Objective To investigate the expression of hepatocyte growth factor (HGF) and its receptor c-Met in colorectal cancer tissues and their clinical significances.Methods 100 patients with colorectal cancer who accepted treatment from March 2012 to 2015 February were collected.The immunohistochemical method was used to test the expression of HGF and c-Met in tumor tissues.The correlation of clinicopathological parameters and lymphatic microvessel density (LMVD) was analyzed.Results The positive expression rates of HGF in patients with or without lymph node metastasis were 100.0 ％ (35/35) and 41.5 ％ (27/65),the difference had statistical significance (x2 =6.99,P ＜ 0.05).The positive expression rates of c-Met were 94.3 ％ (33/35) and 47.7 ％ (31/65),the difference was statistically significant (x2 =7.75,P ＜ 0.05).The positive expression rates of HGF in patients with TNM stage Ⅰ + Ⅱ and Ⅲ + Ⅳ were 48.6 ％ (17/35) and 69.2 ％ (45/65),the difference had statistical significance (x2 =5.94,P ＜ 0.05).The positive expression rates of c-Met were 51.4 ％ (18/35) and 70.8 ％ (46/65),the difference was statistically significant (x2 =6.08,P ＜ 0.05).The LMVD of patients with different lymph node metastasis,tumor stage,HGF and its receptor c-Met expression were statistically different (t values were 10.19,10.08,7.50,5.07,all P ＜ 0.05).Conclusion HGF and its receptor c-Met is closely related to the development of colorectal cancer.They can help the diagnosis,and be used as new targets in the treatment of colorectal cancer.

Aim To investigate the effect of U50488H(a selective κ-opioid receptor agonist)and isoproterenol(ISO,a β-adrenergic receptor agonist)on ventricular arrhythmias and Cx43 during myocardial ischemia and reperfusion in rats.Methods 60 rats were randomly divided into five groups,ie,normal control group,I/R group,ISO+I/R group,U50488H+ISO+I/R group,Nor-BNI+U50488H+ISO+I/R group.The incidence of ventricular arrhythmias and arrhythmia score were determined. The expression of Cx43mRNA was tested by RT-PCR.The expression of Cx43 protein in myocardial cell was tested by an immunohistochemical approach with a quantitative imaging system.Results ① Compared with the I/R group,arrhythmia score was increased with administration of ISO(P<0.05).U50488H intravenously injected before ISO significantly decreased the arrhythmia score(P<0.05).② Compared with the normal control group,the expression of Cx43 mRNA was decreased in the I/R group(P<0.05).With administration of ISO,the amount of Cx43 mRNA was not significantly increased.③ Compared with normal control group,total and phosphorylated Cx43 proteins were significantly decreased in the I/R group(P<0.05),and the phosphorylated Cx43 was also decreased with administration of ISO.Compared with ISO+I/R group,phosphorylated Cx43 was increased with administration of U50488H (P<0.05).Conclusion κ-opioid receptor agonist U50488 H antagonizes the arrhythmias through the regulation of Cx43 during myocardial ischemia and reperfusion via inhibiting β-adrenergic receptor pathway.

Objective To design and implement a dynamic simulation system for medical treatments on hospital ship, the application of which can provide evidence for the tactical and technical index of the equipment and the research on medical treatments. Methods Queuing theory and discrete events imitation methods were applied to make research on how to simulate random arrival of the sick and wounded of corresponding various random pattern, organizing of medical resources and medical treatments as well as procedures and rules of medical treatments by means of establishing overall system mathematics model on condition that the amount of the wounded and different distribution of wound type was given. Results The process data and outcome data of medical treatments such as passing ratio were achieved under different running circumstances in the given time. Conclusions The system can imitate the large-scale medical treatment process which can rarely implement many times in reality, meet different needs flexibly, and provide optimization foundation to medical resources configuration on medical ships.

Objective　To evaluate the anti-tumor effects of NDV and two genes of virus(HN and F) on athymic mice with human adenocarcinoma xenografts, and to investigate the mechanisms of its oncolytic role. Methods　The experimental model of lung adenocarcinoma xenograft was established. The two experimental groups of athymic mice were given intratumoral injections of NDV and plasmids only once, and compared with PBS controls in the same time. Measure the volume of tumors for 5 weeks and make a curve of the volume. These mice were killed after 5 weeks, and the weight of the tumors was measured. The histological and ultrastructral changes were observed by electromicroscope and microscope. Results　After one injection of live NDV and plasmids, the tumor growth was significantly suppressed (The median inhibitory rate was 71.62％ and 79.40％ respectively). The median weight of tumor of mice treated with NDV was remarkably lower than that of mice treated with PBS, and that of the mice treated with plasmids (P＜0.01). 14％ of the control group had liver and lung metastasis of the tumor, but no metastasis was found in the experimental groups. A great quantity of NDV viron budding was found in the NDV group. Conclusion　NDV could replicate in human lung adenocarcinoma xenografts, leading directly to a potent anti-tumor effect after one injection of live NDV. During the oncolytic process, the gene HN and gene F may play an important role.

Objective:To compare the embrace fixation and screw fixation in the treatment of inferior tibiofibular syndesmosis injury.Methods:A retrospective study was conducted of the 125 patients who had been treated for ankle fractures and distal syndesmotic injuries at The Hospital Affiliated to Qingdao University from April 2018 to September 2021. They were 79 males and 46 females with an age of (25.4±11.2) years. The patients were divided into 2 groups according to their fixation methods: an observation group of 75 cases subjected to embrace fixation and a control group of 50 cases subjected to conventional screw fixation. Their reduction was evaluated by comparing the disparities between the affected and normal sides in the anterior and posterior syndesmotic distances, fibular translation distance, and fibular rotation angle between the 2 groups after surgery. Intraoperative immobilization time for the inferior tibiofibular syndesmosis, American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot score, Olerud-Molander ankle function score, and visual analog scale (VAS) for pain were also compared at the last follow-up between the 2 groups.Results:There was no statistically significant difference in the preoperative baseline data between the 2 groups of patients, indicating comparability ( P>0.05). There was no statistically significant difference between the 2 groups in intraoperative immobilization time for the inferior tibiofibular syndesmosis, disparity between the injured and normal sides in postoperative fibular translation distance, or VAS pain score at the last follow-up ( P>0.05). The anterior and posterior syndesmotic distances, disparity between the injured and normal sides in fibular rotation angle, AOFAS ankle-hindfoot score, and Olerus-Molander ankle function score in the observation group [0.1 (-0.2, 0.3) mm, 0.1 (-0.3, 0.5) mm, -0.5 (-1.1, 0.8)°, 96 (93, 100) points, and 95 (90, 100) points] were all significantly better than those in the control group [1.4 (0.6, 2.1) mm, 1.5 (0.9, 2.2) mm, 1.2 (-3.8, 3.7)°, 93 (89, 96) points, and 90 (85, 100) points] (all P<0.05). There was no major complication or nonunion in the observation group. Conclusion:The embrace technique can provide an accurate and effective fixation for the inferior tibiofibular syndesmosis in patients with ankle fracture and lead to better clinical and radiographic outcomes than conventional screw fixation.

Idiopathic pulmonary fibrosis(IPF)is a chronic and fatal interstitial lung disease that poses a serious threat to human health and life,and currently there is no specific treatment for it except lung transplantation.The theory of traditional Chinese medicine(TCM)holds that Qi deficiency and blood stasis are the critical pathogenesis of IPF,so the therapy of invigorating Qi and activating blood circulation is established as the important method for the treatment of IPF.Studies have found that the prescriptions for invigorating Qi and activating blood have definite efficacy in improving the clinical symptoms of patients with IPF and delaying the progression of the disease.Based on its clinical effectiveness,a large number of researches have been carried out on the relevant mechanism of invigorating Qi and activating blood circulation in the treatment of IPF in recent years.In this paper,we systematically reviewed the relevant literature,and made a review on the mechanism of Qi-invigorating and blood-activating therapy in the treatment of IPF from the aspects inhibiting inflammation,improving the metabolism of extracellular matrix,intervening epithelial/endothelial-mesenchymal transformation,resisting oxidative stress,reducing angiogenesis,activating cellular autophagy,regulating immune balance and fibrinolytic activity,so as to reveal the scientific connotation of Qi-invigorating and blood-activating therapy and provide a theoretical basis for the clinical application of this therapy in the treatment of IPF.

Objective To evaluate the safety and efficacy of transcatheter arterial embolization (TAE) in the management of refractory hematuria of prostatic origin (RHPO). Methods This retrospective study from 6 hospitals in china consisted of 31 patients (mean age 75.0±7.5 years, range 58 to 84 years) who underent transcatheter arterial embolization (TAE) for RHPO between February 2011 and January 2017. Patients with RHPO who had complete imaging and clinical data were enrolled. Patients with incomplete clinical data, inability to assess hemostasis, and contraindications to TAE were excluded. The cause of RHPO was benign prostatic hyperplasia (BPH) in nine patients, prostate cancer in twelve, transurethral resection of prostate in four, open prostatectomy in two and prostatic sarcoma in four. Superselective arterial embolization, non-superselective arterial embolization or intra-arterial infusion chemotherapy was performed according to the etiology and angiography. Angiographic findings, technical success rate, clinical success rate, complications were recorded. Results Of the 31 patients, 6 patients (19.4％) were with active bleeding, 4 (12.9％) with aneurysm and 27 (87.1％) with abnormal neovascularization on the angiogram. The 31 patients underwent a totle of 37 TAE, the technical success rate was 100.0％(37/37) and the recent hemostasis success rate was 90.3％(28/31). The incidence of mild complications was 38.7％(13/31), there was no serious complication associated with TAE. Conclusion TAE is a safe and effective method for the treatment of refractory hematuria of prostatic origin.

Objective:To investigate the clinical effect of free posterior tibial artery perforator flap in repair of forefoot soft tissue defect.Methods:From January 2017 to January 2021, a retrospective study was conducted on 13 patients with forefoot soft tissue defect, metatarsal head exposed, and forefoot transverse arch integrity, including 9 males and 4 females. The age was (40.0±13.0) years old. Cause of injury: 8 cases of traffic accident injury, 5 cases of heavy object smashing injury. Seven cases had forefoot skin defect and toe damage, and 6 cases had forefoot skin avulsion injury, open toe fracture with tendon, blood vessel and nerve injury. The wound area was 4.5 cm×3.0 cm-8.0 cm×6.0 cm. VSD treatment was performed in the first stage, and free posterior tibial artery perforator flap was used for the second stage. The flap area was 5.5 cm×4.0 cm-9.0 cm×7.0 cm. Outpatient reviews scheduled at 1, 2, 3, and 6 months after surgery, through outpatient clinic, telephone or WeChat. The flaps were evaluated according to appearance, texture, sensory recovery, and the American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hind foot function scoring system.Results:All 13 flaps survived. The follow-up lasted for 6 to 24 months. The feet were in good shape, walking with weight beries, and the flaps had satisfactory appearance without wear and tear. Five cases were S 3, 6 were S 2, and 2 were S 1. According to AOFAS ankle-hindfoot function score, 4 had excellent scores, 7 were in good, and 2 in fair. Conclusion:The free posterior tibial artery perforator flap has relatively constant perforators, and the pedicle of the middle and upper perforators is longer, and the flap can build part of the sensation. Posterior artery perforator flap is a good flat for repairing the soft tissue defects of the metatarsal head of the forefoot.

Objective:To investigate the different types of renal artery involvement in Stanford type B aortic dissection (TBAD) and the comparison of clinical effecacy after thoracic endovascular aortic repair (TEVAR).Methods:This is a retrospective cohort study included 330 patients with TBAD and renal artery involvement treated with TEVAR from June 2002 to September 2021 in General Hospital of Northern Theater Command of the PLA. According to aortic CTA image, unilateral renal artery involvement conditions were divided into 5 types: the true lumen type (renal artery opening completely from the true lumen), false lumen type (renal artery opening completely from the false lumen), double lumen type (renal artery opening from the true and false double lumen), compression type (renal artery opening connected with the true lumen, but the renal artery opening was extremely squeezed by the inner membrane), open type (renal artery opening with intimal tear). There were seven types of bilateral renal artery involvement: true-true type (true lumen-true lumen type), true and false type (true lumen-false lumen type), true-double type (true lumen-double lumen type), true-opening type (true lumen-opening type), false-false type (false lumen-false lumen type), false-compression type (false lumen-compression type), double-double type (double lumen-double lumen type). The primary observation index of this study was the comparison of postoperative renal function and the incidence of clinical adverse events of different types of renal artery involvement. One-way ANOVA test, Kruskal-Wallis H test and paired sample rank sum test were used to compare postoperative renal function between different types of bilateral renal artery involvement. The Chi-square test or Fisher′s exact probability test were used to compare the near and long term adverse events between different types of bilateral renal artery involvement. Kaplan-Meier method was used to compare the all-cause mortality of patients with severe renal functional injury and non-severe renal functional injury before surgery. Results:The average age of the patients included in this study was (53±11) years, including 276 males (83.6%) and 54 females (16.4%). There were statistical difference in the level of serum creatinine (preoperative: H=18.686, P=0.005, postoperative: H=18.101, P=0.006) and cystatin C (preoperative: H=17.566, P=0.007, postoperative: H=10.433, P=0.016), pre-and post-operative, between the seven groups of TBAD patients with different renal artery involvement types ( P<0.05), and the false-false type group shown the worst kidney function. However, no statistically significant differences were shown when comparing their pre- and post-operative change values ( P>0.05). The 30-day follow-up result showed that there were statistically significant differences in the incidence of postoperative acute kidney injury ( χ2=15.623, P=0.007), aorta-related adverse events ( χ2=15.523, P=0.010), and intraoperative endoleak ( χ2=17.935, P=0.004) among the seven groups, and the false-false group was the highest (2/9, 5/9 and 5/9, respectively). In terms of long-term follow-up results, there were statistically significant differences in all-cause death ( χ2=14.772, P=0.011) and non-aortic death ( χ2=15.589, P=0.008) among the seven groups. Kaplan-Meier survival analysis showed that patients with worse pre-operative renal function showed higher long-term all cause death (17.7% vs. 4.8%, P=0.009). Conclusions:For TBAD patients with renal artery involvement, there were differences in renal function among different types, and TEVAR showed no significant effect on renal function in TBAD patients. The long-term all cause death was higher in patients with worse renal function pre-operative.

Objective:To investigate the changes in cardiopulmonary exercise testing (CPET) characteristics before and after the outbreak of COVID-19 in patients with acute coronary syndrome (ACS) who underwent percutaneous coronary intervention (PCI).Methods:This is a cross-sectional study that included ACS patients who underwent PCI at the General Hospital of the Northern Theater Command from July 2018 to February 2023. Based on the timeline of the COVID-19 pandemic, patients were divided into two groups: the pre-pandemic group and the during-pandemic group, with January 2020 as the dividing line. Clinical data were collected from both groups, and a comparative analysis was performed on their postoperative CPET outcomes, including peak oxygen uptake (peak VO 2), peak metabolic equivalents (peak MET), and other indicators. Weber′s classification was used to assess cardiac function. In addition, the 7-tiem generalized anxiety disorder scale (GAD-7) and the patient health questionnaire-9 (PHQ-9) were used to assess the patients′ psychological anxiety and depression states, respectively. Multivariate logistic regression was used to analyze the influencing factors of CPET after PCI. Results:A total of 4 310 post-PCI ACS patients were included, with an average age of (58.7±9.1) years, and 3 464 (80.37%) were male. There were 1 698 patients in the pre-pandemic group and 2 612 patients in the during-pandemic group. The main indicator of the CPET, peak VO 2 (15.04±3.93) ml·min -1·kg -1 in the during-pandemic group, was lower than that in the pre-pandemic group (15.52±3.68) ml·min -1·kg -1, and the difference was statistically significant ( P<0.001). Multivariate logistic regression analysis showed that advanced age, female gender, high body mass index, elevated high-sensitivity C-reactive protein, reduced high-density lipoprotein cholesterol, smoking history, history of myocardial infarction, more severe ACS classification, and mild to moderate degree of depression were related to poor cardiopulmonary outcomes ( P<0.05). Conclusion:The COVID-19 pandemic had a negative impact on the cardiopulmonary outcomes of ACS patients after PCI. Reduced physical activity, and increased psychological stress should be given consideration and attention regarding their impact on patients′ cardiopulmonary function.