Objective To explore the effect of macrolide antibiotics(erythromycin) on tumor necrosis factor(TNF)-α and interleukin(IL)-8 in hyperoxia-induced lung tissue of premature newborn rats,and to study the intervention effect of erythromycin on hyperoxia-induced lung injury.Methods One-day old preterm Sprague Dawley rats were randomly divided into four groups by random number table method:air + sodium chloride group,air + erythromycin group,hyperoxia + sodium chloride group,hyperoxia + erythromycin group.Hyperoxia groups were continuously exposed to oxygen (oxygen ＞ 0.85) and air group in room air.After 1,7,14 days of exposure,the preterm rats of four groups were sacrificed,whole lung of these rats were isolated,the lung histological changes were observed by hematoxylin-eosin staining,TNF-α and IL-8 in pulmonary tissue homogenate were detected by ELISA.Results The results showed that:(1) Compared with air + sodium chloride group,TNF-α and IL-8 expression in hyperoxia + sodium chloride group were significantly increased(P ＜ 0.05) after 1,7 days of exposure [1 d:TNF-α:(16.163 ± 0.574) ng/ml vs.(21.923 ±2.066) ng/ml,IL-8:(18.214 ±3.649) ng/ml vs.(23.546 ± 5.240) ng/ml ;7 d:TNF-α:(15.940 ±0.821) ng/ml vs.(19.688 ±0.764) ng/ml,IL-8:(18.541 ± 4.114) ng/ml vs.(24.255 ±4.692) ng/ml],in particular,TNF-α expression appeared to increase earlier,their expression became significantly weak in 14 days (P ＜ 0.05).(2) Compared with hyperoxia + sodium chloride group,TNF-α and IL-8 expression in hyperoxia +erythromycin group became significantly weak after 1,7,14 days of exposure(P ＜0.05) after the intervention of erythromycin [1 d:TNF-α:(21.923 ± 2.066) ng/ml vs.(18.903 ± 1.851) ng/ml,7 d:IL-8:(24.255 ±4.692) ng/ml vs.(23.508 ±3.543) ng/ml,14 d:TNF-α:(16.443 ±5.466) ng/ml vs.(14.453 ±0.963)ng/ml],but their expression became weaker in 14 days than that in 1,7 days.Conclusion The release of inflammatory mediators TNF-α and IL-8 induced by oxidation outbreak participates in the development of hyperoxia induced lung injury,erythromycin may regulate immune function,inhibits the levels of oxidant-mediated TNF-α and IL-8 induced by oxidation outbreak,and alleviate hyperoxia lung injury in premature rats.

Objective To establish a flow cytometric measurement of detecting minimal residual disease(MRD) according to the leukemia-associated immunophenotypes in children with acute lymphoblastic leukemia(ALL) and to explore the significance of MRD detection in ALL children for a individualized treatment. Methods A variety of four-color fluorescent antibody combinations were used to investigate the children's normal bone marrow. The normal bone marrow pattern at two-parameter plots was established to identify the residual tumor cells, seventy-five bone marrow samples from newly diagnosed ALL children were analyzed with four-color cytometry to determined the optimal combinations which can clearly distinguish the tumor cells from normal cells. The bone marrow samples were monitored with the combination panel in 60 patients at the end of induction therapy and follow-up treatment. Cytomorphology test, PCR amplification of 29 fusion genes as well as IgG and TCR gene rearrangements were performed simultaneously. Results Sixty-nine cases (92.0%) could be identified for effective antibody combinations to monitor MRD by four-color cytometry. Fusion genes or IgG and T cell receptor (TCR) gene rearrangements can be detected in 21 cases (28.0%) to monitor MRD by PCR. No MRD can be detected in 25 bone marrow samples at the end of induction therapy and follow-up treatment. Four-color cytometry could detect as low as 0.021%-4.130% residual leukemia cells. Conclusion MRD can be monitored by flow cytometry which is faster than PCR, and the sensitivity is superior to morphology method.

BACKGROUND: A great quantity of cell loss in early stage following stem cell transplantation can significantly affect transplantation effect. Presently, it is confirmed that overexpression of AKT1 gene significantly inhibit cell apoptosis. OBJECTIVE: To explore whether AKT1 gene overexpression can block stem cell apoptosis under hypoxic condition following pig autologous bone marrow mesenchymal stem cell (BMSC) transplantation, and the effect of repairing damaged myocardium. DESIGN, TIME AND SETTING: The randomized controlled animal study was performed at the Soochow University from August 2005 to February 2007.MATERIALS: A total of 24 healthy male Meishan pigs were supplied by the Animal Experimental Center of Soochow University. METHODS: The CDS (regulation domin of AKT1) AKT1-cDNA fragment was amplified. Lentivector Packaging Kit was used to transfect BMSCs after synthesized with pCDH1-AKT1 shuttling plasmid. Following BrdU labeling, models of myocardial infarction were constructed by occluding the distal left anterior descending coronary artery in pigs with gelatin sponge. 4 weeks later, pigs were randomly divided into four groups: the model control group, the DMEM group, the BMSCs group, and the AKT-transfected group. In model control group, there was no other injection after occluding the left anterior descending coronary artery. In the DMEM group, 5 mL DMEM was injected into the coronary artery. 5 mL BMSCs (1×10~7 cells) were infused into the coronary artery in the BMSCs group. 5 mL BMSCs transfected with the AKT1 gene were injected in the AKT-transfected group MAIN OUTCOME MEASURES: Western blot analysis and real time RT-PCR were used to test the plasmid. The cardiac function was evaluated by magnetic resonance image. Histological characteristics of the myocardium were observed using immunohistochemistry. Serum vascular endothelial growth factor and transforming growth factor β1 levels were determined by ELISA. RESULTS: AKT1-cDNA was cloned into pCDH1-MCS1-EF1-copGFP and the sequence was confirmed in comparison with the published one. AKT mRNA expression could be detected distinctly 24 and 48 hours after transfecting cells. The expression of AKT1 intensity in MSCs remained strong 2 weeks later with detected by real time RT-PCR and Western blot analysis. AKT1-mRNA transcriptional levels were 120 times of primary cells. Before the cell implantation, the left ventricular end-diastolic dimension increased and the stroke volume decreased in the myocardial infarction hearts. The cardiac function was significantly improved after cell implantation, and the implanted MSCs prevented the infarct region from thinning and expanding, improved contraction and increased perfusion in all groups relative to the control hearts. The left ventricular chamber size was smaller in the hearts with being transplanted cells than that in the control hearts. Moreover, the improvement was even markedly greater in AKT-transfected group (P < 0.05). Hematoxylin-eosin staining results showed that fibering was significant in the model control group and DMEM group. Island-like myocardium was observed in the infarct zone of the BMSCs group and AKT-transfected group, and plenty of small vessels-shape structure was detected in the AKT-transfected group. Immunohistochemistry demonstrated that Von Willebrand Factor (vWF) and Cx-43 expression was determined in the myocardium in the BMSCs group and AKT-transfected group, and the proportion of BrdU and Cx-43-positive cells to BrdU-positive cells was significantly greater in the AKT-transfected group compared with the BMSCs group 4 weeks following transplantation (P < 0.05). Following cell transplantation, vascular endothelial growth factor levels were gradually increased, peaked at 1 week, gradually decreased, and reached a normal level at 4 weeks. Transforming growth factor p1 levels were gradually reduced, and significantly less than the model control group, DMEM group 4 weeks later (P < 0.05), and significantly lower than that pretransplantation (P < 0.05).CONCLUSION: Using lentiviral vector to construct with AKT1 gene could stably make BMSCs overexpress AKT1. The BMSCs engraftment in host myocardium might improve the left ventricle function by attenuating the contractile dysfunction and pathologic thinning in this model of left ventricular wall infarction. AKT1 overexpression can significantly improve cardiac function following infarction.

Objective:To explored the correlation between anxiety and depression and cerebral small vessel disease(CSVD)in the elderly patients with type 2 diabetes mellitus(T2DM), and analyzed the influencing factors of anxiety and depression.Methods:Clinical data of 101 elderly T2DM inpatients admitted to the Department of Endocrinology, the Second Affiliated Hospital of Fujian Medical University from July 2020 to December 2021 were retrospectively analyzed, and clinical features, laboratory tests and examination data were collected.The Hamilton Depression Scale and the Hamilton Anxiety Scale were used for assessment, with a cut-off value of 14 points for anxiety and 8 points for depression.Brain scans were performed using 3.0T magnetic resonance scanner, including T1WI sequence, T2WI sequence, 3D-FLAIR sequence, SWI sequence.According to the total MRI load scoring standard of CSVD proposed by Staals, MRI imaging changes of CSVD, namely lacunar foci(LIs), cerebral microhemorrhage(CMBs), perivascular space(PVSs), and white matter high signal(WMHs), were analyzed and scored respectively.Load score ≥1 was defined as CSVD group.According to the above criteria, the enrolled patients were divided into depression group and anxiety group, and the clinical characteristics, biochemical test data and MRI imaging characteristics of CSVD between the two groups were analyzed by single factor analysis, and then Spearman correlation analysis was used to analyze the related factors of the elderly T2DM with anxiety and depression.Binary logistic analysis was used to analyze the risk factors of depression and anxiety in the elderly patients with T2DM.Results:Compared with the non-depressed group, the elderly T2DM patients with depression were older, more female, and the incidence of WMHs and DWMHs was higher( P<0.05).Compared with the non-anxious group, the incidence of WMHs and DWMHs in the elderly T2DM patients with anxiety group was higher( P<0.05).Spearman correlation analysis showed that age( r=0.224, P=0.024), WMHs( r=0.231, P=0.020), PWMHs( r=0.201, P=0.044), DWMHs( r=0.274, P=0.006)was positively correlated with depression in the elderly T2DM, while gender( r=-0.225, P=0.024)、ALT( r=-0.208, P=0.037)、AST( r=-0.204, P=0.041)was negatively correlated with depression in the elderly T2DM.WMHs( r=0.213, P=0.033)and DWMHs( r=0.270, P=0.006)were positively correlated with anxiety in the elderly T2DM.Binary logistic regression analysis showed that gender( OR=0.359, 95% CI: 0.130-0.990, P=0.048), DWMHs(OR=4.373, 95% CI: 1.290-14.828, P=0.018)were the influencing factors for the elderly T2DM patients with depression, and DWMHs( OR=5.000, 95% CI: 1.444-17.317, P=0.011)was the influencing factors for the elderly T2DM patients with anxiety. Conclusions:DWMHs is closely related to the onset of depression and anxiety in the elderly T2DM patients, suggesting that CSVD may be involved in the development of depression and anxiety in the elderly T2DM patients.

Objective:To investigate the clinical manifestation, pathological types, treatment and prognosis of primary tracheobronchial tumors in children.Methods:We retrospectively studied the primary tracheobronchial tumors patients who diagnosed from May 2009 to Jan 2021 in Guangzhou Women and Children Medical Center. The clinical manifestations, pathological types, therapeutic methods and prognosis were analyzed.Results:There were 15 patients identified as the primary tracheobronchial tumors, including synovial sarcoma (1 case), pulmonary inflammatory myofibroblastic tumor(IMT 4 cases), mucoepidermoid carcinoma(7 cases), infantile hemangioma (1 case), Ewing's sarcoma (1 case). Respiratory symptoms are the most complaint at the time of diagnosis including 15 patients with cough, 2 with hemoptysis, and 1 with dyspnea. Endoscopic treatment of tracheobronchial tumors was performed under extracorporeal membrane oxygenation (ECMO) support in 1 patient. Sleeve lobectomy was performed in 3 patients, lobectomies in 6, and local tumor resections in 4 patients including 2 patients suffered second surgery due to tumor recurrence.Conclusion:The clinical manifestations of the primary tracheobronchial tumors in children are nonspecific. Complete resection led to excellent outcome.

OBJECTIVETo investigate the clinical and biological characteristics of childhood acute myeloid leukemia(AML)with 8;21 translocation.

METHODSA retrospective analysis including clinical information, cell morphology, chromosome, immunophenotype and molecular biology was performed on 41 cases of childhood t(8;21)AML. The control group included 19 cases of AML without t(8;21) translocation detected during the same period.

RESULTSThe 41 cases of t(8;21)AML accounted for 68.3% of 60 continuous childhood AML patients. Among them, classical t(8;21) translocation was seen in 29 cases; variant t(8;21) translocation, simple 8q-, near-tetraploidy characterized by the duplication of t(8;21) translocation each came into view in 2 cases; and cryptic t(8;21) translocation was seen in 6 cases. Thirty seven cases (80.4%) belonged to M2 subtype of AML. Most of them had the morphological changes such as the leukemia cells' indent nucleus with a light stain region of perinucleus, basophilic cytoplasm, differentiation with maturation, megaloblastoid changes and nuclear-cytoplasm imbalance; the high expression of CD13 antigen; and the AML1/ETO fusion transcript in 23 cases examined by reverse transcription-polymerase chain reaction (RT-PCR) assay, including 6 cases with normal karyotype. The difference in complete remission rate between t(8;21) positive patients group and t(8;21) negative patients group was not significant in statistics (82.4% vs 75%, P>0.05). However the difference in recurring rate of the leukemia was statistically significant (10.7% vs 41.7%, P<0.05).

CONCLUSIONt(8;21)AML is the most frequent type of childhood AML. It is predominantly associated with M2 subtype of AML and has unique morphological, immunological prognostic features .

Acute Disease ; Adolescent ; Child ; Child, Preschool ; Chromosomes, Human, Pair 21 ; genetics ; Chromosomes, Human, Pair 8 ; genetics ; Female ; Humans ; Karyotyping ; Leukemia, Myeloid ; genetics ; pathology ; Male ; Retrospective Studies ; Reverse Transcriptase Polymerase Chain Reaction ; Translocation, Genetic

Objective:To investigate the efficacy and safety of dual wavelength pulsed dye laser combined with 30% supramolecular salicylic acid in the treatment of moderate and severe facial acne.Methods:Sixty patients with moderate and severe acne that visited the Dermatology Department of the First Affiliated Hospital of Chongqing Medical University from May 2020 to January 2021, were selected and randomly divided into observation group and control group, with 30 patients in each group. The observation group was given dual-wavelength pulsed dye laser combined with 30% supramolecular salicylic acid. 30% supramolecular salicylic acid was used once every two weeks, for a total of six times. Dual-wavelength pulsed dye laser was given once a month, for a total of three times. The control group was only given dual-wavelength pulsed dye laser, once a month, a total of three times.Results:Twenty-two cases (73.33%) in the observation group were effective, while 14 cases (46.67%) in the control group were effective. The efficacy of the observation group was better than that of the control group, and the difference was statistically significant (χ 2=4.44, P<0.05). There were no obvious adverse reactions in both groups. Conclusions:Dual-wavelength pulsed dye laser combined with 30% supramolecular salicylic acid is effective and safe in the treatment of moderate and severe facial acne, which is worth popularizing.

BACKGROUND:Currently,the verification of the precision of personalized bone models is usually performed by methods such as paired t-tests or intraclass correlation coefficient,but such methods often require the production of large batches of models,which do not satisfy the need for immediate use of personalized models. OBJECTIVE:To study the feasibility of establishing the equivalent model to verify the precision of the personalized bone model rapidly. METHODS:Bone CT images of three adults were randomly obtained for reconstruction.3D printing was used to create personalized bone models,and then the personalized bone models were scanned using CT and reconstructed.Mimics was used to compare the reconstructed models of bone CT images with the bone CT images.Geomagic Studio was used to analyze the fitting deviation between the reconstruction model of personalized bone model CT image and the reconstruction model of skeletal CT image.The 3D-printed personalized bone model was measured against the measurement positions and dimensions marked on the reconstruction model of skeletal CT image,and the error was calculated. RESULTS AND CONCLUSION:(1)By comparing the reconstructed bone CT image model with the bone CT scan image,the two were compatible in terms of anatomical structure and morphology,and the contours almost overlapped.(2)By fitting bias analysis,the standard bias was 0.176,0.226,and 0.143 mm in order,and all the results were<0.25 mm.(3)By measuring and calculating the model,the mean relative errors were 0.44%,0.21%,and 0.13%,and all the results were within 5%error.(4)The constructed equivalent model was in line with the basic conditions for making personalized bone models.The established equivalent model met the clinical needs and design requirements,and it was feasible to use the method of the equivalent model to verify the precision of the personalized bone model quickly.(5)This method could provide a targeted and rapid way to verify the precision of personalized bone models.It could achieve the goal of providing immediate clinical use without the need to produce large batches of models compared to conventional methods such as paired t-tests or intraclass correlation coefficient.

Objective To investigate the effects and complications of mitral valve membrane replacement surgery with preservation of mitral valve subvalvular structure on cardiac and valve function.Methods A total of 84 patients receiving mitral valve membrane replacement surgery with preserved mitral valve subvalvular structure in the First Affiliated Hospital of Soochow University from August 2019 to July 2022 were selected as the observa-tion group,and 68 patients receiving mitral valve membrane replacement surgery without preservingmitral valve subvalvular structure were selected as the control group.The surgical indicators,comorbidities,preoperative and postoperative cardiac function,and mitral valve hemodynamic parameters were compared between the two groups.Results There was no statistically significant difference between the observation group and the control group in terms of surgical history,extracorporeal circulation time,aortic occlusion time,postoperative mechanical ventilation time,ICU retention time,and postoperative hospitalization time(P>0.05).At 1,3,and 6 months after surgery,the left ventricular end systolic diameter(LVESD)and left ventricular end diastolic diameter(LVEDD)in the observation group were significantly lower than those in the control group(P<0.05),while the left ventricular short axis shortening rate(LVFS)was significantly higher than that in the control group(P<0.05).There was no statistically significant difference in left ventricular ejection fraction(LVEF)between the observation group and the control group at 1,3,and 6 months after surgery(P>0.05).There was no statistically significant difference(P>0.05)in the peak mitral valve velocity(Vmax),maximum pressure gradient difference(PGmax),and mean pressure gradi-ent difference(PGmean)between the observation group and the control group at 1,3,and 6 months after surgery.There was no statistically significant difference in creatine kinase isoenzyme(CK-MB)and N-terminal precursor brain natriuretic peptide(NT-proBNP)between the observation group and the control group at 1,3,and 6 months after surgery(P>0.05).There was no statistically significant difference in the incidence of postoperative complica-tions between the observation group and the control group(P>0.05).Conclusion The preservation of the mitral valve subvalvular structure and mitral membrane replacement surgery improved patient cardiac function,while there was no significant difference in mitral valve orifice blood flow parameters and complications compared with surgery without preservation of the mitral valve subvalvular structure.