Abstract:
:The mechanisms controlling ATP generation in the transition from normal resting conditions to either high work states or ischemia are poorly understood. ATP generation depends upon compartmentation between the mitochondria and cytosol of metabolic pathways and key energy transfer species that cannot be easily assessed experimentally. We developed a multicompartment mathematical model of cardiac metabolism to simulate the metabolic responses to ischemia and increased workload. The model is based on mass balances, transport, and metabolic processes in cardiac tissue, and has three distinct compartments (blood, cytosol, and mitochondria). In addition to distinguishing between cytosol and mitochondria, the model includes a cytosolic subcompartment for glycolytic metabolic channeling. The model simulations predict the rapid activation of glycogenolysis and lactate production at the onset of ischemia, and support the concept of localization of glycolysis to a cytosolic subcompartment. In addition, simulations show that mitochondrial NADH/NAD(+) is primarily determined by oxygen consumption during ischemia, while cytosolic NADH/NAD(+) and lactate production are largely a function of glycolytic flux during the initial phase, and is controlled by mitochondrial NADH/NAD(+) and the malate-aspartate shuttle during the steady state. Finally, the model predicts that metabolic activation with an abrupt increase in workload requires parallel activation of ATP hydrolysis, glycolysis, mitochondrial dehydrogenases, the electron transport chain, and ADP phosphorylation. Taken together, these studies demonstrate the importance of metabolic compartmentation in the regulation of cardiac energetics in response to acute stress, and they highlight the usefulness of computational models in this line of investigation.
journal_name
Ann N Y Acad Scijournal_title
Annals of the New York Academy of Sciencesauthors
Zhou L,Yu X,Cabrera ME,Stanley WCdoi
10.1196/annals.1380.012subject
Has Abstractpub_date
2006-10-01 00:00:00pages
120-39eissn
0077-8923issn
1749-6632pii
1080/1/120journal_volume
1080pub_type
杂志文章,评审abstract::Three propellant chlorofluorocarbons, namely trichlorofluoromethane (FC11), dichlorodifluoromethane (FC12), and chlorodifluoromethane (FC22) were administered by inhalation at a concentration of 5000, 1000 and 0 ppm, 4 hours daily, 5 days weekly, for 104 and 78 weeks, to rats and mice, respectively. The animals were k...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1111/j.1749-6632.1988.tb30116.x
更新日期:1988-01-01 00:00:00
abstract::Disorders of sexual differentiation (DSDs) presenting during adolescence are discussed, and molecular explanations are given for some. DSD conditions are often discovered during early adolescence, an age well known to predispose to high risk for adjustment problems. Presentation may be with lack of or minimal pubertal...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
doi:10.1196/annals.1429.028
更新日期:2008-01-01 00:00:00
abstract::Accumulating epidemiological, clinical, and experimental evidence supports the conclusion of a critical role of epigenetic factors in immune programming. This understanding provides the basis for elucidating how the intricate interactions of the genome, epigenome, and transcriptome shape immune responses and maintain ...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
doi:10.1111/j.1749-6632.2010.05831.x
更新日期:2011-01-01 00:00:00
abstract::Augmentation of proteasome machinery is emerging as a significant gerontomodulatory consequence of hormetic stimulation, such as mild heat stress. This study describes the phenomenon we term hormetic proteasomal oscillation, wherein mildly heat-stressed human fibroblasts (41 degrees C, 1 h) display an adaptation respo...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1196/annals.1354.028
更新日期:2006-05-01 00:00:00
abstract::Evolutionary psychology seeks to understand the functional design underlying psychological processes and behavior. Theories of selection pressures developed within evolutionary biology are key components of this understanding. Because past selection pressures responsible for current design cannot be directly observed,...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1111/j.1749-6632.2000.tb06615.x
更新日期:2000-04-01 00:00:00
abstract::Although very few measurements have appeared in the open literature and there seems to be a controversy about the existence of the NDR phenomenon in molecules, the prospects of building such systems have attracted significant attention. In the work reported in this paper we used a model based on DFT calculations of th...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1196/annals.1292.004
更新日期:2003-12-01 00:00:00
abstract::Although alloxan-resistant (ALR) mice share 70% of the NOD genome, ALR islets are remarkably resistant to oxidative stress and autoimmunity. Using 2D PAGE comparative analysis, we have characterized 55 proteins that are differentially expressed between the NOD and ALR islet proteome. Ten proteins were found to be high...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1196/annals.1447.002
更新日期:2008-12-01 00:00:00
abstract::Sphingosine 1-phosphate (S1P) is an ubiquitously present extracellular lipid mediator that is released by several cell types, particularly by activated platelets. The effects of S1P are mediated by a specific family of G protein-coupled sphingosine 1-phosphate receptors (S1P1-S1P5). We demonstrate that S1P acts on hem...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
doi:10.1196/annals.1349.011
更新日期:2005-06-01 00:00:00
abstract::This paper reports preliminary results for pool film boiling on a wire immersed in almost saturated FC72 recently obtained during an experimental campaign performed in low gravity on the European Space Agency Zero-G airplane, (reduced gravity level 10(-2)). This is part of a long-term research program on the effect of...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1111/j.1749-6632.2002.tb05923.x
更新日期:2002-10-01 00:00:00
abstract::Insulin-like growth factor-I (IGF-I) and IGF-I receptor (IGF-IR), despite their well-known roles in cell survival and proliferation, can also weakly enhance apoptosis. To study the relationships between the IGF-IR and Bax as well as Bak, 144 cases of colorectal cancer were examined by immunohistochemistry, using the a...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1196/annals.1329.047
更新日期:2004-12-01 00:00:00
abstract::T1DM is a disease that affects pancreatic beta cells and results in severe insulin depletion. T1DM is a multigenic disease, and the strongest genetic association with this disease is shown by the genes in MHC class II, namely, DQA1 and DQB1. The other gene that has been implicated in susceptibility to T1DM is the MICA...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1196/annals.1337.025
更新日期:2004-12-01 00:00:00
abstract::As the second synapse in the central gustatory pathway of the rodent, the parabrachial nucleus of the pons (PbN) receives information about taste stimuli directly from the nucleus of the solitary tract (NTS). Data show that NTS cells amplify taste responses before transmitting taste-related signals to the PbN. NTS cel...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1111/j.1749-6632.2009.03903.x
更新日期:2009-07-01 00:00:00
abstract::The neuroprotective action of l-carnitine (LC) in the rat model of 3-nitropropionic acid (3-NPA)-induced mitochondrial dysfunction was examined. 3-NPA is known to produce decreases in neuronal ATP levels via inhibition of the succinate dehydrogenase (SDH) at complex II of the mitochondrial electron transport chain. SD...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1111/j.1749-6632.2003.tb07536.x
更新日期:2003-05-01 00:00:00
abstract::Ticks do not usually infest sympatric hosts species according to their availability in a given environment, and it has been suggested that habitat use by hosts is a major determinant of tick burdens. The knowledge of such infestation patterns and their relationship with host habitat use is important for the control of...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1111/j.1749-6632.2002.tb04397.x
更新日期:2002-10-01 00:00:00
abstract::Melatonin is a hormone secreted by the pineal gland, mostly in the dark period of the light/dark cycle, with corresponding fluctuations reflected in the plasma melatonin levels. This hormone plays a critical role in the regulation of various neural and endocrine processes that are synchronized with daily change in pho...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
doi:10.1196/annals.1332.014
更新日期:2004-12-01 00:00:00
abstract::The action of a medicinal spray that contains anti-inflammatory and bacterio-static drugs integrated with the penetrating and potentiating agent DMSO has been evaluated clinically in 60 infants with acute respiratory obstruction. A dose of 2 ml of this spray is applied in the posterior pharynx and the tonsil region; 1...
journal_title:Annals of the New York Academy of Sciences
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1111/j.1749-6632.1975.tb25388.x
更新日期:1975-01-27 00:00:00
abstract::In Wegener's granulomatosis (WG), antiproteinase 3 (PR3) autoantibodies (PR3-ANCA) are crucial in the development of generalized vasculitis. Wegener's pathognomonic lesion, a granulomatous inflammation of the upper and lower respiratory tract, contains abundant lymphocytes and macrophages. Lymphocyte clusters in germi...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
doi:10.1196/annals.1361.042
更新日期:2005-06-01 00:00:00
abstract::Although stress is tightly connected with elevated levels of catecholamines, stress effects on target structures of catecholamine action--adrenoceptors (ARs)--has not been deeply studied yet. Similarly, very little is known about changes of muscarinic receptors (MRs) during stress. We determined changes in these recep...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1196/annals.1410.028
更新日期:2008-12-01 00:00:00
abstract::The in vitro lethal activity of two Bacillus thuringiensis strains (IB-16 and IB-61) against Haemonchus contortus histotropic fourth stage larvae (L(4)) was evaluated. Each B. thuringiensis strain was used as soluble proteins at different concentrations. In addition, the in vitro lethal dose (LD(50)) of each strain wa...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1196/annals.1428.077
更新日期:2008-12-01 00:00:00
abstract::The observation that murine B-cell populations can contain relatively large numbers of cells that produce IgM with the ability to lyse bromelain-treated mouse erythrocytes (BrMRBC), but not normal untreated MRBC, was made nearly 20 years ago. The major observations regarding the antigen specificity, the cells that pro...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1111/j.1749-6632.1992.tb24635.x
更新日期:1992-05-04 00:00:00
abstract::The pronounced increases in gangliosides belonging to the gangliotetraose family during the neurite outgrowth phase of neuronal differentiation have suggested a functional requirement for these substances related to process extension, arborization, and possibly synaptogenesis. Support for this hypothesis has come from...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
doi:10.1111/j.1749-6632.1998.tb09669.x
更新日期:1998-06-19 00:00:00
abstract::We have successfully expressed the active tyrosinase of Streptomyces antibioticus in Escherichia coli under the control of the trp promoter by fusing the sequence to the ORF438 gene. Because our attempt to connect the polycistronic gene of ORF438 and tyrosinase directly to the trp promoter of E. coli resulted in the e...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1111/j.1749-6632.1994.tb47374.x
更新日期:1994-05-02 00:00:00
abstract::Image processing in fluid mechanics has become an important quantitative tool for flow analysis. The feasibility of simultaneous measurements of instantaneous velocity and temperature fields, as well as for tracking interfaces, creates a functional tool to describe thermally driven flows accompanied by phase change. T...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1111/j.1749-6632.2002.tb04575.x
更新日期:2002-10-01 00:00:00
abstract::The entry of resting T cells into the G1 phase of the cell cycle after stimulation by mitogens is controlled by a series of biochemical events that are independent of growth factors. These events follow the initial signals stimulated through the engagement of the T-cell receptor and include activation of the cyclin-de...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1111/j.1749-6632.1995.tb26657.x
更新日期:1995-09-07 00:00:00
abstract::Development of tick vaccines provides new opportunities for control of tick infestations and tick-borne diseases. Recently, the tick-protective protein, subolesin, was identified in a cell line derived from Ixodes scapularis by expression library immunization and a mouse model of tick infestations. While subolesin was...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1196/annals.1428.058
更新日期:2008-12-01 00:00:00
abstract::Lewisite and many other similar arsenicals are warfare vesicants developed and weaponized for use in World Wars I and II. These chemicals, when exposed to the skin and other epithelial tissues, cause rapid severe inflammation and systemic damage. Here, we show that topically applied arsenicals in a murine model produc...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1111/nyas.14475
更新日期:2020-11-01 00:00:00
abstract::Pheochromocytoma is a rare, surgically correctable cause of hypertension. Modern medical blockade has significantly improved patient survival and morbidity. The last decade has seen the identification of the genes responsible for several hereditary causes of pheochromocytoma. Evaluation of these patients has demonstra...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
doi:10.1111/j.1749-6632.2002.tb04411.x
更新日期:2002-09-01 00:00:00
abstract::Nocturnal cortisol release in humans is synergistically regulated by circadian rhythm and sleep. Cortisol concentrations typically reach a nadir during the slow wave sleep-rich periods of early nocturnal sleep, whereas during the late night, when rapid eye movement (REM) sleep predominates, cortisol levels are enhance...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
doi:10.1196/annals.1314.020
更新日期:2004-12-01 00:00:00
abstract::Inflammasomes continue to generate interest in an increasing number of disciplines owing to their unique ability to integrate a myriad of signals from pathogen- and damage-associated molecular patterns into a proinflammatory response. This potent caspase-1-dependent process is capable of activating the innate immune s...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
doi:10.1111/nyas.12458
更新日期:2014-06-01 00:00:00
abstract::The recent identification of lymphatic endothelial cell-specific markers and the generation of mouse models harboring mutations in many genes that encode those markers have enabled us to begin to elucidate the developmental steps that go toward establishing the lymphatic vasculature network. Understanding these basic ...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
doi:10.1196/annals.1413.006
更新日期:2008-01-01 00:00:00