Hypoxia-inducible factor-1 (HIF-1) is an inportant regulatory factor in adapting to hypoxia in the hypoxic environment for cells.The changes of the numbers of HIF-1 in cells may regulate hypoxia-responsive gene transcription.HIF-1 may inhibit neuronal apoptosis and thus play a ncuroptotective role,and may also show a neurotoxic effect by inducing neuronal apoptosis.

Hypoxia-inducible factor(HIF)is a pivotal transcription factor for hypoxic response.This article reviews the related characteristics of HIF-1 and its target genes vascular endothelial growth factor and the neuroprotective mechanisrms in cerebral ischemia.

BACKGROUND: Studies have demonstrated that trehalose possesses protective effects on cyropreserved sternum. But the mechanism of action remains poorly understood. OBJECTIVE: To investigate the effects of trehalose on bcl-2 and bax mRNA expression in cryopreserved sternum. METHODS: Four groups of freshly prepared solution were used: low-potassium dextran (LPD), LPD + dimethyl sulfoxide (DMSO), LPD + trehalose, LPD + DMSO + trehalose. Rat sternum was cut and then immediately cryopreserved in the tubes containing each group of solution. Fresh rat sternum tissue and 4 groups of samples cryopreserved for 120 days were taken and bcl-2 and bax mRNA expression in fresh and cryopreserved sternum was detected using reverse transcription-polymerase chain reaction.RESULTS AND CONCLUSION: bcl-2 mRNA expression in the LPD + trehalose group was significantly higher, but bax mRNA expression was significantly lower, than in the LPD, LPD + DMSO groups (both P < 0.01). LPD + DMSO + trehalose group showed highest bcl-2 mRNA expression and lowest bax mRNA expression, which were basically similar to fresh bone tissue (P > 0.05). These findings indicate that trehalose may protect cell activity in cryopreserved sternum by enhancing bcl-2 mRNA expression and inhibiting bax mRNA expression, and trehalose together with DMSO shows better protective effects.

Objective We aimed to systematically review the effect of Comfeel transparent dressing for preventing PICC-associated phlebitis.Methods We electronically searched in China National Knowledge Infrastructure (CNKI),Chinese Science Technology Periodical Databases (VIP),Wanfang Database,China Biology Medicine Disc (CBM),PubMed and Embase for studies about effect of Comfeel transparent dressing for preventing PICC-associated phlebitis from inception to June 2014.Literature was screened and evaluated by inclusion and exclusion criterion.The RevMan 5.1 software was used for Meta-analysis.Results This study included 7 RCTs involving 524 patients.Meta analysis showed that compared with the 3M occlusive dressing,Comfeel transparent dressing could significantly decrease the incidence of PICC-associated phlebitis,OR=0.17,95％CI (0.08,0.34),Z=4.95,P＜0.01.Conclusions Comfeel plus transparent dressing can prevent the incidence of PICC-associated phlebitis.

Objective To evaluate the effect of Xingqi Tongfu Pad on the intestinal functions of children with acute abdomen after surgery. Methods The random digit table was used to randomize 146 patients with acute abdomen into treatment group (n=71) and control group (n=75) according to their registration number. In the control group, the patients only received normal treatment and nursing, while those in the treatment group received Xingqi Tongfu Pad for the acupoint application in addition to routine treatments. The two groups were compared in terms of the time of bowel sound recovery , the exhaust defecation time and gastrointestinal dysfunction score. Results The bowel sounds and the first exhaust and defecation in the treatment group appeared obviously earlier than those in the control group . The score on gastrointestinal dysfunction in the treated group was significantly higher than that of the control group (P<0.05). Conclusions Xingqi Tongfu Pad can promote the recovery of gastrointestinal function after abdominal operation. It deserves popularization for its positive effect, cheap price and easy operation.

Objective To investigate the risk factors of early postoperative complications in patients undergoing pancreaticoduodenectomy. MethodsClinical data of 200 patients undergoing pancreaticoduodenectomy in our hospital from December 1999 to September 2002 were collected and analyzed retrospectively. Nine clinical factors were recruited for the study in relation to surgical complications. ResultsThe overall early postoperative complication rate was 21% (42/200). Logistic regression analysis revealed that no T tube drainage(OR=10.015), preoperative total serum bilirubin level over 171.1?mol/L(OR=7.756), preoperative diabetes (OR=4.086), end-to-end pancreaticojejunostomy (OR=2.616), intraoperative blood transfusion over 1000 ml (OR=2.410), over 65 years old (OR=2.162) were important factors for early complications. ConclusionsT tube drainage, end-to-side mucosa-to-mucosa pancreaticojejunostomy and good surgical expertise can decrease early morbidity rate.

OBJECTIVE Evaluation of imaging navigation system during endoscopic sinus surgury and compared endoscopic sinus surgery with and without image guidance, analyzing a number of parameters that can impact on efficacy. METHODS Retrospective review of 76 imaging-navigated endoscopic sinus surgery with image-guidance systems at our department between Jan 2000 and May 2003, including 20 consecutive pituitary adenoma patients and 10 nasal-sinus ossifying fibroma. The control group consisted of 10 nasal-sinus ossifying fibroma patients between Jan 1997 and May 2003 and 20 consecutive pituitary adenoma patients between Jan 1999 and May 2003 who underwent ESS without image guidance. The main outcomes measured were analysis of the using times of different diseases, the user's satisfication in different diseases, and compared pituitary adenoma/ossifying fibroma ESS with and without image guidance. RESULTS The using times of different diseases are different, the user feel satisfication in all cases but the degree is different with diseases. The patient's characterisitics of the two groups of pituitary adenoma/ossifying fibroma were similar in age and gendle. There are no statistically significant differences in estimated blood loss, operative time, anesthesia time. CONCLUSION Imaging navigation systems in different nasal-sinus diseases are all useful. Our experience illustrates the importance of the learning curve, we believe that the problems we had with those systems were largely operator-dependent and that these can be overcome with proper experience and training. For small group patients, it's no evidence to show in ESS can make more complete resection of nasal-sinus ossifying fibroma, but has evidence to show no more cost.

Objective To investigate the clinical characteristics of families with Huntington disease in Sichuan, and to make genetic diagnosis and pedigree analysis, and to provide genetic counseling for family members. Methods The detailed clinical data of Huntington disease patients and some family members who visited were collected from provincial people's Hospital of Sichuan between March 2016 and March 2018. The CAG trinucleotide repeats of IT15 gene were examined. The mini mental state examination (MMSE), Montreal cognitive scale (MoCA) were used to evaluate the cognitive function. Hamilton anxiety scale (HAMA), Hamilton Depression scale (HAMD) were used to evaluate the emotion. Activities of daily living scale (ADL) were used to evaluate the ability of daily life. Results Genetic test was conducted on twenty-four individuals from 4 families. Genetic test detected eight HD patients with 41-54 CAG repeats (46.75±4.03) and seven presymptomatic patients with 43~58 CAG repeats (50.00 ±6.40). Four of HD patients required genetic counseling for marriage and childbearing. The number of normal CAG repeats was 12~24, with 17 and 20 being the most common. Correlation analysis found that the number of CAG repeats was negatively correlated with the age of onset (r=-0.967, P＜0.01). ADL score was positively correlated with course of disease (r=0.842, P＜0.01), and negatively correlated with MMSE score (r=-0.930, P＜0.01) and MoCA score (r=-0.932, P＜0.01). Conclusion Genetic test is of great significance in the diagnosis of Huntington's disease, especially in patients with negative family history. The number of CAG repeats is increase from generation to generation and there is genetic anticipation in HD families. The number of CAG repeats can predict the onset age to some extent. Genetic counseling and prenatal diagnosis are important to avoid the birth of a child with HD.

OBJECTIVETo investigate the relationship between acute graft rejection early after renal transplantation and the variations of platelet parameters.

METHODSWe retrospectively analyzed the clinical data of 167 renal transplant recipients before and within 2 months after the surgery. Before and at 1-10 days, 15 days, 30 days, 45 days and 60 days after the transplantation, 5 platelet parameters, including platelet count (PLT), platelet hematocrit (PCT), mean platelet volume (MPV), platelet volume distribution width (PDW), and large platelet ratio (P-LCR), were detected in the 35 patients with acute graft rejection within two months (AR group) and in the other 132 recipients with good graft recovery (control group).

RESULTSThe AR group and control group showed no significant difference in PLT, PCT, MPV, or P-LCR before the surgery, but the PDW was significantly higher in the AR group (t=2.18, P=0.035). These parameters were similar within 5 postoperative days between the two groups (P>0.05), but in postoperative days 6-15, the AR group showed significantly increased MPV, PDW and P-LCR compared with the control group (P<0.05). In postoperative days 6-9, MPV, PDW and P-LCR became stable in AR group but tended to decrease in the control group, showing obviously different patterns of variation between the two groups (P<0.05).

CONCLUSIONSPreoperative PDW may have a positive correlation with acute graft rejection after renal transplantation. Monitoring the variations of MPV, PDW and P-LCR may help in the diagnosis of acute graft rejection early after renal transplantation.

Blood Platelets ; cytology ; Graft Rejection ; blood ; Hematologic Tests ; Humans ; Kidney Transplantation ; Platelet Count ; Retrospective Studies

OBJECTIVETo evaluate the advantages of image-guided system in transnasal endoscopic surgery.

METHODSTransnasal endoscopic surgery was performed with the aid of an image-guided system in 28 patients, supported with histopathologic diagnoses of chronic sinusitis with/without nasal polyps (10 cases), juvenile nasopharyngeal angiofibroma (4 cases), pituitary adenoma (6 cases), ethmoidal ossifying fibroma (3 cases), nasopharyngeal mixed tumor (2 cases), nasal leiomyoma (1 case), fungal sinusitis (1 case) and inverted nasal papilloma (1 case).

RESULTSFor all the patients, the time periods from initialization to surgery ranged from 15 to 30 minutes (a mean of 26 minutes). The calibration coefficient ranged from 1.3 to 2.0. Accuracy of localization fell within 1 mm. Compared with traditional endoscopic surgery, operation times were not noticeably different. No complications occurred.

CONCLUSIONSThe image-guided system was able to identify borders and critical anatomical structures in real-time, especially of those with distorted anatomical markers. It provided a powerful means for a safer and less invasive endoscopic sinus surgery.

Adolescent ; Adult ; Aged ; Child ; Endoscopy ; methods ; Female ; Humans ; Male ; Middle Aged ; Nose ; Surgery, Computer-Assisted