Backgroud and Objective Proline-rich tyrosine kinase2(Pyk2) is a Ca~(2+) sensitive,non-receptor tyrosine protein kinase.Previous reports showed Pyk2 involved in development of left ventrieular hypertrophy. The present paper aimed to study the effects of valsartan on ventricular hypertrophy and its effect on the expression of Pyk2 in myocardium in renovascular hypertensive rats(RHR).Methods Two-kidney and one-clip(2K1C) renal hypertensive model was established in Sprague-Dawley rats by chronic partial occlusion of left renal artery,and ran- domized to receive valsartan (30 mg/kg?d) or without treatment for 4 or 8 weeks.Left ventricular mass to body mass ratio was measured.Pyk2 protein expression and phosphorylation was detected by Western blotting.Results Blood pressure,left ventricular mass to body mass ratio,Pyk2 activity in myocardium of RHR were increased gradu- ally.Valsartan reduced BP and prevent myocardial hypertrophy(P

Objective To investigate the efficacy and security of cypher stent(sirolimus-eluting stent)in the treatment of old patients with coronary heart disease(CHD).Methods From November 2002 to May 2005,328 elderly CHD cases(age:60-86 years)were treated with 415 Cypher stents.Among the 328 patients,66 had ST-segment elevation of myocardial infarction,21 had non ST-segment elevation of myocardial infarction,149 had unstable angina and 92 had stable angina.As for lesion characteristics,diffuse disease was found in 91 case(26.1%),bifurcation lesions in 68 cases(19.6%),chronic total occlusion lesions in 56 cases(16.0%),in-stent restenosis in 14 cases and ostial lesions in 15 case.The immediate angiographic outcome,major cardiac event(MACE) and angiographic follow-up at 6 months were assessed.Results Stent implantation was successfully achieved in 99% patients with CHD.Acute and sub-acute stent thrombosis occurred in 2 patients,late stent thrombosis with AMI occurred in 2 patients,1 died during the 6 months follow-up.The MACE rate during hospitalization was 0.6% and 3.6% during 6 months follow-up.Angiographic follow-up in 84 patients at 6 months showed that in-stent restenosis rate(ISR)was 8.3%(restenosis within the stents was 2.4%).The target vessel revascularization(TLR)rate was 5.9%.Conclusions Cypher stent implantation in CHD is safe and effective,the ISR rate and TLR rate are significantly lower than those of bare metal stents.

Objective To evaluate the effect of PTH gene polymorphisms on bone mineral density (BMD) at multiple skeletal sites in normal females.Methods PTH gene phenotype was determined by PCR-RFLP of restriction enzyme Bst BⅠin 596 females aged (46.3?13.7) years (20-80 years),and PCR products with or without enzymolytic site were considered as genotype B or genotype b respectively.BMDs of the anteropesterior spine (AP) and supine lateral spine (Lat) of lumbar vertebrae (L_1-L_4),femoral neck (FN),total hip (T-hip), Ward's triangle (Ward),Trochanter (Troch),forearm [radius+ulna ultradistal (RUUD) and total area of radius + ulna (RUT) ] were measured by DEXA (QDR4500A).Results (1) Hardy-Weinberg equilibrium was evident for PTH polymorphisms.The frequencies of genotype were BB 0.784,Bb 0.208,bb 0.008 and frequencies of alleles B,b were 0.888 and 0.112 respectively in 596 normal females.Frequencies of BB,Bb,bb genotypes were 0.781,0.210,and 0.009 respectively in 347 postmenopausal women and their frequencies of alleles B,b were 0.886,0.114.No significant difference was found between post- and premenopausal women in genotype frequen- cy.(2) Comparing their BMDs of AP,Lat,FN,T-hip,Ward,Troch,RUUD and RUT,there was no significant difference between BB and Bb genotypes of pre- and postmenopansal women groups.(3) Logistic regression analysis failed to show any statistical difference between normal and osteoporosis women with regard to PTH phenotype.Conclusion PTH gene polymorphism has little effect on BMD in normal females.

OBJECTIVEThis review discusses the experimental and clinical studies those show the expression of connexin 36 in the central nervous system and the possible role of connexin 36 in epileptic seizure.

DATA SOURCESAll articles used in this review were mainly searched from PubMed published in English from 1996 to 2012.

STUDY SELECTIONOriginal articles and reviews were selected if they were related to the expression of connexin 36 in the central nervous system and its role in epilepsy.

RESULTSThe distribution of connexin 36 is developmentally regulated, cell-specific and region-specific. Connexin 36 is involved in some neuronal functions and epileptic synchronization. Changes in the connexin 36 gene and protein were accompanied by seizures. Selective gap junction blockers have exerted anticonvulsant actions in a variety of experiments examined in both humans and experimental animals.

CONCLUSIONSConnexin 36 plays an important role in both physiological and pathological conditions in the central nervous system. A better understanding of the role of connexin 36 in seizure activity may contribute to the development of new therapeutic approaches to treating epilepsy.

Animals ; Central Nervous System ; metabolism ; Connexins ; metabolism ; Gap Junctions ; metabolism ; Humans ; Seizures ; metabolism

Coal ; Dust ; analysis ; Gases ; adverse effects ; Humans ; Male ; Middle Aged ; Occupational Exposure ; analysis ; Pulmonary Alveolar Proteinosis ; etiology

OBJECTIVETo evaluate the clinical effects by comparing three different fixation methods: tension band, hollow lag screw and anatomical plate.

METHODSFrom January 2010 to January 2012, 82 patients with olecranon fractures who underwent surgical treatments were followed-up. All the patients were divided into three groups: tension band fixation group (group A), hollow lag screw fixation group (group B), anatomical plate fixation (group C). In group A, there were 35 patients, including 19 males and 16 females, ranging in age from 32 to 49 years old, with an average of (43.6 ± 8.7) years old, and the patients were treated with tension band fixation. According to Colton classification, there were 5 cases of type I, 3 cases of type II A,19 cases of type II B, and 8 cases of type II C in group A. Among 20 patients in group B, there were 13 males and 7 females, ranging in age from 27 to 50 years old, with an average of (41.5 ± 9.3) years old. The patients in group B were treated with hollow lag screw fixation. According to Colton classification, there were 4 cases of type I, 4 cases of type II A, and 12 cases of type II B in group B. In group C, there were 27 patients totally, including 15 males and 12 females, ranging in age from 30 to 55 years old, with an average of (38.2 ± 6.2) years old. The patients in group C were treated with anatomical plate fixation. According to Colton classification, there were 4 cases of type II B, 13 cases of type II C, and 10 cases of type II D in group C. The Fracture healing time, complications and functional recovery were retrospectively observed and recorded.

RESULTSAll the patients were followed up, and the duration ranged from 8 to 24 months, with an average of 15 months. The average healing time of patients in group C was the longest among three groups. The flexion-extension and rotation activities of elbow joint in group B and C were better than that in group C. According to Broberg & Morrey score system, the therapeutic effects of patients in group A and B were better than that of group C. In group C, 2 patients had incision infections, 6 patients complained of foreign body sensation, 1 patient got a delayed fracture healing, and 1 patient had the heterotopic ossification. There were no occurrences of incision infections in group A and B; internal fixation loosening occurred in 3 patients in group A and 2 patients in group B; delayed fracture healing occurred in 2 patients in group A and 2 patients in group B; and skin bursa formation occurred in 6 patients in group A and 1 patient in group B.

CONCLUSIONAll the three ways are effective methods for the treatment of olecranon fractures. Fixation methods should be selected depending on the type of fracture.

Adult ; Bone Plates ; Bone Screws ; Case-Control Studies ; Female ; Fracture Fixation, Internal ; methods ; Fracture Healing ; Humans ; Male ; Middle Aged ; Olecranon Process ; injuries ; Ulna Fractures ; surgery

To construct the cDNA expression library from human U937 cell, total RNA and purified mRNA in myeloid leukemia cell line U937 were extracted. The first and second strand of cDNA were synthesized through reverse transcription. After blunting the cDNA termini, the cDNA fragments were connected with EcoR I adapters, and the end of EcoR I adapters was phosphorylated. Then the cDNAs were digested by Xho I, and the fragments smaller than 400 bp were removed by Sephacryl-S400 spin column, the fragments longer than 400 bp were ligated with lambdaZAP vector. The recombinants were packaged in vitro, and a small portion of packaged phage was used to infect E coli XL1-Blue-MRF' for titration. The recombinants were examined by color selection. In order to evaluate the size of cDNA inserts and the diversity of library, the pBK-CMV phagemid was excised from the ZAP expression vector by using ExAssist helper phage with XLOLR strain, and then the pBK-CMV phagemid was digested by Xho I and EcoR I. The results showed that the U937 cell line cDNA library consisting of 2.87 x 10(6) recombinant bacteriophages was constructed. The average size of exogenous insert in the recombinants was about 1.7 kb. It is concluded that the constructed cDNA library can be used to screen target clones.
Gene Library ; Humans ; RNA, Messenger ; analysis ; U937 Cells ; metabolism

OBJECTIVETo prepare and characterize polyelectrolyte multilayer film coated microbubbles for use as ultrasound contrast agent (UCA) and evaluate its effects in ultrasonic imaging on normal rabbit's liver parenchyma.

METHODSPerfluorocarbon (PFC)-containing microbubbles (ST68-PFC) were prepared by sonication based on surfactant (Span 60 and Tween 80). Subsequently, the resulting ST68-PFC microbubbles were coated using oppositely charged polyelectrolytes by microbubble-templated layer-by-layer self-assembly technique via electrostatic interaction. The enhancement effects in ultrasonic imaging on normal rabbit's liver parenchyma were assessed.

RESULTSThe obtained microbubbles exhibited a narrow size distribution. The polyelectrolytes were successfully assembled onto the surface of ST68-PFC microbubbles. In vivo experiment showed that polyelectrolyte multilayer film coated UCA effectively enhanced the imaging of rabbit's liver parenchyma.

CONCLUSIONSThe novel microbubbles UCA coated with polyelectrolyte multilayer, when enabled more function, has no obvious difference in enhancement effects compared with the pre-modified microbubbles. The polymers with chemically active groups (such as amino group and carboxyl group) can be used as the outermost layer for attachment of targeting ligands onto microbubbles, allowing selective targeting of the microbubbles to combine with desired sites.

Animals ; Contrast Media ; chemistry ; Electrolytes ; chemistry ; Fluorocarbons ; chemistry ; Liver ; diagnostic imaging ; Microbubbles ; Polymers ; chemistry ; Rabbits ; Surface Properties ; Surface-Active Agents ; chemistry ; Ultrasonics ; Ultrasonography

OBJECTIVETyping of Mycobacterium tuberculosis strains and epidemiological studies in the army of southern China to provide scientific basis for prevention of pulmonary tuberculosis.

METHODSA rapid fingerprinting of M. tuberculosis strains method by polymerase chain reaction (PCR) with outward-directed primers that designed to the ends of the insertion sequence IS6110 was developed, and to analyze the relationship between the polymorphism of DNA fingerprinting and epidemiology of M. tuberculosis.

RESULTSOne hundred and fifty-four M. tuberculosis detected were classified into eight types according to their characters of PCR amplified fingerprints. The main types were type I (36.4%), type II (31.8%), and type III (21.4%), while other types were less than 4 percentage. In those main type groups, patients aged 20 to 29 and 30 to 39 took up 31.8% and 27.9% respectively. For those main types, the distribution of those types in the first treated patients showed significant difference compared with that in the retreated patients, and the rate of drug-resistance was also statistically different. However, the distribution was not statistically significant to history of BCG vaccination and patients living in urban or rural area. The main drug-resistant strains were only Isoniazid-resistant or Rifampin-resistant strains, while the drug-resistant strains were 44.4%, 29.6% and 14.8% respectively in type I, type II and type III.

CONCLUSIONPCR fingerprinting was a rapid, precise, sensitive, specific method to type M. tuberculosis, and could be used to study the epidemiology of tuberculosis; The prevalence of tuberculosis was primarily due to the transmission of type I, type II and type III in the army being studied from Southern China, to suggest that surveillance needs to be strengthened.

Adult ; China ; epidemiology ; DNA Fingerprinting ; methods ; DNA, Bacterial ; genetics ; Female ; Humans ; Male ; Military Personnel ; Molecular Epidemiology ; Mycobacterium tuberculosis ; classification ; genetics ; isolation & purification ; Polymerase Chain Reaction ; methods ; Polymorphism, Genetic ; Sensitivity and Specificity ; Tuberculosis ; epidemiology ; Tuberculosis, Multidrug-Resistant ; epidemiology ; microbiology

OBJECTIVETo evaluate the sensitivity and usefulness of 99mTc-sestamibi scintigraphy (SS) and neck ultrasonography (US) as preoperative localization procedures in patients with primary hyperparathyroidism (pHPT).

METHODS160 patients with proved pHPT in Peking Union Medical College Hospital from June 1983 to June 2002 were studied. There were 107 women(66.9%) and 53 men (33.1%), with a mean age of 38.9 years (10-73 years). 100 patients were underwent SS and 148 patients were underwent US prior to surgery, and the results were compared with operative and histological findings.

RESULTSThe sensitivity of SS and US in localization of the enlarged parathyroid glands was 94.0% and 85.1% respectively, and the positive predictive value of SS and US was 100% and 89.1% respectively, the overall sensitivity was 98.9% by combination of SS and US. In solitary parathyroid adenomas group (n = 145), the sensitivity of SS and US was 93.3% and 84.7% respectively; There was no significant difference (P = 0.428) in sensitivity of SS between the parathyroid glands correctly identified and undetected in classical neck location as compared with ectopic parathyroid glands, whereas significantly (P = 0.026) influenced by the US sensitivity.

CONCLUSIONSDifferent sensitivity exit between SS and VS in preoperative localization in patients with pHPT undergoing parathyroidectomy. The combined use of SS and US could increase the sensitivity of localization technique. Ectopic parathyroid had no influence on the sensitivity of 99mTc-MIBI scanning, but decreased the sensitivity of ultrasonography. The size of parathyroid tumors had effects on the sensitivity of ultrasonography. Otherwise, various conditions causing SS false negative were observed. Some interfere factors should be excluded when SS negative results were encountered in clinical practice.

Adolescent ; Adult ; Aged ; Child ; Female ; Humans ; Hyperparathyroidism ; diagnostic imaging ; pathology ; Male ; Middle Aged ; Neck ; diagnostic imaging ; Parathyroid Glands ; diagnostic imaging ; pathology ; Preoperative Care ; Radionuclide Imaging ; Sensitivity and Specificity ; Technetium Tc 99m Sestamibi ; therapeutic use ; Ultrasonography