- ICH GCP
- Register voor klinische proeven in de VS.
- Klinische proef NCT04436549
Pathology, Venous Disease, and Clinical Correlations (PAVEDI)
Clinical and Pathological Correlations in Chronic Venous Disease
Studie Overzicht
Toestand
Conditie
Interventie / Behandeling
Gedetailleerde beschrijving
Chronic Venous Disease (CVD) of the lower limbs is a widespread chronic condition of the western world. There are several signs and symptoms that affect quality of life of patients with CVD. One of the main signs of this disease are varicose veins that are enlarged, swollen, and twisting superficial veins. Vessel wall of varicose veins shows a significant histopathological phenotype, characterized by a distortion of structural architecture: endothelial damage, disorganization of muscle bundles and alteration of the composition of the extracellular matrix (ECM). Symptoms may be different, according to disease state, progression and local inflammatory processes. To date, there is no study that correlate the type and the intensity of symptoms with histopathological phenotype.
Aim of this study is to correlate histopathological phenotype with clinical manifestations.
A cohort of patients with varicose veins scheduled for open surgical treatment that will undergo to stab avulsion of varicose veins will be recruited. Subsequently, venous tissue from stab avulsion will collected in order to evaluate the following biomarkers: VEGF (Vascular -Endothelial Growth Factor), PGP 9.5 (Protein Gene Product 9.5), Fibronectin and Matrix Metalloproteinase- 9 (MMP-9).
VEGF has a key role as a regulator of angiogenesis; its expression is highly regulated by hypoxia, in this case induced by venous hypertension. In addition to being a marker of neoangiogenesis, it increases vascular permeability in inflammatory disorders. PGP 9.5 is a marker of the innervation of the vessel wall that plays an important role in the regulation of venous tone. Fibronectin and MMP-9 are direct markers of ECM remodeling and impairment and they have also a role in chronic inflammation.
Studietype
Inschrijving (Verwacht)
Contacten en locaties
Studie Locaties
-
-
-
Catanzaro, Italië, 88100
- Werving
- CIFL- Interuniversity Center of Phlebolymphology
-
Catanzaro, Italië, 88100
- Werving
- University Magna Graecia of Catanzaro
-
-
Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
Accepteert gezonde vrijwilligers
Geslachten die in aanmerking komen voor studie
Bemonsteringsmethode
Studie Bevolking
Beschrijving
Inclusion Criteria:
- Patients with varicose veins scheduled for surgery
Exclusion Criteria:
- Peripheral artery disease
- Malignancy
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
- Observatiemodellen: Cohort
- Tijdsperspectieven: Dwarsdoorsnede
Cohorten en interventies
Groep / Cohort |
Interventie / Behandeling |
|---|---|
|
Patients with varicose veins
Patients with varicose veins and eligible to receive open surgery (stab avulsion of varicose veins) as routinely care.
|
Stab avulsion is a technique to remove varicose veins.
In this procedure, several tiny cuts (incisions) are made in the skin through which the varicosed vein is removed.
Removed varicose veins will be collected and analyzed.
Andere namen:
Sample obtained from varicose veins of lower limbs of patients will be collected and immediately fixed in formalin.
The tissue fragments will be taken from varicose veins.
Subsequently the tissue will be embedded in paraffin and 3-to-4 mm thick sections will be prepared by a microtome.
The tissue sections will be processed for histological and immunohistochemical studies of VEGF, MM9, PGP 9.5 AND FRIBRONECTIN.
For antibodies the EnVision staining system (Dako EnVision™) will be used.
For the analysis of the positive structures detected by immunohistochemistry, a semiquantitative evaluation method will be used.
|
Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
|
Expression of Matrix Metalloproteinase-9 (MMP-9)
Tijdsspanne: at 10 month
|
EnVision staining system (Dako EnVision™) will be used.
A synthetic peptide from the middle region of human MMP9 will be used with dilutions 1:50 with Ethylenediaminetetraacetic acid (EDTA).
|
at 10 month
|
|
Expression of Vascular Endothelial Growth Factor (VEGF)
Tijdsspanne: at 10 month
|
EnVision staining system (Dako EnVision™) will be used.
Monoclonal mouse Anti-Human vascular endothelial growth factor, code No. M7273 will be used with dilution 1:50 with Ethylenediaminetetraacetic acid (EDTA).
|
at 10 month
|
|
Expression of Fibronectin
Tijdsspanne: at 10 month
|
EnVision staining system (Dako EnVision™) will be used.
A synthetic peptide made toward the C-terminal region of the human Fibronectin protein (within residues 2250-2300) will be used with dilution 1:400 citrate buffer.
|
at 10 month
|
|
Expression of Protein Gene Product 9.5 (PGP 9.5)
Tijdsspanne: at 10 month
|
EnVision staining system (Dako EnVision™) will be used.
Purified PGP 9.5 isolated from bovine brain will be used with dilution 1:200 citrate buffer
|
at 10 month
|
Secundaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
|
Correlation of the biomarkers expression with signs and symptoms
Tijdsspanne: At 11 month.
|
The expression of the biomarkers that will be studied on venous tissue samples will be correlated with the type of signs and symptoms complained by the patients.
|
At 11 month.
|
Medewerkers en onderzoekers
Sponsor
Publicaties en nuttige links
Algemene publicaties
- Birdina J, Pilmane M, Ligers A. The Morphofunctional Changes in the Wall of Varicose Veins. Ann Vasc Surg. 2017 Jul;42:274-284. doi: 10.1016/j.avsg.2016.10.064. Epub 2017 Mar 11.
- Kucukguven A, Khalil RA. Matrix metalloproteinases as potential targets in the venous dilation associated with varicose veins. Curr Drug Targets. 2013 Mar;14(3):287-324.
- Kolano P, Bednarski IA, Lesiak A, Skibinska M, Stasikowska-Kanicka O, Danilewicz M, Narbutt J. Overexpression of cathepsin K and vascular endothelial growth factor in chronic venous ulcerations. Postepy Dermatol Alergol. 2020 Apr;37(2):234-239. doi: 10.5114/ada.2020.94840. Epub 2020 May 6.
Studie record data
Bestudeer belangrijke data
Studie start (Werkelijk)
Primaire voltooiing (Verwacht)
Studie voltooiing (Verwacht)
Studieregistratiedata
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Werkelijk)
Updates van studierecords
Laatste update geplaatst (Werkelijk)
Laatste update ingediend die voldeed aan QC-criteria
Laatst geverifieerd
Meer informatie
Termen gerelateerd aan deze studie
Trefwoorden
Aanvullende relevante MeSH-voorwaarden
Andere studie-ID-nummers
- ER.ALL.2018.11
Plan Individuele Deelnemersgegevens (IPD)
Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?
Informatie over medicijnen en apparaten, studiedocumenten
Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel
Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct
Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .