of worse short-term clinical outcomes [77.8％ (35/45) vs 33.3％ (41/123)],and ratio of lower pontine infarction [55.6％ (25/45) vs 26.0％ (32/123)] between two groups (P ＜ 0.05).Logistic regression analysis showed that lower pontine infarction was the independent risk factor of ND (OR =1.953,95％ CI:1.092-3.535,P =0.029).Conclusions Topographic location of lower pons lesions may be reliable predictor of ND in acute new isolated pontine infarction.

Research progress of Wnt/β-catenin signaling pathway in tumor drug resistance / 国际肿瘤学杂志

Wnt/β-catenin signaling pathway participates in cancer cell proliferation,invasion and metastasis and effectively induces drug resistance.It is also the key signal to mediate cancer carcinogenesis.Recent studies in vitro indicate that disturbance of Wnt/β-catenin signaling pathway can increase the sensitivity of the cancer cells to chemotherapeutic drugs.In-depth researches and analysis of tumor drug resistance induced by Wnt/β-catenin will provide potential targets and possible therapeutic means for the treatment of tumors.

Surgical management and mid-term follow-up of idiopathic normal pressure hydrocephalus in geriatric patients / 中华老年医学杂志

Objective To evaluate the short-term and mid-term outcomes in geriatric patients with idiopathic normal pressure hydrocephalus treated with adjustable valve. Methods The 29 patients were selected for the ventriculo-peritoneal shunt by the means of preoperative lumbar tap test and external lumbar drainage test. All patients were assessed by Mini Mental State Examination (MMSE) and timed 10-meter walk test. Results Short-term improvement in gait disturbance and cognitive function could be achieved obviously, and mid-term improvement could not be sustained. The 3 patients had shunt obstruction, 1 had subdural hygroma. 1 case died of pulmonary infection and 2 died of cardiac disease. Conclusions The lumbar tap test and external lumbar drainage test are highly prognostic procedures for identifying patients with idiopathic normal pressure hydrocephalus who mostly likely benefit from shunt surgery. The short-term improvement can be achieved, whereas mid-term improvement can not be sustained. Surgical outcome can be improved by the use of adjustable valve.

The diagnosis and treatment of ventriculitis following ventricular-peritoneal shunt / 中国综合临床

Objective To study the bacteriology, clinical characteristics and treatment of ventriculitis fol-lowing ventricular-peritoneal shunt. Methods The clinical data and bacteriological results of eight patients with ven-triculitis following ventricular-peritoneal shunt from April 1998 to April 2007 were analyzed retrospectively. Shunt de-vice was removed in all patients. Intraventricular and intravenous antibiotics were given until the infection was con-trolled,and a secondary shunt device was placed. Results In eight patients,five were infected by Staph. Epidermi-dis,one by a mixed infection of Staph. Aureus and Pseudomonas acruginosa,one by Staph. Aureus,and one by E. Co-li. All patients were given intraventricular and intravenous antibiotics therapy. 8 cases recovered well after treatment. Conclusion Ventriculitis following ventricular-peritoneal shunt is a dangerous complication and is not easy to cure. After the removal of shunt device, a satisfactory result could be achieved by the administration of intraventricular and intravenous antibiotics.

Protective effect of pyrroloquinoline quinone on damage of hippocampal neurons induced by NMDA in rats / 中国康复理论与实践

@# ObjectiveTo investigate the protective effect of pyrroloquinoline quinone (PQQ) on damage of hippocampal neurons induced by NMDA.MethodsHippocampal neurons were cultured in vitro and NMDA was used to induce neurotoxicity 8 d after, while PQQ were used or not before. The metamorphosis of hippocampal neurons was observed under the microscope. Intracellular calcium levels was measured by confocal laser microscopy. ResultsThe intracellular Ca2+ level increased rapidly after exposure to 0.1 mmol/L NMDA and resulted in neuronal necrosis and apoptosis. Otherwise, pretreatment of the cultured neurons with PQQ reduced the increase of the intracellular Ca2+ level and the neuronal necrosis or apoptosis induced by NMDA.ConclusionPQQ can protect hippocampal neurons from damage induced by NMDA.

Diagnosis and treatment of subclinical pituitary apoplexy: report of 21 cases / 中华外科杂志

<p><b>OBJECTIVES</b>To evaluate clinical manifestations of 21 patients with subclinical pituitary apoplexy and their diagnosis and treatment.</p><p><b>METHOD</b>Clinical data from 21 patients with subclinical pituitary apoplexy treated from October 1989 to November 2001 were analyzed retrospectively.</p><p><b>RESULTS</b>Their clinical manifestations included chronic headache, visual deficit and field cut. Three patients showed no clinical signs. Microsurgery was performed in 20 patients, of whom 3 were treated by emergency operation. Microsurgery included transsphenoidal decompression in 17 patients, and transpterioral approach in 3. One patient was given conservative therapy, and 12 were given endocrine replacement therapy. Nineteen patients recovered with marked visual improvement (7), partial improvement (8), no changes (4); deterioration was noted in 1.</p><p><b>CONCLUSIONS</b>Subclinical pituitary apoplexy characterized by atypical clinical manifestations may be misdiagnosed or in appropriately treated. MRI is superior to CT scan for the diagnosis of subclinical pituitary apoplexy. Patients with persistent chiasmatic syndromes are indicated for emergency surgery. Endocrine replacement and transsphnoidal decompression are effective for the improvement of severe visual disturbance.</p>