Objective To study CTLA4Ig gene expressed in dermal papilla cells and to provide evidence for immune tolerance after dermal papilla cells transplantation. Methods CTLA4Ig cDNA was transferred into dermal papilla cells by recombinant adenovirus vector, and the dermal papilla cells containing CTLA4Ig gene were transplanted into mice skin. The target gene expression was detected by histological and immunohistochemistry technique. Results CTLA4Ig protein was expressed in plasma 6 hours after gene transfection and increased gradually. When the transferred papilla cells were transplanted into mice skin the gene began to express in 24 hours and lasted for 2 weeks. No rejection was observed. Conclusion Dermal papilla cells containing CTLA4Ig gene can survive in vitro and in vivo and express CTLA4Ig for a long time.

Dermatology and venerology is a clinical discipline characterized by morphology.With the development of the internet and the application of internet in education,the features and advantages of internet teaching are gradually recognized including high flexibility,rich information and good student-teacher interaction.This article focused on the establishment and practice of internet teaching to improve teaching quality.

Objective To explore the imaging features on chest radiograph and CT in children with Influenza A H1N1 pneumonia. Methods The imaging data of chest radiograph and CT in six children with Influenza A H1N1 pneumonia confirmed by real-time RT-PCR assay was retrospectively analysis. All patients had chest radiograph at first examination and 4 of them re-examed. One children took CT. Results All cases showed thick lung markings with varied degrees of pulmonary infiltration and interstitial changes on chest radiograph. Among them, 3 cases showed bilateral pulmonary infiltration and 3 cases showed infiltration in left lung; enlarged hilar was observed in 3 cases. The imaging findings of the pneumonia changed quickly during the follow-up accompanied with the improvement of clinical symptoms. The only one chest CT examination showed bilateral infiltration, multiple ground-glass opacities,small subpleural nodulars, right pleural effusion and lymphadenopathy of lung hila and mediastinum. Conclusions Chest radiograph and CT revealed certain typical imaging features in the children with influenza A H1N1 pneumonia. However, the final diagnosis of influenza A H1N1 pneumonia still should be made based on epidemiology and laboratory examination.

nal abnormalities of pediatric heart diseases.

Objectives To evaluate the effects of hypertonic-hyperoncotic solution (HHS) on cardiac function and extravascular lung water in children after open-heart surgery for congenital cardiac disease. Methods 50 children with congenital cardiac disease were randomly assigned to 2 groups. The HHS group received HHS (7.5% sodium chloride with 6% hydroxyethyl-stareh 200 kDa). The ISS group received isotonic saline solution (ISS 0.9% sodium chloride). Cardiac index (CI), extravascular lung water index (ELWI), stroke volume index (SVI), mean arterial pressure (MAP), and systemic vascular resistance index (SVRI) were measured. Immediately after sur-gery, patients were loaded either with HHS or with ISS (4 ml/kg). Sodium concentration, osmolality, thrombocyte count(TC), fibrinogen, and arterial blood gases were detected before operation, immediately after loading, 15 minutes, 1,4, 12, and 24 hours after the end of vol-ume loading. Hemodynamic parameters were recorded at the same time. The total amount of dobutamine required was documented. Results In HHS group, MAP, SVI and CI increased, and SVRI decreased significantly after the administration of HHS, compared with ISS group and before administration(P<0.01 or 0.05). Both CVP and HR were unchanged in both groups. In HHS group, ELWI decreased signifi-cantly, compared with before volume administration. But ELWI increased directly and remained elevated for 60 minutes after the administra-tion of ISS. Sodium concentration increased immediately after infusion of HHS. The postoperative need for infused dobutamine in the patients in HHS group was decreased, compared with ISS group (P<0.05). All patients left the hospital in a clinically sufficient state. Condu-sions A single infusion of HHS after cardiac surgery is safe. After cardiopuimonary bypass surgery, the administration of HHS increased CI by elevating SVI in combination with a decreased SVRI. ELWI significantly decreased, which suggest that HHS effectively counteracts, the capillary leakage.

Objective To investigate the expression of CD14/CD16 by monocytes and the anti-inflammatory effects of hypertonic saline plus dextran (HSD) in adult blunt trauma patients in hemonhagic shock. Method A total of 30 adult patients were eligible for inclusion in the study if they sustained blunt trauma from March to October 2007 and had at least one recorded episode of hypotension (systolic blood pressure ≤ 90 mm Hg) with clear evidence of blood loss (external or internal including the thorax, abdomen or retroperitoneum). Patients were excluded if they refused to participate, were admitted ≥ 6 hours after injury, were pregnant, or had chronic disease. The enrolled patients were randomly divided in a double-blinded manner into an HSD group which was administered 7.5% Nad plus 6% dextran - 70, and a control group which was administered 0.9% NaCl. A single 250 ml dose of either HSD or NaO was immediately administered to the patients in each of the two groups while they were in the emergency room. The primary outcomes were to measure the changes in CD4/CD16 expression by monocytes and the levels of anti-inflammatory cytokines, including tumor necrosis factor-alpha (TNF-α), interleukin (IL)-lra and IL-10. Patient demographics, fluid requirements, organ dysfunction, infection and death were recorded. Results A total of 28 patients were enrolled with no significant differences in their clinical measurements. Hyperosmolarity was modest and transient. HSD altered the shock-induced monocyte redistribution pattern by reducing the drop in the "classic" CD14 ++ subset and remarkably affecting the expansion of the "pro-inflammatory" CD14+CD16+ subsets. In parallel, HSD significamly reduced pro-inflammatory TNF-α production while increasing anti-inflammatory IL-lra and IL-10 production. Conclusions This human trial demonstrates that HSD has anti-inflammatory and immunologic properties for trauma patients in hemorrhagic shock. HSD exerts profound immunomodulatory effects, promoting more balanced pro-/anti-inflammatory responses and reducing post-traumatic complications. Therefore, it could be useful in attenuating post-trauma multiorgan dysfunction (MOD).

Objective To identify the clinical risk factors of refractory Mycoplasma pneumoniae pneumonia (RMPP) and their values in early diagnosis. Methods The retrospective analysis of clinical data was conducted in 142 children with Myco-plasma pneumoniae pneumonia (MPP) admitted to Changhai Hospital of Second Military Medical University from Jan. 2012 to Jan. 2014. All children were divided into two groups, RMPP group (n=112) and MPP group (n=30). The comparison was made between two groups in clinical data. The factors were analyzed by the multifactor logistic regression. Results As compared to MPP, RMPP had longer fever duration, the higher ratios of large consolidation shadows, extrapulmonary complications and in-creased CRP level (P<0.05). The results of logistic regression indicated that the clinical risk factors included large consolidation shadows (OR=6.57, 95%CI:2.10-20.56), extrapulmonary complications (OR=11.66, 95%CI:2.42-56.08) and CRP (OR=14.87, 95%CI:2.67-82.79) (P<0.01). Conclusions Large consolidation shadows, extrapulmonary complications and CRP are clinical risk factors of RMPP. CRP elevation and lung imaging changes are valuable in early diagnosis of RMPP.

Objective To investigate the characteristics of spinal MR images in acute flaccid paralysis(AFP) associated with enterevirus 71 infected hand-foot-mouth disease.Methods The spinal MR images of eight infants with AFP and positive EV71 cultures were analyzed during an outbreak of hand-foot-mouth disease in China in 2008.Results Acute paralysis was observed in one lower limb in 4 of the 8 patients,in four limbs in 2 patients,in one upper limb and both lower limbs in 1 patient,2 of the 8 patients also had brain stem encephalitis.Lesions were identified in anterior horn regions of spinal cord with hyperintensity on T2-weighted images and hypointensity on T1-weighted images.Location of the lesions included C3 to C7(1 case),T10 extending to conus medullaris(5 cases)and a combination of the above (2 cases).Five of the 8 patients presented with unilateral paralysis.Two of the 5 cases showed unilateral hyperintense lesions in anterior horn regions and the remaining 3 cases showed bilateral hyperintense lesions in anterior horn regions with a unilateral predominance.One of the 3 patients with bilateral lesions showed slight enhancement of anterior horn with prominent enhancement of ventral roots after intravenous injections of contrast medium.Three of the 8 patients with bilateral paralysis showed bilateral hyperintensity in both anterior horn regions.Conclusion MR is the imaging medality of choice for the detection of radiculomyelitis of AFP associated with EV71 infection.

Objective To investigate the CT features of inflammatory myofibroblastic tumor in children. Methods Eighteen patients with inflammatory myofibroblastic tumor proven by surgery and pathology were examined with plain and contrast medium enhancement CT scan. Results Of 18 cases,16 had isolated lesions located at lung (n =4), mesentery (n =3), kidney (n =2) and trachea (n = 1 ),left main bronchus ( n = 1 ), right thoracic cavity ( n = 1 ), peritoneum cavity ( n = 1 ), pancreas ( n = 1 ),left thigh ( n = 1 ), prostate ( n = 1 ), superclvicle soft t tissue ( n = 1 ) , bladder ( n = 1 ). The other 2 cases were with multiple lesions on omentum and mesentery, and in intraperitoneal and side of split of right hepatic lobe, respectively. The CT findings of 18 cases included 16 solid mass with calcifications in 3 of them, and 2 solid-cystic mass. After contrast enhancement, moderate or marked homogeneous or heterogeneous enhancement were shown in all the solid parts of tumor on dynamic CT. Mass can compress surround great vessel and tube-like structure. On pathological examination, the tumor was mainly composed of spindleshaped fibrous cells and inflammatory cells, and the immunohistochemically staining for SMA was observed positively. Conclusion CT can provide specific information for diagnosis of inflammatory myofibroblastic tumor, yet definite diagnosis relies on pathology.

Objective　To investigate the actions of extra cellular medium in growth and differentiation of hair follicle and to look for growth adjusting factors for dermal papilla cells (DPC). Methods　Dermal papilla cells were isolated and cultivated with two steps method and the cells were identified by immunohistochemical staining for actin. Influence was examined on the adhesion and growth of dermal papilla cells by chondroitin sulfate A, chondroitin sulfate C and heparin sulfate. Results　Two steps method of enzyme digestion for isolating and cultivating dermal papilla cells was an efficient method and large amount of dermal papilla of high purity were harvested with this method. The method is very simple and easy to manege with. Increased adhesion and growth of dermal papilla cells were observed in specimen treated with chondroitin A and heparin sulfate. No significant effects was observed in the cells treated with chondroit in sulfate C. Conclusion　Some extra cellular medium can regulate the adhesion and growth of dermal papilla cells and therefore influence the growth and development of hair follicle.