Objective To study the biological exposure limit in bone metabolism damage caused by coexposure to fluorine and arsenic from coal burning in exposed population.Methods One hundred and ninety-eight cases of fluoride and arsenic co-exposed people from Liuchang village,Qinzhen city,Guizhou province were enrolled in the study.Urinary fluorine (UF),urinary arsenic (UAs),urinary hydroxyproline (UHYP),ross-linked Ntelopeptides of type Ⅰ collagen(UNTX) and bone strength index(STI) were detected.BMDS Version 2.1 software was used to calculate UF,UAs benchmark dose (BMD) and its lower confidence limit (BMDL) on the damage of bone metabolism caused by co-exposure to fluorine and arsenic from coal burning.Results The BMD and BMDL range of UF caused by co-exposure to fluorine and arsenic from coal burning were 0.68-1.35 mg/g Cr,0.57-1.11 mg/g Cr.The BMD and BMDL range of UAs caused by co-exposure to fluorine and arsenic from coal burning were 8.36-18.77 μg/g Cr,7.12-15.40 μg/g Cr.Conclusion The biological exposure limits of UF and UAs for bone metabolism toxicity are proposed as 0.57 mg/g Cr and 7.12 μg/g Cr in co-exposure to fluoride and arsenic from coal burning,respectively.

OBJECTIVE: To establish a method of fingerprint position, sample transfer and fingerprint DNA extraction in contact samples. METHODS: Sixty-six cases were visualized by 502 glue fingerprint fumigation. Two methods, ordinary wipe and acetone wipe, were used to transfer cast-off cells of fingerprints from testing samples, respectively. DNA was extracted and purified by ultramicro magnetic bead kit. The data was resolved on genetic analysis after amplification. RESULTS: In 33 samples, 30 samples got better STR analysis by acetone wipe method. The peak range was 1,000-4,000 RFU and peak shapes were equable. It was hard to get ideal STR typing by ordinary wipe method. CONCLUSION The samples are visualized by 502 glue fingerprint fumigation and the case-off cells are transferred by acetone wipe method. The method shows better STR analysis result, which might be a better method for forensic science practice.
Adhesives ; DNA/isolation & purification* ; DNA Fingerprinting/methods* ; Forensic Medicine ; Fumigation/methods* ; Humans

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Child ; Female ; Humans ; Male ; Middle Aged ; Postoperative Complications ; epidemiology ; Tracheostomy ; adverse effects ; Young Adult

Objective To explore the change of nerve growth factors(NGF) through the blood brain barrier(BBB) after distal intravenous injection of mannitol into the experimental rats and the effect of exogenous NGF on the expression of growth associated protein-43 in hypoxic-ischemic brain.Methods One hundred cases of 7 days rats were divided into 2 units.One unit was divided into 3 groups:treatment group,control group and sham operated group,20 rats in each group.The other unit was divided into 4 groups:mannitol and NGF treated group,NGF treated group,control group,and sham operated group,there were 10 rats in each group.The model rats with perinatal hypoxic-ischemic brain damage(HIBD) rats were prepared by ligation of left common carotid artery with a temporary systemic hypoxia(inhaling 80 mL/L O2 and 920 mL/L N2).The sections of brains were processed by immunochemistry with antibodies against GAP-43,and the study and memory ability of rats were tested by maze test.The effect of osmotic opening of BBB on the facilitation of NGF′s passage was tested by ELISA.Results The expression of GAP-43 increased after NGF treatment,and the differences were remarkable(P

Objective To investigate the dose- and time-effects of astragaloside Ⅳ(XGA) on collagen of myocardial fibroblasts in rats.Methods The myocardial fibroblasts of rats were separated by collagenase and trypsinase digestive method,and the cell culture system was established. After XGA in different concentrations and at different time points was administered in fibroblast culture systems,the mRNA expression levels of collagen,matrix metalloproteinases(MMP)-1,-2,-9,tissue inhibitor of metalloproteinase(TIMP)-1 and -2 were measured with reverse transcription-polymerase chain reaction(RT-PCR) test.Results After XGA administration with different doses and at different time points was adminstered,the gel electrophoresis product of RT-PCR in fibroblast culture system expressed the mRNA of type Ⅰ,Ⅲ and Ⅳ collagens,MMP-1,-2,-9,TIMP-1 and -2;but the mRNA expression levels of type Ⅰ,Ⅲ and Ⅳ collagens,TIMP-1 and -2 decreased and the mRNA expression levels of MMP-1,-2,and -9 increased compared to those before XGA administration;the mRNA expression of type Ⅰ,Ⅲ and Ⅳ collagens,MMP-1,-2,-9,TIMP-1 and -2 decreased or increased gradually with the increase of doses and the prolonged time of XGA use.The mRNA expression levels of type Ⅰ,Ⅲ and Ⅳ collagens,TIMP-1 and -2 were negatively related to the doses and action times of XGA(r=-0.927 to -0.637 P= 0 to 0.024);and the mRNA expression levels of MMP-1,-2 and -9 were positively related to the doses and action times of XGA(r=0.672 to 0.962 P=0 to 0.034).Conclusion XGA can markedly reduce the collagen formation of myocardial fibroblasts in rats,and its mechanisms are related to the inhibiting of collagen synthesis and the increase of collagen degradation.

Objective To study the clinical significance of the serum angiopoietin-2(Ang-2) in the diagnosis,recurrence,invasion and metastasis of gastric cancer.Methods The serum Ang-2 and carcino-embryonic antigen (CEA) levels in 158 patients with gastric cancer (gastric cancer group) and 30 normal controls(control group) were measured by enzyme linked immunosorbent assay(ELISA) technique respectively.The serum Ang-2 and CEA levels were also measured 2 weeks after operation in gastric cancer group and reexamined in the recurred gastric cancer patients in 2 years after operation (recurred and metastasis group).The correlation between the serum Ang-2 level and pathologic c haracterization of gastric cancer was evaluated.Results The serum Ang-2 and CEA levels in gastric cancer group [ (331.8 ±64.3),(42.6 ±37.3)μg/L] and recurred and metastasis group [(318.7 ±72.9),(40.5 ±36.7)μg/L] were significantly higher than those in control group [ (187.4 ± 32.7),(4.2 ± 3.1 )μ g/L] (P ＜ 0.01 ),and the serum Ang-2 level 2 weeks after operation [ (211.6 ± 75.1 ) μ g/L ] was significantly decreased to the control group (P ＞ 0.05 ),while the serum CEA level [ (33.4 ± 30.6) μ g/L ] was still significantly higher than the control group (P ＜ 0.01 ).The sensitivity of the serum Ang-2 for diagnosis of gastric cancer was markedly higher than that of the serum CEA (P ＜ 0.01 ).There was correlation between serum Ang-2 and degree of tumor differentiation,TNM pathological staging,lymphatic metastasis,invasion depth and tumor size (p ＜0.01 ),but there was no correlation between serum Ang-2 and tissue classification and location of gastric cancer (P＞ 0.05).Conclusion The serum Ang-2 level is suggested to be a valuable gastric cancer marker and conduce to the diagnosis of gastric cancer,the monitoring of recurrence after operation and evaluation of prognosis.

Objective To evaluate the theraputic effect of transcatheter arterial chemoembolization (TACE)for hepatocellular carcinoma with tumor thrombosis of portal vein.Methods One hundred and six patients of hepatocellular carcinoma with tumor thrombosis of portal vein under treament of TACE were observed before and after the procedure.Results After TACE tumor size reduced＞50% in 23 patients,＜50% in 25, no significant change in 44.The size of tumor enlarged in 12.The disappearance of portal vein tumor thrombosis accessed in 14,with reduction in 39,and no significant change in 51.Two patients died within one week.Conclusion TACE provides good therapeutic effect on hepatocellular carcinoma with tumor thrombosis of portal vein.

Objective To explore the effect of fluoride and arsenic pollution on bone metabolism in exposed population. Methods One hundred and fifty-two fluoride and arsenic exposed people were selected from Jiaole village, Yuzhang town, Xingron county, Guizhou province in 2006, and 59 not exposed people from Daguoduo village 13 km away from Jiaole village were selected as control. Urinary fluorine(UF), urinary arsenic (UAs), urinary hydroxyproline (UHYP), cross-linked N-telopeptides of type I collagen (UNTX) and bone strength index(STI) were detected. Results The main effect of fluoride on UHYP and UNTX were statistically significant (F = 9.785, 4.225, P < 0.01 ), but was not significant on STI(F = 0.183, P > 0.05). The main effect of arsenic on UNTX was statistically significant (F = 2.660, P < 0.05 ), but was not significant on UHYP and STI(F = 2.012, 0.183,all P > 0.05). The interaction between fluoride and arsenic on UNTX was statistically significant (F= 2.429, P <0.01), but was not significant on UHYP and STI(F= 1.218, 1.001, all P> 0.05). Conclusions Fluoride exposure can affect the metabolism of collagen and bone resorption, and Arsenic exposure main affect bone resorption, fluoride and arsenic co-exposure have more significant effect on bone resorption. UNTX may be used as biological biomarker of bone metabolism for population co-exposed to fluoride and arsenic in health monitoring.

A new cadinane-type sesquiterpenoid, pogocablene P (1), and a new natural product with cyclohexanone skeleton, pogocablone A (2), were isolated from the EtOAc soluble fraction of the aerial parts of Pogostemon cablin by several chromatographic methods, such as silica gel, Sephadex LH-20, ODS and high performance liquid chromatography (HPLC), and so on. Their structures were identified by means of mass spectrometry and nuclear magnetic resonance spectroscopy. In addition, the absolute configuration of compound 2 was determined by electronic circular dichroism (ECD) calculation. Furthermore, the anti-influenza virus and anti-inflammatory activities of compounds 1 and 2 were evaluated.

The applicator therapy is a unique method to treat infant diarrhea in traditional Chinese medicines and widely applied in clinical practice. Currently, many researchers have proved the rationality of the therapy based on the traditional Chinese medicine mechanism and on the data from clinical practice, but its action mechanism is uncertain at present. In this study, with the assistance of pediatric practitioners, the automated ribosomal intergenic-spacer analysis (ARISA) was adopted to study the effect of the adjuvant therapy with Dingguier umbilical paste on intestinal flora of diarrhea infants, in which Dingguier umbilical paste served as the adjuvant therapy in oral traditional Chinese medicines and fecal samples of infants with different diarrhea symptoms were collected and used as the study materials. The results showed that the adjuvant therapy had a significant effect on the shift of intestinal flora, which was associated with the decrease in the similarity difference to the normal control group and the increase in the number of operational taxonomic units (OTUs) shared with the normal control group. Additionally, adjuvant therapy with Dingguier umbilical paste also showed long action duration and increased OTUs number. These results indicated that Dingguier umbilical paste has the effect in restoring the micro-ecosystem of unbalanced intestinal bacteria. Intestinal flora may be one of major targets for the applicator therapy for the infant diarrhea, but not for the single oral traditional Chinese medicine for infant diarrhea.
Adjuvants, Pharmaceutic ; therapeutic use ; Diarrhea ; drug therapy ; microbiology ; Feces ; microbiology ; Female ; Humans ; Infant ; Intestines ; drug effects ; microbiology ; Male ; Medicine, Chinese Traditional ; methods ; Ointments ; Treatment Outcome ; Umbilicus