Loop-mediated isothermal amplification (LAMP) is a novel in vitro nucleic acid amplification method conducted under isothermal conditions with the advantages of high specificity, sensitivity, rapidity and easy detection. Since it was established in 2000, it has been widely applied in various fields of analytical science including the diagnosis of a variety of pathogens, identification of embryo sex, detection of genetically modified organisms and cancer gene identification. Additionally, significant progress has been made in the optimization of the LAMP method, such as accelerated reactions, simplified sample processing, the realization of multiplex amplification, and the enhanced specificity of reaction and detection methods. LAMP technology also shows much potential to be adopted as part of point-of-care testing platforms by the micromation, automation and integration with other technologies such as Lab-on-a-Chip and digital nucleic acid amplification. This review summarizes the latest advances in the LAMP technique and its applications in developing point-of-care testing platforms.
Diagnostic Techniques and Procedures ; trends ; Humans ; Nucleic Acid Amplification Techniques ; methods ; Point-of-Care Systems ; trends ; Virus Diseases ; diagnosis ; virology ; Viruses ; genetics ; isolation & purification

Bacteria ; drug effects ; Communicable Diseases, Emerging ; epidemiology ; microbiology ; Drug Resistance, Bacterial

Objective To evaluate a serf-designed diagnostic protoeol which can early detect a femoral neck fracture for patients with a femoral shaft fracture. Methods From September 2005 to June 2007, a self-developed protocol was used to detect an ipsilateral femoral neck fracture for all the patients with femoral shaft fracture who had sought treatment in our department. This protocol consisted of anteroposterior plain radiography of internal rotator, intraoperative fluoroscopy of the hip, a fine (2 mm) cut computed to-mographic scan through the femoral neck, postoperative anteroposterior and lateral plain radiography of the hip in the operating room prior to awakening the patient, at the time of follow-up anteroposterior and lateral plain radiography of the hip in the presence of hip pain. The diagnostic effects of the protocol were compared with those of conventional diagnosis used for all the patients with femoral shaft fracture who had sought treatment in our department from September 2003 to August 2005. A chi-square analysis comparing the protocol group (September 2005 to June 2007) and the non-protocol group (September 2003 to August 2005) was used to assess the early and delayed diagnosis rates for an associated ipsilateral femoral neck fracture. Results The earlydiagnosis rate of an associated femoral neck fracture by the protocol was 93.8%, markedly higher than that by conventional method (46.2%), with statistically significant difference (χ2 = 4.069, P =0.044). Conclu-sion In presence of a femoral shaft fracture. this protocol consisting of plain radiography of intemal rotator, intraoperative fluoroscopy of the hip, fine cut computed tomographic scan of the femoral neck, postoperative plain radiography of the hip, and follow-up plain radiography of the hip in the presence of hip pain, may sig-nificantly improve the diagnostic rate of an associated femoral neck fracture.

Two-factor factorial design refers to the research involving two experimental factors and the number of the experimental groups equals to the product of the levels of the two experimental factors. In other words, it is the complete combination of the levels of the two experimental factors. The research subjects are randomly divided into the experimental groups. The two experimental factors are performed on the subjects at the same time, meaning that there is no order. The two experimental factors are equal during statistical analysis, that is to say, there is no primary or secondary distinction, nor nested relation. This article introduces estimation of sample size and testing power of quantitative data with two-factor factorial design.

The glycosaminoglycan (GAG), isolated from Bay scallop Argopectenirradians, contains neutral monosaccharides besides hexosamines and hexosuronic acids. The monosaccharides obtained by alcoholysis with HCI-methylalcohol from the sample of GAG was trimethylsilanized with hexamethyldisilan and chlortrimethylsilan (HMDS ' TMCS = 2 : 1). And the trimethylsilyl derivatives of monosaccharides was determined by gas chro-matography. Compared the gas chromatography of the sample with that of standard monosaccharides, it was found that the GAG of the Bay scallop contains five neutral monosaccharides, viz glucose, galactose, xylose, fucose and rhamnose.

Objective To study the characteristics and differences of phonetic pronunciation between hearing-impaired and normal children in 4.5~5.5 years old groups. Methods Phonetic articulation of consonants and vowels were tested by three-grade assessors for 20 hearing- impaired children and 20 normal children in 4.5~5.5 years old group using Question Bank for Hearing-impaired Children's Rehabilitation Evaluation of Hearing and Speech. Results and Conclusion For hearing-impaired children, the consonants of /b. m. d. l. j/ were the most articulative, followed with /h. f. r. p. t. n. g. x/, and then /zh. z. k. c. sh. q. s. ch/; for normal children, the consonants of /b. p. f. g. m. d. h/ were the most articulative, followed with /k. j. x. t. r. l/, and then /q. zh. ch. sh. n. z. s. c/. For both groups, the single final was the most articulative, followed with the compound final, and then the nasal. The articulation of these 3 types of vowels were poorer in hearing-impaired children than in normal children (P<0.01)

OBJECTIVE:To compare the pharmacodynamics of active parts in crude Atractylodes lancea and A. lancea fired with bran. METHODS:170 rats were randomly divided into 17 groups,including blank control group,spleen and stomach damp obstruction model group,volatile oil of crude A. lancea and A. lancea fired with bran high-dose and low-dose(0.747,0.083 mg/ml by the concentration of crude medicinal materials,similarly hereinafter)groups,solvent control 2% polysorbate 80 group,dichlo-romethane extract of crude A. lancea and A. lancea fired with bran high-dose and low-dose groups,solvent control 1‰ polysorbate 80 group,n-butyl alcohol extract of crude A. lancea and A. lancea fired with bran high-dose and low-dose groups,solvent control stomach damp obstruction model distilled water control group. Except blank control group,other 16 groups were given Sennae foli-um decoction ig for 14 d to induce spleen and stomach damp obstruction model,and then received relevant medicine or solvent ig once a day for consecutive 7 d. Body weight of rats were determined before and after medication,and the serum levels of amylase, D-xylose,gastrin,vasoactive intestinal peptide and NO were determined after medication. RESULTS:Compared with spleen and stomach damp obstruction model group,the body weight and serum levels of gastrin,amylase and D-xylose increased significantly in rats of active part in A. lancea fired with bran groups(P<0.05),while vasoactive intestinal peptide and NO decreased signifi-cantly(P<0.05). Compared active part in crude A. lancea group,except the body weight,above indicators of active part in A. lan-cea fired with bran groups had greater change,with statistical significance (P<0.05). CONCLUSIONS:There are pharmacody-namic differences in the active parts between crude A. lancea and A. lancea fired with bran,the latter one is stronger.

OBJECTIVE:To systematically review the relationship of clinical efficacy between XPD Lys751Gln (A/C),XPD Asp312Asn(G/A)and platinum-based chemotherapy in patients with advanced non-small cell lung cancer(NSCLC),and provide evidence-based reference for clinical treatment. METHODS:Retrieved from PubMed, Cochrane Library, EMBase, Medline, CJFD,VIP database and WanFang database,studies about the effects of XPD Lys751Gln and XPD Asp312Asn polymorphism on ef-fectiveness,clinical outcomes and adverse drug reaction of platinum-based chemotherapy in advanced NSCLC patients were collect-ed,and Meta-analysis was performed by using Rev Man 5.3 software. RESULTS:Totally 30 studies were included,involving 5 028 patients. Genetic testing showed that XPD Lys751Gln divided into mutant gene (Lys/Gln + Gln/ Gln) and wild-type gene (Lys/Lys),while XPD Asp312Asn divided into mutant gene (Asp/Asn + Asn/Asn) and wild-type gene (Asp/Asp). Results of Me-ta-analysis showed,the progression-free survival (PFS) of Lys/Gln+Gln/Gln patients with platinum in XPD Lys751Gln polymor-phism was obviously lower than Lys/Lys patients [OR=-1.12,95%CI(-1.73,-0.50),P<0.001],while there was no significant difference in the chemotherapy effectiveness and total survival period. The effective rate of Asp/Asn+Asn/Asn patients for platinum in XPD Asp312Asn polymorphism was lower than Asp/Asp patients [OR=0.80,95%CI(0.68,0.96),P=0.02],while there was no significant difference in the total survival period and PFS. Meanwhile,the incidence of Ⅲ-Ⅳ level gastrointestinal adverse reac-tions of Lys/Gln+Gln/Gln with platinum in XPD Lys751Gln polymorphism was higher than Lys/Lys patients [OR=0.43,95%CI (0.20,0.94),P=0.03],and there was no significant difference in Ⅲ-Ⅳ level blood system adverse reactions. CONCLUSIONS:XPD Lys751Gln polymorphism may be associated with PFS and Ⅲ-Ⅳ level gastrointestinal adverse reactions for advanced NSCLC patients with platinum-based chemotherapy,while XPD Asp312Asn polymorphism may have effect on platinum-based chemotherapy,both of them may be as estimate the chemotherapy effect and prognosis detection index of platinum-based chemo-therapy.

Objective To explore the application value of cellular automata(CA)in simulating the epidemic spread of out-break of influenza A(H1N1).Methods The publications regarding influenza A(H1N1)from January 2009 to March 2015 were collected from the China National Knowledge Infrastructure(CNKI),epidemiological data of H1N1 were retrieved ac-cording to inclusion criteria,the Matlab 7.0 software was adopted to construct CA model for simulating and analyzing the epidemic of H1N1 occurred in a university in Chongqing between October 12 and November 20,2009.Results There were a total of 17 820 students in this university,the epidemic of influenza lasted 40 days in 2009;When the parameter,the ef-fective infection rate was 0.04,the model of CA fit well,and gave estimate for basic reproduction number (R0 )1.202. Conclusion CA has certain reliability in simulating epidemics of airborne infectious diseases,it can provide reference for the prevention and control of disease.