UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Non-invasive radioiodine imaging for accurate quantitation of NIS reporter gene expression in transplanted hearts.

Ricci, D; Mennander, AA; Pham, LD; Rao, VP; Miyagi, N; Byrne, GW; Russell, SJ; (2008) Non-invasive radioiodine imaging for accurate quantitation of NIS reporter gene expression in transplanted hearts. Eur J Cardiothorac Surg , 33 (1) pp. 32-39. 10.1016/j.ejcts.2007.09.033.

Full text not available from this repository.

Abstract

OBJECTIVE: We studied the concordance of transgene expression in the transplanted heart using bicistronic adenoviral vector coding for a transgene of interest (human carcinoembryonic antigen: hCEA - beta human chorionic gonadotropin: betahCG) and for a marker imaging transgene (human sodium iodide symporter: hNIS). METHODS: Inbred Lewis rats were used for syngeneic heterotopic cardiac transplantation. Donor rat hearts were perfused ex vivo for 30 min prior to transplantation with University of Wisconsin (UW) solution (n=3), with 10(9) pfu/ml of adenovirus expressing hNIS (Ad-NIS; n=6), hNIS-hCEA (Ad-NIS-CEA; n=6) and hNIS-betahCG (Ad-NIS-CG; n=6). On postoperative day (POD) 5, 10, 15 all animals underwent micro-single photon emission computed tomography/computed tomography (SPECT/CT) imaging of the donor hearts after tail vein injection of 1000 microCi (123)I and blood sample collection for hCEA and betahCG quantification. RESULTS: Significantly higher image intensity was noted in the hearts perfused with Ad-NIS (1.1+/-0.2; 0.9+/-0.07), Ad-NIS-CEA (1.2+/-0.3; 0.9+/-0.1) and Ad-NIS-CG (1.1+/-0.1; 0.9+/-0.1) compared to UW group (0.44+/-0.03; 0.47+/-0.06) on POD 5 and 10 (p<0.05). Serum levels of hCEA and betahCG increased in animals showing high cardiac (123)I uptake, but not in those with lower uptake. Above this threshold, image intensities correlated well with serum levels of hCEA and betahCG (R(2)=0.99 and R(2)=0.96, respectively). CONCLUSIONS: These data demonstrate that hNIS is an excellent reporter gene for the transplanted heart. The expression level of hNIS can be accurately and non-invasively monitored by serial radioisotopic SPECT imaging. High concordance has been demonstrated between imaging and soluble marker peptides at the maximum transgene expression on POD 5.

Type: Article
Title: Non-invasive radioiodine imaging for accurate quantitation of NIS reporter gene expression in transplanted hearts.
Location: Germany
DOI: 10.1016/j.ejcts.2007.09.033
Keywords: Animals, Carcinoembryonic Antigen, Chorionic Gonadotropin, Gene Expression, Genes, Reporter, Heart Transplantation, Iodine Radioisotopes, Male, Rats, Rats, Inbred Lew, Symporters, Tomography, Emission-Computed, Single-Photon, Treatment Outcome
UCL classification: UCL > School of Life and Medical Sciences
UCL > School of Life and Medical Sciences > Faculty of Population Health Sciences
UCL > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute of Cardiovascular Science
URI: http://discovery.ucl.ac.uk/id/eprint/90546
Downloads since deposit
0Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item