4D bioprinting technology and its application in cardiovascular tissue engineering / 生物工程学报

3D bioprinting technology is a rapidly developing technique that employs bioinks containing biological materials and living cells to construct biomedical products. However, 3D-printed tissues are static, while human tissues are in real-time dynamic states that can change in morphology and performance. To improve the compatibility between in vitro and in vivo environments, an in vitro tissue engineering technique that simulates this dynamic process is required. The concept of 4D printing, which combines "3D printing + time" provides a new approach to achieving this complex technique. 4D printing involves applying one or more smart materials that respond to stimuli, enabling them to change their shape, performance, and function under the corresponding stimulus to meet various needs. This article focuses on the latest research progress and potential application areas of 4D printing technology in the cardiovascular system, providing a theoretical and practical reference for the development of this technology.

BRCA1 Reversion Mutation Confers Resistance to Olaparib and Camrelizumab in a Patient with Breast Cancer Liver Metastasis / 한국유방암학회지

Reversion mutations are associated with clinical resistance to poly(ADP-ribose) polymerase inhibitors (PARPi). Here, we describe the detection of a BRCA1 reversion mutation in a 39-year-old woman with metastatic breast cancer harboring a heterozygous germline BRCA1 exons 7–8 deletion who received PARPi olaparib combined with immune checkpoint inhibitor camrelizumab as third-line therapy. During progression from the olaparib and camrelizumab combination therapy, we identified via genomic sequencing a novel 7-base pair somatic deletion in BRCA1 (c.617_623delACAAATC). Sequence analyses indicated that this mutation realigned the reading frame of BRCA1, which potentially led to the reversal of its normal function and conferred resistance to PARPi.

Narrow band imaging for the evaluation of short-term effect of radiotherapy on esophageal carcinoma / 医学研究生学报

Objective The purpose of this study was to investigate the value of narrow band imaging (NBI) in evaluating the short-term effect of radiotherapy on esophageal carcinoma.Methods This study included 86 patients with esophageal squamous carcinoma treated in the Department of Oncology of Jiangyin People's Hospital from December 2013 to December 2016. All the patients underwent NBI, barium meal examination (BME) and CT scanning before and after radiotherapy. We compared the lesion contour sharpness shown by conventional endoscopy with that by NBI, analyzed the consistency between the two standards in evaluating the short-term effect of radiotherapy, and assessed the influence of NBI-based lesion grades on the prognosis of esophageal carcinoma, followed by a multivariate regression analysis of the prognostic factors with a Cox model.Results The total score on the lesion contour sharpness by NBI was significantly higher than that by conventional endoscopy (249 vs 195, P<0.05), and a significant consistency was found between the two standards in evaluating the short-term effect of radiotherapy (Kappa=0.772, P=0.000). Both the 3-year overall survival and 3-year progress-free survival rates were remarkably higher in the patients with NBI-based grades Ⅲ+Ⅳ than in those with grades Ⅰ+Ⅱ lesion (71.9% vs 37.5%, P<0.05; 58.1% vs 24.9%, P<0.05). Clinical stages (HR=1.63, 95% CI: 1.14-2.66) and NBI-based lesion grades (HR=1.42, 95% CI: 1.13-1.72) were independent prognostic factors for both the 3-year overall survival (P<0.05) and 3-year progress-free survival (P<0.05) of the esophageal carcinoma patients.Conclusion NBI presents a higher lesion contour sharpness of esophageal carcinoma than conventional endoscopy, NBI-based lesion grading has a significant value in the prognosis of esophageal carcinoma, and NBI combined with BME and CT can effectively evaluate the short-term effect of radiotherapy on the malignancy.

Emodin prevents intima thickness via Wnt4/Dvl-1/beta-catenin signaling pathway mediated by miR-126 in balloon-injured carotid artery rats

Neointimal proliferation after vascular injury is a key mechanism of restenosis, a major cause of percutaneous transluminal angioplasty failure and artery bypass occlusion. Emodin, an anthraquinone with multiple physiological activities, has been reported to inhibit proliferation of vascular smooth muscle cells (VSMCs) that might cause intimal arterial thickening. Thus, in this study, we established a rat model of balloon-injured carotid artery and investigated the therapeutic effect of emodin and its underlying mechanism. Intimal thickness was analyzed by hematoxylin and eosin staining. Expression of Wnt4, dvl-1, beta-catenin and collagen was determined by immunohistochemistry and/or western blotting. The proliferation of VSMC was evaluated by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay and electron microscopy. MicroRNA levels were quantified by real-time quantitative PCR. Emodin relieved injury-induced artery intimal thickness. Results of western blots and immunohistochemistry showed that emodin suppressed expression of signaling molecules Wnt4/Dvl-1/beta-catenin as well as collagen protein in the injured artery. In addition, emodin enhanced expression of an artery injury-related microRNA, miR-126. In vitro, MTT assay showed that emodin suppressed angiotensin II (AngII)-induced proliferation of VSMCs. Emodin reversed AngII-induced activation of Wnt4/Dvl-1/beta-catenin signaling by increasing expression of miR-126 that was strongly supported by transfection of mimic or inhibitor for miR-126. Emodin prevents intimal thickening via Wnt4/Dvl-1/beta-catenin signaling pathway mediated by miR-126 in balloon-injured carotid artery of rats.

Effects of Betel shisanwei ingredients pill on AC-cAMP-PKA signal transduction pathways in hippocampus and prefrontal cortex of depressive rats / 中国中药杂志

<p><b>OBJECTIVE</b>To observe the effects of Mongolian pharmaceutical Betel shisanwei ingredients pill on AC-cAMP-PKA signal transduction pathways in hippocampus and prefrontal cortex of depressive rats.</p><p><b>METHOD</b>Sixty male Wistar rats were randomly divided into six groups according to the sugar consumption test (10 rats in each group), normal control group,model group,fluoxetine group (3.3 mg x kg(-1)) and low dose, medium dose and high dose group (0.25, 0.5, 1 g x kg(-1)) of Betel shisanwei ingredients pill. Except the normal control,the other groups were treated with the chronic unpredictable mild stress stimulation combined with lonely raising for 28 days. 10 mL x kg(-1) of drugs were given to each rat once daily,continuously for 28 days. The AC activity of the hippocampus and prefrontal cortex were determined by radiation immunity analysis (RIA), while cAMP and PKA quantity were determinated by Enzyme-linked immunosorbent (ELISA).</p><p><b>RESULT</b>The AC activity, cAMP and PKA quantity of hippocampus and prefrontal of mouse model of Chronic stress depression decreased significantly than those of control group (P < 0.05 or P < 0.01). However, the AC activity, cAMP and PKA quantity of rat hippocampus and prefrontal cortex in the fluoxetine group and the Mongolian pharmaceutical Betel shisanwei ingredients pill group indecreased significantly than those of model group (P < 0.01 or P < 0.05). Especially for the high dose group of Mongolian pharmaceutical Betel shisanwei ingredients pill.</p><p><b>CONCLUSION</b>The AC-cAMP-PKA signal transduction pathways in hippocampus and prefrontal cortex of depression model of rats is down-regulated, whereas Mongolian pharmaceutical Betel shisanwei ingredients pill could up-regulated it to resist depression.</p>

Effect of tetramethylpyrazine on the proliferation and collagen synthesis of vascular smooth muscle cells / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To study the action mechanism of tetramethylpyrazine (TMP) on the proliferation of vascular smooth muscle cells (VSMCs), thus providing experimental evidence for Chinese medicine to effectively prevent restenosis.</p><p><b>METHODS</b>Rats' thoracic aorta VSMCs in vitro cultured (cell line A7r5) were divided into five groups, i.e., the negative control group, the angiotensin II (Ang II, 10(-6) mol/L) group, the low dose TMP (20 micromol/L) plus Ang II group, the middle dose TMP (40 micromol/L) plus Ang II group, the high dose TMP (80 micromol/L) plus Ang II group. The proliferation ratio was detected by MTT. Gene and protein expressions of Wnt4, Dvl-1, beta-catenin, CyclinD1, and collagen I and III were detected with real-time fluorescent quantitative PCR and Western blot respectively.</p><p><b>RESULTS</b>Compared with the negative control group, the proliferation ratio of VSMCs obviously increased in the Ang II group (P < 0.05). Compared with the Ang II group, the proliferation ratio of VSMCs obviously decreased in the middle dose TMP plus Ang II group and the high dose TMP plus Ang II group (P < 0.05). Compared with the negative control group, gene and protein expressions of Wnt4, Dvl-1, beta-catenin, CyclinD1, Col I, and Col III were obviously up-regulated in the Ang II group (P < 0.05). Compared with the Ang II group, mRNA and protein expressions of Wnt4, Dvl-1, beta-catenin, CyclinD1, Col I, and Col III were obviously down-regulated in the middle dose TMP plus Ang II group and the high dose TMP plus Ang II group (P < 0.05). The aforesaid indices were dose-dependent in the low, middle, and high dose TMP plus Ang II groups.</p><p><b>CONCLUSION</b>TMP inhibited Ang II induced proliferation and collagen secretion of VSMCs through down-regulating Wnt signal pathway.</p>

Protection of gastric mucosa against aspirin-induced damage by teprenone / 中华消化杂志

Objective To investigate the protection effects of teprenone in aspirin-induced gastric mucosa injury.Methods From 2008 to 2010,a total of 296 patients who took aspirin for the first time at the Department of Cardiovascular,First Hospital Affiliated to Zhejiang Chinese Medicine University were randomly divided into two groups.There were 166 cases in aspirin group,which took aspirin 100mg daily; 130 cases in aspirin and teprenone group,the aspirin dose equivalent with aspirin group and took teprenone 50mg/time,3 times/day orally.Gastrointestinal symptoms and gastric mucosa injury of patients in these two group were inspected at 3 month,6 month and 1 year.Results A total of 143 cases were recruited in aspirin group and 118 cases in aspirin and teprenone group.After taking medicine for 3 months,the occurrence rate of gastrointestinal symptoms in aspirin group was 1.40 ％.Compared with aspirin and teprenone group,the difference was statistical significant (0,x2 =1.663,P＝ 0.197).Follow up after taking medicine for 6 months,the occurrence rate of gastrointestinal symptoms in aspirin group was 4.96％.Compared with aspirin and teprenone group,the difference was statistical significant (0,x2 ＝6.021,P＝0.014).Follow up after taking medicine for 1 year,the occurrence rate of gastrointestinal symptoms in aspirin group was 20.15 ％.Compared with aspirin and teprenone group,the difference was statistical significant (1.69％,x2 =20.984,P=0.001).Compared with aspirin group,the symptom and endoscopy score of aspirin and teprenone group decreased significantly at follow-up for 6 months and 1 year (P＜0.05; P＜0.01 ).Compared with at 6 month,the symptom and endoscopy score of aspirin group at 1 year increased significantly (P＜0.05 ; P＜0.01).Conclusion Teprenone has certain protection effects in aspirin-induced gastric mucosa injury.Long-term use of conventional doses of aspirin may cause vary degrees of gastric mucosal injury,and the gastric mucosal injury get more severe as the time of taking medicine increases.

Quantitative analysis of the color change of iodine staining for diagnosis of early esophageal cancer / 中华消化内镜杂志

Objective To investigate the diagnostic value of quantitative analysis of the color change of iodine staining for early esophageal cancer.Methods A total of 58 patients with suspected esophageal diseases were recruited to this study.The lesions were stained with lugols iodine,and biopsies were performed.Quantitative analysis of color change under endoscopy was also performed by analysis software and the results were compared with pathological findings.Results A total of 62 iodine-unstained lesions in 58 patients were found,includiug 19 chronic inflammation,13 low-grade intraepithelial neoplasia,11 high-grade intraepithelial neoplasia and 19 squamous cell cancer.The color parameters of R/R'(red) and H/H'(hue) were significantly different among the four groups (P＜0.05).Conclusion Computerized chromoendoscopy is helpful in determining pathological characteristics of esophageal lesions,thereby improving the accuracy of endoscopic biopsy and the diagnosis rate of early esophageal cancer.

Relationship between risk stratification of cardiovascular diseases and outcome of 64-slice helical computed tomography coronary angiography / 中华老年医学杂志

Objective To investigate the relationship between the risk stratification of cardiovascular diseases and the outcome of 64-slice helical computed tomography (MSCT) coronary angiography. Methods A total of 470 cases suspected to have coronary heart disease were enrolled.They all received 64-slice MSCT coronary angiography, and they were divided into groups according to the range of disease, degree of calcium scoring, degree of stenosis and characteristic of plaque. Among them, 80 patients underwent both MSCT and selective coronary angiography (CAG) at one time, and they were grouped according to the range of disease and degree of stenosis. All the 470 cases were classified as five levels according to the risk stratification of cardiovascular diseases. The lesions of coronary artery in different risk stratifications were observed, and the correlations were analyzed.Results In the 80 patients who underwent both MSCT and selective CAG, there were no significant differences in the range of coronary artery diseases(χ2=3.631, P=0.067) and coronary arterystenosis (χ2=1.639, P=0.200) between MSCT and CAG. Along with the increased level of the risk stratification, there were the more ranges of the coronary artery diseases (λvery high risk. multi-vessel disease=1.09,λhigh risk. double-vessel disease=0.91, λlow-risk. single-vessel disease=1.07)and the more degrees of coronary artery stenosis(λvery high risk. severe stenosis=0.96,λhigh risk. moderate stenosis=1.03,λlow-risk. mild stenosis=0.78). The degrees of calcium scoring in different risk stratifications of cardiovascular diseases showed significantly differences (F=256.20,123.76,62.50, 98. 24,52.36,P＜0.01). There was the highest percentage of soft plaque in very high risk patients.Higher percentages of fiber plaque, calcified plaque and mixed plaque were found in moderate risk and low risk patients(λvery high risk. soft plaque=1.01,λlow-risk. calcium plaques=1.17). Conclusions The 64-slice MSCT coronary angiography could provide a basis for assessing risk stratification of cardiovascular diseases. The complicated coronary artery disease, moderate-severe calcification, more severe stenosis, higher percentage of soft plaque are found in the very high risk patients. The lower level of the risk stratification is found in patients with the less range of the coronary artery disease and less severe degree of the coronary artery calcification and stenosis. The calcified plaque and mixed plaque are found in moderate risk and low risk patients.

A meta-analysis for the incidence of postoperative myocardial infarction after off-pump and on-pump coronary artery bypass surgery / 中华胸心血管外科杂志

Objective The efficacy and safety of off-pump coronary artery bypass grafting (OPCAB) as comparing with conventional coronary artery bypass grafting(CCABG) remain inconclusive in randomized, controlled trials and retrospective studies. We tried to assess the incidence of myocardial infarction (MI) after OPCAB and CCABG. with a meta analysis based on published data in randomized ,controlled trials. Methods Relevant randomized controlled trials, published in English and Chinese before January 2009, were searched in Medline, the Science Citation Index Expanded, the Cochrane Central Register of Controlled Trials (CENTRAL) and CBMdisc. Manual searching of bibliographies were performed, with key words "oronary artery bypass graft", "off-pump" and "myocardial infarction". Two reviewers selected eligible trials independently, performed quality assessment and collected relevant data. Meta-analysis was performed with software RevMan 5. Results 22 trials were considered to be eligible for the meta analysis. The incidence of MI was 2.81% (42/1494) in the OPCAB group as compared with 3.57% (54/1512) in the CCABG group. No significant difference was present between the two groups (OR =0.80,95% CI =0.54 - 1.20, P =0.28). Conclusion Our meta analysis of current available randomized controlled trials involving OPCAB and CCABG in patients with coronary artery diseases suggests that the difference in the incidence of postoperative MI between CCABG and OPCAB groups is not significant.

Uniportal versus biportal video-assisted thoracoscopic sympathectomy for palmar hyperhidrosis / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Video-assisted thoracoscopic sympathectomy had replaced open surgery. The aim of this study was to compare the outcomes of using a single port and two ports to perform video-assisted thoracoscopic sympathectomy for palmar hyperhidrosis.</p><p><b>METHODS</b>Between April 2006 and February 2008, 20 cases underwent video-assisted thoracoscopic sympathectomy through one port (uniportal group) and 25 cases through two ports (biportal group). The variables including the operating time, hospital stay, pain scores, postoperative complications, incidence of symptom recurrence and patient satisfaction were compared. The mean postoperative follow-up period was 11.5 months (range, 3 - 25 months).</p><p><b>RESULTS</b>The hands of all patients were warm and dry after operation. No conversion to open surgery was necessary, and no operative mortality was recorded in either group. The mean inpatient pain scores were significantly higher in the biportal group (1.2 +/- 0.6) than that in the uniportal group (0.8 +/- 0.5, P = 0.025). For the first three weeks after operation, four out of 20 (20%) patients in the uniportal group constantly suffered from mild or moderate residual pain while eight out of 25 (32%) cases in the biportal group (P = 0.366). Among them, two cases in the uniportal group and five cases in the biportal group need to take analgesics. Our mean operative time (bilateral sympathectomy) in the uniportal group ((39.5 +/- 10.0) minutes) was shorter than that in biportal group ((49.7 +/- 10.6) minutes, P = 0.02). There were no significant differences between two groups in terms of the mean hospital stay, compensatory sweating, and patient satisfaction. Two patients in the biportal group and three in the uniportal group experienced a unilateral pneumothorax. None of them required chest drainage. No patient experienced Horner's syndrome, and no recurrent symptoms were observed in either groups.</p><p><b>CONCLUSIONS</b>Both uniportal and biportal video-assisted thoracoscopic sympathectomy are effective, safe, and minimally invasive for palmar hyperhidrosis. Comparing with the biportal approach, the uniportal approach causes less postoperative pain and less operative time, and is a more reasonable procedure in treatment of palmar hyperhidrosis.</p>

Effects of warm needle moxibustion on bone mass density and biochemical indexes of bone metabolism in patients of postmenopausal osteoporosis / 中国针灸

<p><b>OBJECTIVE</b>To compare therapeutic effects of warm needle moxibustion and medication on osteoporosis and to study the mechanism.</p><p><b>METHODS</b>Forty cases were randomly divided into an acupuncture group and a medication group, 20 cases in each group. The acupuncture group was treated by warm needle moxibustion at Dazhu (BL 11), Ganshu (BL 18), Shenshu (BL 23), Zusanli (ST 36), Yanglingquan (GB 34) etc. once other day, for 3 months; and the medication group was treated by oral administration of tablet Caltrate with Vit D2 for 3 months. The changes of bone mass density (BMD), estradiol (E2), osteocalcin (bone growth protein, BGP), urine calcium/creatinine (Ca/Cr) in the two groups before and after treatment and therapeutic effects were investigated.</p><p><b>RESULTS</b>After treatment, BMD significantly increased (P<0.05, P<0.01) in the acupuncture group and did not signifi cantly changed in the medication group (P>0.05) with a significant difference between the two groups (P<0.05). After treatment E2 level significantly increased as compared with before treatment in both of groups (P<0.01); after treatment BGP significantly decreased as compared with before treatment in both of groups (P<0.01); after treatment Ca/Cr significantly decreased as compared with before treatment in the acupuncture group (P<0.05) ; af ter treatment, there were significant differences in BGP and Ca/Cr between the two groups (P<0.05 or P<0.01). The clinically controlled rate in the acupuncture group and in the medication group were 35.0%, 5.0%, respectively, the therapeutic effect of the acupuncture group being better than that of the medication group (P<0.01).</p><p><b>CONCLUSION</b>The therapeutic effect of warm needle moxibustion on osteoporosis is better than that of oral administration of tablet Caltrate with Vit D2 and it can increase levels of hormones and delay bone loss. It is an effective method for preventing and treating postmenopausal osteoporosis.</p>

Relation of phlegm-stasis syndrome with insulin resistance and monocyte PPARgamma mRNA expression in patients with coronary heart disease / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To explore the relation of phlegm-stasis syndrome with insulin resistance and monocyte peroxisome proliferator activated receptor-gamma messenger ribonucleic acid (PPARgamma mRNA) expression in patients with coronary heart disease (CHD).</p><p><b>METHODS</b>Sixty patients with CHD were differentiated into three syndrome types, the non-phlegm non-stasis (NN) type, the phlegm congealing heart vessel (PC) type and the phlegm-stasis cemented (PS) type. Besides, 20 healthy volunteers were selected as the normal control. Levels of fasting plasma glucose (FPG) and fasting insulin (FINS) were determined and homeostasis model assessment of insulin resistance (HOMA-IR) was calculated accordingly. The expression of PPARgamma mRNA in the peripheral monocytes was assessed by reverse transcriptase-polymerase chain reaction (RT-PCR).</p><p><b>RESULTS</b>Levels of FINS, HOMA-IR and PPAR-gamma mRNA expression in all CHD patients were higher than in the normal control (P <0.01, P < 0.05); comparisons of the three indexes between patients of different syndrome types showed that they were higher in PC type and PS type than in NN type (P < 0.05 or P <0.01), and the difference between PC type and PS type was significant (P < 0.05).</p><p><b>CONCLUSION</b>Changes of insulin resistance and PPARgamma mRNA expression in monocytes are possibly one of the mechanisms for the development of phlegm-stasis syndrome in CHD.</p>

Clinical observation of erythropoietin in treating the anemia induced by chemotherapy / 肿瘤研究与临床

Objective Observe the response and adverse effects of impact dose recombination human erythropoietin(rhEPO)in the breast cancer patients with anemia induced by chemotherapy.Methods 43 breast cancer patients with anemia induced by chemotherapy were randomly divided into two groups,treatment group(23 patients)and the control(20 patients).The treatment group received rhEPO for 10 days and oral iron therapy,while the control group was oral iron therapy only.Results After 4 weeks,the hemoglobin level, hematocrit,reticulocyte and quality of life be revaluated,the treatment group was significantly better than the control.The adverse effects was tolerable.Conclusion The impact dose rhEPO is effective and tolerable in the breast cancer patients with anemia induced by chemotherapy.

Effect of Qingxin capsule on differentiation of Th cell in the course of viral myocarditis / 中国免疫学杂志

Objective:To investigate the changes of Th cell differentiation in the VMC and interference effect of Qingxin capsule on them.Methods:BALB/c mouses with different courses of VMC were established, after treated with Qingxin capsule, the cardiac pathological changes were observed by light microscope and transmisson electron microscope,levels of IL-2,IL-4,IL-10 and IFN-? in blood serum were detected by ELISA.Results: Whatever in acute stage or recovery stage of VMC, the myocard pathological changes of mouses were lighter after treated with Qingxin capsule;moreover, levels of IFN-? and IL-2 in blood serum of mouses with VMC decreased significantly(P0.05).Conclusion:Qingxin capsule can restore the balance of Th1 and Th2 cells through inhibiting reaction of Th1 and enhancing reaction of Th2.