Biological Evaluation of 99mTc-HYNIC-EDDA/tricine-(Ser)3-D4 Peptide for Tumor Targeting

Author(s): Ziba Kazemi, Mona Haddad Zahmatkesh , Seyed Mohammad Abedi , Seyed Jalal Hosseinimehr *.

Journal Name: Current Radiopharmaceuticals

Volume 10 , Issue 2 , 2017

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Abstract:

Background: D4 small peptide (Leu-Ala-Arg-Leu-Leu-Thr) was selected as an appropriate agent for specific targeting of epidermal growth factor receptor (EGFR).

Objective: The aim of study was to investigate the 99mTc-labeled D4 peptide for non-small cell lung tumor targeting.

Method: HYNIC-(Ser)3-D4 peptide was labeled with 99mTc using mixture of tricine and ethylenediamine diacetic acid (EDDA) as co-ligands. The in vitro cellular uptake of radiolabeled peptide was evaluated by blocking test on human non-small cell lung cancer (A-549) cell line and its biodistribution was evaluated in A-549 xenografted nude mice.

Results: This conjugated peptide was labeled with 99mTc in high radiochemical purity and it was highly stable in buffer and serum. The un-blocked to blocked cellular radioactivity ratio was 4- fold that showed a specific binding of this radiolabeled peptide on A-549 cell. Animal biodistribution in A-549 xenografted nude mice showed rapid clearance from blood and other non-target organs. Tumor uptake values as %ID/g (percentage of injection dose per gram of tissue) were 2.47% and 1.30% at 1 and 4 h after injection.

Conclusion: This study showed the 99mTc-EDDA/tricine-HYNIC-(Ser)3-D4 peptide had tumor targeting on the non-small cell lung tumor.

Keywords: Tumor targeting, 99mTc, peptide, EDDA/tricine, lung cancer, EGFR.

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Article Details

VOLUME: 10
ISSUE: 2
Year: 2017
Page: [123 - 130]
Pages: 8
DOI: 10.2174/1874471010666170519165430
Price: $58

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