ObjectiveTo study the effect of sub-chronic exposure to deltamethrin(DM) on neural behavior and expression of NMDA receptor in hippocampus of mice.Methods 60 Female SPF Kunming mice were divided into 4 groups and given DM 60 days by gavage.Hot-plate,rotarod,grip strength,hing limb landing foot splay were used to examine the sensory and motor change of mice.Autonomic activity test was used for detecting the functional status of the central nervous system in mice.Passive avoidance test for detection of the behavior changes of learning and memory,and RQ-PCR was employed to measure the expression of NMDA receptor in hippocampus of mice.ResultsThe behavior of sensory and motor of mice sub-chronic exposure to deltamethrin did not have changes significantly(P ＞ 0.05 ).In the test of autonomic activity test,the average of autonomic activity times were (93 ± 18) times,(107 ± 13) times,(105 ±22) times.Compared with the control group,the average of autonomic activity times in middle-and high-dose groups were increased significantly (P ＜ 0.05 ).The latent periods in poisoning groups were (175.4 ±38.4) s,(146.4 ±51.2)s,(132.3 ±45.0) s,and the error times were (0.7 ±0.3)times,( 1.4 ± 0.5 ) times,( 1.8 ± 0.9) times.Compared with the control group,latent periods of high-dose group were decreased and the error times of middle-and high-dose groups were increased significantly (P ＜ 0.05 ).Compared with the control group,the relative expression levels of NR1 and NR2A mRNA in hippocampus of middle and high-dose groups were increased significantly (P＜ 0.05 ),and the relative expression level of NR2B mRNA in highdose group was decreased significantly(P ＜ 0.05).ConclusionSub-chronic exposure to DM could increase the excitability of mice,damage the function of learning and memory,and influence the expression of NMDA receptor in hippocampus of mice.

Multiple displacement amplification (MDA) is a new technology for whole genome amplification (WGA), which can generate large amount of high-quality DNA and features high amplification efficiency and fidelity. MDA combined with conventional PCR techniques has been successfully applied for preimplantation genetic diagnosis, which has broaden latter's clinical applications.
Genome, Human ; Humans ; Nucleic Acid Amplification Techniques ; methods ; Polymerase Chain Reaction ; methods ; Preimplantation Diagnosis ; methods

BACKGROUNDArrhythmogenic right ventricular cardiomyopathy (ARVC) is one of the leading causes of sudden cardiac death. Recent studies have shown that ARVC, which is an inheritable genetic change, results from mutations in genes encoding desmosomal proteins. Plakophilin-2 is an important component of the desmosome. Because the full range of genetic variations related to ARVC is unknown and no related studies of the Chinese population have been reported, we aimed to investigate the genetic variation of plakophilin-2 in ARVC patients from the Southern Region of China.

METHODSGenomic DNA was isolated from peripheral blood samples of all 34 ARVC patients, who were screened through a clinical evaluation. They were used to detect variations in the sequences of the plakophilin-2 genes by polymerase chain reaction amplification in combination with direct sequencing.

RESULTSIn exon-1 of the plakophilin-2 gene, a deletion mutation (c.145_148 del GACA) was found in one family pedigree. The mutation was also found in exon-2, 4, and 11 of the plakophilin-2 gene. The QT interval dispersion of the ECG was considerably longer in the mutation group than in the non-mutation group of ARVC patients, and this result was statistically significant (P < 0.05).

CONCLUSIONWe discovered a plakophilin-2 mutation that prolongs the QT interval dispersion in the southern Chinese ARVC population.

Adult ; Arrhythmogenic Right Ventricular Dysplasia ; genetics ; Asian Continental Ancestry Group ; genetics ; Child ; China ; DNA Mutational Analysis ; Exons ; genetics ; Genetic Predisposition to Disease ; Humans ; Male ; Middle Aged ; Mutation ; Pedigree ; Plakophilins ; genetics

Pedestrian distraction is one of the important risk factors of road injury. This review summarized the epidemiological characteristics, influencing factors, safety implications, and the published intervention measures. The review found that: a) the prevalence of pedestrian distraction poses a serious threat to pedestrian safety, but most epidemiological studies on pedestrian distraction focus on mobile phone use, and the incidence of pedestrian distraction varied greatly across studies using various research methods and from different countries; b) demographic characteristics, social psychology, and environment are the three main influencing factors of pedestrian distraction; c) distraction differently affected physiology, cognition, motion control, efficiency and behavior of pedestrian's street-crossing to some degrees, threatening the safety of pedestrian; d) engineering interventions and education were the most common interventions to prevent pedestrian distraction currently, but the effectiveness of most measures was not assessed rigorously. In the future, multidisciplinary and systematic epidemiological studies are recommended to design interventions purposely and evaluate the effectiveness of interventions through rigorous designs, providing scientific evidence for reducing pedestrian distraction and improving road safety of pedestrians.
Accidents, Traffic/prevention & control* ; Humans ; Pedestrians/psychology* ; Risk Factors ; Safety ; Walking

OBJECTIVETo study the microsatellite abnormalities of the aromatic amine exposure-associated transitional cell carcinoma (TCC) and sporadic TCC of urinary bladder, and to evaluate the potential of microsatellite analysis on detection of this diseases.

METHODSBased on our previous investigations, 5 microsatellite markers (D17S695, D9S162, D3S1295, DBH and D3S1234) that had high frequencies of loss of heterozygosity (LOH) in sporadic TCC, were selected for analysis with the bladder lesions derived from 16 patients with aromatic amine exposure history. The microsatellite analysis with urine sediments from the post-operated patients was also carried out.

RESULTSThere was at least one informative marker out of the 5 microsatellite foci showed polymorphism in the DNA derived from 16 patients examined. Within 87.50% (14/16) patients, LOH was detected in the bladder lesions at least with one microsatellite marker. The LOH frequency of D3S1295 was higher in occupational TCC patients than that in sporadic TCC patients. The diagnostic accordance rate of patients showed LOH in at least one microsatellite marker with patients diagnosed by pathology was 81.25% (13/16). In the urine sediments from 8 TCC post-operated patients, LOH was found at least with one microsatellite marker.

CONCLUSIONThere could be a different LOH pattern in aromatic amine exposure-associated TCC, and genes near D3S1295 might play a role in the occupational exposure-associated TCC.

Carcinoma, Transitional Cell ; genetics ; pathology ; Humans ; Hydrocarbons, Aromatic ; toxicity ; Microsatellite Repeats ; Occupational Exposure ; Urinary Bladder Neoplasms ; genetics ; pathology

Occult hepatitis B virus (HBV) infection status of blood donors in a southern city in China was investigated by immunological assays and nucleic acid testing. Overall, 17 (0.19%, 95% CI: 0.11%-0.30%) of the 9023 HBsAg negative samples were found to be positive for the presence of HBV DNA. "A" epitope sequences were obtained from 14 among them. Mutation(s) in aa124-aa147 existed in 6 (42.9%, 6/14) samples and 4 (66.7%, 4/6)were G145R mutation. Ratio of genotype C in occult donors (10/17) was statistically higher than HBs-positive donors (0/15, P<0.01), which implied that HBV genotype C leaded to occult infection more easily.
Adolescent ; Adult ; Blood Donors ; China ; epidemiology ; DNA, Viral ; genetics ; Female ; Genotype ; Hepatitis B ; epidemiology ; immunology ; virology ; Hepatitis B Surface Antigens ; genetics ; immunology ; Hepatitis B virus ; classification ; genetics ; immunology ; physiology ; Humans ; Immunologic Tests ; Male ; Mutation ; Sequence Alignment ; Sequence Analysis, DNA ; Young Adult

OBJECTIVE: To observe the effect of buccal acupuncture on pain after lumbar spinal fusion. METHODS: Sixty patients undergoing lumbar spinal fusion were randomly divided into an observation group (30 cases, 1 case dropped off) and a control group (30 cases, 1 case was eliminated). The patients in the control group were treated with routine anesthesia. On the basis of the control group, the patients in the observation group were treated with buccal acupuncture at bilateral back point, waist point, and sacral point for 30 min per treatment. The first acupuncture was given before anesthesia induction, and then once a day postoperation for two days, totally 3 treatments. The dosage of sufentanil, the number of remedial analgesia, and the incidence of nausea and vomiting within 48 h after surgery were compared between the two groups; rest and motion visual analogue scale (VAS) scores at 2 (T1), 8 (T2), 12 (T3), 24 (T4), and 48 (T5) h after surgery were observed; the quality of recovery-15 scale (QoR-15) at 24 and 48 h after surgery were evaluated. RESULTS: The dosage of sufentanil and the number of remedial analgesia within 48 h after surgery in the observation group were lower than those in the control group (P<0.01). There was no significant statistically difference in rest and motion VAS scores between the two groups in T1, T2, T3, T4 and T5 (P>0.05). The QoR-15 scores in the observation group at 24 and 48 h after surgery were higher than those in the control group (P<0.01). The incidence of nausea in the observation group was lower than that in the control group (P<0.05). CONCLUSION Buccal acupuncture could reduce the amount of postoperative analgesic drugs of patients after lumbar spinal fusion, and promote early postoperative recovery.
Humans ; Spinal Fusion/adverse effects* ; Sufentanil ; Acupuncture Therapy ; Pain Management ; Pain ; Nausea

BACKGROUND: Particulate matter (PM) < 2.5 μm (PM METHODS: We obtained DNA methylation and exercise data of 496 participants (aged between 30 and 70 years) from the Taiwan Biobank (TWB) database. We also extracted PM RESULTS: DLEC1 methylation and PM CONCLUSIONS We found significant positive associations between PM
Adult ; Aged ; Air Pollutants/adverse effects* ; DNA Methylation/drug effects* ; Environmental Exposure/adverse effects* ; Exercise ; Female ; Humans ; Male ; Middle Aged ; Particulate Matter/adverse effects* ; Taiwan ; Tumor Suppressor Proteins/metabolism*

Adult ; China ; Female ; Humans ; Incidence ; Male ; Middle Aged ; Substance Abuse Treatment Centers ; statistics & numerical data ; Substance-Related Disorders ; therapy ; Surveys and Questionnaires ; Violence ; statistics & numerical data

China/epidemiology* ; Morbidity