Evidence map›Paper›PMID 22595990›Full record

ArticleAmerican journal of physiology. Gastrointestinal and liver physiology2012

Hyperhomocysteinemia decreases intestinal motility leading to constipation.

S Givvimani, C Munjal, N Narayanan, F Aqil, G Tyagi, N Metreveli, S C Tyagi

Open access · greenAbstract read
In one paragraph

Article in American journal of physiology. Gastrointestinal and liver physiology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
1.9field-weighted citation impact, top 14% 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

17 citing papers in PubMed, 30 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Early detection of Alzheimer's disease using the MEMORIES mnemonic.Chronic diseases and translational medicine · 2025
    Review
  5. Article
  6. Article
  7. Review
  8. Article
  9. RSC advances · 2020
    Article
  10. Betaine-homocysteineFASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2019
    Article
  11. Review
  12. Review
  13. Review
  14. Article
  15. Article
  16. Article
  17. Homocysteine imbalance: a pathological metabolic marker.Advances in nutrition (Bethesda, Md.) · 2012
    Review
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

7 authors at 1 institution in 1 country.

S GivvimaniDepartment of Physiology and Biophysics, University of Louisville School of Medicine, Louisville, Kentucky 40202, USA. s0givv01@louisville.edu
C Munjal
N Narayanan
F Aqil
G Tyagi
N Metreveli
S C Tyagi
University of Louisville · US

Funding

Mechanism of Vascular Remodeling in HyperhomocysteinemiaR01HL071010 · NHLBI · UNIVERSITY OF MISSISSIPPI MEDICAL CENTER · PI TYAGI, SURESH C. · 2002 to 2010
$2.7M
NHLBI NIH HHS HL-71010NINDS NIH HHS NS-51568
6 · The paper itself

Abstract

Elevated levels of plasma homocysteine (Hcy) called hyperhomocysteinemia (HHcy) have been implicated in inflammation and remodeling in intestinal vasculature, and HHcy is also known to aggravate the pathogenesis of inflammatory bowel disease (IBD). Interestingly, colon is the pivotal site that regulates Hcy levels in the plasma. We hypothesize that HHcy decreases intestinal motility through matrix metalloproteinase-9 (MMP-9)-induced intestinal remodeling leading to constipation. To verify this hypothesis, we used C57BL/6J or wild-type (WT), cystathionine β-synthase (CBS(+/-)), MMP-9(-/-), and MMP-9(-/-) + Hcy mice. Intestinal motility was assessed by barium meal studies and daily feces output. Plasma Hcy levels were measured by HPLC. Expression of ICAM-1, inducible nitric oxide synthase, MMP-9, and tissue inhibitors of MMPs was studied by Western blot and immunohistochemistry. Reactive oxygen species (ROS) including super oxide were measured by the Invitrogen molecular probe method. Tissue nitric oxide levels were assessed by a commercially available kit. Plasma Hcy levels in the treated MMP-9 group mice were comparable to CBS(+/-) mice. Barium meal studies suggest that intestinal motility is significantly decreased in CBS(+/-) mice compared with other groups. Fecal output-to-body weight ratio was significantly reduced in CBS(+/-) mice compared with other groups. There was significant upregulation of MMP-9, iNOS, and ICAM-1 expression in the colon from CBS(+/-) mice compared with WT mice. Levels of ROS, superoxide, and inducible nitric oxide were elevated in the CBS(+/-) mice compared with other groups. Results suggest that HHcy decreases intestinal motility due to MMP-9-induced intestinal remodeling leading to constipation.

Indexed as

AnimalsColonConstipationCystathionine beta-SynthaseFecesGastrointestinal MotilityHyperhomocysteinemiaIntercellular Adhesion Molecule-1MaleMatrix Metalloproteinase 9MiceMice, Inbred C57BLNitric Oxide Synthase Type IITissue Inhibitor of Metalloproteinase-1Cystathionine beta-SynthaseIntercellular Adhesion Molecule-1Matrix Metalloproteinase 9Nitric Oxide Synthase Type IINos2 protein, mouseTimp1 protein, mouseTissue Inhibitor of Metalloproteinase-1

Identifiers

PMID22595990
PMCPMC3423105
OpenAlexW2150133646

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.