In recent years, with the discovery of neural stem cells in the adult nervous system, as well as the continuous research of stem cells, the applications of stem cells in the treatment of ischemic stroke have drawn a broad attention of academicians.A great number of experimental studies have shown that stem cells can improve the post-stroke neurological function to some extent.This indicate a good prospect for clinical application.At present, researches related to the treatment of ischemic stroke with stem cells concentrate mainly on two ways.The first is to treat ischemic stroke through the activating of endogenous neural stem cells, and the second is to treat ischemic stroke through the transplantation of exogenous neural stem cells.This study is designed to review the present research status of the application of various stem cells for the treatment of ischemic stroke in animals and clinical studies, and to analyze existing problems and uncertainties.

OBJECTIVE To exlpore the clinical features and countermeasures of nosocomial infections in cardiovascular patients.METHODS The infection incidence,infection sites,high-risk factors and impacts on prognosis were recorded and analyzed in a retrospective way.RESULTS Nosocomial infection incidence was 10.1% within which respiratory system infection taken the first place;patients over 60 ages and staying in hospital over 30 days,with underlying diseases,chronic heart failure,invasive operation etc were the high-risk factors;the mortality of the infected group was higher than the non-infected group.CONCLUSIONS The infection incidence in cardiovascular patients is related to various factors,with bad prognosis;we need to avoid the high-risk fators based on the active treatment for primary disease,in this way to prevent and control the occurrence of nosocomial infection.

OBJECTIVE: To evaluate the influence of drinking on hearing loss of pilot students, especially on high frequency hearing loss. METHOD: According to whether drinking, 517 male pilot students were divided into two groups. The balance of all the factors in addition to drinking in both groups was compared. All the students were examined by pure tone audiometry. The statistical data of this research was processed based on a retrospective cohort study. RESULT: The damage of high frequency (4-8 kHz) auditory threshold in left and right ear in drinking group were obviously higher compared with control group (P < 0.01). The Morbidity of hearing loss in drinking group was significantly higher compared to control group (χ2 =16.620, P < 0.01). CONCLUSION Drinking is associated with the hearing loss in pilot students and particularly affects the hearing of high frequency spectrum.
Alcohol Drinking ; adverse effects ; Audiometry, Pure-Tone ; Auditory Threshold ; Cohort Studies ; Deafness ; Ear ; Hearing ; Hearing Loss ; Hearing Loss, High-Frequency ; Hearing Tests ; Humans ; Male ; Retrospective Studies ; Students

Objective To identify the role of microRNA-17(miR-17)in human glioma U87 cells invasion which may regulate expression of matriv metalloproteinase(MMP)-2.Methods U87 cells were cultured in vitro,while changes in cellular morphology were observed by phase contrast microscope.The miR-17 which might regulate the expression of MMP-2 was predicted by bioinformatics and identified using dual luciferase report system.Expressions of miR-17 and MMP-2 were determined using real-time PCR and Western blot after transfection of miR-17 mimics.The invasion of U87 cells was detected in vitro by Transwell chamber.Results Expression of MMP-2 was positive by immunofluorescence cytochemistry. Using dual luciferase reporter system,miR-17 could inhibit the expression of MMP-2 by binding to its mRNA 3′UTR. Results of real-time PCR and Western blot showed that over-expression of miR-17 down-regulated expression of MMP-2. The invasion of U87 cells was suppressed by over-expression of miR-17.Conclusion MiR-17 may negatively regulate expression of MMP-2 in human glioma U87 cells and inhibit cell invasion.

Developed the information centralization and management integration system for monitors of different brands and models with wireless sensor network technologies such as wireless location and wireless communication, based on the existing wireless network. With adaptive implementation and low cost, the system which possesses the advantages of real-time, efficiency and elaboration is able to collect status and data of the monitors, locate the monitors, and provide services with web server, video server and locating server via local network. Using an intranet computer, the clinical and device management staffs can access the status and parameters of monitors. Applications of this system provide convenience and save human resource for clinical departments, as well as promote the efficiency, accuracy and elaboration for the device management. The successful achievement of this system provides solution for integrated and elaborated management of the mobile devices including ventilator and infusion pump.
Computer Communication Networks ; Computers ; Internet ; Wireless Technology

Objective To explore the relationship between temperature and change of serum electrolytes (potassium, natrium, chlorine,and calcium) in patients with spinal cord injury. Methods 321 patients with spinal cord injury (SCI) following fever were regarded as observation group, while 313 SCI patients in normal temperature as control group. The level of serum electrolytes (potassium, natrium, chlorine, and calcium) in both groups was analyzed. Results There was no significant difference in the level of serum potassium (P>0.05), but was in the serum natrium, chlorine, and calcium (P<0.05) between 2 groups. The level of serum potassium didn't correlated with their temperature, and the level of serum natrium, chlorine, and calcium correlated with the temperature negatively. Conclusion The level of serum natrium, chlorine, and calcium may decrease in SCI patients following fever while the level of serum natrium is unchanged.

Objective To analyze the difference of prescription dose between ICRU report 83 and Chinese recommendation in the nasopharyngeal carcinoma (NPC) for intensity modulated radiation therapy (IMRT).Methods Eighty-four NPC were treated using IMRT technology from Jan 1,2010 to Apr 1,2012.All dose volume histogram of the 84 IMRT plan were analyzed retrospectively.The target volumes of planning gross tumor volume of nasopharynx (PGTVnx) or planning clinical target volume and high risk lymphatic drainage (PCTV1) and doses of D100,D98,D95,D50,D2 and D0 were recorded.The mean,standard error,medial,range,coefficient of variation (CV) of PGTVnx,PCTV1,and D100,D98,D95,D50,D2and D0 were calculated,respectively.The homogeneity index (HI) and deviation between D95 and D50 of PGTVnx and PCTV1 were calculated,respectively.The differentiation of grouping results were analyzed with grouped t-test method.Results The HI of PGTVnx and PCTV1 were 0.118 ± 0.045 and 0.272 ± 0.037,respectively.It is the bigger target volume,the worse HI;and the advanced T stage,the worse HI.Either PGTVnx or PCTV1,D95 were less than D50.The average deviation was-5.15％ and-10.97％,and the actual difference value was (382± 180) cGy (P=0.000) and (741± 140) cGy (P=0.000).Conclusions D550,which is the recommendation prescription dose of PTV in ICRU report 83,could evaluate accurately the IMRT plan with combining D98 and D2· When D50 is used to instand of D95,the prescription dose of PGTVnx and PCTV1 should increase 5％ and 11％,respectively.

Objective To study the accuracy of SentinelTM system for patient setup using rigid-body phantom.Methods A 002LFC IMRT phantom was placed on Elekta HexaPODTM 6-degree couch using tattoo and the laser in the treatment room.When a well-know shift (3 directions) and rotation (3 positions) was moved,CBCT and SentinelTM system were scanned respectively,and the measuring errors of six dimensions were recorded.The absolute differences between applied and measured errors were compared and paired t-test.Results Total 15 well-know shifts were investigated.The SentinelTM system was very good stability and the largest absolute difference only 0.9 mm (z direction) and 0.2° (arbitrary direction).At the same time,a good conformance between SentinelTM system and CBCT was displayed because the largest absolute difference between applied and measuring error was less than 0.9 mm (z direction) and 0.2° (arbitrary direction).Conclusions SentinelTM system is fast,simple,non-invasive and seems to be reliable in detecting patient setup errors.It maybe hold potential to ensure precise patient positioning with reduced CBCT frequency in tumor locations with fixed relation to surface structures.

Objective To investigate the associated effect of 125I implantation plus chemotherapy in local recurrent stage Ⅲ NSCLC patients.Methods From January 2006 to January 2009,34 patients documented with local recurrent stage Ⅲ NSCLC were divided into two groups by random number table.The treatment group was treated with 125I permanent implantation combined with DP regimen (docetaxel 60 mg/m2 + cisplatinum 75 mg/m2),while the control group received only DP chemotherapy.According to the TPS,the treatment group received CT-guided percutaneous implantation of 125 I seeds with a particle activity of 2.22 ×107-2.59 × 107 Bq.The prescribed dose was in the range of 90-110 Gy and the postoperatively matched peripheral dose (mPD) and D9o were verified by TPS.The control group received a DP chemotherapy regime for 4 cycles after the procedure.This study was approved by the ethics committee,and all patients signed informed consents.The follow up time was up to disease progression.Kaplan-Meier survival analysis was used to describe the local lesion control (LLC) time and progression free survival (PFS).Log-rank test was used in the comparison of the survival rates between the two groups.Fisher's exact test was used to analyze the differences of CR rate and recent efficiency between two groups.Results In the treatment group,postoperative mPD was 93.9-130.4 (M 116.7) Gy,and D90 was 103.6-148.2 (M 130.6) Gy.The LLC time was 4.7 to 24.0 months with a median of 11.6 (95％ CI:8.7-14.6) months.In two cases,there was no recurrence during the follow-up time of 24 months.PFS was 4.7 to 24.0 months with a median of 10.5 (95％ CI:7.4-13.6) months.The recent effective rate of the treatment group was 64.7％ (11/17).CR,PR,SD and PD were 41.2％ (7/17),23.5％ (4/17),23.5％ (4/17) and 11.8％ (2/17),respectively.In the control group,the LLC time was 4.5 to 11.4 months with a median of 7.5 (95 ％ CI:6.7-8.3) months,and the median of PFS was 6.5 (4.5-10.5) (95％ CI:5.7-8.3) months.The response rate,CR,PR,SD and PD were 41.2％ (7/17),5.9％ (1/17),35.3％ (6/17),35.3 ％ (6/17) and 23.5％ (4/17),respectively.There was no statistical significance of the recent effective rate between the treatment group and control group (P =0.30),but the LLC time (x2 =8.40,P ＜ 0.01),the median of PFS time (x2 =6.27,P ＜ 0.05) and CR (P =0.04) of the treatment group were all significantly higher than those of the control group.Concltusion The implantation of 125I seeds combined with chemotherapy for recurring stage Ⅲ NSCLC patients is safe and effective,and its efficacy is superior to the second line chemotherapy alone.

Background and purpose:Multiple microRNAs (miRNAs) are abnormally expressed in breast cancer and play an important role in the regulation of breast cancer. miRNAs may be a new target for the treatment of breast cancer. This study aimed to investigate the expression of miR-199a-3p in breast cancer and the effect of miR-199a-3p on proliferation and apoptosis of breast cancer.Methods:Real-time PCR was used to test the expression of miR-199a-3p in breast cancer tissues, normal breast tissues, breast cancer cells and normal breast cells. Overexpression (or silencing the expression) of miR-199a-3p was conducted by transfecting MDA-MB-231 with miR-199a-3p mimics (or inhibitors). The proliferation of MDA-MB-231 was detected by MTT method. The apoptosis of MDA-MB-231 was investigated by Hoechst staining and caspase-3 activity assay kit.Results:Compared to corresponding non-tumor breast tissues (or normal breast cell HBL-100), lower levels of miR-199a-3p were expressed in breast cancer tissues or breast cancer cells. Overexpression of miR-199a-3p induced by miR-199a-3p mimic inhibited the proliferation and promoted the apoptosis of MDA-MB-231, while silencing the expression of miR-199a-3p induced by miR-199a-3p in-hibitor increased the proliferation and suppressed the apoptosis of MDA-MB-231.Conclusion:The expression of miR-199a-3p is lower in breast cancer, which shows its tumor suppression effect by regulating the proliferation and apoptosis of breast cancer cells.