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https://www.readbyqxmd.com/read/28433571/antitumor-and-chemosensitizing-action-of-3-bromopyruvate-implication-of-deregulated-metabolism
#1
Saveg Yadav, Shrish Kumar Pandey, Ajay Kumar, Praveen Kumar Kujur, Rana Pratap Singh, Sukh Mahendra Singh
3-Bromopyruvate (3-BP), brominated derivative of pyruvate, possesses strong antitumor potential, owing to its ability to inhibit multiple target molecules crucial for survival of neoplastic cells. Although, 3-BP displays cytotoxicity against a wide variety of tumors, there is no report with respect to malignancies of thymic origin. Therefore, we investigated its antineoplastic action in vitro against tumor cells of a murine transplantable lymphoma of thymoma origin, designated as Dalton's lymphoma (DL). 3-BP treatment of tumor cells inhibited metabolism and survival with augmented induction of apoptosis and necrosis...
April 19, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28414271/monitoring-atp-dynamics-in-electrically-active-white-matter-tracts
#2
Andrea Trevisiol, Aiman S Saab, Ulrike Winkler, Grit Marx, Hiromi Imamura, Wiebke Möbius, Kathrin Kusch, Klaus-Armin Nave, Johannes Hirrlinger
In several neurodegenerative diseases and myelin disorders, the degeneration profiles of myelinated axons are compatible with underlying energy deficits. However, it is presently impossible to measure selectively axonal ATP levels in the electrically active nervous system. We combined transgenic expression of an ATP-sensor in neurons of mice with confocal FRET imaging and electrophysiological recordings of acutely isolated optic nerves. This allowed us to monitor dynamic changes and activity-dependent axonal ATP homeostasis at the cellular level and in real time...
April 17, 2017: ELife
https://www.readbyqxmd.com/read/28411128/the-effects-of-experimental-gestational-hypertension-on-maternal-blood-pressure-and-fluid-intake-and-pre-weanling-hypothalamic-neuronal-activity
#3
Juan Arguelles, Carmen Perillan, Terry G Beltz, Baojian Xue, Daniel Badaue-Passos, Jose A Vega, Alan Kim Johnson
To examine the fetal programming effects of maternal hypertension, natriophilia and hyperreninemia [experimentally induced in rats by partial inter-renal aortic ligature (PAL) prior to mating] fos immunoreactivity was studied in 6-day-old offspring of PAL and control mothers. The purposes of the present set of experiments were twofold. The first was to characterize the effects of PAL on the mother's arterial blood pressure and intake of salt (1.8% NaCl solution) and water over the course of gestation. Second, was to study the pattern of neuronal activation in key brain areas of 6-day-old offspring treated with the dipsogen isoproterenol that were from PAL and control mothers...
April 11, 2017: Appetite
https://www.readbyqxmd.com/read/28411114/circulating-biologically-active-adrenomedullin-bio-adm-predicts-hemodynamic-support-requirement-and-mortality-during-sepsis
#4
Pietro Caironi, Roberto Latini, Joachim Struck, Oliver Hartmann, Andreas Bergmann, Giuseppe Maggio, Marco Cavana, Gianni Tognoni, Antonio Pesenti, Luciano Gattinoni, Serge Masson
BACKGROUND: The biological role of adrenomedullin, a hormone involved in hemodynamic homeostasis, is controversial in sepsis, since administration of either the peptide or an antibody against it may be beneficial. METHODS: Plasma bio-ADM was assessed on days 1, 2 and 7 after randomization of 956 patients with sepsis or septic shock to albumin or crystalloids for fluid resuscitation in the multicenter Albumin Italian Outcome Sepsis (ALBIOS) trial. We tested the association of bio-ADM and its time-dependent variation with fluid therapy, vasopressor administration, organ failures and mortality...
April 11, 2017: Chest
https://www.readbyqxmd.com/read/28409226/daily-thermal-fluctuations-to-a-range-of-subzero-temperatures-enhance-cold-hardiness-of-winter-acclimated-turtles
#5
James M Wiebler, Manisha Kumar, Timothy J Muir
Although seasonal increases in cold hardiness are well documented for temperate and polar ectotherms, relatively little is known about supplemental increases in cold hardiness during winter. Because many animals are exposed to considerable thermal variation in winter, they may benefit from a quick enhancement of cold tolerance prior to extreme low temperature. Hatchling painted turtles (Chrysemys picta) overwintering in their natal nests experience substantial thermal variation in winter, and recently, it was found that brief subzero chilling of winter-acclimated hatchlings decreases subsequent chilling-induced mortality, increases blood concentrations of glucose and lactate, and protects the brain from cryoinjury...
April 13, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28392701/evaluation-of-the-clinical-effect-of-small-volume-resuscitation-on-uncontrolled-hemorrhagic-shock-in-emergency
#6
Gang Zhao, Wei Wu, Qi-Ming Feng, Jian Sun
OBJECTIVE: The objective of the present study was to explore the resuscitative effect of small-volume resuscitation on uncontrolled hemorrhagic shock in emergency. METHODS: In this study, the resuscitative effects in 200 trauma patients with uncontrolled hemorrhagic shock in emergency were studied. Half of these patients were infused with hypertonic/hyperoncotic fluid (small-volume resuscitation group, n=100), whereas the rest were infused with Hespan and lactated Ringer's solution (conventional fluid resuscitation group, n=100)...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/28383716/essential-role-for-non-canonical-poly-a-polymerase-gld4-in-cytoplasmic-polyadenylation-and-carbohydrate-metabolism
#7
Jihae Shin, Ki Young Paek, Maria Ivshina, Emily E Stackpole, Joel D Richter
Regulation of gene expression at the level of cytoplasmic polyadenylation is important for many biological phenomena including cell cycle progression, mitochondrial respiration, and learning and memory. GLD4 is one of the non-canonical poly(A) polymerases that regulates cytoplasmic polyadenylation-induced translation, but its target mRNAs and role in cellular physiology is not well known. To assess the full panoply of mRNAs whose polyadenylation is controlled by GLD4, we performed an unbiased whole genome-wide screen using poy(U) chromatography and thermal elution...
April 5, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28382025/starter-feeding-supplementation-alters-colonic-mucosal-bacterial-communities-and-modulates-mucosal-immune-homeostasis-in-newborn-lambs
#8
Junhua Liu, Gaorui Bian, Daming Sun, Weiyun Zhu, Shengyong Mao
This study aims to investigate the effect of starter feeding supplementation on colonic mucosal bacterial communities and on mucosal immune homeostasis in pre-weaned lambs. We selected eight pairs of 10-day-old lamb twins. One twin was fed breast milk (M, n = 8), while the other was fed breast milk plus starter (M+S, n = 8). The lambs were sacrificed at 56 days age. Colonic content was collected to determine the pH and the concentrations of volatile fatty acids (VFA) and lactate. The colonic mucosa was harvested to characterize the bacterial communities using Illumina MiSeq sequencing and to determine mRNA expression levels of cytokines and toll-like receptors (TLR) using quantitative real-time PCR...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28378505/prolactin-receptors-in-rip-cre-cells-but-not-in-agrp-neurons-are-involved-in-energy-homeostasis
#9
S R Ladyman, M A MacLeod, Z Khant Aung, P Knowles, H R Phillipps, R S E Brown, D R Grattan
Among its many functions, prolactin has been implicated in energy homeostasis, particularly during pregnancy and lactation. The arcuate nucleus is a key site in the regulation of energy balance. The aim of this study was to examine whether arcuate nucleus neuronal populations involved in energy homeostasis are prolactin responsive and if they can mediate the effects of prolactin on energy homeostasis. To determine if Agrp neurons or Rip-Cre neurons are prolactin responsive, transgenic mice expressing the reporter td-tomato in Agrp neurons (td-tomato/AgRP-Cre) or Rip-Cre neurons (td-tomato/Rip-Cre) were treated with prolactin and perfused 45 minutes later...
April 4, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/28371083/animal-models-of-maternal-high-fat-diet-exposure-and-effects-on-metabolism-in-offspring-a-meta-regression-analysis
#10
REVIEW
G A Ribaroff, E Wastnedge, A J Drake, R M Sharpe, T J G Chambers
Animal models of maternal high fat diet (HFD) demonstrate perturbed offspring metabolism although the effects differ markedly between models. We assessed studies investigating metabolic parameters in the offspring of HFD fed mothers to identify factors explaining these inter-study differences. A total of 171 papers were identified, which provided data from 6047 offspring. Data were extracted regarding body weight, adiposity, glucose homeostasis and lipidaemia. Information regarding the macronutrient content of diet, species, time point of exposure and gestational weight gain were collected and utilized in meta-regression models to explore predictive factors...
March 30, 2017: Obesity Reviews: An Official Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28369926/uteroplacental-insufficiency-reduces-rat-plasma-leptin-concentrations-and-alters-placental-leptin-transporters-ameliorated-with-enhanced-milk-intake-and-nutrition
#11
Jessica F Briffa, Rachael O'Dowd, Karen M Moritz, Tania Romano, Lisa R Jedwab, Andrew J McAinch, Deanne H Hryciw, Mary E Wlodek
KEY POINTS: Uteroplacental insufficiency compromises maternal mammary development, milk production and pup organ development; this is ameliorated by cross-fostering, which improves pup growth and organ development and prevents adult diseases in growth-restricted (Restricted) offspring by enhancing postnatal nutrition. Leptin is transported to the fetus from the mother by the placenta; we report reduced plasma leptin concentrations in Restricted fetuses associated with sex-specific alterations in placental leptin transporter expression...
March 29, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28353361/enhancement-of-the-antitumor-effect-of-methotrexate-on-colorectal-cancer-cells-via-lactate-calcium-salt-targeting-methionine-metabolism
#12
Young-Kwon Jo, Min Hee Park, Hyunju Choi, HooKeun Lee, Jong-Moon Park, Jae Jun Sim, Chonghwan Chang, Keun-Yeong Jeong, Hwan Mook Kim
Methionine (Met) is involved in one-carbon de novo nucleotide synthesis and is an essential amino acid for cell survival. The impact of lactate calcium salt (CaLa) on the Met metabolism was investigated to evaluate the enhanced antitumor effect of methotrexate (MTX) on colorectal cancer (CRC) cells. Met dependency relating to homocysteine (Hcy) and betaine was investigated in human CRC cells (HCT-116 and HT-29) using a viability assay and liquid chromatography-mass spectrometry. Expression of betaine transporter-1 (BGT-1) following treatment with MTX alone or with CaLa was determined by Western blot...
March 29, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/28325783/renal-handling-of-ketones-in-response-to-sodium-glucose-cotransporter-2-inhibition-in-patients-with-type-2-diabetes
#13
Ele Ferrannini, Simona Baldi, Silvia Frascerra, Brenno Astiarraga, Elisabetta Barsotti, Aldo Clerico, Elza Muscelli
OBJECTIVE: Pharmacologically induced glycosuria elicits adaptive responses in glucose homeostasis and hormone release, including decrements in plasma glucose and insulin levels, increments in glucagon release, enhanced lipolysis, and stimulation of ketogenesis, resulting in an increase in ketonemia. We aimed at assessing the renal response to these changes. RESEARCH DESIGN AND METHODS: We measured fasting and postmeal urinary excretion of glucose, β-hydroxybutyrate (β-HB), lactate, and sodium in 66 previously reported patients with type 2 diabetes and preserved renal function (estimated glomerular filtration rate ≥60 mL · min(-1) · 1...
March 21, 2017: Diabetes Care
https://www.readbyqxmd.com/read/28323920/perinatal-exposure-to-low-dose-bisphenol-a-disrupts-the-structural-and-functional-development-of-the-hypothalamic-feeding-circuitry
#14
Harry MacKay, Zachary R Patterson, Alfonso Abizaid
Bisphenol-A (BPA) is a component of polycarbonate and other plastics to which humans are regularly exposed at low levels. BPA is characterized as an endocrine disruptor because of observations of its estrogenic activity in various experimental models. We have previously shown evidence of disrupted hypothalamic feeding circuitry and leptin sensitivity in adult BPA-exposed animals subjected to a high-fat diet, but because these animals were already exhibiting a diet-induced obese phenotype, we could not rule out the possibility that these observations were simply consequences of the obesity, not a preexisting phenotype produced by BPA exposure...
April 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28273069/interplay-between-metabolic-identities-in-the-intestinal-crypt-supports-stem-cell-function
#15
Maria J Rodríguez-Colman, Matthias Schewe, Maaike Meerlo, Edwin Stigter, Johan Gerrits, Mia Pras-Raves, Andrea Sacchetti, Marten Hornsveld, Koen C Oost, Hugo J Snippert, Nanda Verhoeven-Duif, Riccardo Fodde, Boudewijn M T Burgering
The small intestinal epithelium self-renews every four or five days. Intestinal stem cells (Lgr5(+) crypt base columnar cells (CBCs)) sustain this renewal and reside between terminally differentiated Paneth cells at the bottom of the intestinal crypt. Whereas the signalling requirements for maintaining stem cell function and crypt homeostasis have been well studied, little is known about how metabolism contributes to epithelial homeostasis. Here we show that freshly isolated Lgr5(+) CBCs and Paneth cells from the mouse small intestine display different metabolic programs...
March 8, 2017: Nature
https://www.readbyqxmd.com/read/28259993/glycometabolic-adaptation-mediates-the-insensitivity-of-drug-resistant-k562-adm-leukaemia-cells-to-adriamycin-via-the-akt-mtor-c-myc-signalling-pathway
#16
Xueyan Zhang, Ziying Ai, Jing Chen, Juan Yi, Zhuan Liu, Huaishun Zhao, Hulai Wei
In human leukaemia, resistance to chemotherapy leads to treatment ineffectiveness or failure. Previous studies have indicated that cancers with increased levels of aerobic glycolysis are insensitive to numerous forms of chemotherapy and respond poorly to radiotherapy. Whether glycolysis serves a key role in drug resistance of leukaemia cells remains unclear. The present study systematically investigated aerobic glycolytic alterations and regulation in K562/adriamycin (ADM) multidrug‑resistant (MDR) and ADM‑sensitive K562 leukaemia cells in normoxia, and the association between drug resistance and improper glycometabolism...
April 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28251580/experimental-assessment-of-oxygen-homeostasis-during-acute-hemodilution-the-integrated-role-of-hemoglobin-concentration-and-blood-pressure
#17
Tiffanie Kei, Nikhil Mistry, Albert K Y Tsui, Elaine Liu, Stephen Rogers, Allan Doctor, David F Wilson, Jean-Francois Desjardins, Kim Connelly, C David Mazer, Gregory M T Hare
BACKGROUND: Low hemoglobin concentration (Hb) and low mean arterial blood pressure (MAP) impact outcomes in critically ill patients. We utilized an experimental model of "normotensive" vs. "hypotensive" acute hemodilutional anemia to test whether optimal tissue perfusion is dependent on both Hb and MAP during acute blood loss and fluid resuscitation, and to assess the value of direct measurements of the partial pressure of oxygen in tissue (PtO2). METHODS: Twenty-nine anesthetized rats underwent 40% isovolemic hemodilution (1:1) (or sham-hemodilution control, n = 4) with either hydroxyethyl starch (HES) (n = 14, normotensive anemia) or saline (n = 11, hypotensive anemia) to reach a target Hb value near 70 g/L...
December 2017: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/28243309/assessment-of-toxicity-and-beneficiary-effects-of-garcinia-pedunculata-on-the-hematological-biochemical-and-histological-homeostasis-in-rats
#18
Sudip Paul, Md Yousuf Ali, Nur-E-Noushin Rumpa, E M Tanvir, Md Sakib Hossen, Moumoni Saha, Nikhil Chandra Bhoumik, Siew Hua Gan, Md Ibrahim Khalil
This study was undertaken to investigate the toxicological profile of a methanolic extract of Garcinia pedunculata fruit in rats by conducting hematological, biochemical, and histopathological examinations. Long Evans rats were divided into four groups, each with 6 animals, and were treated with three oral doses (250, 500, and 1000 mg/kg) once daily for 21 days. The extract did not cause significant changes in body and relative organ weight, percent water content, or hematological parameters at any administered doses...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28242458/hepatotoxicity-and-metabolic-effects-of-cellular-extract-of-cyanobacterium-radiocystis-fernandoi-containing-microcystins-rr-and-yr-on-neotropical-fish-hoplias-malabaricus
#19
Marcelo Gustavo Paulino, Priscila Adriana Rossi, Francine Perri Venturini, Driele Tavares, Naiara Elisabete da Silva Souza, Marise Margareth Sakuragui, Gilberto Moraes, Ana Paula Terezan, João Batista Fernandes, Alessandra Giani, Marisa Narciso Fernandes
The toxicological effect of cellular extract of cyanobacterium Radiocystis fernandoi strain R28 containing RR and YR microcystins was analyzed in the fish Hoplias malabaricus with emphasis on the liver structure and energetic metabolism, after short-term exposure. Fish were intraperitoneally (i.p.) injected with 100 μg of equivalent MC-LR kg(-1) body mass containing in the cellular extract of R. fernandoi strain R28. Twelve and 96 h post-injection, the plasma, liver and white muscle were sampled for biochemical analyses and liver was also sampled for morphological analyses...
May 2017: Chemosphere
https://www.readbyqxmd.com/read/28239403/lipid-overload-during-gestation-and-lactation-can-independently-alter-lipid-homeostasis-in-offspring-and-promote-metabolic-impairment-after-new-challenge-to-high-fat-diet
#20
Laís Angélica de Paula Simino, Thaís de Fante, Marina Figueiredo Fontana, Fernanda Oliveira Borges, Márcio Alberto Torsoni, Marciane Milanski, Lício Augusto Velloso, Adriana Souza Torsoni
BACKGROUND: Nutritional status in early life is critically involved in the metabolic phenotype of offspring. However the changes triggered by maternal consumption of high-fat diet (HFD) in pre- or postnatal period should be better understood. Here we evaluated whether maternal HFD consumption during gestation and lactation could differently affect liver miR-122 and miR-370 expression leading to metabolic damages observed in offspring. Moreover, we investigate whether early overnutrition program offspring to more harmful response to HFD in later life...
2017: Nutrition & Metabolism
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