[rat-forum] PTH Levels in SD Rat

Raff, Hershel hraff at mcw.edu
Tue Feb 7 09:09:24 CST 2012

Those PTH levels are ridiculously high (see attached paper).  I have also attached a recent paper and a recent editorial on the effects of facility construction in rats.

So could the "stress" increase PTH levels that high?  I am somewhat doubtful but anything is possible. In the attached paper, the combination of halothane and hypoxia increased PTH to about 400 pg/ml.  Were the animals gaining weight appropriately?  Obviously, decreased calcium intake would also increase PTH, although I am not sure to >1000 pg/ml.

My final question - have you measured intact PTH in your rats BEFORE the construction started?  If so, what were the levels.  The issue may not be the construction; it could be a problem with the assay or preanalytical error.

Hershel Raff PhD
Professor of Medicine (Endocrine), Surgery, and Physiology

From: rat-forum-bounces at mcw.edu [rat-forum-bounces at mcw.edu] On Behalf Of rajeshanand at lupinpharma.com [rajeshanand at lupinpharma.com]
Sent: Tuesday, February 07, 2012 12:23 AM
To: rat-forum
Subject: [rat-forum] PTH Levels in SD Rat

Dear Listers,
Could you please let me know what are the normal Parathyroid Hormone (PTH) levels in SD outbred rat ?
For the past six months , our animal facility is being renovated. Along with other mice strains,our SD rat breeding colony animals have also been exposed to construction related noise and vibrations.The scientist's have observed basal PTH levels of 1150pg/ml.I wish to know what are the reasons for elevated levels of PTH ?
Is it possible that noise/vibrations in the area surrounding SD rat animal quarter could have increased levels of PTH ?

Rajesh K. Anand, Ph.D.,
Scientist In-charge,
Research Animal facility,
Novel Drug Discovery & Development ( NDDD),
Lupin Research Park,
46A/47A,Nande Village,
Taluka Mulshi,
(Maharashtra )
Tel : (020)66749440
Fax ; (020)66749560

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