Objective To explore the expression of HCK gene during the cardiomyocyte differentiation of mouse embryonic stem cells and analyze the role of HCK gene in maintenance of pluripotency of embryonic stem cells.Methods Mouse embryonic stem cells were cultured,then induced to differentiate into cardiomyocytes.Total RNAs were isolated from mouse embryonic stem cells in the differentiation days:0 day(D0),the second day(D2),the fourth day(D4),the sixth day(D6),the eighth day(D8),respectively.The levels of HCK mRNAs were assessed by the method of semi-quantitive reverse transcriptase-polymerase chain reaction(RT-PCR).In the meanwhile,Total proteins were also isolated from mouse embryonic stem cells in the differentiation D0,D2,D4,D6,D8,and the levels of HCK proteins were evaluated by Western-blot.Results HCK mRNAs could be detected in the mouse embryonic stem cells in D0 and D2,however,they were undetectable from D4 to D8.The expression of HCK mRNAs was rapidly down-regulated during cardiomyocyte differentiation of mouse embryonic stem cells.Expression of HCK proteins,which coincided with HCK mRNAs,down-regulated during differentiation and couldn't be detected in D4.Conclusions With the cardiomyocyte differentiation of mouse embryonic stem cells,the expression of HCK in the levels of mRNA and proteins are sharply down-regulated;HCK may play an important role in maintaining the pluripotency of embryonic stem cell.

Objective To investigate the prevalence of endemic fluorosis in Guide county of Qinghai province, in order to provide appropriate measures to monitor and control the disease. Methods Damo, Wenquan, Baoning villages(water source has been changed) and Taiping village(water source has not been changed) in Guide county were involved in the study in 2008. One tap water sample was collected in dry and rainy seasons, respectively. Water fluoride was tested in accordance with the "Standard Test Methods for Drinking Water" (GB/T 5750.5-2006); of all the children aged 8 to 12, dental fluorosis was diagnosed using Dean criteria; 6 copies of urine samples were collected in each age group, urinary fluoride was measured using fluoride ion-selective electrode (WS/T 89-1996). According to the "Clinical Diagnostic Criteria of Endemic Skeletal Fluorosis "(WS 192-2008), clinical skeletal fluorosis was determined in adults over the age of 16 by X-ray examination for 10 people in each selected village. Results The mean water fluoride was 0.58,0.38,2.28,0.37 mg/L in Damo, Wenquan, Taiping, and Baoning villages, respectively, and that of Taiping village exceeded the national standard(1.0 mg/L). One hundred and ninety-three children aged 8-12 were checked, the detection rate of dental fluorosis was 49.74% (96/193); urine samples of 116 children were tested, median urinary fluoride was 1.49 mg/L A total of 1503 adults over the age of 16 were examined, the clinical detection of skeletal fluorosis was 51.63%(776/1503); a total of 82 people were X-rayed, X-ray detection of skeletal fluorosis was 20.73%(17/82). The characteristic of X-rays were degeneration and ossification of interosseous membrane. Conclusions Prevalence of dental fluorosis of children and adult clinical skeletal fluorosis are higher. The endemic fluorosis is still comparatively serious. Prevention efforts need to be further strengthened.

Objective To test the reliability and validity of the Chinese version of Profile of Fatigue Scale (PROF)among the patients with Sjogren′s syndrome. Methods The English version of PROF was translated into Chinese according to Brislin Translation Model. 107 patients with Sjogren′s syndrome were investigated to test its reliability and validity. Results The Cronbachαcoefficient , Guttman split-half coefficient, test-retest reliability and content validity of Chinese version of PROF were 0.976, 0.953, 0.872 and 0.875. Two factors were extracted by factor analysis and the cumulated variance was 80.75%. The structure of PROF was in line with the original scale. The criterion-related validity was 0.621 measured by comparing with visual analog scale of fatigue, and was -0.707 measured by comparing with vitality domain in the MOS item Short From Health Survey (SF-36). Conclusions The Chinese version of PROF has been proved to be reliable and valid. It can be used to measure the fatigue in Chinese patients with Sjogren′s syndrome.

Background and purpose:Chemotherapy plays an important role in the treatment of breast carcinoma by inhibiting the tumor growth and inducing the apoptosis.MAPK transduction pathway is closely related to proliferation and apoptosis of varieties of tumor cells,inhibition of MAPK pathway may increase the efficiency and decrease the toxicity of chemotherapy.Our study was to investigate the effect of MEK inhibitor PD98059 in response of breast cancer cell lines to Epirubicin.Methods:Human breast cancer cell lines MCF-7 and MCF-7/ADR were used as cell models.Epirubicin(EADM),PD98059(inhibitor of MAPK Kinase-MEK),or EADM+PD98059 was added into the culture medium,the expression of MEK2 and p-ERK were measured by Western blot,the growth of the two cell lines were measured by MTT.Results:ERK activity was elevated in MCF-7 after the treatment of EADM,the cells were more sensitive to EADM if combined with PD98059,while in MCF-7/ADR,ERK activity kept unchanged after EADM treatment,and PD98059 has no effect on the sensitivity of cells to EADM.Conclusion:MAPK signal transduction may be activated in some cells treated by EADM,adding inhibitor of MAPK signal transduction could improve the sensitivity of the cells to EADM.

Objective To investigate the occurrence of posterior femoral head tilt after clinical non-displaced femoral neck fracture,and to provide a reference basis for clinical surgery and improvement of disease prognosis.Methods Total of 165 pa-tients with non-displaced femoral neck fractures of Garden type Ⅰ and Ⅱ from January 2018 to June 2022 were selected as study subjects including 48 males and 117 females,with an average age of(71.5±8.5)years old ranging from 53 to 89,involving 97 cases of type Ⅰ and 68 of type Ⅱ.On the patient's preoperative sagittal or axial CT film of the hip,the angle formed by the ra-dius line of the femoral head and the midline of the femoral neck was used as the posterior tilt angle of the femoral head(α),and the posterior tilt femoral head angle was measured using the method proposed by Palm.The measured data were divided into 6 groups:α＜0°,0°＜α＜5°,5°≤α＜10°,10°≤α＜15°,15°≤α＜20°,α≥20°,and the incidence of different ranges of poste-rior tilt angle was compared.The sex composition ratio of 165 patients were analyzed and compared,and the age of 65 was used as the cut-off point to compare the incidence of fractures between genders.Patients were divided into the posterior tilt＜20° group for 135 cases and the posterior tilt ≥20°group for 30 cases according to the preoperative posterior tilt angle,the differ-ences between two groups in terms of gender and age were analyzed.Results Among 165 patients with non-displaced femoral neck fractures,143 cases with poaterior tilt of the femoral head occurred with an incidence of 86.7％.Posterior tilt 0°＜α＜5° ac-counted for 36 cases with an incidence of 21.8％;5°≤α＜10° accounted for 40 cases with an incidence of 24.2％;10°≤α＜15° accounted for 27 cases with an incidence of 16.4％;15°≤α＜20° accounted for 10 cases with an incidence of 6.1％;posterior tilt angle α≥20° accounted for 30 cases,the incidence was 18.2％,of which the maximum posterior tilt angle was 42.7°.Statis-tical analysis showed that the percentage of fractures in the 165 patients selected for this study was significantly higher in fe-male than in male,and that the female group was more likely to have fractures before the age of 65 years compared to the male group.However,gender,age and fracture subtypes(Garden Ⅰ,Ⅱ)were not influential factors for femoral neck fractures with a preoperative posterior femoral head tilt angle＞20°(P＞0.05).Conclusion The incidence of femoral head posterior tile in non-displaced femoral neck fractures is relatively high,in which severe posterior tile occurs,and the femoral head posterior tile an-gle ≥20° can reach 18.2％.In patients with closed reduction internal fixation,the fracture end needs to be repositioned as much as possible to reduce the risk of postoperative avascular necrosis of the femoral head.In order to prevent femoral neck frac-tures,special attention should be paid to anti-osteoporosis treatment for female.Preoperative assessment of posterior tilt is criti-cal for patients of different ages,genders and fracture subtypes(Garden Ⅰ,Ⅱ).

According to the designed specific primers of gene fragment based on the Salvia miltiorrhiza transcriptome data, with the method of reverse transcription polymerase chain reaction (RT-PCR), this study cloned full-length cDNA sequence of 1-hydroxy-2-methyl-2-(E)-butenyl-4-diphosphate synthase gene from Salvia miltiorrhiza bge.f.alba, this sequence is named as SmHDS and its GenBank registration number is KJ746807. SmHDS, 2 529 bp long, contains an ORF of 2 229 bp, encodes 742 amino acids, including 5' UTR 170 bp and 3' UTR 130 bp. Using bioinformatics software, having made a homology analysis of the obtained sequence, we can have a conclusion that SmHDS have a close genetic relationship with HDS of Salvia miltiorrhiza. Analysis result of prokaryotic expression revealed that in Escherichia coli, SmHDS expressed target proteins which in size are comparable with the protein predicted. Meanwhile, the 4 factors which can influence the protein expression were optimized, the 4 factors are inducing temperature, inducing time, IPTG concentrations and density of inducing host bacterium (A600). The optimal expression conditions of SmHDS were 30 degrees C until the A600 is 0.6, and add IPTG to a final concentration of 0.2 mmol x L(-1), and the induction time of 20 h. It provides theoretical basis for the further study of the function of 1-hydroxy-2-methyl-2-(E)-butenyl-4-diphosphate synthase in the biosynthesis of tanshinone compounds.
Cloning, Molecular ; DNA, Complementary ; genetics ; Diterpenes, Abietane ; biosynthesis ; Enzymes ; biosynthesis ; genetics ; Escherichia coli ; metabolism ; Plant Proteins ; biosynthesis ; genetics ; Salvia miltiorrhiza ; enzymology ; genetics

BACKGROUNDHemolytic anemia, elevated liver enzymes and low platelet count (HELLP) syndrome is a severe obstetric complication which usually resolves in most patients after delivery.

METHODSWe report a rare case of aggravation of HELLP syndrome after delivery.

RESULTSThe patient underwent the treatment for HELLP syndrome, including glucocorticoid therapy. The symptoms of HELLP syndrome reappeared and became more severe than before the termination of pregnancy. The patient also had severe and persistent hypoproteinemia, hyponatremia and hypocalcemia.

CONCLUSIONSHELLP syndrome is an acute and critical obstetric syndrome which can have heterogeneous presentations and variable prognosis. We should be fully aware of the diverse clinical characteristics of this condition.

Adult ; Anemia, Hemolytic ; diagnosis ; etiology ; Delivery, Obstetric ; adverse effects ; Female ; HELLP Syndrome ; diagnosis ; etiology ; Humans ; Hypocalcemia ; diagnosis ; etiology ; Hyponatremia ; diagnosis ; etiology ; Hypoproteinemia ; diagnosis ; etiology ; Pregnancy ; Young Adult

OBJECTIVETo investigate the clinicopathologic features, immunophenotyping, differential diagnoses and prognosis of histiocytic sarcoma (HS).

METHODSThe clinical and pathologic findings of 4 cases of HS were reviewed. The samples were used for paraffin section, HE stain, immunohistochemistry stain by EnVision method, electron microscope observation. Follow-up information was available in all patients.

RESULTSThe age of patients, 2 males and 2 females, ranged from 22 to 65 years old (median, 43.25 years). The sites of involvement included lymph node (2 cases), skin or soft tissue (1 case) and colon (1 case). The tumor cells were widespread infiltration, diffused distribution, no adhesion to each other. Tumor cells were middling and large, round, orbicular-ovate, polygon, epithelium appearance, plentiful cytoplasm and acidophilia, cystose. Nucelus was round, orbicular-ovate, dissymmetry. Nuclear chromatin was vacuole appearance, basophilia nucleolus, caryocinesia and pathological mitotic figure. Three of the cases showed conjugate nuclei, increased pleomorphism with multinucleated tumor giant cell formation. Focal cytoplasmic with foamy appearance was identified in 2 cases. One case demonstrated foci of spindly sarcomatoid appearance. Hemophagocytosis was identified in 2 cases. The tumor cells of 4 cases were often accompanied by various numbers of inflammatory cells. Immunohistochemical study showed that all cases were diffusely positive for α-1-ACT, CD68, CDl63 and lysozyme. Three of 4 cases also expressed CD45, CD45RO. The electron microscope results of 4 cases showed that the tumor cells were plentiful cytoplasm and a few cytolysosome in the cytoplasm, and no birbeck cytorrhyctes, cell-cell junction and digitation. Amongst the 4 patients with follow-up information available, three died of the disease 6-13 months after diagnosis. One patient, whose lesion was localized at the skin and soft tissue, survived at the present time.

CONCLUSIONHS was a scarce malignant tumor with mature histiocyte morphology and immunophenotype character. The diagnosis should be based on tissue morphology, immunohistochemistry and electron microscope observation to exclude other disorders.

Adult ; Aged ; Diagnosis, Differential ; Female ; Histiocytes ; pathology ; Histiocytic Sarcoma ; diagnosis ; pathology ; Humans ; Immunohistochemistry ; Immunophenotyping ; Male ; Microscopy, Electron ; Middle Aged ; Young Adult

Objective To investigate the application of StatLock and 3M films to fasten the catheters of central vena (CVC) in internal jugular vein puncture with ultrasonic guidance.Methods 109 brain cancer patients underwent CVC between March and May 2012 in the department of neurosurgery were randomly divided into the observation group (52 patients) and control group (57 patients).The catheters in the control group were fastened with 3M films.The observation group was fatened with both StatLock and 3M films.Then comparison was made between these two groups by dislocation of the catheters,adverse reactions around the puncture site and comfortable degree in care.Results The incidence of CVC dislocation and adverse reactions around the puncture site in the observation group were lower than the control group (7.69％ and 1.92％ vs 28.07％ and 15.79,x2 =7.54 and 4.72,respevtively; P ＜ 0.05).The comfort degree in care of the observation group was higher than that of the control group (94.23％ and 78.95％,x2 =5.53,P ＜0.05).Conclusions The application of StatLock and 3M films to fasten the catheters lowers the dislocation rate of CVC and the incidence of adverse reaction around the puncture site.It raises patients' comfort degree.

OBJECTIVETo observe the therapeutic effect of moxibustion on AIDS patients of spleen-kidney yang-deficiency.

METHODSSixty-six cases of AIDS were divided into a treatment group and a control group, 33 cases in each group. All of the patients were treated with HAART, with moxibustion at Tianshu (ST 25), Shenque (CV 8), Zhongwan (CV 12), Guanyuan (CV 4) added in the treatment group for 3 months. Clinical symptoms and cell immunity were recorded before and after treatment.

RESULTSAfter treatment, the effective rate was 90.9% in the treatment group, which was better than 66.7% in the control group (P < 0.05). The improvement of the score for clinical symptoms in the treatment group was superior to that in the control group (P < 0.01). After treatment, the CD4 lymphocyte counts increased in the two groups, with no significant difference between the two groups (P > 0.05). Additionally, increase of total lymphocyte count in the treatment group was superior to that in the control group (P < 0.05).

CONCLUSIONMoxibustion can increase the therapeutic effect of HAART on AIDS patients and increase the total lymphocyte count.

Acquired Immunodeficiency Syndrome ; immunology ; therapy ; Adult ; Antiretroviral Therapy, Highly Active ; Female ; Humans ; Kidney ; physiopathology ; Male ; Medicine, Chinese Traditional ; Middle Aged ; Moxibustion ; methods ; Spleen ; physiopathology ; Yang Deficiency ; immunology ; therapy