IRBOcompClinical and Immunological Patterns of Non-infectious Aortic Graft Inflammation in Bovine vs Non-biological Grafts
Data Collection
Other
Utilizing specific methods not covered by standard models in order to address unique research questions.Summary
Study start date: September 1, 2019
Actual date on which the first participant was enrolled.Part 1 Retrospective database search on subjects that received a Shelhigh graft (n= 116) and subjects that received a mechanical graft (n=50) in a similar time frame, age, gender, co-morbidities, clinical history. Analyzing CT or MRI report at following time intervals: 3 - 6 months postoperatively, 1, 2 and 3 years postoperatively (regular check-up appointments in clinics). Additionally, extraction of following data-set (based on availability): temperature, lab values (C-reactive protein, white blood count, Eosinophil count), pathology report and CT- / MRI- imaging in cases of re-operation. Firstly, identify if there is a graft inflammation (positive / negative group within the bovine group). Secondly, compare to mechanical group. Part 2 Choose 10 + 10 patients of the bovine group (with / without immune response) and 10 of the mechanical group in order to conduct further immunological testing and comparison. The immunological testing will include measurement of immunoglobulin E and immunoglobulin G antibodies against bovine protein, as well as in vitro T cell reactivity in Interleukin 4 and interferon-gamma Elispot. These parameters will characterize whether the patient mounted an adaptive immune response against the bovine protein. In addition, the investigators will measure total immunoglobulin G4 and Interleukin-6 levels in the serum of all patients, as additional inflammation markers. Contact patients to come into clinics for a visit, explain study. Blood sampling (1 serum and 1 EDTA) after patients consent. Material will be sampled and sent in anonymized form via express courier to the Translational Immunology Lab at the University Hospital Basel. Samples will be processed within 24h to isolate peripheral blood mononuclear cells (PBMC) and serum. PBMC and Serum will be cryopreserved at -180°C and -80°C respectively. Samples will be analyzed in batches each including 3-5 subjects per group.
Protocol
This section provides details of the study plan, including how the study is designed and what the study is measuring.30 patients to be enrolled
Total number of participants that the clinical trial aims to recruit.Other
Eligibility
Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.Any sex
Biological sex of participants that are eligible to enroll.Over 18 Years
Range of ages for which participants are eligible to join.Healthy volunteers allowed
If individuals who are healthy and do not have the condition being studied can participate.Criteria
Study Plan
Find out more about all the medication administered in this study, their detailed description and what they involve.Study Objectives
Primary Objectives
Secondary Objectives
Study Centers
These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.This study has 1 location
University Hospital Bern, Inselspital
Bern, SwitzerlandOpen University Hospital Bern, Inselspital in Google Maps