- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03925753
Correlation Between Autophagy-related Proteins and Inflammatory Markers in Hemodialysis Patients
Correlation Between Autophagy-related Proteins in Peripheral Blood Mononuclear Cells and Inflammatory Markers in Hemodialysis Patients
Study Overview
Status
Conditions
Detailed Description
Study Design and Population
Study Design We shall enroll 30 healthy volunteers as the control group. 180 sex- and age-matched hemodialysis patients will be enrolled in this study. To be included in the study, patients have to be at least 20-years-old and on outpatient hemodialysis (HD) for at least 3 months. Patients are excluded if they had malignancy, severe liver disease (bilirubin >1.6 mg/dl), uncontrolled hypertension, severe obesity (BMI >35), currently on carbamazepine, statins or immunosuppressive agents. The medical record is thoroughly reviewed for each subject by a collaborating physician in the study. All subjects will provide written informed consent to participate and the protocol will be send to the institutional review boards of Tungs' Taichung Metroharbour Hospital
Study Parameters Predialysis blood samples are obtained on a mid-week day. Within 30 min after sampling, the remaining blood is centrifuged at 3,000 g for 10 min, immediately aliquoted and frozen at -80°C until further analysis.
Cytokine assays The following markers of inflammation and hemostasis are determined by ELISA in patients' sera: interleukin-6 (Quantikine, R&D Systems,) and plasma concentrations of CRP in a highly sensitive assay (hsCRP).
Analysis of lipids/lipoproteins Total cholesterol, highdensity lipoprotein (HDL) cholesterol, and triglyceride concentrations are determined enzymatically. Plasma glucose is measured by a glucose-oxidase method.
Measurements of Liposaccharide-binding protein (LBP) The LBP was determined from serum samples and controls using standardized enzymelinked immunosorbent assay (ELISA) methods, and serum from normal control subjects was used for interassay variation.
Isolation of PBMCs Ethylenediamine tetraacetic acid Vacutainer™ tubes are used to collect venous blood samples (10 ml) from fasting participants in the early morning. Aliquots of the supernatant are collected by centrifugation at 800 x g and 25˚C for 15 min and subsequently store at -80˚C. The remaining blood is mixed and add slowly dropwise to a centrifuge tube containing 10 ml of Ficoll separation medium. PBMCs are isolated according to manufacturer's protocol and store at -80˚C.
Western blotting PBMCs are lysed with RIPA lysis buffer and protein concentrations determined with the BCA Protein Assay kit according to the manufacturer's protocol. Subsequently, 20 μg of protein/well are separated using 12% SDS-PAGE. The proteins are subsequently transferred to nitrocellulose membranes at 300 mA for 60 min. The nitrocellulose membranes are blocked with Tris-buffered saline containing 0.1% Tween 20 (TBST) and 5% non-fat milk powder for 2 h at room temperature. The nitrocellulose membranes are incubated with primary antibodies overnight at 4˚C on a shaker set at a slow speed. The nitrocellulose membranes are washed thrice with TBST and incubated with secondary antibodies for 1 h at room temperature. After washing thrice, ECL substrate is added to the nitrocellulose membrane. The signal is detected using Image Lab™ software and band density will be quantified with imager software .
The primary antibodies against microtubule-associated proteins 1A/1B light chain 3A , ubiquitin-binding protein p62 and beclin-1 as well as GAPDH will be purchased. Peroxidase-conjugated goat anti-mouse and goat anti-rabbit secondary antibodies are used.
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
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Taichung, Taiwan
- Tungs' Taichung MetroHarbour Hospital
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- Both sexes aged between 20-90 years.
- Received stable hemodialysis at least 3 months.
- Written informed consent.
Exclusion Criteria:
- patients with severe infections, severe heart disease and liver disease, malignancy, autoimmune disorders, severe malnutrition, or clinical conditions requiring oral nutrition supplements;
- Inability to follow protocol.
- Pregnancy or wishing/trying to get pregnant
Study Plan
How is the study designed?
Design Details
- Observational Models: Case-Control
- Time Perspectives: Cross-Sectional
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Levels of the autophagy-associated proteins ubiquitin-binding protein p62 (p62)
Time Frame: 1 years
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ubiquitin-binding protein p62 (p62) in PBMCs will be detected by western blotting.
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1 years
|
Levels of the autophagy-associated proteins microtubule-associated proteins 1A/1B light chain 3A (LC3I/II)
Time Frame: 1 years
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microtubule-associated proteins 1A/1B light in PBMCs will be detected by western blotting.
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1 years
|
Levels of the autophagy-associated proteins beclin-1
Time Frame: 1 years
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beclin-1 in PBMCs will be detected by western blotting.
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1 years
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Analysis of biomarkers of Liposaccharide-binding protein (LBP)
Time Frame: 1 years
|
The LBP was determined from serum samples and controls using standardized enzymelinked immunosorbent assay (ELISA) methods
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1 years
|
Analysis of biomarkers of IL-6
Time Frame: 1 years
|
The IL-6 was determined from serum samples and controls using standardized enzymelinked immunosorbent assay (ELISA) methods was determined from serum samples and controls using standardized enzymelinked immunosorbent assay (ELISA) methods
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1 years
|
Measurements of TNF-α
Time Frame: 1 years
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The TNF-α was determined from serum samples and controls using standardized enzymelinked immunosorbent assay (ELISA) methods
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1 years
|
Collaborators and Investigators
Investigators
- Study Chair: Paik Seong Lim, PhD, Tungs' Taichung MetroHarbour Hospital
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Other Study ID Numbers
- 107054
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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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