Physiologic Research (BWH)
Director: Hollenberg, Norman K., MD, Ph.D.; Barkoudah, Ebrahim, MD, MPH
Location: Brigham and Women's Hospital, Peter Bent Building, Department of Radiology, Physiologic Research Division, RA-126, 15 Francis Street, Boston, MA 02115
Our lab offers two renal function assays for measurement of renal plasma flow (RPF) and glomerular filtration rate (GFR) to analyze human kidney function. The RPF assay measures the clearance of para-aminohippurate (PAH) and the GFR assay measures clearance of Inulin. Our lab also offers pickup and storage of samples for study groups.
Our lab conducts clinical research with a specific focus on diabetes, hypertension, nephrology and the renin-angiotensin system (RAS). The assay services would be helpful to clinical researchers involved in these fields. PAH plasma clearance which provides accurate measure of RPF requires placement of two IV’s, one in each arm. In one of these IV’s, PAH is infused at a rate dependent on the research participants current weight. The infusion continues for a period of time as specified in a study protocol. At certain specified time points, blood samples are obtained from the second IV. These blood samples are processed and the remaining sample is the plasma. This is retrieved by our lab and stored at 20°C until it is assayed. This process is the same for the Inulin assay for measurement of GFR. The difference is that Inutest is infused instead of PAH in one of the two IV’s. To measure Inulin clearance, plasma samples have to be hydrolyzed to a dialyzable product in a dilute hydrochloric acid solution without precipitating plasma proteins. Inulin clearance has become the standard method in determining GFR.
Certain study groups may wish to measure both RPF and GFR. In this circumstance, both PAH and Inutest can be infused together.
Director: Hollenberg, Norman K., MD, Ph.D.
Phone: (617) 732-6682
Director: Barkoudah, Ebrahim, MD, MPH
Phone: (617) 278-0055
Stallings, Jennifer, MS
Phone: (617) 732-5500 ext. 35047
Phone: (617) 278-0055, (617) 732-5500 ext. 35047
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Location of Core: Brigham and Women's Hospital, Peter Bent Building, Department of Radiology, Physiologic Research Division, RA-126, 15 Francis Street, Boston, MA 02115
- Distillation Water Bath
- SEAL AACE 6.04 Software
- SEAL AutoAnalyzer 3
- Glomerular Filtration Rate Assay
This assay is an accurate method of determining Inulin clearance in plasma. Inulin is an ideal substance for determining glomerular filtration rate since it is filtered by the glomerulus, is not absorbed or excreted by the tubules, is not metabolized, causes no known adverse reactions or toxic effects and can be measured by a simple chemical procedure.
- Renal Plasma Flow Assay
This assay is an accurate method of determining plasma PAH levels in blood through determination of PAH excretion rate by measuring infusion rate. This method of measuring PAH plasma clearance provides a precise and accurate measure of renal plasma flow (RPF).
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