Evidence map›Paper›PMID 29695564›Full record

ArticleIn vivo (Athens, Greece)

Diurnal Variation of Melatonin Concentration in the Cerebrospinal Fluid of Unanesthetized Microminipig.

Masaharu Abe, Hiroaki Kawaguchi, Naoki Miura, Kohei Akioka, Miharu Ushikai, Sayumi Oi, Airo Yukawa, Tetsuya Yoshikawa, Hiroyuki Izumi, Masahisa Horiuchi

Open access · diamondAbstract read
In one paragraph

Article in In vivo (Athens, Greece). The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 1 pooled it
0.3field-weighted citation impact, top 46% 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

7 citing papers in PubMed, 1 synthesis or guideline pooled it, 7 citations in OpenAlex.

  1. Melatonin-Measurement Methods and the Factors Modifying the Results. A Systematic Review of the Literature.International journal of environmental research and public health · 2020
    Pooled it
  2. Article
  3. Review
  4. Review
  5. In vivo (Athens, Greece)
    Article
  6. Article
  7. In vivo (Athens, Greece)
    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

10 authors at 3 institutions in 1 country.

Masaharu AbeDepartment of Hygiene and Health Promotion Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan.
Hiroaki KawaguchiDepartment of Hygiene and Health Promotion Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan k3038952@kadai.jp masakun@m.kufm.kagoshima-u.ac.jp.
Naoki MiuraVeterinary Teaching Hospital, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima, Japan.
Kohei AkiokaLaboratory of Veterinary Histopathology, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima, Japan.
Miharu UshikaiDepartment of Hygiene and Health Promotion Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan.
Sayumi OiShin Nippon Biomedical Laboratories, Ltd., Kagoshima, Japan.
Airo YukawaShin Nippon Biomedical Laboratories, Ltd., Kagoshima, Japan.
Tetsuya YoshikawaShin Nippon Biomedical Laboratories, Ltd., Kagoshima, Japan.
Hiroyuki IzumiShin Nippon Biomedical Laboratories, Ltd., Kagoshima, Japan.
Masahisa HoriuchiDepartment of Hygiene and Health Promotion Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan k3038952@kadai.jp masakun@m.kufm.kagoshima-u.ac.jp.
Shin Nippon Biomedical Laboratories (Japan) · JPKagoshima University · JPKagoshima University Hospital · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND/

aimThe aim of this study was to develop a method for sequentially collecting cerebrospinal fluid (CSF) from an unanesthetized microminipig, which shares many physiological and anatomical similarities with humans, such as diurnality, and investigate the diurnal variation of melatonin concentration in the CSF. MATERIALS AND

methodsA catheter was placed percutaneously into the subarachnoid space of an anesthetized animal, and the tip of the catheter was placed into the cisterna magna under X-ray. We then sequentially collected CSF at light-on and -off times from the unanesthetized animal for several weeks. After catheter placement, a period of one week or more was necessary to relieve the contamination of RBCs in the CSF.

resultsA higher melatonin level in the CSF was noted during lights-off time, and the level was higher than that in the serum.

conclusionThis model of sequential collection of CSF will contribute to research in brain functions.

Indexed as

Circadian RhythmAmino AcidsAnimalsBiomarkersBody TemperatureBrainCathetersCerebrospinal FluidFemaleLocomotionMelatoninSwineSwine, MiniatureTomography, X-Ray ComputedAmino AcidsBiomarkersMelatonincerebrospinal fluidIntrathecal cathetermelatoninminipigswine

Identifiers

PMID29695564
PMCPMC6000775
OpenAlexW3024171208

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.