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Molecular and Cellular Biochemistry

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https://read.qxmd.com/read/30778838/hydrogen-sulfide-modulates-sirt1-and-suppresses-oxidative-stress-in-diabetic-nephropathy
#1
Hanan H Ahmed, Fatma M Taha, Heba S Omar, Heba M Elwi, Marwa Abdelnasser
DN is recognized as not only a leading cause of end stage renal disease (ESRD) but also an independent risk factor for cardiovascular disease (CVD). Novel therapeutic approaches to diabetic nephropathy (DN) are needed, or else, healthcare resources will be overwhelmed by the expected worldwide increase in associated cases of ESRD and CVD. Reactive oxygen species (ROS) and advanced glycation end product (AGE) are implicated in the development of DN. Hydrogen sulfide (H2 S) is known for its antioxidant and antiapoptotic characteristics...
February 18, 2019: Molecular and Cellular Biochemistry
https://read.qxmd.com/read/30767098/hyperglycaemia-cause-vascular-inflammation-through-advanced-glycation-end-products-early-growth-response-1-axis-in-gestational-diabetes-mellitus
#2
Barathi Rajaraman, Nirupama Ramadas, Sundar Krishnasamy, Vidya Ravi, Atima Pathak, C S Devasena, Krishnan Swaminathan, Arunkumar Ganeshprasad, Ashok Ayyappa Kuppuswamy, Srinivasan Vedantham
Hyperglycaemia during pregnancy is the main reason for developing diabetes mediated vascular complications. Advanced glycation end products (AGEs) are formed due to non-enzymatic glycation of proteins, lipids and nucleic acids during hyperglycaemia. It has the potential to damage vasculature by modifying the substrate or by means of AGEs and receptor of AGE (RAGE) interaction. It has been linked with the pathogenesis of various vascular diseases including coronary heart disease, atherosclerosis, restenosis etc...
February 14, 2019: Molecular and Cellular Biochemistry
https://read.qxmd.com/read/30756222/attenuation-of-calmodulin-regulation-evokes-ca-2-oscillations-evidence-for-the-involvement-of-intracellular-arachidonate-activated-channels-and-connexons
#3
Egor A Turovsky, Valery P Zinchenko, Nikolai P Kaimachnikov
Intracellular Са2+ controls its own level by regulation of Ca2+ transport across the plasma and organellar membranes, often acting via calmodulin (CaM). Drugs antagonizing CaM action induce an increase in cytosolic Ca2+ concentration in different cells. We have found persistent Са2+ oscillations in cultured white adipocytes in response to calmidazolium (CMZ). They appeared at [CMZ] > 1 μM as repetitive sharp spikes mainly superimposed on a transient or elevated baseline. Similar oscillations were observed when we used trifluoperazine...
February 11, 2019: Molecular and Cellular Biochemistry
https://read.qxmd.com/read/30741368/lcal1-enhances-lung-cancer-survival-via-inhibiting-ampk-related-antitumor-functions
#4
Jun-Yu Li, Zhi-Qiang Luo
Lung cancer is one of the most common cancers and has been the most common cause of cancer deaths for several decades. Recently, lung cancer-associated lncRNA 1 (LCAL1) has been identified to be overexpressed in lung cancer tissues, while inhibiting LCAL1 expression has shown potential to inhibiting lung cancer growth. However, the molecular mechanism between LCAL1 and lung cancer cell survival remains poorly understood. In the present study, we provided the first evidence that LCAL1 may support lung cancer survival via inhibiting the activity of AMP-activated protein kinase (AMPK)...
February 11, 2019: Molecular and Cellular Biochemistry
https://read.qxmd.com/read/30739223/phospho-substrate-profiling-of-epac-dependent-protein-kinase-c-activity
#5
Diana J Goode, Derek C Molliver
Exchange protein directly activated by cAMP (Epac) and protein kinase A are effectors for cAMP with distinct actions and regulatory mechanisms. Epac is a Rap guanine nucleotide exchange factor that activates Rap1; protein kinase C (PKC) is a major downstream target of Epac-Rap1 signaling that has been implicated in a variety of pathophysiological processes, including cardiac hypertrophy, cancer, and nociceptor sensitization leading to chronic pain. Despite the implication of both Epac and PKC in these processes, few downstream targets of Epac-PKC signaling have been identified...
February 9, 2019: Molecular and Cellular Biochemistry
https://read.qxmd.com/read/30737644/er%C3%AE-modulates-genistein-s-cisplatin-enhancing-activities-in-breast-cancer-mda-mb-231-cells-via-p53-independent-pathway
#6
Ren Liu, Xiaolin Xu, Chenglin Liang, Xin Chen, Xiaowei Yu, Hongfei Zhong, Wenxiu Xu, Yu Cheng, Wei Wang, Yudong Wu, Lehan Yu, Xiaojuan Hu
As one of the typical food-derived phytoestrogens, genistein (GEN) could bind to estrogen receptor (ER) and was reported to be closely related to breast cancer. Our former research showed that GEN interfered with the anti-tumor effects of cisplatin (CIS) in breast cancer MCF-7 (ERα+/ERβ-) cells. However, it is not clear whether ER expression pattern affects GEN's modulation on CIS's activity. In the present study, breast cancer ERβ knockdown (ERβKD) MDA-MB-231 (ERα-/ERβ+) cell model was established via ERβ RNAi lentivirus infection...
February 8, 2019: Molecular and Cellular Biochemistry
https://read.qxmd.com/read/30715670/samd9-is-a-epi-genetically-regulated-anti-inflammatory-factor-activated-in-ra-patients
#7
Pei He, Long-Fei Wu, Peng-Fei Bing, Wei Xia, Lan Wang, Fang-Fei Xie, Xin Lu, Shu-Feng Lei, Fei-Yan Deng
To identify PBMC-expressed genes significant for RA, and to ascertain their upstream regulatory factors, as well as downstream functional effects relevant to RA pathogenesis. We performed peripheral blood mononuclear cells (PBMCs) transcriptome-wide mRNA expression profiling in a case-control discovery sample. Differentially expressed genes (DEGs) were identified and validated in PBMCs in independent samples. We also generated genome-wide SNP genotyping data, and collected miRNA expression data and DNA methylation data from PBMCs of the discovery sample...
February 4, 2019: Molecular and Cellular Biochemistry
https://read.qxmd.com/read/30712071/estrogen-modulates-the-differential-expression-of-cardiac-myocyte-chymase-isoforms-and-diastolic-function
#8
Hao Wang, Xuming Sun, Sarfaraz Ahmad, Jing Su, Carlos Maria Ferrario, Leanne Groban
Chymases, a family of serine proteases with chymotryptic activity, play a significant role in cardiac angiotensin II (Ang II) formation from its substrate Ang-(1-12) in both human and rodent models. No studies, to date, have assessed the differences in enzymatic activity among these isoforms in Ang II formation, particularly in the cardiomyocyte (CM). Using PCR and DNA sequencing, we demonstrated that MCP-1, MCP-2, MCP-4, and MCP-5 mRNAs are expressed in the CM of both spontaneously hypertensive rats (SHR) and normotensive Wistar-Kyoto rats (WKY)...
February 2, 2019: Molecular and Cellular Biochemistry
https://read.qxmd.com/read/30710197/heat-shock-protein-60-negatively-regulates-the-biological-functions-of-ubiquitin-like-protein-mnsf%C3%AE-in-macrophages
#9
Morihiko Nakamura, Kaori Notsu, Mai Nakagawa
Monoclonal nonspecific suppressor factor β (MNSFβ) is a ubiquitously expressed ubiquitin-like protein known to be involved in various biological functions. Previous studies have demonstrated that MNSFβ covalently modify its target proteins including Bcl-G, a proapoptotic protein. In this study, we purified a 65 kDa MNSFβ adduct from mouse liver lysates by sequential chromatography on DEAE and glutathione S-transferase (GST)-fusioned MNSFβ immobilized on glutathione-Sepharose beads in the presence of ATP...
February 1, 2019: Molecular and Cellular Biochemistry
https://read.qxmd.com/read/30694515/distinct-proteomic-profiles-in-monozygotic-twins-discordant-for-ischaemic-stroke
#10
Nirmal Vadgama, Douglas Lamont, John Hardy, Jamal Nasir, Ruth C Lovering
Stroke is a common disorder with significant morbidity and mortality, and complex aetiology involving both environmental and genetic risk factors. Although some of the major risk factors for stoke, such as smoking and hypertension, are well-documented, the underlying genetic and detailed molecular mechanisms remain elusive. Exploring the relevant biochemical pathways may contribute to the clinical diagnosis of stroke and shed light on its aetiology. A comparative proteomic analysis of blood serum of a pair of monozygotic (MZ) twins discordant for ischaemic stroke (IS) was performed using a label-free quantitative proteomics approach...
January 29, 2019: Molecular and Cellular Biochemistry
https://read.qxmd.com/read/30689107/density-dependent-erk-mapk-expression-regulates-mmp-9-and-influences-growth
#11
Vincent Marchese, Jazmin Juarez, Priyal Patel, Dorothy Hutter-Lobo
Previous work has shown that expression of the extracellular signal-regulated kinase (ERK) is decreased by high density in normal fibroblast cells, and this was correlated with increased expression of mitogen-activated protein kinase phosphatases. Because of these differences in ERK regulation upon contact inhibition, it is likely that other cellular responses may be influenced by the attainment of a contact-inhibited state. Expression of matrix metalloproteinase-9 and cadherin cleavage were both found to be decreased upon reaching high culture density...
January 28, 2019: Molecular and Cellular Biochemistry
https://read.qxmd.com/read/30684134/inhibition-of-secretory-phospholipase-a2-iia-attenuates-prostaglandin-e2-induced-invasiveness-in-lung-adenocarcinoma
#12
Alison L Halpern, Patrick D Kohtz, Jessica Y Rove, Lihua Ao, Xianzhong Meng, David A Fullerton, Michael J Weyant
Secretory phospholipase A2 IIa (sPLA2 IIa) catalyzes the production of multiple inflammatory mediators that influence the development of lung and other cancers. The most potent of these carcinogenic mediators is prostaglandin E2 (PGE2). We hypothesize that sPLA2 IIa inhibition modulates the production of PGE2, and sPLA2 IIa inhibition exerts its antineoplastic effects via downregulation of PGE2 production. We aim to evaluate these relationships via analysis of PGE2-mediated growth regulation pathways. A549 and H1650 lung adenocarcinoma cells were assayed for PGE2 production in the presence of sPLA2 IIa inhibitor...
January 25, 2019: Molecular and Cellular Biochemistry
https://read.qxmd.com/read/30684133/phosphorylation-of-tsc2-by-pkc-%C3%AE-reveals-a-novel-signaling-pathway-that-couples-protein-synthesis-to-mtorc1-activity
#13
Jun Zhan, Raghu K Chitta, Frank C Harwood, Gerard C Grosveld
Downstream of insulin-like growth factor receptor, the TSC1/2/ TCB1D7 (tuberous sclerosis complex) and mTOR (mechanistic target of rapamycin) pathways are implicated in many human diseases, including cancer and diabetes. Targeting this pathway is currently an important approach for palliating or eradicating cancer. Downstream of mTOR, translational machinery targeting holds great promise for anticancer drug development. Therefore, we investigated whether the protein synthesis machinery that is regulated by mTORC1 (mTOR complex 1) signaling can in turn regulate mTORC1 activity...
January 25, 2019: Molecular and Cellular Biochemistry
https://read.qxmd.com/read/30652241/protective-effect-of-omeprazole-and-lansoprazole-on-%C3%AE-receptor-stimulated-myocardial-infarction-in-wistar-rats
#14
Ashwini S Patil, Alok D Singh, Umesh B Mahajan, Chandragouda R Patil, Shreesh Ojha, Sameer N Goyal
We investigated the effect of omeprazole (OPZ) and lansoprazole (LPZ) on the pathophysiology of myocardial necrosis in rats by inspecting a series of indicators like hemodynamic parameters, biochemical estimations and histopathological changes in the myocardial tissue. Rats received either OPZ, LPZ (50 mg/kg/day, p.o.) individually for 7 days with concurrent administration of isoproterenol (ISO) (150 mg/kg, s.c.) on 6th and 7th day of study period to induce myocardial infarction. On the 8th day after measuring hemodynamic parameters, rats were killed and parameters were evaluated...
January 16, 2019: Molecular and Cellular Biochemistry
https://read.qxmd.com/read/30644017/lidocaine-alleviates-cytotoxicity-resistance-in-lung-cancer-a549-ddp-cells-via-down-regulation-of-mir-21
#15
Qing Yang, Zhi Zhang, Haixia Xu, Chuangen Ma
Lidocaine (Lido) is a commonly used local anesthetic, which has been reported in various types of cells. However, the effects of Lido on lung cancer cells remain not understood. The study aimed to investigate the underlying mechanisms of Lido in the cisplatin resistance of A549/DDP cells. Different concentrations of cisplatin (0-320 µM) were used to stimulate A549 and A549/DDP cells, and cell viability and apoptosis were examined. To investigate the effect of Lido on A549/DDP cells, the optimum concentration of Lido was selected to treat A549/DDP cells, and cell viability, apoptosis, migration and invasion were then detected...
January 14, 2019: Molecular and Cellular Biochemistry
https://read.qxmd.com/read/30635820/lncrna-zeb2-as1-contributes-to-the-tumorigenesis-of-gastric-cancer-via-activating-the-wnt-%C3%AE-catenin-pathway
#16
Feixia Wang, Wu Zhu, Ruili Yang, Wanhua Xie, Daojun Wang
Studies have shown that long noncoding RNA Zinc finger E-box-binding homeobox 2 antisense RNA 1 (ZEB2-AS1) is involved in the progression of lung cancer, bladder cancer, and hepatocellular carcinoma. However, its role in the pathogenesis of gastric cancer remains unknown. The Wnt/β-catenin pathway contributes to the development of gastric cancer. ZEB2-AS1 expression was firstly detected in the gastric carcinoma tissue samples as well as in gastric cancer cells. Knockdown of ZEB2-AS1 was performed by ZEB2-AS1-shRNA, and the viability, migration, invasion, and apoptosis of gastric cancer cells were determined by CCK-8, scratch assay, transwell, and flow cytometry, respectively...
January 11, 2019: Molecular and Cellular Biochemistry
https://read.qxmd.com/read/30604066/knockdown-of-kdm2a-inhibits-proliferation-associated-with-tgf-%C3%AE-expression-in-hek293t-cell
#17
Wen-Hao Xu, Da-Yan Liang, Qi Wang, Jinhua Shen, Qing-Hua Liu, Yong-Bo Peng
Lysine-specific demethylase 2A (KDM2A, also known as JHDM1A or FBXL11) plays an important role in regulating cell proliferation. However, the mechanisms on KDM2A controlling cell proliferation are varied among cell types, even controversial conclusions have been drawn. In order to elucidate the functions and underlying mechanisms for KDM2A controlling cell proliferation and apoptosis, we screened a KDM2A knockout HEK293T cell lines by CRISPR-Cas9 to illustrate the effects of KDM2A on both biological process...
January 2, 2019: Molecular and Cellular Biochemistry
https://read.qxmd.com/read/30604065/differential-distribution-of-peroxisomal-proteins-points-to-specific-roles-of-peroxisomes-in-the-murine-retina
#18
Yannick Das, Nele Roose, Lies De Groef, Marc Fransen, Lieve Moons, Paul P Van Veldhoven, Myriam Baes
The retinal pathology in peroxisomal disorders suggests that peroxisomes are important to maintain retinal homeostasis and function. These ubiquitous cell organelles are mainly involved in lipid metabolism, which comprises α- and β-oxidation and ether lipid synthesis. Although peroxisomes were extensively studied in liver, their role in the retina still remains to be elucidated. As a first step in gaining more insight into the role of peroxisomes in retinal physiology, we performed immunohistochemical stainings, immunoblotting and enzyme activity measurements to reveal the distribution of peroxisomes and peroxisomal lipid metabolizing enzymes in the murine retina...
January 2, 2019: Molecular and Cellular Biochemistry
https://read.qxmd.com/read/30564960/il-17a-il-17ra-promotes-invasion-and-activates-mmp-2-and-mmp-9-expression-via-p38-mapk-signaling-pathway-in-non-small-cell-lung-cancer
#19
Zhenhua Wu, Dan He, Shuyuan Zhao, Hongjiang Wang
The present study is to investigate the effect and mechanism of action of interleukin (IL)-17A and its receptor IL-17RA on non-small cell lung cancer (NSCLC). A total of 139 NSCLC patients were included in the study. NSCLC tissues and tumor-adjacent tissues were collected from the patients. Human NSCLC cell lines H157, H1975, and A549 were used for in vitro studies. MTT assay was performed to determine cell proliferation. Wound healing assay was used to determine cell motility. Transwell assay was carried out to detect migration and invasion...
December 18, 2018: Molecular and Cellular Biochemistry
https://read.qxmd.com/read/30535530/analgesic-antitumor-peptide-inhibits-angiogenesis-by-suppressing-akt-activation-in-hepatocellular-carcinoma
#20
Qingxin Cao, Wuguang Lu, Tingting Zhou, Yu Liu, Xueting Cai, Jin Zhu, Peng Cao
Hepatocellular carcinoma (HCC) is one of leading causes of cancer-related death, and its increasing incidence worldwide is a cause for concern. The recombinant analgesic-antitumor peptide (rAGAP), a protein consisting of small ubiquitin-related modifier linked with a hexa-histidine tag, exhibited the antitumor activity in HepG2 tumors in our previous study. However, the underlying molecular mechanism of its antitumor activity was still elusive. In this work, we found that treatment with rAGAP reduced phosphorylation of AKT at non-toxic doses in HepG2 cells in vitro...
December 10, 2018: Molecular and Cellular Biochemistry
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