Objective:To investigate the effect of the leaching liquids of the pure titanium porcelain crowns with barium titanate coating on the proliferation of L929 cells,and to evaluate its cytotoxicity level.Methods:The L929 ceils were cultured in vitro with leaching liquids of titanium porcelain specimens with barium titanate coating (group A),and titanium porcelain specimens(group B) for 1,3 and 5 days respectively.RPMI1640 containing 10％ fetal bovine serum and 1％ phenol was served as the negative(group C) and positive control group(group D),respectively.MTT method was used to test the effects of barium titanate coating on the proliferation of mouse fibroblast L929 cells,the cytotoxicity of the 4 groups was graded.Results:L929 cells of the group showed normal morphology and vigorous growth except group D.During the whole experiment,the absorbance values of group A was greater than that of group C(P ＜0.05).The cytotoxic gradation of group A grade 0.Conclusion:Titanium porcelain specimens with barium titanate coating has a good cytocompatibility.

Objective To observe CT findings of progressive muscular dystrophy(PMD)and to evaluate the diagnostic value of CT.Methods 100 healthy person were selected to measure the muscular density with CT including musculi of neck,back,waist,buttocks and legs,the density of musculi of back,waist,buttocks,and legs in 15 cases with PMD evaluated by comparative study.Results The arerage attenuation value of muscle in 100 healthy adults was 55 HU,while the musculi in the patients with PMD appeared atrophy,fatty degeneration and observable low CT attenuation value.Conclusion CT has important value in diagnosing PMD and help to guide the accurate localizations for biopsies.

As the specific endangered medicinal plant in Xinjiang, resources and distribution of Ferula sinkiangen-sis are important for biodiversity conservation and sustainable development of Chinese medicine resources. The spa-tial distribution and resources of F. sinkiangensis were researched based on low altitude remote sensing and sample investigation. The results showed that the optimum working time for F. sinkiangensis monitoring by low altitude remote sensing was the nearby 5 hills, which covered about 0.88 km2. It was suggested that the fence area should be expanded for protection. According to the results of low altitude remote sensing, the amount of F. sinkiangensis in yellow (diameter exceeding 0.3 m) was about 3 191. However, the sample investigation on amount of F. sinkiangensis in yellow (diameter exceeding 0.3 m) was about 2 752. The error between them was 14%. The monitoring time and range for F. sinkiangensis by low altitude remote sensing were also ensured. It was concluded that low altitude re-mote sensing had the advantage of quickly receiving distribution situation of F. sinkiangensis, which can effectively evaluate dynamic changes of F. sinkiangensis in Xinjiang.

Objective To explore the distribution of prenatal indications , clinical features and pregnant outcomes of chromosomal unbalanced reciprocal translocations atthe second trimester. Methods The data on 35 fetuses with unbalanced reciprocal translocations between May 2011 and March 2016 were retrospectively analyzed and reviewed. Results Of 35 fetuses with unbalanced translocations , 29 (82.86%) showed ultrasound abnormalities,and 6 (17.14%) had no significant clinical features. 8 were de novo, and the other 27 were parental inherited. All the 35 women had to terminate the pregnancy. Conclusions Ultrasound abnormalities are associated with chromosomal unbalanced reciprocal translocations at the second trimester , and most unbalanced translocations fetuses origin from parental carrier of balanced translocations.

BACKGROUND:The low oxygen environment after femoral fracture and cerebral trauma wil induce series of related cytokines expression, including hypoxia-inducible factor 1αand core binding factorα1, which play key roles in regulating bone healing. However, whether the accelerated bone healing is correlated with the expression of hypoxia-inducible factor 1αand core binding factorα1 is stil unknown.
OBJECTIVE:To construct rat models of brain injury, to compare the expression level of hypoxia-inducible factor 1αand core binding factorα1 in femoral fracture combined with cerebral trauma rats and simple femoral fracture rats, and to assess the influence of cerebral trauma on bone healing.
METHODS:Rats were randomly divided into blank group, simple femoral fracture group and femoral fracture combined with cerebral trauma group. At 1, 2, 3 and 5 weeks after modeling, rats were executed. Bone healing was evaluated using femoral fracture end X-ray score and hematoxylin and eosin staining at cal us tissues. Besides, the expression levels of hypoxia-inducible factor 1αand core binding factorα1 of three groups were determined with immunohistochemistry.
RESULTS AND CONCLUSION:Bone healing in the femoral fracture combined with cerebral trauma group was better than that of simple femoral fracture group. There was significant difference in the expression level of hypoxia-inducible factor 1αand core binding factorα1 between the simple femoral fracture group and femoral fracture combined with cerebral trauma group (P<0.05). At the same time, the level of simple femoral fracture group and femoral fracture combined with cerebral trauma group was significantly higher than that of blank group, and that in femoral fracture combined with cerebral trauma group was significantly higher than that of simple femoral fracture group (P<0.05). Results verified that the expression levels of hypoxia-inducible factor 1αand core binding factorα1 of rats with femoral fracture combined with cerebral trauma were significantly high, which may be the major reason why the bone healing was accelerated after fracture combined with brain injury.

Acute appendicitis represents one of the most common causes of acute abdomen that may warrant emergency surgery. Necrotizing fasciitis complicated by acute appendicitis is considered a rare complication with life-threatening implications. A 65-year-old man presented with abdominal pain, where a scan, revealed a perforated appendicitis complicated by an anterior abdominal wall collection. He underwent percutaneous drainage, but subsequently developed extensive necrotizing fasciitis requiring extensive debridement and reconstruction. The rapid progression of necrotizing fasciitis calls for early recognition and prompt intervention. The key management principles employed were broad spectrum antibiotics and aggressive surgical debridement. This case demonstrated the use of vacuum-assisted closure dressing and multidisciplinary care in wound healing and coverage. To ensure early diagnosis and intervention for acute appendicitis complicated by necrotizing fasciitis, a high degree of clinical suspicion and awareness of this complication is required.

Objective:To investigate the effects of Bifidobacterium animalis subsp. lactis BB-12 on hippocampal neuroinflammation and cognitive function of mice after whole brain radiotherapy. Methods:A total of sixty male C57BL/6J mice aged 7-8 weeks were randomly divided into 5 groups with 12 mice in each group: control group (Con group), probiotic group (BB-12 group), irradiation group (IR group), irradiation and Memantine group (IR+ Memantine group), irradiation and probiotic group (IR+ BB-12 group). The model of radiation-induced brain injury of mice was established by 10 Gy whole brain radiotherapy with a medical linear accelerator. Y-maze test was used to evaluate the cognitive function. The activation of microglia and astrocytes was observed by immunofluorescence staining. The expressions of inflammatory cytokines interleukin-1β (IL-1β), IL-6 and tumor necrosis factor-α (TNF-α) were detected by quantitative real-time reverse transcription polymerase chain reaction (QRT-PCR) and Western blot.Results:Y-maze test showed that, compared with Con group, the percentage of the times of reaching the novel arm in the total times of the three arms decreased significantly in the IR group ( t=5.04, P<0.05). BB-12 mitigated radiation-induced cognitive dysfunction ( t=4.72, P<0.05). Compared with Con group, the number ( t=3.05, 7.18, P<0.05) and circularity index ( t=6.23, 2.52, P<0.05) of Iba1 and GFAP positive cells were increased, the microglia and astrocytes were activated in the hippocampus of IR group, but these alterations were eliminated by BB-12. After whole brain IR, the mRNA and protein expression levels of inflammatory cytokines IL-1β, IL-6 and TNF-α in the hippocampus of mice were significantly increased compared with Con group ( tmRNA =4.10, 3.04, 4.18, P<0.05; tprotein=11.49, 7.04, 8.42, P<0.05), which were also significantly reduced by BB-12 compared with IR group ( tmRNA=4.20, 3.40, 2.84, P<0.05; tprotein=6.36, 4.03, 3.75, P<0.05). Conclusions:Bifidobacterium animalis BB-12 can suppress neuroinflammation mediated by microglia and astrocytes in the hippocampus of mice after radiotherapy and alleviates IR-induced cognitive dysfunction. Therefore, BB-12 has potential application in alleviating radiation induced brain injury.

OBJECTIVE: To analyze the indication, karyotyping result, ultrasound finding, pregnancy decision and follow-up of fetuses with sex chromosome aneuploidies (SCA) detected by non-invasive prenatal testing (NIPT) during early and midterm pregnancies. METHODS: The results of 225 singleton pregnancies with fetal SCA detected by NIPT were reviewed and analyzed. RESULTS: The 225 cases included 45,X (n=37), 47,XXY (n=74), 47,XXX (n=50), 47,XYY (n=56) and mosaicisms (n=8), among which 121 (53.8%) have opted to terminate the pregnancy, including 45,X (n=31), 47,XXY (n=61), 47,XXX (n=14), 47,XYY (n=12) and 3 mosaicisms. The remainder 104 (46.2%) have elected to continue with the pregnancy, among which three have opted to terminate due to abnormalities detected by ultrasonography, and two had spontaneous abortions. CONCLUSION NIPT as a first-tier screening method can effectively detect fetal trisomies 21, 13 and 18 as well as SCA. The types of fetal SCA and presence of ultrasound abnormalities are critical factors for the termination of pregnancy.
Aneuploidy ; Down Syndrome ; Female ; Fetus ; Humans ; Pregnancy ; Prenatal Diagnosis ; Sex Chromosome Aberrations ; Trisomy

Objective To evaluate the effect of different kind of intravenous immunoglobulin (IVIG) therapy in treating Kawasaki disease (KD) and preventing cardiac consequences (coronary artery lesion, CAL). Methods A questionnaire form and guideline for KD diagnosis were sent to 50 hospitals providing pediatric medical care in Shanghai. The data from a total of 1 682 KD patients were collected. It included 1 064 males and 618 females from 1998 through 2008 in Shanghai. The average age of the KD patients was (2.57±2.33) years old (0.1-18.8 years).The patients had been divided into 6 groups for different IVIG therapy, which included 1 g/kg once, 2 g/kg once, 0.4-0.5 g/kg five times, 1 g/kg twice, 2 g/kg twice and others. SAS 6.12 software was used for statistical analysis. Results In all KD patients, the patients treated with IV1G in 5th-10th day of illness has the least cardiac complication and CAL incidence and the group with IVIG therapy of 1 g/kg twice also has the least cardiac complication and CAL incidence. Conclusions The best doses of IVIG in treating KD is 1 g/kg twice and the IVIG therapy should be used in 5th-10th day of KD illness.

ObjectiveTo investigate the prevenance rate and related factors of anxiety among the public before and after outbreak of COVID-19， and to provide scientific guidance for public health emergency response in psychological intervention field. MethodsBy using the convenient sampling method， residents in Chinese mainland participated in predesigned questionnaire survey from February 7^th to February 14^th， 2020， meantime， all the selected individuals were assessed using Self-rating Anxiety Scale （SAS）. The anxiety status was also retrospectively evaluated before January 20^th， prior to the outbreak. Thereafter， a before-and-after comparison was conducted on the anxiety status， and the related influencing factors were discussed. ResultsA total of 1 222 valid questionnaires were collected， with a valid rate of 93.8%. After the outbreak， the number of people with anxiety symptoms increased from 90 （7.4%） to 172 （14.1%）， with statistical difference （P<0.01）. The SAS score increased from （40.65±10.43） to （36.32±8.46）， with statistical difference （P<0.01）. For overall sample， the independent risk factors of anxiety aggravation included serious disruptions of daily life （P<0.01）， older age （P<0.01）， female （P<0.01）， poor education background （P=0.005）， occupied in medical staff （P=0.031） and lack of medical education （P=0.039）. For medical staff， the independent risk factors of anxiety aggravation included sense of being-alienated （P<0.01）， older age （P<0.01）， female （P=0.002） and serious disruptions of daily life （P=0.044）. ConclusionThe prevalence rate of anxiety is increased after the outbreak of COVID-19， especially among the general public with serious disruptions of daily life， older age， females， poor education background， and the lack of medical education， and among medical staff with sense of being-alienated， older age， females， and serious disruptions of daily life.