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https://www.readbyqxmd.com/read/29929196/cpg-odn-a-tlr9-agonist-aggravates-myocardial-ischemia-reperfusion-injury-by-activation-of-tlr9-p38-mapk-signaling
#1
Liang Xie, Songqing He, Na Kong, Ying Zhu, Yi Tang, Jianhua Li, Zhengbing Liu, Jing Liu, Jianbin Gong
BACKGROUND/AIMS: Toll-like receptors (TLRs) have been implicated in myocardial ischemia/ reperfusion (I/R) injury. We examined the effect of CpG-oligodeoxynucleotide (ODN) on myocardial I/R injury. METHODS: Male Sprague-Dawley rats were treated with either CpG-ODN or control ODN 1 h prior to myocardial ischemia (30 min) followed by reperfusion. Rats treated with phosphate-buffered saline (PBS) served as I/R controls (n = 8/group). Infarct size was determined by 2,3,5-triphenyltetrazolium chloride and Evans blue straining...
June 19, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29929189/dexmedetomidine-protects-neural-stem-cells-from-ketamine-induced-injury
#2
Pan Lu, Shan Lei, Weisong Li, Yang Lu, Juan Zheng, Ning Wang, Yongjun Xia, Haixia Lu, Xinlin Chen, Yong Liu, Peng-Bo Zhang
BACKGROUND/AIMS: Ketamine inhibits the proliferation of neural stem cells (NSCs) and disturbs normal neurogenesis. Dexmedetomidine provides neuroprotection against volatile anesthetic-induced neuroapoptosis and cognitive impairment in the developing brain. Whether it may protect NSCs from ketamine-induced injury remains unknown. In this study, we investigated the protective effects of dexmedetomidine on ketamine-exposed NSCs and explored the mechanisms potentially involved. METHODS: Primary NSC cultures were characterized using immunofluorescence...
June 19, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29929118/facile-synthesis-of-vanillin-based-novel-bischalcones-identifies-one-that-induces-apoptosis-and-displays-synergy-with-artemisinin-in-killing-chloroquine-resistant-plasmodium-falciparum
#3
Upendra K Sharma, Dinesh Mohanakrishnan, Nandini Sharma, Danish Equbal, Dinkar Sahal, Arun K Sinha
The inherent affinity of natural compounds for biological receptors has been comprehensively exploited with great success for the development of many drugs, including antimalarials. Here the natural flavoring compound vanillin has been used as an economical precursor for the synthesis of a series of novel bischalcones whose in vitro antiplasmodial activities have been evaluated against erythrocytic stages of Plasmodium falciparum. Bischalcones 9, 11 and 13 showed promising antiplasmodial activity {Chloroquine (CQ) sensitive Pf3D7 IC50 (μM): 2...
June 15, 2018: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29928578/suppressed-de-novo-lipogenesis-by-plasma-membrane-citrate-transporter-inhibitor-promotes-apoptosis-in-hepg2-cells
#4
Phornpun Phokrai, Wan-Angkan Poolsri, Somrudee Suwankulanan, Narinthorn Phakdeeto, Worasak Kaewkong, Dumrongsak Pekthong, Lysiane Richert, Piyarat Srisawang
Suppression of the expression or activities of enzymes that are involved in the synthesis of de novo lipogenesis (DNL) in cancer cells triggers cell death via apoptosis. The plasma membrane citrate transporter (PMCT) is the initial step that translocates citrate from blood circulation into the cytoplasm for de novo long-chain fatty acids synthesis. This study investigated the antitumor effect of the PMCT inhibitor (PMCTi) in inducing apoptosis by inhibiting the DNL pathway in HepG2 cells. The present findings showed that PMCTi reduced cell viability and enhanced apoptosis through decreased intracellular citrate levels, which consequently caused inhibition of fatty acid and triacylglycerol productions...
June 2018: FEBS Open Bio
https://www.readbyqxmd.com/read/29928429/impaired-efferocytosis-by-monocytes-in-multiple-myeloma
#5
Ying Yu Liang, Ilse Schwarzinger, Ingrid Simonitsch-Klupp, Hermine Agis, Rudolf Oehler
Efficient clearance of apoptotic cells by efferocytosis is important for tissue homeostasis. Impaired efferocytosis leads to the accumulation of cell debris, which is regarded as a trigger in chronic inflammation and autoimmune diseases. Patients with hematological neoplastic disorders such as multiple myeloma (MM) exhibit high blood levels of apoptotic microparticles. The present study investigated whether these high levels of apoptotic microparticles are associated with insufficient dead cell clearance. Blood samples were collected from patients with MM immediately prior to and 3, 7 and 10 days after the initial cycle of bortezomib-based therapy...
July 2018: Oncology Letters
https://www.readbyqxmd.com/read/29928342/quercetin-induced-apoptosis-of-human-oral-cancer-sas-cells-through-mitochondria-and-endoplasmic-reticulum-mediated-signaling-pathways
#6
Yi-Shih Ma, Chien-Ning Yao, Hsin-Chung Liu, Fu-Shun Yu, Jen-Jyh Lin, Kung-Wen Lu, Ching-Lung Liao, Fu-Shin Chueh, Jing-Gung Chung
Oral cancer is a cause of cancer-associated mortality worldwide and the treatment of oral cancer includes radiation, surgery and chemotherapy. Quercetin is a component from natural plant products and it has been demonstrated that quercetin is able to induce cytotoxic effects through induction of cell apoptosis in a number of human cancer cell lines. However, there is no available information to demonstrate that quercetin is able to induce apoptosis in human oral cancer cells. In the present study, the effect of quercetin on the cell death via the induction of apoptosis in human oral cancer SAS cells was investigated using flow cytometry, Annexin V/propidium iodide (PI) double staining, western blotting and confocal laser microscopy examination, to test for cytotoxic effects at 6-48 h after treatment with quercetin...
June 2018: Oncology Letters
https://www.readbyqxmd.com/read/29928326/miltirone-induced-apoptosis-in-cisplatin-resistant-lung-cancer-cells-through-upregulation-of-p53-signaling-pathways
#7
Zhongcheng Zhu
The active ingredients of natural plants are important sources of antitumor agents. Miltirone is a major effective ingredient in traditional Chinese medicine and it is considered to have anti-infection and immunosuppressive activities. Clinically, it is often used for the treatment of arthritis and immune diseases. The effect of miltirone on cisplatin-resistant lung cancer cells has not been investigated to date. The present study aimed to examine the anticancer effect of miltirone in cisplatin-resistant lung cancer cells...
June 2018: Oncology Letters
https://www.readbyqxmd.com/read/29927992/bcl-2-mediated-control-of-trail-induced-apoptotic-response-in-the-non-small-lung-cancer-cell-line-nci-h460-is-effective-at-late-caspase-processing-steps
#8
Lubna Danish, Dirke Imig, Frank Allgöwer, Peter Scheurich, Nadine Pollak
Dysregulation of the mitochondrial signaling pathway of apoptosis induction represents a major hurdle in tumor therapy. The objective of the presented work was to investigate the role of the intrinsic (mitochondrial) apoptotic pathway in the non-small lung cancer cell line NCI-H460 upon induction of apoptosis using the highly bioactive TRAIL derivative Db-scTRAIL. NCI-H460 cells were TRAIL sensitive but an only about 3 fold overexpression of Bcl-2 was sufficient to induce a highly TRAIL resistant phenotype, confirming that the mitochondrial pathway is crucial for TRAIL-induced apoptosis induction...
2018: PloS One
https://www.readbyqxmd.com/read/29926836/astragaloside-iv-protects-rgc-5-cells-against-oxidative-stress
#9
Ming Hao, Yu Liu, Ping Chen, Hong Jiang, Hong-Yu Kuang
Astragaloside IV is the main active compound of Astragalus membranaceus. Astragaloside IV has strong anti-oxidative activities and protective effects against progression of peripheral neuropathy. In this study, we determined whether astragaloside IV protects retinal ganglion cells (RGC) from oxidative stress injury using the rat RGC-5 cell line. Hydrogen peroxide (H2 O2 ) was used to induce oxidative stress injury, with the protective effect of astragaloside IV examined. Cell Counting Kit-8 and 4',6-diamidino-2-phenylindole staining showed that astragaloside IV increased cell survival rate and decreased apoptotic cell number...
June 2018: Neural Regeneration Research
https://www.readbyqxmd.com/read/29926678/-effect-of-dexmedetomidine-on-apoptosis-and-chop-in-hypoxia-reoxygenation-injury-a549-cell
#10
Zi-Yin Luo, Hui Gao, Bing-Qian Xiang, Xiao-Xiao Qiu, Yong-Yue Dai, Wan-Tie Wang
OBJECTIVES: To investigate the effects of dexmedetomidine (Dex) on injury of A549 cells induced by hypoxia/reoxygenation(H/R)and the influence of C/EBP homologous protein (CHOP) expression. METHODS: Logarithmic growth phase A549 cells(it originated from alveolar type Ⅱ epithelial cell line) were randomly divided into 4 groups ( n =10):normoxic control group (N), Dex group (D), hypoxia/reoxygenation group (H), hypoxia/reoxygenation + Dex group(HD). At the beginning of modeling, 1 nmol/L Dex was puted into D and HD groups...
February 8, 2018: Chinese Journal of Applied Physiology
https://www.readbyqxmd.com/read/29925937/attenuation-of-ventilation-induced-diaphragm-dysfunction-through-toll-like-receptor-4-and-nuclear-factor-%C3%AE%C2%BAb-in-a-murine-endotoxemia-model
#11
Li-Fu Li, Yung-Yang Liu, Ning-Hung Chen, Yen-Huey Chen, Chung-Chi Huang, Kuo-Chin Kao, Chih-Hao Chang, Li-Pang Chuang, Li-Chung Chiu
Mechanical ventilation (MV) is often used to maintain life in patients with sepsis and sepsis-related acute lung injury. However, controlled MV may cause diaphragm weakness due to muscle injury and atrophy, an effect termed ventilator-induced diaphragm dysfunction (VIDD). Toll-like receptor 4 (TLR4) and nuclear factor-κB (NF-κB) signaling pathways may elicit sepsis-related acute inflammatory responses and muscle protein degradation and mediate the pathogenic mechanisms of VIDD. However, the mechanisms regulating the interactions between VIDD and endotoxemia are unclear...
June 20, 2018: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/29925224/shikonin-exerts-cytotoxic-effects-in-human-colon-cancers-by-inducing-apoptotic-cell-death-via-the-endoplasmic-reticulum-and-mitochondria-mediated-pathways
#12
Xia Han, Kyoung Ah Kang, Mei Jing Piao, Ao Xuan Zhen, Yu Jae Hyun, Hyun Min Kim, Yea Seong Ryu, Jin Won Hyun
The apoptotic effects of shikonin (5,8-dihydroxy-2-[(1R)-1-hydroxy-4-methylpent-3-enyl]naphthalene-1,4-dione) on the human colon cancer cell line SNU-407 were investigated in this study. Shikonin showed dose-dependent cytotoxic activity against SNU-407 cells, with an estimated IC50 value of 3 μM after 48 h of treatment. Shikonin induced apoptosis, as evidenced by apoptotic body formation, sub-G1 phase cells, and DNA fragmentation. Shikonin induced apoptotic cell death by activating mitogen-activated protein kinase family members, and the apoptotic process was mediated by the activation of endoplasmic reticulum (ER) stress, leading to activation of the PERK/elF2α/CHOP apoptotic pathway, and mitochondrial Ca2+ accumulation...
June 21, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29923797/valproate-augments-niraparib-killing-of-tumor-cells
#13
Laurence Booth, Jane L Roberts, Rumeesa Rais, Andrew Poklepovic, Paul Dent
PARP1 inhibitors are approved therapeutic agents in ovarian carcinomas, and have clinical activity in some breast cancers. As a single agent, niraparib killed ovarian and mammary tumor cells via an ATM-AMPK-ULK1 pathway which resulted in mTOR inactivation and the formation of autophagosomes, temporally followed by autolysosome formation. In parallel, niraparib activated a CD95-FADD-caspase 8 pathway, and collectively these signals caused tumor cell death that was suppressed by knock down of Beclin1, ATG5, CD95, FADD or AIF; or by expression of c-FLIP-s, BCL-XL or dominant negative caspase 9...
June 20, 2018: Cancer Biology & Therapy
https://www.readbyqxmd.com/read/29923425/introducing-novel-potent-anticancer-agents-of-1h-benzo-f-chromene-scaffolds-targeting-c-src-kinase-enzyme-with-mda-mb-231-cell-line-anti-invasion-effect
#14
Hany E A Ahmed, Mohammed A A El-Nassag, Ahmed H Hassan, Rawda M Okasha, Saleh Ihmaid, Ahmed M Fouda, Tarek H Afifi, Ateyatallah Aljuhani, Ahmed M El-Agrody
In our effort to develop novel and powerful agents with anti-proliferative activity, two new series of 1H-benzo[f]chromene derivatives, 4a-h and 6a-h, were synthesised using heterocyclocondensation methodologies under microwave irradiation condition. The structures of the target compounds were established on the basis of their spectral data, IR, 1 H NMR, 13  C NMR, 13  C NMR-DEPT/APT, and MS data. The new compounds have been examined for their anti-proliferative activity against three cancer cell lines, MCF-7, HCT-116, and HepG-2...
December 2018: Journal of Enzyme Inhibition and Medicinal Chemistry
https://www.readbyqxmd.com/read/29923307/corilagin-inhibits-breast-cancer-growth-via-reactive-oxygen-species-dependent-apoptosis-and-autophagy
#15
Yinping Tong, Gongye Zhang, Yang Li, Jiajia Xu, Jiahui Yuan, Bing Zhang, Tianhui Hu, Gang Song
Corilagin is a component of Phyllanthus urinaria extract and has been found of possessing anti-inflammatory, anti-oxidative, and anti-tumour properties in clinic treatments. However, the underlying mechanisms in anti-cancer particularly of its induction of cell death in human breast cancer remain undefined. Our research found that corilagin-induced apoptotic and autophagic cell death depending on reactive oxygen species (ROS) in human breast cancer cell, and it occurred in human breast cancer cell (MCF-7) only comparing with normal cells...
June 19, 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29922074/effect-of-aqp-5-silencing-by-sirna-interference-on-chemosensitivity-of-breast-cancer-cells
#16
Xueqing Li, Bing Pei, Hui Wang, Chenghui Tang, Wei Zhu, Feng Jin
Objectives: Based on the functionality of AQP-5 characterized in various physiological processes, our study aimed to investigate the effect of AQP-5 silencing by siRNA interference on chemosensitivity of breast cancer cells. Materials and methods: The expression levels of AQP-5 mRNA in different experimental groups were measured by reverse transcription PCR. The chemosensitivity of the cells to adriamycin (ADR) was detected by a CCK-8 kit. Cell invasion, migration, and apoptosis were assessed...
2018: OncoTargets and Therapy
https://www.readbyqxmd.com/read/29922070/knockdown-of-long-noncoding-rna-00152-linc00152-inhibits-human-retinoblastoma-progression
#17
Songhe Li, Dacheng Wen, Songtian Che, Zhihua Cui, Yabin Sun, Hua Ren, Jilong Hao
Background: A growing body of evidence supports the involvement of long noncoding RNA 00152 (LINC00152) in the progression and metastasis of multiple cancers. However, the exact roles of LINC00152 in the progression of human retinoblastoma (RB) remain unknown. We explored the expression and biological function of human RB. Materials and methods: The expression level of LINC00152 in RB tissues and cells was analyzed using quantitative real-time PCR. The function of LINC00152 was determined using a series of in vitro assays...
2018: OncoTargets and Therapy
https://www.readbyqxmd.com/read/29921821/diethyl-blechnic-a-novel-natural-product-isolated-from-salvia-miltiorrhiza-bunge-inhibits-doxorubicin-induced-apoptosis-by-inhibiting-ros-and-activating-jnk1-2
#18
Jie Yu, Hongwei Gao, Chuanhong Wu, Qiong-Ming Xu, Jin-Jian Lu, Xiuping Chen
Doxorubicin (DOX) is a widely used antineoplastic agent in clinics. However, its clinical application is largely limited by its cardiotoxicity. Diethyl blechnic (DB) is a novel compound isolated from Salvia miltiorrhiza Bunge. Here, we study the effect of DB on DOX-induced cardiotoxicity and its underlying mechanisms. Cellular viability was tested by 3-[-4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) and protein level was evaluated by Western blotting. 5,5’,6,6’-tetrachloro-1,1’,3,3’-tetraethylbenzimidazolylcarbocyanine iodide (JC-1) staining was performed to determine the mitochondrial membrane potential (MMP)...
June 19, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29921671/the-pgrs-domain-of-mycobacterium-tuberculosis-pe_pgrs-protein-rv0297-is-involved-in-endoplasmic-reticulum-stress-mediated-apoptosis-through-toll-like-receptor-4
#19
Sonam Grover, Tarina Sharma, Yadvir Singh, Sakshi Kohli, Manjunath P, Aditi Singh, Torsten Semmler, Lothar H Wieler, Karsten Tedin, Nasreen Z Ehtesham, Seyed E Hasnain
The genome of Mycobacterium tuberculosis , the causal organism of tuberculosis (TB), encodes a unique protein family known as the PE/PPE/PGRS family, present exclusively in the genus Mycobacterium and nowhere else in the living kingdom, with largely unexplored functions. We describe the functional significance of the PGRS domain of Rv0297, a member of this family. In silico analyses revealed the presence of intrinsically disordered stretches and putative endoplasmic reticulum (ER) localization signals in the PGRS domain of Rv0297 (Rv0297PGRS)...
June 19, 2018: MBio
https://www.readbyqxmd.com/read/29921390/anti-tumor-mechanism-of-il-21-used-alone-and-in-combination-with-5-fluorouracil-in-vitro-on-human-gastric-cancer-cells
#20
Z Q Fu, Q Zhou, S Zhu, W Liu
To study the effect and related mechanism of IL-21 alone and in combination with 5-Fluorouracil on the proliferation and growth, transferability, and apoptosis of gastric cancer cells, we cultivated gastric cancer cell SGC-7901 and created four experimental groups with varying concentrations of IL-21 and 5-Fluorouracil: IL-21 group (IL-21 100ng/ml), semi-combination group (5-Fluorouracil 25μg/ml+IL-21 100ng/ml), 5-Fluorouracil group (5-Fluorouracil 50μg/ml), and combination group (5-Fluorouracil 50μg/ml+IL-21 100ng/ml)...
May 2018: Journal of Biological Regulators and Homeostatic Agents
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