Evidence map›Paper›PMID 27039311›Full record

ArticleJournal of pharmacokinetics and pharmacodynamics2016

Models for the red blood cell lifespan.

Rajiv P Shrestha, Joseph Horowitz, Christopher V Hollot, Michael J Germain, John A Widness, Donald M Mock, Peter Veng-Pedersen, Yossi Chait

Open access · greenAbstract read
In one paragraph

Article in Journal of pharmacokinetics and pharmacodynamics, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
1.6field-weighted citation impact, top 17% 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

23 citing papers in PubMed, 43 citations in OpenAlex.

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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 2 countries.

Rajiv P ShresthaOctet Research Inc., 101 Arch St. Suite 1950, Boston, MA, 02110, USA. rajiv@octetresearch.com.ORCID 0000-0002-6045-1482
Joseph HorowitzDepartment of Mathematics & Statistics, University of Massachusetts, Amherst, MA, 01003, USA.
Christopher V HollotDepartment of Electrical & Computer Engineering, University of Massachusetts, Amherst, MA, 01003, USA.
Michael J GermainRenal and Transplant Associates of New England, Division of Nephrology, Baystate Medical Center, Tufts University School of Medicine, Boston, MA, USA.
John A WidnessDepartment of Pediatrics, College of Medicine, The University of Iowa, Iowa City, IA, 52242, USA.
Donald M MockDepartment of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA.
Peter Veng-PedersenDivision of Pharmaceutics, College of Pharmacy, The University of Iowa, Iowa City, IA, 52242, USA.
Yossi ChaitDepartment of Mechanical & Industrial Engineering, University of Massachusetts, Amherst, MA, 01003, USA.
University of Massachusetts Amherst · USUniversity of Iowa · USComet (Switzerland) · CHTufts University · USUniversity of Arkansas for Medical Sciences · US

Funding

THE RoLE OF NEONATAL ANEMIA IN LEARNING AND MEMORYP01HL046925 · NHLBI · UNIVERSITY OF IOWA · PI NOPOULOS, PEGGY C · 1992 to 2022
$34.3M
UNIVERSITY OF IOWA CTSA FOR PEDIATRIC RESEARCHUL1RR024979 · NCRR · UNIVERSITY OF IOWA · PI ROSENTHAL, GARY E · 2007 to 2011
$31.8M
Arkansas Center for Clinical and Translational ResearchUL1TR000039 · NCATS · UNIV OF ARKANSAS FOR MED SCIS · PI BECK, CORNELIA MARIE, JAMES, LAURA P · 2012 to 2014
$10.0M
The Engineering of Individualized Anemia Management ProtocolsK25DK096006 · NIDDK · UNIVERSITY OF MASSACHUSETTS AMHERST · PI CHAIT, YOSSI · 2013 to 2016
$670k
Flow Cytometry Cell SorterS10RR027219 · NCRR · UNIVERSITY OF IOWA · PI BALLAS, ZUHAIR K. · 2009 to 2009
$500k
NCATS NIH HHS UL1 TR000039NCRR NIH HHS S10 RR027219NCRR NIH HHS UL1 RR024979NHLBI NIH HHS P01 HL046925NIDDK NIH HHS K25 DK096006
6 · The paper itself

Abstract

The lifespan of red blood cells (RBCs) plays an important role in the study and interpretation of various clinical conditions. Yet, confusion about the meanings of fundamental terms related to cell survival and their quantification still exists in the literature. To address these issues, we started from a compartmental model of RBC populations based on an arbitrary full lifespan distribution, carefully defined the residual lifespan, current age, and excess lifespan of the RBC population, and then derived the distributions of these parameters. For a set of residual survival data from biotin-labeled RBCs, we fit models based on Weibull, gamma, and lognormal distributions, using nonlinear mixed effects modeling and parametric bootstrapping. From the estimated Weibull, gamma, and lognormal parameters we computed the respective population mean full lifespans (95 % confidence interval): 115.60 (109.17-121.66), 116.71 (110.81-122.51), and 116.79 (111.23-122.75) days together with the standard deviations of the full lifespans: 24.77 (20.82-28.81), 24.30 (20.53-28.33), and 24.19 (20.43-27.73). We then estimated the 95th percentiles of the lifespan distributions (a surrogate for the maximum lifespan): 153.95 (150.02-158.36), 159.51 (155.09-164.00), and 160.40 (156.00-165.58) days, the mean current ages (or the mean residual lifespans): 60.45 (58.18-62.85), 60.82 (58.77-63.33), and 57.26 (54.33-60.61) days, and the residual half-lives: 57.97 (54.96-60.90), 58.36 (55.45-61.26), and 58.40 (55.62-61.37) days, for the Weibull, gamma, and lognormal models respectively. Corresponding estimates were obtained for the individual subjects. The three models provide equally excellent goodness-of-fit, reliable estimation, and physiologically plausible values of the directly interpretable RBC survival parameters.

Indexed as

Models, BiologicalCell SurvivalCellular SenescenceComputational BiologyData Interpretation, StatisticalErythrocytesHumansDirect and indirect RBC survival modelsMathematical modelRBC lifespanSurvival functions

Identifiers

PMID27039311
PMCPMC4887310
OpenAlexW2313772754

What OpenQuestion holds

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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.