Evidence map›Paper›PMID 29725829›Full record

ArticleJournal of anesthesia2018

Involvement of acute neuroinflammation in postoperative delirium-like cognitive deficits in rats.

Takashi Kawano, Daiki Yamanaka, Bun Aoyama, Hiroki Tateiwa, Marie Shigematsu-Locatelli, Atsushi Nishigaki, Hideki Iwata, Fabricio M Locatelli, Masataka Yokoyama

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Article in Journal of anesthesia, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 1 pooled it
–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

24 citing papers in PubMed, 1 synthesis or guideline pooled it.

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  9. Systemic inflammation, neuroinflammation and perioperative neurocognitive disorders.Inflammation research : official journal of the European Histamine Research Society ... [et al.] · 2023
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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

9 authors.

Takashi KawanoDepartment of Anesthesiology and Intensive Care Medicine, Kochi Medical School, Kohasu, Oko-cho, Nankoku, Kochi, 783-8505, Japan. takashika@kochi-u.ac.jp.
Daiki YamanakaDepartment of Anesthesiology and Intensive Care Medicine, Kochi Medical School, Kohasu, Oko-cho, Nankoku, Kochi, 783-8505, Japan.
Bun AoyamaDepartment of Anesthesiology and Intensive Care Medicine, Kochi Medical School, Kohasu, Oko-cho, Nankoku, Kochi, 783-8505, Japan.
Hiroki TateiwaDepartment of Anesthesiology and Intensive Care Medicine, Kochi Medical School, Kohasu, Oko-cho, Nankoku, Kochi, 783-8505, Japan.
Marie Shigematsu-LocatelliDepartment of Anesthesiology and Intensive Care Medicine, Kochi Medical School, Kohasu, Oko-cho, Nankoku, Kochi, 783-8505, Japan.
Atsushi NishigakiDepartment of Anesthesiology and Intensive Care Medicine, Kochi Medical School, Kohasu, Oko-cho, Nankoku, Kochi, 783-8505, Japan.
Hideki IwataDepartment of Anesthesiology and Intensive Care Medicine, Kochi Medical School, Kohasu, Oko-cho, Nankoku, Kochi, 783-8505, Japan.
Fabricio M LocatelliDepartment of Anesthesiology and Intensive Care Medicine, Kochi Medical School, Kohasu, Oko-cho, Nankoku, Kochi, 783-8505, Japan.
Masataka YokoyamaDepartment of Anesthesiology and Intensive Care Medicine, Kochi Medical School, Kohasu, Oko-cho, Nankoku, Kochi, 783-8505, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe purpose of this study was to investigate the age-, time-, and brain region-dependent postoperative neuroinflammatory trajectory, and its association with neurocognitive outcomes in rats.

methodsAdult and aged rats were randomly assigned to one of three groups: control, isoflurane anesthesia alone, and isoflurane anesthesia with abdominal surgery. On either postoperative day 2 (early phase) or 7 (late phase), all rats were tested for trace and context fear memory retention after acquisition of trace fear conditioning. Freezing behavior was used as an index of fear memory. Following the cognitive testing, the levels of pro-inflammatory cytokines in several brain regions were measured using enzyme-linked immunosorbent assay (n = 8 in each group).

resultsIn the early postoperative period, surgery under isoflurane anesthesia induced acute neuroinflammation along with related trace and context memory dysfunction. Such acute neuroinflammatory responses were comparably observed in both adult and aged animals, whereas the aged rats were more likely to exhibit behavioral changes. On the other hand, in the late postoperative period, neither neuroinflammation in all tested brain regions nor concomitant memory decline were found in adult animals. Significant neuroinflammation was detected only in the hippocampus of aged rats, which was associated with context, but not trace memory dysfunction.

conclusionOur findings indicate that surgery-induced acute, transient, brain-wide neuroinflammation may be involved in the pathogenesis of the postoperative delirium-like cognitive deficits in rats. Furthermore, neuroinflammation may convert from acute to chronic in an age- and hippocampal-specific manner, likely resulting in the development of sustained cognitive dysfunction.

Indexed as

AnimalsBrainCognitionCognition DisordersCognitive DysfunctionCytokinesDeliriumFearHippocampusIsofluraneMaleMemoryRatsRats, WistarCytokinesIsofluraneAttentionCognitive dysfunctionFear memoryNeuroinflammationPostoperative delirium

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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.