Molecular methods and fluoroscopic techniques suggest that rich microbial diversity exist in the marine environment, but less than 1% of these microbes can be cultured in the laboratory conditions, and that the cultivable dominant species were even less. This limitation has long been a barrier to the development of environmental microbiology and the utilization of marine resources. In the past decade, novel methods for culture and detection of these uncultured marine microbes have successfully applied to obtain several conventionally-uncultured microbes including those from extreme environments. Those progresses have inspired researchers greatly. Developments in the research of marine microbial resources are an important basis for the study of the micro-world and deserve increasing scientific attention.

BACKGROUNDTo investigate epidemiology and HLA typing of highly exposed to HIV but persistently seronegative subjects (HEPS) in commercial blood donors in China.

METHODSThis was a cohort study for epidemiologic characteristics of highly exposed but persistently seronegative subjects. PCR with sequence-specific primer and PCR-SSP for HLA typing were applied.

RESULTSEight HEPS were identified. Compared HLA typing with seropositive couple, high frequency of HLA-a24, HLA-B40 genotyping was observed.

CONCLUSIONHighly exposed to HIV but persistently seronegative subjects in commercial blood donors in China had high frequency of HLA-A24 and HLA-B40 genotype.

Adolescent ; Adult ; Blood Donors ; China ; epidemiology ; Cohort Studies ; Female ; HIV ; immunology ; HIV Antibodies ; blood ; HIV Infections ; epidemiology ; virology ; HIV Seronegativity ; HLA Antigens ; genetics ; HLA-A Antigens ; genetics ; HLA-A24 Antigen ; Histocompatibility Testing ; methods ; Humans ; Male ; Middle Aged ; Polymerase Chain Reaction ; Young Adult

Objective To analyze the normal reference values of left ventricular longitudinal peak systolic strain (LS) and strain rate (LSr) by two-dimensional speckle tracking imaging (2D-STI) in healthy children at different ages.Methods Clinical ultrasound data of 330 healthy children who taking physical examination in our hospital from September 2015 to November 2016 were collected and retrospectively.They were divided into 7 groups according to their ages,that is,neonate group (0 to 28 days old),infant group (28 days to 1 year old),toddle group (1 to 3 years old),pre-school group (3 to 6 years old),school age group (6 to 9 years old),pre-adolescence group (9 to 13 years old) and adolescence group (13 to 18 years old).2D-STI was performed in the 3 apical projections of left ventricle (LV).The regional peak systolic longitudinal strain and strain rate of LV were measured.Results ① Significant differences were found in the LS and LSr values from 6 segments of the same wall (P ＜ 0.05),and the LS and LSr values were gradually increased from basal segment to apical segment.②There were no significant differences in the LS,LSr and global LS (GLS) values of 18 segments between sexes (P ＞ 0.05).③ Except the basal segments of posterior wall,inferior wall and posterior septum,LS value was gradually elevated with the increase of age (LS ＜LSinfant ＜ LStoddler,pre-shool and school age ＜ LSpre-adolescence and adolescence),So was GLS value.④LS in 18 segments had a positive correlation with age,and the value of apical segment in lateral wall was most remarkably correlated (r =0.551,P ＜0.01);Regional LS had a negative correlation with heart rate,and that of middle segment in lateral wall was the most apparent (r =-0.625,P ＜ 0.01);GLS was positively influenced by age (r =0.665,P ＜ 0.01) and negatively affected by heart rate (r =-0.625,P ＜ 0.01).⑤The heterogeneities were found in the correlations of regional LSr with age and heart rate in segments and in the LSr among different age groups.Conclusion Normal reference values of LV peak LS and LSr are established for healthy children at different ages,and they possess their own characteristics.

ObjectiveTo evaluate the improvement on test performance of UniCel DxH 800 automated hematology analyzer for complete blood count (CBC) by detecting its performance indicators and comparing the differences of the results with LH 750 hematology analyzer and ADVIA 2120 hematology analyzer.MethodsThe precision,carryover and linearity of UniCel DxH 800 in measurement of CBC were evaluated by using fresh blood samples and instrument quality control of products.To evaluate the accuracy of leukocyte differential count and reticulocyte count with the microscopic method as the “gold standard”.To calculate the bias and correlation between the results measured by LH 750,ADVIA 2120 and UniCel DxH 800 hematology analyzers and compare these three instruments on the validity of the alarm in abnormal cells.ResultsIntra-precision:The coefficient of variation (CV) of the results of RBC,Hb and MCV were less than 0.5％,the CV of WBC and PLT results were less than 1.5％.Inter-precision:the CV of the parameters above were less than 2.5％.The carryover rate of WBC,RBC,Hb,MCV and PLT were less than 0.51％.In the concentration range covered by clinical samples,the correlation coefficients between the measured values and theoretical value in testing WBC,RBC,Hb and PLT were greater than 0.999 ( P ＜0.01 ).The measurement results of WBC,RBC,Hb,MCV and PLT hy UniCel DxH 800,ADV1A 2120 and LH 750 hematology analyzers have good correlation (r ＞ 0.973,P ＜ 0.01 ).Correlation of reticulocyte count between the UniCel DxH 800 hematology analyzer and microscolpic method was significant (r =0.920,P ＜0.01 ).Correlation of leukocyte differential count about the grauulocytes, lymphocytes and eosinophils between the UniCel DxH 800 hematology analyzer and microscopic method was good (r =0.914,0.900 and 0.725,P ＜0.01 ),followed by monocytes ( r =0.612,P ＜0.01 ),which were better than the LH 750 with similar detection principle.The UniCel DxH 800 hematology analyzer demonstrated higher sensitivity (96.6％ ) for the alarm of abnormal cells and achieved a lower false-negative rate (2.5％ ).Meanwhile,the sensitivity of the neutrophil nuclei left shift was higher (90.5％ ) and the false-negative rate (5.0％) was lower.ConclusionsThe UniCel DxH 800 hematology analyzer for complete blood count shows advantages of high precision,low carryover rate and wide linear range.The results detected by the UniCel DxH 800 hematology analyzer have good correlation with the LH 750 and ADVIA 2120.

ObjectiveTo introduction of perforator flaps,muscle flaps pedicled by descending branch of lateral circumflex femoral artery,method and their clinical application that multiple soft tissue defects of hand are repaire by muliplefoliated tissue flap only branch lateral circumflex femoral artery.MethodsFifteen patients with multiple soft tissue defects of hand were repaired muliplefoliated tissue flap only pedicled bydescending branch lateral circumflex femoral artery.At first,the anterolateral thigh perforator flap was designed and harvested according to the soft tissue defects of hand, then the descending branch lateral circumflex femoral artery was dissected at the same time the segmented perforator flap,fascia lata flap,rectus femoris muscle flap, vastus lateralis muscle flap, vastus intermedius muscle flap and distal spatium intermusculare flap were harvested in need according to distance among soft tissue defects.The muliplefoliated tissue flap was harvested only pedicled by descending branch lateral circumflex femoral artery, at last muscle flaps and fascia lata flaps were covered by skin graft, so the multiple soft tissue defects of hand were repaired in one time.ResultsNo vascular crisis happened. All skin grafts survived well, the contour of all repaired soft tissue defects was good and protective feeling was recovered by skin grafts of all flaps. All cases were got follow-up and the range was from 6 to 20 months(the average was 8.7 months).Wound of donor site healed well, muscle strength of quadriceps and motion of knee were normal. Three cases were excellent,nine cases were well and 3 cases were good, according to upper extremity function evaluation criteria of Chinese Medical Society for the Surgery of the Hand, the rate of good was 80 percent.ConclusionMultiple soft tissue defects of hand can be repaired by muliplefoliated flap only pedicled by descending branch of lateral circumflex femoral artery. Its advantages included reduction of operation time and treatment, good recovery of hand contour and function. It is a good method to repair multiple soft tissue defects of hand.

OBJECTIVES: Some changes are found in the labyrinth anatomy during postnatal development. Although the spatial orientation of semicircular canals was thought to be stable after birth, we investigated the age-related orientational changes of human semicircular canals during development. METHODS: We retrospectively studied the computed tomography (CT) images of both ears of 76 subjects ranged from 1 to 70 years old. They were divided into 4 groups: group A (1-6 years), group B (7-12 years), group C (13-18 years), and group D (>18 years). The anatomical landmarks of the inner ear structures were determined from CT images. Their coordinates were imported into MATLAB software for calculating the semicircular canals orientation, angles between semicircular canal planes and the jugular bulb (JB) position. Differences between age groups were analyzed using multivariate statistics. Relationships between variables were analyzed using Pearson analysis. RESULTS: The angle between the anterior semicircular canal plane and the coronal plane, and the angle between the horizontal semicircular canal plane and the coronal plane were smaller in group D than those in group A (P<0.05). The JB position, especially the anteroposterior position of right JB, correlated to the semicircular canals orientation (P<0.05). However, no statistically significant differences in the angles between ipsilateral canal planes among different age groups were found. CONCLUSION: The semicircular canals had tendencies to tilt anteriorly simultaneously as a whole with age. The JB position correlated to the spatial arrangement of semicircular canals, especially the right JB. Our calculation method helps detect developmental and pathological changes in vestibular anatomy.
Ear ; Ear, Inner ; Humans* ; Methods ; Parturition ; Retrospective Studies ; Semicircular Canals* ; Tomography, X-Ray Computed

alphaB-crystallin is a member of the sHSP (Small heat shock protein) family, which plays an impor tant role in multiple neurodegeneration diseases. To give insight into the possible alternation and the role of aB-crystallin in prion disease, the alphaB-crystallin levels in the brain tissues of agent 263K-infected hamsters were evaluated. Western blots and IHC revealed that at the terminal stages of the diseases, the levels of alphaB-crystallin were increased up to 3-fold in the brain tissues of scrapie infected 263K hamsters compared with normal controls. Immunofluorescent assays revealed that the up-regulated alphaB-crystallin was mainly observed in astrocytes, but not in neurons. The co-localization between alphaB-crystallin and abnormal deposition of PrPsc in the brain tissues of the scrapie infected hamsters was not observed. The study may provide a foundation for further revealing the potential role of alphaB-crystallin in prion disease.
Animals ; Brain ; metabolism ; pathology ; Cricetinae ; Humans ; PrPSc Proteins ; metabolism ; Prion Diseases ; genetics ; metabolism ; pathology ; Up-Regulation ; alpha-Crystallin B Chain ; genetics ; metabolism

OBJECTIVETo prepare a DNA Microarray that can detect 8 common species of food borne bacterial pathogens in south China.

METHODSAll the 70mer oligo probes were designed on the characteristic genome loci of the 8 species of food borne bacterial pathogens. Eight subarrays corresponding to the 8 food borne bacterial pathogens were spotted onto the slide and integrated into a pan-array on the chip. A number of identified and known bacterial samples from the storage bank were selected for the validation test.

RESULTSBased on the PPR ranking, for LM sub-array, the PPR of the 3 Listeria bacteria LM, Lin and Liv was 68.8%, 51.8% and 59.6%, respectively, while that of the non-Listeria bacterial samples was all below 43%. For VC sub-array, the PPR of VC sample was 54.1% and that of the non-VC bacterial samples was lower than 17.2%. For VP sub-array, the PPR was 66.7% for VP sample and below 24.2% for non-VP bacterial samples. For Sal sub-array, the PPR was 55.9% for Sal sample and below 50.5% for non-Sal bacterial samples. For Shi sub-array, the PPR of Shi sample and the non-Shi bacterial samples was 53.8% and below 36.6%, respectively. For SA sub-array, the PPR of SA sample and non-SA bacterial samples was 65.2% and below 22.7%, respectively. For CJ sub-array, the PPR of the 2 Campylobacter bacteria CJ and CC were 88.2% and 58.8%, respectively, and that of the non-Campylobacter bacterial samples was lower than 35.3%. For EC sub-array, the PPR of EC sample was 47.9%, and that of the non-EC bacterial samples was lower than 41.6%. Evaluation of the Biosafood-8 chip developed in this study by 18 biological samples from different origins demonstrated its good specificity and accuracy in the identification of the pathogens.

CONCLUSIONThe chip we developed can clearly differentiate the target food borne pathogenic bacteria and non-target bacteria and allows specific and accurate identification of the species of the tested bacteria isolates.

Bacteria ; classification ; isolation & purification ; China ; Food Contamination ; analysis ; Food Microbiology ; Oligonucleotide Array Sequence Analysis ; methods

Objective To evaluate interventional therapy for biliary stricture (BS) after orthotopic liver transplantation (OLT). Methods The efficacy of interventional therapy for BS after OLT from Oct 2003 to Jan 2006 was analyzed retrospectively. Fifty-three patients received 107 times of interventional therapy through endoscopic retrograde cholangiography ( ERC) which included 68 nasobiliary catheter placements,26 biliary balloon dilatations and stent placements and 13 ERC. Nine patients received 11 times of interventional therapy through percutaneous transhepatic cholangiography ( PTC) including 2 PTC, 7 percutaneous drainages,3 biliary balloon dilatations and 1 biliary stent replacement. One patient received bile drainage through T tube. Results The success rate of ERC was 88. 8% (95/107) , that of nasobiliary catheter placement 94% (64/68) , biliary stent placement 88. 5% (23/26). The success rate of PTC was 81. 8% (9/11) , that of percutaneous drainage was 100% (7/7) , biliary stent replacement 100% (1/1). The curative rate of interventional therapy for 53 patients with BS was 28. 3% (15/53) ,the improvement rate was 41. 5% (22/53). The curative rate of interventional therapy for anastomotic, extrahepatic, intrahepatic hilar and diffuse BS was respectively 66. 7% (4/6)、66. 7% (10/15)、50% (1/2)、0 (0/7) and 0 (0/22). Conclusions The efficacy of interventional therapy for BS after OLT was not satisfactory. The result relates to the type of BS, for anastomotic, extrahepatic and solitary intrahepatic BS this therapy was effective, while that for hilar and diffuse BS the prognosis was poor.

OBJECTIVETo observe the effect of Zishen Huoxue Recipe (ZHR) on pathomorphology in coronary heart disease (CHD) rats with Shen deficiency blood stasis syndrome (SDBSS).

METHODSTotally 60 healthy Wistar rats were divided into the blank control group, the model group, high, middle, and low dose ZHR groups according to random digit table, 12 in each group. Myocardial ischemia SDBSS rat model was prepared by ligating the left anterior descending coronary artery and injecting hydrocortisone. ZHR physic liquor was administered to rats in high, middle, and low dose ZHR groups at the daily dose of 21.6, 10.8, 5.4 g/kg by gastrogavage for 7 successive days, equal volume of pure water was administered to rats in the blank control group and the model group by gastrogavage for 7 successive days. Rat heart was collected for pathomorphological observation under light microscope.

RESULTSIn the model group the heart muscle fiber was swollen and deformed with widened space, loose and dropsy tissues. Blood vessels in myocardial mesenchymal were dilated, infiltrated with more inflammatory cells. Myocardial cells were markedly swollen, degenerated, or necrotic, with caryolysis or disappearance of partial nuclear. A large amount of collagen fibrous tissue became hyperplasia. Endocardial blood vessels were swollen and degenerated with infiltration of few inflammatory cells. Epicardium tissue and structure were destroyed and got hyperplasia. Swollen, degenerated, or necrotic vessels could be seen, with infiltration of more inflammatory cells and collagen deposition. Pathomorphological injuries were alleviated in each ZHR group. The higher ZHR concentration, the milder the injury degree of myocardial tissue, the more limited range of damage.

CONCLUSIONZHR could attenuate pathomorphological injuries of myocardial ischemia rats with SDBSS and regulate myocardial function, thus improving myocardial ischemia in CHD rats with SDBSS.

Animals ; Coronary Artery Disease ; drug therapy ; Drugs, Chinese Herbal ; pharmacology ; therapeutic use ; Medicine, Chinese Traditional ; Myocardial Ischemia ; Myocardium ; Rats ; Rats, Wistar