Evidence map›Paper›PMID 34250453›Full record

ArticleVessel plus2021

Mechanisms of Lower Extremity Vein Dysfunction in Chronic Venous Disease and Implications in Management of Varicose Veins.

Joseph D Raffetto, Raouf A Khalil

Open access · diamondAbstract read
In one paragraph

Article in Vessel plus, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed, 1 pooled it
8.6field-weighted citation impact, top 1% 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

33 citing papers in PubMed, 1 synthesis or guideline pooled it, 66 citations in OpenAlex.

  1. Pooled it
  2. Coumarins in hypertension management: from vascular signaling pathways to clinical perspectives.Hypertension research : official journal of the Japanese Society of Hypertension · 2026
    Review
  3. Review
  4. From scientific inquiry to identifying critical research topics in varicose veins pathophysiology.Journal of vascular surgery. Venous and lymphatic disorders · 2026
    Article
  5. Review
  6. Review
  7. Review
  8. Article
  9. Review
  10. A synergistic multimodality treatment approach to address the key drivers of wound chronicity.Journal of vascular surgery. Venous and lymphatic disorders · 2026
    Review
  11. Article
  12. Combined Effects of Diosmin, Hesperidin,International journal of molecular sciences · 2025
    Article
  13. Review
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. 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

2 authors at 1 institution in 1 country.

Joseph D RaffettoVascular Surgery Research Laboratories, Division of Vascular and Endovascular Surgery, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA.
Raouf A KhalilVascular Surgery Research Laboratories, Division of Vascular and Endovascular Surgery, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA.
Brigham and Women's Hospital · US

Funding

Vascular Mechanisms in Pregnancy-Induced HypertensionR01HL065998 · NHLBI · HARVARD UNIVERSITY (MEDICAL SCHOOL) · PI KHALIL, RAOUF A · 2002 to 2016
$4.3M
Vascular Mechanisms of Hypertension-in-PregnancyR01HL147889 · NHLBI · BRIGHAM AND WOMEN'S HOSPITAL · PI KHALIL, RAOUF A · 2020 to 2022
$2.2M
Vascular Mechanisms of Hypertension-in-PregnancyR56HL147889 · NHLBI · BRIGHAM AND WOMEN'S HOSPITAL · PI KHALIL, RAOUF A · 2019 to 2019
$647k
Mechano-Sensitive Hypoxia-Inducible Factor-MMP Pathway in Venous InsufficiencyR21HL111775 · NHLBI · BRIGHAM AND WOMEN'S HOSPITAL · PI KHALIL, RAOUF A · 2013 to 2014
$475k
NHLBI NIH HHS R01 HL065998NHLBI NIH HHS R01 HL147889NHLBI NIH HHS R21 HL111775NHLBI NIH HHS R56 HL147889
6 · The paper itself

Abstract

Chronic venous disease (CVD) is a common venous disorder of the lower extremities. CVD can be manifested as varicose veins (VVs), with dilated and tortuous veins, dysfunctional valves and venous reflux. If not adequately treated, VVs could progress to chronic venous insufficiency (CVI) and lead to venous leg ulcer (VLU). Predisposing familial and genetic factors have been implicated in CVD. Additional environmental, behavioral and dietary factors including sedentary lifestyle and obesity may also contribute to CVD. Alterations in the mRNA expression, protein levels and proteolytic activity of matrix metalloproteinases (MMPs) have been detected in VVs and VLU. MMP expression/activity can be modulated by venous hydrostatic pressure, hypoxia, tissue metabolites, and inflammation. MMPs in turn increase proteolysis of different protein substrates in the extracellular matrix particularly collagen and elastin, leading to weakening of the vein wall. MMPs could also promote venous dilation by increasing the release of endothelium-derived vasodilators and activating potassium channels, leading to smooth muscle hyperpolarization and relaxation. Depending on VVs severity, management usually includes compression stockings, sclerotherapy and surgical removal. Venotonics have also been promoted to decrease the progression of VVs. Sulodexide has also shown benefits in VLU and CVI, and recent data suggest that it could improve venous smooth muscle contraction. Other lines of treatment including induction of endogenous tissue inhibitors of metalloproteinases (TIMPs) and administration of exogenous synthetic inhibitors of MMPs are being explored, and could provide alternative strategies in the treatment of CVD.

Indexed as

Extracellular MatrixMatrix MetalloproteinasesRemodelingVaricose VeinsVascular Smooth Muscle

Identifiers

PMID34250453
PMCPMC8270011
OpenAlexW3182157019

What OpenQuestion holds

Textmetadata
LicenceTDM
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.