نتایج جستجو برای: anoxia

تعداد نتایج: 6514  

2002
Marcelo Hermes-Lima Janet M. Storey Kenneth B. Storey

1. Free radicals, antioxidant enzymes and oxidative stress 2. Natural anoxia tolerance and adaptations to oxidative stress 2.1. Antioxidants and garter snakes under anoxia exposure 2.2. Antioxidants and leopard frogs under anoxia and reoxygenation 2.3. Antioxidants and goldfish under anoxia and reoxygenation 2.4. Antioxidants and turtles under anoxia and reoxygenation 2.5. Lipid peroxidation, x...

Journal: :Neuroscience 2015
M M Stecker M R Stevenson

Hyperglycemia accentuates the injury produced by anoxia both in the central and peripheral nervous system. To understand whether this is a consequence of changes in metabolic pathways produced by anoxia, the effect of the metabolic substrate used by the rat peripheral nerve on the nerve action potential (NAP) was studied in the presence and absence of anoxia. In the continuously oxygenated stat...

Journal: :Journal of experimental botany 2003
Takeshi Fukao Robert A Kennedy Yuji Yamasue Mary E Rumpho

To compare the regulation of anaerobic metabolism during germination in anoxia-tolerant and intolerant plants, enzymes associated with anaerobic metabolism such as sucrose synthase, aldolase, enolase, pyruvate decarboxylase (PDC), alcohol dehydrogenase (ADH), and aldehyde dehydrogenase (ALDH) were assayed in two varieties of Echinochloa crus-galli, formosensis (tolerant) and praticola (intolera...

Journal: :American journal of physiology. Regulatory, integrative and comparative physiology 2005
Jørund Sollid Aina Kjernsli Paula M De Angelis Asmund K Røhr Göran E Nilsson

Is DNA replication/cell proliferation in vertebrates possible during anoxia? The oxygen dependence of ribonucleotide reductase (RNR) could lead to a stop in DNA synthesis, thereby making anoxic DNA replication impossible. We have studied this question in an anoxia-tolerant vertebrate, the crucian carp (Carassius carassius), by examining 5'-bromo-2'-deoxyuridine incorporation and proliferating c...

1999
A. DIARRA C. SHELDON C. L. BRETT K. G. BAIMBRIDGE J. CHURCH

The ratiometric indicators 2 0,7 0-bis-(2-carboxyethyl)-5-(and-6)-carboxyfluorescein and Fura-2 were employed to examine, respectively, intracellular pH (pHi) and calcium ([Ca]i) changes evoked by anoxia in cultured postnatal rat hippocampal neurons at 378C. Under both HCO3 /CO2and HEPES-buffered conditions, 3-, 5or 10-min anoxia induced a triphasic change in pHi consisting of an initial fall i...

2001
Gabriel G. Haddad

Although we and others have previously shown that newborn central mammalian neurons are more tolerant to anoxia than their adult counterparts, we do not know whether neonatal nerve cells accumulate free cytosolic calcium (Cat+) less than adults in response to 0, deprivation. In order to determine whether anoxia increases Ca:+ in adult and neonatal neurons, we monitored calcium in CA1 hippocampa...

Journal: :Proceedings of the Royal Society of Edinburgh. Section B. Biological Sciences 1994

2011
Bobby L. LaRue Pamela A. Padilla

BACKGROUND Preconditioning environments or therapeutics, to suppress the cellular damage associated with severe oxygen deprivation, is of interest to our understanding of diseases associated with oxygen deprivation. Wildtype C. elegans exposed to anoxia enter into a state of suspended animation in which energy-requiring processes reversibly arrest. C. elegans at all developmental stages survive...

1941

Anoxia is a general term denotingoxygen lack regardlessof how orwhere in the body it is produced. There are fourgeneral types of anoxia: anoxic anoxia (anoxemia) , anemicanoxia, stagnant anoxia and histological anoxia.In normal oxygenation oftissues, oxygen is given up to thetissuesbecause of a difference in oxygen tension in the capil-laries and the tiss...

2017
Li Yan Haixiang Gao Chunzhi Li Xiaowen Han Xiaoyong Qi

We investigated the possible implication of miR-23a in anoxia-induced phenotypic transformation of the pulmonary arterial smooth muscle and studied the mechanism of upregulation of miR-23a expression in anoxia. The collagenase digestion method was used for preparing rat primary pulmonary artery smooth muscle cell (PASMC) culture. SM-MHC, SM-α-actin, calponin-1 and SM22α protein expression level...

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