Abstract:
BACKGROUND:Abnormal erythrocyte Na/Li countertransport is associated with diseases such as essential hypertension and diabetic renal disease. Although it seems unlikely that Na/Li countertransport contributes to any disease process, it may be abnormal because of a change in the cell membrane that is part of the disease process. METHODS:We have shown that Na/Li countertransport kinetics are modified by two types of thiol group. One of these, which we have called 'type 1', is rapidly alkylated by N-ethylmaleimide to give a kinetic pattern similar to that in the above diseases. RESULTS:AtpH 6 and 2 degrees C, both N-ethylmaleimide and iodoacetamide cause the K(m) of Na/Li countertransport to decrease to completion in 300s, with 78% (SEM 6%) of the decrease occurring in 30s. Using these reaction conditions, N-ethylmaleimide reacted with a unique thiol group on a 33-kD protein, blocking its subsequent reaction with biotin maleimide. This 33-kD protein was present in rabbit erythrocytes, which have high levels of Na/Li countertransport, but absent from rat erythrocytes, which have no Na/Li countertransport. Iodoacetyl biotin labelled a 60-kD protein that was specifically blocked by iodoacetamide. CONCLUSION:We suggest that these proteins are members of a cluster of membrane proteins that can modify Na/Li countertransport and may have a functional role in the disease processes.
journal_name
Eur J Clin Investjournal_title
European journal of clinical investigationauthors
Thomas TH,Rutherford PA,Vareesangthip K,Wilkinson R,West ICdoi
10.1046/j.1365-2362.1998.00276.xsubject
Has Abstractpub_date
1998-04-01 00:00:00pages
259-65issue
4eissn
0014-2972issn
1365-2362journal_volume
28pub_type
杂志文章abstract::In systemic lupus erythematosus (SLE) patients, most of the clinical manifestation share a vascular component triggered by endothelial dysfunction. Endothelial cells (ECs) activation occurs both on the arterial and venous side, and the high vascular density of kidneys accounts for the detrimental outcomes of SLE throu...
journal_title:European journal of clinical investigation
pub_type: 杂志文章,评审
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abstract:BACKGROUND:Inflammation is an established contributor in atherosclerosis and several other common diseases including diabetes. Therefore the study was to investigate how inflammatory factors affect lipid metabolism during recovery from hyperinsulinaemia in healthy individuals. MATERIALS AND METHODS:A total of 22 healt...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
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abstract:BACKGROUND:The acute-phase response and anaemia of chronic disease are characterized by hypoferraemia associated with an increased ferritin synthesis, which might be mediated by the activated cytokine cascade. METHODS:We examined the prolonged effects of isolated limb perfusion (ILP) with recombinant human tumour necr...
journal_title:European journal of clinical investigation
pub_type: 临床试验,杂志文章
doi:10.1046/j.1365-2362.1998.00323.x
更新日期:1998-07-01 00:00:00
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journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/j.1365-2362.1995.tb01983.x
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journal_title:European journal of clinical investigation
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journal_title:European journal of clinical investigation
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journal_title:European journal of clinical investigation
pub_type: 临床试验,杂志文章
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更新日期:1985-12-01 00:00:00
abstract:BACKGROUND:Profilin-1 is a ubiquitous, actin-binding protein that plays an important role in the regulation of actin polymerization and cytoskeleton remodelling and contributes to vascular dysfunction. We conducted this study to investigate the association of serum profilin-1 levels with fatal and nonfatal CVE in a coh...
journal_title:European journal of clinical investigation
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journal_title:European journal of clinical investigation
pub_type: 临床试验,杂志文章,随机对照试验
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doi:10.1111/j.1365-2362.1976.tb00544.x
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journal_title:European journal of clinical investigation
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journal_title:European journal of clinical investigation
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journal_title:European journal of clinical investigation
pub_type: 杂志文章,评审
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更新日期:2005-12-01 00:00:00
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journal_title:European journal of clinical investigation
pub_type: 临床试验,杂志文章
doi:10.1111/j.1365-2362.1994.tb02180.x
更新日期:1994-06-01 00:00:00
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journal_title:European journal of clinical investigation
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更新日期:2015-11-01 00:00:00
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journal_title:European journal of clinical investigation
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:1992-10-01 00:00:00
abstract::Deoxyribonucleic acid synthesis requires adequate cellular concentrations of the four deoxyribonucleoside triphosphates. Using a sensitive enzymic assay, we have measured the concentrations (pools) of these compounds in human bone marrow cells and in lymphocytes. The mean concentrations (pmol/10(6) cells) in normal hu...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/j.1365-2362.1975.tb00446.x
更新日期:1975-04-01 00:00:00
abstract:BACKGROUND:Recently, a new mutation of the 5,10-methylenetetrahydrofolate reductase (MTHFR) encoding gene was first described (1793G > A). Only few reports have studied the prevalence of this polymorphism, especially in combination with other MTHFR mutations (677C > T, 1298A > C). METHODS:We cross-sectionally identifi...
journal_title:European journal of clinical investigation
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更新日期:2004-09-01 00:00:00
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journal_title:European journal of clinical investigation
pub_type: 临床试验,杂志文章
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更新日期:2001-04-01 00:00:00
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journal_title:European journal of clinical investigation
pub_type: 杂志文章
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更新日期:1998-10-01 00:00:00
abstract::The change in bone mass during 1 1/2 years was determined in a longitudinal study of sixty adult insulin-treated diabetic out-patients. During the study period the mean bone mass decreased by 1.30 +/- 0.28 (SEM)% (P less than 0.001), to a mean value of 91.0 +/- 1.7% of normal (P less than 0.001). The rate of bone loss...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/j.1365-2362.1981.tb01765.x
更新日期:1981-02-01 00:00:00
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journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/j.1365-2362.1980.tb00040.x
更新日期:1980-08-01 00:00:00
abstract:OBJECTIVE:obesity-related microvascular dysfunction, including alterations in rhythmic changes in vascular diameter, so-called 'vasomotion', may be important in the clustering of obesity with other cardiovascular risk factors. Adipokines have been suggested to play a role in obesity-related vascular dysfunction. Altera...
journal_title:European journal of clinical investigation
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更新日期:2014-07-01 00:00:00