1.High-fat diet affects plasma membrane GLUT4 content in skeletal muscle from Sprague-Dawley rats
Chinese Journal of Pathophysiology 2000;0(10):-
AIM: To explore the change of the amount of GLUT4 protein at the plasma membrane of the rat skeletal muscle after high-fat feeding. METHODS: The animals were divided into three groups (ten for each): group I: control; group II: high-fat feeding; group III: high-fat feeding + dietary treatment. The rat model of insulin resistance (IR) was made by feeding high-fat diet for eight weeks. And then insulin-resistant rats were fed with chow diet for 4 weeks. Fasting plasma glucose and fasting serum insulin levels were measured before and after dietary treatment, respectively. Insulin treatment was achieved by intraperitoneal injection of insulin (10 unit insulin per kg body weight) 15 minutes before killing the animals. The right hindlimb skeletal muscle was rapidly dissected. Then the expression of GLUT4 protein at the plasma membrane in all the animals was assessed with Western bloting. RESULTS: The GLUT4 content at the plasma membrane in high-fat-fed rat skeletal muscle was significantly lower (about 31%) than that in controls (P
2.Clinical application of the combined the anterior malleolus flap and anterior tibia flap
Chuan ZHANG ; Yadong YU ; Chunyu YANG ; Fang LEI ; Weidong BI
Chinese Journal of Microsurgery 2010;33(4):271-273,后插二
Objective To investigate the clinical application of the combined the anterior malleolus flap and anterior tibia flap. Methods Based on the dissection of the perforating branches of anterior tibial artery on the middle and inferior section, the combined the anterior malleolus flap and anterior tibia flap was designed to repair the necrotic skin of anterior foot for 5 patients. The sizes of the flaps ranged from 17 cm×10 cm-10 cm× 5 cm. And the area of the flap was from tibial tuberosity(upper bound) to the line between internal malleolus and external malleolus (lower bound), and from the median line of one side of leg to the other side. Results Postoperatively, all flaps survived, and the primary healing of transplanted skin in donor site was achieved. The texture of flaps were excellent, the phenomenon of abrasion did not happen, and the clinical therapeutic efficacy was satisfactory after a follow up of 2-24 months. Conclusion It's a good method that combined the anterior malleohls flap and anterior tibia flap, which not only could enlarge the area of the flap but also has reliable blood supply, in repair of large size skin defect of anterior foot.
3.Analysis on Composition Principles of Prescriptions for Sequela of Apoplexy by Traditional Chinese Medicine Inheritance Platform
Xiaofeng LIU ; Guangyu LIU ; Hairui WANG ; Chunyu BI ; Huayun YU
World Science and Technology-Modernization of Traditional Chinese Medicine 2015;(10):2156-2161
This study was aimed to analyze the composition principles of prescriptions for sequela of apoplexy collected in the CNKI by the Traditional Chinese Medicine Inheritance Platform (TCMIP), in order to provide a reference for clinical selection of medication. Prescriptions for the sequela of apoplexy treatment in CNKI were collected. Based on the TCMIP, the medication rules of prescription were analyzed by data mining method after data entry. A total of 190 prescriptions involving 204 herbs for sequela of apoplexy treatment were screened and studied. The herbs for blood-activating andqi-tonifying were used with higher frequency. There were 36 commonly used herbal pairs. The herb pair of Dang-Gui(Radix Angelicae Sinensis) andHuang-Qi (Radix Astragali) was with the highest frequency. The herbal combination with three types of herbs wasDi-Long (Pheretima),Dang-Gui andHuang-Qi. The herbal combination with four types of herbs wasChuan-Xiong (Rhizoma Chuanxiong),Di-Long,Dang-Gui andHuang-Qi. The analysis on association rule showed thatChuan-Xiong,Dang-Gui,Tao-Ren (Semen Persicae),Hong-Hua(Flos carthami) andHuang-Qiwere often combined with each other. A total of 48 core combinations and 11 new prescriptions were mined. It was concluded that the prescriptions for sequela of apoplexy were mainly composed with herbs for blood-activating,qi-tonifying and collateral-dredging. According to the flavor and meridian tropism theory of Chinese medicine, the herbal medication selection in the prescription was mostly warm and hot in nature, sweet and pungent flavor, and the meridian tropism of the liver and spleen meridian.
4.Advances of molecular mechanisms of oxidative stress in obstructive sleep apnea syndrome and stroke
Honghao MAN ; Shuqiang YAO ; Yongpeng YU ; Yuhua BI ; Chunyu DONG ; Xiaohong QIAO ; Weiping JU
Chinese Journal of Primary Medicine and Pharmacy 2017;24(3):462-465
Obstructive sleep apnea (OSA)is a high incidence of potentially dangerous disease,characterized by intermittent hypoxia or hypercapnia.It is an independent risk factor for ischemic stroke.Currently a number of studies have confirmed OSA closely associated with oxidative stress.In this paper,the complex mechanisms of oxidative stress in the OSA and the occurrence of stroke will be reviewed,such as promoting atherosclerosis,damaging the mitochondria,ischemia -reperfusion injury,ischemic preconditioning.To investigate the relationship between OSA,oxidative stress and stroke from molecular mechanisms.
5.Effects of early-life exposure to angiotensinⅡ type 1 receptor autoantibody on lipid metabolism in offspring rats
Yan TAO ; Ye WU ; Suli ZHANG ; Pengli WANG ; Jing BI ; Chunyu HE ; Huirong LIU
Chinese Journal of Perinatal Medicine 2022;25(3):192-200
Objective:To investigate the effects of early-life (intrauterine and breastfeeding period) exposure to angiotensin Ⅱ type 1 receptor autoantibody (AT 1-AA) on lipid metabolism in offspring rats. Methods:Thirty-two AT 1-AA negative healthy nonpregnant specific pathogen free female Sprague Dawley rats weighing 150-170 g were randomly divided into two groups. Those in the immune group ( n=16) were subcutaneously injected with the mixture of an equal volume of Freund's adjuvant and the second extracellular loop of human-derived angiotensin Ⅱ receptor type 1 (AT1R-ECⅡ) repeatedly to establish the AT 1-AA-positive rat model by active immunization and those in the control group ( n=16) with normal saline solution. Before each immunization, blood samples were collected from the tail of rats to detect serum AT 1-AA levels of those rats in both groups, and the AT 1-AA-positive rat model was successfully established when the serum AT 1-AA was positive and its level reached a plateau. After eight weeks of immunization, the female rats in the two groups were mated with healthy AT 1-AA-negative male rats to conceive. Serum samples were collected from the maternal and offspring rats at the gestation of 18 days (G18), postnatal 21 days (P21), and from the normally fed offspring rats from the time of weaning to 12 weeks old (W12). Active immunization was not performed on the offspring throughout the experiment. The serum AT 1-AA levels of maternal and offspring rats were determined by enzyme-linked immunosorbent assay, and serum AT1-AA was positive when the ratio of AT1-AA level of the immune group over the control group ≥2.1. The blood lipid levels of maternal and offspring rats were measured by an automatic biochemical analyzer. Serum AT 1-AA levels, total cholesterol (TC), high-density lipoprotein-cholesterol [instead of high-density lipoprotein (HDL)], low-density lipoprotein-cholesterol, and free fatty acid levels of the offspring and maternal rats were determined for correlation analysis. Two independent sample t-test, linear regression analysis, and analysis of variance were adopted for statistical analysis. Results:(1) The serum levels of AT 1-AA in maternal rats at G18 and P21 in the immune group were significantly higher than those in the control group (G18: 1.170±0.190 vs 0.114±0.016, t=14.64; P21: 0.988±0.283 vs 0.084±0.006, t=9.57; both P<0.001). (2) The serum levels of AT 1-AA in the offspring at G18 and P21 in the immune group were significantly higher than those in the control group (offspring at G18: 0.948±0.220 vs 0.105±0.010, t=10.10; male offspring at P21: 0.758±0.273 vs 0.080±0.002, t=7.46; female offspring at P21: 0.774±0.274 vs 0.084±0.005, t=7.55; all P<0.001), which showed a positive correlation with those in maternal rats at the same period (offspring at G18: R=0.78; male offspring at P21: R=0.82; female offspring at P21: R=0.82; all P<0.05). However, there was no significant difference in the serum AT 1-AA level in offspring at W12 between the immune and control group ( P>0.05). (3) The serum levels of TC at G18 and P21, and HDL at P21 in maternal rats in the immune group were all higher than those in the control group [TC at G18: (2.36±0.32) vs (1.95±0.24) mmol/L, t=2.70; P21: (2.82±0.50) vs (2.18±0.26) mmol/L, t=3.41; HDL at P21: (1.94±0.33) vs (1.57±0.23) mmol/L, t=2.80; all P<0.05]. (4) Compared with the offspring in the control group, there was no significant change in lipid metabolism at G18 and W12 in the offspring in the immune group (both P>0.05). The serum levels of TC and HDL in male and female offspring at P21 in the immune group were higher than their counterparts in the control[TC in male offspring: (2.38±0.52) vs (1.83±0.30) mmol/L, t=2.73; HDL in male offspring: (1.44±0.32) vs (1.07±0.18) mmol/L, t=2.98; TC in female offspring: (2.50±0.72) vs (1.70±0.26) mmol/L, t=3.16; HDL in female offspring: (1.41±0.33) vs (1.00±0.14) mmol/L, t=3.41; all P<0.05]. (5) The serum levels of TC and HDL in male and female offspring at P21 in the immune group showed no correlation with those in maternal rats at P21 (all R<0.5, all P>0.05). The serum levels of HDL in male and female offspring at P21 in the immune group had a positive correlation with their own serum TC levels (male offspring: R=0.98; female offspring: R=0.97; both P<0.001) and also with their own serum AT 1-AA levels (male offspring: R=0.74, P=0.023; female offspring: R=0.91, P=0.001). The serum levels of TC in male and female offspring at P21 in the immune group had a positive correlation with their serum AT 1-AA levels (male offspring: R=0.72, P=0.030; female offspring: R=0.90, P=0.001). Conclusion:The early-life exposure to AT 1-AA may cause abnormal expression of TC and HDL in offspring rats.
6.Impact of dispatcher-assisted cardiopulmonary resuscitation on survival after out-of-hospital cardiac arrest: A Meta-analysis
Pengcheng ZHAO ; Qingyun GONG ; Di WANG ; Baoquan LI ; Rui XU ; Chunyu LI ; Chao BI ; Yanbin DONG ; Jinsong ZHANG ; Yan CHEN
Chinese Journal of Emergency Medicine 2022;31(4):487-496
Objective:To evaluate the outcome of the patients receiving dispatcher-assisted cardiopulmonary resuscitation (DA-CPR) delivered by first-responders who witnessed the out-of-hospital cardiac arrest (OHCA) before the Emergency Medical Service (EMS) arrived.Methods:We performed a search of the relevant literature exploring major scientific databases. We assessed the quality of the included cohort study according to the Cochrane Handbook for Systematic Reviews of Interventions Version 5.1.0. Meta-analysis was performed on three outcome indicators (recovery of spontaneous circulation survival to hospital discharge and survival with favourable neurologic outcome) using the Revman5.3 software.Results:A total of 21 studies with 349 822 patients were selected for the meta-analysis, including 182 125 patients in the DA-CPR group and 167 697 in the CPR-only group. The meta-analysis showed no significant difference between the DA-CPR and CPR-only groups in ROSC [ RR=1.10, 95% confidence interval ( CI): 0.94-1.29, P=0.24], survival to hospital discharge ( RR=1.10, 95% CI: 0.90-1.34, P=0.34) and survival with favourable neurologic outcome ( RR=1.01, 95% CI: 0.79-1.28, P=0.97) of the patients in America, Japan and Korea. However, there was a significant difference between the DA-CPR and the CPR-only groups in ROSC ( RR=2.61, 95% CI:1.53-4.46, P=0.0005), survival to hospital discharge( RR=6.08, 95% CI: 1.84-20.04, P=0.003), and survival with favourable neurologic outcome( RR=9.76, 95% CI: 1.87-51.02, P=0.007) of the patients in China. Conclusions:The overall effect of DA-CPR is significantly different for each country. In detail, DA-CPR offers a survival advantage (Return of spontaneous circulation, survival to hospital discharge and survival with favourable neurologic outcome) over CPR alone in China but no advantage in developed countries.
7.Research progress on the role of IDO signaling pathway in radiotherapy for non-small cell lung cancer
Linfang WU ; Chunyu WANG ; Yufan YANG ; Nan BI ; Lyuhua WANG
Chinese Journal of Radiation Oncology 2022;31(2):219-222
Indoleamine 2, 3-dioxygenase (IDO) is one of the rate-limiting enzymes that degrade tryptophan (Trp) into kynurenine (Kyn). Inflammatory factor IFN-γ mediates tumor′s immune escape by activating the IDO signaling pathway, upregulating theKyn/Trp (K/T ratio) and suppressing the activity of both CD 8+T and regulatory T cells. Radiotherapy plays a major role in treating non-small cell lung cancer. It not only bi-directionally regulates immune response of the host, but also collaborates with immunosuppressive agents to kill tumors. Meanwhile, immune status of the host can affect the therapeutic effect of radiotherapy. In recent years, studies have shown that IDO activity levels change before and after radiotherapy and is related to clinical prognosis. Nevertheless, relevant mechanism remains unclear. This article aims to elucidate the application of IDO signaling pathway in radiotherapy for non-small cell lung cancer.