Evidence map›Paper›PMID 28533508›Full record

ArticleScientific reports2017

Kinetic interpretation of log-logistic dose-time response curves.

Walter W Focke, Isbe van der Westhuizen, Ndeke Musee, Mattheüs Theodor Loots

Abstract read
In one paragraph

Article in Scientific reports, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
–field-weighted citation impact
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

8 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Real-timeBiomedical optics express · 2023
    Article
  5. Article
  6. Extrapolating from acute to chronic toxicity in vitro.Toxicology in vitro : an international journal published in association with BIBRA · 2021
    Article
  7. Membrane fusion and drug delivery with carbon nanotube porins.Proceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  8. Article
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

4 authors.

Walter W FockeInstitute of Applied Materials, Department of Chemical Engineering, University of Pretoria, Pretoria, South Africa. Walter.Focke@up.ac.za.ORCID 0000-0002-8512-8948
Isbe van der WesthuizenInstitute of Applied Materials, Department of Chemical Engineering, University of Pretoria, Pretoria, South Africa.
Ndeke MuseeInstitute of Applied Materials, Department of Chemical Engineering, University of Pretoria, Pretoria, South Africa.
Mattheüs Theodor LootsDepartment of Statistics, University of Pretoria, Pretoria, South Africa.ORCID 0000-0001-7722-3913

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

A Hill-type time-response curve was derived using a single-step chemical kinetics approximation. The rate expression for the transformation is a differential equation that provides an interpolation formula between the logistic growth curve and second order kinetics. The solution is equivalent to the log-logistic cumulative distribution function with the time constant expressed in terms of a kinetic rate constant. This expression was extended to a full dose-time-response equation by postulating a concentration dependence for the rate constant. This was achieved by invoking a modified form of Haber's law that connects an observed toxic effect with the concentration of the active agent and the elapsed exposure time. Analysis showed that the concept of Concentration Addition corresponds to a special case where the rate constant for the overall transformation rate is proportional to the sum of the rate constants that apply when the agents act individually. Biodiesel "survival" curves were measured and used to test the applicability of the empirical model to describe the effects of inhibitor dosage and binary inhibitor mixtures. Positive results suggest that the proposed dose-response relationship for the toxicity of agents to organisms can be extended to inanimate systems especially in cases where accurate mechanistic models are lacking.

Identifiers

PMID28533508
PMCPMC5440384

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.