Related Experiment Video

Updated: Jun 11, 2026

Stenosis of the Inferior Vena Cava: A Murine Model of Deep Vein Thrombosis
05:37

Stenosis of the Inferior Vena Cava: A Murine Model of Deep Vein Thrombosis

Published on: December 22, 2017

Inhibitory effect of TIMP influences the morphology of varicose veins

B Aravind1, B Saunders, T Navin

  • 1Department of Surgery and Cancer, Faculty of Medicine, Imperial College, and Department of Histopathology, Charing Cross Hospital, London, UK.

European Journal of Vascular and Endovascular Surgery : the Official Journal of the European Society for Vascular Surgery
|July 6, 2010
PubMed
Abstract

Insights

Increased tissue inhibitor of metalloproteinases (TIMP) expression correlates with thicker varicose veins. Higher TIMP levels promote connective tissue buildup, altering vein wall structure and reducing matrix turnover.

Area of Science:

  • Vascular biology
  • Biochemistry
  • Histopathology

Background:

  • Matrix metalloproteinases (MMPs) and their inhibitors (TIMPs) regulate extracellular matrix turnover.
  • Imbalances in MMP/TIMP activity are implicated in various pathological conditions, including vascular diseases.
  • Varicose veins are characterized by structural abnormalities of the vein wall.

Purpose of the Study:

  • To investigate the correlation between histological changes in varicose vein walls and the expression of MMPs and TIMPs.
  • To determine if alterations in MMP/TIMP expression contribute to the pathogenesis of varicose veins.

Main Methods:

  • Immunohistochemical analysis of MMP-2, MT1-MMP, TIMP-2, and TIMP-3 expression in varicose veins (n=26) and control veins (n=24).
  • Measurement of varicose vein wall thickness to categorize them as atrophic or hypertrophic.
  • Quantitative analysis of immunopositive areas for MMP and TIMP expression.

Main Results:

  • Significantly higher TIMP-2 expression was observed in varicose veins compared to control veins.
  • TIMP-2 and TIMP-3 expression levels were elevated in hypertrophic varicose vein segments and proximal segments compared to atrophic and distal segments, respectively.
  • Increased TIMP-2 expression correlated with connective tissue accumulation in the tunica media.

Conclusions:

  • Histological changes in varicose vein walls are associated with an altered MMP/TIMP balance.
  • Elevated TIMP expression appears to favor connective tissue deposition, leading to thicker vein walls.
  • This suggests that increased TIMP activity contributes to varicose vein development by suppressing protease activity and reducing matrix turnover.

More Related Videos

Procedure for Human Saphenous Veins Ex Vivo Perfusion and External Reinforcement09:50

Procedure for Human Saphenous Veins Ex Vivo Perfusion and External Reinforcement

Published on: October 1, 2014

Transcutaneous Neuromuscular Electrical Stimulation for Treating Varicocele-Induced Scrotal Pain03:19

Transcutaneous Neuromuscular Electrical Stimulation for Treating Varicocele-Induced Scrotal Pain

Published on: August 30, 2024

Related Concept Videos

Venous Thrombosis I: Introduction01:30

Venous Thrombosis I: Introduction

Venous thrombosis, the most common disorder of the veins, involves the formation of a thrombus or blood clot associated with vein inflammation. It can be classified as either superficial vein thrombosis or deep vein thrombosis.Superficial Vein Thrombosis: This involves the formation of a thrombus in a superficial vein, usually the greater or lesser saphenous vein. Though less severe than deep vein thrombosis (DVT), SVT can lead to complications if untreated.Deep Vein Thrombosis (DVT): This...
Varicose Veins I: Introduction01:26

Varicose Veins I: Introduction

Varicose veins, or varicosities, are abnormally dilated and twisted superficial veins caused by venous valve incompetence. This condition commonly affects the lower extremities, especially the saphenous veins, due to the higher pressure from prolonged standing and walking. However, varicosities can also occur in other areas, such as the esophagus, vulva, spermatic cords, and anorectal region.Etiology and typesPrimary varicose veins, often idiopathic, are more common in women due to inherent...
Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies01:20

Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies

The key difference between Superficial Vein Thrombosis (SVT) and Deep Vein Thrombosis (DVT) lies in their location and severity.Clinical ManifestationsSVT typically presents with localized pain, tenderness, and redness along the course of a superficial vein, often accompanied by a palpable, cord-like structure under the skin. This condition is usually less dangerous than DVT but can be uncomfortable and may lead to complications such as cellulitis or, rarely, a clot extension into the deep...
Varicose Veins II: Diagnostic Studies and Interprofessional Care01:26

Varicose Veins II: Diagnostic Studies and Interprofessional Care

Varicose veins, or varicosities, develop when the valves in the veins, which control blood flow, weaken or damage. It causes blood to pool and the veins to enlarge. Understanding the clinical manifestations, diagnostic approaches, and management options for varicose veins is crucial for effective treatment and relief.Clinical manifestationsClinical manifestations of varicose veins include a heavy, achy feeling or pain after prolonged standing or sitting. This discomfort can often be relieved by...
Venous Thrombosis III: Interprofessional Care01:29

Venous Thrombosis III: Interprofessional Care

Venous thrombosis requires effective prevention and treatment strategies to improve patient outcomes and reduce potential complications.Prevention StrategiesHealthcare providers must prioritize preventing venous thromboembolism (VTE) for all adult patients upon admission. Interventions depend on bleeding and thrombosis risk, medical history, current medications, diagnoses, planned procedures, and patient preferences. Patients on bed rest should change positions every two hours and, if not...
Regulation of Angiogenesis and Blood Supply01:24

Regulation of Angiogenesis and Blood Supply

Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl hydroxylase and factor...