Objective To analyze the relationships between the drinking water fluoride and bone mineral density (BMD), and serum osteocalcin (BGP) and to explore the BMD and serum BGP as significant early screening biomarkers for fluorosis especially for early bone damage in endemic fluorosis areas. Methods Wamiao (severe endemic fluorosis area, as fluoride exposed group) and Xinhuai (non endemic fluorosis area, as control group) Village were selected in 2006. One hundred and fouty-six objects were chosen from 2 villages (103 in Wamiao, 43 in Xinhuai). The sex, age, body height, body weight, drinking water fluoride in each object's household well, BMD, and serum BGP were investigated, and the dose-response relationships were analyzed between the drinking water fluoride and BMD, and serum BGP. CurveExpert 1.3 Software was used to fit the dose-response relationships between the rate of abnormal BMD, the rate of abnormal serum BGP, and the drinking water fluoride. Results The levels of drinking water fluoride in males' and females' families in fluoride exposed group were [(2.38±0.68), (2.62±0.91 )mg/L] significant higher than that in control group [(0.35±0.08), (0.36±0.07)mg/L], the difference being statistically significant(t values were 14.27 and 11.08,and P<0.01, respectively). BMD in males in fluoride exposed group [(0.78±0.07)g/cm2] was significant lower than that in control group[(0.83±0.08)g/cm2], the difference being statistically significant (t=2.37,P<0.05). Serum BGP in males and females in fluoride exposed group [(4.17±0.67), (4.11±0.57) μg/L] were significant higher than that in control group [(1.48±0.40), (1.44±0.39)μg/L], the difference being statistically significant (t values were 17.64 and 19.40, and P<0.01, respectively]. BMD in the group with drinking water fluoride≥2.92 mg/L[(0.66±0.15 )g/cm2] was significant lower than that in the group with drinking water fluoride<0.42 mg/L [(0.76±0.12)g/cm2], the difference being statistically significant (P<0.01). The levels of serum BGP in the groups with the drinking water 0.42-,2.05-, ≥.92 mg/L[(3.83±1.07), (4.22±0.72), (3.99±0.63) μg/L] were significant higher than that in the group with the drinking water<0.42 mg/L [(1.44±0.37) μg/L], the difference being statistically significant (P<0.01). The equation for the dose-response relationship between the drinking water fluoride and the rate of abnormal BMD was y=(0.284-0.058x)-1.260, r=0.999 94; and y=100.05/(1+78.62e-4.5x), r=0.999 99 for the drinking water fluoride and the rate of abnormal serum BGP. Conclusions There were significant dose-response relationships between drinking water fluoride and BMD and serum BGP. It indicated that BMD and BGP might be considered as early screening biomarkers for endemic fluorosis, especially for the bone damage.

The purpose of this study is to prepare galactosyl modified lipid bilayer-coated mesoporous silica nanoparticles (GPEM) to enhance the antitumor efficacy against hepatocellular carcinoma cells. The irinotecan (CPT-11) loaded mesoporous silica nanoparticles (MSNs) was coated with the Gal-P123 modified functional lipid bilayer by thin-film dispersion method. Nanoparticles were characterized with particle size, zeta potential, morphology and drug release in vitro. Afterwards, the cell uptake, intracellular concentration of CPT-11, cell apoptosis rate and cytotoxicity were evaluated on human hepatocellular carcinoma cell line Huh-7. The results showed that MSNs were coated with intact lipid bilayers and the nanoparticles had clear core-shell structure. GPEM is stable with the mean particle size of (78.01 +/- 2.04) nm. The low leakage rate in normal physiological conditions in vitro is contributed to the protection of stable lipid bilayer, and the fast drug release in acid environment due to the destruction of the lipid bilayer. On the cell level, the vector could improve the intracellular CPT-11 concentration by 4 times because of the functional lipid bilayer. The high CPT-11 concentration led to the increasement of apoptosis rate by 48.6%, and the reduction of half maximal inhibitory concentration (IC50) values of CPT-11 by 2 times, indicating stronger cell cytotoxicity.
Antineoplastic Agents ; chemistry ; pharmacokinetics ; Apoptosis ; Camptothecin ; analogs & derivatives ; chemistry ; pharmacokinetics ; Carcinoma, Hepatocellular ; drug therapy ; pathology ; Drug Carriers ; chemistry ; Drug Delivery Systems ; methods ; Humans ; Lipid Bilayers ; chemistry ; Liver Neoplasms ; drug therapy ; pathology ; Nanoparticles ; chemistry ; Particle Size ; Silicon Dioxide ; chemistry

OBJECTIVETo compare the efficacy of nasal synchronized intermittent positive pressure ventilation (NSIPPV) and nasal continuous positive airway pressure ventilation (NCPAP) for the treatment of apnea in preterm infants.

METHODSEighty preterm infants with apnea from August 2010 to January 2011 were randomly administered with NSIPPV and NCPAP (n=40 each).The blood gas results before and 2 hrs after ventilation, time of using ventilator, therapeutic efficacy and complications were compared between the two groups.

RESULTSThere were no significant differences in the blood gas results between the two groups before ventilation. The blood gas results (pH, PO2, PCO2) in the NSIPPV group were better than those in the NCPAP group 2 hrs after ventilation. The time of using ventilator in the NSIPPV group was shorter than that in the NCPAP group (50±9 h vs 91±11 h; P<0.01). There were no significant differences in the total effective rate between the NSIPPV and the NCPAP groups (95% vs 85%; P>0.05). The proportion of ventilator weaning within 3 days in the NSIPPV group (23/40) was higher than that in the NCPAP group (14/40) (P<0.05). The incidence of complications in the NSIPPV group was not different from that in the NCPAP group (22% vs 25%).

CONCLUSIONSNSIPPV appears to be superior to NCPAP for the treatment of apnea in preterm infants.

Apnea ; therapy ; Blood Gas Analysis ; Continuous Positive Airway Pressure ; Humans ; Infant, Newborn ; Infant, Premature ; Intermittent Positive-Pressure Ventilation ; adverse effects ; methods

ObjectiveTo find incidence rate of no-suicide self injury (NSSI) of junior school students in Dalian city,and to provide some evidences for interventions for them.MethodsRandomly drawn out 1463 junior school students were served as study objects.All objects were evaluated with Ottawa Self-Injury Inventory (OSI) and self-made investigate questionnaire,75 no-suicide self-injury were screening out.ResultsThe incidence ratio of NSSI of junior school students was 5.4％,there were no significant different between the male and female students.The highest incidence ratio was found at 13 years old.The average age for first-time self-harm was (12.24±1.344) years old.There were no significant different between the male and the female students( t=- 1.415,P =0.163 ) ; Cutting Skin was the most common way of NSSI ( 12.0％ ) ; Ideation of 80％ of the NSSI was from their Own Idea.2.7％ of the NSSI can Feel Relief through NSSI behavior.93％ of NSSI was to regulate their mood.100％ students of NSSI against NSSI behavior byReading Books or Listening Music,in which 60％ of NSSI believe the method was helpful to relax their mind.78.5％ of the NSSI resisted NSSI behavior by Watching TV or Playing Games,but they did not get enough effects.60％ NSSI considered themselves without the need to treat.41.3％ of NSSI had never been to treat.2.5％ of NSSI went to hospital for the wound.ConclusionNSSI is often be found in junior school students,and highest ratio is at 13 years old.The most common method of NSSI is Cutting Skin.More NSSI aim is to release their emotion,and self-injury behavior accordance with their inner thoughts.NSSI behavior often is secret,and reading and listening to music is cut off from the relative effective way to conduct.NSSI are seldom to initiative doctor,and education organ,parents and society in a three-dimensional one of the system is necessary.

OBJECTIVETo explore the action mechanism of the immune active components of sappon wood (SWE) for antagonizing reject reaction by observing the influence of its ethyl acetate extract on mRNA expression of myocardial GrB in rat model of allogenic ectopic cardiac transplantation.

METHODSAnimal model of abdominal cardiac ectopic transplantation was established taking Wistar rat as the donor and SD rat as the receptor. The successfully modeled rats were randomly divided into the model group, the SWE group and the CsA group. GrB mRNA expression was detected by RT-PCR method and myocardial pathomorphologic picture was observed in routine.

RESULTSThe pathologic changes in the SWE group (23 scores) and the CsA group (14 scores) were milder than in the model group (31 scores), the former two could markedly alleviate the myocardial pathologic injury (P<0.05, P<0.01). The GrB mRNA expression in the model group was 1.3000 +/- 0.1207, the SWE group 0. 7070 +/- 0.1215, and the CsA group 0.6700 +/- 0.0997, respectively; compared with the model group, the latter two could obviously down-regulate the expression of GrB mRNA (P<0.01) and no significant difference was found between the latter two groups (P>0.05).

CONCLUSIONSWE could alleviate the pathologic change, down-regulate the mRNA expression of myocardial GrB in allogenic ectopic transplanted myocardium of rats, it is possibly one of the factors for its antagonizing effect against reject reaction.

Acetates ; chemistry ; Animals ; Caesalpinia ; chemistry ; Gene Expression Regulation, Enzymologic ; drug effects ; Graft Rejection ; drug therapy ; Granzymes ; genetics ; Heart ; drug effects ; Heart Transplantation ; immunology ; Male ; Models, Animal ; Myocardium ; metabolism ; pathology ; Plant Extracts ; pharmacology ; therapeutic use ; RNA, Messenger ; genetics ; metabolism ; Rats ; Transplantation, Homologous

Objective To investigate the expression of let-7c-5p in esophageal squamous carcinoma(ESCC),and also to analyse the effect of let-7c-5p on the proliferation and migration of ESCC cells KYSE150.Methods Forty-two cases of esophageal squamous carcinoma(ESCC)were collected from our hospital,and the paracancerous tissues were used as the control group.The expression of let-7c-5p in ESCC tissues and their adjacent paracancerous tissues was determined by qRT-PCR(real-time fluorescence quantitative polymerase chain reaction);KYSE150 cells were transfected with liposomal Lipofectamine 2000,and the expression of let-7c-5p in transfected KYSE150 cells was determined by qRT-PCR;and the proliferation of the transfected cells was measured by CCK-8 technique;the migration activity of the cells was measured by wound healing assay and Transwell migration assay.Results The expression of let-7c-5p mRNA in ESCC tissues was significantly lower than that in normal tissues next to their cancer(P=0.000);after transfection of KYSE150 cells,in terms of expression,let-7c-5p mimics were significantly higher than that in the NC group(P＜005);the proliferative function of KYSE150 in the transfected group showed a drastic decrease,and its migratory activity was substantially suppressed.Conclusion let-7c-5p is lowly expressed in esophageal squamous carcinoma,and up-regulation of its expression can significantly inhibit the proliferation and migration of esophageal squamous carcinoma KYSE150 cells,providing a new potential target for the diagnosis and treatment of esophageal squamous carcinoma patients.

OBJECTIVETo establish an animal model of lung injury in SD rats using intratracheal instillation of unknown polymer and to provide the base for exploring the molecular mechanism of lung tissue injury induced by occupational exposure.

METHODSOne hundred forty SD rats were randomly divided into seven groups, including the control group 1 which was exposed to normal solution, the control group 2 which was not exposed to any one and five treatment groups which were exposed to 1 ml unknown polymer (0.5 ml for each lung) at the doses of 40, 30, 20, 10 and 5 mg/ml, respectively by intratracheal instillation. The rats were sacrificed on the 1st, 3rd, 7th, 10th, 14th, 21th and 28th day after exposure, then the lung tissues were examined pathologically and the blood bio-chemical analysis was conducted.

RESULTSThe results of blood biochemical analysis indicated that ALT and AST levels in rats exposed to 30 and 40 mg/ml unknown polymer were significantly higher than those in control groups. Intratracheal instillation of unknown polymer can causes PLF in experimental animals on the 14th days after exposure. The results of pathological examination exhibited that the lung tissue injury in rats exposed to unknown polymer for 14 days or more was found and the dose-effect relationship was observed.

CONCLUSIONAn animal model of lung injury in SD rats induced by unknown polymer with intratracheal instillation was established successfully. The results of pathological examination showed that the types of rat lung injury were similar to the clinical lung injury after exposure to unknown polymer, which provided a base for studying the mechanism of lung injury caused by occupational exposure to unknown polymer.

Animals ; Disease Models, Animal ; Female ; Lung ; drug effects ; pathology ; Lung Injury ; chemically induced ; Male ; Polymers ; toxicity ; Rats ; Rats, Sprague-Dawley

Objective To analyze the clinical features and the surgical treatment outcomes of patients with tuberculous otitis media and mastoiditis. Methods The medical records of 16 patients (18 ears) with tuberculous otitis media and mastoiditis, who received surgery in Beijing Tongren hospital,were reviewed. Results The common symptoms were otorrhea and hearing loss, and 3 patients demonstrated severe sensorineural hearing loss. Three patients demonstrated a peripheral-type facial palsy.Temporal bone high resolution CT scans demonstrated the entire tympanum and mastoid air cells were occupied by soft tissue. Eleven patients demonstrated bone destruction and sequestra was found in 7 temporal bones. Contemporary pulmonary tuberculosis were diagnosed in 7 of the 16 patients. Surgical removal of disease lesions in combination with anti-tuberculosis treatment were given to 15 patients. Other than 2 cases of tuberculous otitis media and mastoiditis diagnosed by pre-operational biopsy through the perforated tympanic membrane, the remaining 14 cases were diagnosed intra-oporatively or post-operatively. No relapse of tuberculosis in the middle ear and mastoid were found after follow-up for more than 1 year, except for the one case that was lost to follow-up. The 3 cases of facial nerve palsy almost recovered to normal.Conclusions Clinicians should suspect tuberculous otitis media and mastoiditis if clinical findings include refractory otorrhea, total occupation of the tympanic cavity and mastoid ari cells by soft tissue, and erosion of the bone or sequestra as shown by CT. A history of tuberculosis should be asked carefully in order to differentiate tuberculous otitis media and mastoiditis. The patients who received surgery and anti-tuberculosis chemotherapy achieved more rapid healing of the ear.

OBJECTIVETo study rDNA ITS sequence differences between F type and that of H type of Dendrobium officinale in main habitat of China.

METHODThe population differences of the rDNA ITS region (including ITS1, ITS2, 5.8S) sequences of D. officinale were studied by the method of DNA sequences analysis.

RESULTThere were two different sites between the rDNA ITS sequence of F type and that of H type. One was in ITS1 region, and the other was in 5.8S region. It was proved that there was some relativity between the character of rDNA ITS region and the life type of the populations. The phenomenon of single nucleotide polymorphism (SNP) existed in 5.8S region of rDNA ITS region between F type and H type. The sequences of rDNA ITS region of D. officinale were reported for the first time, and the sequences of ITS region ranged 634 bp (ITS1 231 bp, ITS2 240 bp, 5.8S 163 bp).

CONCLUSIONThe analysis of rDNA ITS of D. officinale deeply reveal the population differences of D. officinale of F type and H type.

Base Sequence ; DNA, Plant ; genetics ; DNA, Ribosomal ; genetics ; Dendrobium ; classification ; genetics ; Molecular Sequence Data ; Plants, Medicinal ; genetics ; Polymorphism, Single Nucleotide ; Sequence Analysis, DNA ; Species Specificity

OBJECTIVETo summarize the epidemiological, clinical and serological features of syphilis.

METHODThe clinical data of 1125 patients with syphilis were retrospectively analyzed.

RESULTSNon-marital sexual intercourse is the main route of infection. The 129 cases of primary syphilis were featured by extragenital chancres and the 357 cases of secondary syphilis were featured by scaling macules on the palms and soles and condylomata lata. Early latent syphilis were detected in 178 cases, late latent syphilis in 174 cases, and latent syphilis of unknown duration in 285 cases. Concurrent infection with other sexually transmitted diseases were noted in 107 cases (9.51%). Most patients were treated with benzathine penicillin, and only 31 patients (2.75%) were allergic to this therapy. Except for the primary syphilis, the sensitivity of syphilis serological tests (including rapid plasma regain test, treponema pallidum particle agglutination, treponema pallidum hemagglutination assay, and fluorescent treponemal antibody-absorption) were higher than 97%.

CONCLUSIONSThe incidence of latent syphilis is high, while the incidence of late syphilis is low. Penicillin remains the treatment of choice for syphilis.

Adult ; Female ; Humans ; Male ; Middle Aged ; Retrospective Studies ; Syphilis ; diagnosis ; epidemiology ; therapy ; Young Adult