Pathological Crystallization of Cholesterol in Atherosclerosis

February 4, 2020 updated by: Dr. Chen Speter, Sheba Medical Center
Endarterectomy of the carotid artery procedure will be performed at Sheba Medical center vascular surgery department, followed by fixation and histology. Tissues will then be transferred to Weizmann Institute of Science for observation implementing advanced electron microscopy techniques. Finally, joint evaluation of the results will be carried out, in relation to the patient clinical history.

Study Overview

Status

Unknown

Conditions

Intervention / Treatment

Detailed Description

Human atherosclerotic tissues will be obtained from the Department of Vascular Surgery, Sheba Medical Center. Tissues will be taken from donors undergoing routine endarterectomy procedures.We chose carotid artery as the source for the atheromas, due to its high prevalence and its considerable size.All speciemnts will be studied in Cryo-Scanning Electron Microscopy (Cryo-SEM). Tissues will be observed in hydrated vitrified state, after High Pressure Freezing (HPF) and freeze fracture, as well established in the WIS group. Samples will be observed at -120°C. Cathode-Luminescence (CL) detects a luminescence signal induced by electrons in cholesterol crystals and CE condensed states. It will be implemented herein under cryogenic conditions. Sample preparation is as for cryo-SEM. Cryo-FIB-SEM block face serial imaging allows the acquisition of serial images over large volumes (tens of cubed micrometers), at a relatively high imaging resolution (up to 5nm3 voxel size). Volumes of up to 40x40x40 ml will be imaged with a resolution of up to 10nm. The data will be minimally processed and aligned using FIJI, reconstructed and manually segmented using Avizo Lite 9.2.0 software.

Study Type

Observational

Enrollment (Anticipated)

50

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

patients with carotid stenosis - symptomatic and asymptomatic

Description

Inclusion Criteria:

  • all patients that are being operated on for carotid endarterctomy due to carotid stenosis

Exclusion Criteria:

  • none

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Case-Only
  • Time Perspectives: Other

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
crystallization of cholesterol in atherosclerosis
Time Frame: 3 years
Understand the interrelation between structural, morphological and spatial characteristics of cholesterol crystals found within the atherosclerotic lesion and its maturation and destabilization.
3 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sheba Medical Center

Collaborators

Weizmann Institute of Science

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Anticipated)

May 1, 2020

Primary Completion (Anticipated)

May 1, 2020

Study Completion (Anticipated)

June 30, 2021

Study Registration Dates

First Submitted

February 4, 2020

First Submitted That Met QC Criteria

February 4, 2020

First Posted (Actual)

February 6, 2020

Study Record Updates

Last Update Posted (Actual)

February 6, 2020

Last Update Submitted That Met QC Criteria

February 4, 2020

Last Verified

February 1, 2020

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • SHEBA - 19 - 6467 - MH - CTIL

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

Yes

IPD Plan Description

only the pthological and clinical findings

IPD Sharing Time Frame

2023- forever

IPD Sharing Supporting Information Type

  • Study Protocol
  • Informed Consent Form (ICF)

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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