To study the influence of maggot secretion on expression of bFGF and connective tissue growth factor(CTGF) in ulcer tissue of diabetes mell itus(DM)rats and its antibacterial function. Methods There were 40 3-month-old SD male rats (weighing 300-350 g) which were randomly divided into 2 groups: control group and experimental maggot secretion group. The model of ulcer wound of DM rats was made. The ulcer wound of DM rats in maggot secretiongroup spread maggot secretions, but no secretion on ulcer wound was found in control group. The morphological and tissue changes of ulcer wound were observed at different times, and the conditions of bacterial infection on ulcer wound in the two groups were checked. Tissue sl ices were prepared on 7, 14 and 21 days, respectively; immunohistological detection of bFGF and CTFG in ulcer wound of the two groups was done; and the cell number of positive expression of bFGF and CTFG was counted. Results It was found that the heal ing of ulcer was dominant in experimental group; the wound was clean; the tissue regenerated and no Staphylococcus aureus infection was seen. Bad heal ing was obtained in control group; tissue necrosis was found and the rate of Staphylococcus aureus infection was 60%. Positive expression cell number of bFGF in ulcer wound was detected on 7 and 14 days after operation with 23.76 ± 3.34 and 52.76 ± 4.84 in experimental group, and 18.88 ± 2.16 and 46.04 ± 4.00 in control group. Positive expression cell number of CTGF in ulcer wound was detected on 7 and 14 days after operation with 18.76 ± 3.24 and 46.52 ± 4.07 in experimental group, and 12.52 ± 3.03 and 40.52 ± 3.96 in control group. There was significant difference between positive expressions of bFGF and CTFG in the two groups (P﹤0.05). Conclusion The maggot secretion can elevate the expressions of bFGF and CTFG in ulcers, promote heal ing and prevent bacterial infection.
Objective To assess the effectiveness of the auto-continuous positive airway pressure (Auto-CPAP) versus the fixed-continuous positive airway pressure (Fixed-CPAP) in patients with obstructive sleep Apnea syndrome (OSAS). Methods Such databases as PubMed (1990 to 2010), SpringerLink (1995 to 2010), CNKI (1990 to 2010), WanFang Data (1995 to 2010), and Google academic (1994 to 2010) were searched, the relevant conference theses were retrieved, and the experts in this field were enquired to collect the randomized controlled trials (RCTs) on Auto-CPAP versus Fixed-CPAP for patients with OSAS. Two reviewers independently screened the trials according to inclusion and exclusion criteria, abstracted the data, and assessed the methodology quality. Meta-analyes was performed using RevMan 5.0 software. Results A total of 11 RCTs involving 327 patients were included. The results of meta-analyses showed that, compared with the Fixed-CPAP group after treatment, the Auto-CPAP group significantly reduced the mean effective therapeutic pressure (WMD=-1.79, 95%CI -3.39 to -0.20), won much better treatment adherence (WMD=0.43, 95%CI 0.30 to 0.56), but got much higher scores of the Apnea-hypopnea index (AHI) (WMD=1.17, 95%CI 0.25 to 2.08) and Epworth Sleepiness Scale (ESS) (WMD=0.88, 95%CI 0.42 to 1.33) as well. There was no significant difference between those two groups in patients’ subjective preference for treatment (OR=2.06, 95%CI 0.46 to 9.10). Conclusion Compared to the Fixed-CPAP, the Auto-CPAP significantly reduces the mean effective therapeutic pressure and improves the treatment adherence of the patients, but is inferior in decreasing AHI and ESS. However, more high-quality and large-scale RCTs are required to verify the above conclusion because of the limitation of research quality and sample at present.
The convolutional neural network (CNN) could be used on computer-aided diagnosis of lung tumor with positron emission tomography (PET)/computed tomography (CT), which can provide accurate quantitative analysis to compensate for visual inertia and defects in gray-scale sensitivity, and help doctors diagnose accurately. Firstly, parameter migration method is used to build three CNNs (CT-CNN, PET-CNN, and PET/CT-CNN) for lung tumor recognition in CT, PET, and PET/CT image, respectively. Then, we aimed at CT-CNN to obtain the appropriate model parameters for CNN training through analysis the influence of model parameters such as epochs, batchsize and image scale on recognition rate and training time. Finally, three single CNNs are used to construct ensemble CNN, and then lung tumor PET/CT recognition was completed through relative majority vote method and the performance between ensemble CNN and single CNN was compared. The experiment results show that the ensemble CNN is better than single CNN on computer-aided diagnosis of lung tumor.
ObjectiveTo investigate the prognosis after breast conserving surgery (BCS) and modified radical mastectomy (MRM) in patients with stage Ⅰ–Ⅱ breast cancer, and analyze the factors related to locoregional recurrence (LRR).MethodsThe clinicopathologic and prognostic data of patients with stage Ⅰ–Ⅱ breast cancer who underwent the surgical treatment in the First Affiliated Hospital of Chongqing Medical University from January 2011 to December 2014 were analyzed. The clinicopathologic characteristics and prognostic differences of the BCS group and MRM group were compared. The factors related to LRR of patients underwent the BCS and MRM were analyzed.ResultsA total of 1 330 patients with stage Ⅰ–Ⅱ breast cancer were included in this study, including 230 in the BCS group and 1 100 in the MRM group. Compared with the MRM group, the patients in the BCS group had higher height (P<0.001), younger age (P<0.001), smaller tumor diameter (P<0.001), and less axillary lymph node metastasis (P<0.001). Up to August 2019, 149 cases (18 cases in the BCS group and 131 cases in the MRM group) were lost, with a follow-up rate of 88.8%. The median follow-up time was 71 months (4－103 months). The LRR rate of the BCS group was higher than that of the MRM group (6.1% versus 2.5%, χ2=7.002, P<0.01). The locoregional recurrence-free survival of the MRM group was better than that of the BCS group (χ2=7.886, P<0.01). However, there were no statistical differences between the two groups in terms of the distant metastasis-free survival and disease-free survival (P>0.05). In the patients underwent the BCS, the HER-2 was associated with the LRR (P<0.05), and the axillary lymph node metastasis was associated with the LRR in the patients underwent the MRM (P<0.05).ConclusionsAccording to results of this study, although there is a significant difference in locoregional recurrence-free survival between BCS group and MRM group in patients with stage Ⅰ–Ⅱ breast cancer, there are no statistical differences in distant metastasis-free survival and disease-free survival between the two groups. Therefore, it is safe and feasible for choosing appropriate patients with stage Ⅰ–Ⅱ breast cancer to underwent breast-conserving treatment.