Evidence map›Paper›PMID 18591386›Full record

ArticleDiabetes2008

Evidence for interindividual heterogeneity in the glucose gradient across the human red blood cell membrane and its relationship to hemoglobin glycation.

Paramjit K Khera, Clinton H Joiner, Anthony Carruthers, Christopher J Lindsell, Eric P Smith, Robert S Franco, Yancey R Holmes, Robert M Cohen

Open access · hybridAbstract read
In one paragraph

Article in Diabetes, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 74 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
74citing papers in PubMed, 1 pooled it
4.2field-weighted citation impact, top 5% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

74 citing papers in PubMed, 1 synthesis or guideline pooled it, 137 citations in OpenAlex.

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14 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 5 institutions in 1 country.

Paramjit K KheraDivision of Endocrinology, Diabetes, and Metabolism, Department of Medicine, University of Cincinnati Medical Center, Cincinnati, Ohio, USA.
Clinton H Joiner
Anthony Carruthers
Christopher J Lindsell
Eric P Smith
Robert S Franco
Yancey R Holmes
Robert M Cohen
University of Cincinnati Medical Center · USUniversity of Cincinnati · USCincinnati Children's Hospital Medical Center · USUniversity of Massachusetts Chan Medical School · USVeterans Health Administration · US

Funding

VITAMIN K DEFICIENCY IN CHOLESTATIC LIVER DISEASEM01RR008084 · NCRR · CINCINNATI CHILDRENS HOSP MED CTR · PI HEUBI, JAMES E. · 1994 to 2009
$20.6M
METABOLIC CONTROL OF SUGAR TRANSPORTR01DK036081 · NIDDK · UNIV OF MASSACHUSETTS MED SCH WORCESTER · PI CARRUTHERS, ANTHONY · 1986 to 2012
$3.4M
The Glycosylation Gap and Diabetic ComplicationsR01DK063088 · NIDDK · UNIVERSITY OF CINCINNATI · PI COHEN, ROBERT MAYNARD · 2002 to 2005
$1.5M
NCRR NIH HHS M01 RR008084NCRR NIH HHS RR-08084NIDDK NIH HHS R01 DK036081NIDDK NIH HHS R01 DK063088NIDDK NIH HHS R01 DK-63088
6 · The paper itself

Abstract

objectiveTo determine whether interindividual heterogeneity in the erythrocyte (red blood cell [RBC]) transmembrane glucose gradient might explain discordances between A1C and glycemic control based on measured fructosamine. RESEARCH DESIGN AND

methodsWe modeled the relationship between plasma glucose and RBC glucose as the concentration distribution (C(i)-to-C(o) ratio) of a nonmetabolizable glucose analog (14)C-3-O-methyl glucose ((14)C-3OMG) inside (C(i)) and outside (C(o)) RBCs in vitro. We examined the relationship between that distribution and the degree of glycation of hemoglobin in comparison with glycation of serum proteins (fructosamine), the glycation gap. A1C, fructosamine, and in vitro determination of the (14)C-3OMG distribution in glucose-depleted RBCs were measured in 26 fasted subjects.

resultsThe C(i)-to-C(o) ratio 0.89 +/- 0.07 for 3-O-methyl-d-glucopyranose (3OMG) ranged widely (0.72-1.04, n = 26). In contrast, urea C(i)-to-C(o) (1.015 +/- 0.022 [range 0.98-1.07], P < 0.0001) did not. Concerning mechanism, in a representative subset of subjects, the C(i)-to-C(o) ratio was retained in RBC ghosts, was not dependent on ATP or external cations, and was reestablished after reversal of the glucose gradient. The 3OMG C(i)-to-C(o) ratio was not correlated with serum fructosamine, suggesting that it was independent of mean plasma glucose. However, C(i)-to-C(o) did correlate with A1C (R(2) = 0.19) and with the glycation gap (R(2) = 0.20), consistent with a model in which differences in internal glucose concentration at a given mean plasma glucose contribute to differences in A1C for given level of glycemic control.

conclusionsThe data demonstrate interindividual heterogeneity in glucose gradients across RBC membranes that may affect hemoglobin glycation and have implications for diabetes complications risk and risk assessment.

Indexed as

AdultCarbon RadioisotopesDiabetes MellitusErythrocyte MembraneErythrocytesFemaleFructosamineGlucoseGlycated HemoglobinGlycosylationGuanosineHomeostasisHumansMaleMiddle AgedModels, Biological3'-O-methylguanosineCarbon RadioisotopesFructosamineGlucoseGlycated HemoglobinGuanosineUreaWater

Identifiers

PMID18591386
PMCPMC2518496
OpenAlexW2106243784

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.