Evidence map›Paper›PMID 21035480›Full record

ArticleMechanisms of ageing and development

Human blood and marrow side population stem cell and Stro-1 positive bone marrow stromal cell numbers decline with age, with an increase in quality of surviving stem cells: correlation with cytokines.

S K Brusnahan, T R McGuire, J D Jackson, J T Lane, K L Garvin, B J O'Kane, A M Berger, S R Tuljapurkar, M A Kessinger, J G Sharp

Abstract read
In one paragraph

Article in Mechanisms of ageing and development. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed
1.7field-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

32 citing papers in PubMed, 57 citations in OpenAlex.

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  12. The local concentration of CaJournal of orthopaedic surgery and research · 2020
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  20. The Analysis ofStem cells international · 2019
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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

10 authors at 1 institution in 1 country.

S K BrusnahanDepartment of Genetics, Cell Biology & Anatomy, University of Nebraska Medical Center, Omaha, NE 68198-6395, USA.
T R McGuire
J D Jackson
J T Lane
K L Garvin
B J O'Kane
A M Berger
S R Tuljapurkar
M A Kessinger
J G Sharp
University of Nebraska Medical Center · US

Funding

Stem Cell Quality Assays: Correlation with Aging/HealthR01AG024912 · NIA · UNIVERSITY OF NEBRASKA MEDICAL CENTER · PI SHARP, JOHN GRAHAM · 2004 to 2010
$1.5M
NIA NIH HHS AG 024912NIA NIH HHS R01 AG024912
6 · The paper itself

Abstract

Hematological deficiencies increase with aging leading to anemias, reduced hematopoietic stress responses and myelodysplasias. This study tested the hypothesis that side population hematopoietic stem cells (SP-HSC) would decrease with aging, correlating with IGF-1 and IL-6 levels and increases in bone marrow fat. Marrow was obtained from the femoral head and trochanteric region of the femur at surgery for total hip replacement (N=100). Whole trabecular marrow samples were ground in a sterile mortar and pestle and cellularity and fat content determined. Marrow and blood mononuclear cells were stained with Hoechst dye and the SP-HSC profiles acquired. Marrow stromal cells (MSC) were enumerated flow cytometrically employing the Stro-1 antibody, and clonally in the colony forming unit fibroblast (CFU-F) assay. Plasma levels of IGF-1 (ng/ml) and IL-6 (pg/ml) were measured by ELISA. SP-HSC in blood and bone marrow decreased with age but the quality of the surviving stem cells increased. MSC decreased non-significantly. IGF-1 levels (mean=30.7, SEM=2) decreased and IL-6 levels (mean=4.4, SEM=1) increased with age as did marrow fat (mean=1.2mmfat/g, SEM=0.04). There were no significant correlations between cytokine levels or fat and SP-HSC numbers. Stem cells appear to be progressively lost with aging and only the highest quality stem cells survive.

Indexed as

AdultAgedAgingAntigens, SurfaceBlood Cell CountBone MarrowCell CountCell SurvivalCohort StudiesColony-Forming Units AssayCytokinesHematopoietic Stem CellsHumansMiddle AgedSide-Population CellsStromal CellsAntigens, SurfaceCytokinesSTRO-1 antigen, human

Identifiers

PMID21035480
PMCPMC3014682
OpenAlexW2026277165

What OpenQuestion holds

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LicenceTDM
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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.