Objective To study the real releasing of fluorine (F) and its effects on environmen in coalburning-borne fluorosis areas.Methods The coal,clay,briquette,cinder,fresh corn and roasted corn samples from 24 households were collected systematically in Zhaotong of City,Yunnan Province,and the F concentration in all samples was measured using the combustion hydrolysis/fluoride-ion selective electrode method,and the released amount and rate of F in briquette was calculated,and the relation between the released amount of F from briquette and the increase of F in roasted corn was analyzed.Results The F concentration of clay ranged from 266.4 to 2 536.7 mg/kg with a median of 1 087.1 mg/kg;the F concentration of briquette ranged from 115.9 to 635.0 mg/kg with a median of 308.8 mg/kg.The released amount of F in briquette ranged from 63.5 to 432.2 mg/kg with a median of 248.2 mg/kg.The releasing rate of F in briquette ranged from 30.3％ to 91.5％ with a average of 73.8％.The F concentration in fresh corn ranged from 0.43 to 2.00 mg/kg with a median of 1.31 mg/kg;the F concentration in roasted corn ranged from 2.21 to 44.88 mg/kg with a median of 10.49 mg/kg.The increased amount of roasted corn ranged 0.90 to 44.46 mg/kg.There was a significant correlation between the emission amounts of F from briquette and the F concentration in binder clay (r =0.714,P ＜ 0.01),but no correlation between the released amount of F from briquette and the increasing of F in roasted corn (r =-0.155,P ＞ 0.05).Conclusion The clay is an important source of F pollution,and the F increase in roasted corn is not only determined by the released amount of F in briquette,but also by several factors.

Objective To explore acute cerebral vascular accident factors in patients with nosocomial infection. Methods Clinical data with 680 cases with acute cerebral vascular accident were retrospectively analyzed,and the patients with hospital flu infected as the observation group, selected in accordance with 1 ∶ 1 over the same period without cerebrovascular accident combined hospital patients feel as control group. The patient age,gender,state of consciousness , invasive operation, dehydrating agent application time, whether use of antibiotics and other differences were compared . Results In 680 cases of patients with acute cerebral vascular accident, there were 90 cases of hospital infection; two groups gender, dehydrating agent application time had no difference(P ＞ 0. 05 ); the observation group compared with the control group older, unconscious, to implement invasive operation to prevent high proportion of antibiotics(P ＜0. 05), hospital infection-related factors. Conclusion Acute cerebral vascular accident patients should have a higher incidence of nosocomial infection, and be related with many factors. Taking corresponding measures against the relevant factors could prevent hospital infection.

Objective To analyze the risk factors and clinical outcome of contrast induced nephropathy (CIN) in patients with coronary artery disease (CAD) after percutaneous coronary intervention (PCI) and discuss its prevention.Methods Fifty-four patients with CIN among 729 patients who received PCI were retrospectively studied and the related risk factors,cardiovascular events and preventive strategy were analyzed.Results CIN was strongly associated with pre-procedure chronic renal failure,diabetes mellitus and large-dose contrast.The incidence of cardiac mortality and major adverse cardiac events 1 year after PCI in CIN group was higher than that in group without CIN.Conclusion Chronic renal failure,diabetes mellitus and dosage of contrast agent were three independent risk factors of CIN.CIN could affect the patients' prognosis.A well overall perioperative management of CAD patients following PCI,especially hydration therapy,is the most important strategy for prevention of CIN .

Objective Several surgical procedures are available for treatment the prominent mandibular angle. But in some patients, only one procedure is not likely to obtain satisfactory results. This study was to evaluate the effect of curved osteotomy combined with sagittal splitting osteotomy of the mandibular angle by an intraoral approach for treatment the broad lower face. Methods 21 patients with broad lower face were treated with mandibular angle osteotomy plus mandibular angle splitting osteotomy under general aesthesia by intraoral approach. Changes of the distance between the mandibular angles were observed during follow up phase. Questionnaires were used to assess the patents level of satisfaction after operation. Results All the wounds healed without complications of bleeding and infection. After 7 months to 12 months follow up, the distance between the mandibular angles was effectively reduced, the deformity of broad lower face were improved markedly, the curve of the mandibular angle was smooth and the shape was natural. Conclusion This method is worthy to be applied widely because of the good result with effective reduction of the width of the lower face, smooth and gentle outline of the face.

BACKGROUND: The traditional treatment for skin donor site wound was focus on anti-infection and wound protection, which roof a long time for healing. Studies demonstrated that recombinant human epidermal growth factor (rhEGF) has accelerated effect or epidermal regeneration. OBJECTIVE: To observe the effect of rhEGF on wound healing of skin donor site. METHODS: A total of 32 cases needs wound healing by skin grafting were collected, including 18 males and 14 females. The 32 skin graft donor site wounds were randomly divided into control and treatment groups. In the treatment group, the absorbent gauze was sprinkle soaked with rhEGF (15 mL/ramus, 2 000 IU/mL) and covered the donor site, twice per day. In the control group, donor site was covered by physiological saline gauze and wrapped with dressing, twice per day. After 48 hours, semi-exposed therapy was performed. The healing time of wounds, the systemic and local adverse reactions of patients and blood routine examination and renal function detection prior to and after treatment were observed. RESULTS AND CONCLUSION: The healing time of wound in the rhEGF treatment group was shorter than that in the control group with significant differences (P < 0.01). No Adverse events or side effects were observed in the rhEGF treatment group. rhEGF can shorten wound healing time, reduce scar hyperplasia, and accelerate epithelization at the graft donor.

Objective To investigate the partial safety of the recombinant adenovirus containing the triple-point mutants HIF-1αgene (Ad-HIF-1α-Trip)transfection in a rabbit model of hind limb ischemia. Methods After ligation of left femoral artery, 22 New Zealand whites rabbits were randomly divided into 3 groups: saline group(n=6), Ad-Null group(n=6) and Ad-HIF-1α-Trip group(n=10). After operation, saline, Ad-Null and Ad-HIF-1αwere injected intramuscularly respectively. The expression of transferred HIF-1αat mRNA level in the ischemic skeletal muscle and other important organs were detected by Real-time PCR 10 days after gene transfection. The body temperature, weight, blood, liver and renal function, as well as the myocardial enzymes were detected before operation, and on the 3th, 7th, 14th and 28th day after gene transfection, so that pathological changes could be observed. Results On the 10th day after gene transfection, obvious expressions of HIF-1αat mRNA level in the ischemic limb were found, but no expression in other important organs was detected in Ad-HIF-1α-Trip group. The blood routine, liver and renal function were all in the normal range (P > 0.05). No abnormalities were found in heart, liver, kidney, and lung HE transfection in Ad-HIF-1α-Trip group. Conclusion Single intramuscular injection of Ad-HIF-1α-Trip can be expressed obviously in the ischemic limb without detected damage of liver , cardiac and kidney.

OBJECTIVETo investigate the effects of a recombinant adenovirus-mediated triple mutant hypoxia-inducible factor-1α (HIF-1α) on the proliferation and vascular endothelial growth factor (VEGF) expression in human microvascular endothelial cells (hMVECs).

METHODSThe adenovirus vector of the triple mutant HIF-1α (Ad-HIF-1α(564/402/803)), adenovirus vector of wild-type HIF-1α (Ad-HIF-1α(nature)), Ad-lacZ and Ad-Null were amplified in HEK293A cells, and the adenoviruses were purified and titrated. Dual luciferase reporter assay system was employed to detect the transcriptional activities of wild-type and triple mutant HIF-1α. After infection of the hMVECs with the adenoviruses, the cellular protein expressions of HIF-1α and VEGF were detected using Western blotting, and the cell proliferation was assessed by MTS assay.

RESULTSThe transcriptional activity of the triple mutant HIF-1α was significantly higher than that of wildtype HIF-1α in the infected hMVECs (P<0.001). The protein levels of HIF-1α and VEGF in cells infected with Ad-HIF-1α(564/402/803) were significantly higher than those in cells infected with other adenoviruses, and HIF-1α dose-dependently up-regulated VEGF protein expression. The absorbance was significantly higher in Ad-HIF-1α(564/402/803) group than in the other groups (P<0.01) on the third and fifth days after infection.

CONCLUSIONThe recombinant adenovirus-mediated triple mutant HIF-1α expression is stable under normoxic condition. The triple mutant HIF-1α can up-regulate the expression of VEGF protein in hMVECs to promote the cell proliferation.

Adenoviridae ; genetics ; Cell Proliferation ; Endothelial Cells ; cytology ; metabolism ; Endothelium, Vascular ; cytology ; Genetic Vectors ; HEK293 Cells ; Humans ; Hypoxia-Inducible Factor 1, alpha Subunit ; genetics ; pharmacology ; Microvessels ; cytology ; Recombinant Proteins ; genetics ; Transfection ; Vascular Endothelial Growth Factor A ; metabolism

OBJECTIVETo investigate the roles of ceruloplasmin (Cp) in PI3K/PTEN cell signaling pathway change in human embryonic lung fibroblasts (HELFs) induced by silica.

METHODSHELFs transfected with pGenesil1.1 plasmid and pGenesil1.1 with PTEN shRNA (PT) plasmid were successfully established. 100 µg/ml silica and different concentrations of Cp (10, 20, 30 µg/ml) were used in this experiment and Cp were treated cells after exposed to silica for 1h. Three different cell lines (including HELFs, PT and cells were transfected with p85 dominant negative mutant plasmid (DN-p85)) were divided into control groups, silica groups and silica+different concentrations of Cp groups. MTT assay was used to detect the effects of Cp on silica-induced cell proliferation after inhibiting PTEN and p85. When suppressing the expression of PTEN and p85, western blot assay was performed to detect the levels of p85, p110, AKT308, AKT473 and ERK, JNK and their phosphorylated levels.

RESULTSAfter inhibition of PTEN, the high levels of p85 induced by 100 µg/ml silica with 30 µg/ml Cp were markedly decreased (P<0.05). When suppressing p85, the increased cell proliferation was not observed. And the high levels of AKT308, AKT473, ERK and phosphorylated JNK and ERK stimulated by 100 µg/ml silica with 30 µg/ml Cp were decrease (P < 0.05).

CONCLUSIONCp could further strengthened silica-induced cell proliferation by PI3K/AKT/MAPK cell signaling pathway, of which the level of p85 was regulated by PTEN.

Cell Proliferation ; drug effects ; Cells, Cultured ; Ceruloplasmin ; pharmacology ; Class Ia Phosphatidylinositol 3-Kinase ; metabolism ; Fibroblasts ; drug effects ; metabolism ; Humans ; PTEN Phosphohydrolase ; metabolism ; Signal Transduction ; drug effects ; Silicon Dioxide ; toxicity