Abstract：
:Cultured human fibroblasts accumulated methotrexate polyglutamates to levels far in excess of the dihydrofolate reductase binding capacity. After four days in methotrexate-free medium the intracellular drug level dropped by 70% but nearly 80% of the remaining methotrexate was in the form of polyglutamates. Reduced folates prevented the accumulation of polyglutamates and the effects of methotrexate on deoxyuridine incorporation into DNA and cell growth if present along with methotrexate from the beginning of the incubation. However, the reduced folates were less effective if added to cells after a long exposure to methotrexate alone. Thymidine, glycine, and adenosine (GAT) prevent methotrexate toxicity only if maintained in the incubation medium. However, preincubation with methotrexate and GAT permits continued synthesis and accumulation of polyglutamates so that when the GAT and methotrexate were removed, toxicity from the retained methotrexate polyglutamates could be expressed. (2,4-diamino-5-(3'4'-dichlorophenyl)-6 methyl pyrimidine (DDMP), an antifol that does not form polyglutamate derivatives, inhibited deoxyuridine incorporation into DNA as long as the DDMP remained in the culture medium. Compared to what was seen with longer exposures to methotrexate, removal of DDMP resulted in a greater reversal of the inhibition of deoxyuridine incorporation.
journal_name
Adv Exp Med Bioljournal_title
Advances in experimental medicine and biologyauthors
Rosenblatt DS,Whitehead VMdoi
10.1007/978-1-4757-5241-0_21subject
Has Abstractpub_date
1983-01-01 00:00:00pages
275-85eissn
0065-2598issn
2214-8019journal_volume
163pub_type
杂志文章abstract：:We review Clan CA Family C1 peptidases of kinetoplastid parasites (Trypanosoma and Leishmania) with respect to biochemical and genetic diversity, genomic organization and stage-specificity and control of expression. We discuss their contributions to parasite metabolism, virulence and pathogenesis and modulation of the...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4419-8414-2_6
更新日期：2011-01-01 00:00:00
abstract：:The intramural blood vessels and fluid-filled interstitial space form a hydraulic continuum enmeshed by myocardial muscle layers and collagen matrix. Coronary circulation was found to be strongly influenced by passive and active properties of the muscle surrounding the coronary microvasculature. Selective remodeling o...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-2946-0_11
更新日期：1993-01-01 00:00:00
abstract：:Surfactants are chemically synthesized surface-active compounds widely used for large number of applications in various industries. During last few years there is increase demand of biological surface-active compounds or biosurfactants which are produced by large number of microorganisms as they exert biodegradability...
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doi：10.1007/978-1-4419-5979-9_11
更新日期：2010-01-01 00:00:00
abstract：:There has been a deluge of biological sequence data in the public domain, which makes sequence comparison one of the most fundamental computational problems in bioinformatics. The biologists routinely use pairwise alignment programs to identify similar, or more specifically, related sequences (having common ancestor)....
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abstract：:We review results about the structure of administration of chemotherapeutic anti-cancer treatment that we have obtained from an analysis of minimally parameterized mathematical models using methods of optimal control. This is a branch of continuous-time optimization that studies the minimization of a performance crite...
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doi：10.1007/978-3-319-42023-3_11
更新日期：2016-01-01 00:00:00
abstract：:This chapter will describe infectious complications of atopic dermatitis, including bacterial, viral, and fungal infections and the evolving understanding of the relationship between atopic dermatitis and infectious disease. The underlying immunological dysregulation and poor skin barrier function associated with atop...
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journal_title：Advances in experimental medicine and biology
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更新日期：2013-01-01 00:00:00
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journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4899-1828-4_36
更新日期：1997-01-01 00:00:00
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journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4757-0734-2_6
更新日期：1979-01-01 00:00:00
abstract：:The autoimmune retinopathies (AIRs) are a group of inflammatory-mediated retinopathies that present with unexplained visual loss (both central and peripheral), visual field defects, usually a ring scotoma, photoreceptor dysfunction as evident on electroretinography (ERG), and circulating autoantibodies against retinal...
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更新日期：2018-01-01 00:00:00
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journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-94-007-2869-1_5
更新日期：2012-01-01 00:00:00
abstract：:Tumor-associated neutrophils (TANs) play a major role during cancer development and progression in the tumor microenvironment. Neutrophil elastase (NE) is a serine protease normally expressed in neutrophil primary granules. Formation of neutrophil extracellular traps (NETs), a mechanism used by neutrophils, has been t...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-030-44518-8_2
更新日期：2020-01-01 00:00:00
abstract：:The success rate from investigational new drug filing to drug approval has remained low for decades despite major scientific and technological advances, and a steady increase of funding and investment. The failure to demonstrate drug efficacy has been the major reason that drug development does not progress beyond pha...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-030-28471-8_7
更新日期：2019-01-01 00:00:00
abstract：:A rapid, non-invasive urine test for early stage alcohol-induced liver disease (ALD) would permit risk stratification and treatment of high-risk individuals before ALD leads to irreversible liver damage and death. Urinary metabolomic studies were carried out to identify ALD-associated metabolic biomarkers using Ppara-...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-09614-8_13
更新日期：2015-01-01 00:00:00
abstract：:The full length spike (S) gene of porcine respiratory coronavirus (PRCV) was inserted into the genome of human adenovirus type 5 downstream of the early transcription region 3 promoter. The recombinant virus replicated in cultures of the swine testicle ST cell line and directed the synthesis of S antigen to an amount ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-1899-0_42
更新日期：1995-01-01 00:00:00
abstract：:Cytogenetic discoveries of balanced translocations in soft tissue tumors have opened the way to molecular genetic definition of these translocations as gene fusions from the late 1980s. Many sarcomas are known to have such fusions, and the demonstration of the fusion transcripts in tumor tissue is of great value in sp...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4020-5133-3_10
更新日期：2006-01-01 00:00:00
abstract：:This review of the effects of hemidecortication in humans has been limited to studies of cognitive outcome published during the last 20 years. More directly than in the case of split-brain patients, the patients reviewed here attest to the remarkable ability of a single hemisphere, whether left or right, to support at...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4615-3420-4_8
更新日期：1992-01-01 00:00:00
abstract：:Lowered concentration of Ca2+ ions, resulting from illumination of the photoreceptor cell, is the signal for resynthesis of cGMP by retina-specific guanylyl cyclase (retGC). This Ca2+-dependent activation of retGC is mediated by Ca2+-binding proteins named GCAPs (guanylyl cyclase-activating proteins) and contributes t...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4615-0121-3_19
更新日期：2002-01-01 00:00:00
abstract：:Neuronal ceroid lipofuscinosis (NCL) is the most common group of neurogenetic storage diseases typically beginning in childhood. The juvenile form (JNCL), also known as Batten disease, is the most common form. Vision-related problems are often an early sign, appearing prior to motor and mental deficits. We have previo...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-75402-4_50
更新日期：2018-01-01 00:00:00
abstract：:Review of the literature of the past 40 years on tyrosine and its toxicity shows that no direct link between this aromatic amino acid and carcinogenesis has been well established. Ten years ago, studies of tyrosine toxicity in mice suggested the formation of an epoxide adduction product presumably derived from tyrosin...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4613-1835-4_17
更新日期：1986-01-01 00:00:00
abstract：:RHO (Rod opsin) encodes a G-protein coupled receptor that is expressed exclusively by rod photoreceptors of the retina and forms the essential photopigment, rhodopsin, when coupled with 11-cis-retinal. Many rod opsin disease -mutations cause rod opsin protein misfolding and trigger endoplasmic reticulum (ER) stress, l...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-17121-0_25
更新日期：2016-01-01 00:00:00
abstract：:The prognosis of patients with pulmonary arterial hypertension (PAH) is poor. Available therapies (Ca(++)-channel blockers, epoprostenol, bosentan) have limited efficacy or are expensive and associated with significant complications. PAH is characterized by vasoconstriction, thrombosis in-situ and vascular remodeling....
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4419-8997-0_21
更新日期：2003-01-01 00:00:00
abstract：:Hypertrophic cardiomyopathy (HCM) is perhaps the most common cause of inherited sudden death in otherwise healthy young individuals. There are presently seven known genes in which mutations have been shown to cause the disease. The first identified disease gene was beta myosin heavy chain (BMHC). Our laboratory has id...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-6039-1_13
更新日期：1998-01-01 00:00:00
abstract：:Retinoblastoma (Rb) is a malignant tumor that originates from developing retina. Diagnosis based on clinical signs and symptoms and is usually made in children under the age of five years. Mutations in both alleles of the RB1 gene are a prerequisite for this tumor to develop. In most patients with sporadic unilateral ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4419-6448-9_21
更新日期：2010-01-01 00:00:00
abstract：:We start by describing the functions of the uterus, its structure, both gross and fine, innervation and blood supply. It is interesting to note the diversity of the female's reproductive tract between species and to remember it when working with different animal models. Myocytes are the overwhelming cell type of the u...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-13-5895-1_10
更新日期：2019-01-01 00:00:00
abstract：:Vitamin D levels and metabolism may play a role in the pathogenesis and treatment of atherosclerosis and subsequent cardiovascular health. Herein, we discuss both normal and disordered vitamin D metabolism as it pertains to atherosclerosis, and we review major clinical trials regarding vitamin D levels and effects of ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-319-56017-5_15
更新日期：2017-01-01 00:00:00
abstract：:Sarcoidosis is a systemic granulomatous disease with unknown etiology. Lungs and lymph nodes are commonly affected. Also, cases of pulmonary hypertension (PH) and pulmonary arterial hypertension (PAH) are described. However, the exact prevalence of PAH in patients with sarcoidosis is unclear. A 111 patients with prove...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-94-007-4546-9_38
更新日期：2013-01-01 00:00:00
abstract：:ATP binding cassette (ABC)-containing drug efflux transporters play important roles in regulating intracellular drug concentrations that determine cell sensitivity to chemotherapeutic agents. Of particular relevance to cancer chemotherapy are the transporters P-glycoprotein (Pgp) encoded by multidrug resistance 1 gene...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-0-387-74039-3_2
更新日期：2007-01-01 00:00:00
abstract：:The study of patients with movement disorders provides insight into both the functional organization and the neural substrates of the perceptual-motor system. By and large, we feel this source of information has been underutilized within the basic science of motor control. To begin to address this shortcoming, this ch...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-0-387-77064-2_19
更新日期：2009-01-01 00:00:00
abstract：:Non-coding RNAs mediated core elements of pathways contributes to the disorder of biological function in diseases. Identification of non-coding RNAs mediated subpathways not only can help for deciphering the pathogenic mechanism of complex diseases, but also can gain insight into the functional roles of non-coding RNA...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-13-0719-5_9
更新日期：2018-01-01 00:00:00
