Evidence map›Paper›PMID 3676436›Full record

ArticleBiophysical journal1987

Magnetic particle motions within living cells. Measurement of cytoplasmic viscosity and motile activity.

P A Valberg, H A Feldman

Open access · bronzeAbstract read
In one paragraph

Article in Biophysical journal, 1987. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 46 papers.

0numbers the graph read from it
0cells of the map it votes in
46citing papers in PubMed
4.4field-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

46 citing papers in PubMed, 183 citations in OpenAlex.

  1. Article
  2. Diffusion and Viscosity in Mixed Protein Solutions.The journal of physical chemistry. B · 2024
    Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Life (Basel, Switzerland) · 2021
    Review
  9. Nonlinear Elastic and Inelastic Properties of Cells.Journal of biomechanical engineering · 2020
    Review
  10. Article
  11. Emergent spatiotemporal dynamics of the actomyosin network in the presence of chemical gradients.Integrative biology : quantitative biosciences from nano to macro · 2019
    Article
  12. Article
  13. Article
  14. Article
  15. Article
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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

2 authors at 1 institution in 1 country.

P A ValbergDepartment of Environmental Science and Physiology, Harvard School of Public Health, Boston, Massachusetts 02115.
H A Feldman
Harvard University · US

Funding

Translational Research Support CoreP30ES000002 · NIEHS · HARVARD UNIVERSITY (SCH OF PUBLIC HLTH) · PI SUSAN A KORRICK · 1985 to 2026
$44.6M
MAGNETIC FIELD EFFECTS ON MACROPHAGESR01CA040696 · NCI · HARVARD UNIVERSITY (MEDICAL SCHOOL) · PI BRAIN, JOSEPH D · 1986 to 1991
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MAGNETIC PARTICLES TO ASSESS MACROPHAGE BEHAVIORR01HL031029 · NHLBI · HARVARD UNIVERSITY (MEDICAL SCHOOL) · PI BRAIN, JOSEPH D · 1985 to 1985
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USE OF MAGNETIC PARTICLES TO ASSESS MACROPHAGE BEHAVIORR37HL031029 · NHLBI · HARVARD UNIVERSITY (MEDICAL SCHOOL) · PI BRAIN, JOSEPH D · 1986 to 1995
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NCI NIH HHS CA-40696NHLBI NIH HHS HL-31029NIEHS NIH HHS ES-00002
6 · The paper itself

Abstract

Submicrometer magnetic particles, ingested by cells and monitored via the magnetic fields they generate, provide an alternative to optical microscopy for probing movement and viscosity of living cytoplasm, and can be used for cells both in vitro and in vivo. We present methods for preparing lung macrophages tagged with magnetic particles for magnetometric study. Interpretation of the data involves fitting experimental remanent-field decay curves to nonlinear mechanistic models of intracellular particle motion. The model parameters are sensitive to mobility and apparent cytoplasmic viscosity experienced by particle-containing organelles. We present results of parameter estimation for intracellular particle behavior both within control cells and after (a) variable magnetization duration, (b) incubation with cytochalasin D, and (c) particle twisting by external fields. Magnetometric analysis showed cytoplasmic elasticity, dose-dependent motion inhibition by cytochalasin D, and a shear-thinning apparent viscosity.

Indexed as

MagneticsAnimalsCricetinaeCytoplasmFerric CompoundsMacrophagesMathematicsMicroscopy, ElectronModels, BiologicalViscosityFerric Compoundsferric oxide

Identifiers

PMID3676436
PMCPMC1330045
OpenAlexW2089121353

What OpenQuestion holds

Textmetadata
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.