Objective To compare the effect of different partition of nucleic acid protein complex on the affinity of enriched library in systematic evolution of ligands by exponential enrichment (SELEX). Methods Two protocols were adopted to select the enriched library to transforming growth factor ? receptor Ⅱ(TGF ? RⅡ). Protocol 1: protein was absorbed on the surface of 96 well plate; then, selection was carried out; the binding nucleotide acids were eluted from the supporter directly. Protocol 2: selection was done in solution; nucleotide acid protein complex was captured in nitrocellulose membrane; the binding nucleotide acids were obtained from membrane. Filter biding assay and gel shift assay were performed to detect the affinity of the enriched ssDNA library from different protocols. Results After 4 rounds of selection, the affinity to TGF ? RⅡ was obviously improved in the enriched library from protocol 2 compared with the initial library, while no such improvement was found in the enriched library from protocol 1. Conclusion In the SELEX experiment, the way of selection in solution, then partition of the binding nucleotide acids in filter is easier to enrich the binding fragment from initial ssDNA random library, compared with the way of fixation of target protein to solid supporter, then selection between the solid phase and liquid phase and elution of the binding nucleotide acids from supporter.

OBJECTIVETo detect the expression of cell cycle positive regulators cyclin D(1), cyclin E, CDK(2), CDK(4) and negative regulators p21(cip1), p27(kip1), p16(ink4a) and p15(ink4b) during wound healing in rats.

METHODSOpen wounds of full-thickness skin, diameter 1.8 cm, on rat backs were used as the wound model. Wound tissues were harvested on postwounding days 3, 5, 7, 9, 11, 14, 21 and 30. Ki67 expression in granulation tissue was detected by immunohistochemical assay. The patterns of the expression of cyclin D(1), cyclin E, CDK(2), CDK(4) and p21(cip1), p27(kip1), p16(ink4a), p15(ink4b) were detected by Western blot.

RESULTSCell proliferation in granulation tissue took place predominantly within the first week after injury, with the proliferation peak occurring at postwounding day 5. There were no dramatic variations in the expression of cyclin D(1), CDK(2) and CDK(4) during wound healing. Up-regulated cyclin E was maintained from day 3 to 11 after injury, and then was down-regulated. No expression of p16(ink4a) and p15(ink4b) was found. p21(cip1) was expressed only from day 7 to 14, with peak expression observed on day 9. Constitutive p27(kip1) was expressed throughout wound healing with low levels in the proliferating period of day 3 to 5 and with increased levels in the post-mitotic and remodeling stage. The expression of p21(cip1) and p27(kip1) showed an inverse gradient to that of Ki67.

CONCLUSIONp21(cip1) and p27(kip1) play a supervising role in preventing the hyperproliferative tendency in tissue repair.

Animals ; Cell Cycle ; physiology ; Cell Cycle Proteins ; biosynthesis ; physiology ; Cell Division ; physiology ; Cyclin-Dependent Kinase Inhibitor p16 ; biosynthesis ; Cyclin-Dependent Kinase Inhibitor p27 ; Cyclin-Dependent Kinases ; antagonists & inhibitors ; biosynthesis ; Cyclins ; biosynthesis ; Male ; Rats ; Rats, Wistar ; Skin ; cytology ; metabolism ; Tumor Suppressor Proteins ; biosynthesis ; physiology ; Wound Healing

Objective To evaluate left ventricular function of acute myocardial infarction (AMI) patients who underwent autologous bone marrow mononuclear cells (BMMNC) after percutaneous coronary intervention (PCI) transplantation with tissue Doppler imaging (TDI). Methods Forty-eight male patients with AMI were divided into experimental group and control group (each n=24). PCI was performed within 24 hours after attach. Patients in experimental group received autologous BMMNC transplantation 7-14 days after PCI. Conventional echocardiography and TDI were performed before and 1, 3 and 6 months after treatment. Left ventricular ejection fraction (LVEF), peak systolic (S_a, S_m), early diastolic (E_a, E_m) and late diastolic (A_a, A_m) mitral velocities and regional myocardial velocities were obtained with conventional echocardiography or TDI, and compared between the two groups. Results There was no significant difference of each index between two groups before operation. Compared with the control group, S_a, S_m, E_m, E_a/A_a and Em/Am improved significantly in experimental group at each follow-up time point; LVEF and E_a were significantly higher than those of control group 3 and 6 months after treatment. Conclusion Combination of PCI and autologous BMMNC transplantation is more helpful to improve regional and global cardiac systolic and diastolic function after myocardial infarction, which can be quantitatively evaluated with TDI.

OBJECTIVETo explore the postburn adhesion properties of polymorphonuclear leukocyte (PMN) onto pulmonary vascular endothelial cells (PVEC) in burn patients with acute lung injury (ALI), so as to determine the role of C5a on PVEC-PMN adhesion.

METHODSMicrotubule sucking technique was employed to determine the PVEC-PMN adhesion. The myeloperoxidase (MPO) was also assayed to reflect the magnitude of PVEC-PMN adhesion.

RESULTSThe magnitude of PVEC-PMN adhesion increased and the adhesion force increased along with an increase in rh-C5a concentration. Simultaneously, the MPO activity was increased, which could be inhibited by anti-C5aR McAb in a concentration 1:104.

CONCLUSIONBoth C5a and C5aR participated in PVEC-PMN adhesion, which might be important in the pathogenesis of ALI.

Acute Disease ; Antibodies, Monoclonal ; pharmacology ; Antigens, CD ; immunology ; Burns ; blood ; complications ; Cell Adhesion ; drug effects ; Cells, Cultured ; Complement C5a ; pharmacology ; Dose-Response Relationship, Drug ; Endothelium, Vascular ; cytology ; drug effects ; Fetus ; Humans ; Lung ; Lung Diseases ; complications ; Neutrophils ; cytology ; drug effects ; enzymology ; Peroxidase ; antagonists & inhibitors ; drug effects ; metabolism ; Receptor, Anaphylatoxin C5a ; Receptors, Complement ; immunology

Objective To evaluate the effects of measures on the schistosomiasis control after the earth quake in Lushan County so as to provide the experiences for post-disaster schistosomiasis control. Methods The measures taken in schistosomi-asis control after the earth quake were reviewed in Lushan County in 2013 and the epidemic situation of schistosomiasis was in-vestigated and the results were analyzed. Results The schistosomiasis control in floating population and the control of Oncome-lania hupensis snails were enhanced and no schistosome infections were found in both human and livestock. No infected snails and infested water were found. Conclusion The measures of schistosomiasis control after the disaster are effective in Lushan County and the goal to prevent major plague after the earth quake is achieved.

Objective To investigate the expression of melanoma antigen- encoding gene (MAGE) A1 protein in esophageal squamous cell carcinoma, and explore its correlation with the clinicopathological factors and prognosis. Methods A retrospective analysis was performed on 197 patients with esophageal squamous cell carcinoma who accepted radical surgical treatment from January 2006 to December 2012. The expressions of MAGEA1 protein in these specimens of cancer tissue and cancer adjacent tissue were detected by immunohistochemistry with tissue microarray technology. Results MAGEA1 protein was expressed in cytoplasm and nucleus of tumor cells. The positive expression rate of MAGEA1 protein in cancer tissue was significantly higher than that in cancer adjacent tissue: 73.6％ (145/197) vs. 5.6％ (11/197), and there was statistical difference (P<0.01). The positive expression of MAGEA1 protein had no correlations with sex, age, history of smoking/drinking, family history of upper gastrointestinal cancer, depth of tumor invasion, lymph node metastasis, tumor differentiation, location and TNM stage (P>0.05). Kaplan-Meier survival analysis result showed that the 5-year survival rate in patients with MAGEA1 protein positive expression was significantly lower than that in patients with MAGEA1 protein negative expression (37.2％ vs. 53.8％), and there was statistical difference (P=0.018). Multivariate analysis result showed that MAGEA1 protein positive expression was an independent predictor of prognosis in esophageal squamous cell carcinoma patients (HR=1.91, 95％CI 1.22 to 2.98, P = 0.004). Conclusions The expression of MAGEA1 protein is abundant in esophageal squamous cell carcinoma, and is related to worse clinical outcome. MAGEA1 protein could be a candidate target for tumor immunotherapy.

Objective: To investigate the efficacy of modified Quyuan decoction in the treatment of Children upper airway cough symptom complex with syndrome of phlegm and heat accumulated in lung. Methods: Eighty-two Children with upper airway cough symptom complex who met the inclusion criteria were randomly divided into 2 groups with 41 in each group. In the control group, monteluster sodium chewing tablets were taken orally and budesonide suspension was inhaled. The observation group took modified Quyuan decoction on the basis of the control group. Both groups were treated continuously for 2 weeks and followed up for 6 months. The levels of interleukin (IL)-8 and IL-13 were detected by double-antibody-sandwich ELISA, and the symptoms and signs were scored before and after treatment, as well as the symptoms of phlegm, heat and stagnation of lung, cough and pharynx. The efficacy was evaluated and recurrence rate was recorded. Results: The total effective rate 95.12% (39/41) in the observation group was obviously higher than 75.61% (31/41) in the control group (χ²=4.783, P=0.029). After treatment, the serum level of IL-8 (51.61 ± 5.94 ng/L vs. 71.25 ± 7.99 ng/L, t=12.631) and IL-13 (27.62 ± 3.20 ng/L vs. 34.91 ± 4.01 ng/L, t=9.099) in the observation group were significantly lower than those in the control group (P<0.01). After treatment, the scores of cough, nasal obstruction, runny nose, nasal itching, expectoration, sneezing, secretion of posterior pharyngeal wall and pharyngeal mucosa in the observation group were all significantly lower than those in the control group (t values were 7.762, 6.831, 6.217, 6.944, 6.408, 6.212, 7.268, 7.109, all Ps<0.01). The scores of cough, expectoration, blood in sputum, chest pain, dry mouth and fever were significantly lower than those of the control group (t values were 9.439, 6.831, 6.982, 10.115, 12.031 and 10.443, all Ps<0.01). Scores of daytime and nighttime cough symptoms were significantly lower than those of the control group (t values were 7.012, 7.241, respectively, all Ps<0.01). The scores of pharyngeal pain, pharyngeal dryness and pharyngeal foreign body sensation were significantly lower than those of the control group (t values were 6.003, 6.106, 6.318, respectively, all Ps<0.01). In the 6 months' follow-up observation, the recurrence rate was 17.7% (3/17) in the observation group and 53.9% (7/13) in the control group, and the difference between the two groups was statistically significant (χ²=4.344, P=0.037). Conclusions The modified Quyuan decoction combined with conventional western medicine can improve the symptoms and signs of upper airway cough symptom complex of children with syndrome of phlegm and heat accumulated in lung.

Objective    To evaluate the influence of clinical, pathological and treatment factors on the prognosis of thymic carcinoma patient accepted surgical treatment. Methods    Retrospective analysis was performed on 38 patients with thymic carcinoma undergoing surgical treatment between January 2008 and December 2017. The association between the prognostic factors including age, sex, thymectomy, radical resection, pathological type, TNM stage, Masaoka-Koga stage, tumor size, and survival was assessed using the Kaplan-Meier method. Results    The 5-year overall survival rate of our cohort was 51.9%. Kaplan-Meier univariate survival analysis showed that radical resection (P=0.003), TNM stage (P=0.038), Masaoka-Koga stage (P=0.033), and tumor size (P=0.030) were related to the prognosis of patients with thymic carcinoma. Radical resection was also validated as an independent prognostic factor in multivariate Cox analysis (P=0.009, hazard ratio 2.31, 95%CI 1.23-4.33). Conclusion    Radical surgical treatment could improve the prognosis of patients with resectable thymic carcinoma.

Objective    To evaluate the safety and application value of three-dimensional reconstruction for localization of pulmonary nodules in thoracoscopic lung wedge resection. Methods    The clinical data of 96 patients undergoing thoracoscopic lung wedge resection in our hospital from January 2019 to August 2020 were retrospectively reviewed and analyzed, including 30 males and 66 females with an average age of 57.62±12.13 years. The patients were divided into two groups, including a three-dimensional reconstruction guided group (n=45) and a CT guided Hook-wire group (n=51). The perioperative data of the two groups were compared. Results    All operations were performed successfully. There was no statistically significant difference between the two groups in the failure rate of localization (4.44% vs. 5.88%, P=0.633), operation time [15 (12, 19) min vs. 15 (13, 17) min, P=0.956], blood loss [16 (10, 20) mL vs. 15 (10, 19) mL, P=0.348], chest tube placement time [2 (2, 2) d vs. 2 (2, 2) d, P=0.841], resection margin width [2 (2, 2) cm vs. 2 (2, 2) cm, P=0.272] or TNM stage (P=0.158). The complications of CT guided Hook-wire group included pneumothorax in 2 patients, hemothorax in 2 patients and dislodgement in 4 patients. There was no complication related to puncture localization in the three-dimensional reconstruction guided group. Conclusion    Based on three-dimensional reconstruction, the pulmonary nodule is accurately located. The complication rate is low, and it has good clinical application value.