Evidence map›Paper›PMID 36978127›Full record

ArticleFluids and barriers of the CNS2023

Immunohistochemical visualization of lymphatic vessels in human dura mater: methodological perspectives.

César Luis Vera Quesada, Shreyas Balachandra Rao, Reidun Torp, Per Kristian Eide

Registry-linked trialOpen access · goldFull text read
In one paragraph

Article in Fluids and barriers of the CNS, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06852352 (A Prospective, Single-center, Single-arm, Exploratory, 24-Month Study to Confirm Efficacy of Modified Deep Cervical Lymphovenous Anastomosis), which is not on this map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
3.1field-weighted citation impact, top 8% 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.

NCT06852352 narecruitingnot on this mapstarted 2025, after this paper: background citation

A Prospective, Single-center, Single-arm, Exploratory, 24-Month Study to Confirm Efficacy of Modified Deep Cervical Lymphovenous Anastomosis (LVA) in Subjects With Alzheimer's Disease/ Parkinson's Disease

TypeinterventionalSponsorZhejiang Provincial People's HospitalRan2025 to 2028Enrolled160ConditionsAlzheimer Disease, Parkinson DiseaseArmsModified deep cervical Lymphatic-Venous Anastomosis
3 · Its place in the literature

Who cites it

16 citing papers in PubMed, 21 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Discovery of Abundant Nano-scale Lymphatic-like Vessels in Brains.bioRxiv : the preprint server for biology · 2026
    Article
  5. Article
  6. Review
  7. Review
  8. Review
  9. Aquaporins in the Capillaries of the Dura Mater of Pigs.International journal of molecular sciences · 2025
    Article
  10. Review
  11. Review
  12. Article
  13. Review
  14. Article
  15. Article
  16. 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 at 2 institutions in 1 country.

César Luis Vera QuesadaDepartment of Neurosurgery, Oslo University Hospital-Rikshospitalet, PB 4950 Nydalen, Oslo, 0424, Norway.
Shreyas Balachandra RaoDivision of Anatomy, Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway.
Reidun TorpDivision of Anatomy, Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway.
Per Kristian EideDepartment of Neurosurgery, Oslo University Hospital-Rikshospitalet, PB 4950 Nydalen, Oslo, 0424, Norway. p.k.eide@medisin.uio.no.
University of Oslo · NOOslo University Hospital · NO

Funding

Health South-East, Norway 2021004
6 · The paper itself

Abstract

backgroundDespite greatly renewed interest concerning meningeal lymphatic function over recent years, the lymphatic structures of human dura mater have been less characterized. The available information derives exclusively from autopsy specimens. This study addressed methodological aspects of immunohistochemistry for visualization and characterization of lymphatic vessels in the dura of patients.

methodsDura biopsies were obtained from the right frontal region of the patients with idiopathic normal pressure hydrocephalus (iNPH) who underwent shunt surgery as part of treatment. The dura specimens were prepared using three different methods: Paraformaldehyde (PFA) 4% (Method #1), paraformaldehyde (PFA) 0.5% (Method #2), and freeze-fixation (Method #3). They were further examined with immunohistochemistry using the lymphatic cell marker lymphatic vessel endothelial hyaluronan receptor 1 (LYVE-1), and as validation marker we used podoplanin (PDPN).

resultsThe study included 30 iNPH patients who underwent shunt surgery. The dura specimens were obtained average 16.1 ± 4.5 mm lateral to the superior sagittal sinus in the right frontal region (about 12 cm posterior to glabella). While lymphatic structures were seen in 0/7 patients using Method #1, it was found in 4/6 subjects (67%) with Method #2, while in 16/17 subjects (94%) using Method #3. To this end, we characterized three types of meningeal lymphatic vessels: (1) Lymphatic vessels in intimate contact with blood vessels. (2) Lymphatic vessels without nearby blood vessels. (3) Clusters of LYVE-1-expressing cells interspersed with blood vessels. In general, highest density of lymphatic vessels were observed towards the arachnoid membrane rather than towards the skull.

conclusionsThe visualization of meningeal lymphatic vessels in humans seems to be highly sensitive to the tissue processing method. Our observations disclosed most abundant lymphatic vessels towards the arachnoid membrane, and were seen either in close association with blood vessels or remote from blood vessels.

Indexed as

Lymphatic VesselsDura MaterFormaldehydeHumansImmunohistochemistryMeningesPolymersFormaldehydeparaformPolymersCerebral meningesHuman dura materMeningeal lymphatic vesselsNeuro-immunology

Identifiers

PMID36978127
PMCPMC10044429
OpenAlexW4361216587

What OpenQuestion holds

Textfull text, public
LicenceCC BY
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Registered trials

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.