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

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.

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.

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.

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

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 investigate the clinical therapeutic effect of Chaishi fever particles on patients with epidemic encephalitis B and to study the machanism of anti-inflammatory.Methods One hundred and twenty one patients with epidemic encephalitis B admitted to the Second Clinical Medical College of Henan University of Chinese Medicine from January 2014 to May 2017 were enrolled, and they were divided into a routine treatment group (60 cases) and a traditional Chinese medicine (TCM) treatment group (61 cases) by random number table. The patients in routine treatment group were given symptomatic support and comprehensive treatment for 15 days, while those in the TCM treatment group were given as that of routine group with the addition of Chaishi fever particles 8 g, 4 times every day, orally taken for consecutive 15 days. The levels of tumor necrosis factor-α (TNF-α), interleukin (IL-1β, IL-10) in the serum of two groups were determined by enzyme-linked immunosorbent assay (ELISA), and the clinical therapeutic effect, complications and sequelae in two groups after treatment were observed.Results Compared with the routine treatment group, after treatment the time of body temperature recovering normal (days: 5.8±1.2 vs. 7.5±1.7), the coma time (days: 5.5±1.3 vs. 6.8±1.6), the remission time of convulsion (days: 5.2±1.4 vs. 6.5±1.5), and the length of stay in hospital (days: 22.6±1.9 vs. 25.2±1.8 ) were significantly shorter in TCM treatment group (P < 0.05). After treatment, the levels of serum tumor TNF-α and IL-1β were decreased, IL-10 was increased in both groups, moreover, compared with the routine treatment group, the changes were more obvious in TCM treatment group [TNF-α (μg/L): 11.4±3.6 vs. 14.6±3.5, IL-1β (μg/L): 22.3±6.2 vs. 26.2±5.6, IL-10 (μg/L): 225.2±19.2 vs. 186.2±21.5, allP < 0.05]. In addition, compared with the routine treatment group, the total effective rate was higher [98.3% (60/61) vs. 90.0% (54/60),P < 0.05], and the incidence of sequelae was lower [1.64% (1/61) vs. 13.3% (8/60),P < 0.05] in TCM treatment group.Conclusion The Chaishi fever particles can effectively treat the patients with epidemic encephalitis B and the action is related to the inhibition of inflammatory reaction.

The variation of blood glucose in 1 147 patients with type 2 diabetes mellitus was monitored by continuous glucose monitoring system(CGMS). The results showed that the peak hours of nocturnal hypoglycemia occurred during 22 : 00-2 : 00. The incidence of nocturnal hypoglycemia was negatively correlated with mean blood glucose and blood glucose at three hours after supper. The probability of hypoglycemia was up to 50% when blood glucose level had been as low as 4. 7 mmol/L at 3 h after supper.

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.