Evidence map›Paper›PMID 19091002›Full record

ReviewBMC neuroscience2008

Intranasal delivery bypasses the blood-brain barrier to target therapeutic agents to the central nervous system and treat neurodegenerative disease.

Leah R Hanson, William H Frey

Open access · goldAbstract readReview
In one paragraph

Review in BMC neuroscience, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 312 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
312citing papers in PubMed, 3 pooled it
6.8field-weighted citation impact, top 2% 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

312 citing papers in PubMed, 3 syntheses or guidelines pooled it, 674 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Trial
  5. Trial
  6. NeuroEPO plus (NeuralCIMAlzheimer's research & therapy · 2023
    Trial
  7. Article
  8. Article
  9. Review
  10. Review
  11. Review
  12. Article
  13. Article
  14. Review
  15. Article
  16. Article
  17. Time- and Region-Specific Effects of Intranasal Insulin on Oxidative Stress Parameters in the Rat Brain.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2026
    Article
  18. Hypothalamic wars: the last nanodelivery.Reviews in endocrine & metabolic disorders · 2026
    Review
  19. Article
  20. Review

252 more citing papers are in PubMed but not listed here.

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

2 authors at 1 institution in 1 country.

Leah R HansonAlzheimer's Research Center at Regions Hospital, HealthPartners Research Foundation, 640 Jackson Street, St, Paul, MN 55101, USA.
William H Frey
Regions Hospital · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Intranasal delivery provides a practical, non-invasive method of bypassing the blood-brain barrier (BBB) to deliver therapeutic agents to the brain and spinal cord. This technology allows drugs that do not cross the BBB to be delivered to the central nervous system within minutes. It also directly delivers drugs that do cross the BBB to the brain, eliminating the need for systemic administration and its potential side effects. This is possible because of the unique connections that the olfactory and trigeminal nerves provide between the brain and external environment. Intranasal delivery does not necessarily require any modification to therapeutic agents. A wide variety of therapeutics, including both small molecules and macromolecules, can be targeted to the olfactory system and connected memory areas affected by Alzheimer's disease. Using the intranasal delivery system, researchers have reversed neurodegeneration and rescued memory in a transgenic mouse model of Alzheimer's disease. Intranasal insulin-like growth factor-I, deferoxamine, and erythropoietin have been shown to protect the brain against stroke in animal models. Intranasal delivery has been used to target the neuroprotective peptide NAP to the brain to treat neurodegeneration. Intranasal fibroblast growth factor-2 and epidermal growth factor have been shown to stimulate neurogenesis in adult animals. Intranasal insulin improves memory, attention, and functioning in patients with Alzheimer's disease or mild cognitive impairment, and even improves memory and mood in normal adult humans. This new method of delivery can revolutionize the treatment of Alzheimer's disease, stroke, and other brain disorders.

Indexed as

Administration, IntranasalAnimalsBlood-Brain BarrierCentral Nervous System AgentsDisease Models, AnimalDrug Administration RoutesDrug Delivery SystemsHumansNeurodegenerative DiseasesStrokeCentral Nervous System Agents

Identifiers

PMID19091002
PMCPMC2604883
OpenAlexW2050167321

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.