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Tumor Growth Suppression by Gadolinium-Neutron Capture Therapy Using Gadolinium-Entrapped Liposome as Gadolinium Delivery Agent

Tumor Growth Suppression by Gadolinium-Neutron Capture Therapy Using Gadolinium-Entrapped Liposome as Gadolinium Delivery Agent

Novriana Dewi, Hironobu Yanagie, Haito Zhu, Kazuyuki Demachi, Atsuko Shinohara, Kazuhito Yokoyama, Masaki Sekino, Yuriko Sakurai, Yasuyuki Morishita, Naoko Iyomoto, Takeshi Nagasaki, Yukichi Horiguchi, etc.

Biomed Pharmacother. 2013 Jul;67(6):451-7.

PMID: 23743325

Abstract:

Neutron capture therapy (NCT) is a promising non-invasive cancer therapy approach and some recent NCT research has focused on using compounds containing gadolinium as an alternative to currently used boron-10 considering several advantages that gadolinium offers compared to those of boron. In this study, we evaluated gadolinium-entrapped liposome compound as neutron capture therapy agent by in vivo experiment on colon-26 tumor-bearing mice. Gadolinium compound were injected intravenously via tail vein and allowed to accumulate into tumor site. Tumor samples were taken for quantitative analysis by ICP-MS at 2, 12, and 24 h after gadolinium compound injection. Highest gadolinium concentration was observed at about 2 h after gadolinium compound injection with an average of 40.3 μg/g of wet tumor tissue. We performed neutron irradiation at JRR-4 reactor facility of Japan Atomic Energy Research Institute in Tokaimura with average neutron fluence of 2×10¹² n/cm². The experimental results showed that the tumor growth suppression of gadolinium-injected irradiated group was revealed until about four times higher compared to the control group, and no significant weight loss were observed after treatment suggesting low systemic toxicity of this compound. The gadolinium-entrapped liposome will become one of the candidates for Gd delivery system on NCT.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP12008069	Gadolinium boride		12008-06-9	Price

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