Evidence map›Paper›PMID 22013955›Full record

ArticleBritish journal of pharmacology2012

Using microdialysis to analyse the passage of monovalent nanobodies through the blood-brain barrier.

G Caljon, V Caveliers, T Lahoutte, B Stijlemans, G H Ghassabeh, J Van Den Abbeele, I Smolders, P De Baetselier, Y Michotte, S Muyldermans and 2 more

Open access · bronzeAbstract read
In one paragraph

Article in British journal of pharmacology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed, 1 pooled it
2.9field-weighted citation impact, top 11% 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

30 citing papers in PubMed, 1 synthesis or guideline pooled it, 55 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Article
  6. Review
  7. Article
  8. Review
  9. NANOBODIES®: A Review of Diagnostic and Therapeutic ApplicationsInternational journal of molecular sciences · 2023
    Review
  10. Review
  11. Review
  12. Review
  13. Applications of nanobodies in brain diseases.Frontiers in immunology · 2022
    Review
  14. Article
  15. Review
  16. Article
  17. Review
  18. The Therapeutic Potential of Nanobodies.BioDrugs : clinical immunotherapeutics, biopharmaceuticals and gene therapy · 2020
    Review
  19. Article
  20. Review
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

12 authors at 2 institutions in 1 country.

G CaljonDepartment of Animal Health, Institute of Tropical Medicine Antwerp, Antwerp, Belgium.
V Caveliers
T Lahoutte
B Stijlemans
G H Ghassabeh
J Van Den Abbeele
I Smolders
P De Baetselier
Y Michotte
S Muyldermans
S Magez
R Clinckers
Vrije Universiteit Brussel · BEInstituut voor Tropische Geneeskunde · BE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeNanobodies are promising antigen-binding moieties for molecular imaging and therapeutic purposes because of their favourable pharmacological and pharmacokinetic properties. However, the capability of monovalent nanobodies to reach targets in the CNS remains to be demonstrated. EXPERIMENTAL APPROACH: We have assessed the blood-brain barrier permeability of Nb_An33, a nanobody against the Trypanosoma brucei brucei variant-specific surface glycoprotein (VSG). This analysis was performed in healthy rats and in rats that were in the encephalitic stage of African trypanosomiasis using intracerebral microdialysis, single photon emission computed tomography (SPECT) or a combination of both methodologies. This enabled the quantification of unlabelled and (99m) Tc-labelled nanobodies using, respectively, a sensitive VSG-based nanobody-detection elisa, radioactivity measurement in collected microdialysates and SPECT image analysis. KEY

resultsThe combined read-out methodologies showed that Nb_An33 was detected in the brain of healthy rats following i.v. injection, inflammation-induced damage to the blood-brain barrier, as in the late encephalitic stage of trypanosomiasis, significantly increased the efficiency of passage of the nanobody through this barrier. Complementing SPECT analyses with intracerebral microdialysis improved analysis of brain disposition. There is clear value in assessing penetration of the blood-brain barrier by monovalent nanobodies in models of CNS inflammation. Our data also suggest that rapid clearance from blood might hamper efficient targeting of specific nanobodies to the CNS. CONCLUSIONS AND IMPLICATIONS: Nanobodies can enter the brain parenchyma from the systemic circulation, especially in pathological conditions where the blood-brain barrier integrity is compromised.

Indexed as

NanostructuresAnimalsAntibodies, ProtozoanBlood-Brain BarrierMaleMicrodialysisRatsRats, WistarTechnetium Tc 99m SestamibiTomography, Emission-Computed, Single-PhotonTrypanosoma brucei bruceiTrypanosomiasis, AfricanX-Ray MicrotomographyAntibodies, ProtozoanTechnetium Tc 99m Sestamibi

Identifiers

PMID22013955
PMCPMC3413867
OpenAlexW1575156104

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.