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Pathology, Venous Disease, and Clinical Correlations (PAVEDI)

15. juni 2020 opdateret af: Prof. Raffaele Serra, MD, Ph.D., University of Catanzaro

Clinical and Pathological Correlations in Chronic Venous Disease

Chronic Venous Disease (CVD) has a high prevalence in the general population of the western world. Varicose veins are the main signs of this disease that are characterized by important pathological vessel wall changes. There are also several symptoms that affect the quality of life of affected patients. The aim of this study is to correlate the main histopathological abnormalities with the type and the intensity of the symptoms.

Studieoversigt

Status

Ukendt

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

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.

Undersøgelsestype

Observationel

Tilmelding (Forventet)

100

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Italien
      • Catanzaro, Italien, 88100
        • Rekruttering
        • CIFL- Interuniversity Center of Phlebolymphology
      • Catanzaro, Italien, 88100
        • Rekruttering
        • University Magna Graecia of Catanzaro

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år og ældre (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

Patients with varicose veins that are scheduled to undergo surgery for varicose veins removal.

Beskrivelse

Inclusion Criteria:

  • Patients with varicose veins scheduled for surgery

Exclusion Criteria:

  • Peripheral artery disease
  • Malignancy

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Observationsmodeller: Kohorte
  • Tidsperspektiver: Tværsnit

Kohorter og interventioner

Gruppe / kohorte
Intervention / Behandling
Patients with varicose veins
Patients with varicose veins and eligible to receive open surgery (stab avulsion of varicose veins) as routinely care.
Procedure: Stab Avulsion of varicose veins
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.
Andre navne:
  • Phlebectomy
Diagnostisk test: Histopathologic evaluation of varicose veins
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.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Expression of Matrix Metalloproteinase-9 (MMP-9)
Tidsramme: 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)
Tidsramme: 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
Tidsramme: 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)
Tidsramme: 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

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Correlation of the biomarkers expression with signs and symptoms
Tidsramme: 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.

Samarbejdspartnere og efterforskere

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Sponsor

University of Catanzaro

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

1. december 2019

Primær færdiggørelse (Forventet)

1. september 2020

Studieafslutning (Forventet)

1. oktober 2020

Datoer for studieregistrering

Først indsendt

15. juni 2020

Først indsendt, der opfyldte QC-kriterier

15. juni 2020

Først opslået (Faktiske)

18. juni 2020

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

18. juni 2020

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

15. juni 2020

Sidst verificeret

1. juni 2020

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • ER.ALL.2018.11

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