Anti-Bacterial Agents ; administration & dosage ; therapeutic use ; Chest Tubes ; Erythromycin ; administration & dosage ; therapeutic use ; Humans ; Infant, Newborn ; Male ; Thoracic Cavity ; drug effects ; pathology ; Thoracic Diseases ; pathology ; therapy ; Treatment Outcome

Objective To investigate the the multi-directional differentiation potential between pluripotent of human gingival fibroblasts (HGFs) and human periodontal ligament cells (HPDLCs). Methods HPDLCs and HGFs were obtained from the primary culture. HPDLCs and HGFs at 3rd-4th passage were cultured in osteogenic, adipogenic or chondrogenic me-dium. Cells without differentiation were taken as control. Alizarin red, Alcian blue and oil red O staining were performed to detect osteogenic differentiation, chondrogenic and adipogenic differentiation in vitro, respectively. Reverse transcription polymerase chain reaction (RT-PCR) was applied to examine the expression of osteocalcin (OCN), runt-related transcription factor 2 (RUNX2) and collagen 1 (Col 1), peroxisome proliferator-activated receptor gamma 2 (PPARγ2) and collagen 10 (Col 10). Results HPDLCs and HGFs cultured in osteogenic medium showed massive calicium nodulus at day 28, but HP-DLCs formed more calicium nodulus than those of HGFs. The expressions of OCN, RUNX2 and Col 1 were significantly high-er in HPDLCs than those in HGFs (P<0.05). In chondrogenic medium both cells were found blue deposit at day 14, and the expression of Col 10 was significantly higher in HGFs than that of HPDLCs (P<0.01). Furthermore, in adipogenic medium HGFs showed more lipid-filled droplets stained with oil red O than HPDLCs at day 21. The expression of PPARγ2 was sig-nificantly higher in HGFs than that of HPDLCs (P<0.01). Conclusion HPDLCs has the better potency of osteogenic differ-etiation than HGFs, however, HGFs has the better potency of adipogenic and chondrogenic differentiation.

Objective To study Twist,E-CD expression in colorectal cancer tissues and its relationship with colorectal cancer invasion,metastasis and prognosis.Methods Immunohistochemical staining (EnVision) was used to detect E-CD,Twist expression of normal colon mucosa in 30 cases,colorectal adenoma in 30 cases and colorectal cancer tissues in 142 cases.Chi-square、Fisher's and Spearman test were used to analyze E-CD and Twist protein expression,Kaplan-Meier survival analysis and multivariate COX regression were used to analyze prognosis of patients.Results E-CD in the normal mucosa were positively expressed in 90％ cases,which was significantly higher than that in colorectal adenomas (63％) (P =0.046) and colorectal cancer tissues (42％) (P =0.000).E-CD expression was related to tumor differentiation (P =0.048),invasion depth (P =0.000),vein (P =0.000) and lymph vessel invasions (P =0.030),lymph node metastasis (P =0.001) and Dukes' stage (P =0.016),but not related to patient's age(P =0.174),gender(P =0.159),tumor size (P =0.628) and tumor histological type (P =0.153).1,3,5 year survival rate in patients with positive E-CD expression was significantly higher than that in patients with negative expression (P =0.000).Positive expression rate of Twist in colorectal cancer tissues (68％) was significantly higher than that in normal mucosa (20％,P =0.000) and colorectal adenomas (30％,P =0.000).Twist expression was related to tumor histological type (P =0.000),differentiation(P =0.000),invasion depth(P =0.000),vein(P =0.000) and lymph vessel invasions(P =0.000),lymph node metastasis(P =0.010) and Dukes' stage(P =0.000).1,3,5 year's survival rate of Twist-negative expression patients was significantly higher than that in patients with positive expression (P =0.000).E-CD and Twist in colorectal cancer tissues were negatively correlated (r =-0.530,P =0.000).COX multivariate analysis shows that vein invasion (P =0.045),lymph node metastasis (P =0.040),Dukes' stage (P =0.000),E-CD (P =0.003) and Twist (P =0.031) were independent prognostic indicators.Conclusions E-CD and Twist expression in colorectal cancer are related to tumor invasion,metastasis and prognosis.Low E-CD expression and high Twist expression are related to poor prognosis of colorectal cancer patients.

0.05).Conclusion Indexes of oxygen function may become criteria of early diagnosing NRDS,observing effect of treatment and guidance of ventilation weaning.

Objective To investigate the association between aortic calcification and risk of vertebral fracture in Chinese postmenopausal women.Methods This study recruited 561 postmenopausal women aged 60 or older who were prospectively followed for 3 years.Based on the ACS,the patients were divided into aortic calcification group (n =236) and non-aortic calcification group (n =325).Extent of aortic calcification and incidence of vertebral fracture were quantified on the baseline lateral radiographs of lumbar spine.Dual energy x-ray absorptiometry was utilized to evaluate the bone mineral density (BMD).Cox proportional hazards models were used to assess the associations between aortic calcification and risk of vertebral fracture.Results In aortic calcification group incidence of vertebral fracture was significantly higher than that in non-aortic calcification group (P ＜ 0.01).Moreover vertebral fracture presented an increased incidence while the ACS was higher.After the adjustment of age,body mass index,BMD,current smoking,current drinking,hypertension,diabetes,total cholesterol,myocardial infarction,stroke and 25-hydroxy vitamin D,aortic calcification with ACS ＞ 6(HR =3.03,95％CI 1.42-6.24),BMD (HR =2.82,95％ CI 1.75-5.68),age (HR =1.96,95％ CI 1.38-4.52),history of two or more falls (HR =1.45,95％ CI 1.24-2.79) and adiponectin (HR =1.07,95％ CI 1.22-2.31) were associated with increased risk of vertebral fracture.Conclusion Severe aortic calcification is closely associated with vertebral fracture for postmenopausal women.

AIM: To compare the ability of spectral-domain optical coherence tomography(SD-OCT)and slit lamp biomicroscopy to detect anterior segment findings in patients with closed globe injury.

METHODS: This is an observational, cross-sectional study. Sixteen patients with a closed globe injury were consecutively recruited from January 2010 to July 2015 in Huizhou Municipal Central Hospital. All patients underwent complete ophthalmic examination, including assessment of visual acuity, measurement of intraocular pressure using a noncontact tonometry, and slit lamp biomicroscopy. SD-OCT was used to examine the anterior segments of all injured eyes. Two patients had bilateral ocular injuries and received bilateral SD-OCT examinations. The OCT findings of the cornea, iris, anterior chamber and lens were recorded and compared with findings seen using slit lamp biomicroscopy.

RESULTS: All 18 eyes were examined by SD-OCT had hyphema occupying at least one-third of the anterior chamber volume. Sixteen eyes had corneal edema and corneal abrasion detected on both slit lamp biomicroscopy and OCT examination. OCT examination was also able to detect Descemet's membrane detachment(n=7), angle recession(n=6), lens subluxation(n=3)and iridodialysis(n=3).

CONCLUSION: SD-OCT was able to identify features of closed globe injury that were otherwise not visible on slit lamp biomicroscopy. SD-OCT may have advantages over clinical examination in cases of closed globe injury.

In this study, we investigated the pharmacokinetics parameters of SPIO-shRNA dual functional molecular probe and observed the main organ distribution by MRI in vivo. Eighteen New Zealand white rabbits were randomly divided into three groups and injected intravenously with different doses of SPIO-shRNA molecular probe, respectively. The blood samples were collected to analyze the pharmacokinetic parameters by measuring the iron content at 30 minutes before and after the injection. Twenty-four Kun Ming (KM) mice were randomly divided into 4 groups: the control group was injected intravenously with physiological saline 200 µL per mouse via the tail vein, the other 3 groups were injected intravenously with different doses of SPIO-shRNA molecular probe. MRI observation was performed in 24 hours, and the liver, spleen, kidney, brain and muscle were collected for iron quantification with Prussian blue staining to determine distribution of the SPIO-shRNA molecular probe in the main organ in vivo. Our results suggest that the molecular probe blood half-life is more than 3 hours. The data of MRI suggest the probe was distributed in liver and spleen, and the MRI signal was reduced with the increase in probe's doses (P < 0.05). The results of Prussian blue staining confirmed the results of MRI. Most of the probe could escape the phagocytosis of mononuclear phagocyte system. Our data provide the pharmacokinetic and distribution of SPIO-shRNA molecular probe in organs. Meanwhile, it suggests the choice of the time and dose of probe for MR imaging of tumor in vivo.
Animals ; Half-Life ; Magnetic Resonance Imaging ; Magnetite Nanoparticles ; Mice ; Molecular Probes ; pharmacokinetics ; RNA, Small Interfering ; chemistry ; Rabbits

BACKGROUND: It is easy to established human solid tumor nude mouse model, but for leukemia which is difficult. We inhibited immune system further by radioactive ray or CTX, to decrease cost and increase the stability.OBJECTIVE: To establish a human acute myeloblastic leukemia M2 Kasumi-1 models containing AML/ETO positive genes in BALB/c nude mouse. METHODS: Nude mice were randomly divided into three groups: CTX group was injected CTX 2 mg/day in abdominal cavity for two days, and injected 8×10~5/mouse Kasumi-1 cells in caudal vein next day; irradiation group was exposed to total body irradiation, and injected 8×10~5/mouse Kasumi-1 cells in caudal vein that day; untreated group was inoculated with 8×10~5/mouse Kasumi-1 cells by caudal vein injection. Three additional mice were considered as the normal control group. The blood smearing and bone morrow slides were detected, immunity type of BMC was detected using flow cytometry, loading of leukemic cellular tumor was detected using RT-PCR, and positive ratio of AML/ETO fusion gene was detected using FISH method. RESULTS AND CONCLUSION: After inoculated into untreated nude mice by caudal vein injection for 14 days, the ratio of leukemia cell in blood smearing was 3.5%, and over 40% in bone marrow slides, which was equal to the results of FISH and FCM. The increasing of tumor loading was time-dependent. For irradiation group and CTX treated group, the tumor loading was higher that untreated group, and the cells also survived more than 60 days. AML/ETO band was observed by RT-PCR in all experimental groups, for normal mice it was negative. The results indicated that the systemic disseminated leukemia model was established successfully by caudal vein injection 8×10~5/mouse Kasumi-1 cells in the three experimental groups.

Objective: To understand sleep behavior among primary and middle school students and its impact on overweight and obesity changes, to provide evidence for developing obesity prevention and controlling strategies in children and adolescents. Methods: Primary and middle school students from three cities in Zhejiang Province who participated in questionnaire surveys and physical measurements in both 2017 and 2019 were selected. A follow up dataset of 605 students was developed and the relationship between sleep duration and body mass index was analyzed. Results: From 2017 to 2019, BMI Z scores for male and female participants increased by 0.24 and 0.13, respectively. BMI Z scores increased by 0.29 in students of 9-12 years old and increased by 0.11 and 0.25 in urban and rural students, respectively ( P <0.05). The prevalence of insufficient sleep duration increased from 37.0 % to 41.8% simultaneously ( χ 2=3.68, P =0.06). After adjusting for confounding factors, the BMI Z score of students with insufficient sleep was 0.20 higher than those with sufficient sleep duration ( P <0.01). Compared with participants who had sufficient sleep duration from 2017 to 2019, participants whose sleep duration changed from sufficient to insufficient, and those who always had insufficient sleep duration increased by 0.23, respectively ( P <0.05). Conclusion Insufficient sleep duration is a risk factor for obesity. Shortened sleep duration is related to weight gain, and maintaining sufficient sleep duration may reduce the risk of obesity in children and adolescents.

OBJECTIVETo test the effect of recombinant interleukin-4 (IL-4) and recombinant osteoprotegerin (OPG) in suppressing bone resorption induced by polyethylene wear particles..

METHODSA cranial bone allograft was introduced into the air pouches induced on the back of BALB/c mice, followed by injection of 1 ml suspension of polyethylene particles into the pouches. The mouse models were then divided into 3 groups to receive injections of saline (control), IL-4 alone, or IL-4 and OPG into the pouches. The tissues were harvested 21 days after bone implantation for molecular and histological analyses.

RESULTSPolyethylene wear particles-stimulated inflammatory responses (increased cellular infiltration and IL-1 and TNF production) were markedly reduced by IL-4 treatment either alone or combined with OPG (P<0.05). Polyethylene particles significantly increased tartrate-resistant acid phosphatase (TRAP) staining and bone absorption of the implanted bone graft, and IL-4 treatment, either alone or combined with OPG, obviously reduced the osteolysis induced by polyethylene particles (P<0.05).

CONCLUSIONIL-4 offers protection against polyethylene wear debris-induced inflammation and bone resorption in this mouse model. IL-4 combined with OPG can be a feasible and effective therapeutic approach to the treatment and prevention of polyethylene wear debris-associated osteolysis and aseptic loosening of the prosthetic components.

Animals ; Bone Resorption ; chemically induced ; prevention & control ; Disease Models, Animal ; Female ; Interleukin-4 ; pharmacology ; Mice ; Mice, Inbred BALB C ; Orthopedic Fixation Devices ; adverse effects ; Osteolysis ; chemically induced ; prevention & control ; Osteoprotegerin ; pharmacology ; Polyethylene ; antagonists & inhibitors ; Recombinant Proteins ; pharmacology