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Molecular and Cellular Biochemistry

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https://www.readbyqxmd.com/read/29332143/conjunction-of-g-quadruplex-and-stem-loop-in-the-5-untranslated-region-of-mouse-hepatocyte-nuclear-factor-4-alpha1-mediates-strong-inhibition-of-protein-expression
#1
Shangdong Guo, Hong Lu
Hepatocyte nuclear factor 4-alpha (HNF4α) is a well-established master regulator of liver development and function. Restoration of HNF4α can treat multiple liver disorders and liver cancers. To date, HNF4α is still "undruggable" due to lack of known activating ligands. Thus, understanding the regulatory mechanism of HNF4α expression may help develop an alternative approach to modulate HNF4α protein levels. G-quadruplexes (G4) are non-canonical stable secondary structures discovered mostly in the promoters of oncogenes...
January 13, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29330688/hepatocyte-nuclear-factors-as-possible-c-reactive-protein-transcriptional-inducer-in-the-liver-and-white-adipose-tissue-of-rats-with-experimental-chronic-renal-failure
#2
Elzbieta Sucajtys-Szulc, Alicja Debska-Slizien, Boleslaw Rutkowski, Ryszard Milczarek, Iwona Pelikant-Malecka, Tomasz Sledzinski, Julian Swierczynski, Marek Szolkiewicz
Inflammation related to chronic kidney disease (CKD) is an important clinical problem. We recently determined that hepatocyte nuclear factor 1α (HNF1α) was upregulated in the livers of chronic renal failure (CRF) rats-experimental model of CKD. Considering that the promoter region of gene encoding C-reactive protein (CRP) contains binding sites for HNF1α and that the loss-of-function mutation in the Hnfs1α leads to significant reduction in circulating CRP levels, we hypothesized that HNF1α can activate the Crp in CRF rats...
January 12, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29327289/study-of-adenylyl-cyclase-g%C3%AE-s-interactions-and-identification-of-novel-ac-ligands
#3
Appalaraju Jaggupilli, Premnath Dhanaraj, Alexander Pritchard, John L Sorensen, Shyamala Dakshinamurti, Prashen Chelikani
Adenylyl cyclases (ACs) are membrane bound enzymes that catalyze the production of cAMP from ATP in response to the activation by G-protein Gαs. Different isoforms of ACs are ubiquitously expressed in different tissues involved in regulatory mechanisms in response to specific stimulants. There are 9 AC isoforms present in humans, with AC5 and AC6 proposed to play a vital role in cardiac functions. The activity of AC6 is sensitive to nitric oxide, such that nitrosylation of the protein might regulate its function...
January 11, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29327288/expression-of-pfkfb3-and-ki67-in-lung-adenocarcinomas-and-targeting-pfkfb3-as-a-therapeutic-strategy
#4
Xiaoli Li, Jian Liu, Li Qian, Honggang Ke, Chan Yao, Wei Tian, Yifei Liu, Jianguo Zhang
Phosphofructokinase-2/fructose-2, 6-bisphosphatase 3 (PFKFB3) catalyzes the synthesis of F2,6BP, which is an allosteric activator of 6-phosphofructo-1-kinase (PFK-1): the rate-limiting enzyme of glycolysis. During tumorigenesis, PFKFB3 increases glycolysis, angiogenesis, and tumor progression. In this study, our aim was to investigate the significance of PFKFB3 and Ki67 in human lung adenocarcinomas and to target PFKFB3 as a therapeutic strategy. In this study, we determined the expression levels of PFKFB3 mRNA and proteins in cancerous and normal lung adenocarcinomas by quantitative reverse transcription PCR (qRT-PCR), Western blot analysis, and tissue microarray immunohistochemistry analysis, respectively...
January 11, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29322353/quercetin-exerts-cardiovascular-protective-effects-in-lps-induced-dysfunction-in-vivo-by-regulating-inflammatory-cytokine-expression-nf-%C3%AE%C2%BAb-phosphorylation-and-caspase-activity
#5
Xiqing Wei, Xiangli Meng, Yuxiang Yuan, Fengjuan Shen, Chengqiu Li, Jun Yang
Impaired myocardial contractile function, one of the well-documented features of sepsis, contributes greatly to the high rate of mortality. Quercetin is widely accepted as a potential antioxidant and free radical scavenger. Epidemiologic studies have suggested that an increase in the intake of dietary Quercetin can reduce the risk of cardiac disease. However, presently there is no report yet on the influence of Quercetin on LPS-induced myocardial dysfunction in vivo. Cardiovascular protective effects of Quercetin on LPS-induced sepsis in mice were measured after intragastric administration, using normal saline as a positive control...
January 10, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29318457/decreased-intracellular-granule-movement-and-glucagon-secretion-in-pancreatic-%C3%AE-cells-attached-to-superior-cervical-ganglion-neurites
#6
Kiyoto Watabe, Satoru Yokawa, Yoshikazu Inoh, Takahiro Suzuki, Tadahide Furuno
Autonomic neurons innervate pancreatic islets of Langerhans and participate in the maintenance of blood glucose concentrations by controlling hormone levels through attachment with islet cells. We previously found that stimulated superior cervical ganglia (SCG) could induce Ca2+ oscillation in α cells via neuropeptide substance P using an in vitro co-culture model. In this study, we studied the effect of SCG neurite adhesion on intracellular secretory granule movement and glucagon secretion in α cells stimulated by low glucose concentration...
January 9, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29318456/voltage-dependence-of-the-ca2-transient-in-endocardial-and-epicardial-myocytes-from-the-left-ventricle-of-goto-kakizaki-type-2-diabetic-rats
#7
Lina Al Kury, Vadym Sydorenko, Manal M A Smail, Muhammad Anwar Qureshi, Anatoliy Shmygol, Murat Oz, Jaipaul Singh, Frank Christopher Howarth
Diabetes mellitus is a major global health disorder and, currently, over 450 million people have diabetes with 90% suffering from type 2 diabetes. Left untreated, diabetes may lead to cardiovascular diseases which are a leading cause of death in diabetic patients. Calcium is the trigger and regulator of cardiac muscle contraction and derangement in cellular Ca2+ homeostasis, which can result in heart failure and sudden cardiac death. It is of paramount importance to investigate the regional involvement of Ca2+ in diabetes-induced cardiomyopathy...
January 9, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29318455/4-6-dimethoxyisoflavone-7-o-%C3%AE-d-glucopyranoside-wistin-is-a-peroxisome-proliferator-activated-receptor-%C3%AE-ppar%C3%AE-agonist-in-mouse-hepatocytes
#8
Misato Suzuki, Fumiya Nakamura, Emi Taguchi, Maho Nakata, Fumi Wada, Momoka Takihi, Tomoyo Inoue, Shinji Ohta, Hiroyuki Kawachi
Peroxisome proliferator-activated receptors (PPARs) are ligand-dependent transcription factors that regulate lipid and glucose metabolism. PPARα mainly affects fatty acid metabolism, and its activation lowers lipid levels. PPARγ is involved in the regulation of adipogenesis, insulin sensitivity, energy balance, and lipid biosynthesis. We have previously reported that 4',6-dimethoxyisoflavone-7-O-β-D-glucopyranoside (wistin) can activate PPARγ. The purpose of the present study is to investigate the PPARα agonist activity of wistin...
January 9, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29318454/gl261-glioma-tumor-cells-respond-to-atp-with-an-intracellular-calcium-rise-and-glutamate-release
#9
Averey D Strong, M Caitlin Indart, Nolan R Hill, Richard L Daniels
Glioblastoma (GBM) is an aggressive brain cancer with an average survival rate of 15 months. The composition of the GBM tumor microenvironment-its pH, the presence of growth and immune factors, neurotransmitters, and gliotransmitters-plays an important role in GBM pathophysiology and facilitates tumor survival and growth. In particular, GBM tumor cells produce glutamate, which is toxic to healthy tissue and is associated with increased tumor invasion into adjacent brain regions. The conditions that lead to this excitotoxic release of glutamate are not completely understood...
January 9, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29305679/decreased-coronary-arteriolar-response-to-kca-channel-opener-after-cardioplegic-arrest-in-diabetic-patients
#10
Yuhong Liu, Victoria Cole, Isabella Lawandy, Afshin Ehsan, Frank W Sellke, Jun Feng
We have recently found that diabetes is associated with the inactivation of the calcium-activated potassium channels (KCa) in endothelial cells, which may contribute to endothelial dysfunction in diabetic patients at baseline. In the current study, we further investigated the effects of diabetes on coronary arteriolar responses to the small (SK) and intermediate (IK) KCa opener NS309 in diabetic and non-diabetic patients and correlated that data with the changes in the SK/IK protein expression/distribution in the setting of cardioplegic ischemia and reperfusion (CP) and cardiopulmonary bypass (CPB)...
January 5, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29305678/the-role-of-adipose-derived-stem-cells-in-a-self-organizing-3d-model-with-regard-to-human-soft-tissue-healing
#11
Martin Oberringer, Monika Bubel, Martina Jennewein, Silke Guthörl, Tamara Morsch, Sophie Bachmann, Wolfgang Metzger, Tim Pohlemann
The clinical phenomenon of inadequate soft tissue healing still remains an important issue. The occurrence of chronic wounds is correlated to the life span, which is still increasing in western countries. Tissue engineering products containing adipose-derived stem cells are discussed as a promising therapeutic approach. Several studies confirmed the value of these cells for soft tissue healing improvement, suggesting a paracrine as well as a direct effect on vessel repair and angiogenesis. In an attempt to figure out specific effects of adipose-derived stem cells on dermal microvascular endothelial cells with respect to the different phases of soft tissue healing, we designed a 3D in vitro model on the basis of spheroids...
January 5, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29302836/proteomic-analysis-of-cardiac-ventricles-baso-apical-differences
#12
Adam Eckhardt, Lucie Kulhava, Ivan Miksik, Statis Pataridis, Marketa Hlavackova, Jana Vasinova, Frantisek Kolar, David Sedmera, Bohuslav Ostadal
The heart is characterized by a remarkable degree of heterogeneity. Since different cardiac pathologies affect different cardiac regions, it is important to understand molecular mechanisms by which these parts respond to pathological stimuli. In addition to already described left ventricular (LV)/right ventricular (RV) and transmural differences, possible baso-apical heterogeneity has to be taken into consideration. The aim of our study has been, therefore, to compare proteomes in the apical and basal parts of the rat RV and LV...
January 4, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29299748/association-of-col4a1-rs605143-rs565470-and-cd14-rs2569190-genes-polymorphism-with-coronary-artery-disease
#13
Syed Tasleem Raza, Shania Abbas, Ale Eba, Fazal Karim, Irshad Ahmad Wani, Saliha Rizvi, Alina Zaidi, Farzana Mahdi
Coronary artery disease (CAD) is the leading cause of death worldwide and it is basically caused by atherosclerosis. The atherosclerotic process includes complex events and each one involves a specific biological pathway and different genes. According to World Health Organization report, Cardiovascular diseases will be the largest cause of death and disability by 2020, with an estimated 2.6 million Indians predicted to die due to CAD predominantly with myocardial infarction. Genetic factors are estimated to contribute 30-60% of the CAD risk...
January 3, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29299747/gdc-0152-induced-autophagy-promotes-apoptosis-in-hl-60-cells
#14
Liang Peiqi, Hu Rong, Dong Hongming, Liu Zhuogang, Jiang Wei, Miao Miao
GDC-0152 is a new type of chemical compound which can downregulate inhibitor of apoptosis protein. We previously reported that GDC-0152 induced apoptosis in HL-60 cells in a caspase-dependent manner. In this study, we have focused on GDC-0152-induced autophagy and the relationship between apoptosis and autophagy. We found that GDC-0152 can evoke autophagy flux as confirmed by the upregulation of LC3 and downregulation of p62. The conversion of LC3I to LC3II verified the existence of autophagy flux further. GDC-0152 induced autophagy through downregulating B cell lymphoma 2 and Bcl-2-interacting myosin-like coiled-coil protein, and upregulating WD-repeat domain phosphoinositide-interacting protein 1...
January 3, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29294217/rbx1-mediated-ubiquitination-of-sesn2-promotes-cell-death-upon-prolonged-mitochondrial-damage-in-sh-sy5y-neuroblastoma-cells
#15
Ashish Kumar, Chandrima Shaha
Sestrins are evolutionary conserved stress-inducible genes which regulate the axis of cell survival and cell death. Suppression of Sestrin 2 (SESN2) has been linked with increase in oxidative stress and cell death but mechanistic details related to regulation of SESN2 during mitochondrial damage remain unknown. Our study shows that prolonged CCCP-induced mitochondrial damage decreases SESN2 levels and viability of SH-SY5Y cells while overexpression of SESN2 significantly rescues the viability of cells. Further, we demonstrate that Ring box protein 1 (RBX1) is a novel interactive partner and E3 ligase for SESN2 which mediates its K-48-linked ubiquitination upon extensive mitochondrial damage...
January 2, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29288468/interactions-between-bradykinin-and-plasmin-in-the-endothelial-ca2-response
#16
Yukako Obata, Kazuhiko Takeuchi, Jiazhang Wei, Akio Hakamata, Keiichi Odagiri, Yoshiki Nakajima, Hiroshi Watanabe
Plasmin is a fibrinolytic factor and a serine protease that activates protease-activated receptors (PARs) to produce endothelium-derived relaxing factors such as nitric oxide and prostacyclin. Nitric oxide and prostacyclin production is regulated, at least in part, by the intracellular Ca2+ concentration in various blood vessel types. Bradykinin and plasmin stimulate vascular endothelial cells and work simultaneously in pathophysiological conditions such as thrombosis and inflammation. Here, we explored the interactions between bradykinin and plasmin in the endothelial Ca2+ response using the fluorescent indicator, Fura-2/AM, in primary cultures of porcine aortic endothelial cells (PAECs)...
December 29, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29280086/negative-regulation-of-mavs-mediated-innate-immune-response-by-asc
#17
Yue Han, Xiang He, Congwen Wei, Ting Song, Ling Zou, Zihui Li, Jiazhou Ye, Lunan Qi, Lequn Li, Hui Zhong, Feixiang Wu
Stringent control of the type I interferon signaling pathways is critical to effective host immune responses, however, the molecular mechanisms that negatively regulate these pathways are still poorly understood. Here, we show that apoptosis speck-like protein (ASC), an adaptor protein of inflammasome complex, can inhibit IFN-β signaling response by interacting with mitochondrial antiviral signaling protein (MAVS). Importantly, ASC-specific siRNA knockdown enhanced virus-induced type I interferon production, with consequent reduction of virus replication...
December 26, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29273849/effects-of-autophagy-on-acid-sensing-ion-channel-1a-mediated-apoptosis-in-rat-articular-chondrocytes
#18
Ya-Ya Xie, Yue Li, Ren-Peng Zhou, Bei-Bei Dai, Yue-Jiao Qian, Xiao-Shan Wu, Jin-Fang Ge, Wei Hu, Fei-Hu Chen
Rheumatoid arthritis (RA) is a degenerative joint disease that is caused by multiple pathogenic factors. However, the precise etiology of RA is still unknown. Our previous studies demonstrated that acid-sensing ion channel 1a (ASIC1a)-mediated articular chondrocyte apoptosis played a key role in the progression of RA. In this study, we aim to explore whether ASIC1a mediates autophagy or not and the effect of autophagy on ASIC1a-mediated apoptosis. Primary articular chondrocytes, extracted from rat knee joints, were exposed to different concentrations of concentrated hydrochloric acid for different time intervals in vitro...
December 22, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29264825/fenofibrate-ameliorates-diabetic-retinopathy-by-modulating-nrf2-signaling-and-nlrp3-inflammasome-activation
#19
Qiuping Liu, Fengjun Zhang, Xian Zhang, Rui Cheng, Jian-Xing Ma, Jinglin Yi, Jingming Li
Oxidative stress and neuroinflammation contribute significantly to the development and progression of diabetic retinopathy. Fenofibrate has received great attention as it benefits diabetic patients by reducing retinal laser requirement. Nuclear factor erythroid-2-related factor 2 (Nrf2) is a master regulator of anti-oxidative defense. Activation of nucleotide binding domain, leucine-rich repeat-containing receptor (NLR), pyrin domain-containing 3 (NLRP3) inflammasome plays a pivotal role in neuroinflammation...
December 21, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29260433/coordinated-targeting-of-mmp-2-mmp-9-by-mir-296-3p-foxcut-exerts-tumor-suppressing-effects-in-choroidal-malignant-melanoma
#20
Xinhe Wang, Yuedong Hu, Jianyi Cui, Yun Zhou, Lei Chen
Choroidal melanoma is the most common intraocular tumor in adults, and overexpression of matrix metalloproteinase-2 or matrix metalloproteinase-9 (MMP-2/MMP-9) is associated with angiogenesis and tumor metastasis of the choroidal malignant melanoma (CMM). This study aims to investigate the functions and mechanisms of microRNA or long non-coding RNA-targeted MMP-2/MMP-9 in CMM. We demonstrated that expressions of MMP-2/MMP-9 were increased in CMM tissues and C918 cells in comparison with normal choroidal melanocytes...
December 19, 2017: Molecular and Cellular Biochemistry
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