Sesamin induces A549 cell mitophagy and mitochondrial apoptosis via a reactive oxygen species-mediated reduction in mitochondrial membrane potential

Sesamin, a lipid-soluble lignin originally isolated from sesame seeds, which induces cancer cell apoptosis and autophagy. In the present study, has been reported that sesamin induces apoptosis via several pathways in human lung cancer cells. However, whether mitophagy is involved in sesamin induced lung cancer cell apotosis remains unclear. This study, the anticancer activity of sesamin in lung cancer was studied by reactive oxygen species (ROS) and mitophagy. A549 cells were treated with sesamin, and cell viability, migration ability, and cell cycle were assessed using the CCK8 assay, scratch-wound test, and flow cytometry, respectively. ROS levels, mitochondrial membrane potential, and apoptosis were examined by flow cytometric detection of DCFH-DA fluorescence and by using JC-1 and TUNEL assays. The results indicated that sesamin treatment inhibited the cell viability and migration ability of A549 cells and induced G0/G1 phase arrest. Furthermore, sesamin induced an increase in ROS levels, a reduction in mitochondrial membrane potential, and apoptosis accompanied by an increase in cleaved caspase-3 and cleaved caspase-9. Additionally, sesamin triggered mitophagy and increased the expression of PINK1 and translocation of Parkin from the cytoplasm to the mitochondria. However, the antioxidant N-acetyl-L-cysteine clearly reduced the oxidative stress and mitophagy induced by sesamin. Furthermore, we found that cyclosporine A (an inhibitor of mitophagy) decreased the inhibitory effect of sesamin on A549 cell viability. Collectively, our data indicate that sesamin exerts lethal effects on lung cancer cells through the induction of ROS-mediated mitophagy and mitochondrial apoptosis.

Study on the Improvement Effects of Dajianzhong Decoction on Irritable Bowel Syndrome Visceral Pain Model Rats Based on EGC / 中国药房

OBJECTIVE：To study th e improvement effect and mechanism of Dajianzhong decoction on irritable bowel syndrome（IBS）visceral pain model rats. METHODS ：Totally 48 male non-weaning rats were randomly divided into normal control group ，model group ，pinaverium bromide group （positive control ，45 mg/kg）and Dajianzhong decoction high-dose ， medium-dose and low-dose groups （2.16，1.08，0.54 g/kg，by crude drug ），with 8 rats in each group. Except for normal control group，IBS visceral pain model was established by mother and child separation ，acetic acid enema ，ovalbumin intraperitoneal Remote limb precondition - ing protects against ischemia induced neuronal death through ameliorating neuronal oxidative DNA damage injection in other groups for 57 d. On the 58th day ，the rats in administration groups were given the corresponding drugs intragastrically，and model group and normal control group were given constant volume of purified water ，once a day ，for consecutive 14 d. The general condition of rats was observed ；abdominal wall withdrawal reaction （AWR）was adopted to evaluate the visceral sensitivity of rats in each group under 20，40，60，and 80 mmHg （1 mmHg＝0.133 kPa）pressure；HE staining method was used to observe the colon pathological features of rats in each group. Western blotting assay was used to detect the protein expression of intestinal glial cells markers fibrillary acidic protein （GFAP），nerve growth factor （NGF）and its receptor TrkA in colon tissue. RESULTS ：The mucosal layer of colon tissue in rats of model group was discontinuous ，gland edema was observed and lymphocytes ，neutrophils and eosinophils were scattered in the lamina propria. In Dajianzhong decoction low-does group，the mucosal layer of colon tissue was incomplete ，some glands were slightly edematous ，and a few lymphocytes ， neutrophils in the lamina propria. The colonic mucosa epithelial structure was intact ，glands arranged regularly ，and no degenerative necrosis and inflammatory cells were observed in Dajianzhong decoction medium- and high-dose groups and pinaverium bromide group. Compared with normal control group ，AWR scores under 20，40，and 60 mmHg pressure ，relative protein expression of GFAR ，NGF and TrkA were all increased significantly in model group and Dajianzhong decoction low-does groups（P＜0.05 or P＜0.01）. Compared with model group ，AWR scores under 20，and 40 mmHg pressure in Dajianzhong decoction medium- and high-dose groups and pinaverium bromide group ，AWR scores under 60 mmHg pressure in Dajianzhong decoction high-dose group and pinaverium bromide group ，relative protein expression of GFAP ，NGF，TrkA in colon tissue in Dajianzhong decoction medium- and high-dose groups and pinaverium bromide group were all decreased significantly （P＜0.05 or P＜0.01）. CONCLUSIONS ：Dajianzhong decoction could improve the visceral pain of IBS model rats by inhibiting the activation of intestinal glial cells and reducing the expression of NGF and TrkA.

Correlation between mild cognitive impairment and Alzheimer disease associated neuronal thread protein neurofilament protein level in urine in Parkinson disease / 中国医师进修杂志

Objective:To explore the correlation between urine Alzheimer disease associated neuronal thread protein (AD7C-NTP) and cognitive dysfunction in patients with Parkinson disease (PD).Methods:The clinical data of 90 patients with PD in Weihai Central Hospital in Shandong Province from April 2016 to August 2019 were retrospectively analyzed. According to the Montreal cognitive assessment scale (MoCA) score, the patients were divided into non cognitive impairment group (46 cases) and mild cognitive impairment group (44 cases). Forty-five healthy persons matched in gender and age were selected as control group. The urine AD7C-NTP, and serum homocysteine (Hcy), uric acid, C-reactive protein (CRP) were detected. The MoCA score, PD Hoehn-Yahr classification (H-Y classification), levodopa equivalent dose and time of taking medicine were record. The correlation between AD7C-NTP and various clinical indicators was analyzed by Pearson method. Risk factors of cognitive dysfunction in patients with PD were analyzed by Logistic regression.Results:The AD7C-NTP and Hcy in mild cognitive impairment group were significantly higher than those in control group and non cognitive impairment group: (3.3 ± 2.3) μg/L vs. (1.9 ± 1.6) and (2.1 ± 2.0) μg/L, (13.5 ± 3.4) μmol/L vs. (9.1 ± 4.5) and (11.0 ± 3.1) μmol/L, the indexes in non cognitive impairment group were significantly higher than those in control group, and there were statistical differences ( P<0.05). The uric acid in mild cognitive impairment group was significantly lower than that in control group and non cognitive dysfunction group: (286.7 ± 62.9) μmol/L vs. (338.6 ± 70.4) and (322.9 ± 81.2) μmol/L, the index in non cognitive impairment group was significantly lower than that in control group, and there were statistical differences ( P<0.05). The MoCA score in mild cognitive impairment group was significantly lower than that in non cognitive impairment group: (22.9 ± 2.9) scores vs. (27.3 ± 2.4) scores, the H-Y classification, levodopa equivalent dose and time of taking medicine were significantly higher than those in non cognitive impairment group: (2.7 ± 0.7) stages vs. (2.4 ± 0.6) stages, (465.8 ± 132.1) mg/d vs. (405.8 ± 139.5) mg/d and (46.9 ± 22.1) months vs. (35.8 ± 24.4) months, and there were statistical differences ( P < 0.01 or<0.05). Pearson correlation analysis result showed that AD7C-NTP was negatively correlated with uric acid and MoCA scores ( r = -0.365 and -0.586, P < 0.01), and positively correlated with H-Y classification, levodopa equivalent, Hcy and time of taking medicine ( r = 0.568, 0.434, 0.362 and 0.324; P < 0.01). Multivariate Logistic regression analysis result showed that AD7C-NTP, Hcy and H-Y classification were independent risk factors of cognitive dysfunction in patients with PD ( P < 0.01 or<0.05), and uric acid was an independent protective factor ( P < 0.05). Conclusions:The expression of urine AD7C-NTP is increased in PD patients with cognitive impairment. The level of urine AD7C-NTP is correlated with cognitive impairment and disease severity, which may be an effective biomarker of cognitive impairment in PD patients.

Sesamin induces A549 cell mitophagy and mitochondrial apoptosis via a reactive oxygen species-mediated reduction in mitochondrial membrane potential

Sesamin, a lipid-soluble lignin originally isolated from sesame seeds, which induces cancer cell apoptosis and autophagy. In the present study, has been reported that sesamin induces apoptosis via several pathways in human lung cancer cells. However, whether mitophagy is involved in sesamin induced lung cancer cell apotosis remains unclear. This study, the anticancer activity of sesamin in lung cancer was studied by reactive oxygen species (ROS) and mitophagy. A549 cells were treated with sesamin, and cell viability, migration ability, and cell cycle were assessed using the CCK8 assay, scratch-wound test, and flow cytometry, respectively. ROS levels, mitochondrial membrane potential, and apoptosis were examined by flow cytometric detection of DCFH-DA fluorescence and by using JC-1 and TUNEL assays. The results indicated that sesamin treatment inhibited the cell viability and migration ability of A549 cells and induced G0/G1 phase arrest. Furthermore, sesamin induced an increase in ROS levels, a reduction in mitochondrial membrane potential, and apoptosis accompanied by an increase in cleaved caspase-3 and cleaved caspase-9. Additionally, sesamin triggered mitophagy and increased the expression of PINK1 and translocation of Parkin from the cytoplasm to the mitochondria. However, the antioxidant N-acetyl-L-cysteine clearly reduced the oxidative stress and mitophagy induced by sesamin. Furthermore, we found that cyclosporine A (an inhibitor of mitophagy) decreased the inhibitory effect of sesamin on A549 cell viability. Collectively, our data indicate that sesamin exerts lethal effects on lung cancer cells through the induction of ROS-mediated mitophagy and mitochondrial apoptosis.

The Application of the Neural Tracer Technique to Acupuncture Studies / 上海针灸杂志

The neuroanatomical basis of meridian effects is one of the focuses of acupuncture mechanism studies. Meridian effects depend mainly on the generation, conduction, integration and output of acupuncture information in the acupoint, spinal cord and brain.The neural tracer technique is a basic method in neurobiology. This article presents recent years' advances in the application of the neural tracer technique to acupuncture field and summarizes the types of neural tracer used in acupuncture studies and regularities in the distribution of neurons and their fibers related to labeled meridians and acupoints in spinal segments and brain regions to provide methodological reference for studies on neurobiological mechanism of acupuncture effects.

New study progress of intracranial aneurysm rupture risk and geometry indicators / 中国医师进修杂志

In recent years, through the measurement and analysis of size ratio(SR), inflow angle (IFA), volume-to-ostium ratio(VOR), flow angle(FA), parent-daughter angle(PDA), A1- A2 diameter ratio(A1/A2), a ratio of aneurysm volume to bounding sphere volume(AVSV), a ratio of aneurysm surface to bounding sphere surface (AASA), some international scholars assessed aneurysm rupture risk, and had made some preliminary progress. Research showed that the geometry parameters had the objective significance for the evaluation of the risk of aneurysm rupture, and the bigger the SR, IFA, VOR, FA, A1/A2, AVSV, AASA, the easier the rupture of aneurysms. The smaller the PDA, the easier the rupture of the aneurysms.

Medical voucher system in Hong Kong and Macao and its implications to mainland China / 中国卫生政策研究

It is important and difficult to establish the market competition mechanism in the health care re-form. Medical voucher system in Hong Kong and Macao can provide policy guidelines for Mainland China to promote institutional innovation, force public hospital reform and the rational allocation of medical and health resources. This paper introduced the origin and development of medical voucher system. Based on the description of the implementa-tion background, similarities and differences and effects of medical voucher system in Hong Kong and Macao, the pa-per found that medical voucher system could help encourage the demander to make more frequent use of medical serv-ices, improve their consciousness of prevention and health care and promote family doctor system. Through analyzing the applicability of medical voucher system in mainland China, the paper pointed out it was consistent with the reform orientation and could be served as a useful supplement to the health care system to improve medical insurance, medi-cal assisstance system as well as an effective measure to develop private medical institutions.

Expression and significance of TLR4 and NF-κB on inflammatory injure after intracerebral hemorrhage in rats / 重庆医学

Objective To evaluate expression and significance of TLR4 and NF-κB on inflammatory injure after intracerebral hemorrhage in rats .Methods 60 Sprague Dawley maleness rats were randomly divided into Sham group ,12 h ,24 h ,72 h and 7 d af-ter ICH group(12 s) .The ICH was induced by injection of autologous blood in rats .The behavioral changes were detected by neu-rologic deficit score .The water content of the brain was used to evaluate brain edema changes .Number of TLR4 and NF-κB positive cells by Nissl staining and the expression of protein determined by immunohistochemistry and Western blot .Results After ICH 12 h ,expression of TLR4 and NF-κB positive cells around the hematoma were expressed ,with the extension of the time ,expression was gradually increasing ,and after ICH 72 h the expression of protein were the highest .Cerebral edema and severe neurological damage occurred .Western blot shows the amount of TLR4 expression and NF-κB were in line with the result .Conclusion After in-tracerebral hemorrhage in rat causing inflammatory injure of brain tissue around the hematoma .TLR4 may activate the expression of NF-κB involved in the secondary inflammatory injure after intracerebral hemorrhage in rats .