Evidence map›Paper›PMID 30298363›Full record

SynthesisEuropean journal of clinical pharmacology2019

The intact nephron hypothesis as a model for renal drug handling.

Sudeep Pradhan, Stephen B Duffull, Robert J Walker, Daniel F B Wright

Abstract readSystematic Review
PubMed Publisher
In one paragraph

Synthesis in European journal of clinical pharmacology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing 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

9 citing papers in PubMed.

  1. Article
  2. Article
  3. Medication Management in the Critically Ill Patient with Acute Kidney Injury.Clinical journal of the American Society of Nephrology : CJASN · 2023
    Review
  4. Article
  5. Article
  6. Article
  7. Drug-Dosing Adjustment in Dogs and Cats with Chronic Kidney Disease.Animals : an open access journal from MDPI · 2022
    Review
  8. Article
  9. Ampicillin pharmacokinetics in azotemic and healthy dogs.Journal of veterinary internal medicine · 2021
    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.

Sudeep PradhanSchool of Pharmacy, University of Otago, PO Box 56, Dunedin, 9054, New Zealand.
Stephen B DuffullSchool of Pharmacy, University of Otago, PO Box 56, Dunedin, 9054, New Zealand.
Robert J WalkerDepartment of Medicine, University of Otago, Dunedin, New Zealand.
Daniel F B WrightSchool of Pharmacy, University of Otago, PO Box 56, Dunedin, 9054, New Zealand. dan.wright@otago.ac.nz.ORCID http://orcid.org/0000-0001-9313-9252

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe intact nephron hypothesis (INH) states that impaired renal function results from a reduction in the number of complete (intact) nephrons. Under this model, renal drug clearance is assumed to be a linear function of glomerular filtration while tubular handling is ignored. The aims of this study were to systematically review published studies designed to test the INH and to assess the strength of the study designs used.

methodsA systematic literature search was conducted in MEDLINE, EMBASE and Google Scholar. Studies specifically designed to understand the relationship between glomerular and tubular function across different levels of renal function were included. Studies that found a linear relationship between GFR and tubular clearance were deemed to support the INH while studies that found a non-linear relationship did not support the INH. Study design was accessed using a bespoke strength of evidence score.

resultsThirty studies met the criteria for inclusion. Of these, 24 did not support the INH. Studies that did not support the INH used methods for measuring tubular clearance that were more robust and included subjects with a wider range of GFR values than studies that supported the INH. DISCUSSION: Our results suggest that the INH may not be a suitable general model for renal drug handling, particularly for drugs that are eliminated by tubular mechanisms. Further studies to assess the clinical importance of a non-linear relationship between drug clearance and GFR are warranted.

Indexed as

AnimalsBiological TransportGlomerular Filtration RateHumansKidney DiseasesKidney Function TestsMetabolic Clearance RateNephronsPharmaceutical PreparationsPharmaceutical PreparationsIntact nephron hypothesisRenal dose adjustmentRenal drug handlingSystematic review

Identifiers

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.