当前位置： SCI文献检索 > NUCLEAR MEDICINE AND BIOLOGY期刊下所有文献 > Whole-body distribution and radiation dosimetry of [11C]telmisartan as a biomarker for hepatic organic anion transporting polypeptide (OATP) 1B3.

Whole-body distribution and radiation dosimetry of [11C]telmisartan as a biomarker for hepatic organic anion transporting polypeptide (OATP) 1B3.

Abstract：

INTRODUCTION:Telmisartan, a nonpeptide angiotensin II AT1 receptor antagonist used as an antihypertensive drug, is specifically taken up by the liver through the OATP1B3. PET imaging with [(11)C]telmisartan is expected to provide information about the whole body pharmacokinetics of telmisartan as well as its transport property by OATP1B3. The purpose of the study was to determine the biodistribution and radiation dosimetry of [(11)C]telmisartan in humans. METHODS:Biodistribution of [(11)C]telmisartan was measured in three rats and six healthy male human volunteers. In the rat study, a dynamic emission scan was performed for 90 min. In the human study, dynamic whole-body PET images were acquired after intravenous injection of [(11)C]telmisartan. ROIs were defined for source organs on the PET images to measure time-course of [(11)C]telmisartan uptake as percentage injected dose and the number of disintegration for each organ. Radiation dosimetry was calculated with OLINDA/EXM. RESULTS:In the rat study, most radioactivity was rapidly taken up by the liver and part of it was excreted into the biliary tract and intestine. Extrapolating from the rat data, the effective dose for the adult human being was estimated to be 3.65±0.01 microSv/MBq (n=3). In the human study, most of the tracer was taken up by the liver as well, although not as rapidly as in the rat. The activity in the gall bladder and intestine increased gradually. The effective dose for the adult human being was 4.24±0.09 microSv/MBq (n=6). CONCLUSIONS:[(11)C]Telmisartan is a safe PET tracer with a dosimetry profile comparable to other common (11)C PET tracers.

journal_name

Nucl Med Biol

journal_title

Nuclear medicine and biology

authors

Shimizu K,Takashima T,Yamane T,Sasaki M,Kageyama H,Hashizume Y,Maeda K,Sugiyama Y,Watanabe Y,Senda M

doi

10.1016/j.nucmedbio.2012.01.008

subject

Has Abstract

pub_date

2012-08-01 00:00:00

pages

847-53

issue

6

eissn

0969-8051

issn

1872-9614

pii

S0969-8051(12)00020-0

journal_volume

39

pub_type

临床试验,杂志文章

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