Evidence map›Paper›PMID 19926812›Full record

ArticleAmerican journal of physiology. Gastrointestinal and liver physiology2010

Rhythmic changes in colonic motility are regulated by period genes.

Willemijntje A Hoogerwerf, Vahakn B Shahinian, Germaine Cornélissen, Franz Halberg, Jonathon Bostwick, John Timm, Paul A Bartell, Vincent M Cassone

Open access · greenAbstract read
In one paragraph

Article in American journal of physiology. Gastrointestinal and liver physiology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 50 papers.

0numbers the graph read from it
0cells of the map it votes in
50citing papers in PubMed
1.4field-weighted citation impact, top 23% 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

50 citing papers in PubMed, 86 citations in OpenAlex.

  1. Review
  2. Article
  3. Expression of gastrointestinal clock genes and associated hormones levels in hibernating and non-hibernating Daurian ground squirrels.Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2026
    Article
  4. Review
  5. Article
  6. Article
  7. Circadian rhythm and whole gut transit in mice.Neurogastroenterology and motility · 2024
    Article
  8. Article
  9. Circadian rhythms in colonic function.Frontiers in physiology · 2023
    Review
  10. Review
  11. Article
  12. Article
  13. Review
  14. Article
  15. Article
  16. Circadian clocks in the digestive system.Nature reviews. Gastroenterology & hepatology · 2021
    Review
  17. Article
  18. Review
  19. Review
  20. 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

8 authors at 5 institutions in 1 country.

Willemijntje A HoogerwerfDepartment of Internal Medicine, Division of Gastroenterology, University of Michigan, VA Ann Arbor Healthcare System, 2215 Fuller Rd., Ann Arbor, MI 48105, USA. willemij@umich.edu
Vahakn B Shahinian
Germaine Cornélissen
Franz Halberg
Jonathon Bostwick
John Timm
Paul A Bartell
Vincent M Cassone
VA Ann Arbor Healthcare System · USUniversity of Minnesota · USPennsylvania State University · USUniversity of Kentucky · USUniversity of Michigan–Ann Arbor · US

Funding

Role of clock genes in colonic motilityR21DK074477 · NIDDK · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI OWYANG, CHUNG · 2007 to 2010
$406k
NIDDK NIH HHS R21 DK074477
6 · The paper itself

Abstract

Human bowel movements usually occur during the day and seldom during the night, suggesting a role for a biological clock in the regulation of colonic motility. Research has unveiled molecular and physiological mechanisms for biological clock function in the brain; less is known about peripheral rhythmicity. This study aimed to determine whether clock genes such as period 1 (per1) and period2 (per2) modulate rhythmic changes in colonic motility. Organ bath studies, intracolonic pressure measurements, and stool studies were used to examine measures of colonic motility in wild-type and per1per2 double-knockout mice. To further examine the mechanism underlying rhythmic changes in circular muscle contractility, additional studies were completed in neuronal nitric oxide synthase (nNOS) knockout mice. Intracolonic pressure changes and stool output in vivo, and colonic circular muscle contractility ex vivo, are rhythmic with greatest activity at the start of night in nocturnal wild-type mice. In contrast, rhythmicity in these measures was absent in per1per2 double-knockout mice. Rhythmicity was also abolished in colonic circular muscle contractility of wild-type mice in the presence of N(omega)-nitro-L-arginine methyl ester and in nNOS knockout mice. These findings suggest that rhythms in colonic motility are regulated by both clock genes and a nNOS-mediated inhibitory process and suggest a connection between these two mechanisms.

Indexed as

AnimalsBiological ClocksCircadian RhythmColonDarknessDefecationEatingFecesGastrointestinal MotilityMiceMice, KnockoutMuscle ContractionMuscle, SmoothNeural InhibitionNitric Oxide Synthase Type IPeriod Circadian ProteinsNitric Oxide Synthase Type INos1 protein, mousePer1 protein, mousePer2 protein, mousePeriod Circadian Proteins

Identifiers

PMID19926812
PMCPMC2822504
OpenAlexW2088539291

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.