OBJECTIVE: To develop the single-tube one-step methylation variable position (MVP) analysis technology-single-tube post-digestion PCR-melting curve analysis (PDP-MCA). METHODS: Based on differentially methylated region (DMR) reported previously as the model, a set of primers with different melting temperatures of products in the two sides of MVP were designed. By using the FastDigest methylation-sensitive restriction enzyme (MSRE), DNA digestion, multiplex amplification, MCA detection and MCA profiles were performed in a single reaction tube. Same samples (peripheral venous blood, semen, and vaginal fluid, 5 samples each type) were tested by single-tube one step MVP and traditional MSRE-PCR MCA technology. To verify the feasibility of this method, the results were compared with that of the traditional technology. The MCA/HRM profiles of different samples were analyzed and compared. RESULTS: When the melting temperature of the fragments had a differential of 2 degrees C, the MCA melting peaks separated well, and MCA detection after multiplex amplification was successful. The single-tube PDP-MCA assay was developed, which integrated multiple reactions (digestion, amplification and detection) into one tube. By this method, the sample-specific profiles and data were analyzed in 2 h, which is similar to that of the traditional method. The rapid classifications of the samples were also realized. CONCLUSION Multiplex MVPs can be analyzed in a single closed-tube. The single-tube PDP-MCA technology is a simple, fast, and automatable method. It can be used for detection of DNA methylation variations.
DNA/isolation & purification* ; DNA Methylation/genetics* ; DNA Primers/genetics* ; Humans ; Multiplex Polymerase Chain Reaction/standards* ; Nucleic Acid Denaturation

OBJECTIVETo investigate association of mutation in WNK4 gene with essential hypertension and to analyze the expression of WNK4 gene.

METHODScSNP in WNK4 gene in a small samples was detected by sequencing, then PCR-RFLP was performed in 98 patients with essential hypertension and 95 control subjects. The expression profile of WNK4 gene was tested by RT-PCR.

RESULTSA cSNP was detected in WNK4 gene exon7 G1662A, and there were significant differences in the distribution of allele frequency of G1662A between essential hypertension group and control group. WNK4 gene were expressed in the tissues of kidney, brain, lung, heart, spleen and intestine of fetus.

CONCLUSIONWNK4 gene is well correlated with essential hypertension.

Adult ; Brain ; metabolism ; Female ; Gene Expression ; Gene Frequency ; Genes ; Genetic Predisposition to Disease ; Humans ; Hypertension ; genetics ; Kidney ; metabolism ; Lysine ; genetics ; Male ; Middle Aged ; Mutation ; Phenotype ; Protein-Serine-Threonine Kinases ; biosynthesis ; genetics ; RNA, Messenger ; biosynthesis ; genetics

A new equipment of a computer multimedia system combined with a bronchoscope is presented here, which is able to provide active images with a high definition, image capture, synchronized video recording and playback during bronchoscopy. Its operation is easy and its quality is reliable. It is an advanced product for endoscopies and is worth while to be applied to clinical application.
Algorithms ; Bronchoscopes ; Equipment Design ; Image Processing, Computer-Assisted ; instrumentation ; Multimedia ; Software Design

OBJECTIVE The purpose of the present study was to investigate the impact of fluvas-tatin formulation on the pharmacokinetics-genetic polymorphis relationship. METHODS We compared the difference between the pharmacokinetics of fluvastatin as an extended-release (ER) 80 mg tablet and an immediate-release(IR)40 mg capsule in terms of drug metabolism enzyme and transporter ge-netic polymorphisms. In this open-label, randomized, two-period, two-treatment, crossover study, ef-fects of BCRP, SLCO1B1, MDR1, CYP2C9, and CYP3A5 polymorphisms on the pharmacokinetics of fluvastatin were analyzed in 24 healthy individuals.Each treatment duration was 7 days with a washout period of 7 days between the crossover.Serum concentration of fluvastatin was evaluated using high-performance liquid chromatography-tandem mass spectrometry. RESULTS The SLCO1B1 T521C genotype had no statistically significant effect on IR 40 mg capsule of fluvastatinafter single or repeated doses.However,for the ER 80 mg tablet,the SLCO1B1 T521C genotype correlated with the AUC0-24of repeat doses (P=0.01). The CYP2C9*3 genotype correlated with the AUC0- 24after the first dose IR 40 mg capsule (P<0.05); however, the difference between CYP2C9*1/*1 and CYP2C9*1/*3 was not statistically significant after repeated doses. CONCLUSION The effect of SLCO1B1 T521C on fluvas-tatin exposure was observed and was more profound in ER and repeated dose administration than in IR and single dose administration.We recommend that formulation should be incorporated into future pharmacogenomics studies and clinical implication guidelines.

OBJECTIVETo explore diagnostic value of MRI on posterior root tear of medial and lateral meniscus.

METHODSFrom January 2012 to January 2016, clinical data of 43 patients with meniscal posterior root tear confirmed by arthroscopy were retrospective analyzed, including 25 males and 18 females, aged from 27 to 69 years old with an average age of(42.5±8.3)years old;27 cases on the right side and 16 cases on the left side. MRI examinations of 43 patients with tear of posterior meniscus root confirmed by knee arthroscopies were retrospectively reviewed. MRI images were double-blinded, independently, retrospectively scored by two imaging physicians. Sensitivity, specificity and accuracy of MRI diagnosis of lateral and medial meniscus posterior root tear were calculated, and knee ligament injury and meniscal dislocation were calculated.

RESULTSForty-three of 143 patients were diagnosed with meniscus posterior root tears by arthroscopy, including 19 patients with lateral tears and 24 patients with medial tears. The sensitivity, specificity and accuracy in diagnosis of posterior medial meniscus root tears for doctor A were 91.67%, 86.6% and 83.9% respectively, and for doctor B were 87.5%, 87.4% and 87.4%, 19 patients with medial meniscal protrusion and 2 patients with anterior cruciate ligament tear. The sensitivity, specificity and accuracy in diagnosis of posterior lateral meniscus root tears for doctor A were 73.7%, 79.9% and 79% respectively, and for doctor B were 78.9%, 82.3% and 82.5%, 4 patients with lateral meniscus herniation and 16 patients with cruciate ligament tear. Kappa statistics for posterior medial meniscus root tears and posterior lateral meniscus root tears were 0.84 and 0.72.

CONCLUSIONSMRI could effectively demonstrate imaging features of medial and lateral meniscal root tear and its accompanying signs. It could provide the basis for preoperative diagnosis of clinicians, and be worthy to be popularized.

Adult ; Aged ; Anterior Cruciate Ligament Injuries ; diagnostic imaging ; Arthroscopy ; Female ; Humans ; Knee Injuries ; diagnostic imaging ; Magnetic Resonance Imaging ; Male ; Menisci, Tibial ; diagnostic imaging ; Middle Aged ; Retrospective Studies ; Sensitivity and Specificity ; Tibial Meniscus Injuries ; diagnostic imaging

OBJECTIVE: To evaluate clinical effects of posterior root tear of lateral meniscus through bone tunnel suture under arthroscopy. METHODS: From January 2012 to December 2014, 23 patients with posterior root tear of lateral meniscus repaired through bone tunnel suture under arthroscopy, including 15 males and 8 females, aged from 19 to 48 years old with an average age of (25.0±4.7) years old; 10 knees on the left side and 13 knees on the right side. Complications were observed, Lysholm score before and after operation at 12 months were used to evaluate clinical results, and VAS score was applied to assess pain relief. MRI was used to check recovery outcomes of lateral meniscus injury. RESULTS: All patients were followed up from 13 to 24 months with an average of (17.0±4.3) months. No injury of vessels, nerve and incision infection occurred. Motion of knee joint of 19 patients reached normal, 4 patients manifested limited activity of knee joint at12 months after operation. Postoperative Lysholm score 88.52±6.48 at 12 months was higher than that of before operation 46.12±7.35; Postoperative VAS score 0.8±0.7 at 12 months was lower than that of before operation 4.3±1.6. CONCLUSIONS Bone tunnel suture under arthroscopy for the treatment of posterior root tear of lateral meniscus could relieve pain, decrease postoperative complications and obtain good clinical efficacy.
Adult ; Arthroscopy ; Female ; Humans ; Knee Injuries ; Male ; Menisci, Tibial ; Middle Aged ; Sutures ; Tibial Meniscus Injuries ; Treatment Outcome ; Young Adult

OBJECTIVETo study the effects of resvaratrol derivatives on spontaneous HR and CF of isolated guinea pig atrium.

METHODThe dose-effect curve of resvaratrol was observed. The possible mechanism of potassium channels responsible for changes of CF and HR after administering with resvaratrol was measured.

RESULTResvaratrol reduced the spontaneous HR and weakened the CF in a dose-dependent manner ranging from 10(-6) to 3 x 10(-4) mol x L(-1) (P < 0.05). As compared with Res group, the effects were partly blocked by Gli (P < 0.05) and TEA (P < 0.01), but not blocked by 4-AP, BaCl2, Atropine.

CONCLUSIONResvaratrol can induce negative chronotropic action and negative (inotropic action. The mechanism(s) may relate to the opening of K(ATP) and Kc(Ca).

Animals ; Barium Compounds ; pharmacology ; Cardiotonic Agents ; administration & dosage ; isolation & purification ; pharmacology ; Chlorides ; pharmacology ; Dose-Response Relationship, Drug ; Female ; Glyburide ; pharmacology ; Guinea Pigs ; Heart Rate ; drug effects ; In Vitro Techniques ; KATP Channels ; antagonists & inhibitors ; Male ; Myocardial Contraction ; drug effects ; Plants, Medicinal ; chemistry ; Potassium Channel Blockers ; pharmacology ; Potassium Channels, Calcium-Activated ; antagonists & inhibitors ; Potassium Channels, Inwardly Rectifying ; antagonists & inhibitors ; Stilbenes ; administration & dosage ; isolation & purification ; pharmacology ; Tetraethylammonium ; pharmacology

Adult ; Asian Continental Ancestry Group ; genetics ; Collagen Type I ; genetics ; Humans ; Mutation ; Osteogenesis Imperfecta ; genetics ; Pedigree ; Perinatal Death

OBJECTIVETo observe the protective effects of resveratrol (RES) on the heart function of the rats with adriamycin-induced heart failure.

METHODThirty adult male SD rats were randomly divided into 5 groups: normal control (NC) group, adriamycin (ADR) group, RESL + ADR group, RES(H) + ADR group and RES group. RES of 30, 120, 120 mg x kg(-1) x d(-1) was given intraperitoneally (ip) once a day for 3 days in RES(L) + ADR group, RES(H) + ADR group and RES group respectively. The other two groups were given the same amount of normal saline the same way. On the 4h day,ADR of 10 mg x kg(-1) was given intraperitoneally once to induce myocardium injury model. After twenty-four hours, the pathological and biochemical changes of the myocardium were examined.

RESULTAs compared with NC group, the MDA, NO and NOS of the ADR group were significantly higher (P < 0.05), and the SOD of the ADR group were markedly lower (P < 0.05). As compared with ADR group, the indexes in RES(L) + ADR group, RES(H) + ADR group were exactly opposing, and took on dose dependance (P < 0.05). Light microscopic morphometry of the heart samples of the rats in ADR + RES(L, H) groups revealed typical diminishing of damage.

CONCLUSIONRES can relieve the toxic effects of ADR on myocardium, and the cardioprotective effects may be correlated with its antioxidant activity and downregulation of NO.

Animals ; Doxorubicin ; Heart ; physiopathology ; Heart Failure ; chemically induced ; pathology ; physiopathology ; Male ; Malondialdehyde ; blood ; Myocardium ; pathology ; Nitric Oxide ; blood ; Nitric Oxide Synthase ; blood ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Stilbenes ; pharmacology ; Superoxide Dismutase ; blood

OBJECTIVETo investigate the biomechanical stability of the acetabular fracture with three different internal fixation methods.

METHODSSixteen both-column acetabular fracture models were randomly divided into three groups:The specimens of 16 hip joints were randomly divided into 4 groups. Among them, 1 group of complete acetabulum were used as normal control group, and the other 3 groups simulated two column fracture models and were fixed in the following methods, respectively: anterior wall with screw and posterior with plate(SP), anterior wall with plate and posterior wall with screw(PS) and both wall with plate (PP). The degree of fracture displacement and the contact characteristics of the acetabulum were recorded by continuous vertical loading.

RESULTSThe mean longitudinal displacement under the load 800 N of SP, PS and PP three groups were (1.92±0.81), (2.09±1.13) and (3.44±0.75) mm, there was significant difference between SP and PP group (0.033). And the mean horizontal displacement of SP, PS and PP three groups were(0.63±0.33), (0.77±0.45) and (1.44±0.56) mm, there was significant difference between SP and PP group(0.047).Compared with normal control group in the acetabular area under the loading 800 N, the contact area of SP, PS and PP groups were increased by 6%, 9% and 27%, there was significant difference between PP and normal control group (0.027). Meanwhile, the mean stress of SP, PS and PP groups were increased by 4%, 29% and 39%, there was significant difference between PP and intact acetabulum group (0.003).

CONCLUSIONSAnterior column screw combined with posterior column plate has better biomechanical stability and contact characteristics than other two methods.