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chronic kidney disease

The CKD-Epi Equation: An Improved MDRD?

Currently, the most widely-utilized method for routine estimation of GFR (eGFR) is the 4-variable MDRD Equation, in which serum creatinine, age, gender and race are the variables entered into a mathematical formula. eGFR as determined by the MDRD…

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A recession-proof profession?

How many nephrologists does the U.S. need? I recently heard a thought-provoking calculation from MGH’s Dr. David Steele which helps illustrate a likely shortage in the number of American nephrologists.  The calculation is admittedly a rough estimate, but…

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Genome-Wide Association Study for CKD

A recent article just published in Nature Genetics by Kottgen et al identifies several loci which appear to confer susceptibility to the development of CKD.  How did researchers identify these genes?  By a genome-wide association study.  Briefly, researchers…

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A better way for CKD staging?

Presently the KDOQI Staging system for CKD (see figure) is what is used most commonly to classify the severity of reduced renal function. This is based purely on an estimation of the GFR, using equations such as the…

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EMT = epithelial-to-mesenchymal transition

The three letter acronym EMT:  what should it mean to nephrologists?  Not just “emergency medical technician”…but also “epithelial-to-mesenchymal transition.”   As we all know the nephron is comprised of a long tube of highly-differentiated epithelial cells.  These cells…

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Limitations of FENa in CKD

There is an insightful article in this month’s C-JASN entitled “Misapplications of Commonly-Used Kidney Equations: Renal Physiology in Practice” by Nguyen et al which is kind of fun to read. One of the clinical vignettes they present involves…

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Underuse of ACS Therapy in CKD

A recent paper in AJKD by Patel et al describes a curious but well-documented phenomenon: the finding that patients with CKD who are hospitalized with acute coronary syndrome (ACS) are less likely to receive therapies known to be…

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MDRD II

Continuing on with a brief discussion of the landmark MDRD Study: at the time of the study, several smaller studies suggested that a low protein diet would prolong time to ESRD for patients with CKD. The theory was…

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MDRD I

The Modification of Diet in Renal Disease (MDRD) Study is one of the landmark papers of Nephrology. The 1994 NEJM paper describing the initial results is freely available, and there are many interesting follow-up studies using the same…

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