Abstract:
:Both hepatic lipogenesis from glucose and gluconeogenesis from lactate are inhibited by substrates for mixed function oxidation such as aminopyrine. These effects are inducible with phenobarbital pretreatment and absent with a demethylated product of aminopyrine metabolism, aminophenylpyrazolone. The data indicate that an interaction between biosynthesis and drug metabolism occurs in the intact liver cell. In the case of lipogenesis, direct competition for cytosolic NADPH occurs, whereas in the case of gluconeogenesisi, enhanced drug metabolism diverts key intermediates, e.g., malate from glucose synthesis toward NADPH generation. Furthermore, rates of mixed function oxidation were modified following perturbations of intermediary metabolism, e.g., fasting, addition of substrates for glucose synthesis, inhibition of energy metabolism, etc. The data support the hypothesis that in the presence of sufficiently high concentrations of substrate and oxygen, the rate-limiting step for mixed function oxidation in the intact cell is supply of NADPH.
journal_name
Adv Exp Med Bioljournal_title
Advances in experimental medicine and biologyauthors
Thurman RG,Marazzo DPdoi
10.1007/978-1-4615-9026-2_25subject
Has Abstractpub_date
1975-01-01 00:00:00pages
355-67issue
00eissn
0065-2598issn
2214-8019journal_volume
58pub_type
杂志文章,评审abstract::Curcumin was found to be cytotoxic in nature to a wide variety of tumor cell lines of different tissue origin. The action of curcumin is dependent on with the cell type, the concentration of curcumin (IC50: 2-40 microg/mL), and the time of the treatment. The major mechanism by which curcumin induces cytotoxicity is th...
journal_title:Advances in experimental medicine and biology
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doi:10.1007/978-0-387-46401-5_6
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abstract::Progress in studies on the scrapie agent has been hampered by the slow and tedious endpoint titration assays in rodents. A new assay based on incubation period measurements has been developed. The incubation period is defined as the time interval from inoculation to the onset of clinically detectable neurological illn...
journal_title:Advances in experimental medicine and biology
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doi:10.1007/978-1-4757-0495-2_35
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abstract::Stem cells serve as persistent reservoirs for replenishment of rapidly renewing tissues, frequently also ensuring that the correct tissue morphology is maintained. This process is inherently stochastic due to the small number and stochastic division patterns within the stem cell compartments, as well as the essentiall...
journal_title:Advances in experimental medicine and biology
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abstract::Carbon compounds that are needed in small amounts in the diet because they are not made in the body of vertebrates are defined as vitamins. Excluded from this definition are vitamins D, K, and niacin which can be synthesized by the organism or, as in the case of vitamin K, by the host's intestinal bacteria. Lack of su...
journal_title:Advances in experimental medicine and biology
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abstract::Labetalol is a drug used in the treatment of hypertensive disorders of pregnancy (HDP). In a previous study we investigated the influence of the maternal use of labetalol on the cerebral autoregulation (CA) mechanism of neonates. In that study, we found that labetalol induces impaired CA during the first day of life, ...
journal_title:Advances in experimental medicine and biology
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更新日期:2014-01-01 00:00:00
abstract::Transurethral resection (TUR) is the primary mode of therapy for both diagnosis and treatment of bladder cancer. Due to the recurrency of tumoral tissues after TUR further treatment is necessary which is usually in the form of intravesical chemotherapy or immunotherapy. But these therapies have some disadvantages such...
journal_title:Advances in experimental medicine and biology
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doi:
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journal_title:Advances in experimental medicine and biology
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abstract::We present here an experimental approach for exploring a new class of tumor biomarkers that are overexpressed by circulating tumor cells (CTCs) and are likely targetable in immunotherapy against tumor metastasis. Using carbohydrate microarrays, anti-tumor monoclonal antibodies (mAbs) were scanned against a large panel...
journal_title:Advances in experimental medicine and biology
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journal_title:Advances in experimental medicine and biology
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更新日期:2020-01-01 00:00:00
abstract::The tumor microenvironment is composed of cancer cells, noncancer cells (e.g., immune cells, stromal cells, endothelial cells, and adipocytes), and various mediators (e.g., cytokines, chemokines, growth factors, and humoral factors) that work together to support cancer growth, progression, and resistance to therapies....
journal_title:Advances in experimental medicine and biology
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abstract::This study investigated the effects of protein malnutrition and progesterone supplementation on the activities of a spectrum of lysosomal enzymes in tissue fragments of mouse liver and kidney. The working hypothesis was that the known anti-stress action of progesterone could have to do with the inhibition of lysosomes...
journal_title:Advances in experimental medicine and biology
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doi:10.1007/5584_2019_425
更新日期:2019-01-01 00:00:00
abstract::Employees in a seafood factory developed high titers of serum IgE and IgG antibody to antigens from prawn (N. norvegicus) which were aerosolized during processing. Significant serum IgE antibody titers occurred only among those subjects with occupation-related respiratory symptoms, and this serological parameter may b...
journal_title:Advances in experimental medicine and biology
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abstract::To date, there is no definitive treatment for Alzheimer's disease (AD). The realm of stem cells is very promising in regenerative medicine, particularly for neurodegenerative diseases. Various types of stem cells have been used in preclinical/clinical trials for AD aiming the development of an elusive disease modifyin...
journal_title:Advances in experimental medicine and biology
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doi:10.1007/5584_2018_214
更新日期:2018-01-01 00:00:00
abstract::Mitochondria are independent double-membrane organelles responsible for energy production, specifically by completing oxidative phosphorylation. Mitochondria are essential to regulate energy metabolism, signaling pathways, and cell death. Mitochondrial DNA (mtDNA) can be altered by metabolic disorders, oxidative stres...
journal_title:Advances in experimental medicine and biology
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doi:10.1007/978-981-10-6674-0_6
更新日期:2017-01-01 00:00:00
abstract::Fluorodeoxyuridylate (FdUMP) and thymidylate synthase (TS) are one of the better understood systems of drug-target interaction in cancer chemotherapy. Isolation and characterization of TS (initially from Lactobacillus casei and later from a variety of other sources), cloning and sequencing of the gene, determination o...
journal_title:Advances in experimental medicine and biology
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doi:10.1007/978-1-4684-5607-3_1
更新日期:1988-01-01 00:00:00
abstract::Our data indicate that the proinflammatory cytokine, IL-1alpha inhibits GR translocation and hormone-induced GR-mediated gene transcription, and, in conjunction with previous in vivo and in vitro studies, can be interpreted to suggest that cytokines have the capacity to contribute to glucocorticoid resistance and thus...
journal_title:Advances in experimental medicine and biology
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journal_title:Advances in experimental medicine and biology
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abstract::It is clear that the combination of 31P NMR studies of muscle and of other organs with biochemical and physiological measurements is an extremely powerful method for studying cellular energetics. We have presented examples of our on-going experiments. Well defined and stable in vitro preparations of mammalian fast-twi...
journal_title:Advances in experimental medicine and biology
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更新日期:1983-01-01 00:00:00
abstract::We have shown that T cells vigorously cycling in response to growth lymphokines are driven into apoptosis by potent TCR restimulation. This process, termed propriocidal regulation, appears to be a normal feedback inhibitory mechanism to prevent excessive T cell proliferation and lymphokine production. Exposure of T ce...
journal_title:Advances in experimental medicine and biology
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更新日期:1995-01-01 00:00:00
abstract::Chemometrics has been a fundamental discipline for the development of metabolomics, while symbiotically growing with it. From design of experiments, through data processing, to data analysis, chemometrics tools are used to design, process, visualize, explore and analyse metabolomics data.In this chapter, the most comm...
journal_title:Advances in experimental medicine and biology
pub_type: 杂志文章
doi:10.1007/978-3-319-47656-8_7
更新日期:2017-01-01 00:00:00
abstract::Asthma is a heterogeneous inflammatory disease. Most patients respond to current standard of care, i.e., bronchodilators, inhaled glucocorticosteroids and other anti-inflammatory drugs, but in some adequate asthma control cannot be achieved with standard treatments. These difficult-to-treat patients would be the targe...
journal_title:Advances in experimental medicine and biology
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abstract::Some species avoid low-frequency masking by shifting their calls to higher frequencies. We addressed the hypothesis that Pagophilus groenlandicus (harp seals) will make more high-frequency underwater calls to avoid low-frequency conspecific masking as calling rates increase. The spectral shapes at high and low calling...
journal_title:Advances in experimental medicine and biology
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abstract::Oxytocin is a nonapeptide hormone that participates in the regulation of parturition and lactation. It has also been implicated in various behaviors, such as mating and maternal, and memory. To investigate whether or not oxytocin (OT) is essential for any of these functions, we eliminated, by homologous recombination,...
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abstract::Embryonic stem (ES) cells undergo self-renewal and are pluripotent, i.e., they can give rise to all the types of specialised cells in the body. Scientific knowledge on ES cells is increasing rapidly, leading to opportunities for establishment of ES cell-based in vitro tests for drug discovery, preclinical safety pharm...
journal_title:Advances in experimental medicine and biology
pub_type: 杂志文章,评审
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更新日期:2012-01-01 00:00:00
abstract::Vitiligo is a disorder of the melanocytes that results in a dynamic spectrum of skin depigmentation. Its etiology is complex and multifactorial, with data supporting several different hypotheses. Given its prominent phenotype, vitiligo has a significant negative impact on quality of life. Coupled with the chronic and ...
journal_title:Advances in experimental medicine and biology
pub_type: 杂志文章,评审
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更新日期:2017-01-01 00:00:00
abstract::By use of an optical system, with which the beam of the first-order diffraction line of He-Ne laser light from a single frog skeletal muscle fiber was split by the wedge-shaped mirror to be focused on two photodiodes ( Haugen & Sten - Knudsen , 1976), small changes in sarcomere length (less than 1 A) could be recorded...
journal_title:Advances in experimental medicine and biology
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更新日期:1984-01-01 00:00:00
abstract::Our understanding of breast cancer and its therapeutic approach has improved greatly due to the advancement of molecular biology in recent years. Clinically, breast cancers are characterized into three basic types based on their immunohistochemical properties. They are triple-negative breast cancer, estrogen receptor ...
journal_title:Advances in experimental medicine and biology
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更新日期:2017-01-01 00:00:00