Objective To study the relationship of implicit memory and amnesia effect of oral midazolarn premedication and toobserve its anterograde amnesia, the effect on short-term memory and the onset time and out come of retrograde amnesia. Methods60 patients with ASA I - Ⅱ status undergoing abdomen and limb operations were divided into 3 groups with 20 cases each. Group A:oral midazolam 7.5mg;Group B:oral 15mg;Group C:placebo. The patients received combined spinal-epidural anesthesia after oral midazolam. The parameterns of EEG, SEF 95 %, BISwere collected at the same time and the degree and remark of sedation were dome according to OAA/S. The amnesia and implicit memory were investigated with pictures and muddy identified hearing rate 6 hours after operation. Results (1)Twenty min following drug ad dministration the remarks of sedation of group A and B were significantly loWver than that before and that of group C, Which was not significently different between group A and B. ( 2)The amnesia rates tested six hrs after surgery were significantly higher at 30min in group A, 20min in group B than those before treatment and were kept at 70%-80% levels, which in group C was remained zero. (3)The muddy identified hearing rate was not different significantly, among the three groups. (4) The short-term memory was all 100%during the period of drug action. (5)BIS and SEF 95% Were lower 30min after the treatment and all kept at 80 Hz and 20 Hz, which were not different remarkably between group A and B. ConclnsionOral midazolam 7. 5mg has a good effect on anterograde amnesia 30min after treatment, which may not be improved with increament in dosage. It does not lead to retrograde amnesia. The long-term memory, but not short-term memory, was impaired by midazolam. It only affects the explicit memory. Oral premnedication with midazolam can not prevent the awareness during operation totally.

OBJECTIVETo analyze causes of missed diagnosis of hiding post-malleolar fractures in treating ankle joint fractures of pronation-external rotation type according to Lauge-Hansen classification and assess its medium-term outcomes.

METHODSAmong 103 patients with ankle joint fracture of pronation-external rotation type treated from March 2002 to June 2010,9 patients were missed diagnosis,including 6 males and 3 females,with a mean age of 35.2 years old (ranged, 18 to 55 years old) . Four patients were diagnosed during operation, 2 patients were diagnosed 2 or 3 days after first surgery and 3 patients came from other hospital. All the patients were treated remedially with lag screws and lock plates internal fixation. After operation,ankle joint function was evaluated according to American Orthopaedic Foot and Ankle Society (AOFAS).

RESULTSAll the 9 patients were followed up, and the duration ranged from 14 to 30 months (averaged, 17 months). No incision infection was found, and all incision healed at the first stage. At the latest follow-up, AOFAS was 83.0 +/- 4.4, the score of 4 patients diagnosed during operation was 85.0 +/- 2.9, and the score of 5 patients treated by secondary operation was 81.0 +/- 5.3. All the patients got fracture union observed by X-ray at a mean time of 2.2 months after operation. There were no complications such as internal fixation loosing, broken and vascular or nerve injuries.

CONCLUSIONAnkle joint fracture of pronation-external rotation type may be combined with hiding post-malleolar fractures. So to patients with ankle joint fracture of pronation-external rotation type, lateral X-ray should be read carefully, and if necessary, CT or MRI examination should be performed. If adding lateral X-ray examination after reduction of exterior and interior ankle joint fixation, the missed diagnosis may be avoided.

Adolescent ; Adult ; Ankle Fractures ; False Negative Reactions ; Female ; Fractures, Bone ; diagnosis ; diagnostic imaging ; physiopathology ; surgery ; Humans ; Male ; Middle Aged ; Pronation ; Rotation ; Tomography, X-Ray Computed ; Treatment Outcome ; Young Adult

OBJECTIVEType 2 diabetes has been recently recognized as an important risk factor for cognitive decline of patients with Alzheimer's disease (AD). But the roles of hyperinsulinemia (HI) and insulin resistance (IR) in the development of AD are still controversial. This study was designed to evaluate whether HI or IR influenced the cognitive functions of older cohort.

METHODSThe cognitive functions of 328 consecutive elderly patients were evaluated with a battery of cognitive rating scales. Their fasting blood glucose (FBG) and fasting insulin (FINS) were analyzed and IR was calculated with modified-Homa. The cognitive scores in different groups and the correlation of cognitive functions with HI or IR were analyzed.

RESULTSIn our study, there were 180 participants with HI and 148 without HI, and 192 with IR and 136 without IR. The participants with HI showed worse cognitive functions than those without HI in MMSE, MOCA, CDR, orientation, delayed memory, and attention/calculation domains. Similarly, the elderly with IR had lower cognitive scores than those without IR in MMSE, MOCA, CDR, GDS, orientation, delayed memory, and attention/calculation domains. The insulin levels and Homa IR had negative correlation with the scores of MMSE and delayed memory, not only in the model 1 adjusted for FBG and diabetes history, but also in the model 2 adjusted for all nine demographic characteristics.

CONCLUSIONHI and IR are important risk factors for cognitive decline of the elderly, especially for the dysfunctions in delayed memory domains.

Aged ; Aged, 80 and over ; Cognition ; Cognition Disorders ; blood ; etiology ; Female ; Homeostasis ; Humans ; Hyperinsulinism ; blood ; complications ; psychology ; Insulin ; blood ; Insulin Resistance ; Male

OBJECTIVEThe association of metabolic syndrome (MetS) with cardiovascular diseases (CVD) has not been adequately explored in middle-aged and elderly Chinese. This study aimed to investigate MetS' prevalence and its impact on the CVD incidence in this specific population group.

METHODSA data set of a community-based prospective cohort study was analyzed. A total of 2300 subjects aged 40-94 years were followed up for the CVD events. MetS defined according to the JCDCG criteria was assessed at baseline, and the middle-aged and elderly groups were classified by the WHO definition.

RESULTSAs compared with the middle-aged group, the prevalence of MetS increased by 0.6 times (34.6% vs. 21.3%) and the incidence density of CVD increased by 4.9 times in the elderly group (52.3/1000 person-year vs. 8.9/1000 person-year). Furthermore, the multivariate Cox regression revealed that the risk to CVD incidence was independently related to increased waist circumference in the middle-aged group (HR=2.23, P<0.01) and to elevated blood glucose in the elderly group (HR=1.39, P<0.01).

CONCLUSIONMetS was highly prevalent in middle-aged and elderly Chinese. MetS significantly increased the risk to CVD incidence in the elderly. All individuals with metabolic disorders should receive active clinical care to reduce the incidence of CVD.

Adult ; Aged ; Aged, 80 and over ; Cardiovascular Diseases ; epidemiology ; etiology ; China ; epidemiology ; Female ; Humans ; Incidence ; Male ; Metabolic Syndrome ; complications ; epidemiology ; Middle Aged ; Prevalence ; Proportional Hazards Models

Our study aims to explore the effects of lentivirus-mediated microRNA-124 (miR-124) gene-modified bone marrow mesenchymal stem cell (BMSC) transplantation on the repair of spinal cord injury (SCI) in rats. BMSCs were isolated from the bone marrow of rats. The target gene miR-124 was identified using a luciferase-reporter gene assay. Seventy-two rats were selected for construction of the SCI model, and the rats were randomly divided into the blank group, sham group, SCI group, negative control (NC) group, overexpressed miR-124 group and si-PDXK group. The mRNA expression of miR-124 and the mRNA and protein expression of pyridoxal kinase (PDXK) were detected by quantitative real-time polymerase chain reaction and western blotting. The locomotor capacity of the rats was evaluated using the Basso, Beattie and Bresnahan (BBB) scale. Brdu, neuron-specific enolase (NSE), neurofilament (NF) and microtubule-associated protein 2 (MAP2) were detected using immunohistochemistry. The expression levels of thyrotropin-releasing hormone (TRH), prostacyclin (PGI2) and gangliosides (GM) were measured using an enzyme-linked immunosorbent assay. PDXK was identified as the target gene of miR-124. The overexpressed miR-124 group exhibited higher miR-124 expression than the SCI, NC and si-PDXK groups. Compared with the SCI and NC groups, the PDXK expression was downregulated in the overexpressed miR-124 and si-PDXK groups, and the BBB scores were significantly increased 7, 21 and 35 days after transplantation. The double-labeled positive cell densities (Brdu+NSE/NF/MAP2) and the expression levels of TRH, PGI2 and GM in the overexpressed miR-124 group were significantly higher than those in the NC and SCI groups. These results indicated that miR-124 targeted PDXK to accelerate the differentiation of BMSCs into neurocytes and promote SCI repair.
Animals ; Blotting, Western ; Bone Marrow* ; Bromodeoxyuridine ; Cell Count ; Enzyme-Linked Immunosorbent Assay ; Epoprostenol ; Gangliosides ; Immunohistochemistry ; Intermediate Filaments ; Mesenchymal Stem Cell Transplantation* ; Mesenchymal Stromal Cells* ; Microtubule-Associated Proteins ; Phosphopyruvate Hydratase ; Pyridoxal Kinase ; Rats* ; Real-Time Polymerase Chain Reaction ; RNA, Messenger ; Spinal Cord Injuries* ; Spinal Cord* ; Thyrotropin-Releasing Hormone

OBJECTIVETo sort and identify side population (SP) cancer stem cells (CSC) in human prostate cancer (PCa) cell lines.

METHODSStem-like cells were isolated from five PCa cell lines Du145, IA8, LNCaP, TSU-Pr and PC-3 using FACS based on CD133+ CD44+ immunophenotype and SP in Hoechst staining. The in vitro growth pattern and tumorigenicity of SP stem cells were verified by soft agar colony-formation trial. LNCaP/SP cells were selected for further identification of stem cell properties using immunostaining, proliferation and invasion assay. Eventually, tumorigenicity and metastasis ability of LNCaP/SP were confirmed by xenograft experiments.

RESULTSThe percentages of CSCs of the CD133 CD44 + immunophenotype were extremely low in the five PCa cell lines. On the contrary, the percentages of the isolated SP cells were significantly higher in Du145 ([0.15 +/- 0.02]%), IA8 ([0.60 +/- 0.07 ]%), LNCaP ([0.8 +/- 0.1]%) and TSU-PrL ([2.0 +/- 0.4]%), but none was detected in PC-3. Besides, IA8/SP, LNCaP/SP and TSU-PrL/SP cells showed a significantly greater colony-forming efficiency than non-side population (NSP) cells (P < 0.05). Compared with LNCaP/NSP cells, LNCaP/SP cells exhibited high expressions of integrin alpha2, Nanog, CD44, OCT4 and ABCG2, remarkably enhanced invasive and proliferative potentials in vitro, and markedly increased tumorigenicity and metastasis (P < 0.01).

CONCLUSIONSP sorting is more suitable than CD133+ CD44+ selection for enriching CSCs from PCa cell lines, and LNCaP/ SP represents a typical CSC population.

Cell Line, Tumor ; cytology ; Cell Separation ; Humans ; Male ; Neoplastic Stem Cells ; cytology ; Prostatic Neoplasms ; Side-Population Cells ; cytology

BACKGROUNDRecent studies have shown that T helper type-2 (Th2) cells can induce the apoptosis of CD4+CD25+ Treg cells or resist the immunosuppressive effect of Treg cells. We hypothesize that an imbalance of Th2/Treg is present in patients with allergic asthma.

METHODSTwenty-two patients with mild asthma, 17 patients with moderate to severe asthma, and 20 healthy donors were enrolled. All patients were allergic to house dust mites. The proportion of peripheral blood CD4+CD25+ Treg cells and Th2 cells were determined by flow cytometry. The concentration of interleukin (IL)-10, transforming growth factor (TGF)-β and IL-4 in plasma was determined by enzyme linked immunosorbent assay. In these subjects, peripheral blood mononuclear cells from 17 mild asthmatic patients, 13 moderate to severe asthmatic patients and 14 healthy donors were acquired and expression of forkhead box P3 (Foxp3) and GATA-3 mRNA was detected by reverse-transcriptase polymerase chain reaction.

RESULTSCompared with healthy donors and patients with mild asthma, the percent of CD4+CD25+ Treg cells and plasma IL-10 levels were decreased in patients with moderate to severe asthma. There were no significant differences in Foxp3 mRNA expression among three groups, but a downward trend seen among patients with asthma. However, the percent of Th2 cells, IL-4 levels and expression of GATA-3 mRNA was markedly higher in patients with mild and moderate to severe asthma than in the control group. The ratio of Th2/Treg and their cytokines was increased in allergic asthma, especially for moderate to severe asthma. The ratio of GATA-3/Foxp3 mRNA was also increased in allergic asthma. In patients with moderate to severe asthma, the percentage of peripheral blood Treg cells was negatively correlated to the percentage of Th2 cells and IL-4 levels.

CONCLUSIONSThe decline of CD4+CD25+ Treg cells in patients with moderate to severe asthma may play an important role in progress of the disease. Furthermore, the deficiency of CD4+CD25+ Treg cells was associated with the over-expression of Th2 response.

Asthma ; etiology ; immunology ; Cytokines ; blood ; Forkhead Transcription Factors ; genetics ; GATA3 Transcription Factor ; genetics ; Humans ; RNA, Messenger ; analysis ; T-Lymphocytes, Regulatory ; immunology ; Th2 Cells ; immunology

OBJECTIVETo investigate the potential effects of arsenic trioxide (As(2)O(3)) combined with 8-(4-chlorophenylthio) adenosine 3', 5'-cyclic monophosphate (8-CPT-cAMP) on the retinoic acid (RA)-resistant acute promyelocytic leukemia (APL) cells.

METHODSThe RA resistant APL cell lines NB4-R1 and NB4-R2 were used as in vitro models. The effect of As(2)O(3) and/or 8-CPT-cAMP was evaluated according to cellular morphology, cell surface antigen and nitroblue-tetrazolium (NBT) assay. Meanwhile, immunofluorescence analysis and Western blot assay were used to detect the degradation of PML-RAR alpha fusion protein and the change of several key cell cycle regulatory proteins in these cells before and after the treatment.

RESULTSLow dose of As(2)O(3) (0.25 micromol/L) synergized with 8-CPT-cAMP (200 micromol/L) in inducing differentiation of NB4-R1 and NB4-R2 cells, while neither of these two drugs alone could induce differentiation of these cells. In addition, 8-CPT-cAMP was able to inhibit the cell growth by modulating the expression of some important cell cycle regulators and to facilitate the As(2)O(3)-mediated degradation of PML-RAR alpha fusion protein.

CONCLUSIONSAs(2)O(3) combined with 8-CPT-cAMP could induce differentiation of RA-resistant APL cells.

Antineoplastic Agents ; pharmacology ; Arsenicals ; pharmacology ; Cell Differentiation ; drug effects ; Cell Line, Tumor ; Cyclic AMP ; analogs & derivatives ; pharmacology ; Dose-Response Relationship, Drug ; Drug Resistance, Neoplasm ; Drug Synergism ; Humans ; Leukemia, Promyelocytic, Acute ; pathology ; Oxides ; pharmacology ; Thionucleotides ; pharmacology ; Tretinoin ; pharmacology

OBJECTIVETo elevate the immunological effect of subunit influenza vaccine in infants and aged people (over 60) using liposomal adjuvant in the context of its relatively low immunity and to investigate the relation between vaccine antigens and liposomal characteristics.

METHODSSeveral formulations of liposomal subunit influenza vaccine were prepared. Their relevant characteristics were investigated to optimize the preparation method. Antisera obtained from immunizinged mice were used to evaluate the antibody titers of various samples by HI and ELISA.

RESULTSLiposomal trivalent influenza vaccine prepared by film evaporation in combinedation with freeze-drying significantly increased its immunological effect in SPF Balb/c mice. Liposomal vaccine stimulated the antibody titer of H3N2, H1N1, and B much stronger than conventional influenza vaccine. As a result, liposomal vaccine (mean size: 4.5-5.5 microm, entrapment efficiency: 30%-40%) significantly increased the immunological effect of subunit influenza vaccine.

CONCLUSIONThe immune effect of liposomal vaccine depends on different antigens, and enhanced immunity is not positively correlated with the mean size of liposome or its entrapped efficiency.

Animals ; Influenza A Virus, H1N1 Subtype ; immunology ; Influenza A Virus, H3N2 Subtype ; immunology ; Influenza B virus ; immunology ; Influenza Vaccines ; administration & dosage ; immunology ; Liposomes ; Mice ; Mice, Inbred BALB C ; Orthomyxoviridae Infections ; prevention & control ; Specific Pathogen-Free Organisms ; Vaccines, Subunit ; administration & dosage ; immunology