An oxygen-tolerant denitrifying strain designated as H1 was screened by the procedures of shallow shaking and continuous aeration cultures.With the aid of an nnrS-gfp fusion responsive to nitric oxide (NO)and acetylene inhibition-GC procedure,it was shown that strain H1 was able to produce NO and N_2O but not N_2 under denitrifying conditions.Denitrifying processes were thus determined as NO_3~-→NO_2~-→NO→N_2O,with N_2O as the end product.Strain H1 could denitrify under shallow shaking conditions as well as in the initial atmospheric oxygen concentration ranging from 0～21%.Denitrification processed normally under continuous aeration at the rate of 2 L air per min in a 150 mL medium,but stopped under high aeration rate as 5 L air per min.16S rRNA gene sequence revealed that strain H1 shared 98% similarity to its closet relative Ralstonia taiwanensis,the genus where denitrifying bacteria are frequently found.

Objective To investigate the distribution status of coal-burning fluorosis (endemic fluorosis) areas in Luoyang and to provide scientifc evidence for making strategies in prevention and control. Methods In 2006, a household per village was chosen to carry the general survey so as of disease condition, living habits and housing structure among 941 coal-burning pollution fluorine sickness natural villages in Yanshi, Mengjin, Xin'an, Luanchuan counties and Geely area which were under the jurisdiction of Luoyang. In the general survey, the sampled village having a population of more than 500 person was considered as a major survey village, and water fluoride, 8 - 12 year-old child fluorine spot on tooth and the urinary fluoride were surveyed. Water fluoride and the child urinary fluoride determination used the fluoride ion selective electrode method, and the children's dental fluorosis used Dean method. Results The endemic fluorosis of Luoyang existed 742 in endemic fluomsis villages, compared with history, a decrease of 199 in number. Ninety-six point seven per cent( 142 543/147 419) of the households were consuming smoke-free coal. Households using intact kitchens accounted for 93.6%( 137 919/147 419). Of which 63.0%(86 889/137 919) of kitchens were mixed up with bedrooms. Total 125 060 people were using coal- fired furnace for heating, of which 87.8%(109 802/125 060) had smoke-free facilities, 12.2%(15 258/125 060) had none. Among 52 endemic villages with population of more than 500 people surveyed, a total of 183 water samples were collected, 2 had water fluoride exceeding 1.0 rag/L, the highest water fluoride being 1.04 rag/L, averaging 0.39 mg/L Sixteen villages had a prevalence rate of dental fluorosis for children less than 30.00%, accounting for 30.8% (16/52), 36 endemic villages the prevalence of dental fluorosis detection rate of more than 30.00%, accounting for 69.2%(36/52). Twenty-thrce villages had a dental fluorosis index greater than 0.6, severe dental fluorosis was not found. Real-time measurement of 1408 urine samples of children aged 8 - 12 showed that urine fluoride highest value 6.88 nag/L, the minimum value of 0.10 mg/L, geometric mean 1.10 mg/L. The prevalence rate of dental fluorosis for children was 36.06%. Conclusions In Luoyang city, numbers of coal-burning endemic fluorosis villages are less than before, children's dental fluorosis has significantly declined, however some people still use kitchens connecting with bedrooms and lack smoke-free facilities, they need to be educated to change lifestyle and improve furnace to reduce soot fluoride pollution.

Amifostine ; pharmacology ; Animals ; Benzene ; toxicity ; Blood ; drug effects ; Blood Cell Count ; Male ; Mice ; Random Allocation

To study on the effects of Achyranthes bidentata on Tongsaimai pellets main active ingredients chlorogenic acid, isoliquiritin, harpagoside and glycyrrhizin in rats in vivo pharmacokinetic behaviors, a method for the simultaneous determination of chlorogenic acid, isoliquiritin, harpagoside and liquiritigenin in rat plasma was established by UPLC-MS/MS. The analysis was performed on a waters Acquity BEH C18 column (2.1 mm x 100 mm, 1.7 microm) with the mixture of acetonitrile and 0.1% formic acid/water as mobile phase, and the gradient elution at a flow rate of 0.3 mL x min(-1). The analytes were detected by tandem mass spectrometry with the electrospray ionization (ESI) source and in the multiple reaction monitoring (MRM) mode. It turned out that the analytes of Tongsaimai pellets groups C(max) and AUC(Q-infinity) values were higher than that with A. bidentata group, and the C(max) values of chlorogenic acid had significantly difference (P < 0.05), the AUC(0-infinity) values of chlorogenic acid and glycyrrhizin had significantly difference (P < 0.05); The T(max) and CL values of two groups had no significantly difference. Results showed that the established method was specific, rapid, accurate and sensitive for the studies of Tongsaimai pellets four main active ingredients in rat in vivo pharmacokinetic, and A. bidentata have varying degrees of effects on Tongsaimai pellets four main active ingredients in rat in vivo pharmacokinetic behaviors.
Achyranthes ; chemistry ; Animals ; Chalcone ; administration & dosage ; analogs & derivatives ; blood ; pharmacokinetics ; Chlorogenic Acid ; administration & dosage ; blood ; pharmacokinetics ; Drugs, Chinese Herbal ; administration & dosage ; pharmacokinetics ; Glucosides ; administration & dosage ; blood ; pharmacokinetics ; Glycosides ; administration & dosage ; blood ; pharmacokinetics ; Glycyrrhizic Acid ; administration & dosage ; pharmacokinetics ; Herb-Drug Interactions ; Male ; Pyrans ; administration & dosage ; blood ; pharmacokinetics ; Rats ; Rats, Sprague-Dawley ; Tandem Mass Spectrometry

Objective To explore the effect of traditional incision and drainage combined with vacuum sealing drainage (VSD)in treating patients with purulent exudation-staged genual septic arthritis. Methods The patients with purulent exuda-tion-staged genual septic arthritis were selected in the Zhengzhou Orthopedics Hospital from January 2010 to December 2015, and they were divided into control group and observation group. Fifty-four patients in the control group were treated with open operative drainage,while fifty patients in the observation group were treated with open operative drainage combined with VSD. The operation time,intraoperative bleeding volume,tourniquet application time,washing time,antibiotic use time,hospitalization time,therapeutic effect and relapse rate were compared between the two groups. Results There was no statistical difference in operation time and tourniquet application time and intraoperative bleeding volume between the two groups(t = - 0. 216,2. 518, 11. 320;P > 0. 05). Compared with the control group,the antibiotic use time and hospitalization time were shorter,the washing time was longer in the observation group(t = 2. 270,- 46. 310,2. 518;P < 0. 05). The occurrence rate of postoperative compli-cations in the control group and the observation group was 9. 3％(5 / 54)and 6. 0％(3 / 50),there was no statistical difference in the occurrence rate of postoperative complications between the two groups(χ2 = 0. 331,P > 0. 05). The fineness rate in the control group and the observation group was 25. 9％(14 / 54)and 22. 0％(11 / 50),there was no statistical difference in the fineness rate between the two groups(χ2 = 0. 219,P > 0. 05). The relapse rate in the control group and the observation group was 33. 3％(18 / 54)and 8. 0％(4 / 50),the relapse rate in the observation group was lower than that in the control group (χ2 =0. 331,P <0. 05). Conclusion Traitional incision and drainage combined with VSD has advantages of shortening hospital-ization and intravenous antibiotic time and decreasing relapse rate in treating purulent exudation-staged genual septic arthritis.

Objective To evaluate the clinical significance of CT angiography(CTA)in the diagnosis of arterioportal shunts(APS)associated with hepatocellular carcinoma(HCC).Methods One hundred and twenty-seven consecutive HCC patients accepted both dynamic enhancement CT and DSA examinations.The interval between CT and DSA exam was from 3 to 15 days.Based on transverse CT images in hepatic artery phase,CTA was performed for all the patients.By contrast with DSA results,the capabilities of transverse CT and transverse images combined with CTA in APS diagnosis were analyzed. Results In all 127 HCC cases,52 cases with APS were confirmed by DSA(40.94%),33 with central type of APS and 19 with peripheral type.Diagnostic sensitivity of APS based on transverse CT and combined CTA with transverse CT images were both 94.23%(49/52).However,specificity was 84.00%(63/75) and 97.33%(73/75),respectively,accuracy was 88.19%(112/127)and 96.06%(122/127),the predictive value of positive cases was 80.33%(49/61)and 96.08%(49/51),and the predictive value of negative cases was 95.45%(63/66)and 96.05%(73/76).Combined with CTA,false positive cases of 4 central type of APS and 6 peripheral type of APS were excluded which were demonstrated by transverse CT images.By contrast with DSA,the coincidence rate of the type of APS diagnosed by transverse images combined with CTA was 88.46%(46/52),including 90.91%(30/33)of central type of APS and 84.21%(16/19)of peripheral type.The supplying arteries of central type of APS were intuitively displayed by CTA in 23 cases,19 from proper hepatic artery and 4 from gastro-duodenal artery.Conclusion CTA techniques based on the dynamic enhancement CT exams could effectively promote the specificity and the accuracy of APS diagnosis.

OBJECTIVETo investigate whether the functional polymorphisms in the promoter region of MMP-12 (-82A/G) and MMP-13(-77A/G) are associated with epithelial ovarian carcinoma (EOC).

METHODSThe MMP-12 -82A/G and MMP-13 -77A/G were genotyped by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) in 300 epithelial ovarian carcinoma patients and 300 control women.

RESULTSThe A/G genotype frequency of the MMP-12 gene was significantly higher in the patients than in the controls (P= 0.003); similarly, the frequency of MMP-12 -82G allele was higher in the patient group (P= 0.004). Compared with the A/A genotype, the A/G genotype carriers significantly increased the risk of EOC development (OR= 2.81, 95%CI: 1.38-5.74). No overall association between the MMP-13 -77A/G polymorphism and EOC(P= 0.15) was observed. However, the A/A genotype carriers in the MMP-13 -77A/G locus had significantly higher risk of developing serous-papillary and mucinous ovarian cancer (OR= 1.93, 95% CI: 1.05-3.53; OR= 5.16, 95% CI: 1.62-16.44, respectively), comparing with the G/G genotype carriers. Combining the two SNPs, the haplotype distributions in patients were not significantly different from that in control women (P= 0.06).

CONCLUSIONThese results suggested that individuals with MMP-12 -82A/G and MMP-13 -77A/A might have higher risk of overall or special histological type of EOC development.

Adult ; Aged ; Female ; Gene Frequency ; Genetic Predisposition to Disease ; Genotype ; Humans ; Matrix Metalloproteinase 12 ; genetics ; Matrix Metalloproteinase 13 ; genetics ; Middle Aged ; Neoplasms, Glandular and Epithelial ; genetics ; Ovarian Neoplasms ; genetics ; Polymorphism, Single Nucleotide ; Promoter Regions, Genetic ; genetics ; Young Adult

AIMTo study the active constituents of Swertia davidi Franch..

METHODSChromatography was used to isolate and purify the chemical components, their structures were identified by spectral analysis.

RESULTSThree compounds were identified as 1,7-dihydroxy-3,8-dimethoxyxanthone (gentiacaulein) (V), 1,8-dihydroxy-3,7-dimethoxyxanthone (methylswertianin) (VI) and 1,8-dihydroxy-3,4,7-trimethoxyxanthone (VII).

CONCLUSIONCompound VII is a novel xanthone, named daviditin A, the others were isolated from Swertia davidi Franch. for the first time.

Molecular Structure ; Plants, Medicinal ; chemistry ; Swertia ; chemistry ; Xanthones ; chemistry ; isolation & purification

OBJECTIVETo study the clinical features and gene mutations of 4 Chinese children with Dent disease.

METHODSThe clinical and laboratory data of 4 children with Dent disease were analyzed retrospectively. Genetic testing of the 4 cases was carried out.

RESULTSAll of 4 cases were boys. The first impression of Cases 1-3 was Fanconi syndrome. Proteinuria was presented as the first impression in Case 4. All 4 boys presented with low-molecular weight proteinuria (LMWP) and hypercalciuria, including 3 cases with hematuria, 1 case with kidney stones, 2 cases with nephrocalcinosis, 3 cases with hypophosphatemia, and 3 cases with rickets. Mutations of the CLCN5 gene were revealed in three patients (Cases 1, 2 and 4), including exon 6-7del, c.785_787de l(p.263del Leu) and c.1039 C>T (p.Arg347Term). The first two gene mutations had never reported before.

CONCLUSIONSUrine protein electrophoresis should be carried out for patients with proteinuria. Dent disease should be taken into consideration when patients with Fanconi syndrome have hypercalciuria, nephrocalcinosis or kindey stones. Genetic analyses are needed for a definite diagnosis.

Child ; Child, Preschool ; Chloride Channels ; genetics ; Dent Disease ; drug therapy ; genetics ; Humans ; Mutation ; Phosphoric Monoester Hydrolases ; genetics

BACKGROUND: Umbilical cord mesenchymal stem cells (UC-MSCs) are a group of cells that have self-renewal, highly proliferative and multidrug differentiation potential. The properties of UC-MSCs and their tumor tropism make them an ideal tool for glioma cell therapy. These cells can act by paracrine or as a delivery system for genes and drugs. It has been demonstrated that UC-MSCs can inhibit the growth of glioma and improve the survival after transplantation into the brain. OBJECTIVE: To summarize the molecular mechanisms and safety of UC-MSCs in the treatment of glioma and to provide a useful reference for further research. METHODS: We searched the PubMed and CNKI databases from 2000 to 2017 with the English terms of "glioma; umbilical cord mesenchymal stem cells" and the Chinese terms of "glioma; umbilical cord mesenchymal stem cells; safety; molecular mechanism". Based on the inclusion and exclusion criteria, 55 articles were finally reserved for review. RESULTS AND CONCLUSION: UC-MSCs have obvious effect on treating glioma. These cells can treat glioma through homing mechanism and paracrine mechanism as gene carrier and co-culture. Moreover, UC-MSCs have certain safety in the treatment of glioma.