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| Content Provider | Directory of Open Access Journals (DOAJ) |
|---|---|
| Author | Dominique Egrise Serge Goldman Piero Marchetti Martin Gotthardt Sophie Laurent Stéphane Demine Alexander Balhuizen Vinciane Debaille Lieke Joosten Maïté Fereau Satya Narayana Murthy Chilla Isabelle Millard Raphaël Scharfmann Carmen Burtea Decio L. Eizirik |
| Abstract | Non-invasive imaging and quantification of human beta cell mass remains a major challenge. We performed pre-clinical in vivo validation of a peptide previously discovered by our group, namely, P88 that targets a beta cell specific biomarker, FXYD2γa. We conjugated P88 with DOTA and then complexed it with GdCl3 to obtain the MRI (magnetic resonance imaging) contrast agent (CA) Gd-DOTA-P88. A scrambled peptide was used as a negative control CA, namely Gd-DOTA-Scramble. The CAs were injected in immunodeficient mice implanted with EndoC-βH1 cells, a human beta cell line that expresses FXYD2γa similarly to primary human beta cells. The xenograft-bearing mice were analyzed by MRI. At the end, the mice were euthanized and the CA biodistribution was evaluated on the excised tissues by measuring the Gd concentration with inductively coupled plasma mass spectrometry (ICP-MS). The MRI and biodistribution studies indicated that Gd-DOTA-P88 accumulates in EndoC-βH1 xenografts above the level observed in the background tissue, and that its uptake is significantly higher than that observed for Gd-DOTA-Scramble. In addition, the Gd-DOTA-P88 showed good xenograft-to-muscle and xenograft-to-liver uptake ratios, two potential sites of human islets transplantation. The CA shows good potential for future use to non-invasively image implanted human beta cells. |
| e-ISSN | 14203049 |
| DOI | 10.3390/molecules23092100 |
| Journal | Molecules |
| Issue Number | 9 |
| Volume Number | 23 |
| Language | English |
| Publisher | MDPI AG |
| Publisher Date | 2018-08-01 |
| Publisher Place | Switzerland |
| Access Restriction | Open |
| Subject Keyword | Organic Chemistry Peptide-based Imaging Beta Cell Imaging Paramagnetic Contrast Agent Non-invasive Imaging Mri Pancreatic Beta Cell Type 1 Diabetes Type 2 Diabetes |
| Content Type | Text |
| Resource Type | Article |
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