OBJECTIVETo discuss whether asiaticosides could effectively reduce the endothelial cell damage as a biochemical modulator, so as to further inhibit the post-stenting intima-media membrane hyperplasia.

METHODHuman aortic smooth muscle cells and aortic fibroblasts were selected and divided into the blank group, the rapamycin group and the asiaticoside group and the rapamycin and asiaticoside group. The expressions of muscle cells and fibroblasts TGF-beta1, Smad7 and I-collagen gene were determined by RT-PCR. The expression quantity of I-collagen protein was assayed by ELISA. The coefficient of drug interaction (CDI) between rapamycin and asiaticoside was calculated. Additionally, 16 Chinese mini-swines were randomly divided into group A and group B. One sirolimus drug-eluting stent of the same type was implanted after the high-pressure pre-expansion of anterior descending artery balloon. After the operation, the group A was intravenously injected with normal saline 30 mL x d(-1). Whereas the group B was intravenously injected with asiaticoside 30 mg x kg(-1) x d(-1)(diluted to 30 mL). The expressions of plasma vWF of the two groups were measured at the 7th and 14th days after the operation. At the 28th day after the operation, tissues of the stented vessel segments were sliced and stained to calculate the vessel area, inner stent area, lumen area and neointima area

RESULTCompared with the control group, the combination group showed significant up-regulation in smooth muscle cells and fibroblast Smad7 gene, down-regulation in TGF-beta, and obvious inhibition of I-collagen gene expression (P < 0.01). As for smooth muscle cells, there was no difference in the expression of I-collagen between the combination group and the rapamycin group, with CDI at 0. 83. As for fibroblasts, there was a significant difference in the expression of I-collagen between the combination group and the rapamycin group (P < 0.05), with CDI at 0.77. Plasma vWF of the group B was significantly lower than that of the group A (P < 0.05) at the 7th and 14th days after the operation. At the 28th day after the operation, no difference was observed in vessel area and stent area between the two groups. However, the lumen area in the group B was significantly larger than that of the group A(P < 0.05), and the neointima area of the group B was significantly smaller than that of the group A (P < 0.05).

CONCLUSIONAs an effective biochemical modulator for rapamycin, asiaticosides could inhibit TGF-beta expression, significantly decrease the synthesis and secretion of extracellular matrix, further inhibit the post-stenting intima-media membrane hyperplasia and reduce the endothelial cell damage by effectively up-regulate the expression of Smad7 protein.

Animals ; Collagen ; genetics ; metabolism ; Coronary Restenosis ; drug therapy ; prevention & control ; surgery ; Drugs, Chinese Herbal ; administration & dosage ; Humans ; Hyperplasia ; drug therapy ; genetics ; metabolism ; prevention & control ; Smad7 Protein ; genetics ; metabolism ; Stents ; adverse effects ; Swine ; Transforming Growth Factor beta1 ; genetics ; metabolism ; Triterpenes ; administration & dosage

Objective To summarize experiences of serious perioperative complications management of obstructive sleep apnea hypopnea syndrome (OSAHS) , and evaluate the effect of intervention in decreasing the incidence of serious complications. Methods Retrospective analysis of clinical data in Shenyang General Hospital of PLA and Liaoning Province Jinqiu Hospital of OSAHS surgery cases from January 1995 to December 2009 were included in this study, patients were divided into two groups according to with or without intervention. Experience and lessons were analyzed. Results Patients without and with intervention were 402 and 521 respectively, and uvulopalatopharyngoplasty (UPPP) cases in each group were 387 and 390. Five patients in the first group who accepted UPPP had breathing difficulty and were all successfully rescued, while no one in the second group had breathing difficulty. The difference was significant (P<0. 05). Sixteen patients in the first group had severe bleeding after UPPP, while only 5 patients had the severe bleeding in the second group. The difference was significant, too P <0. 05. No breathing difficulty cases in the second group, and serious bleeding cases in each group was 5 and in 1, there was no significant difference (P > 0. 05 ). Conclusions Breath difficulty and serious bleeding are serious perioperative complications of OSAHS surgery, and with systemic intervention the incidence of the complications can be decreased.

OBJECTIVETo study the feasibility and effect of substituting esophagus with stomach or colon without thoracotomy in the treatment of cervical esophageal carcinoma with laryngeal function preserved.

METHODSTwenty-four patients with cervical esophageal carcinoma were retrospectively reviewed. The esophagus was resected and substituted with 19 gastric pull-up and 5 colon interposition. Nineteen patients received radiotherapy postoperatively (dose 50 - 70 Gy).

RESULTSTwenty two patients were follow up over 3 years. The 3- and 5-year survival rates for T2 were 3 and 1, for T3, T4 8 and 3, respectively. The laryngeal function preservation rate was 77% (17/24) and the decannulation rate was 75% (12/16). The complication rate was 29%.

CONCLUSIONSurgical resection of cervical esophageal carcinoma with removal of the extraesophageal invaded tissues while preserving the laryngeal function is possible. The continuity of the esophagus is restored by stomach transposition and colon interposition. Combined with radiotherapy, the survival rate and life quality of the patient might be improved.

Adult ; Aged ; Esophageal Neoplasms ; mortality ; physiopathology ; surgery ; Esophagoplasty ; methods ; Female ; Follow-Up Studies ; Humans ; Larynx ; physiopathology ; Male ; Middle Aged ; Quality of Life ; Survival Rate ; Thoracotomy

OBJECTIVETo evaluate the mechanism of increased invasion and migration of hepatocellular carcinoma (HCC) cells induced by vascular endothelial growth factor receptor-1 (VEGFR-1) activation.

METHODSVascular endothelial growth factor-B (VEGF-B) was used to induce and stimulate hepatocellular carcinoma cell line MHCC97-H. Morphologic changes of MHCC97-H were investigated. The expression of E-cadherin and alpha-catenin (two epithelial markers) and Vimentin and N-cadherin (two mesenchymal markers) was detected by reverse transcriptase polymerase chain reaction (RT- PCR), western blotting, and immunofluorescence staining. Cell invasion and migration test was performed.

RESULTSTreatment of MHCC97-H cells with VEGF-B led to morphologic changes characteristic of epithelial to mesenchymal transition (EMT), including loss of polarity, increased intercellular separation, and the presence of pseudopodia. Expression of the epithelial adhesion molecules, including E-cadherin and alpha-catenin, was decreased after VEGF-B treatment. Conversely, an increase in the expression of the mesenchymal cell markers, including N-cadherin and vimentin, was observed after VEGF-B treatment (P less than 0.05). VEGF-B-treated cells exhibited a change in E-cadherin from an organized, membrane-bound structure to a disorganized state in which it was noted to be dispersed throughout the cytoplasm. Pretreatment with VEGFR-1 blocking antibody 18F1 inhibited the change in localization of E-cadherin induced by VEGF-B treatment. The ability of invasion and migration of MHCC97-H was enhanced by VEGF-B reatment (P less alpha 0.05).

CONCLUSIONIncreased invasion and migration of HCC cells induced by VEGFR-1 activation was mediated by epithelial to mesenchymal transition.

Carcinoma, Hepatocellular ; Cell Line, Tumor ; Epithelial-Mesenchymal Transition ; Humans ; Liver Neoplasms ; Vascular Endothelial Growth Factor A ; metabolism

The regulation of foreign gene expression in Insect-Baculovirus Expression System is very complex. In this report, the effect of 5'-UTR in the expression of hGH gene in cultured Sf9 cells was examined. A 18 bp length in the end of 5'-UTR of hGH (human Growth Hormone, hGH) cDNA including a stem-loop structure was deleted by PCR. The truncated hGH cDNA, delta 1hGH was cloned in pFastBac1, named pFast-Bac-delta 1hGH. After transforming into E. coli. DH10Bac, which have a shuttle vetor-Bacmid, the delta 1hGH was integrated into Bacmid by site-specific transposition, and an expression vector, rBacmid-delta 1hGH DNA was acquired. By transfecting the cultured Sf9 cells with the recombinant expression vector DNA, pure recombinant virus, rAcV-Bac-delta 1hGH was obtained, and hGH gene was expressed. Immuno-blot and Chemiluminescent assay revealed that the expressed hGH had normal immunological activity, the amount of hGH expression level in Sf9 cell supernatant infected with rAcV-Bac-delta 1hGH containing the truncated 5'UTR was four to five times higher than that infected with rAcV-Bac-hGH.
5' Untranslated Regions ; genetics ; Animals ; Base Sequence ; Cells, Cultured ; DNA, Complementary ; genetics ; Gene Expression Regulation ; Genetic Vectors ; genetics ; Human Growth Hormone ; genetics ; metabolism ; Humans ; Immunoblotting ; Insecta ; cytology ; genetics ; Recombinant Proteins ; isolation & purification ; metabolism

OBJECTIVETo analyze the magnetic resonance imaging (MRI) findings of radiation-induced liver injury following three-dimensional conformal radiotherapy.

METHODSA retrospective review of the MRI data was conducted in 20 patients treated between September 2000 and October 2005, who suffered liver injuries induced by 1 or 2 three-dimensional conformal radiotherapy sessions for liver neoplasm. The patients underwent MR scans with T2-weighted sequences and T1-weighted sequences in both plain and Gd-DTPA enhanced MRI. Four patients with suspected tumor relapse suggested by MRI were pathologically confirmed to have radiation-induced liver injury.

RESULTSAcute radiation-induced liver injury was represented by large patches of liver edema consistent with the irradiation volume, showing low signal intensity on T1-weighted images (T1WI) and high signal intensity on T2-weighted images (T2WI) without arterial phase enhancement after Gd-DTPA injection. Delayed radiation-induced liver injury was manifested by slightly low-intensity signal on plain T1WI and slightly high-intensity signal on T2WI without obvious arterial phase enhancement following Gd-DTPA injection but with marked enhancement during the portal-venous and delayed phases.

CONCLUSIONRadiation-induced liver injury presents characteristic MRI features, and plain and dynamic enhanced MRI can be of great value for its diagnosis.

Adolescent ; Adult ; Aged ; Female ; Humans ; Liver Diseases ; diagnosis ; etiology ; Liver Neoplasms ; pathology ; radiotherapy ; Magnetic Resonance Imaging ; methods ; Male ; Middle Aged ; Radiation Injuries ; diagnosis ; pathology ; Radiotherapy Dosage ; Radiotherapy, Conformal ; adverse effects ; methods ; Sensitivity and Specificity

OBJECTIVETo study the feasibility and influence of vagus nerve preservation in radical operation for proximal gastric cancer.

METHODSThirty-two patients with early or T2 cardia cancer from May 2007 to May 2009 were enrolled and randomized into two groups, i.e. vagus nerve preservation group(n=16) and control group(n=16). Two groups were compared with regard to operative time, anastomotic fistula, digestive discomforts, body weight, survival rate, findings on gastroscope and abdominal ultrasonography.

RESULTSThere were no statistically significant differences between the two groups in operative time (2.8 vs. 2.5 h), postoperative complications rate (25.0% vs. 31.3%). No recurrence or mortality was observed after one-year follow-up. However, patients who underwent vagus nerve preservation had less postprandial discomforts(3 vs. 12 cases), bile reflux(3 vs. 10 cases), atrophic gastritis(1 vs. 9 cases), gallstones(1 vs. 8 cases), body mass index, and diarrhea(P<0.05).

CONCLUSIONFor patients with early gastric cancer, preservation of the vagus nerve during radical gastrectomy results in less complications and does not compromise patient survival.

Adult ; Aged ; Cardia ; Female ; Follow-Up Studies ; Humans ; Male ; Middle Aged ; Prospective Studies ; Stomach Neoplasms ; surgery ; Vagus Nerve ; surgery

OBJECTIVETo report two cases of glandular odontogenic cyst and examine its cytokeratin 18,19 expression.

METHODSTwo cases of glandular odontogenic cyst were reported and studied. The cytokeratin 18, 19 expression in these two cases were also investigated using immuno-histochemical staining as well as in the situ hybridization of the cyst epithelium.

RESULTSHisto-pathological examination revealed that ciliated columnar cells, squamous cells and low-columnar cells were found in the superficial layer of the lining epithelium. Several minor salivary glands, mainly composed of seromucous cells were observed near the satellite cyst. CK18 were expressed in all layers of the lining epithelium of varying intensity. CK18 was negative in lining epithelium of the daughter cyst, but CK19 was positive. CK18-mRNA was expressed in all the layers of the lining epithelium, the salivary glands and daughter cysts.

CONCLUSIONSHistological features and CK18 expression may be indicative of the possibility of salivary glandular and odontogenic differentiation.

Adolescent ; Adult ; Epithelium ; pathology ; Female ; Humans ; Keratin-18 ; metabolism ; Keratin-19 ; metabolism ; Male ; Odontogenic Cysts ; metabolism ; pathology

OBJECTIVETo examine cytokeratin 18(CK18) and it's gene in jaw odontogenic keratocyst (OKC) epithelial lining.

METHODSThe epithelial linings of 32 cases were subject to monoclonal antibody immunohistochemical staining for CK18, CK8 and CK19. RT-PCR and in situ hybridization for CK18 mRNA were conducted in 12 of 32 cases in keratocyst epithelial cell linings.

RESULTSIn 17 cases, CK18 were observed in keratinized surface layers, though weakly positive. In 27 cases, CK18 were positive in the granular cell layers. CK18 were also positive in the spinous cell layers in 14 cases. In all cases, CK18 was negative in basal cell layers. By RT-PCR, 4 cases expressed CK18 strongly, 8 cases weakly. By in situ hybridization, 8 cases expressed CK18 mRNA positively in both spinous and granular cell layers, and 4 cases positively in basal and keratinized cell layers. CK8 were expressed in basal cell layers of keratocyst epithelial linings. In 23 cases, CK19 were expressed in surface cell layers of keratocyst epithelial linings.

CONCLUSIONThe expression of CK18 in keratocyst epithelial linings transfers from basal cell layer to spinous layer. The expression of CK18 immunohistochemical staining and CK18 mRNA in situ hybridization are different, which shows CK18 might be related to proliferation of OKC epithelial linings. That suggests the existence of regulation of CK18 and CK18 mRNA expression.

Epithelial Cells ; Humans ; In Situ Hybridization ; Keratin-18 ; Keratins ; Odontogenic Cysts ; RNA, Messenger

BACKGROUND:The thickening of living bone is an important natural rule,and genetic,nutritional and endocrine factors play critical roles in the bone thickening;however,these factors are site-blind.OBJECTIVE:To analyze the mechanism underlying the thickening of the long bone.METHODS:Clinical cases and literature were analyzed.Medline and CNKI databases were retrieved using the keywords of "bone growth in width,skeletal thickening,bone thickening,periosteal apposition" in English and Chinese,respectively.Totally 12 eligible articles were included for result analysis.RESULTS AND CONCLUSION:The mechanical environment of the bone plays a key role in the bone remodeling,which is a site-specific process.The thickening of the long bone is completed through the periosteal apposition,and the coupling effect of stress-angiogenesis-osteogenesis induced by overloading is the pathological basis of bone thickening.The periosteal apposition and periosteal resorption belong to a lifelong dynamic process,and the bending stress is the most important factor to maintain the periosteal osteogenesis.If the bone is shielded from bending stress to a certain extent by the metal fixators,it may lead to bone resorption and thinning,nonunion and other serious consequences.Therefore,the strength of the fixators should match the patient body mass and the thickness of the bone.The marrow cavity is a natural low stress region,so intramedullary fixation theoretically has little effect on the width growth of bone.