title: Octreotide-periplocymarin conjugate prodrug for improving targetability and anti-tumor efficiency: synthesis, in vitro and in vivo evaluation.
abstract: Cardiac glycosides could increase intracellular Ca2+ ion by inhibiting the Na+/K+ATPase to induce apoptosis in many tumor cells. However, narrow therapeutic index, poor tumor selectivity and severe cardiovascular toxicity hinder their applications in cancer treatment. To improve the safety profile and tumor targetablility of cardiac glycosides, we designed octreotide conjugated periplocymarin, a cardiac glycoside isolated from Cortex periplocae. The conjugate showed higher cytotoxicity on MCF-7 cells and HepG2 tumor cells (SSTRs overexpression) but much less toxicity in L-02 normal cells. Tissue distribution studies of the conjugate using H22 tumor model in mice showed higher accumulation in tumor and lower distribution in heart and liver than periplocymarin. Furthermore, in vivo anticancer effects of the conjugate on mice bearing H22 cancer xenografts confirmed enhanced anti-tumor efficacy and decreased systemic toxicity. Altogether, octreotide-conjugated periplocymarin demonstrated tumor selectivity and may be useful as a targeting agent to improve the safety profile of cardiac glycosides for cancer therapy.
authors.affiliation: Department of Pharmaceutics, School of Pharmacy, Center for Nano Drug/Gene Delivery and Tissue Engineering, Jiangsu University, Zhenjiang, People's Republic of China.
authors.forename: Hui-Yun
authors.initials: HY
authors.lastname: Zhang
authors.affiliation: Department of Pharmaceutics, School of Pharmacy, Center for Nano Drug/Gene Delivery and Tissue Engineering, Jiangsu University, Zhenjiang, People's Republic of China.
authors.forename: Wen-Qian
authors.initials: WQ
authors.lastname: Xu
authors.affiliation: School of Pharmacy, China Pharmaceutical University, Nanjing, People's Republic of China.
authors.forename: Yuan-Yuan
authors.initials: YY
authors.lastname: Zheng
authors.affiliation: Department of Pharmaceutics, School of Pharmacy, Center for Nano Drug/Gene Delivery and Tissue Engineering, Jiangsu University, Zhenjiang, People's Republic of China.
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Omari-Siaw
authors.affiliation: Department of Pharmaceutics, School of Pharmacy, Center for Nano Drug/Gene Delivery and Tissue Engineering, Jiangsu University, Zhenjiang, People's Republic of China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: Department of Pharmaceutics, School of Pharmacy, Center for Nano Drug/Gene Delivery and Tissue Engineering, Jiangsu University, Zhenjiang, People's Republic of China.
authors.forename: Xia
authors.initials: X
authors.lastname: Cao
authors.affiliation: Department of Pharmaceutics, School of Pharmacy, Center for Nano Drug/Gene Delivery and Tissue Engineering, Jiangsu University, Zhenjiang, People's Republic of China.
authors.forename: Shan-Shan
authors.initials: SS
authors.lastname: Tong
authors.affiliation: Department of Pharmaceutics, School of Pharmacy, Center for Nano Drug/Gene Delivery and Tissue Engineering, Jiangsu University, Zhenjiang, People's Republic of China.|School of Pharmacy, China Pharmaceutical University, Nanjing, People's Republic of China.
authors.forename: Jiang-Nan
authors.initials: JN
authors.lastname: Yu
authors.affiliation: Department of Pharmaceutics, School of Pharmacy, Center for Nano Drug/Gene Delivery and Tissue Engineering, Jiangsu University, Zhenjiang, People's Republic of China.
authors.forename: Xi-Ming
authors.initials: XM
authors.lastname: Xu
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D002301:Cardiac Glycosides / Q000493:pharmacokinetics / Q000494:pharmacology*; D045744:Cell Line, Tumor; D006801:Humans; D008297:Male; D051379:Mice; D009374:Neoplasms, Experimental / Q000188:drug therapy / Q000378:metabolism; D015282:Octreotide / Q000493:pharmacokinetics / Q000494:pharmacology*; D011355:Prodrugs / Q000138:chemical synthesis* / Q000494:pharmacology; D014018:Tissue Distribution
chemical_list: D000970:Antineoplastic Agents; D002301:Cardiac Glycosides; D011355:Prodrugs; C000593569:periplocymarin; D015282:Octreotide
keywords: cardiac glycosides; octreotide; octreotide- periplocymarin conjugate; periplocymarin; targetability