Evidence map›Paper›PMID 16951999›Full record

ArticlePharmaceutical research2006

The absorption of darbepoetin alfa occurs predominantly via the lymphatics following subcutaneous administration to sheep.

Danielle N McLennan, Christopher J H Porter, Glenn A Edwards, Anne C Heatherington, Steven W Martin, Susan A Charman

Abstract read
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Article in Pharmaceutical research, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
0.2field-weighted citation impact, top 44% 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

15 citing papers in PubMed, 38 citations in OpenAlex.

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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 3 institutions in 2 countries.

Danielle N McLennanCentre for Drug Candidate Optimisation, Victorian College of Pharmacy, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia.
Christopher J H Porter
Glenn A Edwards
Anne C Heatherington
Steven W Martin
Susan A Charman
Monash University · AUAmgen (United States) · USUniversity of Melbourne · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo determine the contribution of the lymphatics to the systemic availability of darbepoetin alfa (DA) using an established sheep model. MATERIALS AND

methodsDA was administered either by intravenous (IV) injection (0.2, 0.5 or 2 microg/kg) or by subcutaneous (SC) administration (2 microg/kg) into the interdigital space of the hind leg. A SC control group was used to determine the absolute bioavailability (F (sys)). Cannulation of the peripheral lymphatics in a parallel SC group allowed the continuous collection of lymph draining the injection site and determination of the cumulative amount of DA absorbed via the lymphatics. Serum and lymph concentrations of DA were determined by ELISA. The fraction of the dose absorbed into the lymphatics (F (lymph)) relative to the fraction absorbed directly into the blood (F (blood)) was determined using a compartmental approach.

resultsDose-linear pharmacokinetics was observed within the dose range investigated. The bioavailability was virtually complete following SC injection into the interdigital space (88.4 +/- 15.7%). A high proportion of the administered dose was recovered in peripheral lymph (90.2 +/- 4.4%) resulting in a substantial reduction in the systemic availability in lymph cannulated animals (3.7%).

conclusionThe high recovery of DA in the peripheral lymph demonstrated near complete absorption of this recombinant protein via the lymphatics in a lymph cannulated sheep model.

Indexed as

AbsorptionAlgorithmsAnimalsArea Under CurveBiological AvailabilityDarbepoetin alfaEnzyme-Linked Immunosorbent AssayErythropoietinHalf-LifeInjections, IntravenousInjections, SubcutaneousLymphatic SystemMaleNonlinear DynamicsSheepDarbepoetin alfaErythropoietin

Identifiers

PMID16951999
OpenAlexW2055630842

What OpenQuestion holds

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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.