Uremic pruritus: roles of parathyroid hormone and substance P

What Was Tested

Researchers studied Parathyroid Hormone (PTH 1-84) and Substance P in this randomized controlled trial publication.

Their purpose was to evaluate the role of parathyroid hormone (PTH) and substance P in uremic pruritus and to elucidate the underlying mechanisms.

Why It Was Studied

Most patients receiving maintenance hemodialysis have pruritus, but its underlying mechanism remains unknown.

Secondary hyperparathyroidism is another common problem in these patients, but its role in uremic pruritus is controversial.

Who Took Part

The age groups tagged for this paper are middle-aged adults, both men and women.

In phase II, patients with moderate to severe pruritus were placed into two groups: one with high PTH levels and one with low levels.

How the Study Was Run

The researchers set it up as a randomized, double-blind, placebo-controlled and crossover study.

The participants were allocated by chance, so the Parathyroid Hormone (PTH 1-84) group and the comparison group should start out alike.

Blinding on both sides kept the participants and researchers unaware of who received Parathyroid Hormone (PTH 1-84).

The comparison arm used a placebo, so changes seen with Parathyroid Hormone (PTH 1-84) could be set against what happens without it.

In the crossover set-up each of the participants took both Parathyroid Hormone (PTH 1-84) and the comparison in turn, acting as their own control.

The study contained two phases.

In phase I, the researchers analyzed the correlation between the intensity of itching and serum levels of intact PTH.

What Was Measured

Secondary hyperparathyroidism is another common problem in these patients, but its role in uremic pruritus is controversial.

PubMed files the paper under topics including Calcium, Capsaicin, Parathyroid Hormone, Phosphates, Pruritus, Renal Dialysis and Substance P.

What This Means in Plain Language

The paper is a randomized, double-blind and placebo-controlled study of Parathyroid Hormone (PTH 1-84) and Substance P.

Results are reported in around 4 sentences of the abstract; we leave them to the paper itself rather than summarise them.

The publication is from 1997 (Journal of the American Academy of Dermatology), a journal based in United States.

More context: the Parathyroid Hormone (PTH 1-84) compound page and the Substance P compound page, all human trials.