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https://www.readbyqxmd.com/read/27922662/metabolic-reprogramming-and-ampk%C3%AE-1-pathway-activation-by-caulerpin-in-colorectal-cancer-cells
#1
Hua Yu, Huiqin Zhang, Mingjun Dong, Zhou Wu, Zhonglei Shen, Yangyang Xie, Zhenfang Kong, Xiaoyu Dai, Binbin Xu
Caulerpin, a secondary metabolite from the marine invasive green algae Caulerpa cylindracea is known to induce mitochondrial dysfunctions. In this study, the anticancer property of caulerpin was assessed in a panel of colorectal cancer cell lines. We demonstrated that caulerpin inhibited oxidative phosphorylation (OXPHOS) and facilitated an early intervention of the mitochondrial function, via inhibiting mitochondrial complex I, accompanied by the dissipation of mitochondrial membrane potential and a surge of reactive oxygen species (ROS) generation...
December 6, 2016: International Journal of Oncology
https://www.readbyqxmd.com/read/27922102/slc2a8-glut8-is-a-mammalian-trehalose-transporter-required-for-trehalose-induced-autophagy
#2
Allyson L Mayer, Cassandra B Higgins, Monique R Heitmeier, Thomas E Kraft, Xia Qian, Jan R Crowley, Krzysztof L Hyrc, Wandy L Beatty, Kevin E Yarasheski, Paul W Hruz, Brian J DeBosch
Trehalose is a disaccharide demonstrated to mitigate disease burden in multiple murine neurodegenerative models. We recently revealed that trehalose rapidly induces hepatic autophagy and abrogates hepatic steatosis by inhibiting hexose transport via the SLC2A family of facilitative transporters. Prior studies, however, postulate that intracellular trehalose is sufficient to induce cellular autophagy. The objective of the current study was to identify the means by which trehalose accesses the hepatocyte cytoplasm, and define the distal signaling mechanisms by which trehalose induces autophagy...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27921082/global-role-of-cyclic-amp-signaling-in-ph-dependent-responses-in-candida-albicans
#3
Jeffrey M Hollomon, Nora Grahl, Sven D Willger, Katja Koeppen, Deborah A Hogan
Candida albicans behaviors are affected by pH, an important environmental variable. Filamentous growth is a pH-responsive behavior, where alkaline conditions favor hyphal growth and acid conditions favor growth as yeast. We employed filamentous growth as a tool to study the impact of pH on the hyphal growth regulator Cyr1, and we report that downregulation of cyclic AMP (cAMP) signaling by acidic pH contributes to the inhibition of hyphal growth in minimal medium with GlcNAc. Ras1 and Cyr1 are generally required for efficient hyphal growth, and the effects of low pH on Ras1 proteolysis and GTP binding are consistent with diminished cAMP output...
November 2016: MSphere
https://www.readbyqxmd.com/read/27921040/new-insights-into-the-molecular-mechanisms-targeting-tubular-channels-transporters-in-pkd-development
#4
REVIEW
Ming Wu, Shengqiang Yu
BACKGROUND: Autosomal dominant polycystic kidney disease (PKD) or autosomal recessive PKD is caused by a mutation in the PKD1, PKD2 or PKHD1 gene, which encodes polycystin-1, polycystin-2 or fibrocystin, respectively. Embryonic and postnatal mutation studies show that transport or channel function is dysregulated before the initiation of cystogenesis, suggesting that the abnormality of transport or channel function plays a critical role in the pathology of PKD. SUMMARY: Polycystin-2 by itself is a calcium-permeable cation channel, and its channel function can be regulated by polycystin-1 or fibrocystin...
October 2016: Kidney Diseases
https://www.readbyqxmd.com/read/27921039/clinical-manifestation-and-management-of-adpkd-in-western-countries
#5
REVIEW
Claudia Sommerer, Martin Zeier
BACKGROUND: Autosomal dominant polycystic kidney disease (ADPKD) is the most common hereditary kidney disease in Western countries. The prevalence is between 2.4/10,000 and 3.9/10,000. ADPKD represents a systemic disease resulting in deterioration in renal function. Until now, mutations in two genes (PKD1 and PKD2) have been identified. Recently, the European Medicines Agency (EMA) approved the use of the vasopressin V2 receptor antagonist tolvaptan to slow the progression of cyst development and renal insufficiency connected with ADPKD in adult patients with chronic kidney disease stages 1-3 at initiation of treatment with evidence of rapidly progressing disease...
October 2016: Kidney Diseases
https://www.readbyqxmd.com/read/27920197/supplementation-of-fine-and-coarse-limestone-in-different-ratios-in-a-split-feeding-system-effects-on-performance-egg-quality-and-bone-strength-in-old-laying-hens
#6
A Molnár, L Maertens, B Ampe, J Buyse, J Zoons, E Delezie
Different ratios of fine- (FL) and coarse limestone (CL) were compared (50FL:50CL, 30FL:70CL, 0FL:100CL) in conventional (C) and split feeding (S) for their effects on performance, egg quality traits, and bone quality of old, brown laying hens (72 to 83 wk). Each treatment consisted of 42 hens (7 hens × 6 replicates). In the C system diets supplemented with limestone were provided during the whole day, whereas in the S system a morning diet was fed without added limestone, and only the afternoon diet was supplemented with different limestone ratios...
December 5, 2016: Poultry Science
https://www.readbyqxmd.com/read/27919710/the-transcription-factor-carbohydrate-response-element-binding-protein-chrebp-a-possible-link-between-metabolic-disease-and-cancer
#7
REVIEW
Katsumi Iizuka
Carbohydrate-response element-binding protein (ChREBP) has been identified as a transcription factor that binds to carbohydrate response element in the promoter of pyruvate kinase, liver and red blood cells. ChREBP is activated by metabolites derived from glucose and suppressed by adenosine monophosphate (AMP), ketone bodies and cyclic cAMP. ChREBP regulates gene transcription related to glucose and lipid metabolism. Findings from knockout mice and human subjects suggest that ChREBP helps to induce hepatic steatosis, dyslipidemia, and glucose intolerance...
December 2, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27919304/green-tea-extract-intake-during-lactation-modified-cardiac-macrophage-infiltration-and-amp-activated-protein-kinase-phosphorylation-in-weanling-rats-from-undernourished-mother-during-gestation-and-lactation
#8
E Matsumoto, S Kataoka, Y Mukai, M Sato, S Sato
Maternal dietary restriction is often associated with cardiovascular disease in offspring. The aim of this study was to investigate the effect of green tea extract (GTE) intake during lactation on macrophage infiltration, and activation of adenosine monophosphate (AMP)-activated protein kinase (AMPK) and serine-threonine kinase Akt (Akt) in the hearts of weanlings exposed to maternal dietary protein restriction. Pregnant Wistar rats were fed control (C) or low-protein diets (LP) throughout gestation. Following delivery, the dams received a control or a GTE-containing control diet during lactation: control diet during gestation and lactation (CC), low-protein diet during gestation and lactation (LPC), low-protein diet during gestation and 0...
December 6, 2016: Journal of Developmental Origins of Health and Disease
https://www.readbyqxmd.com/read/27919208/is-metformin-a-therapeutic-paradigm-for-colorectal-cancer-insight-into-the-molecular-pathway
#9
Zar Chii Thent, Nurul Hannim Zaidun, Fairuz Azmi, Mu Izuddin Senin, Haszianaliza Haslan, Ahmad Ruzain Salehuddin
Colorectal cancer (CRC) remains one of the major leading causes of cancer related morbidity and mortality. Apart from the conventional anti-neoplastic agents, metformin, a biguanide anti-diabetic agent, has recently found to have anti-cancer property. Several studies observed the effect of metformin towards its anti-cancer effect on colon or colorectal cancer in diabetic patients. However, only a few studies showed its effect on colorectal cancer in relation to the non-diabetic status. The present review aimed to highlight the insight into the molecular pathway of metformin towards colorectal cancer in the absence of diabetes mellitus...
December 5, 2016: Current Drug Targets
https://www.readbyqxmd.com/read/27919027/phosphorylation-of-janus-kinase-1-jak1-by-amp-activated-protein-kinase-ampk-links-energy-sensing-to-anti-inflammatory-signaling
#10
Claire Rutherford, Claire Speirs, Jamie J L Williams, Marie-Ann Ewart, Sarah J Mancini, Simon A Hawley, Christian Delles, Benoit Viollet, Ana P Costa-Pereira, George S Baillie, Ian P Salt, Timothy M Palmer
Adenosine 5'-monophosphate-activated protein kinase (AMPK) is a pivotal regulator of metabolism at cellular and organismal levels. AMPK also suppresses inflammation. We found that pharmacological activation of AMPK rapidly inhibited the Janus kinase (JAK)-signal transducer and activator of transcription (STAT) pathway in various cells. In vitro kinase assays revealed that AMPK directly phosphorylated two residues (Ser(515) and Ser(518)) within the Src homology 2 domain of JAK1. Activation of AMPK enhanced the interaction between JAK1 and 14-3-3 proteins in cultured vascular endothelial cells and fibroblasts, an effect that required the presence of Ser(515) and Ser(518) and was abolished in cells lacking AMPK catalytic subunits...
November 8, 2016: Science Signaling
https://www.readbyqxmd.com/read/27918543/ficd-acts-bifunctionally-to-ampylate-and-de-ampylate-the-endoplasmic-reticulum-chaperone-bip
#11
Steffen Preissler, Claudia Rato, Luke A Perera, Vladimir Saudek, David Ron
Protein folding homeostasis in the endoplasmic reticulum (ER) is defended by an unfolded protein response that matches ER chaperone capacity to the burden of unfolded proteins. As levels of unfolded proteins decline, a metazoan-specific FIC-domain-containing ER-localized enzyme (FICD) rapidly inactivates the major ER chaperone BiP by AMPylating T518. Here we show that the single catalytic domain of FICD can also release the attached AMP, restoring functionality to BiP. Consistent with a role for endogenous FICD in de-AMPylating BiP, FICD(-/-) hamster cells are hypersensitive to introduction of a constitutively AMPylating, de-AMPylation-defective mutant FICD...
December 5, 2016: Nature Structural & Molecular Biology
https://www.readbyqxmd.com/read/27918207/gemigliptin-ameliorates-western-diet-induced-metabolic-syndrome-in-mice
#12
Seung Hee Choi, Jaechan Leem, Sungmi Park, Chong-Kee Lee, Keun-Gyu Park, In-Kyu Lee
Dipeptidyl peptidase 4 (DPP-4) inhibitors are widely used antihyperglycemic agents for type 2 diabetes mellitus. Recently, increasing attention has been focused on the pleiotropic actions of DPP-4 inhibitors. The aim of the present study was to examine whether gemigliptin, a recently developed DPP-4 inhibitor, could ameliorate features of metabolic syndrome. Mice were fed a Western diet (WD) for 12 weeks and were subsequently divided into 2 groups: mice fed a WD diet alone or mice fed a WD diet supplemented with gemigliptin for an additional 4 weeks...
September 4, 2016: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/27917887/13-methylberberine-a-berberine-analogue-with-stronger-anti-adipogenic-effects-on-mouse-3t3-l1-cells
#13
Yit-Lai Chow, Mami Sogame, Fumihiko Sato
Lipid metabolism modulation is a main focus of metabolic syndrome research, an area in which many natural and synthetic chemicals are constantly being screened for in vitro and in vivo activity. Berberine, a benzylisoquinoline plant alkaloid, has been extensively investigated for its anti-obesity effects and as a potential cholesterol and triglyceride-lowering drug. We screened 11 protoberberine and 2 benzophenanthridine alkaloids for their anti-adipogenic effects on 3T3-L1 adipocytes and found that 13-methylberberine exhibited the most potent activity...
December 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27917698/tetramethylpyrazine-protects-against-glucocorticoid-induced-apoptosis-by-promoting-autophagy-in-mesenchymal-stem-cells-and-improves-bone-mass-in-glucocorticoid-induced-osteoporosis-rats
#14
Long Wang, Hong-Yang Zhang, Bo Gao, Jun Shi, Qiang Huang, Yue-Hu Han, Ya-Qian Hu, Wei-Guang Lu, Zhuo-Jie Zhao, Bao-Hua Liu, Qiang Jie, Liu Yang, Zhuo-Jing Luo
Glucocorticoid-induced osteoporosis (GIOP) is a widespread clinical complication due to the common use of glucocorticoids. Excess glucocorticoids induce apoptosis of bone marrow-derived mesenchymal stem cells (BMSCs), which have been shown to play an increasingly important role in the pathogenesis and therapy of osteoporosis. Tetramethylpyrazine (TMP), an extract from one of the most recognized herbs in traditional Chinese medicine (Chuanxiong), has been reported to have anti-apoptotic properties. In this study, we tested whether TMP protects rat BMSCs following exposure to glucocorticoids in vitro and in vivo...
December 4, 2016: Stem Cells and Development
https://www.readbyqxmd.com/read/27917474/germacrone-inhibits-adipogenesis-and-stimulates-lipolysis-via-the-amp-activated-protein-kinase-signalling-pathway-in-3t3-l1-preadipocytes
#15
Yuan-Ri Guo, Se-Young Choung
OBJECTIVES: In a previous study, we reported that Aster spathulifolius Maxim extract (ASE) inhibited lipid accumulation and adipocyte differentiation in 3T3-L1 cells. Of the components in ASE, germacrone (GM) was identified as a potent bioactive constituent. GM is known for its anticancer and antiviral activity. However, the effects of GM and the molecular mechanism by which GM regulates adipogenesis and lipolysis were not reported. Therefore, we investigated the effect of GM on adipogenesis and lipolysis and to elucidate its underlying molecular mechanism...
December 5, 2016: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/27917448/lithium-reversibly-inhibits-schwann-cell-proliferation-and-differentiation-without-inducing-myelin-loss
#16
Gonzalo Piñero, Randall Berg, Natalia Denise Andersen, Patricia Setton-Avruj, Paula Virginia Monje
This study was undertaken to examine the bioactivity, specificity, and reversibility of lithium's action on the growth, survival, proliferation, and differentiation of cultured Schwann cells (SCs). In isolated SCs, lithium promoted a state of cell cycle arrest that featured extensive cell enlargement and c-Jun downregulation in the absence of increased expression of myelin-associated markers. In addition, lithium effectively prevented mitogen-induced S-phase entry without impairing cell viability. When lithium was administered together with differentiating concentrations of cyclic adenosine monophosphate (cAMP) analogs, a dramatic inhibition of the expression of the master regulator of myelination Krox-20 was observed...
December 5, 2016: Molecular Neurobiology
https://www.readbyqxmd.com/read/27917437/nicotine-plus-a-high-fat-diet-triggers-cardiomyocyte-apoptosis
#17
Indrani Sinha-Hikim, Theodore C Friedman, Mark Falz, Victor Chalfant, Mohammad Kamrul Hasan, Jorge Espinoza-Derout, Desean L Lee, Carl Sims, Peter Tran, Sushil K Mahata, Amiya P Sinha-Hikim
Cigarette smoking is an important risk factor for diabetes, cardiovascular disease and non-alcoholic fatty liver disease. The health risk associated with smoking can be aggravated by obesity. Smoking might also trigger cardiomyocyte (CM) apoptosis. Given that CM apoptosis has been implicated as a potential mechanism in the development of cardiomyopathy and heart failure, we characterize the key signaling pathways in nicotine plus high-fat diet (HFD)-induced CM apoptosis. Adult C57BL6 male mice were fed a normal diet (ND) or HFD and received twice-daily intraperitoneal (IP) injections of nicotine (0...
December 5, 2016: Cell and Tissue Research
https://www.readbyqxmd.com/read/27917162/activity-of-scorpion-venom-derived-antifungal-peptides-against-planktonic-cells-of-candida-spp-and-cryptococcus-neoformans-and-candida-albicans-biofilms
#18
Fernanda Guilhelmelli, Nathália Vilela, Karina S Smidt, Marco A de Oliveira, Alice da Cunha Morales Álvares, Maria C L Rigonatto, Pedro H da Silva Costa, Aldo H Tavares, Sônia M de Freitas, André M Nicola, Octávio L Franco, Lorena da Silveira Derengowski, Elisabeth F Schwartz, Márcia R Mortari, Anamélia L Bocca, Patrícia Albuquerque, Ildinete Silva-Pereira
The incidence of fungal infections has been increasing in the last decades, while the number of available antifungal classes remains the same. The natural and acquired resistance of some fungal species to available therapies, associated with the high toxicity of these drugs on the present scenario and makes an imperative of the search for new, more efficient and less toxic therapeutic choices. Antimicrobial peptides (AMPs) are a potential class of antimicrobial drugs consisting of evolutionarily conserved multifunctional molecules with both microbicidal and immunomodulatory properties being part of the innate immune response of diverse organisms...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27916832/anthropometric-measurements-serum-reproductive-hormonal-levels-and-sexual-development-among-boys-in-the-rural-western-cape-south-africa
#19
Jun Mao, Mohamed Aqiel Dalvie
Data on growth and sexual maturation among boys from the rural Western Cape in South Africa is limited. A cross-sectional study of 269 school boys was conducted testing for serum luteinizing hormone (LH), follicle stimulating hormone (FSH), testosterone, sex hormone binding globulin (SHBG) and estradiol (E2); height, weight and body mass index (BMI); sexual maturity (using Tanner Stages) and a questionnaire (demographic and medical history). The median age at pubertal onset (Tanner Stage 2) and Tanner Stage 5 was 11...
November 29, 2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/27916511/liqustri-lucidi-fructus-inhibits-hepatic-injury-and-functions-as-an-antioxidant-by-activation-of-amp-activated-protein-kinase-in-vivo-and-in-vitro
#20
Hye Lim Seo, Su Youn Baek, Eun Hye Lee, Ju-Hee Lee, Seul-Gi Lee, Kwang-Youn Kim, Mi Hee Jang, Min-Hui Park, Joung-Hee Kim, Keun-Jun Kim, Hyeong Sik Lee, Soon-Cheol Ahn, Jong Rok Lee, Sook Jahr Park, Sang Chan Kim, Young Woo Kim
Medicinal herbs are used to treat or prevent various diseases, and function to regulate protective mechanisms as nutraceuticals. Fructus Ligustri lucidi is the fruit of Ligustrum lucidum and has been used for its tonic effects on the liver. This study was designed to examine the effects of Fructus Ligustri lucidi water extract (FLL) against severe oxidative stress and mitochondrial impairment in vivo and in vitro and to elucidate its cellular mechanisms of action. Treatment of HepG2 cells with arachidonic acid (AA) + iron successfully induced oxidative stress and apoptosis, as indicated by depletion of glutathione, formation of ROS, increases in mitochondrial membrane permeability (MMP), and altered expression of apoptosis-related proteins, such as procaspase-3 and Bcl-xL...
December 1, 2016: Chemico-biological Interactions
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