Evidence map›Paper›PMID 8149407›Full record

ArticleCell calcium1994

Fluorescence lifetime imaging of intracellular calcium in COS cells using Quin-2.

J R Lakowicz, H Szmacinski, K Nowaczyk, W J Lederer, M S Kirby, M L Johnson

Open access · greenAbstract read
In one paragraph

Article in Cell calcium, 1994. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed
10.0field-weighted citation impact, top 2% 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

35 citing papers in PubMed, 107 citations in OpenAlex.

  1. Article
  2. Development of Time-Resolved Luminescence Measurement Instruments for Biosensing and Bioimaging - An Overview.Measurement : journal of the International Measurement Confederation · 2025
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  16. Fluorescence lifetime-resolved pH imaging of living cells.Cytometry. Part A : the journal of the International Society for Analytical Cytology · 2003
    Article
  17. Texture analysis of fluorescence lifetime images of AT- and GC-rich regions in nuclei.The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society · 2001
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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

6 authors at 2 institutions in 1 country.

J R LakowiczDepartment of Biological Chemistry, University of Maryland School of Medicine, Baltimore.
H Szmacinski
K Nowaczyk
W J Lederer
M S Kirby
M L Johnson
University of Maryland, Baltimore · USUniversity of Virginia · US

Funding

WHO'S WHO IN FLUORESCENCEP41RR008119 · NCRR · UNIVERSITY OF MARYLAND BALTIMORE · PI BASKAKOV, ILIA V · 1993 to 2006
$7.4M
ARGON LASER FOR TIME-AND FREQUENCY-DOMAIN FLUORESCENCES10RR007510 · NCRR · UNIVERSITY OF MARYLAND BALTIMORE · PI LAKOWICZ, JOSEPH R. · 1991 to 1991
–
NCRR NIH HHS P41 RR008119NCRR NIH HHS RR-07510NCRR NIH HHS RR-08119
6 · The paper itself

Abstract

We describe the first fluorescence lifetime images of cells. To demonstrate this new capability we measured intracellular images of Ca2+ in COS cells based on the Ca(2+)-dependent fluorescence lifetime of Quin-2. Apparent fluorescence lifetimes were measured by the phase-modulation method using a gain-modulated image intensifier and a slow-scan CCD camera. We describe methods to correct the images for photobleaching during acquisition of the data, and to correct for the position-dependent response of the image intensifier. The phase angle Quin-2 images were found to yield lower than expected Ca2+ concentrations, which appears to be the result of the formation of fluorescent photoproducts by Quin-2. Fluorescence lifetime imaging (FLIM) does not require wavelength-radiometric probes and appears to provide new opportunities for chemical imaging of cells.

Indexed as

AnimalsCalciumCell LineChlorocebus aethiopsKidneyMicroscopy, FluorescenceCalcium

Identifiers

PMID8149407
PMCPMC6906927
OpenAlexW1993682762

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.